ISO INTERNATIONAL 9932 STANDARD Second edition 2021-03 PaperandboardDeterminationof water vapour transmission rate of sheet materials - Dynamic sweep and static gas methods Papier et carton-Deétermination du coefficientde transmission de la vapeur d'eau des materiauxen feuille-Methode dynamique par balayage de gaz et methode statique Reference number IS0 9932:2021(E) ISO @ ISO 2021 IS09932:2021(E) COPYRIGHTPROTECTEDDOCUMENT IS02021 All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either Iso at the address below or ISo's member body in the country of the requester. ISO copyright office CP 401 · Ch.de Blandonnet 8 CH-1214 Vernier,Geneva Phone: +41 22 749 0111 Email:[email protected] Website:www.iso.org Published in Switzerland ii IS02021-Allrightsreserved IS0 9932:2021(E) Contents Page Foreword iv Introduction. .V 1 Scope. .1 2 Normativereferences .1 3 Terms and definitions .1 4 Method A: Dynamic sweepgas method .1 4.1 Principle. 1 4.2 Apparatus 5 Method B: Static gas method. .3 5.1 Principle. 3 5.2 Apparatus 6 Sampling. 4 7 Preparation of test pieces 5 8 Procedure. 5 8.1 5 Method A 8.2 Method B 5 8.3 Barriermaterial having one faceofuncoatedpaper 5 8.4 Creased material. 6 9 Expression of results 6 Precision .6 10 10.1 General statementoftheprecision 6 10.2 Method A 6 .6 10.3 Method B 11 Testreport 6 AnnexA(normative)Saturatedsalinesolutions .7 .8 AnnexB (normative)Calibration AnnexC (informative)Comparison of dynamicmethod with gravimetric method .9 Bibliography 10 IS0 2021-All rights reserved ii