隔热材料.耐冻结-融化性测定

[中文适用范围]： 本国际标准规定了用于确定产品从-20°C干燥条件到+20°C潮湿条件（水）的连续循环对产品机械性能和水分含量影响的设备和程序。 。 适用于保温制品。 该方法旨在模拟经常暴露在水和低温条件下的隔热产品的冻融效应，例如倒置的屋顶和无保护的地面隔热材料。 不建议所有隔热产品使用此测试方法。 通常从产品标准中可以清楚地看出本国际标准是否适用于特定产品。 [外文原描述]： ISO 20394:2007 specifies the equipment and procedures for determining the effect, on the mechanical properties and moisture content of a product, of the successive cycling of the product from dry conditions at -20 °C to wet conditions (water) at +20 °C. It is applicable to thermal-insulation products. The method is intended to simulate freeze-thaw effects on thermal-insulation products which are frequently exposed to water and low-temperature conditions, e.g. inverted roofs and unprotected ground insulation. This test method is not recommended for all thermal-insulation products. It will normally be clear from the product standard, if this International Standard is applicable to a particular product.