硬质泡沫塑料 水蒸气透过性能的测定

[中文适用范围]： 本文件规定了测定硬质泡沫塑料的水蒸气透过率、水蒸气渗透性、水蒸气渗透率和水蒸气扩散阻力指数的方法。本方法适用于测试厚度从 10 毫米起的硬质泡沫材料，这些材料可以包含作为材料组成部分的天然皮或某种不同材料的粘合面。提供了三组不同的温度和湿度条件，如下：a) 38°C，整个试验样品的相对湿度梯度为 0% 至 88%b) 23°C，整个试验样品的相对湿度梯度为 0% 至 85%c) 23°C，整个试验样品的相对湿度梯度为 0% 至 50%用这种方法得到的结果适用于设计目的和生产控制，也适用于纳入产品规范。该方法适用于水蒸气透过率在3 µg/(m2⋅s)至1 400 µg/(m2⋅s)范围内的材料。 [外文原描述]： This document specifies a method of determining the water vapour transmission rate, water vapour permeance, water vapour permeability and water vapour diffusion resistance index for rigid cellular plastics. This method is applicable for the testing of rigid cellular materials that have thicknesses from 10 mm upwards and can, as an integral part of the material, contain natural skins or adhered facings of some different material. Three different sets of temperature and humidity conditions are provided, as follows: a) 38 °C and a relative-humidity gradient across the test specimen of 0 % to 88 % b) 23 °C and a relative-humidity gradient across the test specimen of 0 % to 85 % c) 23 °C and a relative-humidity gradient across the test specimen of 0 % to of 50 % The results obtained by this method are suitable for design purposes and production control, and for inclusion in product specifications. The method is suitable for materials which have water vapour transmission rates in the range 3 µg/(m 2 ⋅s) to 1 400 µg/(m 2 ⋅s).