Designation:D5990−20aStandardClassificationSystemandBasisforPolyketoneInjectionMoldingandExtrusionMaterials(PK)1ThisstandardisissuedunderthefixeddesignationD5990;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thisclassificationsystemcoverspolyketonematerialssuitableforinjectionmoldingandextrusion.Thisclassificationsystemdoesnotaddressrecycledpolyketonematerials.1.2Thepropertiesincludedinthisclassificationsystemarethoserequiredtoidentifythecompositionscovered.OtherrequirementsnecessarytoidentifyparticularcharacteristicsimportanttospecializedapplicationsaretobespecifiedbyusingsuffixesasgiveninSection5.1.3Thisclassificationsystemandsubsequentlinecallout(specification)areintendedtoprovideameansofcallingoutplasticmaterialsusedinthefabricationofenditemsorparts.Itisnotintendedfortheselectionofmaterials.Materialselectionshouldbemadebythosehavingexpertiseintheplasticfieldaftercarefulconsiderationofthedesignandtheperformancerequiredofthepart,theenvironmenttowhichitwillbeexposed,thefabricationprocesstobeemployed,thecostsinvolved,andtheinherentpropertiesofthematerialotherthanthosecoveredbythisclassificationsystem.1.4Thefollowingprecautionarycaveatpertainsonlytothetestmethodportion,Section11,ofthisclassificationsystem:Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafety,health,andenvironmentalpracticesanddeterminetheappli-cabilityofregulatorylimitationspriortouse.NOTE1—ThisclassificationsystemandISO21970-1andISO21970-2addressthesamesubjectmatter,butdifferintechnicalcontent.1.5Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStanda...
