ISO 2439:2008 软质泡沫聚合材料 硬度的测定（压陷法）

标准编号：ISO 2439:2008

中文名称：软质泡沫聚合材料 硬度的测定（压陷法）

英文名称：Flexible cellular polymeric materials — Determination of hardness (indentation technique)

发布日期：2008-12

标准范围

柔性多孔材料的压痕硬度是其承载性能的量度。ISO 2439:2008规定了四种测定压痕硬度的方法（A至D）和一种测定柔性多孔材料压缩挠曲系数和滞后损失率的方法（E）。附录A提供了用这些方法获得的试验参数和典型的力-压痕图的总结。这五种方法仅适用于开孔型的乳胶泡沫、聚氨酯泡沫和PVC泡沫。规定的方法可用于测试成品和表征散装材料。ISO 2439:2008规定了以下方法:方法A-40%/30s压痕硬度指数的测定，其给出了用于实验室测试目的的单个压痕测量值；方法B-确定25%-40%-65%/30s压痕硬度特性，其提供关于硬度压痕曲线形状的信息；方法C-40%压痕硬度检查的测定，这是一种适用于质量控制测试的快速程序；方法D-测定25%/20s低压痕硬度指数，这是一种适合作为检验测试的快速程序；方法E-确定压缩挠度系数和滞后损失率，这给出了关于材料承载特性的附加信息。通过这些方法获得的结果仅与规定的测试条件有关，通常不能直接用于设计目的。

The indentation hardness of flexible cellular materials is a measure of their load-bearing properties. ISO 2439:2008 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.ISO 2439:2008 specifies the following methods:

1. Method A — Determination of the 40 %/30 s indentation hardness index, which gives a single indentation measurement for laboratory test purposes;
2. Method B — Determination of the 25 %-40 %-65 %/30 s indentation hardness characteristics, which provides information about the shape of the hardness indentation curve;
3. Method C — Determination of the 40 % indentation hardness check, which is a quick procedure suitable for quality control testing;
4. Method D — Determination of the 25 %/20 s low indentation hardness index, which is a quick procedure suitable as an inspection test;
5. 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.

标准预览图