Designation:D4819−13(Reapproved2021)´1StandardSpecificationforFlexibleCellularMaterialsMadeFromPolyolefinPlastics1ThisstandardisissuedunderthefixeddesignationD4819;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ε1NOTE—ReapprovedandeditoriallyrevisedinJuly2021.1.Scope*1.1Thisspecificationappliestoflexibleclosed-cellmateri-alsmadefrompolyolefinplasticsandblendsofpolyolefinplasticsasdefinedinSection3.1.2Extrudedormoldedshapestoosmalltopermitthecuttingofstandardtestspecimensaredifficulttoclassifyortestbystandardtestmethodsandwillusuallyrequirespecialtestingproceduresortheuseofstandardtestsheets.1.3Incaseofconflictbetweentheprovisionsofthisspecificationandthoseofdetailedspecificationsforaparticu-larproduct,thelattershalltakeprecedence.Thesedetailedspecificationsfortheflexibleclosed-cellpolyolefinplasticfoamsshallstatetheparticulartestortestsdesired.1.4Incasesinvolvingrefereedecisions,SIunitsshallbeused.1.5ThisspecificationdoesnotcontaintestproceduresorvaluesforallthesuffixletterslistedinTable1andTable2.Wheretheprocedureisnotdescribedinthisspecificationorspeciallimitsaredesired,orboth,thetestproceduresandvaluesmustbearrangedbetweenthepurchaserandthesupplier.1.6ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.NOTE1—ThereisnoknownISOequivalenttothisstandard.1.7Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2C518TestMethodforSteady-StateThermalTransmissionPropertiesbyMeansoftheHeatFlowMeterApparatusD412TestMethodsforVulcanizedRubberandThermo...
