Designation:D991−89(Reapproved2020)StandardTestMethodforRubberProperty—VolumeResistivityOfElectricallyConductiveandAntistaticProducts1ThisstandardisissuedunderthefixeddesignationD991;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope1.1Thistestmethodcoversthedeterminationofvolumeresistivityofrubbersusedinelectricallyconductiveandantistaticproducts.1.2Thistestmethodassumesthatthesurfaceconductivityisnegligiblecomparedwiththeconductivitythroughthespecimen.1.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.5Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D3182PracticeforRubber—Materials,Equipment,andPro-ceduresforMixingStandardCompoundsandPreparingStandardVulcanizedSheetsD4483PracticeforEvaluatingPrecisionforTestMethodStandardsintheRubberandCarbonBlackManufacturingIndustries3.Terminology3.1DefinitionsofTermsSpecifictoThisStandard:3.1.1rubberproduct,antistatic—arubberproductsuffi-cientlyconductivetopreventabuild-upofanelectricalchargeonthesurfaceandsufficientlyinsulatingtopreventanelectri-calhazard.3.1.1.1Discussion—Generally,antistaticrubberproductsareconsideredtohavearesistanceof104to108Ω.3.1.2rubberprod...
