saej948v002

SAETechnicalStandardsBoardRulesprovidethat:“ThisreportispublishedbySAEtoadvancethestateoftechnicalandengineeringsciences.Theuseofthisreportisentirelyvoluntary,anditsapplicabilityandsuitabilityforanyparticularuse,includinganypatentinfringementarisingtherefrom,isthesoleresponsibilityoftheuser.”SAEreviewseachtechnicalreportatleasteveryfiveyearsatwhichtimeitmaybereaffirmed,revised,orcancelled.SAEinvitesyourwrittencommentsandsuggestions.Copyright©2003SAEInternationalAllrightsreserved.Nopartofthispublicationmaybereproduced,storedinaretrievalsystemortransmitted,inanyformorbyanymeans,electronic,mechanical,photocopying,recording,orotherwise,withoutthepriorwrittenpermissionofSAE.TOPLACEADOCUMENTORDER:Tel:877-606-7323(insideUSAandCanada)Tel:724-776-4970(outsideUSA)Fax:724-776-0790Email:custsvc@sae.orgSAEWEBADDRESS:http://www.sae.orgSURFACEVEHICLESTANDARDJ948REV.DEC2003Issued1966-06Revised2003-12SupersedingJ948AUG1994TestMethodforDeterminingResistancetoAbrasionofAutomotiveBodycloth,Vinyl,andLeather,andtheSnaggingofAutomotiveBodyclothForewordNOTE—Therearetwodifferenttestsforwearinthisprocedureandtheyarenotequivalent.Theresultsfromthetwotestmethods(3.Taberand4.Wyzenbeek)cannotbecompared.1.Scope—Thesemethodsoftestareapplicablefordeterminingtheresistancetosnaggingandabrasionofautomotivebodycloth,vinylandleather.2.References—Therearenoreferencedpublicationsspecifiedherein.3.TaberMethod3.1MaterialsandEquipmentRequired3.1.1TABERABRASERMODELNO.5150COMPLETEWITHVACUUMACCESSORYOREQUIVALENT3.1.2H-18WHEELSOREQUIVALENT(FORSNAGGINGTEST)3.1.3CS-10WHEELSOREQUIVALENT(FORABRASIONTEST)3.1.4DIAMONDWHEELDRESSER3.1.5S-11ABRASIVEPAPEROREQUIVALENT3.1.6CAMEL'SHAIRBRUSH3.2TestSpecimens—Testspecimensarepreparedbyfoldinga108x108mmspecimen(orequivalentcircularspecimen)onceineachdirectionandthenclippingthefoldedpointtoproduceasmallcentralholetofitovertheturntableclampingscrew.Specimensarethenconditionedat21°C±2°Cand50%±5%relativehumidityfor24h.Unlessotherwisespecifiedspecimensshallbetakennonearertheselvageedgethan1/10thewidthofthematerial.SAEJ948RevisedDEC2003-2-3.3Procedurea.MounttherefacingdischolderontheTaberAbraserandfastentothedischolderapieceofS-11typeabrasivepaper.b.Adjusttestinstrumentfora1000gload.Loosentheknurledcapnutsandinstallthenewsetofwheelsontheirrespectiveflangedholdersasindicatedbytheprintingonthesideofthewheel.Theonemarkedrightsidefitsontheright-handmountingwithprintedsideout;thesamewiththeleft.Thenutisthenreplacedandmoderatelytightened.Checkthewheelsforalignment.H-18typewheelsshallbeusedwhentestingsnaggingresistanceandCS-10typewheelsshallbeusedwhentestingabrasionresistance.c.Refaceabrasivewheels25cyclesbyrunningthemagainsttheS-11typeabrasivepaperdiscmountedontherefacingdischolder.Removeanyroughedgesonthewheelsbymanuallysandinglightlywiththeabrasivepaper.d.Thewheelsmustberefacedbeforeeachtestruntoremoveabradedmaterialsfromthewheelsthatcollectedinthepriortest.e.Ifthewheelsarewornoutofround,crowned,orexcessivelycloggedwithabradedmaterial,theyshouldbedressedusingthediamondrefaceruntiltheconditioniscorrected.Incasesofdoubtabouttheconditionoftheabrasivewheels,newwheelsshallbeused.f.Dusttherefacedabrasivewheelswithasmallcamel'shairbrushandremovetherefacingdischolder.g.Withspecimenturntableremovedfromtheabraser,placetestspecimenontheturntable.Adjusttheclampingringtoatightfitoverthespecimenandholderandpressthehold-downringoverthecircumferenceoftheholdertopullthetestmaterialtaut.h.Removeanywrinklesinthetestspecimenbyadjustingthefabricedgeswhichextendbelowtheclampingring.Then,tightentheadjustingscrewofthering.Placethewasherovertheturntablescrewandtightenthenut.Trimofftheexcesstestspecimenwhichextendsbeyondtheloweredgeoftheclampingring.i.Lowertheabrasivewheelscarefullyfromtheiruprightpositiontothesurfaceofthetestspecimen.Setthecountermechanismatzero.j.Positionthevacuumnozzlealongthediameteroftheturntable3mmabovethesurfaceofthetestspecimenandsetthevacuumdialintherangeof60to70.k.TurnonthevacuumandstarttheTaberAbraser.l.Runthespecimenthenumberofcyclesspecifiedandremoveforevaluation.m.400cyclesshallberunforsnaggingunlessotherwisespecified.n.1000cyclesshallberunforabrasionofbodyclothunlessotherwisespecified.4.WyzenbeekMethod—TheWyzenbeekmethodcanbeusedtodeterminetheresistancetoabrasionofautomotivevinylandleather.4.1ApparatusandMaterialRequired4.1.1WYZENBEEKWEARTESTEROREQUIVALENT—Thehardnessoftherubberpadsshouldremainbetween55to75whentestedwithatype"00"durometerontheflatsurfaces.Rubberpadswhichdonotfitsnuglyintheirrespectiveholdersshouldbereplaced.Duetomisalignmentorwearduringuse,thefollowingprocedureshouldbeperformedwhennecessary;aftercleaningthedrumsurfacewithasolvent,insertapieceof36gritsandpaperandclampintoposition.Lowerthearmsremovingallappliedpressureandabradetherubberpadfor400cyclesoruntiltheyconformtotheshapeofthedrum.Cleantheresurfacedrubberpadwithastiffbrushandre-insertinthesameholderandinthesameposition.Oncearubberpadhasbeenputthroughthisproceduredonotuseinanyotherholderwithoutresurfacing.SAEJ948RevisedDEC2003-3-4.1.2100%CottonWarpSateenFabric;Count104X55,214g/m2orEquivalent4.1.3DOUBLE-FACEDTAPE—3M—No.400orequivalent.4.1.4MASKINGTAPE,76MMWIDE.4.2TestSpecimens—Testspecimens63.5x230mmarepreparedtotemplate(seeFigure1)sizeinbothwarpandfilldirections.Conditionthetestspecimensforaminimumof16hat21°C±2°Cand50%±5%relativehumidity.Unlessotherwisespecified,samplesshallbetakennonearertheselvageedgethanonetenth(1/10)thewidthofthematerial.Allmaterialsotherthanrigid,nonstretchmaterials,shallhavethebackofthetestspecimencompletelycoveredwith76mmmaskingtape.4.3Procedure4.3.1Cuttheabradent241(warp)x305(fill)mmandapplyonelengthofdouble-backedtapeinthemiddle,onthebacksideoftheabradent,paralleltothefilldirection.Thelongfloatsareonthefacesideoftheabradent.4.3.1.1Stripthecoveredsideofthedouble-backedtapeandclampthefabriconthedruminsuchamannerthatthewarpdirectionisparalleltomotionofthedrum.Whenpressingdownonthetapedportionofthefabric,makesurethereisgoodanduniformadhesionbetweenthedrum,thetape,andthefabric.Also,thistapedareamustbecompletelyfreefromwrinkles.4.3.2Placethespecimenintheclampswiththelongdimensionparalleltothedirectionofabrasion.4.3.3Drawthespecimentightenoughtobringtheweightedtensionscalebarintoahorizontalpositionusinga1.8kgdeadweightload.NOTE—Ifthespecimenstretchesduringthetest,bringthescalebarbackintoahorizontalpositionbyadjustingthescrewbehindtherearclamp.4.3.4Settheweightonthepressurebarat1.35kg.4.3.5Setthecountertozero.4.3.6Abradethespecimenfortherequirednumberofcycles.4.3.7Removethespecimenfromtheweartesterforevaluation.4.3.8Changetheabradentforeachsetofspecimens.SAEJ948RevisedDEC2003-4-FIGURE1—TESTSPECIMEN5.Notes5.1MarginalIndicia—Thechangebar(l)locatedintheleftmarginisfortheconvenienceoftheuserinlocatingareaswheretechnicalrevisionshavebeenmadetothepreviousissueofthereport.An(R)symboltotheleftofthedocumenttitleindicatesacompleterevisionofthereport.PREPAREDBYTHESAETEXTILESANDFLEXIBLEPLASTICSCOMMITTEESAEJ948RevisedDEC2003Rationale—Addnote:“Note:Therearetwodifferenttestsforwearinthisprocedureandtheyarenotequivalent.Theresultsfromthetwotestmethods(3.Taberand4.Wyzenbeek)cannotbecompared.”3.1.1Removeaddress3.1.2Add“orequivalent”3.1.3Add“orequivalent”3.1.5Add“orequivalent”3.2Changesampletospecimen3.3Addnew“m”400cyclesshallberunforsnaggingunlessotherwisespecified.Add“type”afterS-11,H-18andCS-10.3.3Change“m”to“n”andadd“unlessotherwisespecified”4.1.1Removeaddress4.1.2Removeaddress,add“orequivalent”4.1.3Add“orequivalent”Application:Change“TheTabermethodoftestis”to“Thesemethodsoftestare”andchange“fabricsand/orvinylcoatedfabrics”to“bodycloth,vinylandleather”RelationshipofSAEStandardtoISOStandard—Notapplicable.Application—Thesemethodsoftestareapplicablefordeterminingtheresistancetosnaggingandabrasionofautomotivebodycloth,vinylandleather.ReferenceSection—Therearenoreferencedpublicationsspecifiedherein.DevelopedbytheSAETextilesandFlexiblePlasticsCommittee