{"id":15799,"date":"2026-02-03T14:43:36","date_gmt":"2026-02-03T13:43:36","guid":{"rendered":"https:\/\/www.ptfe-felis.com\/ptfe-coefficient-of-friction-vs-other-polymers\/"},"modified":"2026-08-17T16:27:05","modified_gmt":"2026-08-17T14:27:05","slug":"ptfe-coefficient-of-friction-vs-other-polymers","status":"publish","type":"page","link":"https:\/\/www.ptfe-felis.com\/en\/ptfe-coefficient-of-friction-vs-other-polymers\/","title":{"rendered":"PTFE coefficient of friction vs other polymers"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"15799\" class=\"elementor elementor-15799\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-b1053dc elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"b1053dc\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-8601704\" data-id=\"8601704\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-618b491 elementor-widget elementor-widget-heading\" data-id=\"618b491\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h1 class=\"elementor-heading-title elementor-size-default\">PTFE coefficient of friction vs other polymers<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-53a3d6e elementor-widget elementor-widget-text-editor\" data-id=\"53a3d6e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><strong data-start=\"88\" data-end=\"153\" data-is-last-node=\"\">Last update:\u00a0<\/strong>02\/2026<strong data-start=\"88\" data-end=\"153\" data-is-last-node=\"\">\u00a0| Written by:\u00a0<\/strong>Content Team<strong data-start=\"88\" data-end=\"153\" data-is-last-node=\"\"> | Reviewed by<\/strong><strong>:<\/strong> <a style=\"font-weight: bold; color: white;\" href=\"https:\/\/www.ptfe-felis.com\/federico-lipparini\/\">Federico Lipparini<\/a><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4d7388b elementor-widget__width-initial elementor-widget-tablet__width-initial elementor-align-left elementor-widget elementor-widget-button\" data-id=\"4d7388b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div 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data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"233\" height=\"300\" src=\"https:\/\/www.ptfe-felis.com\/wp-content\/uploads\/2026\/02\/PTFE-coefficient-of-friction-vs-other-polymers-233x300.png\" class=\"attachment-medium size-medium wp-image-18315\" alt=\"PTFE coefficient of friction vs other polymers\" srcset=\"https:\/\/www.ptfe-felis.com\/wp-content\/uploads\/2026\/02\/PTFE-coefficient-of-friction-vs-other-polymers-233x300.png 233w, https:\/\/www.ptfe-felis.com\/wp-content\/uploads\/2026\/02\/PTFE-coefficient-of-friction-vs-other-polymers-796x1024.png 796w, https:\/\/www.ptfe-felis.com\/wp-content\/uploads\/2026\/02\/PTFE-coefficient-of-friction-vs-other-polymers-768x988.png 768w, https:\/\/www.ptfe-felis.com\/wp-content\/uploads\/2026\/02\/PTFE-coefficient-of-friction-vs-other-polymers-1194x1536.png 1194w, https:\/\/www.ptfe-felis.com\/wp-content\/uploads\/2026\/02\/PTFE-coefficient-of-friction-vs-other-polymers.png 1555w\" sizes=\"(max-width: 233px) 100vw, 233px\" title=\"\">\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-d92d718 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"d92d718\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-33 elementor-top-column elementor-element elementor-element-2846ba9\" data-id=\"2846ba9\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-7bae476 elementor-widget elementor-widget-image\" data-id=\"7bae476\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"300\" height=\"300\" src=\"https:\/\/www.ptfe-felis.com\/wp-content\/uploads\/2025\/09\/ISO-1-300x300.png\" class=\"attachment-medium size-medium wp-image-8727\" alt=\"ISO\" srcset=\"https:\/\/www.ptfe-felis.com\/wp-content\/uploads\/2025\/09\/ISO-1-300x300.png 300w, https:\/\/www.ptfe-felis.com\/wp-content\/uploads\/2025\/09\/ISO-1-150x150.png 150w, https:\/\/www.ptfe-felis.com\/wp-content\/uploads\/2025\/09\/ISO-1.png 500w\" sizes=\"(max-width: 300px) 100vw, 300px\" title=\"\">\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3009b85 elementor-widget elementor-widget-heading\" data-id=\"3009b85\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\"><b>ISO<\/b><\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3bf2093 elementor-widget elementor-widget-text-editor\" data-id=\"3bf2093\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>International Organization for Standardization<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-33 elementor-top-column elementor-element elementor-element-6169536\" data-id=\"6169536\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-e2965a7 elementor-widget elementor-widget-image\" data-id=\"e2965a7\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"300\" height=\"300\" src=\"https:\/\/www.ptfe-felis.com\/wp-content\/uploads\/2025\/09\/FDA-2-300x300.png\" class=\"attachment-medium size-medium wp-image-8740\" alt=\"FDA\" srcset=\"https:\/\/www.ptfe-felis.com\/wp-content\/uploads\/2025\/09\/FDA-2-300x300.png 300w, https:\/\/www.ptfe-felis.com\/wp-content\/uploads\/2025\/09\/FDA-2-150x150.png 150w, https:\/\/www.ptfe-felis.com\/wp-content\/uploads\/2025\/09\/FDA-2.png 500w\" sizes=\"(max-width: 300px) 100vw, 300px\" title=\"\">\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5c9f8fb elementor-widget elementor-widget-heading\" data-id=\"5c9f8fb\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\"><b>FDA<\/b><\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-66e6342 elementor-widget elementor-widget-text-editor\" data-id=\"66e6342\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Administration for Foods and Drugs<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-33 elementor-top-column elementor-element elementor-element-88b94f0\" data-id=\"88b94f0\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-9f81df0 elementor-widget elementor-widget-image\" data-id=\"9f81df0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"300\" src=\"https:\/\/www.ptfe-felis.com\/wp-content\/uploads\/2025\/09\/RoHS-1-300x300.png\" class=\"attachment-medium size-medium wp-image-8748\" alt=\"RoHS\" srcset=\"https:\/\/www.ptfe-felis.com\/wp-content\/uploads\/2025\/09\/RoHS-1-300x300.png 300w, https:\/\/www.ptfe-felis.com\/wp-content\/uploads\/2025\/09\/RoHS-1-150x150.png 150w, https:\/\/www.ptfe-felis.com\/wp-content\/uploads\/2025\/09\/RoHS-1.png 500w\" sizes=\"(max-width: 300px) 100vw, 300px\" title=\"\">\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-bff854b elementor-widget elementor-widget-heading\" data-id=\"bff854b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\"><b>RoHS<\/b><\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1dfcfc0 elementor-widget elementor-widget-text-editor\" data-id=\"1dfcfc0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Restriction of Hazardous Substances<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-06754ff elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"06754ff\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-f8906c4\" data-id=\"f8906c4\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-2c917de elementor-widget elementor-widget-hfe-breadcrumbs-widget\" data-id=\"2c917de\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"hfe-breadcrumbs-widget.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<nav aria-label=\"Breadcrumb\"><ul class=\"hfe-breadcrumbs hfe-breadcrumbs-show-home\"><li class=\"hfe-breadcrumbs-item hfe-breadcrumbs-first\"><span class=\"hfe-breadcrumbs-home-icon\"><i aria-hidden=\"true\" class=\"fas fa-home\"><\/i><\/span><a href=\"https:\/\/www.ptfe-felis.com\/en\/\"><span class=\"hfe-breadcrumbs-text\"> Initial Page<\/span><\/a><\/li><\/ul><\/nav>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-fa83ea5 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"fa83ea5\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-ef29b69\" data-id=\"ef29b69\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-f7f26aa elementor-widget elementor-widget-text-editor\" data-id=\"f7f26aa\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Polytetrafluoroethylene (PTFE) is widely recognized for having one of the lowest coefficients of friction (CoF) of any solid engineering material. This characteristic, combined with chemical inertness, thermal stability, and low surface energy, makes PTFE a preferred choice for bearings, bushings, seals, valve seats, slide plates, conveyor components, and non-stick surfaces. In many mechanical systems, friction directly influences efficiency, wear rate, operating temperature, noise, and service life. As a result, understanding how PTFE compares with other polymers in terms of frictional behavior is essential for engineers involved in tribology, machine design, and materials selection.<\/span><\/p><p><span style=\"font-weight: 400;\">While several engineering plastics are marketed as \u201clow-friction,\u201d their performance varies significantly depending on load, speed, environment, and counter-surface material. Comparing PTFE with polymers such as UHMWPE, Nylon (PA), POM (acetal), polypropylene, PVC, and polycarbonate reveals why PTFE is often selected when friction reduction is the primary design objective. However, PTFE also has limitations including lower mechanical strength and creep resistance that must be considered alongside its friction advantages.<\/span><\/p><p><span style=\"font-weight: 400;\">This detailed technical discussion explains the coefficient of friction, typical values for PTFE, comparison with other polymers, molecular reasons for PTFE\u2019s low friction, tribological behavior under different conditions, design tradeoffs, and application guidance.<\/span><\/p><div style=\"margin: 40px 0; padding: 30px; background: #2c2cf6; border-radius: 8px; text-align: center;\"><h3 style=\"margin: 0 0 10px 0; font-size: 22px; color: #ffffff;\"><strong>Request Your PTFE Quote<\/strong><\/h3><p style=\"margin: 0 0 20px 0; font-size: 16px; color: #ffffff;\"><strong>Worldwide delivery and certified PTFE products.<\/strong><\/p><p><a style=\"display: inline-block; padding: 14px 28px; background: white; color: #000000; text-decoration: none; font-size: 16px; font-weight: 600; border-radius: 6px;\" href=\"https:\/\/www.ptfe-felis.com\/en\/contact-ptfe-felis\/\" target=\"_blank\" rel=\"follow noopener\">Get a Free Quote<br \/><\/a><\/p><\/div><h2><b>1. What Is Coefficient of Friction?<\/b><\/h2><p><span style=\"font-weight: 400;\">The <a href=\"https:\/\/www.ptfe-felis.com\/en\/coefficient-of-friction\/\">coefficient of friction (CoF)<\/a> is a dimensionless parameter that describes the ratio between the frictional force resisting motion and the normal force pressing two surfaces together. It is a system property, meaning it depends on both contacting materials and operating conditions, not just one material alone.<\/span><\/p><p><span style=\"font-weight: 400;\">The basic relation is:<\/span><\/p><p><b>Ff = \u03bc \u00b7 Fn<\/b><\/p><p><span style=\"font-weight: 400;\">Where:<\/span><\/p><ul><li style=\"font-weight: 400;\" aria-level=\"1\"><b>Ff<\/b><span style=\"font-weight: 400;\"> = frictional force<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><b>\u03bc (mu)<\/b><span style=\"font-weight: 400;\"> = coefficient of friction<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><b>Fn<\/b><span style=\"font-weight: 400;\"> = normal force<\/span><\/li><\/ul><p><span style=\"font-weight: 400;\">Two primary forms are used in engineering practice:<\/span><\/p><p><b>Static coefficient of friction<\/b><span style=\"font-weight: 400;\"> &#8211; the ratio measured just before sliding begins. This determines breakaway force and start-up torque.<\/span><\/p><p><b>Dynamic (kinetic) coefficient of friction<\/b><span style=\"font-weight: 400;\"> &#8211; the ratio measured during steady sliding motion. This influences running efficiency and heat generation.<\/span><\/p><p><span style=\"font-weight: 400;\">General interpretation:<\/span><\/p><ul><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Lower CoF \u2192 easier sliding, lower energy loss, less heat generation<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Higher CoF \u2192 greater resistance, more wear, more frictional heating<\/span><\/li><\/ul><p><span style=\"font-weight: 400;\">CoF is affected by:<\/span><\/p><ul><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Surface roughness<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Contact pressure<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Sliding speed<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Temperature<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Lubrication<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Environment (dry, wet, chemical exposure)<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Transfer film formation<\/span><\/li><\/ul><p><span style=\"font-weight: 400;\">Because of these dependencies, friction values are usually given as ranges rather than single numbers.<\/span><\/p><h2><b>2. Typical Coefficient of Friction for PTFE<\/b><\/h2><p><span style=\"font-weight: 400;\"><a href=\"https:\/\/www.ptfe-felis.com\/en\/what-is-ptfe\/\">PTFE<\/a> exhibits exceptionally low friction compared with most <a href=\"https:\/\/www.ptfe-felis.com\/en\/polymers\/\">polymers<\/a> and metals.<\/span><\/p><p><span style=\"font-weight: 400;\">Typical ranges (dry sliding against polished steel):<\/span><\/p><ul><li style=\"font-weight: 400;\" aria-level=\"1\"><b>Static CoF:<\/b><span style=\"font-weight: 400;\"> ~0.05-0.10<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><b>Dynamic CoF:<\/b><span style=\"font-weight: 400;\"> ~0.04-0.20<\/span><\/li><\/ul><p><span style=\"font-weight: 400;\">Under optimized conditions with smooth counter-surfaces and moderate loads, values can approach the lower end of these ranges. Under rough surfaces or high loads, values increase.<\/span><\/p><p><span style=\"font-weight: 400;\">Engineering implications include:<\/span><\/p><ul><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Very low breakaway force<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Reduced drive power requirements<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Lower interface temperatures<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Reduced stick slip behavior<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Smooth motion at low speeds<\/span><\/li><\/ul><p><span style=\"font-weight: 400;\">PTFE is often described as <\/span><b>self-lubricating<\/b><span style=\"font-weight: 400;\"> because it can provide low friction without added oil or grease. During sliding, PTFE tends to form a thin transfer film on the opposing surface, which further reduces shear resistance.<\/span><\/p><h2><b>3. Comparison with Other Common Polymers<\/b><\/h2><p><span style=\"font-weight: 400;\">Many engineering polymers offer moderate to good tribological behavior, but most do not reach PTFE\u2019s friction performance.<\/span><\/p><p><span style=\"font-weight: 400;\">Typical dry sliding CoF ranges vs steel:<\/span><\/p><table><tbody><tr><td><b>Polymer<\/b><\/td><td><b>Static CoF<\/b><\/td><td><b>Dynamic CoF<\/b><\/td><td><b>General Behavior<\/b><\/td><\/tr><tr><td><b>PTFE<\/b><\/td><td><span style=\"font-weight: 400;\">0.05-0.10<\/span><\/td><td><span style=\"font-weight: 400;\">0.04-0.20<\/span><\/td><td><span style=\"font-weight: 400;\">Extremely low friction, transfer film forming<\/span><\/td><\/tr><tr><td><b>UHMWPE<\/b><\/td><td><span style=\"font-weight: 400;\">0.15-0.25<\/span><\/td><td><span style=\"font-weight: 400;\">0.10-0.20<\/span><\/td><td><span style=\"font-weight: 400;\">Low friction, excellent wear resistance<\/span><\/td><\/tr><tr><td><b>Nylon (PA)<\/b><\/td><td><span style=\"font-weight: 400;\">0.20-0.40<\/span><\/td><td><span style=\"font-weight: 400;\">0.15-0.35<\/span><\/td><td><span style=\"font-weight: 400;\">Moderate friction, moisture sensitive<\/span><\/td><\/tr><tr><td><b>POM (Acetal)<\/b><\/td><td><span style=\"font-weight: 400;\">0.20-0.30<\/span><\/td><td><span style=\"font-weight: 400;\">0.15-0.25<\/span><\/td><td><span style=\"font-weight: 400;\">Good sliding, dimensionally stable<\/span><\/td><\/tr><tr><td><b>Polypropylene<\/b><\/td><td><span style=\"font-weight: 400;\">0.25-0.40<\/span><\/td><td><span style=\"font-weight: 400;\">0.20-0.35<\/span><\/td><td><span style=\"font-weight: 400;\">Moderate friction, softer surface<\/span><\/td><\/tr><tr><td><b>PVC<\/b><\/td><td><span style=\"font-weight: 400;\">0.30-0.50<\/span><\/td><td><span style=\"font-weight: 400;\">0.25-0.40<\/span><\/td><td><span style=\"font-weight: 400;\">Higher friction, more drag<\/span><\/td><\/tr><tr><td><b>Polycarbonate<\/b><\/td><td><span style=\"font-weight: 400;\">0.30-0.50<\/span><\/td><td><span style=\"font-weight: 400;\">0.25-0.40<\/span><\/td><td><span style=\"font-weight: 400;\">Tough but not low-friction<\/span><\/td><\/tr><\/tbody><\/table><p><span style=\"font-weight: 400;\">Key observations:<\/span><\/p><ul><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">PTFE consistently ranks lowest in CoF among common polymers.<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">UHMWPE is the closest competitor in low-friction performance, but typically still higher than PTFE.<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Nylon and POM provide balanced wear + strength but not ultra-low friction.<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Commodity plastics like PVC and PC show significantly higher friction.<\/span><\/li><\/ul><p><span style=\"font-weight: 400;\">Important design note: <\/span><b>low friction does not automatically mean low wear<\/b><span style=\"font-weight: 400;\">. Some materials show low CoF but higher wear rates under load. Friction and wear must be evaluated separately.<\/span><\/p><h2><b>4. Molecular Reasons Why PTFE Has Extremely Low Friction<\/b><\/h2><p><span style=\"font-weight: 400;\">PTFE\u2019s friction behavior originates directly from its molecular and surface structure.<\/span><\/p><h3><b>Fluorine-Rich Surface Layer<\/b><\/h3><p><span style=\"font-weight: 400;\">PTFE consists of repeating -CF\u2082-CF\u2082- chains. The outer surface is dominated by fluorine atoms. These atoms:<\/span><\/p><ul><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Are highly electronegative<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Are tightly bound<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Form a dense outer shell<\/span><\/li><\/ul><p><span style=\"font-weight: 400;\">This produces very weak intermolecular attraction with opposing surfaces, reducing adhesive friction.<\/span><\/p><h3><b>Very Low Surface Energy<\/b><\/h3><p><span style=\"font-weight: 400;\">PTFE has surface energy around <\/span><b>~18 mN\/m<\/b><span style=\"font-weight: 400;\">, among the lowest of solid materials. Low surface energy means:<\/span><\/p><ul><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Poor adhesion<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Weak interfacial bonding<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Minimal junction growth at contact spots<\/span><\/li><\/ul><p><span style=\"font-weight: 400;\">Lower adhesion directly lowers the adhesive component of friction.<\/span><\/p><h3><b>Low Shear Strength of Surface Film<\/b><\/h3><p><span style=\"font-weight: 400;\">PTFE has low shear strength at the interface. Under sliding load, the near-surface molecular layers shear easily. This reduces tangential resistance.<\/span><\/p><h3><b>Transfer Film Formation<\/b><\/h3><p><span style=\"font-weight: 400;\">During sliding, PTFE often deposits a microscopically thin transfer film onto the counter-surface. Sliding then occurs between PTFE and PTFE-like film rather than PTFE and metal. This stabilizes and lowers friction.<\/span><\/p><h3><b>Chain Mobility and Molecular Slip<\/b><\/h3><p><span style=\"font-weight: 400;\">Although PTFE is crystalline, chain segments in amorphous regions can reorient under shear. This molecular slip contributes to self-lubricating behavior.<\/span><\/p><h2><b>5. PTFE vs UHMWPE in Tribological Use<\/b><\/h2><p><span style=\"font-weight: 400;\">UHMWPE (ultra-high-molecular-weight polyethylene) is often compared with PTFE.<\/span><\/p><p><b>UHMWPE advantages:<\/b><\/p><ul><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Better wear resistance under load<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Higher impact strength<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Lower <a href=\"https:\/\/www.ptfe-felis.com\/en\/creep\/\">creep<\/a> than virgin PTFE<\/span><\/li><\/ul><p><b>PTFE advantages:<\/b><\/p><ul><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Lower CoF<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Better temperature resistance<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Superior chemical resistance<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Better non-stick behavior<\/span><\/li><\/ul><p><span style=\"font-weight: 400;\">Engineering tradeoff:<\/span><\/p><ul><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Choose <\/span><b>PTFE<\/b><span style=\"font-weight: 400;\"> when lowest friction is critical.<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Choose <\/span><b>UHMWPE<\/b><span style=\"font-weight: 400;\"> when wear life under load is more critical than absolute minimum friction.<\/span><\/li><\/ul><h2><b>6. Applications That Leverage PTFE\u2019s Low Friction<\/b><\/h2><h3><b>Bearings and Bushings<\/b><\/h3><p><span style=\"font-weight: 400;\">PTFE-lined or filled PTFE bearings operate with:<\/span><\/p><ul><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">No liquid lubrication<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Low start torque<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Chemical resistance<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Quiet operation<\/span><\/li><\/ul><p><span style=\"font-weight: 400;\">Common in valves, pumps, and food equipment.<\/span><\/p><h3><b>Seals and Valve Seats<\/b><\/h3><p><span style=\"font-weight: 400;\">Low friction reduces:<\/span><\/p><ul><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Actuation force<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Wear during cycling<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Heat generation<\/span><\/li><\/ul><p><span style=\"font-weight: 400;\">Important in chemical and high-purity systems.<\/span><\/p><h3><b>Slide Plates and Guide Rails<\/b><\/h3><p><span style=\"font-weight: 400;\">Used in bridges, heavy machinery, and conveyors where smooth sliding under load is needed.<\/span><\/p><h3><b>Non-Stick and Release Surfaces<\/b><\/h3><p><span style=\"font-weight: 400;\">Low friction + low adhesion supports:<\/span><\/p><ul><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Mold release films<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Packaging heat-seal bars<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Cookware coatings<\/span><\/li><\/ul><h3><b>Medical Devices<\/b><\/h3><p><span style=\"font-weight: 400;\">PTFE is used in:<\/span><\/p><ul><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Catheter liners<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Guide components<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Implant interfaces<\/span><\/li><\/ul><p><span style=\"font-weight: 400;\">Low friction reduces tissue trauma and insertion force.<\/span><\/p><h2><b>7. Factors That Affect PTFE Friction Performance<\/b><\/h2><p><span style=\"font-weight: 400;\">PTFE\u2019s CoF is not constant it varies with operating conditions.<\/span><\/p><h3><b>Surface Finish of Counterface<\/b><\/h3><ul><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Smooth steel \u2192 lower CoF<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Rough surface \u2192 higher CoF and wear<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Polished or coated counterfaces improve performance<\/span><\/li><\/ul><h3><b>Load and Contact Pressure<\/b><\/h3><ul><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Moderate load helps form stable transfer film<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Very high load increases deformation and friction<\/span><\/li><\/ul><h3><b>Sliding Speed<\/b><\/h3><ul><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Low speed \u2192 more stick\u2013slip risk<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Moderate speed \u2192 stable low friction<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Very high speed \u2192 frictional heating effects<\/span><\/li><\/ul><h3><b>Temperature<\/b><\/h3><ul><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Rising temperature softens PTFE surface<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Can increase friction and wear at extremes<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Still usable across wide temperature range<\/span><\/li><\/ul><h3><b>Environment<\/b><\/h3><ul><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Dry vs wet vs chemically exposed conditions change transfer film behavior.<\/span><\/li><\/ul><h3><b>Fillers and Compounds<\/b><\/h3><p><span style=\"font-weight: 400;\">Filled PTFE grades include:<\/span><\/p><ul><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Glass-filled<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Carbon-filled<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Bronze-filled<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Graphite-filled<\/span><\/li><\/ul><p><span style=\"font-weight: 400;\">Effects:<\/span><\/p><ul><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Usually <\/span><b>increase wear resistance<\/b><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">May slightly increase or sometimes decrease CoF<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Greatly improve load capacity<\/span><\/li><\/ul><h2><b>8. Engineering Limitations and Tradeoffs<\/b><\/h2><p><span style=\"font-weight: 400;\">Despite its friction advantages, PTFE has mechanical limitations:<\/span><\/p><ul><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Low modulus and strength<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Creep under sustained load<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Cold flow<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Lower wear resistance than some filled polymers<\/span><\/li><\/ul><p><span style=\"font-weight: 400;\">Design responses include:<\/span><\/p><ul><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Using filled PTFE grades<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Adding backing structures<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Limiting contact pressure<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Using composite bearing designs<\/span><\/li><\/ul><p><span style=\"font-weight: 400;\">Thus, PTFE is best viewed as a <\/span><b>low-friction surface material<\/b><span style=\"font-weight: 400;\">, not a high-load structural plastic.<\/span><\/p><h2><b>Conclusion<\/b><\/h2><p><span style=\"font-weight: 400;\">PTFE exhibits the lowest coefficient of friction among widely used engineering polymers due to its <a href=\"https:\/\/www.ptfe-felis.com\/en\/fluorine\/\">fluorine<\/a> rich surface, extremely low surface energy, low interfacial shear strength, and transfer film formation. Compared with polymers such as UHMWPE, Nylon, POM, polypropylene, PVC, and polycarbonate, PTFE consistently delivers superior sliding behavior and minimal adhesive friction. These properties make it indispensable in bearings, seals, sliding interfaces, release surfaces, and precision mechanical systems.<\/span><\/p><p><span style=\"font-weight: 400;\">However, optimal engineering use requires balancing its ultra-low friction against its lower mechanical strength and creep resistance. With proper design including fillers, composites, and structural support PTFE remains one of the most effective friction-reducing materials available for industrial and mechanical applications.<\/span><\/p><h2><b>Frequently Asked Questions (FAQs)<\/b><\/h2><p><b>Why is PTFE friction lower than Nylon or POM?<\/b><b><br \/><\/b><span style=\"font-weight: 400;\"> Because its fluorine-rich, low-energy surface produces very weak adhesive interaction and low shear strength at the interface.<\/span><\/p><p><b>Is PTFE always the best low-friction polymer?<\/b><b><br \/><\/b><span style=\"font-weight: 400;\"> For lowest CoF, yes but not always for wear or load capacity. Filled PTFE or UHMWPE may be better under heavy load.<\/span><\/p><p><b>Does PTFE need lubrication?<\/b><b><br \/><\/b><span style=\"font-weight: 400;\"> Often no. It is self-lubricating, though lubrication can further extend wear life.<\/span><\/p><p><b>Do fillers change PTFE friction?<\/b><b><br \/><\/b><span style=\"font-weight: 400;\"> Yes. Fillers usually improve wear resistance and load capacity, with modest effect on CoF.<\/span><\/p><p><b>What industries benefit most from PTFE low friction?<\/b><b><br \/><\/b><span style=\"font-weight: 400;\"> Chemical processing, aerospace, food equipment, medical devices, valves, pumps, and precision machinery.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-ef89756 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"ef89756\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-ff5b3e3\" data-id=\"ff5b3e3\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-cb144a8 elementor-widget elementor-widget-heading\" data-id=\"cb144a8\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Related Post<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-cccafc0 elementor-widget elementor-widget-text-editor\" data-id=\"cccafc0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<ol><li><a href=\"https:\/\/www.ptfe-felis.com\/en\/ptfe-creep-behavior-under-continuous-load\/\"><span data-sheets-root=\"1\">PTFE creep behavior under continuous load<\/span><\/a><\/li><li><a href=\"https:\/\/www.ptfe-felis.com\/en\/ptfe-thermal-expansion-challenges-in-design\/\"><span data-sheets-root=\"1\">PTFE thermal expansion challenges in design<\/span><\/a><\/li><li><a href=\"https:\/\/www.ptfe-felis.com\/en\/ptfe-performance-under-vacuum-conditions\/\"><span data-sheets-root=\"1\">PTFE performance under vacuum conditions<\/span><\/a><\/li><li><a href=\"https:\/\/www.ptfe-felis.com\/en\/top-plain-bearing-manufacturers-in-thailand\/\"><span data-sheets-root=\"1\">Top Plain Bearing Manufacturers in Thailand<\/span><\/a><\/li><\/ol>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>PTFE coefficient of friction vs other polymers Last update:\u00a002\/2026\u00a0| Written by:\u00a0Content Team | Reviewed by: Federico Lipparini Contact ISO International Organization for Standardization FDA Administration for Foods and Drugs RoHS Restriction of Hazardous Substances Initial Page Polytetrafluoroethylene (PTFE) is widely recognized for having one of the lowest coefficients of friction (CoF) of any solid engineering [&hellip;]<\/p>\n","protected":false},"author":8,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-15799","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.ptfe-felis.com\/en\/wp-json\/wp\/v2\/pages\/15799","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ptfe-felis.com\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.ptfe-felis.com\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.ptfe-felis.com\/en\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ptfe-felis.com\/en\/wp-json\/wp\/v2\/comments?post=15799"}],"version-history":[{"count":36,"href":"https:\/\/www.ptfe-felis.com\/en\/wp-json\/wp\/v2\/pages\/15799\/revisions"}],"predecessor-version":[{"id":45684,"href":"https:\/\/www.ptfe-felis.com\/en\/wp-json\/wp\/v2\/pages\/15799\/revisions\/45684"}],"wp:attachment":[{"href":"https:\/\/www.ptfe-felis.com\/en\/wp-json\/wp\/v2\/media?parent=15799"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}