ISO INTERNATIONAL STANDARD 7214 Fourth edition 2012-04-01 Cellular plastics Polyethylene Methods of test Plastiques alvéolaires Polyethylene Methodes d'essai Reference number ISO 7214:2012(E) ISO @ISO2012 No reproduction or networking permitted without license from IHS Not for Resale ISO 7214:2012(E) COPYRiGHTPROTECTEDDOCUMENT ISO 2012 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 copyright@iso.org Web www.iso.org Published in Switzerland @ ISO 2012 - All rights reserved No reproduction or networking permited without license from IHS Not for Resale ISO 7214:2012(E) Contents Page Foreword ..iv 1 Scope 2 Normative references 3 Test specimens. 2 4 Conditioning . 5 Atmosphere during test. 2 6 Measurement of dimensions. 2 7 Mandatory tests. 3 7.1 Apparent density 3 7.2 Compressive stress 3 7.3 Compression set 7.4 Tensile strength and elongation.... 7.5 Dimensional stability at elevated temperature 7.6 Waterabsorption. 7.7 Burning characteristics 8 Optional tests. 8.1 Dynamic cushioning performance 8.2 Compressive creep 5 8.3 Thermal conductivity. 6 8.4 Water-vapour transmission 6 8.5 Dynamic stiffness. 6 8.6 Cell count 6 8.7 Tear strength. 8.8 Permanent set after repeated compression. 9 Test report. Annex A (normative) Cell count procedure ili ed without license from IHS Not for Resale