{"id":1258,"date":"2026-04-22T08:59:36","date_gmt":"2026-04-22T08:59:36","guid":{"rendered":"https:\/\/www.packtests.com\/?post_type=standard&#038;p=1258"},"modified":"2026-06-04T05:41:35","modified_gmt":"2026-06-04T05:41:35","slug":"astm-d2732","status":"publish","type":"standard","link":"https:\/\/www.packtests.com\/cs\/standard\/astm-d2732\/","title":{"rendered":"ASTM D2732"},"content":{"rendered":"<h2 class=\"wp-block-heading\">Vysv\u011btlen\u00ed normy ASTM D2732 v oblasti zkou\u0161en\u00ed plastov\u00fdch f\u00f3li\u00ed<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>ASTM D2732<\/strong> stanovuje standardizovan\u00fd p\u0159\u00edstup k hodnocen\u00ed <em>neomezen\u00e1 line\u00e1rn\u00ed tepeln\u00e1 smr\u0161tivost<\/em> plastov\u00fdch f\u00f3li\u00ed a pl\u00e1t\u016f. Tato metoda se zam\u011b\u0159uje na materi\u00e1ly o tlou\u0161\u0165ce <strong>0,76 mm nebo m\u00e9n\u011b<\/strong>, d\u00edky \u010demu\u017e je tento materi\u00e1l mimo\u0159\u00e1dn\u011b vhodn\u00fd pro flexibiln\u00ed obaly, l\u00e9ka\u0159sk\u00e9 f\u00f3lie a pr\u016fmyslov\u00e9 aplikace s pou\u017eit\u00edm smr\u0161\u0165ovac\u00edch f\u00f3li\u00ed.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">P\u0159i v\u00fdrob\u011b f\u00f3lie doch\u00e1z\u00ed v r\u00e1mci proces\u016f, jako je extruze nebo protahov\u00e1n\u00ed, k <strong>vnit\u0159n\u00ed nap\u011bt\u00ed<\/strong>. P\u0159i p\u016fsoben\u00ed tepla se tato nap\u011bt\u00ed uvoln\u00ed, co\u017e vede ke smr\u0161t\u011bn\u00ed materi\u00e1lu. Norma ASTM D2732 toto chov\u00e1n\u00ed kvantifikuje a pom\u00e1h\u00e1 tak in\u017een\u00fdr\u016fm a odborn\u00edk\u016fm na kontrolu kvality p\u0159edv\u00eddat chov\u00e1n\u00ed materi\u00e1lu za teplotn\u00edch podm\u00ednek.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Norma se nezab\u00fdv\u00e1 smr\u0161t\u011bn\u00edm zp\u016fsoben\u00fdm \u00fabytkem rozpou\u0161t\u011bdla, \u010d\u00edm\u017e zaji\u0161\u0165uje, \u017ee v\u00fdsledky p\u0159esn\u011b odr\u00e1\u017eej\u00ed tepeln\u00e9 \u00fa\u010dinky.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Metoda zkou\u0161ky smr\u0161\u0165ov\u00e1n\u00ed: Principy a pr\u016fmyslov\u00fd v\u00fdznam<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Na str\u00e1nk\u00e1ch <strong>metoda zkou\u0161ky smr\u0161\u0165ov\u00e1n\u00ed<\/strong> Norma ASTM D2732 hodnot\u00ed, o kolik se f\u00f3lie smr\u0161t\u00ed p\u0159i vystaven\u00ed kontrolovan\u00fdm teplot\u00e1m. To poskytuje z\u00e1sadn\u00ed informace o:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Stabilita materi\u00e1lu p\u0159i vystaven\u00ed p\u016fsoben\u00ed tepla<\/strong><\/li>\n\n\n\n<li><strong>Nezm\u011bn\u011bnost obalu p\u0159i tepeln\u00e9m zpracov\u00e1n\u00ed<\/strong><\/li>\n\n\n\n<li><strong>Shoda mezi jednotliv\u00fdmi v\u00fdrobn\u00edmi \u0161ar\u017eemi<\/strong><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Teplota hraje rozhoduj\u00edc\u00ed roli. Smr\u0161t\u011bn\u00ed \u010dasto souvis\u00ed s:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Sm\u011br zpracov\u00e1n\u00ed (pod\u00e9ln\u00fd vs. p\u0159\u00ed\u010dn\u00fd sm\u011br)<\/li>\n\n\n\n<li>Struktura polymeru a krystalinita<\/li>\n\n\n\n<li>Body f\u00e1zov\u00e9ho p\u0159echodu v z\u00e1kladn\u00edch prysky\u0159ic\u00edch<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Proveden\u00edm test\u016f p\u0159i r\u016fzn\u00fdch teplot\u00e1ch mohou u\u017eivatel\u00e9 zjistit, jak <strong>k\u0159ivka profilu smr\u0161t\u011bn\u00ed<\/strong>, co\u017e je nezbytn\u00e9 pro n\u00e1vrh v\u00fdrobk\u016f a optimalizaci proces\u016f.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Postup zkou\u0161ky smr\u0161\u0165ov\u00e1n\u00ed bez f\u00f3lie: postup krok za krokem<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Na str\u00e1nk\u00e1ch <strong>Postup zkou\u0161ky smr\u0161\u0165ov\u00e1n\u00ed bez f\u00f3lie<\/strong> zaji\u0161\u0165uje, \u017ee ke smr\u0161\u0165ov\u00e1n\u00ed doch\u00e1z\u00ed bez vn\u011bj\u0161\u00edch omezen\u00ed, co\u017e umo\u017e\u0148uje p\u0159esn\u00e9 m\u011b\u0159en\u00ed vlastn\u00edho chov\u00e1n\u00ed materi\u00e1lu.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Mezi kl\u00ed\u010dov\u00e9 kroky pat\u0159\u00ed:<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>P\u0159\u00edprava vzork\u016f<\/strong><br>Vyst\u0159ihn\u011bte vzorky na <strong>100 mm \u00d7 100 mm<\/strong>. Pro ka\u017ed\u00fd teplotn\u00ed bod pou\u017eijte alespo\u0148 dva vzorky.<\/li>\n\n\n\n<li><strong>Ozna\u010den\u00ed a orientace<\/strong><br>Ur\u010dete sm\u011br pod\u00e9ln\u00fd (MD) a p\u0159\u00ed\u010dn\u00fd (TD), abyste zachytili sm\u011brov\u00e9 smr\u0161t\u011bn\u00ed.<\/li>\n\n\n\n<li><strong>Um\u00edst\u011bn\u00ed do dr\u017e\u00e1ku Free Shrink<\/strong><br>Zajist\u011bte, aby vzorek z\u016fstal zcela voln\u00fd a z\u00e1rove\u0148 se zabr\u00e1nilo jeho plav\u00e1n\u00ed v topn\u00e9m m\u00e9diu.<\/li>\n\n\n\n<li><strong>Zaznamen\u00e1v\u00e1n\u00ed teploty<\/strong><br>P\u0159ed pono\u0159en\u00edm zm\u011b\u0159te a zaznamenejte teplotu vody ve van\u011b.<\/li>\n\n\n\n<li><strong>Pono\u0159ovac\u00ed proces<\/strong><br>Vzorek pono\u0159te na dobu <strong>~10 sekund<\/strong> nebo dokud nedojde k dosa\u017een\u00ed tepeln\u00e9 rovnov\u00e1hy.<br><em>Vyhn\u011bte se vystaven\u00ed p\u0159edb\u011b\u017en\u00e9mu zah\u0159\u00edv\u00e1n\u00ed<\/em>, proto\u017ee by to mohlo v\u00e9st k chyb\u00e1m.<\/li>\n\n\n\n<li><strong>Chladic\u00ed stupe\u0148<\/strong><br>Okam\u017eit\u011b p\u0159eneste do m\u00e9dia o pokojov\u00e9 teplot\u011b za \u00fa\u010delem stabilizace.<\/li>\n\n\n\n<li><strong>M\u011b\u0159en\u00ed<\/strong><br>Po vychladnut\u00ed zm\u011b\u0159te kone\u010dn\u00e9 rozm\u011bry ve sm\u011bru MD i TD.<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>D\u016fle\u017eit\u00e9:<\/strong> P\u0159i manipulaci se vzorkem se vyhn\u011bte jeho prota\u017een\u00ed nebo deformaci.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">V\u00fdpo\u010det smr\u0161t\u011bn\u00ed a interpretace dat<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Procento smr\u0161t\u011bn\u00ed se vypo\u010d\u00edt\u00e1 takto:<math xmlns=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" display=\"block\"><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{Smr\u0161t\u011bn\u00ed (\\%)} = \\frac{L_0 \u2013 L_f}{L_0} \\times 100<\/annotation><\/semantics><\/math>Smr\u0161t\u011bn\u00ed (%) = L0\u200bL0\u200b\u2212Lf\u200b\u200b\u00d7100<\/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{Smr\u0161t\u011bn\u00ed (\\%)} = \\frac{L_0 \u2013 L_f}{L_0} \\times 100<\/annotation><\/semantics><\/math>Smr\u0161t\u011bn\u00ed (%) = L0\u200bL0\u200b\u2212Lf\u200b\u200b\u00d7100<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Kde:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><em>L\u2080<\/em> = Po\u010d\u00e1te\u010dn\u00ed d\u00e9lka (obvykle 100 mm)<\/li>\n\n\n\n<li><em>L_f<\/em> = Kone\u010dn\u00e1 d\u00e9lka po smr\u0161t\u011bn\u00ed<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Tipy k tlumo\u010den\u00ed:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Vy\u0161\u0161\u00ed hodnoty znamenaj\u00ed v\u011bt\u0161\u00ed uvoln\u011bn\u00ed vnit\u0159n\u00edho nap\u011bt\u00ed<\/li>\n\n\n\n<li>Rozd\u00edly mezi MD a TD odhaluj\u00ed orienta\u010dn\u00ed efekty<\/li>\n\n\n\n<li>Testov\u00e1n\u00ed p\u0159i r\u016fzn\u00fdch teplot\u00e1ch pom\u00e1h\u00e1 stanovit rozsahy zpracovatelnosti<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">P\u0159\u00edstroj pro m\u011b\u0159en\u00ed tepeln\u00e9ho smr\u0161t\u011bn\u00ed: V\u00fdb\u011br a optimalizace za\u0159\u00edzen\u00ed<\/h2>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-7387b849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-constrained wp-block-column-is-layout-constrained\">\n<figure class=\"wp-block-image size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"600\" height=\"600\" src=\"https:\/\/www.packtests.com\/wp-content\/uploads\/2026\/04\/ASTM-D2732-Shrinkage-Test-Method-Film-Free-Shrink-Test.webp\" alt=\"ASTM D2732 \u2013 Zku\u0161ebn\u00ed metoda pro m\u011b\u0159en\u00ed smr\u0161t\u011bn\u00ed a zkou\u0161ka smr\u0161t\u011bn\u00ed bez f\u00f3lie\" class=\"wp-image-1259\" title=\"\" srcset=\"https:\/\/www.packtests.com\/wp-content\/uploads\/2026\/04\/ASTM-D2732-Shrinkage-Test-Method-Film-Free-Shrink-Test.webp 600w, https:\/\/www.packtests.com\/wp-content\/uploads\/2026\/04\/ASTM-D2732-Shrinkage-Test-Method-Film-Free-Shrink-Test-300x300.webp 300w, https:\/\/www.packtests.com\/wp-content\/uploads\/2026\/04\/ASTM-D2732-Shrinkage-Test-Method-Film-Free-Shrink-Test-150x150.webp 150w, https:\/\/www.packtests.com\/wp-content\/uploads\/2026\/04\/ASTM-D2732-Shrinkage-Test-Method-Film-Free-Shrink-Test-12x12.webp 12w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\">\n<p class=\"wp-block-paragraph\">A <strong>p\u0159\u00edstroj na m\u011b\u0159en\u00ed tepeln\u00e9ho smr\u0161t\u011bn\u00ed<\/strong> je nezbytn\u00e9 pro prov\u00e1d\u011bn\u00ed zkou\u0161ky podle normy ASTM D2732 s opakovatelnost\u00ed a p\u0159esnost\u00ed. Modern\u00ed syst\u00e9my zaji\u0161\u0165uj\u00ed:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Stabiln\u00ed regulace teploty<\/li>\n\n\n\n<li>Rovnom\u011brn\u00e9 rozlo\u017een\u00ed tepla<\/li>\n\n\n\n<li>P\u0159esn\u00e9 \u010dasov\u00e1n\u00ed a podm\u00ednky pono\u0159en\u00ed<\/li>\n<\/ul>\n<\/div>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Na str\u00e1nk\u00e1ch <strong>FST-01 \u2013 Tester smr\u0161\u0165ov\u00e1n\u00ed bez f\u00f3lie<\/strong> Produkt od spole\u010dnosti Cell Instruments je navr\u017een speci\u00e1ln\u011b pro tento standard. Nab\u00edz\u00ed:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>P\u0159esnost m\u011b\u0159en\u00ed teploty \u00b10,3 \u00b0C<\/strong>, \u010d\u00edm\u017e zaji\u0161\u0165uje spolehliv\u00e9 v\u00fdsledky<\/li>\n\n\n\n<li><strong>Rovnom\u011brn\u00e9 oh\u0159ev kapaliny<\/strong>, \u010d\u00edm\u017e se zabr\u00e1n\u00ed m\u00edstn\u00edmu p\u0159eh\u0159\u00edv\u00e1n\u00ed<\/li>\n\n\n\n<li><strong>Up\u00ednac\u00ed p\u0159\u00edpravky s voln\u00fdm smr\u0161t\u011bn\u00edm<\/strong>, p\u0159i zachov\u00e1n\u00ed neomezen\u00fdch podm\u00ednek<\/li>\n\n\n\n<li><strong>Automatick\u00e9 \u0159\u00edzen\u00ed \u010dasov\u00e1n\u00ed<\/strong>, zlep\u0161en\u00ed opakovatelnosti<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Toto za\u0159\u00edzen\u00ed umo\u017e\u0148uje laborato\u0159\u00edm simulovat re\u00e1ln\u00e9 podm\u00ednky smr\u0161\u0165ov\u00e1n\u00ed a ov\u011b\u0159it vlastnosti f\u00f3lie je\u0161t\u011b p\u0159ed jej\u00edm nasazen\u00edm do v\u00fdroby.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Praktick\u00e9 vyu\u017eit\u00ed zkou\u0161ek podle normy ASTM D2732<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Norma ASTM D2732 hraje kl\u00ed\u010dovou roli v r\u016fzn\u00fdch odv\u011btv\u00edch, kde chov\u00e1n\u00ed p\u0159i tepeln\u00e9m smr\u0161\u0165ov\u00e1n\u00ed ovliv\u0148uje v\u00fdkonnost:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Flexibiln\u00ed obaly:<\/strong> Zaji\u0161\u0165uje rovnom\u011brn\u00e9 smr\u0161\u0165ov\u00e1n\u00ed f\u00f3li\u00ed bez deformac\u00ed<\/li>\n\n\n\n<li><strong>L\u00e9ka\u0159sk\u00e9 a farmaceutick\u00e9 obaly:<\/strong> Zaji\u0161\u0165uje neporu\u0161enost steriln\u00ed bari\u00e9ry<\/li>\n\n\n\n<li><strong>Tepeln\u011b smr\u0161titeln\u00e9 n\u00e1vleky a trubi\u010dky:<\/strong> Zaji\u0161\u0165uje spr\u00e1vn\u00e9 uchycen\u00ed a izolaci<\/li>\n\n\n\n<li><strong>Pr\u016fmyslov\u00e9 f\u00f3lie:<\/strong> Zaji\u0161\u0165uje stabilitu n\u00e1kladu p\u0159i balen\u00ed palet<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Testov\u00e1n\u00ed umo\u017e\u0148uje v\u00fdrobc\u016fm p\u0159izp\u016fsobit vlastnosti materi\u00e1l\u016f po\u017eadavk\u016fm kone\u010dn\u00e9ho pou\u017eit\u00ed, \u010d\u00edm\u017e se sni\u017euje po\u010det vad a zvy\u0161uje se spolehlivost v\u00fdrobk\u016f.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Zlep\u0161en\u00ed kontroly kvality podle normy ASTM D2732<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">D\u016fsledn\u00e9 dodr\u017eov\u00e1n\u00ed normy ASTM D2732 p\u0159isp\u00edv\u00e1 ke zlep\u0161en\u00ed:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Validace procesu<\/strong> b\u011bhem nat\u00e1\u010den\u00ed filmu<\/li>\n\n\n\n<li><strong>Zaji\u0161t\u011bn\u00ed kvality dodavatel\u016f<\/strong><\/li>\n\n\n\n<li><strong>Anal\u00fdza poruch<\/strong> vad\u00e1ch obal\u016f<\/li>\n\n\n\n<li><strong>Dodr\u017eov\u00e1n\u00ed p\u0159edpis\u016f<\/strong> v citliv\u00fdch odv\u011btv\u00edch<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">D\u00edky za\u010dlen\u011bn\u00ed tohoto testu do b\u011b\u017en\u00fdch postup\u016f kontroly kvality z\u00edsk\u00e1vaj\u00ed spole\u010dnosti <strong>\u0159\u00edzen\u00ed v\u00fdkonu smr\u0161\u0165ov\u00e1n\u00ed na z\u00e1klad\u011b dat<\/strong>, co\u017e m\u00e1 p\u0159\u00edm\u00fd dopad na kvalitu v\u00fdrobk\u016f a spokojenost z\u00e1kazn\u00edk\u016f.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u010casto kladen\u00e9 ot\u00e1zky<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>1. Jak\u00e9 materi\u00e1ly lze testovat podle normy ASTM D2732?<\/strong><br>T\u00fdk\u00e1 se plastov\u00fdch f\u00f3li\u00ed a desek o tlou\u0161\u0165ce a\u017e 0,76 mm, v\u010detn\u011b PE, PET, PVC a v\u00edcevrstv\u00fdch lamin\u00e1t\u016f.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>2. Pro\u010d je nekontrolovan\u00e9 smr\u0161\u0165ov\u00e1n\u00ed d\u016fle\u017eit\u00e9?<\/strong><br>Odr\u00e1\u017e\u00ed p\u0159irozenou reakci materi\u00e1lu na teplo bez p\u016fsoben\u00ed vn\u011bj\u0161\u00edch sil, \u010d\u00edm\u017e poskytuje p\u0159esn\u00e9 \u00fadaje o jeho vlastnostech.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>3. Jak dlouho by m\u011bly b\u00fdt vzorky pono\u0159eny?<\/strong><br>Obvykle 10 sekund, u siln\u011bj\u0161\u00edch nebo nov\u00fdch materi\u00e1l\u016f v\u0161ak m\u016f\u017ee b\u00fdt nutn\u00e9 prov\u00e9st ov\u011b\u0159en\u00ed, aby se zajistilo \u00fapln\u00e9 smr\u0161t\u011bn\u00ed.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>4. Jak\u00fd je rozd\u00edl mezi smr\u0161t\u011bn\u00edm MD a TD?<\/strong><br>Zkratka MD ozna\u010duje sm\u011br pod\u00e9l stroje, zat\u00edmco TD znamen\u00e1 p\u0159\u00ed\u010dn\u00fd sm\u011br. Rozd\u00edly poukazuj\u00ed na vlivy orientace p\u0159i zpracov\u00e1n\u00ed.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>5. M\u016f\u017ee <a href=\"https:\/\/store.astm.org\/d2732-14r25.html\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">ASTM D2732<\/a> p\u0159edpov\u011bd\u011bt skute\u010dn\u00fd v\u00fdkon obalu?<\/strong><br>Ano, v kombinaci s testov\u00e1n\u00edm p\u0159i r\u016fzn\u00fdch teplot\u00e1ch to velmi v\u011brn\u011b simuluje skute\u010dn\u00e9 tepeln\u00e9 podm\u00ednky.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>","protected":false},"excerpt":{"rendered":"<p>Understanding ASTM D2732 in Plastic Film Testing ASTM D2732 defines a standardized approach to evaluate the unrestrained linear thermal shrinkage of plastic films and sheeting. This method focuses on materials with a thickness of 0.76 mm or less, making it highly relevant for flexible packaging, medical films, and industrial shrink applications. During film manufacturing, processes [&hellip;]<\/p>","protected":false},"featured_media":1259,"parent":0,"template":"","meta":{"_acf_changed":false},"standard-category":[64],"class_list":["post-1258","standard","type-standard","status-publish","has-post-thumbnail","hentry","standard-category-astm"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.packtests.com\/cs\/wp-json\/wp\/v2\/standard\/1258","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":1,"href":"https:\/\/www.packtests.com\/cs\/wp-json\/wp\/v2\/standard\/1258\/revisions"}],"predecessor-version":[{"id":1326,"href":"https:\/\/www.packtests.com\/cs\/wp-json\/wp\/v2\/standard\/1258\/revisions\/1326"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.packtests.com\/cs\/wp-json\/wp\/v2\/media\/1259"}],"wp:attachment":[{"href":"https:\/\/www.packtests.com\/cs\/wp-json\/wp\/v2\/media?parent=1258"}],"wp:term":[{"taxonomy":"standard-category","embeddable":true,"href":"https:\/\/www.packtests.com\/cs\/wp-json\/wp\/v2\/standard-category?post=1258"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}