Designation:D5138−11StandardClassificationSystemandBasisforSpecificationforLiquidCrystalPolymersMoldingandExtrusionMaterials(LCP)1ThisstandardisissuedunderthefixeddesignationD5138;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thisclassificationsystemcoversliquidcrystalpoly-meric(LCP)materialssuitableforinjectionmoldingandextrusion.Thisclassificationsystemallowstheuseofliquidcrystalpolymersthatarerecycled,reconstituted,recycled-regrind,recovered,orreprocessed,oracombinationthereof,providedthattherequirementsasstatedinthisclassificationsystemaremet.Itistheresponsibilityofthesupplierandthebuyerofliquidcrystalpolymersthatarerecycled,reconstituted,recycled-regrind,recovered,orreprocessed,oracombinationthereof,toensurecompliance.1.2Thepropertiesincludedinthisclassificationsystemarethoserequiredtoidentifythecompositionscovered.Otherrequirementsnecessarytoidentifyparticularcharacteristicsimportanttospecializedapplicationsareallowed.Theseshallbeagreeduponbetweentheuserandthesupplier,byusingsuffixesasgiveninSection5.1.3Thisclassificationsystemandsubsequentlinecallout(specification)areintendedtobeameansofcallingoutplasticmaterialsusedinthefabricationofend-useitemsorparts.Itisnotintendedfortheselectionofmaterials.Materialselectioncanbemadebythosehavingexpertiseintheplasticsfieldaftercarefulconsiderationofthedesignandtheperformancerequiredofthepart,theenvironmenttowhichitwillbeexposed,thefabricationprocesstobeemployed,thecostsinvolved,andtheinherentpropertiesofthematerialotherthanthosecoveredbythisclassificationsystem.1.4ThevaluesstatedinSIunitsaretoberegardedasstandard.1.5Thefollowingprecautionarycaveatpertainsonlytothetestmethodportion,Section11,ofthisclassificationsystem:Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse...
