SIST EN ISO 7214:2001

SLOVENSKI STANDARD
SIST EN ISO 7214:2001
01-junij-2001
Penjeni polimerni materiali - Polietilen - Preskusne metode (ISO 7214:1998)
Cellular plastics - Polyethylene - Methods of test (ISO 7214:1998)
Schaumstoffe aus Polyethylen - Prüfverfahren (ISO 7214:1998)
Plastiques alvéolaires - Polyéthylene - Méthodes d'essai (ISO 7214:1998)
Ta slovenski standard je istoveten z: EN ISO 7214:2000
ICS:
83.100 Penjeni polimeri Cellular materials
SIST EN ISO 7214:2001 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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INTERNATIONAL ISO
STANDARD 7214
Second edition
1998-03-15
Cellular plastics — Polyethylene —
Methods of test
Plastiques alvéolaires — Polyéthylène — Méthodes d'essai
A
Reference number
ISO 7214:1998(E)

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ISO 7214:1998(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.
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 ISO 7214 was prepared by Technical Committee
ISO/TC 61, Plastics, Subcommittee SC 10, Cellular plastics.
This second edition cancels and replaces the first edition (ISO 7214:1985),
which has been technically revised.
Annex A forms an integral part of this International Standard.
©  ISO 1998
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 • CH-1211 Genève 20 • Switzerland
Internet central@iso.ch
X.400 c=ch; a=400net; p=iso; o=isocs; s=central
Printed in Switzerland
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©
INTERNATIONAL STANDARD  ISO ISO 7214:1998(E)
Cellular plastics – Polyethylene – Methods of test
1 Scope
1.1 This International Standard specifies methods for testing flexible and semi-rigid
cellular plastics made from polyethylene. Cellular plastics containing copolymers of ethylene
or blends of polymers with polyethylene may also be tested by the procedures of this
International Standard, provided these materials have characteristics similar to polyethylene as
described in ISO 1872-1, or copolymers of ethylene as described in ISO 4613-1.
1.2 Basic tests suitable for characterization of cellular polyethylene, regardless of end use,
are described in clause 7. Clause 8 describes supplementary tests for the determination of
properties that are relevant to certain uses.
1.2.1 Basic tests
Subclause
Apparent density 7.1
Compressive stress-strain 7.2
Compression set 7.3
Tensile strength and elongation 7.4
Thermal stability 7.5
Water absorption 7.6
Burning characteristics 7.7
1.2.2 Supplementary tests
Subclause
Dynamic cushioning performance 8.1
Compressive creep 8.2
Thermal conductivity 8.3
Water vapour transmission 8.4
Dynamic stiffness 8.5
Cell count 8.6
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 using the most recent
editions of the standards listed below. Members of IEC and ISO maintain registers of
currently valid International Standards.
1

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©
ISO
ISO 7214:1998(E)
ISO 845:1988, Cellular plastics and rubbers - Determination of apparent (bulk) density.
1)
ISO 1663:– , Rigid cellular plastics - Determination of water vapour transmission
properties.
ISO 1798:1997, Flexible cellular polymeric materials - Determination of tensile strength and
elongation at break.
ISO 1856:1980, Polymeric materials, cellular flexible - Determination of compression set.
ISO 1872-1:1993, Plastics - Polyethylene (PE) moulding and extrustion materials - Part 1:
Designation system and basis for specifications.
ISO 1923:1981, Cellular plastics and rubbers - Determination of linear dimensions.
ISO 2896:1987, Cellular plastics, rigid - Determination of water absorption.
ISO 3386-1:1986, Polymeric materials, cellular flexible - Determination of stress-strain
characteristics - Part 1: Low-density materials.
ISO 3582:1978, Cellular plastic and cellular rubber materials - Laboratory assessment of
horizontal burning characteristics of small specimens subjected to a small flame.
ISO 4613-1:1993, Plastics - Ethylene/vinyl acetate (E/VAC) moulding and extrusion
materials - Part 1: Designation and specification.
ISO 4651:1988, Cellular rubbers and plastics - Determination of dynamic cushioning
performance.
ISO 7850:1986, Cellular plastics, rigid - Determination of compressive creep.
ISO 8301:1991, Thermal insulation - Determination of steady-state thermal resistance and
related properties - Heat flow meter apparatus.
ISO 8302:1991, Thermal insulation, Determination of steady-state thermal resistance and
related properties - Guarded hot plate apparatus.
ISO 8497:1994, Thermal insulation - Determination of steady-state thermal transmission
properties of thermal insulation for circular pipes.
ISO 9772:1994, Cellular plastics - Determination of horizontal burning characteristics of
small specimens subjected to a small flame.

1) To be published. (Revision of 1663:1981)
2

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©
ISO
ISO 7214:1998(E)
3 Test specimens
3.1 Cut the specimens so that the edges are clean and the sides are planar and normal to
the surface. Take the specimens from parts of the sample in such a way that for each property
investigated a representative value can be determined. If the sample is believed to be
anisotropic, cut specimens in directions oriented so that the properties pertaining to the
directions most important for practical purposes can be determined.
The numbers, shapes and dimensions of specimens shall comply with the requirements of
clauses 7 and 8. The surfaces of specimens shall be essentially in the same conditions as that
of the surface of the material as it is used in practice, except as required by specific test
procedures.
4 Conditioning
At least 72 h shall elapse between manufacture of the material and the testing of the
specimens. The material shall be stored under normal ambient conditions until the specimens
are prepared. Unless otherwise specified in clauses 7 and 8, condition the specimens
immediately before testing for at least 16 h at a temperature of 23 °C ± 2 °C. The conditioning
2)
period may form part of the 72 h period.
5 Atmosphere during test
Test the specimens at 23 °C ± 2 °C and (50 ± 5) % relative humidity, unless otherwise
specified.
6 Measurement of dimensions
Where possible, use the apparatus described in ISO 1923. However, if the specimens are not
planar over the area of measurement because they are cut from curved articles, measure
dimensions not exceeding 30 mm by means of a hand-held dial gauge with a circular foot of
20 mm diameter. Up to 1 kPa pressure may be applied to the foot, provided that the
deformation of the specimen is less than the required accuracy of measurement.
7 Basic tests
7.1 Apparent density
Perform the test in accordance with ISO 845.
7.2 Compressive stress-strain
Perform the compressive test in accordance with ISO 3386-1. For materials less than 10 mm
thickness, stack to at least
...