BS EN ISO 2439:2008
Flexible cellular polymeric materials - Determination of hardness (indentation technique)

Standard No.

BS EN ISO 2439:2008

Release Date

2009

Published By

British Standards Institution (BSI)

Status

Be replaced 2009-01

Replace By

BS EN ISO 2439:2009

Latest

BS EN ISO 2439:2009

Replace

BS EN ISO 2439:2001 07/30148751 DC:2007

Scope

The indentation hardness of flexible cellular materials is a measure of their load-bearing properties. This International Standard specifies four methods (A to D) for the determination of indentation hardness and one method (E) for determination of compressive deflection coefficient and hysteresis loss rate of flexible cellular materials. Annex A provides a summary of test parameters and typical force-indentation graphs obtained with these methods. These five methods are applicable only to latex foam, urethane foam and PVC foam of the open-cell type. The methods specified can be used for testing finished articles and for the characterization of bulk material. This International Standard specifies the following methods: a) Method A — Determination of the 40 %/30 s indentation hardness index, which gives a single indentation measurement for laboratory test purposes; b) Method B — Determination of the 25 %-40 %-65 %/30 s indentation hardness characteristics, which provides information about the shape of the hardness indentation curve; c) Method C — Determination of the 40 % indentation hardness check, which is a quick procedure suitable for quality control testing; d) Method D — Determination of the 25 %/20 s low indentation hardness index, which is a quick procedure suitable as an inspection test; e) Method E — Determination of the compressive deflection coefficient and hysteresis loss rate, which gives additional information about the load-bearing properties of materials. The results obtained by these methods relate only to the test conditions specified and cannot, in general, be used directly for design purposes.

BS EN ISO 2439:2008 Referenced Document

• ISO 1382 Rubber — Vocabulary*， 2020-10-28 Update
• ISO 23529 Rubber - General procedures for preparing and conditioning test pieces for physical test methods*， 2016-11-01 Update
• ISO 7500-1 Metallic materials - Calibration and verification of static uniaxial testing machines - Part 1: Tension/compression testing machines - Calibration and verification of the force-measuring system*， 2018-02-01 Update

BS EN ISO 2439:2008 history

• 2009 BS EN ISO 2439:2009 Flexible cellular polymeric materials. Determination of hardness (indentation technique)
• 2009 BS EN ISO 2439:2008 Flexible cellular polymeric materials - Determination of hardness (indentation technique)
• 2001 BS EN ISO 2439:2001 Flexible cellular polymeric materials - Determination of hardness (indentation technique)