| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a method for manufacturing a polyester film-coated metallic sheet which shows excellent economy and superb plate working properties because the possibilities of an neck-in phenomenon during melt-extrusion are low and a foreign substance is hardly generated in an obtained molten resin film and a hardly deteriorated impact resistance in heating for an outer face baking finish performed for the purpose of making the appearance of a metallic can presentable after plate working and is best-suited for the metallic can receiving a hot water sterilization. <P>SOLUTION: In the manufacturing method for coating one side of the metallic sheet with a film (A) composed mainly of a crystalline polyester with a melting point of 180°C or higher and the other side with a film (B) consisting of a crystalline polyester with a melting point of 180°C or higher, the resin films (A) and (B) obtained by cooling/setting the molten resin film extruded in a laminar fashion under the state that olefin polymer flows join at both end parts of a T-die, are uniaxially stretched in a longitudinal direction, then the stretched resin films (A) and (B) are thermally set and the polyester films (A) and (B) are obtained by cutting/removing both end parts as one process. The polyester films (A) and (B) are laminated on the metallic sheet heated in a separate process as the other process. <P>COPYRIGHT: (C)2004,JPO</p> |
