Designation:D2135-834CTbAMERICANSOCIETYFORTESTINGANDMATERIALSReprinfedfromtheAnnualBookofASTMStandards,CopyrightASTMIfnotlistedinthecurrentcombinedindex,willappearinthenextedition.1916RaceSt.,Philadelphia,Pa.19103StandardClassificationofHARDRUBBERS’ThisstandardisissuedunderthefixeddesignationD2135;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(E)indicatesaneditorialchangesincethelastrevisionorreapproval.l.Scope1.1Thisclassificationcoversthemechani-describestherequiredpropertylevelsofama-cal,electrical,andchemicalpropertiesofhardrubberproductspreparedfromneworre-claimednaturalandsyntheticrubber.1.2Thevaluesstatedineitheracceptablemetricunitsorinotherunitsshallberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents.Therefore,eachsystemmustbeusedindepend-entlyoftheother,withoutcombiningvaluesinanyotherway.2.ApplicableDocuments2.1ASTMSíandards:D149TestsforDielectricBreakdownVolt-ageandDielectricStrengthofElectricalInsulatingMaterialsatCommercialPowerFrequencies’D150TestsforA-CLossCharacteristicsandPermittivity(DielectricConstant)ofSolidElectricalInsulatingMaterials‘D256TestsforImpactResistanceofPlasticsandElectricalInsulatingMaterials’D257TestsforD-CResistanceorConduct-anceofInsulatingMaterials’D530TestingHardRubberProducts3D570TestforWaterAbsorptionofPlastics4D648TestforDeflectionTemperatureofD790TestforFlexuralPropertiesofPlasticsD2240TestforRubberProperty-Durom-D2707TestingHardRubberinTension3PlasticsUnderFlexuralLoad4andElectricalInsulatingMaterials4eterHardness33.SignificanceandUse3.1Thepurposeofthisclassificationistoprovideaconcise,easytousedesignation,that4.DescriptionsofTerms4.1HardRubberasusedhereinshallbeunderstoodtorefertocompositionshavingcombinedsulfurinexcessof15%.4.2Rubberasusedhereinshallbeunder-stoodtoincludepolybutadieneandpolyiso-preneandtheirrespectivecopolymers.4.3Prod...
