{"id":3400,"date":"2025-07-04T21:40:21","date_gmt":"2025-07-04T13:40:21","guid":{"rendered":"https:\/\/taichungbro.com\/?p=3400"},"modified":"2025-07-04T21:42:55","modified_gmt":"2025-07-04T13:42:55","slug":"silicone-rubber","status":"publish","type":"post","link":"https:\/\/www.taichungbro.com\/en\/2025\/07\/04\/silicone-rubber\/","title":{"rendered":"Why is silicone rubber hailed as the all-purpose adhesive for manufacturing? Master its 3 key properties at a glance."},"content":{"rendered":"<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<div class=\"wp-block-rank-math-toc-block\" id=\"rank-math-toc\"><h2>Table of Content<\/h2><nav><ul><li class=\"\"><a href=\"#\u77fd\u81a0\u7684\u5206\u5b50\u7d50\u69cb\u8207\u95dc\u9375\u7269\u6027\">Molecular structure and key physical properties of silicone<\/a><\/li><li class=\"\"><a href=\"#\u6210\u5f62\u8207\u52a0\u5de5\uff1a\u5f9e\u6db2\u614b\u77fd\u81a0\u5c04\u51fa\u5230\u58d3\u7e2e\u6210\u5f62\">Molding and Processing: From Liquid Silicone Injection to Compression Molding<\/a><\/li><li class=\"\"><a href=\"#\u4e3b\u8981\u61c9\u7528\u9818\u57df\uff1a\u5f9e\u8010\u9ad8\u6eab\u588a\u7247\u5230\u91ab\u7642\u7d1a\u690d\u5165\u7269\">Main application areas: From high-temperature resistant gaskets to medical-grade implants<\/a><\/li><li class=\"\"><a href=\"#\u8a2d\u8a08\u53c3\u8003\u8868\uff1a\u786c\u5ea6\u3001\u62c9\u4f38\u5f37\u5ea6\u8207\u6eab\u5ea6\u7bc4\u570d\">Design Reference Table: Hardness, Tensile Strength, and Temperature Range<\/a><\/li><li class=\"\"><a href=\"#\u7d50\u8a9e\">Conclusion<\/a><\/li><\/ul><\/nav><\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<p class=\"wp-block-paragraph\">Silicone rubber, with its combination of low-temperature ductility down to -60\u00b0C and high-temperature stability up to 250\u00b0C, is known as the &quot;all-purpose adhesive in manufacturing.&quot; From automotive and electronics to medical and kitchenware, silicone materials are found in almost every application requiring heat resistance, cold resistance, insulation, or biocompatibility. This article will guide you through a quick overview of silicone&#039;s molecular structure, processing methods, application examples, and the design parameters that engineers care about most, so you can move beyond guesswork when developing products.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"\u77fd\u81a0\u7684\u5206\u5b50\u7d50\u69cb\u8207\u95dc\u9375\u7269\u6027\">Molecular structure and key physical properties of silicone<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Silicone is an elastomer with an alternating silicon-oxygen backbone (\u2013Si\u2013O\u2013Si\u2013). This backbone has bond lengths approximately 1.6 times longer than carbon chains and larger bond angles, providing extremely high flexibility and rotational freedom. Simultaneously, the Si\u2013O bond energy (approximately 444 kJ\/mol) is much higher than that of the C\u2013C bond (approximately 348 kJ\/mol), endowing the material with excellent thermal stability and chemical inertness. Therefore, silicone possesses the following characteristics:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Wide operating temperature range<\/strong>It can maintain its elasticity for a long time between -60 \u00b0C and +250 \u00b0C.<\/li>\n\n\n\n<li><strong>Excellent electrical insulation<\/strong>Volume resistivity above 10\u00b9\u2074 \u03a9\u00b7cm, suitable for high-frequency or corona-resistant environments.<\/li>\n\n\n\n<li><strong>Weather resistant and UV resistant<\/strong>The Si\u2013O bond is not easily damaged by UV energy, resulting in a much longer outdoor lifespan than traditional rubber.<\/li>\n\n\n\n<li><strong>Biocompatibility<\/strong>Medical-grade silicone is inert to human tissue and can be implanted or in long-term contact with the skin.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"\u6210\u5f62\u8207\u52a0\u5de5\uff1a\u5f9e\u6db2\u614b\u77fd\u81a0\u5c04\u51fa\u5230\u58d3\u7e2e\u6210\u5f62\">Molding and Processing: From Liquid Silicone Injection to Compression Molding<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The processing method determines the dimensional accuracy and economy of the product. A comparison of common processes is as follows:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>Forming method<\/th><th>Viscosity range (Pa\u00b7s)<\/th><th>Mold temperature (\u00b0C)<\/th><th>Curing time (s)<\/th><th>characteristic<\/th><\/tr><\/thead><tbody><tr><td>LSR Injection Molding<\/td><td>20\u201350<\/td><td>170\u2013200<\/td><td>30\u201360<\/td><td>The two liquids are mixed and then directly injected, making it suitable for mass production of microstructured parts.<\/td><\/tr><tr><td>Compression molding<\/td><td>1000\u20135000<\/td><td>150\u2013180<\/td><td>120\u2013300<\/td><td>Low mold cost, capable of producing thick-walled or large-sized parts.<\/td><\/tr><tr><td>Extrusion molding<\/td><td>200\u2013800<\/td><td>120\u2013150<\/td><td>continuous<\/td><td>Continuous production of pipes, wires or sealing strips<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Regarding parameter settings, if the mold temperature is too low during LSR injection, incomplete filling may occur; for compression molding, care must be taken to avoid excessive vulcanization time leading to charring. For high-precision applications (such as button gaskets), it is recommended to use LSR with a cold runner system to reduce waste and shrinkage.<\/p>\n\n\n\n<div style=\"height:var(--wp--preset--spacing--30)\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<h5 class=\"wp-block-heading has-text-align-center\" id=\"\u60f3\u4e86\u89e3\u6709\u95dc\u7ba1\u87ba\u7d0b\u3001\u76f4\u87ba\u7d0b\u3001\u9310\u87ba\u7d0b\u3001\u5c3a\u5bf8\u8868\u793a\u3001\u82f1\u5236\u7ba1\u87ba\u7d0b\u3001\u516c\u5236\u7ba1\u87ba\u7d0b\u7684\u77e5\u8b58\u55ce\uff1f-\u5ef6\u4f38\u95b1\u8b80\uff1a\u300a\u7ba1\u87ba\u7d0b\u767e\u767e\u7a2e-\u4f60\u90fd\u8a8d\u8b58\u55ce-\u300b\">Want to know more about perfluorinated rubber and FFKM? <br>Further Reading :<a href=\"https:\/\/www.taichungbro.com\/en\/2023\/11\/20\/material-ffkm\/\" data-type=\"link\" data-id=\"https:\/\/taichungbro.com\/2023\/10\/28\/screw\/\" target=\"_blank\" rel=\"noopener\">The King of Rubber: Perfluorinated Rubber FFKM<\/a><\/h5>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<div style=\"height:11px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"\u4e3b\u8981\u61c9\u7528\u9818\u57df\uff1a\u5f9e\u8010\u9ad8\u6eab\u588a\u7247\u5230\u91ab\u7642\u7d1a\u690d\u5165\u7269\">Main application areas: From high-temperature resistant gaskets to medical-grade implants<\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Automotive and aerospace sealing<\/strong>Turbocharging lines and O-rings need to withstand high temperatures and lubricating oil; 50 Shore A oil-resistant silicone can operate continuously at 220 \u00b0C.<\/li>\n\n\n\n<li><strong>Consumer electronics<\/strong>Waterproof rings for smartwatches and protective cases for mobile phones utilize the weather resistance and color flexibility of silicone.<\/li>\n\n\n\n<li><strong>Food and home appliances<\/strong>Baking molds, nipples, and kettle sealing rings must be FDA\/LFGB certified and use platinum addition-type medical\/food grade formulas.<\/li>\n\n\n\n<li><strong>Medical implants<\/strong>Cardiac catheters and artificial joint pads require long-term biocompatibility, and high-purity silicone retains its elasticity even after sterilization with gamma rays or ethylene oxide.<\/li>\n\n\n\n<li><strong>Semiconductor manufacturing process<\/strong>The plasma etching chamber O-ring uses fluorosilicone gel (FVMQ) to resist corrosion from reactive gases such as fluorine.<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"\u8a2d\u8a08\u53c3\u8003\u8868\uff1a\u786c\u5ea6\u3001\u62c9\u4f38\u5f37\u5ea6\u8207\u6eab\u5ea6\u7bc4\u570d\">Design Reference Table: Hardness, Tensile Strength, and Temperature Range<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The table below summarizes commonly used grades for quick material selection:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>Hardness (Shore A)<\/th><th>Density (g\/cm\u00b3)<\/th><th>Tensile strength (MPa)<\/th><th>Continuous operating temperature (\u00b0C)<\/th><th>Typical uses<\/th><\/tr><\/thead><tbody><tr><td>30<\/td><td>1.12<\/td><td>7.0<\/td><td>-60 ~ 200<\/td><td>Baby pacifiers, medical catheters<\/td><\/tr><tr><td>50<\/td><td>1.14<\/td><td>8.5<\/td><td>-60 ~ 220<\/td><td>Car O-ring, food baking mold<\/td><\/tr><tr><td>70<\/td><td>1.17<\/td><td>9.0<\/td><td>-60 ~ 250<\/td><td>High-pressure sealing gaskets, semiconductor clamps<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Engineering Tips<\/strong>When designing compression seals, it is recommended to control the compression amount at 15\u201330 %; if the operating temperature exceeds 200 \u00b0C, it should be reduced to 10\u201320 % to avoid permanent deformation.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"\u7d50\u8a9e\">Conclusion<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The widespread adoption of silicone in industrial, consumer, and medical markets stems from the heat resistance, weather resistance, and chemical inertness of its Si-O backbone. Combined with diverse molding processes, this allows designers to flexibly balance hardness, color, transparency, and processing efficiency. By examining the property tables and process comparisons in this article, you can more accurately decide whether to choose a 30 Shore A medical-grade tubing or a 70 Shore A high-pressure seal. Understanding these scientific principles and reference parameters not only shortens development cycles but also ensures product quality from the outset.<\/p>","protected":false},"excerpt":{"rendered":"<p>\u77fd\u81a0\uff08Silicone Rubber\uff09\u56e0\u517c\u5177\u201060 \u00b0C \u4f4e\u6eab\u5ef6\u5c55\u6027\u8207 250 \u00b0C \u9ad8\u6eab\u7a69\u5b9a\u5ea6\uff0c\u88ab\u7a31\u70ba\u300c\u88fd\u9020 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":3401,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[45],"tags":[86,122,325,326],"class_list":["post-3400","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-industrial-knowledge","tag-86","tag-122","tag-325","tag-326"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.taichungbro.com\/en\/wp-json\/wp\/v2\/posts\/3400","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.taichungbro.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.taichungbro.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.taichungbro.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.taichungbro.com\/en\/wp-json\/wp\/v2\/comments?post=3400"}],"version-history":[{"count":0,"href":"https:\/\/www.taichungbro.com\/en\/wp-json\/wp\/v2\/posts\/3400\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.taichungbro.com\/en\/wp-json\/wp\/v2\/media\/3401"}],"wp:attachment":[{"href":"https:\/\/www.taichungbro.com\/en\/wp-json\/wp\/v2\/media?parent=3400"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.taichungbro.com\/en\/wp-json\/wp\/v2\/categories?post=3400"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.taichungbro.com\/en\/wp-json\/wp\/v2\/tags?post=3400"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}