Preparation method of electric-conduction polyimide film
A technology of polyimide film and polyamic acid resin, which is applied to conductive materials dispersed in non-conductive inorganic materials, etc., can solve problems such as no progress, and achieve the effects of fast heating speed, easy dispersion and uniform power distribution.
Active Publication Date: 2010-04-28
NINGBO JINSHAN NEW MATERIAL
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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
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[0021] The following are specific embodiments of the present invention and in conjunction with the accompanying drawings, the technical solutions of the present invention are further described, but the present invention is not limited to these embodiments.
[0022] Such as figure 1 As shown, the principle on which the preparation method is based is that both the conductive metal powder and the conductive carbon powder are conductive materials and are easy to disperse, so the nano-scale conductive metal powder and carbon powder are evenly dispersed in the polyamic acid resin, and then passed through the salivation process. And imidization treatment to make a film with good electrical conductivity and mechanical properties. The preparation method is as follows: Step 1: Put the conductive nanoparticles in an organic solvent and pre-disperse them after high-temperature treatment in a high-shear disperser, so that the surface of the conductive particles is covered with a layer of o...
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Abstract
The invention provides a preparation method of an electric-conduction polyimide film, comprising the following steps: step one: electric-conduction nano particles are placed in organic solvent for being dispersed in advance; step two: polyamic acid resin is polymerized in advance; step three: the electric-conduction nano particles and the polyamic acid resin are stirred in a reaction vessel for uniformly dispersing the electric-conduction nano particles in the resin and carrying out polymerization reaction; step four: the polyamic acid resin is pressed in a defoaming kettle to defoam the resin; step five: the polyamic acid resin is salivated into a polyamic acid film; step six: the polyamic acid film is placed in an imine furnace for carrying out imidization treatment; step seven: the film is flattened and coiled and then is cut. In the invention, the nano electric-conduction metal powder and carbon powder are uniformly dispersed in the polyamic acid resin, the film produced by the invention has high mechanical property and good electrical conductivity when being used as flexible electrical heating film material; in addition, the film has the remarkable advantages of rapid temperature rise and wide using temperature range.
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...
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IPC IPC(8): C08L79/08C08K9/10C08K3/08C08K3/04C08G73/10H01B1/22H01B1/24
Inventor 岑建军
Owner NINGBO JINSHAN NEW MATERIAL
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