Preparation method of low-resistance surface filtering material

Abstract

The invention provides a preparation method of a low-resistance surface filtering material, and particularly relates to the field of filtering materials, and the preparation method comprises the following steps: S1, preparing a nano non-woven fiber felt material with gram weight of 10-100 g / m2 from a polymer solution or melt by an electrostatic spinning method; S2, subjecting the high-performancefibers to opening, mixing, carding, lapping operations, combining the nets, and then adding base cloth, performing needling or spunlace, and producing a filter material plain felt with the total gramweight of 200-800 g / m2; and S3, attaching the nano non-woven fiber felt material to the surface of the filter material plain felt in a hot melting compounding manner to obtain the filter material withthe compact surface and the nano fiber layer gradient structure. The product prepared by the invention can realize high-efficiency surface interception of fine dust, improves the interception efficiency of a filter material on ultrafine dust in the working condition operation process, realizes surface filtration and reduces the operation resistance.

Description

technical field [0001] The invention belongs to the field of filter materials, and in particular relates to a preparation method of a low-resistance surface filter material. Background technique [0002] As the country has become more and more strict on environmental protection, people have paid more and more attention to the comprehensive treatment technology of industrial smoke and dust pollution. Due to the advantages of high filtration efficiency and long service life, bag dust removal technology is more and more widely used in the field of industrial smoke and dust control. The filter material is the "heart" of bag dust removal, and its performance determines the stability of the entire system operation and whether it can achieve ultra-low dust emission requirements. Therefore, as the dust emission standards of various industries are getting lower and lower, higher requirements are put forward for the performance of filter materials when comprehensively controlling ult...

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Problems solved by technology

[0003] In the prior art, the dust ultra-low emission control mainly adopts the method of mixing superfine fibers into the filter material fiber layer (conventional fiber diameter is 13-16 μm, ultrafine fiber diameter is 5-8 μm) or sticking a layer of 2 on the surface of the filter material. - PTFE membrane with a thickness of 3 μm, but due to the large diameter of the fibers intertwined to form a large pore size or the film is easily damaged, the interception efficiency of ultrafine dust is not high in actual working conditions;

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