Polytetrafluoroethylene film for capacitor

Abstract

The invention discloses a polytetrafluoroethylene film for a capacitor. The polytetrafluoroethylene film is prepared from the following components in parts by weight: 100-120 parts of polytetrafluoroethylene, 10-12 parts of triethanolamine, 2-5 parts of polyvinylidene fluoride, 1-4 parts of calcium stearate, 20-24 parts of polyoxyethylene lauryl ether, 10-12 parts of polyacrylamide, 2-6 parts of glycerin monostearate, 0.5-1.5 parts of phenylacetophenone, 1-3 parts of diisopropylbenzene hydroperoxide and 4-9 parts of a film-forming agent. The components of the polytetrafluoroethylene film disclosed by the invention have a synergistic effect. Primarily based on polytetrafluoroethylene, the tensile property of the polytetrafluoroethylene film is comprehensively improved and the service life of the polytetrafluoroethylene film is prolonged by adding triethanolamine, polyvinylidene fluoride, calcium stearate, polyoxyethylene lauryl ether, polyacrylamide, glycerin monostearate, phenylacetophenone, diisopropylbenzene hydroperoxide and a film-forming agent.

Description

Technical field: [0001] The invention relates to a polytetrafluoroethylene film for capacitors, belonging to the technical field of electronic components. Background technique: [0002] In the prior art, capacitors made of polypropylene film are mostly used, because of their significant advantages such as low thermal shrinkage, stable performance, high temperature resistance, high pressure resistance, and prevention of breakdown, the use of capacitors made of polypropylene film is increasing. wider. Since the whole machine in the market is oriented towards ultra-thin and micro-miniature development, although the polypropylene film foil composite material has a strong current-carrying and electric resistance capacity, its disadvantage is that it is large in size and is not conducive to the assembly of the machine. Another disadvantage is that polypropylene It is difficult to control the process of compound rolling of film and aluminum foil, especially in the process of windi...

AI Technical Summary

Problems solved by technology

Since the whole machine in the market is oriented towards ultra-thin and micro-miniature development, although the polypropylene film foil composite material has a strong current-carrying and electric resistance capacity, its disadvantage is that it is large in size and is not conducive to the assembly of the machine. Another disadvantage is that polypropylene It is difficult to control the process of compound rolling of film and aluminum foil, especially in the process of winding the core, due to the difference in hardness and toughness of the two materials, there will be a gap between the film and foil, so that the heat shrinkage of the material is not sufficient when setting the shape, resulting in The film and foil are easily broken down by electricity, and the scrap rate is high, resulting in waste of cost

And because the raw material impurities used in the preparation of the capacitor metallized film in the prior art are more, so the performance of the produced capacitor metallized film will be poor, and it is likely to cause the tearing of the film, which will affect the normal production