【英文标准名称】:StandardTestMethodforWaterVaporTransmissionofPressure-SensitiveTapes
【原文标准名称】:压敏带水蒸气透过性的标准试验方法
【标准号】:ASTMD3833/D3833M-1996(2006)
【标准状态】:现行
【国别】:
【发布日期】:1996
【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】:D10.14
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:pressure-sensitivetape;watervaportransmission
【摘要】:Theresultsofthistestmethodwillindicatetherelativepermeabilitybywatervaporofthetapethroughitssmallestdimension(generallynormaltothetapersquo;backing).5.1.1Thepathwayforthewatervaporparalleltotheadhesive-cupinterfaceisgreatcomparedtothetapersquo;thicknessandthelatterisusuallythenearlyexclusivesourceoftransmittedvapor.5.1.2Sometapetypesallowarelativelyfreepathinadirectionnormaltothebackingoralongbackingpathwaysparalleltotheadhesive-cupinterfaceallowingtheadhesivetobecometheprincipalbarrier.Iftheadhesivedoesnotcontinuetoadheretothecupflangeduringtheexposureperiodsallowingunintendedpathwaysforwatervaportooccur,themeasurementshouldbeconsideredasnothavingbeenmade.Consequently,thetapemightbeconsideredasbeinginappropriateforuseonsurfaceslikethecupflangeundermoistureconditionsapproximatingthoseofthetest.Note18212;Itmaybethattheinterestissimplyinthetapematerialasawatervaporbarrier.Inthiscase,howwellthetapeadherestothecupflangemaybeoflittleconsequence,andstepstopreventanyedgeeffectsareinorder.ThesearereferredtoinSection10.1.1Thistestmethodcoversoneprocedureformeasuringthewatervaportransmissionrateofpressure-sensitivetape.1.2ThevaluesstatedineitherSIorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemmustbeusedindependently,withoutcombiningvaluesinanyway.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:G39
【国际标准分类号】:55_040
【页数】:3P.;A4
【正文语种】: