Designation:D4120−07(Reapproved2018)StandardTestMethodforFiberCohesioninRoving,Sliver,andTopinDynamicTests1ThisstandardisissuedunderthefixeddesignationD4120;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethoddescribesthemeasurementoffibercohesionasthedynamiccohesiveforcerequiredtomaintaindraftinginrovings,sliversortopswhentheyaresubjectedtostressinducedbypassingbetweenpairsofdraftingrollsofdifferentsurfacespeeds.Thecohesiveforceisconvertedtocohesivetenacitybasedonthelineardensityofthematerial.NOTE1—ForstatictestsrefertoTestMethodD2612.1.2Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.3Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D123TerminologyRelatingtoTextilesD519TestMethodforLengthofFiberinWoolTopD1440TestMethodforLengthandLengthDistributionofCottonFibers(ArrayMethod)D1447TestMethodforLengthandLengthUniformityofCottonFibersbyPhotoelectricMeasurementD1575TestMethodforFiberLengthofWoolinScouredWoolandinCardSliverD1776PracticeforConditioningandTestingTextilesD2258PracticeforSamplingYarnforTestingD2612TestMethodforFiberCohesioninSliverandTop(StaticTests)D3333PracticeforSamplingManufacturedStapleFibers,Sliver,orTowforTestingD4849TerminologyRelatedtoYarnsandFibers3.Terminology3.1ForallterminologyrelatingtoD13.58,YarnsandFibers,refertoTerminologyD4849.3.1.1Thefoll...
