Patent ID: 8778484
Filing Date: 2014-07-15
Classification: B32B,G02B,Y10T

Abstract:
1. A laminated polyester film comprising: a layer (layer S) of polyester; and a layer (layer C) comprising a polyester resin (A) having a fluorene backbone coated on a surface of layer S, wherein 1) a surface of said layer C has an adhesive index after a heat and wet test of 3 to 5, 2) said polyester resin (A) either contains no dicarboxylic acid component having a sulfonate group or contains dicarboxylic acid component less than 0.1 mol % relative to the dicarboxylic acid component that constitutes the polyester resin (A) and 3) said polyester resin (A) contains a dicarboxylic acid component having a trivalent or higher-valent carboxylic acid component (Aa-4).