PRODUCTION OF LAMINATED METAL PLATE

摘要

PURPOSE:To produce a thermoplastic resin coated metal plate excellent in close adhesion, processability, corrosion resistance and appearance in a high yield. CONSTITUTION:A press bonding roll 4 is brought into contact with the preheated metal plate 1 wound around a winding roll 4 and a molten thermoplastic resin 3 flows down to the gap between a press bonding roll 4 and the metal plate 1 from a T-die 2 through an extruder to coat the metal plate 1 and the coated metal plate 1 is cooled to be taken up. The width of the flowing-down resin film is made larger than that of the metal plate 1 and the entire width of the metal plate 1 is coated by the central part in the lateral direction of the thermoplastic resin film and air is injected from the holes opened to the surface of the winding roll 4 to prevent the close adhesion of the thermoplastic resin film to the winding roll 4. A cooling medium is injected to the surface of the thermoplastic resin film at the part overcoated with the resin 3 or a cooling roll 12 is brought into contact with the resin overcoated part or both end parts of the winding roll 4 at the part overcoated with the resin 3 is precooled.