ASTM D1388-2008 织物硬度的标准试验方法

作者:标准资料网 时间:2024-05-13 04:46:41  浏览:9070   来源:标准资料网

【英文标准名称】:StandardTestMethodforStiffnessofFabrics
【原文标准名称】:织物硬度的标准试验方法
【标准号】:ASTMD1388-2008
【标准状态】:现行
【国别】:美国
【发布日期】:2008
【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】: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】:W55
【国际标准分类号】:59_080_30
【页数】:6P.;A4
【正文语种】:英语