Preparation method of mica paper pulp

Abstract

The invention discloses a preparation method of mica paper pulp. Leftover materials, waste materials or damaged materials obtained on a mica paper production line are used as raw materials. The preparation method comprises the following steps: removing impurities, cutting into pieces, soaking in alkali liquor, putting into a beater, pulping, carrying out enzymolysis treatment, cleaning the enzymolysis product, carrying out vacuum heat preservation treatment with cationic starch, washing with running water, drying, and carrying out microwave ball milling to obtain processed mica powder; and mixing the processed mica powder with mica cooked powder with the same particle size range value according to the ratio of 1: 2-1: 3, and adding an auxiliary agent and / or a reinforcing material to prepare the mica paper pulp material capable of being directly used for the mica paper machine. The process can effectively improve the utilization rate of mica paper waste and reduce the raw material costand has considerable economic and social benefits.

Description

technical field [0001] The invention relates to the technical field of mica paper preparation, in particular to a method for preparing mica paper pulp that can effectively reduce the production cost of mica paper. Background technique [0002] As one of the most widely used methods of mica, mica paper products are made from crushed mica flakes (muscovite, phlogopite, and synthetic mica) through chemical pulping or hydraulic mechanical crushing, pulping, and papermaking. Mica paper It often has most of the properties of the corresponding category of sheet mica products. It is widely used in the industry as insulating materials in cables and large-scale electromechanical equipment. It has high electrical strength, low dielectric loss, high surface resistance and volume resistance. Electrical properties, At the same time, it also has excellent physical and chemical properties such as high insulation, anti-corona, acid and alkali resistance, radiation resistance, chemical stabil...

AI Technical Summary

Problems solved by technology

Although this method can recycle mica paper waste, in the process of recycling, the recovered mica paper waste will be processed once, and the van der Waals force and electrostatic force between the mica sheets will be weakened, which will lead to The mechanical strength of the mica paper after pulping becomes smaller, the mechanical properties and reliability become worse, and it is easy to dissociate and deform during use, which is difficult to meet the actual use needs. Glass fiber, polyester, and aramid fiber are also used for supplementation. Strong, but this reinforcement method will directly affect the dielectric strength of mica paper, and also have a certain impact on product quality