{"id":378,"date":"2026-03-12T03:54:18","date_gmt":"2026-03-12T03:54:18","guid":{"rendered":"https:\/\/isbmsolution.com\/?p=378"},"modified":"2026-03-12T05:57:18","modified_gmt":"2026-03-12T05:57:18","slug":"8-common-isbm-defects-root-causes-how-to-fix-them","status":"publish","type":"post","link":"https:\/\/isbmsolution.com\/ja\/application\/8-common-isbm-defects-root-causes-how-to-fix-them\/","title":{"rendered":"ISBM\u306b\u3088\u304f\u3042\u308b8\u3064\u306e\u4e0d\u5177\u5408\uff1a\u6839\u672c\u539f\u56e0\u3068\u89e3\u6c7a\u65b9\u6cd5"},"content":{"rendered":"<nav style=\"background: #fff; border-bottom: 3px solid #f97316; overflow-x: auto; white-space: nowrap; padding: 0 24px;\">\n<div style=\"max-width: 940px; margin: 0 auto; display: inline-flex; min-width: 100%;\"><a style=\"display: inline-block; padding: 14px 13px; font-size: 11px; font-weight: bold; color: #475569; text-decoration: none; border-right: 1px solid #f1f5f9;\" href=\"#intro\">00 \u00b7 Overview<\/a><br \/>\n<a style=\"display: inline-block; padding: 14px 13px; font-size: 11px; font-weight: bold; color: #475569; text-decoration: none; border-right: 1px solid #f1f5f9;\" href=\"#defect1\">01 \u00b7 Pearlescence<\/a><br \/>\n<a style=\"display: inline-block; padding: 14px 13px; font-size: 11px; font-weight: bold; color: #475569; text-decoration: none; border-right: 1px solid #f1f5f9;\" href=\"#defect2\">02 \u00b7 Wall Variation<\/a><br \/>\n<a style=\"display: inline-block; padding: 14px 13px; font-size: 11px; font-weight: bold; color: #475569; text-decoration: none; border-right: 1px solid #f1f5f9;\" href=\"#defect3\">03 \u00b7 Gate Blush<\/a><br \/>\n<a style=\"display: inline-block; padding: 14px 13px; font-size: 11px; font-weight: bold; color: #475569; text-decoration: none; border-right: 1px solid #f1f5f9;\" href=\"#defect4\">04 \u00b7 Short Shot<\/a><br \/>\n<a style=\"display: inline-block; padding: 14px 13px; font-size: 11px; font-weight: bold; color: #475569; text-decoration: none; border-right: 1px solid #f1f5f9;\" href=\"#defect5\">05 \u00b7 Base Peaking<\/a><br \/>\n<a style=\"display: inline-block; padding: 14px 13px; font-size: 11px; font-weight: bold; color: #475569; text-decoration: none; border-right: 1px solid #f1f5f9;\" href=\"#defect6\">06 \u00b7 Top Load<\/a><br \/>\n<a style=\"display: inline-block; padding: 14px 13px; font-size: 11px; font-weight: bold; color: #475569; text-decoration: none; border-right: 1px solid #f1f5f9;\" href=\"#defect7\">07 \u00b7 Blisters<\/a><br \/>\n<a style=\"display: inline-block; padding: 14px 13px; font-size: 11px; font-weight: bold; color: #475569; text-decoration: none; border-right: 1px solid #f1f5f9;\" href=\"#defect8\">08 \u00b7 Neck Distortion<\/a><br \/>\n<a style=\"display: inline-block; padding: 14px 13px; font-size: 11px; font-weight: bold; color: #f97316; text-decoration: none; border-right: 1px solid #f1f5f9; background: #fef9f5;\" href=\"#checklist\">\u2b50 Master Checklist<\/a><br \/>\n<a style=\"display: inline-block; padding: 14px 13px; font-size: 11px; font-weight: bold; color: #475569; text-decoration: none;\" href=\"#faq\">FAQ<\/a><\/div>\n<\/nav>\n<p>&nbsp;<\/p>\n<section id=\"intro\" style=\"margin-bottom: 80px;\">\n<div style=\"display: flex; align-items: center; gap: 14px; margin-bottom: 28px;\">\n<div style=\"background: #f97316; color: #fff; font-family: 'Barlow Condensed',sans-serif; font-size: 11px; font-weight: 900; letter-spacing: 2.5px; padding: 5px 12px; border-radius: 3px; text-transform: uppercase; flex-shrink: 0;\">00<\/div>\n<h2 style=\"font-family: 'Barlow Condensed',sans-serif; font-size: clamp(22px,3.5vw,34px); font-weight: 800; color: #0a1628; margin: 0; letter-spacing: -0.3px;\">Why ISBM Defects Are Harder to Diagnose Than SBM<\/h2>\n<\/div>\n<p style=\"font-size: 16px; color: #374151; margin: 0 0 18px;\">In a two-stage reheat stretch blow molding process, the preform is manufactured separately and reheated before blowing. This separation means injection problems and blowing problems have distinct, traceable origins. In single-stage ISBM, there is no such boundary. The preform goes directly from injection to conditioning to stretch-blow within a single continuous cycle \u2014 meaning a melt temperature set 5\u00b0C too high at Station 1 can produce a cloudy sidewall discovered only after Station 4 ejection.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-105 aligncenter\" src=\"https:\/\/isbmsolution.com\/wp-content\/uploads\/2026\/02\/isbm-banner-e1770628369412.webp\" alt=\"ISBM\u30de\u30b7\u30f3\" width=\"799\" height=\"338\" srcset=\"https:\/\/isbmsolution.com\/wp-content\/uploads\/2026\/02\/isbm-banner-e1770628369412.webp 799w, https:\/\/isbmsolution.com\/wp-content\/uploads\/2026\/02\/isbm-banner-e1770628369412-480x220.webp 480w\" sizes=\"(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) 799px, 100vw\" \/><\/p>\n<p style=\"font-size: 16px; color: #374151; margin: 0 0 28px;\">This cross-station defect propagation is the defining diagnostic challenge of ISBM. The 8 defects documented in this guide represent the most common failure modes encountered in PET bottle production on single-stage machines. For each defect, this article provides: a precise description of visual and dimensional symptoms, the verified root causes, quantified process parameters to investigate, and a step-by-step corrective action sequence.<\/p>\n<div style=\"background: #fff; border-radius: 12px; border: 1px solid #e2e8f0; overflow: hidden; margin-bottom: 40px;\">\n<div style=\"background: linear-gradient(90deg,#0a1628,#0d2244); padding: 18px 24px; display: flex; align-items: center; gap: 12px;\">\n<div style=\"background: #f97316; color: #fff; font-family: 'Barlow Condensed',sans-serif; font-size: 10px; font-weight: 900; letter-spacing: 2px; padding: 4px 10px; border-radius: 3px; text-transform: uppercase;\">Quick Reference<\/div>\n<p><span style=\"font-family: 'Barlow Condensed',sans-serif; font-size: 18px; font-weight: 800; color: #fff;\">8 Defects at a Glance<\/span><\/p>\n<\/div>\n<div style=\"overflow-x: auto;\">\n<table style=\"width: 100%; border-collapse: collapse; font-size: 13px;\">\n<thead>\n<tr style=\"background: #f8fafc; border-bottom: 2px solid #e2e8f0;\">\n<th style=\"padding: 12px 16px; text-align: left; font-weight: 800; color: #0a1628; white-space: nowrap;\">#<\/th>\n<th style=\"padding: 12px 16px; text-align: left; font-weight: 800; color: #0a1628; white-space: nowrap;\">Defect Name<\/th>\n<th style=\"padding: 12px 16px; text-align: left; font-weight: 800; color: #0a1628; white-space: nowrap;\">Primary Cause<\/th>\n<th style=\"padding: 12px 16px; text-align: left; font-weight: 800; color: #0a1628; white-space: nowrap;\">Quick Fix Direction<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr style=\"border-bottom: 1px solid #f1f5f9;\">\n<td style=\"padding: 11px 16px; font-family: 'IBM Plex Mono',monospace; font-weight: 600; color: #f97316;\">01<\/td>\n<td style=\"padding: 11px 16px; font-weight: bold; color: #0a1628;\">Pearlescence &amp; Haze<\/td>\n<td style=\"padding: 11px 16px; color: #475569;\">Insufficient preform temp \/ low blow temp<\/td>\n<td style=\"padding: 11px 16px; color: #374151;\">Raise preform core temp 2\u20133\u00b0C per cycle<\/td>\n<\/tr>\n<tr style=\"border-bottom: 1px solid #f1f5f9; background: #fafafa;\">\n<td style=\"padding: 11px 16px; font-family: 'IBM Plex Mono',monospace; font-weight: 600; color: #f97316;\">02<\/td>\n<td style=\"padding: 11px 16px; font-weight: bold; color: #0a1628;\">Wall Thickness Variation<\/td>\n<td style=\"padding: 11px 16px; color: #475569;\">Uneven preform wall \/ stretch rod misalignment<\/td>\n<td style=\"padding: 11px 16px; color: #374151;\">Check preform IV + stretch rod concentricity<\/td>\n<\/tr>\n<tr style=\"border-bottom: 1px solid #f1f5f9;\">\n<td style=\"padding: 11px 16px; font-family: 'IBM Plex Mono',monospace; font-weight: 600; color: #f97316;\">03<\/td>\n<td style=\"padding: 11px 16px; font-weight: bold; color: #0a1628;\">Gate Blush \/ Stress Marks<\/td>\n<td style=\"padding: 11px 16px; color: #475569;\">Excessive injection speed at gate entry<\/td>\n<td style=\"padding: 11px 16px; color: #374151;\">Reduce Stage 1 fill speed \u226430mm\/s<\/td>\n<\/tr>\n<tr style=\"border-bottom: 1px solid #f1f5f9; background: #fafafa;\">\n<td style=\"padding: 11px 16px; font-family: 'IBM Plex Mono',monospace; font-weight: 600; color: #f97316;\">04<\/td>\n<td style=\"padding: 11px 16px; font-weight: bold; color: #0a1628;\">Short Shot \/ Incomplete Blowing<\/td>\n<td style=\"padding: 11px 16px; color: #475569;\">Low blow pressure \/ blocked mould vents<\/td>\n<td style=\"padding: 11px 16px; color: #374151;\">Increase P2 to \u226535 bar; clear vent slots<\/td>\n<\/tr>\n<tr style=\"border-bottom: 1px solid #f1f5f9;\">\n<td style=\"padding: 11px 16px; font-family: 'IBM Plex Mono',monospace; font-weight: 600; color: #f97316;\">05<\/td>\n<td style=\"padding: 11px 16px; font-weight: bold; color: #0a1628;\">Base Peaking \/ Rocker Bottom<\/td>\n<td style=\"padding: 11px 16px; color: #475569;\">Excessive axial stretch rod speed<\/td>\n<td style=\"padding: 11px 16px; color: #374151;\">Reduce rod speed; verify end-position \u00b10.5mm<\/td>\n<\/tr>\n<tr style=\"border-bottom: 1px solid #f1f5f9; background: #fafafa;\">\n<td style=\"padding: 11px 16px; font-family: 'IBM Plex Mono',monospace; font-weight: 600; color: #f97316;\">06<\/td>\n<td style=\"padding: 11px 16px; font-weight: bold; color: #0a1628;\">Top Load Failure<\/td>\n<td style=\"padding: 11px 16px; color: #475569;\">Insufficient biaxial orientation ratio<\/td>\n<td style=\"padding: 11px 16px; color: #374151;\">Optimise BUR \u226510\u00d7; check mould temp \u226415\u00b0C<\/td>\n<\/tr>\n<tr style=\"border-bottom: 1px solid #f1f5f9;\">\n<td style=\"padding: 11px 16px; font-family: 'IBM Plex Mono',monospace; font-weight: 600; color: #f97316;\">07<\/td>\n<td style=\"padding: 11px 16px; font-weight: bold; color: #0a1628;\">Sidewall Bubbles \/ Blisters<\/td>\n<td style=\"padding: 11px 16px; color: #475569;\">PET moisture content exceeding 50 ppm<\/td>\n<td style=\"padding: 11px 16px; color: #374151;\">Pre-dry at 160\u00b0C \/ \u22654h \/ dew point \u2264\u221240\u00b0C<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 11px 16px; font-family: 'IBM Plex Mono',monospace; font-weight: 600; color: #f97316;\">08<\/td>\n<td style=\"padding: 11px 16px; font-weight: bold; color: #0a1628;\">Neck Finish Distortion<\/td>\n<td style=\"padding: 11px 16px; color: #475569;\">Excess heat in neck zone \/ insufficient clamp<\/td>\n<td style=\"padding: 11px 16px; color: #374155;\">Independent neck cooling \u226410\u00b0C; verify clamp force<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<p><!-- Diagnostic note banner --><\/p>\n<div style=\"background: linear-gradient(135deg,#0a1628,#0d2244); border-radius: 10px; padding: 24px 28px; display: flex; gap: 20px; align-items: flex-start;\">\n<div style=\"flex-shrink: 0; width: 40px; height: 40px; background: rgba(249,115,22,0.15); border: 1px solid rgba(249,115,22,0.35); border-radius: 8px; display: flex; align-items: center; justify-content: center; font-size: 18px;\">\ud83d\udca1<\/div>\n<div>\n<div style=\"font-family: 'Barlow Condensed',sans-serif; font-size: 15px; font-weight: 800; color: #fff; margin-bottom: 6px; letter-spacing: 0.3px;\">ISBM DIAGNOSTIC PRINCIPLE<\/div>\n<p style=\"font-size: 14px; color: #94a3b8; margin: 0; line-height: 1.8;\">Always trace a defect upstream before adjusting the blow station. In single-stage ISBM, 60\u201370% of blowing-stage defects originate at the injection or conditioning stage. Adjusting blow parameters to compensate for a root cause in the injection unit will mask the symptom while allowing material degradation to continue accumulating.<\/p>\n<\/div>\n<\/div>\n<\/section>\n<p><!-- \u2500\u2500 DEFECT 01: PEARLESCENCE \u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500 --><\/p>\n<section id=\"defect1\" style=\"margin-bottom: 80px;\"><!-- Section Header --><\/p>\n<div style=\"display: flex; align-items: center; gap: 14px; margin-bottom: 28px;\">\n<div style=\"background: #f97316; color: #fff; font-family: 'Barlow Condensed',sans-serif; font-size: 11px; font-weight: 900; letter-spacing: 2.5px; padding: 5px 12px; border-radius: 3px; text-transform: uppercase; flex-shrink: 0;\">01<\/div>\n<h2 style=\"font-family: 'Barlow Condensed',sans-serif; font-size: clamp(22px,3.5vw,34px); font-weight: 800; color: #0a1628; margin: 0; letter-spacing: -0.3px;\">Pearlescence &amp; Haze \u2014 Why Your ISBM Bottles Look Cloudy<\/h2>\n<\/div>\n<p><!-- Symptom Badge --><\/p>\n<div style=\"display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 24px;\">\n<div style=\"display: inline-flex; align-items: center; gap: 7px; background: #fef9f5; border: 1px solid #fed7aa; border-radius: 6px; padding: 7px 14px; font-size: 12px; font-weight: bold; color: #c2410c;\">Visual Symptom: Milky-white or foggy appearance on sidewall \/ shoulder<\/div>\n<div style=\"display: inline-flex; align-items: center; gap: 7px; background: #f0fdf4; border: 1px solid #bbf7d0; border-radius: 6px; padding: 7px 14px; font-size: 12px; font-weight: bold; color: #166534;\">Station Origin: Conditioning + Blow<\/div>\n<\/div>\n<p style=\"font-size: 16px; color: #374151; margin: 0 0 18px;\">Pearlescence is one of the most frequently encountered ISBM defects and is visually unmistakable: the finished bottle develops a milky, opaque, or whitish appearance \u2014 typically in the shoulder and upper sidewall \u2014 that is absent from the preform. Transparency is severely reduced. In carbonated beverage applications, this is an immediate disqualifying defect.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-383 aligncenter\" src=\"https:\/\/isbmsolution.com\/wp-content\/uploads\/2026\/03\/Pearlescence-Haze.webp\" alt=\"Pearlescence &amp; Haze\" width=\"801\" height=\"534\" \/><\/p>\n<p style=\"font-size: 16px; color: #374151; margin: 0 0 24px;\">The physical mechanism is well understood. PET is a semi-crystalline polymer with a glass transition temperature (Tg) of approximately 80\u00b0C. Successful stretch blow molding requires the preform to be heated above Tg into the <strong>orientation window (95\u2013115\u00b0C)<\/strong> before blowing. Within this window, the amorphous polymer chains stretch and lock into a highly oriented, transparent structure. If the preform temperature is too low, the polymer is partially crystalline at the point of stretching \u2014 the growing microcrystals scatter visible light, producing the characteristic pearlescent haze.<\/p>\n<p><!-- Causes + Fix side-by-side --><\/p>\n<div style=\"display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-bottom: 28px;\">\n<div style=\"background: #fff; border-radius: 10px; border: 1px solid #e2e8f0; padding: 22px; border-top: 4px solid #f97316;\">\n<div style=\"font-family: 'Barlow Condensed',sans-serif; font-size: 13px; font-weight: 900; letter-spacing: 2px; color: #f97316; text-transform: uppercase; margin-bottom: 14px;\">Root Causes<\/div>\n<ul style=\"margin: 0; padding: 0; list-style: none;\">\n<li style=\"padding: 8px 0; border-bottom: 1px solid #f1f5f9; font-size: 14px; color: #374151; padding-left: 18px; position: relative;\"><span style=\"position: absolute; left: 0; color: #f97316; font-weight: 800;\">\u2192<\/span>Preform core temperature below 95\u00b0C at blow station entry<\/li>\n<li style=\"padding: 8px 0; border-bottom: 1px solid #f1f5f9; font-size: 14px; color: #374151; padding-left: 18px; position: relative;\"><span style=\"position: absolute; left: 0; color: #f97316; font-weight: 800;\">\u2192<\/span>Blow delay too long \u2014 preform cools below Tg before stretching<\/li>\n<li style=\"padding: 8px 0; border-bottom: 1px solid #f1f5f9; font-size: 14px; color: #374151; padding-left: 18px; position: relative;\"><span style=\"position: absolute; left: 0; color: #f97316; font-weight: 800;\">\u2192<\/span>PET IV value below 0.76 dL\/g \u2014 insufficient chain mobility<\/li>\n<li style=\"padding: 8px 0; font-size: 14px; color: #374151; padding-left: 18px; position: relative;\"><span style=\"position: absolute; left: 0; color: #f97316; font-weight: 800;\">\u2192<\/span>Inadequate drying \u2014 residual moisture accelerates crystallisation<\/li>\n<\/ul>\n<\/div>\n<div style=\"background: #fff; border-radius: 10px; border: 1px solid #e2e8f0; padding: 22px; border-top: 4px solid #0d2244;\">\n<div style=\"font-family: 'Barlow Condensed',sans-serif; font-size: 13px; font-weight: 900; letter-spacing: 2px; color: #0d2244; text-transform: uppercase; margin-bottom: 14px;\">Key Parameters<\/div>\n<div style=\"display: flex; flex-direction: column; gap: 8px;\">\n<div style=\"background: #f8fafc; border-radius: 6px; padding: 10px 12px; display: flex; justify-content: space-between; align-items: center;\"><span style=\"font-size: 13px; color: #475569;\">Preform blow-station temp<\/span><br \/>\n<span style=\"font-family: 'IBM Plex Mono',monospace; font-size: 13px; font-weight: 600; color: #0a1628;\">95\u2013115\u00b0C<\/span><\/div>\n<div style=\"background: #f8fafc; border-radius: 6px; padding: 10px 12px; display: flex; justify-content: space-between; align-items: center;\"><span style=\"font-size: 13px; color: #475569;\">PET IV value minimum<\/span><br \/>\n<span style=\"font-family: 'IBM Plex Mono',monospace; font-size: 13px; font-weight: 600; color: #0a1628;\">\u22650.76 dL\/g<\/span><\/div>\n<div style=\"background: #f8fafc; border-radius: 6px; padding: 10px 12px; display: flex; justify-content: space-between; align-items: center;\"><span style=\"font-size: 13px; color: #475569;\">Drying temp \/ time<\/span><br \/>\n<span style=\"font-family: 'IBM Plex Mono',monospace; font-size: 13px; font-weight: 600; color: #0a1628;\">160\u00b0C \/ \u22654h<\/span><\/div>\n<div style=\"background: #f8fafc; border-radius: 6px; padding: 10px 12px; display: flex; justify-content: space-between; align-items: center;\"><span style=\"font-size: 13px; color: #475569;\">Mould cooling water<\/span><br \/>\n<span style=\"font-family: 'IBM Plex Mono',monospace; font-size: 13px; font-weight: 600; color: #0a1628;\">10\u201315\u00b0C<\/span><\/div>\n<\/div>\n<\/div>\n<\/div>\n<p><!-- Fix Steps --><\/p>\n<div style=\"background: #fff; border-radius: 10px; border: 1px solid #e2e8f0; padding: 24px;\">\n<div style=\"font-family: 'Barlow Condensed',sans-serif; font-size: 13px; font-weight: 900; letter-spacing: 2px; color: #0a1628; text-transform: uppercase; margin-bottom: 18px;\">Corrective Action Sequence<\/div>\n<div style=\"display: flex; flex-direction: column; gap: 10px;\">\n<div style=\"display: flex; gap: 14px; align-items: flex-start;\">\n<div style=\"flex-shrink: 0; width: 28px; height: 28px; background: #f97316; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-family: 'Barlow Condensed',sans-serif; font-size: 13px; font-weight: 900; color: #fff;\">1<\/div>\n<p style=\"font-size: 14px; color: #374151; margin: 0; padding-top: 4px;\">Use an IR thermometer to measure preform surface temperature at the blow station entry. If below 100\u00b0C, incrementally raise conditioning heater temperature by <strong>2\u00b0C per cycle<\/strong> and recheck.<\/p>\n<\/div>\n<div style=\"display: flex; gap: 14px; align-items: flex-start;\">\n<div style=\"flex-shrink: 0; width: 28px; height: 28px; background: #f97316; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-family: 'Barlow Condensed',sans-serif; font-size: 13px; font-weight: 900; color: #fff;\">2<\/div>\n<p style=\"font-size: 14px; color: #374151; margin: 0; padding-top: 4px;\">If haze persists after temperature correction, request IV certificate from resin supplier. Values below 0.76 dL\/g require material change or pre-SSP treatment.<\/p>\n<\/div>\n<div style=\"display: flex; gap: 14px; align-items: flex-start;\">\n<div style=\"flex-shrink: 0; width: 28px; height: 28px; background: #f97316; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-family: 'Barlow Condensed',sans-serif; font-size: 13px; font-weight: 900; color: #fff;\">3<\/div>\n<p style=\"font-size: 14px; color: #374151; margin: 0; padding-top: 4px;\">Verify drying equipment performance: confirm dew point at hopper outlet is \u2264\u221240\u00b0C and resin residence time is \u22654 hours at 160\u00b0C. Replace desiccant beds if dew point is drifting.<\/p>\n<\/div>\n<div style=\"display: flex; gap: 14px; align-items: flex-start;\">\n<div style=\"flex-shrink: 0; width: 28px; height: 28px; background: #f97316; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-family: 'Barlow Condensed',sans-serif; font-size: 13px; font-weight: 900; color: #fff;\">4<\/div>\n<p style=\"font-size: 14px; color: #374151; margin: 0; padding-top: 4px;\">Once the defect is resolved, record the corrected parameters on the process control card and lock them. Revisit if ambient humidity increases significantly (seasonal adjustment).<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<p><!-- \u2500\u2500 DEFECT 02: WALL THICKNESS VARIATION \u2500\u2500\u2500\u2500 --><\/p>\n<section id=\"defect2\" style=\"margin-bottom: 80px;\">\n<div style=\"display: flex; align-items: center; gap: 14px; margin-bottom: 28px;\">\n<div style=\"background: #f97316; color: #fff; font-family: 'Barlow Condensed',sans-serif; font-size: 11px; font-weight: 900; letter-spacing: 2.5px; padding: 5px 12px; border-radius: 3px; text-transform: uppercase; flex-shrink: 0;\">02<\/div>\n<h2 style=\"font-family: 'Barlow Condensed',sans-serif; font-size: clamp(22px,3.5vw,34px); font-weight: 800; color: #0a1628; margin: 0; letter-spacing: -0.3px;\">Wall Thickness Variation \u2014 Uneven Walls That Fail Drop Tests<\/h2>\n<\/div>\n<div style=\"display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 24px;\">\n<div style=\"display: inline-flex; align-items: center; gap: 7px; background: #fef9f5; border: 1px solid #fed7aa; border-radius: 6px; padding: 7px 14px; font-size: 12px; font-weight: bold; color: #c2410c;\">Visual Symptom: One side of bottle visibly thicker \/ thinner; asymmetric shoulder<\/div>\n<div style=\"display: inline-flex; align-items: center; gap: 7px; background: #f0fdf4; border: 1px solid #bbf7d0; border-radius: 6px; padding: 7px 14px; font-size: 12px; font-weight: bold; color: #166534;\">Station Origin: Injection (preform) + Blow<\/div>\n<\/div>\n<p style=\"font-size: 16px; color: #374151; margin: 0 0 18px;\">Wall thickness variation manifests as a consistent asymmetry in bottle wall distribution \u2014 one circumferential sector measurably thinner than its opposite, an off-center shoulder, or a base that is thick on one side and thin on the other. The thin zone is mechanically vulnerable: drop tests will consistently fail at the thinnest point, and carbonated beverage bottles may develop stress cracking under internal pressure.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-379 aligncenter\" src=\"https:\/\/isbmsolution.com\/wp-content\/uploads\/2026\/03\/Wall-Thickness-Variation.webp\" alt=\"Wall Thickness Variation\" width=\"800\" height=\"533\" \/><\/p>\n<p style=\"font-size: 16px; color: #374151; margin: 0 0 24px;\">Critically, this defect has two distinct and separate origins that require different corrective actions. The first is a <strong>preform-level problem<\/strong>: if the preform itself has non-uniform wall thickness (a result of injection imbalance or hot runner temperature asymmetry), no stretch-blow process adjustment will create a uniform bottle. The second is a <strong>machine-level problem<\/strong>: a worn or eccentric stretch rod that does not travel centrally through the preform will create asymmetric stretching even from a geometrically perfect preform.<\/p>\n<div style=\"display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-bottom: 28px;\">\n<div style=\"background: #fff; border-radius: 10px; border: 1px solid #e2e8f0; padding: 22px; border-top: 4px solid #f97316;\">\n<div style=\"font-family: 'Barlow Condensed',sans-serif; font-size: 13px; font-weight: 900; letter-spacing: 2px; color: #f97316; text-transform: uppercase; margin-bottom: 14px;\">Root Causes<\/div>\n<ul style=\"margin: 0; padding: 0; list-style: none;\">\n<li style=\"padding: 8px 0; border-bottom: 1px solid #f1f5f9; font-size: 14px; color: #374151; padding-left: 18px; position: relative;\"><span style=\"position: absolute; left: 0; color: #f97316; font-weight: 800;\">\u2192<\/span>Preform wall eccentricity from hot runner temperature imbalance<\/li>\n<li style=\"padding: 8px 0; border-bottom: 1px solid #f1f5f9; font-size: 14px; color: #374151; padding-left: 18px; position: relative;\"><span style=\"position: absolute; left: 0; color: #f97316; font-weight: 800;\">\u2192<\/span>Stretch rod worn, bent, or not concentric with preform axis<\/li>\n<li style=\"padding: 8px 0; border-bottom: 1px solid #f1f5f9; font-size: 14px; color: #374151; padding-left: 18px; position: relative;\"><span style=\"position: absolute; left: 0; color: #f97316; font-weight: 800;\">\u2192<\/span>Asymmetric conditioning \u2014 one side of preform hotter than other<\/li>\n<li style=\"padding: 8px 0; font-size: 14px; color: #374151; padding-left: 18px; position: relative;\"><span style=\"position: absolute; left: 0; color: #f97316; font-weight: 800;\">\u2192<\/span>Preform not seated correctly in blow cavity (damaged locating pin)<\/li>\n<\/ul>\n<\/div>\n<div style=\"background: #fff; border-radius: 10px; border: 1px solid #e2e8f0; padding: 22px; border-top: 4px solid #0d2244;\">\n<div style=\"font-family: 'Barlow Condensed',sans-serif; font-size: 13px; font-weight: 900; letter-spacing: 2px; color: #0d2244; text-transform: uppercase; margin-bottom: 14px;\">Measurement Targets<\/div>\n<div style=\"display: flex; flex-direction: column; gap: 8px;\">\n<div style=\"background: #f8fafc; border-radius: 6px; padding: 10px 12px; display: flex; justify-content: space-between; align-items: center;\"><span style=\"font-size: 13px; color: #475569;\">Preform wall eccentricity max<\/span><br \/>\n<span style=\"font-family: 'IBM Plex Mono',monospace; font-size: 13px; font-weight: 600; color: #0a1628;\">\u22640.05mm<\/span><\/div>\n<div style=\"background: #f8fafc; border-radius: 6px; padding: 10px 12px; display: flex; justify-content: space-between; align-items: center;\"><span style=\"font-size: 13px; color: #475569;\">Hot runner zone temp tolerance<\/span><br \/>\n<span style=\"font-family: 'IBM Plex Mono',monospace; font-size: 13px; font-weight: 600; color: #0a1628;\">\u00b12\u00b0C<\/span><\/div>\n<div style=\"background: #f8fafc; border-radius: 6px; padding: 10px 12px; display: flex; justify-content: space-between; align-items: center;\"><span style=\"font-size: 13px; color: #475569;\">Stretch rod run-out max<\/span><br \/>\n<span style=\"font-family: 'IBM Plex Mono',monospace; font-size: 13px; font-weight: 600; color: #0a1628;\">\u22640.1mm TIR<\/span><\/div>\n<div style=\"background: #f8fafc; border-radius: 6px; padding: 10px 12px; display: flex; justify-content: space-between; align-items: center;\"><span style=\"font-size: 13px; color: #475569;\">Preform 4-point wall balance<\/span><br \/>\n<span style=\"font-family: 'IBM Plex Mono',monospace; font-size: 13px; font-weight: 600; color: #0a1628;\">&lt;5% deviation<\/span><\/div>\n<\/div>\n<\/div>\n<\/div>\n<div style=\"background: #fff; border-radius: 10px; border: 1px solid #e2e8f0; padding: 24px;\">\n<div style=\"font-family: 'Barlow Condensed',sans-serif; font-size: 13px; font-weight: 900; letter-spacing: 2px; color: #0a1628; text-transform: uppercase; margin-bottom: 18px;\">Corrective Action Sequence<\/div>\n<div style=\"display: flex; flex-direction: column; gap: 10px;\">\n<div style=\"display: flex; gap: 14px; align-items: flex-start;\">\n<div style=\"flex-shrink: 0; width: 28px; height: 28px; background: #f97316; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-family: 'Barlow Condensed',sans-serif; font-size: 13px; font-weight: 900; color: #fff;\">1<\/div>\n<p style=\"font-size: 14px; color: #374151; margin: 0; padding-top: 4px;\"><strong>Diagnose origin first.<\/strong> Measure the preform wall thickness at 0\u00b0, 90\u00b0, 180\u00b0, and 270\u00b0 using a calibrated ultrasonic gauge. If eccentricity exceeds 0.05mm, the problem is in the injection tool \u2014 proceed to Step 2. If the preform is symmetric, the problem is mechanical \u2014 proceed to Step 3.<\/p>\n<\/div>\n<div style=\"display: flex; gap: 14px; align-items: flex-start;\">\n<div style=\"flex-shrink: 0; width: 28px; height: 28px; background: #f97316; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-family: 'Barlow Condensed',sans-serif; font-size: 13px; font-weight: 900; color: #fff;\">2<\/div>\n<p style=\"font-size: 14px; color: #374151; margin: 0; padding-top: 4px;\"><strong>Hot runner balance correction.<\/strong> Check individual zone thermocouple readings. Zones deviating by more than \u00b12\u00b0C should be recalibrated. Also check for blocked hot runner tips causing localised flow restriction.<\/p>\n<\/div>\n<div style=\"display: flex; gap: 14px; align-items: flex-start;\">\n<div style=\"flex-shrink: 0; width: 28px; height: 28px; background: #f97316; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-family: 'Barlow Condensed',sans-serif; font-size: 13px; font-weight: 900; color: #fff;\">3<\/div>\n<p style=\"font-size: 14px; color: #374151; margin: 0; padding-top: 4px;\"><strong>Stretch rod inspection.<\/strong> Remove rod and check TIR (total indicator runout) on a V-block. Replace if runout exceeds 0.1mm. Check rod-to-preform clearance; excessive clearance allows rod to float off-center during travel.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<p><!-- \u2500\u2500 DEFECT 03: GATE BLUSH \u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500 --><\/p>\n<section id=\"defect3\" style=\"margin-bottom: 80px;\">\n<div style=\"display: flex; align-items: center; gap: 14px; margin-bottom: 28px;\">\n<div style=\"background: #f97316; color: #fff; font-family: 'Barlow Condensed',sans-serif; font-size: 11px; font-weight: 900; letter-spacing: 2.5px; padding: 5px 12px; border-radius: 3px; text-transform: uppercase; flex-shrink: 0;\">03<\/div>\n<h2 style=\"font-family: 'Barlow Condensed',sans-serif; font-size: clamp(22px,3.5vw,34px); font-weight: 800; color: #0a1628; margin: 0; letter-spacing: -0.3px;\">Gate Blush &amp; Stress Marks \u2014 Fixing the White Ring at the Base<\/h2>\n<\/div>\n<div style=\"display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 24px;\">\n<div style=\"display: inline-flex; align-items: center; gap: 7px; background: #fef9f5; border: 1px solid #fed7aa; border-radius: 6px; padding: 7px 14px; font-size: 12px; font-weight: bold; color: #c2410c;\">Visual Symptom: Radial white stress marks or haze ring at bottle base gate point<\/div>\n<div style=\"display: inline-flex; align-items: center; gap: 7px; background: #f0fdf4; border: 1px solid #bbf7d0; border-radius: 6px; padding: 7px 14px; font-size: 12px; font-weight: bold; color: #166534;\">Station Origin: Injection (primary)<\/div>\n<\/div>\n<p style=\"font-size: 16px; color: #374151; margin: 0 0 18px;\">Gate blush presents as a characteristic ring or starburst pattern of white, opaque, or glossy-differential material radiating from the injection gate point at the bottle base. It is often only clearly visible when the bottle is filled with a dark liquid or viewed under polarised light, making it easy to miss at the inline inspection station \u2014 and equally easy for customers to detect after filling.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-385 aligncenter\" src=\"https:\/\/isbmsolution.com\/wp-content\/uploads\/2026\/03\/Gate-Blush-Stress-Marks.webp\" alt=\"Gate Blush &amp; Stress Marks\" width=\"800\" height=\"533\" \/><\/p>\n<p style=\"font-size: 16px; color: #374151; margin: 0 0 24px;\">The cause is shear stress concentration at the gate during the initial fill phase. As PET melt accelerates through the narrow gate orifice, it experiences a sudden and extreme shear rate. If this rate exceeds the material&#8217;s relaxation capacity (determined by melt temperature, gate size, and fill velocity), molecular chains are forced into a frozen, highly stressed orientation at the point of entry \u2014 creating the visible stress pattern that survives through to the finished bottle.<\/p>\n<div style=\"display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-bottom: 28px;\">\n<div style=\"background: #fff; border-radius: 10px; border: 1px solid #e2e8f0; padding: 22px; border-top: 4px solid #f97316;\">\n<div style=\"font-family: 'Barlow Condensed',sans-serif; font-size: 13px; font-weight: 900; letter-spacing: 2px; color: #f97316; text-transform: uppercase; margin-bottom: 14px;\">Root Causes<\/div>\n<ul style=\"margin: 0; padding: 0; list-style: none;\">\n<li style=\"padding: 8px 0; border-bottom: 1px solid #f1f5f9; font-size: 14px; color: #374151; padding-left: 18px; position: relative;\"><span style=\"position: absolute; left: 0; color: #f97316; font-weight: 800;\">\u2192<\/span>Stage 1 injection velocity too high \u2014 excessive shear at gate entry<\/li>\n<li style=\"padding: 8px 0; border-bottom: 1px solid #f1f5f9; font-size: 14px; color: #374151; padding-left: 18px; position: relative;\"><span style=\"position: absolute; left: 0; color: #f97316; font-weight: 800;\">\u2192<\/span>Gate diameter undersized \u2014 concentrates shear in too small an area<\/li>\n<li style=\"padding: 8px 0; border-bottom: 1px solid #f1f5f9; font-size: 14px; color: #374151; padding-left: 18px; position: relative;\"><span style=\"position: absolute; left: 0; color: #f97316; font-weight: 800;\">\u2192<\/span>Hold pressure time too short \u2014 residual stress cannot relax<\/li>\n<li style=\"padding: 8px 0; font-size: 14px; color: #374151; padding-left: 18px; position: relative;\"><span style=\"position: absolute; left: 0; color: #f97316; font-weight: 800;\">\u2192<\/span>Insufficient gate zone cooling \u2014 frozen stress not relieved<\/li>\n<\/ul>\n<\/div>\n<div style=\"background: #fff; border-radius: 10px; border: 1px solid #e2e8f0; padding: 22px; border-top: 4px solid #0d2244;\">\n<div style=\"font-family: 'Barlow Condensed',sans-serif; font-size: 13px; font-weight: 900; letter-spacing: 2px; color: #0d2244; text-transform: uppercase; margin-bottom: 14px;\">Key Parameters<\/div>\n<div style=\"display: flex; flex-direction: column; gap: 8px;\">\n<div style=\"background: #f8fafc; border-radius: 6px; padding: 10px 12px; display: flex; justify-content: space-between; align-items: center;\"><span style=\"font-size: 13px; color: #475569;\">Stage 1 injection speed max<\/span><br \/>\n<span style=\"font-family: 'IBM Plex Mono',monospace; font-size: 13px; font-weight: 600; color: #0a1628;\">\u226430 mm\/s<\/span><\/div>\n<div style=\"background: #f8fafc; border-radius: 6px; padding: 10px 12px; display: flex; justify-content: space-between; align-items: center;\"><span style=\"font-size: 13px; color: #475569;\">Hot tip gate diameter<\/span><br \/>\n<span style=\"font-family: 'IBM Plex Mono',monospace; font-size: 13px; font-weight: 600; color: #0a1628;\">0.8\u20131.2 mm<\/span><\/div>\n<div style=\"background: #f8fafc; border-radius: 6px; padding: 10px 12px; display: flex; justify-content: space-between; align-items: center;\"><span style=\"font-size: 13px; color: #475569;\">Hold pressure time<\/span><br \/>\n<span style=\"font-family: 'IBM Plex Mono',monospace; font-size: 13px; font-weight: 600; color: #0a1628;\">1.5\u20133.0 s<\/span><\/div>\n<div style=\"background: #f8fafc; border-radius: 6px; padding: 10px 12px; display: flex; justify-content: space-between; align-items: center;\"><span style=\"font-size: 13px; color: #475569;\">Stage 1 fill percentage<\/span><br \/>\n<span style=\"font-family: 'IBM Plex Mono',monospace; font-size: 13px; font-weight: 600; color: #0a1628;\">0\u201310% of shot<\/span><\/div>\n<\/div>\n<\/div>\n<\/div>\n<div style=\"background: #fff; border-radius: 10px; border: 1px solid #e2e8f0; padding: 24px;\">\n<div style=\"font-family: 'Barlow Condensed',sans-serif; font-size: 13px; font-weight: 900; letter-spacing: 2px; color: #0a1628; text-transform: uppercase; margin-bottom: 18px;\">Corrective Action Sequence<\/div>\n<div style=\"display: flex; flex-direction: column; gap: 10px;\">\n<div style=\"display: flex; gap: 14px; align-items: flex-start;\">\n<div style=\"flex-shrink: 0; width: 28px; height: 28px; background: #f97316; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-family: 'Barlow Condensed',sans-serif; font-size: 13px; font-weight: 900; color: #fff;\">1<\/div>\n<p style=\"font-size: 14px; color: #374151; margin: 0; padding-top: 4px;\">Reduce Stage 1 injection velocity by 20% from current setting. Run 5 cycles and inspect gate area under polarised light. If marks diminish, continue reducing in 10% steps until minimum effective speed is found.<\/p>\n<\/div>\n<div style=\"display: flex; gap: 14px; align-items: flex-start;\">\n<div style=\"flex-shrink: 0; width: 28px; height: 28px; background: #f97316; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-family: 'Barlow Condensed',sans-serif; font-size: 13px; font-weight: 900; color: #fff;\">2<\/div>\n<p style=\"font-size: 14px; color: #374151; margin: 0; padding-top: 4px;\">If velocity reduction alone is insufficient, inspect the gate tip under magnification for wear, erosion, or partial blockage that would increase effective shear rate. Replace worn gate inserts.<\/p>\n<\/div>\n<div style=\"display: flex; gap: 14px; align-items: flex-start;\">\n<div style=\"flex-shrink: 0; width: 28px; height: 28px; background: #f97316; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-family: 'Barlow Condensed',sans-serif; font-size: 13px; font-weight: 900; color: #fff;\">3<\/div>\n<p style=\"font-size: 14px; color: #374151; margin: 0; padding-top: 4px;\">Extend hold pressure time by 0.5 s increments. The hold phase allows residual shear stress to relax while the melt is still above Tg. Verify that extending hold time does not negatively impact cycle time beyond acceptable limits.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<p><!-- \u2500\u2500 DEFECT 04: SHORT SHOT \u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500 --><\/p>\n<section id=\"defect4\" style=\"margin-bottom: 80px;\">\n<div style=\"display: flex; align-items: center; gap: 14px; margin-bottom: 28px;\">\n<div style=\"background: #f97316; color: #fff; font-family: 'Barlow Condensed',sans-serif; font-size: 11px; font-weight: 900; letter-spacing: 2.5px; padding: 5px 12px; border-radius: 3px; text-transform: uppercase; flex-shrink: 0;\">04<\/div>\n<h2 style=\"font-family: 'Barlow Condensed',sans-serif; font-size: clamp(22px,3.5vw,34px); font-weight: 800; color: #0a1628; margin: 0; letter-spacing: -0.3px;\">Short Shot \u2014 Bottle Doesn&#8217;t Fill the Mould Completely<\/h2>\n<\/div>\n<div style=\"display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 24px;\">\n<div style=\"display: inline-flex; align-items: center; gap: 7px; background: #fef9f5; border: 1px solid #fed7aa; border-radius: 6px; padding: 7px 14px; font-size: 12px; font-weight: bold; color: #c2410c;\">Visual Symptom: Incomplete bottle profile \u2014 truncated shoulder or top; undersize volume<\/div>\n<div style=\"display: inline-flex; align-items: center; gap: 7px; background: #f0fdf4; border: 1px solid #bbf7d0; border-radius: 6px; padding: 7px 14px; font-size: 12px; font-weight: bold; color: #166534;\">Station Origin: Blow (primary)<\/div>\n<\/div>\n<p style=\"font-size: 16px; color: #374151; margin: 0 0 18px;\">A short shot in the blow stage produces a bottle that fails to achieve full cavity contact \u2014 the material does not expand sufficiently to fill the mould, resulting in a truncated shoulder, reduced height, or collapsed top section. Unlike injection short shots, blow-stage short shots are typically consistent across cavities affected by the same pressure or timing setting.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-382 aligncenter\" src=\"https:\/\/isbmsolution.com\/wp-content\/uploads\/2026\/03\/Short-Shot-Incomplete-Blowing.webp\" alt=\"Short Shot \/ Incomplete Blowing\" width=\"800\" height=\"533\" \/><\/p>\n<div style=\"display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-bottom: 28px;\">\n<div style=\"background: #fff; border-radius: 10px; border: 1px solid #e2e8f0; padding: 22px; border-top: 4px solid #f97316;\">\n<div style=\"font-family: 'Barlow Condensed',sans-serif; font-size: 13px; font-weight: 900; letter-spacing: 2px; color: #f97316; text-transform: uppercase; margin-bottom: 14px;\">Root Causes<\/div>\n<ul style=\"margin: 0; padding: 0; list-style: none;\">\n<li style=\"padding: 8px 0; border-bottom: 1px solid #f1f5f9; font-size: 14px; color: #374151; padding-left: 18px; position: relative;\"><span style=\"position: absolute; left: 0; color: #f97316; font-weight: 800;\">\u2192<\/span>High-pressure blow (P2) too low \u2014 material cannot reach cavity wall<\/li>\n<li style=\"padding: 8px 0; border-bottom: 1px solid #f1f5f9; font-size: 14px; color: #374151; padding-left: 18px; position: relative;\"><span style=\"position: absolute; left: 0; color: #f97316; font-weight: 800;\">\u2192<\/span>High-pressure blow time too short \u2014 pressure not sustained long enough<\/li>\n<li style=\"padding: 8px 0; border-bottom: 1px solid #f1f5f9; font-size: 14px; color: #374151; padding-left: 18px; position: relative;\"><span style=\"position: absolute; left: 0; color: #f97316; font-weight: 800;\">\u2192<\/span>Mould vent slots blocked \u2014 trapped air creates back-pressure<\/li>\n<li style=\"padding: 8px 0; font-size: 14px; color: #374151; padding-left: 18px; position: relative;\"><span style=\"position: absolute; left: 0; color: #f97316; font-weight: 800;\">\u2192<\/span>Preform temperature too low \u2014 insufficient material fluidity for expansion<\/li>\n<\/ul>\n<\/div>\n<div style=\"background: #fff; border-radius: 10px; border: 1px solid #e2e8f0; padding: 22px; border-top: 4px solid #0d2244;\">\n<div style=\"font-family: 'Barlow Condensed',sans-serif; font-size: 13px; font-weight: 900; letter-spacing: 2px; color: #0d2244; text-transform: uppercase; margin-bottom: 14px;\">Key Parameters<\/div>\n<div style=\"display: flex; flex-direction: column; gap: 8px;\">\n<div style=\"background: #f8fafc; border-radius: 6px; padding: 10px 12px; display: flex; justify-content: space-between; align-items: center;\"><span style=\"font-size: 13px; color: #475569;\">Pre-blow pressure (P1)<\/span><br \/>\n<span style=\"font-family: 'IBM Plex Mono',monospace; font-size: 13px; font-weight: 600; color: #0a1628;\">8\u201312 bar<\/span><\/div>\n<div style=\"background: #f8fafc; border-radius: 6px; padding: 10px 12px; display: flex; justify-content: space-between; align-items: center;\"><span style=\"font-size: 13px; color: #475569;\">High-blow pressure (P2)<\/span><br \/>\n<span style=\"font-family: 'IBM Plex Mono',monospace; font-size: 13px; font-weight: 600; color: #0a1628;\">35\u201340 bar<\/span><\/div>\n<div style=\"background: #f8fafc; border-radius: 6px; padding: 10px 12px; display: flex; justify-content: space-between; align-items: center;\"><span style=\"font-size: 13px; color: #475569;\">High-blow time minimum<\/span><br \/>\n<span style=\"font-family: 'IBM Plex Mono',monospace; font-size: 13px; font-weight: 600; color: #0a1628;\">\u22650.3 s<\/span><\/div>\n<div style=\"background: #f8fafc; border-radius: 6px; padding: 10px 12px; display: flex; justify-content: space-between; align-items: center;\"><span style=\"font-size: 13px; color: #475569;\">Vent slot depth (guideline)<\/span><br \/>\n<span style=\"font-family: 'IBM Plex Mono',monospace; font-size: 13px; font-weight: 600; color: #0a1628;\">0.03\u20130.05 mm<\/span><\/div>\n<\/div>\n<\/div>\n<\/div>\n<div style=\"background: #fff; border-radius: 10px; border: 1px solid #e2e8f0; padding: 24px;\">\n<div style=\"font-family: 'Barlow Condensed',sans-serif; font-size: 13px; font-weight: 900; letter-spacing: 2px; color: #0a1628; text-transform: uppercase; margin-bottom: 18px;\">Corrective Action Sequence<\/div>\n<div style=\"display: flex; flex-direction: column; gap: 10px;\">\n<div style=\"display: flex; gap: 14px; align-items: flex-start;\">\n<div style=\"flex-shrink: 0; width: 28px; height: 28px; background: #f97316; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-family: 'Barlow Condensed',sans-serif; font-size: 13px; font-weight: 900; color: #fff;\">1<\/div>\n<p style=\"font-size: 14px; color: #374151; margin: 0; padding-top: 4px;\">Verify P2 pressure at the mould inlet (not just at the regulator). Line pressure drop can be significant. If inlet pressure is below 33 bar, increase regulator setting and re-measure.<\/p>\n<\/div>\n<div style=\"display: flex; gap: 14px; align-items: flex-start;\">\n<div style=\"flex-shrink: 0; width: 28px; height: 28px; background: #f97316; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-family: 'Barlow Condensed',sans-serif; font-size: 13px; font-weight: 900; color: #fff;\">2<\/div>\n<p style=\"font-size: 14px; color: #374151; margin: 0; padding-top: 4px;\">Open the blow mould and inspect vent slots \u2014 typically located at the parting line and base insert \u2014 for PET residue or tool damage. Clean with ultrasonic bath if contaminated. Confirm slot depth is 0.03\u20130.05mm.<\/p>\n<\/div>\n<div style=\"display: flex; gap: 14px; align-items: flex-start;\">\n<div style=\"flex-shrink: 0; width: 28px; height: 28px; background: #f97316; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-family: 'Barlow Condensed',sans-serif; font-size: 13px; font-weight: 900; color: #fff;\">3<\/div>\n<p style=\"font-size: 14px; color: #374151; margin: 0; padding-top: 4px;\">If pressure and venting are confirmed correct, check preform temperature. Cold preforms require higher pressure to expand. Raise conditioning temperature 3\u00b0C and re-test before increasing P2 further.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<p><!-- \u2500\u2500 DEFECT 05: BASE PEAKING \u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500 --><\/p>\n<section id=\"defect5\" style=\"margin-bottom: 80px;\">\n<div style=\"display: flex; align-items: center; gap: 14px; margin-bottom: 28px;\">\n<div style=\"background: #f97316; color: #fff; font-family: 'Barlow Condensed',sans-serif; font-size: 11px; font-weight: 900; letter-spacing: 2.5px; padding: 5px 12px; border-radius: 3px; text-transform: uppercase; flex-shrink: 0;\">05<\/div>\n<h2 style=\"font-family: 'Barlow Condensed',sans-serif; font-size: clamp(22px,3.5vw,34px); font-weight: 800; color: #0a1628; margin: 0; letter-spacing: -0.3px;\">Base Peaking &amp; Rocker Bottom \u2014 Bottles That Won&#8217;t Stand Upright<\/h2>\n<\/div>\n<div style=\"display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 24px;\">\n<div style=\"display: inline-flex; align-items: center; gap: 7px; background: #fef9f5; border: 1px solid #fed7aa; border-radius: 6px; padding: 7px 14px; font-size: 12px; font-weight: bold; color: #c2410c;\">Visual Symptom: Base centre inverted inward (peaking) or asymmetric rocking base<\/div>\n<div style=\"display: inline-flex; align-items: center; gap: 7px; background: #f0fdf4; border: 1px solid #bbf7d0; border-radius: 6px; padding: 7px 14px; font-size: 12px; font-weight: bold; color: #166534;\">Station Origin: Blow (stretch rod mechanics)<\/div>\n<\/div>\n<p style=\"font-size: 16px; color: #374151; margin: 0 0 18px;\">Base peaking describes a condition where the bottle base centre is drawn inward excessively, creating a pointed or deeply concave base geometry that prevents stable freestanding. Rocker bottom is a related condition where the base is asymmetric \u2014 higher on one side than the other \u2014 causing the bottle to rock rather than stand stable. Both are functionally unacceptable for PET bottles destined for filling lines with base-contact conveying.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-386 aligncenter\" src=\"https:\/\/isbmsolution.com\/wp-content\/uploads\/2026\/03\/Base-Peaking-Rocker-Bottom.webp\" alt=\"Base Peaking &amp; Rocker Bottom\" width=\"800\" height=\"533\" \/><\/p>\n<div style=\"display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-bottom: 28px;\">\n<div style=\"background: #fff; border-radius: 10px; border: 1px solid #e2e8f0; padding: 22px; border-top: 4px solid #f97316;\">\n<div style=\"font-family: 'Barlow Condensed',sans-serif; font-size: 13px; font-weight: 900; letter-spacing: 2px; color: #f97316; text-transform: uppercase; margin-bottom: 14px;\">Root Causes<\/div>\n<ul style=\"margin: 0; padding: 0; list-style: none;\">\n<li style=\"padding: 8px 0; border-bottom: 1px solid #f1f5f9; font-size: 14px; color: #374151; padding-left: 18px; position: relative;\"><span style=\"position: absolute; left: 0; color: #f97316; font-weight: 800;\">\u2192<\/span>Stretch rod axial velocity too high \u2014 over-stretches base material<\/li>\n<li style=\"padding: 8px 0; border-bottom: 1px solid #f1f5f9; font-size: 14px; color: #374151; padding-left: 18px; position: relative;\"><span style=\"position: absolute; left: 0; color: #f97316; font-weight: 800;\">\u2192<\/span>Stretch rod end position too deep \u2014 rod contacts base mould insert<\/li>\n<li style=\"padding: 8px 0; border-bottom: 1px solid #f1f5f9; font-size: 14px; color: #374151; padding-left: 18px; position: relative;\"><span style=\"position: absolute; left: 0; color: #f97316; font-weight: 800;\">\u2192<\/span>Pre-blow pressure (P1) too low \u2014 base unsupported during axial stretch<\/li>\n<li style=\"padding: 8px 0; font-size: 14px; color: #374151; padding-left: 18px; position: relative;\"><span style=\"position: absolute; left: 0; color: #f97316; font-weight: 800;\">\u2192<\/span>Preform base wall thickness below design spec (&lt;3.5mm for small bottles)<\/li>\n<\/ul>\n<\/div>\n<div style=\"background: #fff; border-radius: 10px; border: 1px solid #e2e8f0; padding: 22px; border-top: 4px solid #0d2244;\">\n<div style=\"font-family: 'Barlow Condensed',sans-serif; font-size: 13px; font-weight: 900; letter-spacing: 2px; color: #0d2244; text-transform: uppercase; margin-bottom: 14px;\">Key Parameters<\/div>\n<div style=\"display: flex; flex-direction: column; gap: 8px;\">\n<div style=\"background: #f8fafc; border-radius: 6px; padding: 10px 12px; display: flex; justify-content: space-between; align-items: center;\"><span style=\"font-size: 13px; color: #475569;\">Stretch rod speed range<\/span><br \/>\n<span style=\"font-family: 'IBM Plex Mono',monospace; font-size: 13px; font-weight: 600; color: #0a1628;\">1.0\u20131.5 m\/s<\/span><\/div>\n<div style=\"background: #f8fafc; border-radius: 6px; padding: 10px 12px; display: flex; justify-content: space-between; align-items: center;\"><span style=\"font-size: 13px; color: #475569;\">Rod end-position tolerance<\/span><br \/>\n<span style=\"font-family: 'IBM Plex Mono',monospace; font-size: 13px; font-weight: 600; color: #0a1628;\">\u00b10.5 mm<\/span><\/div>\n<div style=\"background: #f8fafc; border-radius: 6px; padding: 10px 12px; display: flex; justify-content: space-between; align-items: center;\"><span style=\"font-size: 13px; color: #475569;\">Axial stretch ratio target<\/span><br \/>\n<span style=\"font-family: 'IBM Plex Mono',monospace; font-size: 13px; font-weight: 600; color: #0a1628;\">2.5\u20133.0\u00d7<\/span><\/div>\n<div style=\"background: #f8fafc; border-radius: 6px; padding: 10px 12px; display: flex; justify-content: space-between; align-items: center;\"><span style=\"font-size: 13px; color: #475569;\">Preform base wall min.<\/span><br \/>\n<span style=\"font-family: 'IBM Plex Mono',monospace; font-size: 13px; font-weight: 600; color: #0a1628;\">\u22653.5 mm<\/span><\/div>\n<\/div>\n<\/div>\n<\/div>\n<div style=\"background: #fff; border-radius: 10px; border: 1px solid #e2e8f0; padding: 24px;\">\n<div style=\"font-family: 'Barlow Condensed',sans-serif; font-size: 13px; font-weight: 900; letter-spacing: 2px; color: #0a1628; text-transform: uppercase; margin-bottom: 18px;\">Corrective Action Sequence<\/div>\n<div style=\"display: flex; flex-direction: column; gap: 10px;\">\n<div style=\"display: flex; gap: 14px; align-items: flex-start;\">\n<div style=\"flex-shrink: 0; width: 28px; height: 28px; background: #f97316; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-family: 'Barlow Condensed',sans-serif; font-size: 13px; font-weight: 900; color: #fff;\">1<\/div>\n<p style=\"font-size: 14px; color: #374151; margin: 0; padding-top: 4px;\">Confirm stretch rod end-stop position against tooling drawing. Use a depth gauge to measure actual rod travel distance from datum. Re-adjust end-stop if outside \u00b10.5mm of specification.<\/p>\n<\/div>\n<div style=\"display: flex; gap: 14px; align-items: flex-start;\">\n<div style=\"flex-shrink: 0; width: 28px; height: 28px; background: #f97316; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-family: 'Barlow Condensed',sans-serif; font-size: 13px; font-weight: 900; color: #fff;\">2<\/div>\n<p style=\"font-size: 14px; color: #374151; margin: 0; padding-top: 4px;\">Reduce stretch rod velocity in 0.1 m\/s decrements from current setting. Evaluate base geometry after each adjustment. Target is the lowest velocity that still achieves full body stretch without rocker base.<\/p>\n<\/div>\n<div style=\"display: flex; gap: 14px; align-items: flex-start;\">\n<div style=\"flex-shrink: 0; width: 28px; height: 28px; background: #f97316; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-family: 'Barlow Condensed',sans-serif; font-size: 13px; font-weight: 900; color: #fff;\">3<\/div>\n<p style=\"font-size: 14px; color: #374151; margin: 0; padding-top: 4px;\">If rocker bottom is asymmetric (one side higher), check stretch rod alignment \u2014 the rod is likely not concentric with the preform axis. This overlaps with the Defect #2 stretch rod inspection procedure.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<p><!-- \u2500\u2500 DEFECT 06: TOP LOAD FAILURE \u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500 --><\/p>\n<section id=\"defect6\" style=\"margin-bottom: 80px;\">\n<div style=\"display: flex; align-items: center; gap: 14px; margin-bottom: 28px;\">\n<div style=\"background: #f97316; color: #fff; font-family: 'Barlow Condensed',sans-serif; font-size: 11px; font-weight: 900; letter-spacing: 2.5px; padding: 5px 12px; border-radius: 3px; text-transform: uppercase; flex-shrink: 0;\">06<\/div>\n<h2 style=\"font-family: 'Barlow Condensed',sans-serif; font-size: clamp(22px,3.5vw,34px); font-weight: 800; color: #0a1628; margin: 0; letter-spacing: -0.3px;\">Top Load Failure \u2014 Bottles Collapsing on the Filling Line<\/h2>\n<\/div>\n<div style=\"display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 24px;\">\n<div style=\"display: inline-flex; align-items: center; gap: 7px; background: #fef9f5; border: 1px solid #fed7aa; border-radius: 6px; padding: 7px 14px; font-size: 12px; font-weight: bold; color: #c2410c;\">Test Failure: Axial compression load below spec (typically &lt;150N for 500ml)<\/div>\n<div style=\"display: inline-flex; align-items: center; gap: 7px; background: #f0fdf4; border: 1px solid #bbf7d0; border-radius: 6px; padding: 7px 14px; font-size: 12px; font-weight: bold; color: #166534;\">Station Origin: Blow (orientation control)<\/div>\n<\/div>\n<p style=\"font-size: 16px; color: #374151; margin: 0 0 18px;\">Top load strength \u2014 the resistance of a bottle to axial compression \u2014 is the critical mechanical property for filling line performance. Bottles that fail top load testing will buckle under the weight of capping head pressure, conveyor accumulation, or pallet stacking loads. The minimum requirement for a standard 500ml PET bottle is typically \u2265150N, though CSD (carbonated soft drink) applications may specify \u2265200N.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-380 aligncenter\" src=\"https:\/\/isbmsolution.com\/wp-content\/uploads\/2026\/03\/Top-Load-Failure.webp\" alt=\"Top Load Failure\" width=\"800\" height=\"533\" \/><\/p>\n<p style=\"font-size: 16px; color: #374151; margin: 0 0 24px;\">Top load strength is almost entirely determined by the degree of biaxial molecular orientation achieved during stretch blowing. A well-oriented PET bottle derives its compressive strength from the molecular network \u2014 not from wall thickness. This means reducing weight will not necessarily cause top load failure if orientation is optimised, but <strong>poor orientation at any given wall thickness will consistently fail the test<\/strong>.<\/p>\n<div style=\"display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-bottom: 28px;\">\n<div style=\"background: #fff; border-radius: 10px; border: 1px solid #e2e8f0; padding: 22px; border-top: 4px solid #f97316;\">\n<div style=\"font-family: 'Barlow Condensed',sans-serif; font-size: 13px; font-weight: 900; letter-spacing: 2px; color: #f97316; text-transform: uppercase; margin-bottom: 14px;\">Root Causes<\/div>\n<ul style=\"margin: 0; padding: 0; list-style: none;\">\n<li style=\"padding: 8px 0; border-bottom: 1px solid #f1f5f9; font-size: 14px; color: #374151; padding-left: 18px; position: relative;\"><span style=\"position: absolute; left: 0; color: #f97316; font-weight: 800;\">\u2192<\/span>Axial stretch ratio below 2.5\u00d7 \u2014 insufficient chain alignment in vertical axis<\/li>\n<li style=\"padding: 8px 0; border-bottom: 1px solid #f1f5f9; font-size: 14px; color: #374151; padding-left: 18px; position: relative;\"><span style=\"position: absolute; left: 0; color: #f97316; font-weight: 800;\">\u2192<\/span>Hoop (radial) stretch ratio below 3.5\u00d7 \u2014 poor circumferential orientation<\/li>\n<li style=\"padding: 8px 0; border-bottom: 1px solid #f1f5f9; font-size: 14px; color: #374151; padding-left: 18px; position: relative;\"><span style=\"position: absolute; left: 0; color: #f97316; font-weight: 800;\">\u2192<\/span>Blow temperature too high \u2014 molecular orientation relaxes before freezing<\/li>\n<li style=\"padding: 8px 0; font-size: 14px; color: #374151; padding-left: 18px; position: relative;\"><span style=\"position: absolute; left: 0; color: #f97316; font-weight: 800;\">\u2192<\/span>Mould cooling insufficient \u2014 material releases from cavity wall too warm<\/li>\n<\/ul>\n<\/div>\n<div style=\"background: #fff; border-radius: 10px; border: 1px solid #e2e8f0; padding: 22px; border-top: 4px solid #0d2244;\">\n<div style=\"font-family: 'Barlow Condensed',sans-serif; font-size: 13px; font-weight: 900; letter-spacing: 2px; color: #0d2244; text-transform: uppercase; margin-bottom: 14px;\">Target Orientation Parameters<\/div>\n<div style=\"display: flex; flex-direction: column; gap: 8px;\">\n<div style=\"background: #f8fafc; border-radius: 6px; padding: 10px 12px; display: flex; justify-content: space-between; align-items: center;\"><span style=\"font-size: 13px; color: #475569;\">Axial stretch ratio<\/span><br \/>\n<span style=\"font-family: 'IBM Plex Mono',monospace; font-size: 13px; font-weight: 600; color: #0a1628;\">2.5\u20133.0\u00d7<\/span><\/div>\n<div style=\"background: #f8fafc; border-radius: 6px; padding: 10px 12px; display: flex; justify-content: space-between; align-items: center;\"><span style=\"font-size: 13px; color: #475569;\">Hoop (radial) stretch ratio<\/span><br \/>\n<span style=\"font-family: 'IBM Plex Mono',monospace; font-size: 13px; font-weight: 600; color: #0a1628;\">3.5\u20134.5\u00d7<\/span><\/div>\n<div style=\"background: #f8fafc; border-radius: 6px; padding: 10px 12px; display: flex; justify-content: space-between; align-items: center;\"><span style=\"font-size: 13px; color: #475569;\">Total BUR (biaxial) target<\/span><br \/>\n<span style=\"font-family: 'IBM Plex Mono',monospace; font-size: 13px; font-weight: 600; color: #0a1628;\">\u226510\u00d7<\/span><\/div>\n<div style=\"background: #f8fafc; border-radius: 6px; padding: 10px 12px; display: flex; justify-content: space-between; align-items: center;\"><span style=\"font-size: 13px; color: #475569;\">Mould cooling water max<\/span><br \/>\n<span style=\"font-family: 'IBM Plex Mono',monospace; font-size: 13px; font-weight: 600; color: #0a1628;\">\u226415\u00b0C<\/span><\/div>\n<\/div>\n<\/div>\n<\/div>\n<div style=\"background: #fff; border-radius: 10px; border: 1px solid #e2e8f0; padding: 24px;\">\n<div style=\"font-family: 'Barlow Condensed',sans-serif; font-size: 13px; font-weight: 900; letter-spacing: 2px; color: #0a1628; text-transform: uppercase; margin-bottom: 18px;\">Corrective Action Sequence<\/div>\n<div style=\"display: flex; flex-direction: column; gap: 10px;\">\n<div style=\"display: flex; gap: 14px; align-items: flex-start;\">\n<div style=\"flex-shrink: 0; width: 28px; height: 28px; background: #f97316; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-family: 'Barlow Condensed',sans-serif; font-size: 13px; font-weight: 900; color: #fff;\">1<\/div>\n<p style=\"font-size: 14px; color: #374151; margin: 0; padding-top: 4px;\">Calculate actual axial and hoop stretch ratios from preform dimensions and bottle cavity dimensions. If calculated BUR is below 10\u00d7, the preform-to-bottle size ratio is the fundamental design problem \u2014 not an adjustable process parameter. Consult the preform engineer.<\/p>\n<\/div>\n<div style=\"display: flex; gap: 14px; align-items: flex-start;\">\n<div style=\"flex-shrink: 0; width: 28px; height: 28px; background: #f97316; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-family: 'Barlow Condensed',sans-serif; font-size: 13px; font-weight: 900; color: #fff;\">2<\/div>\n<p style=\"font-size: 14px; color: #374151; margin: 0; padding-top: 4px;\">If calculated BUR is adequate, check mould cooling water temperature and flow rate. Insufficient cooling means bottles demould while still too warm, allowing orientation to partially relax. Target \u226415\u00b0C with verified flow rate at each mould circuit.<\/p>\n<\/div>\n<div style=\"display: flex; gap: 14px; align-items: flex-start;\">\n<div style=\"flex-shrink: 0; width: 28px; height: 28px; background: #f97316; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-family: 'Barlow Condensed',sans-serif; font-size: 13px; font-weight: 900; color: #fff;\">3<\/div>\n<p style=\"font-size: 14px; color: #374151; margin: 0; padding-top: 4px;\">Verify preform conditioning temperature is not too high. Over-heated preforms have reduced melt strength and lower natural stretch ratio, resulting in under-oriented bottles even at correct stretch parameters.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<p><!-- \u2500\u2500 DEFECT 07: BLISTERS \u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500 --><\/p>\n<section id=\"defect7\" style=\"margin-bottom: 80px;\">\n<div style=\"display: flex; align-items: center; gap: 14px; margin-bottom: 28px;\">\n<div style=\"background: #f97316; color: #fff; font-family: 'Barlow Condensed',sans-serif; font-size: 11px; font-weight: 900; letter-spacing: 2.5px; padding: 5px 12px; border-radius: 3px; text-transform: uppercase; flex-shrink: 0;\">07<\/div>\n<h2 style=\"font-family: 'Barlow Condensed',sans-serif; font-size: clamp(22px,3.5vw,34px); font-weight: 800; color: #0a1628; margin: 0; letter-spacing: -0.3px;\">Sidewall Bubbles &amp; Blisters \u2014 Diagnosing Moisture and Contamination<\/h2>\n<\/div>\n<div style=\"display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 24px;\">\n<div style=\"display: inline-flex; align-items: center; gap: 7px; background: #fef9f5; border: 1px solid #fed7aa; border-radius: 6px; padding: 7px 14px; font-size: 12px; font-weight: bold; color: #c2410c;\">Visual Symptom: Visible gas bubbles, blistering, or delamination in bottle sidewall<\/div>\n<div style=\"display: inline-flex; align-items: center; gap: 7px; background: #f0fdf4; border: 1px solid #bbf7d0; border-radius: 6px; padding: 7px 14px; font-size: 12px; font-weight: bold; color: #166534;\">Station Origin: Raw Material \/ Injection<\/div>\n<\/div>\n<p style=\"font-size: 16px; color: #374151; margin: 0 0 18px;\">Sidewall bubbles and blisters are among the most serious ISBM defects because they indicate a fundamental material integrity failure. Visible gas voids within the bottle wall are not a cosmetic issue \u2014 they represent zones of reduced wall thickness and compromised barrier performance. In pharmaceutical or food-grade applications, this defect triggers immediate product quarantine.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-381 aligncenter\" src=\"https:\/\/isbmsolution.com\/wp-content\/uploads\/2026\/03\/Sidewall-Bubbles-Blisters.webp\" alt=\"Sidewall Bubbles Blisters\" width=\"800\" height=\"533\" \/><\/p>\n<p><!-- Warning callout --><\/p>\n<div style=\"background: #fffbeb; border: 1px solid #fde68a; border-radius: 10px; padding: 20px 24px; margin-bottom: 24px; display: flex; gap: 16px; align-items: flex-start;\">\n<div style=\"flex-shrink: 0; font-size: 22px;\">\u26a0\ufe0f<\/div>\n<div>\n<div style=\"font-weight: 800; color: #92400e; font-size: 14px; margin-bottom: 4px;\">Primary Cause: PET Moisture Content<\/div>\n<p style=\"font-size: 14px; color: #78350f; margin: 0; line-height: 1.7;\">In over 90% of bubble\/blister cases, the root cause is PET resin moisture content exceeding 50 ppm at the point of injection. Water hydrolyses the PET ester bonds at processing temperatures (270\u2013295\u00b0C), generating CO\u2082 and acetaldehyde gas. These gases nucleate into bubbles during injection and remain visible in the final bottle. <strong>Always check moisture content before adjusting any machine parameter.<\/strong><\/p>\n<\/div>\n<\/div>\n<div style=\"display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-bottom: 28px;\">\n<div style=\"background: #fff; border-radius: 10px; border: 1px solid #e2e8f0; padding: 22px; border-top: 4px solid #f97316;\">\n<div style=\"font-family: 'Barlow Condensed',sans-serif; font-size: 13px; font-weight: 900; letter-spacing: 2px; color: #f97316; text-transform: uppercase; margin-bottom: 14px;\">Root Causes<\/div>\n<ul style=\"margin: 0; padding: 0; list-style: none;\">\n<li style=\"padding: 8px 0; border-bottom: 1px solid #f1f5f9; font-size: 14px; color: #374151; padding-left: 18px; position: relative;\"><span style=\"position: absolute; left: 0; color: #f97316; font-weight: 800;\">\u2192<\/span>PET moisture &gt;50 ppm \u2014 hydrolytic degradation at melt temperature<\/li>\n<li style=\"padding: 8px 0; border-bottom: 1px solid #f1f5f9; font-size: 14px; color: #374151; padding-left: 18px; position: relative;\"><span style=\"position: absolute; left: 0; color: #f97316; font-weight: 800;\">\u2192<\/span>Drying equipment malfunction \u2014 failed desiccant, blocked airflow<\/li>\n<li style=\"padding: 8px 0; border-bottom: 1px solid #f1f5f9; font-size: 14px; color: #374151; padding-left: 18px; position: relative;\"><span style=\"position: absolute; left: 0; color: #f97316; font-weight: 800;\">\u2192<\/span>Barrel temperature above 295\u00b0C \u2014 thermal degradation of PET chain<\/li>\n<li style=\"padding: 8px 0; font-size: 14px; color: #374151; padding-left: 18px; position: relative;\"><span style=\"position: absolute; left: 0; color: #f97316; font-weight: 800;\">\u2192<\/span>Resin contamination with foreign polymer or moisture-bearing additive<\/li>\n<\/ul>\n<\/div>\n<div style=\"background: #fff; border-radius: 10px; border: 1px solid #e2e8f0; padding: 22px; border-top: 4px solid #0d2244;\">\n<div style=\"font-family: 'Barlow Condensed',sans-serif; font-size: 13px; font-weight: 900; letter-spacing: 2px; color: #0d2244; text-transform: uppercase; margin-bottom: 14px;\">Critical Parameters<\/div>\n<div style=\"display: flex; flex-direction: column; gap: 8px;\">\n<div style=\"background: #fef2f2; border: 1px solid #fecaca; border-radius: 6px; padding: 10px 12px; display: flex; justify-content: space-between; align-items: center;\"><span style=\"font-size: 13px; color: #991b1b; font-weight: bold;\">PET moisture max<\/span><br \/>\n<span style=\"font-family: 'IBM Plex Mono',monospace; font-size: 13px; font-weight: bold; color: #991b1b;\">\u226450 ppm<\/span><\/div>\n<div style=\"background: #f8fafc; border-radius: 6px; padding: 10px 12px; display: flex; justify-content: space-between; align-items: center;\"><span style=\"font-size: 13px; color: #475569;\">Drying temp \/ time<\/span><br \/>\n<span style=\"font-family: 'IBM Plex Mono',monospace; font-size: 13px; font-weight: 600; color: #0a1628;\">160\u00b0C \/ \u22654h<\/span><\/div>\n<div style=\"background: #f8fafc; border-radius: 6px; padding: 10px 12px; display: flex; justify-content: space-between; align-items: center;\"><span style=\"font-size: 13px; color: #475569;\">Desiccant dew point<\/span><br \/>\n<span style=\"font-family: 'IBM Plex Mono',monospace; font-size: 13px; font-weight: 600; color: #0a1628;\">\u2264\u221240\u00b0C<\/span><\/div>\n<div style=\"background: #f8fafc; border-radius: 6px; padding: 10px 12px; display: flex; justify-content: space-between; align-items: center;\"><span style=\"font-size: 13px; color: #475569;\">Barrel temp maximum<\/span><br \/>\n<span style=\"font-family: 'IBM Plex Mono',monospace; font-size: 13px; font-weight: 600; color: #0a1628;\">\u2264295\u00b0C<\/span><\/div>\n<\/div>\n<\/div>\n<\/div>\n<div style=\"background: #fff; border-radius: 10px; border: 1px solid #e2e8f0; padding: 24px;\">\n<div style=\"font-family: 'Barlow Condensed',sans-serif; font-size: 13px; font-weight: 900; letter-spacing: 2px; color: #0a1628; text-transform: uppercase; margin-bottom: 18px;\">Corrective Action Sequence<\/div>\n<div style=\"display: flex; flex-direction: column; gap: 10px;\">\n<div style=\"display: flex; gap: 14px; align-items: flex-start;\">\n<div style=\"flex-shrink: 0; width: 28px; height: 28px; background: #f97316; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-family: 'Barlow Condensed',sans-serif; font-size: 13px; font-weight: 900; color: #fff;\">1<\/div>\n<p style=\"font-size: 14px; color: #374151; margin: 0; padding-top: 4px;\"><strong>Stop production immediately.<\/strong> Take a sample of resin directly from the hopper outlet and perform Karl Fischer moisture analysis. If result exceeds 50 ppm, the resin batch is the confirmed cause.<\/p>\n<\/div>\n<div style=\"display: flex; gap: 14px; align-items: flex-start;\">\n<div style=\"flex-shrink: 0; width: 28px; height: 28px; background: #f97316; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-family: 'Barlow Condensed',sans-serif; font-size: 13px; font-weight: 900; color: #fff;\">2<\/div>\n<p style=\"font-size: 14px; color: #374151; margin: 0; padding-top: 4px;\">Inspect drying system: verify desiccant dew point at hopper air inlet is \u2264\u221240\u00b0C. If dew point is drifting above \u221230\u00b0C, the desiccant beds are saturated and must be regenerated or replaced before production can restart.<\/p>\n<\/div>\n<div style=\"display: flex; gap: 14px; align-items: flex-start;\">\n<div style=\"flex-shrink: 0; width: 28px; height: 28px; background: #f97316; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-family: 'Barlow Condensed',sans-serif; font-size: 13px; font-weight: 900; color: #fff;\">3<\/div>\n<p style=\"font-size: 14px; color: #374151; margin: 0; padding-top: 4px;\">Purge the barrel with dried virgin PET before resuming. Check hopper sealing after extended shutdowns \u2014 moisture re-absorption can occur rapidly in humid environments if the hopper lid is left open.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<p><!-- \u2500\u2500 DEFECT 08: NECK DISTORTION \u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500 --><\/p>\n<section id=\"defect8\" style=\"margin-bottom: 80px;\">\n<div style=\"display: flex; align-items: center; gap: 14px; margin-bottom: 28px;\">\n<div style=\"background: #f97316; color: #fff; font-family: 'Barlow Condensed',sans-serif; font-size: 11px; font-weight: 900; letter-spacing: 2.5px; padding: 5px 12px; border-radius: 3px; text-transform: uppercase; flex-shrink: 0;\">08<\/div>\n<h2 style=\"font-family: 'Barlow Condensed',sans-serif; font-size: clamp(22px,3.5vw,34px); font-weight: 800; color: #0a1628; margin: 0; letter-spacing: -0.3px;\">Neck Finish Distortion \u2014 Out-of-Spec Thread Dimensions<\/h2>\n<\/div>\n<div style=\"display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 24px;\">\n<div style=\"display: inline-flex; align-items: center; gap: 7px; background: #fef9f5; border: 1px solid #fed7aa; border-radius: 6px; padding: 7px 14px; font-size: 12px; font-weight: bold; color: #c2410c;\">Test Failure: Cap fails go\/no-go gauge; sealing torque out of specification<\/div>\n<div style=\"display: inline-flex; align-items: center; gap: 7px; background: #f0fdf4; border: 1px solid #bbf7d0; border-radius: 6px; padding: 7px 14px; font-size: 12px; font-weight: bold; color: #166534;\">Station Origin: Injection + Blow (thermal \/ mechanical)<\/div>\n<\/div>\n<p style=\"font-size: 16px; color: #374151; margin: 0 0 18px;\">The neck finish is the only part of the bottle that does not undergo biaxial stretch \u2014 it must be dimensionally precise in its injected form and must remain dimensionally stable through the blow stage. Neck distortion manifests as out-of-round thread profiles, vertical dimension changes, or thread pitch variation that causes caps to fail torque or seal specifications.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-384 aligncenter\" src=\"https:\/\/isbmsolution.com\/wp-content\/uploads\/2026\/03\/Neck-Finish-Distortion.webp\" alt=\"Neck Finish Distortion\" width=\"800\" height=\"533\" \/><\/p>\n<p style=\"font-size: 16px; color: #374151; margin: 0 0 24px;\">In single-stage ISBM, the neck zone must be actively cooled and mechanically secured during the blow station. Any excess heat from the injection stage or any clamping insufficiency during blowing creates the conditions for distortion. Because the neck is the precision interface between bottle and closure, tolerances of \u00b10.1mm or tighter are typical for PCO and 28mm standard finishes.<\/p>\n<div style=\"display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-bottom: 28px;\">\n<div style=\"background: #fff; border-radius: 10px; border: 1px solid #e2e8f0; padding: 22px; border-top: 4px solid #f97316;\">\n<div style=\"font-family: 'Barlow Condensed',sans-serif; font-size: 13px; font-weight: 900; letter-spacing: 2px; color: #f97316; text-transform: uppercase; margin-bottom: 14px;\">Root Causes<\/div>\n<ul style=\"margin: 0; padding: 0; list-style: none;\">\n<li style=\"padding: 8px 0; border-bottom: 1px solid #f1f5f9; font-size: 14px; color: #374151; padding-left: 18px; position: relative;\"><span style=\"position: absolute; left: 0; color: #f97316; font-weight: 800;\">\u2192<\/span>Neck zone receives excessive residual heat from injection stage<\/li>\n<li style=\"padding: 8px 0; border-bottom: 1px solid #f1f5f9; font-size: 14px; color: #374151; padding-left: 18px; position: relative;\"><span style=\"position: absolute; left: 0; color: #f97316; font-weight: 800;\">\u2192<\/span>Neck cooling water circuit blocked or flow rate insufficient<\/li>\n<li style=\"padding: 8px 0; border-bottom: 1px solid #f1f5f9; font-size: 14px; color: #374151; padding-left: 18px; position: relative;\"><span style=\"position: absolute; left: 0; color: #f97316; font-weight: 800;\">\u2192<\/span>Clamping force during blow stage below specification<\/li>\n<li style=\"padding: 8px 0; font-size: 14px; color: #374151; padding-left: 18px; position: relative;\"><span style=\"position: absolute; left: 0; color: #f97316; font-weight: 800;\">\u2192<\/span>Neck insert wear \u2014 precision surfaces worn beyond tolerance<\/li>\n<\/ul>\n<\/div>\n<div style=\"background: #fff; border-radius: 10px; border: 1px solid #e2e8f0; padding: 22px; border-top: 4px solid #0d2244;\">\n<div style=\"font-family: 'Barlow Condensed',sans-serif; font-size: 13px; font-weight: 900; letter-spacing: 2px; color: #0d2244; text-transform: uppercase; margin-bottom: 14px;\">Key Parameters<\/div>\n<div style=\"display: flex; flex-direction: column; gap: 8px;\">\n<div style=\"background: #f8fafc; border-radius: 6px; padding: 10px 12px; display: flex; justify-content: space-between; align-items: center;\"><span style=\"font-size: 13px; color: #475569;\">Neck cooling circuit temp<\/span><br \/>\n<span style=\"font-family: 'IBM Plex Mono',monospace; font-size: 13px; font-weight: 600; color: #0a1628;\">\u226410\u00b0C (independent)<\/span><\/div>\n<div style=\"background: #f8fafc; border-radius: 6px; padding: 10px 12px; display: flex; justify-content: space-between; align-items: center;\"><span style=\"font-size: 13px; color: #475569;\">Mould clamp force<\/span><br \/>\n<span style=\"font-family: 'IBM Plex Mono',monospace; font-size: 13px; font-weight: 600; color: #0a1628;\">60\u2013120 kN<\/span><\/div>\n<div style=\"background: #f8fafc; border-radius: 6px; padding: 10px 12px; display: flex; justify-content: space-between; align-items: center;\"><span style=\"font-size: 13px; color: #475569;\">Neck roundness tolerance<\/span><br \/>\n<span style=\"font-family: 'IBM Plex Mono',monospace; font-size: 13px; font-weight: 600; color: #0a1628;\">\u22640.1mm ellipticity<\/span><\/div>\n<div style=\"background: #f8fafc; border-radius: 6px; padding: 10px 12px; display: flex; justify-content: space-between; align-items: center;\"><span style=\"font-size: 13px; color: #475569;\">Gauge check interval<\/span><br \/>\n<span style=\"font-family: 'IBM Plex Mono',monospace; font-size: 13px; font-weight: 600; color: #0a1628;\">Every 2h on line<\/span><\/div>\n<\/div>\n<\/div>\n<\/div>\n<div style=\"background: #fff; border-radius: 10px; border: 1px solid #e2e8f0; padding: 24px;\">\n<div style=\"font-family: 'Barlow Condensed',sans-serif; font-size: 13px; font-weight: 900; letter-spacing: 2px; color: #0a1628; text-transform: uppercase; margin-bottom: 18px;\">Corrective Action Sequence<\/div>\n<div style=\"display: flex; flex-direction: column; gap: 10px;\">\n<div style=\"display: flex; gap: 14px; align-items: flex-start;\">\n<div style=\"flex-shrink: 0; width: 28px; height: 28px; background: #f97316; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-family: 'Barlow Condensed',sans-serif; font-size: 13px; font-weight: 900; color: #fff;\">1<\/div>\n<p style=\"font-size: 14px; color: #374151; margin: 0; padding-top: 4px;\">Verify neck cooling circuit is independent from the main mould circuit and confirm inlet water temperature is \u226410\u00b0C. Measure temperature at circuit outlet \u2014 if outlet is significantly warmer than inlet, flow rate is insufficient. Increase cooling water flow to this circuit.<\/p>\n<\/div>\n<div style=\"display: flex; gap: 14px; align-items: flex-start;\">\n<div style=\"flex-shrink: 0; width: 28px; height: 28px; background: #f97316; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-family: 'Barlow Condensed',sans-serif; font-size: 13px; font-weight: 900; color: #fff;\">2<\/div>\n<p style=\"font-size: 14px; color: #374151; margin: 0; padding-top: 4px;\">Measure actual clamping force during blow using a calibrated force sensor or confirm machine display matches actual clamp tonnage. Low clamp force allows the neck insert to micro-displace during the P2 pressure phase.<\/p>\n<\/div>\n<div style=\"display: flex; gap: 14px; align-items: flex-start;\">\n<div style=\"flex-shrink: 0; width: 28px; height: 28px; background: #f97316; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-family: 'Barlow Condensed',sans-serif; font-size: 13px; font-weight: 900; color: #fff;\">3<\/div>\n<p style=\"font-size: 14px; color: #374151; margin: 0; padding-top: 4px;\">If dimensional issues persist after cooling and clamping corrections, check neck insert wear using precision gauging. Worn inserts must be replaced \u2014 they cannot be reworked. Track insert replacement intervals for preventive maintenance scheduling.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<p><!-- \u2500\u2500 MASTER CHECKLIST \u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500 --><\/p>\n<section id=\"checklist\" style=\"margin-bottom: 80px;\">\n<div style=\"display: flex; align-items: center; gap: 14px; margin-bottom: 28px;\">\n<div style=\"background: linear-gradient(135deg,#f97316,#facc15); color: #fff; font-family: 'Barlow Condensed',sans-serif; font-size: 11px; font-weight: 900; letter-spacing: 2.5px; padding: 5px 12px; border-radius: 3px; text-transform: uppercase; flex-shrink: 0;\">\u2b50<\/div>\n<h2 style=\"font-family: 'Barlow Condensed',sans-serif; font-size: clamp(22px,3.5vw,34px); font-weight: 800; color: #0a1628; margin: 0; letter-spacing: -0.3px;\">ISBM Defect Troubleshooting: Complete Operator Checklist<\/h2>\n<\/div>\n<p style=\"font-size: 16px; color: #374151; margin: 0 0 28px;\">This four-step sequence should be followed in order for any undiagnosed defect. Working upstream to downstream prevents the common error of adjusting blow parameters to compensate for an injection or material problem \u2014 an approach that delays resolution and risks compounding additional defects.<\/p>\n<p><!-- Step 1 --><\/p>\n<div style=\"background: #fff; border-radius: 12px; border: 1px solid #e2e8f0; overflow: hidden; margin-bottom: 16px;\">\n<div style=\"background: linear-gradient(90deg,#0a1628,#0d2244); padding: 16px 24px; display: flex; align-items: center; gap: 14px;\">\n<div style=\"flex-shrink: 0; width: 36px; height: 36px; background: #f97316; border-radius: 8px; display: flex; align-items: center; justify-content: center; font-family: 'Barlow Condensed',sans-serif; font-size: 18px; font-weight: 900; color: #fff;\">1<\/div>\n<div>\n<div style=\"font-family: 'Barlow Condensed',sans-serif; font-size: 18px; font-weight: 800; color: #fff; letter-spacing: 0.3px;\">Raw Material Check<\/div>\n<div style=\"font-size: 12px; color: #64748b;\">Verify before adjusting any machine parameter<\/div>\n<\/div>\n<\/div>\n<div style=\"padding: 20px 24px;\">\n<div style=\"display: grid; grid-template-columns: repeat(auto-fill,minmax(280px,1fr)); gap: 8px;\">\n<div style=\"display: flex; align-items: flex-start; gap: 10px; padding: 8px 12px; background: #f8fafc; border-radius: 6px; border: 1px solid #e2e8f0;\"><span style=\"font-size: 13px; color: #374151;\">PET moisture content <span style=\"font-family: 'IBM Plex Mono',monospace; font-weight: 600; color: #0a1628;\">\u226450 ppm<\/span> (Karl Fischer test)<\/span><\/div>\n<div style=\"display: flex; align-items: flex-start; gap: 10px; padding: 8px 12px; background: #f8fafc; border-radius: 6px; border: 1px solid #e2e8f0;\"><span style=\"font-size: 13px; color: #374151;\">IV value certificate confirmed <span style=\"font-family: 'IBM Plex Mono',monospace; font-weight: 600; color: #0a1628;\">\u22650.76 dL\/g<\/span><\/span><\/div>\n<div style=\"display: flex; align-items: flex-start; gap: 10px; padding: 8px 12px; background: #f8fafc; border-radius: 6px; border: 1px solid #e2e8f0;\"><span style=\"font-size: 13px; color: #374151;\">No mixed grades or contamination in hopper<\/span><\/div>\n<div style=\"display: flex; align-items: flex-start; gap: 10px; padding: 8px 12px; background: #f8fafc; border-radius: 6px; border: 1px solid #e2e8f0;\"><span style=\"font-size: 13px; color: #374151;\">Drying log confirmed: <span style=\"font-family: 'IBM Plex Mono',monospace; font-weight: 600; color: #0a1628;\">160\u00b0C \/ \u22654h<\/span><\/span><\/div>\n<div style=\"display: flex; align-items: flex-start; gap: 10px; padding: 8px 12px; background: #f8fafc; border-radius: 6px; border: 1px solid #e2e8f0;\"><span style=\"font-size: 13px; color: #374151;\">Desiccant dew point at outlet <span style=\"font-family: 'IBM Plex Mono',monospace; font-weight: 600; color: #0a1628;\">\u2264\u221240\u00b0C<\/span><\/span><\/div>\n<div style=\"display: flex; align-items: flex-start; gap: 10px; padding: 8px 12px; background: #f8fafc; border-radius: 6px; border: 1px solid #e2e8f0;\"><span style=\"font-size: 13px; color: #374151;\">Hopper sealed \u2014 no moisture re-absorption after drying<\/span><\/div>\n<\/div>\n<\/div>\n<\/div>\n<p><!-- Step 2 --><\/p>\n<div style=\"background: #fff; border-radius: 12px; border: 1px solid #e2e8f0; overflow: hidden; margin-bottom: 16px;\">\n<div style=\"background: linear-gradient(90deg,#0a1628,#0d2244); padding: 16px 24px; display: flex; align-items: center; gap: 14px;\">\n<div style=\"flex-shrink: 0; width: 36px; height: 36px; background: #f97316; border-radius: 8px; display: flex; align-items: center; justify-content: center; font-family: 'Barlow Condensed',sans-serif; font-size: 18px; font-weight: 900; color: #fff;\">2<\/div>\n<div>\n<div style=\"font-family: 'Barlow Condensed',sans-serif; font-size: 18px; font-weight: 800; color: #fff; letter-spacing: 0.3px;\">Injection Process Check<\/div>\n<div style=\"font-size: 12px; color: #64748b;\">Melt quality and preform formation parameters<\/div>\n<\/div>\n<\/div>\n<div style=\"padding: 20px 24px;\">\n<div style=\"display: grid; grid-template-columns: repeat(auto-fill,minmax(280px,1fr)); gap: 8px;\">\n<div style=\"display: flex; align-items: flex-start; gap: 10px; padding: 8px 12px; background: #f8fafc; border-radius: 6px; border: 1px solid #e2e8f0;\"><span style=\"font-size: 13px; color: #374151;\">Melt temperature <span style=\"font-family: 'IBM Plex Mono',monospace; font-weight: 600; color: #0a1628;\">270\u2013285\u00b0C<\/span><\/span><\/div>\n<div style=\"display: flex; align-items: flex-start; gap: 10px; padding: 8px 12px; background: #f8fafc; border-radius: 6px; border: 1px solid #e2e8f0;\"><span style=\"font-size: 13px; color: #374151;\">Barrel maximum not exceeding <span style=\"font-family: 'IBM Plex Mono',monospace; font-weight: 600; color: #0a1628;\">295\u00b0C<\/span><\/span><\/div>\n<div style=\"display: flex; align-items: flex-start; gap: 10px; padding: 8px 12px; background: #f8fafc; border-radius: 6px; border: 1px solid #e2e8f0;\"><span style=\"font-size: 13px; color: #374151;\">Stage 1 injection speed <span style=\"font-family: 'IBM Plex Mono',monospace; font-weight: 600; color: #0a1628;\">\u226430 mm\/s<\/span><\/span><\/div>\n<div style=\"display: flex; align-items: flex-start; gap: 10px; padding: 8px 12px; background: #f8fafc; border-radius: 6px; border: 1px solid #e2e8f0;\"><span style=\"font-size: 13px; color: #374151;\">Hold pressure time <span style=\"font-family: 'IBM Plex Mono',monospace; font-weight: 600; color: #0a1628;\">1.5\u20133.0 s<\/span><\/span><\/div>\n<div style=\"display: flex; align-items: flex-start; gap: 10px; padding: 8px 12px; background: #f8fafc; border-radius: 6px; border: 1px solid #e2e8f0;\"><span style=\"font-size: 13px; color: #374151;\">Hot runner zone temp balance <span style=\"font-family: 'IBM Plex Mono',monospace; font-weight: 600; color: #0a1628;\">\u00b12\u00b0C<\/span><\/span><\/div>\n<div style=\"display: flex; align-items: flex-start; gap: 10px; padding: 8px 12px; background: #f8fafc; border-radius: 6px; border: 1px solid #e2e8f0;\"><span style=\"font-size: 13px; color: #374151;\">Cooling time: preform core temp <span style=\"font-family: 'IBM Plex Mono',monospace; font-weight: 600; color: #0a1628;\">\u226460\u00b0C<\/span> at ejection<\/span><\/div>\n<div style=\"display: flex; align-items: flex-start; gap: 10px; padding: 8px 12px; background: #f8fafc; border-radius: 6px; border: 1px solid #e2e8f0;\"><span style=\"font-size: 13px; color: #374151;\">Preform 4-point wall eccentricity <span style=\"font-family: 'IBM Plex Mono',monospace; font-weight: 600; color: #0a1628;\">\u22640.05 mm<\/span><\/span><\/div>\n<div style=\"display: flex; align-items: flex-start; gap: 10px; padding: 8px 12px; background: #f8fafc; border-radius: 6px; border: 1px solid #e2e8f0;\"><span style=\"font-size: 13px; color: #374151;\">Gate tip condition \u2014 no wear or partial blockage visible<\/span><\/div>\n<\/div>\n<\/div>\n<\/div>\n<p><!-- Step 3 --><\/p>\n<div style=\"background: #fff; border-radius: 12px; border: 1px solid #e2e8f0; overflow: hidden; margin-bottom: 16px;\">\n<div style=\"background: linear-gradient(90deg,#0a1628,#0d2244); padding: 16px 24px; display: flex; align-items: center; gap: 14px;\">\n<div style=\"flex-shrink: 0; width: 36px; height: 36px; background: #f97316; border-radius: 8px; display: flex; align-items: center; justify-content: center; font-family: 'Barlow Condensed',sans-serif; font-size: 18px; font-weight: 900; color: #fff;\">3<\/div>\n<div>\n<div style=\"font-family: 'Barlow Condensed',sans-serif; font-size: 18px; font-weight: 800; color: #fff; letter-spacing: 0.3px;\">Stretch-Blow Process Check<\/div>\n<div style=\"font-size: 12px; color: #64748b;\">Conditioning, pressure, and stretch mechanics<\/div>\n<\/div>\n<\/div>\n<div style=\"padding: 20px 24px;\">\n<div style=\"display: grid; grid-template-columns: repeat(auto-fill,minmax(280px,1fr)); gap: 8px;\">\n<div style=\"display: flex; align-items: flex-start; gap: 10px; padding: 8px 12px; background: #f8fafc; border-radius: 6px; border: 1px solid #e2e8f0;\"><span style=\"font-size: 13px; color: #374151;\">Preform blow-station temp <span style=\"font-family: 'IBM Plex Mono',monospace; font-weight: 600; color: #0a1628;\">95\u2013115\u00b0C<\/span> (IR gun)<\/span><\/div>\n<div style=\"display: flex; align-items: flex-start; gap: 10px; padding: 8px 12px; background: #f8fafc; border-radius: 6px; border: 1px solid #e2e8f0;\"><span style=\"font-size: 13px; color: #374151;\">Pre-blow pressure P1 <span style=\"font-family: 'IBM Plex Mono',monospace; font-weight: 600; color: #0a1628;\">8\u201312 bar<\/span><\/span><\/div>\n<div style=\"display: flex; align-items: flex-start; gap: 10px; padding: 8px 12px; background: #f8fafc; border-radius: 6px; border: 1px solid #e2e8f0;\"><span style=\"font-size: 13px; color: #374151;\">High-blow pressure P2 <span style=\"font-family: 'IBM Plex Mono',monospace; font-weight: 600; color: #0a1628;\">35\u201340 bar<\/span> at mould inlet<\/span><\/div>\n<div style=\"display: flex; align-items: flex-start; gap: 10px; padding: 8px 12px; background: #f8fafc; border-radius: 6px; border: 1px solid #e2e8f0;\"><span style=\"font-size: 13px; color: #374151;\">High-blow time <span style=\"font-family: 'IBM Plex Mono',monospace; font-weight: 600; color: #0a1628;\">\u22650.3 s<\/span><\/span><\/div>\n<div style=\"display: flex; align-items: flex-start; gap: 10px; padding: 8px 12px; background: #f8fafc; border-radius: 6px; border: 1px solid #e2e8f0;\"><span style=\"font-size: 13px; color: #374151;\">Stretch rod speed <span style=\"font-family: 'IBM Plex Mono',monospace; font-weight: 600; color: #0a1628;\">1.0\u20131.5 m\/s<\/span><\/span><\/div>\n<div style=\"display: flex; align-items: flex-start; gap: 10px; padding: 8px 12px; background: #f8fafc; border-radius: 6px; border: 1px solid #e2e8f0;\"><span style=\"font-size: 13px; color: #374151;\">Stretch rod end position within <span style=\"font-family: 'IBM Plex Mono',monospace; font-weight: 600; color: #0a1628;\">\u00b10.5 mm<\/span> of spec<\/span><\/div>\n<div style=\"display: flex; align-items: flex-start; gap: 10px; padding: 8px 12px; background: #f8fafc; border-radius: 6px; border: 1px solid #e2e8f0;\"><span style=\"font-size: 13px; color: #374151;\">Axial stretch ratio confirmed <span style=\"font-family: 'IBM Plex Mono',monospace; font-weight: 600; color: #0a1628;\">2.5\u20133.0\u00d7<\/span><\/span><\/div>\n<div style=\"display: flex; align-items: flex-start; gap: 10px; padding: 8px 12px; background: #f8fafc; border-radius: 6px; border: 1px solid #e2e8f0;\"><span style=\"font-size: 13px; color: #374151;\">Total BUR (biaxial) confirmed <span style=\"font-family: 'IBM Plex Mono',monospace; font-weight: 600; color: #0a1628;\">\u226510\u00d7<\/span><\/span><\/div>\n<\/div>\n<\/div>\n<\/div>\n<p><!-- Step 4 --><\/p>\n<div style=\"background: #fff; border-radius: 12px; border: 1px solid #e2e8f0; overflow: hidden; margin-bottom: 16px;\">\n<div style=\"background: linear-gradient(90deg,#0a1628,#0d2244); padding: 16px 24px; display: flex; align-items: center; gap: 14px;\">\n<div style=\"flex-shrink: 0; width: 36px; height: 36px; background: #f97316; border-radius: 8px; display: flex; align-items: center; justify-content: center; font-family: 'Barlow Condensed',sans-serif; font-size: 18px; font-weight: 900; color: #fff;\">4<\/div>\n<div>\n<div style=\"font-family: 'Barlow Condensed',sans-serif; font-size: 18px; font-weight: 800; color: #fff; letter-spacing: 0.3px;\">Mould &amp; Machine Check<\/div>\n<div style=\"font-size: 12px; color: #64748b;\">Tooling condition and mechanical systems<\/div>\n<\/div>\n<\/div>\n<div style=\"padding: 20px 24px;\">\n<div style=\"display: grid; grid-template-columns: repeat(auto-fill,minmax(280px,1fr)); gap: 8px;\">\n<div style=\"display: flex; align-items: flex-start; gap: 10px; padding: 8px 12px; background: #f8fafc; border-radius: 6px; border: 1px solid #e2e8f0;\"><span style=\"font-size: 13px; color: #374151;\">Mould cooling water <span style=\"font-family: 'IBM Plex Mono',monospace; font-weight: 600; color: #0a1628;\">10\u201315\u00b0C<\/span>, confirmed flow at each circuit<\/span><\/div>\n<div style=\"display: flex; align-items: flex-start; gap: 10px; padding: 8px 12px; background: #f8fafc; border-radius: 6px; border: 1px solid #e2e8f0;\"><span style=\"font-size: 13px; color: #374151;\">Neck cooling circuit independent, <span style=\"font-family: 'IBM Plex Mono',monospace; font-weight: 600; color: #0a1628;\">\u226410\u00b0C<\/span><\/span><\/div>\n<div style=\"display: flex; align-items: flex-start; gap: 10px; padding: 8px 12px; background: #f8fafc; border-radius: 6px; border: 1px solid #e2e8f0;\"><span style=\"font-size: 13px; color: #374151;\">Stretch rod TIR (run-out) <span style=\"font-family: 'IBM Plex Mono',monospace; font-weight: 600; color: #0a1628;\">\u22640.1 mm<\/span><\/span><\/div>\n<div style=\"display: flex; align-items: flex-start; gap: 10px; padding: 8px 12px; background: #f8fafc; border-radius: 6px; border: 1px solid #e2e8f0;\"><span style=\"font-size: 13px; color: #374151;\">Mould vent slots clear \u2014 depth <span style=\"font-family: 'IBM Plex Mono',monospace; font-weight: 600; color: #0a1628;\">0.03\u20130.05 mm<\/span><\/span><\/div>\n<div style=\"display: flex; align-items: flex-start; gap: 10px; padding: 8px 12px; background: #f8fafc; border-radius: 6px; border: 1px solid #e2e8f0;\"><span style=\"font-size: 13px; color: #374151;\">Clamp force within machine spec <span style=\"font-family: 'IBM Plex Mono',monospace; font-weight: 600; color: #0a1628;\">60\u2013120 kN<\/span><\/span><\/div>\n<div style=\"display: flex; align-items: flex-start; gap: 10px; padding: 8px 12px; background: #f8fafc; border-radius: 6px; border: 1px solid #e2e8f0;\"><span style=\"font-size: 13px; color: #374151;\">Neck insert \u2014 gauge check ellipticity <span style=\"font-family: 'IBM Plex Mono',monospace; font-weight: 600; color: #0a1628;\">\u22640.1 mm<\/span><\/span><\/div>\n<div style=\"display: flex; align-items: flex-start; gap: 10px; padding: 8px 12px; background: #f8fafc; border-radius: 6px; border: 1px solid #e2e8f0;\"><span style=\"font-size: 13px; color: #374151;\">Cavity locating pins \u2014 confirm preform seat is concentric<\/span><\/div>\n<div style=\"display: flex; align-items: flex-start; gap: 10px; padding: 8px 12px; background: #f8fafc; border-radius: 6px; border: 1px solid #e2e8f0;\"><span style=\"font-size: 13px; color: #374151;\">Tie bar load balance \u2014 check with load cell if available<\/span><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-208 aligncenter\" src=\"https:\/\/isbmsolution.com\/wp-content\/uploads\/2026\/02\/company-factory.webp\" alt=\"\u5c04\u51fa\u5ef6\u4f38\u30d6\u30ed\u30fc\u6210\u5f62\u6a5f\u30e1\u30fc\u30ab\u30fc\" width=\"1001\" height=\"341\" srcset=\"https:\/\/isbmsolution.com\/wp-content\/uploads\/2026\/02\/company-factory.webp 1001w, https:\/\/isbmsolution.com\/wp-content\/uploads\/2026\/02\/company-factory-980x334.webp 980w, https:\/\/isbmsolution.com\/wp-content\/uploads\/2026\/02\/company-factory-480x164.webp 480w\" sizes=\"(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) and (max-width: 980px) 980px, (min-width: 981px) 1001px, 100vw\" \/><!-- \u2500\u2500 WHEN TO CALL ENGINEER \u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500 --><\/p>\n<section id=\"escalation\" style=\"margin-bottom: 80px;\">\n<div style=\"display: flex; align-items: center; gap: 14px; margin-bottom: 28px;\">\n<div style=\"background: #f97316; color: #fff; font-family: 'Barlow Condensed',sans-serif; font-size: 11px; font-weight: 900; letter-spacing: 2.5px; padding: 5px 12px; border-radius: 3px; text-transform: uppercase; flex-shrink: 0;\">09<\/div>\n<h2 style=\"font-family: 'Barlow Condensed',sans-serif; font-size: clamp(22px,3.5vw,34px); font-weight: 800; color: #0a1628; margin: 0; letter-spacing: -0.3px;\">When Process Adjustment Isn&#8217;t Enough<\/h2>\n<\/div>\n<p style=\"font-size: 16px; color: #374151; margin: 0 0 24px;\">The four-step checklist resolves the majority of ISBM defects. However, a subset of recurring or complex failure patterns requires escalation beyond operator-level adjustment. The following conditions indicate that tooling, machine hardware, or process design \u2014 rather than parameter settings \u2014 are the root cause:<\/p>\n<div style=\"display: grid; grid-template-columns: repeat(auto-fit,minmax(260px,1fr)); gap: 16px; margin-bottom: 36px;\">\n<div style=\"background: #fff; border-radius: 10px; border: 1px solid #e2e8f0; padding: 22px; border-left: 4px solid #ef4444;\">\n<div style=\"font-family: 'Barlow Condensed',sans-serif; font-size: 14px; font-weight: 900; color: #ef4444; letter-spacing: 1px; text-transform: uppercase; margin-bottom: 10px;\">Escalate to Tool Engineer<\/div>\n<ul style=\"margin: 0; padding: 0 0 0 16px; font-size: 14px; color: #374151; line-height: 1.8;\">\n<li>Defect persists after complete 4-step checklist<\/li>\n<li>Preform wall eccentricity cannot be corrected by hot runner tuning<\/li>\n<li>Neck distortion recurs despite cooling and clamp correction<\/li>\n<li>Gate blush remains after all injection velocity adjustments<\/li>\n<\/ul>\n<\/div>\n<div style=\"background: #fff; border-radius: 10px; border: 1px solid #e2e8f0; padding: 22px; border-left: 4px solid #f97316;\">\n<div style=\"font-family: 'Barlow Condensed',sans-serif; font-size: 14px; font-weight: 900; color: #f97316; letter-spacing: 1px; text-transform: uppercase; margin-bottom: 10px;\">Escalate to Machine Supplier<\/div>\n<ul style=\"margin: 0; padding: 0 0 0 16px; font-size: 14px; color: #374151; line-height: 1.8;\">\n<li>Multiple defects appearing simultaneously on the same cycle<\/li>\n<li>Top load failure that cannot be resolved by orientation optimisation<\/li>\n<li>Cycle-to-cycle variability in wall thickness with no identifiable cause<\/li>\n<li>Temperature control instability across conditioning zones<\/li>\n<\/ul>\n<\/div>\n<div style=\"background: #fff; border-radius: 10px; border: 1px solid #e2e8f0; padding: 22px; border-left: 4px solid #0d2244;\">\n<div style=\"font-family: 'Barlow Condensed',sans-serif; font-size: 14px; font-weight: 900; color: #0d2244; letter-spacing: 1px; text-transform: uppercase; margin-bottom: 10px;\">Escalate to Resin Supplier<\/div>\n<ul style=\"margin: 0; padding: 0 0 0 16px; font-size: 14px; color: #374151; line-height: 1.8;\">\n<li>Moisture or IV issues confirmed across multiple batches<\/li>\n<li>Pearlescence occurs despite confirmed correct drying and temperature<\/li>\n<li>Unexpected colour shift, acetaldehyde odour, or rapid IV degradation<\/li>\n<li>New resin grade transition requiring process window redetermination<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<p><!-- CTA --><\/p>\n<div style=\"background: linear-gradient(135deg,#0a1628,#0d2244); border-radius: 12px; padding: 36px 32px; text-align: center;\">\n<div style=\"font-family: 'Barlow Condensed',sans-serif; font-size: 28px; font-weight: 900; color: #fff; margin-bottom: 10px; line-height: 1.2;\">Evaluating a New ISBM Machine?<\/div>\n<p style=\"font-size: 15px; color: #94a3b8; max-width: 560px; margin: 0 auto 24px; line-height: 1.8;\">ISBM Solution&#8217;s engineering team can provide process simulation, defect risk analysis, and application-specific parameter recommendations before machine selection \u2014 reducing commissioning time and defect-related waste from day one.<\/p>\n<p><a style=\"display: inline-block; background: linear-gradient(135deg,#f97316,#ea6c05); color: #fff; font-family: 'Barlow Condensed',sans-serif; font-size: 15px; font-weight: 800; letter-spacing: 1px; text-decoration: none; padding: 14px 32px; border-radius: 6px; text-transform: uppercase;\" href=\"https:\/\/isbmsolution.com\/ja\/contact\/\">Request a Technical Consultation \u2192<\/a><\/p>\n<\/div>\n<\/section>\n<p><!-- \u2500\u2500 FAQ \u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500 --><\/p>\n<section id=\"faq\" style=\"margin-bottom: 40px;\">\n<div style=\"display: flex; align-items: center; gap: 14px; margin-bottom: 28px;\">\n<div style=\"background: #f97316; color: #fff; font-family: 'Barlow Condensed',sans-serif; font-size: 11px; font-weight: 900; letter-spacing: 2.5px; padding: 5px 12px; border-radius: 3px; text-transform: uppercase; flex-shrink: 0;\">10<\/div>\n<h2 style=\"font-family: 'Barlow Condensed',sans-serif; font-size: clamp(22px,3.5vw,34px); font-weight: 800; color: #0a1628; margin: 0; letter-spacing: -0.3px;\">\u3088\u304f\u3042\u308b\u8cea\u554f<\/h2>\n<\/div>\n<div style=\"display: flex; flex-direction: column; gap: 12px;\">\n<div style=\"background: #fff; border-radius: 10px; border: 1px solid #e2e8f0; overflow: hidden;\">\n<div style=\"padding: 20px 24px; border-left: 4px solid #f97316;\">\n<h3 style=\"font-family: 'Barlow Condensed',sans-serif; font-size: 18px; font-weight: 800; color: #0a1628; margin: 0 0 10px;\">What is the most common defect in injection stretch blow molding?<\/h3>\n<p style=\"font-size: 15px; color: #374151; margin: 0; line-height: 1.8;\">Pearlescence (haze) is the most frequently reported ISBM defect in PET bottle production. It accounts for the majority of first-run failures during new product commissioning and new material batch changes. The cause is almost always related to either insufficient preform temperature at the blow station (below 95\u00b0C) or PET resin that has not been adequately dried \u2014 allowing residual moisture to accelerate crystallisation during stretching.<\/p>\n<\/div>\n<\/div>\n<div style=\"background: #fff; border-radius: 10px; border: 1px solid #e2e8f0; overflow: hidden;\">\n<div style=\"padding: 20px 24px; border-left: 4px solid #f97316;\">\n<h3 style=\"font-family: 'Barlow Condensed',sans-serif; font-size: 18px; font-weight: 800; color: #0a1628; margin: 0 0 10px;\">How do I fix pearlescence in PET bottles?<\/h3>\n<p style=\"font-size: 15px; color: #374151; margin: 0; line-height: 1.8;\">First, use an IR thermometer to confirm the preform surface temperature at the blow station is within 95\u2013115\u00b0C. If below this range, raise conditioning heater temperature 2\u00b0C per cycle and recheck. If temperature is confirmed correct, take a Karl Fischer moisture sample directly from the hopper outlet. Moisture above 50 ppm requires drying system inspection \u2014 verify desiccant dew point is \u2264\u221240\u00b0C at the hopper inlet. If both temperature and moisture are within specification and pearlescence persists, request an IV value certificate from the resin supplier; values below 0.76 dL\/g require a material change.<\/p>\n<\/div>\n<\/div>\n<div style=\"background: #fff; border-radius: 10px; border: 1px solid #e2e8f0; overflow: hidden;\">\n<div style=\"padding: 20px 24px; border-left: 4px solid #f97316;\">\n<h3 style=\"font-family: 'Barlow Condensed',sans-serif; font-size: 18px; font-weight: 800; color: #0a1628; margin: 0 0 10px;\">What causes wall thickness variation in ISBM bottles?<\/h3>\n<p style=\"font-size: 15px; color: #374151; margin: 0; line-height: 1.8;\">Wall thickness variation in ISBM has two distinct origins and must be diagnosed before any corrective action is taken. First, measure the preform wall at 0\u00b0, 90\u00b0, 180\u00b0, and 270\u00b0 using an ultrasonic gauge. If the preform itself is eccentric (greater than 0.05mm deviation), the problem is an injection tool issue \u2014 typically a hot runner zone temperature imbalance or a blocked gate tip. If the preform is symmetric, the problem is mechanical \u2014 typically a worn or eccentric stretch rod with TIR exceeding 0.1mm. These two causes require completely different corrective actions and cannot be resolved by adjusting blow parameters.<\/p>\n<\/div>\n<\/div>\n<div style=\"background: #fff; border-radius: 10px; border: 1px solid #e2e8f0; overflow: hidden;\">\n<div style=\"padding: 20px 24px; border-left: 4px solid #f97316;\">\n<h3 style=\"font-family: 'Barlow Condensed',sans-serif; font-size: 18px; font-weight: 800; color: #0a1628; margin: 0 0 10px;\">Why are my ISBM bottles failing top load tests?<\/h3>\n<p style=\"font-size: 15px; color: #374151; margin: 0; line-height: 1.8;\">Top load failure in PET bottles is primarily a biaxial orientation problem, not a wall thickness problem. Calculate your actual axial stretch ratio (preform length to bottle length) and hoop stretch ratio (preform OD to bottle OD). If the combined biaxial stretch ratio (BUR) is below 10\u00d7, the preform design is fundamentally unsuitable for the target bottle volume \u2014 this requires a preform redesign, not process adjustment. If BUR is correct, check mould cooling water temperature: bottles demoulded above 15\u00b0C have partially relaxed molecular orientation, directly reducing compressive strength. Also verify preform conditioning temperature is not above 115\u00b0C, as over-heated preforms have reduced natural stretch resistance.<\/p>\n<\/div>\n<\/div>\n<div style=\"background: #fff; border-radius: 10px; border: 1px solid #e2e8f0; overflow: hidden;\">\n<div style=\"padding: 20px 24px; border-left: 4px solid #f97316;\">\n<h3 style=\"font-family: 'Barlow Condensed',sans-serif; font-size: 18px; font-weight: 800; color: #0a1628; margin: 0 0 10px;\">What PET moisture content is required for stretch blow molding?<\/h3>\n<p style=\"font-size: 15px; color: #374151; margin: 0; line-height: 1.8;\">PET resin must be dried to a moisture content of 50 ppm or below (measured by Karl Fischer titration) before injection in ISBM processing. Above 50 ppm, water molecules hydrolyse PET ester bonds at barrel temperatures of 270\u2013295\u00b0C, generating CO\u2082 gas that forms visible bubbles in the bottle wall. They also degrade the polymer chain, reducing IV value and increasing acetaldehyde formation. The standard drying protocol is 160\u00b0C for a minimum of 4 hours in a desiccant dryer with a dew point of \u2264\u221240\u00b0C at the hopper air inlet. Desiccant beds should be regenerated on schedule and dew point should be monitored continuously during production.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/section>","protected":false},"excerpt":{"rendered":"<p>00 \u00b7 Overview 01 \u00b7 Pearlescence 02 \u00b7 Wall Variation 03 \u00b7 Gate Blush 04 \u00b7 Short Shot 05 \u00b7 Base Peaking 06 \u00b7 Top Load 07 \u00b7 Blisters 08 \u00b7 Neck Distortion \u2b50 Master Checklist FAQ &nbsp; 00 Why ISBM Defects Are Harder to Diagnose Than SBM In a two-stage reheat stretch blow molding process, the preform is manufactured separately and reheated before blowing. This separation means injection problems and blowing problems have distinct, traceable origins. In single-stage ISBM, there is no such boundary. The preform goes directly from injection to conditioning to stretch-blow within a single continuous cycle \u2014 meaning a melt temperature set 5\u00b0C too high at [&hellip;]<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[22],"tags":[23],"class_list":["post-378","post","type-post","status-publish","format-standard","hentry","category-injection-stretch-blow-molding-machine","tag-injection-stretch-blow-molding-machine"],"_links":{"self":[{"href":"https:\/\/isbmsolution.com\/ja\/wp-json\/wp\/v2\/posts\/378","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/isbmsolution.com\/ja\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/isbmsolution.com\/ja\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/isbmsolution.com\/ja\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/isbmsolution.com\/ja\/wp-json\/wp\/v2\/comments?post=378"}],"version-history":[{"count":2,"href":"https:\/\/isbmsolution.com\/ja\/wp-json\/wp\/v2\/posts\/378\/revisions"}],"predecessor-version":[{"id":388,"href":"https:\/\/isbmsolution.com\/ja\/wp-json\/wp\/v2\/posts\/378\/revisions\/388"}],"wp:attachment":[{"href":"https:\/\/isbmsolution.com\/ja\/wp-json\/wp\/v2\/media?parent=378"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/isbmsolution.com\/ja\/wp-json\/wp\/v2\/categories?post=378"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/isbmsolution.com\/ja\/wp-json\/wp\/v2\/tags?post=378"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}