Designation:D3123−09(Reapproved2017)StandardTestMethodforSpiralFlowofLow-PressureThermosettingMoldingCompounds1ThisstandardisissuedunderthefixeddesignationD3123;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversaprocedureformeasuringthespiralflowofthermosettingmoldingcompounds(softorverysoft)designedformoldingpressuresunder6.9MPa(1000psi).Itisespeciallysuitedforthosecompoundsusedforencapsu-lationorotherlowpressuremoldingtechniques.Itinvolvestheuseofastandardspiralflowmoldinatransfermoldingpressunderspecifiedconditionsofappliedtemperatureandpressurewithacontrolledchargemass.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.NOTE1—ThereisnoknownISOequivalenttothistestmethod.1.4Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D883TerminologyRelatingtoPlasticsD958PracticeforDeterminingTemperaturesofStandardASTMMoldsforTestSpecimensofPlastics(Withdrawn1995)3E105PracticeforProbabilitySamplingofMaterials3.Terminology3.1Definitions—Definitionsinthistestmethodareconsis-tentwithTerminologyD883.4.SignificanceandUse4.1Thespiralflowofathermosettingmoldingcompoundisameasureofthecombinedcharacteristicsoffusionunderpressure,meltviscosity,andgelationrateunderspecificconditions.4.2Thistestmethodisusefulasaqualitycontroltestandasanacceptanc...
