Designation:D3574−11StandardTestMethodsforFlexibleCellularMaterials—Slab,Bonded,andMoldedUrethaneFoams1ThisstandardisissuedunderthefixeddesignationD3574;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope*1.1Thesetestmethodsapplytoslab,bonded,andmoldedflexiblecellularproductsknownasurethanefoams.Urethanefoamisgenerallydefinedasanexpandedcellularproductproducedbytheinteractionofactivehydrogencompounds,water,andisocyanates.1.2Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.NOTE1—ThereisnoknownISOequivalenttothisstandard,howevercertaintestmethodsinthisstandardhavesimilarorequivalentISOstandardsandarelistedinthescopeoftheindividualtestmethodsections.2.ReferencedDocuments2.1ASTMStandards:2D412TestMethodsforVulcanizedRubberandThermoplas-ticElastomers—TensionD624TestMethodforTearStrengthofConventionalVul-canizedRubberandThermoplasticElastomersD737TestMethodforAirPermeabilityofTextileFabricsD3576TestMethodforCellSizeofRigidCellularPlasticsD3675TestMethodforSurfaceFlammabilityofFlexibleCellularMaterialsUsingaRadiantHeatEnergySourceE162TestMethodforSurfaceFlammabilityofMaterialsUsingaRadiantHeatEnergySourceE662TestMethodforSpecificOpticalDensityofSmokeGeneratedbySolidMaterialsE691PracticeforConductinganInterlaboratoryStudytoDeterminethePrecisionofaTestMethod3.Terminology3.1DefinitionsofTermsSpecifictoThisStandard:3.1.1bondedfoam—aproductproducedbytheadhesionofsmallpiecesofurethanefoamtoeachotherwithasuitablebondingagent.3.1.2core—theinternalportion...
