ISO INTERNATIONAL STANDARD 14679 First edition 1997-09-15 Adhesives Measurement of adhesion characteristics by a three-point bending method Adhésifs - Détermination des caracteristiques d'adhesion par une methode deflexiona troispoints ISO Reference number ISO 14679:1997(E) No reproduction or networking permitted without license from IHS Not for Resale ISO 14679:1997(E) Foreword IsO (the International Organization for s Standardization) 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. 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- 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. Publication as an International a vote. International Standard ISO 14679 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 11, Products. It is technically similar but not identical to ENV 1966:1995. @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 Case postale 56 . CH-1211 Geneve 20 . Switzerland Internet [email protected] X.400 C=ch; a=400net; p=iso; 0=isocs; s=central Printed in Switzerland Not for Resale INTERNATIONAL STANDARD ISO ISO 14679:1997(E) Adhesives -- Measurement of adhesion characteristics by a three-point bending method 1 Scope This International Standard specifies a test method to determine the ability of a cured adhesive (if necessary with a primer) to adhere to a substrate with a certain surface finish, or which has been subjected to a specific surface preparation, using the “three-point bending method". This standard is only applicable to quality assurance and only to substrates which are rigid or resistant enough to bending, such as steel or aluminium alloys. For other substrates, the thickness is adjusted to the modulus of elasticity or a suitable stiffener is used. The adhesive is allowed to cure without the application of pressure in order to obtain the thickness needed to provide sufficient rigidity, otherwise a bonded reinforcing piece of the same material and the same thickness as the substrate is substituted for the block of adhesive. This test method is not suitable for film adhesives. 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 286-1:1988, ISO system of limits and fits - Part 1: Bases of tolerances, deviations and fits. ISO 4588:1995, Adhesives - Guidelines for the surface preparation of metals. ISO 9142:1990, Adhesives - Guide to the selection of standard laboratory ageing conditions for testing bonded joints. No reproduction or networking permitted without license from IH Not for Resale