{"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\/lt\/standard\/astm-d4917\/","title":{"rendered":"ASTM D4917"},"content":{"rendered":"<h2 class=\"wp-block-heading\">Trinties koeficiento supratimas atliekant popieriaus bandymus<\/h2>\n\n\n\n<p><strong data-start=\"1472\" data-end=\"1505\">Trinties koeficientas (COF)<\/strong> yra labai svarbus parametras, atspindintis pasiprie\u0161inim\u0105 jud\u0117jimui tarp dviej\u0173 pavir\u0161i\u0173. Naudojant popieri\u0173, \u0161i vert\u0117 turi \u012ftakos tam, kaip vienas lapas slysta per kit\u0105. . <strong data-start=\"1674\" data-end=\"1688\">statinis COF<\/strong> lemia j\u0117g\u0105, reikaling\u0105 judesiui prad\u0117ti, o <strong data-start=\"1752\" data-end=\"1767\">kinetinis COF<\/strong> matuoja j\u0117g\u0105, kurios reikia, kad jud\u0117jimas vykt\u0173 pastoviu grei\u010diu. Pagal ASTM D4917 galima atlikti abu matavimus naudojant horizontal\u0173j\u012f slenkam\u0105j\u012f judes\u012f.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Bandym\u0173 \u012franga ir m\u0117gini\u0173 paruo\u0161imo aspektai<\/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=\"Atliekamas popieriaus trinties koeficiento bandymas\" 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>Norint atlikti patikimus COF bandymus pagal ASTM D4917 standart\u0105, b\u016btina specializuota \u012franga. A <strong data-start=\"3843\" data-end=\"3877\">pastovaus judesio grei\u010dio testeris<\/strong>, kuriame \u012frengtas apkrovos jutiklis ir kuris gali traukti rogutes 150 \u00b1 30 mm\/min grei\u010diu.<\/p>\n\n\n\n<p>Norint gauti tikslius rezultatus, bandiniai turi b\u016bti i\u0161 anksto paruo\u0161ti standartin\u0117mis atmosferos s\u0105lygomis (pagal TAPPI T402 arba ASTM D685) ir paruo\u0161ti pagal ma\u0161inos krypt\u012f ir gr\u016bd\u0173 orientacij\u0105.<\/p>\n\n\n\n<p>Rekomenduojame <strong data-start=\"4191\" data-end=\"4249\">Cell Instruments COF-01 trinties koeficiento testeris<\/strong>, didelio tikslumo horizontaliosios plok\u0161tumos prietaisas, sukurtas pagal ASTM D4917 ir ISO 8295 reikalavimus. Jame yra skaitmeninis valdymas, reguliuojamos rogut\u0117s ir automatinis j\u0117gos matavimas, u\u017etikrinantis tikslius ir atkuriamus statini\u0173 ir kinetini\u0173 COF bandym\u0173 rezultatus.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Paai\u0161kinti popieriaus statin\u0117s ir kinetin\u0117s trinties bandymai<\/h2>\n\n\n\n<p>Atliekant popieriaus bandymus pagal ASTM D4917, vienas popieriaus lapas dedamas ant lygaus horizontalaus pavir\u0161iaus, o ant jo dedamas kitas toks pat lapas. Ant vir\u0161utinio lapo u\u017ededamos rogut\u0117s (paprastai su guminiu pavir\u0161iumi). Traukiant rogutes matuojama j\u0117ga, reikalinga jud\u0117jimui prad\u0117ti (statin\u0117 trintis), ir j\u0117ga, reikalinga jud\u0117jimui t\u0119sti (kinetin\u0117 trintis).<\/p>\n\n\n\n<p>Tai <strong data-start=\"2334\" data-end=\"2368\">popieriaus kinetin\u0117s trinties bandymai<\/strong> ir <strong data-start=\"2373\" data-end=\"2406\">popieriaus statin\u0117s trinties bandymai<\/strong> pateikiami svarb\u016bs duomenys, padedantys suprasti lap\u0173 atskyrim\u0105, padavimo nuoseklum\u0105 ir spausdinimo i\u0161lyginim\u0105 didel\u0117s spartos sistemose.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">ASTM D4917 standarto taikymas spausdinimo ir nedengto popieriaus COF bandymams<\/h2>\n\n\n\n<p>The <strong data-start=\"2613\" data-end=\"2640\">spausdinimo popieriaus COF bandymas<\/strong> tai ypa\u010d svarbu spaudos cecho aplinkoje, kur trinties nuoseklumas u\u017etikrina vieno lapo padavimo tikslum\u0105 ir suma\u017eina u\u017esikirtim\u0173 ar klaiding\u0173 padavim\u0173 skai\u010di\u0173. Pana\u0161iai, <strong data-start=\"2799\" data-end=\"2826\">nepadengto popieriaus COF bandymas<\/strong> padeda popieriaus gamintojams patikrinti gaminio specifikacijas prie\u0161 j\u012f konvertuojant ar pristatant.<\/p>\n\n\n\n<p>Abiem atvejais ASTM D4917 standartas si\u016blo standartizuot\u0105 metod\u0105, kuris suma\u017eina bandym\u0173 nepastovum\u0105 ir u\u017etikrina atitikt\u012f pramon\u0117s kokyb\u0117s standartams.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Kod\u0117l verta naudoti ASTM D4917, o ne kitus metodus?<\/h2>\n\n\n\n<p>Skirtingai nuo nuo\u017eulnios plok\u0161tumos metod\u0173 (pvz., ASTM D4918), kuriais negalima nustatyti kinetin\u0117s COF, ASTM D4917 leid\u017eia tiksliai \u012fvertinti tiek statin\u0119, tiek kinetin\u0119 trint\u012f atliekant horizontalius judesius. Be to, taikant \u0161\u012f metod\u0105 suma\u017einamas slydimo nusid\u0117v\u0117jimas, nes bandymai atliekami tik pirmojo kontakto metu, tod\u0117l geriau imituojami real\u016bs lak\u0161t\u0173 tvarkymo scenarijai.<\/p>\n\n\n\n<p>Tvirtesn\u0117ms med\u017eiagoms, pavyzd\u017eiui, gofruotam kartonui, labiau tinka ASTM D4521 arba ASTM D3247. Ta\u010diau <strong data-start=\"3557\" data-end=\"3592\">plonas, lankstus, nepadengtas popierius.<\/strong>, D4917 - tai metodas, kur\u012f rekomenduoja dauguma popieriaus perdirb\u0117j\u0173 ir pakavimo laboratorij\u0173.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Tinkamo trinties koeficiento testerio pasirinkimas<\/h2>\n\n\n\n<p>Kad atitikt\u0173 ASTM D4917 standarto reikalavimus ir b\u016bt\u0173 gauti tiksl\u016bs popieriaus COF rezultatai, rekomenduojame naudoti <strong data-start=\"4239\" data-end=\"4270\">L\u0105steli\u0173 instrumentai <a href=\"https:\/\/www.packqc.com\/lt\/product\/coefficient-of-friction-testing-equipment\/\">COF-01<\/a> Testeris<\/strong>, kuris optimizuotas:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>horizontal\u016bs bandymai<\/li>\n\n\n\n<li>Statin\u0117s ir kinetin\u0117s trinties matavimai<\/li>\n\n\n\n<li>Nestandartini\u0173 laikikli\u0173, skirt\u0173 nedengtam ir specialiam popieriui, dizainas<\/li>\n\n\n\n<li>I\u0161manusis duomen\u0173 \u012fra\u0161ymas\u00a0<\/li>\n<\/ul>\n\n\n\n<p>\u2019Cell Instruments\" trinties testeriai, paremti patikima in\u017einerine ir taikom\u0105ja pagalba, u\u017etikrina tikslum\u0105 ir pakartojamum\u0105 \u012fvairiems popieriaus substratams.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Susisiekite su mumis Gaukite ASTM D4917 testavimo sprendim\u0105 <\/h2>\n\n\n\n<p>Popieriaus med\u017eiag\u0173 trinties charakteristikos daro didel\u0119 \u012ftak\u0105 spausdinimo, pakavimo ir perdirbimo operacijoms. <strong data-start=\"5267\" data-end=\"5281\">ASTM D4917<\/strong> pateikia standartizuot\u0105 ir patikim\u0105 sistem\u0105, skirt\u0105 nepadengto ra\u0161omojo ir spausdinimo popieriaus statinei ir kinetinei trin\u010diai matuoti. Naudojant tikslius prietaisus, pvz. <strong data-start=\"5448\" data-end=\"5478\">COF-01 pagal <a href=\"https:\/\/www.packqc.com\/lt\/\">L\u0105steli\u0173 instrumentai<\/a><\/strong>, kokyb\u0117s specialistai gali dr\u0105siai atlikti bandymus, interpretuoti rezultatus ir \u012fgyvendinti patobulinimus.<\/p>\n\n\n\n<p>Nesvarbu, ar testuojate <strong data-start=\"5608\" data-end=\"5634\">popieriaus kinetin\u0117 trintis<\/strong>, <strong data-start=\"5636\" data-end=\"5655\">statin\u0117 trintis<\/strong>, <strong data-start=\"5657\" data-end=\"5679\">spausdinimo popierius COF<\/strong>, arba atlikti <strong data-start=\"5698\" data-end=\"5725\">nepadengto popieriaus COF bandymas<\/strong>, ASTM D4917 standarto supratimas ir taikymas u\u017etikrina, kad j\u016bs\u0173 rezultatai b\u016bt\u0173 reik\u0161mingi, atkuriami ir suderinti su pasauliniais standartais.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">DUK<\/h2>\n\n\n\n<p><a tabindex=\"0\">1. K\u0105 matuoja ASTM D4917?<\/a><br>ASTM D4917 matuojamas nepadengto ra\u0161omojo ir spausdinimo popieriaus statin\u0117s ir kinetin\u0117s trinties koeficientas horizontalios plok\u0161tumos metodu.<\/p>\n\n\n\n<p><a tabindex=\"0\">2. Kod\u0117l popieriaus gaminiams svarbu atlikti trinties bandymus?<\/a><br>Trintis daro \u012ftak\u0105 spausdinimo ir kopijavimo ma\u0161in\u0173 padavimo patikimumui, taip pat u\u017etikrina tinkam\u0105 apdorojim\u0105 perdirbimo ir pakavimo ma\u0161inose.<\/p>\n\n\n\n<p><a tabindex=\"0\">3. Kuo statinis COF skiriasi nuo kinetinio COF?<\/a><br>Statinis COF matuoja j\u0117g\u0105, kuria pradedamas jud\u0117jimas tarp dviej\u0173 pavir\u0161i\u0173, o kinetinis COF matuoja j\u0117g\u0105, kuria t\u0119siamas jud\u0117jimas.<\/p>\n\n\n\n<p><a tabindex=\"0\">4. Gali <\/a><a href=\"https:\/\/store.astm.org\/d4917-97r07e01.html\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">ASTM D4917<\/a><a tabindex=\"0\"> galima naudoti dengtam ar specialiam popieriui?<\/a><br>Nors jis optimizuotas nedengtam ra\u0161omajam ir spausdinimo popieriui, ASTM D4917 gali b\u016bti naudojamas ir kit\u0173 r\u016b\u0161i\u0173 popieriui, ta\u010diau rezultatai gali skirtis tikslumu.<\/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\/lt\/wp-json\/wp\/v2\/standard\/9845","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.packqc.com\/lt\/wp-json\/wp\/v2\/standard"}],"about":[{"href":"https:\/\/www.packqc.com\/lt\/wp-json\/wp\/v2\/types\/standard"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.packqc.com\/lt\/wp-json\/wp\/v2\/media\/10018"}],"wp:attachment":[{"href":"https:\/\/www.packqc.com\/lt\/wp-json\/wp\/v2\/media?parent=9845"}],"wp:term":[{"taxonomy":"standard-category","embeddable":true,"href":"https:\/\/www.packqc.com\/lt\/wp-json\/wp\/v2\/standard-category?post=9845"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}