Polyimide is a kind of macromolecule polymer containing cyclic imide group in molecular chain. (Polyimide, referred to as PI).Polyimide is a kind of macromolecule polymer containing cyclic imide group in molecular chain. Recently, the research, development and utilization of polyimide have been listed as one of the most promising engineering plastics in the 21st century. Polyimide material has excellent high temperature resistance, low temperature resistance, high strength and high modulus, high creep resistance, high dimensional stability, low thermal expansion coefficient, high electrical insulation, low dielectric constant and loss, radiation resistance, corrosion resistance and other advantages. At the same time, it has the characteristics of low vacuum volatility, less volatile condensate and other space materials. It can be processed into polyimide film, high temperature resistant engineering plastics, composite materials. Matrix resins, heat-resistant adhesives, fibers and foams are widely used in many high-tech fields, such as aerospace, microelectronics, precision machinery and medical devices.
Polyimide is one of the earliest and most mature applications of polyimide materials.
1) Application of Polyimide Film in High Speed Traffic
It can be used for high-speed motor insulation in high-speed train, PI insulation film of motor and so on. The reason why the fast-developing high-speed railway generator can operate safely and smoothly is that the insulation system of motor uses high-performance polyimide film insulation material.
2) Application of Polyimide Film in New Energy Field
Because of its outstanding high temperature resistance and insulation performance, polyimide can be used in new power batteries, battery diaphragms for high-power electric vehicles, insulation of variable frequency motor for wind power generation and other new energy sources.
3) Application of Polyimide thin films in space exploration
It can be used in space station solar panels, satellite multi-layer thermal blanket, solar sail surface, space panel heater and so on.
4) Application of Polyimide Thin Film in Electronic Information
Because of its soft, dimensional stability and excellent dielectric properties, polyimide film can be used for flexible printed circuit boards, flexible IC packaging substrates and automatic welding of carrier tapes.