Pre painted aluminum sheet metal is a color coated aluminum sheet with surface coating coloring treatment, common fluorocarbon color coated aluminum sheet and polyester color coated aluminumsheet. Pre painted aluminium sheet metal is widely used in aluminum composite panels, aluminum veneer, aluminum honeycomb panels, aluminum ceiling, roofing surface, corners, cans, electronic products. Its performance is very stable, not easy to be corroded, the surface layer after special treatment can reach 30 years quality assurance, the weight per unit volume is the lightest among metal materials, color coated aluminum, is currently the most popular a new type of material.
Pre painted aluminum sheet metal types: pre painted aluminum sheet coating is divided into: polyester painted aluminum sheet (PE), fluorocarbon painted aluminum sheet (PVDF). The PVDF painted aluminum sheets have longer service life and higher cost, and it is usually used in outdoor application. The PE painted aluminum sheet have good price and used in indoor decoration and home appliances making, so the PE coated aluminum sheet is more welcomed on the market.
After the surface of the aluminum sheet baked many times to form the polyester coating can form a firmly attached continuous solid film with protective decorative properties. It is a kind of UV-resistant coating, polyester resin is used in the main chain of polymer containing ester bond as a monomer, add alkyd resin, UV absorber according to the gloss and can be divided into matte and high-gloss series. Which can give pre painted aluminum sheet metal rich color, and has good gloss and smoothness, and superior texture and feel, but also can increase the sense of hierarchy and three-dimensional sense. It can protect the objects exposed to the atmosphere and attacked by ultraviolet radiation, wind, rain, frost and snow freezing; the coating can play a protective role due to temperature difference, freeze-thaw cycle, corrosive gas and microorganism, especially suitable for indoor decoration and advertising board.