Designation:D2612−99(Reapproved2011)StandardTestMethodforFiberCohesioninSliverandTop(StaticTests)1ThisstandardisissuedunderthefixeddesignationD2612;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethoddescribesthemeasurementoffibercohesionastheforcerequiredtocauseinitialdraftinginabundleoffibersinsliverandtop.Theobservedcohesiveforcerequiredtoseparatethefibersisconvertedtocohesivetenacitybasedonthelineardensityofthespecimen.NOTE1—Fordeterminationoffibercohesionindynamictests,refertoTestMethodD4120.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Inch-poundunitsappearinparenthesesforinforma-tiononly.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D76SpecificationforTensileTestingMachinesforTextilesD123TerminologyRelatingtoTextilesD1776PracticeforConditioningandTestingTextilesD2258PracticeforSamplingYarnforTestingD3333PracticeforSamplingManufacturedStapleFibers,Sliver,orTowforTestingD4120TestMethodforFiberCohesioninRoving,Sliver,andTopinDynamicTestsD4848TerminologyRelatedtoForce,DeformationandRelatedPropertiesofTextiles3.Terminology3.1Definitions:3.1.1cohesiveforce,n—insliverandtoptesting,theforcerequiredtoovercomecohesionofatestspecimenheldinafixedpositionbetweentwoslowlyseparatingclamps.3.1.1.1Discussion—Instatictests,cohesiveforceismea-suredwhileatestspecimenisheldinfixedpositionbetweentwoslowlyseparatingclamps.Indynamictests,cohesiveforceistheforcerequiredtomaintaindraftinginaroving,sliver,ortop.3.1.2fibercohesion,n—theresistancetoseparationoffibersincontactwithoneanother.3.1.2.1Discussion—Thisresis...
