VW2.8.1-2014-06

GroupstandardVW2.8.1Issue2014-06Class.No.:55152Descriptors:elastomer,rubber,elastomermaterial,DOTGElastomersMaterialsRequirementsandTestingPreviousissuesVW2.8.1:1960-08,1965-08,1970-04,1973-07,1974-11,1976-03,1978-10,1980-09,1989-09,1989-11,1997-06,2003-11,2007-03,2007-07,2007-12,2009-08,2009-12,2010-12,2011-02;VW2.8.1:2013-06,2014-01ChangesThefollowingchangeshavebeenmadetoVW2.8.1:2014-01:–Section3.9Ozoneresistance:Appendedanewparagraphtothefirstparagraph–Table1,consec.no.19:Compression40%addedScopeThepresentstandardcontainsmaterialsrequirementsandtestsforelastomermaterialsusedforcomponentsandtechnicalmoldedpartsinmotorvehicles(itdoesnotapplytovehicletires).RequirementsGeneralrequirementsApprovaloffirstsupplyandchangesasperVW01155.AvoidanceofhazardoussubstancesasperVW91101.Vulcanizationprocessfreefromdiorthotolylguanidine(DOTG)andfreefromitscleavageproduct,o-toluidine.122.1Alwaysusethelatestversionofthisstandard.Thiselectronicallygeneratedstandardisauthenticandvalidwithoutsignature.TheEnglishtranslationisbelievedtobeaccurate.Incaseofdiscrepancies,theGermanversionisaloneauthoritativeandcontrolling.Page1of18TechnicalresponsibilityTheStandardsdepartmentGQL-P/2PeterSchulzTel.:[phone]GQL-P/2Dr.LarsFölsterTel.:[phone]GQL-PDr.RogerHillertEKDV/4StefanieReissEKDVTel.:[phone]MaikGummertAllrightsreserved.NopartofthisdocumentmaybeprovidedtothirdpartiesorreproducedwithoutthepriorconsentofoneoftheVolkswagenGroup’sStandardsdepartments.©VolkswagenAktiengesellschaftVWNORM-2014-06a-patch1Page2VW2.8.1:2014-06Elastomerqualitiesaretestedoncomponents,componentsectionsor,inexceptionalcases,ontestplates(seesection3.1).Samplesmustalwaysmarkedwiththemanufacturer’squalitydesignationondelivery.Pleaseagreethenumberofpartsrequiredforlaboratoryevaluationwiththeappropriatematerialslaboratory.Deviationsfromthisstandardmustbeindicatedindrawingsandtestreports.PartswhosegradescannotbeclassifiedonthebasisofthisstandardrequireaseparateTechnicalSupplySpecification.EvaluationofthemeasurementresultsTherequirednumericalvaluesapplytoeachindividualmeasurement.SpecificationsintechnicaldocumentationDescriptionexampleforablack,fuel-resistantacrylonitrilebutadieneelastomerwithapreferredhardnessof75ShoreA:NBR,VW2.8.1–A,blackDescriptionexampleforablack,transmission-fluidresistantacrylateelastomerwithanoperationaltemperatureofmax.+100°Candahardnessof60ShoreA:ACM,VW2.8.1–E60,black,temperature+100°CDescriptionexampleforablackethylene-propyleneterpolymerthatisresistanttodaylight,weath‐er,ozone,andhotairuptoatemperatureof+100°C,featuringareboundresiliencebetween(35and55)%andahardnessof50ShoreA:EPDM,VW2.8.1–G50,black,ozoneresistant,reboundresilient50%,resistanttohotairupto+100°CMarkingasperVDA260Fortherecyclingofvehiclesandpowertrains,thecomponentsaremarkedasspecifiedinVDA260.ThecodesasperDINISO1629mustbeusedforthispurpose.ExamplesofcodesThelistofcodesbelowdoesnotclaimtobeexhaustive.RawpolymermaterialsforcomponentsmustalwaysbedesignatedasspecifiedinDINISO1629.ACMCopolymersconsistingofethylacrylate(orotheracrylateswithasmallfrac‐tionofamonomerthatfacilitatesvulcanization(normallyreferredtoasacrylaterubber)).AEMCopolymerconsistingofethylacrylate(orotheracrylates)andethyleneBRButadienerubberCMChlorinatedpolyethyleneCOPolychloromethaneoxirane(typicallyreferredtoasepichlorohydrinrubber)CRChloroprenerubberCSMChlorosulphonatedpolyethylenerubber2.22.32.42.4.1Page3VW2.8.1:2014-06ECOCopolymerconsistingofethyleneoxide(oxirane)andchloromethyloxirane(alsoreferredtoasepichlorohydrincopolymer,orepichlorohydrinrubber)EPDMTerpolymerconsistingofethylene,propyleneandadienewithanunsatura‐tedpartofthedieneinasidechainEPMEthylenepropylenecopolymerFKMFluorocarbonrubberwithfluorine,perfluorinealkylorperfluorinealkoxygroupsonthepolymerchainFVMQSiliconerubberwithmethyl,vinylandfluorinegroupsonthepolymerchainIIRIsobuteneisoprenerubber(typicallyreferredtoasbutylrubber)NBRAcrylonitrilebutadieneelastomerNRNaturalrubberSBRStyrenebutadienerubberVMQSiliconerubberwithmethylandvinylgroupsonthepolymerchainAppearanceThecomponentsmusthaveaflawlesssurfacetextureondelivery.Tackiness,inclusions,cavities,cracks,damage,etc.arenotpermissible.Componentcolor:seedrawing.Properties,gradeSeetable1andtable2.2.52.6Page4VW2.8.1:2014-06Table1ResistanttocontactmediumFuelOilTesttemperaturein°C(deviatingrequirementsasperdrawing)23±2≥(125±3)Therequiredtemperaturemustbeindicated.23±2TestmediumGasolineLimitedresist‐ancetogaso‐lineDieselfuelwith20volumeper‐centfattyacidmethylester(FAME)portionand100%FAMEasperDINEN14214EngineoilasperTL52185Hypoidtrans‐missionfluidandATFasperdrawingspecifi‐cationsOilasperdrawingspe‐cificationsLimitedresist‐ancetoengineoilasperTL52185GradeAWTCEPUSer.no.PropertiesFornotesontesting,see1Thermogravimetricanaly‐sisConstituentsin%PV3927and/orpyrolysisgaschromatographymassspectrometryasanidentificationtestAspersample2Densitying/cm3,DINENISO1183-1Aspersample3HardnessinShoreADINISO7619-1IRHDDINISO48(foro-rings)3.1Preferredhardnessinas-receivedconditionSection3.260±5or75±570±575±56