ASTM D5419-2009 螺纹塑料密封箱抗环境应力裂开性能的标准试验方法

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【英文标准名称】:StandardTestMethodforEnvironmentalStressCrackResistance(ESCR)ofThreadedPlasticClosures
【原文标准名称】:螺纹塑料密封箱抗环境应力裂开性能的标准试验方法
【标准号】:ASTMD5419-2009
【标准状态】:现行
【国别】:美国
【发布日期】:2009
【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】:closures;environmentalstresscrackresistance(ESCR);failure;plastic;stresscrack;threadedplasticclosures;Closures(threaded);Environmentalstresscrackresistance(ESCR);Failureendpoint--plastics;Polypropylene(PP);Polystyrene(PS);St
【摘要】:ThistestmethodcomparesclosuresforESCR.Suitablevariablesare:closurematerials,closuredesigns,processes,appliedtorque,andstress-crackagents.ResultscanbeusedforestimatingshelflifeofclosuresintermsofESCR.Thisrequiresthattheuserhascalibratedfailuretimeinthistesttofailuretimeinthefieldforactualpackagingsystems.1.1Thistestmethoddeterminesthesusceptibilityofthreadedplasticclosurestofailureduetoenvironmentalstresscracking(ESC).1.2Inuse,threadedplasticclosurescancontactagentsthatappreciablyreducethestressatwhichcracksform.Examplesofsuchagentsare:soaps,detergents,oils,andliquidbleaches.1.3Majorfactorsthatinfluenceenvironmentalstresscrackresistance(ESCR)ofthreadedplasticclosuresincludetheclosurematerial(s),closuredesign,molded-instress,andappliedstress.1.4Thisprocedurecanbeappliedtoallclosures,butisparticularlyapplicabletoclosuresmadefromplasticsbasedonpolypropylene(PP)orpolystyrene(PS).1.5ThevaluesstatedinSIunitsaretoberegardedasthestandard.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.SpecificprecautionarystatementsaregiveninSection8and6.2.Note18212;ThereisnoknownISOequivalenttothistestmethod.
【中国标准分类号】:G32
【国际标准分类号】:
【页数】:5P.;A4
【正文语种】:英语