{"id":1425,"date":"2026-07-23T06:12:28","date_gmt":"2026-07-23T06:12:28","guid":{"rendered":"https:\/\/www.packtests.com\/?post_type=standard&#038;p=1425"},"modified":"2026-07-23T06:14:04","modified_gmt":"2026-07-23T06:14:04","slug":"astm-d1894","status":"publish","type":"standard","link":"https:\/\/www.packtests.com\/cs\/standard\/astm-d1894\/","title":{"rendered":"ASTM D1894"},"content":{"rendered":"<p class=\"wp-block-paragraph\">Plastov\u00e9 f\u00f3lie hraj\u00ed v modern\u00edm balen\u00ed kl\u00ed\u010dovou roli, a to od s\u00e1\u010dk\u016f na potraviny a farmaceutick\u00fdch s\u00e1\u010dku a\u017e po pr\u016fmyslov\u00e9 vlo\u017eky a obaly spot\u0159ebn\u00edho zbo\u017e\u00ed. Jednou z nejd\u016fle\u017eit\u011bj\u0161\u00edch povrchov\u00fdch vlastnost\u00ed, kter\u00e9 ovliv\u0148uj\u00ed funk\u010dnost obalu, je <strong>ASTM D1894<\/strong> koeficient t\u0159en\u00ed (COF). Nespr\u00e1vn\u00e1 \u00farove\u0148 t\u0159en\u00ed m\u016f\u017ee v\u00e9st k v\u00fdpadk\u016fm ve v\u00fdrob\u011b, \u0161patn\u00e9 obrobitelnosti, nestabiln\u00edmu nalo\u017een\u00ed palet nebo k neuspokojiv\u00fdm zku\u0161enostem spot\u0159ebitel\u016f.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Tento \u010dl\u00e1nek vysv\u011btluje <strong>ASTM D1894<\/strong> z praktick\u00e9ho in\u017een\u00fdrsk\u00e9ho hlediska, v\u010detn\u011b \u00fa\u010delu <strong>zkou\u0161ka koeficientu t\u0159en\u00ed<\/strong>, z\u00e1sady testov\u00e1n\u00ed, p\u0159\u00edpravu vzork\u016f, interpretaci v\u00fdsledk\u016f a v\u00fdb\u011br vybaven\u00ed. A\u0165 u\u017e jste v\u00fdrobce obal\u016f, technik kontroly kvality, laborant nebo v\u00fdvoj\u00e1\u0159 produkt\u016f, pochopen\u00ed <strong>ASTM D1894<\/strong> pom\u00e1h\u00e1 zajistit st\u00e1lou kvalitu v\u00fdrobk\u016f a efektivn\u00ed v\u00fdrobu.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Pro\u010d je norma ASTM D1894 d\u016fle\u017eit\u00e1<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>ASTM D1894<\/strong> je standardn\u00ed zku\u0161ebn\u00ed metoda pou\u017e\u00edvan\u00e1 ke stanoven\u00ed <strong>statick\u00fd koeficient t\u0159en\u00ed<\/strong> a <strong>kinetick\u00fd koeficient t\u0159en\u00ed<\/strong> z plastov\u00fdch f\u00f3li\u00ed a desek.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Tento test hodnot\u00ed, jak\u00e1 s\u00edla je zapot\u0159eb\u00ed k zah\u00e1jen\u00ed pohybu mezi dv\u011bma st\u00fdkaj\u00edc\u00edch se povrchy a jak\u00e1 s\u00edla je nutn\u00e1 k udr\u017een\u00ed plynul\u00e9ho klouz\u00e1n\u00ed. Tato m\u011b\u0159en\u00ed poskytuj\u00ed cenn\u00e9 informace o kluzn\u00fdch vlastnostech obalov\u00fdch materi\u00e1l\u016f.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">P\u0159i v\u00fdrob\u011b obal\u016f m\u00e1 t\u0159en\u00ed p\u0159\u00edm\u00fd vliv na:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Vysokorychlostn\u00ed operace typu \u201eform-fill-seal\u201c<\/li>\n\n\n\n<li>Za\u0159\u00edzen\u00ed pro automatick\u00e9 ozna\u010dov\u00e1n\u00ed<\/li>\n\n\n\n<li>Syst\u00e9my pro balen\u00ed do karton\u016f a dopravn\u00ed syst\u00e9my<\/li>\n\n\n\n<li>Stabilita stohov\u00e1n\u00ed bal\u00edk\u016f<\/li>\n\n\n\n<li>V\u00fdkon nav\u00edjen\u00ed rol\u00ed<\/li>\n\n\n\n<li>Zku\u0161enosti spot\u0159ebitel\u016f s obsluhou<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Vzhledem k tomu, \u017ee povrchov\u00e9 t\u0159en\u00ed ovliv\u0148uje jak efektivitu v\u00fdroby, tak vlastnosti kone\u010dn\u00e9ho v\u00fdrobku, <strong>testov\u00e1n\u00ed COF obal\u016f<\/strong> se stala b\u011b\u017en\u00fdm postupem kontroly kvality v mnoha odv\u011btv\u00edch.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Porozum\u011bn\u00ed statick\u00e9mu a kinetick\u00e9mu koeficientu t\u0159en\u00ed<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Na str\u00e1nk\u00e1ch <strong>zkou\u0161ka koeficientu t\u0159en\u00ed<\/strong> m\u011b\u0159\u00ed dv\u011b r\u016fzn\u00e1 chov\u00e1n\u00ed t\u0159en\u00ed.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Parametr<\/th><th>Popis<\/th><th>V\u00fdznam<\/th><\/tr><\/thead><tbody><tr><td>Statick\u00fd koeficient t\u0159en\u00ed (COF)<\/td><td>S\u00edla pot\u0159ebn\u00e1 k zah\u00e1jen\u00ed pohybu<\/td><td>Nazna\u010duje po\u010d\u00e1te\u010dn\u00ed sklon k zasek\u00e1v\u00e1n\u00ed nebo zablokov\u00e1n\u00ed<\/td><\/tr><tr><td>Kinetick\u00fd koeficient t\u0159en\u00ed (COF)<\/td><td>S\u00edla pot\u0159ebn\u00e1 k udr\u017een\u00ed pohybu<\/td><td>Odr\u00e1\u017e\u00ed trval\u00fd v\u00fdkon p\u0159i klouz\u00e1n\u00ed<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Vysok\u00fd statick\u00fd koeficient t\u0159en\u00ed (COF) m\u016f\u017ee zp\u016fsobit slepen\u00ed f\u00f3li\u00ed, zat\u00edmco velmi n\u00edzk\u00fd COF m\u016f\u017ee sn\u00ed\u017eit stabilitu stohu. Podobn\u011b i kinetick\u00fd koeficient t\u0159en\u00ed ovliv\u0148uje plynulost pohybu materi\u00e1l\u016f v balic\u00edch stroj\u00edch.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Optim\u00e1ln\u00ed \u00farove\u0148 t\u0159en\u00ed z\u00e1vis\u00ed sp\u00ed\u0161e na konkr\u00e9tn\u00edm pou\u017eit\u00ed ne\u017e na snaze dos\u00e1hnout co nejni\u017e\u0161\u00ed mo\u017en\u00e9 hodnoty.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Princip zkou\u0161ky podle normy ASTM D1894<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Princip <strong>ASTM D1894<\/strong> je to jednoduch\u00e9.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Jeden vzorek se upevn\u00ed na vodorovnou zku\u0161ebn\u00ed plo\u0161inu, zat\u00edmco druh\u00fd vzorek se p\u0159ipevn\u00ed k zat\u00ed\u017een\u00e9mu san\u00edm. San\u011b jsou ta\u017eeny \u0159\u00edzenou rychlost\u00ed pomoc\u00ed zku\u0161ebn\u00edho p\u0159\u00edstroje. B\u011bhem pohybu p\u0159\u00edstroj pr\u016fb\u011b\u017en\u011b m\u011b\u0159\u00ed ta\u017enou s\u00edlu.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Koeficient t\u0159en\u00ed se vypo\u010d\u00edt\u00e1 takto:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>COF = t\u0159ec\u00ed s\u00edla \u00f7 norm\u00e1lov\u00e1 s\u00edla<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Nejv\u011bt\u0161\u00ed s\u00edla pot\u0159ebn\u00e1 k zah\u00e1jen\u00ed pohybu p\u0159edstavuje statick\u00fd koeficient t\u0159en\u00ed, zat\u00edmco pr\u016fm\u011brn\u00e1 s\u00edla b\u011bhem rovnom\u011brn\u00e9ho klouz\u00e1n\u00ed p\u0159edstavuje kinetick\u00fd koeficient t\u0159en\u00ed.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">P\u0159esn\u00e9 \u0159\u00edzen\u00ed rychlosti je z\u00e1sadn\u00ed, proto\u017ee hodnoty t\u0159en\u00ed jsou citliv\u00e9 na rychlost pohybu. Norma ASTM D1894 stanovuje zku\u0161ebn\u00ed rychlost <strong>150 mm\/min<\/strong>, zat\u00edmco norma ISO 8295 stanov\u00ed <strong>100 mm\/min<\/strong>, a proto je nezbytn\u00e9, aby p\u0159\u00edstroj spl\u0148oval po\u017eadavky vybran\u00e9 normy.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Po\u017eadavky na zku\u0161ebn\u00ed vzorky<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Spr\u00e1vn\u00e1 p\u0159\u00edprava vzork\u016f je z\u00e1sadn\u00ed pro z\u00edsk\u00e1n\u00ed spolehliv\u00fdch \u00fadaj\u016f.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Podle normy ASTM D1894:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Vzorek<\/th><th>Typick\u00e1 velikost<\/th><\/tr><\/thead><tbody><tr><td>Rovinn\u00fd vzorek<\/td><td>P\u0159ibli\u017en\u011b 250 \u00d7 130 mm<\/td><\/tr><tr><td>F\u00f3lie p\u0159ipevn\u011bn\u00e1 k san\u00edm<\/td><td>P\u0159ibli\u017en\u011b 120 \u00d7 120 mm<\/td><\/tr><tr><td>Siln\u00fd plech p\u0159ipevn\u011bn\u00fd k san\u00edm<\/td><td>63,5 \u00d7 63,5 mm<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Norma d\u00e1le doporu\u010duje:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Zkou\u0161ka na nejm\u00e9n\u011b p\u011bti vzorc\u00edch<\/li>\n\n\n\n<li>Pou\u017eit\u00ed \u010dist\u00fdch, nezne\u010di\u0161t\u011bn\u00fdch vzork\u016f<\/li>\n\n\n\n<li>Jak zabr\u00e1nit vzniku otisk\u016f prst\u016f na testovac\u00edch ploch\u00e1ch<\/li>\n\n\n\n<li>V\u00fdm\u011bna vzork\u016f po ka\u017ed\u00e9m testu<\/li>\n\n\n\n<li>Zaji\u0161t\u011bn\u00ed st\u00e1l\u00e9ho sm\u011bru pod\u00e9ln\u00e9ho sm\u011bru b\u011bhem zkou\u0161ky<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">I mal\u00e9 mno\u017estv\u00ed prachu nebo oleje m\u016f\u017ee v\u00fdrazn\u011b ovlivnit nam\u011b\u0159en\u00e9 hodnoty t\u0159en\u00ed.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Faktory ovliv\u0148uj\u00edc\u00ed koeficient t\u0159en\u00ed plastov\u00e9 f\u00f3lie<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Na str\u00e1nk\u00e1ch <strong>koeficient t\u0159en\u00ed plastov\u00e9 f\u00f3lie<\/strong> z\u00e1le\u017e\u00ed na mnoha faktorech krom\u011b samotn\u00e9ho materi\u00e1lu.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Mezi b\u011b\u017en\u00e9 ovliv\u0148uj\u00edc\u00ed faktory pat\u0159\u00ed:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">P\u0159\u00edsady do maziv<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Polyethylenov\u00e9 a polypropylenov\u00e9 f\u00f3lie \u010dasto obsahuj\u00ed kluzn\u00e1 aditiva, kter\u00e1 se v pr\u016fb\u011bhu \u010dasu p\u0159esouvaj\u00ed na povrch a m\u011bn\u00ed tak t\u0159ec\u00ed vlastnosti.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Povrchov\u00e1 \u00faprava<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Koronov\u00e1 \u00faprava, plazmov\u00e1 \u00faprava, povlaky a potisk m\u011bn\u00ed povrchovou energii a t\u00edm ovliv\u0148uj\u00ed t\u0159ec\u00ed vlastnosti.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">St\u00e1rnut\u00ed filmu<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Mnoh\u00e1 aditiva se postupn\u011b uvol\u0148uj\u00ed. Z tohoto d\u016fvodu se v\u00fdsledky m\u011b\u0159en\u00ed t\u0159en\u00ed mohou m\u011bnit je\u0161t\u011b n\u011bkolik dn\u00ed \u010di t\u00fddn\u016f po v\u00fdrob\u011b.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Teplota a vlhkost<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Podm\u00ednky prost\u0159ed\u00ed ovliv\u0148uj\u00ed vlastnosti povrchu polymeru a b\u011bhem zkou\u0161ek by m\u011bly b\u00fdt regulov\u00e1ny.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">V\u00fdrobn\u00ed proces<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Na morfologii povrchu maj\u00ed vliv podm\u00ednky extruze, teplota chladic\u00edho v\u00e1lce i rychlost zpracov\u00e1n\u00ed.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Aby bylo mo\u017en\u00e9 prov\u00e1d\u011bt smyslupln\u00e1 srovn\u00e1n\u00ed, m\u011bly by laborato\u0159e dodr\u017eovat jednotn\u00e9 postupy p\u0159\u00edpravy vzork\u016f a zajistit st\u00e1l\u00e9 podm\u00ednky prost\u0159ed\u00ed.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Koeficient t\u0159en\u00ed pap\u00edru ve srovn\u00e1n\u00ed s plastovou f\u00f3li\u00ed<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A\u010dkoli <strong>ASTM D1894<\/strong> zam\u011b\u0159uje se p\u0159edev\u0161\u00edm na plastov\u00e9 f\u00f3lie a plachty, podobn\u00e9 postupy p\u0159i zkou\u0161k\u00e1ch t\u0159en\u00ed jsou v\u0161ak u\u017eite\u010dn\u00e9 i pro hodnocen\u00ed <strong>koeficient t\u0159en\u00ed pap\u00edru<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Mezi oblasti pou\u017eit\u00ed pap\u00edrov\u00fdch obal\u016f pat\u0159\u00ed:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Skl\u00e1dac\u00ed kartonov\u00e9 krabice<\/li>\n\n\n\n<li>Vlnit\u00e1 vlo\u017eka<\/li>\n\n\n\n<li>Pap\u00edrov\u00e9 \u0161t\u00edtky<\/li>\n\n\n\n<li>Pota\u017een\u00fd karton<\/li>\n\n\n\n<li>Tiskov\u00e9 podklady<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Povrchy pap\u00edru se \u010dasto vyzna\u010duj\u00ed odli\u0161n\u00fdmi t\u0159ec\u00edmi vlastnostmi v d\u016fsledku drsnosti, povrchov\u00fdch \u00faprav, orientace vl\u00e1ken a absorpce vlhkosti. P\u0159i mnoha zpracovatelsk\u00fdch operac\u00edch ovliv\u0148uje v\u00fdkon stroje tak\u00e9 t\u0159en\u00ed mezi pap\u00edrem a plastov\u00fdmi f\u00f3liemi.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Porozum\u011bn\u00ed jak <strong>koeficient t\u0159en\u00ed pap\u00edru<\/strong> a plastov\u00fdch materi\u00e1l\u016f umo\u017e\u0148uje v\u00fdrobc\u016fm optimalizovat obalov\u00e9 syst\u00e9my vyu\u017e\u00edvaj\u00edc\u00ed v\u00edce materi\u00e1l\u016f.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Vyu\u017eit\u00ed testov\u00e1n\u00ed koeficientu t\u0159en\u00ed (COF) u obal\u016f<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Testov\u00e1n\u00ed koeficientu t\u0159en\u00ed (COF) obal\u016f<\/strong> se \u0161iroce vyu\u017e\u00edv\u00e1 v cel\u00e9m procesu v\u00fdvoje a v\u00fdroby produkt\u016f.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Flexibiln\u00ed obaly<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>S\u00e1\u010dky na sva\u010dinu<\/li>\n\n\n\n<li>Balen\u00ed mra\u017een\u00fdch potravin<\/li>\n\n\n\n<li>S\u00e1\u010dky pro sterilizaci v retort\u011b<\/li>\n\n\n\n<li>Vakuov\u00e9 s\u00e1\u010dky<\/li>\n\n\n\n<li>Stojac\u00ed s\u00e1\u010dky<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Farmaceutick\u00e9 obaly<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>L\u00e9ka\u0159sk\u00e9 ta\u0161ti\u010dky<\/li>\n\n\n\n<li>Materi\u00e1ly pro uz\u00e1v\u011bry blistr\u016f<\/li>\n\n\n\n<li>Steriln\u00ed bari\u00e9rov\u00e9 syst\u00e9my<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Spot\u0159ebn\u00ed zbo\u017e\u00ed<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Obaly pro osobn\u00ed hygienu<\/li>\n\n\n\n<li>Obalov\u00e9 materi\u00e1ly pro v\u00fdrobky pro dom\u00e1cnost<\/li>\n\n\n\n<li>Kosmetick\u00e9 flexibiln\u00ed obaly<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Pr\u016fmyslov\u00e9 balen\u00ed<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Stre\u010dov\u00e9 f\u00f3lie<\/li>\n\n\n\n<li>Smr\u0161titeln\u00e9 f\u00f3lie<\/li>\n\n\n\n<li>Ochrann\u00e9 vlo\u017eky<\/li>\n\n\n\n<li>Ta\u0161ky pro n\u00e1ro\u010dn\u00e9 pou\u017eit\u00ed<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Pravideln\u00e9 zkou\u0161ky t\u0159en\u00ed pom\u00e1haj\u00ed odhalit odchylky ve v\u00fdrob\u011b je\u0161t\u011b p\u0159edt\u00edm, ne\u017e se v\u00fdrobky dostanou k z\u00e1kazn\u00edk\u016fm.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Jak vybrat zku\u0161ebn\u00ed stroj pro m\u011b\u0159en\u00ed koeficientu t\u0159en\u00ed (COF)<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">V\u00fdb\u011br toho spr\u00e1vn\u00e9ho <strong>Zku\u0161ebn\u00ed stroj COF<\/strong> nejde jen o spln\u011bn\u00ed z\u00e1kladn\u00edch norem. Laborato\u0159e by m\u011bly posuzovat n\u011bkolik v\u00fdkonnostn\u00edch charakteristik.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Mezi d\u016fle\u017eit\u00e9 aspekty pat\u0159\u00ed:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Soulad s normami ASTM D1894 a ISO 8295<\/li>\n\n\n\n<li>Stabiln\u00ed regulace ta\u017en\u00e9 rychlosti<\/li>\n\n\n\n<li>Vysoce p\u0159esn\u00fd sn\u00edma\u010d zat\u00ed\u017een\u00ed<\/li>\n\n\n\n<li>Automatick\u00fd v\u00fdpo\u010det statick\u00e9ho a kinetick\u00e9ho koeficientu t\u0159en\u00ed (COF)<\/li>\n\n\n\n<li>Intuitivn\u00ed ovl\u00e1d\u00e1n\u00ed<\/li>\n\n\n\n<li>Mo\u017enosti ukl\u00e1d\u00e1n\u00ed a exportu dat<\/li>\n\n\n\n<li>Syst\u00e9m opakovateln\u00fdch pohyb\u016f<\/li>\n\n\n\n<li>Snadn\u00e1 instalace vzorku<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Modern\u00ed laborato\u0159e rovn\u011b\u017e vyu\u017e\u00edvaj\u00ed v\u00fdhody dotykov\u00fdch rozhran\u00ed, statistick\u00fdch anal\u00fdz a funkc\u00ed pro digit\u00e1ln\u00ed vykazov\u00e1n\u00ed.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">COF-01 \u2013 p\u0159\u00edstroj na m\u011b\u0159en\u00ed koeficientu t\u0159en\u00ed od spole\u010dnosti Cell Instruments<\/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-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-large is-resized\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"1024\" src=\"https:\/\/www.packtests.com\/wp-content\/uploads\/2026\/07\/COF-01cof-testing-machine-1024x1024.webp\" alt=\"ASTM D1894 \u2013 Zkou\u0161ka koeficientu t\u0159en\u00ed u obalov\u00fdch materi\u00e1l\u016f\" class=\"wp-image-1426\" style=\"width:314px;height:auto\" title=\"\" srcset=\"https:\/\/www.packtests.com\/wp-content\/uploads\/2026\/07\/COF-01cof-testing-machine-1024x1024.webp 1024w, https:\/\/www.packtests.com\/wp-content\/uploads\/2026\/07\/COF-01cof-testing-machine-300x300.webp 300w, https:\/\/www.packtests.com\/wp-content\/uploads\/2026\/07\/COF-01cof-testing-machine-150x150.webp 150w, https:\/\/www.packtests.com\/wp-content\/uploads\/2026\/07\/COF-01cof-testing-machine-768x768.webp 768w, https:\/\/www.packtests.com\/wp-content\/uploads\/2026\/07\/COF-01cof-testing-machine-12x12.webp 12w, https:\/\/www.packtests.com\/wp-content\/uploads\/2026\/07\/COF-01cof-testing-machine.webp 1080w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<p class=\"wp-block-paragraph\">Pro laborato\u0159e, kter\u00e9 pot\u0159ebuj\u00ed spolehliv\u00e9 <strong>zkou\u0161ka koeficientu t\u0159en\u00ed<\/strong> v\u00fdsledky, tedy <strong>COF-01 P\u0159\u00edstroj na m\u011b\u0159en\u00ed koeficientu t\u0159en\u00ed<\/strong> z <a href=\"https:\/\/www.packtests.com\/cs\/\" target=\"_blank\" rel=\"noreferrer noopener\">Cell Instruments<\/a> nab\u00edz\u00ed praktick\u00e9 \u0159e\u0161en\u00ed pro rutinn\u00ed kontrolu kvality i v\u00fdzkumn\u00e9 \u00fa\u010dely.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Hlavn\u00ed technick\u00e9 parametry<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Polo\u017eka<\/th><th>Specifikace<\/th><\/tr><\/thead><tbody><tr><td>Sn\u00edma\u010d zat\u00ed\u017een\u00ed<\/td><td>5 N (nastaviteln\u00e9)<\/td><\/tr><tr><td>P\u0159esnost<\/td><td>0,51 TP5T F.S.<\/td><\/tr><tr><td>Hmotnost san\u00ed<\/td><td>200 \u00b11 g<\/td><\/tr><tr><td>Rychlost testu<\/td><td>150 mm\/min (ASTM), 100 mm\/min (ISO)<\/td><\/tr><tr><td>Pohybov\u00fd syst\u00e9m<\/td><td>Krokov\u00fd motor s kuli\u010dkov\u00fdm vodic\u00edm \u0161roubem<\/td><\/tr><tr><td>U\u017eivatelsk\u00e9 rozhran\u00ed<\/td><td>\u0158\u00edzen\u00ed pomoc\u00ed PLC s dotykov\u00fdm displejem HMI<\/td><\/tr><tr><td>V\u00fdstup dat<\/td><td>Max., Min., pr\u016fm\u011brn\u00fd koeficient t\u0159en\u00ed (COF), tisk\u00e1rna, voliteln\u00e9 rozhran\u00ed RS-232<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">Praktick\u00e9 vlastnosti<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Za\u0159\u00edzen\u00ed COF-01 je navr\u017eeno tak, aby zv\u00fd\u0161ilo efektivitu testov\u00e1n\u00ed prost\u0159ednictv\u00edm:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Dvojre\u017eimov\u00e9 statick\u00e9 a kinetick\u00e9 zkou\u0161ky<\/li>\n\n\n\n<li>Automatick\u00fd sb\u011br dat<\/li>\n\n\n\n<li>Zobrazen\u00ed k\u0159ivky t\u0159en\u00ed v re\u00e1ln\u00e9m \u010dase<\/li>\n\n\n\n<li>Opakovateln\u00fd p\u0159esn\u00fd pohyb<\/li>\n\n\n\n<li>Odoln\u00e1 hlin\u00edkov\u00e1 zku\u0161ebn\u00ed plo\u0161ina<\/li>\n\n\n\n<li>Jazykov\u00e9 rozhran\u00ed s mo\u017enost\u00ed p\u0159izp\u016fsoben\u00ed<\/li>\n\n\n\n<li>Ochrana proti p\u0159et\u00ed\u017een\u00ed a automatick\u00fd n\u00e1vrat<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Tyto funkce pom\u00e1haj\u00ed laborato\u0159\u00edm dosahovat konzistentn\u00edch a opakovateln\u00fdch v\u00fdsledk\u016f a z\u00e1rove\u0148 zjednodu\u0161uj\u00ed ka\u017edodenn\u00ed provoz.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Osv\u011bd\u010den\u00e9 postupy pro spolehliv\u00e9 prov\u00e1d\u011bn\u00ed zkou\u0161ek podle normy ASTM D1894<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Pro zaji\u0161t\u011bn\u00ed konzistentnosti m\u011b\u0159en\u00ed:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Vzorky p\u0159ipravujte za kontrolovan\u00fdch laboratorn\u00edch podm\u00ednek.<\/li>\n\n\n\n<li>S vzorky manipulujte pokud mo\u017eno v rukavic\u00edch.<\/li>\n\n\n\n<li>Pro ka\u017ed\u00fd test pou\u017e\u00edvejte \u010derstv\u00e9 vzorky.<\/li>\n\n\n\n<li>Udr\u017eujte testovac\u00ed platformu v \u010distot\u011b.<\/li>\n\n\n\n<li>Pravideln\u011b kontrolujte hmotnost san\u00ed.<\/li>\n\n\n\n<li>Sn\u00edma\u010d zat\u00ed\u017een\u00ed pravideln\u011b kalibrujte.<\/li>\n\n\n\n<li>Dodr\u017eujte stanovenou rychlost ta\u017een\u00ed.<\/li>\n\n\n\n<li>Prove\u010fte dostate\u010dn\u00fd po\u010det opakov\u00e1n\u00ed, aby byla zaji\u0161t\u011bna statistick\u00e1 spolehlivost.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Konzistentn\u00ed laboratorn\u00ed postupy \u010dasto p\u0159isp\u00edvaj\u00ed k opakovatelnosti v\u00fdsledk\u016f v\u00edce ne\u017e samotn\u00fd p\u0159\u00edstroj.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">ASTM D1894 a souvisej\u00edc\u00ed normy<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A\u010dkoli <strong>ASTM D1894<\/strong> je jednou z nej\u010dast\u011bji pou\u017e\u00edvan\u00fdch norem pro m\u011b\u0159en\u00ed t\u0159en\u00ed u plastov\u00fdch f\u00f3li\u00ed; laborato\u0159e \u010dasto pracuj\u00ed s p\u0159\u00edbuzn\u00fdmi normami v z\u00e1vislosti na materi\u00e1lu a konkr\u00e9tn\u00edm pou\u017eit\u00ed.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Standardn\u00ed<\/th><th>\u017d\u00e1dost<\/th><\/tr><\/thead><tbody><tr><td>ASTM D1894<\/td><td>Statick\u00fd a kinetick\u00fd koeficient t\u0159en\u00ed (COF) plastov\u00fdch f\u00f3li\u00ed a desek<\/td><\/tr><tr><td>ISO 8295<\/td><td>Koeficient t\u0159en\u00ed plastov\u00fdch f\u00f3li\u00ed a plachet<\/td><\/tr><tr><td>ASTM D2534<\/td><td>Koeficient t\u0159en\u00ed voskov\u00fdch povlak\u016f<\/td><\/tr><tr><td>TAPPI T549<\/td><td>Zkou\u0161ky t\u0159en\u00ed u pap\u00edru a lepenky<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">V\u00fdb\u011br vhodn\u00e9 normy zaru\u010duje, \u017ee v\u00fdsledky budou odpov\u00eddat specifikac\u00edm v\u00fdrobku a po\u017eadavk\u016fm z\u00e1kazn\u00edk\u016f.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Z\u00e1v\u011br<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">T\u0159en\u00ed na povrchu m\u00e1 v\u00fdznamn\u00fd vliv na v\u00fdkonnost balen\u00ed, efektivitu v\u00fdroby a kvalitu v\u00fdrobk\u016f. <a href=\"https:\/\/store.astm.org\/d1894-24.html\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">ASTM D1894<\/a> poskytuje standardizovanou metodu pro m\u011b\u0159en\u00ed charakteristik statick\u00e9ho i kinetick\u00e9ho t\u0159en\u00ed, co\u017e v\u00fdrobc\u016fm umo\u017e\u0148uje sledovat konzistenci v\u00fdrobn\u00edho procesu, vyhodnocovat zm\u011bny v materi\u00e1lech a optimalizovat vlastnosti obal\u016f.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A\u0165 u\u017e jde o posouzen\u00ed <strong>koeficient t\u0159en\u00ed plastov\u00e9 f\u00f3lie<\/strong>, p\u0159i\u010dem\u017e se posuzuje <strong>koeficient t\u0159en\u00ed pap\u00edru<\/strong>, nebo prov\u00e1d\u011bn\u00ed rutinn\u00edch <strong>testov\u00e1n\u00ed COF obal\u016f<\/strong>, spolehliv\u00e9 vybaven\u00ed a standardizovan\u00e9 postupy jsou nezbytn\u00e9 pro z\u00edsk\u00e1n\u00ed smyslupln\u00fdch v\u00fdsledk\u016f. Vysoce kvalitn\u00ed <strong>Zku\u0161ebn\u00ed stroj COF<\/strong>, v kombinaci se spr\u00e1vnou p\u0159\u00edpravou vzork\u016f a kontrolovan\u00fdmi laboratorn\u00edmi podm\u00ednkami, umo\u017e\u0148uje v\u00fdrobc\u016fm \u010dinit informovan\u00e1 rozhodnut\u00ed ohledn\u011b kvality, sni\u017eovat kol\u00eds\u00e1n\u00ed ve v\u00fdrob\u011b a zlep\u0161ovat vlastnosti obal\u016f v cel\u00e9 \u0159ad\u011b pr\u016fmyslov\u00fdch odv\u011btv\u00ed.<\/p>","protected":false},"excerpt":{"rendered":"<p>Plastic films play a critical role in modern packaging, from food pouches and pharmaceutical sachets to industrial liners and consumer product wrapping. One of the most important surface characteristics influencing package performance is the ASTM D1894 coefficient of friction (COF). An improper friction level can lead to production downtime, poor machinability, unstable pallet loads, or [&hellip;]<\/p>","protected":false},"featured_media":1426,"parent":0,"template":"","meta":{"_acf_changed":false},"standard-category":[],"class_list":["post-1425","standard","type-standard","status-publish","has-post-thumbnail","hentry"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.packtests.com\/cs\/wp-json\/wp\/v2\/standard\/1425","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":5,"href":"https:\/\/www.packtests.com\/cs\/wp-json\/wp\/v2\/standard\/1425\/revisions"}],"predecessor-version":[{"id":1590,"href":"https:\/\/www.packtests.com\/cs\/wp-json\/wp\/v2\/standard\/1425\/revisions\/1590"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.packtests.com\/cs\/wp-json\/wp\/v2\/media\/1426"}],"wp:attachment":[{"href":"https:\/\/www.packtests.com\/cs\/wp-json\/wp\/v2\/media?parent=1425"}],"wp:term":[{"taxonomy":"standard-category","embeddable":true,"href":"https:\/\/www.packtests.com\/cs\/wp-json\/wp\/v2\/standard-category?post=1425"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}