Polyester resin composition and polyester film using the same

摘要

Provided are a polyester resin composition having less internal defects, by controlling the metal content in a catalyst and the metal content in an electrostatic pinning agent at the time of manufacturing a polyester resin, and a polyester film using the same.

主权项

1. A polyester resin composition comprising a catalyst, an electrostatic pinning agent, and a phosphorous compound as a heat stabilizer,
wherein a metal content in the catalyst is 50 to 150 ppm per 100 parts by weight of the polyester resin composition, wherein a metal content in the electrostatic pinning agent is 10 to 25 ppm per 100 parts by weight of the polyester resin composition, and a content of phosphorus element in the phosphorous compound is 24 ppm or less per 100 parts by weight of the polyester resin composition, said phosphorous compound and said electrostatic pinning agent satisfying the following Equation 1:
0.5≦[P]/[Me]≦1.5  [Equation 1] wherein [P] means the equivalent of phosphorus in the phosphorous compound, and [Me] means the total equivalent of a metal in the electrostatic pinning agent and wherein the polyester resin composition has a melt resistance of 2 to 8 MΩ and a resin color expressed as b value of 4.0 or less.