ISO 24180:2021

INTERNATIONAL ISO
STANDARD 24180
First edition
2021-12
Textiles — Synthetic filament yarns —
Electrostatic propensity evaluation by
measuring electrical resistance
Textiles — Fils de filaments synthétiques — Évaluation de la
propension électrostatique par mesure de la résistance électrique
Reference number
© ISO 2021
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ii
Contents  Page
Foreword .iv
1  Scope . 1
2  Normative references . 1
3  Terms and definitions . 1
4  Principle . 1
5  Apparatus . 2
5.1 DC high-resistance meter . . 2
5.2 Insulating specimen holder (see Figure 1) . 2
5.3 Tensioning weight . 2
6  Atmosphere for conditioning and testing . 2
7  Preparation of test specimens . 3
7.1 Preparation of specimens . 3
7.2 Conditoning . 3
7.2.1 Pre-conditioning . 3
7.2.2 Conditioning . 3
8  Test procedure .3
8.1 Tension for the test specimen . 3
8.2 Test specimen loading . 3
8.3 Determination of electrical resistance . 4
9  Calculation and expression of results . 4
9.1 Resistance per unit length . 4
9.2 Volume resistivity . 4
9.3 Expression of results . . 4
9.4 Precision . . . 5
10  Test report . 5
Annex A (informative) Average density of common synthetic fibres . 6
Annex B (informative) Precision experiments . 7
Bibliography . 9
iii
Foreword
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ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
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This document was prepared by Technical Committee ISO/TC 38, Textiles, Subcommittee SC 23, Fibres
and yarns.
Any feedback or questions on this document should be directed to the user’s national standards body. A
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iv
INTERNATIONAL STANDARD ISO 24180:2021(E)
Textiles — Synthetic filament yarns — Electrostatic
propensity evaluation by measuring electrical resistance
1  Scope
This document specifies methods for electrostatic propensity evaluation by measuring electrical
resistance of synthetic filament yarns.
It is applicable to synthetic filament yarns. Conductive yarns covered in this document are used for
anti-static fabric. They are not used for transmission of electric signals, supply of electric power and
electromagnetic shield and heating.
2  Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 139, Textiles — Standard atmospheres for conditioning and testing
ISO 2060, Textiles — Yarn from packages — Determination of linear density (mass per unit length) by the
skein method
3  Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
electrical resistance per unit length
electrical resistance of a material per unit length
Note 1 to entry: It is expressed in Ω/m.
3.2
...