ISO INTERNATIONAL STANDARD 7664 First edition 2000-09-15 Rubber, raw natural and raw synthetic General guidance on storage Caoutchouc, naturel brut et synthetique brut - Guide genéral pour le stockage Reference number ISO 7664:2000(E) ISO @ ISO 2000 ISO 7664:2000(E) PDFdisclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The IsO Central Secretariat accepts no liability in this area. Adobe is a trademarkof Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. ?ISO2000 All rights 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 ISO's member body in the country of the 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 [email protected] Web www.iso.ch Printed in Switzerland ii @ IsO 2000 - All rights reserved ISO 7664:2000(E) Foreword IsO (the International Organization for Standardization) is a worldwide federation of national standards bodies (isO member bodies). The work of preparing International Standards is normally carried out through ISsO technical the right to be represented on that committee. International organizations, governmental and non-governmental, 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. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting Attention is drawn to the possibility that some of the elements of this International Standard may be the subject oi patent rights. IsO shall not be held responsible for identifying any or all such patent rights International Standard ISO 7664 was prepared by Technical Committee ISO/TC 45, Rubber and rubber products, Subcommittee SC 3, Raw materials (including latex) for use in the rubber industry. ThisfirsteditioncancelsandreplacesISO/TR7664:1984,whichhasbeentechnicallyrevised @ ISO 2000 - All rights reserved ii ISO 7664:2000(E) Introduction Under unfavourable storage conditions, all types of raw rubber change to a certain extent in their physical and/or chemical properties. Ultimately, they may become unserviceable, for example because of hardening, softening, properties of the vulcanizates. These changes may be the result of one particular factor or a combination of factors, mainly the action of oxygen, light, heat and humidity. The deleterious effects of these factors may, however, be minimized by an appropriate choice of storage conditions. This International Standard, therefore, indicates the most suitable conditions for storage. iv @ISO2000 -All rights reserved INTERNATIONAL STANDARD ISO7664:2000(E) Rubber, raw natural and raw synthetic General guidance on storage 1 Scope This International Standard provides information on the most suitable conditions for the storage of raw natural and rawsyntheticrubberdeliveredintheformof bales. For rubber delivered in the form of powder, loose crumb or pellets, extra care should be taken because of the far temperature and/or pressure. 2Storage accommodation 2.1Temperature The stor