BS EN ISO 2439-2008 软质泡沫聚合物材料.硬度的测定(压痕技术)

标准号：BS EN ISO 2439-2008
中文标准名称：软质泡沫聚合物材料.硬度的测定(压痕技术)
英文标准名称：Flexible cellular polymeric materials - Determination of hardness (indentation technique)
标准类型：G31
发布日期：2009/1/31 12:00:00
实施日期：2009/1/31 12:00:00
中国标准分类号：G31
国际标准分类号：83.100
引用标准：ISO 1382;ISO 7500-1;ISO 23529
适用范围：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 methods:a) Method A — Determination of the 40 %/30 s indentation hardness index, which gives a single indentationmeasurement for laboratory test purposes;b) Method B — Determination of the 25 %-40 %-65 %/30 s indentation hardness characteristics, whichprovides information about the shape of the hardness indentation curve;c) Method C — Determination of the 40 % indentation hardness check, which is a quick procedure suitablefor quality control testing;d) Method D — Determination of the 25 %/20 s low indentation hardness index, which is a quick proceduresuitable as an inspection test;e) 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.