Aramid fiber non-woven paper production process

Abstract

The invention discloses an aramid fiber non-woven paper production process. The production process comprises the following steps of firstly preparing aramid fiber non-woven fabric from aramid fibers through a spunlace entanglement process, and then carrying out high-temperature pressurization processing to form the aramid fiber non-woven paper. The aramid fiber non-woven paper is prepared from the aramid fibers at high temperature and high pressure, and the aramid fibers have excellent performances of ultrahigh strength, high temperature resistance, insulation, aging resistance, long service life and the like, so that the aramid fiber non-woven paper prepared from the aramid fibers has the characteristics of high temperature resistance grade, high strength and long service life; and the use requirements of novel voltage transformation and new energy automobile driving motors can be met.

Description

technical field [0001] The invention relates to the technical field of preparation of special materials, and more specifically relates to a production process of aramid nonwoven paper. Background technique [0002] Insulating materials are non-conductive materials under the allowable voltage, but they are not absolutely non-conductive materials. Under a certain applied electric field strength, processes such as conduction, polarization, loss, and breakdown will also occur, and long-term use will also cause aging. , and its resistivity is very high, usually in the range of 1010~2020Ω·M. As in an electric motor, the insulating material around the conductors isolates the section and isolates it from the grounded stator core to ensure safe operation of the motor. Conventional insulating paper refers to the use of insulating fiber products as the substrate, which is made of insulating varnish. It has certain insulating properties, but its heat resistance is low (below H level), ...

AI Technical Summary

Problems solved by technology

Conventional insulating paper refers to the use of insulating fiber products as the substrate, which is made of insulating varnish. It has certain insulating properties, but its heat resistance is low (below H level), and it is easy to age, so the service life is short ( 1 to 3 years)

The H-grade heat-resistant insulating paper can only be made of asbestos, glass fiber and other materials, and the heat-resistant grade can reach C-grade, but the mechanical strength and service life will be affected by changes and the development of motor technology for new energy vehicles. The heat resistance level must be above C level, and the service life is required to be more than 10 years. The ordinary insulators in the prior art can no longer meet the above requirements.

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