標準號：DIN EN ISO 2439-2009
中文標準名稱：柔性泡沫聚合材料 硬度的測定(壓痕法)
英文標準名稱：Flexible cellular polymeric materials - Determination of hardness (indentation technique) (ISO 2439:2008); English version of DIN EN ISO 2439:2009-05
標準類型：G31
發(fā)布日期：1999/12/31 12:00:00
實施日期：1999/12/31 12:00:00
中國標準分類號：G31
國際標準分類號：83.100
引用標準：ISO 1382;ISO 7500-1;ISO 23529
適用范圍：The indentation hardness of flexible cellular materials is a measure of their load-bearing properties. ThisInternational Standard specifies four methods (A to D) for the determination of indentation hardness and onemethod (E) for determination of compressive deflection coefficient and hysteresis loss rate of flexible cellularmaterials. Annex A provides a summary of test parameters and typical force-indentation graphs obtained withthese methods.These five methods are applicable only to latex foam, urethane foam and PVC foam of the open-cell type. Themethods specified can be used for testing finished articles and for the characterization of bulk material.This International Standard specifies the following methodsa) 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, whichprovides information about the shape of the hardness indentation curve;Method C -- Determination of the 40 % indentation hardness check, which is a quick procedure suitablefor quality control testing;Method D -- Determination of the 25 %/20 s low indentation hardness index, which is a quick proceduresuitable as an inspection test;Method E- Determination of the compressive deflection coefficient and hysteresis loss rate, which givesadditional 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, beused directly for design purposes.