Designation:D1238−20StandardTestMethodforMeltFlowRatesofThermoplasticsbyExtrusionPlastometer1ThisstandardisissuedunderthefixeddesignationD1238;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope*1.1Thistestmethodcoversthedeterminationoftherateofextrusionofmoltenthermoplasticresinsusinganextrusionplastometer.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.NOTE1—ThisstandardandISO1133addressthesamesubjectmatter,butdifferintechnicalcontent.1.4Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D618PracticeforConditioningPlasticsforTestingD883TerminologyRelatingtoPlasticsD3364TestMethodforFlowRatesforPoly(VinylChloride)withMolecularStructuralImplicationsD4000ClassificationSystemforSpecifyingPlasticMateri-alsD5947TestMethodsforPhysicalDimensionsofSolidPlasticsSpecimensE456TerminologyRelatingtoQualityandStatisticsE691PracticeforConductinganInterlaboratoryStudytoDeterminethePrecisionofaTestMethod2.2ANSIStandard:B46.1onSurfaceTexture32.3ISOStandard:ISO1133DeterminationoftheMelt-MassFlowRate(MFR)andtheMeltVolume-FlowRate(MVR)ofThermoplas-tics33.Terminology3.1TermsusedinthisstandardaredefinedinaccordancewithTerminologyD883,unlessotherwisespecified.Fortermsrelatingtopreci...
