Composite filter material and preparation method thereof

A composite filter material and chemical fiber technology, applied in separation methods, chemical instruments and methods, filtration separation, etc., can solve the problem of increased demand for high-performance environmental protection filter materials, poor filtration performance or tolerance, and can not meet the actual use Requirements and other issues, to achieve excellent filtration performance, wide range of working conditions, and long service life

Pending Publication Date: 2019-03-22
ZHEJIANG HONGSHENG NEW MATERIAL TECH GRP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the flue gas produced by some flue gas emission points or dust raising points in the above-mentioned industries has high temperature and contains acidic and alkaline substances, which put forward higher requirements for the filtration accuracy, temperature resistance and corrosion resistance of filter materials.
[0003] At present, the filter materials used in the field of high-temperature filtration mainly include: glass fiber, polyphenylene sulfide (PPS), polyimide, aramid fiber, polytetrafluoroethylene, etc., all of which have certain defects, and the filtration performance or tolerance The performance of the filter material is poor, and the overall performance of the prepared filter material is average. With the increasingly stringent requirements for industrial smoke and dust emissions, the above-mentioned materials cannot meet the actual use requirements gradually, and the demand for high-performance environmental protection filter materials is increasing.

Method used

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  • Composite filter material and preparation method thereof
  • Composite filter material and preparation method thereof
  • Composite filter material and preparation method thereof

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preparation example Construction

[0062] The present invention also provides a method for preparing the composite filter material described in the above technical solution, comprising the following steps:

[0063] a) Consolidating the chemical fiber net layer and the expanded glass fiber cloth layer by needle punching and / or hydroentanglement to obtain a composite;

[0064] b) impregnating, drying and heat-setting the composite to obtain a composite filter material.

[0065] Wherein, the characteristics such as the type, gram weight, aperture, and thickness of the chemical fiber net layer and the glass fiber expanded cloth layer are consistent with those described in the above technical solution, and will not be repeated here. The sources of the chemical fiber net layer and the expanded glass fiber cloth layer are consistent with those described in the above technical solution, and will not be repeated here.

[0066] In the present invention, there is no special limitation on the way of needle punching or spu...

Embodiment 1

[0072] S1: Superfine glass fiber drawing and forming→drawing and soaking treatment→spinning processing→bulking processing→1 / 3 twill weaving process, made into 350g / m 2 Ultra-fine glass fiber expanded cloth, warp and weft strength ≥ 1650N.

[0073] S2: unpacking of fine denier aramid fiber raw materials → spreading evenly → spraying 3% antistatic agent aqueous solution → standing for 12 hours → pre-opening → main opening → cotton box mixing → carding into a net, made into 240-260g / m 2 Aramid fiber mesh.

[0074] S3: The superfine glass fiber expanded cloth and the aramid fiber net are subjected to pre-needling-spunlace-shaving to obtain a composite.

[0075] S4: After impregnating the obtained composite, dry it at 100°C for 5 minutes, and then heat-set it at 230°C for 10 minutes to obtain a grammage of 600g / m 2 Composite filter material;

[0076] The impregnating liquid formula that above-mentioned dipping treatment adopts is as follows:

[0077] Polytetrafluoroethylene e...

Embodiment 2

[0079] S1: Superfine glass fiber drawing and molding→drawing and soaking treatment→spinning processing→bulking processing→1 / 3 twill weaving process, made into 420g / m 2 Superfine glass fiber expanded cloth, warp and weft strength ≥1850N.

[0080] S2: unpacking of fine denier P84 fiber raw materials → spreading evenly → spraying 3% antistatic agent aqueous solution → standing for 12 hours → pre-opening → main opening → cotton box mixing → carding to form a web of 300-350g / m 2 P84 fiber mesh.

[0081] S3: The superfine glass fiber expanded cloth and the aramid fiber net are subjected to pre-needling-spunlace-shaving to obtain a composite.

[0082] S4: After impregnating the obtained composite, dry it at 120°C for 4 minutes, and then heat set it at 240°C for 8 minutes to obtain a grammage of 750g / m 2Composite filter material;

[0083] The impregnating liquid formula that above-mentioned dipping treatment adopts is as follows:

[0084] Polytetrafluoroethylene emulsion (solid co...

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Abstract

The invention provides a composite filter material and a preparation method thereof. The composite filter material provided by the invention comprises a first PTFE impregnating layer, a chemical fibernet layer, a glass fiber expanded fabric layer and a second PTFE impregnating layer which are sequentially contacted, wherein the chemical fiber net layer is combined with the glass fiber expanded fabric layer to realize a synergistic effect as well as excellent filtering performance, temperature resistance and strength performance; meanwhile, the PTFE impregnating layers are compounded on two sides of a combination body so as to facilitate the collection of fine dust and further improve the dust removal efficiency. Therefore, the integral composite material has excellent filtering performance, temperature and corrosion resistance, broad use conditions and long service life.

Description

technical field [0001] The invention relates to the technical field of environmental protection materials, in particular to a composite filter material and a preparation method thereof. Background technique [0002] In recent years, with the country's increasing emphasis on environmental protection, the environmental protection industry has shown a trend of rapid development. Carbon black, steel, non-ferrous metals, chemicals, cement, waste combustion, coal-fired power generation and other industries will produce dust and smoke, which pollute the environment, and usually need to be treated with high-temperature filter materials. However, some of the flue gas emission points or dust emission points in the above-mentioned industries produce high temperature flue gas, containing acidic and alkaline substances, which put forward higher requirements on the filtration accuracy, temperature resistance and corrosion resistance of filter materials. [0003] At present, the filter ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B17/02B32B17/12B32B27/02B32B27/34B32B27/28B32B27/32B32B27/12B32B27/06D06M15/256D06M15/333D06M15/564D06M13/50B01D39/16B29C70/30
CPCB01D39/16D06M13/50D06M15/256D06M15/333D06M15/564B29C70/30B32B5/028B32B5/26B32B2262/0253B32B2262/0269B32B2260/046B32B2262/02B32B2250/20B32B2260/021B32B2262/101B32B2262/14
Inventor 宋明泽李刚
Owner ZHEJIANG HONGSHENG NEW MATERIAL TECH GRP CO LTD
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