1、ENISO3379November2024EuropeanstandardNormeeuropeenneEuropaischenormICS59.140.30SupersedesENISO3379:2015EnglishVersionLeather-DeterminationofdistensionandstrengthofsurfaceBallburstmethodISO3379:2024Cuir-Determinationdeextensionetdelaresistancealatractiondelasurface(methodedelabille)(ISO3379:2024)Lede
2、r-BestimmungderNarbendehnfahigkeitund-bruchkraft(Lastometer-Methode)(ISO3379:2024)ThisEuropeanStandardwasapprovedbyCENon1November2024.CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEuropeanStandardthestatusofanationalstandardwithoutanyalteratio
3、n.Up-to-datelistsandbibliographicalreferencesconcerningsuchnationalstandardsmaybeobtainedonapplicationtotheCEN-CENELECManagementCentreortoanyCENmember.ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).AversioninanyotherlanguagemadebytranslationundertheresponsibilityofaCENmembe
4、rintoitsownlanguageandnotifiedtotheCEN-CENELECManagementCentrehasthesamestatusastheofficialversions.CENmembersarethenationalstandardsbodiesofAustria,Belgium,Bulgaria,Croatia,Cyprus,CzechRepublic,Denmark,Estonia,Finland,France,Germany,Greece,Hungary,Iceland,Ireland,Italy,Latvia,Lithuania,Luxembourg,M
5、alta,Netherlands,Norway,Poland,Portugal,RepublicofNorthMacedonia,Romania,Serbia,Slovakia,Slovenia,Spain,Sweden,Switzerland,TiirkiyeandUnitedKingdom.要EUROPEANCOMMITTEEFORSTANDARDIZATIONCOMITEEUROPEENDENORMALISATIONEuropaischeskomiteefurnormungCEN-CENELECManagementCentre:RuedelaScience23,B-1040Brussel
6、s2024CENAllrightsofexploitationinanyformandbyanymeansreservedRef.No.ENISO3379:2024EworldwideforCENnationalMembers.ContentsPageEuropeanforeword3EuropeanforewordThisdocument(ENISO3379:2024)hasbeenpreparedbyTechnicalCommitteeISO/IULTCSInternationalUnionofLeatherTechnologistsandChemistsSocietiesincollab
7、orationwithTechnicalCommitteeCEN/TC289LeatherthesecretariatofwhichisheldbyUNLThisEuropeanStandardshallbegiventhestatusofanationalstandard,eitherbypublicationofanidenticaltextorbyendorsement,atthelatestbyMay2025,andconflictingnationalstandardsshallbewithdrawnatthelatestbyMay2025.Attentionisdrawntothe
8、possibilitythatsomeoftheelementsofthisdocumentmaybethesubjectofpatentrights.CENshallnotbeheldresponsibleforidentifyinganyorallsuchpatentrights.ThisdocumentsupersedesENISO3379:2015.Anyfeedbackandquestionsonthisdocumentshouldbedirectedtotheusersnationalstandardsbody/nationalcommittee.Acompletelistingo
9、fthesebodiescanbefoundontheCENwebsite.AccordingtotheCEN-CENELECInternalRegulations,thenationalstandardsorganizationsofthefollowingcountriesareboundtoimplementthisEuropeanStandard:Austria,Belgium,Bulgaria,Croatia,Cyprus,CzechRepublic,Denmark,Estonia,Finland,France,Germany,Greece,Hungary,Iceland,Irela
10、nd,Italy,Latvia,Lithuania,Luxembourg,Malta,Netherlands,Norway,Poland,Portugal,RepublicofNorthMacedonia,Romania,Serbia,Slovakia,Slovenia,Spain,Sweden,Switzerland,TiirkiyeandtheUnitedKingdom.EndorsementnoticeThetextofISO3379:2024hasbeenapprovedbyCENasENISO3379:2024withoutanymodification.ContentsPageFo
11、rewordiv1 Scope12 Normativereferences13 Termsanddefinitions14 Principle25 Apparatusandmaterial26 Specimenandtestpiecespreparation37 Procedure38 Testreport4AnnexA(informative)Sourcesofapparatus6ForewordISO(theInternationalOrganizationforStandardization)isaworldwidefederationofnationalstandardsbodies(
12、ISOmemberbodies).TheworkofpreparingInternationalStandardsisnormallycarriedoutthroughISOtechnicalcommittees.Eachmemberbodyinterestedinasubjectforwhichatechnicalcommitteehasbeenestablishedhastherighttoberepresentedonthatcommittee.Internationalorganizations,governmentalandnon-governmentabinliaisonwithI
13、SO,alsotakepartinthework.ISOcollaboratescloselywiththeInternationalElectrotechnicalCommission(IEC)onallmattersofelectrotechnicalstandardization.TheproceduresusedtodevelopthisdocumentandthoseintendedforitsfurthermaintenancearedescribedintheISO/IECDirectives,Part1.Inparticular,thedifferentapprovalcrit
14、erianeededforthedifferenttypesofISOdocumentsshouldbenoted.ThisdocumentwasdraftedinaccordancewiththeeditorialrulesoftheISO/IECDirectives,Part2(seeWWW.iso.org/directives).ISOdrawsattentiontothepossibilitythattheimplementationofthisdocumentmayinvolvetheuseof（八）patent(三).ISOtakesnopositionconcerningthee
15、vidence,validityorapplicabilityofanyclaimedpatentrightsinrespectthereof.Asofthedateofpublicationofthisdocument,ISOhadnotreceivednoticeof（八）patent(三)whichmayberequiredtoimplementthisdocument.However,implementersarecautionedthatthismaynotrepresentthelatestinformation,whichmaybeobtainedfromthepatentdat
16、abaseavailableatwww.iso.org/patents.ISOshallnotbeheldresponsibleforidentifyinganyorallsuchpatentrights.Anytradenameusedinthisdocumentisinformationgivenfortheconvenienceofusersanddoesnotconstituteanendorsement.Foranexplanationofthevoluntarynatureofstandards,themeaningofISOspecifictermsandexpressionsr
17、elatedtoconformityassessment,aswellasinformationaboutISOsadherencetotheWorldTradeOrganization(WTO)principlesintheTechnicalBarrierstoTrade(TBT),Seewwwtso.org/iso/foreword.htmLIULTCS,originallyformedin1897,isaworld-wideorganizationofprofessionalleathersocietiestofurthertheadvancementofleathersciencean
18、dtechnology.IULTCShasthreeCommissions,whichareresponsibleforestablishinginternationalmethodsforthesamplingandtestingofleather.ISOrecognizesIULTCSasaninternationalstandardizingbodyforthepreparationoftestmethodsforleather.ThisdocumentwaspreparedbythePhysicalTestCommissionoftheInternationalUnionofLeath
19、erTechnologistsandChemistsSocieties(IUPCommission,IULTCS)incollaborationwiththeEuropeanCommitteeforStandardization(CEN)TechnicalCommitteeCEN/TC289,Leather,inaccordancewiththeAgreementontechnicalcooperationbetweenISOandCEN(ViennaAgreement).Thisthirdeditioncancelsandreplacesthesecondedition(ISO3379:20
20、15),whichhasbeentechnicallyrevised.Themainchangesareasfollows:一theterminologyandreferencesaremodifiedtobeinlinewithISO2418:2023;一ClaUSe6hasbeenre-arrangedtomakeiteasiertofollow.Anyfeedbackorquestionsonthisdocumentshouldbedirectedtotheusersnationalstandardsbody.Acompletelistingofthesebodiescanbefound
21、atwww.iso.org/membnrs.htmLInternationalStandardLeatherDeterminationofdistensionandstrengthofsurface(ballburstmethod)1ScopeThisdocumentspecifiesatestmethodforthedeterminationofdistensionandstrengthoftheleathergrainorfinishedsurface.Thismethodisapplicabletoallflexibleleathersanditisparticularlysuitabl
22、etodeterminethelastabilityofleathersforfootwearuppers.2 NormativereferencesThefollowingdocumentsarereferredtointhetextinsuchawaythatsomeoralloftheircontentconstitutesrequirementsofthisdocument.Fordatedreferences,onlytheeditioncitedapplies.Forundatedreferences,thelatesteditionofthereferenceddocument(
23、includinganyamendments)applies.ISO2418,LeatherChemical,physical,mechanicalandfastnesstestsPositionandpreparationofspecimensfortestingISO2419,LeatherPhysicalandmechanicaltestsSpecimenandtestpiececonditioningISO2589,LeatherPhysicalandmechanicaltestsDeterminationOfthicknessISO15115,LeatherVocabularyEN1
24、5987,LeatherTerminologyKeydefinitionsfortheleathertrade3 TermsanddefinitionsForthepurposesofthisdocument,thetermsanddefinitionsgiveninISO15115,EN15987andthefollowingapply.ISOandIECmaintainterminologydatabasesforuseinstandardizationatthefollowingaddresses:一ISOOnlinebrowsingplatform:availableathttps:W
25、WW.iso.orgobp一IECElectropedia:availableathttps:WWW.electropedia.org/3.1wearingsurfaceexposedorvisiblefaceoftheleatherwhenusedinitsintendedapplicationNote1toentry:Thewearingsurfaceisusuallythegrainsideofleather,however,thewearingsurfaceofsomeleathersmaybeotherwisedressedorfinished,e.g.patentleather.3
26、2reversesideoppositesidetothewearingsurface(3.1)Note1toentry:Thereversesideisusuallythefleshsideofleather.3.3cracksmallsurfacesplitsortearslessthanapproximately0,5mmISO2024-Allrightsreserved3.4burstcompleteruptureofthefullthicknessofthetestpiece3.5lastabilityabilityofamaterialtobestretchedsimultane
27、ouslyinalldirections(distended)withoutbeingdamaged4 PrincipleAcirculartestpieceisclampedarounditsedgeandisgraduallydistendedbyforcingasteelmetalball,attachedtotheendofaplunger,againstthecentreofthetestpieceonthereverseside.Atcertaindistension,measuredintermsofdistancetravelledbytheplunger,cracksappe
28、aronthewearingsurfaceofthetestpieceoritsustainsotherpermanentphysicaldamage;thisdistensionisrecordedasthecrackingpointorfirstdamage.Atahigherdistension,thematerialusuallyburstsandthisdistensionmayalsoberecorded.5 Apparatusandmaterial5.1 Testmachine,incorporatingthefollowing(seeFigure1).NOTESourceofa
29、pparatusisprovidedinAnneXA.5.1.1 Clamp,forholdingsecurelythetestpiecearounditsedge,leavingacentralcircularapertureofdiameter25,0mm0,5mm.Thedesignoftheclampingsystemofthemachineshallensurethatthetestpiecedoesnotslipduringthetestandshallneitherstretchnorcompressthecentralareaofthetestpieceasitisclampe
30、d.NOTEToensurethatthetestpiecedoesnotslipintheclampduringthetest,itcanbenecessarytoaddsomeinterlockingprofile,serrations,orothermechanicalinterventiontothefaceofthetopandbottomclamps.5.1.2 Moveableplunger,withahemisphericalend,nominaldiameter6,25mm0,05mm.5.1.3 Meansofmovingtheplungerwithoutrotation,
31、againstthecentreofthetestpieceandinadirectionnormaltotheplaneoccupiedbythetestpiecewhenitisclamped,ataspeedof0,20mm/s0,05mms.5.1.4 Meansofmonitoringandrecordingdistensionoftheleather,ortraveloftheplungerfromzero,inadirectionnormaltotheplaneoccupiedbythetestpiecewithanaccuracyof0,05mm.5.1.5 Meansofmo
32、nitoringandrecordingtheforceontheplungerwithanaccuracyof10N.Key1 topclamp2 bottomclamp3 plungerwithhemisphericalendAaperturediameter(25,0mm)Figure1Clampandplunger5.2 Pressknife,asspecifiedinISO2418,capableofcuttingacirculartestpieceinoneoperationwithsuitabledimensions,tobefirmlyclampedinthetestmachi
33、ne.5.3 Thicknessgauge,asspecifiedinISO2589.6 Specimenandtestpiecespreparation6.1 SelectthespecimeninaccordancewithISO2418.6.2 Conditiontheleatherspecimenand/ortestpiecesinaccordancewithISO2419.6.3 Usingthepressknife(5.2),cutatleastthreetestpiecesinaccordancewithISO2418.Wherethereisarequirementformor
34、ethantwohidesorskinstobetestedinonebatch,thenonlyonetestpieceneedstobetakenfromeachhideorskin,providedthattheoveralltotalisnotlessthanthreetestpieces.6.4 MeasurethethicknessofthetestpiecesinaccordancewithISO2589.7 Procedure7.1 Ensurethatthetestmachineissetwiththecentralplungerretractedtozeroorminimu
35、mdistension.Ifithasamaximumforceindicator,setittozero.NOTEZerodistensionissetbyplacingacircular,rigid,andflatmaterialintheapparatusinplaceofthetestpiece.7.2 Clamptheconditionedtestpieceintothetestmachinesothattheball-endedplungeractsonthereversesideofthetestpieceandthetestpieceisflat.ISO3379三2024(en
36、)IULTCSIUP9三2024(en)7.3 Increasethedistensionatarateof0,20mm/s0,05mm/sandwatchthegrainorfinishedsurfacefortheoccurrenceofacrackorfirstdamageonthesurface.7.4 Whenacrackorfirstdamageoccurs,recordthedistensioninmillimetretothenearest0,1mmandtheforceinnewtontothenearest10N.Ifburstisrequired,continuethed
37、istensionwiththeminimumofdelay.Patentleatherisaspecialcasebecause,often,thegrainoftheleathercracksbeforethepatentsurfacefilm.Particularcareisthereforerequiredwhenobservingpatentleathertestpieces.Twoindicationsofthegraincrackingareasmallshallowdepressioninthesurfaceofthefilmabovethecrackandamomentary
38、dropintheforceontheplunger.Ifthepatentfilmcracks,thisshallalsoberegardedasa“graincrackwhetherornotacrackinthegrainisvisible.NOTEForsomeleathers,itispossibletodeterminegrainorfinishcrackingofthewearingsurfacebyanalysingtheforce-displacementcurve.Whencrackingoccurs,thereisasuddendecreaseintheload,tobe
39、consideredonlyasaconfirmationofthevisualassessment.7.5 Ifthetestpiecedoesnotcrackbeforebursting,reportthevaluesofdistensionandloadatburst.Ifthetestpiecedoesnotburstwhenthemaximumforceordistensionisreached,recordthedisplacementandreporttheresultas“morethanmaximumdistension,ormorethanmaximumIOaer(e.g.
40、15mmor800N).NOTEIfthereisapauseduringthedistensionofatestpiece,relaxationofstressesinitoccursandtheforcereadingtendstofall.Therefore,thetestisideallycontinuouswithnodelays,but,ifnecessary,anydelayduringdistensionbetweencrackingandburstislessthan15s.7.6 Retracttheplunger,removethetestspecimen,andinsp
41、ectthemarksleftbytheclampsonthewearingsurfaceofthespecimen.Iftherearesignsofslippagehavingoccurredduringthetest,forexample,evidentbyblurringofclampingringsoroftearingoftheclampededges,rejecttheresultsandrepeattheprocedure7.1to716withanewspecimen.7.7 Repeat7ilto716forothertestpieces.7.8 Calculatethem
42、eandistensionatcrackinmillimetre(mm),themeanforceatcrackinnewton(N).7.9 Calculatethemeanforceatburstinnewton(N)andthemeandistensionatburstinmillimetre(mm).8 TestreportThetestreportshallincludethefollowing:a) referencetothisdocument,i.e.ISO3379:2024;b) fulldetailsforidentificationofthespecimen,includ
43、inganyspecificreferenceifknown,andthethicknessoftheleatherinmillimetre(mm);c) meandistensionatcrackinmillimetre(mm)tothenearest0,1mm;ifthetestpiecedoesnotcrackbeforebursting,reportthevaluesofdistensionatburst(see7.8);d) meanforceatcrackinnewton(N)tothenearest10N;ifthetestpiecedoesnotcrackbeforeburst
44、ing,reportthevaluesofloadatburst(see7.8):e) meandistensionatburstinmillimetre(mm)tothenearest0,1mm,ifrequired(see7.9);f) meanforceatburstinnewton(N)tothenearest10N,ifrequired(see7.9):g) standardatmosphereusedforconditioningandtesting,asgiveninISO2419;h) anydeviationsfromthemethodspecifiedinthisdocum
45、ent;i) thedateofthetest.AnnexA(informative)SourcesofapparatusExamplesofsourcesofsuitableapparatusavailablecommerciallyaregivenbelow.ThisinformationisgivenfortheconvenienceofusersofthisdocumentanddoesnotconstituteanendorsementbyISOorCENoftheseproductsandsuppliers:SATRATechnologyCentre,WyndhamWay,Telf
46、ordWay,Kettering,Northants,NN168SDEngland,WWW一GiulianiApparecchiScientifictviaCentrallo,6818l1-10156Torino,Italy,WWW.giuliani.it一MUVer-FranCiSCoMUfiOZIrleS,AvdaHispanoamOriCa42.E-03610Petrer(Alicante),Spain,一SODEMATVallondeFontanes,ruedesAcaciaslF-30520Saint-Martin-de-Valgalgues,France.WWW.mat-ZIPOR
47、EquipamentoseTecnologiaIndustrial,S.A,-RuadosAqores,278-ZonaIndustrialn-1,3700-018S.JoaodaMadeira,Portugal,一PFLTestandResearchInstitute,Marie-Curie-Strasse19,D-66953Pirmasens,Germany,WWWpfi-germany.de一Hegewald&PeschkeMess-undPriiftechnikGmbHlAmGriindchen1,D-01683NossenlGermany,WWW.hegewald-peschke.de
