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High-precision filter felt and preparation method thereof

A filter felt, high-precision technology, applied in the field of filtration, can solve the problems of poor wear resistance, high preparation cost, and high application cost, and achieve the effects of improving wear resistance, improving mechanical strength, and reducing filtration resistance.

Active Publication Date: 2020-03-31
厦门保瑞达环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although microporous membranes can achieve high-precision filtration effects, they have the following defects: (1) high preparation costs; (2) need to achieve filtration under pressure, high application costs; (3) poor wear resistance, use short life

Method used

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  • High-precision filter felt and preparation method thereof
  • High-precision filter felt and preparation method thereof
  • High-precision filter felt and preparation method thereof

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preparation example Construction

[0025] A method for preparing a high-precision filter felt provided by an embodiment of the present invention is characterized in that it comprises the following steps:

[0026] S1, after the low-melting point polyester fiber is opened, it is fed into a carding machine to obtain a polyester fiber fleece.

[0027] In this embodiment, the low-melting point polyester fiber can be selected from commercially available low-melting point PET polyester fiber, and the melting point of the low-melting point polyester fiber is preferably 110-180°C. Through opening treatment, the fibers are in a fluffy state.

[0028] In this step, the input line speed of the carding machine is 1.6-2.6m / min, and the amount of fed fiber is 4-6kg / m 2 , the frequency is 300~600rpm / min.

[0029] S2. Opening the basalt fiber and the polypropylene fiber respectively, and then mixing to obtain a mixed fiber, and feeding the mixed fiber into a carding machine to obtain a mixed fiber fleece.

[0030] In this st...

Embodiment 1

[0053] A high-precision filter felt provided in this embodiment is prepared according to the following steps:

[0054] (1) After the low-melting point polyester fiber of 0.98dtex is opened and processed, it is fed into a carding machine to obtain a polyester fiber fleece. The input line speed of the carding machine is 2.2m / min, and the amount of fed fiber is 5kg / m 2 , the frequency is 400rpm / min.

[0055] (2) After the 4dtex basalt fiber and the 4dtex polypropylene fiber are respectively opened, they are mixed according to a weight ratio of 1:2 to obtain a mixed fiber, and the mixed fiber is fed into a carding machine to obtain a mixed fiber fleece. The parameters of the mixed fiber in the carding machine are: the input line speed is 1.0m / min, and the amount of fed fiber is 7kg / m 2 , the frequency is 400rpm / min.

[0056] (3) the mixed fiber fleece that step (2) obtains is after soaking 25min in the aqueous solution of polydimethyldiallyl ammonium chloride and sodium chlorid...

Embodiment 2

[0063] A high-precision filter felt provided in this embodiment is prepared according to the following steps:

[0064] (1) obtain needle-punched filter felt according to the steps (1)-(7) of embodiment 1;

[0065] (2) Immerse the needle-punched filter felt in isopropanol for 40 minutes, and then coat the surface of the needle-punched filter felt with β-cyclodextrin and citric acid at a mass ratio of 1:1.2-1.5:0.1-0.3 And the hydrophilic solution of sodium hypophosphite, after coating, place it at 105°C for 1.5h. Wherein, the hydrophilic solution containing β-cyclodextrin contains β-cyclodextrin, citric acid and sodium hypophosphite in a mass ratio of 1:1.4:0.2.

[0066] (3) hot-rolling the needle-punched filter felt obtained in step (2), so that the polyester fibers on the surface are plasticized to form a microporous fiber membrane layer. The hot rolling temperature is 220° C., and the hot rolling pressure is 0.5 MPa.

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Abstract

The invention provides a high-precision filter felt and a preparation method thereof. The method includes: preparing mixed fibers from raw materials of basalt fibers and polypropylene fibers, attaching rice husk silicon to the mixed fibers, depositing TiO2 to form a mixed fiber fleece having a rough surface, successively laminating a polyester fiber fleece, the mixed fiber fleece and polypropylenefiber fleece to obtain a felt mesh; performing puncturing reinforcement on the felt mesh and performing hot-rolling to plasticize the polyester fibers on the surface layer, thereby forming a microporous fiber film layer. By mixing the basalt fibers with the polypropylene fibers, mechanical strength, corrosion resistance and wearing resistance and the like of the material are greatly improved. Therough surface formed by means of the rice husk silicon and deposited TiO2, the combination is strong, so that the wearing resistance of the product is greatly improved, and adsorption filtering effect of the product to a medium is enhanced, thereby effectively reducing filtering resistance.

Description

technical field [0001] The invention relates to the technical field of filtration, and in particular to a high-precision filter felt and a preparation method thereof. Background technique [0002] The filter felt is widely used in the field of industrial liquid-solid separation, such as sewage purification, ore washing screening and filtration, solid-liquid separation of industrial wastewater, etc. The solid in the suspension to be separated is filtered and separated by utilizing the microporous structure of the filter felt. The size of the largest particle that the filter felt allows to pass is the filtration accuracy. [0003] The existing needle-punched non-woven filter materials can achieve a filtration accuracy of 10 microns, 5 microns, 3 microns, etc. If the filtration accuracy is to be below 1 micron, a microporous membrane is required. Although microporous membranes can achieve high-precision filtration effects, they have the following defects: (1) high preparatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D39/14B32B27/02B32B27/12B32B27/36B32B27/32B32B9/00B32B9/04B32B3/24B32B33/00
CPCB01D39/14B32B5/02B32B27/12B32B9/047B32B3/266B32B2262/0276B32B2262/0253B32B2262/10B32B2250/20B32B2255/02B32B2255/20B32B2307/554B01D2239/0216
Inventor 高芳芳黄清保
Owner 厦门保瑞达环保科技有限公司
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