Composite aramid paper with high dielectric property

Abstract

The invention provides composite aramid paper with high dielectric property. The composite aramid paper comprises more than two layers of single-layer aramid paper, and the single-layer aramid paper is combined into a whole through a high-temperature-resistant adhesive layer containing inorganic nanofiller to form the composite aramid paper. The preparation method comprises the following steps: blending the high-temperature-resistant adhesive, an inorganic nano filler, a diluent and a dispersing agent, stirring at a high speed, uniformly dispersing, preparing a high-temperature-resistant adhesive solution, uniformly spraying the prepared high-temperature-resistant adhesive solution to a to-be-bonded surface of single-layer aramid paper, baking to volatilize a solvent, bonding the surfaces of more than two layers of single-layer aramid paper, and carrying out hot rolling to form a whole. According to the composite aramid paper, the paper contains the inorganic nano material layer in a bonding manner, and the inorganic nano material has the effects of inhibiting space charge aggregation in insulation paper, reducing the movement rate of current carriers and weakening overload pulse voltage so that the composite aramid paper has corona resistance of pulse voltage resistance and higher breakdown strength, and the insulation protection performance and the service life of a motor insulation system can be greatly improved.

Description

technical field [0001] The invention relates to a composite aramid paper, in particular to a high dielectric performance composite aramid paper. Background technique [0002] During the operation of electrical equipment such as motors, the combined effects of electrical, thermal, mechanical and environmental factors caused by pulse overvoltages will cause rapid aging of the insulation materials of the stator winding turns and breakdown to destroy the insulation of the motor. The motor insulation system can prolong the service life of the motor. [0003] Aramid paper is a special fiber paper made by mixing aramid fiber and aramid pulp in a certain proportion. Due to its excellent mechanical, chemical, electrical and physical properties, it is widely used in various types of medium and high voltage motors, reactors, transformers and other electrical appliances. It has been widely used as insulating and protective materials in equipment. [0004] In recent years, with the dev...

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Problems solved by technology

[0008] The above scheme is to add nano-silica and dispersant to the pulp during the beating process of papermaking, so as to achieve the purpose of enhancing the dielectric properties of aramid paper. Easy to wear and pollute the environment

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