Designation:F1839−08(Reapproved2012)StandardSpecificationforRigidPolyurethaneFoamforUseasaStandardMaterialforTestingOrthopaedicDevicesandInstruments1ThisstandardisissuedunderthefixeddesignationF1839;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisspecificationcoversrigidunicellularpolyurethanefoamforuseasastandardmaterialforperformingmechanicaltestsutilizingorthopaedicdevicesorinstruments.Thespecifi-cationisapplicabletosheetsorblocksoffoam,orfoamthatismadebytheuserusingatwo-partliquidmixture.1.2Thisspecificationcoverspolyurethanefoammaterialthatisusedinthelaboratoryformechanicaltesting,asdescribedin1.1.Thesematerialsarenotintendedforimplan-tationintothehumanbody.1.3Thefoamdescribedhereinpossessesmechanicalprop-ertieswhichareontheorderofthosereportedforhumancancellousbone.SeeAppendixX1,Rationale,forfurtherinformationregardingtheappropriatenessofusingthespeci-fiedfoamasamodelforhumancancellousbone.1.4Thisspecificationcoverscompositionalrequirements,physicalrequirements,mechanicalrequirements,andtestmethodsforrigidpolyurethanefoaminthesolidfinalform.1.5Thisspecificationprovidesqualificationcriteriaforvendororend-userprocessesandacceptancecriteriaforindividualmateriallots.1.6Thisspecificationprovidesmechanicalpropertiesoffivedifferentgradesoffoaminthesolidfinalform.Afoamthatdoesnotmeetthespecifiedmechanicalpropertiesshallbeidentifiedasanungradedfoam.1.7ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.8Thefollowingprecautionarystatementpertainstothetestmethodportiononly,Section8,ofthisspecification:Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabil...
