ISO INTERNATIONAL STANDARD 20932-1 Firstedition 2018-11 Textiles Determination of the elasticity of fabrics - Part 1: Strip tests Textiles - Détermination de I'élasticité des étoffes - Partie 1: Essais sur bande Reference number ISO 20932-1:2018(E) ISO @IS02018 IS0 20932-1:2018(E) COPYRIGHTPROTECTEDDOCUMENT @ IS0 2018 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: +4122 749 0111 Fax: +41 22 749 09 47 Email: [email protected] Website: www.iso.org Published in Switzerland ii @ IS0 2018 - All rights reserved IS0 20932-1:2018(E) Contents Page Foreword ..iv Introduction. ..V 1 Scope. ..1 2 Normative references ..1 3 Terms and definitions ..1 4 Principle .3 5 Sampling. ..3 6 Apparatus 7 Atmosphere for conditioning and testing .5 8 Preparation of test specimens. .5 8.1 General .5 8.2 Test specimen preparation .5 8.2.1 Woven fabrics .5 8.2.2 Knitted fabrics .6 8.2.3 Nonwoven fabrics .7 9 Procedure .8 9.1 Woven and nonwoven fabrics (other than knitted) .8 9.1.1 Method A - Strip test specimens .8 9.1.2 MethodB- Looptest specimens .8 9.2 Knitted fabrics .8 9.2.1 Method A- Strip test specimens 9.2.2 Method B - Loop test specimens 9 9.3 Operation .9 10 Recording. .10 11 Expressions and calculations of test results. ..10 12 Test report ..11 Annex A (informative) Example of a typical cycling graph ..13 Annex B (informative) Procedure for sampling ..14 Annex C (informative) Clamping and holding devices ..15 Annex D (informative) Example of a pattern for cutting test specimens from a laboratory sample. ..17 Bibliography. .18 @ IS0 2018 - All rights reserved iii