Filter paper and preparation method thereof

Abstract

The invention relates to filter paper and a preparation method thereof. The filter paper disclosed by the invention is composed of the following raw materials by weight: 90-100 parts of bamboo pulp, 12-15 parts of cellulose acetate, 10-12 parts of mineral wool fibers, 3-4 parts of stearic acid, 2-3 parts of nano silica, 2-3 parts of dolomite powder, 5-6 parts of microwax powder, 1-2 parts of sodium dibutylnaphthalene sulfonate, 1-3 parts of glycerol triacetate, 2-3 parts of oxidized polyethylene wax, 0.8-1 part of dimethyl isooctyl thioglycolate tin, 0.6-1 part of aminopropyl triethoxysilane, 0.1-0.2 part of alumina powder, PAE3-5 parts of a wet strength agent, 6-10 parts of rosin, 15-20 parts of absolute ethyl alcohol, 1-2 parts of lauryl alcohol polyoxyethylene and a proper amount of water. The filter paper produced by the method has high filtration precision, high filtration efficiency, low air resistance, strong assimilative capacity and environmental protection. An impregnation liquid not only overcomes disadvantages of large fragility of filter paper coating, poor cohesive property to fiber surfaces in the filter paper and the like but also plays a multi-filtration effect, thereby making up the defects that partial holes among the filter fibers are relatively large in size, increasing uniformity of the hole size among the filter fibers and enhancing a filtering effect.

Description

technical field [0001] The invention mainly relates to a filter paper, in particular to a filter paper for a filter and a preparation method thereof. Background technique [0002] The engine has three types of filters: air, oil, and fuel, generally referred to as "three filters". They are respectively responsible for the filtration of the medium in the engine intake system, lubrication system and combustion system. Due to the large pore size, poor uniformity, and low filtration efficiency of traditionally produced filter paper, it cannot effectively filter out impurities harmful to the engine, causing early engine wear and tear. The impregnated emulsion for filter paper has now changed from alcohol-soluble to Water-soluble development, commonly used water-soluble impregnated emulsions such as polyvinyl acetate copolymer emulsion, styrene-acrylic emulsion and pure acrylic emulsion, among which styrene-acrylic emulsion is the most commonly used, but the filter paper film ...

AI Technical Summary

Problems solved by technology

Due to the large pore size, poor uniformity, and low filtration efficiency of traditionally produced filter paper, it cannot effectively filter out impurities harmful to the engine, causing early engine wear and tear. The impregnated emulsion for filter paper has now changed from alcohol-soluble to Water-soluble development, commonly used water-soluble impregnated emulsions such as polyvinyl acetate copolymer emulsion, styrene-acrylic emulsion and pure acrylic emulsion, among which styrene-acrylic emulsion is the most commonly used, but the filter paper film after impregnated with styrene-acrylic emulsion is relatively brittle , the adhesion to the surface of the fiber in the filter paper is not good, and the amount of functional monomer is large, the cost is high, especially the stiffness is not high and it cannot be degraded in the environment