{"id":9312,"date":"2026-02-02T11:24:03","date_gmt":"2026-02-02T03:24:03","guid":{"rendered":"https:\/\/www.packqc.com\/applications\/trouser-tear-test\/"},"modified":"2026-03-16T16:24:19","modified_gmt":"2026-03-16T08:24:19","slug":"trouser-tear-test","status":"publish","type":"applications","link":"https:\/\/www.packqc.com\/cs\/applications\/trouser-tear-test\/","title":{"rendered":"Test trh\u00e1n\u00ed kalhot"},"content":{"rendered":"

The ASTM D1938<\/strong><\/a> zku\u0161ebn\u00ed metoda je z\u00e1kladn\u00edm standardem pro hodnocen\u00ed odolnost proti \u0161\u00ed\u0159en\u00ed trhlin<\/strong> plastov\u00fdch f\u00f3li\u00ed a tenk\u00fdch f\u00f3li\u00ed. B\u011b\u017en\u011b zn\u00e1m\u00e9 jako test roztr\u017een\u00ed kalhot<\/strong>, se tato metoda pou\u017e\u00edv\u00e1 k m\u011b\u0159en\u00ed s\u00edly pot\u0159ebn\u00e9 k \u0161\u00ed\u0159en\u00ed trhliny v plastov\u00fdch materi\u00e1lech, co\u017e poskytuje cenn\u00e9 informace o jejich odolnosti a v\u00fdkonnosti p\u0159i nam\u00e1h\u00e1n\u00ed.<\/p>\n\n\n\n

Tato metoda zahrnuje pou\u017eit\u00ed metoda jednoho odtr\u017een\u00ed<\/strong>, kdy se v materi\u00e1lu vytvo\u0159\u00ed \u0161t\u011brbina a pomoc\u00ed separa\u010dn\u00edho stroje s konstantn\u00ed rychlost\u00ed se m\u011b\u0159\u00ed s\u00edla, kterou se tato \u0161t\u011brbina \u0161\u00ed\u0159\u00ed. Jedn\u00e1 se o kritickou zkou\u0161ku pou\u017e\u00edvanou v r\u016fzn\u00fdch pr\u016fmyslov\u00fdch odv\u011btv\u00edch, jako jsou obaly, potraviny a zdravotnick\u00e9 prost\u0159edky, kde je odolnost proti roztr\u017een\u00ed prvo\u0159ad\u00e1.<\/p>\n\n\n\n

Z\u00e1klady testu roztr\u017een\u00ed kalhot<\/h2>\n\n\n\n

The test roztr\u017een\u00ed kalhot<\/strong> spo\u010d\u00edv\u00e1 v uchopen\u00ed plastov\u00e9 f\u00f3lie nebo tenk\u00e9 f\u00f3lie do dvou svorek s p\u0159edem vy\u0159\u00edznutou \u0161t\u011brbinou uprost\u0159ed materi\u00e1lu. Svorky se od sebe odd\u011bluj\u00ed konstantn\u00ed rychlost\u00ed, co\u017e zp\u016fsobuje \u0161\u00ed\u0159en\u00ed trhliny v materi\u00e1lu. M\u011b\u0159\u00ed se s\u00edla pot\u0159ebn\u00e1 k pokra\u010dov\u00e1n\u00ed trh\u00e1n\u00ed, \u010d\u00edm\u017e se z\u00edsk\u00e1 informace o pevnost plastov\u00fdch f\u00f3li\u00ed v roztr\u017een\u00ed<\/strong>.<\/p>\n\n\n\n

The odolnost proti \u0161\u00ed\u0159en\u00ed trhlin<\/strong> je d\u016fle\u017eit\u00fd pro pochopen\u00ed toho, jak dob\u0159e materi\u00e1l odol\u00e1v\u00e1 roztr\u017een\u00ed, co\u017e m\u016f\u017ee b\u00fdt z\u00e1sadn\u00ed pro jeho pou\u017eit\u00ed v re\u00e1ln\u00fdch aplikac\u00edch, jako jsou ochrann\u00e9 bari\u00e9ry, obaly nebo l\u00e9ka\u0159sk\u00e9 f\u00f3lie.<\/p>\n\n\n\n

Jak funguje test ASTM D1938<\/h2>\n\n\n\n

Postup krok za krokem:<\/strong><\/h3>\n\n\n\n
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  1. P\u0159\u00edprava vzork\u016f<\/strong>: Na zku\u0161ebn\u00edm vzorku se uprost\u0159ed ud\u011bl\u00e1 \u0159ez, kter\u00fd vytvo\u0159\u00ed dv\u011b ramena. Tato ramena jsou sev\u0159ena strojem a vzd\u00e1lenost mezi sev\u0159en\u00edmi je udr\u017eov\u00e1na p\u0159i konstantn\u00ed rychlosti.<\/li>\n\n\n\n
  2. Separace a m\u011b\u0159en\u00ed<\/strong>: Zkou\u0161ka se prov\u00e1d\u00ed kontinu\u00e1ln\u00edm odd\u011blov\u00e1n\u00edm \u00fachyt\u016f a po celou dobu zkou\u0161ky se zaznamen\u00e1v\u00e1 s\u00edla pot\u0159ebn\u00e1 k roz\u0161\u00ed\u0159en\u00ed trhliny.<\/li>\n\n\n\n
  3. V\u00fdsledky test\u016f<\/strong>: \u00dadaje o zat\u00ed\u017een\u00ed v \u010dase generovan\u00e9 b\u011bhem zkou\u0161ky umo\u017e\u0148uj\u00ed obsluze zjistit, zda je materi\u00e1l odoln\u00fd proti zat\u00ed\u017een\u00ed. odolnost proti \u0161\u00ed\u0159en\u00ed trhlin<\/strong>, kter\u00e1 se vypo\u010d\u00edt\u00e1 z nam\u011b\u0159en\u00e9 s\u00edly a vzd\u00e1lenosti mezi sev\u0159en\u00edmi.<\/li>\n<\/ol>\n\n\n\n

    Faktory ovliv\u0148uj\u00edc\u00ed v\u00fdsledky:<\/strong><\/h3>\n\n\n\n