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1、INTERNATIONAL STANDARD ISO 5978 Second edition 1990-02-15 Rubber- or plastics-coated fabrics - Determination of blocking resistance Supports textiles revetus de caoutchouc ou de plastique - Determination de la rksistance au blocage Reference number ISO 5978: 199O(E) Copyright International Organizat
2、ion for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/26/2007 19:13:06 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 5978:199O(E) Foreword ISO (the International Organization for Standardizatio
3、n) is a worldwide federation of national Standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Esch member body interested in a subject for which a technical committee has been established has the right to be rep
4、resented on that committee. International organizations, govern- mental and non-governmental, in liaison with ISO, also take patt in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Oraft International Sta
5、ndards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by the ISO Council. They are approved in accordance with lS0 procedures requiring at least 75 % approvai by the member bodies voting. International Standard
6、ISO 5978 was prepared by Technical Committee ISO/TC 45, Rubber and rubber products. This second edition cancels and replaces the fit-st edition (ISO 5978:1979), of which it constitutes a minor technical revision. 0 ISO 1990 All rights reserved. No part of this publication may be reproduced or utiliz
7、ed in any form or by any means, electronie or mechanical, including photocopying and microfilm, without Permission in writing from the publisher. International Organization for Standardization Case Postale 56 l CH-1211 Geneve 20 l Switzerland Printed in Switzerland ii Copyright International Organiz
8、ation for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/26/2007 19:13:06 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 5978:1990(E) lntroduction Blocking tests at elevated temperatures are desi
9、gned to estimate the relative resistance of rubber- or plastics-coated fabrics to blocking. For this purpose, the coated fabric is subjected to a specified load over a defined area at a specific temperature. . . . Ill Copyright International Organization for Standardization Provided by IHS under lic
10、ense with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/26/2007 19:13:06 MDTNo reproduction or networking permitted without license from IHS -,-,- This page intentionally left blank Copyright International Organization for Standardization Provided by IHS under license with IS
11、O Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/26/2007 19:13:06 MDTNo reproduction or networking permitted without license from IHS -,-,- INTERNATIONAL STANDARD ISO 5978:199O(E) Rubber- or plastics-coated fabrics - Determination of blocking resistance 1 Scope This International
12、Standard specifies a method for the determination of the resistance of rubber- or plastics-coated fabrics to blocking. The method specified is acceptable in most cases. If it is desired to use conditions other than those specified, these may be mutually agreed between the contracting Parties but suc
13、h variations shall be stated in the test report. 2 Normative reference The following Standard contains provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publi- cation, the edition indicated was valid. All Standards are subject to r
14、evision, and Parties to agreements based on this International Standard are encour- aged to investigate the possibility of applying the most recent edition of the Standard indicated below. Members of IEC and ISO maintain registers of cur- rently valid International Standards. ISO 2231:1989, Rubber-
15、or plastics-coated fabrics - Standard atmospheres for conditioning and testing. 3 Definition For the purposes of this International Standard, the following definition applies. blocking: An unintentional adherence between ma- terials. Definition taken from ISO 472:1988, Plastics - Vo- cabulary. 4 App
16、aratus 4.1 Glass plates, measuring approximately 150 mm x 150 mm x 3 mm. 4.2 Weight-piece, of mass 5,0 kg. 4.3 Circulating-air oven, of such a size that the total volume of the test assemblies does not exceed 10 % of the free space in the oven. Provision shall be made for placing the test assem- bli
17、es on shelves so they are not less than 50 mm from each other or from the sides of the oven. The nature of the Source of heat is optional but the Source shall be located in the air supply of the oven. Provision shall be made for circulation of air through the oven at a rate such as to provide a mini
18、mum of six air changes per hour. The temperature of the oven shall be thermostatically controlled to maintain the temper- ature of the test assemblies within +2 “C of the - specified temperature. Baffles shall be used as required to prevent over- heating and dead-spots. 5 Time interval between manuf
19、acture and testing 5.1 For all purposes, the minimum time between manufacture and testing shall be 16 h. 5.2 For non-product tests, the maximum time be- tween manufacture and testing shall be four weeks, and for evaluations intended to be comparable, the tests, as far as possible, shall be carried o
20、ut after the Same time interval. 5.3 For product tests, whenever possible, the time between tnanufacture and testing shall not exceed three months. In other cases, tests shall be made within two months of the date of receipt by the cus- tomer. 1 Copyright International Organization for Standardizati
21、on Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/26/2007 19:13:06 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 5978:1990(E) 6 Samples and test pieces 6.1 Samples shall be taken not less than 1 m from the end
22、of the roll. 6.2 The test pieces for each Sample to be tested shall consist of six specimens, each 150 mm x 150 mm. 6.3 Test pieces shall be representative sf the ma- terial being tested. They shall be taken from the working width of the Sample. They shall be tut with one edge parallel to the longit
23、udinal axis of the Sample. The longitudinal and lateral axes shall be maked on the test pieces. 7 Conditioning of test pieces The test pieces shall be conditioned in one of the Standard atmospheres as defined in ISO 2231. 8 Procedure 8.1 Arrange the test pieces in pairs, back to back, face to face a
24、nd back to face, to form a pile 150 mm Square. Place the test pieces thus arranged between two glass plates (4.1). Place the 5,0 kg weight-piece (4.2) on the top plate in a Position to ensure an even distribution of pressure: 8.2 Expose the test assembly for 3 h at a temper- ature of 70 “C + 2 “C in
25、 the oven (4.3). 8.3 At the end of the exposure period, remove the test assembly from the oven, immediately take the test piece from between the plates and allow it to cool for 1 h. Then carefully separate the test pieces and examine them for adherence or peeling of the coatings. 8.4 Rate the resist
26、ance of each blocking by the scale given below: 9 1 - No blocking: coated surfa out any evidente of adhering. ces separate with- test piece to 2- Slight blocking: some adherence of coated surfaces takes place on Separation, but without detriment to the coating. 3- Blocking: coated surfaces are diffi
27、cult to separate; the coating or part of the coating is removed during Separation. Test report The test report shall include the following partic- ulars: a) a reference to this International Standard; b) all details necessary for the identification of the Sample; c) the conditioning atmosphere used
28、(see clause 7); d) the total mass on the test piece; e) the rating for resistance to blocking, in accord- ante with 8.4; f) any departure from the procedure specified. 2 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards
29、1/9972545001 Not for Resale, 04/26/2007 19:13:06 MDTNo reproduction or networking permitted without license from IHS -,-,- This page intentionally left blank Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001
30、 Not for Resale, 04/26/2007 19:13:06 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 5978:1990(E) l UDC 678.066:677.017.424.25 Descriptors: coated fabrics, fabrics coated with rubber, fabrics coated with plastics, tests, adhesion tests, adhesive strength. Price based on 2 pages Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/26/2007 19:13:06 MDTNo reproduction or networking permitted without license from IHS -,-,-