Designation:D1056−14StandardSpecificationforFlexibleCellularMaterials—SpongeorExpandedRubber1,2ThisstandardisissuedunderthefixeddesignationD1056;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope*1.1Thisspecificationcoversflexiblecellularrubberprod-uctsknownasspongerubberandexpandedrubber,butdoesnotapplytolatexfoamrubberorebonitecellularrubber.Thebasematerialforanopen/closedcellularproductmaybemadeofsynthetic,natural,orreclaimedrubber,oramixture,andmaycontainotherpolymersorchemicals,orboth,whichmaybemodifiedbyorganicorinorganicadditives.Theseelasto-mericmaterialshavepropertiessimilartothoseofvulcanizedrubber,namely(1)theabilitytobeconvertedfromathermo-plastictoathermosettingstatebycrosslinking(vulcanization)or(2)thesubstantialrecoveryoftheiroriginalshapeswhenstrainedorelongated,orboth.1.2Extrudedormoldedshapesofsizestoosmallforcuttingstandardtestspecimensaredifficulttoclassifyortestbythesemethodsandwillusuallyrequirespecialtestingprocedures.1.3Incaseofconflictbetweentheprovisionsofthisgeneralspecificationandthoseofdetailedspecificationsortestmeth-odsforaparticularproduct,thelattershalltakeprecedence.Referencetothetestmethodsinthisspecificationshouldspecificallystatetheparticulartestortestsdesired.1.4Thevaluesstatedininch-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.1.5Thefollowingsafetyhazardscaveatpertainsonlytothetestmethodsportionsofthisspecification:Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimi...
