BIAXIALLY ORIENTED UV-RESISTANT SINGLE OR MULTILAYER POLYESTER FILM HAVING ANTIREFLECTIVE COATING (ANTIGLARE) ON ONE SURFACE AND HAVING TRANSMITTANCE OF AT LEAST 93.5

摘要

PROBLEM TO BE SOLVED: To provide a biaxially oriented polyester film having a high transmittance for rays of at least 93.5%, which shows no significant yellowing or no brittleness or cracks on a surface and is free from degradation in mechanical and optical properties that may cause troubles in use, even when the film is used outdoors for a number of years.SOLUTION: The polyester film comprises: a single-layer or multilayer base polyester film; an antireflective film disposed on an A side surface of the base polyester film; and an antireflective film the same as the antireflective film disposed on the A side or another antireflective outer layer, disposed on a C side surface opposite to the A side surface. The antireflective film or another antireflective outer layer disposed on the C side surface has a refractive index lower than the refractive index of the base polyester film. All layers of the base polyester film contain a UV stabilizer. The polyester film has a ray transmittance of at least 93.5%.SELECTED DRAWING: None