What is this? Plastic windows?

Plastic steel window is a window type actively promoted by the country in the mid-1990s after wooden window, iron window and aluminum alloy window. Because of its low price and good performance-price ratio, it is still widely used at present. The frame of this window is made of polyvinyl chloride (PVC) resin as the main raw material, with a certain proportion of stabilizer, colorant, filler, ultraviolet absorber and so on. And extruded into profiles; It is one of the most commonly used windows in modern architecture.

Plastic windows were first developed by West Germany in the late 1950s, and production began in 1959. At first, plastic windows were simple and rough. With the worldwide energy crisis of 1972, plastic windows with good energy-saving effect were widely used in the early 1970s, which also promoted the improvement of profile production technology and improved its performance. From the initial single-cavity profiles to three-cavity and four-cavity profiles, it also promoted the development of plastic doors and windows in Europe and even Asia. According to incomplete statistics, the usage of plastic doors and windows in Germany accounts for 52% of the door and window market, 48% in Austria and 10%-20% in developed countries such as Switzerland, Britain, France and Italy. Plastic windows in the United States began in the late 1970s, and the annual usage growth rate reached more than 15%. At present, Japan, South Korea, Taiwan Province Province, Singapore and Thailand use plastic windows in Asia. Plastic windows in China started late, and calcium plastic doors and windows produced in the 1970s were basically eliminated because of poor quality. The real production of plastic windows began with 1983 using imported equipment. At that time, the technology was not very advanced, and all of them used single-cavity or double-cavity structural profiles. With the improvement of 9 1 industry, a number of manufacturers of extrusion equipment, molds, profiles and assembly equipment have emerged in China. 1996, with the vigorous promotion of the state, the birth of a newly established manufacturer 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, more than 400 profile factories and more than 3,000 assembly plants in China. 1999 The profile production capacity is 800,000 tons, and the annual assembly capacity of doors and windows is 60 million square meters. Now it has become one of the few fast-growing industries in China. Plastic doors and windows are being accepted by users for their excellent performance.