1 前言 塑钢门窗开发、推广最早在欧洲。目前德国塑钢门窗已占全部门窗的52％,其他发达国家如美国、日本等也已达30％以上。而我国1997年全国的塑钢门窗占有率仅为1％～2％。中国从80年代初开始推广塑钢门窗生产及组装技术,由于当时PVC树脂价格高、五金件不配套,不少生产厂家开工不足,使塑钢门窗发展缓慢。自90年代初期起,PVC树脂价格下降,门窗生产技术日趋成 1 Introduction The development and promotion of steel doors and windows was first in Europe. At present, German plastic steel doors and windows have accounted for 52% of all doors and windows. Other developed countries such as the United States and Japan have also reached more than 30%. In 1997, the share of steel doors and windows in China was only 1% to 2%. From the early 1980s, China began to promote the production and assembly of plastic steel doors and windows. Due to the high price of PVC resin and the lack of supporting hardware, many manufacturers were underemployed, making the development of steel doors and windows slow. Since the early 1990s, the price of PVC resin has decreased, and the production technology for windows and doors has become increasingly