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Method for improving acid-resisting performance of polyamide filter materials

A technology of polyamide and filter material, which is applied in the field of post-finishing of high-temperature flue gas filter materials, and can solve the problems such as limiting the use range of polyamide filter materials.

Active Publication Date: 2014-05-21
XIAMEN ZHONGCHUANG ENVIRONMENTAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to a structural defect in polyamide filter materials, that is, the amide groups in the long-chain fiber molecules are formed by dehydration and polycondensation, and are easily hydrolyzed in an acidic environment, thus limiting the use of polyamide filter materials. scope of use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The filter material used is: amide filter material

[0015] Preparation of finishing agent

[0016] Raw material formula

[0017] Element Weight percentage (%) Polytetrafluoroethylene (PTFE) Emulsion 70 A silane coupling agent 1 water 29

[0018] configuration method

[0019] First add 29% water, then add 1% coupling agent, then add 70% polytetrafluoroethylene (PTFE) emulsion, stir for 1 to 2 hours, make it evenly mixed, and make a finishing agent.

[0020] finishing method

[0021] First, the finishing agent is evenly coated on the surface of the amide filter material, and then through drying (100°C-180°C, 20-30 minutes), baking (200-250°C, 5-10 minutes) and other processes, the filter material A solid polytetrafluoroethylene (PTFE) layer is formed on the surface, and the average weight gain of the amide filter material is 10g / m after testing 2 .

Embodiment 2

[0023] The filter material used is: amide filter material

[0024] Preparation of finishing agent

[0025] Raw material formula

[0026] Element Weight percentage (%) Polytetrafluoroethylene (PTFE) Emulsion 70 A silane coupling agent 2 water 28

[0027] configuration method

[0028] First add 28% water, then add 2% coupling agent, then add 70% polytetrafluoroethylene (PTFE) emulsion, and stir fully for 1 to 2 hours at normal temperature and pressure to make it evenly mixed. Finishing agent.

[0029] finishing method

[0030] First, the finishing agent is evenly coated on the surface of the amide filter material, and then through drying (100°C-180°C, 20-30 minutes), baking (200-250°C, 5-10 minutes) and other processes, the filter material A solid polytetrafluoroethylene (PTFE) layer is formed on the surface of the filter material. After testing, the average weight gain of the amide filter material is 20g / m 2 .

Embodiment 3

[0032] The filter material used is: amide filter material

[0033] Preparation of finishing agent

[0034] Raw material formula

[0035] Element Weight percentage (%) Polytetrafluoroethylene (PTFE) Emulsion 80 A silane coupling agent 1 water 19

[0036] configuration method

[0037] First add 19% water, then add 1% coupling agent, then add 80% polytetrafluoroethylene (PTFE) emulsion, and stir thoroughly for 1 to 2 hours at normal temperature and pressure to make it evenly mixed. Finishing agent.

[0038] finishing method

[0039] First, the finishing agent is evenly coated on the surface of the amide filter material, and then through drying (100°C-180°C, 20-30 minutes), baking (200-250°C, 5-10 minutes) and other processes, the filter material A solid polytetrafluoroethylene (PTFE) layer is formed on the surface of the surface, and the average weight gain of the amide filter material is 10 / m after testing 2 .

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PUM

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Abstract

The invention discloses a method for improving acid-resisting performance of polyamide filter materials, which comprises steps of firstly according to mass percent, mixing 3-5% of coupling agents, 70-80% of polytetrafluoroethylene (PTFE) emulsion and 17-27% of water, and stirring the mixture for 1-2 hours to obtain finishing agents; and then evenly coating the finishing agents onto the surfaces of the filter materials, and performing drying and baking processing to form PTFE layers on the surfaces of the polyamide filter materials. Therefore, direct contact between acidic materials and the polyamide filter materials can be isolated, the acid-resisting performance is achieved, and the application range of the polyamide filter materials is enlarged.

Description

technical field [0001] The invention relates to a post-finishing method for high-temperature flue gas filter materials, in particular to the surface finishing of polyamide filter materials, which can greatly improve the anti-acid performance of polyamide filter materials. Background technique [0002] With the increasing emphasis on environmental protection, more and more companies are currently using industrial flue gas filter materials. Flue gas treatment enterprises such as iron and steel, power generation and waste incineration have an increasing demand for filter materials, and at the same time have higher and higher requirements for the quality of filter materials: filter materials must not only have good filtration performance, but also be resistant to high temperature and high temperature. Corrosion and long service life. Relatively speaking, polyamide filter materials (such as aramid fiber, polyimide, polysulfone fiber, etc.) not only have good heat resistance, but...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06N3/04D06M15/256D06M101/34B01D39/00
Inventor 蔡伟龙乐世平罗祥波郑锦森
Owner XIAMEN ZHONGCHUANG ENVIRONMENTAL TECH CO LTD