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Filter material and use thereof

A filter material, polytetrafluoroethylene technology, applied in the direction of filtration separation, dispersed particle filtration, dispersed particle separation, etc., can solve the problems of unusable and filter material failure, and achieve the effect of good collection efficiency and good mechanical strength

Inactive Publication Date: 2010-06-23
TORAY FIBER RES INST(CHINA) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that once the film on the surface of the filter material is damaged, the filter material will fail and cannot be used.

Method used

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  • Filter material and use thereof
  • Filter material and use thereof
  • Filter material and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Warp 20S / 2 and weft 20S were obtained using PPS staple fibers with a fineness of 2.2 decitex (average fiber diameter 14.5 μm) and a piece length of 51 mm ("Tecon" manufactured by Toray Co., Ltd.). It was flat-woven to obtain a PPS staple fiber plain weave fabric with a warp density of 30 / 2.54 cm and a weft density of 14 / 2.54 cm. Using this fabric as the base fabric, use 120g / m on one side 2 The unit area weight of the laminated fiber web is made of PPS staple fibers with a denier of 7.8 decitex (average fiber diameter of 27.2 μm) and a length of 51 mm. 2 Obtained by needling, the web forms the fibrous layer of the filter material. Then the fabric (base cloth) and the above-mentioned fiber layer will be interwoven by further needle-punching, and the fibers of the fiber layer will pass through the fabric layer to form fiber needle-punched intertwining through the layer (i.e. the middle fiber layer) to obtain a grammage of 240g / m 2 , the total needling density is 300 pcs...

Embodiment 2

[0047] With the fabric described in embodiment 1 as the base cloth, on one of them with 120g / m 2 The unit area weight of the laminated fiber web is made of PPS staple fibers with a fineness of 2.2 dtex (average fiber diameter of 14.5 μm) and a length of 51 mm. 2 Obtained by needling, the web forms the fibrous layer of the filter material. Then the fabric (base cloth) and the above-mentioned fiber layer will be interwoven by further needle-punching, and the fibers of the fiber layer will pass through the fabric layer to form fiber needle-punched intertwining through the layer (i.e. the middle fiber layer) to obtain a grammage of 240g / m 2 , the total needling density is 300 pcs / cm 2 needle felt. Except for these, the filter material was obtained by the same method as Example 1.

Embodiment 3

[0049] With the fabric described in embodiment 1 as base cloth, on one of them face with 280g / m 2 The weight per unit area of ​​the laminated fiber web is made of PPS staple fibers with a fineness of 7.8 decitex (average fiber diameter of 27.2 μm) and a length of 51 mm ("Tecon" S301-7.8T 51mm manufactured by Toray Co., Ltd.). After cotton and carding treatment, the needle density is 50 / cm 2 Obtained by needling, the web forms the fibrous layer of the filter material. Then the fabric (base cloth) and the above-mentioned fiber layer will be interwoven by further needle punching, and the fibers of the fiber layer will pass through the fabric layer to form fiber needle punching and intertwine through the layer (i.e. the middle fiber layer) to obtain a grammage of 400g / m 2 , the total needling density is 300 pcs / cm 2 needle felt. Except for these, the filter material was obtained by the same method as Example 1.

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Abstract

The invention discloses a filter material and use thereof. The filter material adopts a structure having a first polytetrafluoroethylene membrane layer, a second fabric reinforcing layer and a third fiber layer, wherein a intermediate fiber layer, which is a fiber needling combination through layer formed by part of fibers, passing through the second layer, of the third layer when the second layer and the third layer are combined by needling, is arranged between the first and second layers. The filter material of the invention has the advantages that: the efficiency of the capture of the dust in exhausted gases is high; the keel has excellent mechanical strength properties such as wear resistance or fracture strength, high stiffness and stable size; and the service life is long. Thus, the filter material is particularly suitable to be used as dedusting filter cloth for filtering high-temperature gases exhausted from garbage incinerators, coal-fired boilers, metal smelting furnaces and the like and used in filter bags formed by the filter cloth.

Description

Technical field: [0001] The invention relates to a filter material and its application. Background technique: [0002] With the continuous development of our country's society and economy and the continuous improvement of people's living standards, people's requirements for the quality of the atmospheric environment will become higher and higher. In order to control the emission of air pollutants from coal-fired power plants, protect the living and ecological environment, and implement sustainable development In 2004, my country began to implement the newly revised national pollutant emission standards, which stipulated the emission limits of air pollutants for thermal power plants in three periods, and proposed that thermal power plants should implement sulfur dioxide and soot emissions by 2005 and 2010. Emission limit, in which the smoke emission standard is 50mg / m 3 It has approached or reached the standards of developed countries. In particular, some provinces and cities...

Claims

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Application Information

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IPC IPC(8): B01D39/14B32B5/24B01D46/02
Inventor 沈雪松
Owner TORAY FIBER RES INST(CHINA) CO LTD
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