Modified PPS (polyphenylene sulfide) and PTFE (polytetrafluoroethylene) layered coating method for glass fiber filter material

A technology of polytetrachlorethylene and polyphenylene sulfide, applied in separation methods, filtration separation, fiber treatment, etc., can solve the problems of high melt viscosity that cannot be completely melted and leveled, and poor oxidation resistance of polyphenylene sulfide needle felt , high post-processing equipment requirements, etc., to achieve the effect of improving thermal stability and leveling performance, low cost, and simple manufacturing process

Inactive Publication Date: 2014-12-24
九江市欧信得环保技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In actual production, it was found that a single polyphenylene sulfide needle felt has poor oxidation resistance and cannot adapt to the purification effect under high oxygen conditions.
Although a single PTFE fiber needle felt has water repellency and good oxidation resistance, it is expensive and requires high post-processing equipment, which increases production costs
In addition, the anti-sticking properties of the filter material can be improved by preparing a coating with polytetrafluoroethylene powder and coating it on the filter base cloth. However, due to the high melt viscosity of polytetrafluoroethylene, it cannot be completely melted and leveled. Poor, prone to pinholes, low binding ability of the coating

Method used

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  • Modified PPS (polyphenylene sulfide) and PTFE (polytetrafluoroethylene) layered coating method for glass fiber filter material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Preparation of glass fiber needled felt base cloth: select glass fiber needled felt base cloth, and make filter material base cloth through carding, web laying, and needle punching processes.

[0025] Preparation of hyperbranched polyphenylene sulfide: Add 10g of 3,4-dichlorothiophenol, 13.4g of anhydrous potassium carbonate and 80mL of N-methylpyrrolidone into a 250mL three-necked flask, heat to 150°C, and keep warm for 8.5h. The product was washed and filtered with hydrochloric acid, dissolved in tetrahydrofuran, extracted with hexane, filtered and dried to obtain light brown hyperbranched PPS powder with a degree of polymerization of 8-12.

[0026] Preparation of modified polyphenylene sulfide fiber emulsion: 6% by mass percentage of linear polyphenylene sulfide powder, 4% hyperbranched polyphenylene sulfide powder, and the balance being mixed with water, and then mixed evenly by an ultrasonic cleaner. Formulated as a lotion.

[0027] Preparation of primer: mix 35% ...

Embodiment 2

[0032] Preparation of glass fiber needled felt base cloth: select glass fiber needled felt base cloth, and make filter material base cloth through carding, web laying, and needle punching processes.

[0033] Preparation of hyperbranched polyphenylene sulfide: Add 10g of 3,4-dichlorothiophenol, 13.4g of anhydrous potassium carbonate and 80mL of N-methylpyrrolidone into a 250mL three-necked flask, heat to 150°C, and keep warm for 8.5h. The product was washed and filtered with hydrochloric acid, dissolved in tetrahydrofuran, extracted with hexane, filtered and dried to obtain light brown hyperbranched PPS powder with a degree of polymerization of 8-12.

[0034] Preparation of modified polyphenylene sulfide fiber emulsion: 12% by mass percentage of linear polyphenylene sulfide powder, 3% hyperbranched polyphenylene sulfide powder, and the balance being mixed with water, and then mixed evenly by an ultrasonic cleaner. Formulated as a lotion.

[0035] Preparation of primer: mix 35%...

Embodiment 3

[0040] Preparation of glass fiber needle-punched felt base cloth: select glass fiber needle-punched base cloth, and make filter material base cloth through carding, web laying, and needle-punched processes.

[0041] Preparation of hyperbranched polyphenylene sulfide: Add 10g of 3,4-dichlorothiophenol, 13.4g of anhydrous potassium carbonate and 80mL of N-methylpyrrolidone into a 250mL three-necked flask, heat to 150°C, and keep warm for 8.5h. The product was washed and filtered with hydrochloric acid, dissolved in tetrahydrofuran, extracted with hexane, filtered and dried to obtain light brown hyperbranched PPS powder with a degree of polymerization of 8-12.

[0042]Preparation of modified polyphenylene sulfide fiber emulsion: 8% by mass percentage of linear polyphenylene sulfide powder, 3% hyperbranched polyphenylene sulfide powder, and the balance being mixed with water, and then mixed evenly by an ultrasonic cleaning machine. Formulated as a lotion.

[0043] Preparation of ...

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Abstract

A modified PPS (polyphenylene sulfide) and PTFE (polytetrafluoroethylene) layered coating method for a glass fiber filter material comprises the following steps: glass fiber needled base cloth is selected and prepared into filter material base cloth after carding, lapping and needling processes; linear PPS and hyperbranched PPS are mixed to prepare modified PPS emulsion; the modified PPS emulsion, PTFE emulsion and a fluorine-containing silane coupling agent are mixed to prepare priming paint; the PTFE emulsion, the fluorine-containing silane coupling agent and F46 emulsion are mixed to prepare surface paint; the filter material base cloth is dipped in the priming paint and subjected to high-temperature curing and furnace cooling to prepare a bottom layer; and the surface paint is sprayed to the surface of the bottom layer by a spray gun, and a finished product is obtained after high-temperature plasticizing. With adoption of the preparation method, the produced composite filter material has good thermal stability, corrosion resistance and higher mechanical strength, fiber dispersion and density of the finished product are improved, the manufacture process is simple and lower in cost, and large-scale industrial production is facilitated.

Description

technical field [0001] The invention relates to a surface coating method of glass fiber needle-punched filter material, in particular to a modified polyphenylene sulfide / polytetrachloroethylene layered coating method of glass fiber filter material. Background technique [0002] At present, high-temperature-resistant filter materials have been widely used in industrial fields such as power generation and cement. Filter materials are the main components of gas-solid separation devices, and their performance directly determines the quality of the filter. Glass fiber needle punched filter material is a kind of high temperature resistant filter material with reasonable structure and good performance. Not only does glass fabric have the characteristics of high temperature resistance, corrosion resistance, stable size, and small expansion rate, but also the single fiber structure has three-dimensional micropores, high porosity, and low resistance to gas filtration. It is a more eff...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/63D06M15/256D06M13/50B01D39/14
Inventor 袁振其
Owner 九江市欧信得环保技术有限公司
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