International Standard
ISO 2439:2008
Flexible cellular polymeric materials — Determination of hardness (indentation technique)
Reference number
ISO 2439:2008
Edition 4
2008-12
International Standard
Read sample
ISO 2439:2008
42717
Published (Edition 4, 2008)
This standard was last reviewed and confirmed in 2021. Therefore this version remains current.

ISO 2439:2008

ISO 2439:2008
42717
Language
Format
CHF 96
Convert Swiss francs (CHF) to your currency

Abstract

The indentation hardness of flexible cellular materials is a measure of their load-bearing properties. ISO 2439:2008 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.

ISO 2439:2008 specifies the following methods:

  1. Method A — Determination of the 40 %/30 s indentation hardness index, which gives a single indentation measurement for laboratory test purposes;
  2. Method B — Determination of the 25 %-40 %-65 %/30 s indentation hardness characteristics, which provides information about the shape of the hardness indentation curve;
  3. Method C — Determination of the 40 % indentation hardness check, which is a quick procedure suitable for quality control testing;
  4. Method D — Determination of the 25 %/20 s low indentation hardness index, which is a quick procedure suitable as an inspection test;
  5. 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.

General information

  •  : Published
     : 2008-12
    : International Standard confirmed [90.93]
  •  : 4
     : 14
  • ISO/TC 45/SC 4
    83.100 
  • RSS updates

Life cycle

Got a question?

Check out our FAQs

Customer care
+41 22 749 08 88

Opening hours:
Monday to Friday - 09:00-12:00, 14:00-17:00 (UTC+1)