ASTMD273203塑料薄膜和薄板的自由线性热收缩率的测试方法

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1、www.babake.net巴巴客免费下载标准Designation:D2732–03StandardTestMethodforUnrestrainedLinearThermalShrinkageofPlasticFilm1andSheetingThisstandardisissuedunderthe®xeddesignationD2732;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anum

2、berinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*4.Signi®canceandUse1.1Thistestmethodcoversdeterminationofthedegreeof4.1Asaresultofthemanufacturingprocess,internalunrestrainedlinearthermalshrinkageatgivenspeci

3、mentem-stressesmaybelockedintothe®lmwhichcanbereleasedbyperaturesofplastic®lmandsheetingof0.76mm[0.030in.]heating.Thetemperatureatwhichshrinkagewilloccuristhicknessorless.Thistestmethoddoesnotcovershrinkagerelatedtotheprocessingtechniquesemployedtomanufacturefromlossofsolventinsomematerials.the®lm

4、andmayalsoberelatedtoaphasetransitioninthebase1.2Thisstandarddoesnotpurporttoaddressalloftheresin.Themagnitudeoftheshrinkagewillvarywiththesafetyconcerns,ifany,associatedwithitsuse.Itisthetemperatureofthe®lm.responsibilityoftheuserofthisstandardtoestablishappro-4.2Shrinkageofaparticularmaterialpro

5、ducedbyapar-priatesafetyandhealthpracticesanddeterminetheapplica-ticularprocessmaybecharacterizedbythistestmethodbybilityofregulatorylimitationspriortouse.makingmeasurementsatseveraltemperaturesthroughtheshrinkagerangeofthematerial.NOTE1ÐThisdocumentisnotequivalenttoISO11501.4.3Followingacharacter

6、izationinaparticularcase,itis2.ReferencedDocumentsusuallysufficientthereaftertomeasureshrinkageatonlyoneselectedtemperatureforpurposesofprocessorqualitycontrol,2.1ASTMStandards:2orboth.D618PracticeforConditioningPlasticsforTestingD883TerminologyRelatingtoPlastics25.ApparatusD1204TestMethodforLinea

7、rDimensionalChangesof5.1Constant-TemperatureLiquidBath,capableofcontrol-NonrigidThermoplasticSheetingorFilmatElevated2lingaccuratelyto60.5°C.Temperature35.1.1TheliquidforthebathshouldnotplasticizeorreactE1Speci®c