Designation:D4969−17(Reapproved2022)StandardSpecificationforPolytetrafluoroethylene–(PTFE)CoatedGlassFabric1ThisstandardisissuedunderthefixeddesignationD4969;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisspecificationcoversglassfabricimpregnated,coated,andsinteredonbothsideswithPTFEtoanominalthicknessof0.318mm(0.015in.)orless.1.2ThePTFE-coatedglassfabricisforelectrical,chemical,andmechanicaluses.1.3ThePTFE-coatedglassfabricofthisspecificationdoesnotpertaintostructuralfabric,single-sidedPTFEcoatings,ormaterialsusedforlaminates.1.4ThevaluesstatedinSIunitsasdetailedinIEEE/ASTMSI-10.NOTE1—ThereisnoISOstandardthatcoversinformationincludedinthisspecification.ThedielectrictestismentionedinISO12086-2andISO13000-1and-2.1.5Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D123TerminologyRelatingtoTextilesD149TestMethodforDielectricBreakdownVoltageandDielectricStrengthofSolidElectricalInsulatingMaterialsatCommercialPowerFrequenciesD257TestMethodsforDCResistanceorConductanceofInsulatingMaterialsD374TestMethodsforThicknessofSolidElectricalInsu-lation(Metric)D0374_D0374MD579SpecificationforGreigeWovenGlassFabricsD618PracticeforConditioningPlasticsforTestingD737TestMethodforAirPermeabilityofTextileFabricsD751TestMethodsforCoatedFabricsD883TerminologyRelatingtoPlasticsD902TestMethodsforFlexibleResin-CoatedGlassFabricsandGlassFabricTapesUsedforElectricalInsulation(Withdrawn2020)3D1424TestMethodforTearingStrengthofFabricsbyFalling-Pendulum(Elmendorf-Type)ApparatusD3892PracticeforPackaging/Pa...
