EN ISO 3915:2022

SLOVENSKI STANDARD
01-maj-2022
Nadomešča:
SIST EN ISO 3915:2000
Polimerni materiali - Merjenje upornosti prevodnih polimernih materialov (ISO
3915:2022)
Plastics - Measurement of resistivity of conductive plastics (ISO 3915:2022)
Kunststoffe - Messung des spezifischen elektrischen Widerstands von leitfähigen
Kunststoffen (ISO 3915:2022)
Plastiques - Mesurage de la résistivité des plastiques conducteurs (ISO 3915:2022)
Ta slovenski standard je istoveten z: EN ISO 3915:2022
ICS:
83.080.01 Polimerni materiali na Plastics in general
splošno
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 3915
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2022
EUROPÄISCHE NORM
ICS 83.080.01 Supersedes EN ISO 3915:1999
English Version
Plastics - Measurement of resistivity of conductive plastics
(ISO 3915:2022)
Plastiques - Mesurage de la résistivité des plastiques Kunststoffe - Messung des spezifischen elektrischen
conducteurs (ISO 3915:2022) Widerstands von leitfähigen Kunststoffen (ISO
3915:2022)
This European Standard was approved by CEN on 12 February 2022.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 3915:2022 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 3915:2022) has been prepared by Technical Committee ISO/TC 61 "Plastics" in
collaboration with Technical Committee CEN/TC 249 “Plastics” the secretariat of which is held by NBN.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by September 2022, and conflicting national standards
shall be withdrawn at the latest by September 2022.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 3915:1999.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the
United Kingdom.
Endorsement notice
The text of ISO 3915:2022 has been approved by CEN as EN ISO 3915:2022 without any modification.

INTERNATIONAL ISO
STANDARD 3915
Second edition
2022-02
Plastics — Measurement of resistivity
of conductive plastics
Plastiques — Mesurage de la résistivité des plastiques conducteurs
Reference number
ISO 3915:2022(E)
ISO 3915:2022(E)
© ISO 2022
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 3915:2022(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Apparatus . 1
6 Specimen . 3
7 Number of specimens . .4
8 Procedure .4
9 Expression of results . 4
10 Test report . 5
Bibliography . 6
iii
ISO 3915:2022(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 61, Plastics, Subcommittee SC 5, Physical-
chemical properties, in collaboration with the European Committee for Standardization (CEN) Technical
Committee CEN/TC 249, Plastics, in accordance with the Agreement on technical cooperation between
ISO and CEN (Vienna Agreement).
This second edition cancels and replaces the first edition (ISO 3915:1981), which has been technically
revised.
The main changes compared to the previous edition are as follows:
— the apparatus specifications have been revised;
— the document has been editorially revised.
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 3915:2022(E)
Introduction
0.1 General
The method specified in this document is technically similar to that specified for rubber in ISO 1853.
However, it differs from that method in certain details, especially those associated with the greater
stiffness of the plastic samples, and in particular in the limitation on specimen width. It takes into
account two problems encountered in the measurement of resistivity of conductive plastics, namely
the sensitivity of these materials to their temperature-history and strain-history, and the difficulty of
making adequate electrical contact with them.
The prescribed width of the specimen is mandatory for reference purposes; however, a wider strip may
be used, with correspondingly wider electrodes. There is a danger in using a wide strip, if the strip is
slightly twisted and at the same time somewhat non-uniform in its resistivity. It is then possible to
obtain erroneous results; the potential electrode nearer to the positive current electrode can even be
found to be negative with respect to the other potential electrode.
0.2 Effect of temperature changes and strain on conductive plastics
As mentioned, the resistance of these materials is sensitive to their temperature-history and strain-
history. The relationships are complex and arise from the kinetic energy and structural configuration
of the carbon particles in the polymer.
The resistivity may be increased by the effects of strain produced by (or subsequent to) removal from
the mould, and a treatment is described for reducing specimens to a constant strain and temperature
condition before measurements are carried out on them. Specimens are also cut in two perpendicular
directions to assess anisotropy.
0.3 Electrode systems (see 5.3)
Certain types of electrode, when applied to these polymers, have a contact resistance which can be
many thousand times greater than the intrinsic resistance of the specimen. Dry contacts under light
pressure or point contacts give very high resistances. However, the present test method eliminates the
effects of contact resistances unless these are excessively high. (In such a case, no result, rather than a
wrong one, is generally obtained.)
v
INTERNATIONAL STANDARD ISO 3915:2022(E)
Plastics — Measurement of resistivity of conductive
plastics
1 Scope
This document specifies the requirements for the laboratory testing of the resistivity of specially
prepared specimens of plastics rendered conductive by the inclusion of conductive fillers or suitable
modification of the structure. The test is applicable to materials of resistivity less than 10 Ω⋅cm
(10 Ω⋅m).
The result is not strictly a volume resistivity, because of surface conduction, but the effects of the latter
are generally negligible.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
No terms and definitions are listed in this document.
ISO an
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