Designation:D7340−07(Reapproved2018)´1StandardPracticeforThermalConductivityofLeather1ThisstandardisissuedunderthefixeddesignationD7340;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ε1NOTE—In9.4.3,[D]2xwaseditoriallycorrectedto[D]2xinNovember2020.1.Scope1.1Thispracticeisintendedtodeterminethethermalconductivityofasheetmaterial.Thispracticeisnotlimitedtoleather,butmaybeusedforanypoorlyconductivematerialsuchasrubber,textileandcorkassociatedwiththeconstruc-tionofshoes.1.2Aconstantheatsourceissandwichedbetweentwoidenticalmetalcylinderswhicharemountedwiththeiraxesvertical.Atestspecimenisplacedonthetopsurfaceoftheuppercylinderandathirdidenticalmetalcylinderisplacedontopofthetestspecimensothatallthecylindersandthetestspecimenareconcentricallyaligned(seeFig.1).Theheatsourceisswitchedonandthetemperaturesofthethreeblocksallowedtoreachequilibrium.Thethermalconductivityofthetestspecimenisthendeterminedfromthesteady-statetem-peraturesofthethreeblocks,theexposedsurfaceareasoftheblocksandtestspecimenandthethicknessofthetestspeci-men.1.3Thispracticedoesnotapplytowetblue.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.5Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D1610PracticeforConditioningLeatherandLeatherProd-uctsforTestingD1813TestMethodforMeasuringThicknessofLeatherTestSpecimens2.2Other...
