Designation:D1242–95aStandardTestMethodsforResistanceofPlasticMaterialstoAbrasion1ThisstandardisissuedunderthefixeddesignationD1242;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheDepartmentofDefense.1.Scope1.1Thesetestmethodscoverthedeterminationoftheresistancetoabrasionofflatsurfacesofplasticmaterials,measuredintermsofvolumeloss,bytwodifferenttypesofabrasion-testingmachines,asfollows:1.1.1TestMethodA—Looseabrasive,and1.1.2TestMethodB—Bondedabrasiveonclothorpaper(abrasivetape).1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.NOTE1—ThereisnosimilarorequivalentISOstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:D618PracticeforConditioningPlasticsandElectricalInsulatingMaterialsforTesting2D883TerminologyRelatingtoPlastics2D4000ClassificationSystemforSpecifyingPlasticMate-rials3D4805TerminologyofPlasticsStandards4E11SpecificationforWire-ClothSievesforTestingPur-poses53.Terminology3.1Definitions—Fordefinitionsoftechnicaltermspertain-ingtoplasticsusedinthesetestmethods,seeTerminologyD883orTerminologyD4805.3.2DefinitionsofTermsSpecifictoThisStandard:3.2.1resistancetoabrasion—theabilityofamaterialtowithstandmechanicalactionsuchasrubbing,scraping,orerosion,thattendsprogressivelytoremovematerialfromitssurface.4.SignificanceandUse4.1Themeasurementoftheresistancetoabrasionofplasticmaterialsisverycomplex.Theresistancetoabrasionisaffectedbymanyfactorssuchasthephysicalpropertiesofthepolymericmaterial,particularlyhardness,resilien...
