ISO 2439:2008(E)Flexible cellular polymeric materials Determination of hardness (indentation technique)
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ISO 2439:2008(E)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 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.
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 1382 Rubber Vocabulary
ISO 7500-1 Metallic materials Verification of static uniaxial testing machines Part 1: Tension/compression testing machines Verification and calibration of the force-measuring system
ISO 23529 Rubber General procedures for preparing and conditioning test pieces for physical test methods

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