Patent ID: 7815976

Claim:
A manufacturing method of an organic-resin coated metal sheet, the manufacturing method comprising the steps of: continuously extruding an organic resin in a molten state by heating from a T-die in a film shape onto an elongated strip-shaped metal sheet; dropping a molten resin on pre-rolls arranged between the T-die and lamination rolls and bringing the molten resin into contact with the pre-rolls; and pressing the molten resin and the metal sheet by lamination rolls thus manufacturing the organic-resin coated metal sheet, wherein electric conductive bodies are arranged parallel to the widthwise direction of the pre-rolls, and the molten resin is dropped onto the pre-rolls in a state that an electric current is supplied to the electric conductive bodies at predetermined time intervals thus bringing the molten resin into contact with surfaces of the pre-rolls by electrostatic pinning whereby an oligomer adhered to the pre-rolls is transferred to a surface of the molten resin and is removed.