1、Licensed Copy: Wang Bin, ISO/Exchange China Standards Information Centre, 10 September 2003, Uncontrolled Copy, (c) BSIBRITISH STANDARD BS EN 13844:2002 Textiles Monofilaments Determination of thermal shrinkage The European Standard EN 13844:2002 has the status of a British Standard ICS 59.060.20 Li
2、censed Copy: Wang Bin, ISO/Exchange China Standards Information Centre, 10 September 2003, Uncontrolled Copy, (c) BSIBS EN 13844:2002 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 15 April 2003 BSI 15 April 2003 ISBN 0 580 41583 X National
3、foreword This British Standard is the official English language version of EN 13844:2002. The UK participation in its preparation was entrusted to Technical Committee TCI/24, Physical testing of textiles, which has the responsibility to: A list of organizations represented on this committee can be o
4、btained 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 BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facili
5、ty 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 for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations.
6、 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 interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages
7、 This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 15 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 Comments Licensed Copy: Wang Bin, ISO/Exc
8、hange China Standards Information Centre, 10 September 2003, Uncontrolled Copy, (c) BSIEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM EN13844 December2002 ICS59.060.20 Englishversion TextilesMonofilamentsDeterminationofthermalshrinkage TextilesMonofilamentsDterminationduretraitla chaleur TextilienMo
9、nofileBestimmungdes Wrmeschrumpfverhaltens ThisEuropeanStandardwasapprovedbyCENon23October2002. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalref
10、erencesconcernings uchnational standardsmaybeobtainedonapplicationtotheManagementCentreortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheManagemen
11、tCentrehasthesamestatusasthe official versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece, Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATI
12、ON COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2002CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.EN13844:2002E Licensed Copy: Wang Bin, ISO/Exchange China Standards Information Centre, 10 Se
13、ptember 2003, Uncontrolled Copy, (c) BSIEN13844:2002(E) 2 Contents page Foreword3 Introduction .4 1 Scope 5 2 Normativereferences 5 3 Termsanddefinitions. .5 4 Determinationofshrinkageinhotairundertension . 6 4.1 Principle6 4.2 Apparatus .6 4.3 Procedure .7 5 Determinationofshrinkageinhotairwithoutt
14、ension . .8 5.1 Principle8 5.2 Apparatus .8 5.3 Procedure .8 5.4 Calculationofresults 9 6 Determinationofshrinkageinhotwaterwithouttension . 9 6.1 Principle9 6.2 Apparatus .10 6.3 Procedure .11 6.4 Calculationofresults 12 7 Testreport . .13 AnnexA (informative) Recommendedconditioningtimeversusdiame
15、ter.14 AnnexB (informative) Anexampleofaprocedureformarkingthelength L O andmeasuringthelength L S underapretension 15 Licensed Copy: Wang Bin, ISO/Exchange China Standards Information Centre, 10 September 2003, Uncontrolled Copy, (c) BSIEN13844:2002(E) 3 Foreword Thisdocument(EN13844:2002)hasbeenpr
16、eparedbyTechnicalCommitteeCEN/TC248,“Textilesandtextile products“thesecretariatofwhichisheldbyBSI. ThisEuropeanStandardshallbegiventhestatusofanationalstandard,eitherbypublicationofanidenticaltextor byendorsement,atthelatestbyJune2003,andconflictingnationalstandardsshallbewithdrawnatthelatestby June
17、2003. InthisEuropeanStandardtheAnnexesAandBareinformative. AccordingtotheCEN/CENELECInternalRegulations,thenationalstandardsorganizationsofthefollowing countriesareboundtoimplementthisEuropeanStandard:Austria,Belgium,CzechRepublic,Denmark,Finland, France,Germany,Greece,Iceland,Ireland,Italy,Luxembou
18、rg,Malta,Netherlands,Norway,Portugal,Spain, Sweden,SwitzerlandandtheUnitedKingdom. Licensed Copy: Wang Bin, ISO/Exchange China Standards Information Centre, 10 September 2003, Uncontrolled Copy, (c) BSIEN13844:2002(E) 4 Introduction ThisEuropeanStandardspecifiesmethodsforthedeterminationofthermalshr
19、inkageofmonofilaments. Shrinkageisoneofthemainproperties,whichcharacterisepolymericmonofilaments. Licensed Copy: Wang Bin, ISO/Exchange China Standards Information Centre, 10 September 2003, Uncontrolled Copy, (c) BSIEN13844:2002(E) 5 1Scope ThisEuropeanStandardspecifiesthreemethodsforthedeterminati
20、onofshrinkage: Determinationofshrinkageinhotairundertension; Determinationofshrinkageinhotairwithouttension; Determinationofshrinkageinhotwaterwithouttension. 2 Normativereferences ThisEuropeanStandardincorporates,bydatedorundatedreference,provisionsfromotherpublications.These normativereferencesare
21、citedattheappropriateplacesinthetextandthepublicationsarelistedhereafter.For datedreferences,subsequentamendmentstoorrevisionsofanyofthesepublicationsapplytothisEuropean Standardonlywhenincorporatedinitbyamendmentorrevision.Forundatedreferencesthelatesteditionofthe publicationreferredtoapplies(inclu
22、dingamendments). EN20139, TextilesStandardatmospheresforconditioningandtesting(ISO139:1973) EN13392:2001, TextilesMonofilamentsDeterminationoflineardensity 3 Termsanddefinitions ForthepurposesofthisEuropeanStandard,thefollowingtermsanddefinitionsapply. 3.1 monofilament yarnmadewithonlyonefilament 3.
23、2 lineardensity massperunitlengthofamonofilamentexpressedintexoritsmultiplesorsubmultiples EN13392:2001 NOTE 1tex=1g/1000m. 3.3 thermalshrinkage decreaseinmonofilamentlengthcausedbyexposuretoheat,expressedasapercentageofitsoriginallength 3.4 tension forceappliedtoatestspecimenduringatest 3.5 package
24、 methodofpresentationofthemonofilament,e.g.spool,tube,cone Licensed Copy: Wang Bin, ISO/Exchange China Standards Information Centre, 10 September 2003, Uncontrolled Copy, (c) BSIEN13844:2002(E) 6 4 Determinationofshrinkageinhotairundertension 4.1Principle Testspecimensaresubjectedtohotairundertensio
25、nforaspecifiedtime.Thermalshrinkageisindicatedbya pointeronascaleorbyanelectronicindicator. 4.2Apparatus 4.2.1 Athermalshrinkagechamber(seeFigure1)withthefollowingspecification: a) minimumheatinglengthof200mm; b) distancebetweenheatingplatesof3mmto10mm; c) operatingtemperatureintherange110Cto250C; d
26、) temperaturestabilitywithalimitdeviationof2C; e) shrinkagescalewithatoleranceof0,1%between0and10%andof0,5%above10%; f) constanttemperaturedistributioninatleast80%oftheovenlength. Key 1Shrinkagescale 2Lengthofchamber 3Monofilament 4Fixedclamp 5Tensionmass 6Heatingplates 7Calibrationpoint 8Distancebe
27、tweenplates Figure1Anexampleoftestingthermalshrinkageundertension Licensed Copy: Wang Bin, ISO/Exchange China Standards Information Centre, 10 September 2003, Uncontrolled Copy, (c) BSIEN13844:2002(E) 7 4.2.2 Arangeoftensionmasses. 4.2.3 Astopwatchorothersuitabletimingdevice. 4.3Procedure 4.3.1 Prep
28、aringthetestspecimens a) Asaminimum,thefirstlayerofproductonthepackageisrejected.Aminimumofthreetestspecimensisthen takenfromthepackage; b) Beforetesting,thetestspecimensshallbeconditionedinthestandardatmosphere,asdescribedinEN20 139, untilstable(seeAnnexA). 4.3.2 Thermaltreatmentofthetestspecimens
29、a) Switchontheovenandsetthetemperatureaccordingtothepolymerictypetobetested(seeTable1); Table1Polymerictypetable Polymer Symbol Temperature a Time C cN/dtex s Polyamide66 PA66 180 0,02 120 Polyamide6 PA6 150 0,02 120 Polyamide11 PA11 140 0,02 120 Polyamide12 PA12 140 0,02 120 Polyamide610 PA610 150
30、0,02 120 Polyamide612 PA612 150 0,02 120 Poly(ethyleneterephthalate) PET a 180 0,02 120 Polypropylene PP 120 0,02 120 Poly(phenylenesulphide) PPS 200 0,02 120 Polyetheretherketone PEEK 200 0,02 120 Poly(butyleneterephthalate) PBT 180 0,02 120 NOTE Forotherpolymerictypes,thetemperaturewillbeagreedbet
31、weenparties. a ReferredtoasPESinISO2076“TextilesManmadefibresGenericnames“ b) Waituntilthetemperatureisreachedandstabilised; c) Calculatethevalueofthetensionforcefromthelineardensityusingthefollowingformula: W= T a where W isthetensionforce,incN; A isafunctionofthematerialtobetested,incN/dtex(seeTab
32、le1);and isthelineardensityaccordingtoEN13392; d) Preparethetensionforceaccordingtothecalculationwithinalimitdeviationof5%; e) Atemperaturecalibrationshouldbecarriedoutattheexactpointinthechamberwheretheyarnistested; Licensed Copy: Wang Bin, ISO/Exchange China Standards Information Centre, 10 Septem
33、ber 2003, Uncontrolled Copy, (c) BSIEN13844:2002(E) 8 f) Mountthetestspecimeninthespecimenholder.Checkthatthemonofilamentisstraightandtensioned accordingtoc); g) Gentlyexposethetestspecimentothehotairchamberinthepositionwherethecalibrationhasbeen performed; h) Exposethetestspecimenforthetimementione
34、dinTable12s; i) Afterthistime,immediatelyreadthepercentageshrinkageonthescaleorindicator; j) Removethetestspecimen; k) Repeattheprocedurefortheothertwospecimens; l) Calculatethearithmeticmeanofthethreetestspecimens. 5 Determinationofshrinkageinhotairwithouttension 5.1Principle Testspecimensofknownle
35、ngtharesubjectedtensionfreetohotairforaspecifiedtimeandthenthethermal shrinkageisdetermined. 5.2Apparatus 5.2.1 Alengthmeasuringdevicecapableofmeasuringatleast1mofmonofilamenttoalimitdeviationof0,1% underanappliedtensionof0,05cN/dtex0,005cN/dtexbasedonthelineardensity. 5.2.2 Anappropriatetensioningd
36、evicetosetthetensionduringlengthmeasurement. 5.2.3 Astopwatchorothersuitabletimingdevice. 5.2.4 Anovenwiththefollowingspecification: a) temperaturerangeof110Cto250C; b) fanassistedaircirculationtoensurethatthetemperatureinthetreatmentspaceismaintainedwithin2,0C; c) atreatmentspacenotgreaterthan80%of
37、thevolumeoftheoven. 5.3Procedure 5.3.1 Preparingthetestspecimens a) Asaminimum,thefirstlayerofproductonthepackageisrejected.Aminimumofthreetestspecimensis takenfromthepackage; b) Beforetesting,thetestspecimensshallbeconditionedinthestandardatmosphere,asdescribedinEN20139, untilstable(seeAnnexA). 5.3
38、.2 Measuringtheoriginallengthofthetestspecimens a) Thetestspecimensareplacedseparatelyonthelengthmeasuringdevicespecifiedin5.2.1andcarefully tensioned; b) Whilststillundertension,thetestspecimensaremarkedattheoriginallength, L O (seeAnnexB).Eachtest specimenisthenformedintoanapproximately100mmdiamet
39、ercoilandsecuredwithasuitableclip. Licensed Copy: Wang Bin, ISO/Exchange China Standards Information Centre, 10 September 2003, Uncontrolled Copy, (c) BSIEN13844:2002(E) 9 5.3.3 Thermaltreatmentofthetestspecimens a) Thedurationofhotairtreatmentis10min1min; b) Thetreatmenttemperaturedependsuponthepol
40、ymerictypeundertestandisgiveninTable1; c) TheovenisswitchedonandthetemperaturesetaccordingtoTable1; d) Whentheovenhasreached,andisstableat,thecorrecttemperature,eachtestspecimenissuspendedusing asuitablemeansinacentralpositionintheoven.Thedooristhenclosedimmediatelytoreduceheatloss; e) After10min1mi
41、n,thetestspecimensareremovedandallowedtocoolinthestandardatmosphereforat least1h. 5.3.4 Measuringthelengthofthetestspecimensaftertreatment a) Thetestspecimensareplacedseparatelyonthelengthmeasuringdevicespecifiedin5.2.1andcarefully tensioned; b) Whilststillundertension,thedistancebetweenthemarksonea
42、chtestspecimenismeasured.Thisisthe shrunkenlength, L S . 5.4Calculationofresults Thethermalshrinkageofeachofthetestspecimensiscalculatedasapercentageoftheinitiallengthusingthe formula: Thermalshrinkage(%)= o s o 100 ) ( L L L - where L o istheoriginallengthoftestspecimen,inm; L s isthelengthoftestsp
43、ecimeninshrunkenstate,inm; Thearithmeticmeanofthethreetestspecimensisthencalculated. 6 Determinationofshrinkageinhotwaterwithouttension 6.1Principle Testspecimensofknownlengtharetreatedtensionfreeinhotwaterforaspecifiedtimeandthenthethermal shrinkageisdetermined. Licensed Copy: Wang Bin, ISO/Exchang
44、e China Standards Information Centre, 10 September 2003, Uncontrolled Copy, (c) BSIEN13844:2002(E) 10 6.2Apparatus 6.2.1 Alengthmeasuringdevicecapableofmeasuringatleast1mofmonofilamenttoalimitdeviationof0,1% underanappliedtensionof0,05cN/dtex0,005cN/dtexbasedonthelineardensity. 6.2.2 Anappropriatetensioningdevicetosetthetensionduringlengthmeasurement. 6.2.3 Astopwatchorot
