IEC 63203-204-2:2025

Wearable electronic devices and technologies - Part 204-2: Electronic textile - Test method to characterize electrical resistance change in knee and elbow bending test of e-textiles

IEC 63203-204-2:2025 specifies a test method for e-textiles for measuring the change of electrical resistance during bending of the knee and elbow joints. It uses a dynamic method. This document is applicable to e-textiles.

Technologies et dispositifs électroniques prêts-à-porter - Partie 204-2: Textile électronique - Méthode d'essai pour caractériser la variation de la résistance électrique lors de l’essai de flexion du genou et du coude des textiles électroniques

L’IEC 63203-204-2:2025 spécifie une méthode d’essai pour les textiles électroniques (e-textiles) permettant de mesurer la variation de la résistance électrique lors de la flexion de l’articulation du genou et du coude. Elle met en œuvre une méthode dynamique. Le présent document s’applique aux e-textiles.

General Information

• Status: Published
• Publication Date: 13-Feb-2025
• ICS: 59.080.01 - Textiles in general
• ICS: 59.080.80 - Smart textiles
• Technical Committee: TC 124 - Wearable electronic devices and technologies
• Drafting Committee: WG 2 - TC 124/WG 2
• Current Stage: PPUB - Publication issued
• Start Date: 28-Feb-2025
• Due Date: 14-Feb-2025
• Completion Date: 14-Feb-2025

Standards Content (Sample)

IEC 63203-204-2 ®
Edition 1.0 2025-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Wearable electronic devices and technologies –
Part 204-2: Electronic textile – Test method to characterize electrical resistance
change in knee and elbow bending test of e-textiles
Technologies et dispositifs électroniques prêts-à-porter –
Partie 204-2: Textile électronique – Méthode d'essai pour caractériser la
variation de la résistance électrique lors de l’essai de flexion du genou et du
coude des textiles électroniques
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IEC 63203-204-2 ®
Edition 1.0 2025-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Wearable electronic devices and technologies –
Part 204-2: Electronic textile – Test method to characterize electrical resistance
change in knee and elbow bending test of e-textiles
Technologies et dispositifs électroniques prêts-à-porter –
Partie 204-2: Textile électronique – Méthode d'essai pour caractériser la
variation de la résistance électrique lors de l’essai de flexion du genou et du
coude des textiles électroniques
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 59.080.80, 59.080.01 ISBN 978-2-8327-0158-4
– 2 – IEC 63203-204-2:2025 © IEC 2025
CONTENTS
FOREWORD. 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Environmental conditions . 7
5 Test specimen preparation . 7
5.1 General . 7
5.2 Size of test specimen . 7
6 Testing method and test apparatus . 7
6.1 General . 7
6.2 Test apparatus . 8
6.2.1 General . 8
6.2.2 Preparation of e-textile specimens made with conductive fibre and
fabric . 9
6.2.3 Preparation of e-textile specimens with strip-type devices . 10
6.3 Test procedure . 10
6.4 Measurement . 11
6.5 Determination of the electrical properties . 11
6.5.1 General . 11
6.5.2 Linear resistance of e-textile with conductive yarn . 11
6.5.3 Average, standard deviation, and effective variation of resistance . 12
7 Test report . 13
Annex A (informative) Example of test results . 14
A.1 Knitted e-textile specimen . 14
A.2 Measurement example . 14
A.3 Measurement example . 15
A.4 Measurement example . 16
A.5 Measurement . 17
A.6 Conductive e-textile . 18
Annex B (informative) Strain along the bending . 19
Annex C (informative) Example of bending machine . 20
Annex D (normative) Specimen holder . 21
Annex E (informative) Preparation of e-textile test specimen . 23
Annex F (informative) Specimen holder separated from a dynamic bending machine . 25
Bibliography . 26

Figure 1 – Schematic diagram of specimen holder and specimen fixation . 8
Figure 2 – Apparatus for bending test . 8
Figure 3 – Example of bending test using apparatus . 9
Figure 4 – Embedded e-textile in the specimen. 9
Figure 5 – Strip-type device attached to specimen . 10
Figure 6 – Example of a graph of resistance variation from a bending test . 12
Figure A.1 – Part of knitted e-textile and schematic of bent specimen holder loaded
with the sleeve-type e-textile. . 14
Figure A.2 – Real-time measurement of resistance of knitted e-textile at 10 cpm . 15

Figure A.3 – Real-time measurement of resistance of knitted e-textile at 30 cpm . 16
Figure A.4 – Real-time measurement of resistance of knitted e-textile at 30 cpm . 16
Figure A.5 – Real-time measured change value of resistance of knitted e-textile
sensor at 50 cpm . 17
Figure A.6 – Real-time measured change value of resistance of electrical

interconnection using conductive e-textile embedded in fabric . 18
Figure B.1 – Bending strain between grips . 19
Figure D.1 – Blueprint of specimen holder at top . 21
Figure D.2 – Blueprint of specimen holder at front . 21
Figure D.3 – Blueprint of specimen holder at side . 22
Figure D.4 – Three-dimensional picture of the specimen holder . 22
Figure E.1 – E-textile test specimen before sewing . 23
Figure E.2 – E-textile test specimen after sewing . 23
Figure E.3 – Specimen holder covered with silicone . 24
Figure E.4 – E-textile loaded on a specimen holder covered with silicone . 24

Table 1 – List of the size of the specimen . 7
Table 2 – Combination of parameters for measurement . 10
Table 3 – Categories of number of bending cycles . 11
Table D.1 – Length of blueprint of specimen holder at top . 21
Table D.2 – Length of blueprint of specimen holder at front . 22
Table D.3 – Length of blueprint of specimen holder at side . 22
Table E.1 – Length of e-textile test specimen . 23

– 4 – IEC 63203-204-2:2025 © IEC 2025
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
WEARABLE ELECTRONIC DEVICES AND TECHNOLOGIES –

Part 204-2: Electronic textile – Test method to characterize electrical
resistance change in knee and elbow bending test of e-textiles

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
in addition to other activities, IEC publishes
...