国外发达国家的环保节能观念深入人心,早在20世纪70年代后,国外就普遍重视保温材料的生产和在建筑中的应用,力求大幅度减少能源的消耗量,从而减少环境污染和温室效应。一些发达国家早在上世纪70年代末就已经开始了建筑节能的工作,强制建筑业在新建建筑中执行节能标准。美国在1975年第一次颁布了ASHRAE(美国采暖、制冷及空调工程协会)90～75新建筑物设 The concept of environmental protection and energy conservation in developed countries enjoys popular support. As early as the 1970s, foreign countries generally attached great importance to the production of insulation materials and their application in construction, and sought to reduce energy consumption drastically so as to reduce environmental pollution and greenhouse effect. Some developed countries started building energy conservation as early as the late 1970s and forced the construction industry to implement energy conservation standards in new buildings. The United States issued the first ASHRAE (American Association of Heating, Refrigerating and Air-Conditioning Engineering) 90-75 new building in 1975