Patent ID: 7261934
Filing Date: 2007-08-28
Classification: B32B,C08J,C08K,G02B,Y10T

Abstract:
1. A polyester film which comprises a composition comprising a copolyester and inorganic fine particles in an amount of 30 to 50% by weight based on the composition, the copolyester comprising terephthalic acid as a main dicarboxylic acid component, ethylene glycol as a main glycol component, and at least one member selected from the group consisting of isophthalic acid, naphthalenedicarboxylic acid and cyclohexane dimethanol as a copolymerized component, which has a thermal shrinkage at 85° C. in longitudinal and transverse directions of not higher than 0.7% and a thermal shrinkage at 150° C. in the longitudinal and transverse directions of not higher than 5.0%, which has an average reflectance at a wavelength of 400 to 700 nm of not lower than 90%, which has a thickness of 30 to 250 μm, and which is used as a reflecting plate of a flat panel display.