POLYESTER RESIN, AND MOLDED BODY, STRETCHED FILM AND BOTTLE CONTAINING SAID POLYESTER RESIN

摘要

A polyester resin contains a dicarboxylic acid constituent unit and a diol constituent unit, wherein more than 0% by mol and 20% by mol or less of the diol constituent unit is a unit originated from a diol having a cyclic acetal skeleton; 70 to 98% by mol of the diol constituent unit is a unit originated from a diol having an alicyclic skeleton; the diol constituent unit comprises a unit originated from ethylene glycol; 80% by mol or more of the dicarboxylic acid constituent unit is a unit originated from terephthalic acid; and the polyester resin has a physical property indicated by the following (A): (A) the minimum value of the semi-crystallization time is 600 s or less based on a depolarized light intensity method when the polyester resin is melted at 280°C and crystallized at a constant temperature of 150 to 230°C.