Core Viewpoint - The flexible polyimide (PI) film is gaining significant market attention as a key polymer material in high-tech industries such as brain-computer interfaces, semiconductor materials, and advanced packaging, driven by its excellent properties and expanding applications [2][3]. Group 1: Market Overview - PI film, a new type of high-temperature resistant polymer film, is produced from PAA solution and has excellent mechanical, dielectric, and chemical stability, making it crucial for the acceleration of domestic production processes [2]. - The global PI film market was approximately $2.4 billion in 2022 and is projected to reach $4.5 billion by 2032, indicating a strong growth trajectory [4][5]. Group 2: Applications and Innovations - PI film is increasingly used in flexible sensors and electronic skin due to its lightweight and biocompatibility, playing a critical role as an insulating layer in flexible electrodes for brain-computer interfaces [3]. - In the flexible display sector, transparent PI (CPI) film has replaced traditional glass substrates, becoming the mainstream material for high-end display optical covers and substrates, particularly in foldable smartphones and flexible OLEDs [3]. - The film's properties, such as high-temperature resistance and solvent resistance, have made it a preferred choice for flexible perovskite solar cell packaging [3]. Group 3: Industry Players and Developments - Companies like Oke Technology and its subsidiary Jiangxi Youze New Materials are focusing on PI film production, which is essential for flexible printed circuit boards (FPC) and is a core material for flexible copper-clad laminates (FCCL) [5][6]. - Domestic manufacturers, including Ruihua Tai, Times New Materials, and Guofeng New Materials, are enhancing their competitiveness in the PI film market, with Guofeng collaborating with the University of Science and Technology of China to develop new PI materials [6]. - The advancements in domestic PI film production technology and capacity expansion are helping to break foreign monopolies, supporting the self-sufficiency of China's high-tech industries [6].