{"id":3268,"date":"2026-04-22T08:44:19","date_gmt":"2026-04-22T08:44:19","guid":{"rendered":"https:\/\/www.materialstests.com\/?post_type=application&#038;p=3268"},"modified":"2026-04-23T02:13:48","modified_gmt":"2026-04-23T02:13:48","slug":"astm-d2732","status":"publish","type":"application","link":"https:\/\/www.materialstests.com\/cs\/application\/astm-d2732.html","title":{"rendered":"ASTM D2732"},"content":{"rendered":"<h2 class=\"wp-block-heading\">Porozum\u011bn\u00ed norm\u011b ASTM D2732 a jej\u00ed \u00faloze p\u0159i v\u00fdrob\u011b filmu<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>ASTM D2732<\/strong> definuje standardizovanou metodu m\u011b\u0159en\u00ed <em>neomezen\u00e9 line\u00e1rn\u00ed tepeln\u00e9 smr\u0161\u0165ov\u00e1n\u00ed<\/em> plastov\u00fdch f\u00f3li\u00ed a f\u00f3li\u00ed o tlou\u0161\u0165ce \u22640,76 mm. Tato metoda hraje z\u00e1sadn\u00ed roli p\u0159i hodnocen\u00ed chov\u00e1n\u00ed f\u00f3li\u00ed p\u0159i tepeln\u00e9m nam\u00e1h\u00e1n\u00ed - co\u017e je z\u00e1sadn\u00ed parametr v obalov\u00fdch, l\u00e9ka\u0159sk\u00fdch a pr\u016fmyslov\u00fdch aplikac\u00edch.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">P\u0159i v\u00fdrob\u011b f\u00f3lie v\u00fdrobci \u010dasto zav\u00e1d\u011bj\u00ed vnit\u0159n\u00ed pnut\u00ed prost\u0159ednictv\u00edm natahovac\u00edch nebo orienta\u010dn\u00edch proces\u016f. P\u0159i vystaven\u00ed zv\u00fd\u0161en\u00fdm teplot\u00e1m se tato nap\u011bt\u00ed uvol\u0148uj\u00ed a zp\u016fsobuj\u00ed rozm\u011brov\u00e9 smr\u0161t\u011bn\u00ed. Norma ASTM D2732 poskytuje kontrolovan\u00fd r\u00e1mec pro p\u0159esnou kvantifikaci tohoto chov\u00e1n\u00ed.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Tato data umo\u017e\u0148uj\u00ed konstrukt\u00e9r\u016fm a t\u00fdm\u016fm kontroly kvality p\u0159edpov\u00eddat v\u00fdkon v re\u00e1ln\u00fdch tepeln\u00fdch podm\u00ednk\u00e1ch a zajistit, aby materi\u00e1ly spl\u0148ovaly po\u017eadavky na pou\u017eit\u00ed bez deformac\u00ed, poruch nebo probl\u00e9m\u016f s t\u011bsn\u011bn\u00edm.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Testov\u00e1n\u00ed smr\u0161t\u011bn\u00ed a testov\u00e1n\u00ed smr\u0161\u0165ovac\u00edch f\u00f3li\u00ed<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Zkou\u0161ka smr\u0161t\u011bn\u00ed<\/strong> podle normy ASTM D2732 zahrnuje pono\u0159en\u00ed vzork\u016f f\u00f3lie do zah\u0159\u00e1t\u00e9ho kapaln\u00e9ho m\u00e9dia za \u00fa\u010delem pozorov\u00e1n\u00ed rozm\u011brov\u00fdch zm\u011bn. Spolehliv\u00fd <strong>tester smr\u0161\u0165ovac\u00edch f\u00f3li\u00ed<\/strong> zaji\u0161\u0165uje konzistentn\u00ed kontrolu teploty a opakovateln\u00e9 v\u00fdsledky.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Mezi hlavn\u00ed z\u00e1sady testov\u00e1n\u00ed pat\u0159\u00ed:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Stav bez omezen\u00ed:<\/strong> Vzorek se mus\u00ed voln\u011b smr\u0161\u0165ovat bez p\u016fsoben\u00ed vn\u011bj\u0161\u00edch sil.<\/li>\n\n\n\n<li><strong>Tepeln\u00e1 rovnov\u00e1ha:<\/strong> Vzorek mus\u00ed b\u011bhem pono\u0159en\u00ed dos\u00e1hnout stabiln\u00ed teploty.<\/li>\n\n\n\n<li><strong>Sm\u011brov\u00e9 m\u011b\u0159en\u00ed:<\/strong> Smr\u0161t\u011bn\u00ed se zaznamen\u00e1v\u00e1 ve sm\u011bru stroje (MD) i v p\u0159\u00ed\u010dn\u00e9m sm\u011bru (TD).<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Specializovan\u00fd n\u00e1stroj, jako je nap\u0159. <strong>FST-01 Tester smr\u0161\u0165ov\u00e1n\u00ed bez f\u00f3lie<\/strong> v\u00fdrazn\u011b zlep\u0161uje p\u0159esnost testov\u00e1n\u00ed. Nab\u00edz\u00ed:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>PID regulace teploty (\u00b10,3 \u00b0C)<\/strong> pro stabiln\u00ed vyt\u00e1p\u011bn\u00ed<\/li>\n\n\n\n<li>Rovnom\u011brn\u00e9 kapaln\u00e9 m\u00e9dium pro eliminaci teplotn\u00edch gradient\u016f<\/li>\n\n\n\n<li>Voln\u011b smr\u0161titeln\u00e9 dr\u017e\u00e1ky zabra\u0148uj\u00edc\u00ed mechanick\u00e9mu omezen\u00ed<\/li>\n\n\n\n<li>P\u0159esn\u00e9 na\u010dasov\u00e1n\u00ed pro konzistentn\u00ed doby zdr\u017een\u00ed<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Tyto vlastnosti p\u0159\u00edmo odpov\u00eddaj\u00ed po\u017eadavk\u016fm normy ASTM D2732 a sni\u017euj\u00ed variabilitu zp\u016fsobenou obsluhou.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Zku\u0161ebn\u00ed postup podle normy ASTM D2732<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Pro zaji\u0161t\u011bn\u00ed shody a opakovatelnosti se laborato\u0159e \u0159\u00edd\u00ed strukturovan\u00fdm postupem:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">P\u0159\u00edprava vzorku<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u0158ezan\u00e9 vzorky <strong>100 mm \u00d7 100 mm<\/strong><\/li>\n\n\n\n<li>P\u0159ipravte alespo\u0148 dva vzorky pro ka\u017edou teplotu testu<\/li>\n\n\n\n<li>V p\u0159\u00edpad\u011b pot\u0159eby ozna\u010dte orientaci (MD\/TD)<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Kroky testov\u00e1n\u00ed<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Vlo\u017ete vzorek do voln\u011b smr\u0161titeln\u00e9ho dr\u017e\u00e1ku.<\/li>\n\n\n\n<li>Z\u00e1znam teploty l\u00e1zn\u011b p\u0159ed pono\u0159en\u00edm<\/li>\n\n\n\n<li>Pono\u0159te vzorek p\u0159ibli\u017en\u011b na <strong>10 sekund<\/strong><\/li>\n\n\n\n<li>Vyjm\u011bte a ihned ochla\u010fte v tekutin\u011b o pokojov\u00e9 teplot\u011b.<\/li>\n\n\n\n<li>M\u011b\u0159en\u00ed kone\u010dn\u00fdch rozm\u011br\u016f po stabilizaci<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">D\u016fle\u017eit\u00e9 pozn\u00e1mky<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Vyhn\u011bte se p\u0159edeh\u0159\u00edv\u00e1n\u00ed vzorku p\u0159ed pono\u0159en\u00edm do vody<\/li>\n\n\n\n<li>Zabra\u0148te natahov\u00e1n\u00ed vzorku p\u0159i manipulaci<\/li>\n\n\n\n<li>V p\u0159\u00edpad\u011b pot\u0159eby upravte dobu pono\u0159en\u00ed pro siln\u011bj\u0161\u00ed materi\u00e1ly.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">V\u00fdpo\u010det v\u00fdsledk\u016f smr\u0161t\u011bn\u00ed<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Norma ASTM D2732 vyjad\u0159uje smr\u0161t\u011bn\u00ed jako procento zm\u011bny rozm\u011bru:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><math xmlns=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"><semantics><mrow><mtext>Smr\u0161t\u011bn\u00ed (%)<\/mtext><mo>=<\/mo><mfrac><mrow><msub><mi>L<\/mi><mn>0<\/mn><\/msub><mo>\u2212<\/mo><msub><mi>L<\/mi><mi>f<\/mi><\/msub><\/mrow><msub><mi>L<\/mi><mn>0<\/mn><\/msub><\/mfrac><mo>\u00d7<\/mo><mn>100<\/mn><\/mrow><annotation encoding=\"application\/x-tex\">\\text{Shrinkage (\\%)} = \\frac{L_0 - L_f}{L_0} \\kr\u00e1t 100<\/annotation><\/semantics><\/math>Smr\u0161t\u011bn\u00ed (%)=L0L0-Lf\u00d7100<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Kde:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>L\u2080<\/strong> = P\u016fvodn\u00ed d\u00e9lka (obvykle 100 mm)<\/li>\n\n\n\n<li><strong>L_f<\/strong> = Kone\u010dn\u00e1 d\u00e9lka po smr\u0161t\u011bn\u00ed<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Tento v\u00fdpo\u010det poskytuje jasnou kvantitativn\u00ed m\u00edru chov\u00e1n\u00ed materi\u00e1lu p\u0159i tepeln\u00e9m nam\u00e1h\u00e1n\u00ed.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">V\u00fdznam normy ASTM D2732 p\u0159i kontrole kvality<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Norma ASTM D2732 p\u0159in\u00e1\u0161\u00ed u\u017eite\u010dn\u00e9 informace o:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Konzistence zpracov\u00e1n\u00ed:<\/strong> zji\u0161\u0165ov\u00e1n\u00ed rozd\u00edl\u016f v orientaci f\u00f3lie a v\u00fdrobn\u00edch podm\u00ednk\u00e1ch.<\/li>\n\n\n\n<li><strong>Tepeln\u00e1 stabilita:<\/strong> Identifikace prahov\u00fdch hodnot smr\u0161t\u011bn\u00ed spojen\u00fdch s p\u0159echody polymer\u016f<\/li>\n\n\n\n<li><strong>V\u00fdkonnost p\u0159i kone\u010dn\u00e9m pou\u017eit\u00ed:<\/strong> Zaji\u0161t\u011bn\u00ed neporu\u0161enosti obalu, zejm\u00e9na u aplikac\u00ed smr\u0161\u0165ovan\u00fdch teplem.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Nadm\u011brn\u00e9 smr\u0161\u0165ov\u00e1n\u00ed m\u016f\u017ee nap\u0159\u00edklad v\u00e9st k:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Zkreslen\u00fd vzhled obalu<\/li>\n\n\n\n<li>Selh\u00e1n\u00ed t\u011bsn\u011bn\u00ed u zdravotnick\u00fdch vak\u016f<\/li>\n\n\n\n<li>Mechanick\u00e9 nam\u00e1h\u00e1n\u00ed ve vrstven\u00fdch konstrukc\u00edch<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Testov\u00e1n\u00edm p\u0159i v\u00edce teplot\u00e1ch mohou in\u017een\u00fd\u0159i zjistit. <strong>k\u0159ivka profilu smr\u0161t\u011bn\u00ed<\/strong>, co\u017e umo\u017e\u0148uje p\u0159esn\u00fd v\u00fdb\u011br materi\u00e1lu a optimalizaci procesu.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Pro\u010d zvolit pokro\u010dil\u00e1 testovac\u00ed \u0159e\u0161en\u00ed jako FST-01?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">V praktick\u00e9m laboratorn\u00edm prost\u0159ed\u00ed doch\u00e1z\u00ed p\u0159i manu\u00e1ln\u00edch metod\u00e1ch \u010dasto k nesrovnalostem. Na str\u00e1nk\u00e1ch <strong>FST-01 <a href=\"https:\/\/www.materialstests.com\/cs\/products\/fst-01-film-free-shrink-tester.html\/\" target=\"_blank\" data-type=\"products\" data-id=\"3069\" rel=\"noreferrer noopener\">Tester smr\u0161\u0165ov\u00e1n\u00ed bez f\u00f3lie<\/a><\/strong> \u0159e\u0161\u00ed tyto probl\u00e9my prost\u0159ednictv\u00edm:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Opakovateln\u00e9 podm\u00ednky oh\u0159evu<\/strong> nap\u0159\u00ed\u010d d\u00e1vkami<\/li>\n\n\n\n<li><strong>Sn\u00ed\u017een\u00ed po\u010dtu lidsk\u00fdch chyb<\/strong> p\u0159i na\u010dasov\u00e1n\u00ed a manipulaci<\/li>\n\n\n\n<li><strong>Zv\u00fd\u0161en\u00e1 bezpe\u010dnost<\/strong> s uzav\u0159en\u00fdmi syst\u00e9my olejov\u00e9 l\u00e1zn\u011b<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Pro v\u00fdrobce obal\u016f, l\u00e9\u010div a elektroniky zaji\u0161\u0165uje toto p\u0159\u00edstrojov\u00e9 vybaven\u00ed shodu s normou ASTM D2732 a z\u00e1rove\u0148 zvy\u0161uje v\u00fdkonnost a spolehlivost.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Aplikace testov\u00e1n\u00ed podle normy ASTM D2732<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Pr\u016fmyslov\u00e1 odv\u011btv\u00ed se spol\u00e9haj\u00ed na normu ASTM D2732 pro:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Pru\u017en\u00e9 obalov\u00e9 f\u00f3lie (PET, PE, PVC)<\/li>\n\n\n\n<li>L\u00e9ka\u0159sk\u00e9 a farmaceutick\u00e9 steriln\u00ed bari\u00e9ry<\/li>\n\n\n\n<li>Teplem smr\u0161titeln\u00e9 obj\u00edmky a trubky<\/li>\n\n\n\n<li>Pr\u016fmyslov\u00e9 stretch a balic\u00ed f\u00f3lie<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">V ka\u017ed\u00e9m p\u0159\u00edpad\u011b chov\u00e1n\u00ed p\u0159i smr\u0161\u0165ov\u00e1n\u00ed p\u0159\u00edmo ovliv\u0148uje funk\u010dnost a vizu\u00e1ln\u00ed kvalitu v\u00fdrobku.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Nej\u010dast\u011bj\u0161\u00ed dotazy<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>1. Co m\u011b\u0159\u00ed norma ASTM D2732?<\/strong><br>M\u011b\u0159\u00ed neomezen\u00e9 line\u00e1rn\u00ed tepeln\u00e9 smr\u0161t\u011bn\u00ed plastov\u00fdch f\u00f3li\u00ed p\u0159i vystaven\u00ed \u0159\u00edzen\u00fdm tepeln\u00fdm podm\u00ednk\u00e1m.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>2. Pro\u010d je testov\u00e1n\u00ed smr\u0161t\u011bn\u00ed u obalov\u00fdch f\u00f3li\u00ed d\u016fle\u017eit\u00e9?<\/strong><br>Zaji\u0161\u0165uje, \u017ee si f\u00f3lie zachov\u00e1vaj\u00ed rozm\u011brovou stabilitu a t\u011bsnic\u00ed celistvost b\u011bhem tepeln\u00e9ho p\u016fsoben\u00ed p\u0159i zpracov\u00e1n\u00ed nebo kone\u010dn\u00e9m pou\u017eit\u00ed.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>3. Jak\u00e1 je standardn\u00ed velikost vzorku podle normy ASTM D2732?<\/strong><br>Standardn\u00ed velikost je 100 \u00d7 100 mm pro p\u0159esn\u00e9 a konzistentn\u00ed m\u011b\u0159en\u00ed.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>4. Jak dlouho by m\u011bl b\u00fdt vzorek pono\u0159en?<\/strong><br>Obvykle 10 sekund, ale siln\u011bj\u0161\u00ed materi\u00e1ly mohou vy\u017eadovat ov\u011b\u0159en\u00ed dostate\u010dn\u00e9 tepeln\u00e9 rovnov\u00e1hy.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>5. Jak\u00e9 vybaven\u00ed je doporu\u010deno pro <a href=\"https:\/\/store.astm.org\/d2732-14r25.html\" target=\"_blank\" rel=\"noreferrer noopener\">ASTM D2732<\/a> testov\u00e1n\u00ed?<\/strong><br>Speci\u00e1ln\u00ed tester smr\u0161\u0165ovac\u00edch f\u00f3li\u00ed, jako je FST-01, zaji\u0161\u0165uje p\u0159esnou kontrolu teploty a opakovateln\u00e9 v\u00fdsledky.<\/p>","protected":false},"excerpt":{"rendered":"<p>Norma ASTM D2732 definuje standardizovanou metodu pro hodnocen\u00ed tepeln\u00e9ho smr\u0161t\u011bn\u00ed plastov\u00fdch f\u00f3li\u00ed bez omezen\u00ed pono\u0159en\u00edm vzork\u016f do zah\u0159\u00e1t\u00e9ho m\u00e9dia a m\u011b\u0159en\u00edm rozm\u011brov\u00fdch zm\u011bn.<\/p>","protected":false},"featured_media":3270,"parent":0,"template":"","meta":{"_acf_changed":false},"standard":[1012],"class_list":["post-3268","application","type-application","status-publish","has-post-thumbnail","hentry","standard-astm"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.materialstests.com\/cs\/wp-json\/wp\/v2\/application\/3268","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.materialstests.com\/cs\/wp-json\/wp\/v2\/application"}],"about":[{"href":"https:\/\/www.materialstests.com\/cs\/wp-json\/wp\/v2\/types\/application"}],"version-history":[{"count":2,"href":"https:\/\/www.materialstests.com\/cs\/wp-json\/wp\/v2\/application\/3268\/revisions"}],"predecessor-version":[{"id":3271,"href":"https:\/\/www.materialstests.com\/cs\/wp-json\/wp\/v2\/application\/3268\/revisions\/3271"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.materialstests.com\/cs\/wp-json\/wp\/v2\/media\/3270"}],"wp:attachment":[{"href":"https:\/\/www.materialstests.com\/cs\/wp-json\/wp\/v2\/media?parent=3268"}],"wp:term":[{"taxonomy":"standard","embeddable":true,"href":"https:\/\/www.materialstests.com\/cs\/wp-json\/wp\/v2\/standard?post=3268"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}