1、BRITISH STANDARD AEROSPACE SERIES BS EN 2667-6:2001 Non-metallic materials Foaming structural adhesives Test methods Part 6: Determination of water absorption The European Standard EN 2667-6:2001 has the status of a British Standard ICS 49.025.50 BS EN 2667-6:2001 This British Standard, having been
2、prepared under the direction of the Engineering Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strategy Committee on 26 July 2002 BSI 26 July 2002 ISBN 0 580 40094 8 National foreword This British Standard is the official English language version
3、of EN 2667-6:2001. The UK participation in its preparation was entrusted to Technical Committee ACE/63, Aerospace structural adhesives, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Sta
4、ndards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Stand
5、ard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the res
6、ponsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN t
7、itle page, pages 2 to 6, an inside back cover and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM EN26676 December2001 ICS49.025.50 En
8、glishversion AerospaceseriesNonmetallicmaterialsFoamingstructural adhesivesTestmethodsPart6:Determinationofwater absorption SriearospatialeMatriauxnonmtalliquesAdhsifs structurauxexpansiblesMthodesdessaiPartie6: Dterminationdelabsorptiondeau LuftundRaumfahrtNichtmetallischeWerkstoffe StrukturelleExp
9、ansionsklebstoffePrfverfahrenTeil6: BestimmungderWasseraufnahme ThisEuropeanStandardwasapprovedbyCENon2May2001. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbi
10、bliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheManagementCentreortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifi
11、edtotheManagementCentrehasthesamestatusasthe official versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece, Iceland,Ireland,Italy,Luxembourg,Netherlands,Norway,Portugal,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTA
12、NDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2001CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.EN26676:2001EEN26676:2001(E) 2 Foreword ThisEuropeanStandardhasbeenpreparedbytheEur
13、opeanAssociationofAerospaceManufacturers (AECMA). AfterinquiriesandvotescarriedoutinaccordancewiththerulesofthisAssociation,thisStandardhas receivedtheapprovaloftheNationalAssociationsandtheOfficialServicesofthemembercountriesof AECMA,priortoitspresentationtoCEN. ThisEuropeanStandardshallbegiventhes
14、tatusofanationalstandard,eitherbypublicationofanidentical textorbyendorsement,atthelatestbyJune2002,andconflictingnationalstandardsshallbewithdrawnat thelatestbyJune2002. AccordingtotheCEN/CENELECInternalRegulations,thenationalstandardsorganizationsofthefollowing countriesareboundtoimplementthisEuro
15、peanStandard:Austria,Belgium,CzechRepublic,Denmark, Finland,France,Germany,Greece,Iceland,Ireland,Italy,Luxembourg,Netherlands,Norway,Portugal, Spain,Sweden,SwitzerlandandtheUnitedKingdom.EN26676:2001(E) 3 1 Scope Thisstandardspecifiesthetestmethodsfordeterminingthewaterabsorptionoffoamingstructural
16、adhesives whenexposedtohighhumidityorimmersedinwater. 2 Normativereferences ThisEuropeanStandardincorporatesbydatedorundatedreferenceprovisionsfromotherpublications. Thesenormativereferencesarecitedattheappropriateplacesinthetextandthepublicationsarelisted hereafter.Fordatedreferences,subsequentamen
17、dmentstoorrevisionsofanyofthesepublicationsapplyto thisEuropeanStandardonlywhenincorporatedinitbyamendmentorrevision.Forundatedreferencesthe latesteditionofthepublicationreferredtoapplies. EN 26673 AerospaceseriesNonmetallicmaterialsFoamingstructuraladhesivefilmsTest methodsPart3:Expansionratioandvo
18、latilecontent 1) 3 Principle Weighingoftestpiecesbeforeandafterexposuretoaspecifiedenvironment. 4 Apparatusandreagents Balanceaccurateto 1mg Oven,capableofmaintainingatemperatureof(110 3)Candof(50 3)C. Humiditycabinet,capableofmaintainingauniformtemperatureof(50 3)Candarelativehumidity of95%to100%.
19、Containerwithdistilledwater Containerwithabsolutealcohol Desiccator Ancillaryitems,suchasknives,metaltemplates,polyesterorpolyvinylfluoricfilm,metalsupport material,measuringdevices,sandpaper. 1) PublishedasAECMAPrestandardatthedateofpublicationofthisstandard.EN26676:2001(E) 4 5 Testpieces 5.1 Theys
20、hallbecutfromcuredandexpandedtestsamples(seefigure1).Theedgesshallbe smoothandfreefromcracks.Ifnecessary,finishingshallbecarriedoutusingsandpaperoremeryclothor byroutering. Figure1Testpiece 5.2 Thethicknessistheaverageoffourcornermeasurements.Alldimensionsshallbemeasured to 0,2mm. 5.3 Iftestpiecesto
21、EN26673areusedforthedeterminationofwaterabsorption,thenareleasefilm shallbeusedbetweenthefoamingstructuraladhesivefilmandthesupportmaterial. 5.4 Thenumberoftestpiecesforeachtestmethodshallbethree. 5.5 Weighthetestpiecesindividually(mass M 1i inmilligrammes=originalmass). 6 Conditioning Thetestpieces
22、shallbeconditionedfor24hintheovenatatemperatureof(110 3)C,cooledinthe desiccatorandimmediatelyweighed(mass M 2i inmilligrammes=massafterconditioning).EN26676:2001(E) 5 7 Testmethods 7.1 14daysimmersion Completelyimmersethetestpiecesinthecontainerwithdistilledwatermaintainedatatemperatureof (25 3)C.A
23、ttheendofthe14days,removethetestpiecesfromthewater,diptheminabsolutealcohol, drythemfor1mininthepreheatedovenatatemperatureof(50 3)C,cooltheminthedesiccatorand immediatelyweigh(mass M 3i inmilligrammes=wetmass). 7.2 14dayshumidity Exposethetestpiecesinthehumiditycabinetfor14daystoairat(50 3)Candrela
24、tivehumidityof95%to 100%.Attheendofthe14days,removethetestpiecesfromthecabinet,cooltheminthedesiccatorand immediatelyweigh(mass M 3i inmilligrammes=wetmass). 7.3 Reconditioning After7.1or7.2,reconditionthetestpiecesto6andimmediatelyweigh(mass M 4i inmilligrammes=mass afterreconditioning). If M 4i is
25、lowerthan M 2i ,thedifferenceshallbeconsideredaswatersolublematterlostduringthetest.Inthis casethewaterabsorptionvalueisthesumofthemassincreaseduringthetestandthemassofthewater solublematter(see8.4and8.5). If M 4i isnotlowerthan M 2i ,theadhesiveisconsideredashavingnowatersolublematter. 8 Expression
26、ofresults 8.1 Themasslossduetoconditioning,expressedinpercentage,shallbecalculatedasfollows: massloss 100 = 1i 2i 1i M M M 8.2 Themassincreaseduetowaterabsorptionduringthetest,expressedinpercentage,shallbe calculatedasfollows: massincrease 100 = 2i 2i 3i M M M Theactualmassincreaseduringthetest,expr
27、essedinmilligrammesofwaterpercubiccentimeteroftest piece,shallbecalculatedasfollows: actualmassincrease 1i 2i 3i = V M M where: V 1i istheoriginalvolumeofthetestpieceincubiccentimeters,seefigure1and5.2.EN26676:2001(E) 6 8.3 Thesolublematterlostduringthetest(see7.3),expressedinpercentage,shallbecalcu
28、latedas follows: solublematterlost 100 = 2i 4i 2i M M M Theactualmassofsolublematterlostduringthetest(see7.3),expressedinmilligrammesofwaterpercubic centimeteroftestpiece,shallbecalculatedasfollows: solublematterlost 1i 4i 2i = V M M 8.4 Thepercentageofwaterabsorptionduringthetestisthesumofthevalues
29、of8.2and8.3. 8.5 Theactualmassofwaterabsorbedduringthetestisthesumofthevaluesof8.2and8.3. 9 Testreport Itshallincludethefollowing: numberofthisstandard; completeidentificationofthefoamingadhesivematerialincludingthetype,manufacturer,dateof manufacture,batchnumber,materialstandardnumber,mixingprocedu
30、reoffoamingpasteadhesive, storageconditions,expansionratetoEN26673; curingconditionsincludingtheheatuprate,curingtimeandtemperature; dimensionsofthetestpiecesbeforeconditioning; test conditions; individualandmeanvalues(see8.1,8.2,8.3,8.4and8.5); anyobservationsconcerningthetestpiecessuchascrackingor
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