1、December 2015 English price group 8No 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!%Jp“2399677www.din.deD
2、IN EN ISO 5402-2Leather Determination of flex resistance Part 2: Vamp flex method (ISO 5402-2:2015);English version EN ISO 5402-2:2015,English translation of DIN EN ISO 5402-2:2015-12Leder Bestimmung der Dauerbiegefestigkeit Teil 2: Blattbiege-Verfahren (ISO 5402-2:2015);Englische Fassung EN ISO 540
3、2-2:2015,Englische bersetzung von DIN EN ISO 5402-2:2015-12Cuir Dtermination de la rsistance la flexion Partie 2: Mthode de flexion dempeigne (ISO 5402-2:2015);Version anglaise EN ISO 5402-2:2015,Traduction anglaise de DIN EN ISO 5402-2:2015-12SupersedesDIN EN ISO 22288:2009-04www.beuth.deDocument c
4、omprises 12 pagesDTranslation by DIN-Sprachendienst.In case of doubt, the German-language original shall be considered authoritative.01.16DIN EN ISO 5402-2:2015-12 2 A comma is used as the decimal marker. National foreword This document (EN ISO 5402-2:2015) has been prepared by Technical Committee C
5、EN/TC 289 “Leather” (Secretariat: UNI, Italy) in collaboration with the International Union of Leather Technologists and Chemists Societies (IULTCS). The responsible German body involved in its preparation was DIN-Normenausschuss Materialprfung (DIN Standards Committee Materials Testing), Working Co
6、mmittee NA 062-05-51 AA Anforderungen und physikalische Prfverfahren fr Leder und seine Ausgangsprodukte. DIN EN ISO 5402 consists of the following parts, under the general title Leather Determination of flex resistance: Part 1: Flexometer method Part 2: Vamp flex method The DIN Standards correspond
7、ing to the International Standards referred to in this document are as follows: ISO 2418 DIN EN ISO 2418 ISO 2419 DIN EN ISO 2419 ISO 3696 DIN ISO 3696 Amendments This standard differs from DIN EN ISO 22288:2009-04 as follows: a) the title has been changed; b) Clause 4 “Apparatus” has been revised;
8、c) the document has been adopted with a new standard number. Previous editions DIN EN 13335: 2002-06 DIN EN ISO 22288: 2009-04 National Annex NA (informative) Bibliography DIN EN ISO 2418, Leather Chemical, physical and mechanical and fastness tests Sampling location DIN EN ISO 2419, Leather Physica
9、l and mechanical tests Sample preparation and conditioning DIN ISO 3696, Water for analytical laboratory use Specification and test methods EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 5402-2 October 2015 ICS 59.140.30 Supersedes EN ISO 22288:2009English Version Leather - Determination o
10、f flex resistance - Part 2: Vamp flex method (ISO 5402-2:2015) Cuir - Dtermination de la rsistance la flexion - Partie 2: Mthode de flexion dempeigne Leder - Bestimmung der Dauerbiegefestigkeit - Teil 2: Blattbiege-Verfahren (ISO 5402-2:2015) This European Standard was approved by CEN on 8 August 20
11、15. 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-to-date lists and bibliographical references concerning such national standards may be obtained
12、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 translation under the responsibility of a CEN member into its own language and notified to the CEN-CEN
13、ELEC 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Ita
14、ly, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey andUnited Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Aven
15、ue Marnix 17, B-1000 Brussels 2015 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 5402-2:2015 E(ISO 5402-2:2015) Foreword .1 Scope .2 Normative references 3 Principle 4 Apparatus .5 Sampling and sample preparation 6 Procedure.
16、7 Test report .Annex A (informative) Sources of apparatus Contents PageEuropean foreword. . 3 2DIN EN ISO 5402-2:2015-12 EN ISO 5402-2:2015 (E) 4555588910European foreword This document (EN ISO 5402-2:2015) has been prepared by Technical Committee CEN/TC 289 “Leather”, the secretariat of which is he
17、ld by UNI, in collaboration with IULTCS International Union of Leather Technologists and Chemists Societies”. 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 April 2016, and conflicting national s
18、tandards shall be withdrawn at the latest by April 2016. Attention 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 I
19、SO 22288:2009. According to the CEN-CENELEC Internal Regulations, 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 Macedon
20、ia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 5402-2:2015 has been approved by CEN
21、as EN ISO 5402-2:2015 without any modification. “EN ISO 5402-2:2015 (E) DIN EN ISO 5402-2:2015-12 3 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 c
22、arried 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 represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the wor
23、k. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all 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 diffe
24、rent 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 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
25、 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 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/patent
26、s). 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 meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the WTO principle
27、s in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary informationISO 5402-2, formerly ISO 22288, was prepared by the Physical Test Commission of the International Union of Leather Technologists and Chemists Societies (IUP Commission, IULTCS) in collaboration with
28、 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 cooperation between ISO and CEN (Vienna Agreement). It was published as EN 13335.It is based on IUP 39 published in J. Soc
29、. Leather Tech. Chem., 84 (7), p. 381, 2000, and declared an official method of the IULTCS in March 2001. The title was changed, Clause 4 revised in 2013, and the standard re-numbered as ISO 5402-2.IULTCS, originally formed in 1897, is a world-wide organization of professional leather societies to f
30、urther 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 methods for leather.T
31、his first edition cancels and replaces ISO 22288:2006 which has been technically revised.ISO 5402 consists of the following parts, under the general title Leather Determination of flex resistance: Part 1: Flexometer method Part 2: Vamp flex methodEN ISO 5402-2:2015 (E) DIN EN ISO 5402-2:2015-12 4 1
32、ScopeThis part of ISO 5402 specifies a method for determining the wet or dry flex resistance of leather and finishes applied to leather. It is applicable to all types of leather below 3,0 mm in thickness.2 Normative referencesThe following documents, in whole or in part, are normatively referenced i
33、n 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 amendments) applies.ISO 2418, Leather Chemical, physical and mechanical and fastness tests Sampling lo
34、cationISO 2419, Leather Physical and mechanical tests Sample preparation and conditioningISO 3696, Water for analytical laboratory use Specification and test methods3 PrincipleA test piece is folded with the surface to be tested outwards over two inverted “V” shaped clamps. Relative movement of the
35、clamps flexes the sample producing one downward crease surrounded by four upward creases. The test piece is examined periodically for damage.4 Apparatus4.1 Test machine, incorporating the following.4.1.1 Two inverted “V” shaped clamps (Figures 1 and 2), aligned parallel to one another, centred on th
36、e same axis and with a minimum separation between the clamps of (9,5 1,0) mm.Each clamp shall have two parts.4.1.1.1 An outer part comprising a “V” form with an internal angle of (40 1) and a truncated tip radius of (6,4 0,5) mm.4.1.1.2 An inner part having the shape and size that shall complement t
37、he outer part.4.1.2 A means of applying a simple harmonic reciprocating motion between the two clamps, to move them apart by (19,0 1,5) mm and return them to the minimum separation (4.1.1) at a rate of oscillation of (300 30) cycles/min.4.1.3 Counter, to indicate the number of complete cycles.EN ISO
38、 5402-2:2015 (E) DIN EN ISO 5402-2:2015-12 5 Key1 clamp, outer part2 clamp, inner partA internal angle, (40 1)B radius, (6,4 0,5) mmFigure 1 Inverted “V” shaped clampEN ISO 5402-2:2015 (E) DIN EN ISO 5402-2:2015-12 6 a) Plan view Crease pattern formed by flexingb) Side view Crease pattern in example
39、 test pieceKey1 inverted “V” shaped clamps2 test piece3 folds with surface to be tested inwards4 folds with surface to be tested outwards5 oscillation (9,5 mm to 19,0 mm)Figure 2 Crease patternsEN ISO 5402-2:2015 (E) DIN EN ISO 5402-2:2015-12 7 4.2 Press knife, conforming to the requirements of ISO
40、2419, the inner wall of which is a square of side 64 mm 1 mm.4.3 Magnifier, with a magnification of four to six times.4.4 Distilled or deionized water, conforming to the requirements of grade 3 of ISO 3696.5 Sampling and sample preparation5.1 Sample in accordance with ISO 2418. Cut four test pieces
41、parallel to the backbone and four test pieces perpendicular to the backbone by applying the press knife (4.2) to the surface to be tested. Use two test pieces parallel to and two test pieces perpendicular to the backbone for dry tests and two test pieces parallel to and two test pieces perpendicular
42、 to the backbone for wet tests.If there is a requirement for more than two hides or skins to be tested in one batch, then only two samples in each direction need be taken from each hide or skin, giving one sample in each direction for both dry and wet, provided that the overall total is not less tha
43、n four test pieces in each direction.5.2 For dry flex testing, condition the test pieces in accordance with ISO 2419 and perform the test in the conditioned atmosphere.5.3 For wet flex testing, the test pieces can be wetted by rubbing approximately 1 ml of distilled or deionized water into the flesh
44、 surface of the leather. The wetting should be repeated every 25,000 flexes during the test. Carry out wet flexing without delay.6 Procedure6.1 Remove the upper parts of the clamps (4.1.1) and adjust the test machine so that the clamps are at their maximum separation.6.2 Fold the test piece evenly o
45、ver the “V” shaped clamps with the surface to be tested uppermost and hold in place by replacing the upper parts of the clamps, ensuring that there is no slack in the test piece. Position two test pieces so that the direction of the backbone is along the axis of movement of the clamps and two so tha
46、t it is perpendicular to the axis.6.3 Slowly move the clamps together and observe the test pieces to ensure that the centre of each test piece folds downwards (Figure 2). If this is not the case, apply gentle pressure to the centre of the ridge as the clamps move together to make a downward fold for
47、m.6.4 Run the machine for the required number of flex cycles selected from the following list: Dry flex: 50 000; 100 000; 250 000; 500 000; 1 000 000 cycles; Wet flex: 50 000; 100 000 cycles.In addition to the above inspection points, remove the wet test pieces from the machine every 25 000 cycles a
48、nd examine them for spue before re-wetting and replacing in the test machine.NOTE Other inspection points are considered if required.6.5 Stop the test machine and remove the test piece. Examine visually in good light using the naked eye and with the magnifier (4.3). Examine the test piece with it both lying flat and folded. Record any damage EN ISO 5402-2:2015 (E) DIN EN ISO 5402-2:2015-12 8
