{"id":9311,"date":"2026-02-02T11:23:36","date_gmt":"2026-02-02T03:23:36","guid":{"rendered":"https:\/\/www.packqc.com\/applications\/tear-resistance-test-of-paper\/"},"modified":"2026-03-16T15:14:50","modified_gmt":"2026-03-16T07:14:50","slug":"tear-resistance-test-of-paper","status":"publish","type":"applications","link":"https:\/\/www.packqc.com\/cs\/applications\/tear-resistance-test-of-paper\/","title":{"rendered":"Zkou\u0161ka odolnosti pap\u00edru proti roztr\u017een\u00ed"},"content":{"rendered":"<p>The <strong data-start=\"398\" data-end=\"431\">zkou\u0161ka odolnosti pap\u00edru proti roztr\u017een\u00ed<\/strong> hraje z\u00e1sadn\u00ed roli p\u0159i hodnocen\u00ed odolnosti pap\u00edrov\u00fdch materi\u00e1l\u016f v\u016f\u010di trhac\u00edm sil\u00e1m p\u0159i zpracov\u00e1n\u00ed, tisku, balen\u00ed a kone\u010dn\u00e9m pou\u017eit\u00ed. Pap\u00edr s nedostate\u010dnou odolnost\u00ed proti roztr\u017een\u00ed m\u016f\u017ee p\u0159i zpracov\u00e1n\u00ed nebo manipulaci selhat, zat\u00edmco nadm\u011brn\u00e1 odolnost proti roztr\u017een\u00ed m\u016f\u017ee znamenat \u0161patnou pr\u016fchodnost. <a href=\"https:\/\/www.packqc.com\/cs\/standard\/astm-d689\/\"><strong data-start=\"715\" data-end=\"728\">ASTM D689<\/strong><\/a> zav\u00e1d\u00ed standardizovan\u00fd a v\u0161eobecn\u011b uzn\u00e1van\u00fd p\u0159\u00edstup k m\u011b\u0159en\u00ed <strong data-start=\"805\" data-end=\"836\">odolnost pap\u00edru proti roztr\u017een\u00ed<\/strong>, co\u017e umo\u017e\u0148uje v\u00fdrobc\u016fm, laborato\u0159\u00edm a odborn\u00edk\u016fm na kvalitu z\u00edskat konzistentn\u00ed a srovnateln\u00e9 v\u00fdsledky.<\/p>\n\n\n\n<p>Pou\u017eit\u00edm <strong data-start=\"963\" data-end=\"997\">Elmendorf\u016fv tester pevnosti v tahu<\/strong>, tato metoda kvantifikuje s\u00edlu pot\u0159ebnou k \u0161\u00ed\u0159en\u00ed trhliny v pap\u00edru za kontrolovan\u00fdch podm\u00ednek. V\u00fdsledky pom\u00e1haj\u00ed p\u0159edpov\u00eddat v\u00fdkon, porovn\u00e1vat druhy pap\u00edru a podporovat optimalizaci materi\u00e1lu.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Pro\u010d je test odolnosti pap\u00edru proti roztr\u017een\u00ed d\u016fle\u017eit\u00fd<\/h2>\n\n\n\n<p>The <strong data-start=\"1260\" data-end=\"1293\">zkou\u0161ka odolnosti pap\u00edru proti roztr\u017een\u00ed<\/strong> m\u011b\u0159\u00ed sp\u00ed\u0161e pevnost vnit\u0159n\u00ed vazby vl\u00e1ken ne\u017e povrchov\u00e9 vlastnosti. Na rozd\u00edl od zkou\u0161ky tahem, kter\u00e1 hodnot\u00ed odolnost proti tahu, odolnost proti roztr\u017een\u00ed odr\u00e1\u017e\u00ed, jak dob\u0159e vl\u00e1kna odol\u00e1vaj\u00ed \u0161\u00ed\u0159en\u00ed trhlin, jakmile se za\u010dnou trhat. D\u00edky tomuto rozd\u00edlu je norma ASTM D689 zvl\u00e1\u0161t\u011b cenn\u00e1 pro aplikace, kde pap\u00edr za\u017e\u00edv\u00e1 n\u00e1hl\u00e9 nam\u00e1h\u00e1n\u00ed, \u0159ez\u00e1n\u00ed nebo trh\u00e1n\u00ed.<\/p>\n\n\n\n<p>Pr\u016fmyslov\u00e1 odv\u011btv\u00ed se na tento test spol\u00e9haj\u00ed:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Posouzen\u00ed trvanlivosti p\u0159i zpracov\u00e1n\u00ed a balen\u00ed<\/li>\n\n\n\n<li>Porovn\u00e1n\u00ed kvality pap\u00edru v jednotliv\u00fdch v\u00fdrobn\u00edch d\u00e1vk\u00e1ch<\/li>\n\n\n\n<li>Podpora v\u00fdvoje produkt\u016f a v\u00fdb\u011bru materi\u00e1l\u016f<\/li>\n\n\n\n<li>Spln\u011bn\u00ed specifikac\u00ed z\u00e1kazn\u00edka a p\u0159edpis\u016f<\/li>\n<\/ul>\n\n\n\n<p>Vzhledem k prok\u00e1zan\u00e9mu v\u00fdznamu je norma ASTM D689 v \u00fazk\u00e9m souladu s dal\u0161\u00edmi glob\u00e1ln\u00edmi normami, jako jsou ISO 1974 a TAPPI T414.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">ASTM D689 a princip m\u011b\u0159en\u00ed Elmendorfova trh\u00e1n\u00ed<\/h2>\n\n\n\n<p><strong data-start=\"2090\" data-end=\"2103\">ASTM D689<\/strong> definuje <strong data-start=\"2114\" data-end=\"2147\">zkou\u0161ka odolnosti pap\u00edru proti roztr\u017een\u00ed<\/strong> na z\u00e1klad\u011b Elmendorfova principu. Metoda vyu\u017e\u00edv\u00e1 kyvadlo, kter\u00e9 p\u016fsob\u00ed rychlou trhac\u00ed silou kolmo k rovin\u011b pap\u00edru. Jak kyvadlo trh\u00e1 vzorek na pevn\u011b stanovenou vzd\u00e1lenost, ztr\u00e1c\u00ed potenci\u00e1ln\u00ed energii. Tato ztr\u00e1ta energie p\u0159\u00edmo souvis\u00ed s <strong data-start=\"2410\" data-end=\"2441\">odolnost pap\u00edru proti roztr\u017een\u00ed<\/strong>.<\/p>\n\n\n\n<p>An <strong data-start=\"2447\" data-end=\"2481\">Elmendorf\u016fv tester pevnosti v tahu<\/strong> p\u0159ev\u00e1d\u00ed tuto energii na hodnotu s\u00edly zobrazenou na kalibrovan\u00e9 stupnici. Pokud je testov\u00e1no v\u00edce vrstev dohromady, v\u00fdsledek p\u0159edstavuje pr\u016fm\u011brnou s\u00edlu na vrstvu, co\u017e zaji\u0161\u0165uje p\u0159esnost i u lehk\u00fdch nebo vysoce pevn\u00fdch pap\u00edr\u016f.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Tester pevnosti v tahu Elmendorf a shoda s normou ASTM D689<\/h2>\n\n\n\n<p>An <strong data-start=\"2779\" data-end=\"2813\">elmendorf\u016fv tester pevnosti v tahu<\/strong> navr\u017een\u00e9 pro ASTM D689 mus\u00ed zaji\u0161\u0165ovat stabiln\u00ed pohyb kyvadla, p\u0159esn\u00e9 upnut\u00ed a p\u0159esnou kalibraci stupnice. Spr\u00e1vn\u00e9 nastaven\u00ed p\u0159\u00edstroje zaji\u0161\u0165uje opakovateln\u00e9 a smyslupln\u00e9 v\u00fdsledky v oblasti <strong data-start=\"2997\" data-end=\"3030\">zkou\u0161ka odolnosti pap\u00edru proti roztr\u017een\u00ed<\/strong>.<\/p>\n\n\n\n<p>Modern\u00ed syst\u00e9my, jako je nap\u0159. <strong data-start=\"3061\" data-end=\"3100\">Cell Instruments SLD-01 Tester na trh\u00e1n\u00ed<\/strong>, podporuj\u00ed testov\u00e1n\u00ed podle normy ASTM D689 t\u00edm, \u017ee nab\u00edzej\u00ed:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Vysok\u00e1 mechanick\u00e1 stabilita pro konzistentn\u00ed trhac\u00ed \u00fa\u010dinek<\/li>\n\n\n\n<li>Jasn\u00e9 digit\u00e1ln\u00ed nebo analogov\u00e9 m\u011b\u0159en\u00ed s\u00edly<\/li>\n\n\n\n<li>Snadn\u00e9 nastaven\u00ed pro r\u016fzn\u00e9 druhy pap\u00edru a po\u010dty vrstev<\/li>\n\n\n\n<li>Spolehliv\u00fd v\u00fdkon v prost\u0159ed\u00ed kontroly kvality a v\u00fdzkumu a v\u00fdvoje<\/li>\n<\/ul>\n\n\n\n<p>V\u00fdb\u011br vyhovuj\u00edc\u00edho testeru p\u0159\u00edmo ovliv\u0148uje d\u016fv\u011bryhodnost testu a dlouhodobou spolehlivost dat.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Postup zkou\u0161ky odolnosti pap\u00edru proti roztr\u017een\u00ed krok za krokem<\/h2>\n\n\n\n<p>The <strong data-start=\"3534\" data-end=\"3567\">zkou\u0161ka odolnosti pap\u00edru proti roztr\u017een\u00ed<\/strong> podle normy ASTM D689 se \u0159\u00edd\u00ed strukturovan\u00fdm pracovn\u00edm postupem, kter\u00fd m\u00e1 sn\u00ed\u017eit variabilitu:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Vzorov\u00e1 klimatizace<br><\/strong>Vzorky pap\u00edru se kondicionuj\u00ed za standardn\u00edch atmosf\u00e9rick\u00fdch podm\u00ednek, aby se minimalizoval vliv vlhkosti a teploty.<\/li>\n\n\n\n<li><strong>P\u0159\u00edprava vzork\u016f<br><\/strong>Na z\u00e1klad\u011b pevnosti pap\u00edru se zvol\u00ed vhodn\u00fd po\u010det vrstev. C\u00edlem je dos\u00e1hnout hodnoty bl\u00edzk\u00e9 optim\u00e1ln\u00edmu rozsahu Elmendorfovy stupnice.<\/li>\n\n\n\n<li><strong>Nastaven\u00ed p\u0159\u00edstroje<br><\/strong>Elmendorf\u016fv tester pevnosti v tahu se vyrovn\u00e1, kyvadlo se zvedne do v\u00fdchoz\u00ed polohy a ukazatel se nastav\u00ed na nulu.<\/li>\n\n\n\n<li><strong>Up\u00edn\u00e1n\u00ed a p\u0159\u00edprava \u0161t\u011brbin<br><\/strong>Vzorek je ve svork\u00e1ch vycentrov\u00e1n a rovnom\u011brn\u011b zaji\u0161t\u011bn. Zavede se po\u010d\u00e1te\u010dn\u00ed \u0161t\u011brbina, aby se zajistila d\u016fsledn\u00e1 iniciace trh\u00e1n\u00ed.<\/li>\n\n\n\n<li><strong>Proveden\u00ed slz<br><\/strong>Kyvadlo se uvoln\u00ed a roztrhne pap\u00edr na ur\u010ditou vzd\u00e1lenost. Odolnost pap\u00edru proti roztr\u017een\u00ed se ur\u010d\u00ed ze ztr\u00e1ty energie kyvadla.<\/li>\n\n\n\n<li><strong>Zaznamen\u00e1v\u00e1n\u00ed v\u00fdsledk\u016f<br><\/strong>Zaznamen\u00e1 se \u00fadaj stupnice a po\u010det vrstev. Zkou\u0161ky se prov\u00e1d\u011bj\u00ed ve sm\u011bru stroje i v p\u0159\u00ed\u010dn\u00e9m sm\u011bru, je-li to vhodn\u00e9.<\/li>\n\n\n\n<li><strong>Ov\u011b\u0159ov\u00e1n\u00ed v\u00fdsledk\u016f<br><\/strong>Neplatn\u00e9 trh\u00e1n\u00ed, kter\u00e9 se odchyluje od po\u017eadovan\u00e9 cesty trh\u00e1n\u00ed, je odm\u00edtnuto, \u010d\u00edm\u017e je zachov\u00e1na integrita dat.<\/li>\n<\/ol>\n\n\n\n<p>Tento systematick\u00fd postup zaji\u0161\u0165uje, \u017ee v\u00fdsledky normy ASTM D689 p\u0159esn\u011b odr\u00e1\u017eej\u00ed odolnost proti vnit\u0159n\u00edmu roztr\u017een\u00ed.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Pochopen\u00ed a pou\u017e\u00edv\u00e1n\u00ed v\u00fdsledk\u016f zkou\u0161ek podle normy ASTM D689<\/h2>\n\n\n\n<p>V\u00fdsledky normy ASTM D689 p\u0159edstavuj\u00ed <strong data-start=\"4968\" data-end=\"4999\">odolnost pap\u00edru proti roztr\u017een\u00ed<\/strong> v jednotk\u00e1ch s\u00edly. Zpr\u00e1vy obvykle obsahuj\u00ed pr\u016fm\u011brn\u00e9, maxim\u00e1ln\u00ed a minim\u00e1ln\u00ed hodnoty pro ka\u017ed\u00fd testovan\u00fd sm\u011br. Tyto hodnoty pom\u00e1haj\u00ed u\u017eivatel\u016fm:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Objektivn\u00ed porovn\u00e1n\u00ed zn\u00e1mek pap\u00edru<\/li>\n\n\n\n<li>Sledov\u00e1n\u00ed konzistence v\u00fdroby<\/li>\n\n\n\n<li>P\u0159edv\u00edd\u00e1n\u00ed v\u00fdkonu kone\u010dn\u00e9ho pou\u017eit\u00ed<\/li>\n\n\n\n<li>Identifikace vlivu orientace vl\u00e1ken<\/li>\n<\/ul>\n\n\n\n<p>V kombinaci s tahov\u00fdmi zkou\u0161kami, zkou\u0161kami na roztr\u017een\u00ed nebo zkou\u0161kami na ohyb se m\u016f\u017ee <strong data-start=\"5336\" data-end=\"5369\">zkou\u0161ka odolnosti pap\u00edru proti roztr\u017een\u00ed<\/strong> p\u0159isp\u00edv\u00e1 ke komplexn\u00edmu pevnostn\u00edmu profilu.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Nej\u010dast\u011bj\u0161\u00ed dotazy<\/h2>\n\n\n\n<p>Ot\u00e1zka 1: Jak\u00fd je test odolnosti pap\u00edru proti roztr\u017een\u00ed?<\/p>\n\n\n\n<p>The <strong data-start=\"206\" data-end=\"239\">zkou\u0161ka odolnosti pap\u00edru proti roztr\u017een\u00ed<\/strong> m\u011b\u0159\u00ed s\u00edlu pot\u0159ebnou k roztr\u017een\u00ed listu pap\u00edru kontrolovanou metodou. Tato zkou\u0161ka hodnot\u00ed odolnost pap\u00edru a p\u0159edpov\u00edd\u00e1 jeho v\u00fdkonnost p\u0159i tisku, balen\u00ed a dal\u0161\u00edch aplikac\u00edch.<\/p>\n\n\n\n<p>Ot\u00e1zka 2: Jak\u00e9 typy pap\u00edru lze testovat pomoc\u00ed <a href=\"https:\/\/store.astm.org\/d0689-17r24.html\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">ASTM D689<\/a>?<\/p>\n\n\n\n<p>Norma je vhodn\u00e1 pro \u0161irokou \u0161k\u00e1lu pap\u00edr\u016f, v\u010detn\u011b tiskov\u00fdch a psac\u00edch pap\u00edr\u016f, obalov\u00fdch materi\u00e1l\u016f, pr\u016fmyslov\u00fdch list\u016f a nat\u00edran\u00fdch i nenat\u00edran\u00fdch pap\u00edr\u016f. Vysoce sm\u011brov\u00e9 pap\u00edry mohou vy\u017eadovat alternativn\u00ed zkou\u0161ky.<\/p>\n\n\n\n<p>Ot\u00e1zka 3: Jak funguje Elmendorf\u016fv tester pevnosti v roztr\u017een\u00ed?<\/p>\n\n\n\n<p>The <strong data-start=\"1039\" data-end=\"1073\">Elmendorf\u016fv tester pevnosti v tahu<\/strong> pou\u017e\u00edv\u00e1 kyvadlo k trh\u00e1n\u00ed pap\u00edru. Energie, kterou kyvadlo ztrat\u00ed, se p\u0159evede na \u00fadaj, kter\u00fd odr\u00e1\u017e\u00ed hodnotu <strong data-start=\"1185\" data-end=\"1216\">odolnost pap\u00edru proti roztr\u017een\u00ed<\/strong>. Modern\u00ed testery jako Cell Instruments SLD-01 poskytuj\u00ed p\u0159esn\u00e9 a opakovateln\u00e9 v\u00fdsledky.<\/p>\n\n\n\n<p>Ot\u00e1zka 4: Jak by m\u011bly b\u00fdt vzorky p\u0159ipraveny k testov\u00e1n\u00ed?<\/p>\n\n\n\n<p>Vzorky by m\u011bly b\u00fdt kondicionov\u00e1ny za standardn\u00edch atmosf\u00e9rick\u00fdch podm\u00ednek. Po\u010det vrstev se vol\u00ed na z\u00e1klad\u011b specifikac\u00ed v\u00fdrobku a vrstvy mus\u00ed b\u00fdt d\u016fsledn\u011b orientov\u00e1ny. Pro kontrolu iniciace trh\u00e1n\u00ed se zavede mal\u00e1 \u0161t\u011brbina.<\/p>\n\n\n\n<p><\/p>","protected":false},"excerpt":{"rendered":"<p>The tear resistance test of paper plays a critical role in evaluating how paper materials withstand tearing forces during converting, printing, packaging, and end use. Paper with insufficient tearing resistance may fail during processing or handling, while excessive tearing resistance can indicate poor runnability. ASTM D689 establishes a standardized and widely recognized approach for measuring [&hellip;]<\/p>","protected":false},"featured_media":8716,"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":""}}},"class_list":["post-9311","applications","type-applications","status-publish","has-post-thumbnail","hentry"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.packqc.com\/cs\/wp-json\/wp\/v2\/applications\/9311","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.packqc.com\/cs\/wp-json\/wp\/v2\/applications"}],"about":[{"href":"https:\/\/www.packqc.com\/cs\/wp-json\/wp\/v2\/types\/applications"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.packqc.com\/cs\/wp-json\/wp\/v2\/media\/8716"}],"wp:attachment":[{"href":"https:\/\/www.packqc.com\/cs\/wp-json\/wp\/v2\/media?parent=9311"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}