EN ISO 3385:2014

SLOVENSKI STANDARD
01-oktober-2014
1DGRPHãþD
SIST EN ISO 3385:2000
Penjeni polimerni materiali - Mehke pene - Ugotavljanje utrujenosti materiala s
sunkovitim obremenjevanjem s konstantno silo (ISO 3385:2014)
Flexible cellular polymeric materials - Determination of fatigue by constant-load pounding
(ISO 3385:2014)
Weich-elastische polymere Schaumstoffe - Bestimmung der Ermüdung im
Dauerschwingversuch mit Stoßbelastung unter konstanter Kraft (ISO 3385:2014)
Matériaux polymères alvéolaires souples - Détermination de la fatigue par indentation à
charge constante (ISO 3385:2014)
Ta slovenski standard je istoveten z: EN ISO 3385:2014
ICS:
83.100 Penjeni polimeri Cellular materials
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 3385
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2014
ICS 83.100 Supersedes EN ISO 3385:1995
English Version
Flexible cellular polymeric materials - Determination of fatigue by
constant-load pounding (ISO 3385:2014)
Matériaux polymères alvéolaires souples - Détermination de Weich-elastische polymere Schaumstoffe - Bestimmung der
la fatigue par indentation à charge constante (ISO Ermüdung im Dauerschwingversuch mit Stoßbelastung
3385:2014) unter konstanter Kraft (ISO 3385:2014)
This European Standard was approved by CEN on 28 June 2014.

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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United
Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2014 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 3385:2014 E
worldwide for CEN national Members.

Contents Page
Foreword .3
Foreword
This document (EN ISO 3385:2014) 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 NBN.
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 2015, and conflicting national standards shall be withdrawn at
the latest by January 2015.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 3385:1995.
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, Former Yugoslav Republic of Macedonia, France, Germany, Greece,
Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.
Endorsement notice
The text of ISO 3385:2014 has been approved by CEN as EN ISO 3385:2014 without any modification.
INTERNATIONAL ISO
STANDARD 3385
Fourth edition
2014-07-15
Flexible cellular polymeric
materials — Determination of fatigue
by constant-load pounding
Matériaux polymères alvéolaires souples — Détermination de la
fatigue par indentation à charge constante
Reference number
ISO 3385:2014(E)
©
ISO 2014
ISO 3385:2014(E)
© ISO 2014
All rights reserved. Unless otherwise specified, 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 the internet or an intranet, without prior
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Published in Switzerland
ii © ISO 2014 – All rights reserved

ISO 3385:2014(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Principle . 1
4 Apparatus . 1
5 Test pieces . 4
5.1 Shape and dimensions . 4
5.2 Samples showing orientation . 5
5.3 Number . 5
5.4 Conditioning . 5
6 Procedure. 5
7 Expression of results . 6
7.1 Loss in thickness. 6
7.2 Loss in hardness . 7
7.3 Percentage hardness loss . 7
8 Precision . 7
9 Test report . 7
Annex A (informative) Typical loading cycle. 9
Annex B (informative) Precision .10
Annex C (informative) Precision study — Machine Type B .12
Bibliography .13
ISO 3385:2014(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.
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 on the meaning of ISO specific terms and expressions related to conformity
assessment, as well as information about ISO’s adherence to the WTO principles in the Technical Barriers
to Trade (TBT) see the following URL: Foreword - Supplementary information.
The committee responsible for this document is ISO/TC 45, Rubber and rubber products, Subcommittee
SC 4, Products other than hoses.
This fourth edition cancels and replaces the third edition (ISO 3385:1989), which has been technically
revised.
iv © ISO 2014 – All rights reserved

INTERNATIONAL STANDARD ISO 3385:2014(E)
Flexible cellular polymeric materials — Determination of
fatigue by constant-load pounding
1 Scope
This International Standard specifies a method for the determination of loss in thickness and loss in
hardness of flexible cellular materials intended for use in load-bearing applications such as upholstery.
It provides a means of assessing the service performance of flexible cellular materials based on rubber
latex or polyurethane used in load-bearing upholstery.
The method is applicable both to standard size test pieces cut from slabstock material and to shaped
components. The measured loss in thickness and loss in hardness are related to, but are not necessarily
the same as, the losses likely to occur in service.
This international Standard is not intended to function as a detailed engineering design specification
for fatigue apparatus.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
ISO 2439:2008, Flexible cellular polymeric materials — Determination of hardness (indentation technique)
3 Principle
Repeated indentation of a test piece by an indentor smaller in area than the test piece, the maximum
load reached during each cycle being kept within specified limits. The typical loading cycle is shown in
Figure A.1.
4 Apparatus
4.1 Pounding test machine of either Type A (see 4.2) or Type B (see 4.3), having the following
parts.
4.1.1 Plane platen, capable of fully supporting the test piece, and suitably vented with holes
approximately 6 mm in diameter at approximately 20 mm pitch in order to allow air to escape from the
test piece.
4.1.2 Indentor, having an overall diameter of 250 mm ± 1 mm with a 25 mm ± 1 mm radius at its lower
edge, provided with a device for applying a maximum force of 750 N ± 20 N during the loading cycle. The
indentor sh
...