Designation:D5336−21StandardClassificationSystemandBasisforSpecificationforPolyphthalamide(PPA)InjectionMoldingMaterials1ThisstandardisissuedunderthefixeddesignationD5336;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thisclassificationsystemcoverspolyphthalamide(PPA)materialssuitableforinjectionmolding.1.2Thepropertiesincludedinthisclassificationsystemarethoserequiredtoidentifythecompositionscovered.OtherrequirementsnecessarytoidentifyparticularcharacteristicsimportanttospecializedapplicationsaretobespecifiedbyusingsuffixesasgiveninSection5.1.3Thisclassificationsystemallowsfortheuseofrecycledmaterialsprovidedthatallspecificationrequirementsaremet.1.4Thisclassificationsystemisintendedtobeameansofcallingoutplasticsmaterialsusedinthefabricationofenditemsorparts.Itisnotintendedfortheselectionofmaterials.Materialselectioncanbemadebythosehavingexpertiseintheplasticsfieldonlyaftercarefulconsiderationofthedesignandtheperformancerequiredofthepart,theenvironmenttowhichitwillbeexposed,thefabricationprocesstobeemployed,thecostsinvolved,andtheinherentpropertiesofthematerialotherthanthosecoveredbythisclassificationsystem.1.5ThevaluesstatedinSIunitsaretoberegardedasthestandard(seeIEEE/ASTMSI-10).Thevaluesgiveninparen-thesesareforinformationonly.1.6Thefollowingprecautionarycaveatpertainsonlytothetestmethodsportion,Section11,ofthisclassificationsystem:Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafety,health,andenvironmentalpracticesanddeterminetheappli-cabilityofregulatorylimitationspriortouse.Specificprecau-tionarystatementsaregivenin11.7.1.NOTE1—ThereisnoknownISOequivalenttothisstandard.ISO16936-1⁄-2forpolyamidesmayalsobeusedtodescribeandclassifythese...
