| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an easily adhesive polyester film for optical use which is reduced in optical defect, has high transparency and is excellent in adhesion to an optical functional layer and at high temperatures and high humidity. <P>SOLUTION: The easily adhesive polyester film has a coating layer on at least one side of a base material film. The base material film is a polyester film which has a laminated structure of at least three layers by a co-extrusion method, contains inert particles in both outermost layers, and has a haze of 2.5% or below. The coating layer contains a urethane resin containing an aliphatic polycarbonate polyol as a constituent and a crosslinking agent as main components. In the infrared spectroscopy spectrum of the coating layer, the ratio (A<SB>1460</SB>/A<SB>1530</SB>) between absorbance (A<SB>1460</SB>) in the vicinity of 1,460 cm<SP>-1</SP>deriving from an aliphatic polycarbonate component and absorbance (A<SB>1530</SB>) in the vicinity of 1,530 cm<SP>-1</SP>deriving from a urethane component is 0.40-1.55 in the easily adhesive polyester film for optical use. <P>COPYRIGHT: (C)2011,JPO&INPIT |
