Designation:D4168−95(Reapproved2015)StandardTestMethodsforTransmittedShockCharacteristicsofFoam-in-PlaceCushioningMaterials1ThisstandardisissuedunderthefixeddesignationD4168;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thesetestmethodsdeterminetheshock-absorbingchar-acteristicsoffoam-in-placepackagingmaterials.1.2TestMethodAusesafree-fallpackagedroptestappa-ratus.1.3TestMethodBusesashock-testapparatus.1.4Thevaluesstatedininch-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D996TerminologyofPackagingandDistributionEnviron-mentsD3332TestMethodsforMechanical-ShockFragilityofProducts,UsingShockMachinesD5276TestMethodforDropTestofLoadedContainersbyFreeFallD5487TestMethodforSimulatedDropofLoadedContain-ersbyShockMachines3.Terminology3.1Generaldefinitionsforpackaginganddistributionenvi-ronmentsarefoundinTerminologyD996.3.2Definitions:3.2.1acceleration—therateofchangeofvelocityofabodywithrespecttotime,measuredininchespersecondpersecond(metrespersecondpersecond).3.2.2velocity—therateofchangeofpositionofabodyinaspecifieddirectionwithrespecttotime,measuredininchespersecond(metrespersecond).3.3DefinitionsofTermsSpecifictoThisStandard:3.3.1equivalentfree-fallheight—thecalculatedheightoffreefallinavacuumrequiredforafallingbodytoattainameasuredorgivenimpactvelocity.3.3.2foam-in-placecushioningmaterial—amaterialthatisformedbydispensingchemicalcomponentswhichreactandexpand...
