POLYESTER RESIN

摘要

The present invention is a polyester resin which is obtained by using an aluminum compound and a phosphorus compound as the polymerization catalyst and which comprises at least 85mol% of ethylene terephthalate structural units, wherein the content of aluminum-based foreign matter is 100ppb or less and the content of phosphorus compounds represented by a specific structure is 5 to 11ppm, each being relative to the mass of the polyester resin. Thus, the present invention can provide, by commercial-scale continuous polymerization, a polyester resin which has the following characteristics: a molded product of the polyester resin exhibits high transparency; and when the molded product is a heat-resistant bottle, the crystallization of the neck finish portion can be easily controlled, while when the molded product is a sheet for forming, the sheet is less susceptible to whitening when heated during the forming.