Patent ID: 7312276

Claim:
A resin film comprising a polyester resin (A) having an intrinsic viscosity of 0.5-2.0 dl/g, an elastomer resin (B) and a vinyl polymer (C) containing at least 1 wt % of a unit with ethylene and a polar group, wherein components (A), (B) and (C) are melt-mixed, and having a structure wherein the elastomer resin (B) is finely dispersed in the polyester resin (A) and at least a portion of the elastomer resin (B) is capsulated by the vinyl polymer (C); wherein said resin film is laminated on a metal sheet, and wherein each particle of the elastomer resin (B) finely dispersed in the polyester resin (A) has a volume no greater than a sphere having a diameter of 1 μm.