Aluminum alloy are a kind of metal raw materials which widely used in modern industrial and construction industries. The reason why it has such a wide application space is that it has a great relationship with its own superior performance. They have such advantages : 1.The aluminum alloy is lighter than other common metals, light in weight, and has a density of only 2.70g/cm3, which is 1/3 of copper or iron. It does not need to consider the required load capacity during use. 2.The aluminum profile is treated by hot and cold processes in the production process, and has strong corrosion resistance. 3.Aluminum profiles have good ductility, can be made with many metal elements light alloy, high quality materials. 4.Compared with other metal materials, aluminum profiles have strong plasticity and good productivity, and have good advantages for production. 5.Aluminum profiles have good casting properties, can be processed into aluminum profiles of different shapes. 6.The surface treatment performance is good, the appearance of bright color. 7.Chemical properties are stable, non-magnetic, can be recycled and reused, is a benign and recyclable metal material. 8.The coefficient of elasticity is small, the collision friction does not spark, the best performance in the automotive process. 9.Has good thermal conductivity and electrical conductivity, outstanding performance in short-distance transmission. 10.Compared with other metal materials, aluminum profiles have no metal pollution, no toxicity, and there is no volatile metal in the surface oxide layer. There is a plus aluminum profiles called “Insulation broken bridge aluminum”. They are better: The two sides are made of aluminum, and the plastic profile cavity is used as the heat-dissipating material in the middle. This innovative structural design takes into account the advantages of both plastic and aluminum alloys, while meeting the various requirements of decorative effects and door and window strength and durability. It realizes the three-sealing structure of doors and windows, reasonably separates the water vapor chamber, and successfully achieves the pressure equalization of gas and water, and significantly improves the water-tightness and air-tightness of the doors and windows. The air-tightness of the insulated aluminum doors and windows is better than that of any aluminum and plastic windows. It can ensure that the indoor window sill and floor of the area with large wind and sand are free of dust; it can ensure that residents of 50 meters on both sides of the expressway are free from noise.