Filter material with composite ultrafine chopped fibers on surface

Abstract

The invention provides a filter material with composite ultrafine chopped fibers on a surface. The filter material comprises a surface layer, a substrate and a bottom layer, wherein the bottom layer is needled by glass fibers, polyphenylene sulfide fibers and polytetrafluoroethylene fibers; and the surface layer is needled by polyphenylene sulfide fibers and polytetrafluoroethylene fibers. The filter material is characterized in that a composite layer formed by glass ultrafine chopped fibers, polyphenylene sulfide ultrafine chopped fibers and polytetrafluoroethylene ultrafine chopped fibers; in the composite layer, the fineness of the glass ultrafine chopped fibers is between 0.3 and 1.0dtex, the fineness of the polyphenylene sulfide ultrafine chopped fibers is between 0.4 and 1.5dtex, and the fineness of the polytetrafluoroethylene ultrafine chopped fibers is between 0.6 and 1.2dtex; and the mass ratio of the glass ultrafine chopped fibers to the polyphenylene sulfide ultrafine chopped fibers to the polytetrafluoroethylene ultrafine chopped fibers in the composite layer is (1:1:1.5)-(1:1:0.5). The filter material has the advantages that smoke and dust which have different properties are filtered, the filter resistance can be reduced, the energy consumption is reduced, and the service life of the filter material is prolonged and the like. The filter material is suitable for rapping, back flushing and other filter bags.

Description

Technical field: [0001] The invention relates to a bag-type dust-removing filter material, in particular to a filter material with composite superfine short fibers for the surface. Background technique: [0002] Bag-type dust removal filter material is from the early fleece filter material, woven cloth filter material into needle felt filter material, and then developed to film-coated filter material, film-coated filter material is made of woven filter material or needle-punched felt filter material As the base, a layer of polytetrafluoroethylene microporous film is covered on its surface. After the filter material is covered with a film, it is mainly formed by surface filtration. The existence of the PTFE microporous film can indeed block the passage of fine particles in the dust, thus greatly improving the filtration efficiency. The PTFE microporous film is used in the needle felt. The surface can act as the first layer of dust, and has certain hydrophobic and oil-repelle...

AI Technical Summary

Problems solved by technology

However, there are certain problems after film coating, mainly because the initial resistance of dust removal and filtration is large, the wind speed of dust removal and filtration cannot be too high, and there are also problems such as difficulty in pre-coating dust, so the cost of use is increased. Damage, or cause the film to fall off, causing the filter material to be unusable and affecting the use effect

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