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公开(公告)号：US11745470B2
公开(公告)日：2023-09-05
申请号：US16863602
申请日：2020-04-30
发明人： Gun Uk Kim , Young Min Heo , Sechul Lee , Sang Min Choi
CPC分类号： B32B17/10 , B32B27/08 , B32B27/281 , B32B27/36 , C08G63/065 , C08J5/18 , H05K5/0017 , H05K5/03 , B32B2307/412 , B32B2457/20 , C08J2367/03
摘要： The polyester film according to the embodiment can maintain its original characteristics even after a plurality of repeated folding by adjusting the deformed dimension as compared with the initial dimension of the film, in particular, by adjusting the ratio between the deformed dimensions in two in-plane directions perpendicular to each other to a specific range, in the cycle of straining and relaxing the film. Accordingly, the polyester film can be applied to a cover of a flexible display device, in particular, a foldable display device to exhibit excellent characteristics.
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公开(公告)号：US11820893B2
公开(公告)日：2023-11-21
申请号：US16913051
申请日：2020-06-26
发明人： Jung Hee Ki , Sunhwan Kim , Han Jun Kim , Dae Seong Oh , Jin Woo Lee , Sang Hun Choi , Gun Uk Kim
IPC分类号： C08L79/08 , C08G69/46 , C08G73/10 , B29C48/08 , B29C48/00 , B29C55/02 , B29K79/00 , B29K77/00
CPC分类号： C08L79/08 , B29C48/0018 , B29C48/08 , B29C55/026 , C08G69/46 , C08G73/1028 , B29K2077/00 , B29K2079/08 , C08L2203/16
摘要： Embodiments relate to a polymer film that is excellent in folding characteristics and transparency and maintains excellent mechanical properties even after repeated elongation and shrinkage in the elastic region, a process for preparing the same, and a front panel and a display device comprising the same. The polymer film comprises a polymer resin selected from the group consisting of a polyamide-based resin and a polyimide-based resin and has an MOR0/9 of Equation A of 2% or less.
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