PVC窗框,早在1955年,西德首先开始研究试制,至今,德国PVC窗的加工应用技术和实际产量在世界上遥遥领先。1978—1979年生产量增加了47％,耗用12.5万吨PVC。在英国,PVC窗已形成了一个新的工业部门。两年前,PVC窗只占建筑用窗总量的1％,目前已达4％,可望今年增加到7％。美国1980年用于制造PVC窗的树脂估计达2.7万吨(原文为 PVC window frames, as early as 1955, West Germany first began trial production, so far, the German PVC window processing and application technology and actual production in the world far ahead. From 1978 to 1979, the production volume increased by 47% and consumed 125,000 tons of PVC. In the UK, PVC windows have formed a new industrial sector. Two years ago, PVC windows accounted for only 1% of the total number of windows used in buildings, and it has now reached 4%, which is expected to increase to 7% this year. The resin used in the manufacture of PVC windows in the United States in 1980 was estimated at 27,000 tons (Originally