公开(公告)号：US11806909B2

公开(公告)日：2023-11-07

申请号：US17320247

申请日：2021-05-14

Applicant: NAN YA PLASTICS CORPORATION

Inventor： Wen-Cheng Yang ,  Chen An Wu ,  Chun-Cheng Yang ,  Chia-Yen Hsiao

IPC: B29C48/00 ,  B29C48/88 ,  B29C55/14 ,  B29C55/18 ,  B29K67/00 ,  B29K105/26

CPC classification number: B29C48/0018 ,  B29C48/022 ,  B29C48/9165 ,  B29C55/146 ,  B29C55/18 ,  B29K2067/00 ,  B29K2105/26 ,  B29K2995/0041 ,  B29K2995/0053

Abstract: A biaxially oriented polyester film having the following physical property is provided: when cooled from the molten state at a cooling rate of 20° C./min, an observed recrystallization temperature is 175° C.-200° C. The biaxially oriented polyester film is formed by a thick sheet before bidirectional stretching that is melted and extruded by an extruder and then cooled and formed on a casting roll. The thick sheet before stretching having the following physical property as analyzed by differential scanning calorimetry: a crystallization rate is less than 10%.

公开(公告)号：US20220193971A1

公开(公告)日：2022-06-23

申请号：US17320247

申请日：2021-05-14

Applicant: NAN YA PLASTICS CORPORATION

Inventor： Wen-Cheng Yang ,  Chen An Wu ,  Chun-Cheng Yang ,  Chia-Yen Hsiao

IPC: B29C48/00 ,  B29C48/88 ,  B29C55/18 ,  B29C55/14

Abstract: A biaxially oriented polyester film having the following physical property is provided: when cooled from the molten state at a cooling rate of 20° C/min, an observed recrystallization temperature is 175° C-200° C. The biaxially oriented polyester film is formed by a thick sheet before bidirectional stretching that is melted and extruded by an extruder and then cooled and formed on a casting roll. The thick sheet before stretching having the following physical property as analyzed by differential scanning calorimetry: a crystallization rate is less than 10%.