ASTM D2494-02纱线或人造纤维或纤维束货包的商业质量的试验方法

Designation:D2494–02StandardTestMethodforCommercialMassofaShipmentofYarnorManufacturedStapleFiberorTow1ThisstandardisissuedunderthefixeddesignationD2494;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodprovidesameasurementofthecom-mercialmassofashipmentofyarnormanufacturedstaplefiberortow.Thistestmethodappliesto(1)yarnofallfibertypesexceptsilk,glass,asbestos,andbast;(2)topsandsliversofallfibertypesexceptwool,silk,glass,asbestos,andbast;and(3)manufacturedfibersortow,exceptglassandotherfibersusedforspecialpurposessuchasflock(Note1).NOTE1—Forothertestmethodsformeasuringmassoffibrousmate-rials,refertoPracticeD2720.1.1.1Samplinginthistestmethodisprimarilyforuseinacceptancetestingratherthanproductioncontrol.manufac-turedfiberproducersusuallysampleforthecommercial“mass”ofproductonanon-goingbasisratherthaneachshipmenttoacustomer.1.2Commercialmasshasbeentraditionallybasedononeofthreeoptionsdependingonthestateofthematerial:(1)dried,unscouredyarn,staplefiber,tow,andsoforth,usingcommer-cialmoistureregaininthecalculations;(2)dried,scouredyarn,staplefiber,tow,andsoforth,usingcommercialmoistureregainvaluesinthecalculations;and(3)dried,scouredyarn,staplefiber,tow,andsoforth,usingacommercialallowanceagreeduponbetweenthepurchaserandthesupplierinthecalculations.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:D123TerminologyRelatingtoTextiles2D629TestMethodsforQuantitativeAnalysisofTextiles2D1909TableofCommercialMoistureRegainsforTextileFibers2D2257TestMethodforExtractableMatterinTextiles2D2258PracticeforSamplingYarnforTesting2D2720PracticeforCalculationofCommercialWeightandYieldofScouredWool,Top,andNoilforVariousCom-mercialCompositions2D3333PracticeforSamplingManufacturedStapleFibers,Sliver,orTowforTesting3D3888TerminologyRelatingtoOpen-EndSpinning3D3990TerminologyRelatingtoFabricDefects3D4849TerminologyRelatingtoFibersandYarns32.2AATCCStandard:150DimensionalChangesinAutomaticHomeLaunderingofWovenGarments43.Terminology3.1Definitions:3.1.1commercialallowance(CA),n—anarbitraryvalue,equaltothecommercialmoistureregain,plusaspecifiedallowanceforfinish,usedwiththemassofscoured,oven-driedyarn,tocompute(1)yarnlineardensity,(2)thecommercialorlegalmassofashipmentordeliveryofanyspecifictextilematerial(seealsocommercialmoistureregain),or(3)themassofaspecificcomponentintheanalysisoffiberblends.3.1.2commercialmass,n—billedmass(weight)asdeter-minedbyagenerallyacceptedmethodorasagreeduponbetweenthepurchaserandtheseller.3.1.2.1Discussion—Thebasisfordeterminingthecommer-cialmassofashipmentofyarnormanufacturedfibersisgenerallyoneofthefollowing:(1)CASBasis(commercialallowancewithscouredmaterial)—themassofoven-dryfiberoryarnafterscouringbydefiniteprescribedmethodsplusthemasscorrespondingtoitscommercialallowance.(2)CMRSBasis(commercialmoistureregainwithscouredmaterial)—themassofoven-dryfiberoryarnafterscouringbydefiniteprescribedmethodsplusthemasscorrespondingtoitscommercialmoistureregain.(3)CMRUBasis(commercialmoistureregainwithun-scouredmaterial)—themassofunscouredoven-dryfiberor1ThistestmethodisunderthejurisdictionofASTMCommitteeD13onTextilesandisthedirectresponsibilityofSubcommitteeD13.58onYarnTestMethods,General.CurrenteditionapprovedSept.10,2002.PublishedNovember2002.OriginallypublishedasD2494–66T.LastpreviouseditionD2494–96.2AnnualBookofASTMStandards,Vol07.01.3AnnualBookofASTMStandards,Vol07.02.4AvailablefromtheAmericanAssociationofTextileChemistsandColorists,P.O.Box12215,ResearchTrianglePark,NC27709.1Copyright©ASTMInternational,100BarrHarborDrive,POBoxC700,WestConshohocken,PA19428-2959,UnitedStates.yarnplusthemasscorrespondingtoitscommercialmoistureregain.(4)UNBasis(unadjustednet)—themassofunscouredfiberoryarnwithnoadjustmentfortheamountofmoistureorfinish,orboth.3.1.3commercialmoistureregain,(CMR),n—aformallyadopted,arbitraryvalue,tobeusedwiththeoven-driedmassoftextilefibers,whencalculatingthecommercialmassofashipmentordelivery.3.1.4Fordefinitionsofthetextiletermsshipmentandtareusedinthistestmethod,refertoTerminologyD4849.3.1.5Forthetermslaboratorysamplingunit,moisturecontent,andoven-dry,refertoTerminologyD123.3.1.6Forothertextiletermsusedinthistestmethod,refertoTerminologyD123,TerminologyD3888,TerminologyD3990,andTerminologyD4849.4.SummaryofTestMethod4.1Representativespecimensfromashipmentaredried,weighed,and,insomecases,scouredandweighedagain.Fromthenetmassoftheshipmentandthemassesofthespecimensbeforeandaftertreatment,commercialmassoftheshipmentiscalculatedusingoneofthefollowingoptions:4.1.1OptionI—CMRUbasistreatmentconsistsofdryingonly.Commercialmassincludesfinishesandacorrectionforcommercialmoistureregain.4.1.