EN 13844-2002 en Textiles - Monofilaments - Determination of thermal shrinkage《织物 单丝 热缩率的测定》.pdf

1、BRITISH 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 BS EN 13844:2002 This British Standard was published under the authority of the Standards Policy and Strategy Committee o

2、n 15 April 2003 BSI 15 April 2003 ISBN 0 580 41583 X National 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:

3、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 BSI Catalogue under the section entitled “International St

4、andards 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 for its correct application. Compliance with a British Stand

5、ard 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 interests informed; monitor related international and Europea

6、n 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 15 and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publi

7、cation Amd. No. Date CommentsEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM EN13844 December2002 ICS59.060.20 Englishversion TextilesMonofilamentsDeterminationofthermalshrinkage TextilesMonofilamentsDterminationduretraitla chaleur TextilienMonofileBestimmungdes Wrmeschrumpfverhaltens ThisEuropeanSta

8、ndardwasapprovedbyCENon23October2002. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapp

9、licationtotheManagementCentreortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheManagementCentrehasthesamestatusasthe official versions. CENmembers

10、arethenationalstandardsbodiesofAustria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece, Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG

11、 ManagementCentre:ruedeStassart,36B1050Brussels 2002CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.EN13844:2002EEN13844:2002(E) 2 Contents page Foreword3 Introduction .4 1 Scope 5 2 Normativereferences 5 3 Termsanddefinitions. .5 4 Determinationofshr

12、inkageinhotairundertension . 6 4.1 Principle6 4.2 Apparatus .6 4.3 Procedure .7 5 Determinationofshrinkageinhotairwithouttension . .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.

13、3 Procedure .11 6.4 Calculationofresults 12 7 Testreport . .13 AnnexA (informative) Recommendedconditioningtimeversusdiameter.14 AnnexB (informative) Anexampleofaprocedureformarkingthelength L O andmeasuringthelength L S underapretension 15EN13844:2002(E) 3 Foreword Thisdocument(EN13844:2002)hasbeen

14、preparedbyTechnicalCommitteeCEN/TC248,“Textilesandtextile products“thesecretariatofwhichisheldbyBSI. ThisEuropeanStandardshallbegiventhestatusofanationalstandard,eitherbypublicationofanidenticaltextor byendorsement,atthelatestbyJune2003,andconflictingnationalstandardsshallbewithdrawnatthelatestby Ju

15、ne2003. InthisEuropeanStandardtheAnnexesAandBareinformative. AccordingtotheCEN/CENELECInternalRegulations,thenationalstandardsorganizationsofthefollowing countriesareboundtoimplementthisEuropeanStandard:Austria,Belgium,CzechRepublic,Denmark,Finland, France,Germany,Greece,Iceland,Ireland,Italy,Luxemb

16、ourg,Malta,Netherlands,Norway,Portugal,Spain, Sweden,SwitzerlandandtheUnitedKingdom.EN13844:2002(E) 4 Introduction ThisEuropeanStandardspecifiesmethodsforthedeterminationofthermalshrinkageofmonofilaments. Shrinkageisoneofthemainproperties,whichcharacterisepolymericmonofilaments.EN13844:2002(E) 5 1Sc

17、ope ThisEuropeanStandardspecifiesthreemethodsforthedeterminationofshrinkage: Determinationofshrinkageinhotairundertension; Determinationofshrinkageinhotairwithouttension; Determinationofshrinkageinhotwaterwithouttension. 2 Normativereferences ThisEuropeanStandardincorporates,bydatedorundatedreferenc

18、e,provisionsfromotherpublications.These normativereferencesarecitedattheappropriateplacesinthetextandthepublicationsarelistedhereafter.For datedreferences,subsequentamendmentstoorrevisionsofanyofthesepublicationsapplytothisEuropean Standardonlywhenincorporatedinitbyamendmentorrevision.Forundatedrefe

19、rencesthelatesteditionofthe publicationreferredtoapplies(includingamendments). EN20139, TextilesStandardatmospheresforconditioningandtesting(ISO139:1973) EN13392:2001, TextilesMonofilamentsDeterminationoflineardensity 3 Termsanddefinitions ForthepurposesofthisEuropeanStandard,thefollowingtermsanddef

20、initionsapply. 3.1 monofilament yarnmadewithonlyonefilament 3.2 lineardensity massperunitlengthofamonofilamentexpressedintexoritsmultiplesorsubmultiples EN13392:2001 NOTE 1tex=1g/1000m. 3.3 thermalshrinkage decreaseinmonofilamentlengthcausedbyexposuretoheat,expressedasapercentageofitsoriginallength

21、3.4 tension forceappliedtoatestspecimenduringatest 3.5 package methodofpresentationofthemonofilament,e.g.spool,tube,coneEN13844:2002(E) 6 4 Determinationofshrinkageinhotairundertension 4.1Principle Testspecimensaresubjectedtohotairundertensionforaspecifiedtime.Thermalshrinkageisindicatedbya pointero

22、nascaleorbyanelectronicindicator. 4.2Apparatus 4.2.1 Athermalshrinkagechamber(seeFigure1)withthefollowingspecification: a) minimumheatinglengthof200mm; b) distancebetweenheatingplatesof3mmto10mm; c) operatingtemperatureintherange110Cto250C; d) temperaturestabilitywithalimitdeviationof2C; e) shrinkag

23、escalewithatoleranceof0,1%between0and10%andof0,5%above10%; f) constanttemperaturedistributioninatleast80%oftheovenlength. Key 1Shrinkagescale 2Lengthofchamber 3Monofilament 4Fixedclamp 5Tensionmass 6Heatingplates 7Calibrationpoint 8Distancebetweenplates Figure1Anexampleoftestingthermalshrinkageunder

24、tensionEN13844:2002(E) 7 4.2.2 Arangeoftensionmasses. 4.2.3 Astopwatchorothersuitabletimingdevice. 4.3Procedure 4.3.1 Preparingthetestspecimens a) Asaminimum,thefirstlayerofproductonthepackageisrejected.Aminimumofthreetestspecimensisthen takenfromthepackage; b) Beforetesting,thetestspecimensshallbec

25、onditionedinthestandardatmosphere,asdescribedinEN20 139, untilstable(seeAnnexA). 4.3.2 Thermaltreatmentofthetestspecimens a) Switchontheovenandsetthetemperatureaccordingtothepolymerictypetobetested(seeTable1); Table1Polymerictypetable Polymer Symbol Temperature a Time C cN/dtex s Polyamide66 PA66 18

26、0 0,02 120 Polyamide6 PA6 150 0,02 120 Polyamide11 PA11 140 0,02 120 Polyamide12 PA12 140 0,02 120 Polyamide610 PA610 150 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 Polyetheretherketon

27、e PEEK 200 0,02 120 Poly(butyleneterephthalate) PBT 180 0,02 120 NOTE Forotherpolymerictypes,thetemperaturewillbeagreedbetweenparties. a ReferredtoasPESinISO2076“TextilesManmadefibresGenericnames“ b) Waituntilthetemperatureisreachedandstabilised; c) Calculatethevalueofthetensionforcefromthelinearden

28、sityusingthefollowingformula: W= T a where W isthetensionforce,incN; A isafunctionofthematerialtobetested,incN/dtex(seeTable1);and isthelineardensityaccordingtoEN13392; d) Preparethetensionforceaccordingtothecalculationwithinalimitdeviationof5%; e) Atemperaturecalibrationshouldbecarriedoutattheexact

29、pointinthechamberwheretheyarnistested;EN13844:2002(E) 8 f) Mountthetestspecimeninthespecimenholder.Checkthatthemonofilamentisstraightandtensioned accordingtoc); g) Gentlyexposethetestspecimentothehotairchamberinthepositionwherethecalibrationhasbeen performed; h) Exposethetestspecimenforthetimementio

30、nedinTable12s; i) Afterthistime,immediatelyreadthepercentageshrinkageonthescaleorindicator; j) Removethetestspecimen; k) Repeattheprocedurefortheothertwospecimens; l) Calculatethearithmeticmeanofthethreetestspecimens. 5 Determinationofshrinkageinhotairwithouttension 5.1Principle Testspecimensofknown

31、lengtharesubjectedtensionfreetohotairforaspecifiedtimeandthenthethermal shrinkageisdetermined. 5.2Apparatus 5.2.1 Alengthmeasuringdevicecapableofmeasuringatleast1mofmonofilamenttoalimitdeviationof0,1% underanappliedtensionof0,05cN/dtex0,005cN/dtexbasedonthelineardensity. 5.2.2 Anappropriatetensionin

32、gdevicetosetthetensionduringlengthmeasurement. 5.2.3 Astopwatchorothersuitabletimingdevice. 5.2.4 Anovenwiththefollowingspecification: a) temperaturerangeof110Cto250C; b) fanassistedaircirculationtoensurethatthetemperatureinthetreatmentspaceismaintainedwithin2,0C; c) atreatmentspacenotgreaterthan80%

33、ofthevolumeoftheoven. 5.3Procedure 5.3.1 Preparingthetestspecimens a) Asaminimum,thefirstlayerofproductonthepackageisrejected.Aminimumofthreetestspecimensis takenfromthepackage; b) Beforetesting,thetestspecimensshallbeconditionedinthestandardatmosphere,asdescribedinEN20139, untilstable(seeAnnexA). 5

34、.3.2 Measuringtheoriginallengthofthetestspecimens a) Thetestspecimensareplacedseparatelyonthelengthmeasuringdevicespecifiedin5.2.1andcarefully tensioned; b) Whilststillundertension,thetestspecimensaremarkedattheoriginallength, L O (seeAnnexB).Eachtest specimenisthenformedintoanapproximately100mmdiam

35、etercoilandsecuredwithasuitableclip.EN13844:2002(E) 9 5.3.3 Thermaltreatmentofthetestspecimens a) Thedurationofhotairtreatmentis10min1min; b) ThetreatmenttemperaturedependsuponthepolymerictypeundertestandisgiveninTable1; c) TheovenisswitchedonandthetemperaturesetaccordingtoTable1; d) Whentheovenhasr

36、eached,andisstableat,thecorrecttemperature,eachtestspecimenissuspendedusing asuitablemeansinacentralpositionintheoven.Thedooristhenclosedimmediatelytoreduceheatloss; e) After10min1min,thetestspecimensareremovedandallowedtocoolinthestandardatmosphereforat least1h. 5.3.4 Measuringthelengthofthetestspe

37、cimensaftertreatment a) Thetestspecimensareplacedseparatelyonthelengthmeasuringdevicespecifiedin5.2.1andcarefully tensioned; b) Whilststillundertension,thedistancebetweenthemarksoneachtestspecimenismeasured.Thisisthe shrunkenlength, L S . 5.4Calculationofresults Thethermalshrinkageofeachofthetestspe

38、cimensiscalculatedasapercentageoftheinitiallengthusingthe formula: Thermalshrinkage(%)= o s o 100 ) ( L L L - where L o istheoriginallengthoftestspecimen,inm; L s isthelengthoftestspecimeninshrunkenstate,inm; Thearithmeticmeanofthethreetestspecimensisthencalculated. 6 Determinationofshrinkageinhotwa

39、terwithouttension 6.1Principle Testspecimensofknownlengtharetreatedtensionfreeinhotwaterforaspecifiedtimeandthenthethermal shrinkageisdetermined.EN13844:2002(E) 10 6.2Apparatus 6.2.1 Alengthmeasuringdevicecapableofmeasuringatleast1mofmonofilamenttoalimitdeviationof0,1% underanappliedtensionof0,05cN/

40、dtex0,005cN/dtexbasedonthelineardensity. 6.2.2 Anappropriatetensioningdevicetosetthetensionduringlengthmeasurement. 6.2.3 Astopwatchorothersuitabletimingdevice. 6.2.4 Awatervesselwiththefollowingspecification: a) awatercapacityofaminimum40timesthecombinedmassofsamplesandsampleholder; b) aheatingdevi

41、ceandcontrollertoheatthewaterandkeepitatthesettemperatureof95C1C; c) asampleholdersuitableforholdingthetestspecimen(s)inaloosestateandavoidingcontactwiththeheating elements(seeFigure2asanexample).EN13844:2002(E) 11 Key 1Cover 2Temperaturesensor 3Waterlevel 4Specimenholder 5Testspecimen 6Separator 7H

42、eatingelement Figure2Watervessel 6.3Procedure 6.3.1 Preparingthetestspecimens a) Asaminimum,thefirstlayerofproductonthepackageisrejected.Aminimumofthreetestspecimensis takenfromthepackage; b) Beforetesting,thespecimensshallbeconditionedinthestandardatmosphere,asdescribedinEN20139,until stable(seeAnn

43、exB).EN13844:2002(E) 12 6.3.2 Measuringtheoriginallengthofthetestspecimens a) Thetestspecimensareplacedseparatelyonthelengthmeasuringdevicespecifiedin6.2.1andcarefully tensioned; b) Whilststillundertension,thetestspecimensaremarkedattheoriginallength, L O (seeAnnexB).Eachtest specimenisthenformedintoanapproximately100mmdiametercoilandsecuredwithasuitableclip. 6.3.3 Thermaltreatmentofthetestspecimens a) Thetreatmenttemperatureis95C1C; b) Eac