Abstract: Proposed is a composite film including a first film layer attached to an upper surface of a steel member, a second film layer positioned on the first film layer, and a mesh film layer positioned on the second film layer and having a mesh structure. A portion of the mesh film layer is embedded into the second film layer during a heat compression process when the composite film is manufactured. The composite film improves the water resistance, chemical resistance, abrasion resistance, and durability of a steel member when the steel member is coated with the composite film.

Abstract: Proposed is a composite film including a first film layer attached to an upper surface of a steel member, a second film layer positioned on the first film layer, and a mesh film layer positioned on the second film layer and having a mesh structure. A portion of the mesh film layer is embedded into the second film layer during a heat compression process when the composite film is manufactured. The composite film improves the water resistance, chemical resistance, abrasion resistance, and durability of a steel member when the steel member is coated with the composite film.