Indoor outdoor spraying powder

Indoor outdoor spraying powder is a new data developed in 1960s. Because of its advantages of small pollution, low cost, convenient for mass construction automatic operation of assembly line, it develops rapidly. It is widely used in electrical machinery, instruments, meters national defense equipment. Especially since the 1980s, China's household appliances have been booming, such as freezers, washing machines, electric rice rental, air conditioners, etc. a large number of indoor outdoor spray powder is used to protect decorate their appearance.

Basic principle of electrostatic spraying

High voltage electrostatic sugar powder spraying is to put the powder into the powder barrel (slot) send it to the spray gun by compressed air flow. The high static voltage generated by the high-voltage electrostatic generator is added to the front of the spray gun, which makes the air near the muzzle ionize. Through the nozzle, the powder coating carries negative charge in the ionized air, forms an electric field with the ground object, adheres to the surface of the object by electrostatic attraction. When the film reaches a certain thickness, electrostatic repulsion will occur the adsorption will continue. Thus, a certain thickness (up to 100 microns at a time) uniform film lifting can be obtained.

The main difference between indoor outdoor powder is that it has different weathering resistance. The anti ultraviolet anti-aging function of outdoor powder is better than indoor powder. If indoor powder is used for spraying outdoor workpieces, the coating will appear discoloration powdering. Outdoor powder has higher requirements than indoor powder, because the indoor environment is relatively stable, outdoor because of sunshine, rain other factors, so it should be resistant to temperature difference, high color fastness, easy to crack so on.