{"id":3343,"date":"2026-06-30T09:16:36","date_gmt":"2026-06-30T09:16:36","guid":{"rendered":"https:\/\/www.materialstests.com\/?post_type=application&#038;p=3343"},"modified":"2026-06-30T09:16:37","modified_gmt":"2026-06-30T09:16:37","slug":"iso-13937-1","status":"publish","type":"application","link":"https:\/\/www.materialstests.com\/lv\/application\/iso-13937-1.html","title":{"rendered":"ISO 13937-1"},"content":{"rendered":"<h2 class=\"wp-block-heading\">Why ISO 13937-1 Matters in Textile Testing<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>ISO 13937-1<\/strong> is one of the most widely recognized standards for evaluating the tear resistance of textile fabrics. In textile manufacturing, product development, and quality assurance, understanding how a fabric behaves after it has been cut, punctured, or damaged is critical. While tensile strength measures a fabric&#8217;s resistance to breaking under direct pulling forces, tear strength evaluates its ability to resist the propagation of an existing cut or slit.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Port\u0101ls <strong>ISO 13937-1 fabric tear strength standard<\/strong> utilizes the ballistic pendulum method, commonly known as the <strong>Elmendorf tear test of fabric<\/strong>, to determine the force required to continue a tear through a defined distance. The method provides valuable information for manufacturers of apparel, industrial textiles, protective clothing, medical fabrics, packaging materials, and technical textiles.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">By measuring tear resistance, manufacturers can improve product durability, reduce material failures, and ensure compliance with customer specifications and industry requirements.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Understanding the Tear Test of Fabric<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A fabric may experience localized damage during manufacturing, transportation, or end use. Once a cut or puncture occurs, the ability of the material to resist further tearing becomes critical.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Port\u0101ls <strong>tear test of fabric<\/strong> evaluates:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Resistance to tear propagation<\/li>\n\n\n\n<li>Structural integrity after damage<\/li>\n\n\n\n<li>Durability during service<\/li>\n\n\n\n<li>Product safety and performance<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Principle of ISO 13937-1 Elmendorf Tear Testing<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Port\u0101ls <strong>ISO 13937-1<\/strong> method measures the work required to propagate a pre-cut tear through a specified distance.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The test utilizes a pendulum mechanism with two clamps:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>One clamp remains fixed.<\/li>\n\n\n\n<li>The second clamp is attached to a pendulum.<\/li>\n\n\n\n<li>A specimen is secured between the clamps.<\/li>\n\n\n\n<li>A predefined slit is introduced.<\/li>\n\n\n\n<li>The pendulum is released.<\/li>\n\n\n\n<li>The pendulum&#8217;s kinetic energy tears the specimen.<\/li>\n\n\n\n<li>The energy loss during tearing is converted into tear force.<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">Because the test measures energy rather than direct force, it effectively captures the dynamic tearing behavior of textile materials.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">ISO 13937-1 Test Specimen Preparation<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Proper specimen preparation is essential for obtaining reliable results.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Specimen Requirements<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Saska\u0146\u0101 ar <strong>ISO 13937-1<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The specimen is mounted between two jaws.<\/li>\n\n\n\n<li>A slit of <strong>20 mm \u00b1 0.5 mm<\/strong> is cut.<\/li>\n\n\n\n<li>A remaining tear length of <strong>43 mm \u00b1 0.5 mm<\/strong> is maintained.<\/li>\n\n\n\n<li>Specimens are tested in both warp and weft directions when applicable.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Number of Tests<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The standard requires:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>At least five valid specimens per fabric direction.<\/li>\n\n\n\n<li>Additional specimens if excessive invalid results occur.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">ISO 13937-1 Test Procedure<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Port\u0101ls <strong>tear test of fabric<\/strong> follows a straightforward but highly controlled procedure.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Step 1: Pendulum Selection<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Select a pendulum capacity that produces readings between:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>15% and 85% of the instrument scale range<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This ensures optimal measurement accuracy.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Step 2: Instrument Verification<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Confirm zero calibration.<\/li>\n\n\n\n<li>Raise the pendulum to its starting position.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Step 3: Mount the Specimen<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Position the specimen centrally.<\/li>\n\n\n\n<li>Align the long side parallel to the jaw edge.<\/li>\n\n\n\n<li>Secure the specimen firmly.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Step 4: Introduce the Slit<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Using the integrated knife:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Cut a 20 mm slit.<\/li>\n\n\n\n<li>Verify the remaining tear length.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Step 5: Release the Pendulum<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Release the pendulum.<\/li>\n\n\n\n<li>Allow complete tearing of the specimen.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Step 6: Record Results<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Read tear force directly from the display.<\/li>\n\n\n\n<li>Apply correction factors if required by the instrument design.<\/li>\n\n\n\n<li>Record results in Newtons.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Step 7: Validate the Test<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Observe:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Whether the tear follows the intended direction.<\/li>\n\n\n\n<li>Whether yarn slippage occurs.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Tests exhibiting thread slippage rather than tearing must be discarded.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If three or more specimens are invalid, the standard considers the method unsuitable for that material.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Fabric Tear Strength Standard Compared with Other Tear Test Methods<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Port\u0101ls <strong>fabric tear strength standard<\/strong> landscape includes several test methods.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-center\" data-align=\"center\">Standarta<\/th><th class=\"has-text-align-center\" data-align=\"center\">Metode<\/th><th class=\"has-text-align-center\" data-align=\"center\">Primary Application<\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-center\" data-align=\"center\">ISO 13937-1<\/td><td class=\"has-text-align-center\" data-align=\"center\">Elmendorf Pendulum<\/td><td class=\"has-text-align-center\" data-align=\"center\">Woven fabrics<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">ISO 13937-2<\/td><td class=\"has-text-align-center\" data-align=\"center\">Trouser Tear Method<\/td><td class=\"has-text-align-center\" data-align=\"center\">Various textiles<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">ISO 13937-3<\/td><td class=\"has-text-align-center\" data-align=\"center\">Wing Tear Method<\/td><td class=\"has-text-align-center\" data-align=\"center\">Textile fabrics<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">ASTM D1424<\/td><td class=\"has-text-align-center\" data-align=\"center\">Elmendorf Tear Method<\/td><td class=\"has-text-align-center\" data-align=\"center\">Textiles<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">ASTM D2261<\/td><td class=\"has-text-align-center\" data-align=\"center\">Tongue Tear Method<\/td><td class=\"has-text-align-center\" data-align=\"center\">Textile materials<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Among these methods, <strong>ISO 13937-1<\/strong> remains one of the most efficient and widely adopted procedures for routine textile quality control.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Elmendorf Tear Tester Components<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">An <strong><a href=\"https:\/\/www.materialstests.com\/lv\/products\/sld-01-elmendorf-tear-tester.html\/\" target=\"_blank\" rel=\"noreferrer noopener\">Elmendorf asaru testeris<\/a><\/strong> designed for ISO 13937-1 testing typically includes:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Ballistic pendulum assembly<\/li>\n\n\n\n<li>Fixed and movable specimen clamps<\/li>\n\n\n\n<li>Precision cutting knife<\/li>\n\n\n\n<li>Tear force measurement system<\/li>\n\n\n\n<li>Calibration mechanism<\/li>\n\n\n\n<li>Digital display or touchscreen interface<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">The instrument must provide sufficient accuracy to ensure results remain within the standard&#8217;s specified measurement range.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Choosing an Elmendorf Tear Tester for ISO 13937-1 Compliance<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Laboratories performing routine <strong>tear test of fabric<\/strong> evaluations require an instrument that delivers repeatability, ease of use, and traceable results.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Cell Instruments <a href=\"https:\/\/www.materialstests.com\/lv\/products\/sld-01-elmendorf-tear-tester.html\/\" target=\"_blank\" rel=\"noreferrer noopener\">SLD-01 Elmendorf Tear Tester<\/a><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Port\u0101ls <strong>SLD-01 Elmendorf Tear Tester<\/strong> is designed to support testing according to <strong>ISO 13937-1<\/strong> and related tear resistance standards.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Key features include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>PLC control with HMI touchscreen<\/strong> intuit\u012bvai darb\u012bbai<\/li>\n\n\n\n<li><strong>Pneumatic specimen clamping<\/strong> for consistent gripping force<\/li>\n\n\n\n<li><strong>Automatic pendulum release<\/strong> to reduce operator influence<\/li>\n\n\n\n<li><strong>Integrated calibration weights<\/strong> for range verification<\/li>\n\n\n\n<li><strong>Automatic statistical analysis<\/strong> of test results<\/li>\n\n\n\n<li><strong>Papildu programmat\u016bras pakete<\/strong> for advanced reporting<\/li>\n\n\n\n<li><strong>Optional micro-printer and RS-232 communication<\/strong><\/li>\n\n\n\n<li>Multiple pendulum capacities:\n<ul class=\"wp-block-list\">\n<li>200 gf<\/li>\n\n\n\n<li>400 gf<\/li>\n\n\n\n<li>800 gf<\/li>\n\n\n\n<li>1600 gf<\/li>\n\n\n\n<li>3200 gf<\/li>\n\n\n\n<li>6400 gf<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Tehnisk\u0101s specifik\u0101cijas<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-center\" data-align=\"center\">Parametrs<\/th><th class=\"has-text-align-center\" data-align=\"center\">Specifik\u0101cija<\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-center\" data-align=\"center\">Pendulum Capacity<\/td><td class=\"has-text-align-center\" data-align=\"center\">200\u20136400 gf<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Tearing Arm Length<\/td><td class=\"has-text-align-center\" data-align=\"center\">104 \u00b1 1 mm<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Initial Tearing Angle<\/td><td class=\"has-text-align-center\" data-align=\"center\">27.5\u00b0 \u00b1 0.5\u00b0<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">G\u0101zes pieg\u0101de<\/td><td class=\"has-text-align-center\" data-align=\"center\">0,6 MPa<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Baro\u0161anas avots<\/td><td class=\"has-text-align-center\" data-align=\"center\">AC 110\u2013220 V, 50\/60 Hz<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">These features help laboratories maintain compliance with the requirements of the <strong>ISO 13937-1 fabric tear strength standard<\/strong> while improving testing efficiency and data reliability.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Port\u0101ls <strong><a href=\"https:\/\/www.iso.org\/standard\/23369.html\" target=\"_blank\" rel=\"noopener\">ISO 13937-1<\/a><\/strong> standard provides a reliable and internationally recognized method for determining the tear resistance of textile fabrics using the <strong>Elmendorf asaru testeris<\/strong>. By measuring the force required to propagate a pre-existing tear, the method offers valuable insights into fabric durability, structural integrity, and product performance.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Whether used for apparel development, technical textile qualification, medical fabric verification, or routine quality control, the <strong>tear test of fabric<\/strong> remains an essential tool for ensuring consistent material performance and compliance with modern industry requirements.<\/p>","protected":false},"excerpt":{"rendered":"<p>Why ISO 13937-1 Matters in Textile Testing ISO 13937-1 is one of the most widely recognized standards for evaluating the tear resistance of textile fabrics. In textile manufacturing, product development, and quality assurance, understanding how a fabric behaves after it has been cut, punctured, or damaged is critical. While tensile strength measures a fabric&#8217;s resistance [&hellip;]<\/p>","protected":false},"featured_media":3345,"parent":0,"template":"","meta":{"_acf_changed":false},"standard":[1011],"class_list":["post-3343","application","type-application","status-publish","has-post-thumbnail","hentry","standard-iso"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.materialstests.com\/lv\/wp-json\/wp\/v2\/application\/3343","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.materialstests.com\/lv\/wp-json\/wp\/v2\/application"}],"about":[{"href":"https:\/\/www.materialstests.com\/lv\/wp-json\/wp\/v2\/types\/application"}],"version-history":[{"count":2,"href":"https:\/\/www.materialstests.com\/lv\/wp-json\/wp\/v2\/application\/3343\/revisions"}],"predecessor-version":[{"id":3346,"href":"https:\/\/www.materialstests.com\/lv\/wp-json\/wp\/v2\/application\/3343\/revisions\/3346"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.materialstests.com\/lv\/wp-json\/wp\/v2\/media\/3345"}],"wp:attachment":[{"href":"https:\/\/www.materialstests.com\/lv\/wp-json\/wp\/v2\/media?parent=3343"}],"wp:term":[{"taxonomy":"standard","embeddable":true,"href":"https:\/\/www.materialstests.com\/lv\/wp-json\/wp\/v2\/standard?post=3343"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}