Patent ID: 7048995

Claim:
A polyester resin produced by polycondensing a dicarboxylic acid component containing an aromatic dicarboxylic acid or its ester-forming derivative as the main component and a diol component containing ethylene glycol as the main component in the presence of at least an antimony compound and a phosphorus compound, via an esterification reaction or an ester exchange reaction, wherein the amount of antimony eluted from the polyester resin upon the immersion of the resin in the form of particles having a number average particle weight of 24 mg in hot water of 95° C. for 60 minutes is not more than 1 μg per 1 g of the polyester resin, as antimony atoms (Sb), and wherein the number of particles of at least 1 μm in the interior of the resin is not more than 20 particles/0.01 mm 3 .