Knowledge

The treatment process of curtain wall aluminum sheet panels can be divided into two methods, one is anodizing and the other is electrostatic spraying. The anodized oxide film is generally above 12μ, and the color is only two kinds of bronze and white. The color is monotonous. The more serious disadvantage is that the color of each  aluminum sheet panels surface is different. Many curtain wall panels are combined to form an overall curtain wall effect. Very ugly. This shortcoming can be said to be impossible to eliminate. It is not caused by the production technology, but because the aluminum plate is not made of batch numbers, and there are small differences in chemical composition. In addition, factors such as the current density of the electrolytic bath during oxidation cannot be completely the same, so The color after oxidation is somewhat different. It may not be obvious from a single sheet, but it is very obvious if they are all lined up together. Therefore, the surface treatment of the aluminum sheet of the aluminum plate curtain wall must not be anodized.

Another method of surface treatment of curtain wall aluminum sheet panels is electrostatic spraying. Spraying is divided into powder spraying and liquid spraying. Powder spraying materials are mainly: polyurethane, swelling resin, epoxy resin and other raw materials are matched with high color retention pigments, and dozens of different colors of spraying powder can be obtained. The sprayed powder is resistant to collision and abrasion. Under the impact of 50 kg, the aluminum sheet is deformed, the sprayed layer has no cracks, no layer drop, intact and undamaged, and it is resistant to dilute acid and mortar. The shortcomings are afraid of long-term exposure to ultraviolet rays, and the color of the yin and yang may be different after a few years. The spray powder produced by many domestic manufacturers has great weight differences. After hanging on the wall, some powders containing gold chips will change with the angle of sunlight during the day and dusk, and the color of the wall will be different. The use of powder spray paint hopes to attract attention.