1、BSI Standards PublicationBS EN ISO 13935-2:2014Textiles Seam tensileproperties of fabrics and made-up textile articlesPart 2: Determination of maximum force toseam rupture using the grab method (ISO13935-2:2014)BS EN ISO 13935-2:2014 BRITISH STANDARDNational forewordThis British Standard is the UK i
2、mplementation of EN ISO13935-2:2014. It supersedes BS EN ISO 13935-2:1999 which iswithdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee TCI/24, Physical testing of textiles.A list of organizations represented on this committee can beobtained on request to its secretar
3、y.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2014. Published by BSI StandardsLimited 2014ISBN 978 0 580 76995 5ICS 59.080.30; 61.020Compliance with a British Standard cann
4、ot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 May 2014.Amendments issued since publicationDate Text affectedEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 13935-2 April 2014 ICS 59.080.30
5、; 61.020 Supersedes EN ISO 13935-2:1999English Version Textiles - Seam tensile properties of fabrics and made-up textile articles - Part 2: Determination of maximum force to seam rupture using the grab method (ISO 13935-2:2014) Textiles - Proprits de rsistance la traction des couturesdtoffes et dart
6、icles textiles confectionns - Partie 2: Dtermination de la force maximale avant rupture des coutures par la mthode darrachement (Grab test) (ISO 13935-2:2014) Textilien - Zugversuche an Nhten in textilen Flchengebilden und Konfektionstextilien - Teil 2: Bestimmung der Hchstzugkraft von Nhten mit dem
7、 Grab-Zugversuch (ISO 13935-2:2014) This European Standard was approved by CEN on 11 February 2014. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-
8、to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC 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 transl
9、ation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland
10、, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION
11、COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2014 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 13935-2:2014 EBS EN ISO 13935-2:2014EN ISO 1393
12、5-2:2014 (E) 3 Foreword This document (EN ISO 13935-2:2014) has been prepared by Technical Committee ISO/TC 38 “Textiles” in collaboration with Technical Committee CEN/TC 248 “Textiles and textile products” the secretariat of which is held by BSI. This European Standard shall be given the status of
13、a national standard, either by publication of an identical text or by endorsement, at the latest by October 2014, and conflicting national standards shall be withdrawn at the latest by October 2014. Attention is drawn to the possibility that some of the elements of this document may be the subject o
14、f patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN ISO 13935-2:1999. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement thi
15、s European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovaki
16、a, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 13935-2:2014 has been approved by CEN as EN ISO 13935-2:2014 without any modification. BS EN ISO 13935-2:2014ISO 13935-2:2014(E) ISO 2014 All rights reserved iiiContents PageForeword ivIntroduc
17、tion v1 Scope . 12 Normative references 13 Terms and definitions . 14 Principle 25 Sampling 26 Apparatus . 27 Atmosphere for conditioning and testing 38 Preparation of seams and of test specimens . 38.1 Preparation of seams, if required, before testing 38.2 Dimensions . 38.3 Preparation of test spec
18、imens . 49 Procedure. 59.1 Gauge length 59.2 Rate of extension . 59.3 Mounting of test specimens . 59.4 Operation . 610 Calculation and expression of results . 611 Test report . 6Annex A (informative) Arrangements of jaws for the grab test . 8Bibliography 9BS EN ISO 13935-2:2014ISO 13935-2:2014(E)Fo
19、rewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a tech
20、nical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
21、 electrotechnical standardization.The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document
22、was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2. www.iso.org/directivesAttention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent r
23、ights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received. www.iso.org/patentsAny trade name used in this document is information given for the convenience of users and does not constitute
24、an endorsement.For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary informationThe committee
25、 responsible for this document is ISO/TC 38, Textiles, Subcommittee SC 24, Conditioning atmospheres and physical tests for textile fabrics .This second edition cancels and replaces the first edition (ISO 13935-2:1999), of which it constitutes a minor revision.ISO 13935 consists of the following part
26、s, under the general title Textiles Seam tensile properties of fabrics and made-up textile articles: Part 1: Determination of maximum force to seam rupture using the strip method Part 2: Determination of maximum force to seam rupture using the grab methodiv ISO 2014 All rights reservedBS EN ISO 1393
27、5-2:2014ISO 13935-2:2014(E)IntroductionThis part of ISO 13935 has been prepared in the context of several test methods for determination of certain mechanical properties of textiles using mainly tensile testing machines, e.g. tensile properties, seam tensile properties, tear properties, seam slippag
28、e. The procedure for these standards agrees where appropriate. The results obtained by one of the methods should not be compared with those obtained by the other methods. See Bibliography for informative references.Where it is intended to compare the seam maximum force values of sewn seams with the
29、fabric maximum force, it is important to use the same type of test, test conditions and test specimens in the tests in this part of ISO 13935 and ISO 13934-2 (see Bibliography). ISO 2014 All rights reserved vBS EN ISO 13935-2:2014BS EN ISO 13935-2:2014Textiles Seam tensile properties of fabrics and
30、made-up textile articles Part 2: Determination of maximum force to seam rupture using the grab method1 ScopeThis part of ISO 13935 specifies methods for the determination of seam maximum force of sewn seams when the force is applied perpendicularly to the seam. This part of ISO 13935 describes the m
31、ethod known as the grab test.NOTE ISO 13935-1 describes the method known as the strip test. For informative references see the Bibliography.The method is mainly applicable to woven textile fabrics, including fabrics which exhibit stretch characteristics imparted by the presence of an elastomeric fib
32、re, mechanical or chemical treatment. It may be applicable to fabrics produced by other techniques. It is normally not applicable to geotextiles, nonwovens, coated fabrics, textile-glass woven fabrics and fabrics made from carbon fibres or polyolefin tape yarns (see Bibliography).The sewn fabrics ma
33、y be obtained from previously sewn articles or may be prepared from fabric samples, as agreed by the parties interested in the results.This method is applicable to straight seams only and not to curved seams.The method is restricted to the use of constant rate of extension (CRE) testing machines.2 N
34、ormative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendment
35、s) applies.ISO 139, Textiles Standard atmospheres for conditioning and testingISO 7500-1, Metallic materials Verification of static uniaxial testing machines Part 1: Tension/compression testing machines Verification and calibration of the force-measuring systemISO 10012, Measurement management syste
36、ms Requirements for measurement processes and measuring equipment3 Terms and definitionsFor the purposes of this document, the following terms and definitions apply.3.1constant-rate-of-extension (CRE) testing machinetensile-testing machine provided with one clamp which is stationary and another clam
37、p which moves with a constant speed throughout the test, the entire testing system being virtually free from deflectionSOURCE: ISO 13934-1:2013INTERNATIONAL STANDARD ISO 13935-2:2014(E) ISO 2014 All rights reserved 1BS EN ISO 13935-2:2014ISO 13935-2:2014(E)3.2grab testtensile test in which only the
38、centre part of the test specimen is gripped in the jaws of the testing machineSOURCE: ISO 13934-2:20133.3maximum force to seam rupturemaximum force recorded when a test specimen with a seam perpendicular to the direction of extension is taken to seam rupture during a tensile test under the specified
39、 conditionsSOURCE: ISO 13935-1:20143.4gauge lengthdistance between the two effective clamping points of a testing deviceNote 1 to entry: The effective clamping points (or lines) of jaws can be checked by clamping a test specimen under defined pretension with carbon copy paper to produce a gripping p
40、atternon the test specimen and/or the jaw facesSOURCE: ISO 13934-1:20134 PrincipleA fabric test specimen having a seam in the middle is gripped in its centre part by jaws of specified dimensions and is extended perpendicularly to the seam at a constant rate until the seam ruptures. The maximum force
41、 to seam rupture is recorded.5 SamplingSelect samples either in accordance with the procedure laid down in the material specification for the fabric, or as agreed between the interested parties.If preparation of seams prior to testing is required, avoid test specimens from folded or creased areas, s
42、elvedges and areas not representative of the fabric.For seams obtained from previously sewn articles ensure that the test specimens contain seams in straight line only and are representative for the relevant seam type of the textile article. Record any details in the test report.6 Apparatus6.1 CRE m
43、achineMetrological confirmation system of the tensile-testing machine shall be in accordance with ISO 10012.The constant-rate-of-extension (CRE) machine shall have the general characteristics given in 6.1.1 to 6.1.6:6.1.1 The tensile-testing machine shall be provided with means for indicating or rec
44、ording the force applied to the test specimen in stretching it to rupture. Under conditions of use, the accuracy of the apparatus shall be class 1 of 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 %.6.1.2 If
45、a class 2 tensile testing machine according to ISO 7500-1 is to be used, this shall be stated in the test report.6.1.3 If recording of force is obtained by means of data acquisition boards and software, the frequency of data collection shall be at least eight per second.2 ISO 2014 All rights reserve
46、dBS EN ISO 13935-2:2014ISO 13935-2:2014(E)6.1.4 The machine shall be capable of a constant rate of extension of 50 mm/min, with an accuracy of 10 %.6.1.5 The machine shall be capable of setting the gauge length to (100 1) mm.6.1.6 The clamping device of the machine shall be positioned with the centr
47、al point of the two jaws in the line of applied force, the front edges shall be at right angles to the line of applied force and their clamping faces shall be in the same plane.The jaws shall be capable of holding the test specimen without allowing it to slip and designed so that they do not cut or
48、otherwise weaken the test specimen.The faces of the jaws shall be smooth and flat, except that when, even with packing, the test specimen cannot be held satisfactorily with flat-faced jaws, engraved or corrugated jaws can be used to prevent slippage. Other auxiliary materials for use with either smo
49、oth or corrugated jaws to improve specimen gripping include paper, leather, plastics or rubber.For the grab test, the dimensional clamping area of the fabric shall be (25 mm 1 mm) x (25 mm 1 mm). This area can be achieved by either the method given in a) or b) and illustrated in Annex A.a) One clamp (25 mm) x (40 mm min., preferably 50 mm), positioned with the wider direction of the clamp perpendicular to the line of application of the force; a second clamp of the same dimensions positioned perpendicular to the fir
