1、BS EN ISO 17232:2017Leather Physical andmechanical tests Determination of heatresistance of patent leather(ISO 17232:2017)BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06BS EN ISO 17232:2017 BRITISH STANDARDNational forewordThis British Standard is the UK implementat
2、ion of EN ISO 17232:2017. It supersedes BS EN ISO 17232:2009 which iswithdrawn.The UK participation in its preparation was entrusted to Technical Committee TCI/69, Footwear, leather and coated fabrics.A list of organizations represented on this committee can be obtained on request to its secretary.T
3、his publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2017.Published by BSI Standards Limited 2017ISBN 978 0 580 86629 6 ICS 59.140.30 Compliance with a British Standard cannot conf
4、er immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 28 February 2017.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 17232 Febru
5、ary 2017 ICS 59.140.30 English Version Leather - Physical and mechanical tests - Determination of heat resistance of patent leather (ISO 17232:2017) Cuir - Essais physiques et mcaniques - Dtermination de la rsistance la chaleur des cuirs vernis (ISO 17232:2017) Leder - Physikalische und mechanische
6、Prfungen - Bestimmung der Wrmebestndigkeit von Lackleder (ISO 17232:2017) 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
7、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 member. This European Standard exists in three official versions (English, French, German). A version
8、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. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech
9、 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, Slovenia, Spain, Sweden, Switzerland, Turkey and United King
10、dom. EUROPEAN COMMITTEE FOR STANDARDIZATION 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 172
11、32:2017 EBS EN ISO 17232:2017EN ISO 17232:2017 (E) 3 European foreword This document (EN ISO 17232:2017) 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 secretaria
12、t 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 August 2017, and conflicting national standards shall be withdrawn at the latest by August 2017. Attention is drawn to th
13、e 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. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following count
14、ries 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, Luxembourg, Malta, Netherlands, Norway, Pol
15、and, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 17232:2017 has been approved by CEN as EN ISO 17232:2017 without any modification. BS EN ISO 17232:2017ISO 17232:2017(E)IULTCS/IUP 38:2017(E)Foreword iv1
16、Scope . 12 Normative references 13 Terms and definitions . 14 Method A Lastometer method . 14.1 Principle 14.2 Apparatus 14.3 Sampling and sample preparation . 24.4 Procedure 24.5 Test report . 35 Method B Zwik method. 35.1 Principle 35.2 Apparatus 35.3 Sampling and sample preparation . 55.4 Procedu
17、re 55.5 Test report . 5Annex A (informative) Sources of apparatus . 7 ISO 2017 All rights reserved iiiContents PageBS EN ISO 17232:2017ISO 17232:2017(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The wor
18、k 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 represented on that committee. International organizations, governmental and non-governme
19、ntal, 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 this document and those intended for its further maintenance are described in the
20、 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/IEC Directives, Part 2 (see www .iso .org/ directives).Attention is drawn to the pos
21、sibility 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 the development of the document will be in the Introduction and/or on the ISO list
22、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 meaning of ISO specific terms and expressions related to conformity assessment, as well
23、 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.IULTCS, originally formed in 1897, is a world-wide organization of professional leather societies to further the ad
24、vancement 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.ISO 17232 was
25、prepared by the European Committee for Standardization (CEN) Technical Committee CEN/TC 289, Leather, the secretariat of which is held by UNI, in collaboration with the Physical Test Commission of the International Union of Leather Technologists and Chemists Societies (IUP Commission, IULTCS), in ac
26、cordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement).It is based on IUP 38 published in J. Soc. Leather Tech. Chem., 84 (7), p. 403, (2000), and declared an official method of the IULTCS in March 2001.This second edition cancels and replaces the first edition (
27、ISO 17232:2006), which has been technically revised with the following changes: the test conditions in 4.4.4 have been clarified; a reference to specific standard conditions in 4.5 e) and 5.5 d) has been removed.IULTCS/IUP 38:2017(E)iv ISO 2017 All rights reservedBS EN ISO 17232:2017INTERNATIONAL ST
28、ANDARDISO 17232:2017(E)IULTCS/IUP 38:2017(E)Leather Physical and mechanical tests Determination of heat resistance of patent leather1 ScopeThis document specifies two methods for determining the heat resistance of patent leather.Method A makes use of a modified lastometer, while Method B uses the “Z
29、wik” apparatus. Both methods are applicable to patent leathers for all end uses.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 cited applies. F
30、or 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 conditioningEN 15987, Leather Termin
31、ology 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: available at h t t p :/ www .e
32、lectropedia .org/ ISO Online browsing platform: available at h t t p :/ www .iso .org/ obp4 Method A Lastometer method4.1 PrincipleA perforated test piece is distended by a specified amount. The surface is heated and any damage to the patent finish is noted.4.2 Apparatus4.2.1 Test machine, including
33、 the parts described in 4.2.1.1 to 4.2.1.4.NOTE An example of a suitable apparatus available commercially is given in Annex A.4.2.1.1 Clamp, capable of holding the test piece around its edge leaving free a central circular area of diameter (25,0 0,1) mm. The design of its clamping system shall ensur
34、e that the test piece does not slip under the test conditions and neither stretches nor compresses the central area as it is clamped. The boundary between the free and clamped area shall be sharply defined.4.2.1.2 Plunger, terminating in a steel ball of diameter (21,0 0,1) mm. ISO 2017 All rights re
35、served 1BS EN ISO 17232:2017ISO 17232:2017(E)4.2.1.3 Mechanism for thrusting the steel ball, without rotation against the test specimen.4.2.1.4 Mechanism for monitoring the distension of the steel ball, (travel from zero) to an accuracy of 0,05 mm.4.2.2 Press knife, conforming to the requirements of
36、 ISO 2419 for cutting test pieces of suitable dimensions for the test machine.4.2.3 Sewing machine needle, sharp and undamaged, PCL size 80, either fitted into holder suitable for use by hand or into sewing machine.NOTE Other sized needles are used if they are more appropriate to the sewing used in
37、the shoe production.4.2.4 Hot air blower, capable of maintaining a temperature of (100 5) C or (125 5) C.4.2.5 Temperature measuring device, reading to 1 C.4.2.6 Stopwatch, reading to 1 s.4.2.7 Soft rubber mat, minimum thickness 10 mm.4.3 Sampling and sample preparation4.3.1 Sample in accordance wit
38、h ISO 2418. Cut three test pieces by applying the press knife (4.2.2) to the patent surface.If there is a requirement for more than two hides or skins to be tested in one batch, then only one sample needs to be taken from each hide or skin, provided that the overall total is not less than three test
39、 pieces.4.3.2 If the test piece is to be perforated by hand, place the test piece on the soft rubber mat (4.2.7) with the patent surface uppermost. Using the sewing machine needle (4.2.3) fitted into a holder, pierce a hole vertically through the centre of the test piece so that the hole is within 1
40、,0 mm of the centre. Pierce four further holes through the test piece with each hole (5,0 0,5) mm from the first hole so that the first holes form a simple (Greek) cross. Ensure that the needle penetrates through the leather into the soft rubber mat.4.3.3 If the test piece is to be perforated by mac
41、hine, perforate through the centre using the needle fitted into a sewing machine (4.2.3) running at normal speed but without the thread and set at 6 stitches/10 mm.4.3.4 Condition the test piece in accordance with ISO 2419. Carry out the test in the standard atmosphere.4.4 Procedure4.4.1 Set the ins
42、trument so that the plunger is set at zero or minimum distension.4.4.2 Tightly clamp the test piece into the instrument so that the ball end of the plunger (4.2.1.2) acts on the reverse side of the test piece.4.4.3 Force the ball end of the plunger into the test piece until the test piece is distend
43、ed by 7,5 mm 0,05 mm as shown on the distension scale (4.2.1.4). Examine the test piece and note any damage.IULTCS/IUP 38:2017(E)2 ISO 2017 All rights reservedBS EN ISO 17232:2017ISO 17232:2017(E)4.4.4 Place the sensor of the temperature measuring device (4.2.5) at a distance of 1,5 mm 0,5 mm above
44、the dome of the distended test piece. Using the hot air blower (4.2.4), raise the temperature of the test piece to (100 5) C for (180 5) s for the standard test conditions or to (125 5) C for (300 5) s for the extended test conditions. Check the temperature using the temperature measuring device (4.
45、2.5) and maintain this temperature for the time given above. If the temperature goes out of the limits, reject the test piece and repeat using a fresh test piece.4.4.5 Maintain the test piece in the distended state and re-examine. Record any damage to the patent finish or the leather grain.4.4.6 Rep
46、eat steps 4.4.1 to 4.4.5 for the remaining test pieces.4.5 Test reportThe test report shall include the following:a) a reference to this document, i.e. ISO 17232:2017;b) details of any damage to the patent finish or leather grain when the test piece is first distended;c) details of any damage to the
47、 patent finish or leather grain when the test piece is heated;d) the test temperature and time (i.e. 100 C for 180 s or 125 C for 300 s);e) the standard atmosphere used for conditioning and testing as given in ISO 2419;f) any deviations from the method specified in this document;g) full details for
48、identification of the sample and any deviations from ISO 2418 with respect to sampling.5 Method B Zwik method5.1 PrincipleA perforated test piece is distended by a specified amount. The surface is heated and any damage to the patent finish is noted.5.2 Apparatus5.2.1 Test machine, constructed such t
49、hat the two ends of the test piece are held in the fixed horizontal clamp B, so that the test piece can be stretched over mandrel D.Mandrel D consists of a horizontal half cylinder of radius (15,0 0,1) mm and length (25,5 0,1) mm with a quarter sphere of radius (15,0 0,1) mm at its end. The lower (fixed) face of clamp A is in the same plane as the top line of mandrel D and clamp B is (11,0 0,1) mm vertically below the curved tip of the mandrel.The hand-operated lever C to which clamp B i
