B\u011bhem v\u00fdroby f\u00f3lie doch\u00e1z\u00ed v r\u00e1mci proces\u016f, jako je extruze a orientace, k 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. Norma ASTM D2732 umo\u017e\u0148uje:<\/p>\n D\u00edky tomu je norma ASTM D2732 velmi d\u016fle\u017eit\u00e1 v odv\u011btv\u00edch, kde rozm\u011brov\u00e1 stabilita p\u0159\u00edmo ovliv\u0148uje kvalitu v\u00fdrobk\u016f, jako jsou obalov\u00e9 a zdravotnick\u00e9 materi\u00e1ly.<\/p>\n Na str\u00e1nk\u00e1ch metoda zkou\u0161ky smr\u0161\u0165ov\u00e1n\u00ed<\/strong> Zkou\u0161ka popsan\u00e1 v norm\u011b ASTM D2732 hodnot\u00ed, jak se f\u00f3lie smr\u0161\u0165uje p\u0159i pono\u0159en\u00ed do zah\u0159\u00e1t\u00e9ho tekut\u00e9ho m\u00e9dia. Tato zkou\u0161ka zaji\u0161\u0165uje bez vn\u011bj\u0161\u00edho zaji\u0161t\u011bn\u00ed<\/strong>, co\u017e umo\u017e\u0148uje p\u0159irozen\u00e9 smr\u0161\u0165ov\u00e1n\u00ed.<\/p>\n Mezi hlavn\u00ed procesn\u00ed aspekty pat\u0159\u00ed:<\/p>\n Test vyu\u017e\u00edv\u00e1 l\u00e1zn\u011b s regulovanou teplotou<\/strong>, \u010d\u00edm\u017e se zajist\u00ed rovnom\u011brn\u00fd p\u0159enos tepla. Po zah\u0159\u00e1t\u00ed se vzorky rychle ochlad\u00ed a zm\u011b\u0159\u00ed se, aby se stanovila zm\u011bna rozm\u011br\u016f.<\/p>\n Profesion\u00e1ln\u00ed p\u0159\u00edstroj na m\u011b\u0159en\u00ed smr\u0161\u0165ov\u00e1n\u00ed f\u00f3lie<\/strong> zaji\u0161\u0165uje opakovatelnost a p\u0159esnost prost\u0159ednictv\u00edm \u0159\u00edzen\u00ed kl\u00ed\u010dov\u00fdch prom\u011bnn\u00fdch:<\/p>\n Nap\u0159\u00edklad FST-01 Tester smr\u0161\u0165ov\u00e1n\u00ed bez f\u00f3lie<\/strong> Spole\u010dnost Cell Instruments nab\u00edz\u00ed:<\/p>\n Tento typ syst\u00e9mu omezuje vliv obsluhy a zaji\u0161\u0165uje soulad s po\u017eadavky normy ASTM D2732, zejm\u00e9na v prost\u0159ed\u00edch kontroly kvality s vysokou pr\u016fchodnost\u00ed.<\/p>\n D\u016fle\u017eit\u00e9:<\/strong> Vyhn\u011bte se p\u0159edeh\u0159\u00edv\u00e1n\u00ed nebo roztahov\u00e1n\u00ed vzorku, proto\u017ee by to mohlo zkreslit v\u00fdsledky.<\/p>\n Procento smr\u0161t\u011bn\u00ed se vypo\u010d\u00edt\u00e1 podle vzorce:<\/p>\n Smr\u0161t\u011bn\u00ed (%) = (L_o \u2013 L_f) \/ L_o \u00d7 100\\text{Smr\u0161t\u011bn\u00ed (\\%)} = \\frac{L_o \u2013 L_f}{L_o} \\times 100<\/span>Smr\u0161t\u011bn\u00ed (%)<\/span><\/span>=<\/span><\/span>L<\/span>o<\/span><\/span>\u200b<\/span><\/span><\/span><\/span>L<\/span>o<\/span><\/span>\u200b<\/span><\/span>\u2212<\/span>L<\/span>f<\/span><\/span>\u200b<\/span><\/span><\/span><\/span><\/span>\u200b<\/span><\/span><\/span><\/span><\/span>\u00d7<\/span><\/span>100<\/span><\/span><\/span><\/span><\/span><\/p>\n Kde:<\/p>\n Testov\u00e1n\u00ed p\u0159i r\u016fzn\u00fdch teplot\u00e1ch v\u00e1m umo\u017e\u0148uje zmapovat k\u0159ivka smr\u0161\u0165ov\u00e1n\u00ed<\/strong>, co\u017e m\u00e1 z\u00e1sadn\u00ed v\u00fdznam pro v\u00fdb\u011br materi\u00e1lu a optimalizaci procesu.<\/p>\n P\u0159i v\u00fdb\u011bru p\u0159\u00edstroj na m\u011b\u0159en\u00ed smr\u0161\u0165ov\u00e1n\u00ed f\u00f3lie<\/strong><\/a>, zva\u017ete:<\/p>\n Na str\u00e1nk\u00e1ch Cell Instruments FST-01<\/strong> vynik\u00e1 t\u00edm, \u017ee:<\/p>\n D\u00edky tomu je vhodn\u00fd jak pro v\u00fdzkum a v\u00fdvoj, tak pro b\u011b\u017enou kontrolu kvality.<\/p>\n Vyhodno\u0165te vlastnosti sv\u00e9 f\u00f3lie pomoc\u00ed spolehliv\u00e9 zku\u0161ebn\u00ed metody pro m\u011b\u0159en\u00ed smr\u0161\u0165ov\u00e1n\u00ed podle normy ASTM D2732. Pomoc\u00ed p\u0159esn\u00e9ho p\u0159\u00edstroje na m\u011b\u0159en\u00ed smr\u0161\u0165ov\u00e1n\u00ed f\u00f3li\u00ed, jako je model FST-01, m\u016f\u017eete p\u0159esn\u011b m\u011b\u0159it smr\u0161\u0165ov\u00e1n\u00ed za kontrolovan\u00fdch teplotn\u00edch podm\u00ednek, \u010d\u00edm\u017e zajist\u00edte st\u00e1lou kvalitu v\u00fdrobk\u016f a soulad s normami. Zlep\u0161ete v\u00fdb\u011br materi\u00e1l\u016f, sni\u017ete v\u00fdrobn\u00ed rizika a z\u00edskejte jistotu p\u0159i pou\u017eit\u00ed obalov\u00fdch nebo pr\u016fmyslov\u00fdch f\u00f3li\u00ed d\u00edky opakovateln\u00fdm zkou\u0161k\u00e1m zalo\u017een\u00fdm na norm\u00e1ch.<\/p>\n 1. Jak\u00e9 materi\u00e1ly lze testovat podle normy ASTM D2732? 2. Pro\u010d je nekontrolovan\u00e9 smr\u0161\u0165ov\u00e1n\u00ed d\u016fle\u017eit\u00e9? 3. Kolik teplot by se m\u011blo otestovat? 4. \u010c\u00edm jsou zp\u016fsobeny rozd\u00edly ve v\u00fdsledc\u00edch m\u011b\u0159en\u00ed smr\u0161t\u011bn\u00ed?\n
Metoda zkou\u0161ky smr\u0161\u0165ov\u00e1n\u00ed a p\u0159\u00edstroj pro zkou\u0161en\u00ed smr\u0161\u0165ov\u00e1n\u00ed f\u00f3lie<\/h2>\n
Z\u00e1kladn\u00ed principy metody zkou\u0161ky smr\u0161\u0165ov\u00e1n\u00ed<\/h3>\n
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\u00daloha p\u0159\u00edstroje na m\u011b\u0159en\u00ed smr\u0161\u0165ov\u00e1n\u00ed f\u00f3li\u00ed<\/h3>\n
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Podrobn\u00fd p\u0159ehled postupu podle normy ASTM D2732<\/h2>\n
P\u0159\u00edprava vzorku<\/h3>\n
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Proces testov\u00e1n\u00ed<\/h3>\n
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V\u00fdpo\u010det a interpretace smr\u0161t\u011bn\u00ed<\/h2>\n
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Post\u0159ehy k tlumo\u010den\u00ed<\/h3>\n
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V\u00fdb\u011br spr\u00e1vn\u00e9ho p\u0159\u00edstroje pro m\u011b\u0159en\u00ed smr\u0161\u0165ov\u00e1n\u00ed f\u00f3lie<\/h2>\n
![\"ASTM](\"https:\/\/www.qualitester.com\/wp-content\/uploads\/2026\/04\/ASTM-D2732-Film-Shrinkage-Test-Method-Tester-300x300.webp\")
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Nej\u010dast\u011bj\u0161\u00ed dotazy<\/h2>\n
\nPlastov\u00e9 f\u00f3lie a desky o tlou\u0161\u0165ce a\u017e 0,76 mm, v\u010detn\u011b PE, PET, PVC a v\u00edcevrstv\u00fdch lamin\u00e1t\u016f.<\/p>\n
\nOdr\u00e1\u017e\u00ed vlastnosti tohoto materi\u00e1lu skute\u010dn\u00e1 tepeln\u00e1 odezva<\/strong>, bez vn\u011bj\u0161\u00edch mechanick\u00fdch vliv\u016f.<\/p>\n
\nTestov\u00e1n\u00ed p\u0159i r\u016fzn\u00fdch teplot\u00e1ch pom\u00e1h\u00e1 ur\u010dit \u00fapln\u00fd profil smr\u0161\u0165ov\u00e1n\u00ed<\/strong> materi\u00e1lu.<\/p>\n
\nMezi tyto faktory pat\u0159\u00ed orientace f\u00f3lie, tlou\u0161\u0165ka, rychlost oh\u0159evu a rozlo\u017een\u00ed vnit\u0159n\u00edho nap\u011bt\u00ed<\/strong>.<\/p>\n