{"id":1312,"date":"2025-05-26T13:58:30","date_gmt":"2025-05-26T13:58:30","guid":{"rendered":"https:\/\/tengyiplastic.com\/?p=1312"},"modified":"2025-05-27T15:46:12","modified_gmt":"2025-05-27T15:46:12","slug":"understanding-the-difference-between-pom-c-and-pom-h","status":"publish","type":"post","link":"https:\/\/tengyiplastic.com\/pt\/understanding-the-difference-between-pom-c-and-pom-h\/","title":{"rendered":"Understanding the Difference Between POM-C and POM-H"},"content":{"rendered":"<h1 class=\"wp-block-heading\">Understanding the Difference Between POM-C and POM-H<\/h1>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1600\" height=\"900\" src=\"http:\/\/tengyiplastic.com\/wp-content\/uploads\/2025\/05\/pom-c-vs-pom-h-sample-comparison..jpg\" alt=\"POM-C and POM-H plastic sheet samples side by side\" class=\"wp-image-1262\"\/><figcaption class=\"wp-element-caption\">Comparison of POM-C and POM-H Sample Sheets<\/figcaption><\/figure>\n\n\n\n<p>When selecting acetal plastic for industrial use, it\u2019s important to understand the difference between <strong>POM-C (copolymer acetal)<\/strong> e <strong>POM-H (homopolymer acetal)<\/strong>. Though both materials fall under the acetal or polyoxymethylene (POM) family, they differ in molecular structure, performance characteristics, and processing behavior.<\/p>\n\n\n\n<p><strong>POM-C<\/strong>, or <strong>copolymer acetal<\/strong>, is known for its enhanced chemical resistance and lower porosity, making it suitable for applications involving moisture or aggressive cleaning agents. On the other hand, <strong>POM-H<\/strong>, also called <strong>homopolymer acetal<\/strong>, often recognized under the brand <strong>Delrin\u00ae<\/strong>, offers slightly better mechanical strength and stiffness, ideal for precision parts requiring high dimensional stability.<\/p>\n\n\n\n<p>Understanding the key differences between <strong>copolymer vs homopolymer acetal<\/strong> will help you choose the right material for gears, bushings, bearings, and other high-performance plastic components.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Comparison Table: POM-C vs POM-H (Acetal Copolymer vs Homopolymer)<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th><strong>Propriedade<\/strong><\/th><th><strong>POM-C (Copolymer Acetal)<\/strong><\/th><th><strong>POM-H (Homopolymer Acetal \/ Delrin\u00ae)<\/strong><\/th><\/tr><\/thead><tbody><tr><td><strong>Chemical Structure<\/strong><\/td><td>Copolymerized with multiple monomers for improved stability<\/td><td>Made from a single monomer (formaldehyde)<\/td><\/tr><tr><td><strong>Brand Examples<\/strong><\/td><td>Acetal Copolymer, CELCON\u00ae, Ultraform\u00ae<\/td><td>Delrin\u00ae, Kepital-H<\/td><\/tr><tr><td><strong>Mechanical Strength<\/strong><\/td><td>\u2b50\u2b50\u2b50\u2b50 Slightly lower than POM-H<\/td><td>\u2b50\u2b50\u2b50\u2b50\u2b50 Higher tensile and flexural strength<\/td><\/tr><tr><td><strong>Stiffness &amp; Rigidity<\/strong><\/td><td>\u2b50\u2b50\u2b50\u2b50 Good<\/td><td>\u2b50\u2b50\u2b50\u2b50\u2b50 Excellent<\/td><\/tr><tr><td><strong>Estabilidade dimensional<\/strong><\/td><td>\u2b50\u2b50\u2b50\u2b50 Stable, less sensitive to stress cracking<\/td><td>\u2b50\u2b50\u2b50\u2b50\u2b50 Very stable and precise<\/td><\/tr><tr><td><strong>Resist\u00eancia ao desgaste<\/strong><\/td><td>\u2b50\u2b50\u2b50\u2b50 Good<\/td><td>\u2b50\u2b50\u2b50\u2b50 Excellent, slightly better than POM-C<\/td><\/tr><tr><td><strong>Moisture Resistance<\/strong><\/td><td>\u2b50\u2b50\u2b50\u2b50\u2b50 Excellent \u2013 low porosity, better in wet environments<\/td><td>\u2b50\u2b50\u2b50 Medium \u2013 slightly more moisture absorption<\/td><\/tr><tr><td><strong>Resist\u00eancia qu\u00edmica<\/strong><\/td><td>\u2b50\u2b50\u2b50\u2b50\u2b50 Superior \u2013 resists acids, bases, fuels<\/td><td>\u2b50\u2b50\u2b50\u2b50 Good, but more sensitive to hydrolysis<\/td><\/tr><tr><td><strong>Friction &amp; Sliding Behavior<\/strong><\/td><td>\u2b50\u2b50\u2b50\u2b50 Low friction, good sliding properties<\/td><td>\u2b50\u2b50\u2b50\u2b50\u2b50 Ultra-low friction, better for dry-running parts<\/td><\/tr><tr><td><strong>Machinability<\/strong><\/td><td>\u2b50\u2b50\u2b50\u2b50 Easy to cut, drill, mill<\/td><td>\u2b50\u2b50\u2b50\u2b50\u2b50 Excellent surface finish, more rigid during machining<\/td><\/tr><tr><td><strong>Porosity<\/strong><\/td><td>Low \u2013 better for fluid-tight applications<\/td><td>Higher \u2013 may absorb more moisture over time<\/td><\/tr><tr><td><strong>Estabilidade t\u00e9rmica<\/strong><\/td><td>\u2b50\u2b50\u2b50 Stable up to ~100\u2013110\u00b0C<\/td><td>\u2b50\u2b50\u2b50\u2b50 Slightly higher stability, up to ~120\u00b0C<\/td><\/tr><tr><td><strong>Price<\/strong><\/td><td>\ud83d\udcb2\ud83d\udcb2 Affordable, widely used<\/td><td>\ud83d\udcb2\ud83d\udcb2\ud83d\udcb2 Slightly more expensive due to Delrin\u00ae brand premium<\/td><\/tr><tr><td><strong>Best Applications<\/strong><\/td><td>Food processing, pump housings, fluid-handling parts<\/td><td>Precision gears, tight-tolerance bushings, electrical insulators<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Practical Selection Advice for POM-C and POM-H<\/h2>\n\n\n\n<p><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Choose <strong>POM-C<\/strong> when <strong>resist\u00eancia qu\u00edmica<\/strong>, <strong>moisture stability<\/strong>e <strong>cost-efficiency<\/strong> are priorities \u2014 ideal for <strong>food equipment<\/strong>, <strong>fluid systems<\/strong>e <strong>general machine parts<\/strong>.<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Choose <strong>POM-H (Delrin\u00ae)<\/strong> for <strong>high-load precision parts<\/strong> requiring better <strong>mechanical strength<\/strong>, <strong>stiffness<\/strong>e <strong>machining accuracy<\/strong> \u2014 common in <strong>automotive<\/strong>, <strong>aerospace<\/strong>e <strong>gear systems<\/strong>.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Conclusioin<\/h2>\n\n\n\n<p>Understanding the technical and performance differences between <strong>POM-C (copolymer)<\/strong> e <strong>POM-H (homopolymer)<\/strong> is essential when choosing the right material for engineering applications. Each grade has its strengths\u2014POM-C offers better chemical resistance and dimensional stability, while POM-H provides higher stiffness and better wear performance under dry conditions. The right choice depends on your specific working environment, design requirements, and machining needs.<\/p>\n\n\n\n<p>At <strong>Pl\u00e1stico Tengyi<\/strong>, we supply both <strong>POM-C<\/strong> e <strong>POM-H<\/strong> sheets and rods, helping customers around the world find the most suitable solution for their industrial needs. If you\u2019re unsure which grade is right for your application, our team is ready to offer technical support and professional guidance.<\/p>\n\n\n\n<p>Contact us today to learn more about our POM materials and how we can support your project with quality products from China.<\/p>","protected":false},"excerpt":{"rendered":"<p>When selecting acetal plastic for industrial use, it\u2019s important to understand the difference between POM-C (copolymer acetal) and POM-H (homopolymer acetal). <\/p>","protected":false},"author":1,"featured_media":1262,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_uf_show_specific_survey":0,"_uf_disable_surveys":false,"footnotes":""},"categories":[72],"tags":[77,76,68,69,71],"class_list":["post-1312","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-all-about-pom","tag-derlin","tag-pom-h","tag-pom","tag-acetal","tag-polyoxymethylene"],"yoast_head":"<!-- This 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