POLYESTER RESIN, POLYESTER RESIN COMPOSITION, SHEET OR FILM OBTAINED THEREFROM AND HOLLOW MOLDED CONTAINER

摘要

A polyester resin especially suitable for use in optical films, etc. In particular, a resin of alicyclic polyester comprising dicarboxylic acid units and diol units, characterized by satisfying the following requirements: (1) the dicarboxylic acid units are composed mainly of 1,4- cyclohexanedicarboxylic acid units; (2) the diol units are composed mainly of 1,4-cyclohexanedimethanol units; (3) the ratio of alkyl ester terminals to all terminals of the polyester is 5 mol% or less; and (4) the light transmittance of a 2 mm thick plate obtained by molding the polyester resin is 87% or higher.