Testing coated fabrics

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1 BRITISH STANDARD BS : 1996 ISO 1419:1995 Incorporating Amendments Nos. 1 and 2 Testing coated fabrics Part 12: Accelerated ageing tests ICS

2 Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee PRI/78, Coated fabrics, upon which the following bodies were represented: The British Apparel and Textile Confederation British Plastics Federation British Railways Board British Rubber Manufacturers Association British Textile Technology Group Department of Health Department of the Environment (Building Research Establishment) Furniture Industry Research Association Rapra Technology Ltd. Home Office Made-Up Textile Association SATRA Footwear Technology Centre Safety Equipment Association Society of Motor Manufacturers and Traders Ltd. This British Standard, having been prepared under the direction of the Sector Board for Materials and Chemicals, was published under the authority of the Standards Board and comes into effect on 15 May 1996 BSI 18 September 2002 First published May 1990 Second edition May 1996 The following BSI references relate to the work on this standard: Committee reference PRI/78 Draft for comment 92/41757 DC Amendments issued since publication Amd. No. Date Comments November 1998 National foreword amended September 2002 See national foreword ISBN

3 Contents Page Committees responsible Inside front cover National foreword ii Introduction 1 1 Scope 1 2 Normative references 1 3 Clause deleted 1 4 Clause deleted 1 5 Clause deleted 1 6 Method D: Ageing test for nitrocellulose-type coatings 2 BSI 18 September 2002 i

4 National foreword This Part of BS 3424 has been prepared by Technical Committee PRI/78, and is derived from ISO 1419:1995, Rubber or plastics coated fabrics Accelerated-ageing tests, published by the International Organization for Standardization (ISO). It is a revision of BS :1990, which is withdrawn. Attention is drawn to the additional information. The start and finish of text introduced or altered by amendment is indicated in the text by tags. For example, text altered by Amendment No. 1 is indicated by. Methods A and B in this Part of BS 3424 have been superseded by BS EN :1998, Rubber- or plastics-coated fabrics Accelerated ageing tests Heat ageing, which specifies three methods (method 1, oven method; method 2, volatile loss method; method 3, activated carbon method). Method C in this Part of BS 3424 has been superseded by BS EN :2002, Rubber- or plastics-coated fabrics Accelerated ageing tests Environmental ageing. However, this Part of BS 3424 remains current because Method D is still relevant. Additional information In the UK it is common practice to employ a conditioning atmosphere conforming to atmosphere A of BS :1992 (ISO 2231). Cross-references The British Standards which implement international publications referred to in this document may be found in the BSI Catalogue under the section entitled International Standards Correspondence Index, or by using the Search facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 and 2, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. ii BSI 18 September 2002

5 Introduction The ageing of coated fabrics consists in subjecting test pieces, with previously determined physical properties, to a controlled deteriorating influence for a known period. The selection of the most appropriate test method(s), ageing time and temperature will depend on the purpose of the test and the type of coated fabric. The physical properties used to measure the deterioration of coated fabrics may be strength properties, flexing, blocking or any other desired physical or chemical property. By selection of appropriate methods of test, the physical properties can be investigated. WARNING Persons using this International Standard should be familiar with normal laboratory practice. This standard does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user to establish appropriate safety and health practices and to ensure compliance with any national regulatory conditions. 1 Scope This International Standard describes four methods of assessing the resistance of coated fabrics to deterioration by accelerated ageing. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO 2231:1989, Rubber- or plastics-coated fabrics Standard atmospheres for conditioning and testing. ISO 2286:1986, Rubber- or plastics-coated fabrics Determination of roll characteristics. 3 Clause deleted 4 Clause deleted 5 Clause deleted BSI 18 September

6 6 Method D: Ageing test for nitrocellulose-type coatings 6.1 General In a similar way to PVC-coated fabrics, nitrocellulose-coated fabrics may lose plasticizer by volatilization, and in time this will have an adverse effect on the flexibility of the coating. This is particularly relevant in book-binding, which is the main end-use for this type of product, where long-term flexibility at the hinge is required. This test attempts to simulate and accelerate this situation, and hence the end-point is based on visual inspection rather than mass loss. 6.2 Apparatus Three test-tubes, measuring 150 mm 25 mm Three clean corks, to fit the tubes Air oven, in which there is a slow circulation of air, providing not less than three and not more than ten air changes per hour, equipped with a suitable means of controlling and measuring the rate of air flow. Means shall be provided for maintaining the oven at the required temperature and, if necessary, the required relative humidity, and for the introduction of temperature-measuring and, if necessary, humidity-measuring instruments at a suitable position for measuring the operating conditions. The incoming air shall be at the temperature specified before coming into contact with the test pieces. Any electric elements used for heating the incoming air shall be shielded to avoid direct radiation on to the test pieces. No copper or copper alloy shall be within the ageing chamber of the oven. The oven shall be of such a size that the total volume of the test pieces does not exceed 10 % of the free air space in the oven. Means shall be provided for suspending the test pieces vertically within the oven so that they are not within 10 mm of each other nor within 50 mm of the inner surfaces of the oven. The temperature of the oven shall be maintained at 70 C ±1 C. 6.3 Preparation of test pieces Cut three test pieces, each measuring 150 mm 75 mm, selected so that, as far as possible, they are evenly spaced across the sample, but not within 50 mm of a selvedge, and with their length in the longitudinal or transverse direction. 6.4 Procedure Roll up each test piece along its length with the coating outermost and insert into a 150 mm 25 mm test-tube. Place a clean fresh cork lightly into the mouth of each test-tube and place the assembly in the oven, maintained at 70 C ±1 C. After 168 h (7 days) at this temperature, remove the test-tubes from the oven, take out the test pieces and condition them in atmosphere A, B or C as defined in ISO 2231:1989. While still in the standard atmosphere, fold each test piece sharply along its length between the fingers, with the coating outermost. Examine the test piece and record any cracks in the coating. 6.5 Test report The test report shall include the following information: a) a reference to this International Standard and to the method used (method D); b) all details necessary for the identification of the coated fabric tested; c) the conditioning atmosphere used; d) whether any cracks were observed in the coating; e) details of any deviation from the test procedure specified. 2 BSI 18 September 2002

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8 ISO 1419:1995 BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter. Revisions British Standards are updated by amendment or revision. Users of British Standards should make sure that they possess the latest amendments or editions. It is the constant aim of BSI to improve the quality of our products and services. We would be grateful if anyone finding an inaccuracy or ambiguity while using this British Standard would inform the Secretary of the technical committee responsible, the identity of which can be found on the inside front cover. Tel: +44 (0) Fax: +44 (0) BSI offers members an individual updating service called PLUS which ensures that subscribers automatically receive the latest editions of standards. Buying standards Orders for all BSI, international and foreign standards publications should be addressed to Customer Services. Tel: +44 (0) Fax: +44 (0) Standards are also available from the BSI website at In response to orders for international standards, it is BSI policy to supply the BSI implementation of those that have been published as British Standards, unless otherwise requested. Information on standards BSI provides a wide range of information on national, European and international standards through its Library and its Technical Help to Exporters Service. Various BSI electronic information services are also available which give details on all its products and services. Contact the Information Centre. Tel: +44 (0) Fax: +44 (0) info@bsi-global.com. Subscribing members of BSI are kept up to date with standards developments and receive substantial discounts on the purchase price of standards. For details of these and other benefits contact Membership Administration. Tel: +44 (0) Fax: +44 (0) membership@bsi-global.com. Information regarding online access to British Standards via British Standards Online can be found at Further information about BSI is available on the BSI website at BSI 389 Chiswick High Road London W4 4AL Copyright Copyright subsists in all BSI publications. BSI also holds the copyright, in the UK, of the publications of the international standardization bodies. Except as permitted under the Copyright, Designs and Patents Act 1988 no extract may be reproduced, stored in a retrieval system or transmitted in any form or by any means electronic, photocopying, recording or otherwise without prior written permission from BSI. This does not preclude the free use, in the course of implementing the standard, of necessary details such as symbols, and size, type or grade designations. If these details are to be used for any other purpose than implementation then the prior written permission of BSI must be obtained. Details and advice can be obtained from the Copyright & Licensing Manager. Tel: +44 (0) Fax: +44 (0) copyright@bsi-global.com.

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