ASTM D4964-1996(2008)e1 弹性织物张力及伸长率的标准试验方法(等速伸长拉伸测试仪)

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【英文标准名称】:StandardTestMethodforTensionandElongationofElasticFabrics(Constant-Rate-of-ExtensionTypeTensileTestingMachine)
【原文标准名称】:弹性织物张力及伸长率的标准试验方法(等速伸长拉伸测试仪)
【标准号】:ASTMD4964-1996(2008)e1
【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】:D13.59
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:elongation;narrowelasticfabric;strand;tension(tensile)properties/tests;wideelasticfabricConstantrate-of-extension(CRE)test;Elastomericyarns;Elongation--textiles;Tensileproperties/testing--textilematerials/applications;Textile
【摘要】:Thistestmethodfortestinglooptensionandelongationofelasticfabricsisconsideredsatisfactoryforacceptancetestingofcommercialshipmentsofelasticfabricsbecausethetestmethodisusedinthetradeforacceptancetesting.Incaseofadisputearisingfromdifferencesinreportedtestresultswhenusingthistestmethodforacceptancetestingofcommercialshipments,thepartiesshouldconductcomparativeteststodetermineifthereisastatisticalbiasbetweentheirlaboratories.Competentstatisticalassistanceisrecommendedfortheinvestigationofbias.Asaminimum,thetwopartiesshouldtakeagroupoftestspecimensthatareashomogeneousaspossibleandthatarefromalotofmaterialofthetypeinquestion.Thetestspecimensshouldthenberandomlyassignedinequalnumberstoeachlaboratoryfortesting.Theaverageresultsfromthetwolaboratoriesshouldbecomparedusingstudent''st-testforunpaireddataandanacceptableprobabilitylevelchosenbythetwopartiesbeforethetestingisbegun.Ifbiasisfound,eitheritscausemustbefoundandcorrectedorthepurchaserandthesuppliermustagreetointerpretfuturetestresultswithconsiderationtotheknownbias.ThistestmethodspecifiestheuseoftheCRE-typetensiletestingmachine.UsersofthistestmethodarecautionedthatlooptensiontestdataobtainedusingthismethodarenotcomparabletotensiontestdataobtainedusingTestMethodD1775becauseofthedifferencesintestingmachines.TestMethodD1775usesaCRL-typetensiletestingmachine.Thelooptensionandextensionrelationshipofanelasticfabricisanimportantcriterionforjudgingthesuitabilityofthefabricforvariousenduses,suchas:foundationgarments,brassieres,andswimsuits.Datafromlooptension-recoverycurvescanbecomparedonlyifthetensiontestingmachine,rate-of-extension,maximumloading(orextension),andspecimenspecificationsarecomparable.Sincedifferentmachineset-upswillcausedifferentresultsonthesamefabric,machineset-upsmustalwaysbespecifiedbeforemakingatestandbereportedwiththetestresults.Thetestformeasuringlooptensionatspecifiedelongation(s)isusedtodeterminethetensionofanelasticfabricwhensubjectedtoaspecifiedelongationwhichislessthantheelongationrequiredtorupturethefabric.Thetestprescribespointsofmeasurementontheextending(outgoing)cycleonly.Thetestformeasuringelongationatspecifiedtension(s)isusedtodeterminetheelongationofanelasticfabricwhensubjectedtoaspecifiedlooptensionwhichislessthanthetensionrequiredtorupturethefabric.Thetestprescribespointsofmeasurementontheloading(outgoing)cycleonly.1.1Thistestmethodcoversthemeasurementoftensionandelongationofwideornarrowelasticfabricsmadefromnaturalorman-madeelastomers,eitheraloneorincombinationwithothertextileyarns,whentestedwithaconstant-rate-of-extension(CRE)typetensiletestingmachine.Note18212;Fordeterminationofsimilartestingusingtheconstant-rate-of-load(CRL)typetensiletestingmachine,refertoTestMethodD1775.1.2Theuseofthistestmethodrequirestheselectionof,ormutualagreementupon,looptension(s)andelongation(s)atwhichthetestresultswillbedetermined.1.3Launderingproceduresrequiremutualagreementontheselectionoftemperatureandnumberofwashingcyclesanddryingcyclestobeused.1.4ThevaluesstatedinSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;thereforeeachsystemmus......
【中国标准分类号】:W55
【国际标准分类号】:59_080_30
【页数】:5P.;A4
【正文语种】:英语