BS EN 14278-2-2004 Textiles - Determination of cotton fibre stickiness - Method using an automatic thermodetection plate device《纺织品 棉纤维粘性的测定 使用自动测温板式装置的方法》.pdf

1、BRITISH STANDARD BS EN 14278-2:2004 Textiles Determination of cotton fibre stickiness Part 2: Method using an automatic thermodetection plate device The European Standard EN 14278-2:2004 has the status of a British Standard ICS 59.060.10 BS EN 14278-2:2004 This British Standard was published under t

2、he authority of the Standards Policy and Strategy Committee on 1 April 2004 BSI 1 April 2004 ISBN 0 580 43598 9 National foreword This British Standard is the official English language version of EN 14278-2:2004. The UK participation in its preparation was entrusted to Technical Committee TCI/24, Te

3、xtiles physical testing, 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 Standards which implement international or European publications referred to in this document may be found in the

4、BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible fo

5、r its 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 responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK int

6、erests 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 title page, pages 2 to 10, an inside back cover and a back cover. The BSI copyright notice displayed in this d

7、ocument indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM EN142782 March2004 ICS59.060.10 Englishversion TextilesDeterminationofcottonfibrestickinessPart2: Methodusinganautomaticthermodetectionplatede

8、vice TextilesDterminationducollagedesfibresdecoton Partie2:Mthodeutilisantundispositifautomatique plateaudethermodtection TextilienBewertungderKlebrigkeitvonBaumwolleTeil 2:Verfahrenmitdemautomatischen Thermodetektionsplattengert ThisEuropeanStandardwasapprovedbyCENon24December2003. CENmembersarebou

9、ndtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheCentralSecretariatortoanyCENmember. ThisE

10、uropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheCentralSecretariathasthesamestatusast heofficial versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,Cyp

11、rus,CzechRepublic,Denmark,Estonia,Finland,France, Germany,Greece,Hungary,Iceland,Ireland,Italy,Latvia,Lithuania,Luxembourg,Malta,Netherlands,Norway,Poland,Portugal, Slovakia, Slovenia,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHE

12、SKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2004CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.EN142782:2004:EEN142782:2004(E) 2 Contents page Foreword. 3 Introduction 4 1 Scope . 5 2 Normativereferences . 5 3 Termsanddefinitions

13、. 5 4 Principle. 5 5 Apparatus 6 6 Atmosphereforconditioningandtesting . . 7 7 Preparationoftestspecimens. 7 8 Procedure 8 9 Calculationandexpressionofresults. . 8 10 Testreport . 9 AnnexA (informative) Statisticalinformation . 10EN142782:2004(E) 3 Foreword Thisdocument(EN142782:2004)hasbeenprepared

14、byTechnicalCommitteeCEN/TC248“Textilesand textileproducts”,thesecretariatofwhichisheldbyBSI. ThisEuropeanStandardshallbegiventhestatusofanationalstandard,eitherbypublicationofanidentical textorbyendorsement,atthelatestbySeptember2004,andconflictingnationalstandardsshallbe withdrawnatthelatestbySepte

15、mber2004. AnnexAisinformative. AccordingtotheCEN/CENELECInternalRegulations,thenationalstandardsorganizationsofthefollowing countriesareboundtoAustria,Belgium,Cyprus,CzechRepublic,Denmark,Estonia,Finland,France, Germany,Greece,Hungary,Iceland,Ireland,Italy,Latvia,Lithuania,Luxembourg,Malta,Netherlan

16、ds, Norway,Poland,Portugal,Slovakia,Slovenia,Spain,Sweden,SwitzerlandandUnitedKingdom.EN142782:2004(E) 4 Introduction Theaimofthismethodistoprovideanindicationofthestickinesspotentialofasampleofcottonfibresby simulatingthetendencyof“contaminated“cottontosticktoworkingsurfaceduringthespinningprocess.

17、This testmethoddoesnotdistinguishbetweenthevarioustypesofcontaminationwhichmaycausestickiness. Resultsofthismethodarenotdirectlyrelatedtothedeterminationofsugarcontent. Thisstandardconsistsofthefollowingmethods,underthegeneraltitle“TextilesDeterminationofcotton fibrestickiness“: Part1:Methodusingama

18、nualthermodetectiondevice Part2:Methodusinganautomaticthermodetectionplatedevice Part3:MethodusinganautomaticthermodetectionrotatingdrumdeviceEN142782:2004(E) 5 1Scope Thisstandarddescribesanautomatictechniquetosimulatethetendencyof“contaminated“cottonfibresto sticktoworkingsurfacesoftextilemachines

19、(e.g.cardclothing,draftingrollers,crushrolls). Testspecimenscanberawcottonfibre(fibresampled,e.g.fromabale),oropenedfibre,slivers,etc. 2 Normativereferences ThisEuropeanStandardincorporatesbydatedorundatedreference,provisionsfromotherpublications. Thesenormativereferencesarecitedattheappropriateplac

20、esinthetext,andthepublicationsarelisted hereafter.Fordatedreferences,subsequentamendmentstoorrevisionsofanyofthesepublicationsapplyto thisEuropeanStandardonlywhenincorporatedinitbyamendmentorrevision.Forundatedreferencesthe latesteditionofthepublicationreferredtoapplies(includingamendments). EN20139

21、 TextilesStandardatmospheresforconditioningandtesting (ISO139:1973). 3 Termsanddefinitions ForthepurposesofthisEuropeanStandard,thefollowingtermsanddefinitionsapply. 3.1 stickinesslevel numberofstickypointsindicatingtheseverityofcottonfibrestickiness 3.2 stickypoints entanglementofoneormorefibrestha

22、tbecomeattachedtoaworkingsurfaceasaresultofcontaminationof thecottonbystickysubstance 3.3 thermodetection actionofrevealingstickypointsthroughthecombinedapplicationofheatandpressure 3.4 pad thickhomogeneousweboffibresformedbyaspecialfibreopeningandcondensingdevice 3.5 remover deviceforremovingthenon

23、stickingfibresfromthealuminiumfoil 4Principle Aweighedfibresampleisprocessedthroughanopenertoobtainapad.Thispadisplacedonanaluminium foilandsubjectedtopressurebytwoseparatepressureplates,oneaftertheother.Thefirstpressureplateis maintainedatatemperaturesignificantlyhigherthanambient.Thesecondpressure

24、plateismaintainedat ambienttemperature.Thepadisremovedfromthefoilandallloosefibresarecleanedaway.Anyfibre entanglementsleftstickingtothefoilarenotedandcountedasstickypoints.Alltheoperationsandresult analysisarecomputercontrolled.EN142782:2004(E) 6 5Apparatus 5.1Automaticsystem Theautomaticsystemcomp

25、risesfivedevicesstationedalongaconveyorbeltandthemeansforunrollinga rollofaluminiumfoilontotheconveyor.Testspecimensaretransported,onthealuminiumfoil,bythe conveyortoeachofthefivestationsinturninlessthan5s. Thesequenceofthe5devicesintheautomaticsystemisasfollows. 5.1.1 Padpreparationdevice Thedevice

26、comprises: arotatingopenerrollercoveredwithmetalliccardclothingsuitableforprocessingalltypesofcotton(saw orrollerginning)intoahomogenousfibrepad.Thetype,dimensionsanddensityofthecardclothingare selectedsoastoberesistanttopreventcontaminationbystickingfibresfromconsecutivetestspecimens. anairstreaman

27、dachambertocollecttheopenedfibresandformapadwithasurfaceareaof(22230) cm 2 . ameanstodeliverthepadontothealuminiumfoil. 5.1.2 Highertemperaturepressuredevice Thedevicecomprisesaheatedpressureplatewhichcanbemovedverticallysoastoapplyaspecified pressureforaspecifiedtimeonapadpositionedbelowit. Devicei

28、ssetsoastoapplyaforceof(1700150)Ntothepadfor(252)s.Theundersideofthepressure plate,whichcomesintocontactwiththepad,hasanareaof(192 1)cmandisprovidedwithanon adhesivesurface. NOTE Thesurfaceoftheplateshouldremaincleanwithoutadheringfibresafterapplyingandremovingthepressure. Someadheringfibresonthissu

29、rfacewillnotinfluencethetestresults. Theheatedsurface,incontactwiththepad,ismaintainedatatemperatureof(53 2)C. 5.1.3 Ambienttemperaturepressureplatedevice Thedevicecomprisesapressureplatewhichcanbemovedverticallysoastoapplyaspecifiedpressurefora specifiedtimeonapadpositionedbelowit. Thedeviceissetso

30、astoapplyaforceof(1700150)Ntothepadfor(252)sinordertofixthesticky pointstothealuminiumfoil.Theundersideofthepressureplate,whichcomesintocontactwiththepad,has anareaof(192 1)cmandisprovidedwitha“nonadhesive“surface. NOTE Thesurfaceoftheplateshouldremaincleanwithoutadheringfibresafterapplyingandremovi

31、ngthepressure. Someadheringfibresonthissurfacewillnotinfluencethetestresults. 5.1.4 Padremovaldevice Theremovaldeviceprovidesameansforremovingthepadfromthefoilandcleaningawayallloosefibres. Thepadisremovedbysuction.Anyremainingloosefibresarecleanedfromthealuminiumfoilbyarotating cylindercoveredwitha

32、suitabletypeofcleaningfabric.Thecleaningfabriciscleanedbysuction.EN142782:2004(E) 7 NOTE Alooppilecarpetmadewithpolyamideloops,massofpileperunitareaabovethesubstrateof360g/mand loopheightof2,3mmhasbeenfoundsuitableascleaningfabric.Thesuppliersrecommendationforthefrequencyof renewalofthecleaningfabri

33、cshouldbefollowed. 5.1.5 Imageanalysisdevice Theimageanalysisdevicecomprises: Lightsourcessufficienttoassureevenilluminationofthefieldofview,soastomaintainauniformgrey scaleleveloverthefulldetectionareaofthecamera. VideocamerahavingaCCDsensor(forcameraresolutionandsensitivity,seethenotebelow),toprov

34、ide animageofanystickypointswithintheareaofmeasurementof(192 1)cm. NOTE1 Atthemomentoftheredactionofthepresentmethod,avideocamera,witharesolutionof581(V)x756(H) andasensitivityofatleast3lux,issuitable.Camerawithimprovedresolutionandsensitivitycouldbeused. Linearpolarisationfilters,toblockthatportion

35、ofthelightwhichemanatesfromthelightsourcesandis reflecteddirectlyfromtheflatsurfaceofthefoilinordertoassurethedetectionofthelightreflectedfrom thestickypoints. NOTE2 Computerprovidedwithanappropriatevideocardandimageanalysissoftwaretocaptureandanalysethe cameraimageintermsofthenumberandsizesofsticky

36、points. Meansforshieldingthefieldofviewandthecameraassemblyfromtheinfluenceofexternallightsources. NOTE3 Aseachstationworksindependently,itisnotnecessarytowaituntilonespecimenisfullyprocessedbefore thenextisinserted.Therefore,uptofourspecimensmaybebeingprocessedatthesametime,whichmeansthataresult is

37、obtainedalmostevery30s. 5.2Balance Balanceabletoweighbetween2gand5gwithanaccuracyofatleast0,1g. 5.3Aluminiumfoil between27g/m 2 and81g/mhavingatleastonebrightsurface,exhibitingnotracesofoxidationandofa widthbetween200mmand300mm. 6 Atmosphereforconditioningandtesting Theatmosphereforconditioningandte

38、stingasdefinedinEN20139shallbeused. 7 Preparationoftestspecimens Conditionthecottonfibresample(laboratorysample)foratleast24hinstandardconditions. NOTE Ifthecottonfibresamplehasahighmoisturecontent,samplepredryingcouldberequired,becausethe equilibriuminmoisturehastobereachedfromthedriedstate. Prepar

39、ethreetestspecimenspickingfibretuftsrandomlyfromthelaboratorysample. Weigheachfibretestspecimentobebetween3,0gand3,5g.EN142782:2004(E) 8 8Procedure 8.1Automaticdevicesetup Followtherecommendationsofthesupplier:cleaning,stabilisationoftheinstrument,calibration,useofthe software. 8.2Operatetheequipmen

40、t Placethealuminiumfoilontotheconveyorbeltwiththebrightfaceupwards,takingcarenottointroduce wrinkles. Introduceafibretestspecimenintothefeedingzoneoftheopenerandrunthetest. Theautomaticdeviceprocessesthetestspecimenasfollows: a) preparationofthepad,withthedevicedescribedin5.1.1 b) applicationofheata

41、ndpressuretothepad,withthedevicedescribedin5.1.2 c) applicationofpressureatambienttemperaturetothepad,withthedevicedescribedin5.1.3 d) removalofthepad,andanyloosefibresfromthealuminiumfoil,withthedevicedescribedin5.1.4 e) counting,measuringandreportingthestickypoints,withthedevicedescribedin5.1.5 An

42、imageofthestickypoints(ifany)isregisteredbythevideocameraasitscansthealuminiumfoilsurface. Theimageisthencapturedbythecomputerandthesoftwareisusedtodetect,measureandcountthe numberofstickypointscontainedintheimage.Thesoftwarecanproduceanhistogramoffrequencyofsticky pointsasafunctionoftheirsize. Repeattheprocedurewiththetwoothertestspecimens. 9 Calculationandexpressionofresults Expressthetotalnumberofstickypointsbycalculatingthearithmeticmeanoftheresultsofthethreetest specimens. NOTE Thestickypointscanbeclassifiedinthreesizecategories:small,mediumandlarge.E