EN 14704-3:2006
(Main)Determination of the elasticity of fabrics - Part 3: Narrow fabrics
Determination of the elasticity of fabrics - Part 3: Narrow fabrics
This standard describes the test methods which can be used to measure the elasticity and related properties of narrow fabrics. Two methods are itemised: one for the purpose of product quality assurance (method A), and the other for product performance when in use (method B).
Bestimmung der Elastizität von Flächengebilden - Teil 3: Schmaltextilien
Diese Norm beschreibt die Prüfverfahren, die zur Messung der Elastizität und zugehöriger Eigenschaften von Schmaltextilien verwendet werden können. Zwei Verfahren werden genannt, von denen das eine (Verfahren A) der Sicherung der Produktqualität und das andere (Verfahren B) den Gebrauchseigenschaften des Produktes dient.
Détermination de l'élasticité des étoffes - Partie 3 : Etoffes étroites
La présente norme décrit des méthodes d'essai qui peuvent être utilisées pour mesurer l'élasticité et les propriétés afférentes des étoffes étroites. Deux méthodes sont décrites, l'une à destination de l'assurance qualité du produit (méthode A), l'autre à la performance du produit en conditions d'utilisation (méthode B).
Ugotavljanje elastičnosti ploskovnih tekstilij - 3. del: Ozki trakovi
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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Determination of the elasticity of fabrics - Part 3: Narrow fabricsNRYLDétermination de l'élasticité des étoffes - Partie 3 : Etoffes
étroitesBestimmung der Elastizität von Flächengebilden - Teil 3: SchmaltextilienTa slovenski standard je istoveten z:EN 14704-3:2006SIST EN 14704-3:2007en;fr;de59.080.30TkanineTextile fabricsICS:SLOVENSKI
STANDARDSIST EN 14704-3:200701-julij-2007
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 14704-3December 2006ICS 59.080.30 English VersionDetermination of the elasticity of fabrics - Part 3: Narrow fabricsDétermination de l'élasticité des étoffes - Partie 3 : Etoffes étroitesBestimmung der Elastizität von Flächengebilden - Teil 3:SchmaltextilienThis European Standard was approved by CEN on 28 October 2006.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 Central Secretariat 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 Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania,Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2006 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 14704-3:2006: E
Example of a typical cycling graph for method A.15 Annex B (informative)
Procedure for sampling.16 Annex C (informative)
Clamping and holding devices.17
1 Scope This standard describes the test methods which can be used to measure the elasticity and related properties of narrow fabrics.
Two methods are itemised: one for the purpose of product quality assurance (method A), and the other for product performance when in use (method B).
2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN ISO 139, Textiles – Standard atmospheres for conditioning and testing (ISO 139:2005) EN ISO 7500-1, Metallic materials – Verification of static uniaxial testing machines – Part 1: Tension/compression testing machines – Verification and calibration of the force-measuring system (ISO 7500-1:2004) EN ISO 10012, Measurement management systems - Requirements for measurement processes and measuring equipment (ISO 10012:2003) 3 Terms and definitions For the purposes of this European standard the following terms and definitions apply. 3.1 narrow fabric woven or knitted construction intended for use as a trim, binding, edging, strapping or harness, and designed to be used in its full width 3.2 elasticity property of a material by virtue of which it tends to recover its original size and shape immediately after removing the force causing deformation 3.3 constant-rate-of-extension (CRE) testing machine tensile testing machine provided with one clamp which is stationary and another clamp, which moves with a constant speed throughout the test, the entire testing system being virtually free from deflection 3.4 strip test specimen test specimen in which the full width is gripped in the jaws of the testing machine 3.5 gauge length distance between the two effective clamping points of a testing device, for this method where line clamps are employed, it is the distance between the two contact points 3.6 slack mounting insertion of a strip test specimen in the line clamps of the upper jaw, allowing it to hang freely under its own weight, guided by the hand to ensure perpendicular alignment to the line of pulling force, without any force being applied
3.15 force decay due to exercising loss of force, calculated and expressed as a percentage, as measured and recorded at the same elongation point on two different cycles when the test specimen is cycled several times between zero and a specified elongation (see Annex A) 3.16 un-recovered elongation ratio of the unrecovered extension of the test specimen after cycling, to a specified force or extension, to its initial length, expressed as a % 3.17 recovered elongation unrecovered elongation, expressed as a %, subtracted from 100 % 3.18 elastic recovery recovered elongation expressed as a % of the total elongation
Under conditions of use, the accuracy of the apparatus shall be at least class 1 of EN ISO 7500-1.
The error of the indicated or recorded maximum force at any point in the range in which the machine is used shall not exceed 1 %, and the error of the indicated or recorded jaw separation shall not exceed 1 mm. b) If recording of force or elongation is obtained by means of data acquisition boards and software, the frequency of data collection shall be at least 8/sec. c) Machine shall be capable of constant rates of extension including 20 mm/min to 500 mm/min with an accuracy of (±) 10 %. d) Machine shall be capable of variable gauge length settings including 100 mm to 250 mm, to an accuracy of (±) 1 mm. e) Clamping or holding devices shall be positioned with the centre in line with the applied force.
The machine shall be calibrated, where applicable, with the grips in position and the jaw faces closed. The jaws shall be capable of holding the test specimen without allowing it to slip and designed so that they do not cut or otherwise weaken the test specimen.
Line clamps, as shown in Figure C.1, shall consist of two jaws, one being of steel plate, the other having a convex 3 mm radius.
The line of contact of the jaws shall be perpendicular to the line of increasing force. The clamping faces shall be in the same plane.
The line clamp jaws shall not be less than the width of the test specimen and preferably have a width of (70 ± 6) mm. NOTE 1 Significant levels of work have shown this type of line clamp is the preferred type for elastane/elastodiene containing fabrics as fabric slippage is eliminated.
If a fabric slips the elongation values are inaccurate. NOTE 2 Pneumatic operated grips are recommended as hand tightening or manual grips can cause distortion of the test specimen. The air pressure should be sufficient to prevent slippage but should not cut or otherwise weaken the test specimen. 6.3 Equipment, for cutting test specimens to the required dimensions. 6.4 Calibrated metal rule, graduated in mm. 7 Atmosphere for conditioning and testing The atmospheres for pre-conditioning, conditioning and testing shall be as specified in EN ISO 139. The narrow fabric samples shall be conditioned for a minimum of 20 h in a tension free state.
8 Preparation of test specimens 8.1 General A set of test specimens from each laboratory sample, shall be cut in the length direction. A set shall consist of a minimum of five test specimens.
If the sample is supplied on role and of sufficient length, remove and discard the first 500 mm. Cut the required number of specimens to the correct length, rejecting a minimum of 300 mm in between each of the specimens. 8.2 Test specimen preparation For method A and method B, each test specimen shall be cut to a length of 150 mm.
NOTE If for method A unrecovered elongation is determined at the end of the test, place (100 ± 1) mm reference (bench) marks centrally and perpendicular to the specimen length. 9 Procedure
9.1 Method A 9.1.1 General 9.1.1.1 Locate the line clam
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