1、BSI Standards PublicationBS EN ISO 17235:2015Leather Physical andmechanical tests Determination of softness BS EN ISO 17235:2015 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO 17235:2015. It supersedes BS EN ISO 17235:2011 which is withdrawn.The UK particip
2、ation 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.This publication does not purport to include all the necessary provisions of a contract. Users
3、are responsible for its correct application. The British Standards Institution 2015.Published by BSI Standards Limited 2015ISBN 978 0 580 83033 4 ICS 59.140.30 Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of
4、the Standards Policy and Strategy Committee on 30 September 2015.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 17235 September 2015 ICS 59.140.30 Supersedes EN ISO 17235:2011English Version Leather - Physical and me
5、chanical tests - Determination of softness (ISO 17235:2015) Cuir - Essais physiques et mcaniques - Dtermination de la souplesse (ISO 17235:2015) Leder - Physikalische und mechanische Prfungen - Bestimmung der Weichheit (ISO 17235:2015) This European Standard was approved by CEN on 8 August 2015. CEN
6、 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 on appl
7、ication 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-CENELEC Ma
8、nagement 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, Italy, Lat
9、via, 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: Avenue Marn
10、ix 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 17235:2015 EBS EN ISO 17235:2015EN ISO 17235:2015 (E) 3 European foreword This document (EN ISO 17235:2015) has been prepared by Technical Committee CE
11、N/TC 289“Leather”, the secretariat of which is held by UNI, in collaboration with Technical Committee 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 anidentical text or by
12、endorsement, at the latest by March 2016, and conflicting national standards shallbe withdrawn at the latest by March 2016. This document supersedes EN ISO 17235:2011. Attention is drawn to the possibility that some of the elements of this document may be the subject ofpatent rights. CEN and/or CENE
13、LEC shall not be held responsible for identifying any or all such patentrights. According to the CEN-CENELEC Internal Regulations, the national standards organizations of thefollowing countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,Croatia, Cyprus, Czech Republic,
14、 Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,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
15、notice The text of ISO 17235:2015 has been approved by CEN as EN ISO 17235:2015 without any modification. BS EN ISO 17235:2015ISO 17235:2015(E)IULTCS/IUP 36:2015(E)Foreword iv1 Scope . 12 Normative references 13 Principle 14 Apparatus . 15 Sampling and sample preparation 26 Procedure. 27 Test report
16、 . 3Annex A (informative) Source of apparatus 4 ISO 2015 All rights reserved iiiContents PageBS EN ISO 17235:2015ISO 17235:2015(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing Interna
17、tional 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-governmental, in liaison with
18、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 ISO/IEC Directives, P
19、art 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 (www.iso.org/directives).Attention is drawn to the possibility that some of the ele
20、ments 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 of patent declarations receiv
21、ed (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 as information about ISOs adher
22、ence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary information.ISO 17235 was prepared by the Physical Test Commission of the International Union of Leather Technologists and Chemists Societies (IUP Commission, IULTCS) in collaboration
23、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 Agreement on technical cooperation between ISO and CEN (Vienna Agreement).IULTCS, originally formed in 1897, is a world-wide organization of
24、professional leather 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 prepar
25、ation of test methods for leather.This third edition cancels and replaces the second edition (ISO 17235:2011), 4.1, 4.1.8, 4.2, 6.2, 6.5, 6.8, 6.9, Clause 7 c), and Annex A of which have been technically revised.IULTCS/IUP 36:2015(E)iv ISO 2015 All rights reservedBS EN ISO 17235:2015INTERNATIONAL ST
26、ANDARDISO 17235:2015(E)IULTCS/IUP 36:2015(E)Leather Physical and mechanical tests Determination of softness1 ScopeThis International Standard specifies a non-destructive method for determining the softness of leather. It is applicable to all non-rigid leathers, e.g. shoe upper leather, upholstery le
27、ather, leathergoods leather, and apparel 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
28、 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 conditioning3 PrincipleA cylindrical rod of defined mass is lowered at a speci
29、fied rate onto a securely clamped area of leather. The distension of the leather produced is recorded as the softness.4 Apparatus4.1 Test machine, shown in Figure 1, including the parts described in 4.1.1 to 4.1.7.4.1.1 Circular aperture, A, diameter 35,0 mm 0,1 mm.4.1.2 Metal rings, able to fit int
30、o aperture A and reduce the diameter of the aperture to 25,0 mm 0,1 mm and 20,0 mm 0,1 mm, respectively.NOTE The apertures described above are more conveniently referred to by their nominal diameters of 35 mm, 25 mm, and 20 mm, respectively.4.1.3 Clamps, B, capable of holding the leather securely bo
31、th before the load pin is released and when the maximum force is applied while leaving the portion over the aperture free to move.4.1.4 Cylindrical load pin, C, diameter 4,9 mm 0,1 mm and length 11,5 mm 0,1 mm rigidly attached to a cylindrical mass, D. The total mass of load pin and cylindrical load
32、 shall be 530 g 10 g.4.1.5 Means of guiding the load pin, such that the load pin acts perpendicularly to the leather surface and the vertical travel of the load pin is restricted to a distance of 11,5 mm 0,1 mm.4.1.6 Means of lowering the load pin, such that the load pin travels its full permitted d
33、istance of 11,5 mm 0,1 mm in 1,5 s 0,5 s.4.1.7 Gauge, reading to 0,1 mm, to directly measure the distension of the leather by the load pin. ISO 2015 All rights reserved 1BS EN ISO 17235:2015ISO 17235:2015(E)4.1.8 Forces when measured in a static position, the effective total test force is composed o
34、f the combined force exerted by the load pin (4.1.4) and the cylindrical load (D) of (5,20 0,1) N and an additional linearly decreasing spring force ranging from (0,73 0,1) N at the 0,0mm position to (0,5 0,1) N at 6,5 mm, so that the effective total test force is in a range of 6,13 N to 5,5 N.4.2 F
35、lat rigid metal disc, for setting gauge (4.1.7) to zero, minimum diameter 60 mm.KeyA apertureB clampsC load pinD cylindrical loadFigure 1 Layout of the test machine5 Sampling and sample preparationCondition the leather in accordance with ISO 2419.NOTE It is possible to take measurements without phys
36、ically cutting a sample from the hide or skin.6 Procedure6.1 Select the aperture from 35 mm, 25 mm, or 20 mm.NOTE It is suggested that the apertures are used as follows: 35 mm, measurement of firmer leathers, e.g. shoe upper leathers; 25 mm, measurement of leathers of, moderate softness, e.g. uphols
37、tery leathers and softer shoe upper leathers; 20 mm, measurement of softer leathers, e.g. apparel leathers.6.2 Open the test machine and place the metal disc (4.2) on the upper face of the lower part of clamp B such that it covers the circular aperture.6.3 Raise the load pin and close the test machi
38、ne to clamp the metal disc in position.IULTCS/IUP 36:2015(E)2 ISO 2015 All rights reservedBS EN ISO 17235:2015ISO 17235:2015(E)6.4 Release the load pin, allow the reading on the gauge to become steady, and set to zero. Open the test machine and remove the metal disc.6.5 Place the area of the leather
39、 defined in ISO 2418 such that it covers the whole of the upper face of the lower part of clamp B and the aperture, ensuring that the leather lies flat and that there are no obvious defects such as flay cuts or scar tissue over the aperture.6.6 Raise the load pin and close the test machine to clamp
40、the leather in position.6.7 Release the load pin, allow the reading on the gauge to become steady, and record the reading. Open the test machine and remove the leather.6.8 Repeat 6.5 to 6.7 using at least three separate and non-overlapping areas of leather, in accordance with ISO 2418. To guarantee
41、that the areas are non-overlapping, the distance between the centres of each area shall be a distance apart which is greater than the diameter of the clamp B.6.9 Report the individual readings and the mean value of the readings.7 Test reportThe test report shall include the following:a) reference to
42、 this International Standard, i.e. ISO 17235;b) nominal aperture(s) used in tests;c) identification of the areas tested and the individual and mean readings for each aperture used;d) standard atmosphere used for conditioning and testing as given in ISO 2419;e) any deviations from the method specifie
43、d in this International Standard;f) full details for identification of the sample and any deviations from ISO 2418 with respect to sampling.IULTCS/IUP 36:2015(E) ISO 2015 All rights reserved 3BS EN ISO 17235:2015ISO 17235:2015(E)Annex A (informative) Source of apparatusExamples of sources of suitabl
44、e apparatus available commercially are given below. This information is given for the convenience of users of this International Standard and does not constitute an endorsement by ISO of these products. MSA ENGINEERING SYSTEMS LIMITED, 3 Assured Drive, Thurmaston, Leicester, LE4 8BB, UK, www.msa-eng
45、ineering.co.ukIULTCS/IUP 36:2015(E)4 ISO 2015 All rights reservedBS EN ISO 17235:2015This page deliberately left blankThis page deliberately left blankBSI is the national body responsible for preparing British Standards and other standards-related publications, information and services.BSI is incorp
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