Polyfluortetraethylene fiber filter material and preparation method thereof

A polytetrafluoroethylene and fiber filter technology, which is applied in the field of high-temperature filter materials and its preparation, can solve the problems of poor working conditions of incinerators, complex components, and inability to meet the requirements of smoke and dust filtration.

Active Publication Date: 2010-10-27
ZHEJIANG HONGSHENG NEW MATERIAL TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, with the acceleration of urbanization and the increase of domestic garbage, medical waste and other waste items, some waste incineration projects are also increasing, although the amount of smoke and dust emissions is smaller than that of thermal power industry, steel industry, cement industry and other industries There are many, but the smoke and dust emitted by garbage incinerators contain dioxins, which will cause great harm if not strictly controlled
Moreover, because my country's garbage disposal is not classified and its components are complex, the working conditions of garbage incinerators are harsh, and the flue gas is highly corrosive, containing sulfides, nitrogen oxides, hydrogen chloride, bromide, etc., and has a large moisture content, which is harmful to filtration. Bag performance puts high demands on
[0003] At present, for the filtration of waste incineration smoke and dust, filter materials made of glass fiber, polyphenylene sulfide fiber (PPS), polyimide fiber (P84) and other fibers are mainly used, and the filter material is corroded and the filter accuracy is different to varying degrees. Low, short service life and other problems, can no longer meet the requirements of smoke and dust filtration

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Using polytetrafluoroethylene short fibers, the performance indicators are: length 51mm; fineness 3D; crimp 12 pieces / 25mm; tensile strength 2.7cn / dtex; heat shrinkage rate <1.5%. Spread the loose bales of raw materials evenly, spray the aqueous solution containing 2% electrostatic agent and let it stand for 24 hours before putting into production, opening, semi-worsted carding, drawing, woolen, fine spinning, twisting, warping, hedging, Weaving, impregnating treatment, coating treatment, inspection into packages.

[0016] The parallel twisting process is combined into 156tex yarn, and with a shuttleless loom, the polytetrafluoroethylene fiber filter cloth of 650g / m2 is woven into a 3 / 5 weft double weaving process. The filter cloth is impregnated, and the impregnation solution is a polytetrafluoroethylene solution, and the proportion is:

[0017] PTFE

40％

polyphenylene

20％

Adhesive

1％

water

margin

[0018] The su...

Embodiment 2

[0021] Using polytetrafluoroethylene short fibers, the performance indicators are: length 51mm; fineness 3D; crimp 12 pieces / 25mm; tensile strength 2.7cn / dtex; heat shrinkage rate <1.5%. Spread the loose bales of raw materials evenly, spray the aqueous solution containing 2.5% electrostatic agent and let it stand for 24 hours before putting into production, opening, semi-worsted carding, drawing, woolen, fine spinning, twisting, warping, hedging, Weaving, dipping treatment, coating treatment, inspection into packages.

[0022] The yarn formed by the parallel twisting process is woven into 420g / m2 polytetrafluoroethylene fiber filter cloth with a rapier loom using a 1 / 3 twill weaving process. The filter cloth is impregnated, and the impregnation solution is a polytetrafluoroethylene solution, and the proportion is:

[0023] PTFE

30％

polyphenylene

30％

Adhesive

1.5％

water

margin

[0024] The surface of the treated cloth is...

Embodiment 3

[0027] Use 400D polytetrafluoroethylene filaments through warping, hedging, and weaving (with an air-jet loom), and use a 3 / 5 weft double weaving process to weave into a 750g / m2 filter cloth (the weft yarn also uses 400D PTFE filament). Then the filter cloth is impregnated, and the impregnation solution is a polytetrafluoroethylene solution, and its composition is as follows:

[0028] PTFE

35％

polyphenylene

25％

Adhesive

2％

water

margin

[0029] The surface of the treated cloth is covered with a layer of polytetrafluoroethylene film, and then inspected into bags.

[0030] Its tensile strength is ≥4500N / 5cm.

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Abstract

The invention provides a polyfluortetraethylene fiber filter material and a preparation method thereof, and the polyfluortetraethylene fiber filter material has excellent advantages of excellent high-temperature chemical stability, high filtration precision, abrasion resistance, long service life, a wide range of applications and the like, and is particularly applicable to filtration needs under harsh working conditions and environment. The polyfluortetraethylene fiber filter material is prepared by carrying out dipping treatment on polyfluortetraethylene fiber filter cloth and further carrying out film coating or coating treatment, wherein the dipping treatment adopts polyfluortetraethylene solution for dipping; and the polyfluortetraethylene solution comprises 30wt%-40wt% of polyfluortetraethylene, 20wt%-30wt% of ekonol, 1wt%-3wt% of binding agent and the balance of water.

Description

technical field [0001] The invention relates to a high-temperature filter material and a preparation method thereof, in particular to a polytetrafluoroethylene fiber filter material and a preparation method thereof. Background technique [0002] At present, with the acceleration of urbanization and the increase of domestic garbage, medical waste and other waste items, some waste incineration projects are also increasing, although the amount of smoke and dust emissions is smaller than that of thermal power industry, steel industry, cement industry and other industries There are many, but the smoke and dust emitted by garbage incinerators contain dioxins, which will cause great harm if not strictly controlled. Moreover, because my country's garbage disposal is not classified and its components are complex, the working conditions of garbage incinerators are harsh, and the flue gas is highly corrosive, containing sulfides, nitrogen oxides, hydrogen chloride, bromide, etc., and h...

Claims

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Application Information

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IPC IPC(8): B01D39/08
Inventor 宋朋泽
Owner ZHEJIANG HONGSHENG NEW MATERIAL TECH GRP CO LTD
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