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Polytef double-film composite filtering materials

A technology of polytetrafluoroethylene membrane and polytetrafluoroethylene, which is applied in the field of polytetrafluoroethylene double-membrane composite filter materials, can solve the problems of large investment, short service life, and high price, and achieve good economic and social benefits , long service life and low price

Inactive Publication Date: 2007-01-17
江苏正大森源集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under the working conditions of high temperature, high water content and high pH, ​​there are common problems of short service life, high bag breaking rate and high maintenance cost.
There are also filter materials woven with 100% PTFE fibers. Although it has strong high-temperature chemical stability and wide industry adaptability, it is expensive, 600 yuan / m 2 , huge investment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 1. Pass the alkali-free glass fiber through a twisting machine and twist it into 80 glass fiber yarns.

[0022] 2. The glass fiber yarn is coated with polytetrafluoroethylene mixed solvent on its surface through the coating treatment machine, that is, the glass fiber yarn is dipped at room temperature for 12 seconds, that is, dipped in a 3m long solvent tank at a speed of 15m / min , and then dried at a high temperature of 180°C to coat the surface of the glass fiber yarn with a polytetrafluoroethylene film with a thickness of 15 μm to form a single-film glass fiber yarn.

[0023] The polytetrafluoroethylene mixed solvent mainly includes polytetrafluoroethylene emulsion, hydroxyl silicone oil emulsion, graphite emulsion and water, and its specific proportion (volume ratio) is: PTFE emulsion 18.5%, hydroxyl silicone oil emulsion 15.0%, graphite emulsion 12.5%, the rest for water. Due to the good chemical corrosion resistance of glass fiber, its softening temperature is as...

Embodiment 2

[0037] 1. Pass the medium-alkali glass fiber through a twisting machine and twist it into 45 glass fiber yarns.

[0038] 2. The glass fiber yarn is coated with a polytetrafluoroethylene mixed solvent on its surface through a coating treatment machine, that is, the glass fiber yarn is dipped for 15 sec at room temperature, that is, dipped in a 3m long solvent tank at a speed of 12m / min. Then, it is dried at a high temperature of 185° C., so that the surface of the glass fiber yarn is coated with a polytetrafluoroethylene film with a thickness of 18 μm to form a single-film glass fiber yarn.

[0039] The polytetrafluoroethylene mixed solvent mainly includes polytetrafluoroethylene emulsion, hydroxyl silicone oil emulsion, phenylmethyl silicone oil and water, and its specific ratio (volume ratio) is: PTFE emulsion 19.0%, hydroxyl silicone oil emulsion 14.8%, benzyl Silicone oil 12.0%, the rest is water. Due to phenylmethyl silicone oil, good lubricity, small temperature viscosit...

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Abstract

A dual teflon films combined filtering material is prepared from glass fibers through twisting to become glass fiber yarns, coating teflon film by immersing in teflon solution and baking, weaving to obtain raw fabric, and covering a teflon film on its surface.

Description

Technical field [0001] The invention relates to a filter material, in particular to a polytetrafluoroethylene double-membrane composite filter material. Background technique [0002] The tail gas of industrial fuels mostly contains a large amount of harmful substances, such as sulfides, nitrogen oxides, cyanides, polycyclic hydrocarbons, etc. Once discharged into the atmosphere, it will become a major source of air pollution. At present, for the filtration of industrial fuel tail gas, various fibers such as glass, polyester, aramid, polyphenylene sulfide (PPS), P84, or various base fabrics covered with polytetrafluoroethylene (PTFE) membranes are mainly used. Under the working conditions of high temperature, high water content and high pH, ​​there are common problems of short service life, high bag breakage rate and high maintenance cost. There are also filter materials woven with 100% PTFE fibers. Although it has strong high-temperature chemical stability and wide industry...

Claims

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Application Information

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IPC IPC(8): B01D69/12B01D71/36
Inventor 程士平
Owner 江苏正大森源集团有限公司
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