{"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\/sk\/standard\/astm-d4917\/","title":{"rendered":"ASTM D4917"},"content":{"rendered":"<h2 class=\"wp-block-heading\">Pochopenie koeficientu trenia pri testovan\u00ed papiera<\/h2>\n\n\n\n<p><strong data-start=\"1472\" data-end=\"1505\">Koeficient trenia (COF)<\/strong> je k\u013e\u00fa\u010dov\u00fd parameter, ktor\u00fd odr\u00e1\u017ea odpor pohybu medzi dvoma povrchmi. V aplik\u00e1ci\u00e1ch na papier t\u00e1to hodnota ovplyv\u0148uje sp\u00f4sob, ak\u00fdm sa jeden list pos\u00fava po druhom. Na str\u00e1nke . <strong data-start=\"1674\" data-end=\"1688\">statick\u00e9 COF<\/strong> ur\u010duje silu potrebn\u00fa na za\u010datie pohybu, zatia\u013e \u010do <strong data-start=\"1752\" data-end=\"1767\">kinetick\u00e9 COF<\/strong> meria silu potrebn\u00fa na udr\u017eanie pohybu pri kon\u0161tantnej r\u00fdchlosti. Norma ASTM D4917 umo\u017e\u0148uje obidve merania pomocou horizont\u00e1lneho posuvn\u00e9ho pohybu.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Testovacie zariadenie a pr\u00edprava vzoriek<\/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=\"Prebiehaj\u00faci test koeficientu trenia papiera\" 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>Na vykonanie spo\u013eahliv\u00fdch testov COF pod\u013ea normy ASTM D4917 je nevyhnutn\u00e9 \u0161pecializovan\u00e9 vybavenie. A <strong data-start=\"3843\" data-end=\"3877\">tester kon\u0161tantnej r\u00fdchlosti pohybu<\/strong>, vybaven\u00fd sn\u00edma\u010dom za\u0165a\u017eenia a schopn\u00fd \u0165aha\u0165 sane r\u00fdchlos\u0165ou 150 \u00b1 30 mm\/min.<\/p>\n\n\n\n<p>Na dosiahnutie presn\u00fdch v\u00fdsledkov by mali by\u0165 vzorky predkondicionovan\u00e9 za \u0161tandardn\u00fdch atmosf\u00e9rick\u00fdch podmienok (pod\u013ea TAPPI T402 alebo ASTM D685) a pripraven\u00e9 v s\u00falade so smerom stroja a orient\u00e1ciou zrna.<\/p>\n\n\n\n<p>Odpor\u00fa\u010dame <strong data-start=\"4191\" data-end=\"4249\">Cell Instruments COF-01 Tester koeficientu trenia<\/strong>, vysoko presn\u00fd horizont\u00e1lny rovinn\u00fd pr\u00edstroj navrhnut\u00fd tak, aby sp\u013a\u0148al po\u017eiadavky noriem ASTM D4917 a ISO 8295. Je vybaven\u00fd digit\u00e1lnym ovl\u00e1dan\u00edm, nastavite\u013en\u00fdmi mo\u017enos\u0165ami san\u00ed a automatick\u00fdm meran\u00edm sily - \u010do zabezpe\u010duje presn\u00e9 a reprodukovate\u013en\u00e9 v\u00fdsledky statick\u00fdch aj kinetick\u00fdch testov COF.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Vysvetlenie statick\u00e9ho a kinetick\u00e9ho testovania trenia papiera<\/h2>\n\n\n\n<p>Testovanie papiera pod\u013ea normy ASTM D4917 zah\u0155\u0148a polo\u017eenie jedn\u00e9ho listu papiera na rovn\u00fd vodorovn\u00fd povrch a polo\u017eenie \u010fal\u0161ieho rovnak\u00e9ho listu na\u0148. Nad vrchn\u00fd list sa polo\u017eia s\u00e1nky (zvy\u010dajne s gumovou podlo\u017ekou). Pri \u0165ahan\u00ed san\u00ed sa meria sila potrebn\u00e1 na za\u010datie pohybu (statick\u00e9 trenie) a sila potrebn\u00e1 na pokra\u010dovanie pohybu (kinetick\u00e9 trenie).<\/p>\n\n\n\n<p>Toto <strong data-start=\"2334\" data-end=\"2368\">testovanie kinetick\u00e9ho trenia papiera<\/strong> a <strong data-start=\"2373\" data-end=\"2406\">testovanie statick\u00e9ho trenia papiera<\/strong> poskytuje d\u00f4le\u017eit\u00e9 \u00fadaje na pochopenie oddelenia h\u00e1rkov, konzistencie pod\u00e1vania a zarovnania tla\u010de vo vysokor\u00fdchlostn\u00fdch syst\u00e9moch.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Aplik\u00e1cie normy ASTM D4917 pri testovan\u00ed COF tla\u010diarensk\u00e9ho a nenatieran\u00e9ho papiera<\/h2>\n\n\n\n<p>The <strong data-start=\"2613\" data-end=\"2640\">test COF tla\u010dov\u00e9ho papiera<\/strong> je obzvl\u00e1\u0161\u0165 d\u00f4le\u017eit\u00fd v prostred\u00ed tla\u010diarn\u00ed, kde trecia konzistencia zabezpe\u010duje presnos\u0165 pod\u00e1vania jednotliv\u00fdch listov a zni\u017euje zasek\u00e1vanie alebo chybn\u00e9 pod\u00e1vanie. Podobne, <strong data-start=\"2799\" data-end=\"2826\">test COF na nenatieranom papieri<\/strong> pom\u00e1ha v\u00fdrobcom papiera overi\u0165 \u0161pecifik\u00e1cie v\u00fdrobku pred konverziou alebo dod\u00e1vkou.<\/p>\n\n\n\n<p>V oboch pr\u00edpadoch norma ASTM D4917 pon\u00faka \u0161tandardizovan\u00fd pr\u00edstup, ktor\u00fd zni\u017euje variabilitu testovania a zabezpe\u010duje s\u00falad s priemyseln\u00fdmi normami kvality.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Pre\u010do pou\u017e\u00edva\u0165 ASTM D4917 namiesto in\u00fdch met\u00f3d?<\/h2>\n\n\n\n<p>Na rozdiel od met\u00f3d naklonenej roviny (napr. ASTM D4918), ktor\u00e9 nedok\u00e1\u017eu ur\u010di\u0165 kinetick\u00e9 COF, norma ASTM D4917 umo\u017e\u0148uje presn\u00e9 vyhodnotenie statick\u00e9ho aj kinetick\u00e9ho trenia prostredn\u00edctvom horizont\u00e1lneho pohybu. Okrem toho minimalizuje opotrebenie pri k\u013azan\u00ed t\u00fdm, \u017ee sa testuje len pri prvom kontakte, \u010do lep\u0161ie simuluje re\u00e1lne scen\u00e1re manipul\u00e1cie s plechmi.<\/p>\n\n\n\n<p>Pre tuh\u0161ie materi\u00e1ly, ako je vlnit\u00e1 lepenka, je vhodnej\u0161ia norma ASTM D4521 alebo ASTM D3247. Ale pre <strong data-start=\"3557\" data-end=\"3592\">tenk\u00e9, pru\u017en\u00e9, nenatieran\u00e9 papiere<\/strong>, D4917 je met\u00f3da, ktor\u00fa odpor\u00fa\u010da v\u00e4\u010d\u0161ina spracovate\u013eov papiera a baliacich laborat\u00f3ri\u00ed.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">V\u00fdber spr\u00e1vneho testera koeficientu trenia<\/h2>\n\n\n\n<p>Na dosiahnutie s\u00faladu s normou ASTM D4917 a presn\u00fdch v\u00fdsledkov COF na papieri odpor\u00fa\u010dame <strong data-start=\"4239\" data-end=\"4270\">Cell Instruments <a href=\"https:\/\/www.packqc.com\/sk\/product\/coefficient-of-friction-testing-equipment\/\">COF-01<\/a> Tester<\/strong>, ktor\u00fd je optimalizovan\u00fd pre:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>horizont\u00e1lne testovanie<\/li>\n\n\n\n<li>Merania statick\u00e9ho a kinetick\u00e9ho trenia<\/li>\n\n\n\n<li>Vlastn\u00fd dizajn pr\u00edpravkov pre nenatieran\u00e9 a \u0161peci\u00e1lne papiere<\/li>\n\n\n\n<li>Inteligentn\u00e9 zaznamen\u00e1vanie \u00fadajov\u00a0<\/li>\n<\/ul>\n\n\n\n<p>V\u010faka spo\u013eahlivej technickej a aplika\u010dnej podpore zabezpe\u010duj\u00fa testery trenia Cell Instruments presnos\u0165 a opakovate\u013enos\u0165 pri r\u00f4znych papierov\u00fdch substr\u00e1toch.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Kontaktujte n\u00e1s Z\u00edskajte rie\u0161enie na testovanie pod\u013ea normy ASTM D4917 <\/h2>\n\n\n\n<p>Trecie vlastnosti papierov\u00fdch materi\u00e1lov v\u00fdznamne ovplyv\u0148uj\u00fa v\u00fdkon v tla\u010diarensk\u00fdch, baliacich a spracovate\u013esk\u00fdch oper\u00e1ci\u00e1ch. <strong data-start=\"5267\" data-end=\"5281\">ASTM D4917<\/strong> poskytuje \u0161tandardizovan\u00fd, spo\u013eahliv\u00fd r\u00e1mec na meranie statick\u00e9ho aj kinetick\u00e9ho trenia nenatieran\u00e9ho papiera na p\u00edsanie a tla\u010d. S presn\u00fdmi pr\u00edstrojmi, ako je napr. <strong data-start=\"5448\" data-end=\"5478\">COF-01 od <a href=\"https:\/\/www.packqc.com\/sk\/\">Cell Instruments<\/a><\/strong>, m\u00f4\u017eu odborn\u00edci na kvalitu s istotou vykon\u00e1va\u0165 testy, interpretova\u0165 v\u00fdsledky a zav\u00e1dza\u0165 zlep\u0161enia.<\/p>\n\n\n\n<p>\u010ci u\u017e testujete <strong data-start=\"5608\" data-end=\"5634\">kinetick\u00e9 trenie papiera<\/strong>, <strong data-start=\"5636\" data-end=\"5655\">statick\u00e9 trenie<\/strong>, <strong data-start=\"5657\" data-end=\"5679\">tla\u010dov\u00fd papier COF<\/strong>, alebo vykon\u00e1vanie <strong data-start=\"5698\" data-end=\"5725\">test COF na nenatieranom papieri<\/strong>, pochopenie a uplat\u0148ovanie normy ASTM D4917 zabezpe\u010d\u00ed, \u017ee va\u0161e v\u00fdsledky bud\u00fa zmyslupln\u00e9, reprodukovate\u013en\u00e9 a v s\u00falade s glob\u00e1lnymi normami.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u010dasto kladen\u00e9 ot\u00e1zky<\/h2>\n\n\n\n<p><a tabindex=\"0\">1. \u010co meria norma ASTM D4917?<\/a><br>Pod\u013ea normy ASTM D4917 sa meria koeficient statick\u00e9ho a kinetick\u00e9ho trenia nenatieran\u00e9ho papiera na p\u00edsanie a tla\u010d pomocou met\u00f3dy horizont\u00e1lnej roviny.<\/p>\n\n\n\n<p><a tabindex=\"0\">2. Pre\u010do je testovanie trenia d\u00f4le\u017eit\u00e9 pre v\u00fdrobky z papiera?<\/a><br>Trenie ovplyv\u0148uje spo\u013eahlivos\u0165 pod\u00e1vania v tla\u010diar\u0148ach a kop\u00edrkach a zabezpe\u010duje spr\u00e1vnu manipul\u00e1ciu v spracovate\u013esk\u00fdch a baliacich strojoch.<\/p>\n\n\n\n<p><a tabindex=\"0\">3. Ako sa statick\u00e1 COF l\u00ed\u0161i od kinetickej COF?<\/a><br>Statick\u00e1 COF meria silu na za\u010datie pohybu medzi dvoma povrchmi, zatia\u013e \u010do kinetick\u00e1 COF meria silu na pokra\u010dovanie tohto pohybu.<\/p>\n\n\n\n<p><a tabindex=\"0\">4. M\u00f4\u017ee <\/a><a href=\"https:\/\/store.astm.org\/d4917-97r07e01.html\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">ASTM D4917<\/a><a tabindex=\"0\"> pou\u017e\u00edva\u0165 na natieran\u00e9 alebo \u0161peci\u00e1lne papiere?<\/a><br>Hoci je optimalizovan\u00e1 pre nenatieran\u00fd papier na p\u00edsanie a tla\u010d, norma ASTM D4917 sa m\u00f4\u017ee pou\u017e\u00edva\u0165 aj s in\u00fdmi typmi papiera, hoci v\u00fdsledky sa m\u00f4\u017eu l\u00ed\u0161i\u0165 v presnosti.<\/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\/sk\/wp-json\/wp\/v2\/standard\/9845","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.packqc.com\/sk\/wp-json\/wp\/v2\/standard"}],"about":[{"href":"https:\/\/www.packqc.com\/sk\/wp-json\/wp\/v2\/types\/standard"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.packqc.com\/sk\/wp-json\/wp\/v2\/media\/10018"}],"wp:attachment":[{"href":"https:\/\/www.packqc.com\/sk\/wp-json\/wp\/v2\/media?parent=9845"}],"wp:term":[{"taxonomy":"standard-category","embeddable":true,"href":"https:\/\/www.packqc.com\/sk\/wp-json\/wp\/v2\/standard-category?post=9845"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}