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Compound type stair filter material and forming method and application thereof

A filter material and molding method technology, applied in the field of separation, can solve the problems of low filtration efficiency and filtration precision, increased filtration pressure, and easy clogging of the surface layer, so as to reduce product cost, reduce the number of filters, and solve the problem of increased resistance Effect

Inactive Publication Date: 2017-03-22
DSP TECH DEV WENZHOU CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned traditional multi-layer filter fabric not only has complex manufacturing process and high production cost, but also the surface layer is easily blocked in the practical process, resulting in increased filtration pressure, so the filtration efficiency and filtration accuracy are also low, and the service life is short

Method used

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  • Compound type stair filter material and forming method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The utility model relates to a composite stepped filter material, which includes a surface layer filter material and an inner layer filter material, and is made into a two-stage stepped filter material.

[0025] The surface filter material is glass fiber filter material, the quantitative is 70g / m 2 , the filtration accuracy is 35μm, and the air permeability is 5000L / m 2 / S, the air resistance is 100Pa when the wind speed is 5.33cm / s, and the filtration efficiency is 90% when the test particle is 0.3μm and the wind speed is 5.33cm / s. Among them, the glass fiber is formed by wet method.

[0026] The inner filter material is glass fiber filter material, the quantitative is 90g / m 2 , the filtration accuracy is 1.5μm, and the air permeability is 70L / m 2 / S, the air resistance is 540Pa at a wind speed of 5.33cm / s, and the filtration efficiency is 99.99995% at a test particle size of 0.3μm and a wind speed of 5.33cm / s. Among them, the glass fiber is formed by wet method. ...

Embodiment 2

[0029] The utility model relates to a composite stepped filter material, which includes a surface layer filter material and an inner layer filter material, and is made into a two-stage stepped filter material.

[0030] The surface filter material is glass fiber filter material, the quantitative is 70g / m 2 , the filtration accuracy is 60μm, and the air permeability is 5100L / m 2 / S, the air resistance is 110Pa when the wind speed is 5.33cm / s, and the filtration efficiency is 92% when the test particle is 0.3μm and the wind speed is 5.33cm / s. Among them, the glass fiber is formed by wet method.

[0031] The inner filter material is polyethylene melt-blown fiber filter material, the weight is 25g / m 2 , the filtration accuracy is 5μm, and the air permeability is 80L / m 2 / S, the air resistance is 30Pa when the wind speed is 5.33cm / s, and the filtration efficiency is 99.9997% when the test particle is 0.3μm and the wind speed is 5.33cm / s.

[0032] Use a hot-melt glue machine to s...

Embodiment 3

[0034] The utility model relates to a composite stepped filter material, which includes a surface layer filter material and an inner layer filter material, and is made into a two-stage stepped filter material.

[0035] The surface filter material is glass fiber filter material, the quantitative is 20g / m 2 , the filtration accuracy is 40μm, and the air permeability is 5500L / m 2 / S, the air resistance is 5Pa when the wind speed is 5.33cm / s, and the filtration efficiency is 70% when the test particles are 0.3μm and the wind speed is 5.33cm / s. Among them, the glass fiber is formed by wet method.

[0036] The inner filter material is poly-p-phenylene terephthalamide electrostatic cotton filter material, the quantitative is 110g / m 2 , the filtration accuracy is 3μm, and the air permeability is 90L / m 2 / S, the air resistance is 290Pa at a wind speed of 5.33cm / s, and the filtration efficiency is 99.99% at a test particle size of 0.3μm and a wind speed of 5.33cm / s.

[0037] Use a h...

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Abstract

The invention discloses a compound type stair filter material and a forming method and application thereof. A surface-layer filter material and an inner-layer filter material, or a surface-layer filter material, at least one middle-layer filter material and an inner-layer filter material are compositely formed by adopting at least two filter materials with different filtering precision in a filtering precision gradient decreasing mode; the filtering precision is 3.5 mu m to 65 mu m; the filter material comprises one or more of a glass fiber filter material, a plant fiber filter material, a meltblown fiber filter material, and an electrostatic cotton filter material; the total air flow resistance of a compound type stair filter material is less than or equal to 750Pa, the filtering efficiency is 99.99992% to 99.99999%; a hot melt adhesive is sprayed between the filter material layers by utilizing a hot melt adhesive machine, and adhesive filaments are formed, and then press-fitting to form the compound type stair filter material. The compound type stair filter material prepared by the invention has the advantages of obviously improving the filtering effect, simplifying filtering equipment and prolonging the service life of the filtering equipment.

Description

technical field [0001] The invention relates to the field of separation, in particular to a composite stepped filter material and its forming method and application. Background technique [0002] As people's demand for a clean environment is increasing, filtration equipment with high filtration efficiency and low air resistance has broad market prospects. In order to achieve a high degree of purification of air or water, currently on the market, complex equipment and huge multi-stage purification filtration equipment above the second level are often used, and the cost is high. In order to prolong the service life of high-efficiency filtration equipment, the filtration system is usually formed in the form of multiple filters such as primary efficiency, primary and medium efficiency, and high-efficiency filters. The filtration equipment made in this way is large in size, high in cost, and expensive The price is high. [0003] In order to overcome the defects of multi-stage f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D39/14
CPCB01D39/14B01D2239/02B01D2239/10
Inventor 陈海燕何秀娟
Owner DSP TECH DEV WENZHOU CO LTD
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