ISO INTERNATIONAL STANDARD 15023-1 Second edition 2017-03 Plastics Poly(vinyl alcohol) (PVAL) materials - Part 1: Designation system and basis for specifications Plastiques - Matériaux en poly(alcool de vinyle) (PVAL) - Partie 1: Systeme de désignation et base de specifications Reference number ISO 15023-1:2017(E) so International Organization for Standardization @ IS0 2017 ZHEJIANG INST OF STANDARDIZATION C15956617 ed without license from IHS IS0 15023-1:2017(E) COPYRIGHTPROTECTEDDOCUMENT IS02017,PublishedinSwitzerland All rights reserved. Unless otherwise specified, 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 Ch. de Blandonnet 8 . CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax+412274909 47 copyright@iso.org www.iso.org Intenationai br PrganizationforStandardization icensee-ZHEJIANG INST.OF STANDARDIZRoISQ s1.7 - All rights reserved I by IHS unde etworking permitted without license from IHS IS0 15023-1:2017(E) Contents Page Foreword ..iv 1 Scope ..1 2 Normative references 3 Terms and definitions 4 Designation system 2 4.1 General 2 4.2 Data block 1 .2 4.3 Data block 2 2 4.4 Data block3 .3 4.5 Datablock4 4 4.5.1 General 4.5.2 Degree of hydrolysis . 4 4.5.3 Viscosity of 4 % aqueous solution .5 4.6 Data block 5 .6 5 Examples of designations .6 Bibliography 7 iii ISee=ZHEJIANG INST OF STANDARDIZATION C1 5956617 vided by IHS under lic ed without license from IHS Not for Resale, 2017/5/16 00:48:03