Polyimide colorless transparent film, preparation method and application thereof

• Main Authors: JIN YING, ZENG CAIPING, XUE CHI
• Format: Patent
• Language: Chinese; English
• Published: 06.11.2020
• Subjects: ADVERTISING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; CRYPTOGRAPHY; DISPLAY; DISPLAYING; EDUCATION; GENERAL PROCESSES OF COMPOUNDING; LABELS OR NAME-PLATES; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PHYSICS; SEALS; SIGNS; THEIR PREPARATION OR CHEMICAL WORKING-UP; WORKING-UP

The invention provides a polyimide colorless transparent film and a preparation method thereof, and an optical PI film. The polyimide colorless transparent film not only has excellent light transmittance (greater than or equal to 85%@500 nm), but also has the characteristics of high modulus (tensile modulus greater than or equal to 3.8 GPa), low thermal expansion coefficient (less than or equal to30 ppm/DEG C, 50-200 DEG C) and the like, and can meet the use requirements of flexible photoelectric display devices. 本发明提供一种聚酰亚胺无色透明薄膜及其制备方法、光学PI膜。所述聚酰亚胺无色透明薄膜不但具有优良的透光性(≥85％@500nm)，同时具有高模量(拉伸模量≥3.8GPa)、低热膨胀系数(≤30ppm/℃，50-200℃)等特点，可满足柔性光电显示器件的使用需求。