SIST EN ISO 2440:2000

SLOVENSKI STANDARD
SIST EN ISO 2440:2000
01-december-2000
Polimerni materiali - Mehke in trde pene - Preskus s pospešenim staranjem (ISO
2440:1997)
Flexible and rigid cellular polymeric materials - Accelerated ageing tests (ISO 2440:1997)
Weich- und Hartschaumstoffe - Schnellalterungsprüfung (ISO 2440:1997)
Matériaux polymeres alvéolaires souples et rigides - Essais de vieillissement accéléré
(ISO 2440:1997)
Ta slovenski standard je istoveten z: EN ISO 2440:1999
ICS:
83.100 Penjeni polimeri Cellular materials
SIST EN ISO 2440:2000 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 2440:2000

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SIST EN ISO 2440:2000

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SIST EN ISO 2440:2000

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SIST EN ISO 2440:2000
INTERNATIONAL IS0
STANDARD 2440
Third edition
1997-09-l 5
Flexible and rigid cellular polymeric
materials - Accelerated ageing tests
Mathriaux polymhres alv6olaires soup/es et rigides - Essais
de vieillissement acc&l&S
Reference number
IS0 2440:1997(E)

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SIST EN ISO 2440:2000
IS0 2440: 1997(E)
IS0 (the International Organization for Standardization) is a worldwide federation of national standards bodies (IS0
member bodies). The work of preparing International Standards is normally carried out through IS0 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. IS0 collaborates closely with the International Electrotechnical
Commission (IEC) on all matters of electrotechnical standardization.
Draft International Standards adopted by the technical committees are circulated to the member bodies for voting.
Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote.
International Standard IS0 2440 was prepared by Technical Committee ISO/TC 45, Rubber and rubber products.
This third edition cancels and replaces the second edition (IS0 2440:1983), which has been technically revised.
0 IS0 1997
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced
or utilized in any form or by any means, electronic or mechanical, including photocopying and
microfilm, without permission in writing from the publisher.
International Organization for Standardization
Case postale 56 l CH-1211 Geneve 20 l Switzerland
Internet central @ isocs.iso.ch
x.400
c=ch; a=4OOnet; p=iso; o=isocs; s=central
Printed in Switzerland
ii

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SIST EN ISO 2440:2000
IS0 2440:1997(E)
INTERNATIONAL STANDARD o IS0
Flexible and rigid cellular polymeric materials - Accelerated ageing
tests
WARNING - Persons using this International Standard should be familiar with normal laboratory practice.
This standard does not purport to address all of the safety problems, if any, associated with its use. It is the
responsibility of the user to establish appropriate safety and health practices and to ensure compliance
with any national regulatory conditions.
1 Scope
This International Standard specifies, for flexible and rigid cellular polymeric materials, laboratory procedures which
are intended to imitate the effects of naturally occurring reactions such as oxidation or hydrolysis by humidity. The
physical properties of interest are measured before and after the application of the specified treatments.
Test conditions are only given for open cellular latex, both open- and closed-cell polyurethane foams, and
closed-cell polyolefin foams. Conditions for other materials will be added as required.
The effect of the ageing procedures on any of the physical properties of the material may be examined, but those
normally tested are either the elongation and tensile properties, or the compression or indentation hardness
properties.
These tests do not necessarily correlate either with service behaviour or with ageing by exposure to light.
2 Normative reference
The following standard contains provisions which, through reference in this text, constitute provisions of this
International Standard. At the time of publication, the edition indicated was valid. All standards are subject to
revision, and parties to agreements based on this International Standard are encouraged to investigate the
possibility of applying the most recent edition of the standard indicated below. Members of IEC and IS0 maintain
registers of currently valid International Standards.
IS0 471 :1995, Rubber - Temperatures, humidities and times for conditioning and testing.
3 Apparatus
3.1 For heat ageing
3.1.1 Oven, with forced circulation, capable of maintaining the required temperature to within +l “C.
NOTE - It is recommended that a device be used to record the temperature, preferably continuously.
3.2 For humidity ageing
3.2.1 Ageing apparatus, of such a size that the total volume of the test pieces does not exceed 10 % of the free
air space, and such that the test pieces are free of strain, freely exposed to the ageing atmosphere on all sides and
not exposed to light.
3.2.2 Steam autoclave or similar vessel, capable of mainta
...