Filter paper with high filtration efficiency and preparation method thereof

Abstract

The invention discloses a filter paper with high filtration efficiency. The filter paper comprises the following raw materials by weight: 50 to 60 parts of hemp pulp, 45 to 50 parts of wood pulp, 20 to 25 parts of a polystyrene fiber, 3 to 5 parts of sodium carboxymethylcellulose, 3 to 4 parts of nanometer carbon dust, 1 to 2 parts of potash feldspar powder, 1 to 2 parts of alum powder, 1 to 2 parts of 4,4'-methyl diphenylene diisocyanate, 2 to 3 parts of diethylenetriamine, 2 to 3 parts of micro polyamide wax powder, 0.8 to 1 part of bis(dioctyloxypyrophosphato)ethylene titanate, 0.4 to 0.6 part of an anti-oxidant DSTP, 0.5 to 0.6 part of water and zinc borate, 2 to 3 parts of glycol, 6 to 7 parts of rosin, 15 to 20 parts of absolute ethyl alcohol, 3 to 4 parts of nanometer alumina, 0.8 to 1 part of polyoxyethylene octyl phenyl ether, 0.3 to 0.4 part of gamma-(2,3-epoxypropanolato)propyl trimethoxy silane and a proper amount of water. The filter paper produced in the invention has high filtration precision, high filtration efficiency, small air resistance and good assimilative capacity and is environment friendly; an impregnation liquid used in the invention overcomes the disadvantages of great brittleness, poor cohesiveness on the surface of fibers in the filter paper and the like of a filter paper adhesive film, exerts the effect of multistage filtration, compensates for the defect of large bore diameters of a part of bores among the fibers in the filter paper, improves uniformity of the bore diameters of bores among the fibers in the filter paper and enhances screening and filtering effects.

Description

technical field [0001] The invention mainly relates to a filter paper, in particular to a filter paper with high filtration efficiency 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...

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