EN ISO 3386-2:1998

Flexible cellular polymeric materials - Determination of stress-strain characteristics in compression - Part 2: High-density materials (ISO 3386-2:1997)

Polymere Materialien - Bestimmung der Druckspannungs-Verformungseigenschaften - Teil 2: Materialien mit hoher Dichte (ISO 3386-2:1997)

Dieser Teil der ISO 3386 legt ein Verfahren für die Bestimmung der Druckspannungs-Verformungseigenschaften von weichelastischen Schaumstoffen mit einer Dichte größer als 250 kg/m3 fest. Die Druckspannungs-Verformungseigenschaften sind ein Maß für die tragenden Eigenschaften des Materials, lassen jedoch keine Aussage zum Verhalten bei Langzeitbelastung zu.

Matériaux polymères alvéolaires souples - Détermination de la caractéristique de contrainte-déformation relative en compression - Partie 2: Matériaux à masse volumique élevée (ISO 3386-2:1997)

Penjeni polimerni materiali - Mehke pene - Določanje diagrama napetost/raztezek - 2. del: Materiali z visoko gostoto (ISO 3386-2:1997)

General Information

• Status: Published
• Publication Date: 21-Apr-1998
• Withdrawal Date: 30-Oct-1998
• ICS: 83.100 - Cellular materials
• Technical Committee: CEN/TC 249 - Plastics
• Drafting Committee: CEN/TC 249/SC 4 - Cellular plastics
• Current Stage: 9093 - Decision to confirm - Review Enquiry
• Start Date: 23-Nov-2007
• Completion Date: 23-Nov-2007
• Ref Project: SIST EN ISO 3386-2:2000 - Flexible cellular polymeric materials - Determination of stress-strain characteristics in compression - Part 2: High-density materials (ISO 3386-2:1997)

Relations

• Amended By: EN ISO 3386-2:1998/A1:2010 - Flexible cellular polymeric materials - Determination of stress-strain characteristics in compression - Part 2: High-density materials - Amendment 1 (ISO 3386-2:1997/Amd 1:2010)
• Effective Date: 22-Dec-2008

Overview

EN ISO 3386-2:1998 defines the standardized method for determining the compression stress-strain characteristics of flexible cellular polymeric materials with high density (above 250 kg/m³). This essential International Standard, developed by ISO Technical Committee TC 45 (Rubber and rubber products), provides a reliable procedure for testing the load-bearing properties of dense flexible cellular materials, such as expanded cellular rubbers, under compressive forces.

Unlike indentation hardness tests, this method specifically measures compression behavior as a function of deformation, which is critical for evaluating material performance under compression stresses relevant to practical applications. It is complementary to Part 1 of the ISO 3386 series, which covers low-density materials.

Key Topics

• Scope: Specifies testing for high-density flexible cellular polymers exceeding 250 kg/m³, with optional use from 150 kg/m³ for comparison.
• Test Material: Flexible cellular polymeric materials, including expanded cellular rubbers.
• Test Specimen: Right parallelepiped shape with square load-bearing faces of minimum 40 mm side and thickness with a width-to-thickness ratio of 4:1.
• Test Conditions: Conditioning at controlled temperature (23°C or 27°C) and relative humidity for at least 16 hours right before testing.
• Test Procedure:
  • Compression at a uniform rate of 5 ± 1 mm/min.
  • Measurement during the fourth loading cycle.
  • Calculation of compression stress in kilopascals using force and load-bearing area.
• Shape Factor: Defined as the ratio between the load-bearing face area and the sum of the side areas; shape affects test comparability.
• Accuracy Requirements: Force measurements within ±2%, thickness measurements within ±0.1 mm.
• Test Report: Includes test standard reference, material description, test conditions, specimen dimensions, and compression stress-strain results.

Applications

This standard is crucial for manufacturers, engineers, and quality control professionals involved in the development, testing, and certification of high-density flexible cellular polymer materials used in:

• Automotive seating and cushioning systems where compressive durability is required.
• Building and construction for insulation and vibration dampening materials.
• Medical devices such as cushioning and support pads.
• Furniture and mattresses where load-bearing comfort and resilience are critical.
• Protective packaging materials requiring durable compression resistance.
• Any industrial product requiring defined load-bearing properties of flexible cellular polymers.

By following EN ISO 3386-2, stakeholders ensure consistent and reproducible measurements of compression behavior, facilitating reliable comparisons between materials and compliance with safety and performance requirements.

Related Standards

• EN ISO 3386-1: Flexible cellular polymeric materials - Compression stress-strain characteristics for low-density materials (≤ 250 kg/m³).
• ISO 2439: Determination of hardness of flexible cellular materials by indentation technique.
• ISO 1923: Determination of linear dimensions of cellular plastics and rubbers.
• Other ISO Rubber Standards: Various standards under ISO/TC 45 relevant for testing rubber and polymer products.

Adopting this standard along with related ISO standards ensures comprehensive characterization of flexible cellular polymers, covering key mechanical and physical properties pertinent to product design and quality assurance.

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Keywords

Flexible cellular polymeric materials, compression test, stress-strain characteristics, high-density polymer foam, EN ISO 3386-2, flexible cellular rubbers, load-bearing properties, compression strain measurement, material testing standard, polymer foam compression, ISO test methods, rubber and plastic testing, material quality control.

Standards Content (Sample)

SLOVENSKI STANDARD
01-maj-2000
3HQMHQLSROLPHUQLPDWHULDOL0HKNHSHQH'RORþDQMHGLDJUDPDQDSHWRVWUD]WH]HN
GHO0DWHULDOL]YLVRNRJRVWRWR,62
Flexible cellular polymeric materials - Determination of stress-strain characteristics in
compression - Part 2: High-density materials (ISO 3386-2:1997)
Polymere Materialien - Bestimmung der Druckspannungs-Verformungseigenschaften -
Teil 2: Materialien mit hoher Dichte (ISO 3386-2:1997)
Matériaux polymeres alvéolaires souples - Détermination de la caractéristique de
contrainte-déformation relative en compression - Partie 2: Matériaux a masse volumique
élevée (ISO 3386-2:1997)
Ta slovenski standard je istoveten z: EN ISO 3386-2:1998
ICS:
83.100 Penjeni polimeri Cellular materials
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

IS0
INTERNATIONAL
3386-2
STANDARD
Second edition
1997-06-I 5
Flexible cellular polymeric materials -
Determination of stress-strain
characteristics in compression -
Part 2:
High-density materials
Ma tbriaux polymtkes alv6olaires souples - Dbtermina tion de
la caractbristique de contrainte-dkformation relative en compression -
.
Partie 2: Matkriaux & masse volumique kIevhe
Reference number
IS0 3386-2: 1997(E)
IS0 3386=2:1997(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 3386-2 was prepared by Technical Committee lSO/TC 45,
Rubber and rubber products.
This second edition cancels and replaces the first edition (IS0 3386-2:i 984), of which
it constitutes a minor revision (in clause 4, second paragraph, the accuracy required for
measurement of the test piece thickness has been changed from 0,02 mm to 0,i mm).
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 @ iso.ch
x.400 c=ch; a=400net; p=iso; o=isocs; s=central
Printed in Switzerland
ii
IS0 3386-2: 1997(E)
INTERNATIONAL STANDARD @ IS0
Flexible cellular polymeric materials - Determination
of stress-strain characteristics in compression -
Part 2:
High-density materials
1 Scope
This part of IS0 3386 specifies a method for the determination of the compression
stress-strain characteristics of flexible cellular polymeric materials of density greater than
250 kg/m3.
The compression stress-strain characteristic is a measure of the load-bearing properties
of the material, though not necessarily of its capacity to sustain a long-term load.
The compression stress-strain characteristic differs from the indentation hardness
characteristics (as determined in accordance with IS0 2439) which are known to be
influenced by the thickness and the tensile properties of the flexible cellular material
under test, the shape of the compression piate, and the shape and size of the test piece.
IS0 3386-l specifies a method for low-density flexible materials, and differs from Part 2 in
the following ways:
Part 1 is concerned with materials of density up to 250 kg/m’, whilst Part 2 is
mainly concerned with materials of density above 250 kg/m3;
compression stress values have been deleted from Part 2;
Part 2 does not allow the use of a cylindrical test piece.
This part of IS0 3386 is a general method for testing denser flexible cellular materials
(i.e. expanded cellular rubbers), measurements being made on one of more points on the
steeply rising part of the stress-strain curve. The shape factor of the test piece is
important and comparative test results can only be obtained on test pieces having the
same shape factor.
NOTE 1 For comparison purposes, the method may be used for material of 150 kg/m3 density or greater.
@ IS0
IS0 3386-2: 1997(E)
2 Normative references
The following standards contain provisions which, through reference in this text,
constitute provisions of this International Standard. At the time of publication, the editions
indicated were 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 editions of the standards indicated below. Members of IEC and
IS0 maintain registers of currently valid International Standar
...