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
