{"id":7332,"date":"2026-10-24T18:28:38","date_gmt":"2026-10-24T17:28:38","guid":{"rendered":"https:\/\/uplastech.com\/pvc-injection-molding\/"},"modified":"2026-10-25T04:34:57","modified_gmt":"2026-10-25T04:34:57","slug":"pvc-injection-molding","status":"publish","type":"page","link":"https:\/\/uplastech.com\/ja\/pvc-injection-molding\/","title":{"rendered":"Custom PVC 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\">PVC is cheap, inherently flame retardant and resistant to most inorganic chemicals, which keeps it in pipe fittings, electrical boxes and medical tubing connectors despite environmental pressure on the material. It is also the most process-sensitive plastic we run: overheated PVC releases hydrogen chloride, which attacks the tool, the machine and the operator. Corrosion-resistant hardware and strict temperature control are prerequisites, not precautions.<\/p>\n<p>  <img decoding=\"async\" src=\"https:\/\/uplastech.com\/wp-content\/uploads\/2026\/10\/pvc-fittings.jpg\" alt=\"Custom PVC Injection Molding \u2014 Pipe fittings, valves and drainage components\" style=\"width:100%;border-radius:12px;margin:0 0 30px\"><\/p>\n<div class=\"stats\">\n<div class=\"stat\"><b>60 \u2013 70 \u00b0C<\/b><span>HDT at 1.8 MPa<\/span><\/div>\n<div class=\"stat\"><b>40 \u2013 55 MPa<\/b><span>Tensile strength<\/span><\/div>\n<div class=\"stat\"><b style=\"font-size:18px\">1.38 \u2013 1.45 g\/cm\u00b3<\/b><span>\u5bc6\u5ea6<\/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>\u30d7\u30ed\u30d1\u30c6\u30a3<\/th>\n<th>Typical value<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\u5bc6\u5ea6<\/td>\n<td>1.38 \u2013 1.45 g\/cm\u00b3 (rigid)<\/td>\n<\/tr>\n<tr>\n<td>Tensile strength<\/td>\n<td>40 \u2013 55 MPa (rigid)<\/td>\n<\/tr>\n<tr>\n<td>Flexural modulus<\/td>\n<td>2.4 \u2013 3.0 GPa<\/td>\n<\/tr>\n<tr>\n<td>HDT at 1.8 MPa<\/td>\n<td>60 \u2013 70 \u00b0C<\/td>\n<\/tr>\n<tr>\n<td>Mould shrinkage<\/td>\n<td>0.2 \u2013 0.6 %<\/td>\n<\/tr>\n<tr>\n<td>Flammability<\/td>\n<td>Self-extinguishing, UL 94 V-0 achievable<\/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>Pipe fittings, valves and drainage components<\/li>\n<li>Electrical conduit boxes and cable management<\/li>\n<li>Medical tubing connectors and fluid fittings<\/li>\n<li>Window profiles and construction hardware<\/li>\n<li>Flexible gaskets and boot seals in plasticised grades<\/li>\n<\/ul>\n<h2>Processing notes<\/h2>\n<ul>\n<li>Melt 170 \u2013 200 \u00b0C. Every 10 \u00b0C above the window shortens the safety margin; use a hot-runner controller with tight deviation alarms.<\/li>\n<li>The tool and screw must be corrosion resistant \u2014 chrome or stainless. Bare steel will pit within months of running PVC.<\/li>\n<li>Residence time is the real risk. Size the shot so the melt does not sit in the barrel, and purge thoroughly at every stop.<\/li>\n<li>Plasticised grades migrate. If the part touches food, skin or a painted surface, specify a non-migrating plasticiser and confirm with the grade supplier.<\/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>Is PVC still acceptable for medical devices?<\/h3>\n<p>Yes for many applications, but the market has shifted toward DEHP-free plasticisers and, in some segments, away from PVC entirely. Tell us the regulatory market and we will specify a compliant grade or propose a substitute.<\/p>\n<h3>Can you mould flexible PVC?<\/h3>\n<p>Yes, in plasticised grades from about 50 Shore A upward. Flexible PVC needs more generous runners and lower packing than rigid, and the shrinkage differs, so it is quoted as a separate process.<\/p>\n<\/p><\/div>\n<h2>Related materials<\/h2>\n<ul class=\"related\">\n<li><a href=\"\/ja\/abs-injection-molding\/\">ABS Injection Molding<\/a><\/li>\n<li><a href=\"\/ja\/pc-injection-molding\/\">PC Injection Molding<\/a><\/li>\n<li><a href=\"\/ja\/pp-injection-molding\/\">PP Injection Molding<\/a><\/li>\n<li><a href=\"\/ja\/pe-injection-molding\/\">PE Injection Molding<\/a><\/li>\n<li><a href=\"\/ja\/nylon-pa-injection-molding\/\">Nylon Injection Molding<\/a><\/li>\n<li><a href=\"\/ja\/pom-acetal-injection-molding\/\">POM Injection Molding<\/a><\/li>\n<\/ul>\n<p><a href=\"\/ja\/injection-molding\/\">\u2190 All Injection Molding Solutions<\/a><\/p>\n<div class=\"cta\">\n<h2>Send us your PVC 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=\"\/ja\/%e3%82%b3%e3%83%b3%e3%82%bf%e3%82%af%e3%83%88\/\">Request a quote<\/a>\n  <\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>PVC is cheap, inherently flame retardant and resistant to most inorganic chemicals, which keeps it in pipe fittings, electrical boxes and medical tubing connectors despite environmental pressure on the material. It is also the most process-sensitive plastic we run: overheated PVC releases hydrogen chloride, which attacks the tool, the machine and the operator. Corrosion-resistant hardware and strict temperature control are prerequisites, not precautions. 60 \u2013 70 \u00b0CHDT at 1.8 MPa 40 \u2013 55 MPaTensile strength 1.38 \u2013 1.45 g\/cm\u00b3Density Typical values for standard moulding grades. Exact figures depend on the specific compound or grade \u2014 confirm against your drawing before quoting. Key properties Property Typical value Density 1.38 \u2013 1.45 [&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 PVC Injection Molding | Rigid & Flexible | Uplastech","_seopress_titles_desc":"Custom rigid and flexible PVC injection moulding for pipe fittings, electrical components and medical parts. 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