1、July 2016 English price group 7No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 59.140.30!%Wk“2529872www.din.deDIN E
2、N ISO 3377-2Leather Physical and mechanical tests Determination of tear load Part 2: Double edge tear (ISO 3377-2:2016);English version EN ISO 3377-2:2016,English translation of DIN EN ISO 3377-2:2016-07Leder Physikalische und mechanische Prfungen Bestimmung der Weiterreifestigkeit Teil 2: Zweikante
3、nriss (ISO 3377-2:2016);Englische Fassung EN ISO 3377-2:2016,Englische bersetzung von DIN EN ISO 3377-2:2016-07Cuir Essais physiques et mcaniques Dtermination de la force de dchirement Partie 2: Dchirement des deux bords (ISO 3377-2:2016);Version anglaise EN ISO 3377-2:2016,Traduction anglaise de DI
4、N EN ISO 3377-2:2016-07SupersedesDIN EN ISO 3377-2:2003-10www.beuth.deDocument comprises 9 pagesDTranslation by DIN-Sprachendienst.In case of doubt, the German-language original shall be considered authoritative.06.16DIN EN ISO 3377-2:2016-07 2 A comma is used as the decimal marker. National forewor
5、d 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” (Secretariat: UNI, Italy). The responsible German body involved in its preparation
6、 was DIN-Normenausschuss Materialprfung (DIN Standards Committee Materials Testing), Working Committee NA 062-05-51 AA Anforderungen und physikalische Prfverfahren fr Leder und seine Ausgangsprodukte. The DIN Standards corresponding to the International Standards referred to in this document are as
7、follows: ISO 2418 DIN EN ISO 2418 ISO 2419 DIN EN ISO 2419 ISO 2589 DIN EN ISO 2589 ISO 7500-1 DIN EN ISO 7500-1 Amendments This standard differs from DIN EN ISO 3377-2:2003-10 as follows: a) in Clause 7 “Test report”, item f) has been aligned with ISO 2419; b) the standard has been editorially revi
8、sed. Previous editions DIN 53329: 1944-02, 1982-02 DIN EN ISO 3377-2: 2003-10 National Annex NA (informative) Bibliography DIN EN ISO 2418, Leather Chemical, physical and mechanical and fastness tests Sampling location DIN EN ISO 2419, Leather Physical and mechanical tests Sample preparation and con
9、ditioning DIN EN ISO 2589, Leather Physical and mechanical tests Determination of thickness DIN 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 EUROPEAN STANDARD
10、 NORME EUROPENNE EUROPISCHE NORM EN ISO 3377-2 March 2016 ICS 59.140.30 Supersedes EN ISO 3377-2:2002English Version Leather Physical 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 P
11、artie 2: Dchirement des deux bords (ISO 3377-2:2016) Leder Physikalische und mechanische Prfungen Bestimmung der Weiterreifestigkeit 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 R
12、egulations which stipulate the conditions for giving this European Standard the status of a national standard without 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 m
13、ember. This European Standard exists in three official versions (English, French, German). A version in any other language 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
14、. CEN members are the national standards bodies of 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, Pola
15、nd, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE 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
16、in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 3377-2:2016 EEN ISO 3377-2:2016 (E) 2 Contents Page European foreword . 3 Foreword 4 1 Scope 5 2 Normative references 5 3 Principle . 5 4 Apparatus . 5 5 Sampling and sample preparation 6 6 Procedure. 6 7 Test
17、report . 7 DIN EN ISO 3377-2:2016-07 EN 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
18、secretariat of which is held 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. Attentio
19、n is drawn to the possibility 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
20、, the national standards organizations 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, L
21、atvia, Lithuania, Luxembourg, 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. DIN EN ISO 3377-
22、2:2016-07 ForewordISO (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
23、which a technical 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 al
24、l matters of 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. Th
25、is document was drafted in accordance with the editorial 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
26、 all such patent rights. 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 (see www.iso.org/patents).Any trade name used in this document is information given for the convenience of users
27、and does not constitute 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
28、informationISO 3377-2 was 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 wh
29、ich is held by UNI, in accordance with the Agreement on technical cooperation 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 publish
30、ed in J. Soc. Leather Tech. Chem. 84, p. 327, (2000) and reconfirmed 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 leathe
31、r 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 the preparation of test metho
32、ds for leather.This second edition cancels and replaces the first edition (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
33、of tear load: Part 1: Single edge tear Part 2: Double edge tear4EN ISO 3377-2:2016 (E) DIN EN ISO 3377-2:2016-07 1 ScopeThis part of ISO 3377 specifies a method for determining the tear strength of leather using a double edged tear. The method is sometimes described as the Baumann tear. It is applic
34、able 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 references, only the edition cited applies. For undated references, the latest edition of the referenced d
35、ocument (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 7500-1,
36、Metallic materials Verification of static uniaxial testing machines Part 1: Tension/compression testing machines Verification and calibration of the force-measuring system3 PrincipleA rectangular test piece with a hole of specified shape is placed over the turned up ends of a pair of holders attache
37、d 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 specimen under test; a means of recording the force to an accuracy of at least 2 % as specified by Class 2
38、 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 0,1 mm thick, bent through a right angle at one end to form a rigid strip with a minimum length of 12 mm
39、 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 cutting a test piece as shown in Figure 2 in one operation. All parts of the press knife shall lie in the
40、same plane.5 EN ISO 3377-2:2016 (E) DIN EN ISO 3377-2:2016-07 Figure 1 Test piece holdersDimensions in millimetresKeyR radiusFigure 2 Test piece for double edge tear5 Sampling and sample preparation5.1 Sample in accordance with ISO 2418. From the sample, cut six test pieces in accordance with ISO 24
41、19, 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 than two hides or skins to be tested in one batch, then only one test piece in each direction need be taken from each hide
42、 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 of the test pieces in accordance with ISO 2589.6 Procedure6.1 Adjust the apparatus so that the turned up ends of the test
43、 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 parallel to the straight edges of the slot. Press the test piece firmly onto the holders.6EN ISO 3377-2:2016 (E) DIN EN ISO 3377
44、-2:2016-07 6.2 Run the tensile test machine until the test piece is torn apart and record the maximum force reached during tearing.6.3 Repeat 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 thi
45、ckness 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 mean 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
46、);f) the standard atmosphere used for conditioning and testing, as given in ISO 2419;g) any deviations from the method specified in this part of ISO 3377;h) full details for identification of the sample and any deviations from ISO 2418 with respect to sampling.7 EN ISO 3377-2:2016 (E) DIN EN ISO 3377-2:2016-07
