Are aluminum profiles painted by powder or by fluorocarbon spray? How can they be distinguished from appearance?
The biggest weakness of powder spraying is that it is afraid of the ultraviolet radiation of the sun. The long-term radiation will cause the natural fading. The face of the aluminum plate and the non bright face are obviously different in color after a few years, and the color difference is obvious for 2-5 years. Now appearing on the market name of color for aluminum, aluminum doors and windows, is to use ordinary aluminum powder coating and. Aluminum doors and windows to increase color varieties, but also to enhance corrosion resistance. Another kind of electrostatic spraying liquid spraying, also called fluorocarbon spraying called curium oil, Hongkong. Belonging to high-grade spraying, higher prices, has long been applied in foreign countries. In the past two years, it has been widely used in aluminum curtain wall. Because of its excellent characteristics, more and more attention has been paid to the construction industry and users. Fluorocarbon coating has excellent anti fade, anti frost, anti air pollution (acid rain) corrosion, anti UV ability, strong crack resistance and can withstand harsh weather conditions. Is less than general paint
The surface treatment of the curtain wall aluminum plate is solved by electrostatic spraying, not only the color difference becomes smaller, but also the aluminum plate with various colors can be obtained. Electrostatic spraying can be divided into powder spraying and fluorocarbon spraying. The raw materials of powder spraying are polyurethane, polyurethane resin, epoxy resin, hydroxyl polyester resin and epoxy / polyester resin, which can be made into many colors. The characteristics of powder spraying: spraying equipment manual, automatic hanging type, simple construction, the thickness of the coating is 30 micron, impact resistance, abrasion resistance, corrosion resistance, weather resistance are good, the price cheaper than fluorocarbon coatings.
Aluminum surface treatment for many years, are anodized. In order to be able to achieve a strong film and shiny colors, the domestic and foreign brands of aluminum alloy used to make aluminum doors and windows profiles, have made a serious choice, and finally select 6063 alloy (China as LD31). The alloy extrusion performance characteristics: easy extrusion, medium strength, the key is to have good oxidation resistance, to aluminium profile a good decorative surface. This shows that the oxide film is easy to generate and has high fastness. Oxide film thickness and color difference can be controlled, coloring, adhesion and luster. But the oxidation coloring color only has the white and the bronze color, the color is monotonous. Because the oxidation process involves cleaning, oxidizing, coloring and sealing the aluminum in the oxidation bath. The bath is prepared by a variety of chemical elements, each of a group of chemical composition of aluminum oxide, the bath in the bath is changing, so the variable value, there is always out of aluminum oxide coloring color, individually placed naked eye is not obvious, such as large area together, is very obvious difference show. Therefore, the aluminum curtain wall must not use oxygen extremely positive treatment. Otherwise, the aluminum curtain wall will be very ugly, Chongqing city center trade building is an example.