1、BS EN ISO 23910:2017Leather Physical andmechanical tests Measurement of stitch tearresistance (ISO 23910:2017)BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06BS EN ISO 23910:2017 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN IS
2、O 23910:2017. It supersedes BS EN ISO 23910:2007 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee TCI/69, Footwear, leather and coated fabrics.A list of organizations represented on this committee can beobtained on request to its secretary.This publicati
3、on does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2017. Published by BSI Standards Limited 2017ISBN 978 0 580 86624 1ICS 59.140.30Compliance with a British Standard cannot confer immunity from
4、legal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 28 February 2017.Amendments/corrigenda issued since publicationDate Text affectedEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 23910 February 2017 ICS 59.140.30 Super
5、sedes EN ISO 23910:2007English Version Leather - Physical and mechanical tests - Measurement of stitch tear resistance (ISO 23910:2017) Cuir - Essais physiques et mcaniques - Mesurage de la rsistance larrachement au point de couture (ISO 23910:2017) Leder - Physikalische und mechanische Prfungen - M
6、essung der Stichausreikraft (ISO 23910:2017) This European Standard was approved by CEN on 21 December 2016. 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 altera
7、tion. Up-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
8、by translation 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
9、, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR
10、 STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2017 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 23910:2017 EBS EN ISO 23910:20
11、17EN ISO 23910:2017 (E) 3 European foreword This document (EN ISO 23910:2017) has been prepared by Technical Committee IULTCS “International Union of Leather Technologists and Chemists Societies“ in collaboration with Technical Committee CEN/TC 289 “Leather” the secretariat of which is held by UNI.
12、This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by August 2017 and conflicting national standards shall be withdrawn at the latest by August 2017. Attention is drawn to the possibility that some of t
13、he elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN ISO 23910:2007. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
14、 following countries are bound to implement this 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, Netherla
15、nds, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 23910:2017 has been approved by CEN as EN ISO 23910:2017 without any modification. BS EN ISO 23910:2017ISO 23910:2017(E)IULTCS/IUP 44:2017
16、(E)Foreword iv1 Scope . 12 Normative references 13 Terms and definitions . 14 Principle 15 Apparatus . 16 Sampling and sample preparation 37 Procedure. 38 Test report . 4 ISO 2017 All rights reserved iiiContents PageBS EN ISO 23910:2017ISO 23910:2017(E)ForewordISO (the International Organization for
17、 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 technical committee has been established has the
18、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 electrotechnical standardization.The procedu
19、res 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 was drafted in accordance with the editorial
20、rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).Attention 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 rights. Details of any patent rights
21、identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www .iso .org/ patents).Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement.For an expla
22、nation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following URL: www .iso .org/ iso/ foreword .html.ISO 23910 was
23、prepared by the Physical Test Commission of the International Union of Leather Technologists and Chemists Societies (IUP Commission, IULTCS), in collaboration with the European Committee for Standardization (CEN) Technical Committee CEN/TC 289, Leather, the secretariat of which is held by UNI, in ac
24、cordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement).It is based on IUP 44 originally published in J. Soc. Leather Trades Chemists, 84, p. 409, (2000) and declared an official method of the IULTCS in 2001.IULTCS, originally formed in 1897, is a world-wide organ
25、ization of professional leather societies to further the advancement of leather science and technology. IULTCS has three Commissions, which are responsible for establishing international methods for the sampling and testing of leather. ISO recognizes IULTCS as an international standardizing body for
26、 the preparation of test methods for leather.This second edition cancels and replaces the first edition (ISO 23910:2007), which has been technically revised with the following changes: Figure 1 to Figure 3 have been modified.IULTCS/IUP 44:2017(E)iv ISO 2017 All rights reservedBS EN ISO 23910:2017INT
27、ERNATIONAL STANDARDISO 23910:2017(E)IULTCS/IUP 44:2017(E)Leather Physical and mechanical tests Measurement of stitch tear resistance1 ScopeThis document specifies a method for determining the stitch tear resistance of leather. It can be used on all leathers but is particularly suitable for leathers
28、over 1,2 mm in thickness.2 Normative referencesThe following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the refere
29、nced document (including any amendments) applies.ISO 2418, Leather Chemical, physical and mechanical and fastness tests Sampling locationISO 2419, Leather Physical and mechanical tests Sample preparation and conditioningISO 2589, Leather Physical and mechanical tests Determination of thicknessISO 75
30、00-1:2015, Metallic materials Calibration and verification of static uniaxial testing machines Part 1: Tension/compression testing machines Calibration and verification of the force-measuring systemEN 15987, Leather Terminology Key definitions for the leather trade3 Terms and definitionsFor the purp
31、oses of this document, the terms and definitions given in EN 15987 apply.ISO and IEC maintain terminological databases for use in standardization at the following addresses: IEC Electropedia: available at h t t p :/ www .electropedia .org/ ISO Online browsing platform: available at h t t p :/ www .i
32、so .org/ obp4 PrincipleA leather test piece is pulled against a mandrel of specified shape and dimensions inserted through a slit in the leather and the force required to tear the leather is recorded.5 Apparatus5.1 Tensile testing machine, with: a force range appropriate to the specimen under test;
33、a means of recording the force as specified by ISO 7500-1:2015, Class 2; a uniform speed of separation of the jaws of (100 20) mm/min; jaws, minimum length 25 mm in the direction of the applied load, designed to apply constant clamping by mechanical or pneumatic means. The texture and design of the
34、inside faces of the jaws shall be such that at the maximum load attained in the test, the specimen does not slip at either jaw. ISO 2017 All rights reserved 1BS EN ISO 23910:2017ISO 23910:2017(E)5.1.1 Metal test piece holder, of the shape shown in Figure 1.NOTE Figure 1 shows the test piece holder w
35、ith the mandrel (5.1.2) in place.5.1.2 Metal mandrel, of the shape and dimensions shown in Figure 2.5.2 Thickness gauge, as specified in ISO 2589.5.3 Press knife, conforming to the requirements of ISO 2419, the inner wall of which is a rectangle (20 1) mm (50 1) mm and incorporates a further cutting
36、 edge, the inner wall of which will cut a slit in the test piece as shown in Figure 3 in one operation. All parts of the press knife shall lie in the same plane.Key1 mandreld separation of arms of test piece holder, approximately 5 mm to 7 mmFigure 1 Metal test piece holder shown with mandrel in pla
37、ceDimensions in millimetresFigure 2 Metal mandrelIULTCS/IUP 44:2017(E)2 ISO 2017 All rights reservedBS EN ISO 23910:2017ISO 23910:2017(E)Dimensions in millimetresKey1 thickness measurement positionNOTE The dimensions associated with the slit are those of the press knife (5.3).Figure 3 Test piece6 Sa
38、mpling and sample preparation6.1 After conditioning in accordance with ISO 2419, sample in accordance with ISO 2418. Cut six test pieces by applying the press knife (5.3) to the grain surface. Cut three test pieces with the longer edge parallel to the backbone and three with the longer edge perpendi
39、cular to the backbone. The slit shall be cut with the press knife. A subsequent cut with a knife or a similar tool is not permitted.If there is a requirement for more than two hides or skins to be tested in one batch, then only one sample in each direction needs to be taken from each hide or skin, p
40、rovided that the overall total is not less than three test pieces in each direction.6.2 Condition the test pieces in accordance with ISO 2419.7 Procedure7.1 Measure the thickness of the test piece in accordance with ISO 2589 at a single point on each of the test pieces. This measurement should be ta
41、ken at a point approximately 10 mm from the cut end of the slit (see Figure 3).7.2 Grip the upper end of the metal test piece holder (5.1.1) in the upper jaw of the tensile testing machine.IULTCS/IUP 44:2017(E) ISO 2017 All rights reserved 3BS EN ISO 23910:2017ISO 23910:2017(E)7.3 Place the perforat
42、ed end of the test piece between the arms of the test piece holder and pass the mandrel (5.1.2) through both the holes in the test piece holder and the slit in the test piece.7.4 Clamp the free end of the test piece in the lower jaw of the tensile testing machine.7.5 Run the tensile test machine unt
43、il the test piece is torn apart and record the maximum force, in newtons, recorded during the tearing.7.6 Repeat 7.1 to 7.5 for other test pieces.8 Test reportThe test report shall include the following:a) a reference to this document, i.e. ISO 23910:2017;b) the thickness of the leather, in millimet
44、res;c) the mean tear load in newtons (N) to the nearest 0,1 N for test pieces with the longer edge cut parallel to the backbone;d) the mean tear load in newtons (N) to the nearest 0,1 N for the test pieces with the longer edge perpendicular to the backbone;e) the average tear load to the nearest 0,1
45、 N i.e. the arithmetic mean of c) and d), if required by customer or in specifications;f) the standard atmosphere used for conditioning and testing as given in ISO 2419;g) any deviations from the method specified in this document;h) full details for identification of the sample and any deviation fro
46、m ISO 2418 with respect to sampling.IULTCS/IUP 44:2017(E)4 ISO 2017 All rights reservedBS EN ISO 23910:2017This page deliberately left blankThis page deliberately left blankBSI is the national body responsible for preparing British Standards and other standards-related publications, information and
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