Designation:D8336−21StandardTestMethodforCharacterizingTackofPrepregsUsingaContinuousApplication-and-PeelProcedure1ThisstandardisissuedunderthefixeddesignationD8336;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversmeasurementofadhesion(tack)betweenpartiallycured(B-staged)compositeprepregandasubstrateinapeeltest,underspecifiedconditions.Thetestmaybeconductedtomeasuretackbetweenaflexiblelayerofprepregandanotherprepreglayerbondedtoarigidsubstrate(MethodI)orarigidmetalsubstrate(MethodII).Thistestmethodisprimarilygearedtowardsmaterialcharacterizationforautomatedmateriallayupbutcanbemodifiedforusewithotherprocesses.Itiswellknownthatmaterialtackisafunctionofmultipleprocessingandenvironmentalvariables.Permis-siblecompositeprepregmaterialsincludecarbon,glass,andaramidfiberswithinaB-stagedthermosetresin.1.2Measuredtackisspecifiedintermsofapeelforceatagivenspecimenwidth.1.3Units—ThevaluesstatedinSIunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesafterSIunitsareprovidedforinformationonlyandarenotconsideredstandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.5Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2A480/A480MSpecificationforGeneralRequirementsforFlat-RolledStainlessandHeat-ResistingSteelPlate,Sheet,andStripD883TerminologyRelatingtoPlasticsD1781T...
