The surface film and the steel plate are isolated from air and moisture, and have the effect of anti-mildew. The underlying metal has good anti-corrosion, anti-acid and alkali resistance. The color film on the surface plays a very good role in thermal insulation, so it is also used in ships, buses and refrigerated vehicles. The walls inside ships have all used metal film-coated panels, and refrigerators and refrigerated vehicles on the market also use film-coated panels. as a wall.