EASILY ADHESIVE POLYESTER FILM AND FILM ROLL

PROBLEM TO BE SOLVED: To provide an easily adhesive polyester film particularly suitably used for optical use, for reducing a flaw with high transparency and a high quality, and to provide an easily adhesive polyester film roll superior in air bleeding. SOLUTION: In this easily adhesive polyester film, an easily adhesive layer (an A layer and a B layer) is arranged on both sides of the polyester film being a base material, and one easily adhesive layer (the A layer) includes a particle A, and another one easily adhesive layer (the B layer) includes a particle B, and an average particle size Da of the particle A and an average particle size Db of the particle B satisfy the relationship of Da>Db, and the area occupation ratio Fa of the particle A in an A layer surface and the area occupation ratio Fb of the particle B in a B layer surface satisfy the relationship of 0.3%≤Fa≤Fb≤1.4%. COPYRIGHT: (C)2010,JPO&INPIT