Mica paper tape with high wear resistance and aging resistance and preparation method thereof

Abstract

The invention discloses a mica paper tape with high wear resistance and aging resistance. The paper tape comprises a mica paper base tape, wherein a reinforcing film layer is formed on the surface ofone side or two sides of the mica paper base tape through an adhesive layer in a hot pressing manner; the reinforcing film layer is a mixture of novolac epoxy resin and polyimide resin in any proportion, and mixture fibers of modified PMIA / NFC composite fibers and chopped aramid fibers are uniformly mixed in the resin film layer to serve as reinforcing fibers to improve the surface performance ofthe film. During preparation, the modified PMIA / NFC composite fibers are prepared by performing high-speed shearing and dispersion on a mixture of poly(m-phenylene terephthalamide) nano fibers and nano fibrillated cellulose in a proportion in an ultrasonic environment and then performing modification with a silane coupling agent KH550, and are mixed with the chopped aramid fibers, then the obtained mixture is added into the resin raw material to prepare the film, and three-stage hot-pressing curing molding is performed after the film and the mica paper base tape are compounded. Compared with the traditional mica paper tape, the mica paper tape provided by the invention has better surface strength and wear resistance, and integrates the functions of filling, reinforcing, heat conduction, heat dissipation and the like.

Description

technical field [0001] The invention relates to the field of insulating mica products, in particular to a highly wear-resistant and anti-aging mica paper tape with better physical properties and a preparation method thereof. Background technique [0002] As a kind of naturally occurring phyllosilicate minerals, mica has excellent physical properties and electrical properties, and maintains the above properties at high temperatures. It is also completely chemically inert, resistant to high voltage, and resistant to corona discharge. And anti-radiation characteristics, has a wide range of applications in the electrical industry. [0003] Mica paper product is one of the most widely used methods of mica at present. It uses mica as the main raw material and is broken into fine mica scales by thermochemical or hydraulic peeling. It has the characteristics of high electric strength, low dielectric loss, high surface resistance and volume resistance. As a secondary processing pro...

AI Technical Summary

Problems solved by technology

[0004] Although the mica paper tape itself is elastic and has excellent physical properties such as great shear resistance and tensile strength, this type of mica paper tape is used in the process of wrapping wire cores or other conductors due to It is directly wrapped on the surface of the relevant conductor, and the surface adhesion of the paper tape is poor, which is prone to displacement, and wears out with the displacement of the core or the conductor itself during use, thus accelerating the aging phenomenon during long-term use , affecting the thermal conductivity, mechanical properties and electrical insulation properties of mica paper tape

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