公开(公告)号：US20240002589A1

公开(公告)日：2024-01-04

申请号：US18216840

申请日：2023-06-30

申请人： SK microworks Co., Ltd.

发明人： Byeong Jae LIM ,  Young Min HEO ,  Chul Kyu KIM

IPC分类号： C08G63/199 ,  C08J5/18

CPC分类号： C08G63/199 ,  C08J5/18 ,  C08J2367/02 ,  B29C48/08

摘要： A polyester film according to an embodiment includes a polyester resin. The polyester resin includes a repeating unit having a cyclohexane skeleton and a repeating unit having a benzene ring. The polyester film has a base peak related to bending vibration of the benzene ring and a first peak related to C—O stretching vibration in a spectrum measured using a Fourier transform infrared spectrometer (FT-IR). The base peak is a peak at a wavenumber of 788 cm−1 to 798 cm−1. The first peak is a peak at a wavenumber of 1129 cm−1 to 1139 cm−1. The intensity of the base peak and the intensity of the first peak differ by −0.05 to +0.05. According to an embodiment, a polyester resin having a controlled degree of crystallization can be applied to a film to impart excellent heat resistance, mechanical properties, and the like to the film.

公开(公告)号：US20230416478A1

公开(公告)日：2023-12-28

申请号：US18203848

申请日：2023-05-31

申请人： SK microworks Co., Ltd.

发明人： Byeong Jae LIM ,  Young Min HEO ,  Chul Kyu KIM ,  Ki Youn SONG

IPC分类号： C08J5/18 ,  B29C48/00 ,  B29C48/08 ,  B29C48/86

CPC分类号： C08J5/18 ,  B29C48/022 ,  B29C48/08 ,  B29C48/872 ,  C08J2367/02 ,  B29K2067/00

摘要： Disclosed is a polyester film comprising a polycyclohexylenedimethylene terephthalate resin having a degree of crystallinity of 36% or less as measured using a differential scanning calorimeter.