1、May 2017 English price group 11No 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!%eBs“2663180www.din.deDIN
2、EN ISO 17233Leather Physical and mechanical tests Determination of cold crack temperature of surface coatings (ISO 17233:2017);English version EN ISO 17233:2017,English translation of DIN EN ISO 17233:2017-05Leder Physikalische und mechanische Prfungen Bestimmung der Kltebruchtemperatur von Oberflch
3、endeckschichten (ISO 17233:2017);Englische Fassung EN ISO 17233:2017,Englische bersetzung von DIN EN ISO 17233:2017-05Cuir Essais physiques et mcaniques Dtermination de la temprature de fissuration froid des revtements de surface (ISO 17233:2017);Version anglaise EN ISO 17233:2017,Traduction anglais
4、e de DIN EN ISO 17233:2017-05SupersedesDIN EN ISO 17233:200310www.beuth.deDocument comprises 17 pagesDTranslation by DIN-Sprachendienst.In case of doubt, the German-language original shall be considered authoritative.05.17 DIN EN ISO 17233:2017-05 2 A comma is used as the decimal marker. National fo
5、reword This document (EN ISO 17233:2017) has been prepared by Technical Committee IULTCS “International Union of Leather Technologists and Chemists Societies” in collaboration with Technical Committee CEN/TC 289 “Leather” (Secretariat: UNI, Italy). The responsible German body involved in its prepara
6、tion was DIN-Normenausschuss Materialprfung (DIN Standards Committee Materials Testing), Working Committee 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
7、 follows: ISO 2418 DIN EN ISO 2418 ISO 2419 DIN EN ISO 2419 Amendments This standard differs from DIN EN ISO 17233:2003-10 as follows: a) Clause 3 “Terms and definitions” has been included and therefore, all subsequent clauses have been renumbered; b) in 4.1 (now 5.1), the description of the cooled
8、chamber has been extended; c) in the German version of 4.4 (now 5.4), Schneidwerkzeug has been deleted and replaced by Stanzmesser; in the English version, “press knife” is used; d) in 5.3, the hinged sample holders have been rendered more precise; e) in 5.2 (now 6.2), the sampling has been revised;
9、 f) Clause 6 “Procedure” (now Clause 7) has been completely revised; g) Clause 7 “Test report” (now Clause 8) has been adapted to the modifications; h) the number of test pieces at each test temperature has been extended to six and several modifications have been made correspondingly; i) in addition
10、 to fixing the samples with screws, it is now also possible to fix them with adhesive tape. Previous editions DIN EN ISO 17233: 2003-10 DIN EN ISO 17233:2017-05 3 National Annex NA (informative) Bibliography DIN EN ISO 2418, Leather Chemical, physical and mechanical and fastness tests Sampling locat
11、ion DIN EN ISO 2419, Leather Physical and mechanical tests Sample preparation and conditioning DIN EN ISO 17233:2017-05 4 This page is intentionally blank EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 17233 February 2017 ICS 59.140.30 English Version Leather - Physical and mechanical test
12、s - Determination of cold crack temperature of surface coatings(ISO 17233:2017) Cuir - Essais physiques et mcaniques - Dtermination de la temprature de fissuration froid des revtements de surface (ISO 17233:2017) Leder - Physikalische und mechanische Prfungen - Bestimmung der Kltebruchtemperatur von
13、 Oberflchendeckschichten (ISO 17233:2017) This European Standard was approved by CEN on 5 January 2017. 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.
14、 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 by tr
15、anslation 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, Fin
16、land, 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 STAN
17、DARDIZATION 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 17233:2017 EEuropean foreword .31 S
18、cope . 52 Normative references 53 Terms and definitions . 54 Principle 55 Apparatus and materials 56 Sampling and sample preparation 67 Procedure. 78 Test report . 8Annex A (informative) Example for fixing test pieces with adhesive tape 9Contents PageDIN EN ISO 17233:2017-05 EN ISO 17233:2017 (E) 2F
19、oreword .4European foreword This document (EN ISO 17233:2017) 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 St
20、andard 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 the elements of
21、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. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European S
22、tandard: 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, S
23、lovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 17233:2017 has been approved by CEN as EN ISO 17233:2017 without any modification. DIN EN ISO 17233:2017-05 EN ISO 17233:2017 (E)3 ForewordISO (the International Organization for Standardization) i
24、s 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 represe
25、nted 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 develop
26、 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 ISO/IE
27、C 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 during t
28、he 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 meani
29、ng 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 17233 was prepared by the Phy
30、sical 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 the A
31、greement on technical cooperation between ISO and CEN (Vienna Agreement).It is based on IUP 29 originally published in J. Soc. Leather Tech. Chem., 69, p. 85, (1985) and declared an official method of the IULTCS in 1987. This updated version was published in J. Soc. Leather Tech. Chem., 84, p. 369,
32、(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 leather societies to further the advancement of leat
33、her 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.This second edition cancels and
34、 replaces the first edition (ISO 17233:2002), which has been technically revised with the following changes: the cooled chamber (5.1) and the hinged sample holder (5.3) have been specified more precisely; the number of test pieces has been changed to six for each temperature tested and a number of a
35、ssociated changes has been made; in addition to the fixing of samples with screws, it is now also possible to fix the samples with adhesive tape.DIN EN ISO 17233:2017-05 EN ISO 17233:2017 (E) 4 1 ScopeThis document specifies a method for determining the cold crack temperature of surface coatings app
36、lied to leather. It is applicable to all leathers which have a surface coating and which can be easily flexed.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, onl
37、y 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 and conditi
38、oningEN 15987, Leather Terminology Key definitions for the leather trade3 Terms and definitionsFor the purposes 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: a
39、vailable at h t t p :/ www .electropedia .org/ ISO Online browsing platform: available at h t t p :/ www .iso .org/ obp4 PrincipleA strip of leather is held in a hinged apparatus in a cooled chamber at a given temperature. The hinged apparatus is closed rapidly causing the leather to be folded with
40、the surface coating outwards. The leather is examined to determine if the surface coating has cracked.5 Apparatus and materials5.1 Cooled chamber, minimum internal height 500 mm and minimum internal width and depth 300 mm, fitted with a rack or other support and capable of maintaining temperatures b
41、etween +5 C and 30 C and of controlling the temperature to 2 C at any temperature within the range. The design of the chamber shall allow free circulation of air around the test piece and holder.The cooled chamber should have the door on the top. If a cooled chamber with the door on the front is use
42、d, the chamber or sample holder (5.3) shall incorporate a mechanism to enable the sample holder (5.3) to be snapped shut without opening the front door.5.2 Temperature measuring device, readable to 1 C and operating between at least +5 C and 30 C.DIN EN ISO 17233:2017-05 EN ISO 17233:2017 (E)5 5.3 H
43、inged sample holder, of the type and dimensions shown in Figure 1 and capable of holding at least six test pieces without them touching each other. All fixings on the inside shall be flush with the inner surface so as not to present any obstruction when the sample holder is closed.Sample holder for
44、fixing the test pieces with an adhesive tape shall have suitable marks (auxiliary lines) for positioning the test pieces (see Figure 1 and Annex A).Dimensions in millimetresKey1 hinge2 securing nut3 countersunk bolt4 line parallel to the hinge for positioning of test pieces (for method with adhesive
45、 tape only)5 auxiliary line for positioning of test pieces (for method with adhesive tape only)Figure 1 Hinged sample holder shown prior to snapping shut5.4 Press knife, conforming to ISO 2419, capable of punching a rectangular test piece (90 1) mm (10 1) mm.5.5 Magnifier, with a magnification of 4
46、to 6 times.5.6 Adhesive tape, suitable to fix leather down to 30 C.6 Sampling and sample preparation6.1 Sample in accordance with ISO 2418.6.2 Cut test pieces by applying the press knife (5.4) to the coated surface. For each temperature to be tested, cut six test pieces from each sample, three with
47、the long edge of the press knife parallel to, and DIN EN ISO 17233:2017-05 EN ISO 17233:2017 (E) 6 three perpendicular to, the backbone. If the direction of the backbone is not known, then cut the two sets of three samples at right angles to each other.If there is a requirement for more than two hid
48、es or skins to be tested in one batch, then only one test piece in each direction needs to be taken from each hide or skin, provided that the overall total is not less than three test pieces in each direction.6.3 Cut a circular hole of diameter (5,0 0,5) mm, with the centre of the hole (6,0 0,5) mm from each end of the test piece (see 6.2).NOTE It is not necessary to cut holes in the test pieces if test pi
