The development history of plastic steel windowsThe development history of plastic steel windows
Plastic windows were first developed by West Germany in the late 1950s, and production began in 1959. The early plastic windows used a single-glue structure, which was relatively simple and rough. With the worldwide energy crisis in 1972, plastic windows with better energy-saving effect in the early 1970s were widely used, which also promoted the improvement of profile production technology. The performance is becoming more and more perfect. The development of single-chamber profiles to three-chamber and four-chamber profiles has also driven the development of plastic doors and windows in Europe and Asia. According to incomplete statistics, the use of plastic doors and windows in Germany has accounted for 52% of the door and window market, 48% in Austria, and more than 10% -20% in developed countries such as Switzerland, Britain, France, and Italy; plastic windows in the United States in the 1970s At the beginning, the annual growth rate of usage has reached more than 15%. Currently, plastic windows are used in Asia, Japan, South Korea, Taiwan, Singapore, Thailand and so on.
China's plastic windows started late, and the calcium-plastic doors and windows produced in the 1970s were of insufficient quality and have been basically eliminated. The production of real plastic windows began with the introduction of equipment in 1983. At that time, the technology was not very advanced, and they used single-cavity or two-cavity structural profiles. With the improvement of the industry in 1991, a number of extrusion equipment and molds have emerged in China. , Profile, assembly equipment and other manufacturers; in 1996, with the country's vigorously advocating and newly established manufacturers that introduced advanced equipment in the 1990s, greatly promoted the development of the industry. At present, there are more than 2,000 profile extrusion production lines in China, more than 400 profile factories, and more than 3,000 assembly plants. In 1999, the profile production capacity was 800,000 tons, and the annual assembly capacity of doors and windows was 60 million square meters. Many fast-growing industries. Plastic doors and windows are being accepted by users because of their excellent performance.