公开(公告)号：US20230294347A1

公开(公告)日：2023-09-21

申请号：US18324120

申请日：2023-05-25

Applicant: NAN YA PLASTICS CORPORATION

Inventor： Wen-Cheng YANG ,  TE-CHAO LIAO ,  HAO-SHENG CHEN ,  Chien-Chih LIN

IPC: B29C48/19 ,  B29C48/40 ,  B29B7/14 ,  C08J3/22 ,  B32B27/08 ,  B32B27/20 ,  B32B27/36

CPC classification number: B29C48/19 ,  B29C48/40 ,  B29B7/14 ,  C08J3/22 ,  B32B27/08 ,  B32B27/20 ,  B32B27/36 ,  B29K2067/00

Abstract: A method for producing a polyester film is provided. The method includes a resin alloy master batch preparation step and a film forming step. The resin alloy master batch preparation step includes melting and kneading a high temperature resistant resin material and a polyester resin material with a twin-screw granulator, and then forming a plurality of resin alloy master batches. In the resin alloy master batch preparation step, a twin-screw temperature of the twin-screw granulator is between 250° C. and 320° C., and a twin-screw rotation speed of the twin-screw granulator is between 300 rpm and 800 rpm. The film forming step includes melting and extruding the resin alloy master batches with to form a polyester film. The polyester film includes a heat resistant layer formed of the plurality of resin alloy master batches so that the heat resistant layer includes the high temperature resistant resin material and the polyester resin material.