SIST EN ISO 8307:1999

SLOVENSKI STANDARD
SIST EN ISO 8307:1999
01-maj-1999
Polimerni materiali – Mehke pene - Ugotavljanje vzmetnosti (ISO 8307:1990)
Flexible cellular polymeric materials - Determination of resilience (ISO 8307:1990)
Weichelastische polymere Schaumstoffe - Bestimmung der Rückprallelastizität (ISO
8307:1990)
Matériaux polymeres alvéolaires souples - Détermination de la résilience (ISO
8307:1990)
Ta slovenski standard je istoveten z: EN ISO 8307:1997
ICS:
83.100
SIST EN ISO 8307:1999 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------

ISO
INTERNATIONAL
STANDARD 8307
First edition
1990-12-0 1
Flexible cellular polymeric materials -
Determination of resilience
Materiaux polym&es alveolaires souples - Determination de la
rWlience
Reference number
ISO 8307: 199O(E)

---------------------- Page: 2 ----------------------

ISO 8307:1990(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. Esch member body interested in a subject for
which a technical committee has been established has the right to be
International organizations, govern-
represented on that committee.
mental 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 Inter-
national Standard requires approval by at least 75 % of the member
bodies casting a vote.
International Standard ISO 8307 was prepared by Technical Committee
lSO/TC 45, Rubber and rubber products.
0 ISO 1990
All rights reserved. No part of this publication may be reproduced or utilized in any form
or by any means, electronie 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
Printed in Switzerland
ii

---------------------- Page: 3 ----------------------

INTERNATIONAL STANDARD ISO 8307:1990(E)
Flexible cellular polymeric materials - Determination of
resilience
5 Apparatus (see figure 1)
1 Scope
This International Standard specifies a test method
Dimensions in millimetres
for determining the resilience of flexible cellular
polymeric materials.
wQ*lo
.
t-l
2 Normative reference
The following Standard contains provisions which,
through reference in this text, constitute provisions
Ma gnet or other devlce
of this International Standard. At the time of publi-
with recess at base to
cation, the edition indicated was valid. All Standards
locate steel ball
are subject to revision, and Parties to agreements
based on this International Standard are encour-
aged to investigate the possibility of applying the
most recent edition of the Standard indicated below.
Members of IEC and ISO maintain registers of cur-
rently valid International Standards.
ISO 471:1983, Rubber - Standard temperatures, hu-
midities and times for the conditioning and testing
of fest pieces.
Tube to be callbrated as tollows:
3 Definitians
scrlbed on the tube; every 1% a
120' arc to be scribed on the tube ,
For the purposes of this International Standard, the
following definitions apply.
3.1 open-cell flexible cellular material: Flexible cel-
lular material with less than 25 % of its cell volume
closed.
3.2 closed-cell flexible cellular material: Flexible
cellular material with more than 25 % of its cell
volume closed.
Figure 1
4 Principle - Diagrammatic arrangement for test
apparatus
A steel ball is dropped on to a test piece from a
specified height and the height of rebound is meas-
ured.
1

---------------------- Page: 4 ----------------------

ISO 8307:1990(E)
Prior to the test, the test pieces shall be conditioned
The ball rebound test apparatus shall consist of a
40 mm + 10 mm inside diameter vertical trans- undeflected and undistorted for at least 16 h in one
of the following atmospheres as given in ISO 471:
parent t steel ball with a mass of 16 g + 0,5 g is released by
a magnet or other device. The steel ball shall be 23 “C rf- 2 OC, (50 + 5) % relative humidity;
released so that it falls without rotation and is ef-
27 “C 3: 2 “C,
...