| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain a resin film coated surface-treated steel sheet which is excellent in quality by improving adhesion of the resin film to the steel sheet by a method wherein an upper layer biaxially oriented rein film layer and a lower layer nonoriented resin film layer are provided by a specific thickness ratio on the surface of the metal sheet. SOLUTION: In a metal sheet 4 on which a resin film layer 3 composed of an upper layer biaxially oriented resin film layer 1 and a lower layer nonoriented resin film layer 2 are coated, the thickness ratio of the nonoriented resin film 2 which is 0.01 or under in double refraction of the nonoriented resin film layer 2 is preferably 40% to 90%. As the biaxially oriented reins film wherein resin coated metal sheet is used as a material for cans for manufacturing a two piece can by drawing, ioning or further stretching, polyethylene, polypropylene, or polymer alloy, etc., are exemplified. Further, in order to raise adhesion to the metal sheet, and adhesion face can be preliminarily coated as primer coat with an adhesive.</p> |
