ISO 1209-1:2007

INTERNATIONAL ISO
STANDARD 1209-1
Third edition
2007-05-01
Rigid cellular plastics — Determination of
flexural properties —
Part 1:
Basic bending test
Plastiques alvéolaires rigides — Détermination des propriétés de
flexion —
Partie 1: Essai simple de flexion

Reference number
©
ISO 2007
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©
ii ISO 2007 – All rights reserved

Contents Page
1 Scope . 1
2 Normative references . 1
3 Principle . 1
4 Apparatus . 2
5 Test specimens . 3
6 Procedure . 3
7 Expression of results . 4
8 Precision . 4
9 Test report . 4
©
ISO 2007 – All rights reserved iii

Foreword
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ISO 1209-1 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 10, Cellular plastics.
This third edition cancels and replaces the second edition (ISO 1209-1:2004), 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

INTERNATIONAL STANDARD ISO 1209-1:2007(E)
Rigid cellular plastics — Determination of flexural properties —
Part 1:
Basic bending test
1Scope
This part of ISO 1209 specifies a simple method for assessing the behaviour of a bar of rigid cellular plastic
under the action of three-point bending.
It may be used to determine
— either the load for a specified deformation;
— or the load at break.
The version of the method specified in this part of ISO 1209 uses small test specimens and does not produce
pure bending. Hence it does not permit the calculation of the flexural strength or the apparent flexural modulus
(modulus of elasticity). The user is referred to ISO 1209-2 for the determination of these parameters.
The method is not applicable to cellular plastics in which significant crushing is observed. Numerical values
should be compared only when determined on materials of similar physical properties and dimensions.
The method is limited
...