{"id":311,"date":"2025-02-26T06:47:27","date_gmt":"2025-02-26T06:47:27","guid":{"rendered":"https:\/\/www.hottacktest.com\/?page_id=311"},"modified":"2026-04-13T02:44:00","modified_gmt":"2026-04-13T02:44:00","slug":"astm-f1921-hot-tack-test-method","status":"publish","type":"page","link":"https:\/\/www.hottacktest.com\/bg\/astm-f1921-hot-tack-test-method","title":{"rendered":"\u041c\u0435\u0442\u043e\u0434\u0438 \u0437\u0430 \u0438\u0437\u043f\u0438\u0442\u0432\u0430\u043d\u0435 \u043d\u0430 \u0433\u043e\u0440\u0435\u0449\u043e \u043f\u0440\u0438\u043b\u0435\u043f\u0432\u0430\u043d\u0435"},"content":{"rendered":"<div data-elementor-type=\"wp-page\" data-elementor-id=\"311\" class=\"elementor elementor-311\" data-elementor-post-type=\"page\">\n\t\t\t\t<div class=\"elementor-element elementor-element-c60fdbb e-flex e-con-boxed e-con e-parent\" data-id=\"c60fdbb\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-db6fcba e-con-full e-flex e-con e-child\" data-id=\"db6fcba\" data-element_type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-9d1f798 e-con-full e-flex e-con e-child\" data-id=\"9d1f798\" data-element_type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-8cc5a79 e-con-full e-flex e-con e-child\" data-id=\"8cc5a79\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-b6b67d4 elementor-widget elementor-widget-heading\" data-id=\"b6b67d4\" 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 F1921<br><small>Hot Tack Test Method<\/small><\/h1>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-69f526a elementor-widget__width-initial elementor-widget elementor-widget-text-editor\" data-id=\"69f526a\" 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 ASTM F1921 standard is a crucial test method for evaluating the hot tack strength of films and other packaging materials. This test helps manufacturers determine the strength of seals formed under hot conditions, which is vital in ensuring the quality and durability of sealed packages.<\/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-e94257c elementor-button-align-stretch elementor-widget elementor-widget-form\" data-id=\"e94257c\" data-element_type=\"widget\" data-settings=\"{&quot;button_width&quot;:&quot;20&quot;,&quot;step_next_label&quot;:&quot;Next&quot;,&quot;step_previous_label&quot;:&quot;Previous&quot;,&quot;step_type&quot;:&quot;number_text&quot;,&quot;step_icon_shape&quot;:&quot;circle&quot;}\" data-widget_type=\"form.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<form class=\"elementor-form\" method=\"post\" name=\"New Form\" action=\"\">\n\t\t\t<input type=\"hidden\" name=\"post_id\" value=\"311\"\/>\n\t\t\t<input type=\"hidden\" name=\"form_id\" value=\"e94257c\"\/>\n\t\t\t<input type=\"hidden\" name=\"referer_title\" value=\"Hot Tack Test\" \/>\n\n\t\t\t\n\t\t\t<div class=\"elementor-form-fields-wrapper elementor-labels-\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-field-type-text elementor-field-group elementor-column elementor-field-group-name elementor-col-100 elementor-field-required\">\n\t\t\t\t\t\t\t\t\t\t\t\t<label for=\"form-field-name\" class=\"elementor-field-label elementor-screen-only\">\n\t\t\t\t\t\t\t\t\u0418\u043c\u0435\t\t\t\t\t\t\t<\/label>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<input size=\"1\" type=\"text\" name=\"form_fields[name]\" id=\"form-field-name\" class=\"elementor-field elementor-size-sm  elementor-field-textual\" placeholder=\"\u0418\u043c\u0435\" required=\"required\" aria-required=\"true\">\n\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<div class=\"elementor-field-type-text elementor-field-group elementor-column elementor-field-group-field_e66310b elementor-col-100\">\n\t\t\t\t\t\t\t\t\t\t\t\t<label for=\"form-field-field_e66310b\" class=\"elementor-field-label elementor-screen-only\">\n\t\t\t\t\t\t\t\t\u041a\u043e\u043c\u043f\u0430\u043d\u0438\u044f\t\t\t\t\t\t\t<\/label>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<input size=\"1\" type=\"text\" name=\"form_fields[field_e66310b]\" id=\"form-field-field_e66310b\" class=\"elementor-field elementor-size-sm  elementor-field-textual\" placeholder=\"\u041a\u043e\u043c\u043f\u0430\u043d\u0438\u044f\">\n\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<div class=\"elementor-field-type-email elementor-field-group elementor-column elementor-field-group-email elementor-col-100 elementor-field-required\">\n\t\t\t\t\t\t\t\t\t\t\t\t<label for=\"form-field-email\" class=\"elementor-field-label elementor-screen-only\">\n\t\t\t\t\t\t\t\t\u0418\u043c\u0435\u0439\u043b\t\t\t\t\t\t\t<\/label>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<input size=\"1\" type=\"email\" name=\"form_fields[email]\" id=\"form-field-email\" class=\"elementor-field elementor-size-sm  elementor-field-textual\" placeholder=\"\u0418\u043c\u0435\u0439\u043b\" required=\"required\" aria-required=\"true\">\n\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<div class=\"elementor-field-type-textarea elementor-field-group elementor-column elementor-field-group-message elementor-col-100\">\n\t\t\t\t\t\t\t\t\t\t\t\t<label for=\"form-field-message\" class=\"elementor-field-label elementor-screen-only\">\n\t\t\t\t\t\t\t\t\u0421\u044a\u043e\u0431\u0449\u0435\u043d\u0438\u0435\t\t\t\t\t\t\t<\/label>\n\t\t\t\t\t\t<textarea class=\"elementor-field-textual elementor-field  elementor-size-sm\" name=\"form_fields[message]\" id=\"form-field-message\" rows=\"4\" placeholder=\"\u0421\u044a\u043e\u0431\u0449\u0435\u043d\u0438\u0435\"><\/textarea>\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<div class=\"elementor-field-type-recaptcha_v3 elementor-field-group elementor-column elementor-field-group-field_f2b376d elementor-col-100 recaptcha_v3-bottomright\">\n\t\t\t\t\t<div class=\"elementor-field\" id=\"form-field-field_f2b376d\"><div class=\"elementor-g-recaptcha\" data-sitekey=\"6Lcar6MrAAAAAL9Pz42-0SmIdCeogSKNdnyqx6QR\" data-type=\"v3\" data-action=\"Form\" data-badge=\"bottomright\" data-size=\"invisible\"><\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<div class=\"elementor-field-group elementor-column elementor-field-type-submit elementor-col-20 e-form__buttons\">\n\t\t\t\t\t<button class=\"elementor-button elementor-size-sm\" type=\"submit\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">\u0418\u0437\u043f\u0440\u0430\u0442\u0438<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/button>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<input type=\"hidden\" name=\"trp-form-language\" value=\"bg\"\/><\/form>\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>\n\t\t<div class=\"elementor-element elementor-element-163fe1b e-con-full e-flex e-con e-child\" data-id=\"163fe1b\" data-element_type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\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-70c5562 e-flex e-con-boxed e-con e-parent\" data-id=\"70c5562\" 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-4d92677 elementor-widget elementor-widget-heading\" data-id=\"4d92677\" 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\">I. What is ASTM F1921?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7b6c909 elementor-widget elementor-widget-text-editor\" data-id=\"7b6c909\" 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=\"737\" data-end=\"1268\"><a href=\"https:\/\/www.hottacktest.com\/bg\/astm-f1921-hot-tack-test-method\" target=\"_blank\" rel=\"noopener\">ASTM F1921<\/a> is a standard test method developed by ASTM International that measures the hot tack strength of materials, particularly films used in packaging. Hot tack strength refers to the ability of a seal to resist disruptive forces while the seal is still hot, which is a common challenge in form-fill operations. The test is typically conducted using either a fixed or variable delay testing machine, with the primary objective being to determine how much force is required to peel apart a sealed sample after exposure to heat.<\/p><p data-start=\"1270\" data-end=\"1656\">This test is vital because during packaging processes, especially in the food and pharmaceutical industries, packages are often subjected to forces while still warm. If the seal fails prematurely, the contents could be compromised, leading to product loss or contamination. Thus, understanding and measuring hot tack strength helps manufacturers ensure the integrity of their packaging.<\/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-fefe3ef e-flex e-con-boxed e-con e-parent\" data-id=\"fefe3ef\" 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-aa5617b elementor-widget elementor-widget-heading\" data-id=\"aa5617b\" 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\">II. The Hot Tack Test Method: Step-by-Step<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f7b21f1 elementor-widget elementor-widget-heading\" data-id=\"f7b21f1\" 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\">1. Hot Tack Test Method Overview<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1416ce2 elementor-widget elementor-widget-text-editor\" data-id=\"1416ce2\" 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=\"1736\" data-end=\"2085\">The ASTM F1921 method involves sealing two strips of film together under controlled conditions of pressure, temperature, and time. One or both sealing jaws may be heated, and the force required to peel the sealed films apart is measured. The test provides a &#8220;hot tack curve,&#8221; which shows the material&#8217;s performance at different sealing temperatures.<\/p><p data-start=\"2087\" data-end=\"2284\">There are two main methods for conducting the hot tack test: <strong data-start=\"2148\" data-end=\"2160\">Method A<\/strong> (Fixed Delay) and <strong data-start=\"2179\" data-end=\"2191\">Method B<\/strong> (Variable Delay). The choice of method depends on the machine and the material being tested.<\/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-a8d9ab3 elementor-widget elementor-widget-heading\" data-id=\"a8d9ab3\" 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\">2. Hot Tack Meaning and Importance in Packaging<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-65afa6c elementor-widget elementor-widget-text-editor\" data-id=\"65afa6c\" 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=\"2336\" data-end=\"2651\">The hot tack test is vital for packaging materials as it simulates the conditions that a package seal may face during filling, sealing, and transport. A strong hot tack performance ensures that the packaging material can withstand stresses that may occur during the production process without compromising the seal.<\/p><p data-start=\"2653\" data-end=\"2945\">For instance, in packaging food products, the ability of a film to resist opening while still hot is critical for maintaining freshness and preventing contamination. Similarly, medical packaging requires reliable seals to prevent exposure to environmental factors like moisture, dust, or air.<\/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-7d7440d elementor-widget elementor-widget-heading\" data-id=\"7d7440d\" 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\">3. Key Test Parameters in ASTM F1921<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d836c93 elementor-widget elementor-widget-text-editor\" data-id=\"d836c93\" 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<ul><li data-start=\"2986\" data-end=\"3153\"><strong data-start=\"2988\" data-end=\"3012\">Sealing Temperature:<\/strong> The sealing temperature is adjusted based on the material under test. Typically, sealing temperatures start low and are gradually increased.<\/li><li data-start=\"3154\" data-end=\"3280\"><strong data-start=\"3156\" data-end=\"3171\">Dwell Time:<\/strong> The amount of time the material is subjected to pressure during sealing, which affects the seal&#8217;s integrity.<\/li><li data-start=\"3281\" data-end=\"3393\"><strong data-start=\"3283\" data-end=\"3304\">Sealing Pressure:<\/strong> The pressure applied during sealing, which is typically set between 15 N\/m\u00b2 and 30 N\/m\u00b2.<\/li><li data-start=\"3394\" data-end=\"3496\"><strong data-start=\"3396\" data-end=\"3421\">Specimen Preparation:<\/strong> Specimens are cut to size and conditioned to meet the test\u2019s requirements.<\/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-5250082 elementor-widget elementor-widget-heading\" data-id=\"5250082\" 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\">4. Results Interpretation: Hot Tack Curve<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-15e77cb elementor-widget elementor-widget-text-editor\" data-id=\"15e77cb\" 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=\"3542\" data-end=\"3860\">A hot tack curve is generated by plotting the hot tack strength against time after the seal jaws open. The curve typically starts with a high strength that decreases as the material cools. This graph helps identify the ideal sealing conditions and predict the material&#8217;s performance in real-world packaging operations.<\/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-200c69f e-flex e-con-boxed e-con e-parent\" data-id=\"200c69f\" 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-9604edf elementor-widget elementor-widget-heading\" data-id=\"9604edf\" 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\">III. Hot Tack Test Significance in Packaging Applications<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e670c27 elementor-widget elementor-widget-text-editor\" data-id=\"e670c27\" 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=\"3919\" data-end=\"3966\">The hot tack test is vital for several reasons:<\/p><ul data-start=\"3967\" data-end=\"4408\"><li data-start=\"3967\" data-end=\"4093\"><strong data-start=\"3969\" data-end=\"3991\">Quality Assurance:<\/strong> It ensures that packaging materials meet the necessary performance standards under heat and pressure.<\/li><li data-start=\"4094\" data-end=\"4231\"><strong data-start=\"4096\" data-end=\"4121\">Process Optimization:<\/strong> The results help in optimizing the packaging process by identifying ideal sealing temperatures and pressures.<\/li><li data-start=\"4232\" data-end=\"4405\"><strong data-start=\"4234\" data-end=\"4258\">Material Comparison:<\/strong> It allows manufacturers to compare the hot tack strength of different films or materials, helping in material selection for specific applications.<\/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-d0184fb e-grid e-con-boxed e-con e-parent\" data-id=\"d0184fb\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-1b0ee1d e-con-full e-flex e-con e-child\" data-id=\"1b0ee1d\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-6d4017f elementor-widget elementor-widget-heading\" data-id=\"6d4017f\" 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\">IV. Choosing the Right Equipment for Hot Tack Testing<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1746609 elementor-widget elementor-widget-text-editor\" data-id=\"1746609\" 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=\"4463\" data-end=\"4658\">To conduct ASTM F1921 testing, manufacturers need specialized equipment such as a <a href=\"https:\/\/www.hottacktest.com\/bg\/heat-seal-and-hot-tack-testing-machine-astm-f1921\/\" target=\"_blank\" rel=\"noopener\" data-wplink-edit=\"true\">hot tack tester<\/a>, which should be calibrated to ensure accuracy. The machine must have the following capabilities:<\/p><ul data-start=\"4659\" data-end=\"4843\"><li data-start=\"4659\" data-end=\"4731\">Precision control of jaw temperature, dwell time, and sealing pressure<\/li><li data-start=\"4732\" data-end=\"4793\">The ability to measure the force required to break the seal<\/li><li data-start=\"4794\" data-end=\"4843\">A computer interface to record and analyze data<\/li><\/ul><p data-start=\"4845\" data-end=\"4961\">Additionally, the machine should support both fixed and variable delay methods, allowing for versatility in testing.<\/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-c1951e5 e-con-full e-flex e-con e-child\" data-id=\"c1951e5\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-a5357ed elementor-widget elementor-widget-image\" data-id=\"a5357ed\" 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<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/www.hottacktest.com\/bg\/heat-seal-and-hot-tack-testing-machine-astm-f1921\/\">\n\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"600\" height=\"400\" src=\"https:\/\/www.hottacktest.com\/wp-content\/uploads\/2025\/02\/astm-f1921-hot-tack-tester.webp\" class=\"attachment-large size-large wp-image-337\" alt=\"astm f1921 hot tack tester\" srcset=\"https:\/\/www.hottacktest.com\/wp-content\/uploads\/2025\/02\/astm-f1921-hot-tack-tester.webp 600w, https:\/\/www.hottacktest.com\/wp-content\/uploads\/2025\/02\/astm-f1921-hot-tack-tester-300x200.webp 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">\u0422\u0435\u0441\u0442\u0435\u0440 \u0437\u0430 \u0433\u043e\u0440\u0435\u0449\u043e \u043f\u0440\u0438\u043b\u0435\u043f\u0432\u0430\u043d\u0435<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\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\t\t<\/div>","protected":false},"excerpt":{"rendered":"<p>ASTM F1921Hot Tack Test Method The ASTM F1921 standard is a crucial test method for evaluating the hot tack strength of films and other packaging materials. This test helps manufacturers determine the strength of seals formed under hot conditions, which is vital in ensuring the quality and durability of sealed packages. I. What is ASTM [&hellip;]<\/p>","protected":false},"author":3,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-311","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>ASTM F1921 - Hot Tack Test Method - Hot Tack Test<\/title>\n<meta name=\"description\" content=\"Explore ASTM F1921 and hot tack test method, including how to measure hot tack strength, using the proper equipment and procedures.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.hottacktest.com\/bg\/astm-f1921-hot-tack-test-method\" \/>\n<meta property=\"og:locale\" content=\"bg_BG\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"ASTM F1921 - 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\u0418\u0437\u043f\u0438\u0442\u0432\u0430\u043d\u0435 \u043d\u0430 \u0433\u043e\u0440\u0435\u0449\u043e \u0437\u0430\u043b\u0435\u043f\u0432\u0430\u043d\u0435","isPartOf":{"@id":"https:\/\/www.hottacktest.com\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.hottacktest.com\/astm-f1921-hot-tack-test-method#primaryimage"},"image":{"@id":"https:\/\/www.hottacktest.com\/astm-f1921-hot-tack-test-method#primaryimage"},"thumbnailUrl":"https:\/\/www.hottacktest.com\/wp-content\/uploads\/2025\/02\/astm-f1921-hot-tack-tester.webp","datePublished":"2025-02-26T06:47:27+00:00","dateModified":"2026-04-13T02:44:00+00:00","description":"\u0420\u0430\u0437\u0433\u043b\u0435\u0434\u0430\u0439\u0442\u0435 \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442\u0430 ASTM F1921 \u0438 \u043c\u0435\u0442\u043e\u0434\u0430 \u0437\u0430 \u0438\u0437\u043f\u0438\u0442\u0432\u0430\u043d\u0435 \u043d\u0430 \u0433\u043e\u0440\u0435\u0449\u043e \u043b\u0435\u043f\u0435\u043d\u0435, \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u043d\u043e \u043a\u0430\u043a \u0434\u0430 \u0438\u0437\u043c\u0435\u0440\u0432\u0430\u0442\u0435 \u044f\u043a\u043e\u0441\u0442\u0442\u0430 \u043d\u0430 \u0433\u043e\u0440\u0435\u0449\u043e \u043b\u0435\u043f\u0435\u043d\u0435, \u043a\u0430\u0442\u043e \u0438\u0437\u043f\u043e\u043b\u0437\u0432\u0430\u0442\u0435 \u043f\u043e\u0434\u0445\u043e\u0434\u044f\u0449\u043e\u0442\u043e \u043e\u0431\u043e\u0440\u0443\u0434\u0432\u0430\u043d\u0435 \u0438 \u043f\u0440\u043e\u0446\u0435\u0434\u0443\u0440\u0438.","breadcrumb":{"@id":"https:\/\/www.hottacktest.com\/astm-f1921-hot-tack-test-method#breadcrumb"},"inLanguage":"bg-BG","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.hottacktest.com\/astm-f1921-hot-tack-test-method"]}]},{"@type":"ImageObject","inLanguage":"bg-BG","@id":"https:\/\/www.hottacktest.com\/astm-f1921-hot-tack-test-method#primaryimage","url":"https:\/\/www.hottacktest.com\/wp-content\/uploads\/2025\/02\/astm-f1921-hot-tack-tester.webp","contentUrl":"https:\/\/www.hottacktest.com\/wp-content\/uploads\/2025\/02\/astm-f1921-hot-tack-tester.webp"},{"@type":"BreadcrumbList","@id":"https:\/\/www.hottacktest.com\/astm-f1921-hot-tack-test-method#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.hottacktest.com\/"},{"@type":"ListItem","position":2,"name":"Hot Tack Test Methods"}]},{"@type":"WebSite","@id":"https:\/\/www.hottacktest.com\/#website","url":"https:\/\/www.hottacktest.com\/","name":"\u0421\u043e\u0444\u0442\u0433\u0435\u043b \u0442\u0435\u0441\u0442","description":"\u0420\u0430\u0437\u0442\u0432\u043e\u0440 \u0437\u0430 \u0438\u0437\u043f\u0438\u0442\u0432\u0430\u043d\u0435 \u043d\u0430 \u0433\u043e\u0440\u0435\u0449\u043e \u0441\u0446\u0435\u043f\u043b\u0435\u043d\u0438\u0435 ASTM F1921","publisher":{"@id":"https:\/\/www.hottacktest.com\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.hottacktest.com\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"bg-BG"},{"@type":"Organization","@id":"https:\/\/www.hottacktest.com\/#organization","name":"\u0421\u043e\u0444\u0442\u0433\u0435\u043b \u0442\u0435\u0441\u0442","url":"https:\/\/www.hottacktest.com\/","logo":{"@type":"ImageObject","inLanguage":"bg-BG","@id":"https:\/\/www.hottacktest.com\/#\/schema\/logo\/image\/","url":"https:\/\/www.hottacktest.com\/wp-content\/uploads\/2025\/01\/Softgel-Test-Logo.webp","contentUrl":"https:\/\/www.hottacktest.com\/wp-content\/uploads\/2025\/01\/Softgel-Test-Logo.webp","width":836,"height":238,"caption":"Softgel Test"},"image":{"@id":"https:\/\/www.hottacktest.com\/#\/schema\/logo\/image\/"}}]}},"_links":{"self":[{"href":"https:\/\/www.hottacktest.com\/bg\/wp-json\/wp\/v2\/pages\/311","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.hottacktest.com\/bg\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.hottacktest.com\/bg\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.hottacktest.com\/bg\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/www.hottacktest.com\/bg\/wp-json\/wp\/v2\/comments?post=311"}],"version-history":[{"count":5,"href":"https:\/\/www.hottacktest.com\/bg\/wp-json\/wp\/v2\/pages\/311\/revisions"}],"predecessor-version":[{"id":779,"href":"https:\/\/www.hottacktest.com\/bg\/wp-json\/wp\/v2\/pages\/311\/revisions\/779"}],"wp:attachment":[{"href":"https:\/\/www.hottacktest.com\/bg\/wp-json\/wp\/v2\/media?parent=311"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}