【英文标准名称】:StandardTestMethodforGradingSpunYarnsforAppearance
【原文标准名称】:短纤纱外观的分级的标准试验方法
【标准号】:ASTMD2255/D2255M-2009
【标准状态】:现行
【国别】:
【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】:D13.58
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:appearance;spunyarn;yarn;yarnappearanceindex;Appearanceoftextilematerials/applications;Cottonfabrics/fibers;Grading--textiles;Textilefibers;Yarnproperties
【摘要】:Thismethodisconsideredsatisfactoryforacceptancegradingofcommercialshipmentsbecauseithasbeenusedextensivelyinthetradeforthispurpose.Iftherearedifferencesofpracticalsignificancebetweenreportedtestresultsfortwolaboratories(ormore),comparativetestsshouldbeperformedtodetermineifthereisastatisticalbiasbetweenthem,usingcompetentstatisticalassistance.Asaminimum,usethesamplesforsuchacomparativeteststhatareashomogeneousaspossible,drawnfromthesamelotofmaterialasthesamplesthatresultedindisparateresultsduringinitialtestingandrandomlyassignedinequalnumberstoeachlaboratory.Thetestresultsfromthelaboratoriesinvolvedshouldbecomparedusingastatisticaltestforunpaireddata,aprobabilitylevelchosenpriortothetestingseries.Ifabiasisfound,eitheritscausemustbefoundandcorrected,orfuturetestresultsforthatmaterialmustbeadjustedinconsiderationoftheknownbias.Theappearanceofawovenorknittedfabricdependstoalargeextentonthesmoothness,cleanliness,andgeneralappearanceoftheyarnsfromwhichthefabricismanufactured.Instrumentsareavailableforthemeasurementofunevennessandforcountingnepsandotherimperfectionsinyarn,butthevaluesobtainedfromsuchtestsarenoteasilyintegratedintoanover-allexpressionforactualfabricappearance.Yarnappearancegradingaffordsadditionalinformationwhichthemanufacturerofwovenorknittedgoodsmay,throughexperience,correlatewiththeappearancetobeexpectedinfabricsmadefromtheyarns.1.1Thistestmethodcoversthegradingofsinglesspunyarnsforappearance.1.2Thistestmethoddoesnotapplytopliedyarns.1.3Thevaluesstatedineitherinch-poundorSIunitsaretoberegardedseparatelyasthestandard.Thevaluesstatedineachsystemarenotexactequivalents,therefore,eachsystemmustbeusedindependentlyoftheother.1.4Thisstandarddoesnotpurporttoaddressthesafetyconcernsassociatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:
【国际标准分类号】:59_080_20
【页数】:5P.;A4
【正文语种】: