1、May 2017 English price group 9No 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!%eBk“2663172www.din.deDIN E
2、N ISO 5402-1Leather Determination of flex resistance Part 1: Flexometer method (ISO 54021:2017);English version EN ISO 54021:2017,English translation of DIN EN ISO 5402-1:2017-05Leder Bestimmung der Dauerbiegefestigkeit Teil 1: FlexometerVerfahren (ISO 54021:2017);Englische Fassung EN ISO 54021:2017
3、,Englische bersetzung von DIN EN ISO 5402-1:2017-05Cuir Dtermination de la rsistance la flexion Partie 1: Mthode au flexomtre (ISO 54021:2017);Version anglaise EN ISO 54021:2017,Traduction anglaise de DIN EN ISO 5402-1:2017-05SupersedesDIN EN ISO 54021:201203www.beuth.deDocument comprises 12 pagesDT
4、ranslation by DIN-Sprachendienst.In case of doubt, the German-language original shall be considered authoritative.05.17 DIN EN ISO 5402-1:2017-05 2 A comma is used as the decimal marker. National foreword This document (EN ISO 5402-1:2017) has been prepared by Technical Committee IULTCS “Internation
5、al 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 was DIN-Normenausschuss Materialprfung (DIN Standards Committee Materials Testing), Working Comm
6、ittee NA 062-05-51 AA “Requirements and physical test methods of leather and its starting products”. The DIN Standards corresponding 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 DIN EN ISO 5402 con
7、sists of the following parts, under the general title Leather Determination of flex resistance: Part 1: Flexometer method Part 2: Vamp flex method Amendments This standard differs from DIN EN ISO 5402-1:2012-03 as follows: a) Clause 3 “Terms and definitions” has been included; b) 5.1, 5.1.1, 5.1.2 a
8、nd 7.2 to 7.6 have been technically revised and renumbered; c) the standard has been editorially revised. Previous editions DIN 53351: 1983-01 DIN EN ISO 5402: 2003-10 DIN EN ISO 5402-1: 2012-03 National Annex NA (informative) Bibliography DIN EN ISO 2418, Leather Chemical, physical and mechanical a
9、nd fastness tests Sampling location DIN EN ISO 2419, Leather Physical 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 5402-1 February 2017 ICS 59.140.30
10、Supersedes EN ISO 5402-1:2011English Version Leather - Determination of flex resistance - Part 1: Flexometer method (ISO 5402-1:2017) Cuir - Dtermination de la rsistance la flexion - Partie 1: Mthode au flexomtre (ISO 5402-1:2017) Leder - Bestimmung der Dauerbiegefestigkeit - Teil 1: Flexometer-Verf
11、ahren (ISO 5402-1:2017) 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 alteration. Up-to-date list
12、s 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 translation under
13、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, Former Yug
14、oslav 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 STANDARDIZATION COMI
15、T 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 5402-1:2017 EEuropean foreword .31 Scope . 52 Norma
16、tive references 53 Terms and definitions . 54 Principle 55 Apparatus and reagents 56 Sampling and sample preparation 77 Procedure. 78 Test report . 9Annex A (informative) Sources of apparatus 10Contents PageDIN EN ISO 5402-1:2017-05 EN ISO 5402-1:2017 (E)2Foreword .4European foreword This document (
17、EN ISO 5402-1:2017) 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. This European Standard shall be given the status of a nati
18、onal 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 the elements of this document may be the subject of patent
19、rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN ISO 5402-1:2011. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European
20、 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, Serbia, Slovakia,
21、 Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 5402-1:2017 has been approved by CEN as EN ISO 5402-1:2017 without any modification. DIN EN ISO 5402-1:2017-05 EN ISO 5402-1:2017 (E)3 ForewordISO (the International Organization for Standardizat
22、ion) 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 r
23、epresented 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 d
24、evelop 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
25、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 du
26、ring 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
27、 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 5402-1 was prepared by
28、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 accordance with
29、 the Agreement on technical cooperation between ISO and CEN (Vienna Agreement).IULTCS, originally formed in 1897, is a world-wide organization of professional leather societies to further the advancement of leather science and technology. IULTCS has three Commissions, which are responsible for estab
30、lishing 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 edition (ISO 5402-1:2011), which has been technically revised.Subclau
31、ses 5.1, 5.1.1, 5.1.2, 7.2 to 7.6 have been technically revised.A list of all parts in the ISO 5402 series can be found on the ISO website.DIN EN ISO 5402-1:2017-05 EN ISO 5402-1:2017 (E)4 1 ScopeThis document specifies a method for determining the wet or dry flex resistance of leather and finishes
32、applied to leather. It is applicable to all types of flexible leather below 3,0 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
33、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 and conditioningISO 3696,
34、 Water for analytical laboratory use Specification and test methods3 Terms and definitionsNo terms and definitions are listed in this document.ISO and IEC maintain terminological databases for use in standardization at the following addresses: IEC Electropedia: available at h t t p :/ www .electrope
35、dia .org/ ISO Online browsing platform: available at h t t p :/ www .iso .org/ obp4 PrincipleA test piece is folded with the surface to be tested inwards and clamped in an upper movable clamp and with the surface to be tested outwards in a lower fixed clamp. Movement of the upper clamp causes a fold
36、 in the test piece to run along it. The test piece is examined periodically for damage.5 Apparatus and reagents5.1 Test machine, consisting of a movable upper clamp, a fixed lower clamp and a counter as described in 5.1.1 to 5.1.3 and as shown in Figure 1 and Figure 2.5.1.1 Upper clamp, consisting o
37、f a pivoting pair of flat plates of 4 mm thickness as shown in Figure 1.The small plate (H) has the basic shape of a trapezium but with a radius of 2 mm at the acute corner. It has a ledge (G) to support the folded test piece. The larger plate (I) has a shape as shown in Figure 1. The clamp tighteni
38、ng screw (F) tightens the plates together and also acts as a stop to prevent the test piece from being incorrectly positioned. The design of the clamp should ensure that the two faces of the clamp remain parallel when clamping the test piece. The upper clamp is reciprocated by a motor about a horizo
39、ntal axle, descending through an angle (A) of (22,5 0,5) at a frequency of (100 5) cycles/min.DIN EN ISO 5402-1:2017-05 EN ISO 5402-1:2017 (E)5 5.1.2 Lower clamp, fixed and lying directly beneath (planar to) the upper clamp and consisting of a pair of flat plates (B and C) to hold the test piece.The
40、 position of the lower clamp is such that the vertical distance (D) between the upper side of the ledge (G) of the upper clamp and the upper edge of the fixed lower clamp, when the upper clamp is horizontal, is (25,0 0,5) mm.5.1.3 Counter, to indicate the number of cycles.Dimensions in millimetresKe
41、yA flexing angle (22,5 0,5)B fixed part of fixed lower clampC movable part of fixed lower clampD vertical positioning of fixed part of movable upper clamp and fixed part of fixed lower clampE horizontal axle (pivot point)F clamp tightening screwsG ledge (for testing of thick test pieces, the ledge c
42、an be increased to more than 8 mm)H small part of upper clamp with ledge (G)I large part of upper clampFigure 1 Upper (movable) and lower (fixed) clamp5.2 Press knife, conforming to the requirements of ISO 2419, the inner wall of which is a rectangle (70 1) mm (45 1) mm.DIN EN ISO 5402-1:2017-05 EN
43、ISO 5402-1:2017 (E)6 5.3 Magnifier, with a magnification of four to six times.5.4 Desiccator, or other vessel that can be evacuated.5.5 Vacuum pump, capable of reducing the pressure in the desiccator to less than 4 kPa.5.6 Distilled or deionized water, conforming to the requirements of grade 3 of IS
44、O 3696.5.7 Glass dishes, minimum diameter 100 mm and minimum depth 25 mm.5.8 Mandrel, diameter 10 mm and minimum length 70 mm.5.9 Metal clip, 70 mm wide, capable to fix a test piece bent around the mandrel (5.8) with slight stretch.5.10 Stereo microscope, with a magnification of 25 times.6 Sampling
45、and sample preparation6.1 Sample in accordance with ISO 2418. From the sample, cut a minimum of four pieces for dry test and/or four pieces for wet test by applying the press knife (5.2) to the surface to be tested. Cut a minimum of two test pieces with the long edge parallel to the backbone and two
46、 with the long edge 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 or skin, provided that the overall total is not less than three pieces in each direction.6.2
47、 For dry flex testing, condition the test pieces in accordance with ISO 2419 and test in the conditioned atmosphere.6.3 For wet flex testing, place the test pieces in a glass dish (5.7), add sufficient distilled or deionized water (5.6) to give a minimum depth of 10 mm, put the dish in the desiccato
48、r and reduce the pressure to below 4 kPa for 2 min.Restore to normal atmospheric pressure and repeat the pressure reduction/restoration twice. Remove the test piece and remove excess water using blotting paper. Carry out wet flexing without delay.NOTE It is not possible to clamp thick leathers in the upper clamp. In such cases, the thickness of the test piece is reduced for a maximum length of 15 mm from one e
