{"id":3268,"date":"2026-04-22T08:44:19","date_gmt":"2026-04-22T08:44:19","guid":{"rendered":"https:\/\/test.geo-tester.com\/?post_type=application&#038;p=3268"},"modified":"2026-04-23T02:13:48","modified_gmt":"2026-04-23T02:13:48","slug":"astm-d2732","status":"publish","type":"application","link":"https:\/\/test.geo-tester.com\/lt\/application\/astm-d2732.html","title":{"rendered":"ASTM D2732"},"content":{"rendered":"<h2 class=\"wp-block-heading\">ASTM D2732 standarto supratimas ir jo vaidmuo pl\u0117vel\u0117s veikimui<\/h2>\n\n\n\n<p><strong>ASTM D2732<\/strong> apibr\u0117\u017eia standartizuot\u0105 metod\u0105, skirt\u0105 \u012fvertinti <em>nesuvar\u017eytas linijinis terminis susitraukimas<\/em> plastikini\u0173 pl\u0117veli\u0173 ir lak\u0161t\u0173, kuri\u0173 storis \u22640,76 mm. \u0160is metodas labai svarbus vertinant pl\u0117veli\u0173 elgsen\u0105 veikiant kar\u0161\u010diui - tai labai svarbus parametras pakuo\u010di\u0173, medicinos ir pramon\u0117s srityse.<\/p>\n\n\n\n<p>Gamindami pl\u0117vel\u0119, gamintojai da\u017enai sukelia vidinius \u012ftempius d\u0117l tempimo ar orientavimo proces\u0173. Veikiant auk\u0161tesnei temperat\u016brai, \u0161ie \u012ftempiai atsipalaiduoja ir sukelia matmen\u0173 susitraukim\u0105. ASTM D2732 pateikia kontroliuojam\u0105 sistem\u0105, pagal kuri\u0105 galima tiksliai \u012fvertinti \u0161i\u0105 elgsen\u0105.<\/p>\n\n\n\n<p>\u0160ie duomenys leid\u017eia in\u017einieriams ir kokyb\u0117s kontrol\u0117s komandoms prognozuoti veikim\u0105 realiomis \u0161ilumin\u0117mis s\u0105lygomis, u\u017etikrinant, kad med\u017eiagos atitikt\u0173 taikymo reikalavimus, nesideformuot\u0173, nesugest\u0173 ir nesukelt\u0173 sandarinimo problem\u0173.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Susitraukimo bandymai ir susitraukimo pl\u0117vel\u0117s testeris<\/h2>\n\n\n\n<p><strong>Susitraukimo bandymas<\/strong> pagal ASTM D2732 standart\u0105 pl\u0117vel\u0117s bandiniai panardinami \u012f \u012fkaitint\u0105 skyst\u0105 terp\u0119, kad b\u016bt\u0173 galima steb\u0117ti matmen\u0173 poky\u010dius. Patikimas <strong>susitraukimo pl\u0117veli\u0173 testeris<\/strong> u\u017etikrina pastovi\u0105 temperat\u016bros kontrol\u0119 ir pakartojamus rezultatus.<\/p>\n\n\n\n<p>Pagrindiniai testavimo principai:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Nesuvar\u017eyta b\u016bkl\u0117:<\/strong> Bandinys turi laisvai trauktis be i\u0161orini\u0173 j\u0117g\u0173<\/li>\n\n\n\n<li><strong>\u0160ilumin\u0117 pusiausvyra:<\/strong> M\u0117ginys panardinimo metu turi pasiekti stabili\u0105 temperat\u016br\u0105<\/li>\n\n\n\n<li><strong>Kryptinis matavimas:<\/strong> Susitraukimas registruojamas tiek ma\u0161inos kryptimi (MD), tiek skersine kryptimi (TD)<\/li>\n<\/ul>\n\n\n\n<p>Specializuota priemon\u0117, pvz. <strong>FST-01 Pl\u0117vel\u0117s be pl\u0117vel\u0117s susitraukimo testeris<\/strong> \u017eymiai pagerina testavimo tikslum\u0105. Jis si\u016blo:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>PID temperat\u016bros reguliavimas (\u00b10,3 \u00b0C)<\/strong> stabiliam \u0161ildymui<\/li>\n\n\n\n<li>Vienalyt\u0117 skys\u010dio terp\u0117, kad b\u016bt\u0173 i\u0161vengta temperat\u016bros gradient\u0173<\/li>\n\n\n\n<li>Laisvai susitraukiantys laikikliai, kad b\u016bt\u0173 i\u0161vengta mechaninio suvar\u017eymo<\/li>\n\n\n\n<li>Tikslus laiko nustatymas nuosekliems buvimo laikotarpiams<\/li>\n<\/ul>\n\n\n\n<p>\u0160ios savyb\u0117s tiesiogiai atitinka ASTM D2732 standarto reikalavimus ir suma\u017eina operatoriaus nulemt\u0105 kintamum\u0105.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Bandymo proced\u016bra pagal ASTM D2732<\/h2>\n\n\n\n<p>Siekiant u\u017etikrinti atitikt\u012f ir pakartojamum\u0105, laboratorijose laikomasi strukt\u016brizuotos proced\u016bros:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">M\u0117ginio paruo\u0161imas<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>I\u0161kirpti pavyzd\u017eiai <strong>100 mm \u00d7 100 mm<\/strong><\/li>\n\n\n\n<li>Paruo\u0161kite bent du m\u0117ginius vienai bandymo temperat\u016brai<\/li>\n\n\n\n<li>Jei reikia, pa\u017eym\u0117kite orientacij\u0105 (MD\/TD)<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Testavimo etapai<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u012ed\u0117kite m\u0117gin\u012f \u012f laisvai susitraukian\u010di\u0105 talpykl\u0105<\/li>\n\n\n\n<li>U\u017efiksuokite vonios temperat\u016br\u0105 prie\u0161 panardinim\u0105<\/li>\n\n\n\n<li>Panardinkite m\u0117gin\u012f \u012f vanden\u012f ma\u017edaug <strong>10 sekund\u017ei\u0173<\/strong><\/li>\n\n\n\n<li>I\u0161imkite ir nedelsdami atv\u0117sinkite kambario temperat\u016bros skystyje.<\/li>\n\n\n\n<li>I\u0161matuokite galutinius matmenis po stabilizavimo<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">Svarbios pastabos<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Prie\u0161 panardinim\u0105 venkite kaitinti bandin\u012f.<\/li>\n\n\n\n<li>U\u017ekirskite keli\u0105 m\u0117ginio i\u0161tempimui j\u012f tvarkant<\/li>\n\n\n\n<li>Jei reikia, pakoreguokite panardinimo laik\u0105 storesn\u0117ms med\u017eiagoms<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Susitraukimo rezultat\u0173 apskai\u010diavimas<\/h2>\n\n\n\n<p>Pagal ASTM D2732 susitraukimas i\u0161rei\u0161kiamas kaip matmen\u0173 poky\u010dio procentin\u0117 dalis:<\/p>\n\n\n\n<p><math xmlns=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"><semantics><mrow><mtext>Susitraukimas (%)<\/mtext><mo>=<\/mo><mfrac><mrow><msub><mi>L<\/mi><mn>0<\/mn><\/msub><mo>\u2212<\/mo><msub><mi>L<\/mi><mi>f<\/mi><\/msub><\/mrow><msub><mi>L<\/mi><mn>0<\/mn><\/msub><\/mfrac><mo>\u00d7<\/mo><mn>100<\/mn><\/mrow><annotation encoding=\"application\/x-tex\">\\tekstas{Susitraukimas (\\%)} = \\frac{L_0 - L_f}{L_0} \\ kartus 100<\/annotation><\/semantics><\/math>Susitraukimas (%)=L0L0-Lf\u00d7100<\/p>\n\n\n\n<p>Kur:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>L\u2080<\/strong> = pradinis ilgis (paprastai 100 mm)<\/li>\n\n\n\n<li><strong>L_f<\/strong> = Galutinis ilgis po susitraukimo<\/li>\n<\/ul>\n\n\n\n<p>\u0160is skai\u010diavimas leid\u017eia ai\u0161kiai ir kiekybi\u0161kai \u012fvertinti med\u017eiagos elgsen\u0105 esant \u0161iluminei apkrovai.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">ASTM D2732 standarto reik\u0161m\u0117 kokyb\u0117s kontrolei<\/h2>\n\n\n\n<p>ASTM D2732 pateikia nauding\u0173 \u012f\u017evalg\u0173 apie:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Apdorojimo nuoseklumas:<\/strong> aptikti pl\u0117vel\u0117s orientacijos ir gamybos s\u0105lyg\u0173 skirtumus.<\/li>\n\n\n\n<li><strong>Terminis stabilumas:<\/strong> Nustatyti susitraukimo ribas, susijusias su polimer\u0173 per\u0117jimais<\/li>\n\n\n\n<li><strong>Galutinio naudojimo charakteristikos:<\/strong> U\u017etikrinkite pakuot\u0117s vientisum\u0105, ypa\u010d terminio susitraukimo atveju.<\/li>\n<\/ul>\n\n\n\n<p>Pavyzd\u017eiui, d\u0117l pernelyg didelio susitraukimo gali atsirasti:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>I\u0161kreipta pakuot\u0117s i\u0161vaizda<\/li>\n\n\n\n<li>Medicinini\u0173 mai\u0161eli\u0173 sandarinimo pa\u017eeidimai<\/li>\n\n\n\n<li>Mechaninis \u012ftempis sluoksniuotose strukt\u016brose<\/li>\n<\/ul>\n\n\n\n<p>Atlikdami bandymus keliose temperat\u016brose, in\u017einieriai gali nustatyti <strong>susitraukimo profilio kreiv\u0117<\/strong>, tod\u0117l galima tiksliai parinkti med\u017eiagas ir optimizuoti proces\u0105.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Kod\u0117l verta rinktis pa\u017eangius testavimo sprendimus, tokius kaip FST-01<\/h2>\n\n\n\n<p>Praktin\u0117je laboratorin\u0117je aplinkoje taikant rankinius metodus da\u017enai atsiranda neatitikim\u0173. Svetain\u0117je <strong>FST-01 <a href=\"https:\/\/test.geo-tester.com\/lt\/products\/fst-01-film-free-shrink-tester.html\/\" target=\"_blank\" data-type=\"products\" data-id=\"3069\" rel=\"noreferrer noopener\">Pl\u0117vel\u0117s be pl\u0117vel\u0117s susitraukimo testeris<\/a><\/strong> sprend\u017eia \u0161iuos i\u0161\u0161\u016bkius:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Pakartojamos \u0161ildymo s\u0105lygos<\/strong> per partijas<\/li>\n\n\n\n<li><strong>Ma\u017eiau \u017emogi\u0161k\u0173j\u0173 klaid\u0173<\/strong> laiko ir tvarkymo<\/li>\n\n\n\n<li><strong>Didesnis saugumas<\/strong> su u\u017edaromis alyvos voni\u0173 sistemomis<\/li>\n<\/ul>\n\n\n\n<p>Pakuo\u010di\u0173, vaist\u0173 ir elektronikos gamintojams tokie prietaisai u\u017etikrina atitikt\u012f ASTM D2732 standartui ir kartu padidina na\u0161um\u0105 bei patikimum\u0105.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">ASTM D2732 bandym\u0173 taikymas<\/h2>\n\n\n\n<p>Pramon\u0117s sektoriai remiasi ASTM D2732 standartu:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Lanks\u010dios pakavimo pl\u0117vel\u0117s (PET, PE, PVC)<\/li>\n\n\n\n<li>Medicininiai ir farmaciniai steril\u016bs barjerai<\/li>\n\n\n\n<li>\u0160ilumos susitraukian\u010dios \u012fvor\u0117s ir vamzdeliai<\/li>\n\n\n\n<li>Pramonin\u0117s tempimo ir pakavimo pl\u0117vel\u0117s<\/li>\n<\/ul>\n\n\n\n<p>Kiekvienu atveju susitraukimo elgesys turi tiesiogin\u0117s \u012ftakos gaminio funkcionalumui ir vizualinei kokybei.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">DUK<\/h2>\n\n\n\n<p><strong>1. K\u0105 matuoja ASTM D2732?<\/strong><br>Juo matuojamas nevar\u017eomas linijinis linijinis plastikini\u0173 pl\u0117veli\u0173 terminis susitraukimas, kai jos veikiamos kontroliuojamo kar\u0161\u010dio.<\/p>\n\n\n\n<p><strong>2. Kod\u0117l pakuo\u010di\u0173 pl\u0117vel\u0117s susitraukimo bandymai yra svarb\u016bs?<\/strong><br>Jis u\u017etikrina, kad pl\u0117vel\u0117s i\u0161laikyt\u0173 matmen\u0173 stabilum\u0105 ir sandarumo vientisum\u0105 veikiant kar\u0161\u010diui perdirbimo ar galutinio naudojimo metu.<\/p>\n\n\n\n<p><strong>3. Koks yra standartinis bandinio dydis pagal ASTM D2732?<\/strong><br>Standartinis dydis yra 100 mm \u00d7 100 mm, kad matavimai b\u016bt\u0173 tiksl\u016bs ir nuosekl\u016bs.<\/p>\n\n\n\n<p><strong>4. Kiek laiko bandinys turi b\u016bti panardintas?<\/strong><br>Paprastai 10 sekund\u017ei\u0173, ta\u010diau storesn\u0117ms med\u017eiagoms gali prireikti patvirtinimo, kad b\u016bt\u0173 pasiekta pakankama \u0161ilumin\u0117 pusiausvyra.<\/p>\n\n\n\n<p><strong>5. Kokia \u012franga rekomenduojama <a href=\"https:\/\/store.astm.org\/d2732-14r25.html\" target=\"_blank\" rel=\"noreferrer noopener\">ASTM D2732<\/a> testavimas?<\/strong><br>Specialus susitraukimo pl\u0117veli\u0173 testeris, pavyzd\u017eiui, FST-01, u\u017etikrina tiksli\u0105 temperat\u016bros kontrol\u0119 ir pakartojamus rezultatus.<\/p>","protected":false},"excerpt":{"rendered":"<p>ASTM D2732 apibr\u0117\u017eia standartizuot\u0105 metod\u0105 plastikini\u0173 pl\u0117veli\u0173 nesuvar\u017eytam terminiam susitraukimui \u012fvertinti, kai bandiniai panardinami \u012f \u012fkaitint\u0105 terp\u0119 ir matuojami matmen\u0173 poky\u010diai.<\/p>","protected":false},"featured_media":3270,"parent":0,"template":"","meta":{"_acf_changed":false},"standard":[1012],"class_list":["post-3268","application","type-application","status-publish","has-post-thumbnail","hentry","standard-astm"],"acf":[],"_links":{"self":[{"href":"https:\/\/test.geo-tester.com\/lt\/wp-json\/wp\/v2\/application\/3268","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/test.geo-tester.com\/lt\/wp-json\/wp\/v2\/application"}],"about":[{"href":"https:\/\/test.geo-tester.com\/lt\/wp-json\/wp\/v2\/types\/application"}],"version-history":[{"count":2,"href":"https:\/\/test.geo-tester.com\/lt\/wp-json\/wp\/v2\/application\/3268\/revisions"}],"predecessor-version":[{"id":3271,"href":"https:\/\/test.geo-tester.com\/lt\/wp-json\/wp\/v2\/application\/3268\/revisions\/3271"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/test.geo-tester.com\/lt\/wp-json\/wp\/v2\/media\/3270"}],"wp:attachment":[{"href":"https:\/\/test.geo-tester.com\/lt\/wp-json\/wp\/v2\/media?parent=3268"}],"wp:term":[{"taxonomy":"standard","embeddable":true,"href":"https:\/\/test.geo-tester.com\/lt\/wp-json\/wp\/v2\/standard?post=3268"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}