DIN-53122-1-2001-英文

ICS59.080.30;83.140.10;85.060PrüfungvonKunststoff-Folien,Elastomerfolien,Papier,PappeundanderenFlächengebilden;BestimmungderWasserdampfdurch-lässigkeit–Teil1:GravimetrischesVerfahrenInkeepingwithcurrentpracticeinstandardspublishedbytheInternationalOrganizationforStandardization(ISO),acommahasbeenusedthroughoutasthedecimalmarker.Ref.No.DIN53122-1:2001-08Englishpricegroup07SalesNo.010703.02DEUTSCHENORMAugust200153122-1{Continuedonpages2to7.©NopartofthistranslationmaybereproducedwithoutthepriorpermissionofDINDeutschesInstitutfürNormunge.V.,Berlin.BeuthVerlagGmbH,10772Berlin,Germany,hastheexclusiverightofsaleforGermanStandards(DIN-Normen).Determinationofthewatervapourtransmissionrateofplasticfilm,rubbersheeting,paper,boardandothersheetmaterialsbygravimetryTranslationbyDIN-Sprachendienst.Incaseofdoubt,theGerman-languageoriginalshouldbeconsultedastheauthoritativetext.SupersedesDIN53122-1,November1974edition.ForewordThisstandardhasbeenpreparedbyTechnicalCommitteeChemisch-undchemischtechnologischePrüfverfahrenfürPapier,HalbstoffundChemiezellstoffoftheNormenausschussMaterialprüfung(MaterialsTestingStandardsCommittee).AlthoughthestandardislargelybasedonInternationalStandardISO2528:1995,itdiffersfromthelatterinthatatestdishmadeofglasswithoutagroovearoundtherim(cf.figure3)hasbeenspecifiedasanadditional,verywidelyuseddesign,whichhastheadvantagethatagoodsealisensuredsincetheexternalsealingcompound(cf.figure4)hardlyeverbecomesdetachedduringcooling.Twopointsareimportantinselectingthesizeofdish,namelypreventingthedesiccantfrombecomingsaturatedduringthetest,ontheonehand,andminimizingthetotalmass,ontheother,toreduceitseffectontheaccuracyofweighing.Normalizationofthewatervapourtransmissionratetoastandardthicknessisoftenrequired,butispossibleonlyforhomogeneousmaterial,notformultilayerorlaminatedsamples,and,ofcourse,onlyinthecaseofanunalteredandessentiallyuniformmaterialmatrix.Iftheseconditionsarefulfilled,thewatervapourtransmissionrate,WVTR,ofsimilarsamplesofdifferentthicknessisinverselyproportionaltothethickness,i.e.()()1Thickness2Thickness21orThickness1=»WVTRWVTRWVTRToobtainguidelinevaluesforalaminatedmaterial(e.g.multi-layerfilm)fromtheWVTRvaluesofthecomponents,ifthesame(above)conditionsarefulfilled,thereciprocalsoftheirwatervapourtransmissionrates,1/WVTR,shallbeadded,i.e.thetheirwatervapourtransmissionrateofthecompositewillthenbe:()()()1212111-++»WVTRWVTRWVTRThismeansthat,inalaminatedmaterial,alayerhavingalowwatervapourtransmissionratecombinedwithotherhighlytransmissivelayers(i.e.layershavingahighwatervapourtransmissionrate)virtuallydeterminestherateofthecompositeonitsown.SeeDIN53122-2forothermethodsofdeterminingwatervapourtransmissionrates(e.g.iftheseareverylow).AmendmentsThisstandarddiffersfromtheNovember1974editionasfollows.a)Thescopeofthemethodhasbeenextendedtocoverwatervapourtransmissionratesfrom1g/m2dto200g/m2d.b)Thedescriptionoftheprincipleofthemethodhasbeenamended.c)Thespecificationsfortheapparatusandthetestprocedurehavebeenamended.d)Detailsofthetestreporthavebeenchanged.e)Thestandardhasbeeneditoriallyrevised.Page2DIN53122-1:2001-08PreviouseditionsDIN53413:1940x-11;DIN53122:1958-02,1961-04;DIN53122-1:1974-11.Alldimensionsareinmillimetres.1ScopeThemethodspecifiedinthisstandardservestodeterminethewatervapourtransmissionrate,WVTR,ofsheetmaterialsbythegravimetricmethodusingadishsealedwithwaxandcanbeapplied,forexample,toplasticfilmandrubbersheeting,paper,boardortextileswithorwithoutcoating.Itisespeciallysuitablefordeterminingratesrangingfrom1g/m2dto200g/m2d.NOTE:Underrefinedtestconditions(e.g.involvingair-pressurecontrol,prolongedtestdurationandconstanttestatmosphere),themethodcanalsobeuseddowntoratesofabout0,5g/m2d.2NormativereferencesThisstandardincorporates,bydatedorundatedreference,provisionsfromotherpublications.Thesenorma-tivereferencesarecitedattheappropriateplacesinthetext,andthetitlesofthepublicationsarelistedbelow.Fordatedreferences,subsequentamendmentstoorrevisionsofanyofthesepublicationsapplytothisstandardonlywhenincorporatedinitbyamendmentorrevision.Forundatedreferences,thelatesteditionofthepublicationreferredtoapplies.DIN53122-2Determinationofwatervapourtransmissionrateofplasticfilm,paper,boardandothersheetmaterialsbyelectrolysisDIN53352Testingofartificialleatherandsimilarsheetmaterials–DeterminationofmassperunitareaDIN53370DeterminingplasticfilmandsheetingthicknessbythestylusmethodDIN53504Determinationoftensilestress/strainpropertiesofrubberDINEN20534Paperandboard–Determinationofthicknessandapparentbulkdensityorapparentsheetdensity(ISO534:1988)ISO2528:1995Sheetmaterials–Determinationofwatervapourtransmissionrate–Gravimetric(dish)methodISO9932:1990Paperandboard–Determinationofwatervapourtransmissionrateofsheetmaterials–Dynamicsweepandstaticgasmethods3ConceptWatervapourtransmissionrateForthepurposesofthisstandard,themassofwatervapourthatpasses,underspecifiedconditions,fromanevaporationchamberthroughtheexposedsurfaceofasampleintoatestdishperdayandpersquaremetreofsamplearea.NOTE:Sincethewatervapourtran