A kind of preparation method of conductive polyimide film

Abstract

The invention provides a preparation method of a conductive polyimide film, which comprises the following steps: step 1 pre-disperses conductive nanoparticles in an organic solvent, step 2 pre-polymerizes polyamic acid resin; The particles and the polyamic acid resin are stirred in a stirring reactor so that the conductive nanoparticles are evenly dispersed in the resin and participate in the polymerization reaction; the fourth step is to press the polyamic acid resin into the defoaming kettle to remove the air bubbles in the resin, and the fifth step is to The polyamic acid resin is salivated to form a polyamic acid film; the sixth step is to enter the polyamic acid film into an imide furnace for imidization treatment; the seventh step is to flatten the film, roll it up, and perform slitting treatment. The invention uniformly disperses the nano-scale conductive metal powder and carbon powder in the polyamic acid resin, and the film produced by the method is used as the material of the flexible electric heating film, which not only has high mechanical performance, but also has good electrical conductivity, fast heating speed, high temperature The advantages of wide application range are obvious.

Description

technical field [0001] The invention relates to a preparation method of a conductive polyimide film. Background technique [0002] Existing conductive films are generally ink-printed heating films, polytetrafluoroethylene heating films, etc., but these films have the common problems of low mechanical strength, narrow temperature range and low temperature, uneven power, and large temperature fluctuations. However, there is a great demand for electric heating films in the market, such as car seat cushion heating films, which require high strength. At the same time, high-quality heating films are also required in the market. The conductive polyimide film has good electrical conductivity, and the surface resistance can reach 60 ohms / square inch. Coupled with the good thermal stability and physical and mechanical properties of polyimide itself, it has become a popular choice for aerospace, aviation, and microelectronics technologies. And one of the multifunctional materials wit...

AI Technical Summary

Problems solved by technology

The conductive polyimide film has good electrical conductivity, and the surface resistance can reach 60 ohms / square inch. Coupled with the good thermal stability and physical and mechanical properties of polyimide itself, it has become a popular choice for aerospace, aviation, and microelectronics technologies. And one of the multifunctional materials with great research and application value in household appliances, especially in the application of flexible electric heating devices. "Amine film" is the key development direction in the future, but so far there are only some reports on the research on conductive polyimide film, but there is no substantial progress

Images