A kind of wet method of manufacturing membrane filter cloth

Abstract

The invention discloses a method for manufacturing laminating filter cloth through wet process. A laminated membrane layer of the laminating filter cloth is obtained through a method of coagulating a coating through the wet process. The technical scheme is that first calendaring processing is performed on a lamination face of the filter cloth needing laminating processing, then a coating agent which is high in porosity, smooth in surface and good in elasticity and abrasion resistance and is made of an organic high polymer material is coated or soaked on the surface of the filter cloth subjected to calendaring processing through the coating or a soaking device, the filter cloth coated with the coating agent is soaked into coagulating bath and stays in the coagulating bath at certain temperature for a while to ensure that a membrane is well formed on the surface of the filter cloth through the coating agent, and the temperature of the coagulating bath and the staying time are controlled and adjusted to obtained the required porosity and membrane layer thickness. Then washing and drying are performed, and the technological process for manufacturing the laminating filter cloth through the wet process is finished. According to obtained laminating filter cloth, deep filtering is changed into surface filtering, so that filtered materials cannot be clustered in holes among yarns of the filter cloth and are smoothly separated from the filter cloth along with the cake removing process of a filter cake, the materials are prevented from being blocked in the holes among the yarns and fibers of the filter cloth and holes in the fibers of the filter cloth, and the possibilities that the filtered materials block the filter cloth are greatly reduced. The method is an important approach and effective way for improving filtering efficiency, reducing energy consumption of a filtering system, reducing blockage of the filter cloth, greatly increasing service life of the filter cloth, and greatly reducing production cost. The method can be applied to solid-liquid separation, filtering, dehydration, material purification and recovery operation in industries of mines, metallurgy, chemical engineering, light industries, foods and the like.

Description

technical field [0001] The invention relates to a method for wet manufacturing film-coated filter cloth. In particular, the present invention relates to a method for manufacturing a filter medium used in the mineral resources industry to improve resource recovery and utilization, a filter medium for liquid / solid separation of industrial fluids, and a filter medium for material purification or recovery. Background technique [0002] At present, industrial textile fiber filter media are widely used in the filtration process of mineral product dehydration, coal washing, industrial fluid liquid / solid separation, material purification or recovery in the mineral resource industry. And the filter medium used on the industrial filter is mostly woven filter cloth or non-woven filter cloth made of chemical fiber or natural fiber. [0003] The filtering function of this kind of woven filter cloth or non-woven filter cloth is accomplished by the interweaving of warp and weft yarns or t...

AI Technical Summary

Problems solved by technology

The problem of direct coating is that when the coating is thick, drying and forming a film will easily cause more protrusions on the surface of the film, which will affect the product quality, uneven distribution of pores on the film material, and difficulty in adjusting and controlling the porosity.

So far, no good solution has been proposed in the field of manufacturing textile fiber woven filter cloth or non-woven filter cloth

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