{"id":9872,"date":"2026-02-24T15:11:46","date_gmt":"2026-02-24T07:11:46","guid":{"rendered":"https:\/\/www.packqc.com\/standard\/astm-d1938-2\/"},"modified":"2026-04-16T09:53:05","modified_gmt":"2026-04-16T01:53:05","slug":"astm-d1938","status":"publish","type":"standard","link":"https:\/\/www.packqc.com\/ro\/standard\/astm-d1938\/","title":{"rendered":"ASTM D1938"},"content":{"rendered":"<h2 class=\"wp-block-heading\">Principiul testului de rupere a pantalonilor ASTM D1938<\/h2>\n\n\n\n<p>The <strong data-start=\"1385\" data-end=\"1401\">ruptur\u0103 de pantaloni<\/strong> definit\u0103 \u00een ASTM D1938 m\u0103soar\u0103 for\u021ba necesar\u0103 pentru propagarea unei singure rupturi printr-un specimen de film plastic. E\u0219antionul este preg\u0103tit cu o fant\u0103 central\u0103 care formeaz\u0103 dou\u0103 \u201cpicioare\u201d, asem\u0103n\u0103toare unei perechi de pantaloni. Fiecare picior este fixat \u00eentr-o ma\u0219in\u0103 de testare la trac\u021biune, iar m\u00e2nerele se separ\u0103 la o vitez\u0103 constant\u0103.<\/p>\n\n\n\n<p>\u00cen timpul testului, instrumentul \u00eenregistreaz\u0103 for\u021ba necesar\u0103 pentru a continua ruperea filmului pe o distan\u021b\u0103 definit\u0103. Aceast\u0103 for\u021b\u0103 reflect\u0103 <strong data-start=\"1862\" data-end=\"1893\">rezisten\u021b\u0103 la propagarea ruperii<\/strong>, care difer\u0103 de rezisten\u021ba la trac\u021biune sau de rezisten\u021ba la perforare. \u00cen practic\u0103, o pelicul\u0103 cu rezisten\u021b\u0103 ridicat\u0103 la trac\u021biune poate avea totu\u0219i rezultate slabe la un test de rupere a unei pelicule de plastic dac\u0103 ruperea se propag\u0103 u\u0219or odat\u0103 ini\u021biat\u0103.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">De ce este important\u0103 rezisten\u021ba la propagarea ruperii<\/h3>\n\n\n\n<p>\u00cen aplica\u021biile cu folii de plastic, rezisten\u021ba la rupere influen\u021beaz\u0103 at\u00e2t performan\u021ba, c\u00e2t \u0219i siguran\u021ba. Filmele de ambalare pentru alimente, produse farmaceutice \u0219i dispozitive medicale trebuie s\u0103 reziste ruperii \u00een timpul sigil\u0103rii, manipul\u0103rii \u0219i distribu\u021biei. Filmele agricole, foliile industriale \u0219i foliile de protec\u021bie se confrunt\u0103 cu cerin\u021be similare.<\/p>\n\n\n\n<p>The <strong data-start=\"2461\" data-end=\"2481\">Metoda de testare a ruperii<\/strong> descrise \u00een ASTM D1938 ajut\u0103 produc\u0103torii:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Compararea materialelor cu grosime \u0219i formulare similare<\/li>\n\n\n\n<li>Optimizarea structurilor de film pentru durabilitate<\/li>\n\n\n\n<li>Reducerea defec\u021biunilor produselor cauzate de ruperea necontrolat\u0103<\/li>\n\n\n\n<li>Sprijin pentru selectarea materialelor \u00een timpul dezvolt\u0103rii produsului<\/li>\n<\/ul>\n\n\n\n<p>Deoarece metoda se concentreaz\u0103 pe rezisten\u021ba la propagarea ruperii, aceasta furnizeaz\u0103 date care se coreleaz\u0103 bine cu multe moduri de defectare din lumea real\u0103.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Preg\u0103tirea epruvetelor \u0219i condi\u021biile de testare<\/h2>\n\n\n\n<p>ASTM D1938 specific\u0103 cerin\u021be stricte pentru dimensiunile epruvetelor, uniformitatea grosimii \u0219i condi\u021bionarea acestora. Preg\u0103tirea corespunz\u0103toare asigur\u0103 faptul c\u0103 rezultatele reflect\u0103 mai degrab\u0103 comportamentul materialului dec\u00e2t variabilitatea testului. E\u0219antioanele sunt de obicei testate at\u00e2t \u00een direc\u021bia ma\u0219inii, c\u00e2t \u0219i \u00een direc\u021bia transversal\u0103 pentru a surprinde propriet\u0103\u021bile anizotrope comune \u00een filmele extrudate.<\/p>\n\n\n\n<p>Condi\u021bionarea la temperatur\u0103 \u0219i umiditate controlate joac\u0103 un rol important \u00een consecven\u021ba rezultatelor. Filmele din plastic prezint\u0103 adesea sensibilitate la condi\u021biile de mediu, iar condi\u021bionarea standardizat\u0103 \u00eembun\u0103t\u0103\u021be\u0219te repetabilitatea \u00een toate laboratoarele.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Interpretarea rezultatelor testului de rupere a foliei de plastic<\/h2>\n\n\n\n<p>Rezultatul unui test ASTM D1938 este de obicei exprimat ca o for\u021b\u0103 medie de propagare a ruperii. Pentru foliile mai pu\u021bin extensibile, for\u021ba r\u0103m\u00e2ne relativ stabil\u0103 \u00een timpul ruperii. Filmele foarte extensibile pot prezenta valori fluctuante ale for\u021bei, ceea ce necesit\u0103 o interpretare atent\u0103 a curbei sarcin\u0103-extensie.<\/p>\n\n\n\n<p>Atunci c\u00e2nd se compar\u0103 materiale, este esen\u021bial s\u0103 se ia \u00een considerare grosimea, direc\u021bia \u0219i structura peliculei. Datele ASTM D1938 clasific\u0103 materialele \u00een mod eficient \u00een cadrul grupurilor similare, de\u0219i nu prezic \u00eentotdeauna performan\u021ba final\u0103 de utilizare.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">ASTM D1938 comparat cu alte metode de testare a ruperii<\/h2>\n\n\n\n<p>Exist\u0103 mai multe metode de testare a ruperii, inclusiv testele Elmendorf \u0219i de rupere a limbii. ASTM D1938 difer\u0103 prin accentul pus pe <strong data-start=\"4293\" data-end=\"4324\">rezisten\u021b\u0103 la propagarea ruperii<\/strong> \u00een condi\u021bii de separare controlat\u0103 a prinderii, mai degrab\u0103 dec\u00e2t prin m\u0103surarea for\u021bei de impact sau de v\u00e2rf. Pentru filmele din plastic \u0219i foliile sub\u021biri, aceast\u0103 abordare ofer\u0103 date mai relevante, \u00een special atunci c\u00e2nd filmele prezint\u0103 ruperi lente \u0219i continue \u00een timpul utiliz\u0103rii.<\/p>\n\n\n\n<p>Selectarea metodei corecte de testare a ruperii asigur\u0103 rezultate semnificative \u0219i evit\u0103 interpret\u0103rile gre\u0219ite \u00een timpul evalu\u0103rii calit\u0103\u021bii.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Solu\u021bii de testare de la Cell Instruments<\/h2>\n\n\n\n<p>Testarea precis\u0103 ASTM D1938 necesit\u0103 o stabilitate <a href=\"https:\/\/www.packqc.com\/ro\/product\/sale-packaging-tensile-strength-tester-film\/\" target=\"_blank\" rel=\"noopener\"><strong data-start=\"4777\" data-end=\"4795\">tester de trac\u021biune<\/strong><\/a> cu control precis al vitezei, m\u0103surare fiabil\u0103 a for\u021bei \u0219i m\u00e2nere adecvate pentru specimene de rupere a pantalonilor. <strong data-start=\"4899\" data-end=\"4919\">Instrumente celulare<\/strong> ofer\u0103 sisteme avansate de testare la trac\u021biune concepute pentru a \u00eendeplini cerin\u021bele ASTM D1938, suport\u00e2nd \u00een acela\u0219i timp o configura\u021bie flexibil\u0103 pentru diferite materiale de film.<\/p>\n\n\n\n<p>Dincolo de testarea standard, Cell Instruments suport\u0103, de asemenea, dispozitive personalizate, actualiz\u0103ri de automatizare \u0219i solu\u021bii de testare personalizate pentru produc\u0103torii de ambalaje, medicamente, produse farmaceutice \u0219i folii de plastic. Aceste capacit\u0103\u021bi ajut\u0103 laboratoarele s\u0103-\u0219i \u00eembun\u0103t\u0103\u021beasc\u0103 eficien\u021ba, fiabilitatea datelor \u0219i conformitatea cu standardele interna\u021bionale.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\n\t\t\t\tContacta\u021bi-ne Ob\u021bine\u021bi solu\u021bia de testare ASTM D1938\t\t\t\t<\/h2>\n\n\n\n<p>ASTM D1938 r\u0103m\u00e2ne un standard cheie pentru evaluarea <strong data-start=\"5469\" data-end=\"5500\">rezisten\u021b\u0103 la propagarea ruperii<\/strong> \u00een folii de plastic. Prin concentrarea pe modul \u00een care o lacrim\u0103 cre\u0219te \u00een condi\u021bii controlate, acest <strong data-start=\"5585\" data-end=\"5605\">Metoda de testare a ruperii<\/strong> ofer\u0103 date practice \u0219i comparabile pentru selectarea materialelor \u0219i controlul calit\u0103\u021bii. Cu ajutorul echipamentelor de testare fiabile \u0219i al expertizei tehnice de la Cell Instruments, produc\u0103torii pot evalua cu \u00eencredere performan\u021ba de rupere \u0219i pot spori durabilitatea produselor \u00een diverse aplica\u021bii.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">FAQ<\/h2>\n\n\n\n<p>1. Ce este standardul ASTM D1938?<br><strong data-start=\"176\" data-end=\"190\">ASTM D1938<\/strong> este o metod\u0103 de testare standard utilizat\u0103 pentru a m\u0103sura for\u021ba necesar\u0103 propag\u0103rii unei rupturi \u00een pelicule de plastic \u0219i folii sub\u021biri (grosime \u2264 1 mm) utiliz\u00e2nd o metod\u0103 de rupere unic\u0103. Aceast\u0103 metod\u0103 este esen\u021bial\u0103 pentru evaluarea rezisten\u021bei la propagarea ruperii foliilor din plastic, care este important\u0103 \u00een procesele de ambalare \u0219i de selec\u021bie a materialelor. Obiectivul principal al acestui test este de a m\u0103sura for\u021ba necesar\u0103 pentru ca o ruptur\u0103 s\u0103 se extind\u0103 de la o t\u0103iere ini\u021bial\u0103 a materialului.<\/p>\n\n\n\n<p>2. Ce este testul de rupere a pantalonilor?<br>The <strong data-start=\"680\" data-end=\"696\">ruptur\u0103 de pantaloni<\/strong> este o metod\u0103 descris\u0103 \u00een ASTM D1938. Acesta presupune t\u0103ierea unei fante \u201c\u00een form\u0103 de pantalon\u201d \u00eentr-un specimen de film, fixarea celor dou\u0103 \u201cpicioare\u201d ale fantei \u00een ma\u0219ina de testare \u0219i tragerea specimenului la o vitez\u0103 constant\u0103. For\u021ba necesar\u0103 pentru propagarea rupturii este m\u0103surat\u0103 \u00een timpul testului. Aceast\u0103 metod\u0103 ajut\u0103 la evaluarea u\u0219urin\u021bei cu care se poate r\u0103sp\u00e2ndi o ruptur\u0103 \u00een filmele de plastic supuse stresului.<\/p>\n\n\n\n<p>3. Prin ce difer\u0103 ASTM D1938 de alte metode de testare a ruperii?<br>ASTM D1938 se concentreaz\u0103 \u00een mod specific pe m\u0103surarea rezisten\u021bei la propagarea ruperii odat\u0103 ce ruperea a \u00eenceput deja, \u00een timp ce alte metode precum <strong data-start=\"1289\" data-end=\"1312\">Testul de rupere Elmendorf<\/strong> se concentreaz\u0103 pe for\u021ba necesar\u0103 pentru ini\u021bierea ruperii. Acest lucru face ca ASTM D1938 s\u0103 fie deosebit de util pentru foliile din plastic, deoarece simuleaz\u0103 procesul de rupere din lumea real\u0103, \u00een care o ruptur\u0103 \u00eencepe \u0219i se r\u0103sp\u00e2nde\u0219te pe material, \u00een loc s\u0103 testeze doar rezisten\u021ba materialului la ruperea ini\u021bial\u0103.<\/p>\n\n\n\n<p>4. La ce tipuri de filme se aplic\u0103 ASTM D1938?<br><a href=\"https:\/\/store.astm.org\/d1938-19.html?_gl=1*17uechj*_gcl_aw*R0NMLjE3Njg3ODk3MzcuQ2owS0NRaUFwckxMQmhDTUFSSXNBRURoZFBmZnpaMHVBMGMtdjB4RWdqR0hGSWVCaVZjeTJBM3RfRHV0ajduOVh3QlJuQUVlbGdZOU00TWFBcWlSRUFMd193Y0I.*_gcl_au*MTkwOTY2MzAwNC4xNzY1Nzc5ODUz\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">ASTM D1938<\/a> se aplic\u0103 filmelor din plastic \u0219i foliilor sub\u021biri cu o grosime de p\u00e2n\u0103 la 1 mm. Acest lucru este deosebit de important pentru foliile care au o grosime mai mic\u0103 de 0,25 mm (0,010 inci). Metoda de testare nu este adecvat\u0103 pentru foliile care prezint\u0103 rupturi fragile \u00een timpul test\u0103rii, iar metoda este special conceput\u0103 pentru materialele care nu se rup \u00een direc\u021bia transversal\u0103 \u00een timpul test\u0103rii.<\/p>","protected":false},"excerpt":{"rendered":"<p>ASTM D1938 Trouser Tear Test Principle The trouser tear method defined in ASTM D1938 measures the force required to propagate a single tear through a plastic film specimen. The specimen is prepared with a central slit that forms two \u201clegs,\u201d resembling a pair of trousers. Each leg is clamped into a tensile testing machine, and [&hellip;]<\/p>","protected":false},"featured_media":8743,"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":[611],"class_list":["post-9872","standard","type-standard","status-publish","has-post-thumbnail","hentry","standard-category-astm"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.packqc.com\/ro\/wp-json\/wp\/v2\/standard\/9872","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\/8743"}],"wp:attachment":[{"href":"https:\/\/www.packqc.com\/ro\/wp-json\/wp\/v2\/media?parent=9872"}],"wp:term":[{"taxonomy":"standard-category","embeddable":true,"href":"https:\/\/www.packqc.com\/ro\/wp-json\/wp\/v2\/standard-category?post=9872"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}