公开(公告)号：US20250136750A1

公开(公告)日：2025-05-01

申请号：US18836431

申请日：2023-01-11

Applicant: TORAY ADVANCED MATERIALS KOREA INC.

Inventor： Song Jung HAN ,  Dohyun KIM

IPC: C08G63/183 ,  C08G63/85 ,  C08J5/18 ,  C08K5/521

Abstract: The present invention enables a polycondensation reaction of polyester at a low temperature to lead to an improvement in thermal stability as well as a high degree of polymerization in a polyester resin, so that a polyester resin with a minimized end group (carboxyl group) and a small content of foreign matter can be produced. In addition, when a film is manufactured using the polyester resin, a film with a uniform thickness can be produced because no gap is formed between the drum surface and a sheet-like product even at a high rotational speed due to an excellent electrostatic application property and a small melt specific resistance of the polyester resin, and a film with high transparency can be produced due to a small content of foreign matter.