SANS 17229-2009 Leather - Physical and mechanical tests - Determination of water vapour absorption《皮革 物理和机械试验 水蒸气吸收率的测定》.pdf

1、 Collection of SANS standards in electronic format (PDF) 1. Copyright This standard is available to staff members of companies that have subscribed to the complete collection of SANS standards in accordance with a formal copyright agreement. This document may reside on a CENTRAL FILE SERVER or INTRA

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3、damage whatsoever than may result from the use of this material or the information contain therein, irrespective of the cause and quantum thereof. ISBN 978-0-626-22850-7 SANS 17229:2009Edition 1ISO 17229:2002Edition 1SOUTH AFRICAN NATIONAL STANDARD Leather Physical and mechanical tests Determination

4、 of water vapour absorption This national standard is the identical implementation of ISO 17229: 2002 and is adopted with the permission of the International Organization for Standardization. Published by SABS Standards Division 1 Dr Lategan Road Groenkloof Private Bag X191 Pretoria 0001Tel: +27 12

5、428 7911 Fax: +27 12 344 1568 www.sabs.co.za SABS SANS 17229:2009 Edition 1 ISO 17229:2002 Edition 1 Table of changes Change No. Date Scope National foreword This South African standard was approved by National Committee SABS SC 1016A, Test methods leather and footwear Test methods for leather and f

6、ootwear, in accordance with procedures of the SABS Standards Division, in compliance with annex 3 of the WTO/TBT agreement. This SANS document was published in August 2009. Reference numberISO 17229:2002(E)IULTCS/IUP 42ISO 2002INTERNATIONAL STANDARD ISO17229IULTCS/IUP42First edition2002-12-15Leather

7、 Physical and mechanical tests Determination of water vapour absorption Cuir Essais physiques et mcaniques Dtermination de labsorption de vapeur deau SANS 17229:2009This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO 17229:2002(E) PDF disclai

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11、ts reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs member body in the country of the

12、 requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2002 All rights reservedSANS 17229:2009This s tandard may only be used and printed by approved subscription and free

13、mailing clients of the SABS .ISO 17229:2002(E) ISO 2002 All rights reserved iiiContents Page Foreword iv 1Scope12Normative references13Principle14Apparatus.15Sampling and sample preparation.16Procedure.27Expression of results28Test report2Annex A (informative) Water vapour number3SANS 17229:2009This

14、 s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO 17229:2002(E) iv ISO 2002 All rights reservedForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The wor

15、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

16、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. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The m

17、ain task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. A

18、ttention 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. ISO 17229 was prepared by the Physical Test Commission of the International Union of Leather Technolog

19、ists 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 Agreement on technical cooperation between ISO and CEN (Vienna Agreemen

20、t). It is based on IUP 42 which was published in J. Soc. Leather Tech. Chem. 84, p. 395, (2000) and confirmed as an official method in March 2001. SANS 17229:2009This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .INTERNATIONAL STANDARD ISO 17229

21、:2002(E) ISO 2002 All rights reserved 1Leather Physical and mechanical tests Determination of water vapour absorption 1 ScopeThis International Standard specifies a method for determining the water vapour absorption of leather. The methodis applicable for all leathers but is particularly relevant fo

22、r leathers intended for footwear uppers and linings.ISO 2418Leather - Chemical, physical and mechanical and fastness tests - Sampling locationISO 2419Leather - Physical and mechanical tests - Sample preparation and conditioningISO 3696:1987Water for analytical laboratory use - Specification and test

23、 methods3 PrincipleThe test piece and an impermeable material are clamped over the opening of a metal container containing 50 ml ofwater for a specified time. The water vapour absorption of the test piece is determined by the increase in mass.4 Apparatus4.1 Cylindrical metal or glass container, with

24、 internal diameter of 35 mm 0,5 mm, internal depth 104 mm 1mm and an external diameter at the top opening of at least 55 mm, fitted with a metal ring or lid which can besecurely clamped to the cylindrical metal container.4.2 Balance, weighing to 0,001 g.4.3 Stop clock, reading to 1 min.4.4 Vernier c

25、allipers, reading to 0,1 mm.4.5 Disc of impermeable material, for example rubber or metal, with the same diameter as the test piece.4.6 Press knife, the inner wall of which is a right angled circular cylinder of diameter 43 mm 1 mm as specifiedin ISO 2419.4.7Distilled or deionized water, conforming

26、to the requirements of grade 3 of ISO 3696:1987.5 Sampling and sample preparation5.1Sample in accordance with ISO 2418. From the sample, cut three circular test pieces by applying the pressknife to the grain surface, if distinguishable.NOTEIf there is a requirement for more than two hides or skins t

27、o be tested in one batch, then only one test piece need betaken from each hide or skin, provided that the overall total is not less than three test pieces.2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the

28、edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. SANS 17229:2009This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO 17229:2002(E) 2 ISO 2002 All rights reservedNO

29、TE Results will vary depending on the conditioning method used.5.3 Weigh the test piece to the nearest 0,001 g and record its mass as M1.6 Procedure6.1 Using vernier callipers, measure the internal diameter of the cylindrical container (to the nearest 0,1 mm) intwo mutually perpendicular directions

30、and calculate the mean diameter.6.2 Pour 50 ml 5 ml of distilled or deionized water at 20 C 2 C or 23 C 2 C into the cylindrical metalcontainer (4.1).6.3 Place the test piece centrally over the container with the side which would be exposed to the higher humidityin use facing downwards. Place a disc

31、 of impermeable material over the test piece and clamp the upper ring or lidin place taking care not to splash water onto the test piece.6.4 Keep the container at a temperature of 20 C 2 C or 23 C 2 C for 8 h 0,1 h.6.5 Remove the test piece, weigh immediately to the nearest 0,001 g and record its ma

32、ss as M2.6.6 If the test piece is splashed with water discard it and repeat the test with a fresh test piece.7 Expression of resultsCalculate the water vapour absorption, Awv, in milligrams per square centimetre, using the following equation:2512104dMMAwvwhereM1is the initial mass of the test piece,

33、 in grams;M2is the final mass of the test piece, in grams;d is the internal diameter of the cylindrical container, in millimetres.8 Test reportThe test report shall include the following:a) reference to this International Standard, i.e. ISO 17229:2002;b) the mean water vapour absorption, Awv, in mil

34、ligrams per square centimetre, expressed to one decimal place;c) the standard atmosphere used for conditioning and testing as given in ISO 2419 (i.e., 20 C/65 % relativehumidity or 23 C/50 % relative humidity);d) any deviations from the method specified in this International Standard;e) full details

35、 for identification of the sample and any deviation from ISO 2418 with respect to sampling.5.2Condition the test piece in accordance with ISO 2419.SANS 17229:2009This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO 17229:2002(E) ISO 2002 All r

36、ights reserved 3Annex A(informative)Water vapour numberIt is common practice to combine the results of water vapour permeability, Pwv, as determined in ISO 14268, andwater vapour absorption, Awv, as determined in this standard, to determine the water vapour number, Wpn.Calculate the water vapour num

37、ber, Wpn, in milligrams per square centimetre 8 hours, using the following equation:wvwvpnAPtW wheret is 8 h;Pwvis the water vapour permeability;Awvis the water vapour absorption.SANS 17229:2009 SABSThis s tandard may only be used and printed by approved subscription and freemailing clients of the S

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