Surface active agents -- Fabric conditioners -- Determination of antistatic performance

This document specifies a method for the determination of static electricity elimination (antistatic) performance. This document is applicable to fabric conditioners and antistatic agents. NOTE The differences between this document and some International Standards related to static electricity on textiles are listed in Annex B.

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Publication Date
12-Nov-2020
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INTERNATIONAL ISO
STANDARD 23324
First edition
2020-11
Surface active agents — Fabric
conditioners — Determination of
antistatic performance
Reference number
ISO 23324:2020(E)
ISO 2020
---------------------- Page: 1 ----------------------
ISO 23324:2020(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2020

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 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved
---------------------- Page: 2 ----------------------
ISO 23324:2020(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

4 Principle ........................................................................................................................................................................................................................ 1

5 Test fabric material ............................................................................................................................................................................................ 2

6 Apparatus and materials.............................................................................................................................................................................. 2

7 Procedure..................................................................................................................................................................................................................... 3

7.1 Preparation of test clothes ............................................................................................................................................................ 3

7.1.1 Washing of test clothes ............................................................................................................................................... 3

7.1.2 Drying of test clothes ................................................................................................................................................... 3

7.2 Preparation of conditioner solution ..................................................................................................................................... 4

7.3 Measurement of surface resistance ...................................................................................................................................... 4

7.3.1 Measurement conditions .......................................................................................................................................... 4

7.3.2 Measurement of surface resistance ................................................................................................................. 4

8 Expression of results ........................................................................................................................................................................................ 4

8.1 Method of calculation ........................................................................................................................................................................ 4

8.1.1 Fabric surface resistance (R ) ............................................................................................................................... 4

8.1.2 Fabric surface resistance coefficient (ρ ) ................................................................................................... 4

8.1.3 Decrease of fabric surface resistance coefficient (Δρ ) .................................................................. 5

8.1.4 Decrease of the logarithm of fabric surface resistance coefficient (Δlgρ ) .................... 5

8.2 Expression of results .......................................................................................................................................................................... 5

9 Test report ................................................................................................................................................................................................................... 5

Annex A (informative) Technical specifications for speed controller ............................................................................... 7

Annex B (informative) ........................................................................................................................................................................................................ 9

Bibliography .............................................................................................................................................................................................................................12

© ISO 2020 – All rights reserved iii
---------------------- Page: 3 ----------------------
ISO 23324:2020(E)
Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards

bodies (ISO member bodies). The work of preparing International Standards is normally carried out

through ISO technical committees. Each member body interested in a subject for which a technical

committee has been established has the right to be represented on that committee. International

organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.

ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of

electrotechnical standardization.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the

different types of ISO documents should be noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www .iso .org/ patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to the

World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www .iso .org/

iso/ foreword .html.

This document was prepared by Technical Committee ISO/TC 91 Surface active agents.

Any feedback or questions on this document should be directed to the user’s national standards body. A

complete listing of these bodies can be found at www .iso .org/ members .html.
iv © ISO 2020 – All rights reserved
---------------------- Page: 4 ----------------------
INTERNATIONAL STANDARD ISO 23324:2020(E)
Surface active agents — Fabric conditioners —
Determination of antistatic performance
1 Scope

This document specifies a method for the determination of static electricity elimination (antistatic)

performance.
This document is applicable to fabric conditioners and antistatic agents.

NOTE The differences between this document and some International Standards related to static electricity

on textiles are listed in Annex B.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
3.1
fabric surface resistance
resistance measured when electric current flows through the surface of fabric
3.2
fabric surface resistance coefficient

surface resistance measured by two electrodes of unit length placed on the fabric surface with the

distance of unit length between them
Note 1 to entry: Unit length is expressed in centimetres.
3.3
antistatic agent
product used to treat fabric for eliminating static electricity
3.4
fabric conditioner

product with both antistatic and softening function, which generally contains cationic surface

active agents
4 Principle

The electrostatic effect of fabric is subject to not only the amount of static electricity generated, but

also the dissipation capacity of electrostatic charge. The fabric surface resistance is a physical quantity

characterizing the electrostatic charge attenuation velocity of fabric. Soak the test fabric material in

© ISO 2020 – All rights reserved 1
---------------------- Page: 5 ----------------------
ISO 23324:2020(E)

fabric conditioner solution under specified conditions. Measure the surface resistance of the test fabric

material with ultra-high resistance meter before and after soaking. Assess the antistatic performance

for fabric conditioner with the decrease of the surface resistance coefficient (Δρ ) or the decrease of the

logarithm of the surface resistance coefficient (Δlgρ ).
5 Test fabric material

5.1 Polyester, white or milky woven twill, with warp 428 threads per decimetre and weft 242 threads

per decimetre.

Polyester of other specifications or cloth of other textures can be used. However, only the comparative

test result of antistatic performance for different fabric conditioners can be provided, which shall be

included in the test report.
6 Apparatus and materials

6.1 Digital ultra-high resistance meter, with three coaxial electrodes and measuring range from

3 16

1 × 10 Ω to 1 × 10 Ω. The intrinsic error within limits shall not exceed 10 % of the indicated value.

The pressure that the electrodes press on sample shall be 100 g/cm . Structure size of coaxial-electrode

system is shown in Figure 1.
Dimensions in millimetres
Key
1 measuring electrode
2 shield electrode
3 test sample
4 high-voltage electrode
D inner diameter of the circular shield electrode
d diameter of the measuring electrode
Figure 1 — Coaxial-electrode system
6.2 Oven, regulated at a temperature of (45 ± 2) °C.

6.3 Humidistat. A glass desiccator containing potassium carbonate-saturated solution can be used.

The relative humidity (RH) of air at equilibrium shall be 43 % for a temperature between 10 °C and 30 °C.

2 © ISO 2020 – All rights reserved
---------------------- Page: 6 ----------------------
ISO 23324:2020(E)

6.4 Vegetable dehydrator (see Figure 2). Diameter of the upper rim of outer basket shall be (26 ± 3)

cm, and the height shall be (17 ± 2) cm.
a) Overall photo b) Top cover c) Bottom basket
Figure 2 — Vegetable dehydrator

6.5 Speed controller (optional), for use with the vegetable dehydrator (6.4). See Annex A.

6.6 Soap flakes, neat soaps, soap powder or soap base, with dried sodium soap content ≥ 54 %.

6.7 Miscellaneous tools, scissors, ruler, filter paper, plastic tweezers, plastic clip and thermometer.

7 Procedure
7.1 Preparation of test clothes
7.1.1 Washing of test clothes

Cut 10 cm selvage off the polyester fabric, then cut it into 100 mm × 100 mm test clothes.

Dissolve soap flakes (6.6) in distilled water or deionized water to obtain a soap solution with a

concentration of 1g/l of dried sodium soap.
...

DRAFT INTERNATIONAL STANDARD
ISO/DIS 23324
ISO/TC 91 Secretariat: ISIRI
Voting begins on: Voting terminates on:
2020-02-14 2020-05-08
Surface active agents — Fabric conditioners —
Determination of antistatic performance
ICS: 71.100.40
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
This document is circulated as received from the committee secretariat.
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 23324:2020(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION. ISO 2020
---------------------- Page: 1 ----------------------
ISO/DIS 23324:2020(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2020

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 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved
---------------------- Page: 2 ----------------------
ISO/DIS 23324:2020(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

4 Principle ........................................................................................................................................................................................................................ 1

5 Material .......................................................................................................................................................................................................................... 2

6 Apparatus ..................................................................................................................................................................................................................... 2

7 Procedure..................................................................................................................................................................................................................... 3

7.1 Preparation of test clothes ............................................................................................................................................................ 3

7.1.1 Washing of test clothes ............................................................................................................................................... 3

7.1.2 Drying of test clothes ................................................................................................................................................... 3

7.2 Preparation of conditioner solution ..................................................................................................................................... 3

7.3 Measurement of surface resistance ...................................................................................................................................... 4

7.3.1 measurement conditions .......................................................................................................................................... 4

7.3.2 Preparation of ultra-high resistance meter .............................................................................................. 4

7.3.3 Measurement of surface resistance ................................................................................................................. 4

8 Expression of results ........................................................................................................................................................................................ 4

8.1 Method of calculation ........................................................................................................................................................................ 4

8.1.1 Fabric surface resistance (R ) ............................................................................................................................... 4

8.1.2 Fabric surface resistance coefficient (ρ ) ................................................................................................... 4

8.1.3 Decrease of fabric surface resistance coefficient (Δρ ) .................................................................. 5

8.1.4 Decrease of fabric surface resistance coefficient (Δρ ) .................................................................. 5

8.2 Expression of results .......................................................................................................................................................................... 5

9 Test report ................................................................................................................................................................................................................... 5

Annex A (normative) Technical Requirements for Speed Controller ................................................................................. 7

Annex B (informative) ........................................................................................................................................................................................................ 9

Bibliography .............................................................................................................................................................................................................................12

© ISO 2020 – All rights reserved iii
---------------------- Page: 3 ----------------------
ISO/DIS 23324:2020(E)
Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards

bodies (ISO member bodies). The work of preparing International Standards is normally carried out

through ISO technical committees. Each member body interested in a subject for which a technical

committee has been established has the right to be represented on that committee. International

organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.

ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of

electrotechnical standardization.

International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.

The main task of technical committees is to prepare International Standards. Draft International

Standards adopted by the technical committees are circulated to the member bodies for voting.

Publication as an International Standard requires approval by at least 75 % of the member bodies

casting a vote.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. ISO shall not be held responsible for identifying any or all such patent rights.

ISO 23324 was prepared by Technical Committee ISO/TC 91 surface active agents.
iv © ISO 2020 – All rights reserved
---------------------- Page: 4 ----------------------
DRAFT INTERNATIONAL STANDARD ISO/DIS 23324:2020(E)
Surface active agents — Fabric conditioners —
Determination of antistatic performance
1 Scope

This document specifies a method for the determination of static electricity elimination performance

for fabric conditioners.

This document is applicable to assessment of static electricity elimination performance for fabric

conditioners and antistatic agents.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1 fabric electrostatic

relatively stable electric charges accumulating within or on the surface of fabric, created by some

external influences, such as friction
3.2 the fabric surface resistance (R )

the resistance measured when electric current flows through the surface of fabric

3.3 the fabric surface resistance coefficient (ρ )

the surface resistance of fabric measured with two electrodes placed on its surface, the length of the

two electrodes and the distance between them are unit length (cm).
3.4 antistatic agent
products used to treat fabric for eliminating static electricity
3.5 fabric conditioners

products of both antistatic and softening function, which generally contain cationic surface active agents

4 Principle

The electrostatic effect of fabric is subject to not only the amount of static electricity generated, but

also the dissipation capacity of electrostatic charge. The fabric surface resistance is a physical quantity

characterising the electrostatic charge attenuation velocity of fabric. Soak the polyester in fabric

conditioner solution under specified conditions. Measure the surface resistance of the polyester with

ultra-high resistance meter before and after soaking. Assess the antistatic performance for fabric

conditioner with the decrease of the surface resistance coefficient (△ρ ) or the decrease of the logarithm

of the surface resistance coefficient (△lgρ ).
© ISO 2020 – All rights reserved 1
---------------------- Page: 5 ----------------------
ISO/DIS 23324:2020(E)
5 Material

Polyester: white or milky woven twill. Warp - 428 threads per decimeter. Weft - 242 threads per

decimeter.

Note: Polyester of other specifications or cloth of other textures can be used. However, only the

comparative test result of antistatic performance for different fabric conditioners can be provided,

which shall be included in the test report.
6 Apparatus
6.1 Digital ultra-high resistance meter
3 16

Three coaxial electrodes. Measuring range: 1×10 Ω~1×10 Ω. The intrinsic error within limits shall

not exceed 10 % of the indicated value. The pressure that the electrodes press on sample is 100 g/cm .

Structure size of coaxial-electrode system, see Figure 1.
Note: Commercial instruments for ultra-high resistance meter
Key
1 measuring electrode
2 shield electrode
3 test sample
4 high-voltage electrode
Figure 1 — Coaxial-electrode system
6.2 Oven, controllable at (45± 2) C.

6.3 Humidistat. Glass desiccator that containing potassium carbonate-saturated solution can be used.

o o
The relative humidity (RH) of air after equilibrium is 43% at 10 C~30 C.
2 © ISO 2020 – All rights reserved
---------------------- Page: 6 ----------------------
ISO/DIS 23324:2020(E)

6.4 Vegetable dehydrator (see Figure 2). Diameter of the upper rim of outer basket is (26±3) cm, and

the height is (17±2) cm.
Figure 2 — Vegetable dehydrator

6.5 Speed controller (optional) for use with the vegetable dehydrator (6.4),see Annex A.

6.6 Other tools: scissors, ruler, filter paper, plastic tweezers, plastic clip and thermometer.

7 Procedure
7.1 Preparation of test clothes
7.1.1 Washing of test clothes

Cut 10 cm selvage off the polyester, then cut it into 100 mm × 100 mm test clothes.

Dissolve soap flakes (neat soaps, soap powder or soap base, with dried sodium soap content ≥ 54 %)

in distilled water or deionized water to make the concentration of dried sodium soap in soap solution

o o
1g/l. Keep the temperature between 40 C and 45 C.

Transfer 2 l of the soap solution to the vegetable dehydrator (6.4). Put 20 pieces of the 100 mm × 100

mm test clothes into it, cover and spin for 15 min. During the spinning, turn clockwise five times then

anticlockwise five times for 3 min at a speed of 18 r/min to 22 r/min under control or monitoring (6.5),

then stop for 2 min. Repeat 2 times. Discard the water and spin fast for 30 s.
o o

Transfer 2 l of 40 C to 45 C distilled water or deionized water to the vegetable dehydrator (6.4). Cover

and spin for 3 min. During the spinning, turn clockwise five times then anticlockwise five times. Discard

the water and spin fast for 30 s. Then, repeat the rinse 2 times.
7.1.2 Drying of test clothes
Pick the washed test clothes with plastic tweezers. Cl
...

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