| 摘要 |
PROBLEM TO BE SOLVED: To provide a film for coating a steel plate excellent in corrosion resistance and hardly generating peeling the film from the steel plate even when conducting a retort treatment after restriction molding.SOLUTION: There is provided an unstretched film for coating steel sheet having a first resin layer and a second resin layer and manufactured by a co-extrusion method where the first resin layer contains a crystalline polyester of 85 to 99 wt.% based on the whole first resin layer, wet tensile force according to JISK 6768 of a face contacting with the steel plate is 34 mN/m or more in the first resin layer, the melting point of the resin constituting the first resin layer is 140 to 280°C, the second resin layer contains the crystalline polyester of 70 to 99 wt.% based on the second resin layer and the thickness of the whole film for coating the steel plate is 10 μm to 50 μm. |
