{"id":345,"date":"2025-04-10T06:15:44","date_gmt":"2025-04-10T06:15:44","guid":{"rendered":"https:\/\/www.coefficientfriction.com\/?page_id=345"},"modified":"2025-04-23T03:12:53","modified_gmt":"2025-04-23T03:12:53","slug":"coefficient-of-friction-of-plastic-film","status":"publish","type":"page","link":"https:\/\/www.coefficientfriction.com\/cs\/application\/coefficient-of-friction-of-plastic-film","title":{"rendered":"Plastov\u00e1 f\u00f3lie"},"content":{"rendered":"
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Koeficient t\u0159en\u00ed plastov\u00e9 f\u00f3lie<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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ASTM D1894, ISO 8295 a BS 2782-8: 824A<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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Pochopen\u00ed koeficientu t\u0159en\u00ed plastov\u00e9 f\u00f3lie<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Na str\u00e1nk\u00e1ch sou\u010dinitel t\u0159en\u00ed plastov\u00e9 f\u00f3lie<\/strong> hraje z\u00e1sadn\u00ed roli p\u0159i ur\u010dov\u00e1n\u00ed toho, jak snadno po sob\u011b f\u00f3lie klou\u017eou nebo jak se vz\u00e1jemn\u011b ovliv\u0148uj\u00ed se sou\u010d\u00e1stmi stroje. Pro v\u00fdrobce a odborn\u00edky na zaji\u0161t\u011bn\u00ed kvality v obalov\u00e9m, zdravotnick\u00e9m a potravin\u00e1\u0159sk\u00e9m pr\u016fmyslu je \u0159\u00edzen\u00ed tohoto t\u0159en\u00ed nezbytn\u00e9 pro zaji\u0161t\u011bn\u00ed plynul\u00e9 v\u00fdroby, prevenci naru\u0161en\u00ed balic\u00ed linky a optimalizaci integrity v\u00fdrobk\u016f b\u011bhem skladov\u00e1n\u00ed a p\u0159epravy.<\/p>

V aplikac\u00edch plastov\u00fdch f\u00f3li\u00ed poskytuje koeficient t\u0159en\u00ed (COF) cenn\u00e9 informace o vlastnostech povrchu materi\u00e1lu. Tato jedin\u00e1 vlastnost m\u016f\u017ee ovlivnit kompatibilitu se stroji, schopnost stohov\u00e1n\u00ed, a dokonce i zku\u0161enosti spot\u0159ebitel\u016f.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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Zku\u0161ebn\u00ed normy pro koeficient t\u0159en\u00ed
ASTM D1894, ISO 8295 a BS 2782-8: 824A<\/small><\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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\"ASTM\"<\/a><\/figure>

ASTM D1894 Standardn\u00ed zku\u0161ebn\u00ed metoda pro statick\u00e9 a kinetick\u00e9 koeficienty t\u0159en\u00ed plastov\u00fdch f\u00f3li\u00ed a plech\u016f<\/a><\/h3>

Norma ASTM D1894 uv\u00e1d\u00ed standardn\u00ed zku\u0161ebn\u00ed metodu pro m\u011b\u0159en\u00ed statick\u00e9 i kinetick\u00e9 COF plastov\u00fdch f\u00f3li\u00ed a desek. Podle t\u00e9to normy se s\u00edla pot\u0159ebn\u00e1 k zah\u00e1jen\u00ed a udr\u017een\u00ed pohybu mezi povrchy m\u011b\u0159\u00ed pomoc\u00ed metody san\u00ed a roviny. Zku\u0161ebn\u00ed rychlost je obvykle 150 mm\/min a pou\u017e\u00edvaj\u00ed se normalizovan\u00e9 s\u00e1\u0148ky (200 g \u00b11 g).
Tato metoda je \u0161iroce pou\u017e\u00edv\u00e1na v Severn\u00ed Americe a tvo\u0159\u00ed z\u00e1klad pro hodnocen\u00ed interakc\u00ed mezi f\u00f3li\u00ed a kovem - co\u017e je kritick\u00e9 pro aplikace vertik\u00e1ln\u00edho t\u011bsn\u011bn\u00ed (VFFS).<\/p><\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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\"Norma<\/a><\/figure>

ISO 8295 Plasty - F\u00f3lie a f\u00f3lie - Stanoven\u00ed sou\u010dinitel\u016f t\u0159en\u00ed<\/a><\/h3>

ISO 8295 je mezin\u00e1rodn\u00edm ekvivalentem pro zkou\u0161en\u00ed COF. A\u010dkoli je podobn\u00e1 norm\u011b ASTM D1894, norma ISO 8295 stanov\u00ed zku\u0161ebn\u00ed rychlost 100 mm\/min a poskytuje p\u0159\u00edsn\u011bj\u0161\u00ed tolerance pro podm\u00ednky prost\u0159ed\u00ed, zejm\u00e9na teplotu a vlhkost, kter\u00e9 mohou ovlivnit v\u00fdsledky zkou\u0161ky.
Norma ISO 8295 je \u010dasto citov\u00e1na v glob\u00e1ln\u00edch obalov\u00fdch norm\u00e1ch a b\u011b\u017en\u011b ji pou\u017e\u00edvaj\u00ed nadn\u00e1rodn\u00ed zna\u010dky, kter\u00e9 se sna\u017e\u00ed sjednotit hodnocen\u00ed obalov\u00fdch materi\u00e1l\u016f v r\u016fzn\u00fdch regionech.<\/p><\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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\"\"<\/figure>

BS 2782-8: 824A Metody zkou\u0161en\u00ed plast\u016f. - Stanoven\u00ed sou\u010dinitel\u016f t\u0159en\u00ed plastov\u00fdch f\u00f3li\u00ed<\/h3>

Dal\u0161\u00ed uzn\u00e1vanou metodou pro testov\u00e1n\u00ed COF plastov\u00fdch f\u00f3li\u00ed je britsk\u00e1 norma BS 2782-8: Metoda 824A. Poskytuje pokyny pro konfiguraci p\u0159\u00edstroje, p\u0159\u00edpravu povrchu a interpretaci v\u00fdsledk\u016f. A\u010dkoli je o n\u011bco m\u00e9n\u011b roz\u0161\u00ed\u0159en\u00e1 ne\u017e normy ASTM nebo ISO, z\u016fst\u00e1v\u00e1 ve Velk\u00e9 Brit\u00e1nii a evropsk\u00fdch zku\u0161ebn\u00e1ch relevantn\u00ed.<\/p><\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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Statick\u00fd vs. kinetick\u00fd koeficient t\u0159en\u00ed<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Sou\u010dinitel t\u0159en\u00ed se d\u011bl\u00ed na dva typy:<\/p>