ISO 24180:2021

Textiles - Synthetic filament yarns - Electrostatic propensity evaluation by measuring electrical resistance

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.

Textiles — Fils de filaments synthétiques — Évaluation de la propension électrostatique par mesure de la résistance électrique

General Information

• Status: Published
• Publication Date: 16-Dec-2021
• ICS: 59.080.20 - Yarns
• Technical Committee: ISO/TC 38/SC 23 - Fibres and yarns
• Drafting Committee: ISO/TC 38/SC 23/WG 6 - Fibres - Man-made
• Current Stage: 6060 - International Standard published
• Start Date: 17-Dec-2021
• Due Date: 19-Jun-2022
• Completion Date: 17-Dec-2021

Overview

ISO 24180:2021 - Textiles - Synthetic filament yarns - Electrostatic propensity evaluation by measuring electrical resistance - defines a laboratory method to evaluate the electrostatic behaviour of synthetic filament yarns by measuring their electrical resistance. The standard covers test specimen preparation, conditioning, apparatus, test procedure, calculation of resistance per unit length and volume resistivity, precision, and reporting. It applies to synthetic filament yarns that include conductive components intended for anti‑static fabrics (not for power, signal transmission, electromagnetic shielding or heating).

Key topics and technical requirements

• Scope and limits: Applies only to synthetic filament yarns used for anti‑static purposes; excludes yarns intended for electrical power, signal transmission, shielding or heating.
• Atmosphere for conditioning/testing: Tests are performed at controlled conditions (nominally 20 ± 2 °C and 40 ± 4 % RH) in line with ISO 139.
• Specimen preparation:
  • Cut yarn specimens typically 400–500 mm long.
  • Minimum three specimens per package; ≥30 specimens when assessing resistance non‑uniformity.
  • Pre‑conditioning and conditioning steps specified (per ISO 139).
• Apparatus:
  • DC high‑resistance meter with defined measurement accuracy and open‑circuit voltage.
  • Insulating specimen holder with two copper clamps and a pulley; clamp spacing specified (10 ± 0.1 cm).
  • Tensioning weight to apply reproducible yarn tension.
• Tensioning:
  • Tension per unit linear density is prescribed for non‑textured and textured yarns (different cN/dtex values), and actual tension is calculated from yarn linear density (ISO 2060).
• Measurements and calculations:
  • Measure electrical resistance between clamps after energizing the meter (voltage typically 100 V) and reading after 1 minute.
  • Calculate resistance per unit length (Ω/m) and volume resistivity (Ω·m) from measured resistance, clamp spacing, yarn linear density and fibre density (Annex A provides typical fibre densities).
  • Results reported as arithmetic or geometric mean (scientific notation), with precision criteria given in Annex B.
• Test report: Must include standard reference, sample identification, conditions, results, deviations, and date.

Applications

• Quality control and acceptance testing for anti‑static yarns and fabrics.
• R&D and product development of conductive/anti‑static textiles.
• Supplier verification and material specification compliance for industries requiring electrostatic control (e.g., electronics, cleanrooms, packaging for ESD‑sensitive components).
• Certification and regulatory documentation where electrostatic propensity data are required.

Who should use this standard

• Textile manufacturers and yarn producers
• Textile testing laboratories and QA/QC teams
• Product developers and material engineers working on anti‑static textiles
• Procurement and compliance officers specifying electrostatic performance

Related standards

• ISO 139 - Standard atmospheres for conditioning and testing
• ISO 2060 - Yarn linear density (dtex) by skein method
• ISO 1183‑2 - Density measurement methods (referenced for fibre density)
• ISO 5725‑2 - Precision assessment (referenced in Annex B)

Keywords: ISO 24180:2021, synthetic filament yarns, electrostatic propensity, electrical resistance, volume resistivity, anti‑static yarn testing, textile testing, yarn conditioning.

Standards Content (Sample)

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
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
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Phone: [phone]
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Published in Switzerland
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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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
complete listing of these bodies can be found at www.iso.org/members.html.
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
...