Designation:D7486−14StandardTestMethodforMeasurementofFinesandDustParticlesonPlasticPelletsbyWetAnalysis1ThisstandardisissuedunderthefixeddesignationD7486;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thistestmethodmeasurestheamountoffineparticlesadheredonplasticpelletsorgranulesinwhichtheyarecommonlyproducedandsupplied.Thelowerlimitofthistestmethodisrestrictedonlybytheporosityofthefilterdiscusedtocapturetheparticlesizebeingquantified.1.2Thewetanalysistechniqueallowsforseparationandcollectionofstaticallychargedparticlesbyliquidwashandfiltrationmethods.Thismustbeperformedunderstandardlaboratoryconditions.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.1.4Thistestmethoddescribesanessentialpracticetocheckthequalityofplasticsoncetheproductioncycleisterminatedandtoevaluatetheperformanceofpelletcleaningsystemsorofthespecialpneumaticconveyingsystemsforthedistinctsizefractionsbelow500micrononly.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.NOTE1—ThereisnoknownISOequivalenttothisstandard.2.ReferencedDocuments2.1ASTMStandards:2D883TerminologyRelatingtoPlasticsD1921TestMethodsforParticleSize(SieveAnalysis)ofPlasticMaterialsE11SpecificationforWovenWireTestSieveClothandTestSieves2.2FEMStandards:3FEM2482TestMethodtoDetermineContentofFinesandStreamersinPlasticPellets.3.Terminology3.1Definitions—Fordefinitionsoftermsassociatedwithplasticmaterials,seeTerminologyD883.3.2DefinitionsofTermsSpecifictoThisStandard:3.2.1fines—fines(Dust)aresmallparticlesofplasticwhichhavebeentornawayfromtheoriginalpelletbycontactwitharoughsurfaceandfrictionathighconveyingvelocities.T...
