{"id":4717,"date":"2025-05-16T06:36:27","date_gmt":"2025-05-16T06:36:27","guid":{"rendered":"https:\/\/machining-quote.com\/?p=4717"},"modified":"2025-05-16T06:36:36","modified_gmt":"2025-05-16T06:36:36","slug":"what-is-delrin","status":"publish","type":"post","link":"https:\/\/machining-quote.com\/ja\/bolg\/what-is-delrin\/","title":{"rendered":"What Is Delrin? A Complete Guide to the Acetal Homopolymer"},"content":{"rendered":"<p>Delrin is a brand name for acetal homopolymer resin. It is an engineering plastic known for strength, stiffness, and low friction. Industries use Delrin for gears, bearings, housings, and many moving parts. This guide explains Delrin\u2019s basic facts, key properties, processing options, and common applications in simple language.<\/p>\n\n<h4>\u76ee\u6b21<\/h4>\n<ul>\n  <li><a href=\"#definition\">1. Definition of Delrin<\/a><\/li>\n  <li><a href=\"#why-choose-delrin\">2. Why Choose Delrin?<\/a><\/li>\n  <li><a href=\"#key-properties\">3. Key Properties of Delrin<\/a><\/li>\n  <li><a href=\"#comparison\">4. Delrin vs Other Plastics<\/a><\/li>\n  <li><a href=\"#grades\">5. Main Grades of Delrin<\/a><\/li>\n  <li><a href=\"#processing\">6. Processing Methods<\/a><\/li>\n  <li><a href=\"#design-tips\">7. Design Tips for Delrin Parts<\/a><\/li>\n  <li><a href=\"#applications\">8. Industrial Applications<\/a><\/li>\n  <li><a href=\"#maintenance\">9. Care and Maintenance<\/a><\/li>\n  <li><a href=\"#sourcing\">10. How to Source Delrin<\/a><\/li>\n  <li><a href=\"#faqs\">11. FAQs<\/a><\/li>\n  <li><a href=\"#conclusion\">12. Conclusion<\/a><\/li>\n<\/ul>\n\n<hr>\n\n<h2 id=\"definition\">1. Definition of Delrin<\/h2>\n<p>Delrin is the trade name for acetal homopolymer made by DuPont (now DuPont-Celanese). Chemically, it is polyoxymethylene (POM). It appears as white or black granules and is molded into strong, precise parts.<\/p>\n\n<h2 id=\"why-choose-delrin\">2. Why Choose Delrin?<\/h2>\n<ul>\n  <li>High stiffness and strength.<\/li>\n  <li>Very low friction and wear.<\/li>\n  <li>Dimensional stability over a wide temperature range.<\/li>\n  <li>Resists many fuels, oils, and chemicals.<\/li>\n  <li>Good fatigue and impact performance.<\/li>\n<\/ul>\n\n<h2 id=\"key-properties\">3. Key Properties of Delrin<\/h2>\n<p>The table below lists typical property ranges for unfilled Delrin.<\/p>\n\n<table border=\"1\">\n  <thead>\n    <tr>\n      <th>\u30d7\u30ed\u30d1\u30c6\u30a3<\/th>\n      <th>Typical Value<\/th>\n      <th>Why It Matters<\/th>\n    <\/tr>\n  <\/thead>\n  <tbody>\n    <tr>\n      <td>\u5f15\u5f35\u5f37\u5ea6<\/td>\n      <td>60\u201370 MPa<\/td>\n      <td>Handles static loads<\/td>\n    <\/tr>\n    <tr>\n      <td>\u66f2\u3052\u5f3e\u6027\u7387<\/td>\n      <td>2.8 GPa<\/td>\n      <td>High stiffness<\/td>\n    <\/tr>\n    <tr>\n      <td>\u7834\u65ad\u4f38\u5ea6<\/td>\n      <td>20\u201340 %<\/td>\n      <td>\u512a\u308c\u305f\u976d\u6027<\/td>\n    <\/tr>\n    <tr>\n      <td>\u5bc6\u5ea6<\/td>\n      <td>1.41 g\/cm\u00b3<\/td>\n      <td>Lighter than metals<\/td>\n    <\/tr>\n    <tr>\n      <td>Operating Temp.<\/td>\n      <td>-40 \u00b0C to +105 \u00b0C<\/td>\n      <td>Wide service range<\/td>\n    <\/tr>\n    <tr>\n      <td>Water Absorption (24 h)<\/td>\n      <td>&lt;0.3 %<\/td>\n      <td>Stable dimensions<\/td>\n    <\/tr>\n    <tr>\n      <td>\u6469\u64e6\u4fc2\u6570<\/td>\n      <td>0.2 (dry vs steel)<\/td>\n      <td>Low wear in sliding<\/td>\n    <\/tr>\n  <\/tbody>\n<\/table>\n\n<h3>Mini Bar Chart: Relative Stiffness Index<\/h3>\n<pre>\nDelrin   \u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588  (100 %)\nNylon    \u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588    (80 %)\nABS      \u2588\u2588\u2588\u2588\u2588       (60 %)\nHDPE     \u2588\u2588\u2588         (30 %)\nRubber   \u2588           (10 %)\n<\/pre>\n<p>The bar chart uses simple text blocks to show how Delrin\u2019s stiffness compares to other common plastics.<\/p>\n\n<h2 id=\"comparison\">4. Delrin vs Other Plastics<\/h2>\n<table border=\"1\">\n  <thead>\n    <tr>\n      <th>\u7279\u5fb4<\/th>\n      <th>Delrin<\/th>\n      <th>\u30ca\u30a4\u30ed\u30f36<\/th>\n      <th>ABS<\/th>\n      <th>UHMW-PE<\/th>\n    <\/tr>\n  <\/thead>\n  <tbody>\n    <tr>\n      <td>\u5438\u6e7f<\/td>\n      <td>\u4f4e\u3044<\/td>\n      <td>\u9ad8\u3044<\/td>\n      <td>\u4f4e\u3044<\/td>\n      <td>Very low<\/td>\n    <\/tr>\n    <tr>\n      <td>Friction Coefficient<\/td>\n      <td>Very low<\/td>\n      <td>\u4f4e\u3044<\/td>\n      <td>\u4e2d\u7a0b\u5ea6<\/td>\n      <td>Ultra low<\/td>\n    <\/tr>\n    <tr>\n      <td>\u52a0\u5de5\u6027<\/td>\n      <td>\u7d20\u6674\u3089\u3057\u3044<\/td>\n      <td>\u30b0\u30c3\u30c9<\/td>\n      <td>\u30d5\u30a7\u30a2<\/td>\n      <td>\u96e3\u3057\u3044<\/td>\n    <\/tr>\n    <tr>\n      <td>Heat Distortion &deg;C<\/td>\n      <td>100<\/td>\n      <td>80<\/td>\n      <td>90<\/td>\n      <td>70<\/td>\n    <\/tr>\n    <tr>\n      <td>Relative Cost<\/td>\n      <td>\u30df\u30c7\u30a3\u30a2\u30e0<\/td>\n      <td>Low-medium<\/td>\n      <td>\u4f4e\u3044<\/td>\n      <td>\u9ad8\u3044<\/td>\n    <\/tr>\n  <\/tbody>\n<\/table>\n\n<h2 id=\"grades\">5. Main Grades of Delrin<\/h2>\n<table border=\"1\">\n  <thead>\n    <tr>\n      <th>\u30b0\u30ec\u30fc\u30c9<\/th>\n      <th>Filler or Additive<\/th>\n      <th>Main Benefit<\/th>\n    <\/tr>\n  <\/thead>\n  <tbody>\n    <tr>\n      <td>\u30c7\u30eb\u30ea\u30f3100AF<\/td>\n      <td>PTFE Lubricant<\/td>\n      <td>Ultra-low friction<\/td>\n    <\/tr>\n    <tr>\n      <td>Delrin Glass-Filled<\/td>\n      <td>25 % Glass Fiber<\/td>\n      <td>High stiffness<\/td>\n    <\/tr>\n    <tr>\n      <td>Delrin UV-Stabilized<\/td>\n      <td>UV Inhibitors<\/td>\n      <td>Better outdoor life<\/td>\n    <\/tr>\n    <tr>\n      <td>Delrin FDA<\/td>\n      <td>Food-grade<\/td>\n      <td>Safe for food contact<\/td>\n    <\/tr>\n    <tr>\n      <td>Delrin Low VOC<\/td>\n      <td>Low outgassing<\/td>\n      <td>Automotive interiors<\/td>\n    <\/tr>\n  <\/tbody>\n<\/table>\n\n<h2 id=\"processing\">6. Processing Methods<\/h2>\n<h3>\u5c04\u51fa\u6210\u5f62<\/h3>\n<p>Most Delrin parts are molded. Melt temperature is 190\u2013215&nbsp;&deg;C. Mold temperature is 80\u2013100&nbsp;&deg;C for best surface.<\/p>\n<h3>CNC\u52a0\u5de5<\/h3>\n<p>Delrin machines like soft metal. Sometime engineer use sharp HSS or carbide tools. Chips break cleanly, reducing dust. In <a href=\"https:\/\/www.tuofa-cncmachining.com\/plastic\/\" target=\"_blank\" rel=\"nofollow noopener\">TUOFA China Machining shop<\/a>, years of machining Delrin parts, would be a better choice to choose from for a project.<\/p>\n<h3>Extrusion and Rod Forming<\/h3>\n<p>Sheets, rods, and profiles are extruded for later machining or welding.<\/p>\n<h3>Welding and Bonding<\/h3>\n<p>Hot-gas welding works. Solvent bonding is hard because Delrin resists many chemicals. Mechanical fasteners are common.<\/p>\n\n<h2 id=\"design-tips\">7. Design Tips for Delrin Parts<\/h2>\n<ul>\n  <li>Add 1\u20132&nbsp;% shrinkage allowance for molding.<\/li>\n  <li>Use generous radii (0.5 mm+) to avoid stress cracks.<\/li>\n  <li>For gears, target 0.2\u20130.3 mm backlash to handle thermal growth.<\/li>\n  <li>Vent molds well to avoid gas traps and burn marks.<\/li>\n<\/ul>\n\n<h2 id=\"applications\">8. Industrial Applications<\/h2>\n<table border=\"1\">\n  <thead>\n    <tr>\n      <th>\u696d\u754c<\/th>\n      <th>Part Example<\/th>\n      <th>Reason for Delrin Choice<\/th>\n    <\/tr>\n  <\/thead>\n  <tbody>\n    <tr>\n      <td>\u81ea\u52d5\u8eca<\/td>\n      <td>Window gear<\/td>\n      <td>Low noise, high wear life<\/td>\n    <\/tr>\n    <tr>\n      <td>\u30a8\u30ec\u30af\u30c8\u30ed\u30cb\u30af\u30b9<\/td>\n      <td>Connector housing<\/td>\n      <td>Tight tolerance, dielectric<\/td>\n    <\/tr>\n    <tr>\n      <td>\u30e1\u30c7\u30a3\u30ab\u30eb<\/td>\n      <td>Insulin pump gear<\/td>\n      <td>Chemical resistance, precision<\/td>\n    <\/tr>\n    <tr>\n      <td>Consumer<\/td>\n      <td>Knife handle<\/td>\n      <td>Grip strength, machinability<\/td>\n    <\/tr>\n    <tr>\n      <td>\u7523\u696d<\/td>\n      <td>Conveyor roller<\/td>\n      <td>Low friction, moisture proof<\/td>\n    <\/tr>\n  <\/tbody>\n<\/table>\n\n<h2 id=\"maintenance\">9. Care and Maintenance<\/h2>\n<p>Delrin resists many chemicals but avoid prolonged contact with strong acids. Clean with mild soap and water. For moving parts, periodic silicone or PTFE lubrication can extend life. Avoid continuous use above 100&nbsp;&deg;C to prevent creep.<\/p>\n\n<h2 id=\"sourcing\">10. How to Source Delrin<\/h2>\n<ul>\n  <li>Buy certified resin or sheet from major distributors.<\/li>\n  <li>Check lot certifications for food-grade or medical grades.<\/li>\n  <li>Order sample pieces for prototype tests before large volume runs.<\/li>\n<\/ul>\n\n<h2 id=\"faqs\">11. FAQs<\/h2>\n<h3>Is Delrin stronger than nylon?<\/h3>\n<p>Delrin is stiffer but nylon is tougher. Choose based on need.<\/p>\n<h3>Can Delrin be 3D printed?<\/h3>\n<p>Special POM filaments exist, but printing requires a heated chamber.<\/p>\n<h3>Is Delrin food safe?<\/h3>\n<p>FDA grades are food safe. Confirm certification.<\/p>\n\n<h2 id=\"conclusion\">12. Conclusion<\/h2>\n<p>Delrin delivers a rare mix of strength, low friction, and chemical resistance in one material. With proper grade selection and design, it serves as a reliable choice for gears, bearings, housings, and many precise parts across industries. When you need stable dimensions, clean machining, and long wear life, Delrin is a smart solution.<\/p>","protected":false},"excerpt":{"rendered":"<p>Delrin is a brand name for acetal homopolymer resin. It is an engineering plastic known for strength, stiffness, and low friction. Industries use Delrin for gears, bearings, housings, and many moving parts. This guide explains Delrin\u2019s basic facts, key properties, processing options, and common applications in simple language. Table of Contents 1. Definition of Delrin 2. Why Choose Delrin? 3. Key Properties of Delrin 4. Delrin vs Other Plastics 5. Main Grades of Delrin 6. Processing Methods 7. Design Tips for Delrin Parts 8. Industrial Applications 9. Care and Maintenance 10. How to Source Delrin 11. FAQs 12. Conclusion 1. Definition of Delrin Delrin is the trade name for acetal [&hellip;]<\/p>","protected":false},"author":5,"featured_media":4718,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_gspb_post_css":"","content-type":"","footnotes":""},"categories":[3],"tags":[],"class_list":["post-4717","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-material-selection-guide"],"blocksy_meta":[],"_links":{"self":[{"href":"https:\/\/machining-quote.com\/ja\/wp-json\/wp\/v2\/posts\/4717","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/machining-quote.com\/ja\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/machining-quote.com\/ja\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/machining-quote.com\/ja\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/machining-quote.com\/ja\/wp-json\/wp\/v2\/comments?post=4717"}],"version-history":[{"count":1,"href":"https:\/\/machining-quote.com\/ja\/wp-json\/wp\/v2\/posts\/4717\/revisions"}],"predecessor-version":[{"id":4719,"href":"https:\/\/machining-quote.com\/ja\/wp-json\/wp\/v2\/posts\/4717\/revisions\/4719"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/machining-quote.com\/ja\/wp-json\/wp\/v2\/media\/4718"}],"wp:attachment":[{"href":"https:\/\/machining-quote.com\/ja\/wp-json\/wp\/v2\/media?parent=4717"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/machining-quote.com\/ja\/wp-json\/wp\/v2\/categories?post=4717"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/machining-quote.com\/ja\/wp-json\/wp\/v2\/tags?post=4717"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}