ASTM D2732-2008 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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【英文标准名称】:StandardTestMethodforUnrestrainedLinearThermalShrinkageofPlasticFilmandSheeting
【原文标准名称】:塑料薄膜和薄板的自由线性热收缩率的测试方法
【标准号】:ASTMD2732-2008
【标准状态】:现行
【国别】:美国
【发布日期】:2008
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:D20.19
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:freeshrink;plastics;sheeting;unrestrainedlinearshrinkage;Plasticsheetandfilm;Shrinkage--plasticsheetandfilm
【摘要】:Asaresultofthemanufacturingprocess,internalstressesmaybelockedintothefilmwhichcanbereleasedbyheating.Thetemperatureatwhichshrinkagewilloccurisrelatedtotheprocessingtechniquesemployedtomanufacturethefilmandmayalsoberelatedtoaphasetransitioninthebaseresin.Themagnitudeoftheshrinkagewillvarywiththetemperatureofthefilm.Shrinkageofaparticularmaterialproducedbyaparticularprocessmaybecharacterizedbythistestmethodbymakingmeasurementsatseveraltemperaturesthroughtheshrinkagerangeofthematerial.Followingacharacterizationinaparticularcase,itisusuallysufficientthereaftertomeasureshrinkageatonlyoneselectedtemperatureforpurposesofprocessorqualitycontrol,orboth.1.1Thistestmethodcoversdeterminationofthedegreeofunrestrainedlinearthermalshrinkageatgivenspecimentemperaturesofplasticfilmandsheetingof0.76mm(0.030in.)thicknessorless.Thistestmethoddoesnotcovershrinkagefromlossofsolventinsomematerials.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Thevaluesgiveninparenthesesaremathematicalconversionstoinch-poundunitsthatareprovidedforinformationonlyandarenotconsideredstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Note18212;ThisdocumentisnotequivalenttoISO11501.
【中国标准分类号】:G33
【国际标准分类号】:83_140_10
【页数】:5P.;A4
【正文语种】:英语