Designation:D4745−14StandardClassificationSystemandBasisforSpecificationforFilledPolytetrafluoroethlyene(PTFE)MoldingandExtrusionMaterialsUsingASTMMethods1ThisstandardisissuedunderthefixeddesignationD4745;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thisstandardclassificationsystemandbasisforspeci-ficationcoverspolytetrafluoroethylene(PTFE)filledmoldingcompoundsmadewithvirginPTFEresinsdefinedinSpecifi-cationD4894,asTypesIIandIII.NOTE1—ThissystemcanbeusedasamodelforotherPTFEcompoundshavingparticulatefillersthatcansurvivethesinteringtemperaturesofPTFEascanthoselistedinthisstandard.ThissystemisrestrictedtovirginPTFEbaseresinfortechnicalreasons.Recycledorreprocessedmaterialcannotbeprocessedsuccessfully.NOTE2—Thepropertiesmeasuredoncommerciallyfabricatedpartsmaydifferfromthelistedvaluesforsamplespreparedbytheproceduresgiveninthisspecification,dependingonpartgeometryandprocessingparameters.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.1.3Thefollowingstatementappliestothetestmethodportion,Section11,ofthisspecification:Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.SeeNote5foraspecificwarningstatement.NOTE3—ThereisnoknownISOequivalenttothisstandard.2.ReferencedDocuments2.1ASTMStandards:2D792TestMethodsforDensityandSpecificGravity(Rela-tiveDensity)ofPlasticsbyDisplacementD883TerminologyRelatingtoPlasticsD1600TerminologyforAbbreviatedTermsRelatingtoPlas-ticsD1708TestMethodforTensilePropertiesofPlasticsbyUseofMicrotensileSpecimensD3892PracticeforPackaging/PackingofPlasticsD4894SpecificationforPolytetrafluoroethylene(PTFE)GranularMoldingandRamExtrusionMateria...
