ISO 1209-2:2007

INTERNATIONAL ISO
STANDARD 1209-2
Third edition
2007-05-01
Rigid cellular plastics — Determination of
flexural properties —
Part 2:
Determination of flexural strength and
apparent flexural modulus of elasticity
Plastiques alvéolaires rigides — Détermination des propriétés de
flexion —
Partie 2: Détermination de la résistance à la flexion et du module
apparent d'élasticité en flexion

Reference number
ISO 1209-2:2007(E)
©
ISO 2007

---------------------- Page: 1 ----------------------
ISO 1209-2:2007(E)
PDF disclaimer
This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall
not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In
downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat
accepts no liability in this area.
Adobe is a trademark of Adobe Systems Incorporated.
Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation
parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In the
unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below.
COPYRIGHT PROTECTED DOCUMENT
© ISO 2007
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 either ISO at the address below or
ISO's member body in the country of the requester.
ISO copyright office
Case postale 56  CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
©
ii ISO 2007 – All rights reserved

---------------------- Page: 2 ----------------------
ISO 1209-2:2007(E)
Contents Page
1 Scope . 1
2 Normative references . 1
3 Principle . 1
4 Apparatus . 1
5 Test specimens . 2
6 Conditioning and test conditions . 3
7 Procedure . 3
8 Expression of results . 4
9 Precision . 5
10 Test report . 5
©
ISO 2007 – All rights reserved iii

---------------------- Page: 3 ----------------------
ISO 1209-2:2007(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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. 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.
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.
ISO 1209-2 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 10, Cellular plastics.
This third edition cancels and replaces the second edition (ISO 1209-2:2004), which has been technically
revised.
ISO 1209 consists of the following parts, under the general title Rigid cellular plastics — Determination of
flexural properties:
— Part 1: Basic bending test
— Part 2: Determination of flexural strength and apparent flexural modulus of elasticity
©
iv ISO 2007 – All rights reserved

---------------------- Page: 4 ----------------------
INTERNATIONAL STANDARD ISO 1209-2:2007(E)
Rigid cellular plastics — Determination of flexural properties —
Part 2:
Determination of flexural strength and apparent flexural
modulus of elasticity
1Scope
This part of ISO 1209 specifies a method for determining the flexural strength and the apparent flexural
modulus of elasticity of rigid cellular plastics.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced document
(including any amendments) applies.
ISO 1923, Cellular plastics and rubbers — Determination of linear dimensions
3 Principle
A load is applied at a uniform rate by means of a loading edge to a test specimen supported at two positions.
The load is applied perpendicularly to the specimen at a position midway between the supporting positions
(see Figure 1). The load/deformation curve is recorded. From the curve, the flexural strength and the apparent
flexural modulus of elasticity are calculated.
4 Apparatus
4.1 Test machine, consisting of a universal mechanical-testing machine capable of operating at a constant
rate of movement of the moveable head.
The range of the test machine shall be such that the applied load can be measured with an accuracy of ±1%.
The machine shall include a device for simultaneous recording of force and the corresponding deformation.
4.2 Test spe
...