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A kind of self-cleaning filter cloth and preparation method thereof

A filter cloth and self-cleaning technology, applied in chemical instruments and methods, separation methods, filtration and separation, etc., can solve the problems that the micropores of the fabric are easily blocked by fine particles and dust, high filtration resistance, low efficiency, etc., and achieve good Self-cleaning, ensuring microporosity, and solving the effect of coating peeling off

Active Publication Date: 2021-12-07
ZHEJIANG TIANTAI TIANFENG FILTER MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problem that the micropores of the current press filter cloth and dust removal filter cloth are easily blocked by fine particles and dust, compared with the existing problem of using a coating film to solve the micropore blockage, which has the disadvantages of high filtration resistance and low efficiency, the present invention proposes a A kind of self-cleaning filter cloth, by making the twisted yarn self-cleaning, self-cleaning micropores are formed, so that dust and fine particles are not easy to adhere, and prevent dust from clogging the micropores of the fabric, thereby realizing the filter cloth. Self-cleaning effect

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • A kind of self-cleaning filter cloth and preparation method thereof
  • A kind of self-cleaning filter cloth and preparation method thereof
  • A kind of self-cleaning filter cloth and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Sodium bicarbonate is prepared as a solution that has a mass concentration of 8%, and it is packed into an infiltration tank, then 30 polyamide fiber fibers are twisted by Z through the infiltration tank, and the sodium bicarbonate solution is adsorbed, and excess sodium bicarbonate solution is removed by pressure filtration, spare;

[0033] (2) adding alum to a high-concentration polytetrafluoroethylene aqueous phase dispersion (commercially available model is FR301B) with a solid content of 60wt% to disperse evenly to obtain a coating solution, dipping 30 composite fibers of S twist into the coating solution; alum The addition amount of the polytetrafluoroethylene emulsion is 5% of the quality of the polytetrafluoroethylene emulsion; the composite fiber is a composite twisted fiber yarn of alumina fiber and nylon fiber, and the proportion of alumina fiber is 20%;

[0034] (3) the Z-twisted nylon fiber pretreated in step (1) and the S-twisted composite fiber pretre...

Embodiment 2

[0038] (1) Sodium bicarbonate is prepared as a mass concentration of 8% solution, put into the soaking tank, then 40 polyamide fibers are twisted by Z through the soaking tank, absorb the sodium bicarbonate solution, press filter to remove excess sodium bicarbonate solution, spare;

[0039] (2) Alum is added into the high-concentration polytetrafluoroethylene aqueous phase dispersion liquid (commercially available model is FR301B) that solid content is 60wt% to disperse evenly to obtain coating liquid, 40 composite fibers of S twist are dip-coated coating liquid; Alum The addition amount of the polytetrafluoroethylene emulsion is 3% of the quality of the polytetrafluoroethylene emulsion; the composite fiber is a composite twisted fiber yarn of alumina fiber and nylon fiber, and the proportion of alumina fiber is 20%;

[0040] (3) the Z-twisted nylon fiber pretreated in step (1) and the S-twisted composite fiber pretreated in step (2) are plied according to the Z-twisted mode t...

Embodiment 3

[0044] (1) Sodium bicarbonate is prepared as a mass concentration of 8% solution, put into the soaking tank, then 50 polyamide fibers are twisted by Z through the soaking tank, absorb the sodium bicarbonate solution, press filter to remove excess sodium bicarbonate solution, spare;

[0045] (2) adding alum to the high-concentration polytetrafluoroethylene aqueous phase dispersion liquid (commercially available model is FR301B) that solid content is 60wt% disperses evenly to obtain the coating liquid, dip-coating the coating liquid with 50 composite fibers of S twist; alum The addition amount of the polytetrafluoroethylene emulsion is 5% of the quality of the polytetrafluoroethylene emulsion; the composite fiber is a composite twisted fiber yarn of alumina fiber and nylon fiber, and the proportion of alumina fiber is 15%;

[0046] (3) the Z-twisted nylon fiber pretreated in step (1) and the S-twisted composite fiber pretreated in step (2) are plied according to the Z-twisted mo...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract

The invention belongs to the field of industrial filter cloth, in particular to a self-cleaning filter cloth and a preparation method. The Z-twisted nylon fiber soaked in sodium bicarbonate and the S-twisted composite fiber coated with polytetrafluoroethylene emulsion containing alum are plied according to Z-twisting, and the process of the obtained strands maintains a good fineness due to the generation of gas. Pores, there are micropores in the polytetrafluoroethylene film; according to the plain weave, weave the gray cloth with a warp density of 120 threads / cm and a weft thread of 90 threads / cm according to the plain weave; distribute the obtained gray cloth evenly at 140-160°C The pressure roller with the array of concave points is heat-pressed and shaped to obtain a self-cleaning filter cloth with convex points on the surface. The filter cloth obtained by the invention is not easy to adhere to fine particles and has good self-cleaning property, thereby effectively solving the problem of clogging of the micropores of the filter cloth.

Description

technical field [0001] The invention belongs to the field of industrial filter cloth, in particular to a self-cleaning filter cloth and a preparation method. Background technique [0002] The filter cloth is mainly a filter cloth woven with nylon fiber, polypropylene fiber, etc. Due to its good acid and alkali corrosion resistance and wear resistance, it is widely used in chemical industry, metallurgy and other fields for fluid liquid / solid separation, material purification, industrial filter press, centrifuge filter cloth, copper smelting, recycling, etc. Therefore, the most basic requirements for filter cloth are good air permeability, fast water leakage, easy cleaning, and long-term use. [0003] Generally, the filter porosity of the filter cloth is controlled by the fineness of the warp and weft yarns, and the interweaving density of the warp and weft yarns. Especially with the improvement of filtration requirements, the filtration accuracy of commonly used filter clot...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D39/08D03D15/283D03D15/40D03D15/242D03D15/47D03D15/58D03D13/00D06C23/04D02G3/04D06M11/76D06M15/256D06M11/57D06M101/34
CPCB01D39/08D03D15/00D03D13/008D06C23/04D02G3/04D06M11/76D06M15/256D06M11/57B01D2239/10D10B2101/02D10B2331/02D06M2101/34D06M2200/11D06M2200/12
Inventor 林仁文
Owner ZHEJIANG TIANTAI TIANFENG FILTER MATERIAL CO LTD
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