{"id":176,"date":"2026-07-15T07:55:10","date_gmt":"2026-07-15T07:55:10","guid":{"rendered":"https:\/\/onestepblowmoldingmachine.com\/what-materials-can-be-processed-on-an-isbm-machine\/"},"modified":"2026-07-15T07:55:10","modified_gmt":"2026-07-15T07:55:10","slug":"what-materials-can-be-processed-on-an-isbm-machine","status":"publish","type":"post","link":"https:\/\/onestepblowmoldingmachine.com\/zh\/what-materials-can-be-processed-on-an-isbm-machine\/","title":{"rendered":"What Materials Can Be Processed on an ISBM Machine?"},"content":{"rendered":"<nav aria-label=\"\u9762\u5305\u5c51\" style=\"margin-bottom:18px;font-size:13px;color:#666;\"><a href=\"\/zh\/\" style=\"color:#0066cc;text-decoration:none;\">\u5bb6<\/a> &rsaquo; <a href=\"\/zh\/products\/isbm-machines\/\" style=\"color:#0066cc;text-decoration:none;\">ISBM\u673a\u5668<\/a> &rsaquo; <span>What Materials Can Be Processed on an ISBM Machine<\/span><\/nav>\n<h2 style=\"font-size:28px;color:#1a2e44;margin-bottom:10px;\">What Materials Can Be Processed on an ISBM Machine?<\/h2>\n<p style=\"font-size:16px;line-height:1.8;color:#333;margin-bottom:24px;\">The question of material compatibility is fundamental to any ISBM machine investment. Unlike extrusion blow molding which can process a wide variety of thermoplastics, injection stretch blow molding is limited to polymers that can both be injection-molded precisely and then biaxially oriented within a defined temperature window. Not every thermoplastic meets these dual requirements.<\/p>\n<p style=\"font-size:16px;line-height:1.8;color:#333;margin-bottom:24px;\">This guide covers in depth the three commercially dominant materials for ISBM \u2014 PET, PP, and PETG \u2014 plus emerging alternatives, explaining the polymer science behind their suitability, how their processing requirements differ, what containers they are best suited for, and the practical differences operators experience on the machine floor.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/onestepblowmoldingmachine.com\/wp-content\/uploads\/2026\/07\/isbm-machine-4.webp\" alt=\"ISBM machine processing PET PP and PETG resins for injection stretch blow molded container production\" style=\"width:100%;max-width:100%;height:auto;border-radius:8px;margin-bottom:28px;display:block;\" \/><\/p>\n<h2 style=\"font-size:24px;color:#1a2e44;border-left:4px solid #0066cc;padding-left:12px;margin-top:36px;\">Why Not All Plastics Can Be Stretch-Blow Molded<\/h2>\n<p style=\"font-size:16px;line-height:1.8;color:#333;margin-bottom:16px;\">Stretch blow molding requires a very specific rheological behaviour: the polymer must remain in a highly viscous, rubbery state at the stretch-blow temperature \u2014 mobile enough to deform under mechanical and pneumatic force, but resistant enough to maintain thickness distribution and not tear. This behaviour is only possible when the processing temperature is above the glass transition temperature (Tg) but below the crystallisation or melt temperature.<\/p>\n<p style=\"font-size:16px;line-height:1.8;color:#333;margin-bottom:16px;\">Additionally, for ISBM to deliver its defining advantage \u2014 biaxially oriented walls with enhanced properties \u2014 the polymer must be capable of strain-induced orientation (ideally including strain-induced crystallisation). Polymers that crystallise too rapidly, too slowly, or not at all in a useful way fail to develop the microstructure that makes ISBM containers superior to their injection-molded equivalents.<\/p>\n<div style=\"background-color:#e8f4fd;border-radius:8px;padding:20px 22px;margin-bottom:24px;\"><strong style=\"color:#1a2e44;\">Requirements for ISBM Material Suitability:<\/strong><\/p>\n<ul style=\"margin:12px 0 0 0;padding-left:22px;line-height:2.1;font-size:15px;color:#333;\">\n<li>Clear glass transition temperature (Tg) separating glassy state from rubbery state<\/li>\n<li>Sufficient melt strength in rubbery state to resist tearing during stretch<\/li>\n<li>Wide enough gap between Tg and Tm (or Tcc) to allow a practical process window<\/li>\n<li>Capacity for molecular orientation \u2014 chain alignment under deformation<\/li>\n<li>Good injection moldability \u2014 low injection viscosity at processing temp, good gate freezing<\/li>\n<\/ul>\n<\/div>\n<h2 style=\"font-size:24px;color:#1a2e44;border-left:4px solid #0066cc;padding-left:12px;margin-top:36px;\">Material 1 \u2014 PET (Polyethylene Terephthalate)<\/h2>\n<p style=\"font-size:16px;line-height:1.8;color:#333;margin-bottom:16px;\">PET is the dominant material for ISBM by volume globally and the benchmark against which all other ISBM materials are measured. Its combination of a well-defined Tg (~75\u00b0C), highly controllable orientation window (90\u2013105\u00b0C), and the remarkable phenomenon of strain-induced crystallinity make it uniquely suited to high-performance stretch-blow processing.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/onestepblowmoldingmachine.com\/wp-content\/uploads\/2026\/07\/isbm-machine-bottles-4.webp\" alt=\"PET bottles produced on ISBM machine showing crystal clarity and lightweight orientation-enhanced walls\" style=\"width:100%;max-width:100%;height:auto;border-radius:8px;margin-bottom:24px;display:block;\" \/><\/p>\n<div style=\"overflow-x:auto;-webkit-overflow-scrolling:touch;margin-bottom:28px;\">\n<table style=\"width:100%;border-collapse:collapse;min-width:520px;\">\n<thead>\n<tr style=\"background-color:#1a2e44;\">\n<th style=\"color:white;background-color:#1a2e44;padding:12px 14px;text-align:left;font-size:14px;\">PET Property<\/th>\n<th style=\"color:white;background-color:#1a2e44;padding:12px 14px;text-align:left;font-size:14px;\">Value \/ Range<\/th>\n<th style=\"color:white;background-color:#1a2e44;padding:12px 14px;text-align:left;font-size:14px;\">Implication for ISBM<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr style=\"background-color:#f8f9fa;\">\n<td style=\"padding:10px 14px;border-bottom:1px solid #e0e0e0;font-size:14px;\">Glass Transition Temperature<\/td>\n<td style=\"padding:10px 14px;border-bottom:1px solid #e0e0e0;font-size:14px;\">~75\u00b0C<\/td>\n<td style=\"padding:10px 14px;border-bottom:1px solid #e0e0e0;font-size:14px;\">Wide orientation window above Tg; easily achieved in conditioning station<\/td>\n<\/tr>\n<tr>\n<td style=\"padding:10px 14px;border-bottom:1px solid #e0e0e0;font-size:14px;\">Optimal blow window<\/td>\n<td style=\"padding:10px 14px;border-bottom:1px solid #e0e0e0;font-size:14px;\">90\u2013105\u00b0C<\/td>\n<td style=\"padding:10px 14px;border-bottom:1px solid #e0e0e0;font-size:14px;\">15\u201330\u00b0C window width \u2014 manageable, but requires stable conditioning control<\/td>\n<\/tr>\n<tr style=\"background-color:#f8f9fa;\">\n<td style=\"padding:10px 14px;border-bottom:1px solid #e0e0e0;font-size:14px;\">Strain-induced crystallinity<\/td>\n<td style=\"padding:10px 14px;border-bottom:1px solid #e0e0e0;font-size:14px;\">Yes \u2014 strong SIC effect<\/td>\n<td style=\"padding:10px 14px;border-bottom:1px solid #e0e0e0;font-size:14px;\">Superior barrier + strength from crystalline microstructure<\/td>\n<\/tr>\n<tr>\n<td style=\"padding:10px 14px;border-bottom:1px solid #e0e0e0;font-size:14px;\">Moisture sensitivity<\/td>\n<td style=\"padding:10px 14px;border-bottom:1px solid #e0e0e0;font-size:14px;\">High (hygroscopic)<\/td>\n<td style=\"padding:10px 14px;border-bottom:1px solid #e0e0e0;font-size:14px;\">Mandatory drying to &lt;50 ppm; dehumidifying dryer required<\/td>\n<\/tr>\n<tr style=\"background-color:#f8f9fa;\">\n<td style=\"padding:10px 14px;border-bottom:1px solid #e0e0e0;font-size:14px;\">Injection temp range<\/td>\n<td style=\"padding:10px 14px;border-bottom:1px solid #e0e0e0;font-size:14px;\">255\u2013285\u00b0C<\/td>\n<td style=\"padding:10px 14px;border-bottom:1px solid #e0e0e0;font-size:14px;\">Avoid exceeding 295\u00b0C \u2014 rapid degradation (yellowing, AA generation)<\/td>\n<\/tr>\n<tr>\n<td style=\"padding:10px 14px;border-bottom:1px solid #e0e0e0;font-size:14px;\">Intrinsic Viscosity (IV)<\/td>\n<td style=\"padding:10px 14px;border-bottom:1px solid #e0e0e0;font-size:14px;\">0.72\u20130.84 dL\/g (ISBM grade)<\/td>\n<td style=\"padding:10px 14px;border-bottom:1px solid #e0e0e0;font-size:14px;\">Higher IV = stronger preform and bottle; lower IV = easier injection<\/td>\n<\/tr>\n<tr style=\"background-color:#f8f9fa;\">\n<td style=\"padding:10px 14px;border-bottom:1px solid #e0e0e0;font-size:14px;\">Food contact<\/td>\n<td style=\"padding:10px 14px;border-bottom:1px solid #e0e0e0;font-size:14px;\">FDA, EU 10\/2011, most global approvals<\/td>\n<td style=\"padding:10px 14px;border-bottom:1px solid #e0e0e0;font-size:14px;\">Confirm acetaldehyde specification for water\/beverage contact<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p style=\"font-size:16px;line-height:1.8;color:#333;margin-bottom:16px;\"><strong>PET grades for ISBM:<\/strong> Not all PET is the same. For ISBM, use copolymer PET specifically designed for injection stretch blow molding (sometimes designated ISBM grade or bottle grade). Key specifications: IV 0.76\u20130.82 dL\/g; low diethylene glycol (DEG) content for good clarity; low acetaldehyde (AA) content or low AA generation catalyst for food\/beverage contact; nucleating agent-free (nucleated PET crystallises too rapidly for ISBM).<\/p>\n<div style=\"background-color:#f8f9fa;border-radius:8px;padding:16px 18px;margin-bottom:28px;border-left:4px solid #0066cc;\"><strong style=\"color:#1a2e44;\">PET ISBM Applications:<\/strong> Water bottles (500ml, 1L, 1.5L), juice bottles, pharmaceutical syrup bottles (30ml\u2013500ml), pharmaceutical tablet jars, cosmetic lotion and shampoo bottles, condiment jars, energy drink bottles, cooking oil bottles.<\/div>\n<h2 style=\"font-size:24px;color:#1a2e44;border-left:4px solid #0066cc;padding-left:12px;margin-top:36px;\">Material 2 \u2014 PP (Polypropylene)<\/h2>\n<p style=\"font-size:16px;line-height:1.8;color:#333;margin-bottom:16px;\">PP is the most technically challenging standard ISBM material. Unlike PET, PP is semi-crystalline with a melting point (approximately 145\u2013165\u00b0C for random copolymers) and no equivalent of PET&#8217;s well-separated Tg\/orientation window. The practical blow temperature window for PP is narrow \u2014 approximately 125\u2013140\u00b0C \u2014 and requires very stable conditioning temperature control to avoid the two failure modes: too cold (poor stretch, high blow pressure needed, tear risk) and too hot (rapid cold crystallisation producing pearlescence\/haze).<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/onestepblowmoldingmachine.com\/wp-content\/uploads\/2026\/07\/isbm-machine-bottles-5.webp\" alt=\"PP polypropylene bottles produced by ISBM machine for pharmaceutical and food packaging applications\" style=\"width:100%;max-width:100%;height:auto;border-radius:8px;margin-bottom:24px;display:block;\" \/><\/p>\n<div style=\"display:flex;flex-wrap:wrap;gap:16px;margin-bottom:24px;\">\n<div style=\"flex:1;min-width:240px;background:#fff3cd;border-radius:8px;padding:18px;border-top:3px solid #e67e00;\"><strong style=\"color:#1a2e44;font-size:14px;\">Why PP is Chosen for ISBM<\/strong><\/p>\n<ul style=\"margin:10px 0 0 0;padding-left:18px;font-size:13px;line-height:2;color:#444;\">\n<li>Higher chemical resistance than PET \u2014 suitable for aggressive chemicals, ketones, aromatic solvents<\/li>\n<li>Higher temperature resistance \u2014 can be sterilised at 121\u00b0C (autoclave) for medical use<\/li>\n<li>Better moisture vapour barrier than PET (critical for hygroscopic pharma products)<\/li>\n<li>PP homopolymer and copolymer are olefin-based \u2014 better compatibility with fatty products<\/li>\n<li>Can be pigmented opaque without sacrificing mechanical performance<\/li>\n<\/ul>\n<\/div>\n<div style=\"flex:1;min-width:240px;background:#fff3cd;border-radius:8px;padding:18px;border-top:3px solid #e67e00;\"><strong style=\"color:#1a2e44;font-size:14px;\">PP Grade Selection for ISBM<\/strong><\/p>\n<ul style=\"margin:10px 0 0 0;padding-left:18px;font-size:13px;line-height:2;color:#444;\">\n<li>Use random copolymer PP (rPP) \u2014 homopolymer PP is too crystalline, always shows pearlescence<\/li>\n<li>Nucleated grades crystallise too fast \u2014 avoid<\/li>\n<li>High-clarity rPP grades (e.g. Borpure from Borealis, PPH series from LyondellBasell) are preferred<\/li>\n<li>MFI 7\u201315 g\/10min recommended for ISBM injection; too low = difficult injection; too high = poor preform strength<\/li>\n<li>Confirm pharma grade if for pharmaceutical containers (USP\/EP compliant)<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<div style=\"background-color:#f8f9fa;border-radius:8px;padding:16px 18px;margin-bottom:28px;border-left:4px solid #0066cc;\"><strong style=\"color:#1a2e44;\">PP ISBM Applications:<\/strong> Pharmaceutical tablet jars (child-resistant closure types), pharmaceutical syrup bottles where PP chemical resistance is required, autoclave-sterilisable medical containers, food packaging for fatty products (oils, spreads), personal care products where PET is chemically incompatible.<\/div>\n<h2 style=\"font-size:24px;color:#1a2e44;border-left:4px solid #0066cc;padding-left:12px;margin-top:36px;\">Material 3 \u2014 PETG (Glycol-Modified PET)<\/h2>\n<p style=\"font-size:16px;line-height:1.8;color:#333;margin-bottom:16px;\">PETG (also written PET-G or GPET) is a copolymer of PET in which a portion of the ethylene glycol monomer is replaced by CHDM (cyclohexanedimethanol). This disrupts PET&#8217;s regular chain geometry, preventing crystallisation. The result is a permanently amorphous polymer with:<\/p>\n<ul style=\"padding-left:22px;line-height:2;font-size:16px;color:#333;margin-bottom:20px;\">\n<li>Higher inherent clarity than PET (no crystalline haze at all)<\/li>\n<li>Glass-like optical quality \u2014 transmittance above 90%, haze below 1%<\/li>\n<li>Tg approximately 81\u00b0C \u2014 slightly higher than PET, providing better heat resistance in the final container<\/li>\n<li>No strain-induced crystallinity \u2014 orientation develops but is amorphous throughout<\/li>\n<li>Excellent chemical resistance to aromatic fragrances and essential oils<\/li>\n<li>Much higher density than PET (1.27 g\/cm\u00b3) \u2014 heavier feel, premium perception<\/li>\n<\/ul>\n<p><img decoding=\"async\" src=\"https:\/\/onestepblowmoldingmachine.com\/wp-content\/uploads\/2026\/07\/isbm-machine-bottles-1.webp\" alt=\"PETG cosmetic bottles produced on ISBM machine showing premium glass-like optical clarity\" style=\"width:100%;max-width:100%;height:auto;border-radius:8px;margin-bottom:24px;display:block;\" \/><\/p>\n<p style=\"font-size:16px;line-height:1.8;color:#333;margin-bottom:16px;\">PETG is the dominant material for premium cosmetic packaging, particularly for fragrance (perfume) bottles, premium skin care, and any application where a glass-like aesthetic is required at plastic weight and cost. The inability of PETG to crystallise is a processing advantage (no cold crystallinity risk) but means it lacks the barrier improvement of PET; PETG bottles have essentially the same oxygen and CO2 permeability as unoriented PET.<\/p>\n<div style=\"background-color:#f8f9fa;border-radius:8px;padding:16px 18px;margin-bottom:28px;border-left:4px solid #0066cc;\"><strong style=\"color:#1a2e44;\">PETG ISBM Applications:<\/strong> Perfume and fragrance bottles (replacing heavy glass), premium cosmetic serums and creams, skin care packaging, specialty food items where maximum clarity is needed, promotional packaging where unusual geometry and high gloss are primary drivers.<\/div>\n<h2 style=\"font-size:24px;color:#1a2e44;border-left:4px solid #0066cc;padding-left:12px;margin-top:36px;\">Material Comparison Overview<\/h2>\n<div style=\"overflow-x:auto;-webkit-overflow-scrolling:touch;margin-bottom:28px;\">\n<table style=\"width:100%;border-collapse:collapse;min-width:600px;\">\n<thead>\n<tr style=\"background-color:#1a2e44;\">\n<th style=\"color:white;background-color:#1a2e44;padding:12px 14px;text-align:left;font-size:14px;\">Property<\/th>\n<th style=\"color:white;background-color:#1a2e44;padding:12px 14px;text-align:left;font-size:14px;\">PET<\/th>\n<th style=\"color:white;background-color:#1a2e44;padding:12px 14px;text-align:left;font-size:14px;\">PP<\/th>\n<th style=\"color:white;background-color:#1a2e44;padding:12px 14px;text-align:left;font-size:14px;\">PETG<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr style=\"background-color:#f8f9fa;\">\n<td style=\"padding:10px 14px;border-bottom:1px solid #e0e0e0;font-size:14px;\">Optical clarity<\/td>\n<td style=\"padding:10px 14px;border-bottom:1px solid #e0e0e0;font-size:14px;\">Excellent (oriented)<\/td>\n<td style=\"padding:10px 14px;border-bottom:1px solid #e0e0e0;font-size:14px;\">Good (orientation-dependent; pearlescence risk)<\/td>\n<td style=\"padding:10px 14px;border-bottom:1px solid #e0e0e0;font-size:14px;\">Outstanding (amorphous \u2014 always clear)<\/td>\n<\/tr>\n<tr>\n<td style=\"padding:10px 14px;border-bottom:1px solid #e0e0e0;font-size:14px;\">O2 barrier<\/td>\n<td style=\"padding:10px 14px;border-bottom:1px solid #e0e0e0;font-size:14px;\">Good (orientation-enhanced)<\/td>\n<td style=\"padding:10px 14px;border-bottom:1px solid #e0e0e0;font-size:14px;\">Moderate<\/td>\n<td style=\"padding:10px 14px;border-bottom:1px solid #e0e0e0;font-size:14px;\">Standard (no orientation crystallinity)<\/td>\n<\/tr>\n<tr style=\"background-color:#f8f9fa;\">\n<td style=\"padding:10px 14px;border-bottom:1px solid #e0e0e0;font-size:14px;\">Chemical resistance<\/td>\n<td style=\"padding:10px 14px;border-bottom:1px solid #e0e0e0;font-size:14px;\">Good (alcohols, dilute acids)<\/td>\n<td style=\"padding:10px 14px;border-bottom:1px solid #e0e0e0;font-size:14px;\">Excellent (wide chemical compatibility)<\/td>\n<td style=\"padding:10px 14px;border-bottom:1px solid #e0e0e0;font-size:14px;\">Good (better than PET for aromatic compounds)<\/td>\n<\/tr>\n<tr>\n<td style=\"padding:10px 14px;border-bottom:1px solid #e0e0e0;font-size:14px;\">Heat resistance<\/td>\n<td style=\"padding:10px 14px;border-bottom:1px solid #e0e0e0;font-size:14px;\">Standard (cold-fill only; hot-fill requires thermal treatment)<\/td>\n<td style=\"padding:10px 14px;border-bottom:1px solid #e0e0e0;font-size:14px;\">High (autoclavable up to 121\u00b0C)<\/td>\n<td style=\"padding:10px 14px;border-bottom:1px solid #e0e0e0;font-size:14px;\">Good (better than PET; not autoclavable)<\/td>\n<\/tr>\n<tr style=\"background-color:#f8f9fa;\">\n<td style=\"padding:10px 14px;border-bottom:1px solid #e0e0e0;font-size:14px;\">Processing ease<\/td>\n<td style=\"padding:10px 14px;border-bottom:1px solid #e0e0e0;font-size:14px;\">Excellent (widest window, most forgiving)<\/td>\n<td style=\"padding:10px 14px;border-bottom:1px solid #e0e0e0;font-size:14px;\">Difficult (narrow window, pearlescence risk)<\/td>\n<td style=\"padding:10px 14px;border-bottom:1px solid #e0e0e0;font-size:14px;\">Easy (amorphous; no crystallinity risk)<\/td>\n<\/tr>\n<tr>\n<td style=\"padding:10px 14px;border-bottom:1px solid #e0e0e0;font-size:14px;\">Relative material cost<\/td>\n<td style=\"padding:10px 14px;border-bottom:1px solid #e0e0e0;font-size:14px;\">Low (commodity polymer)<\/td>\n<td style=\"padding:10px 14px;border-bottom:1px solid #e0e0e0;font-size:14px;\">Low (commodity polymer)<\/td>\n<td style=\"padding:10px 14px;border-bottom:1px solid #e0e0e0;font-size:14px;\">Medium-High (specialty copolymer)<\/td>\n<\/tr>\n<tr style=\"background-color:#f8f9fa;\">\n<td style=\"padding:10px 14px;border-bottom:1px solid #e0e0e0;font-size:14px;\">Primary sector<\/td>\n<td style=\"padding:10px 14px;border-bottom:1px solid #e0e0e0;font-size:14px;\">Beverage, food, pharma<\/td>\n<td style=\"padding:10px 14px;border-bottom:1px solid #e0e0e0;font-size:14px;\">Pharma, food, medical<\/td>\n<td style=\"padding:10px 14px;border-bottom:1px solid #e0e0e0;font-size:14px;\">Cosmetics, fragrances, premium food<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<h2 style=\"font-size:24px;color:#1a2e44;border-left:4px solid #0066cc;padding-left:12px;margin-top:36px;\">Emerging and Specialty Materials<\/h2>\n<p style=\"font-size:16px;line-height:1.8;color:#333;margin-bottom:16px;\">Beyond the three standard materials, ISBM research and limited production has been demonstrated with several emerging materials:<\/p>\n<div style=\"display:flex;flex-wrap:wrap;gap:14px;margin-bottom:28px;\">\n<div style=\"flex:1;min-width:220px;border:1px solid #dde4ec;border-radius:8px;padding:16px;\"><strong style=\"color:#1a2e44;font-size:14px;\">rPET (Recycled PET)<\/strong><\/p>\n<p style=\"font-size:13px;color:#555;margin-top:8px;line-height:1.7;\">Up to 100% post-consumer recycled PET can be processed on ISBM machines, but requires careful IV management and may show more color variation. Growing commercial adoption due to sustainability mandates (EU PPWR regulation).<\/p>\n<\/div>\n<div style=\"flex:1;min-width:220px;border:1px solid #dde4ec;border-radius:8px;padding:16px;\"><strong style=\"color:#1a2e44;font-size:14px;\">PEF (Polyethylene Furanoate)<\/strong><\/p>\n<p style=\"font-size:13px;color:#555;margin-top:8px;line-height:1.7;\">Bio-based polymer from furfural (plant-derived). Tg ~86\u00b0C, excellent O2 barrier (10\u00d7 better than PET), CO2 barrier 3\u00d7 better. Processing similar to PET. Niche and expensive but growing interest from beverage sector.<\/p>\n<\/div>\n<div style=\"flex:1;min-width:220px;border:1px solid #dde4ec;border-radius:8px;padding:16px;\"><strong style=\"color:#1a2e44;font-size:14px;\">PLA (Polylactic Acid)<\/strong><\/p>\n<p style=\"font-size:13px;color:#555;margin-top:8px;line-height:1.7;\">Biodegradable; Tg ~55\u201360\u00b0C. Can be ISBM processed but very narrow window and poor barrier versus PET. Limited adoption \u2014 heat resistance is a significant challenge in filled containers. Growing interest for bio-packaging but not mainstream ISBM material yet.<\/p>\n<\/div>\n<div style=\"flex:1;min-width:220px;border:1px solid #dde4ec;border-radius:8px;padding:16px;\"><strong style=\"color:#1a2e44;font-size:14px;\">Bio-PET<\/strong><\/p>\n<p style=\"font-size:13px;color:#555;margin-top:8px;line-height:1.7;\">PET made from bio-derived ethylene glycol (sugarcane-derived MEG, up to 30% bio-based content). Drop-in replacement for fossil PET \u2014 identical processing, identical properties. Growing availability from major PET producers.<\/p>\n<\/div>\n<\/div>\n<p style=\"font-size:16px;line-height:1.8;color:#333;margin-bottom:24px;\">All <a href=\"\/zh\/products\/isbm-machines\/\" style=\"color:#0066cc;text-decoration:underline;\">ISBM machines in our range<\/a> are validated for PET, PP, and PETG processing. For rPET, Bio-PET, and other specialty resins, <a href=\"\/zh\/contact-us\/\" style=\"color:#0066cc;text-decoration:underline;\">contact us to discuss material compatibility and any required processing modifications<\/a>.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/onestepblowmoldingmachine.com\/wp-content\/uploads\/2026\/07\/isbm-machine-factory-3.webp\" alt=\"ISBM machine factory floor showing material handling and drying systems for PET PP and PETG processing\" style=\"width:100%;max-width:100%;height:auto;border-radius:8px;margin-bottom:28px;display:block;\" \/><\/p>\n<h2 style=\"font-size:24px;color:#1a2e44;border-left:4px solid #0066cc;padding-left:12px;margin-top:36px;\">Frequently Asked Questions<\/h2>\n<details style=\"border:1px solid #dde4ec;border-radius:6px;margin-bottom:10px;\">\n<summary style=\"padding:14px 16px;cursor:pointer;font-weight:600;font-size:15px;color:#1a2e44;background:#f5f8fc;border-radius:6px;list-style:none;\">Can I switch between PET and PP on the same ISBM machine?<\/summary>\n<div style=\"padding:14px 16px;font-size:15px;line-height:1.8;color:#444;\">Yes \u2014 most one-step ISBM machines can process both PET and PP with a mold change and parameter adjustment. However, barrel and screw must be thoroughly purged between materials, and conditioning station parameters require significant adjustment (PET at 90\u2013105\u00b0C versus PP at 125\u2013140\u00b0C). Some machines require a different screw profile for PP versus PET injection; consult the machine specification documentation for your model.<\/div>\n<\/details>\n<details style=\"border:1px solid #dde4ec;border-radius:6px;margin-bottom:10px;\">\n<summary style=\"padding:14px 16px;cursor:pointer;font-weight:600;font-size:15px;color:#1a2e44;background:#f5f8fc;border-radius:6px;list-style:none;\">What is the difference between bottle-grade PET and general-purpose PET?<\/summary>\n<div style=\"padding:14px 16px;font-size:15px;line-height:1.8;color:#444;\">Bottle-grade (ISBM-grade) PET is a copolymer with IV typically 0.76\u20130.84 dL\/g, optimised for low acetaldehyde generation, good stretch behaviour, and food contact compliance. General-purpose PET for injection molding may have higher IV, different catalyst systems, or may not be a copolymer \u2014 which affects clarity and stretch behaviour. Always specify ISBM-grade bottle PET for best results.<\/div>\n<\/details>\n<details style=\"border:1px solid #dde4ec;border-radius:6px;margin-bottom:10px;\">\n<summary style=\"padding:14px 16px;cursor:pointer;font-weight:600;font-size:15px;color:#1a2e44;background:#f5f8fc;border-radius:6px;list-style:none;\">Can I use colour masterbatch in PET for ISBM?<\/summary>\n<div style=\"padding:14px 16px;font-size:15px;line-height:1.8;color:#444;\">Yes \u2014 PET-compatible colour masterbatches can be dosed via a gravimetric blender at the machine hopper. Ensure the masterbatch carrier resin is PET-compatible and that the masterbatch has been dried at 160\u00b0C before use. Coloured PET bottles can be difficult to inspect visually for defects \u2014 consider UV or light-based vision inspection systems for coloured production.<\/div>\n<\/details>\n<div style=\"background-color:#1a2e44;color:white;border-radius:10px;padding:28px 24px;margin-top:40px;text-align:center;\">\n<h3 style=\"color:white;font-size:22px;margin-bottom:12px;\">Not Sure Which Material to Specify for Your ISBM Container?<\/h3>\n<p style=\"color:#cde;font-size:15px;margin-bottom:20px;line-height:1.7;\">Share your product contents, required shelf life, closure type, and target market \u2014 we will advise on material specification and machine setup for your application.<\/p>\n<p><a href=\"\/zh\/contact-us\/\" style=\"background-color:#f0a500;color:#1a2e44;padding:13px 32px;border-radius:6px;text-decoration:none;font-weight:700;font-size:16px;display:inline-block;\">Request Material Guidance<\/a><\/div>\n<p><script type=\"application\/ld+json\">{\n    \"@context\": \"https:\\\/\\\/schema.org\",\n    \"@graph\": [\n        {\n            \"@type\": \"Article\",\n            \"headline\": \"What Materials Can Be Processed on an ISBM Machine?\",\n            \"description\": \"Complete guide to ISBM machine material compatibility covering PET, PP, PETG, and emerging materials including processing parameters, property comparison, and application guidance.\",\n            \"author\": {\n                \"@type\": \"Organization\",\n                \"name\": \"Ever-Power ISBM Machines\"\n            }\n        },\n        {\n            \"@type\": \"FAQPage\",\n            \"mainEntity\": [\n                {\n                    \"@type\": \"Question\",\n                    \"name\": \"Can I switch between PET and PP on the same ISBM machine?\",\n                    \"acceptedAnswer\": {\n                        \"@type\": \"Answer\",\n                        \"text\": \"Yes \\u2014 with a mold change, parameter adjustment, and thorough purge between materials. 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The question of material compatibility is fundamental to any ISBM machine investment. Unlike extrusion blow molding which can process a wide variety of thermoplastics, injection stretch blow molding is limited to polymers [&hellip;]<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[125],"tags":[158,154,155,157,156],"class_list":["post-176","post","type-post","status-publish","format-standard","hentry","category-isbm-machine-blogs","tag-blow-molding-material-selection","tag-isbm-machine-materials","tag-pet-blow-molding-resin","tag-petg-isbm-bottles","tag-pp-injection-stretch-blow-molding"],"_links":{"self":[{"href":"https:\/\/onestepblowmoldingmachine.com\/zh\/wp-json\/wp\/v2\/posts\/176","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/onestepblowmoldingmachine.com\/zh\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/onestepblowmoldingmachine.com\/zh\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/onestepblowmoldingmachine.com\/zh\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/onestepblowmoldingmachine.com\/zh\/wp-json\/wp\/v2\/comments?post=176"}],"version-history":[{"count":0,"href":"https:\/\/onestepblowmoldingmachine.com\/zh\/wp-json\/wp\/v2\/posts\/176\/revisions"}],"wp:attachment":[{"href":"https:\/\/onestepblowmoldingmachine.com\/zh\/wp-json\/wp\/v2\/media?parent=176"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/onestepblowmoldingmachine.com\/zh\/wp-json\/wp\/v2\/categories?post=176"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/onestepblowmoldingmachine.com\/zh\/wp-json\/wp\/v2\/tags?post=176"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}