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ISO 2439

Flexible cellular polymeric materials - Determination of hardness (indentation technique)

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Organization: ISO
Publication Date: 15 December 2008
Status: active
Page Count: 20
ICS Code (Cellular materials): 83.100
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:

Method A - Determination of the 40 %/30 s indentation hardness index, which gives a single indentation measurement for laboratory test purposes;

Method B - Determination of the 25 %-40 %-65 %/30 s indentation hardness characteristics, which provides information about the shape of the hardness indentation curve;

Method C - Determination of the 40 % indentation hardness check, which is a quick procedure suitable for quality control testing;

Method D - Determination of the 25 %/20 s low indentation hardness index, which is a quick procedure suitable as an inspection test;

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.

Document History

ISO 2439
December 15, 2008
Flexible cellular polymeric materials - Determination of hardness (indentation technique)
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...
September 15, 1997
Flexible cellular polymeric materials - Determination of hardness (indentation technique)
A description is not available for this item.
November 1, 1980
Polymeric Materials, Cellular Flexible - Determination of Hardness (Indentation Technique)
A description is not available for this item.
October 1, 1972
Flexible cellular materials - Hardness testing by indentation techniques
This International Standard specifies three test procedures for determining the indentation hardness of flexible cellular materials. Procedure A (Indentation hardness index) gives a single...

References

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