SIST EN ISO 3386-1:2025

SLOVENSKI STANDARD
01-september-2025
Polimerni materiali, mehke pene - Določanje diagrama napetost/raztezek - 1. del:
Materiali z nizko gostoto (ISO 3386-1:2025)
Polymeric materials, cellular flexible - Determination of stress-strain characteristics in
compression - Part 1: Low-density materials (ISO 3386-1:2025)
Polymere Materialien, weich-elastische Schaumstoffe - Bestimmung der
Druckspannungs-Verformungseigenschaften - Teil 1: Materialien mit niedriger Dichte
(ISO 3386-1:2025)
Matériaux polymères alvéolaires souples - Détermination de la caractéristique de
contrainte-déformation relative en compression - Partie 1: Matériaux à basse masse
volumique (ISO 3386-1:2025)
Ta slovenski standard je istoveten z: EN ISO 3386-1:2025
ICS:
83.100 Penjeni polimeri Cellular materials
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 3386-1
EUROPEAN STANDARD
NORME EUROPÉENNE
July 2025
EUROPÄISCHE NORM
ICS 83.100 Supersedes EN ISO 3386-1:1997, EN ISO 3386-
1:1997/A1:2010
English Version
Polymeric materials, cellular flexible - Determination of
stress-strain characteristics in compression - Part 1: Low-
density materials (ISO 3386-1:2025)
Matériaux polymères alvéolaires souples - Polymere Materialien, weich-elastische Schaumstoffe -
Détermination de la caractéristique de contrainte- Bestimmung der Druckspannungs-
déformation relative en compression - Partie 1: Verformungseigenschaften - Teil 1: Materialien mit
Matériaux à basse masse volumique (ISO 3386-1:2025) niedriger Dichte (ISO 3386-1:2025)
This European Standard was approved by CEN on 27 June 2025.

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, Türkiye 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
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 3386-1:2025 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 3386-1:2025) has been prepared by Technical Committee ISO/TC 45 "Rubber
and rubber products " in collaboration with Technical Committee CEN/TC 249 “Plastics” the secretariat
of which is held by SIS.
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 January 2026, and conflicting national standards shall
be withdrawn at the latest by January 2026.
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 3386-1:1997.
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, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO 3386-1:2025 has been approved by CEN as EN ISO 3386-1:2025 without any
modification.
International
Standard
ISO 3386-1
Third edition
Polymeric materials, cellular
2025-07
flexible — Determination of
stress-strain characteristics in
compression —
Part 1:
Low-density materials
Matériaux polymères alvéolaires souples — Détermination
de la caractéristique de contrainte-déformation relative en
compression —
Partie 1: Matériaux à basse masse volumique
Reference number
ISO 3386-1:2025(en) © ISO 2025

ISO 3386-1:2025(en)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2025
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
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Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
ISO 3386-1:2025(en)
Contents  Page
Foreword .iv
Introduction .v
1 Scope . 1
2  Normative references . 1
3  Terms and definitions . 1
4 Apparatus . 1
4.1 Test machine .1
4.2 Supporting surface . .2
4.3 Compression plate .2
5 Test piece . 2
5.1 Form and dimensions .2
5.2 Samples showing orientation .2
5.3 Number of test pieces .2
5.4 Conditioning.2
6 Procedure . 3
7  Expression of results . 4
7.1 Compression stress/strain characteristic .4
7.2 Compression stress value .4
8 Repeat tests . 4
9 Test report . 4
Bibliography . 6

iii
ISO 3386-1:2025(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 document 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).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
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 (other than hoses), 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 third edition cancels and replaces the second edition (ISO 3386-1:1986), which has been revised. It also
incorporates the Amendment ISO 3386-1:1986/Amd 1:2010.
The main changes are as follows:
— revision of the text in the Scope, Clause 2 and 3;
— addition of a schematic representation of the test procedure in Clause 6;
A list of all parts in the ISO 3386 series can be found on the ISO website.
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 3386-1:2025(en)
Introduction
The compression stress/strain characteristics is a measure of the load-bearing properties of the material,
though not necessarily of its capacity to sustain
...