ASTM D1388-2007a 织物硬挺性标准试验方法

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【英文标准名称】:StandardTestMethodforStiffnessofFabrics
【原文标准名称】:织物硬挺性标准试验方法
【标准号】:ASTMD1388-2007a
【标准状态】:现行
【国别】:
【发布日期】:2007
【实施或试行日期】:
【发布单位】:美国材料与试验协会(ASTM)
【起草单位】:D13.60
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:弯曲长度;硬挺度;测试;试验;机织物
【英文主题词】:bendinglength,fabric;fabric;flexuralrigidity,stiffness;Stiffness--textilematerials/applications;Textilefabrics(general);
【摘要】:Bothtestoptionsinthistestmethodareconsideredsatisfactoryforacceptancetestingofcommercialshipmentssincecurrentestimatesofbetween-laboratoryprecisionareacceptableandthemethodisusedextensivelyinthetradeforacceptancetesting.Incaseofadisputearisingfromdifferencesinreportedtestresultswhenusingthistestmethodforacceptancetestingofcommercialshipments,thepurchaserandthesuppliershouldconductcomparativeteststodetermineifthereisastatisticalbiasbetweentheirlaboratories.Competentstatisticalassistanceisrecommendedfortheinvestigationofbias.Asaminimum,thetwopartiesshouldtakeagroupoftestspecimensthatareashomogeneousaspossibleandthatarefromalotofmaterialofthetypeinquestion.Testspecimensshouldthenberandomlyassignedinequalnumberstoeachlaboratoryfortesting.Theaverageresultsfromthetwolaboratoriesshouldbecomparedusingtheappropriatestatisticalanalysisandanacceptableprobabilitylevelchosenbythetwopartiesbeforetestingisbegun.Ifabiasisfound,eitheritscausemustbefoundandcorrectedorthepurchaserandthesuppliermustagreetointerpretfuturetestresultswithconsiderationtotheknownbias.Ingeneral,theseproceduresaremoresuitablefortestingwovenfabricsthanknitfabrics.TheCantileverTestOptionisthepreferredprocedurebecauseitissimplertoperform.Itis,however,notsuitableforverylimpfabricsorthosethatshowamarkedtendencytocurlortwistatacutedge.TheHeartLoopTestOptionissuitableforfabricsthatshowatendencytocurlortwist.Bothoptionscanprovideacorrelationwithasubjectiveevaluationofagivenfabrictype.Thatis,ahighernumberrepresentsastifferfabric.Thestiffnessofafabricmaychangewithstorage.Noevidencehasbeenfoundshowingthatbendinglengthisdependentonthewidth.Thetendencyforspecimenstocurlortwistwillaffecttheresult,becauseoftherigidityprovidedattheedge.Consequently,thewiderthestrip,thelessimportantistheedgeeffect.1.1Thistestmethodcoversthemeasurementofstiffnesspropertiesoffabrics.Bendinglengthismeasuredandflexuralrigidityiscalculated.Twoproceduresareprovided.1.1.1OptionA8212;CantileverTest,employingtheprincipleofcantileverbendingofthefabricunderitsownmass.1.1.2OptionB8212;HeartLoopTest,employingtheprincipleofaloopformedinafabricstripandhungvertically.1.2Thistestmethodappliestomostfabricsincludingwovenfabrics,airbagfabrics,blankets,nappedfabrics,knittedfabrics,layeredfabrics,pilefabrics.Thefabricsmaybeuntreated,heavilysized,coated,resin-treated,orotherwisetreated.1.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.TheU.S.customaryunitsmaybeapproximate.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:W04
【国际标准分类号】:59_080_30;
【页数】:6P.;A4
【正文语种】: