ASTM D3816/D3816M-1996(2007) 压感胶带的水渗透率的标准试验方法

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【英文标准名称】:StandardTestMethodforWaterPenetrationRateofPressure-SensitiveTapes
【原文标准名称】:压感胶带的水渗透率的标准试验方法
【标准号】:ASTMD3816/D3816M-1996(2007)
【标准状态】:现行
【国别】:美国
【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;waterpenetrationrate
【摘要】:Theresultsofthistestmethodwillindicatetherelativepermeabilitybywaterofthetapethroughitssmallestdimension(generallynormaltothetapersquo;backing).5.1.1Thepathwayforthewaterparalleltotheadhesive-cupinterfaceisgreatcomparedtothetapersquo;thicknessandthelatterisusuallythenearlyexclusivesourceoftransmittedwater.5.1.2Sometapetypesallowarelativelyfreepathinadirectionnormaltothebackingoralongbackingpathwaysparalleltotheadhesive-cupinterface,allowingtheadhesivetobecometheprincipalbarrier.Iftheadhesivedoesnotcontinuetoadheretothecupflangeduringtheexposureperiods,allowingunintendedpathwaysforwatertooccur,themeasurementshouldbeconsideredasnothavingbeenmade.Consequently,thetapemightbeconsideredasbeinginappropriateforuseonsurfaceslikethecupflangeundermoistureconditionsapproximatingthoseofthetest.Note18212;Itmaybethattheinterestissimplyinthetapematerialasawaterbarrier.Inthiscasehowwellthetapeadherestothecupflangemaybeoflittleconsequenceandstepstopreventanyedgeeffectsareinorder.ThesearereferredtoinSection10.1.1Thistestmethodprovidesoneprocedureformeasuringthewaterpenetrationrateof2-in.orwiderpressure-sensitivetape.1.2ThevaluesstatedineitherSIorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeequivalent;therefore,eachsystemmustbeusedindependently,withoutcombiningvaluesinanyway.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:G39
【国际标准分类号】:
【页数】:3P.;A4
【正文语种】:英语