Designation:D2433–93(Reapproved2002)StandardTestMethodsforRubberThread1ThisstandardisissuedunderthefixeddesignationD2433;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thesetestmethodscoverthetestingofbothroundextrudedlatexandrectangularcutrubberthreadproductsinwhichthebasematerialusedinmanufacturemaybenaturalrubberorsyntheticrubber,aloneorincombination.Thesetestsaretobemadeonlyonthebareuncoveredrubberthread.1.2Owingtothecomparativelysmallcrosssectionofthematerialandalsobecauseoftheunusualconditionsofserviceofthismaterial,certainspecialtestmethodshavebeendevel-opedandtaketheplaceofthetestsforotherrubberproducts.1.3Comparisonsmayonlybemadeonnewrubberthreadsorthoseofidenticalprocessinghistories.Intheinterpretationofresultsfromthreadswhichhavebeensubjectedtospooling,fabrication,orotherprocess,theprevioushistoryisimportant,andwhatisknownofthisandanyrelaxationtreatmentsusedshouldbestated.1.4Thetestmethodsappearinthefollowingsections:SectionsDensity7-11Count12-16MetricYield(LengthperUnitWeight)17-19TensileStrength20-22ElongationatBreak23and24StressatPredeterminedElongation25-27ElongationUnderFixedForce(MethodA)28-30ElongationUnderFixedForce(MethodB)31-34StressRetention35-391.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:D1566TerminologyRelatingtoRubber2D4483PracticeforDeterminingPrecisionforTestMethodStandardsintheRubberandCarbonBlackIndustries2E171SpecificationforStandardAtmospheresforCondi-tioningandTestingFlexibleBarrierMaterials33.SignificanceandUse3.1Foradequateserviceperformance,rubberthreadsmustbetestedbyappropriatetes...
