prEN ISO 2440
(Main)Flexible and rigid cellular polymeric materials - Accelerated ageing tests (ISO/DIS 2440:2024)
Flexible and rigid cellular polymeric materials - Accelerated ageing tests (ISO/DIS 2440:2024)
This document 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 can 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.
If desired, the ageing conditions contained in this document can be applied to composite structures containing any of the above types of cellular material. This can be helpful in the investigation of possible interactions between cellular materials and other substrates. Composite constructions can be in the form of complete finished products or representative small specimens cut there-from.
Weich-elastische polymere Schaumstoffe und Hartschäume - Schnellalterungsprüfung (ISO/DIS 2440:2024)
Matériaux polymères alvéolaires souples et rigides - Essais de vieillissement accéléré (ISO/DIS 2440:2024)
Le présent document spécifie, pour les matériaux polymères alvéolaires souples et rigides, des méthodes de laboratoire qui ont pour but de reproduire les effets des réactions se produisant naturellement, telles que l'oxydation ou l'hydrolyse causées par l'humidité. Les caractéristiques physiques considérées sont mesurées avant et après l'application des traitements spécifiés.
Les conditions d'essai sont données uniquement pour le latex à alvéoles ouverts, les mousses de polyuréthanne à alvéoles ouverts et fermés, et les mousses de polyoléfine à alvéoles fermés. Les conditions pour les autres matériaux seront ajoutées suivant les besoins.
L'effet des méthodes de vieillissement sur l'une quelconque des caractéristiques physiques du matériau peut être examiné, mais celles qui sont normalement vérifiées par les essais sont les caractéristiques d'allongement et de traction ou les caractéristiques de compression ou de dureté par indentation.
Ces essais ne sont pas nécessairement en corrélation, soit avec le comportement en utilisation, soit avec le vieillissement par exposition à la lumière.
Si cela est souhaité, les conditions de vieillissement contenues dans le présent document peuvent être appliquées à des structures composites contenant l'un des types de matériaux alvéolaires ci-dessus. Cela peut être utile dans la recherche des interactions possibles entre les matériaux alvéolaires et d'autres substrats. Les constructions composites peuvent être sous la forme de produits finis complets ou de petits échantillons représentatifs qui en seraient prélevés.
Prožni in penjeni polimerni materiali - Preskus s pospešenim staranjem (ISO/DIS 2440:2024)
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Standards Content (Sample)
SLOVENSKI STANDARD
01-september-2024
Prožni in penjeni polimerni materiali - Preskus s pospešenim staranjem (ISO/DIS
2440:2024)
Flexible and rigid cellular polymeric materials - Accelerated ageing tests (ISO/DIS
2440:2024)
Weich-elastische polymere Schaumstoffe und Hartschäume - Schnellalterungsprüfung
(ISO/DIS 2440:2024)
Matériaux polymères alvéolaires souples et rigides - Essais de vieillissement accéléré
(ISO/DIS 2440:2024)
Ta slovenski standard je istoveten z: prEN ISO 2440
ICS:
83.100 Penjeni polimeri Cellular materials
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
DRAFT
International
Standard
ISO/DIS 2440
ISO/TC 45/SC 4
Flexible and rigid cellular polymeric
Secretariat: DSM
materials — Accelerated ageing
Voting begins on:
tests
2024-07-01
Matériaux polymères alvéolaires souples et rigides — Essais de
Voting terminates on:
vieillissement accéléré
2024-09-23
ICS: 83.100
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
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RIGHTS OF WHICH THEY ARE AWARE AND TO
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Reference number
ISO/DIS 2440:2024(en)
DRAFT
ISO/DIS 2440:2024(en)
International
Standard
ISO/DIS 2440
ISO/TC 45/SC 4
Flexible and rigid cellular polymeric
Secretariat: DSM
materials — Accelerated ageing tests
Voting begins on:
Matériaux polymères alvéolaires souples et rigides — Essais de
vieillissement accéléré
Voting terminates on:
ICS: 83.100
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
© ISO 2024
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
STANDARDS MAY ON OCCASION HAVE TO
ISO/CEN PARALLEL PROCESSING
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BE CONSIDERED IN THE LIGHT OF THEIR
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Published in Switzerland Reference number
ISO/DIS 2440:2024(en)
ii
ISO/DIS 2440:2024(en)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Apparatus . 2
4.1 For dry heat ageing .2
4.2 For humidity ageing .2
4.3 For physical –property measurements .2
5 Test pieces . 2
5.1 Number, size and shape .2
5.2 Conditioning.2
6 Procedure . 2
6.1 General .2
6.2 Dry heat ageing .3
6.2.1 Temperature .3
6.2.2 Duration of ageing .3
6.3 Humidity ageing .3
6.3.1 Humidity .3
6.3.2 Temperatures and duration of ageing .3
6.4 Reconditioning.4
7 Calculation and expression of results . 4
7.1 Calculation .4
7.2 Validity .4
7.3 Expression of results . .4
8 Test report . 4
9 Precision Data . 5
Annex A (informative) Method for verification of the validity of ageing results . 6
Annex B (informative) Precision Data . 7
Bibliography .11
iii
ISO/DIS 2440:2024(en)
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 45, Rubber and rubber products, Subcommittee
SC 4, Products (others than hoses).
This fifth edition cancels and replaces the fourth edition (ISO 2440:2019) which has been technically revised.
The main changes are as follows:
— Adding a new Subclause 7.2 “Validity”;
— Adding a new Clause 9 “Precision Data”;
— Adding a Method for verification of the validity of ageing results in a new informative Annex A;
— Adding precision data in a new informative Annex B.
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
DRAFT International Standard ISO/DIS 2440:2024(en)
Flexible and rigid cellular polymeric materials — Accelerated
ageing tests
WARNING — Persons using this document should be familiar with normal laboratory practice. This
document 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 determine
the applicability of any other restrictions.
1 Scope
This document 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 can 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.
If desired, the ageing conditions contained in this document can be applied to composite structures
containing any of the above types of cellular material. This can be helpful in the investigation of possible
interactions between cellular materials and other substrates. Composite constructions can be in the form of
complete finished products or representative small specimens cut there-from.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their
...
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