{"id":803,"date":"2026-06-02T06:56:04","date_gmt":"2026-06-02T06:56:04","guid":{"rendered":"https:\/\/www.coefficientfriction.com\/?page_id=803"},"modified":"2026-06-02T07:58:58","modified_gmt":"2026-06-02T07:58:58","slug":"astm-g143","status":"publish","type":"page","link":"https:\/\/www.coefficientfriction.com\/vi\/astm-g143","title":{"rendered":"ASTM G143"},"content":{"rendered":"<div data-elementor-type=\"wp-page\" data-elementor-id=\"803\" class=\"elementor elementor-803\" data-elementor-post-type=\"page\">\n\t\t\t\t<div class=\"elementor-element elementor-element-d704b83 e-flex e-con-boxed e-con e-parent\" data-id=\"d704b83\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-d2347d4 e-con-full e-flex e-con e-child\" data-id=\"d2347d4\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-4aa5d8c elementor-widget elementor-widget-image\" data-id=\"4aa5d8c\" data-element_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=\"100\" src=\"https:\/\/www.coefficientfriction.com\/wp-content\/uploads\/2026\/06\/ASTM-G143.webp\" class=\"attachment-large size-large wp-image-805\" alt=\"ASTM G143\" srcset=\"https:\/\/www.coefficientfriction.com\/wp-content\/uploads\/2026\/06\/ASTM-G143.webp 300w, https:\/\/www.coefficientfriction.com\/wp-content\/uploads\/2026\/06\/ASTM-G143-18x6.webp 18w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/>\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-451ac2e elementor-widget elementor-widget-heading\" data-id=\"451ac2e\" data-element_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\">ASTM G143<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-86af503 elementor-widget elementor-widget-heading\" data-id=\"86af503\" data-element_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\">Standard Test Method for Measurement of Web\/Roller Friction Characteristics<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-b5ebfc9 e-con-full e-flex e-con e-child\" data-id=\"b5ebfc9\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-c7c7559 elementor-widget elementor-widget-text-editor\" data-id=\"c7c7559\" data-element_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 data-start=\"429\" data-end=\"858\"><strong data-start=\"429\" data-end=\"442\">ASTM G143<\/strong> is a standardized test method used to evaluate the friction behavior between a flexible web material and a cylindrical roller surface. The method measures both the static and kinetic coefficient of friction (COF) during sliding contact and helps manufacturers understand how web materials interact with rollers in converting, printing, packaging, coating, laminating, and other continuous web-processing operations.<\/p><p data-start=\"860\" data-end=\"1233\">Unlike conventional flat-surface friction tests, ASTM G143 focuses specifically on <strong data-start=\"943\" data-end=\"978\">roller\/web friction measurement<\/strong>, simulating real production conditions where films, paper, foils, textiles, and other flexible materials travel across rollers. The resulting friction data can be used for process optimization, material development, equipment design, and quality control.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-77d973a e-flex e-con-boxed e-con e-parent\" data-id=\"77d973a\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-29344a9 elementor-widget elementor-widget-heading\" data-id=\"29344a9\" data-element_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\">Why ASTM G143 Testing Is Important<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c31e0c9 elementor-widget elementor-widget-text-editor\" data-id=\"c31e0c9\" data-element_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 data-start=\"1279\" data-end=\"1488\">In many manufacturing processes, flexible materials are transported through a series of driven and idler rollers. The friction characteristics between the web and roller directly influence machine performance.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-19f63ba e-con-full e-grid e-con e-child\" data-id=\"19f63ba\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-3354326 elementor-widget elementor-widget-text-editor\" data-id=\"3354326\" data-element_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 data-start=\"1490\" data-end=\"1513\">If friction is too low:<\/p><ul data-start=\"1515\" data-end=\"1640\"><li data-section-id=\"g7o52g\" data-start=\"1515\" data-end=\"1545\">Material may slip on rollers<\/li><li data-section-id=\"11psfe7\" data-start=\"1546\" data-end=\"1577\">Registration errors may occur<\/li><li data-section-id=\"kaueoe\" data-start=\"1578\" data-end=\"1612\">Web tracking can become unstable<\/li><li data-section-id=\"1wb1y50\" data-start=\"1613\" data-end=\"1640\">Product damage may result<\/li><\/ul>\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-2467481 elementor-widget elementor-widget-text-editor\" data-id=\"2467481\" data-element_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 data-start=\"1642\" data-end=\"1666\">If friction is too high:<\/p><ul data-start=\"1668\" data-end=\"1818\"><li data-section-id=\"1gocjer\" data-start=\"1668\" data-end=\"1703\">Excessive motor loads may develop<\/li><li data-section-id=\"13zh7hq\" data-start=\"1704\" data-end=\"1744\">Steering and tracking issues may occur<\/li><li data-section-id=\"10tu6rr\" data-start=\"1745\" data-end=\"1774\">Surface damage may increase<\/li><li data-section-id=\"8inqks\" data-start=\"1775\" data-end=\"1818\">Material handling efficiency may decrease<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9adc4f5 elementor-widget elementor-widget-text-editor\" data-id=\"9adc4f5\" data-element_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>By performing an <strong data-start=\"1837\" data-end=\"1879\">ASTM G143 coefficient of friction test<\/strong>, manufacturers can quantify roller\/web interaction and make informed decisions regarding material selection, roller coatings, lubricants, and process parameters.<\/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\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-4712be6 e-flex e-con-boxed e-con e-parent\" data-id=\"4712be6\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-a8dc215 elementor-widget elementor-widget-heading\" data-id=\"a8dc215\" data-element_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\">What Is Measured in ASTM G143?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3233171 elementor-widget elementor-widget-text-editor\" data-id=\"3233171\" data-element_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 data-start=\"2083\" data-end=\"2103\">The test determines:<\/p><div class=\"TyagGW_tableContainer\"><div class=\"group TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\"><table class=\"w-fit min-w-(--thread-content-width)\" data-start=\"2105\" data-end=\"2516\"><thead data-start=\"2105\" data-end=\"2132\"><tr data-start=\"2105\" data-end=\"2132\"><th class=\"last:pe-10\" data-start=\"2105\" data-end=\"2117\" data-col-size=\"md\">Parameter<\/th><th class=\"last:pe-10\" data-start=\"2117\" data-end=\"2132\" data-col-size=\"md\">Description<\/th><\/tr><\/thead><tbody data-start=\"2162\" data-end=\"2516\"><tr data-start=\"2162\" data-end=\"2251\"><td style=\"text-align: center;\" data-start=\"2162\" data-end=\"2208\" data-col-size=\"md\">Static Coefficient of Friction (Static COF)<\/td><td style=\"text-align: center;\" data-start=\"2208\" data-end=\"2251\" data-col-size=\"md\">Resistance to the initiation of sliding<\/td><\/tr><tr data-start=\"2252\" data-end=\"2340\"><td style=\"text-align: center;\" data-start=\"2252\" data-end=\"2300\" data-col-size=\"md\">Kinetic Coefficient of Friction (Dynamic COF)<\/td><td style=\"text-align: center;\" data-start=\"2300\" data-end=\"2340\" data-col-size=\"md\">Resistance during continuous sliding<\/td><\/tr><tr data-start=\"2341\" data-end=\"2408\"><td style=\"text-align: center;\" data-start=\"2341\" data-end=\"2358\" data-col-size=\"md\">Friction Force<\/td><td style=\"text-align: center;\" data-start=\"2358\" data-end=\"2408\" data-col-size=\"md\">Force required to move the web over the roller<\/td><\/tr><tr data-start=\"2409\" data-end=\"2516\"><td style=\"text-align: center;\" data-start=\"2409\" data-end=\"2450\" data-col-size=\"md\">Roller\/Web Interaction Characteristics<\/td><td style=\"text-align: center;\" data-start=\"2450\" data-end=\"2516\" data-col-size=\"md\">Overall friction behavior under simulated operating conditions<\/td><\/tr><\/tbody><\/table><\/div><\/div><p data-start=\"2518\" data-end=\"2570\">These measurements provide valuable information for:<\/p><ul data-start=\"2572\" data-end=\"2702\"><li data-section-id=\"1o2zig4\" data-start=\"2572\" data-end=\"2589\">Process control<\/li><li data-section-id=\"hdv7ya\" data-start=\"2590\" data-end=\"2608\">Roller selection<\/li><li data-section-id=\"11vjoz6\" data-start=\"2609\" data-end=\"2637\">Surface coating evaluation<\/li><li data-section-id=\"1gsp2x2\" data-start=\"2638\" data-end=\"2660\">Lubricant assessment<\/li><li data-section-id=\"1wzx7yo\" data-start=\"2661\" data-end=\"2682\">Product development<\/li><li data-section-id=\"1y5e8wa\" data-start=\"2683\" data-end=\"2702\">Quality assurance<\/li><\/ul>\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\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-2944a56 e-flex e-con-boxed e-con e-parent\" data-id=\"2944a56\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-b28608e elementor-widget elementor-widget-heading\" data-id=\"b28608e\" data-element_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\">Testing Principle of ASTM G143<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-829d028 elementor-widget elementor-widget-text-editor\" data-id=\"829d028\" data-element_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 data-start=\"2744\" data-end=\"2833\">The <strong data-start=\"2748\" data-end=\"2789\">cof test method of roller web systems<\/strong> is based on the capstan friction principle.<\/p><p data-start=\"2835\" data-end=\"3060\">A narrow strip of web material is wrapped around a stationary cylindrical roller at a specified wrap angle. One end of the specimen is attached to a force-measuring device while a known tension is applied to the opposite end.<\/p><p data-start=\"3062\" data-end=\"3279\">As the specimen slides across the roller surface, the force required to overcome friction is continuously measured. The static and kinetic coefficients of friction are then calculated from the measured tension values.<\/p><p data-start=\"3281\" data-end=\"3330\">The calculation is based on the capstan equation:<\/p><div style=\"display: flex; align-items: center; justify-content: center; font-family: 'Times New Roman', Times, serif; font-size: 1.3rem; font-style: italic;\"><p><span style=\"margin-right: 8px; font-size: 1.4rem;\">\u03bc =<\/span><\/p><div style=\"display: flex; flex-direction: column; align-items: center; text-align: center;\"><p><span style=\"padding: 0 4px; line-height: 1.2;\">ln(T<sub>2<\/sub>\/T<sub>1<\/sub>)<\/span><\/p><div style=\"width: 100%; height: 1px; background-color: #000; margin: 2px 0;\">\u00a0<\/div><p><span style=\"padding: 0 4px; line-height: 1.2;\">\u03b8<\/span><\/p><\/div><\/div><p data-start=\"3371\" data-end=\"3377\">Where:<\/p><ul data-start=\"3379\" data-end=\"3491\"><li data-section-id=\"m1vref\" data-start=\"3379\" data-end=\"3408\">\u03bc = coefficient of friction<\/li><li data-section-id=\"127wvr7\" data-start=\"3409\" data-end=\"3436\">T\u2082 = higher tension force<\/li><li data-section-id=\"1s18gq\" data-start=\"3437\" data-end=\"3463\">T\u2081 = lower tension force<\/li><li data-section-id=\"1wh7x0d\" data-start=\"3464\" data-end=\"3491\">\u03b8 = wrap angle in radians<\/li><\/ul><p data-start=\"3493\" data-end=\"3613\">This approach enables realistic simulation of web transport systems commonly used in industrial production environments.<\/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\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-eb9d24d e-flex e-con-boxed e-con e-parent\" data-id=\"eb9d24d\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-153eddc elementor-widget elementor-widget-heading\" data-id=\"153eddc\" data-element_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\">ASTM G143 Test Procedure<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-340b2af elementor-widget elementor-widget-heading\" data-id=\"340b2af\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Specimen Preparation<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e33d0fb elementor-widget elementor-widget-text-editor\" data-id=\"e33d0fb\" data-element_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 data-start=\"3675\" data-end=\"3737\">Proper specimen preparation is essential for reliable results.<\/p><p data-start=\"3739\" data-end=\"3775\">Typical specimen dimensions include:<\/p><div class=\"TyagGW_tableContainer\"><div class=\"group TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\"><table class=\"w-fit min-w-(--thread-content-width)\" data-start=\"3777\" data-end=\"3902\"><thead data-start=\"3777\" data-end=\"3806\"><tr data-start=\"3777\" data-end=\"3806\"><th class=\"last:pe-10\" data-start=\"3777\" data-end=\"3789\" data-col-size=\"sm\">Parameter<\/th><th class=\"last:pe-10\" data-start=\"3789\" data-end=\"3806\" data-col-size=\"sm\">Typical Value<\/th><\/tr><\/thead><tbody data-start=\"3838\" data-end=\"3902\"><tr data-start=\"3838\" data-end=\"3855\"><td style=\"text-align: center;\" data-start=\"3838\" data-end=\"3846\" data-col-size=\"sm\">Width<\/td><td style=\"text-align: center;\" data-start=\"3846\" data-end=\"3855\" data-col-size=\"sm\">25 mm<\/td><\/tr><tr data-start=\"3856\" data-end=\"3875\"><td style=\"text-align: center;\" data-start=\"3856\" data-end=\"3865\" data-col-size=\"sm\">Length<\/td><td style=\"text-align: center;\" data-start=\"3865\" data-end=\"3875\" data-col-size=\"sm\">500 mm<\/td><\/tr><tr data-start=\"3876\" data-end=\"3902\"><td style=\"text-align: center;\" data-start=\"3876\" data-end=\"3897\" data-col-size=\"sm\">Minimum Replicates<\/td><td style=\"text-align: center;\" data-start=\"3897\" data-end=\"3902\" data-col-size=\"sm\">3<\/td><\/tr><\/tbody><\/table><\/div><\/div><p data-start=\"3904\" data-end=\"3929\">Important considerations:<\/p><ul data-start=\"3931\" data-end=\"4160\"><li data-section-id=\"1c5a4z2\" data-start=\"3931\" data-end=\"3971\">Use virgin material whenever possible.<\/li><li data-section-id=\"exqdfq\" data-start=\"3972\" data-end=\"4003\">Avoid touching test surfaces.<\/li><li data-section-id=\"1oxoehj\" data-start=\"4004\" data-end=\"4038\">Prevent edge burrs on specimens.<\/li><li data-section-id=\"u5y54f\" data-start=\"4039\" data-end=\"4080\">Maintain consistent sample orientation.<\/li><li data-section-id=\"ph4enw\" data-start=\"4081\" data-end=\"4160\">Test materials in their as-manufactured condition unless otherwise specified.<\/li><\/ul>\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-e204845 elementor-widget elementor-widget-heading\" data-id=\"e204845\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Specimen Mounting<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-87800b5 elementor-widget elementor-widget-text-editor\" data-id=\"87800b5\" data-element_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 data-start=\"4190\" data-end=\"4217\">The specimen is mounted by:<\/p><ol data-start=\"4219\" data-end=\"4422\"><li data-section-id=\"ewfbck\" data-start=\"4219\" data-end=\"4264\">Attaching one end to the force transducer.<\/li><li data-section-id=\"z89xu0\" data-start=\"4265\" data-end=\"4310\">Draping the specimen over the test roller.<\/li><li data-section-id=\"eijcwt\" data-start=\"4311\" data-end=\"4355\">Applying the specified tensioning weight.<\/li><li data-section-id=\"1a3d3a3\" data-start=\"4356\" data-end=\"4385\">Ensuring proper alignment.<\/li><li data-section-id=\"59uekt\" data-start=\"4386\" data-end=\"4422\">Avoiding sharp bends or wrinkles.<\/li><\/ol><p data-start=\"4424\" data-end=\"4498\">Correct mounting minimizes testing variability and improves repeatability.<\/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-7915411 elementor-widget elementor-widget-heading\" data-id=\"7915411\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Setting Sliding Parameters<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3f32668 elementor-widget elementor-widget-text-editor\" data-id=\"3f32668\" data-element_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<h4 data-start=\"4537\" data-end=\"4558\">Sliding Velocity<\/h4><p data-start=\"4560\" data-end=\"4639\">ASTM G143 recommends selecting velocities that simulate the actual application.<\/p><p data-start=\"4641\" data-end=\"4679\">Typical testing velocities range from:<\/p><ul data-start=\"4681\" data-end=\"4785\"><li data-section-id=\"1245gj7\" data-start=\"4681\" data-end=\"4730\">5 mm\/min to 100 mm\/min for low-slip simulations<\/li><li data-section-id=\"17qfci2\" data-start=\"4731\" data-end=\"4785\">Higher speeds when required by specific applications<\/li><\/ul><p data-start=\"4787\" data-end=\"4865\">Velocity selection should reflect real operating conditions whenever possible.<\/p><h4 data-start=\"4867\" data-end=\"4888\">Sliding Distance<\/h4><p data-start=\"4890\" data-end=\"4919\">For static COF determination:<\/p><ul data-start=\"4921\" data-end=\"4968\"><li data-section-id=\"7skj74\" data-start=\"4921\" data-end=\"4968\">Sliding may stop shortly after motion begins.<\/li><\/ul><p data-start=\"4970\" data-end=\"5011\">For static and kinetic COF determination:<\/p><ul data-start=\"5013\" data-end=\"5056\"><li data-section-id=\"1c1xel6\" data-start=\"5013\" data-end=\"5056\">Longer sliding distances are recommended.<\/li><\/ul><p data-start=\"5058\" data-end=\"5101\">ASTM interlaboratory studies commonly used:<\/p><ul data-start=\"5103\" data-end=\"5128\"><li data-section-id=\"187g27h\" data-start=\"5103\" data-end=\"5128\">150 mm sliding distance<\/li><\/ul><h4 data-start=\"5130\" data-end=\"5146\">Web Tension<\/h4><p data-start=\"5148\" data-end=\"5203\">Web tension should represent actual process conditions.<\/p><p data-start=\"5205\" data-end=\"5233\">Typical testing may involve:<\/p><ul data-start=\"5235\" data-end=\"5343\"><li data-section-id=\"xfes7t\" data-start=\"5235\" data-end=\"5260\">Multiple tension levels<\/li><li data-section-id=\"djbt3f\" data-start=\"5261\" data-end=\"5307\">Maximum tension up to 150 N on a 25 mm strip<\/li><li data-section-id=\"3opu6w\" data-start=\"5308\" data-end=\"5343\">Repeatability studies around 45 N<\/li><\/ul>\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-49de134 elementor-widget elementor-widget-heading\" data-id=\"49de134\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Setting Sliding Parameters<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-eccdb39 elementor-widget elementor-widget-text-editor\" data-id=\"eccdb39\" data-element_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 data-start=\"5369\" data-end=\"5428\">The wrap angle significantly affects friction calculations.<\/p><p data-start=\"5430\" data-end=\"5452\">Common values include:<\/p><div class=\"TyagGW_tableContainer\"><div class=\"group TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\"><table class=\"w-fit min-w-(--thread-content-width)\" data-start=\"5454\" data-end=\"5612\"><thead data-start=\"5454\" data-end=\"5482\"><tr data-start=\"5454\" data-end=\"5482\"><th class=\"last:pe-10\" data-start=\"5454\" data-end=\"5467\" data-col-size=\"sm\">Wrap Angle<\/th><th class=\"last:pe-10\" data-start=\"5467\" data-end=\"5482\" data-col-size=\"sm\">Application<\/th><\/tr><\/thead><tbody data-start=\"5512\" data-end=\"5612\"><tr data-start=\"5512\" data-end=\"5546\"><td data-start=\"5512\" data-end=\"5518\" data-col-size=\"sm\">90\u00b0<\/td><td data-start=\"5518\" data-end=\"5546\" data-col-size=\"sm\">Recommended by ASTM G143<\/td><\/tr><tr data-start=\"5547\" data-end=\"5573\"><td data-start=\"5547\" data-end=\"5554\" data-col-size=\"sm\">180\u00b0<\/td><td data-start=\"5554\" data-end=\"5573\" data-col-size=\"sm\">Maximum allowed<\/td><\/tr><tr data-start=\"5574\" data-end=\"5612\"><td data-start=\"5574\" data-end=\"5590\" data-col-size=\"sm\">Custom Angles<\/td><td data-start=\"5590\" data-end=\"5612\" data-col-size=\"sm\">Process simulation<\/td><\/tr><\/tbody><\/table><\/div><\/div><p data-start=\"5614\" data-end=\"5697\">A 90\u00b0 wrap angle is widely used because it balances practicality and repeatability.<\/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\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-13318d3 e-flex e-con-boxed e-con e-parent\" data-id=\"13318d3\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-2583bec elementor-widget elementor-widget-heading\" data-id=\"2583bec\" data-element_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\">ASTM G143 vs. ASTM D1894<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8c0cc36 elementor-widget elementor-widget-text-editor\" data-id=\"8c0cc36\" data-element_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 data-start=\"7124\" data-end=\"7169\">Many users compare ASTM G143 with <a href=\"https:\/\/www.coefficientfriction.com\/vi\/astm-d1894\/\" target=\"_blank\" rel=\"noopener\">ASTM D1894<\/a>.<\/p><div class=\"TyagGW_tableContainer\"><div class=\"group TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\"><table class=\"w-fit min-w-(--thread-content-width)\" data-start=\"7171\" data-end=\"7517\"><thead data-start=\"7171\" data-end=\"7207\"><tr data-start=\"7171\" data-end=\"7207\"><th class=\"last:pe-10\" data-start=\"7171\" data-end=\"7181\" data-col-size=\"sm\">Feature<\/th><th class=\"last:pe-10\" data-start=\"7181\" data-end=\"7193\" data-col-size=\"sm\">ASTM G143<\/th><th class=\"last:pe-10\" data-start=\"7193\" data-end=\"7207\" data-col-size=\"sm\">ASTM D1894<\/th><\/tr><\/thead><tbody data-start=\"7246\" data-end=\"7517\"><tr data-start=\"7246\" data-end=\"7294\"><td style=\"text-align: center;\" data-start=\"7246\" data-end=\"7265\" data-col-size=\"sm\">Contact Geometry<\/td><td style=\"text-align: center;\" data-start=\"7265\" data-end=\"7278\" data-col-size=\"sm\">Roller-Web<\/td><td style=\"text-align: center;\" data-start=\"7278\" data-end=\"7294\" data-col-size=\"sm\">Flat Surface<\/td><\/tr><tr data-start=\"7295\" data-end=\"7370\"><td style=\"text-align: center;\" data-start=\"7295\" data-end=\"7317\" data-col-size=\"sm\">Primary Application<\/td><td style=\"text-align: center;\" data-start=\"7317\" data-end=\"7341\" data-col-size=\"sm\">Web Transport Systems<\/td><td style=\"text-align: center;\" data-start=\"7341\" data-end=\"7370\" data-col-size=\"sm\">General Material Friction<\/td><\/tr><tr data-start=\"7371\" data-end=\"7418\"><td style=\"text-align: center;\" data-start=\"7371\" data-end=\"7388\" data-col-size=\"sm\">Friction Model<\/td><td style=\"text-align: center;\" data-start=\"7388\" data-end=\"7404\" data-col-size=\"sm\">Capstan-Based<\/td><td style=\"text-align: center;\" data-start=\"7404\" data-end=\"7418\" data-col-size=\"sm\">Sled-Based<\/td><\/tr><tr data-start=\"7419\" data-end=\"7459\"><td style=\"text-align: center;\" data-start=\"7419\" data-end=\"7440\" data-col-size=\"sm\">Process Simulation<\/td><td style=\"text-align: center;\" data-start=\"7440\" data-end=\"7447\" data-col-size=\"sm\">High<\/td><td style=\"text-align: center;\" data-start=\"7447\" data-end=\"7459\" data-col-size=\"sm\">Moderate<\/td><\/tr><tr data-start=\"7460\" data-end=\"7517\"><td style=\"text-align: center;\" data-start=\"7460\" data-end=\"7488\" data-col-size=\"sm\">Packaging Film Evaluation<\/td><td style=\"text-align: center;\" data-start=\"7488\" data-end=\"7500\" data-col-size=\"sm\">Excellent<\/td><td style=\"text-align: center;\" data-start=\"7500\" data-end=\"7517\" data-col-size=\"sm\">Commonly Used<\/td><\/tr><\/tbody><\/table><\/div><\/div><p data-start=\"7519\" data-end=\"7680\">ASTM D1894 remains the most widely used packaging-film COF method, while ASTM G143 provides a more realistic simulation of roller-driven production environments.<\/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\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-2611852 e-flex e-con-boxed e-con e-parent\" data-id=\"2611852\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-7e3a05c e-con-full e-flex e-con e-child\" data-id=\"7e3a05c\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-b0a9a8c elementor-widget elementor-widget-heading\" data-id=\"b0a9a8c\" data-element_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\">Equipment for ASTM G143 Testing<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c8ccf38 elementor-widget elementor-widget-text-editor\" data-id=\"c8ccf38\" data-element_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 data-start=\"7723\" data-end=\"7761\">Performing ASTM G143 testing requires:<\/p><ul data-start=\"7763\" data-end=\"7965\"><li data-section-id=\"1ypbcdl\" data-start=\"7763\" data-end=\"7792\">Precision force measurement<\/li><li data-section-id=\"uaac5\" data-start=\"7793\" data-end=\"7818\">Controlled displacement<\/li><li data-section-id=\"1qgmycu\" data-start=\"7819\" data-end=\"7842\">Adjustable test speed<\/li><li data-section-id=\"p6pqox\" data-start=\"7843\" data-end=\"7872\">Data acquisition capability<\/li><li data-section-id=\"1535ikj\" data-start=\"7873\" data-end=\"7902\">Specialized roller fixtures<\/li><li data-section-id=\"rojj7b\" data-start=\"7903\" data-end=\"7940\">Adjustable wrap-angle configuration<\/li><li data-section-id=\"1ypn48f\" data-start=\"7941\" data-end=\"7965\">Tension loading system<\/li><\/ul><p data-start=\"7967\" data-end=\"8108\">Many laboratories use a universal tensile testing platform equipped with custom friction fixtures to perform roller\/web friction measurement.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-25c167f e-con-full e-flex e-con e-child\" data-id=\"25c167f\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-35feb3f elementor-widget elementor-widget-heading\" data-id=\"35feb3f\" data-element_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\">Cell Instruments Solution<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d0c8677 elementor-widget elementor-widget-text-editor\" data-id=\"d0c8677\" data-element_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 data-start=\"8141\" data-end=\"8284\">The <strong data-start=\"8145\" data-end=\"8170\">TST-01 Tensile Tester<\/strong> can serve as the core platform for ASTM G143 testing when combined with a customized roller\/web friction fixture.<\/p><p data-start=\"8286\" data-end=\"8309\">Key advantages include:<\/p><ul data-start=\"8311\" data-end=\"8628\"><li data-section-id=\"k3au6w\" data-start=\"8311\" data-end=\"8361\">PLC-controlled operation with 7-inch touchscreen<\/li><li data-section-id=\"1o8juqv\" data-start=\"8362\" data-end=\"8402\">High-precision ball screw drive system<\/li><li data-section-id=\"11r2jjw\" data-start=\"8403\" data-end=\"8439\">Adjustable speed from 1\u2013500 mm\/min<\/li><li data-section-id=\"12uftm5\" data-start=\"8440\" data-end=\"8469\">Force capacities up to 1 kN<\/li><li data-section-id=\"9x1ctf\" data-start=\"8470\" data-end=\"8505\">Accurate displacement measurement<\/li><li data-section-id=\"heoxsq\" data-start=\"8506\" data-end=\"8537\">Real-time force curve display<\/li><li data-section-id=\"ofk9hg\" data-start=\"8538\" data-end=\"8566\">Custom fixture integration<\/li><li data-section-id=\"cs3dmn\" data-start=\"8567\" data-end=\"8628\">Flexible configuration for specialized testing requirements<\/li><\/ul><p data-start=\"8630\" data-end=\"8807\">For laboratories evaluating multiple materials and friction conditions, customized fixtures and multi-station solutions can further improve testing efficiency and repeatability.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-16cdbb1 e-flex e-con-boxed e-con e-parent\" data-id=\"16cdbb1\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-911e548 elementor-widget elementor-widget-text-editor\" data-id=\"911e548\" data-element_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 data-start=\"9941\" data-end=\"10593\">Understanding roller\/web friction characteristics is essential for ensuring stable web handling, efficient manufacturing, and consistent product quality. <a href=\"https:\/\/store.astm.org\/g0143-03r18.html\" target=\"_blank\" rel=\"noopener nofollow\">ASTM G143<\/a> provides valuable data for evaluating materials, roller surfaces, coatings, and processing conditions. Cell Instruments offers tensile testing platforms, customized friction fixtures, and application-specific testing solutions designed to support ASTM G143 and other coefficient of friction testing requirements. Whether you are developing new materials or improving production performance, selecting the appropriate testing system can help generate reliable and actionable friction data.<\/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\t\t<\/div>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"<p>ASTM G143 Standard Test Method for Measurement of Web\/Roller Friction Characteristics ASTM G143 is a standardized test method used to evaluate the friction behavior between a flexible web material and a cylindrical roller surface. The method measures both the static and kinetic coefficient of friction (COF) during sliding contact and helps manufacturers understand how web [&hellip;]<\/p>","protected":false},"author":2,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"elementor_header_footer","meta":{"footnotes":""},"class_list":["post-803","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.coefficientfriction.com\/vi\/wp-json\/wp\/v2\/pages\/803","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.coefficientfriction.com\/vi\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.coefficientfriction.com\/vi\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.coefficientfriction.com\/vi\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.coefficientfriction.com\/vi\/wp-json\/wp\/v2\/comments?post=803"}],"version-history":[{"count":4,"href":"https:\/\/www.coefficientfriction.com\/vi\/wp-json\/wp\/v2\/pages\/803\/revisions"}],"predecessor-version":[{"id":808,"href":"https:\/\/www.coefficientfriction.com\/vi\/wp-json\/wp\/v2\/pages\/803\/revisions\/808"}],"wp:attachment":[{"href":"https:\/\/www.coefficientfriction.com\/vi\/wp-json\/wp\/v2\/media?parent=803"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}