Electrostatic spraying process of LY pvcprofile

Electrostatic spraying generally needs to be sprayed 2-3 times, and the color should be at least one kilogram. In Germany, spraying is generally only done in window factories and almost not in profile factories. After electrostatic spraying, the interface of window corner welding will turn black due to high temperature during welding. There is a kind of paint that will not turn black during welding, but the price is too expensive. Electrostatically sprayed products are not wear-resistant and will soon lose luster, especially when the color is dark for a period of time, it will be better to add some oil on the surface, but it will fade faster than the film. The spraying thickness is generally only 10um thick. In principle, a layer of PMMA can also be coated, but the coating thickness is only 20m. Moreover, few people can also spray aluminum alloy profiles, but the process is different. Aluminum alloy spraying is a powder spraying, The pigment powder is wrapped into particles by a material. The surface temperature of the aluminum alloy is very high. When the particles are sprayed on the aluminum alloy, they will melt and the surface will be painted with color. The weather resistance of electrostatic spraying products is poor, and the color is not obvious in the deep, but the change in the light is obvious in a few years. For example, the signs of German railways are electrostatic sprayed into various colors, and the color turns black after a few years.
The spraying process requires both ambient temperature and humidity, because in the high-speed air flow during spraying, the local temperature suddenly cools, and the water molecules in the air quickly condense into fine water droplets. It is attached to the profile with the coating, which forms granules under the coating layer and cannot be removed.