{"id":7318,"date":"2026-10-24T18:27:56","date_gmt":"2026-10-24T17:27:56","guid":{"rendered":"https:\/\/uplastech.com\/pbt-pet-injection-molding\/"},"modified":"2026-10-25T04:34:23","modified_gmt":"2026-10-25T04:34:23","slug":"pbt-pet-injection-molding","status":"publish","type":"page","link":"https:\/\/uplastech.com\/it\/pbt-pet-injection-molding\/","title":{"rendered":"Custom PBT &#038; PET Injection Molding"},"content":{"rendered":"<style>\n.upl-page{font-size:17px;line-height:1.78;color:#1f2937}\n.upl-page p{margin:0 0 18px}\n.upl-page h1{font-size:38px;line-height:1.16;letter-spacing:-.025em;color:#0b2b33;margin:0 0 18px;font-weight:800}\n.upl-page h2{font-size:26px;line-height:1.3;color:#0b2b33;margin:48px 0 14px;font-weight:700;letter-spacing:-.015em}\n.upl-page h3{font-size:19px;color:#0d3b47;margin:26px 0 10px;font-weight:700}\n.upl-page ul,.upl-page ol{margin:0 0 20px;padding-left:22px}\n.upl-page li{margin:0 0 9px}\n.upl-page .lead{font-size:19px;line-height:1.65;color:#4b5563;margin:0 0 36px}\n.upl-page a{color:#0d6b7d}\n.upl-page strong{color:#0b2b33}\n.upl-page .sec-note{font-size:13px;color:#6b7280;margin:-4px 0 26px}\n.upl-page .stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:16px;margin:0 0 20px}\n.upl-page .stat{background:#f7fafb;border:1px solid #e3ebee;border-left:3px solid #14707f;border-radius:8px;padding:16px 20px}\n.upl-page .stat b{display:block;font-size:24px;line-height:1.2;color:#0b2b33;letter-spacing:-.02em;margin-bottom:4px}\n.upl-page .stat span{font-size:12.5px;color:#6b7280;letter-spacing:.04em;text-transform:uppercase;font-weight:600}\n.upl-page .prod-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:26px;margin:0 0 16px}\n.upl-page .prod{background:#fff;border:1px solid #e6ebed;border-radius:12px;overflow:hidden;display:flex;flex-direction:column;scroll-margin-top:96px}\n.upl-page .prod img{width:100%;height:198px;object-fit:cover;display:block;background:#f2f5f6}\n.upl-page .prod .txt{padding:17px 20px 21px;flex:1}\n.upl-page .prod h3{margin:0 0 8px;font-size:17.5px;line-height:1.35;color:#0b2b33}\n.upl-page .prod p{margin:0;font-size:14.5px;color:#5b666b;line-height:1.62}\n.upl-page table{width:100%;border-collapse:collapse;font-size:14.5px;margin:0 0 10px}\n.upl-page th{background:#0d3b47;color:#fff;text-align:left;padding:11px 13px;font-weight:600;font-size:13.5px;border:0}\n.upl-page td{padding:11px 13px;border:0;border-bottom:1px solid #e8ebed;vertical-align:top}\n.upl-page tbody tr:nth-child(even){background:#fafbfc}\n.upl-page .tablecap{font-size:12.5px;color:#6b7280;margin:0 0 30px}\n.upl-page .callout{background:#f2f8f9;border-radius:8px;padding:18px 22px;margin:0 0 26px;font-size:15.5px;border-left:3px solid #14707f}\n.upl-page .faq h3{border-top:1px solid #eceff1;padding-top:22px;margin-top:0;font-size:18px}\n.upl-page .faq h3:first-of-type{border-top:0;padding-top:0}\n.upl-page .cta{background:linear-gradient(135deg,#0b2b33,#0d5563);color:#fff;border-radius:12px;padding:36px;margin:52px 0 20px}\n.upl-page .cta h2{color:#fff;margin:0 0 10px;font-size:25px}\n.upl-page .cta p{color:#c9dee3;margin:0 0 22px;font-size:16px}\n.upl-page .btn{display:inline-block;background:#e07a1f;color:#fff;text-decoration:none;font-weight:700;padding:13px 26px;border-radius:8px;font-size:15.5px}\n@media(max-width:640px){.upl-page h1{font-size:28px}.upl-page h2{font-size:22px}.upl-page .prod img{height:180px}.upl-page table{font-size:13px}}\n<\/style>\n<div class=\"upl-page\">\n<p class=\"lead\">PBT and PET are the electrical industry's default polyesters. Glass-filled grades hold heat to 200 \u00b0C, resist tracking, and keep their dimensions in humid enclosures \u2014 which is why connectors, coil formers, switch housings and sensor bodies are so often moulded in them. PBT crystallises faster and is easier to process; PET is tougher and cheaper where the geometry allows a hotter tool.<\/p>\n<p>  <img decoding=\"async\" src=\"https:\/\/uplastech.com\/wp-content\/uploads\/2026\/10\/pbt-connectors.jpg\" alt=\"Custom PBT &amp; PET Injection Molding \u2014 Electrical connectors and terminal blocks\" style=\"width:100%;border-radius:12px;margin:0 0 30px\"><\/p>\n<div class=\"stats\">\n<div class=\"stat\"><b>150 \u2013 200 \u00b0C<\/b><span>HDT (GF30)<\/span><\/div>\n<div class=\"stat\"><b>120 \u2013 150 MPa<\/b><span>Tensile (GF30)<\/span><\/div>\n<div class=\"stat\"><b>0.4 \u2013 2.0 %<\/b><span>Restringimento<\/span><\/div>\n<\/p><\/div>\n<p class=\"sec-note\">Typical values for standard moulding grades. Exact figures depend on the specific compound or grade \u2014 confirm against your drawing before quoting.<\/p>\n<h2>Key properties<\/h2>\n<table>\n<thead>\n<tr>\n<th>Propriet\u00e0<\/th>\n<th>Typical value<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Densit\u00e0<\/td>\n<td>1.30 \u2013 1.40 g\/cm\u00b3 (unfilled)<\/td>\n<\/tr>\n<tr>\n<td>Tensile strength<\/td>\n<td>50 \u2013 60 MPa unfilled \/ 120 \u2013 150 MPa GF30<\/td>\n<\/tr>\n<tr>\n<td>Flexural modulus<\/td>\n<td>2.4 \u2013 2.8 GPa unfilled<\/td>\n<\/tr>\n<tr>\n<td>HDT at 1.8 MPa<\/td>\n<td>150 \u2013 200 \u00b0C (GF30)<\/td>\n<\/tr>\n<tr>\n<td>Mould shrinkage<\/td>\n<td>0.4 \u2013 2.0 % depending on fill<\/td>\n<\/tr>\n<tr>\n<td>Water absorption (24 h)<\/td>\n<td>0.1 \u2013 0.4 %<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p class=\"tablecap\">Values are typical for unfilled moulding grades at 23 \u00b0C unless stated. Glass-filled and specialty grades differ.<\/p>\n<h2>Typical applications<\/h2>\n<ul>\n<li>Electrical connectors and terminal blocks<\/li>\n<li>Coil formers and bobbins<\/li>\n<li>Automotive sensor and actuator housings<\/li>\n<li>Switch bodies and relay components<\/li>\n<li>Pump housings and fluid-handling parts<\/li>\n<\/ul>\n<h2>Processing notes<\/h2>\n<ul>\n<li>Dry 4 h at 120 \u00b0C. Polyester hydrolyses readily; wet resin loses molecular weight and the part turns brittle.<\/li>\n<li>PBT: melt 240 \u2013 270 \u00b0C, mould 60 \u2013 90 \u00b0C. PET needs a hotter mould, 100 \u2013 140 \u00b0C, to crystallise properly.<\/li>\n<li>Glass-filled grades warp anisotropically. Gate position and fibre orientation decide whether a flat connector stays flat.<\/li>\n<li>Weld lines in glass-filled polyester are weak. Keep structural loads away from weld-line locations or specify a flow leader.<\/li>\n<\/ul>\n<div class=\"callout\">\n    <strong>Tooling, not just material.<\/strong> Every material above behaves differently in the tool \u2014 shrinkage, gate position, cooling and ejection all change. We review the DFM against the specific grade before the tool is cut, so the first shot is a sample, not a surprise.\n  <\/div>\n<div class=\"faq\">\n<h2>Frequently asked questions<\/h2>\n<h3>PBT or PET for a connector?<\/h3>\n<p>PBT for most connectors \u2014 faster cycle, more forgiving process window, better dimensional consistency. PET where the part needs higher toughness or the tool can run hot enough to crystallise it properly.<\/p>\n<h3>Do you supply UL yellow-card documentation?<\/h3>\n<p>Yes, for the specific grade used. Send us the flammability and temperature rating you need and we will confirm the resin family before quoting, because the UL file number attaches to the grade, not the moulder.<\/p>\n<\/p><\/div>\n<h2>Related materials<\/h2>\n<ul class=\"related\">\n<li><a href=\"\/it\/abs-injection-molding\/\">ABS Injection Molding<\/a><\/li>\n<li><a href=\"\/it\/pc-injection-molding\/\">PC Injection Molding<\/a><\/li>\n<li><a href=\"\/it\/pp-injection-molding\/\">PP Injection Molding<\/a><\/li>\n<li><a href=\"\/it\/pe-injection-molding\/\">PE Injection Molding<\/a><\/li>\n<li><a href=\"\/it\/nylon-pa-injection-molding\/\">Nylon Injection Molding<\/a><\/li>\n<li><a href=\"\/it\/pom-acetal-injection-molding\/\">POM Injection Molding<\/a><\/li>\n<\/ul>\n<p><a href=\"\/it\/injection-molding\/\">\u2190 All Injection Molding Solutions<\/a><\/p>\n<div class=\"cta\">\n<h2>Send us your PBT &amp; PET drawing<\/h2>\n<p>Upload a 3D model or a 2D drawing and we will come back with a DFM review, a tooling cost and a piece price \u2014 usually within two working days.<\/p>\n<p>    <a class=\"btn\" href=\"\/it\/contatto\/\">Request a quote<\/a>\n  <\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>PBT and PET are the electrical industry&#8217;s default polyesters. Glass-filled grades hold heat to 200 \u00b0C, resist tracking, and keep their dimensions in humid enclosures \u2014 which is why connectors, coil formers, switch housings and sensor bodies are so often moulded in them. PBT crystallises faster and is easier to process; PET is tougher and [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_seopress_titles_title":"Custom PBT & PET Injection Molding | Uplastech","_seopress_titles_desc":"Custom PBT and PET injection moulding for connectors, coil formers and automotive electronics. 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