1、BRITISH STANDARD BS EN 12759:2001 Rubber- or plastic- coated fabrics Determination of resistance to liquids The European Standard EN 12759:2001 has the status of a British Standard ICS 59.080.40 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBS EN 12759:2001 This British Stand
2、ard, having been prepared under the direction of the Sector Policy and Strategy Committee for Materials and Chemicals, was published under the authority of the Standards Policy and Strategy Committee on 26 September 2001 BSI 26 September 2001 ISBN 0 580 38044 0 National foreword This British Standar
3、d is the official English language version of EN 12759:2001. The UK participation in its preparation was entrusted to Technical Committee TCI/78, Coated fabrics, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-
4、references The British Standards 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
5、Catalogue. A British Standard 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 th
6、e text; present to the responsible 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 in
7、side front cover, the EN title page, pages 2 to 14, 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 EN12759 A
8、ugust2001 ICS59.080.40 Englishversion RubberorplasticcoatedfabricsDeterminationofresistance toliquids Supportstextilesrevtusdecaoutchoucoudeplastique Dterminationdelarsistanceauxliquides MitKautschukoderKunststoffbeschichteteTextilien BestimmungderFlssigkeitsbestndigkeit ThisEuropeanStandardwasappro
9、vedbyCENon23June2001. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheMan
10、agementCentreortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheManagementCentrehasthesamestatusasthe official versions. CENmembersarethenationalst
11、andardsbodiesofAustria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece, Iceland,Ireland,Italy,Luxembourg,Netherlands,Norway,Portugal,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:rued
12、eStassart,36B1050Brussels 2001CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.EN12759:2001EEN12759:2001(E) 2 Foreword ThisEuropeanStandardhasbeenpreparedbyTechnicalCommitteeCEN/TC248“Textiles andtextileproducts“,thesecretariatofwhichisheldbyBSI. ThisE
13、uropeanStandardshallbegiventhestatusofanationalstandard,eitherbypublication ofanidenticaltextorbyendorsement,atthelatestbyFebruary2002,andconflictingnational standardsshallbewithdrawnatthelatestbyFebruary2002. EN12759containstwoinformativeannexes:annexA,whichgivesexamplesoftestliquids, andannexBwhic
14、hsuggestsarangeofpossibletesttemperatures. ThisstandardincludesaBibliography. AccordingtotheCEN/CENELECInternalRegulations,thenationalstandardsorganizations ofthefollowingcountriesareboundtoimplementthisEuropeanStandard:Austria,Belgium, CzechRepublic,Denmark,Finland,France,Germany,Greece,Iceland,Ire
15、land,Italy, Luxembourg,Netherlands,Norway,Portugal,Spain,Sweden,SwitzerlandandtheUnited Kingdom.EN12759:2001(E) 3 1Scope ThisEuropeanStandarddescribestwomethodsofevaluatingtheresistanceoffabricscoated withplasticsorwithvulcanisedrubbertotheactionofliquidsbymeasurementofselected propertiesofthemateri
16、alsbeforeandafterimmersioninselectedliquids. ThemethodsdescribedinthisEuropeanStandardconcernthefollowingdeterminations: a)Method1:Changeofphysicalpropertiesafterimmersionintestliquids b)Method2:Changeofphysicalpropertiesafterexposureandevaporationofvolatile testliquids. 2Normativereferences ThisEur
17、opeanStandardincorporatesbydatedorundatedreference,provisionsfromother publications.Thesenormativereferencesarecitedattheappropriateplacesinthetextandthe publicationsarelistedhereafter.Fordatedreferences,subsequentamendmentstoorrevisions ofanyofthesepublicationsapplytothisEuropeanStandardonlywheninc
18、orporatedinitby amendmentorrevision.Forundatedreferencesthelatesteditionofthepublicationreferredto applies(includingamendments). ENISO2231RubberorplasticscoatedfabricsStandardatmospheresforconditioningand testing(ISO2231:1989) ENISO22861RubberorplasticscoatedfabricsDeterminationofrollcharacteristics
19、 Part1:Methodsfordeterminationoflength,widthandnetmass(ISO22861:1998) 3Principle ThisEuropeanStandardprovidesaprocedureforexposingtestspecimenstotheinfluenceof liquidsunderdefinedconditionsoftemperatureandtime.Selectedpropertiesaredetermined accordingtotherelevantEuropeanorInternationalStandards.Tes
20、tspecimensarethen immersedinselectedliquid(s)andthepropertiesdeterminedagain.Thepercentagechangeor thevaluesbeforeandafterimmersionaremeasuresoftheresistanceofthematerialtothe selectedliquid(s). 4Testliquidsformethods1and2 Ascommercialliquidsmaynothaveanentirelyconstantcomposition,astandardimmersion
21、 liquidconsistingofwelldefinedchemicalcompoundsormixtureofcompoundsshallbeused. SomesuitableliquidsarerecommendedinannexA(informative). Whenacommercialliquidisused,thetestreportshallmentionalltheavailableinformation aboutitsorigin,composition,properties,e.g.viscosity,anilinepoint,etc.,andbatchnumber
22、.EN12759:2001(E) 4 NOTEFortestpurpose,itisusuallydesirabletousetheliquid(s)withwhichthecoated fabricwillcomeintocontactduringuse.Whentestingtodeterminetheeffectofchemical solutions,theconcentrationofthesolutionsshouldbeappropriatetotheproposedapplication. WARNINGAppropriatesafetyprecautionsshouldbet
23、akenwhenpreparingandhandlingtest liquids,especiallythoseknowntobetoxic,corrosiveorflammable.Productsgivingofffumes shouldbehandledonlyunderanefficientlyventilatedhood,corrosiveproductsshouldnotbe allowedtocomeintocontactwiththeskinorordinaryclothing,andflammableproducts shouldbekeptawayfromanysource
24、ofignition. Inaddition,attentionisdrawntothepossibledamagingoftestequipment(e.g.clampsor jaws)whenusingcorrosivetestliquids. 5Testconditionsformethods1and2 5.1Temperature Useatesttemperatureapproximatingthosefoundduringuse.Maintainthetest temperature( T)at T 2C. Unlessotherwisespecifiedoragreedupon,
25、testtemperature( T)shouldbeoneofthestandard temperaturesgiveninannexB. 5.2Immersionperiod Thefollowingimmersionperiodsarerecommended: 22h 0,25h;46h 0,25h;72h 2h;168h 2h;multiplesof7days 2h. NOTEWhentestingforchangesinphysicalproperties,itisadvisabletousesuchaperiodof immersionthatequilibriumisallowe
26、dtobereached.Todefinethisequilibrium,itis recommendedtocarryoutpreliminarymeasurementswithseveralperiodsofimmersion, recordingtheresultsasafunctionoftime.Wheneverpracticable,thetotalimmersionperiod shouldbechosentoextendfarbeyondthepointofmaximumvariation. 5.3Light Immersiontestsshallbeconductedinth
27、eabsenceofdirectlight. 5.4Timelapsebetweenmanufacturingandtesting Theminimumtimelapsebetweenmanufacturingandtestingshallbe16h.EN12759:2001(E) 5 6Conditioningatmosphereformethods1and2 Testspecimensshallbeconditionedbeforeimmersioninoneoftheatmospheresin accordancewithENISO2231,unlessotherwisespecifie
28、dinthestandardrelevanttothe propertytobetested. 7Apparatusformethods1and2 Theapparatustobeusedisdeterminedbythetemperatureofimmersion,thevolatilityofthe testliquidandthenumberanddimensionsofthetestspecimensrequiredfortestingthe selectedproperty.Attemperaturesappreciablybelowtheboilingpointofthetestl
29、iquid,usea stopperedvessele.gglassbottle,tube,ofsuchdimensionsthatthetestspecimensremain completelyimmersedinthespecifiedvolumeoftestliquidandarefreelyexposedonall surfaceswithoutrestraint.Attemperaturesneartheboilingpointofthetestliquid,fitthe vesselwitharefluxcondenserorothersuitablemeansofminimis
30、ingevaporationofthetest liquid,insteadofthestopper. 8Method1Changeofphysicalpropertiesafterimmersionintestliquid. 8.1Preparationoftestspecimens Selectpropertiesthatareconsideredrelevanttotheenduse(forexample:tensilestrength, coatingadhesion,mass perunitarea,tearresistance,lowtemperatureproperties,et
31、c.). Cutintheusablewidthoftheroll(accordingtoENISO22861)twosetsoftestspecimens foreachpropertyasspecifiedintherelevantENorISOstandard. Conditionallthetestspecimensaccordingtoclause6. 8.2Determinationoforiginalpropertiesbeforeimmersion Determinetheselectedpropertiesonthefirstsetoftestspecimensusingth
32、erespectiveENor ISOstandards(seeclause2). 8.3Immediatepropertiesafterimmersion 8.3.1Immersion Placethetestspecimens,suitablyseparated,inavesselasdescribedinclause7,witha volumeoftestliquid(clause4)thatshallbeatleast15timesthecombinedvolumeofthetest specimensandsufficienttokeepthemtotallyimmersed.Ift
33、heconditionsoftestdonot necessitatetheuseofarefluxcondenser,stopperthevessel.Maintainthetestliquidatthe testtemperature( T)duringalltheexposureperiod,withinatoleranceof 2C.EN12759:2001(E) 6 8.3.2Preparationbeforetesting Attheendoftheimmersionperiod,bringthetestspecimens,ifnecessary,tothestandard tes
34、tingtemperature,preferablybyquicklytransferringthemtoafreshportionoftestliquidat thistemperatureforaperiodof5minto10min. Removethesurplustestliquidfromthesurfaceofthetestspecimens.Themethodof removingthesurplusliquidmayvarywiththenatureoftheliquid.Whenvolatile,mobile liquidslikeisooctaneandtoluenear
35、eused,removequicklyandwipethetestspecimenwith filterpaperorapieceoftextilewhichdoesnotdepositlint.Somedifficultymaybe experiencedincompletelyremovingviscous,nonvolatileliquidsbythismethodanditmay benecessarytodipthetestspecimenquicklyinasuitablevolatileliquidsuchasmethanoland againwipethetestspecime
36、nwithfilterpaperorapieceoftextilewhichdoesnotdepositlint. Visuallyassesstheappearanceofthetestspecimensagainstapieceofnotimmersedmaterial. Notewhetheranychangeoccurredornotanddescribetheeventualchangesobserved. 8.3.3Testing Testimmediatelyafterremovalofthesurplusliquid.Measuretheselectedphysicalprop
37、erty inaccordancewiththeappropriatestandard. 8.4Expressionofresults Expressthevaluesbeforeandafterimmersionorthechangeinpropertiesasapercentageof thevaluefortheoriginalpropertybeforeimmersion. 9Method2Changeofphysicalpropertiesafterimmersionandevaporationofvolatile testliquids 9.1Preparationoftestsp
38、ecimens Preparethetestspecimensaccordingto8.1. 9.2Determinationoforiginalpropertiesbeforeimmersion Determinetheoriginalpropertiesaccordingto8.2 9.3Propertiesafterevaporationofvolatiletestliquid 9.3.1Immersion Cutandimmersethetestspecimensinaccordancewith8.3.1. 9.3.2Evaporationofthevolatileliquid Att
39、heendofthespecifiedimmersionperiod,removethetestspecimensandhangthemina circulatingairovenatatemperatureof70C 2Cforaperiodof2h0,1h.AttheendofEN12759:2001(E) 7 thedryingperiod,removethetestspecimensfromtheovenandallowthemtocoolatroom temperature. 9.3.3Testing Thetimeintervalbetweenremovalfromtheovena
40、ndtestingshallbenotlessthan1hand notmorethan2h.Measuretheselectedphysicalpropertyinaccordancewiththeappropriate standard. 9.4Expressionofresults Expressthevaluesbeforeandafterimmersionorthechangeinpropertiesasapercentageof thevaluefortheoriginalpropertybeforeimmersion. 10Testreport Thetestreportshal
41、lincludethefollowingparticulars: a)areferencetothisEuropeanStandard; b)thedateoftest; c)theconditioningandtestingatmosphere; d)identificationofthecoatedfabric; e)descriptionofthetestliquid(seeclause4); f)themethodused(method1ormethod2); g)theimmersiontemperature; h)theimmersionperiod; i)appearanceof
42、thetestspecimensafterimmersion; j)thevalueofthemeasuredpropertiesbeforeandafterimmersion,ortheir percentagechange; k)anydeviationfromthegivenprocedure.EN12759:2001(E) 8 AnnexA (informative) Testliquids A.1Standardsimulatedfuels TheliquidslistedinTableA.1shouldbeusedasstandardfuelsfortheclassificatio
43、nof vulcanisedrubberorforqualitycontrolinrespectofthebehaviourofrubbersorplasticsin hydrocarbonbasedliquids,forexamplepetroleumderivedfuels. LiquidsB,C,andDwillaffordareasonablesimulationoftheeffectonrubbersandplasticsof themajorityofmotorgasolinescurrentlyavailable.Thelattervarywidelyincomposition, evenwithinthesamegrade(i.e.knockrating)andwithinthesamelocation,andtheuseofall threeliquidsisnecessarytocoverthisrangeofcomposition. LiquidFisintendedtosimulatedieself
