{"id":6737,"date":"2025-07-09T10:52:25","date_gmt":"2025-07-09T02:52:25","guid":{"rendered":"https:\/\/www.qualitester.com\/?page_id=6737"},"modified":"2025-07-09T10:56:51","modified_gmt":"2025-07-09T02:56:51","slug":"astm-f1921","status":"publish","type":"page","link":"https:\/\/www.qualitester.com\/sk\/standards\/astm-f1921\/","title":{"rendered":"ASTM F1921"},"content":{"rendered":"<h1 style=\"padding-left: 40px; text-align: center;\">ASTM D1921<br \/>\n<small>Testovanie za hor\u00faca<\/small><\/h1>\n<p>V modernom balen\u00ed, najm\u00e4 pri vysokor\u00fdchlostn\u00fdch aplik\u00e1ci\u00e1ch typu form-fill-seal (FFS), je zabezpe\u010denie pevnosti termoplastick\u00fdch f\u00f3li\u00ed pri hor\u00facom zvaren\u00ed k\u013e\u00fa\u010dov\u00e9 pre zabr\u00e1nenie poruch\u00e1m zvaru po\u010das manipul\u00e1cie. Sk\u00fa\u0161obn\u00e1 met\u00f3da ASTM F1921 poskytuje \u0161tandardizovan\u00fd postup na meranie pevnosti tepeln\u00fdch zvarov pred ich ochladen\u00edm. T\u00e1to pr\u00edru\u010dka vysvet\u013euje, ako vykona\u0165 sk\u00fa\u0161ku tepelnej pri\u013enavosti pod\u013ea normy ASTM F1921 a ako pr\u00edstroje, ako je tester tepelnej pri\u013enavosti od spolo\u010dnosti Cell Instruments, podporuj\u00fa konzistentn\u00e9 a spo\u013eahliv\u00e9 testovanie.<\/p>\n<hr \/>\n<h2>Porozumenie norme ASTM F1921: \u00da\u010del a v\u00fdznam<\/h2>\n<p>ASTM F1921 je v\u0161eobecne uzn\u00e1van\u00e1 norma vyvinut\u00e1 organiz\u00e1ciou ASTM International na stanovenie pevnosti zvaru za tepla u termoplastick\u00fdch f\u00f3li\u00ed pou\u017e\u00edvan\u00fdch v oblasti flexibiln\u00fdch obalov. V procesoch formovania, plnenia a zv\u00e1rania s\u00fa zvary \u010dasto nam\u00e1han\u00e9 e\u0161te v teplom stave. Slab\u00fd zvar za tepla sa m\u00f4\u017ee pretrhn\u00fa\u0165, \u010do m\u00f4\u017ee vies\u0165 k strate produktu, po\u0161kodeniu obalu alebo kontamin\u00e1cii.<\/p>\n<p>Tento test je nevyhnutn\u00fd pre in\u017einierov v oblasti balenia, v\u00fdrobcov f\u00f3li\u00ed a t\u00edmy kontroly kvality, aby:<\/p>\n<ul>\n<li>Vyhodnoti\u0165 a porovna\u0165 v\u00fdkon filmu<\/li>\n<li>Optimalizova\u0165 podmienky tesnenia<\/li>\n<li>Zabezpe\u010dte konzistentnos\u0165 procesov a integritu v\u00fdrobkov<\/li>\n<\/ul>\n<hr \/>\n<h2>Vysvetlenie sk\u00fa\u0161ky pri\u013enavosti za tepla a pevnosti pri\u013enavosti za tepla<\/h2>\n<p data-start=\"1619\" data-end=\"1887\">Str\u00e1nka <strong data-start=\"1623\" data-end=\"1640\">sk\u00fa\u0161ka lepivosti za tepla<\/strong> meria maxim\u00e1lnu silu potrebn\u00fa na roztrhnutie tepeln\u00e9ho zvaru, k\u00fdm je e\u0161te hor\u00faci. T\u00e1to vlastnos\u0165, zn\u00e1ma ako <strong data-start=\"1750\" data-end=\"1771\">pevnos\u0165 pri\u013enavosti za tepla<\/strong>, odr\u00e1\u017ea schopnos\u0165 materi\u00e1lu dr\u017ea\u0165 pohromade bezprostredne po zape\u010daten\u00ed \u2013 e\u0161te pred \u00faplnou kry\u0161taliz\u00e1ciou alebo ochladen\u00edm.<\/p>\n<p data-start=\"1889\" data-end=\"1936\">V r\u00e1mci tejto oblasti existuj\u00fa dva pr\u00edstupy k testovaniu <a href=\"https:\/\/store.astm.org\/f1921-98.html\" target=\"_blank\" rel=\"noopener nofollow\">ASTM F1921<\/a>:<\/p>\n<ul>\n<li data-start=\"1939\" data-end=\"2050\"><strong data-start=\"1939\" data-end=\"1965\">Met\u00f3da A (pevn\u00e9 oneskorenie)<\/strong>: Predt\u00fdm, ako sa svorky oddelia od uzavretej vzorky, uplynie \u010das oneskorenia stanoven\u00fd v\u00fdrobcom.<\/li>\n<li data-start=\"2053\" data-end=\"2160\"><strong data-start=\"2053\" data-end=\"2082\">Met\u00f3da B (premenn\u00e9 oneskorenie)<\/strong>: Vyu\u017e\u00edva u\u017e\u00edvate\u013esky definovan\u00e9 oneskorenia, \u010d\u00edm poskytuje v\u00e4\u010d\u0161iu flexibilitu pri pr\u00e1ci s r\u00f4znymi materi\u00e1lmi.<\/li>\n<\/ul>\n<hr \/>\n<h2>Postup testovania k\u013e\u00fa\u010dov pod\u013ea normy ASTM F1921<\/h2>\n<p data-start=\"2214\" data-end=\"2266\">Proces testovania pozost\u00e1va z nasleduj\u00facich krokov:<\/p>\n<ol>\n<li data-start=\"2271\" data-end=\"2297\"><strong data-start=\"2271\" data-end=\"2295\">Pr\u00edprava vzorky<\/strong>\n<ul>\n<li>\u0160\u00edrka: 15 mm, 25 mm alebo 1 palec<\/li>\n<li>D\u013a\u017eka: 25\u201335 cm<\/li>\n<li>Smer: Vzd\u013a\u017eny alebo prie\u010dny smer (mus\u00ed by\u0165 zdokumentovan\u00fd)<\/li>\n<li>Najmenej 3\u20135 vzoriek na ka\u017ed\u00fa podmienku<\/li>\n<\/ul>\n<\/li>\n<li data-start=\"2477\" data-end=\"2498\"><strong data-start=\"2477\" data-end=\"2496\">Proces tesnenia<\/strong>\n<ul>\n<li>Vyhrievan\u00e9 \u010de\u013euste vyv\u00edjaj\u00fa tlak na dva prekr\u00fdvaj\u00face sa p\u00e1sy f\u00f3lie<\/li>\n<li>Typick\u00e9 doby zdr\u017eania:<\/li>\n<li>F\u00f3lie s hr\u00fabkou \u226425 \u03bcm: 0,5 s<\/li>\n<li>F\u00f3lie s hr\u00fabkou 25\u201364 \u03bcm: 1,0 s<\/li>\n<li>Tlak: 15\u201330 N\/cm\u00b2<\/li>\n<li>Teplota: Za\u010d\u00edna na po\u010diato\u010dnej teplote utesnenia a zvy\u0161uje sa o 5\u201310 \u00b0C pri ka\u017edom teste<\/li>\n<\/ul>\n<\/li>\n<li data-start=\"2775\" data-end=\"2805\"><strong data-start=\"2775\" data-end=\"2803\">Oddelenie a meranie<\/strong>\n<ul>\n<li>Po zape\u010daten\u00ed sa \u010de\u013euste otvoria a \u00fachytky automaticky roztiahnu pe\u010da\u0165 kon\u0161tantnou r\u00fdchlos\u0165ou<\/li>\n<li>Stroj zaznamen\u00e1va <strong data-start=\"2939\" data-end=\"2978\">sila potrebn\u00e1 na oddelenie tesnenia<\/strong> (pevnos\u0165 pri hor\u00facom lepen\u00ed)<\/li>\n<\/ul>\n<\/li>\n<li data-start=\"3005\" data-end=\"3026\"><strong data-start=\"3005\" data-end=\"3024\">Zber \u00fadajov<\/strong>\n<ul>\n<li>Pri ka\u017edej teplote sa vygeneruje krivka tepelnej pri\u013enavosti<\/li>\n<li>Sp\u00f4soby zlyhania (odlupovanie, delamin\u00e1cia, natiahnutie, roztrhnutie) sa vizu\u00e1lne kontroluj\u00fa a dokumentuj\u00fa<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<div class=\"ast-oembed-container\" style=\"height: 100%;\"><iframe title=\"\u010co je to tester pri\u013enavosti za tepla | ASTM F1921 | Tester pri\u013enavosti za tepla a odolnosti proti odlupovaniu\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/BrWEqIbLUgI?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/div>\n<hr \/>\n<h2>Porozumenie krivk\u00e1m \u201ehot tack\u201c<\/h2>\n<p data-start=\"3219\" data-end=\"3342\">A <strong data-start=\"3221\" data-end=\"3239\">krivka tepelnej pri\u013enavosti<\/strong> je grafick\u00e9 zn\u00e1zornenie pevnosti tesnenia v ur\u010ditom teplotnom rozsahu. Tieto krivky pom\u00e1haj\u00fa ur\u010di\u0165:<\/p>\n<ul>\n<li data-start=\"3345\" data-end=\"3375\">Optim\u00e1lne teploty tesnenia<\/li>\n<li data-start=\"3378\" data-end=\"3398\">V\u00fdvoj v\u00fdkonnosti<\/li>\n<li data-start=\"3401\" data-end=\"3449\">Obmedzenia materi\u00e1lu pri vysok\u00fdch alebo n\u00edzkych teplot\u00e1ch<\/li>\n<\/ul>\n<p data-start=\"3451\" data-end=\"3610\">Spr\u00e1vna anal\u00fdza krivky m\u00f4\u017ee pom\u00f4c\u0165 in\u017einierom v oblasti balenia pri v\u00fdbere vhodn\u00fdch materi\u00e1lov a pri nastaven\u00ed strojov s cie\u013eom zn\u00ed\u017ei\u0165 po\u010det por\u00fach vo v\u00fdrobe.<\/p>\n<hr \/>\n<h2 data-start=\"3451\" data-end=\"3610\">Be\u017en\u00e9 ru\u0161iv\u00e9 vplyvy a poruchy tesnen\u00ed<\/h2>\n<p>Ru\u0161enia, ako napr\u00edklad <strong data-start=\"3683\" data-end=\"3699\">delamin\u00e1cia<\/strong>, <strong data-start=\"3701\" data-end=\"3722\">ne\u00fapln\u00e1 f\u00fazia<\/strong>, alebo <strong data-start=\"3727\" data-end=\"3747\">pren\u00e1\u0161anie povlaku<\/strong> m\u00f4\u017ee skresli\u0165 v\u00fdsledky. Norma ASTM F1921 kladie d\u00f4raz na zdokumentovanie sp\u00f4sobu zlyhania ka\u017ed\u00e9ho vzorku, aby sa zabezpe\u010dila presn\u00e1 interpret\u00e1cia vlastnost\u00ed pri hor\u00facom lepen\u00ed.<\/p>\n<hr \/>\n<h2>Odpor\u00fa\u010dan\u00e9 vybavenie: <a href=\"https:\/\/www.qualitester.com\/sk\/\">Mobiln\u00e9 n\u00e1stroje<\/a> Hot Tack Tester<\/h2>\n<p data-start=\"3964\" data-end=\"4158\"><a href=\"https:\/\/www.qualitester.com\/sk\/produkt-2\/heat-seal-material-film-hot-tack-property-test\/\"><img fetchpriority=\"high\" decoding=\"async\" class=\"alignright wp-image-6746 size-medium\" src=\"https:\/\/www.qualitester.com\/wp-content\/uploads\/2025\/07\/HTT-25.07.08-300x300.webp\" alt=\"ASTM F1921\" width=\"300\" height=\"300\" srcset=\"https:\/\/www.qualitester.com\/wp-content\/uploads\/2025\/07\/HTT-25.07.08-300x300.webp 300w, https:\/\/www.qualitester.com\/wp-content\/uploads\/2025\/07\/HTT-25.07.08-150x150.webp 150w, https:\/\/www.qualitester.com\/wp-content\/uploads\/2025\/07\/HTT-25.07.08-12x12.webp 12w, https:\/\/www.qualitester.com\/wp-content\/uploads\/2025\/07\/HTT-25.07.08-100x100.webp 100w, https:\/\/www.qualitester.com\/wp-content\/uploads\/2025\/07\/HTT-25.07.08.webp 600w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a>Aby bolo mo\u017en\u00e9 vykon\u00e1va\u0165 presn\u00e9 a opakovate\u013en\u00e9 <strong data-start=\"3998\" data-end=\"4012\">ASTM F1921<\/strong> V oblasti testovania pon\u00faka spolo\u010dnos\u0165 Cell Instruments plne automatizovan\u00e9 <strong data-start=\"4064\" data-end=\"4083\">tester hor\u00facich lepidiel<\/strong> navrhnut\u00e9 tak, aby sp\u013a\u0148ali a prekra\u010dovali \u0161tandardn\u00e9 \u0161pecifik\u00e1cie. Medzi k\u013e\u00fa\u010dov\u00e9 vlastnosti patria:<\/p>\n<ul>\n<li data-start=\"4162\" data-end=\"4243\">Dve vyhrievan\u00e9 \u010de\u013euste s presn\u00fdm nastaven\u00edm <strong data-start=\"4200\" data-end=\"4241\">teplota, doba p\u00f4sobenia a tlak<\/strong><\/li>\n<li data-start=\"4246\" data-end=\"4314\">Automatizovan\u00fd cyklus tesnenia a \u0165ahania s riaden\u00edm v re\u00e1lnom \u010dase <strong data-start=\"4291\" data-end=\"4312\">meranie sily<\/strong><\/li>\n<li data-start=\"4317\" data-end=\"4400\">Pou\u017e\u00edvate\u013esky pr\u00edvetiv\u00e9 rozhranie s programovate\u013en\u00fdmi re\u017eimami oneskorenia pre <strong data-start=\"4375\" data-end=\"4398\">met\u00f3da A aj B<\/strong><\/li>\n<li data-start=\"4403\" data-end=\"4481\">Vytvorenie <strong data-start=\"4417\" data-end=\"4436\">krivky tepelnej pri\u013enavosti<\/strong> a \u0161tatistick\u00e9 \u00fadaje na \u00fa\u010dely zabezpe\u010denia kvality<\/li>\n<\/ul>\n<p data-start=\"4483\" data-end=\"4624\">V\u010faka vysokej presnosti a reprodukovate\u013enosti je tento pr\u00edstroj ide\u00e1lny na <strong data-start=\"4552\" data-end=\"4574\">v\u00fdrobcovia filmov<\/strong>, <strong data-start=\"4576\" data-end=\"4593\">v\u00fdskum a v\u00fdvoj v oblasti balenia<\/strong>a <strong data-start=\"4599\" data-end=\"4623\">laborat\u00f3ri\u00e1 kontroly kvality<\/strong>.<\/p>\n<hr \/>\n<h2 data-start=\"4483\" data-end=\"4624\">Osved\u010den\u00e9 postupy pre presn\u00e9 testovanie pri vysokej teplote<\/h2>\n<ul>\n<li data-start=\"4683\" data-end=\"4759\">Filmy v\u017edy skontrolujte, \u010di neobsahuj\u00fa vady, ako s\u00fa g\u00e9lov\u00e9 \u0161kvrny alebo z\u00e1rezy \u2013 po\u0161koden\u00e9 vzorky vyra\u010fte<\/li>\n<li data-start=\"4762\" data-end=\"4818\">Zabezpe\u010dte, aby boli podmienky tesnenia vo v\u0161etk\u00fdch opakovan\u00fdch meraniach rovnak\u00e9<\/li>\n<li data-start=\"4821\" data-end=\"4886\">V spr\u00e1vach jasne ozna\u010dte smer tesnenia a rozmery vzorky<\/li>\n<li data-start=\"4889\" data-end=\"4956\">Na v\u00fdpo\u010det priemeru pou\u017eite aspo\u0148 tri opakovan\u00e9 merania pre ka\u017ed\u00fd teplotn\u00fd bod<\/li>\n<li data-start=\"4959\" data-end=\"5025\">Vyhnite sa pas\u00edvnym chyb\u00e1m \u2013 ru\u010dne skontrolujte sp\u00f4soby zlyhania v ka\u017edej vzorke<\/li>\n<\/ul>\n<hr \/>\n<h2>Z\u00e1ver<\/h2>\n<p data-start=\"5048\" data-end=\"5504\">Norma ASTM F1921 stanovuje komplexn\u00fa a opakovate\u013en\u00fa metodiku na posudzovanie <strong data-start=\"5125\" data-end=\"5146\">pevnos\u0165 pri\u013enavosti za tepla<\/strong> v termoplastick\u00fdch obalov\u00fdch f\u00f3li\u00e1ch. Dodr\u017eiavan\u00edm tejto normy m\u00f4\u017eu odborn\u00edci na kontrolu kvality zabezpe\u010di\u0165 odolnos\u0165 obalov pri vysokor\u00fdchlostnom spracovan\u00ed a manipul\u00e1cii. Vyu\u017eit\u00edm presn\u00fdch zariaden\u00ed, ako s\u00fa <strong data-start=\"5347\" data-end=\"5384\">Cell Instruments\u2019 <a href=\"https:\/\/www.qualitester.com\/sk\/produkt-2\/hot-tack-tester-htt-02\/\">tester hor\u00facich lepidiel<\/a><\/strong> \u010falej zvy\u0161uje konzistentnos\u0165 testovania, \u010d\u00edm u\u013eah\u010duje v\u00fdvoj spo\u013eahliv\u00fdch a vysoko v\u00fdkonn\u00fdch rie\u0161en\u00ed v oblasti flexibiln\u00fdch obalov.<\/p>","protected":false},"excerpt":{"rendered":"<p>ASTM D1921 Hot Tack Testing In modern packaging, especially for high-speed form-fill-seal (FFS) applications, ensuring the hot tack strength of thermoplastic films is vital to prevent seal failures during handling. The ASTM F1921 test method provides a standardized procedure for measuring the strength of heat seals before they have cooled. This guide explores how to &hellip;<\/p>\n<p class=\"read-more\"> <a class=\"\" href=\"https:\/\/www.qualitester.com\/sk\/standards\/astm-f1921\/\"> <span class=\"screen-reader-text\">ASTM F1921<\/span> \u010c\u00edtajte viac \"<\/a><\/p>","protected":false},"author":3,"featured_media":0,"parent":4948,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"site-sidebar-layout":"default","site-content-layout":"default","ast-global-header-display":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","footnotes":""},"class_list":["post-6737","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.qualitester.com\/sk\/wp-json\/wp\/v2\/pages\/6737","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.qualitester.com\/sk\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.qualitester.com\/sk\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.qualitester.com\/sk\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/www.qualitester.com\/sk\/wp-json\/wp\/v2\/comments?post=6737"}],"version-history":[{"count":0,"href":"https:\/\/www.qualitester.com\/sk\/wp-json\/wp\/v2\/pages\/6737\/revisions"}],"up":[{"embeddable":true,"href":"https:\/\/www.qualitester.com\/sk\/wp-json\/wp\/v2\/pages\/4948"}],"wp:attachment":[{"href":"https:\/\/www.qualitester.com\/sk\/wp-json\/wp\/v2\/media?parent=6737"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}