SIST EN 13844:2003

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Textilien - Monofile - Bestimmung des WärmeschrumpfverhaltensTextiles - Monofilaments - Détermination du retrait a la chaleurTextiles - Monofilaments - Determination of thermal shrinkage59.060.20Umetna vlaknaMan-made fibresICS:Ta slovenski standard je istoveten z:EN 13844:2002SIST EN 13844:2003en01-februar-2003SIST EN 13844:2003SLOVENSKI
STANDARD



SIST EN 13844:2003



EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 13844December 2002ICS 59.060.20English versionTextiles - Monofilaments - Determination of thermal shrinkageTextiles - Monofilaments - Détermination du retrait à lachaleurTextilien - Monofile - Bestimmung desWärmeschrumpfverhaltensThis European Standard was approved by CEN on 23 October 2002.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Management Centre or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2002 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 13844:2002 ESIST EN 13844:2003



EN 13844:2002 (E)2ContentspageForeword.3Introduction.41Scope.52Normative references.53Terms and definitions.54Determination of shrinkage in hot air under tension.64.1Principle.64.2Apparatus.64.3Procedure.75Determination of shrinkage in hot air without tension.85.1Principle.85.2Apparatus.85.3Procedure.85.4Calculation of results.96Determination of shrinkage in hot water without tension.96.1Principle.96.2Apparatus.106.3Procedure.116.4Calculation of results.127Test report.13Annex A (informative)
Recommended conditioning time versus diameter.14Annex B (informative)
An example of a procedure for marking the length LO and measuring the lengthLS under a pretension.15SIST EN 13844:2003



EN 13844:2002 (E)3ForewordThis document (EN 13844:2002) has been prepared by Technical Committee CEN /TC 248, "Textiles and textileproducts" the secretariat of which is held by BSI.This European Standard shall be given the status of a national standard, either by publication of an identical text orby endorsement, at the latest by June 2003, and conflicting national standards shall be withdrawn at the latest byJune 2003.In this European Standard the Annexes A and B are informative.According to the CEN/CENELEC Internal Regulations, the national standards organizations of the followingcountries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland,France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain,Sweden, Switzerland and the United Kingdom.SIST EN 13844:2003



EN 13844:2002 (E)4IntroductionThis European Standard specifies methods for the determination of thermal shrinkage of monofilaments.Shrinkage is one of the main properties, which characterise polymeric monofilaments.SIST EN 13844:2003



EN 13844:2002 (E)51 ScopeThis European Standard specifies three methods for the determination of shrinkage:—Determination of shrinkage in hot air under tension;—Determination of shrinkage in hot air without tension;—Determination of shrinkage in hot water without tension.2 Normative referencesThis European Standard incorporates, by dated or undated reference, provisions from other publications. Thesenormative references are cited at the appropriate places in the text and the publications are listed hereafter. Fordated references, subsequent amendments to or revisions of any of these publications apply to this EuropeanStandard only when incorporated in it by amendment or revision. For undated references the latest edition of thepublication referred to applies (including amendments).EN 20139, Textiles — Standard atmospheres for conditioning and testing (ISO 139:1973)EN 13392:2001, Textiles — Monofilaments - Determination of linear density3 Terms and definitionsFor the purposes of this European Standard, the following terms and definitions apply.3.1monofilamentyarn made with only one filament3.2linear densitymass per unit length of a monofilament expressed in tex or its multiples or submultiples[EN 13392:2001]NOTE1 tex = 1 g/1000 m.3.3thermal shrinkagedecrease in monofilament length caused by exposure to heat, expressed as a percentage of its original length3.4tensionforce applied to a test specimen during a test3.5packagemethod of presentation of the monofilament, e.g. spool, tube, coneSIST EN 13844:2003



EN 13844:2002 (E)64 Determination of shrinkage in hot air under tension4.1 PrincipleTest specimens are subjected to hot air under tension for a specified time.
Thermal shrinkage is indicated by apointer on a scale or by an electronic indicator.4.2 Apparatus4.2.1A thermal shrinkage chamber (see Figure 1) with the following specification:a) minimum heating length of 200 mm;b) distance between heating plates of 3 mm to 10 mm;c) operating temperature in the range 110 °C to 250 °C;d) temperature stability with a limit deviation of ± 2 °C;e) shrinkage scale with atolerance of 0,1 % between 0 and 10 % and of 0,5 % above 10 %;f) constant temperature distribution in at least 80 % of the oven length.Key1
Shrinkage scale2
Length of chamber3
Monofilament4
Fixed clamp5
Tension mass6
Heating plates7
Calibration point8
Distance between platesFigure 1 — An example of testing thermal shrinkage under tensionSIST EN 13844:2003



EN 13844:2002 (E)74.2.2A range of tension masses.4.2.3A stopwatch or other suitable timing device.4.3 Procedure4.3.1 Preparing the test specimensa) As a minimum, the first layer of product on the package is rejected.
A minimum of three test specimens is thentaken from the package;b) Before testing, the test specimens shall be conditioned in the standard atmosphere, as described in EN 2
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