Patent ID: 7264866

Claim:
A laminated film comprising a base material layer, an easily adhering layer and a hard coating layer, wherein the easily adhering layer is formed on the base material layer and the hard coating layer is formed on the easily adhering layer, and further wherein (1) the base material layer is formed of a polyester resin formed from naphthalenedicarboxylic acid as a main dicarboxylic acid component and ethylene glycol as a main glycol component, (2) the hard coating layer has an ultraviolet absorbing function and has a pencil hardness of H or higher on the hard coating layer surface, and (3) the easily adhering layer is formed of a polyester resin obtained from 50 to 70 mol % of 2,6-naphthalenedicarboxylic acid and 30 to 50 mol % of terephthalic acid or isophthalic acid as a dicarboxylic acid component and from 80 to 95 mol % of ethylene glycol and 5 to 20 mol % of diethylene glycol as a diol component, and the polyester resin of the easily adhering layer has a glass transition temperature of 40 to 100° C., (4) said laminated film has a variation (Δb*) of less than 2.0 between transmittance b* values obtained before and after a 300 hours xenon arc test of said laminated film.