Method for regenerating mica paper through reinforcement of aramid precipitated fiber

Abstract

The invention discloses a method for regenerating mica paper through reinforcement of aramid precipitated fiber. The method comprises the following steps: pulverizing mica flakes through high-pressure waterpower, selecting a conical hydrocyclone for hydraulic classification of the mica flakes, introducing the mica flakes to a second-stage conical hydrocyclone for classification and selection to make the mica flakes form a sizing agent suitable for papermaking; according to the requirement of the mica paper, selecting a proper classifying screen for further classification, selecting mica slurry with proper size and distribution, adding 2 to 20 percent aramid precipitated fiber into the mica slurry, uniformly mixing, performing certain beating treatment on the aramid precipitated fiber, and controlling the beating degree between 30 and 50 degree SR; introducing the aramid precipitated fiber to a front-net approach flow system of a paper machine, adding 0.005 to 0.1 percent of polyethylene oxide before a head box or a flow box of the approach flow system; and finally, performing papermaking on an uphill wire or cylinder mould paper machine, drying, and producing qualified paper. The method reduces the paper breaking in papermaking and improves the speed of the paper machine and the production efficiency.

Description

technical field [0001] It belongs to the intersection field of papermaking industry and insulation industry. Background technique [0002] Recycled mica paper is a high-quality insulating material, which is non-toxic, odorless, high temperature, high pressure, aging and corrosion resistant. The product is made of high-quality muscovite, phlogopite and synthetic mica as raw materials, mechanically pulped, paper-made, and then slitting and rewinding into continuous roll paper. my country's mica mines are very rich, and there are minerals in Xinjiang, Inner Mongolia, Sichuan, Henan, Hebei, Jilin, Liaoning and other provinces, but the utilization rate of mica from raw ore to processing into various flake mica products is only about 3% to 10%. , A large amount of mica fragment slag has accumulated over the years. It is a very important subject to make use of pulping and papermaking technology to produce various types of mica paper with mica fragments as raw materials, so that mo...

AI Technical Summary

Problems solved by technology

[0004] However, because the recycled mica paper is made of mica fragments by papermaking, there are only very weak forces such as van der Waals force and charge attraction between the mica fragments, and it does not have the strength of natural mica sheet materials. Although it is compounded with glass during use , polyester and other substrates, but there are also papermaking and compounding processes. Due to the low strength of the mica paper, the paper is easy to break, and the speed is difficult to increase, resulting in extremely low production efficiency.

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