Polyimide film is a material with excellent high-temperature resistance, high-voltage resistance, corrosion resistance, and electrical insulation properties. As a new type of high-temperature resistant organic polymer film, it is recognized as the best-performing thin-film insulating material globally, boasting outstanding mechanical properties, electrical performance, chemical stability, and high radiation resistance, along with exceptional performance across extreme temperatures (-269 °C to +400 °C). It is now widely used in various fields, including aviation, marine, spacecraft, rockets, missiles, atomic energy, and the electronic and electrical industries.