1、BSI Standards PublicationBS EN ISO 3377-2:2016Leather Physical andmechanical tests Determination of tear loadPart 2: Double edge tear (ISO 3377-2:2016)BS EN ISO 3377-2:2016 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO3377-2:2016. It supersedes BS EN ISO 3
2、377-2:2002 which iswithdrawn.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 publication does not purport to include all the
3、necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2016. Published by BSI StandardsLimited 2016ISBN 978 0 580 90472 1ICS 59.140.30Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard
4、was published under the authority of theStandards Policy and Strategy Committee on 31 March 2016.Amendments issued since publicationDate Text affectedEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 3377-2 March 2016 ICS 59.140.30 Supersedes EN ISO 3377-2:2002English Version Leather - Physic
5、al and mechanical tests - Determination of tear load - Part 2: Double edge tear (ISO 3377-2:2016) Cuir - Essais physiques et mcaniques - Dtermination de la force de dchirement - Partie 2: Dchirement des deux bords (ISO 3377-2:2016) Leder - Physikalische und mechanische Prfungen - Bestimmung der Weit
6、erreifestigkeit - Teil 2: Zweikantenriss (ISO 3377-2:2016) This European Standard was approved by CEN on 23 January 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 witho
7、ut any alteration. 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 l
8、anguage made 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, Den
9、mark, Estonia, Finland, 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 COMMITTE
10、E FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2016 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 3377-2:2016 EBS EN ISO 33
11、77-2:2016EN ISO 3377-2:2016 (E) 3 European foreword This document (EN ISO 3377-2:2016) 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 hel
12、d by UNI. 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 September 2016, and conflicting national standards shall be withdrawn at the latest by September 2016. Attention is drawn to the possibili
13、ty that some of the 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 3377-2:2002. According to the CEN-CENELEC Internal Regulations, the national standards or
14、ganizations of the 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, Luxembour
15、g, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 3377-2:2016 has been approved by CEN as EN ISO 3377-2:2016 without any modification. BS EN ISO 3377-2:2016ISO 3377-2:2016(E)IULT
16、CS/IUP 8:2016(E)Foreword iv1 Scope . 12 Normative references 13 Principle 14 Apparatus . 15 Sampling and sample preparation 26 Procedure. 27 Test report . 3 ISO 2016 All rights reserved iiiContents PageBS EN ISO 3377-2:2016ISO 3377-2:2016(E)ForewordISO (the International Organization for Standardiza
17、tion) 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 right to be
18、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 procedures used to
19、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 rules of the
20、 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 identified duri
21、ng 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 explanation on the mean
22、ing 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 informationISO 3377-2 was prepared by the Physical Test Commission of
23、 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 accordance with the Agreement on technical coo
24、peration between ISO and CEN (Vienna Agreement).It is based on IUP 8 originally published in J. Soc. Leather Trades Chemists 44, p. 368, (1960) and declared an official method of the IULTCS in 1961. This updated version was published in J. Soc. Leather Tech. Chem. 84, p. 327, (2000) and reconfirmed
25、as an official method in March 2001. The same principle is used but the text has been updated and includes the number of test pieces to be taken.IULTCS, originally formed in 1897, is a world-wide organization of professional leather societies to further the advancement of leather science and technol
26、ogy. 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 the preparation of test methods for leather.This second edition cancels and replaces the first edi
27、tion (ISO 3377-2:2002), of which it constitutes a minor revision to align item f) of Clause 7 with ISO 2419:2012.ISO 3377 consists of the following parts, under the general title Leather Physical and mechanical tests Determination of tear load: Part 1: Single edge tear Part 2: Double edge tearIULTCS
28、/IUP 8:2016(E)iv ISO 2016 All rights reservedBS EN ISO 3377-2:2016INTERNATIONAL STANDARDISO 3377-2:2016(E)IULTCS/IUP 8:2016(E)Leather Physical and mechanical tests Determination of tear load Part 2: Double edge tear1 ScopeThis part of ISO 3377 specifies a method for determining the tear strength of
29、leather using a double edged tear. The method is sometimes described as the Baumann tear. It is applicable to all types of leather.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated refe
30、rences, only the edition cited applies. For undated references, the latest edition of the referenced 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
31、and conditioningISO 2589, Leather Physical and mechanical tests Determination of thicknessISO 7500-1, Metallic materials Verification of static uniaxial testing machines Part 1: Tension/compression testing machines Verification and calibration of the force-measuring system3 PrincipleA rectangular te
32、st piece with a hole of specified shape is placed over the turned up ends of a pair of holders attached to the jaws of a tensile testing machine. The highest force exerted during tearing of the test piece is recorded.4 Apparatus4.1 Tensile testing machine, with: a force range appropriate to the spec
33、imen under test; a means of recording the force to an accuracy of at least 2 % as specified by Class 2 of ISO 7500-1; a uniform speed of separation of the jaws of 100 mm/min 20 mm/min.4.2 Test piece holders, such as shown in Figure 1, each consisting of a strip of steel 10 mm 0,1 mm wide and 2 mm 0,
34、1 mm thick, bent through a right angle at one end to form a rigid strip with a minimum length of 12 mm 0,1 mm. The holders either fit into or replace the jaws of the tensile testing machine (4.1).4.3 Thickness gauge, as specified in ISO 2589.4.4 Press knife, as specified in ISO 2419, capable of cutt
35、ing a test piece as shown in Figure 2 in one operation. All parts of the press knife shall lie in the same plane. ISO 2016 All rights reserved 1BS EN ISO 3377-2:2016ISO 3377-2:2016(E)Figure 1 Test piece holdersDimensions in millimetresKeyR radiusFigure 2 Test piece for double edge tear5 Sampling and
36、 sample preparation5.1 Sample in accordance with ISO 2418. From the sample, cut six test pieces in accordance with ISO 2419, three test pieces with the longer sides parallel to the backbone and three test pieces with the longer sides perpendicular to the backbone.If there is a requirement for more t
37、han two hides or skins to be tested in one batch, then only one test piece in each direction need be taken from each hide or skin, provided that the overall total is not less than three test pieces in each direction.5.2 Condition the test pieces in accordance with ISO 2419.5.3 Measure the thickness
38、of the test pieces in accordance with ISO 2589.6 Procedure6.1 Adjust the apparatus so that the turned up ends of the test piece holders are lightly touching each other. Slip the test piece over the turned up ends so that the ends protrude through the slot with the width of the turned up ends paralle
39、l to the straight edges of the slot. Press the test piece firmly onto the holders.IULTCS/IUP 8:2016(E)2 ISO 2016 All rights reservedBS EN ISO 3377-2:2016ISO 3377-2:2016(E)6.2 Run the tensile test machine until the test piece is torn apart and record the maximum force reached during tearing.6.3 Repea
40、t 6.1 and 6.2 for other test pieces.7 Test reportThe test report shall include the following:a) a reference to this part of ISO 3377, i.e. ISO 3377-2;b) the thickness of the leather in mm;c) the mean tear load in newtons (N) with the long edge of the test piece cut parallel to the backbone;d) the me
41、an tear load in newtons (N) with the long edge of the test piece cut perpendicular to the backbone;e) the average tear load i.e. the arithmetic mean of c) and d);f) the standard atmosphere used for conditioning and testing, as given in ISO 2419;g) any deviations from the method specified in this par
42、t of ISO 3377;h) full details for identification of the sample and any deviations from ISO 2418 with respect to sampling.IULTCS/IUP 8:2016(E) ISO 2016 All rights reserved 3This page deliberately left blankThis page deliberately left blankBSI is the national body responsible for preparing British Sta
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