ISO 18080-3:2015

INTERNATIONAL ISO
STANDARD 18080-3
First edition
2015-12-15
Textiles — Test methods for
evaluating the electrostatic
propensity of fabrics —
Part 3:
Test method using manual friction
Textiles — Méthodes d’essai pour l’évaluation de la propension des
étoffes électrostatique —
Partie 3: Méthode d’essai de friction manuelle
Reference number
©
ISO 2015
© ISO 2015, Published in Switzerland
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ii © ISO 2015 – All rights reserved

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 2
5 Conditioning and testing atmosphere . 2
6 Apparatus . 2
7 Preparation of specimen . 5
7.1 Sampling . 5
7.2 Cleansing . 5
7.2.1 General. 5
7.2.2 Wash by water . 5
7.2.3 Dry cleaning . 5
7.3 Conditioning of sample . 5
8 Testing method . 5
9 Test report . 9
Annex A (informative) Round robin test results .10
Bibliography .16
Foreword
ISO (the International Organization for Standardization) and IEC (the International Electrotechnical
Commission) are worldwide federations of national standards bodies (ISO member bodies and IEC
national committees). The work of preparing International Standards is normally carried out through
ISO and IEC 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 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 on the meaning of ISO specific terms and expressions related to conformity
assessment, as well as information about ISO’s adherence to the WTO principles in the Technical
Barriers to Trade (TBT) see the following URL: Foreword - Supplementary information
The committees responsible for this document are Technical Committee ISO/TC 38, Textiles and
IEC/TC 101 Electrostatics as JWG 26, Antistatic, in the lead of ISO/TC 38.
ISO 18080 consists of the following parts, under the general title of Textiles — Test methods for evaluating
the electrostatic propensity of fabrics:
— Part 1: Test method using corona charging
— Part 2: Test method using rotary mechanical friction
— Part 3: Test method using manual friction
— Part 4: Test method using horizontal mechanical friction
iv © ISO 2015 – All rights reserved

Introduction
In addition to safety hazards and damage or disruption of sensitive electronic devices and systems
which are covered by other International Standards, electrostatic charging of clothing can also cause
problems of clinging, uncomfortable shocks and the attraction of airborne dust and other contaminants.
Clothing designed to avoid airborne dust contamination is required in a number of expanding industries
relating to precision technology, biotechnology, food, hygiene, etc. It is also generally desirable to have
clothing that does not cling or cause uncomfortable shocks.
Test methods are required to evaluate the propensity of fabrics used to make clothing designed to avoid
problems associated with electrostatic charging. Test methods are specified in a number of National
and International Standards, including those published by ISO and IEC. However, the relationship
between measurable electrostatic properties and end use performance is rather complex and may
require a combination of different test methods depending on application.
The test method described in this International Standard for measuring charge density on the surface
of a textile generated by friction is one of a number of test methods that can be used to evaluate the
electrostatic propensity of textile materials. As the charge density generated depends on the textile
material, its surface condition, and the nature of the friction, the gentle friction action described can be
considered to simulate practical wearing conditions.
As with any manual test procedure, there is a certain operator dependence that cannot be eliminated.
Test results from different laboratories may differ by more than a factor of five.
INTERNATIONAL STANDARD ISO 18080-3:2015(E)
Textiles — Test methods for evaluating the electrostatic
propensity of fabrics —
Part 3:
Test method using manual friction
1 Scope
This part of ISO 18080 specifies a test method using manual friction with measurement of frictional
charge density on specimens of fabric. The test method is suitable for fabrics of all types of composition
and construction that are capable of withstanding frictional charging.
Some fabrics, e.g. fabrics of low strength or loose construction, may not be physically capable of
withstanding the manual friction used in this test method or may give false results. In such cases, the
test method described in ISO 18080-1 can be used to evaluate electrostatic propensity.
The test method described may not be suitable for evaluating garments and garment materials in
relation to safety of personnel and protection of electrostatic discharge sensitive devices.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
ISO 3175-2, Textiles — Professional care, drycleaning and wetcleaning of fabrics and garments — Part 2:
Procedure for testing performance when cleaning and finishing using tetrachloroethene
ISO 3175-3, Textiles — Professional care, drycleaning and wetcleaning of fabrics and garments — Part 3:
Procedure for testing performance when cleaning and finishing using hydrocarbon solvents
ISO 6330, Textiles — Domestic washing and drying procedures for textile testing
IEC 61340-5-1, Electrostatics — Part 5-1: Protection of electronic devices from electrostatic phenomena —
General requirements
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
antistatic
property of a material that reduces its propensity to acquire electrostatic charges or allows electrostatic
charges to dissipate quickly
3.2
conductive
providing a sufficiently high conductivity so that potential differences over any parts of a material or
object are not sufficiently large to be of practical significance
Note 1 to entry: In general, a conductive material has a resistance below about 10 Ω, but different standards may
define different resistance ranges for this term.
3.3
frictional charge density
quantity of charge per unit area on a fabric specimen generated by friction between the specimen and
other fabrics
4 Principle
A fabric specimen is charged by rubbing it by hand with another fabric. The quantity of charge generated
is measured using a Faraday pail test apparatus.
5 Conditioning and testing atmosphere
Unless otherwise agreed or specified, the atmosphere for conditioning and testing shall be a
temperature of (20 ± 2) °C and a relative humidity of (40 ± 4) %. If a different temperature or humidity
is used for conditioning or testing, record it in the test report.
NOTE For measurements, refer to ISO 139.
6 Apparatus
6.1 Testing apparatus, an example of the testing apparatus is composed of the following parts.
— Voltmeter, with a DC measurement range of ±(10 mV to 10 V) or larger, 5 % measuring accuracy,
and input resistance greater than 10 Ω.
— Faraday pail, the basic form of a Faraday pail system for measurement of charge is shown in Figure 1.
It consists of two concentric metal containers, the inner container being electrically insulated from
the outer which is connected to the ground. The latter is necessary to provide electrical shielding
from external fields and protection for the sensitive charge measuring system.
— Capacitor, added to the measuring circuit to limit the pail voltage to within the range of the voltmeter
used. A capacitor of 0,1 μF with a relative tolerance of ±2 % and insulation resistance greater than
10 Ω is suitable for the voltage measuring range shown above.
— Insulating spacer, made of fluoro-resin, acrylic resin or poly-carbonate resin, or other material
with insulation resistance of at least 1 × 10 Ω.
2 © ISO 2015 – All rights reserved

Dimensions in millimetres
 400 ~ 600
Key
1 Faraday pail
2 voltmeter
3 capacitor
4 insulating spacer
Figure 1 — Example of a charge quantity measuring apparatus
6.2 Rubbing fabric
Rubbing fabrics for this test are selected as follows:
2 2
— acrylic filaments, interlock knit using 3 stage bat: 200 g/m ± 15 g/m ;
2 2
— nylon filaments, interlock knit using 3 stage bat: 230 g/m ± 15 g/m ;
— if other rubbing fabrics are used, they shall be described in full detail in the test report.
6.3 Rubbing bar preparation
6.3.1 Prepare a hard polyvinyl chloride pipe with an outside diameter of 32 mm ± 0,2 mm, a nominal
thickness of 3,1 mm, and a nominal length of 400 mm.
A hard polyvinyl chloride pipe with the nearest dimension may be used for this test.
6.3.2 Prepare the nylon or acrylic rubbing fabric with a length of 500 mm ± 10 mm in the wale direction
and 450 mm ± 10 mm in the course direction.
6.3.3 Wind the rubbing fabric around the pipe (6.3.1) so that the entire 500 mm length of the rubbing
fabric is taken up around the pipe.
6.3.4 Stretch both ends and insert the extra length of rubbing fabric inside of the pipe to fix it inplace.
6.4 Base plate preparation
6.4.1 Prepare an aluminium plate with nominal dimensions of 320 mm × 300 mm and a thickness 3 mm.
6.4.2 Prepare the rubbing fabric as specified in 6.3.2 with nominal dimensions of 450 mm in the wale
direction and 400 mm in the course direction.
850 ~ 1 000
750 ~ 950
...