BIAXIALLY ORIENTED POLYESTER FILM TO BE AFFIXED ON WINDOW

摘要

PROBLEM TO BE SOLVED: To provide a film to be affixed on a window which regulates a solar radiation transmission by properly shielding an infrared region as well, is colored or colorless, and is excellent in transparency. SOLUTION: This biaxially oriented polyester film comprises at least three layers of a co-extruded laminate polyester film which has an intermediate layer containing 0.01 to 10 wt.% of a near infrared ray absorbing agent that has an absorption peak at a wavelength of 780 to 1200 nm.