{"id":502,"date":"2025-06-17T08:21:41","date_gmt":"2025-06-17T08:21:41","guid":{"rendered":"https:\/\/www.coefficientfriction.com\/?page_id=502"},"modified":"2025-06-17T08:41:48","modified_gmt":"2025-06-17T08:41:48","slug":"iso-15359","status":"publish","type":"page","link":"https:\/\/www.coefficientfriction.com\/he\/iso-15359","title":{"rendered":"ISO 15359"},"content":{"rendered":"<div data-elementor-type=\"wp-page\" data-elementor-id=\"502\" class=\"elementor elementor-502\" data-elementor-post-type=\"page\">\n\t\t\t\t<div class=\"elementor-element elementor-element-e87c6b2 e-flex e-con-boxed e-con e-parent\" data-id=\"e87c6b2\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-d087c52 e-con-full e-flex e-con e-child\" data-id=\"d087c52\" data-element_type=\"container\" data-settings=\"{&quot;animation&quot;:&quot;none&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-d9f31fd elementor-invisible elementor-widget elementor-widget-image\" data-id=\"d9f31fd\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;zoomIn&quot;}\" 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=\"600\" height=\"200\" src=\"https:\/\/www.coefficientfriction.com\/wp-content\/uploads\/2025\/06\/ISO-15359.webp\" class=\"attachment-large size-large wp-image-505\" alt=\"ISO 15359\" srcset=\"https:\/\/www.coefficientfriction.com\/wp-content\/uploads\/2025\/06\/ISO-15359.webp 600w, https:\/\/www.coefficientfriction.com\/wp-content\/uploads\/2025\/06\/ISO-15359-300x100.webp 300w, https:\/\/www.coefficientfriction.com\/wp-content\/uploads\/2025\/06\/ISO-15359-18x6.webp 18w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/>\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-0e3633c elementor-widget__width-initial elementor-invisible elementor-widget elementor-widget-heading\" data-id=\"0e3633c\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;zoomIn&quot;}\" 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\">Paper and board \u2014 Determination of the static and kinetic coefficients of friction \u2014 Horizontal plane method\u200b<\/h2>\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-a73bac6 elementor-invisible elementor-widget elementor-widget-text-editor\" data-id=\"a73bac6\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" 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=\"402\" data-end=\"894\">In industries such as <strong data-start=\"424\" data-end=\"472\">packaging, printing, and paper manufacturing<\/strong>, understanding how materials interact through surface contact is critical. Friction plays a central role in how paper behaves during processing, transport, or end-use. That\u2019s where <strong data-start=\"654\" data-end=\"667\">ISO 15359<\/strong> becomes essential. As the international standard for determining the <strong data-start=\"737\" data-end=\"784\">static and kinetic coefficients of friction<\/strong> for paper and board, ISO 15359 helps ensure product consistency, operational efficiency, and quality control.<\/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-0364755 e-flex e-con-boxed e-con e-parent\" data-id=\"0364755\" 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-f673fbc elementor-invisible elementor-widget elementor-widget-heading\" data-id=\"f673fbc\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" 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\">ISO 15359 Overview: What It Regulates and Why It Matters<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-156f03e elementor-invisible elementor-widget elementor-widget-text-editor\" data-id=\"156f03e\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" 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=\"963\" data-end=\"1092\"><strong data-start=\"963\" data-end=\"976\">ISO 15359<\/strong> specifies a horizontal-plane method for testing the frictional properties of paper and board surfaces. It provides:<\/p><ul><li data-start=\"1096\" data-end=\"1200\">A method to determine the <strong data-start=\"1122\" data-end=\"1161\">static coefficient of friction (\u03bc\u209b)<\/strong> \u2014 the force required to start sliding.<\/li><li data-start=\"1203\" data-end=\"1311\">A method to determine the <strong data-start=\"1229\" data-end=\"1269\">kinetic coefficient of friction (\u03bc\u2096)<\/strong> \u2014 the force required to maintain sliding.<\/li><\/ul><p data-start=\"1313\" data-end=\"1422\">These values are essential for evaluating surface behavior during converting, stacking, or feeding processes.<\/p><p data-start=\"1424\" data-end=\"1578\">For industries relying on paper and board, ISO 15359-compliant testing helps avoid issues such as paper jams, inconsistent stacking, or packaging defects.<\/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-9d958da e-flex e-con-boxed e-con e-parent\" data-id=\"9d958da\" 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-5055911 elementor-invisible elementor-widget elementor-widget-heading\" data-id=\"5055911\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" 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\">Understanding the Coefficient of Friction of Paper<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-127bbd4 e-con-full e-flex e-con e-child\" data-id=\"127bbd4\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-3653dd8 elementor-widget elementor-widget-text-editor\" data-id=\"3653dd8\" 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=\"1641\" data-end=\"1801\">The <strong data-start=\"1645\" data-end=\"1681\">coefficient of friction of paper<\/strong> is a material property that quantifies how easily a paper surface slides over another surface. Two types are important:<\/p><ul data-start=\"1803\" data-end=\"1960\"><li data-start=\"1803\" data-end=\"1877\"><p data-start=\"1805\" data-end=\"1877\"><strong data-start=\"1805\" data-end=\"1845\">Static Coefficient of Friction (\u03bc\u209b):<\/strong> Resistance to initial movement.<\/p><\/li><li data-start=\"1878\" data-end=\"1960\"><p data-start=\"1880\" data-end=\"1960\"><strong data-start=\"1880\" data-end=\"1921\">Kinetic Coefficient of Friction (\u03bc\u2096):<\/strong> Resistance during continuous movement.<\/p><\/li><\/ul><p data-start=\"1962\" data-end=\"2162\">Paper\u2019s surface texture, coating, fiber orientation, and moisture content all influence these values. Consistent measurement is therefore critical for performance benchmarking and supplier comparison.<\/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-aee3b6e elementor-widget__width-initial elementor-widget elementor-widget-image\" data-id=\"aee3b6e\" 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\t<a href=\"https:\/\/www.coefficientfriction.com\/he\/coefficient-of-friction-testing-equipment\/\">\n\t\t\t\t\t\t\t<img decoding=\"async\" width=\"800\" height=\"569\" src=\"https:\/\/www.coefficientfriction.com\/wp-content\/uploads\/2025\/06\/ISO-15359-Coefficient-of-Friction-of-Paper-1024x728.webp\" class=\"attachment-large size-large wp-image-504\" alt=\"ISO 15359 Coefficient of Friction of Paper\" srcset=\"https:\/\/www.coefficientfriction.com\/wp-content\/uploads\/2025\/06\/ISO-15359-Coefficient-of-Friction-of-Paper-1024x728.webp 1024w, https:\/\/www.coefficientfriction.com\/wp-content\/uploads\/2025\/06\/ISO-15359-Coefficient-of-Friction-of-Paper-300x213.webp 300w, https:\/\/www.coefficientfriction.com\/wp-content\/uploads\/2025\/06\/ISO-15359-Coefficient-of-Friction-of-Paper-768x546.webp 768w, https:\/\/www.coefficientfriction.com\/wp-content\/uploads\/2025\/06\/ISO-15359-Coefficient-of-Friction-of-Paper-1536x1092.webp 1536w, https:\/\/www.coefficientfriction.com\/wp-content\/uploads\/2025\/06\/ISO-15359-Coefficient-of-Friction-of-Paper-2048x1456.webp 2048w, https:\/\/www.coefficientfriction.com\/wp-content\/uploads\/2025\/06\/ISO-15359-Coefficient-of-Friction-of-Paper-18x12.webp 18w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\t\t\t\t\t\t\t\t<\/a>\n\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>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-3ba2dc8 e-flex e-con-boxed e-con e-parent\" data-id=\"3ba2dc8\" 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-1203624 elementor-invisible elementor-widget elementor-widget-heading\" data-id=\"1203624\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" 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\">Choosing the Right Coefficient of Friction Measurement Device<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-bddf367 elementor-invisible elementor-widget elementor-widget-text-editor\" data-id=\"bddf367\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" 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=\"2236\" data-end=\"2354\">For accurate results, a <a href=\"https:\/\/www.coefficientfriction.com\/he\/coefficient-of-friction-testing-equipment\/\"><strong data-start=\"2260\" data-end=\"2306\">coefficient of friction measurement device<\/strong><\/a> must meet the ISO 15359 apparatus requirements:<\/p><ul><li data-start=\"2358\" data-end=\"2423\">A <strong data-start=\"2360\" data-end=\"2385\">horizontal test plane<\/strong> made from an incompressible material.<\/li><li data-start=\"2426\" data-end=\"2529\">A <strong data-start=\"2428\" data-end=\"2436\">sled<\/strong> applying 2.2 kPa \u00b1 0.6 kPa of normal pressure with a fixed dimension (around 60 mm \u00d7 60 mm).<\/li><li data-start=\"2532\" data-end=\"2601\">A <strong data-start=\"2534\" data-end=\"2547\">load cell<\/strong> with \u00b12% accuracy to capture peak and average forces.<\/li><li data-start=\"2604\" data-end=\"2674\"><strong data-start=\"2604\" data-end=\"2624\">Drive mechanisms<\/strong> that can control ramp time between 0.5 s and 5 s.<\/li><li data-start=\"2677\" data-end=\"2760\"><strong data-start=\"2677\" data-end=\"2701\">Data recording tools<\/strong> to capture transient events like the static friction peak.<\/li><\/ul><p data-start=\"2762\" data-end=\"3222\">Cell Instruments\u2019 <strong data-start=\"2780\" data-end=\"2821\">COF-01 Coefficient of Friction Tester<\/strong> is ideally suited for ISO 15359-compliant testing. With real-time data display, automated result calculation, and precise mechanical design, the COF-01 ensures reliable testing for both <strong data-start=\"3008\" data-end=\"3055\">static and kinetic coefficients of friction<\/strong>. The device supports multiple standards, including <strong data-start=\"3107\" data-end=\"3134\">ISO 8295 and ASTM D1894<\/strong>, and offers <strong data-start=\"3147\" data-end=\"3181\">flexible configuration options<\/strong> to match various paper grades and forms.<\/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-96b88c3 e-flex e-con-boxed e-con e-parent\" data-id=\"96b88c3\" 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-9ae25c6 elementor-invisible elementor-widget elementor-widget-heading\" data-id=\"9ae25c6\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" 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 Procedure According to ISO 15359<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-98c5281 elementor-invisible elementor-widget elementor-widget-text-editor\" data-id=\"98c5281\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" 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>Here\u2019s a simplified version of how to conduct the test under ISO 15359:<\/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-c1e65fc e-con-full e-flex e-con e-child\" data-id=\"c1e65fc\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-e79b997 elementor-invisible elementor-widget elementor-widget-text-editor\" data-id=\"e79b997\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInLeft&quot;}\" 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 data-start=\"3351\" data-end=\"3477\"><strong data-start=\"3351\" data-end=\"3371\">Prepare Samples:<\/strong> Attach one paper sample to the sled and another to the table. Surfaces to be tested must face each other.<\/li><li data-start=\"3481\" data-end=\"3568\"><strong data-start=\"3481\" data-end=\"3501\">Set Orientation:<\/strong> Align samples in the machine direction (MD\/MD or CD\/CD) as needed.<\/li><li data-start=\"3572\" data-end=\"3658\"><strong data-start=\"3572\" data-end=\"3591\">Lower the Sled:<\/strong> Use a controlled elevator to avoid sliding before the test begins.<\/li><li data-start=\"3662\" data-end=\"3681\"><strong data-start=\"3662\" data-end=\"3681\">Start the Test:<\/strong><ul><li data-start=\"3687\" data-end=\"3770\">Apply an increasing horizontal force until initial sliding occurs \u2014 record <strong data-start=\"3762\" data-end=\"3769\">F\u209b\u2081<\/strong>.<\/li><li data-start=\"3776\" data-end=\"3844\">Continue controlled sliding to determine the <strong data-start=\"3821\" data-end=\"3843\">kinetic force (F\u2096)<\/strong>.<\/li><\/ul><\/li><li data-start=\"3848\" data-end=\"3944\"><strong data-start=\"3848\" data-end=\"3873\">Repeat the Procedure:<\/strong> Conduct multiple test runs (at least six) for statistical reliability.<\/li><li data-start=\"3948\" data-end=\"3970\"><strong data-start=\"3948\" data-end=\"3970\">Calculate Results:<\/strong><\/li><\/ol><ul><li style=\"list-style-type: none;\"><ul><li data-start=\"3976\" data-end=\"3997\">\u03bc\u209b = F\u209b \/ Normal Load<\/li><li data-start=\"4003\" data-end=\"4024\">\u03bc\u2096 = F\u2096 \/ Normal Load<\/li><\/ul><\/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-98415b7 elementor-widget__width-initial elementor-invisible elementor-widget elementor-widget-video\" data-id=\"98415b7\" data-element_type=\"widget\" data-settings=\"{&quot;youtube_url&quot;:&quot;https:\\\/\\\/youtu.be\\\/NUgXENOz8J0&quot;,&quot;autoplay&quot;:&quot;yes&quot;,&quot;play_on_mobile&quot;:&quot;yes&quot;,&quot;mute&quot;:&quot;yes&quot;,&quot;loop&quot;:&quot;yes&quot;,&quot;_animation&quot;:&quot;fadeInRight&quot;,&quot;video_type&quot;:&quot;youtube&quot;,&quot;controls&quot;:&quot;yes&quot;}\" data-widget_type=\"video.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-wrapper elementor-open-inline\">\n\t\t\t<div class=\"elementor-video\"><\/div>\t\t<\/div>\n\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-f4a8125 elementor-invisible elementor-widget elementor-widget-text-editor\" data-id=\"f4a8125\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" 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>Ensure proper <strong data-start=\"4040\" data-end=\"4057\">sled guidance<\/strong> and <strong data-start=\"4062\" data-end=\"4083\">backing materials<\/strong> (such as neoprene) to maintain uniform contact pressure during testing.<\/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-f7106d9 e-flex e-con-boxed e-con e-parent\" data-id=\"f7106d9\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-694940d e-con-full e-flex e-con e-child\" data-id=\"694940d\" data-element_type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-8ea1c6c e-con-full e-flex elementor-invisible e-con e-child\" data-id=\"8ea1c6c\" data-element_type=\"container\" data-settings=\"{&quot;animation&quot;:&quot;fadeInLeft&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-f6ee6d5 elementor-widget elementor-widget-heading\" data-id=\"f6ee6d5\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;none&quot;}\" 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\">Best Practices for ISO 15359 Coefficient of Friction Testing<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-663e3cc elementor-invisible elementor-widget elementor-widget-text-editor\" data-id=\"663e3cc\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" 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<ul><li data-start=\"4230\" data-end=\"4332\"><strong data-start=\"4230\" data-end=\"4257\">Control the environment<\/strong>: Temperature and humidity can significantly affect paper surface friction.<\/li><li data-start=\"4335\" data-end=\"4439\"><strong data-start=\"4335\" data-end=\"4368\">Use uniform backing materials<\/strong>: Inconsistent backing leads to unreliable pressure and test deviation.<\/li><li data-start=\"4442\" data-end=\"4544\"><strong data-start=\"4442\" data-end=\"4461\">Check ramp time<\/strong>: It should fall between 0.5 to 5 seconds \u2014 results outside this range are invalid.<\/li><li data-start=\"4547\" data-end=\"4631\"><strong data-start=\"4547\" data-end=\"4574\">Avoid stick-slip motion<\/strong>: If observed, kinetic friction values become unreliable.<\/li><li data-start=\"4634\" data-end=\"4747\"><strong data-start=\"4634\" data-end=\"4672\">Calibrate your equipment regularly<\/strong>: To ensure compliance with ISO 15359&#8217;s \u00b12% load cell accuracy requirement.<\/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>\n\t\t<div class=\"elementor-element elementor-element-b0586e5 e-con-full e-flex elementor-invisible e-con e-child\" data-id=\"b0586e5\" data-element_type=\"container\" data-settings=\"{&quot;animation&quot;:&quot;fadeInRight&quot;}\">\n\t\t<div class=\"elementor-element elementor-element-f9046cc e-con-full e-flex e-con e-child\" data-id=\"f9046cc\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-c4f0b8e elementor-widget elementor-widget-heading\" data-id=\"c4f0b8e\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;none&quot;}\" 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 Choose our COF-01 for ISO 15359 Testing<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2186d6f elementor-invisible elementor-widget elementor-widget-text-editor\" data-id=\"2186d6f\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" 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=\"4817\" data-end=\"4935\">Cell Instruments\u2019 <strong data-start=\"4835\" data-end=\"4876\">COF-01 <a href=\"https:\/\/www.coefficientfriction.com\/he\/coefficient-of-friction-testing-equipment\/\">Coefficient of Friction Tester<\/a><\/strong> is engineered for precise and consistent friction testing:<\/p><ul data-start=\"4937\" data-end=\"5222\"><li data-start=\"4937\" data-end=\"4987\"><p data-start=\"4939\" data-end=\"4987\"><strong data-start=\"4939\" data-end=\"4962\">PLC + HMI interface<\/strong> for intuitive operation.<\/p><\/li><li data-start=\"4988\" data-end=\"5065\"><p data-start=\"4990\" data-end=\"5065\"><strong data-start=\"4990\" data-end=\"5016\">Precision drive system<\/strong> ensures accurate ramp time and velocity control.<\/p><\/li><li data-start=\"5066\" data-end=\"5154\"><p data-start=\"5068\" data-end=\"5154\"><strong data-start=\"5068\" data-end=\"5088\">Built-in printer<\/strong> and <strong data-start=\"5093\" data-end=\"5114\">optional software<\/strong> simplify data collection and reporting.<\/p><\/li><li data-start=\"5155\" data-end=\"5222\"><p data-start=\"5157\" data-end=\"5222\">Fully supports ISO 15359 test procedures and apparatus standards.<\/p><\/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>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-6d2c64c e-flex e-con-boxed e-con e-parent\" data-id=\"6d2c64c\" 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-c394047 elementor-invisible elementor-widget elementor-widget-heading\" data-id=\"c394047\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" 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\">FAQs<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b484e06 elementor-invisible elementor-widget elementor-widget-n-accordion\" data-id=\"b484e06\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;,&quot;max_items_expended&quot;:&quot;multiple&quot;,&quot;default_state&quot;:&quot;expanded&quot;,&quot;n_accordion_animation_duration&quot;:{&quot;unit&quot;:&quot;ms&quot;,&quot;size&quot;:400,&quot;sizes&quot;:[]}}\" data-widget_type=\"nested-accordion.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"e-n-accordion\" aria-label=\"Accordion. Open links with Enter or Space, close with Escape, and navigate with Arrow Keys\">\n\t\t\t\t\t\t<details id=\"e-n-accordion-item-1890\" class=\"e-n-accordion-item\" open>\n\t\t\t\t<summary class=\"e-n-accordion-item-title\" data-accordion-index=\"1\" tabindex=\"0\" aria-expanded=\"true\" aria-controls=\"e-n-accordion-item-1890\" >\n\t\t\t\t\t<span class='e-n-accordion-item-title-header'><div class=\"e-n-accordion-item-title-text\"> 1. What is the difference between static and kinetic coefficient of friction? <\/div><\/span>\n\t\t\t\t\t\t\t<span class='e-n-accordion-item-title-icon'>\n\t\t\t<span class='e-opened' ><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-minus\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t\t<span class='e-closed'><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-plus\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-1890\" class=\"elementor-element elementor-element-4dda86b e-con-full e-flex e-con e-child\" data-id=\"4dda86b\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-b1ee56f elementor-widget elementor-widget-text-editor\" data-id=\"b1ee56f\" 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>The static coefficient (\u03bc\u209b) measures the resistance to start moving, while the kinetic coefficient (\u03bc\u2096) measures resistance during movement.<\/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<\/details>\n\t\t\t\t\t\t<details id=\"e-n-accordion-item-1891\" class=\"e-n-accordion-item\" >\n\t\t\t\t<summary class=\"e-n-accordion-item-title\" data-accordion-index=\"2\" tabindex=\"-1\" aria-expanded=\"false\" aria-controls=\"e-n-accordion-item-1891\" >\n\t\t\t\t\t<span class='e-n-accordion-item-title-header'><div class=\"e-n-accordion-item-title-text\"> 2. Why is ISO 15359 important for paper testing? <\/div><\/span>\n\t\t\t\t\t\t\t<span class='e-n-accordion-item-title-icon'>\n\t\t\t<span class='e-opened' ><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-minus\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t\t<span class='e-closed'><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-plus\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-1891\" class=\"elementor-element elementor-element-4213cd7 e-con-full e-flex e-con e-child\" data-id=\"4213cd7\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-a5cb0ea elementor-widget elementor-widget-text-editor\" data-id=\"a5cb0ea\" 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>It provides a consistent method to evaluate how paper surfaces interact, which is critical for processing and end-use applications.<\/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<\/details>\n\t\t\t\t\t\t<details id=\"e-n-accordion-item-1892\" class=\"e-n-accordion-item\" >\n\t\t\t\t<summary class=\"e-n-accordion-item-title\" data-accordion-index=\"3\" tabindex=\"-1\" aria-expanded=\"false\" aria-controls=\"e-n-accordion-item-1892\" >\n\t\t\t\t\t<span class='e-n-accordion-item-title-header'><div class=\"e-n-accordion-item-title-text\"> 3. How many tests are required under ISO 15359? <\/div><\/span>\n\t\t\t\t\t\t\t<span class='e-n-accordion-item-title-icon'>\n\t\t\t<span class='e-opened' ><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-minus\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t\t<span class='e-closed'><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-plus\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-1892\" class=\"elementor-element elementor-element-8cbaf70 e-con-full e-flex e-con e-child\" data-id=\"8cbaf70\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-ed707d2 elementor-widget elementor-widget-text-editor\" data-id=\"ed707d2\" 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>At least six valid test results are needed to ensure statistical reliability.<\/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<\/details>\n\t\t\t\t\t\t<details id=\"e-n-accordion-item-1893\" class=\"e-n-accordion-item\" >\n\t\t\t\t<summary class=\"e-n-accordion-item-title\" data-accordion-index=\"4\" tabindex=\"-1\" aria-expanded=\"false\" aria-controls=\"e-n-accordion-item-1893\" >\n\t\t\t\t\t<span class='e-n-accordion-item-title-header'><div class=\"e-n-accordion-item-title-text\"> 4. What kind of paper can be tested using ISO 15359? <\/div><\/span>\n\t\t\t\t\t\t\t<span class='e-n-accordion-item-title-icon'>\n\t\t\t<span class='e-opened' ><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-minus\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t\t<span class='e-closed'><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-plus\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-1893\" class=\"elementor-element elementor-element-01f62b9 e-flex e-con-boxed e-con e-child\" data-id=\"01f62b9\" 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-f8e70d7 elementor-widget elementor-widget-text-editor\" data-id=\"f8e70d7\" 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>All types of paper and board can be tested, regardless of coating or thickness.<\/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\t<\/details>\n\t\t\t\t\t\t<details id=\"e-n-accordion-item-1894\" class=\"e-n-accordion-item\" >\n\t\t\t\t<summary class=\"e-n-accordion-item-title\" data-accordion-index=\"5\" tabindex=\"-1\" aria-expanded=\"false\" aria-controls=\"e-n-accordion-item-1894\" >\n\t\t\t\t\t<span class='e-n-accordion-item-title-header'><div class=\"e-n-accordion-item-title-text\"> 5. Which instrument is recommended for ISO 15359 testing? <\/div><\/span>\n\t\t\t\t\t\t\t<span class='e-n-accordion-item-title-icon'>\n\t\t\t<span class='e-opened' ><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-minus\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t\t<span class='e-closed'><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-plus\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-1894\" class=\"elementor-element elementor-element-0dd2c60 e-flex e-con-boxed e-con e-child\" data-id=\"0dd2c60\" 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-5c7d500 elementor-widget elementor-widget-text-editor\" data-id=\"5c7d500\" 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>The COF-01 from Cell Instruments is fully compliant with ISO 15359 and is designed for precise, automated friction testing of paper and board.<\/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\t<\/details>\n\t\t\t\t\t<\/div>\n\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>Paper and board \u2014 Determination of the static and kinetic coefficients of friction \u2014 Horizontal plane method\u200b In industries such as packaging, printing, and paper manufacturing, understanding how materials interact through surface contact is critical. Friction plays a central role in how paper behaves during processing, transport, or end-use. That\u2019s where ISO 15359 becomes essential. [&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-502","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.coefficientfriction.com\/he\/wp-json\/wp\/v2\/pages\/502","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.coefficientfriction.com\/he\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.coefficientfriction.com\/he\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.coefficientfriction.com\/he\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.coefficientfriction.com\/he\/wp-json\/wp\/v2\/comments?post=502"}],"version-history":[{"count":4,"href":"https:\/\/www.coefficientfriction.com\/he\/wp-json\/wp\/v2\/pages\/502\/revisions"}],"predecessor-version":[{"id":508,"href":"https:\/\/www.coefficientfriction.com\/he\/wp-json\/wp\/v2\/pages\/502\/revisions\/508"}],"wp:attachment":[{"href":"https:\/\/www.coefficientfriction.com\/he\/wp-json\/wp\/v2\/media?parent=502"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}