{"id":1261,"date":"2026-05-12T08:14:06","date_gmt":"2026-05-12T08:14:06","guid":{"rendered":"https:\/\/www.packtests.com\/?post_type=standard&#038;p=1261"},"modified":"2026-05-12T09:09:33","modified_gmt":"2026-05-12T09:09:33","slug":"astm-f1921","status":"publish","type":"standard","link":"https:\/\/www.packtests.com\/cs\/standard\/astm-f1921\/","title":{"rendered":"ASTM F1921"},"content":{"rendered":"<div data-elementor-type=\"wp-post\" data-elementor-id=\"1261\" class=\"elementor elementor-1261\" data-elementor-post-type=\"standard\">\n\t\t\t\t<div class=\"elementor-element elementor-element-5ec1237 e-flex e-con-boxed e-con e-parent\" data-id=\"5ec1237\" 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-b53c995 elementor-widget elementor-widget-text-editor\" data-id=\"b53c995\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h2>Norma ASTM F1921 a zku\u0161ebn\u00ed metoda pro zkou\u0161ku p\u0159ilnavosti za tepla<\/h2><p>Norma ASTM F1921 definuje <strong>laboratorn\u00ed metoda m\u011b\u0159en\u00ed pevnosti tepeln\u00fdch svar\u016f bezprost\u0159edn\u011b po jejich vytvo\u0159en\u00ed<\/strong>, ne\u017e materi\u00e1l vychladne na teplotu okol\u00ed. Tato vlastnost \u2013 zn\u00e1m\u00e1 jako <em>pevnost v tahu za tepla<\/em>\u2014je kl\u00ed\u010dov\u00e9 v prost\u0159ed\u00ed vysokorychlostn\u00edho balen\u00ed, zejm\u00e9na <strong>form-fill-seal (FFS)<\/strong> procesy.<\/p><p>Na str\u00e1nk\u00e1ch <strong>metoda zkou\u0161ky p\u0159ilnavosti za tepla<\/strong> simuluje skute\u010dn\u00e9 podm\u00ednky ut\u011bsn\u011bn\u00ed t\u00edm, \u017ee na termoplastick\u00e9 f\u00f3lie p\u016fsob\u00ed \u0159\u00edzen\u00fdm teplem a tlakem.<\/p><p>Na rozd\u00edl od b\u011b\u017en\u00fdch zkou\u0161ek pevnosti t\u011bsn\u011bn\u00ed prov\u00e1d\u011bn\u00fdch p\u0159i pokojov\u00e9 teplot\u011b se podle normy ASTM F1921 a metodiky zkou\u0161ky \u201ehot tack\u201c hodnot\u00ed <strong>kontrolovat integritu t\u011bsn\u011bn\u00ed v re\u00e1ln\u00e9m \u010dase p\u0159i tepeln\u00e9m nam\u00e1h\u00e1n\u00ed<\/strong>, co\u017e m\u00e1 z\u00e1sadn\u00ed v\u00fdznam pro stabilitu v\u00fdroby a spolehlivost balen\u00ed.<\/p><h2>Postup zkou\u0161ky p\u0159ilnavosti za tepla<\/h2><p>Norma ASTM F1921 stanovuje pevnost tepeln\u00e9ho spoje bezprost\u0159edn\u011b po jeho vytvo\u0159en\u00ed. Zku\u0161ebn\u00ed cyklus zahrnuje ut\u011bsn\u011bn\u00ed, otev\u0159en\u00ed \u010delist\u00ed, vyta\u017een\u00ed, prodlevu\/ochlazen\u00ed a odd\u011blen\u00ed \u010delist\u00ed za \u00fa\u010delem m\u011b\u0159en\u00ed s\u00edly.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-ef8e840 e-con-full e-flex e-con e-child\" data-id=\"ef8e840\" data-element_type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-8140b4b e-con-full e-flex e-con e-child\" data-id=\"8140b4b\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-e756c01 elementor-widget__width-inherit elementor-position-top elementor-widget elementor-widget-image-box\" data-id=\"e756c01\" data-element_type=\"widget\" data-widget_type=\"image-box.default\">\n\t\t\t\t\t<div class=\"elementor-image-box-wrapper\"><figure class=\"elementor-image-box-img\"><img fetchpriority=\"high\" decoding=\"async\" width=\"300\" height=\"200\" src=\"https:\/\/www.packtests.com\/wp-content\/uploads\/2026\/05\/Hot-Tack-Testing-Process-1-Seal.webp\" class=\"attachment-large size-large wp-image-1278\" alt=\"Postup zkou\u0161ky p\u0159ilnavosti za tepla \u2013 1. t\u011bsn\u011bn\u00ed\" title=\"\" srcset=\"https:\/\/www.packtests.com\/wp-content\/uploads\/2026\/05\/Hot-Tack-Testing-Process-1-Seal.webp 300w, https:\/\/www.packtests.com\/wp-content\/uploads\/2026\/05\/Hot-Tack-Testing-Process-1-Seal-18x12.webp 18w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/figure><div class=\"elementor-image-box-content\"><h3 class=\"elementor-image-box-title\">1. Pe\u010de\u0165<\/h3><p class=\"elementor-image-box-description\">Dva prou\u017eky se sva\u0159uj\u00ed p\u0159i stanoven\u00e9 teplot\u011b, tlaku a dob\u011b dr\u017een\u00ed.<\/p><\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4658d39 elementor-widget__width-initial elementor-view-default elementor-widget elementor-widget-icon\" data-id=\"4658d39\" data-element_type=\"widget\" data-widget_type=\"icon.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-icon-wrapper\">\n\t\t\t<div class=\"elementor-icon\">\n\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-long-arrow-alt-right\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M313.941 216H12c-6.627 0-12 5.373-12 12v56c0 6.627 5.373 12 12 12h301.941v46.059c0 21.382 25.851 32.09 40.971 16.971l86.059-86.059c9.373-9.373 9.373-24.569 0-33.941l-86.059-86.059c-15.119-15.119-40.971-4.411-40.971 16.971V216z\"><\/path><\/svg>\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-85446db elementor-widget__width-inherit elementor-position-top elementor-widget elementor-widget-image-box\" data-id=\"85446db\" data-element_type=\"widget\" data-widget_type=\"image-box.default\">\n\t\t\t\t\t<div class=\"elementor-image-box-wrapper\"><figure class=\"elementor-image-box-img\"><img decoding=\"async\" width=\"300\" height=\"200\" src=\"https:\/\/www.packtests.com\/wp-content\/uploads\/2026\/05\/Hot-Tack-Testing-Process-2-Open-Jaws.webp\" class=\"attachment-large size-large wp-image-1279\" alt=\"Zku\u0161ebn\u00ed postup pro zkou\u0161ku p\u0159ilnavosti za tepla \u2013 2 otev\u0159en\u00e9 \u010delisti\" title=\"\" srcset=\"https:\/\/www.packtests.com\/wp-content\/uploads\/2026\/05\/Hot-Tack-Testing-Process-2-Open-Jaws.webp 300w, https:\/\/www.packtests.com\/wp-content\/uploads\/2026\/05\/Hot-Tack-Testing-Process-2-Open-Jaws-18x12.webp 18w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/figure><div class=\"elementor-image-box-content\"><h3 class=\"elementor-image-box-title\">2. Otev\u0159en\u00e9 \u010delisti<\/h3><p class=\"elementor-image-box-description\">\u010celisti se otev\u0159ou a ut\u011bsn\u011bn\u00e1 oblast se uvoln\u00ed.<\/p><\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-81869d6 elementor-widget__width-initial elementor-view-default elementor-widget elementor-widget-icon\" data-id=\"81869d6\" data-element_type=\"widget\" data-widget_type=\"icon.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-icon-wrapper\">\n\t\t\t<div class=\"elementor-icon\">\n\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-long-arrow-alt-right\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M313.941 216H12c-6.627 0-12 5.373-12 12v56c0 6.627 5.373 12 12 12h301.941v46.059c0 21.382 25.851 32.09 40.971 16.971l86.059-86.059c9.373-9.373 9.373-24.569 0-33.941l-86.059-86.059c-15.119-15.119-40.971-4.411-40.971 16.971V216z\"><\/path><\/svg>\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-82dcd8d elementor-widget__width-inherit elementor-position-top elementor-widget elementor-widget-image-box\" data-id=\"82dcd8d\" data-element_type=\"widget\" data-widget_type=\"image-box.default\">\n\t\t\t\t\t<div class=\"elementor-image-box-wrapper\"><figure class=\"elementor-image-box-img\"><img decoding=\"async\" width=\"300\" height=\"200\" src=\"https:\/\/www.packtests.com\/wp-content\/uploads\/2026\/05\/Hot-Tack-Testing-Process-3-Withdraw.webp\" class=\"attachment-large size-large wp-image-1280\" alt=\"Zkou\u0161ka p\u0159ilnavosti za tepla \u2013 postup 3: Odta\u017een\u00ed\" title=\"\" srcset=\"https:\/\/www.packtests.com\/wp-content\/uploads\/2026\/05\/Hot-Tack-Testing-Process-3-Withdraw.webp 300w, https:\/\/www.packtests.com\/wp-content\/uploads\/2026\/05\/Hot-Tack-Testing-Process-3-Withdraw-18x12.webp 18w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/figure><div class=\"elementor-image-box-content\"><h3 class=\"elementor-image-box-title\">3. V\u00fdb\u011br<\/h3><p class=\"elementor-image-box-description\">Vzorek se automaticky vyjmou z \u010delist\u00ed.<\/p><\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-3657b98 e-con-full e-flex e-con e-child\" data-id=\"3657b98\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-e93267b elementor-widget__width-initial elementor-view-default elementor-widget elementor-widget-icon\" data-id=\"e93267b\" data-element_type=\"widget\" data-widget_type=\"icon.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-icon-wrapper\">\n\t\t\t<div class=\"elementor-icon\">\n\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-long-arrow-alt-right\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M313.941 216H12c-6.627 0-12 5.373-12 12v56c0 6.627 5.373 12 12 12h301.941v46.059c0 21.382 25.851 32.09 40.971 16.971l86.059-86.059c9.373-9.373 9.373-24.569 0-33.941l-86.059-86.059c-15.119-15.119-40.971-4.411-40.971 16.971V216z\"><\/path><\/svg>\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-17acaff elementor-widget__width-inherit elementor-position-top elementor-widget elementor-widget-image-box\" data-id=\"17acaff\" data-element_type=\"widget\" data-widget_type=\"image-box.default\">\n\t\t\t\t\t<div class=\"elementor-image-box-wrapper\"><figure class=\"elementor-image-box-img\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"200\" src=\"https:\/\/www.packtests.com\/wp-content\/uploads\/2026\/05\/Hot-Tack-Testing-Process-4-Delay-Cooling.webp\" class=\"attachment-large size-large wp-image-1281\" alt=\"Proces zkou\u0161ky p\u0159ilnavosti za tepla 4 \u2013 Zpo\u017ed\u011bn\u00e9 ochlazov\u00e1n\u00ed\" title=\"\" srcset=\"https:\/\/www.packtests.com\/wp-content\/uploads\/2026\/05\/Hot-Tack-Testing-Process-4-Delay-Cooling.webp 300w, https:\/\/www.packtests.com\/wp-content\/uploads\/2026\/05\/Hot-Tack-Testing-Process-4-Delay-Cooling-18x12.webp 18w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/figure><div class=\"elementor-image-box-content\"><h3 class=\"elementor-image-box-title\">4. Zpo\u017ed\u011bn\u00ed \/ Chlazen\u00ed<\/h3><p class=\"elementor-image-box-description\">Po otev\u0159en\u00ed \u010delist\u00ed za\u010dne p\u0159ednastaven\u00e1 prodleva (doba ochlazov\u00e1n\u00ed).<\/p><\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e6530af elementor-widget__width-initial elementor-view-default elementor-widget elementor-widget-icon\" data-id=\"e6530af\" data-element_type=\"widget\" data-widget_type=\"icon.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-icon-wrapper\">\n\t\t\t<div class=\"elementor-icon\">\n\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-long-arrow-alt-right\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M313.941 216H12c-6.627 0-12 5.373-12 12v56c0 6.627 5.373 12 12 12h301.941v46.059c0 21.382 25.851 32.09 40.971 16.971l86.059-86.059c9.373-9.373 9.373-24.569 0-33.941l-86.059-86.059c-15.119-15.119-40.971-4.411-40.971 16.971V216z\"><\/path><\/svg>\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f33db0e elementor-widget__width-inherit elementor-position-top elementor-widget elementor-widget-image-box\" data-id=\"f33db0e\" data-element_type=\"widget\" data-widget_type=\"image-box.default\">\n\t\t\t\t\t<div class=\"elementor-image-box-wrapper\"><figure class=\"elementor-image-box-img\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"200\" src=\"https:\/\/www.packtests.com\/wp-content\/uploads\/2026\/05\/Hot-Tack-Testing-Process-5-Separate-Measure.webp\" class=\"attachment-large size-large wp-image-1282\" alt=\"Postup zkou\u0161ky p\u0159ilnavosti za tepla 5: Odd\u011blen\u00ed a m\u011b\u0159en\u00ed\" title=\"\" srcset=\"https:\/\/www.packtests.com\/wp-content\/uploads\/2026\/05\/Hot-Tack-Testing-Process-5-Separate-Measure.webp 300w, https:\/\/www.packtests.com\/wp-content\/uploads\/2026\/05\/Hot-Tack-Testing-Process-5-Separate-Measure-18x12.webp 18w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/figure><div class=\"elementor-image-box-content\"><h3 class=\"elementor-image-box-title\">5. Odd\u011blit a odm\u011b\u0159it<\/h3><p class=\"elementor-image-box-description\">\u00dachyty se odd\u011bluj\u00ed konstantn\u00ed rychlost\u00ed a m\u011b\u0159\u00ed se s\u00edla pot\u0159ebn\u00e1 k otev\u0159en\u00ed t\u011bsn\u011bn\u00ed a\u017e do jeho selh\u00e1n\u00ed.<\/p><\/div><\/div>\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-c1d4788 elementor-widget elementor-widget-text-editor\" data-id=\"c1d4788\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h2>Kl\u00ed\u010dov\u00e9 prom\u011bnn\u00e9 p\u0159i zkou\u0161k\u00e1ch podle normy ASTM F1921<\/h2><ul><li><strong>Teplota ut\u011bsn\u011bn\u00ed:<\/strong> Obvykle se m\u011bn\u00ed tak, aby se vytvo\u0159ila k\u0159ivka tepeln\u00e9 p\u0159ilnavosti<\/li><li><strong>Doba zdr\u017een\u00ed:<\/strong><ul><li>vrstvy \u2264 25 \u00b5m: ~0,5 s<\/li><li>F\u00f3lie o tlou\u0161\u0165ce 25\u201364 \u00b5m: ~1,0 s<\/li><li>64 \u00b5m vrstvy: ~2,5 s<\/li><\/ul><\/li><li><strong>Tlak ut\u011bsn\u011bn\u00ed:<\/strong> 15\u201330 N\/cm\u00b2<\/li><li><strong>Doba chlazen\u00ed \/ doba zpo\u017ed\u011bn\u00ed:<\/strong> Stanovuje \u010dasov\u00fd pr\u016fb\u011bh m\u011b\u0159en\u00ed<\/li><li><strong>Rychlost separace:<\/strong> Obvykle 200 mm\/min (metoda A)<\/li><\/ul><p>Tyto parametry maj\u00ed p\u0159\u00edm\u00fd vliv na v\u00fdsledn\u00fd <strong>pevnost tepeln\u00e9ho sva\u0159ov\u00e1n\u00ed flexibiln\u00edch obal\u016f<\/strong> materi\u00e1ly.<\/p><h2>Tester p\u0159ilnavosti za tepla: Nezbytn\u00e9 vybaven\u00ed pro normu ASTM F1921<\/h2><p>A <strong>p\u0159\u00edstroj na m\u011b\u0159en\u00ed p\u0159ilnavosti za tepla<\/strong> je speci\u00e1ln\u011b navr\u017een tak, aby napodobil proces sva\u0159ov\u00e1n\u00ed a okam\u017eit\u00e9ho odlupov\u00e1n\u00ed definovan\u00fd v norm\u011b ASTM F1921. Pokro\u010dil\u00e9 syst\u00e9my \u2013 jako nap\u0159\u00edklad ty, kter\u00e9 vyvinula spole\u010dnost Cell Instruments Co., Ltd. \u2013 nab\u00edzej\u00ed:<\/p><ul><li><strong>\u0158\u00eddic\u00ed syst\u00e9my zalo\u017een\u00e9 na PLC<\/strong> pro zajistit opakovatelnost<\/li><li><strong>PID regulace teploty (p\u0159esnost \u00b10,2 \u00b0C)<\/strong><\/li><li><strong>Automatizovan\u00e9 testovac\u00ed cykly<\/strong> odstran\u011bn\u00ed vlivu obsluhy<\/li><li><strong>Nastaviteln\u00e9 zku\u0161ebn\u00ed rychlosti a tlaky<\/strong><\/li><li><strong>M\u011b\u0159en\u00ed s\u00edly s vysok\u00fdm rozli\u0161en\u00edm<\/strong><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-696a839 e-con-full e-flex e-con e-child\" data-id=\"696a839\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-a44a8e6 elementor-widget elementor-widget-text-editor\" data-id=\"a44a8e6\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h3>Doporu\u010den\u00e9 \u0159e\u0161en\u00ed<\/h3><p>\u0158ada Cell Instruments HTT podporuje:<\/p><ul><li><strong>Metoda A (pevn\u00e9 zpo\u017ed\u011bn\u00ed)<\/strong> a <strong>Metoda B (prom\u011bnn\u00e9 zpo\u017ed\u011bn\u00ed)<\/strong><\/li><li>R\u016fzn\u00e9 re\u017eimy zkou\u0161ek: p\u0159ilnavost za tepla, odlupov\u00e1n\u00ed, tahov\u00e1 zkou\u0161ka, tepeln\u00e9 sva\u0159ov\u00e1n\u00ed<\/li><li>Vysokorychlostn\u00ed testov\u00e1n\u00ed a\u017e do <strong>12 000 mm\/min<\/strong> (HTT-02)<\/li><\/ul><p>Tato flexibilita umo\u017e\u0148uje p\u0159esnou charakterizaci r\u016fzn\u00fdch materi\u00e1l\u016f a jejich t\u011bsnic\u00edch vlastnost\u00ed.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1d56d80 elementor-widget elementor-widget-image\" data-id=\"1d56d80\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"400\" height=\"638\" src=\"https:\/\/www.packtests.com\/wp-content\/uploads\/2026\/05\/ASTM-F1921-Hot-Tack-Tester.webp\" class=\"attachment-large size-large wp-image-1283\" alt=\"Zku\u0161ebn\u00ed za\u0159\u00edzen\u00ed pro m\u011b\u0159en\u00ed p\u0159ilnavosti za tepla podle normy ASTM F1921\" srcset=\"https:\/\/www.packtests.com\/wp-content\/uploads\/2026\/05\/ASTM-F1921-Hot-Tack-Tester.webp 400w, https:\/\/www.packtests.com\/wp-content\/uploads\/2026\/05\/ASTM-F1921-Hot-Tack-Tester-188x300.webp 188w, https:\/\/www.packtests.com\/wp-content\/uploads\/2026\/05\/ASTM-F1921-Hot-Tack-Tester-8x12.webp 8w\" sizes=\"(max-width: 400px) 100vw, 400px\" title=\"\">\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c31033e elementor-widget elementor-widget-text-editor\" data-id=\"c31033e\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h2><strong>Pevnost v teplem ut\u011bsn\u011bn\u00fdch spoj\u016f u flexibiln\u00edch obal\u016f<\/strong><\/h2><p>Na str\u00e1nk\u00e1ch <strong>pevnost tepeln\u00e9ho sva\u0159ov\u00e1n\u00ed flexibiln\u00edch obal\u016f<\/strong> ur\u010duje, zda obal vydr\u017e\u00ed nam\u00e1h\u00e1n\u00ed bezprost\u0159edn\u011b po uzav\u0159en\u00ed. Slab\u00e1 teplotn\u00ed p\u0159ilnavost m\u016f\u017ee v\u00e9st k:<\/p><ul><li>Ut\u011bsn\u011bn\u00ed otvoru b\u011bhem pln\u011bn\u00ed<\/li><li>Zne\u010di\u0161t\u011bn\u00ed nebo \u00fanik produktu<\/li><li>Sn\u00ed\u017een\u00e1 \u00fa\u010dinnost balen\u00ed<\/li><li>Zv\u00fd\u0161en\u00fd objem odpadu a prostoje<\/li><\/ul><p>Norma ASTM F1921 pom\u00e1h\u00e1 v\u00fdrobc\u016fm:<\/p><ul><li><strong>Hodnocen\u00ed v\u00fdkonu materi\u00e1lu<\/strong><\/li><li><strong>Optimalizovat parametry ut\u011bsn\u011bn\u00ed<\/strong><\/li><li><strong>Zajistit spolehlivost proces\u016f p\u0159i provozu za\u0159\u00edzen\u00ed FFS<\/strong><\/li><\/ul><h2>Zku\u0161ebn\u00ed metody podle normy ASTM F1921<br \/>\u2014Metoda A vs. metoda B<\/h2><p>Norma ASTM F1921 stanov\u00ed dva odli\u0161n\u00e9 p\u0159\u00edstupy:<\/p><h3>Metoda A \u2013 Pevn\u00e9 zpo\u017ed\u011bn\u00ed<\/h3><ul><li>M\u011b\u0159\u00ed pevnost t\u011bsn\u011bn\u00ed p\u0159i <strong>konkr\u00e9tn\u00ed doby chlazen\u00ed<\/strong><\/li><li>Vytvo\u0159\u00ed <strong>K\u0159ivka vztahu mezi pevnost\u00ed p\u0159i p\u0159ilepen\u00ed za tepla a \u010dasem<\/strong><\/li><li>Vhodn\u00e9 pro podrobnou anal\u00fdzu chladic\u00edho chov\u00e1n\u00ed<\/li><\/ul><h3>Metoda B \u2013 Prom\u011bnn\u00e9 zpo\u017ed\u011bn\u00ed<\/h3><ul><li>Opat\u0159en\u00ed <strong>maxim\u00e1ln\u00ed s\u00edla po uplynut\u00ed zvolen\u00e9 prodlevy<\/strong><\/li><li>Rychlej\u0161\u00ed a jednodu\u0161\u0161\u00ed prov\u00e1d\u011bn\u00ed rutinn\u00edch kontrol kvality<\/li><li>Ide\u00e1ln\u00ed pro <strong>produk\u010dn\u00ed prost\u0159ed\u00ed<\/strong><\/li><\/ul><h2>Zp\u016fsoby selh\u00e1n\u00ed p\u0159i zkou\u0161k\u00e1ch \u201ehot tack\u201c<\/h2><p>Pro spr\u00e1vnou interpretaci v\u00fdsledk\u016f normy ASTM F1921 je nezbytn\u00e9 porozum\u011bt zp\u016fsob\u016fm odtr\u017een\u00ed t\u011bsn\u011bn\u00ed. R\u016fzn\u00e9 zp\u016fsoby selh\u00e1n\u00ed poukazuj\u00ed na r\u016fzn\u00e9 probl\u00e9my s materi\u00e1lem nebo v\u00fdrobn\u00edm procesem.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-63ec2a0 e-con-full e-flex e-con e-child\" data-id=\"63ec2a0\" data-element_type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-b7ab802 e-con-full e-grid e-con e-child\" data-id=\"b7ab802\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-34fc5c5 elementor-widget__width-inherit elementor-position-top elementor-widget elementor-widget-image-box\" data-id=\"34fc5c5\" data-element_type=\"widget\" data-widget_type=\"image-box.default\">\n\t\t\t\t\t<div class=\"elementor-image-box-wrapper\"><figure class=\"elementor-image-box-img\"><img loading=\"lazy\" decoding=\"async\" width=\"162\" height=\"122\" src=\"https:\/\/www.packtests.com\/wp-content\/uploads\/2026\/05\/Failure-Modes-in-Hot-Tack-Testing-1.webp\" class=\"attachment-large size-large wp-image-1284\" alt=\"Zp\u016fsoby selh\u00e1n\u00ed p\u0159i zkou\u0161k\u00e1ch \u201ehot tack\u201c 1\" title=\"\" srcset=\"https:\/\/www.packtests.com\/wp-content\/uploads\/2026\/05\/Failure-Modes-in-Hot-Tack-Testing-1.webp 162w, https:\/\/www.packtests.com\/wp-content\/uploads\/2026\/05\/Failure-Modes-in-Hot-Tack-Testing-1-16x12.webp 16w\" sizes=\"(max-width: 162px) 100vw, 162px\" \/><\/figure><div class=\"elementor-image-box-content\"><h3 class=\"elementor-image-box-title\">Odlepen\u00ed n\u00e1lepky<\/h3><p class=\"elementor-image-box-description\"><p style=\"text-align: left\">K odd\u011blen\u00ed doch\u00e1z\u00ed na rozhran\u00ed mezi t\u011bmito dv\u011bma povrchy.<br><b>Ozna\u010duje: <\/b>\u0160patn\u00e1 adheze na rozhran\u00ed nebo nedostate\u010dn\u00e9 teplo\/tlak.<\/p><\/p><\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9691fc8 elementor-widget__width-inherit elementor-position-top elementor-widget elementor-widget-image-box\" data-id=\"9691fc8\" data-element_type=\"widget\" data-widget_type=\"image-box.default\">\n\t\t\t\t\t<div class=\"elementor-image-box-wrapper\"><figure class=\"elementor-image-box-img\"><img loading=\"lazy\" decoding=\"async\" width=\"162\" height=\"122\" src=\"https:\/\/www.packtests.com\/wp-content\/uploads\/2026\/05\/Failure-Modes-in-Hot-Tack-Testing-2.webp\" class=\"attachment-large size-large wp-image-1285\" alt=\"Zp\u016fsoby selh\u00e1n\u00ed p\u0159i zkou\u0161k\u00e1ch \u201ehot tack\u201c 2\" title=\"\" srcset=\"https:\/\/www.packtests.com\/wp-content\/uploads\/2026\/05\/Failure-Modes-in-Hot-Tack-Testing-2.webp 162w, https:\/\/www.packtests.com\/wp-content\/uploads\/2026\/05\/Failure-Modes-in-Hot-Tack-Testing-2-16x12.webp 16w\" sizes=\"(max-width: 162px) 100vw, 162px\" \/><\/figure><div class=\"elementor-image-box-content\"><h3 class=\"elementor-image-box-title\">Soudr\u017en\u00fd peeling<\/h3><p class=\"elementor-image-box-description\"><p style=\"text-align: left\">K poru\u0161e doch\u00e1z\u00ed v jedn\u00e9 z polymerov\u00fdch vrstev.<br><b>Ozna\u010duje:<\/b> Siln\u00e1 mezif\u00e1zov\u00e1 vazba; selh\u00e1v\u00e1 samotn\u00fd materi\u00e1l.<\/p><\/p><\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b8ab6b4 elementor-widget__width-inherit elementor-position-top elementor-widget elementor-widget-image-box\" data-id=\"b8ab6b4\" data-element_type=\"widget\" data-widget_type=\"image-box.default\">\n\t\t\t\t\t<div class=\"elementor-image-box-wrapper\"><figure class=\"elementor-image-box-img\"><img loading=\"lazy\" decoding=\"async\" width=\"162\" height=\"122\" src=\"https:\/\/www.packtests.com\/wp-content\/uploads\/2026\/05\/Failure-Modes-in-Hot-Tack-Testing-3.webp\" class=\"attachment-large size-large wp-image-1286\" alt=\"Zp\u016fsoby selh\u00e1n\u00ed p\u0159i zkou\u0161k\u00e1ch \u201ehot tack\u201c 3\" title=\"\" srcset=\"https:\/\/www.packtests.com\/wp-content\/uploads\/2026\/05\/Failure-Modes-in-Hot-Tack-Testing-3.webp 162w, https:\/\/www.packtests.com\/wp-content\/uploads\/2026\/05\/Failure-Modes-in-Hot-Tack-Testing-3-16x12.webp 16w\" sizes=\"(max-width: 162px) 100vw, 162px\" \/><\/figure><div class=\"elementor-image-box-content\"><h3 class=\"elementor-image-box-title\">Delaminace<\/h3><p class=\"elementor-image-box-description\"><p style=\"text-align: left\">Odd\u011blen\u00ed jednotliv\u00fdch vrstev ve v\u00edcevrstv\u00e9 struktu\u0159e. <br><b>Ozna\u010duje:<\/b> Slab\u00e1 soudr\u017enost mezi vrstvami v laminovan\u00fdch materi\u00e1lech.<\/p><\/p><\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-90ba3b6 elementor-widget__width-inherit elementor-position-top elementor-widget elementor-widget-image-box\" data-id=\"90ba3b6\" data-element_type=\"widget\" data-widget_type=\"image-box.default\">\n\t\t\t\t\t<div class=\"elementor-image-box-wrapper\"><figure class=\"elementor-image-box-img\"><img loading=\"lazy\" decoding=\"async\" width=\"162\" height=\"122\" src=\"https:\/\/www.packtests.com\/wp-content\/uploads\/2026\/05\/Failure-Modes-in-Hot-Tack-Testing-4.webp\" class=\"attachment-large size-large wp-image-1287\" alt=\"Zp\u016fsoby selh\u00e1n\u00ed p\u0159i zkou\u0161k\u00e1ch \u201ehot tack\u201c 4\" title=\"\" srcset=\"https:\/\/www.packtests.com\/wp-content\/uploads\/2026\/05\/Failure-Modes-in-Hot-Tack-Testing-4.webp 162w, https:\/\/www.packtests.com\/wp-content\/uploads\/2026\/05\/Failure-Modes-in-Hot-Tack-Testing-4-16x12.webp 16w\" sizes=\"(max-width: 162px) 100vw, 162px\" \/><\/figure><div class=\"elementor-image-box-content\"><h3 class=\"elementor-image-box-title\">P\u0159est\u00e1vka na ob\u010derstven\u00ed<\/h3><p class=\"elementor-image-box-description\"><p style=\"text-align: left\">Film se odtrh\u00e1v\u00e1 od oblasti t\u011bsn\u011bn\u00ed<br><b>Ozna\u010duje:<\/b> T\u011bsn\u011bn\u00ed je pevn\u011bj\u0161\u00ed ne\u017e podklad.<\/p><\/p><\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f67fd38 elementor-widget__width-inherit elementor-position-top elementor-widget elementor-widget-image-box\" data-id=\"f67fd38\" data-element_type=\"widget\" data-widget_type=\"image-box.default\">\n\t\t\t\t\t<div class=\"elementor-image-box-wrapper\"><figure class=\"elementor-image-box-img\"><img loading=\"lazy\" decoding=\"async\" width=\"162\" height=\"122\" src=\"https:\/\/www.packtests.com\/wp-content\/uploads\/2026\/05\/Failure-Modes-in-Hot-Tack-Testing-5.webp\" class=\"attachment-large size-large wp-image-1288\" alt=\"Zp\u016fsoby selh\u00e1n\u00ed p\u0159i zkou\u0161k\u00e1ch \u201ehot tack\u201c 5\" title=\"\" srcset=\"https:\/\/www.packtests.com\/wp-content\/uploads\/2026\/05\/Failure-Modes-in-Hot-Tack-Testing-5.webp 162w, https:\/\/www.packtests.com\/wp-content\/uploads\/2026\/05\/Failure-Modes-in-Hot-Tack-Testing-5-16x12.webp 16w\" sizes=\"(max-width: 162px) 100vw, 162px\" \/><\/figure><div class=\"elementor-image-box-content\"><h3 class=\"elementor-image-box-title\">Vzd\u00e1len\u00e1 p\u0159est\u00e1vka<\/h3><p class=\"elementor-image-box-description\"><p style=\"text-align: left\">K prasknut\u00ed doch\u00e1z\u00ed v m\u00edst\u011b vzd\u00e1len\u00e9m od t\u011bsn\u011bn\u00ed.<br><b>Ozna\u010duje:<\/b> T\u011bsn\u011bn\u00ed je mnohem pevn\u011bj\u0161\u00ed ne\u017e samotn\u00fd materi\u00e1l.<\/p><\/p><\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b467121 elementor-widget__width-inherit elementor-position-top elementor-widget elementor-widget-image-box\" data-id=\"b467121\" data-element_type=\"widget\" data-widget_type=\"image-box.default\">\n\t\t\t\t\t<div class=\"elementor-image-box-wrapper\"><figure class=\"elementor-image-box-img\"><img loading=\"lazy\" decoding=\"async\" width=\"162\" height=\"122\" src=\"https:\/\/www.packtests.com\/wp-content\/uploads\/2026\/05\/Failure-Modes-in-Hot-Tack-Testing-6.webp\" class=\"attachment-large size-large wp-image-1289\" alt=\"Zp\u016fsoby selh\u00e1n\u00ed p\u0159i zkou\u0161k\u00e1ch \u201ehot tack\u201c 6\" title=\"\" srcset=\"https:\/\/www.packtests.com\/wp-content\/uploads\/2026\/05\/Failure-Modes-in-Hot-Tack-Testing-6.webp 162w, https:\/\/www.packtests.com\/wp-content\/uploads\/2026\/05\/Failure-Modes-in-Hot-Tack-Testing-6-16x12.webp 16w\" sizes=\"(max-width: 162px) 100vw, 162px\" \/><\/figure><div class=\"elementor-image-box-content\"><h3 class=\"elementor-image-box-title\">Prota\u017een\u00ed materi\u00e1lu<\/h3><p class=\"elementor-image-box-description\"><p style=\"text-align: left\">Nezpevn\u011bn\u00fd materi\u00e1l se p\u0159ed p\u0159etr\u017een\u00edm v\u00fdrazn\u011b nat\u00e1hne.<br><b>Ozna\u010duje:<\/b> Vysok\u00e1 ta\u017enost a pru\u017enost f\u00f3lie.<\/p><\/p><\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-17b150b elementor-widget__width-inherit elementor-position-top elementor-widget elementor-widget-image-box\" data-id=\"17b150b\" data-element_type=\"widget\" data-widget_type=\"image-box.default\">\n\t\t\t\t\t<div class=\"elementor-image-box-wrapper\"><figure class=\"elementor-image-box-img\"><img loading=\"lazy\" decoding=\"async\" width=\"162\" height=\"122\" src=\"https:\/\/www.packtests.com\/wp-content\/uploads\/2026\/05\/Failure-Modes-in-Hot-Tack-Testing-7.webp\" class=\"attachment-large size-large wp-image-1290\" alt=\"Zp\u016fsoby selh\u00e1n\u00ed p\u0159i zkou\u0161k\u00e1ch \u201ehot tack\u201c 7\" title=\"\" srcset=\"https:\/\/www.packtests.com\/wp-content\/uploads\/2026\/05\/Failure-Modes-in-Hot-Tack-Testing-7.webp 162w, https:\/\/www.packtests.com\/wp-content\/uploads\/2026\/05\/Failure-Modes-in-Hot-Tack-Testing-7-16x12.webp 16w\" sizes=\"(max-width: 162px) 100vw, 162px\" \/><\/figure><div class=\"elementor-image-box-content\"><h3 class=\"elementor-image-box-title\">Odlupov\u00e1n\u00ed s prodlou\u017een\u00edm<\/h3><p class=\"elementor-image-box-description\"><p style=\"text-align: left\">Odlupov\u00e1n\u00ed doprov\u00e1zen\u00e9 v\u00fdrazn\u00fdm prodlou\u017een\u00edm neuzav\u0159en\u00e9ho materi\u00e1lu.<br><b>Ozna\u010duje:<\/b> Souvislost mezi selh\u00e1n\u00edm lepidla a ta\u017enost\u00ed materi\u00e1lu.<\/p><\/p><\/div><\/div>\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-544c157 elementor-widget elementor-widget-text-editor\" data-id=\"544c157\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h2>Vytvo\u0159en\u00ed k\u0159ivky \u201ehot tack\u201c pro optimalizaci procesu<\/h2><p>A <strong>k\u0159ivka tepeln\u00e9 p\u0159ilnavosti<\/strong> graf zn\u00e1zor\u0148uje z\u00e1vislost pevnosti t\u011bsn\u011bn\u00ed na teplot\u011b. Pom\u00e1h\u00e1 ur\u010dit:<\/p><ul><li>Po\u010d\u00e1te\u010dn\u00ed teplota ut\u011bsn\u011bn\u00ed (SIT)<\/li><li>Optim\u00e1ln\u00ed t\u011bsnic\u00ed okno<\/li><li>Maxim\u00e1ln\u00ed p\u0159ilnavost za tepla<\/li><\/ul><p>D\u00edky t\u011bmto \u00fadaj\u016fm mohou in\u017een\u00fd\u0159i <strong>dola\u010fovat parametry ut\u011bsn\u011bn\u00ed pro zaji\u0161t\u011bn\u00ed st\u00e1l\u00e9ho v\u00fdkonu balic\u00edho procesu<\/strong>.<\/p><h2>\u010casto kladen\u00e9 ot\u00e1zky t\u00fdkaj\u00edc\u00ed se normy ASTM F1921<\/h2><ol><li><strong> Jak\u00fd je hlavn\u00ed \u00fa\u010del normy ASTM F1921?<\/strong><br \/>Vyhodnocuje <strong>pevnost termoplastick\u00fdch t\u011bsn\u011bn\u00ed v tahu za tepla bezprost\u0159edn\u011b po ut\u011bsn\u011bn\u00ed<\/strong>, \u010d\u00edm\u017e se zajist\u00ed spolehlivost balen\u00ed b\u011bhem v\u00fdroby.<\/li><li><strong> V \u010dem se norma ASTM F1921 li\u0161\u00ed od normy ASTM F88?<\/strong><br \/><a href=\"https:\/\/store.astm.org\/f1921_f1921m-12r23.html\" target=\"_blank\" rel=\"noopener nofollow\">ASTM F1921<\/a> opat\u0159en\u00ed <strong>pevnost hork\u00e9ho spoje<\/strong>, zat\u00edmco norma ASTM F88 m\u011b\u0159\u00ed <strong>pevnost studen\u00e9ho spoje<\/strong> po vychladnut\u00ed.<\/li><li><strong> Kter\u00e1 odv\u011btv\u00ed vyu\u017e\u00edvaj\u00ed zkou\u0161ky p\u0159ilnavosti za tepla?<\/strong><br \/>Potravin\u00e1\u0159sk\u00fd, farmaceutick\u00fd, zdravotnick\u00fd a odv\u011btv\u00ed flexibiln\u00edch obal\u016f se na tuto zkou\u0161ku ve velk\u00e9 m\u00ed\u0159e spol\u00e9haj\u00ed.<\/li><li><strong> Jak\u00fd je rozd\u00edl mezi metodou A a metodou B?<\/strong><br \/>Metoda A m\u011b\u0159\u00ed s\u00edlu v pr\u016fb\u011bhu \u010dasu; metoda B zaznamen\u00e1v\u00e1 maxim\u00e1ln\u00ed s\u00edlu po ur\u010dit\u00e9 prodlev\u011b.<\/li><li><strong> Pro\u010d je p\u0159ilnavost za tepla d\u016fle\u017eit\u00e1 v procesech FFS?<\/strong><br \/>Vzhledem k tomu, \u017ee t\u011bsn\u011bn\u00ed jsou p\u0159ed ochlazen\u00edm vystavena nam\u00e1h\u00e1n\u00ed, m\u016f\u017ee nedostate\u010dn\u00e1 teplotn\u00ed p\u0159ilnavost zp\u016fsobit <strong>porucha t\u011bsn\u011bn\u00ed p\u0159i balen\u00ed<\/strong>.<\/li><\/ol>\t\t\t\t\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 F1921 and Hot Tack Test Method ASTM F1921 defines a laboratory method for measuring the strength of heat seals immediately after formation, before the material cools to ambient temperature. This property\u2014known as hot tack strength\u2014is critical in high-speed packaging environments, especially form-fill-seal (FFS) processes. The hot tack test method simulates actual sealing conditions by [&hellip;]<\/p>","protected":false},"featured_media":0,"parent":0,"template":"","meta":{"_acf_changed":false},"standard-category":[64],"class_list":["post-1261","standard","type-standard","status-publish","hentry","standard-category-astm"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.packtests.com\/cs\/wp-json\/wp\/v2\/standard\/1261","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.packtests.com\/cs\/wp-json\/wp\/v2\/standard"}],"about":[{"href":"https:\/\/www.packtests.com\/cs\/wp-json\/wp\/v2\/types\/standard"}],"version-history":[{"count":5,"href":"https:\/\/www.packtests.com\/cs\/wp-json\/wp\/v2\/standard\/1261\/revisions"}],"predecessor-version":[{"id":1297,"href":"https:\/\/www.packtests.com\/cs\/wp-json\/wp\/v2\/standard\/1261\/revisions\/1297"}],"wp:attachment":[{"href":"https:\/\/www.packtests.com\/cs\/wp-json\/wp\/v2\/media?parent=1261"}],"wp:term":[{"taxonomy":"standard-category","embeddable":true,"href":"https:\/\/www.packtests.com\/cs\/wp-json\/wp\/v2\/standard-category?post=1261"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}