Three-layer composite filter cloth and manufacturing method thereof

Abstract

The invention discloses three-layer composite filter cloth which comprises a first filter cloth layer, a filter membrane layer and a second filter cloth layer which are sequentially arranged from top to bottom, wherein the filter membrane layer is a PTFE filter membrane or a PU filter membrane; the first filter cloth layer and the second filter cloth layer are formed by performing warp and weft weaving on chemical fibers by virtue of a loom; the warp and weft density is not less than 5 yarns per centimeter; and the warp yarns and weft yarns are made of polypropylene fibers, polyester, acrylic, PTFE, PPS, PVDF, P84 or aramid fibers. The filter cloth layers are arranged on two sides of the filter membrane layer, so that the problem that the wear resistance is poor when the filter membrane is contacted with particles is solved. Meanwhile, compared with the filter cloth in the prior art, the particles with the size of 0.1 micron to 10 microns can be filtered and purified under the condition that the density of the filter cloth material is not changed.

Description

Technical field [0001] The invention relates to the technical field of filter cloth for separating and filtering materials, in particular to a three-layer composite filter cloth and a manufacturing method thereof. Background technique [0002] The filter cloth is used to let the suspension contact the filter cloth. Under the action of pressure, the solid particles smaller than the pore size of the filter cloth pass through the filter cloth, and the particles larger than or equal to the pore diameter of the filter cloth are trapped on the surface of the filter cloth. . [0003] At present, if it is necessary to adapt to the filtration of particles of different sizes, people's practice is to consider increasing the weaving density to change the size of the filter cloth holes. However, the pore size of the filter cloth in the prior art is difficult to achieve a size smaller than 10 microns. Therefore, when the filter cloth in the prior art collects materials, the filtering efficienc...

AI Technical Summary

Problems solved by technology

However, the pore size of the filter cloth in the prior art is difficult to achieve a size smaller than 10 microns

Therefore, when the filter cloth in the prior art collects materials, the filtration efficiency of the filter cloth for materials below 10 microns is not good enough, causing many more valuable particulate materials less than 10 microns to be lost in liquid gas or liquid with gas or liquid

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