| 摘要 |
Provided is a pre-coated metal plate comprising: a metal plate; an underlying film layer which does not contain chromate and which is provided on the metal plate; a primer film layer which does not contain chromate and which is provided on the underlying film layer; and a top film layer which is provided on the primer film layer. The fracture critical elongation rate of a film layer, which is a combination of the primer film layer and the top film layer, is 10-25%. The glass transition temperature of the primer film layer is greater than 50ºC but no more than 100ºC. The top film layer contains a resin component and the resin component contains an acrylic resin or a polyester modified acrylic resin. When the pre-coated metal plate is subjected to 2T close contact bending, a total of 5-30 cracks having a width of no more than 0.1mm are generated in the top film layer, in a range centered on the vertex section of the bend and having a length of 1mm in a direction orthogonal to the bending direction. |
