{"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\/sl\/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>ASTM F1921 in preskusna metoda za vro\u010do lepljivost<\/h2><p>Standard ASTM F1921 opredeljuje <strong>laboratorijska metoda za merjenje trdnosti toplotnih zatesnitev takoj po njihovem nastanku<\/strong>, preden se material ohladi na sobno temperaturo. Ta lastnost \u2013 znana kot <em>trdnost pri vro\u010dem lepljenju<\/em>\u2014je klju\u010dnega pomena v okoljih za visokohitrostno pakiranje, zlasti <strong>izpolnjevanje in zapiranje (FFS)<\/strong> procesi.<\/p><p>Spletna stran <strong>metoda preskusa z vro\u010dim lepljenjem<\/strong> simulira dejanske pogoje tesnjenja z nadzorovanim segrevanjem in pritiskom na termoplasti\u010dne folije.<\/p><p>Za razliko od obi\u010dajnih preskusov trdnosti tesnila, ki se izvajajo pri sobni temperaturi, standard ASTM F1921 in preskusna metoda \u00bbhot tack\u00ab ocenjujeta <strong>preverjanje nepo\u0161kodovanosti tesnila v realnem \u010dasu pod toplotno obremenitvijo<\/strong>, zaradi \u010desar je izjemno pomemben za stabilnost proizvodnje in zanesljivost pakiranja.<\/p><h2>Postopek preskusa z vro\u010dim lepljenjem<\/h2><p>Standard ASTM F1921 dolo\u010da trdnost toplotnega spoja takoj po njegovem nastanku. Preskusni cikel vklju\u010duje spajanje, odpiranje \u010deljusti, umik, zakasnitev\/ohlajevanje in lo\u010ditev prijemal za merjenje sile.<\/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=\"Postopek presku\u0161anja z vro\u010dim vtiskom 1 Tesnilo\" 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. Tesnilo<\/h3><p class=\"elementor-image-box-description\">Dva traka se zatesnita pri dolo\u010deni temperaturi, tlaku in \u010dasu zadr\u017eevanja.<\/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=\"Postopek preskusa z vro\u010dim lepljenjem 2 \u2013 odprta \u010deljusta\" 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. Odprta \u010deljusti<\/h3><p class=\"elementor-image-box-description\">\u010celjusti se odprejo in zatesnjeno obmo\u010dje se sprosti.<\/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=\"Postopek presku\u0161anja z vro\u010dim vtiskom 3: Umik\" 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. Izpla\u010dilo<\/h3><p class=\"elementor-image-box-description\">Vzorec se samodejno izvle\u010de iz med \u010deljustmi.<\/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=\"Postopek presku\u0161anja z vro\u010dim vtiskom 4: Ohlajevanje z zamikom\" 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. Zamik \/ Hlajenje<\/h3><p class=\"elementor-image-box-description\">Po odprtju \u010deljusti se za\u010dne vnaprej nastavljena zakasnitev (\u010das hlajenja).<\/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=\"Postopek presku\u0161anja z vro\u010dim lepljenjem 5: Lo\u010ditev in merjenje\" 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. Lo\u010dite in odmerite<\/h3><p class=\"elementor-image-box-description\">Ro\u010daji se lo\u010dijo s konstantno hitrostjo, pri \u010demer se meri sila, potrebna za odprtje tesnila, vse do pretrganja.<\/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>Klju\u010dne spremenljivke pri presku\u0161anju po standardu ASTM F1921<\/h2><ul><li><strong>Temperatura tesnjenja:<\/strong> Obi\u010dajno se spreminja, da se ustvari krivulja vro\u010de lepljivosti<\/li><li><strong>\u010cas zadr\u017eevanja:<\/strong><ul><li>filmi \u226425 \u00b5m: ~0,5 s<\/li><li>Filmi debeline 25\u201364 \u00b5m: ~1,0 s<\/li><li>64 \u00b5m filmi: ~2,5 s<\/li><\/ul><\/li><li><strong>Tlak tesnjenja:<\/strong> 15\u201330 N\/cm\u00b2<\/li><li><strong>\u010cas hlajenja \/ \u010das zakasnitve:<\/strong> Dolo\u010da \u010dasovni potek merjenja<\/li><li><strong>Hitrost lo\u010devanja:<\/strong> Obi\u010dajno 200 mm\/min (metoda A)<\/li><\/ul><p>Ti parametri neposredno vplivajo na kon\u010dni rezultat <strong>trdnost vro\u010dega zatesnjevanja pro\u017enih embala\u017e<\/strong> materiali.<\/p><h2>Naprava za presku\u0161anje lepljivosti: nepogre\u0161ljiva oprema za standard ASTM F1921<\/h2><p>A <strong>naprava za merjenje lepljivosti<\/strong> je posebej zasnovan za ponovitev postopka tesnjenja in takoj\u0161njega lupljenja, opredeljenega v standardu ASTM F1921. Napredni sistemi \u2013 kot so tisti, ki jih je razvila dru\u017eba Cell Instruments Co., Ltd. \u2013 ponujajo:<\/p><ul><li><strong>Krmilni sistemi na osnovi PLC-jev<\/strong> zaradi ponovljivosti<\/li><li><strong>PID-regulacija temperature (natan\u010dnost \u00b10,2 \u00b0C)<\/strong><\/li><li><strong>Avtomatizirani testni cikli<\/strong> odprava vpliva operaterja<\/li><li><strong>Nastavljive preskusne hitrosti in tlaki<\/strong><\/li><li><strong>Merjenje sile z visoko lo\u010dljivostjo<\/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>Priporo\u010dena re\u0161itev<\/h3><p>Serija Cell Instruments HTT podpira:<\/p><ul><li><strong>Metoda A (fiksna zakasnitev)<\/strong> in . <strong>Metoda B (spremenljiva zakasnitev)<\/strong><\/li><li>Ve\u010d na\u010dinov presku\u0161anja: preskus lepljivosti pri visoki temperaturi, preskus odlepljanja, preskus natezne trdnosti, preskus toplotnega zatesnjevanja<\/li><li>Preskusi pri visokih hitrostih do <strong>12 000 mm\/min<\/strong> (HTT-02)<\/li><\/ul><p>Ta prilagodljivost omogo\u010da natan\u010dno opredelitev razli\u010dnih materialov in njihovega obna\u0161anja pri tesnjenju.<\/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=\"ASTM F1921 \u2013 naprava za presku\u0161anje lepljivosti pri visoki temperaturi\" 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>Trdnost vro\u010dega zatesnjevanja pro\u017enih embala\u017e<\/strong><\/h2><p>Spletna stran <strong>trdnost vro\u010dega zatesnjevanja pro\u017enih embala\u017e<\/strong> dolo\u010da, ali je embala\u017ea takoj po zaprtju sposobna prenesti obremenitev. Slaba takoj\u0161nja oprijemljivost lahko povzro\u010di:<\/p><ul><li>Odpiranje tesnila med polnjenjem<\/li><li>Onesna\u017eenje izdelka ali uhajanje<\/li><li>Zmanj\u0161ana u\u010dinkovitost pakiranja<\/li><li>Ve\u010d odpadkov in izpadov<\/li><\/ul><p>Standard ASTM F1921 pomaga proizvajalcem:<\/p><ul><li><strong>Ocena zmogljivosti materiala<\/strong><\/li><li><strong>Optimizirajte parametre tesnjenja<\/strong><\/li><li><strong>Zagotovite zanesljivost procesov pri operacijah FFS<\/strong><\/li><\/ul><h2>Preskusne metode po standardu ASTM F1921<br \/>\u2014Metoda A v primerjavi z metodo B<\/h2><p>Standard ASTM F1921 dolo\u010da dva razli\u010dna pristopa:<\/p><h3>Metoda A \u2013 Fiksna zakasnitev<\/h3><ul><li>Merjenje trdnosti tesnila pri <strong>konkretni \u010dasi hlajenja<\/strong><\/li><li>Ustvari <strong>krivulja trdnosti pri vro\u010dem lepljenju v odvisnosti od \u010dasa<\/strong><\/li><li>Primerno za podrobno analizo obna\u0161anja hlajenja<\/li><\/ul><h3>Metoda B \u2013 spremenljiv zamik<\/h3><ul><li>Ukrepi <strong>najve\u010dja sila po izbrani zakasnitvi<\/strong><\/li><li>Hitrej\u0161e in enostavnej\u0161e za rutinsko preverjanje kakovosti<\/li><li>Idealno za <strong>proizvodna okolja<\/strong><\/li><\/ul><h2>Na\u010dini okvare pri preskusu z vro\u010dim vtiskom<\/h2><p>Za pravilno razlago rezultatov standarda ASTM F1921 je bistveno razumevanje na\u010dinov lo\u010devanja tesnil. Razli\u010dna obna\u0161anja pri okvari ka\u017eejo na razli\u010dne te\u017eave z materialom ali postopkom.<\/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=\"Na\u010dini okvare pri preskusu z vro\u010dim vtiskom 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\">Odlepljiva nalepka<\/h3><p class=\"elementor-image-box-description\"><p style=\"text-align: left\">Lo\u010ditev poteka na stiku med obema povr\u0161inama.<br><b>Ozna\u010duje: <\/b>Slaba vezava na stiku ali nezadostna toplota\/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=\"Na\u010dini okvare pri preskusu z vro\u010dim vtiskom 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\">Kohezivni piling<\/h3><p class=\"elementor-image-box-description\"><p style=\"text-align: left\">Okvara se pojavi v enem od polimernih slojev.<br><b>Ozna\u010duje:<\/b> Mo\u010dna vez med povr\u0161inama; sam material se po\u0161koduje.<\/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=\"Na\u010dini okvare pri preskusu z vro\u010dim vtiskom 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\">Delaminacija<\/h3><p class=\"elementor-image-box-description\"><p style=\"text-align: left\">Razmik med sloji ve\u010dslojne strukture. <br><b>Ozna\u010duje:<\/b> \u0160ibka vez med plastmi v laminiranih materialih.<\/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=\"Na\u010dini okvare pri preskusu z vro\u010dim vtiskom 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\">Prekinitev zaradi materiala<\/h3><p class=\"elementor-image-box-description\"><p style=\"text-align: left\">Film se oddaljuje od obmo\u010dja tjulnjev<br><b>Ozna\u010duje:<\/b> Tesnilo je trdnej\u0161e od podlage.<\/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=\"Na\u010dini okvare pri preskusu z vro\u010dim vtiskom 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\">Prekinitev na daljavo<\/h3><p class=\"elementor-image-box-description\"><p style=\"text-align: left\">Prekinitev nastane na mestu, ki je oddaljeno od tesnila.<br><b>Ozna\u010duje:<\/b> Tesnilo je precej mo\u010dnej\u0161e od samega materiala.<\/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=\"Na\u010dini okvare pri preskusu z vro\u010dim vtiskom 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\">Raztezek materiala<\/h3><p class=\"elementor-image-box-description\"><p style=\"text-align: left\">Nezape\u010dateni material se pred pretrganjem znatno raztegne.<br><b>Ozna\u010duje:<\/b> Visoka duktilnost in pro\u017enost folije.<\/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=\"Na\u010dini okvare pri preskusu z vro\u010dim vtiskom 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\">Lupina z raztegljivostjo<\/h3><p class=\"elementor-image-box-description\"><p style=\"text-align: left\">Lu\u0161\u010denje, ki ga spremlja znatno raztezanje nezatesnjenega materiala.<br><b>Ozna\u010duje:<\/b> Kombinacija odpovedi lepila in duktilnosti materiala.<\/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>Izdelava krivulje \u00bbhot tack\u00ab za optimizacijo procesa<\/h2><p>A <strong>krivulja toplotne oprijemljivosti<\/strong> na grafu je prikazana odvisnost trdnosti tesnila od temperature. To pomaga ugotoviti:<\/p><ul><li>Za\u010detna temperatura tesnila (SIT)<\/li><li>Okno z optimalnim tesnjenjem<\/li><li>Najve\u010dja toplotna oprijemljivost<\/li><\/ul><p>Ti podatki in\u017eenirjem omogo\u010dajo, da <strong>natan\u010dno prilagodite parametre tesnjenja za dosledno u\u010dinkovitost pakiranja<\/strong>.<\/p><h2>Pogosta vpra\u0161anja o standardu ASTM F1921<\/h2><ol><li><strong> Kaj je glavni namen standarda ASTM F1921?<\/strong><br \/>Ocenjuje <strong>trdnost vro\u010dega spoja termoplasti\u010dnih tesnil takoj po tesnjenju<\/strong>, s \u010dimer se zagotovi zanesljivost pakiranja med proizvodnjo.<\/li><li><strong> V \u010dem se standard ASTM F1921 razlikuje od standarda ASTM F88?<\/strong><br \/><a href=\"https:\/\/store.astm.org\/f1921_f1921m-12r23.html\" target=\"_blank\" rel=\"noopener nofollow\">ASTM F1921<\/a> ukrepi <strong>trdnost vro\u010dega zatesnjevanja<\/strong>, medtem ko standard ASTM F88 meri <strong>trdnost hladnega tesnila<\/strong> po ohladitvi.<\/li><li><strong> Kateri industrijski sektorji uporabljajo preskuse z vro\u010dim lepljenjem?<\/strong><br \/>Industrije \u017eivil, farmacevtske industrije, industrije medicinskih pripomo\u010dkov in industrije pro\u017enih embala\u017e se v veliki meri zana\u0161ajo na ta preskus.<\/li><li><strong> Kak\u0161na je razlika med metodo A in metodo B?<\/strong><br \/>Metoda A meri mo\u010d v odvisnosti od \u010dasa; metoda B zabele\u017ei najve\u010djo silo po dolo\u010denem \u010dasovnem zamiku.<\/li><li><strong> Zakaj je toplotna oprijemljivost pomembna v postopkih FFS?<\/strong><br \/>Ker tesnila pred ohlajanjem izpostavljena stresu, lahko nezadostna toplotna oprijemljivost povzro\u010di <strong>okvara tesnila med pakiranjem<\/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 in preskusna metoda za vro\u010do oprijemljivost Standard ASTM F1921 opredeljuje laboratorijsko metodo za merjenje trdnosti toplotnih zatesnitev takoj po njihovem nastanku, preden se material ohladi na sobno temperaturo. Ta lastnost \u2013 znana kot trdnost vro\u010dega lepljenja \u2013 je klju\u010dnega pomena v okoljih za visokohitrostno pakiranje, zlasti v procesih oblikovanja, polnjenja in zapiranja (FFS). Preskusna metoda za vro\u010de lepljenje simulira dejanske pogoje zapiranja s [\u2026]<\/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\/sl\/wp-json\/wp\/v2\/standard\/1261","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.packtests.com\/sl\/wp-json\/wp\/v2\/standard"}],"about":[{"href":"https:\/\/www.packtests.com\/sl\/wp-json\/wp\/v2\/types\/standard"}],"version-history":[{"count":5,"href":"https:\/\/www.packtests.com\/sl\/wp-json\/wp\/v2\/standard\/1261\/revisions"}],"predecessor-version":[{"id":1297,"href":"https:\/\/www.packtests.com\/sl\/wp-json\/wp\/v2\/standard\/1261\/revisions\/1297"}],"wp:attachment":[{"href":"https:\/\/www.packtests.com\/sl\/wp-json\/wp\/v2\/media?parent=1261"}],"wp:term":[{"taxonomy":"standard-category","embeddable":true,"href":"https:\/\/www.packtests.com\/sl\/wp-json\/wp\/v2\/standard-category?post=1261"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}