Designation:D4466−02(Reapproved2012)StandardTerminologyRelatedtoMulticomponentTextileFibers1ThisstandardisissuedunderthefixeddesignationD4466;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Man-madepolymerscanbecombinedduringmanufacture,ornaturalpolymerscanbeformedduringgrowth,toproducemulticomponentfibershavingspecialpropertiessuchascrossdyeability,differentialshrinkage,orbulk.Thisstandardcontainstermswhichcanbeusedtodescribethephysicalarrangementofcomponentsofsuchfibers.TheschematicdiagraminAnnexA1providesaguideforinterpretingtheterminologyusedindescribingtwo-andthree-componentfibers,butisnotintendedtobelimiting.SomeexamplesofusagearegiveninAnnexA2,andabibliographyofrelatedliteratureisgiveninAppendixX1.1.2Fordefinitionsofothertextileterms,refertoTerminol-ogyD123.2.ReferencedDocuments2.1ASTMStandards:2D123TerminologyRelatingtoTextilesGenericClass3.Terminologygenericclass,n—asusedwithtextilefibers,agroupinghavingsimilarchemicalcompositionsorspecificchemicalcharac-teristics.DISCUSSION—IntheUnitedStates,thegenericnamesanddefinitionsofman-madefibers,suchasnylon,polyester,andacrylic,arepublishedbytheFederalTradeCommissionin“RulesandRegulationsUndertheTextileFiberProductsIdentificationAct.”Technically,fibersmaybebigeneric,trigeneric,etc.Componentspolymer,n—amacromolecularmaterialformedbythechemi-calcombinationofmonomershavingeitherthesameordifferentchemicalcomposition.component,n—asusedwithtextilefiberpolymers,apolymerwithdistinguishableproperties.bicomponentfiber,n—afiberconsistingoftwopolymerswhicharechemicallydifferentorphysicallydifferent,orboth.biconstituentfiber,n—deprecatedterm.Usethepreferredtermbicomponentbigenericfiber.DISCUSSION—AsusedintheFederalTradeCommission’s“RulesandRegulationsUndertheTextileFiberProductsIdentificationAct,”...
