PPGI is a product made by subjecting coated steel sheets (galvanized, aluminum-zinc, nickel-plated, etc.) to surface chemical treatment (degreasing, phosphating, chromium hydrochloric acid passivation), then coating, and then baking. Advantages: It has the mechanical strength and easy formability of steel plates, as well as the good decorative properties and corrosion resistance of organic materials. The coating has strong adhesion and can maintain a novel color for a long time. It is widely used in various fields such as construction, home appliances, furniture, public facilities and transportation.