Designation:D5857−15StandardSpecificationforPolypropyleneInjectionandExtrusionMaterialsUsingISOProtocolandMethodology1ThisstandardisissuedunderthefixeddesignationD5857;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.INTRODUCTIONThismaterialspecificationisintendedtoprovideacalloutsystemforpolypropyleneutilizingspecimenpreparationproceduresandtestmethodbasedonISOstandards.Thisspecificationisnotintendedforthedeterminationofthesuitabilityofperformanceofmaterialsinthefinalapplication.Selectionofthesematerialsistobemadebypersonnelwithexpertiseintheplasticsfieldinwhichtheenvironment,inherentpropertiesofthematerials,performanceoftheparts,partdesign,manufacturingprocess,andeconomicsareconsidered.1.Scope*1.1Thisspecificationcoverspolypropylenematerialssuit-ableforinjectionmoldingandextrusion.Polymersconsistofpolypropylenehomopolymers,polypropylenecopolymers,andpolypropylene-elastomercompoundsproducedwithorwithouttheadditionofimpactmodifiers(ethylene-propylenerubber,polyisobutylenerubber,andbutylrubber,andsoforth),colorants,stabilizers,lubricants,fillers,orreinforcements.1.2Thisspecificationallowsfortheuseofthosepolypro-pylenematerialsthatcanberecycled,reconstituted,andreground,providedthatthefollowingconditionsaremet:1.2.1TherequirementsasstatedinthisspecificationandotherISOguidelinespertainingtothesetypesofmaterialsaremet,and1.2.2Thematerialhasnotbeenmodifiedinanywaytoalteritsconformancetofoodcontactregulationsorsimilarrequire-ments.1.3Theproportionsofrecycled,reconstituted,andregrindmaterialused,aswellasthenatureandtheamountofanycontaminant,cannotbepracticallycoveredinthisspecifica-tion.Itistheresponsibilityofthesupplierandbuyerofrecycled,reconstituted,andregrindmaterialstoensurecom-pliance.1.4Thepropertiesincludedinthisclassificationsystemarethoserequiredtoidentif...
