1、December 2015 English price group 7No 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!%JY“2399354www.din.deD
2、IN EN ISO 17235Leather Physical and mechanical tests Determination of softness (ISO 17235:2015);English version EN ISO 17235:2015,English translation of DIN EN ISO 17235:2015-12Leder Physikalische und mechanische Prfungen Bestimmung der Weichheit (ISO 17235:2015);Englische Fassung EN ISO 17235:2015,
3、Englische bersetzung von DIN EN ISO 17235:2015-12Cuir Essais physiques et mcaniques Dtermination de la souplesse (ISO 17235:2015);Version anglaise EN ISO 17235:2015,Traduction anglaise de DIN EN ISO 17235:2015-12SupersedesDIN EN ISO 17235:2012-03www.beuth.deDocument comprises 10 pagesDTranslation by
4、 DIN-Sprachendienst.In case of doubt, the German-language original shall be considered authoritative.01.16 DIN EN ISO 17235:2015-12 2 A comma is used as the decimal marker. National foreword This document (EN ISO 17235:2015) has been prepared by Technical Committee CEN/TC 289 “Leather” (Secretariat:
5、 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 Committee NA 062-05-51 AA Anforderu
6、ngen und physikalische Prfverfahren fr Leder und seine Ausgangsprodukte. 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 Amendments This standard differs from DIN EN ISO 17235:2012-03 as fol
7、lows: a) Subclauses 4.1, 4.1.8 and 4.2 have been technically revised; b) Subclauses 6.2, 6.5, 6.8 and 6.9 have been technically revised; c) Clause 7, item c) has been technically revised; d) Annex A has been technically revised. Previous editions DIN EN ISO 17235: 2003-10, 2012-03 National Annex NA
8、(informative) Bibliography DIN EN ISO 2418, Leather Chemical, physical and mechanical and fastness tests Sampling location DIN EN ISO 2419, Leather Physical and mechanical tests Sample preparation and conditioning EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 17235 September 2015 ICS 59.1
9、40.30 Supersedes EN ISO 17235:2011English Version Leather - Physical and mechanical 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 1
10、7235:2015) This European Standard was approved by CEN on 8 August 2015. 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 bibliograp
11、hical 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 the responsibili
12、ty 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 Yugoslav Republic o
13、f Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey andUnited Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATIO
14、N EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue 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 17235:2015 EForeword 1 Scope .2 Normative references 3 Principle 4 Apparatus
15、 .5 Sampling and sample preparation 6 Procedure.7 Test report .Annex A (informative) Source of apparatus Contents PageEuropean foreword 3 2EN ISO 17235:2015 (E) 876655554DIN EN ISO 17235:2015-12 European foreword This document (EN ISO 17235:2015) has been prepared by Technical Committee CEN/TC 289 “
16、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 an identical text or by endorse
17、ment, at the latest by March 2016, and conflicting national standards shall be 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 of patent rights. CEN and/or CENELEC s
18、hall 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 Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, D
19、enmark, 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
20、 notice The text of ISO 17235:2015 has been approved by CEN as EN ISO 17235:2015 without any modification. 3EN ISO 17235:2015 (E) DIN EN ISO 17235:2015-12 ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The
21、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 represented on that committee. International organizations, governmental and non-gover
22、nmental, 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
23、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/IEC Directives, Part 2 (www.iso.org/directives).Attention is drawn to the possibi
24、lity 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 of p
25、atent 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 as inf
26、ormation about ISOs adherence 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,
27、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 Agreement on technical cooperation between ISO and CEN (Vienna Agreement).IULTCS, originally formed in 1897, is a wo
28、rld-wide organization of 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 standard
29、izing body for the preparation 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.4EN ISO 17235:2015 (E) DIN EN ISO 17235:2015-12 1 ScopeThis Int
30、ernational 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 leather, leathergoods leather, and apparel leather.2 Normative referencesThe following documents, in whole or in part, are n
31、ormatively referenced in 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 fas
32、tness tests Sampling locationISO 2419, Leather Physical and mechanical tests Sample preparation and conditioning3 PrincipleA cylindrical rod of defined mass is lowered at a specified rate onto a securely clamped area of leather. The distension of the leather produced is recorded as the softness.4 Ap
33、paratus4.1 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 into 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
34、 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 both before the load pin is released and when the maximum force is applied while leaving the portion over the aperture free
35、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 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 surfa
36、ce 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 distance 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
37、 by the load pin.5EN ISO 17235:2015 (E) DIN EN ISO 17235:2015-12 4.1.8 Forces when measured in a static position, the effective total test force is composed of 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
38、 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 Flat rigid metal disc, for setting gauge (4.1.7) to zero, minimum diameter 60 mm.KeyA apertureB clampsC load pinD cylindrical loadFigure 1 Layo
39、ut of the test machine5 Sampling and sample preparationCondition the leather in accordance with ISO 2419.NOTE It is possible to take measurements without physically 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 ape
40、rtures 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. upholstery leathers and softer shoe upper leathers; 20 mm, measurement of softer leathers, e.g. apparel leathers.6.2 Open the test machine and place
41、 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 machine to clamp the metal disc in position.6EN ISO 17235:2015 (E) DIN EN ISO 17235:2015-12 6.4 Release the load pin, allow the reading on the gaug
42、e to become steady, and set to zero. Open the test machine and remove the metal disc.6.5 Place the area of the leather 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
43、defects such as flay cuts or scar tissue over the aperture.6.6 Raise the load pin and close the test machine to clamp 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
44、 to 6.7 using at least three separate and non-overlapping areas of leather, in accordance with ISO 2418. To guarantee 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 individua
45、l readings and the mean value of the readings.7 Test reportThe test report shall include the following:a) reference to 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)
46、 standard atmosphere used for conditioning and testing as given in ISO 2419;e) any deviations from the method specified in this International Standard;f) full details for identification of the sample and any deviations from ISO 2418 with respect to sampling.7EN ISO 17235:2015 (E) DIN EN ISO 17235:20
47、15-12 Annex A (informative) Source of apparatusExamples of sources of suitable 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-engineering.co.uk8EN ISO 17235:2015 (E) DIN EN ISO 17235:2015-12
