Textiles -- Test methods for evaluating the electrostatic propensity of fabrics -- Part 3: Test method using manual friction

ISO 18080-3:2015 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.

General Information

Status
Published
Publication Date
10-Dec-2015
Technical Committee
Current Stage
PPUB - Publication issued
Completion Date
14-Dec-2015
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ISO 18080-3:2015 - Textiles -- Test methods for evaluating the electrostatic propensity of fabrics -- Part 3: Test method using manual friction
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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 18080-3:2015(E)
ISO 2015
---------------------- Page: 1 ----------------------
ISO 18080-3:2015(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2015, Published in Switzerland

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ii © ISO 2015 – All rights reserved
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ISO 18080-3:2015(E)
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

© ISO 2015 – All rights reserved iii
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ISO 18080-3:2015(E)
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
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ISO 18080-3:2015(E)
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.

© ISO 2015 – All rights reserved v
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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.
© ISO 2015 – All rights reserved 1
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ISO 18080-3:2015(E)
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
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ISO 18080-3:2015(E)
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.
© ISO 2015 – All rights reserved 3
850 ~ 1 000
750 ~ 950
...

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