{"id":9867,"date":"2026-02-24T15:11:46","date_gmt":"2026-02-24T07:11:46","guid":{"rendered":"https:\/\/www.packqc.com\/standard\/iso-1974-2\/"},"modified":"2026-04-16T09:54:21","modified_gmt":"2026-04-16T01:54:21","slug":"iso-1974","status":"publish","type":"standard","link":"https:\/\/www.packqc.com\/ro\/standard\/iso-1974\/","title":{"rendered":"ISO 1974"},"content":{"rendered":"<h2 class=\"wp-block-heading\">Cum define\u0219te ISO 1974 rezisten\u021ba la rupere<\/h2>\n\n\n\n<p>Standardul descrie o secven\u021b\u0103 \u00een care operatorul plaseaz\u0103 patru foi suprapuse \u00eentr-un <a href=\"https:\/\/www.packqc.com\/ro\/products\/sld-01-elmendorf-tear-strength-tester\/\" target=\"_blank\" rel=\"noreferrer noopener\">Tester pendul Elmendorf<\/a>, introduce o t\u0103iere ini\u021bial\u0103 \u0219i permite pendulului s\u0103 se rup\u0103 pe o distan\u021b\u0103 definit\u0103. Metoda <strong data-start=\"1636\" data-end=\"1667\">energia pierdut\u0103 de pendul<\/strong> reprezint\u0103 munca necesar\u0103 pentru propagarea ruperii. De aici, laboratoarele calculeaz\u0103 for\u021ba medie de rupere pe foaie.<\/p>\n\n\n\n<p>Standardul se aplic\u0103 \u00een principal h\u00e2rtiei \u0219i pl\u0103cilor u\u0219oare a c\u0103ror rezisten\u021b\u0103 la rupere se \u00eencadreaz\u0103 \u00een gama de capacit\u0103\u021bi a instrumentelor de tip Elmendorf. ISO 1974 recomand\u0103 selectarea unei capacit\u0103\u021bi a pendulului care s\u0103 asigure c\u0103 citirile r\u0103m\u00e2n \u00eentre 20% \u0219i 80% din scara testerului, maximiz\u00e2nd precizia \u0219i repetabilitatea.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">De ce conteaz\u0103 rezisten\u021ba la rupere<\/h2>\n\n\n\n<p>Rezisten\u021ba la rupere a h\u00e2rtiei influen\u021beaz\u0103 \u00een mod direct performan\u021ba de conversie, integritatea ambalajului \u0219i durabilitatea utiliz\u0103rii finale. O rezisten\u021b\u0103 insuficient\u0103 duce adesea la ruperea benzii, la o rulare slab\u0103 sau la reclama\u021bii din partea consumatorilor. \u00cen schimb, o rezisten\u021b\u0103 excesiv\u0103 poate \u00eempiedica opera\u021bii cum ar fi elementele de deschidere, crestarea sau perforarea. ISO 1974 ofer\u0103 un cadru de m\u0103surare fiabil care ajut\u0103 la echilibrarea acestor cerin\u021be.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Principiile cheie ale metodei de rupere Elmendorf<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Propagarea controlat\u0103 a lacrimilor<\/h3>\n\n\n\n<p>ISO 1974 utilizeaz\u0103 un <strong data-start=\"2649\" data-end=\"2669\">linie lacrim\u0103 unic\u0103<\/strong> creat dup\u0103 fixarea ferm\u0103 a foilor stivuite. Prin standardizarea num\u0103rului de foi, a distan\u021bei de rupere \u0219i a mi\u0219c\u0103rii pendulului, testul izoleaz\u0103 proprietatea de rupere mai degrab\u0103 dec\u00e2t influen\u021ba tehnicii operatorului.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Pendulul \u0219i selectarea masei<\/h3>\n\n\n\n<p>Valoarea ruperii trebuie s\u0103 se \u00eencadreze \u00een intervalul de func\u021bionare recomandat. Lucrul \u00een afara intervalului cre\u0219te incertitudinea testului. Instrumentele moderne simplific\u0103 aceast\u0103 selec\u021bie cu mase pendulare modulare sau recunoscute automat.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Calitatea datelor \u0219i raportarea<\/h3>\n\n\n\n<p>ISO 1974 solicit\u0103 raportarea separat\u0103 a rezisten\u021bei la rupere \u00een ambele direc\u021bii, inclusiv a coeficientului de varia\u021bie. Sistemele digitale de raportare ajut\u0103 echipele s\u0103 reduc\u0103 erorile de transcriere, s\u0103 p\u0103streze trasabilitatea \u0219i s\u0103 accelereze analiza cauzelor principale \u00een timpul investiga\u021biilor privind calitatea.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Alegerea testerului Elmendorf potrivit de la Cell Instruments<\/h2>\n\n\n\n<p>Laboratoarele de h\u00e2rtie \u0219i ambalaje vizeaz\u0103 instrumente care ofer\u0103 <strong data-start=\"4698\" data-end=\"4743\">precizie, durabilitate \u0219i asigurarea datelor<\/strong>. Testerul de rupere Cell Instruments SLD-01 se aliniaz\u0103 \u00eendeaproape cu a\u0219tept\u0103rile opera\u021bionale stabilite de ISO 1974 \u0219i consolideaz\u0103 eficien\u021ba fluxului de lucru al laboratorului.<\/p>\n\n\n\n<p>Principalele avantaje includ:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong data-start=\"4937\" data-end=\"4959\">Fixare pneumatic\u0103<\/strong> care asigur\u0103 prinderea uniform\u0103 a tuturor pieselor de testare, \u00eembun\u0103t\u0103\u021bind repetabilitatea.<\/li>\n\n\n\n<li><strong data-start=\"5043\" data-end=\"5073\">Declan\u0219are automat\u0103 a pendulului<\/strong>, elimin\u00e2nd erorile de sincronizare ale operatorului care compromit adesea testerele manuale tradi\u021bionale.<\/li>\n\n\n\n<li><strong data-start=\"5164\" data-end=\"5196\">Capacit\u0103\u021bi multiple ale pendulului<\/strong> care acoper\u0103 h\u00e2rtii u\u0219oare p\u00e2n\u0103 la cele grele, permi\u021b\u00e2nd unui singur instrument s\u0103 suporte o gam\u0103 larg\u0103 de teste.<\/li>\n\n\n\n<li><strong data-start=\"5287\" data-end=\"5347\">Control PLC de nivel industrial cu navigare pe ecran tactil<\/strong>, ceea ce reduce timpul de instruire \u0219i spore\u0219te productivitatea.<\/li>\n\n\n\n<li><strong data-start=\"5408\" data-end=\"5464\">Ie\u0219ire op\u021bional\u0103 de tip tear-index \u0219i software profesional<\/strong>, sprijinind standardele \u00een domeniul celulozei \u0219i h\u00e2rtiei \u0219i raportarea avansat\u0103.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">\u00centreb\u0103ri frecvente despre ISO 1974<\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Ce este ISO 1974?<br>ISO 1974 este standardul interna\u021bional care define\u0219te metoda Elmendorf pentru determinarea rezisten\u021bei la rupere a h\u00e2rtiei \u0219i a pl\u0103cilor u\u0219oare. Acesta ofer\u0103 o procedur\u0103 unificat\u0103 pentru m\u0103surarea for\u021bei necesare propag\u0103rii unei rupturi printr-o prob\u0103.<\/li>\n\n\n\n<li>Ce indic\u0103 rezisten\u021ba la rupere cu privire la calitatea h\u00e2rtiei?<br>O rezisten\u021b\u0103 mai mare la rupere indic\u0103, \u00een general, o leg\u0103tur\u0103 mai puternic\u0103 a fibrelor \u0219i o integritate structural\u0103 mai bun\u0103. Valorile sc\u0103zute pot duce la probleme de prelucrare, la o execu\u021bie slab\u0103 sau la e\u0219ecuri ale produsului \u00een aplica\u021biile de ambalare.<\/li>\n\n\n\n<li>Ce materiale pot fi testate folosind ISO 1974?<br>ISO 1974 se aplic\u0103 majorit\u0103\u021bii tipurilor de h\u00e2rtie \u0219i panouri u\u0219oare a c\u0103ror rezisten\u021b\u0103 la rupere se \u00eencadreaz\u0103 \u00een intervalul de pendulare selectat al unui aparat de testare a ruperii Elmendorf.<\/li>\n\n\n\n<li>C\u00e2te foi sunt necesare pentru fiecare prob\u0103 \u00een conformitate cu ISO 1974?<br>Standardul prevede patru foi suprapuse pentru fiecare eprubet\u0103. Cu toate acestea, atunci c\u00e2nd este necesar, pot fi utilizate mai multe sau mai pu\u021bine foi, cu condi\u021bia ca aceast\u0103 abatere s\u0103 fie men\u021bionat\u0103 \u00een mod clar \u00een raportul de \u00eencercare.<\/li>\n\n\n\n<li>De ce ISO 1974 solicit\u0103 m\u0103sur\u0103tori at\u00e2t \u00een direc\u021bia ma\u0219inii, c\u00e2t \u0219i \u00een direc\u021bia transversal\u0103?<br>H\u00e2rtia prezint\u0103 anizotropie datorit\u0103 orient\u0103rii fibrelor \u00een timpul fabrica\u021biei. Testarea ambelor direc\u021bii asigur\u0103 o \u00een\u021belegere complet\u0103 a comportamentului materialului \u0219i ajut\u0103 la diagnosticarea neconcordan\u021belor de produc\u021bie.<\/li>\n\n\n\n<li>Ce factori pot cauza rezultate invalide \u00een testul de rupere Elmendorf?<br>Selectarea necorespunz\u0103toare a pendulului, abaterea extrem\u0103 a ruperii, ruperea incomplet\u0103, influen\u021ba operatorului, foile curbate sau citirile care se \u00eencadreaz\u0103 \u00een afara a 20-80% din intervalul de m\u0103surare pot necesita respingerea sau retestarea.<\/li>\n\n\n\n<li>Cum se calculeaz\u0103 indicele de rupere conform ISO 1974?<br>Indicele de rupere normalizeaz\u0103 rezisten\u021ba la rupere \u00een func\u021bie de gramaj folosind formula<br>X = F \/ g,<br>unde F este rezisten\u021ba la rupere pe foaie, iar g este greutatea de baz\u0103 \u00een grame pe metru p\u0103trat. Este util pentru compararea h\u00e2rtiilor cu gramaje diferite.<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">\n\t\t\t\tContacta\u021bi-ne pentru a ob\u021bine solu\u021bia de testare ISO 1974\t\t\t\t<\/h2>\n\n\n\n<p><strong><a href=\"https:\/\/www.iso.org\/standard\/52430.html\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">ISO 1974<\/a><\/strong> ofer\u0103 o metodologie robust\u0103 care ajut\u0103 produc\u0103torii \u0219i laboratoarele s\u0103 cuantifice rezisten\u021ba la rupere a h\u00e2rtiei cu acurate\u021be \u0219i comparabilitate. Prin cuplarea principiilor standardului cu instrumente de \u00eenalt\u0103 precizie, cum ar fi <strong data-start=\"6855\" data-end=\"6897\">Cell Instruments SLD-01 Tester de rupere<\/strong>, organiza\u021biile pot \u00eembun\u0103t\u0103\u021bi asigurarea calit\u0103\u021bii, stabiliza produc\u021bia \u0219i consolida \u00eencrederea \u00een materialele lor.<\/p>","protected":false},"excerpt":{"rendered":"<p>Cum define\u0219te ISO 1974 rezisten\u021ba la rupere Standardul descrie o secven\u021b\u0103 \u00een care operatorul plaseaz\u0103 patru foi suprapuse \u00eentr-un aparat de testare cu pendul Elmendorf, introduce o t\u0103iere ini\u021bial\u0103 \u0219i permite pendulului s\u0103 se rup\u0103 pe o distan\u021b\u0103 definit\u0103. Energia pierdut\u0103 de pendul reprezint\u0103 munca necesar\u0103 pentru propagarea ruperii. De aici, laboratoarele [...]<\/p>","protected":false},"featured_media":8547,"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":[612],"class_list":["post-9867","standard","type-standard","status-publish","has-post-thumbnail","hentry","standard-category-iso"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.packqc.com\/ro\/wp-json\/wp\/v2\/standard\/9867","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.packqc.com\/ro\/wp-json\/wp\/v2\/standard"}],"about":[{"href":"https:\/\/www.packqc.com\/ro\/wp-json\/wp\/v2\/types\/standard"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.packqc.com\/ro\/wp-json\/wp\/v2\/media\/8547"}],"wp:attachment":[{"href":"https:\/\/www.packqc.com\/ro\/wp-json\/wp\/v2\/media?parent=9867"}],"wp:term":[{"taxonomy":"standard-category","embeddable":true,"href":"https:\/\/www.packqc.com\/ro\/wp-json\/wp\/v2\/standard-category?post=9867"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}