【英文标准名称】:StandardTestMethodforBreakingStrengthandElongationofTextileFabrics(GrabTest)
【原文标准名称】:纺织品断裂强力及伸长率标准试验方法(抓样法)
【标准号】:ASTMD5034-2009
【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】:D13.60
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:breaking-strength;elongation;fabric;nonwovenfabric;wovenfabric;Nonwoventextilefabrics;Tensileproperties/testing--textilematerials/applications;Textilefabrics(felted);Textilefabrics(general);Wettesting;Woventextilefabrics;Breaki
【摘要】:Thegrabtestprocedureinthistestmethodforthedeterminationofbreakingforceandelongationisconsideredsatisfactoryforacceptancetestingofcommercialshipmentsofmostwovenornonwoventextilefabrics,andthemodifiedgrabtestprocedureisconsideredsatisfactoryforacceptancetestingofcommercialshipmentsofmostwoventextilefabrics,sincetheprocedureshavebeenusedextensivelyinthetradeforacceptancetesting.Incaseofdisagreementarisingfromdifferencesinreportedtestvalueswhenusingthistestmethodforacceptancetestingofcommercialshipments,thepurchaserandthesuppliershouldconductcomparativeteststodetermineifthereisastatisticalbiasbetweentheirlaboratories.Competentstatisticalassistanceisrecommendedfortheinvestigationofbias.Asaminimum,thetwopartiesshouldtakeagroupoftestspecimenswhichareashomogeneousaspossibleandwhicharefromalotofmaterialofthetypeinquestion.Thetestspecimensshouldthenberandomlyassignedinequalnumberstoeachlaboratoryfortesting.TheaverageresultsfromthetwolaboratoriesshouldbecomparedusingStudent''st-testforunpaireddataandanacceptableprobabilitylevelchosenbythetwopartiesbeforetestingisbegun.Ifabiasisfound,eitheritscausemustbefoundandcorrected,orthepurchaserandthesuppliermustagreetointerpretfuturetestresultsinlightoftheknownbias.Thistestmethodisnotrecommendedforknittedfabricsbecauseoftheirhighstretch.Somemodificationoftechniquemaybenecessaryforanyfabrichavingastrengthinexcessof200-N/cm(1140-lb/in.)width.Specialprecautionarymeasuresareprovidedforusewhennecessaryforstrongfabrics.Alloftheproceduresareapplicablefortestingfabricseitherconditionedorwet.Comparisonofresultsfromtensiletestingmachinesoperatingondifferentprinciplesisnotrecommended.Whendifferenttypesofmachinesareusedforcomparisontesting,constant-time-to-breakat20x00B1;3sistheestablishedwayofproducingdata.Eventhenthedatamaydiffersignificantly.Althoughaconstant-rate-of-extensionispreferredintheseprocedures,incasesofdispute,unlessthereisagreementtothecontrarybetweenthepurchaserandthesupplier,aconstant-time-to-break(20x00B1;3s)istobeused.Thegrabtestprocedureisapplicabletothedeterminationoftheeffectivestrengthofthefabric;thatis,thestrengthoftheyarnsinaspecificwidthtogetherwiththefabricassistancefromtheadjacentyarns.Thebreakingforcedeterminedbythegrabprocedureisnotareflectionofthestrengthoftheyarnsactuallygrippedbetweenclampsandcannotbeusedfordirectcomparisonwithyarnstrengthdeterminations.Grabtestspecimensrequiremuchlesstimetopreparealthoughtheyrequiremorefabricperspecimen.Thereisnosimplerelationshipbetweengrabtestsandstriptestssincetheamountoffabricassistancedependsonthetypeoffabricandconstructionvariables.Themodifiedgrabtestprocedureisapplicabletothedeterminationofthebreakingforceoffabricswithconstructionsinwhichtheapplicationoftensilestressonraveledstripspecimensproducesfurtherunraveling.Thistestmethodisparticularlyapplicabletohigh-strengthfabrics.MetricEquivalentsin.
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【英文标准名称】:Dentistry-Rootcanalinstruments-Part4:Auxiliaryinstruments(ISO3630-4:2009);EnglishversionofDINENISO3630-4:2009-10
【原文标准名称】:牙科.根管器械.第4部分:辅助器械(ISO3630-4:2009),DINENISO3630-4:2009-10英文版本
【标准号】:ENISO3630-4-2009
【标准状态】:现行
【国别】:
【发布日期】:2009-10
【实施或试行日期】:
【发布单位】:欧洲标准学会(EN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:Colourcodes;Cottonbroaches;Definitions;Dentalequipment;Dentalinstruments;Dentistry;Determination;Dimensions;Instruments;Marking;Medicalinstruments;Medicalsciences;Packages;Rootcanalinstruments;Root-canalpastecarriers;Size;Specification;Specification(approval);Specifications;Testmethods;Testing
【摘要】:
【中国标准分类号】:C33
【国际标准分类号】:11_060_25
【页数】:16P.;A4
【正文语种】:英语