{"id":9845,"date":"2026-02-24T15:11:45","date_gmt":"2026-02-24T07:11:45","guid":{"rendered":"https:\/\/www.packqc.com\/standard\/astm-d4917-2\/"},"modified":"2026-03-12T10:37:47","modified_gmt":"2026-03-12T02:37:47","slug":"astm-d4917","status":"publish","type":"standard","link":"https:\/\/www.packqc.com\/cs\/standard\/astm-d4917\/","title":{"rendered":"ASTM D4917"},"content":{"rendered":"<h2 class=\"wp-block-heading\">Pochopen\u00ed koeficientu t\u0159en\u00ed p\u0159i testov\u00e1n\u00ed pap\u00edru<\/h2>\n\n\n\n<p><strong data-start=\"1472\" data-end=\"1505\">Koeficient t\u0159en\u00ed (COF)<\/strong> je kl\u00ed\u010dov\u00fd parametr, kter\u00fd odr\u00e1\u017e\u00ed odpor pohybu mezi dv\u011bma povrchy. V aplikac\u00edch pap\u00edru tato hodnota ovliv\u0148uje, jak jeden list klou\u017ee po druh\u00e9m. . <strong data-start=\"1674\" data-end=\"1688\">statick\u00e9 COF<\/strong> ur\u010duje s\u00edlu pot\u0159ebnou k zah\u00e1jen\u00ed pohybu, zat\u00edmco hodnota <strong data-start=\"1752\" data-end=\"1767\">kinetick\u00e9 COF<\/strong> m\u011b\u0159\u00ed s\u00edlu pot\u0159ebnou k udr\u017een\u00ed konstantn\u00ed rychlosti pohybu. Norma ASTM D4917 umo\u017e\u0148uje ob\u011b m\u011b\u0159en\u00ed pomoc\u00ed horizont\u00e1ln\u00edho posuvn\u00e9ho pohybu.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Testovac\u00ed za\u0159\u00edzen\u00ed a p\u0159\u00edprava vzork\u016f<\/h2>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<div class=\"ast-oembed-container\" style=\"height: 100%;\"><iframe title=\"Prob\u00edhaj\u00edc\u00ed zkou\u0161ka sou\u010dinitele t\u0159en\u00ed pap\u00edru\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/Iq-UFiGqF64?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/div>\n<\/div><\/figure>\n\n\n\n<p>Pro proveden\u00ed spolehliv\u00fdch zkou\u0161ek COF podle normy ASTM D4917 je nezbytn\u00e9 specializovan\u00e9 vybaven\u00ed. A <strong data-start=\"3843\" data-end=\"3877\">tester konstantn\u00ed rychlosti pohybu<\/strong>, vybaven\u00fd sn\u00edma\u010dem zat\u00ed\u017een\u00ed a schopn\u00fd t\u00e1hnout s\u00e1\u0148ky rychlost\u00ed 150 \u00b1 30 mm\/min, se obvykle pou\u017e\u00edv\u00e1.<\/p>\n\n\n\n<p>Pro p\u0159esn\u00e9 v\u00fdsledky by m\u011bly b\u00fdt vzorky p\u0159edem p\u0159ipraveny za standardn\u00edch atmosf\u00e9rick\u00fdch podm\u00ednek (podle TAPPI T402 nebo ASTM D685) a p\u0159ipraveny v souladu se sm\u011brem stroje a orientac\u00ed zrn.<\/p>\n\n\n\n<p>Doporu\u010dujeme <strong data-start=\"4191\" data-end=\"4249\">Cell Instruments COF-01 Tester sou\u010dinitele t\u0159en\u00ed<\/strong>, vysoce p\u0159esn\u00fd horizont\u00e1ln\u00ed rovinn\u00fd p\u0159\u00edstroj navr\u017een\u00fd tak, aby spl\u0148oval po\u017eadavky norem ASTM D4917 a ISO 8295. Je vybaven digit\u00e1ln\u00edm ovl\u00e1d\u00e1n\u00edm, nastaviteln\u00fdmi mo\u017enostmi san\u00ed a automatick\u00fdm m\u011b\u0159en\u00edm s\u00edly - co\u017e zaji\u0161\u0165uje p\u0159esn\u00e9 a reprodukovateln\u00e9 v\u00fdsledky statick\u00fdch i kinetick\u00fdch test\u016f COF.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Vysv\u011btlen\u00ed statick\u00e9ho a kinetick\u00e9ho t\u0159en\u00ed pap\u00edru<\/h2>\n\n\n\n<p>Testov\u00e1n\u00ed pap\u00edru podle normy ASTM D4917 zahrnuje polo\u017een\u00ed jednoho listu pap\u00edru na rovn\u00fd vodorovn\u00fd povrch a polo\u017een\u00ed druh\u00e9ho stejn\u00e9ho listu na n\u011bj. Na horn\u00ed list se polo\u017e\u00ed s\u00e1\u0148ky (obvykle s gumov\u00fdm povrchem). P\u0159i tah\u00e1n\u00ed s\u00e1n\u011bk se m\u011b\u0159\u00ed s\u00edla pot\u0159ebn\u00e1 k zah\u00e1jen\u00ed pohybu (statick\u00e9 t\u0159en\u00ed) a s\u00edla pot\u0159ebn\u00e1 k pokra\u010dov\u00e1n\u00ed pohybu (kinetick\u00e9 t\u0159en\u00ed).<\/p>\n\n\n\n<p>Tento <strong data-start=\"2334\" data-end=\"2368\">testov\u00e1n\u00ed kinetick\u00e9ho t\u0159en\u00ed pap\u00edru<\/strong> a <strong data-start=\"2373\" data-end=\"2406\">statick\u00e9 zkou\u0161ky t\u0159en\u00ed pap\u00edru<\/strong> poskytuje d\u016fle\u017eit\u00e9 \u00fadaje pro pochopen\u00ed odd\u011blov\u00e1n\u00ed arch\u016f, konzistence pod\u00e1v\u00e1n\u00ed a zarovn\u00e1n\u00ed tisku ve vysokorychlostn\u00edch syst\u00e9mech.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Aplikace normy ASTM D4917 p\u0159i zkou\u0161en\u00ed COF u tiskov\u00e9ho a nenat\u00edran\u00e9ho pap\u00edru<\/h2>\n\n\n\n<p>The <strong data-start=\"2613\" data-end=\"2640\">test COF tiskov\u00e9ho pap\u00edru<\/strong> je d\u016fle\u017eit\u00fd zejm\u00e9na v prost\u0159ed\u00ed tiska\u0159sk\u00fdch stroj\u016f, kde t\u0159en\u00ed zaji\u0161\u0165uje p\u0159esnost pod\u00e1v\u00e1n\u00ed jednotliv\u00fdch list\u016f a omezuje zasek\u00e1v\u00e1n\u00ed nebo chybn\u00e9 pod\u00e1v\u00e1n\u00ed. Podobn\u011b, <strong data-start=\"2799\" data-end=\"2826\">test COF na nenat\u00edran\u00e9m pap\u00edru<\/strong> pom\u00e1h\u00e1 v\u00fdrobc\u016fm pap\u00edru ov\u011b\u0159it specifikace v\u00fdrobku p\u0159ed jeho zpracov\u00e1n\u00edm nebo dod\u00e1n\u00edm.<\/p>\n\n\n\n<p>V obou p\u0159\u00edpadech nab\u00edz\u00ed norma ASTM D4917 standardizovan\u00fd p\u0159\u00edstup, kter\u00fd sni\u017euje variabilitu testov\u00e1n\u00ed a zaji\u0161\u0165uje shodu s pr\u016fmyslov\u00fdmi m\u011b\u0159\u00edtky kvality.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Pro\u010d pou\u017e\u00edvat metodu ASTM D4917 m\u00edsto jin\u00fdch metod?<\/h2>\n\n\n\n<p>Na rozd\u00edl od metod naklon\u011bn\u00e9 roviny (nap\u0159. ASTM D4918), kter\u00e9 nemohou ur\u010dit kinetick\u00e9 t\u0159en\u00ed COF, umo\u017e\u0148uje norma ASTM D4917 p\u0159esn\u00e9 vyhodnocen\u00ed statick\u00e9ho i kinetick\u00e9ho t\u0159en\u00ed p\u0159i horizont\u00e1ln\u00edm pohybu. Nav\u00edc minimalizuje opot\u0159eben\u00ed p\u0159i klouz\u00e1n\u00ed t\u00edm, \u017ee testuje pouze prvn\u00ed kontakt, co\u017e l\u00e9pe simuluje re\u00e1ln\u00e9 sc\u00e9n\u00e1\u0159e manipulace s plechy.<\/p>\n\n\n\n<p>Pro pevn\u011bj\u0161\u00ed materi\u00e1ly, jako je vlnit\u00e1 lepenka, je vhodn\u011bj\u0161\u00ed norma ASTM D4521 nebo ASTM D3247. Ale pro <strong data-start=\"3557\" data-end=\"3592\">tenk\u00e9, pru\u017en\u00e9, nenat\u00edran\u00e9 pap\u00edry<\/strong>, D4917 je metodou doporu\u010dovanou v\u011bt\u0161inou zpracovatel\u016f pap\u00edru a balic\u00edch laborato\u0159\u00ed.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">V\u00fdb\u011br spr\u00e1vn\u00e9ho testeru sou\u010dinitele t\u0159en\u00ed<\/h2>\n\n\n\n<p>Abyste splnili po\u017eadavky normy ASTM D4917 a dos\u00e1hli p\u0159esn\u00fdch v\u00fdsledk\u016f COF na pap\u00ed\u0159e, doporu\u010dujeme pou\u017e\u00edt <strong data-start=\"4239\" data-end=\"4270\">Bun\u011b\u010dn\u00e9 n\u00e1stroje <a href=\"https:\/\/www.packqc.com\/cs\/product\/coefficient-of-friction-testing-equipment\/\">COF-01<\/a> Tester<\/strong>, kter\u00fd je optimalizov\u00e1n pro:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>horizont\u00e1ln\u00ed testov\u00e1n\u00ed<\/li>\n\n\n\n<li>M\u011b\u0159en\u00ed statick\u00e9ho a kinetick\u00e9ho t\u0159en\u00ed<\/li>\n\n\n\n<li>Zak\u00e1zkov\u00e1 konstrukce p\u0159\u00edpravk\u016f pro nenat\u00edran\u00e9 a speci\u00e1ln\u00ed pap\u00edry<\/li>\n\n\n\n<li>Chytr\u00e9 zaznamen\u00e1v\u00e1n\u00ed dat\u00a0<\/li>\n<\/ul>\n\n\n\n<p>Zkou\u0161e\u010dky t\u0159en\u00ed Cell Instruments, podporovan\u00e9 robustn\u00ed technickou a aplika\u010dn\u00ed podporou, zaji\u0161\u0165uj\u00ed p\u0159esnost a opakovatelnost na r\u016fzn\u00fdch pap\u00edrov\u00fdch substr\u00e1tech.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Kontaktujte n\u00e1s Z\u00edskejte \u0159e\u0161en\u00ed pro testov\u00e1n\u00ed podle normy ASTM D4917 <\/h2>\n\n\n\n<p>T\u0159ec\u00ed vlastnosti pap\u00edrov\u00fdch materi\u00e1l\u016f v\u00fdznamn\u011b ovliv\u0148uj\u00ed v\u00fdkon v tiska\u0159sk\u00fdch, balic\u00edch a zpracovatelsk\u00fdch operac\u00edch. <strong data-start=\"5267\" data-end=\"5281\">ASTM D4917<\/strong> poskytuje standardizovan\u00fd a spolehliv\u00fd r\u00e1mec pro m\u011b\u0159en\u00ed statick\u00e9ho i kinetick\u00e9ho t\u0159en\u00ed nenat\u00edran\u00e9ho psac\u00edho a tiskov\u00e9ho pap\u00edru. S p\u0159esn\u00fdmi p\u0159\u00edstroji, jako je nap\u0159. <strong data-start=\"5448\" data-end=\"5478\">COF-01 od <a href=\"https:\/\/www.packqc.com\/cs\/\">Bun\u011b\u010dn\u00e9 n\u00e1stroje<\/a><\/strong>, mohou odborn\u00edci na kvalitu s jistotou prov\u00e1d\u011bt testy, interpretovat v\u00fdsledky a zav\u00e1d\u011bt zlep\u0161en\u00ed.<\/p>\n\n\n\n<p>A\u0165 u\u017e testujete <strong data-start=\"5608\" data-end=\"5634\">kinetick\u00e9 t\u0159en\u00ed pap\u00edru<\/strong>, <strong data-start=\"5636\" data-end=\"5655\">statick\u00e9 t\u0159en\u00ed<\/strong>, <strong data-start=\"5657\" data-end=\"5679\">tiskov\u00fd pap\u00edr COF<\/strong>nebo prov\u00e1d\u011bn\u00ed <strong data-start=\"5698\" data-end=\"5725\">test COF na nenat\u00edran\u00e9m pap\u00edru<\/strong>, pochopen\u00ed a pou\u017eit\u00ed normy ASTM D4917 zajist\u00ed, \u017ee va\u0161e v\u00fdsledky budou smyslupln\u00e9, reprodukovateln\u00e9 a v souladu s celosv\u011btov\u00fdmi normami.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Nej\u010dast\u011bj\u0161\u00ed dotazy<\/h2>\n\n\n\n<p><a tabindex=\"0\">1. Co m\u011b\u0159\u00ed norma ASTM D4917?<\/a><br>Norma ASTM D4917 m\u011b\u0159\u00ed koeficient statick\u00e9ho a kinetick\u00e9ho t\u0159en\u00ed nenat\u00edran\u00e9ho psac\u00edho a tiska\u0159sk\u00e9ho pap\u00edru metodou horizont\u00e1ln\u00ed roviny.<\/p>\n\n\n\n<p><a tabindex=\"0\">2. Pro\u010d je u v\u00fdrobk\u016f z pap\u00edru d\u016fle\u017eit\u00e9 testov\u00e1n\u00ed t\u0159en\u00ed?<\/a><br>T\u0159en\u00ed ovliv\u0148uje spolehlivost pod\u00e1v\u00e1n\u00ed v tisk\u00e1rn\u00e1ch a kop\u00edrk\u00e1ch a zaji\u0161\u0165uje spr\u00e1vnou manipulaci ve zpracovatelsk\u00fdch a balic\u00edch stroj\u00edch.<\/p>\n\n\n\n<p><a tabindex=\"0\">3. Jak se li\u0161\u00ed statick\u00e1 COF od kinetick\u00e9 COF?<\/a><br>Statick\u00e1 COF m\u011b\u0159\u00ed s\u00edlu pro zah\u00e1jen\u00ed pohybu mezi dv\u011bma povrchy, zat\u00edmco kinetick\u00e1 COF m\u011b\u0159\u00ed s\u00edlu pro pokra\u010dov\u00e1n\u00ed tohoto pohybu.<\/p>\n\n\n\n<p><a tabindex=\"0\">4. M\u016f\u017ee <\/a><a href=\"https:\/\/store.astm.org\/d4917-97r07e01.html\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">ASTM D4917<\/a><a tabindex=\"0\"> pro nat\u00edran\u00e9 nebo speci\u00e1ln\u00ed pap\u00edry?<\/a><br>A\u010dkoli je optimalizov\u00e1na pro nenat\u00edran\u00e9 psac\u00ed a tiskov\u00e9 pap\u00edry, lze normu ASTM D4917 pou\u017e\u00edt i pro jin\u00e9 typy pap\u00edru, i kdy\u017e se v\u00fdsledky mohou li\u0161it v p\u0159esnosti.<\/p>","protected":false},"excerpt":{"rendered":"<p>Understanding Coefficient of Friction in Paper Testing Coefficient of friction (COF) is a crucial parameter that reflects the resistance to motion between two surfaces. In paper applications, this value influences how one sheet slides over another. The static COF determines the force required to start the movement, while the kinetic COF measures the force needed [&hellip;]<\/p>","protected":false},"featured_media":10018,"parent":0,"template":"","meta":{"_acf_changed":true,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}}},"standard-category":[],"class_list":["post-9845","standard","type-standard","status-publish","has-post-thumbnail","hentry"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.packqc.com\/cs\/wp-json\/wp\/v2\/standard\/9845","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.packqc.com\/cs\/wp-json\/wp\/v2\/standard"}],"about":[{"href":"https:\/\/www.packqc.com\/cs\/wp-json\/wp\/v2\/types\/standard"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.packqc.com\/cs\/wp-json\/wp\/v2\/media\/10018"}],"wp:attachment":[{"href":"https:\/\/www.packqc.com\/cs\/wp-json\/wp\/v2\/media?parent=9845"}],"wp:term":[{"taxonomy":"standard-category","embeddable":true,"href":"https:\/\/www.packqc.com\/cs\/wp-json\/wp\/v2\/standard-category?post=9845"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}