PTFE (polytetrafluoroethylene) composite filtering material and its manufacturing method

A composite filtration, PTFE technology, applied in filtration separation, separation methods, chemical instruments and methods, etc., can solve the problems of not meeting the requirements of smoke and dust filtration in special working conditions, poor oxidation resistance, poor chemical resistance, etc. The effect of high precision requirements, low running resistance, high tensile strength and corrosion resistance

Active Publication Date: 2012-02-22
昆山万瑞达工业纺织品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, under the high temperature and high corrosion conditions of waste incineration, cement, power plant, steel, chemical and other working conditions, ordinary filter materials can no longer meet the requirements of special working conditions for dust filtration
Many manufacturers use polyphenylene sulfide fiber, aramid fiber, P84 fiber, etc. to make filter materials, and some manufacturers directly use PTFE for filter dust bags, but the common feature of these fibers is that the cost is relatively high; Poor oxidation resistance, poor hydrolysis resistance, poor chemical resistance, low tensile strength, etc.

Method used

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  • PTFE (polytetrafluoroethylene) composite filtering material and its manufacturing method
  • PTFE (polytetrafluoroethylene) composite filtering material and its manufacturing method
  • PTFE (polytetrafluoroethylene) composite filtering material and its manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 1. The ultra-fine glass fiber yarn is made into 208tex glass fiber sewing through desolvation, merging, twisting and other processes; the sewing thread is made into high-strength and temperature-resistant sewing thread through PTFE emulsion impregnation, drying, sintering and other processes.

[0022] 2. Warp the above sewing thread, adopt rapier loom and plain weave process, and weave it into 280g / m 2 The sewing thread base fabric is processed; the advanced one-time warping process is adopted during warping to ensure consistent tension of the yarn.

[0023] 3. Needling the glass fiber on both sides of the above-mentioned sewing thread base cloth to form a glass fiber layer.

[0024] 4. Acupuncture PTFE short fibers on the surface of the basic dust-facing surface of the above-mentioned needled sewing thread to make 600g / m 2 PTFE+glass fiber composite filter material.

[0025] 5. The composite filter material is impregnated with polytetrafluoroethylene treatment soluti...

Embodiment 2

[0032] 1. The ultra-fine glass fiber yarn is made into 208tex glass fiber sewing thread through desolvation, merging, twisting and other processes; the sewing thread is made into high-strength and temperature-resistant sewing thread through PTFE emulsion impregnation treatment, drying, sintering and other processes .

[0033] 2. Warp the above sewing thread, adopt rapier loom and plain weave process, and weave it into 260g / m 2 Handle the sewing thread base fabric. The advanced one-step warping process is adopted during warping to ensure consistent yarn tension.

[0034] 3. Needling the glass fiber on both sides of the above-mentioned sewing thread base cloth to form a glass fiber layer.

[0035] 4. Acupuncture PTFE short fibers on the surface of the basic dust-facing surface of the above-mentioned needled sewing thread to make 550g / m 2 PTFE+glass fiber composite filter material.

[0036] 5. The above composite filter material is impregnated with polytetrafluoroethylene mix...

Embodiment 3

[0043] 1. The ultra-fine glass fiber yarn is made into 208tex glass fiber sewing thread through desolvation, merging, twisting and other processes; the sewing thread is made into high-strength and temperature-resistant sewing thread through PTFE emulsion impregnation treatment, drying, sintering and other processes .

[0044] 2. Warp the above sewing thread, adopt rapier loom and plain weave process, and weave it into 420g / m 2 Handle the sewing thread base fabric. The advanced one-step warping process is adopted during warping to ensure consistent yarn tension.

[0045] 3. Needling the glass fiber on both sides of the above-mentioned sewing thread base cloth to form a glass fiber layer.

[0046] 4. Make the surface spunlace PTFE fiber of the basic dust-facing surface of the above-mentioned needled sewing thread into 750g / m 2 PTFE+glass fiber composite filter material.

[0047] 5. The above composite filter material is impregnated with polytetrafluoroethylene mixed solution...

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PUM

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Abstract

The invention provides a PTFE composite filtering material with good comprehensive performances and low cost, as well as its manufacturing method. From a dust contact face, the PTFE composite filtering material of the invention comprises in order: a PTFE microporous membrane layer, a PTFE dipping treatment layer, a PTFE superfine surface layer, a glass fiber layer, a sewing thread base cloth layer, a glass fiber and a PTFE dipping treatment layer. The PTFE composite filtering material provided in the invention has extremely high tensile strength and corrosion resistance, good filtering performance, low operation resistance, low production cost and long service life, and is suitable for dust filtration in complicated working conditions like high operation temperature, strong corrosion, great dust content, high filtration accuracy requirement, thus being a novel filtering material of high cost performance.

Description

technical field [0001] The invention relates to a filter material and a manufacturing method thereof, in particular to a PTFE composite filter material and a manufacturing method thereof. Background technique [0002] The pollutants discharged in some complex environments (high temperature, high humidity, high corrosion, etc.) mainly include smoke, SO 2 , SO 3 (that is, the main component that causes low-temperature acid corrosion), NO X , HF, CO 2 , N 2 、H 2 O et al. It is characterized by high corrosiveness of the flue gas, high moisture content, large specific resistance of dust, and a lot of fine dust, and some viscous substances such as oil mist and fine flocs contained in the flue gas are easy to adhere to the filter material and cause the filter material to be blocked. . Therefore, higher requirements are put forward for the selection of filter materials. [0003] At present, under the high-temperature and high-corrosion working conditions of waste incineratio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D39/14B32B17/02B32B17/10B32B27/30
Inventor 宋朋泽
Owner 昆山万瑞达工业纺织品有限公司
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