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In the late 1980s, doors and windows were made of aluminum alloy profiles, which solved some of the shortcomings of steel windows. However, the profile itself is made of metal materials, and the heat and cold conduction is fast. The K value of the whole window of steel windows and aluminum alloy windows is above 6.0w/(m2.K), which does not fundamentally solve the problems of sealing and insulation. Although it can be equipped with hollow glass, the K value of the whole window can only reach about 4.5w/(m2.K).
In the mid-to-late 1990s, the thermal break aluminum alloy doors and windows appeared in the market, which became high-end products in the door and window market at that time. High-strength insulation synthetic materials are used in the profile design, and high-tech technologies such as powder coating, fluorocarbon spraying and resin hot printing are used for surface treatment. It can meet the ever-changing needs for color matching.
The outstanding advantages of the thermal break aluminum alloy doors and windows are light weight, high strength, good watertightness and airtightness, good fire resistance, large lighting area, atmospheric corrosion resistance, long service life, good decorative effect and good environmental performance.
However, as people’s quality of life improves, they pay more and more attention to health, environmental protection and energy saving. Thermal break aluminum alloy windows and plastic steel windows cannot match the interior decoration, meet the aesthetics of modern people, and do not conform to the national energy-saving climate.
