ISO INTERNATIONAL STANDARD 3344 Second edition 1997-05-15 Reinforcement products - Determination of moisture content Produits de renfort-Détermination du taux d'humidite ISO Reference number ISO3344:1997(E) ISO3344:1997(E) Foreword IsO(theInternational OrganizationforStandardization)isa worldwidefederationof national standardsbodies(isO committees. Each member body interested in a subject for which a technical committee has been established has 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. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote International Standard ISO 3344 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 13. Composites and reinforcement fibres. This second edition cancels and replaces the first edition (isO 3344:1977), which has been technically revised. ISO1997 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 the publisher. International Organization for Standardization Casepostale56·CH-1211Geneve20·Switzerland Internet [email protected] X.400 C=ch; a=400net; p=iso; O=isocs; S=central Printed in Switzerland ISO 3344:1997(E) INTERNATIONALSTANDARD ISO Reinforcement products -- Determination of moisture content 1 Scope This International Standard specifies a method for the determination of the moisture content of reinforcement products, such as continuous-filament yarn, staple-fibre yarn, rovings, chopped strands, mats, fabrics and other forms of reinforcement made from textile glass, carbon or aramid fibres. 2 Normative reference The following standard contains provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the edition indicated was 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 edition of the standard indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. Iso 291:-", Plastics -Standardatmospheres for conditioning and testing. 3 Definition For the purposes of this International Standard, the following definition applies: 3.1 moisture content: The mass of water contained in a product, determined by a specified method and expressed as a percentage ofthemass of themoistproduct. 4 Principle A test specimen is weighed at ambient temperature, before and after drying at a temperature of 105 °C. 5 Apparatus temperature of 105 °C ± 3 °C or the chosen temperature to within ± 3 °C (see clause 4). 5.2 Desiccator, containing a suitable drying agent (for example silica gel, calcium chloride or phosphorus pentoxide). 5.3 Specimen holder, made of heat-resistant material, allowing the maximum air flow round the specimen and from which there is no loss of material. This may be a porcelain crucible, an unoxidisable metal wire basket, etc. NOTE One holder may be used to hold several specimens if they can be transferred from the holder to the oven without lossofmaterial. 1) To be published. (Revision of ISO 291:1977)