标准摘要
[中文适用范围]： ISO 2528:2017 规定了一种测定片状材料水蒸气透过率（常误称为“透气性”）的方法。该方法一般不推荐用于预期透过率低于 1 g/(m²·d) 或材料厚度超过 3 mm 的情况，此类情况首选 ISO 9932 规定的方法。该方法不适用于会被热蜡损坏或在测试条件下显著收缩的薄膜材料。对于某些目的，可能需要测定皱褶材料的透过率；Annex A 中给出了相应程序。 [外文原描述]： ISO 2528:2017 specifies a method for the determination of the water vapour transmission rate (often erroneously called "permeability") of sheet materials. This method is not generally recommended for use if the transmission rate is expected to be less than 1 g/m 2 per day or for materials thicker than 3 mm. In such cases the method specified in ISO 9932 is preferred. The method cannot be applied to film materials that are damaged by hot wax or that shrink to an appreciable extent under the test conditions used. For some purposes it may be necessary to determine the transmission rate of creased material; a procedure for this is given in Annex A.
英文名称Sheet materials — Determination of water vapour transmission rate (WVTR) — Gravimetric (dish) method