Designation:D5308–92StandardTestMethodsforSemi-FlexibleCellularUrethanesforAutomotiveandSimilarEnergyAbsorptionApplications1ThisstandardisissuedunderthefixeddesignationD5308;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thesetestmethodsapplytoslab,bonded,andmoldedsemi-flexiblecellularproducts.Applicationsincludearmrest,instrumentpanel,A-post,etc.1.2Urethanefoammaybegenerallydefinedasanexpandedcellularproductproducedbytheinteractionofactivehydrogencompounds,water,andisocyanates.1.3Unlessspecificallystatedotherwisebetweenthesup-plierandthepurchaser,alltestsshallbemadeinaccordancewiththetestmethodsspecifiedinthefollowingsections:TestMethodSectionsADensityTest8–14BIndentationForceDeflectionTest—SpecifiedDeflection15–21CCompressionForceDeflectionTest22–28DConstantDeflectionCompressionSetTest29–36ETensionTest37–44FTearResistanceTest45–52GAdhesionTest53–58HResilience(BallRebound)Test59–66IVolumeChange67–72JSteamAutoclaving73–78KDryHeatAging79–84LStaining85–88MSolventResistance89–94NFogging95–98OColdImpact99–103PResistancetoAging104–108QHumidAging109–112RAcceleratedDryAging113–116SIndentationRecovery117–124TFlammability125AppendixesX1DefinitionsofTermsUsedtoDescribetheForce-DeflectionCurveofFlexibleUrethaneFoamX2SuggestedTestsforDeterminingCombustibilityofFlexibleUre-thaneFoam(Thecombustiontestsaregivenforinformationalpurposesonlyandarenotpartofthestandard.)1.4ThevaluesstatedinSIunitsaretoberegardedasthestandard.Valuesgiveninparenthesesareforinformationonly.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyproblems,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:D4...
