BS EN ISO 2439:2008
Current
The latest, up-to-date edition.
Flexible cellular polymeric materials. Determination of hardness (indentation technique)
Hardcopy , PDF
English
31-01-2009
Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Apparatus
6 Test pieces
6.1 Shape and dimensions
6.2 Samples showing orientation
6.3 Conditioning
7 Procedure
7.1 General
7.2 Preliminary indentation for Methods A, B and C
7.3 Method A - Determination of the 40%/30 s indentation
hardness index
7.4 Method B - Determination of the 25%-40%-65%/30 s
indentation hardness characteristics
7.5 Method C - Determination of the 40% indentation
hardness check
7.6 Method D - Determination of the 25%/20 s low indentation
hardness index
7.7 Method E - Determination of the compressive deflection
coefficient and hysteresis loss rate
8 Repeat tests
9 Test report
Annex A (informative) - Test method parameters and typical graphs
Annex B (informative) - Precision of Method E
Bibliography
Describes 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.
| Committee |
PRI/70
|
| DevelopmentNote |
Supersedes BS 4443-2(1988) and 94/300610 DC. (09/2001) Supersedes 07/30148751 DC. (01/2009)
|
| DocumentType |
Standard
|
| Pages |
22
|
| PublisherName |
British Standards Institution
|
| Status |
Current
|
| Supersedes |
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. AnnexA 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%/30s indentation hardness index, which gives a single indentation measurement for laboratory test purposes; Method B— Determination of the 25%-40%-65%/30s 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%/20s 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.
| Standards | Relationship |
| I.S. EN ISO 2439:2009 | Identical |
| ISO 2439:2008 | Identical |
| NS EN ISO 2439 : 2ED 2008 | Identical |
| NEN EN ISO 2439 : 2009 | Identical |
| NBN EN ISO 2439 : 2009 | Identical |
| EN ISO 2439:2008 | Identical |
| NF EN ISO 2439 : 2009 | Identical |
| DIN EN ISO 2439:2009-05 | Identical |
| UNE-EN ISO 2439:2009 | Identical |
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