Designation:D5461−06(Reapproved2012)StandardTestMethodforRubberCompoundingMaterials—WetSieveAnalysisofPowderedRubberCompoundingMaterials1ThisstandardisissuedunderthefixeddesignationD5461;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversaprocedureforthequalitativeevaluationofaggregatesizeandaggregatesizedistributionofpowderedrubberacceleratorsandothercompoundingmateri-alswhichareinsolubleinwater.1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.Terminology2.1Definitions:2.1.1aggregate—aclusterofindividualparticlesmakingupthemassofthematerial.2.1.2aggregatesizedistribution—thedistributionofaggre-gatesobtainedbypassingwettedrubberchemicalsthroughstackedsievesofknownmeshwhicharearrangedinorderofdecreasingsize.3.SummaryofTestMethod3.1Asampleofpowderedrubberchemicaliswettedwithadiluteaqueoussolutionofsoapanddefoamer.Thesampleistransportedbywaterflowthroughstackedsievesarrangedinorderofdecreasingmeshsize.Thematerialretainedonthefaceofeachsieveisdriedinanoven.Thedrymassofretainedmaterialisobtainedforeachsieve.Thepercentretainedmaterialiscalculatedonthebasisoforiginalsamplemass.Individualmassesandpercentagesaresummedtoevaluatetheaggregatesizedistributionforthesample.4.SignificanceandUse4.1Thistestmethodisusedtoevaluatethesuitabilityofpowderedrubberchemicals,particularlyaccelerators,foruseinrubbercompoundsthatrequireverysmallparticleclusterstoachieveauniformcross-linkednetwork.Thistestmethodisintendedtobeusedtoensurethatnoexcessivelylargepart...
