{"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\/lv\/standard\/astm-d1938\/","title":{"rendered":"ASTM D1938"},"content":{"rendered":"<h2 class=\"wp-block-heading\">ASTM D1938 bik\u0161u pl\u012bsuma testa princips<\/h2>\n\n\n\n<p>The <strong data-start=\"1385\" data-end=\"1401\">bik\u0161u pl\u012bsums<\/strong> ASTM D1938 defin\u0113t\u0101 metode nosaka sp\u0113ku, kas nepiecie\u0161ams, lai plastmasas pl\u0113ves paraug\u0101 izplat\u012btos viens pl\u012bsums. Paraugu sagatavo ar centr\u0101lo spraugu, kas veido divas \"k\u0101jas\", l\u012bdz\u012bgi k\u0101 bikses. Katru k\u0101ju iestiprina stiepes test\u0113\u0161anas iek\u0101rt\u0101, un rokturi atdal\u0101s ar nemain\u012bgu \u0101trumu.<\/p>\n\n\n\n<p>Testa laik\u0101 instruments re\u0123istr\u0113 sp\u0113ku, kas nepiecie\u0161ams, lai turpin\u0101tu pl\u0113ves pl\u0113\u0161anu noteikt\u0101 att\u0101lum\u0101. \u0160is sp\u0113ks atspogu\u013co materi\u0101la <strong data-start=\"1862\" data-end=\"1893\">iztur\u012bba pret pl\u012bsumu izplat\u012b\u0161anos<\/strong>, kas at\u0161\u0137iras no stiepes iztur\u012bbas vai iztur\u012bbas pret caurdur\u0161anu. Praks\u0113 pl\u0113ve ar augstu stiepes iztur\u012bbu joproj\u0101m var uzr\u0101d\u012bt sliktus rezult\u0101tus plastmasas pl\u0113ves pl\u012bsuma test\u0101, ja pl\u0113ve viegli izplat\u0101s, tikl\u012bdz t\u0101 ir s\u0101kusies.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">K\u0101p\u0113c ir svar\u012bga pretest\u012bba pret pl\u012bsumu izplat\u012b\u0161anos<\/h3>\n\n\n\n<p>P\u0101rtikas, farmaceitisko produktu un medic\u012bnas ier\u012b\u010du iepakojuma pl\u0113v\u0113m j\u0101b\u016bt iztur\u012bg\u0101m pret pl\u012bsumiem aizz\u012bmogo\u0161anas, apstr\u0101des un izplat\u012b\u0161anas laik\u0101. L\u012bdz\u012bgas pras\u012bbas tiek izvirz\u012btas ar\u012b lauksaimniec\u012bbas pl\u0113v\u0113m, r\u016bpnieciskajiem oder\u0113jumiem un aizsargpl\u0113v\u0113m.<\/p>\n\n\n\n<p>The <strong data-start=\"2461\" data-end=\"2481\">asaru testa metode<\/strong> ASTM D1938 aprakst\u012btais pal\u012bdz ra\u017eot\u0101jiem:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Sal\u012bdzin\u0101t materi\u0101lus ar l\u012bdz\u012bgu biezumu un sast\u0101vu<\/li>\n\n\n\n<li>Pl\u0113ves strukt\u016bras optimiz\u0113\u0161ana iztur\u012bbai<\/li>\n\n\n\n<li>Samazin\u0101t nekontrol\u0113tas pl\u012bsumu izrais\u012btas izstr\u0101d\u0101jumu k\u013c\u016bmes.<\/li>\n\n\n\n<li>Atbalsts materi\u0101lu izv\u0113lei produktu izstr\u0101des laik\u0101<\/li>\n<\/ul>\n\n\n\n<p>T\u0101 k\u0101 \u0161\u012b metode koncentr\u0113jas uz iztur\u012bbu pret pl\u012bsumu izplat\u012b\u0161anos, t\u0101 sniedz datus, kas labi korel\u0113 ar daudziem re\u0101l\u0101s pasaules boj\u0101jumu veidiem.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Paraugu sagatavo\u0161ana un test\u0113\u0161anas apst\u0101k\u013ci<\/h2>\n\n\n\n<p>ASTM D1938 nosaka stingras pras\u012bbas attiec\u012bb\u0101 uz paraugu izm\u0113riem, biezuma viendab\u012bgumu un kondicion\u0113\u0161anu. Pareiza sagatavo\u0161ana nodro\u0161ina, ka rezult\u0101ti atspogu\u013co materi\u0101la uzved\u012bbu, nevis testa main\u012bgumu. Paraugus parasti test\u0113 gan ma\u0161\u012bnas virzien\u0101, gan \u0161\u0137\u0113rsvirzien\u0101, lai aptvertu ekstrud\u0113t\u0101m pl\u0113v\u0113m rakstur\u012bg\u0101s anizotrop\u0101s \u012bpa\u0161\u012bbas.<\/p>\n\n\n\n<p>Kondicion\u0113\u0161anai kontrol\u0113t\u0101 temperat\u016br\u0101 un mitrum\u0101 ir liela noz\u012bme rezult\u0101tu konsekvences nodro\u0161in\u0101\u0161an\u0101. Plastmasas pl\u0113ves bie\u017ei vien ir jut\u012bgas pret vides apst\u0101k\u013ciem, un standartiz\u0113ta kondicion\u0113\u0161ana uzlabo rezult\u0101tu atk\u0101rtojam\u012bbu da\u017e\u0101d\u0101s laboratorij\u0101s.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Plastmasas pl\u0113ves pl\u0113ves pl\u012b\u0161anas testa rezult\u0101tu interpret\u0113\u0161ana<\/h2>\n\n\n\n<p>ASTM D1938 testa rezult\u0101ts parasti tiek izteikts k\u0101 vid\u0113jais pl\u012bsuma izplat\u012b\u0161an\u0101s sp\u0113ks. Maz\u0101k izstiepjam\u0101m pl\u0113v\u0113m sp\u0113ks pl\u012b\u0161anas laik\u0101 saglab\u0101jas relat\u012bvi stabils. \u013boti stiepjamas pl\u0113ves var uzr\u0101d\u012bt sv\u0101rst\u012bgas sp\u0113ka v\u0113rt\u012bbas, t\u0101p\u0113c slodzes un stiepes l\u012bkne ir r\u016bp\u012bgi j\u0101interpret\u0113.<\/p>\n\n\n\n<p>Sal\u012bdzinot materi\u0101lus, ir svar\u012bgi \u0146emt v\u0113r\u0101 biezumu, virzienu un pl\u0113ves strukt\u016bru. ASTM D1938 dati efekt\u012bvi klasific\u0113 materi\u0101lus l\u012bdz\u012bg\u0101s grup\u0101s, lai gan tie ne vienm\u0113r pa\u0161i par sevi \u013cauj prognoz\u0113t gal\u012bg\u0101s lieto\u0161anas \u012bpa\u0161\u012bbas.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">ASTM D1938 sal\u012bdzin\u0101jum\u0101 ar cit\u0101m pl\u012bsumu test\u0113\u0161anas metod\u0113m<\/h2>\n\n\n\n<p>Past\u0101v vair\u0101kas asaru testa metodes, tostarp Elmendorfa un m\u0113les asaru tests. ASTM D1938 at\u0161\u0137iras ar to, ka uzsvars tiek likts uz <strong data-start=\"4293\" data-end=\"4324\">iztur\u012bba pret pl\u012bsumu izplat\u012b\u0161anos<\/strong> kontrol\u0113tas satv\u0113riena atdal\u012b\u0161anas, nevis trieciena vai maksim\u0101l\u0101 sp\u0113ka m\u0113r\u012b\u0161anas apst\u0101k\u013cos. Attiec\u012bb\u0101 uz plastmasas pl\u0113v\u0113m un pl\u0101n\u0101m loksn\u0113m \u0161\u012b pieeja sniedz atbilsto\u0161\u0101kus datus, jo \u012bpa\u0161i, ja pl\u0113v\u0113m ekspluat\u0101cijas laik\u0101 notiek l\u0113na, nep\u0101rtraukta pl\u012bsumi.<\/p>\n\n\n\n<p>Pareizas asaru testa metodes izv\u0113le nodro\u0161ina noz\u012bm\u012bgus rezult\u0101tus un nov\u0113r\u0161 nepareizu interpret\u0101ciju kvalit\u0101tes nov\u0113rt\u0113\u0161anas laik\u0101.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Cell Instruments test\u0113\u0161anas risin\u0101jumi<\/h2>\n\n\n\n<p>Lai veiktu prec\u012bzu ASTM D1938 test\u0113\u0161anu, ir nepiecie\u0161ama stabila <a href=\"https:\/\/www.packqc.com\/lv\/product\/sale-packaging-tensile-strength-tester-film\/\" target=\"_blank\" rel=\"noopener\"><strong data-start=\"4777\" data-end=\"4795\">stiepes testeris<\/strong><\/a> ar prec\u012bzu \u0101truma kontroli, uzticamu sp\u0113ka m\u0113r\u012b\u0161anu un piem\u0113rotiem satv\u0113rieniem bik\u0161u pl\u012bsuma paraugiem. <strong data-start=\"4899\" data-end=\"4919\">\u0160\u016bnu instrumenti<\/strong> nodro\u0161ina modernas stiepes test\u0113\u0161anas sist\u0113mas, kas izstr\u0101d\u0101tas, lai atbilstu ASTM D1938 pras\u012bb\u0101m, vienlaikus nodro\u0161inot elast\u012bgu konfigur\u0101ciju da\u017e\u0101diem pl\u0113ves materi\u0101liem.<\/p>\n\n\n\n<p>Papildus standarta test\u0113\u0161anai Cell Instruments atbalsta ar\u012b piel\u0101gotus \u0137erme\u0146us, automatiz\u0101cijas uzlabojumus un piel\u0101gotus test\u0113\u0161anas risin\u0101jumus iepakojuma, medic\u012bnas, farm\u0101cijas un plastmasas pl\u0113vju ra\u017eot\u0101jiem. \u0160\u012bs iesp\u0113jas pal\u012bdz laboratorij\u0101m uzlabot efektivit\u0101ti, datu uzticam\u012bbu un atbilst\u012bbu starptautiskajiem standartiem.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\n\t\t\t\tSazinieties ar mums Ieg\u016bstiet ASTM D1938 test\u0113\u0161anas risin\u0101jumu\t\t\t\t<\/h2>\n\n\n\n<p>ASTM D1938 joproj\u0101m ir galvenais standarts, lai nov\u0113rt\u0113tu <strong data-start=\"5469\" data-end=\"5500\">iztur\u012bba pret pl\u012bsumu izplat\u012b\u0161anos<\/strong> plastmasas pl\u0113v\u0113s. Koncentr\u0113joties uz to, k\u0101 asara aug kontrol\u0113tos apst\u0101k\u013cos. <strong data-start=\"5585\" data-end=\"5605\">asaru testa metode<\/strong> sniedz praktiskus, sal\u012bdzin\u0101mus datus materi\u0101lu izv\u0113lei un kvalit\u0101tes kontrolei. Izmantojot uzticamu test\u0113\u0161anas apr\u012bkojumu un Cell Instruments tehnisk\u0101s zin\u0101\u0161anas, ra\u017eot\u0101ji var dro\u0161i nov\u0113rt\u0113t pl\u012bsumu veiktsp\u0113ju un uzlabot izstr\u0101d\u0101jumu iztur\u012bbu da\u017e\u0101dos lietojumos.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">FAQ<\/h2>\n\n\n\n<p>1. Kas ir ASTM D1938 standarts?<br><strong data-start=\"176\" data-end=\"190\">ASTM D1938<\/strong> ir standarta testa metode, ko izmanto, lai izm\u0113r\u012btu sp\u0113ku, kas nepiecie\u0161ams pl\u0113ves un pl\u0101nas pl\u0113ves (biezums \u2264 1 mm) pl\u012bsuma izplat\u012b\u0161anai, izmantojot vienreiz\u0113jas pl\u012b\u0161anas metodi. \u0160\u012b metode ir \u013coti svar\u012bga, lai nov\u0113rt\u0113tu plastmasas pl\u0113vju iztur\u012bbu pret pl\u012bsuma izplat\u012b\u0161anos, kas ir svar\u012bgi iepako\u0161anas un materi\u0101lu izv\u0113les procesos. \u0160\u012b testa galvenais m\u0113r\u0137is ir izm\u0113r\u012bt sp\u0113ku, kas vajadz\u012bgs, lai pl\u012bsums no s\u0101kotn\u0113j\u0101 materi\u0101la griezuma izplat\u012btos.<\/p>\n\n\n\n<p>2. Kas ir bik\u0161u pl\u012bsuma tests?<br>The <strong data-start=\"680\" data-end=\"696\">bik\u0161u pl\u012bsums<\/strong> tests ir metode, kas aprakst\u012bta ASTM D1938. T\u0101 ietver \u201cbik\u0161u formas\u201d \u0161\u0137\u0113luma izgrie\u0161anu pl\u0113ves paraug\u0101, abu \u0161\u0137\u0113luma \u201ck\u0101ju\u201d iespie\u0161anu testa ma\u0161\u012bn\u0101 un parauga vilk\u0161anu ar nemain\u012bgu \u0101trumu. Testa laik\u0101 m\u0113ra sp\u0113ku, kas nepiecie\u0161ams pl\u012bsuma izplat\u012b\u0161anai. \u0160\u012b metode pal\u012bdz nov\u0113rt\u0113t, cik viegli var izplat\u012bties pl\u012bsums plastmasas pl\u0113v\u0113s, kas pak\u013cautas spriegumam.<\/p>\n\n\n\n<p>3. Ar ko ASTM D1938 at\u0161\u0137iras no cit\u0101m asaru test\u0113\u0161anas metod\u0113m?<br>ASTM D1938 ir \u012bpa\u0161i v\u0113rsta uz to, lai m\u0113r\u012btu iztur\u012bbu pret pl\u012bsuma izplat\u012b\u0161anos, kad pl\u012bsums jau ir s\u0101cies, savuk\u0101rt citas metodes, piem\u0113ram, ASTM D1938. <strong data-start=\"1289\" data-end=\"1312\">Elmendorfa asaru tests<\/strong> koncentr\u0113ties uz sp\u0113ku, kas nepiecie\u0161ams, lai izrais\u012btu pl\u012bsumu. T\u0101p\u0113c ASTM D1938 ir \u012bpa\u0161i noder\u012bgs plastmasas pl\u0113v\u0113m, jo tas imit\u0113 re\u0101lu pl\u012b\u0161anas procesu, kad pl\u012bsums s\u0101kas un izplat\u0101s pa materi\u0101lu, nevis tikai test\u0113 materi\u0101la iztur\u012bbu pret s\u0101kotn\u0113jo pl\u012bsumu.<\/p>\n\n\n\n<p>4. Uz k\u0101diem pl\u0113vju veidiem attiecas 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> var izmantot plastmasas pl\u0113v\u0113m un pl\u0101n\u0101m loksn\u0113m ar biezumu l\u012bdz 1 mm. Tas ir \u012bpa\u0161i svar\u012bgi pl\u0113v\u0113m, kuru biezums ir maz\u0101ks par 0,25 mm (0,010 collas). Testa metode nav piem\u0113rota pl\u0113v\u0113m, kur\u0101m test\u0113\u0161anas laik\u0101 rodas trausli boj\u0101jumi, un \u0161\u012b metode ir \u012bpa\u0161i izstr\u0101d\u0101ta materi\u0101liem, kas testa laik\u0101 ne\u0161\u0137\u012bst \u0161\u0137\u0113rsvirzien\u0101.<\/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\/lv\/wp-json\/wp\/v2\/standard\/9872","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.packqc.com\/lv\/wp-json\/wp\/v2\/standard"}],"about":[{"href":"https:\/\/www.packqc.com\/lv\/wp-json\/wp\/v2\/types\/standard"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.packqc.com\/lv\/wp-json\/wp\/v2\/media\/8743"}],"wp:attachment":[{"href":"https:\/\/www.packqc.com\/lv\/wp-json\/wp\/v2\/media?parent=9872"}],"wp:term":[{"taxonomy":"standard-category","embeddable":true,"href":"https:\/\/www.packqc.com\/lv\/wp-json\/wp\/v2\/standard-category?post=9872"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}