{"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\/bs\/standard\/astm-d4917\/","title":{"rendered":"ASTM D4917"},"content":{"rendered":"<h2 class=\"wp-block-heading\">Razumijevanje koeficijenta trenja pri ispitivanju papira<\/h2>\n\n\n\n<p><strong data-start=\"1472\" data-end=\"1505\">Koeficijent trenja (COF)<\/strong> je klju\u010dni parametar koji odra\u017eava otpor kretanju izme\u0111u dviju povr\u0161ina. U primjenama na papiru, ova vrijednost utje\u010de na to kako se jedan list klizi preko drugog. <strong data-start=\"1674\" data-end=\"1688\">statik COF<\/strong> odre\u0111uje silu potrebnu za pokretanje kretanja, dok <strong data-start=\"1752\" data-end=\"1767\">kineti\u010dki COF<\/strong> Mjeri silu potrebnu za odr\u017eavanje kretanja pri konstantnoj brzini. ASTM D4917 omogu\u0107ava oba mjerenja koriste\u0107i horizontalno klizno kretanje.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Razmatranja u vezi s opremom za ispitivanje i pripremom uzoraka<\/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=\"U toku je test koeficijenta trenja papira\" 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>Za provo\u0111enje pouzdanih COF testova prema ASTM D4917 neophodna je specijalizovana oprema. A <strong data-start=\"3843\" data-end=\"3877\">tester konstantne brzine kretanja<\/strong>, opremljen optere\u0107enskom \u0107elijom i sposoban vu\u0107i sanke brzinom od 150 \u00b1 30 mm\/min, obi\u010dno se koristi.<\/p>\n\n\n\n<p>Za precizne rezultate, uzorci bi trebali biti predtretirani pod standardnim atmosferskim uslovima (prema TAPPI T402 ili ASTM D685) i pripremljeni u skladu s pravcem ma\u0161ine i orijentacijom vlakana.<\/p>\n\n\n\n<p>Preporu\u010dujemo <strong data-start=\"4191\" data-end=\"4249\">Cell Instruments COF-01 tester koeficijenta trenja<\/strong>, visokoprecizni instrument horizontalne ravni dizajniran da zadovolji zahtjeve ASTM D4917 i ISO 8295. Ima digitalnu kontrolu, podesive opcije sanjki i automatizirano mjerenje sile\u2014\u0161to osigurava precizne, reproducibilne rezultate za stati\u010dka i kineti\u010dka ispitivanja koeficijenta trenja.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Obja\u0161njenje ispitivanja stati\u010dkog i kineti\u010dkog trenja papira<\/h2>\n\n\n\n<p>Testiranje papira prema ASTM D4917 podrazumijeva postavljanje jednog lista papira na ravnu horizontalnu povr\u0161inu i na njega postavljanje jo\u0161 jednog identi\u010dnog lista. Na gornji list se postavlja san\u010dica (obi\u010dno oblo\u017eena gumom). Dok se san\u010dica vu\u010de, mjere se sila potrebna za pokretanje kretanja (statisti\u010dko trenje) i sila potrebna za odr\u017eavanje kretanja (kineti\u010dko trenje).<\/p>\n\n\n\n<p>Ovo <strong data-start=\"2334\" data-end=\"2368\">testiranje kineti\u010dkog trenja na papiru<\/strong> i <strong data-start=\"2373\" data-end=\"2406\">testiranje papirne stati\u010dke trenje<\/strong> Pru\u017ea klju\u010dne podatke za razumijevanje odvajanja listova, konzistencije papira i poravnanja tiska u brzim sistemima.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Primjene ASTM D4917 u ispitivanju COF-a u tiskanju i na nepremazanom papiru<\/h2>\n\n\n\n<p>The <strong data-start=\"2613\" data-end=\"2640\">test COF-a za papir za \u0161tampanje<\/strong> je posebno va\u017ean u okru\u017eenjima \u0161tampe, gdje dosljednost trenja osigurava preciznost uvla\u010denja pojedina\u010dnih listova i smanjuje zaglavljivanja ili neispravno uvla\u010denje. Sli\u010dno tome, <strong data-start=\"2799\" data-end=\"2826\">test COF-a na nepremazanom papiru<\/strong> Poma\u017ee proizvo\u0111a\u010dima papira da provjere specifikacije proizvoda prije prerade ili isporuke.<\/p>\n\n\n\n<p>U oba slu\u010daja primjene, ASTM D4917 nudi standardizirani pristup koji smanjuje varijabilnost ispitivanja i osigurava uskla\u0111enost s industrijskim standardima kvaliteta.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Za\u0161to koristiti ASTM D4917 umjesto drugih metoda?<\/h2>\n\n\n\n<p>Za razliku od metoda kose ravni (kao \u0161to je ASTM D4918), koje ne mogu odrediti kineti\u010dki koeficijent trenja, ASTM D4917 omogu\u0107ava preciznu procjenu i stati\u010dkog i kineti\u010dkog trenja kroz horizontalno kretanje. Nadalje, minimizira habanje klizanjem testiranjem samo pri prvom kontaktu, \u0161to bolje simulira stvarne scenarije rukovanja limovima.<\/p>\n\n\n\n<p>Za krutije materijale poput valovitog kartona, ASTM D4521 ili ASTM D3247 je prikladnija. Ali za <strong data-start=\"3557\" data-end=\"3592\">tanki, fleksibilni, neprekriveni papiri<\/strong>, D4917 je preporu\u010dena metoda koju primjenjuje ve\u0107ina prera\u0111iva\u010da papira i pakirnih laboratorija.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Odabir pravog testeru koeficijenta trenja<\/h2>\n\n\n\n<p>Kako bi se ispunio ASTM D4917 i postigli precizni rezultati COF papira, preporu\u010dujemo <strong data-start=\"4239\" data-end=\"4270\">Cell Instruments <a href=\"https:\/\/www.packqc.com\/bs\/product\/coefficient-of-friction-testing-equipment\/\">COF-01<\/a> Tester<\/strong>, \u0161to je optimizirano za:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>horizontalno testiranje<\/li>\n\n\n\n<li>Mjerenja stati\u010dkog i kineti\u010dkog trenja<\/li>\n\n\n\n<li>Prilago\u0111eni dizajn opreme za nepremazane i specijalne papire<\/li>\n\n\n\n<li>Pametno snimanje podataka\u00a0<\/li>\n<\/ul>\n\n\n\n<p>Podr\u017eani robusnim in\u017eenjeringom i podr\u0161kom pri primjeni, Cell Instruments testeri trenja osiguravaju preciznost i ponovljivost na razli\u010ditim papirnim podlogama.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Kontaktirajte nas za rje\u0161enje za ispitivanje prema ASTM D4917 <\/h2>\n\n\n\n<p>Karakteristike trenja papirnih materijala zna\u010dajno uti\u010du na performanse u procesima \u0161tampe, pakovanja i prerade. <strong data-start=\"5267\" data-end=\"5281\">ASTM D4917<\/strong> Pru\u017ea standardizirani, pouzdani okvir za mjerenje stati\u010dkog i kineti\u010dkog trenja neprevle\u010denog papira za pisanje i \u0161tampanje. Uz precizne instrumente poput <strong data-start=\"5448\" data-end=\"5478\">COF-01 od <a href=\"https:\/\/www.packqc.com\/bs\/\">Cell Instruments<\/a><\/strong>, kvalitetni profesionalci mogu samouvjereno izvoditi testove, tuma\u010diti rezultate i provoditi pobolj\u0161anja.<\/p>\n\n\n\n<p>Bilo da testirate za <strong data-start=\"5608\" data-end=\"5634\">papir kineti\u010dko trenje<\/strong>, <strong data-start=\"5636\" data-end=\"5655\">statik trenje<\/strong>, <strong data-start=\"5657\" data-end=\"5679\">COF za papir za \u0161tampu<\/strong>, ili provo\u0111enje jednog <strong data-start=\"5698\" data-end=\"5725\">test COF-a na nepremazanom papiru<\/strong>, Razumijevanje i primjena norme ASTM D4917 osigurava da su va\u0161i rezultati smisleni, reproducibilni i uskla\u0111eni s globalnim standardima.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">FAQs<\/h2>\n\n\n\n<p><a tabindex=\"0\">1. \u0160ta mjeri ASTM D4917?<\/a><br>ASTM D4917 mjeri koeficijent stati\u010dkog i kineti\u010dkog trenja neprevle\u010denog pisarskog i \u0161tamparskog papira primjenom metode horizontalne ravni.<\/p>\n\n\n\n<p><a tabindex=\"0\">2. Za\u0161to je ispitivanje trenja va\u017eno za papirne proizvode?<\/a><br>Trljanje utje\u010de na pouzdanost dovoda papira u pisa\u010dima i fotokopirima te osigurava pravilno rukovanje u ma\u0161inama za preradu i pakovanje.<\/p>\n\n\n\n<p><a tabindex=\"0\">3. Kako se stati\u010dki COF razlikuje od kineti\u010dkog COF-a?<\/a><br>Stati\u010dki koeficijent trenja mjeri silu potrebnu za pokretanje kretanja izme\u0111u dviju povr\u0161ina, dok kineti\u010dki koeficijent trenja mjeri silu potrebnu za nastavak tog kretanja.<\/p>\n\n\n\n<p><a tabindex=\"0\">4. Mo\u017ee <\/a><a href=\"https:\/\/store.astm.org\/d4917-97r07e01.html\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">ASTM D4917<\/a><a tabindex=\"0\"> mo\u017ee li se koristiti za premazane ili specijalne papire?<\/a><br>Iako je optimiziran za nepremazane papire za pisanje i \u0161tampanje, ASTM D4917 se mo\u017ee koristiti i za druge vrste papira, iako se preciznost rezultata mo\u017ee razlikovati.<\/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\/bs\/wp-json\/wp\/v2\/standard\/9845","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.packqc.com\/bs\/wp-json\/wp\/v2\/standard"}],"about":[{"href":"https:\/\/www.packqc.com\/bs\/wp-json\/wp\/v2\/types\/standard"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.packqc.com\/bs\/wp-json\/wp\/v2\/media\/10018"}],"wp:attachment":[{"href":"https:\/\/www.packqc.com\/bs\/wp-json\/wp\/v2\/media?parent=9845"}],"wp:term":[{"taxonomy":"standard-category","embeddable":true,"href":"https:\/\/www.packqc.com\/bs\/wp-json\/wp\/v2\/standard-category?post=9845"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}