CN102527158A - High-temperature resistant filtering material - Google Patents
High-temperature resistant filtering material Download PDFInfo
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- CN102527158A CN102527158A CN2010106243545A CN201010624354A CN102527158A CN 102527158 A CN102527158 A CN 102527158A CN 2010106243545 A CN2010106243545 A CN 2010106243545A CN 201010624354 A CN201010624354 A CN 201010624354A CN 102527158 A CN102527158 A CN 102527158A
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- cloth layer
- polytetrafluoroethylene
- superfine fibre
- polyphenylene sulfide
- ptfe
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Abstract
The invention discloses a high-temperature resistant air filtering material which comprises a base fabric layer, wherein a superfine fiber non-woven fabric layer is attached to at least one surface of the base fabric layer. The superfine fiber non-woven fabric layer is a polytetrafluoroethylene or polyphenylene sulfide superfine fiber non-woven fabric layer prepared by an electrostatic spinning method. The high-temperature resistant air filtering material has excellent chemical stability and thermal stability, and can realize effective filtration of the particles (PM2.5) capable of entering lung; and meanwhile, the loss of filtration pressure is little, and the material has broad application prospect in filtering high-temperature flue gas and special gas thermal medium.
Description
Technical field
The present invention relates to a kind of filtering material, be specifically related to a kind of resistant to elevated temperatures filtering material.
Background technology
Along with the quickening of process of industrialization, atmosphere pollution has become a China and even a global increasingly serious problem.Meanwhile, also increasingly high like industries such as semi-conductor industry and biological industries to the requirement of air cleaning degree.The environmental legislation of various countries also improves the standard of air cleaning degree gradually.
For satisfying above-mentioned requirements, many because the material of excellent properties is developed into filter medium.Wherein, polytetrafluoroethylene (PTFE) and polyphenylene sulfide (PPS) are outstanding persons wherein.A series of performances of solely holding such as polytetrafluoroethylene (PTFE) has serviceability temperature scope wide (250～260 ℃), chemical stability is good, dielectric properties are good, self lubricity and antistick characteristic, its range of application is extremely wide.With the PTFE fiber that polytetrafluoroethylene (PTFE) is processed, major advantage is unique chemical resistance, comprises all known acid, alkali, halogen and oxidant etc.Its chemical resistance is the highest in all commercial organic fibers, even also be like this under high-temperature condition.At present, only find that some perfluorinate organic solvent can dissolve polytetrafluoroethylene fibre, but temperature to reach more than 300 ℃.PPS is a kind of crystalline polymer of excellent combination property, and it has good high temperature resistant, corrosion-resistant, radiation hardness, fire-retardant, balanced physical and mechanical properties and fabulous dimensional stability and good characteristics such as electrical property.And have excellent heat endurance and anti-flammability with the PPS fiber that polyphenylene sulfide is processed, and oxygen index value 34～35, strength retention is 60% in the time of 200 ℃, the extension at break no change; Chemical resistance is only second to polytetrafluoroethylene fibre; Textile processibility ability is preferably arranged.At present, the air filter bag of processing with PTFE or PPS fiber has been widely used in the filtration of high-temperature flue gas and special thermal medium.
Yet along with to the increasing of the requirement of air cleaning degree, especially to going into the concern of lung particle (PM2.5) harm, the air filter bag that adopts common PTFE or PPS fiber to process has been difficult to satisfy the requirement of people to the air cleaning degree.In order to tackle this demand, general solution is an e-PTFE overlay film filter bag in high temperature resistant gas filtration field at present--the skin of the air filter bag promptly processed at common heat resistant fibre covers one deck e-PTFE film.But this e-PTFE film is increasing when can go into lung particle (PM2.5) arresting efficiency, also increases the pressure loss when filtering greatly, has increased energy consumption.
Summary of the invention
To the problem of above-mentioned existence, the invention provides a kind of fire resistant filter material, it can realize not only that to going into effective filtration of lung particle (PM2.5) the more existing e-PTFE overlay film filter bag of its filter pressure loss also reduces greatly simultaneously.
Technical solution of the present invention is following:
A kind of high temperature resistant air filting material comprises base cloth layer, and the one side at least of base cloth layer is attached with the superfine fibre nonwoven cloth layer; Wherein, Said superfine fibre nonwoven cloth layer is polytetrafluoroethylene (PTFE) or polyphenylene sulfide superfine fibre nonwoven cloth layer; The aperture of this nonwoven layer is 0.1 μ m～10 μ m, and thickness is 20～80 μ m, and the average diameter that constitutes the superfine fibre of superfine fibre nonwoven cloth layer is 0.1 μ m～5 μ m; Base cloth layer is selected from one or more in contraposition aromatic polyamide fibre, meta-aromatic polyamide fiber, polytetrafluoroethylene fibre, polyphenylene sulfide fibre, polyimide fiber, fluorine cellulose fiber, carbon fiber or the glass fibre.
Cover above-mentioned polytetrafluoroethylene (PTFE) or polyphenylene sulfide superfine fibre nonwoven cloth layer through the compound mode of hot pressing or the mode of chemical adhesion on the above-mentioned base cloth layer.Consider the compound fastness when high temperature, be preferably the compound mode of hot pressing; Promptly on base cloth, cover polytetrafluoroethylene (PTFE) or the polyphenylene sulfide superfine fibre nonwoven cloth layer of last layer through the method preparation of electrostatic spinning with the compound mode of hot pressing.180 ℃～350 ℃ of hot pressing temperatures, hot pressing pressure 3MPa～5MPa.Base cloth layer of the present invention provides intensity preferably, and polytetrafluoroethylene (PTFE) or polyphenylene sulfide superfine fibre nonwoven cloth layer can increase going into the arresting efficiency of lung particle (PM2.5) greatly.Constitute the fiber of base cloth layer, get final product so long as have stable on heating fiber.Consider when the material of base cloth layer and polytetrafluoroethylene (PTFE) or polyphenylene sulfide superfine fibre nonwoven cloth layer is identical, can give full play to the chemical stability and the heat endurance of material and obtain compound preferably fastness, be preferably polytetrafluoroethylene fibre or polyphenylene sulfide fibre.Polytetrafluoroethylene (PTFE) or polyphenylene sulfide superfine fibre nonwoven cloth layer are by forming through the polytetrafluoroethylene (PTFE) or the polyphenylene sulfide superfine fibre of electrostatic spinning preparation, and its even structure has network-like microcellular structure, and porosity is high, and resistance is little, and filter efficiency is high.In addition, polytetrafluoroethylene (PTFE) and polyphenylene sulfide all have excellent chemical stability and heat endurance.
Above-mentioned polytetrafluoroethylene (PTFE) or polyphenylene sulfide superfine fibre nonwoven cloth layer are prepared by electrostatic spinning; Wherein, Electrostatic spinning is to carry polytetrafluoroethylene (PTFE) or polyphenylene sulfide particulate through the electrostatic spinning moulding by the matrix polymer solution that is easy to electrostatic spinning, removes matrix polymer again and processes polytetrafluoroethylene (PTFE) or polyphenylene sulfide superfine fibre nonwoven cloth.
Concrete preparation process: polyphenylene sulfide particulate or polytetrafluoroethylene (PTFE) microparticulate are obtained in matrix polymer solution in the dispersion liquid type spinning solution; Wherein matrix polymer solution is preferably polyvinyl alcohol water solution, and the solid content mass percent of dispersion liquid type spinning solution is 10～50%; Above-mentioned dispersion liquid type spinning solution is prepared precursor through electrostatic spinning; Voltage was 5kv～40kv when electricity spun; Receiving range (shower nozzle to receiving terminal distance) is 5cm～25cm, then precursor is removed matrix polymer at 250～400 ℃ of following heat treatment 30s-10min and obtains polytetrafluoroethylene (PTFE) or polyphenylene sulfide superfine fibre nonwoven cloth.
Then, carry out hot pressing through the high temperature hot-rolling and be laminated with, cover polytetrafluoroethylene (PTFE) or the polyphenylene sulfide superfine fibre nonwoven cloth of last layer through the method preparation of electrostatic spinning on the base cloth layer surface.
The diameter of polyphenylene sulfide particulate or polytetrafluoroethylene (PTFE) particulate is preferably 10-500nm.
This high temperature resistant air filting material of the present invention is with a wide range of applications in the filtration of high-temperature flue gas and special gas thermal medium owing to have the performance of above excellence.
Description of drawings
Fig. 1 is the structural representation of the high temperature resistant air filting material that the present invention relates to; Wherein, 1 is the superfine fibre nonwoven cloth layer, and 2 is base cloth layer.
The specific embodiment
To help to understand the present invention through following examples, but not limit content of the present invention.Polyphenylene sulfide particulate and Nomex are that Dongli Ltd. is self-produced among the embodiment, and all the other medicines are available from Chemical Reagent Co., Ltd., Sinopharm Group.
Among the embodiment aperture of superfine fibre average diameter and superfine fibre nonwoven cloth through ESEM (JSM-6700F, JEOL, Japan) observation, concrete method be observation 50 data get its mean value.
(MT3300, NIKKISO Japan) measure the particle diameter of polyphenylene sulfide particulate through particles distribution instrument.
The filter efficiency and the pressure loss to 1～2 μ m atmospheric dust are tested by homemade atmospheric dust experimental machine; Promptly the test wind speed with 3.0m/min passes through filtering material with air and 1～2 μ m atmospheric dust, and the pressure before and after metering is filtered changes and the variation of atmospheric dust before and after testing.
With diameter is that 200nm polyphenylene sulfide microparticulate forms dispersion liquid type spinning solution in polyvinyl alcohol water solution, and wherein the concentration of polyphenylene sulfide particulate and polyvinyl alcohol is 12% (wt%).Again this spinning solution is at room temperature prepared precursor through electrostatic spinning, voltage was 25KV when electricity spun, and receiving range (shower nozzle to receiving terminal distance) is 18cm, then removes polyvinyl alcohol 350 ℃ of following heat treatments and obtains the polyphenylene sulfide superfine fibre nonwoven cloth.
Then, carry out hot pressing through the high temperature hot-rolling and be laminated with (260 ℃～290 ℃ of hot pressing temperatures, hot pressing pressure 4MPa), cover the PPS superfine fibre nonwoven cloth layer of last layer through the method preparation of electrostatic spinning on polyphenylene sulfide Nomex surface.The aperture of PPS superfine fibre nonwoven cloth layer is 0.5 μ m～3 μ m, and thickness is 30 μ m, and the average diameter that constitutes the superfine fibre of PPS superfine fibre nonwoven cloth layer is 0.8 μ m.Performance is seen table one.
With diameter is that the polytetrafluoroethylene (PTFE) microparticulate of 150nm forms dispersion liquid type spinning solution in polyvinyl alcohol water solution, and wherein the concentration of polyvinyl alcohol is 6% (wt%), and the concentration of polytetrafluoroethylene (PTFE) is 30% (wt%).Again this spinning solution is at room temperature prepared precursor through electrostatic spinning, voltage was 20KV when electricity spun, and receiving range (shower nozzle to receiving terminal distance) is 16cm, then removes polyvinyl alcohol 350 ℃ of following heat treatments and obtains the polytetrafluoroethylsuperfine superfine fiber nonwoven.
On the polytetrafluoroethylpunched punched felt surface, carry out hot pressing through the high temperature hot-rolling and be laminated with (290 ℃～320 ℃ of hot pressing temperatures, hot pressing pressure 5MPa), cover the PTFE superfine fibre nonwoven cloth layer of last layer through the method preparation of electrostatic spinning.The aperture of PTFE superfine fibre nonwoven cloth layer is 0.3 μ m～1 μ m, and thickness is 20 μ m, and the average diameter that constitutes the superfine fibre of PTFE superfine fibre nonwoven cloth layer is 0.6 μ m.Performance is seen table one.
Embodiment 3
With diameter is that the polytetrafluoroethylene (PTFE) microparticulate of 150nm forms dispersion liquid type spinning solution in polyvinyl alcohol water solution, and wherein the concentration of polyvinyl alcohol is 6% (wt%), and the concentration of polytetrafluoroethylene (PTFE) is 30% (wt%).Again spinning solution is at room temperature prepared precursor through electrostatic spinning, voltage was 20KV when electricity spun, and receiving range (shower nozzle to receiving terminal distance) is 16cm, then removes polyvinyl alcohol 350 ℃ of following heat treatments and obtains the polytetrafluoroethylsuperfine superfine fiber nonwoven.
On the fiberglass needled mat surface, carry out hot pressing through the high temperature hot-rolling and be laminated with (300 ℃～320 ℃ of hot pressing temperatures, hot pressing pressure 5MPa), cover the PTFE superfine fibre nonwoven cloth layer of last layer through the method preparation of electrostatic spinning.The aperture of PTFE superfine fibre nonwoven cloth layer is 0.3 μ m～1 μ m, and thickness is 25 μ m, and the average diameter that constitutes the superfine fibre of PTFE superfine fibre nonwoven cloth layer is 0.6 μ m.Performance is seen table one.
Comparative Examples 1
On polyphenylene sulfide Nomex surface, carry out hot pressing through the high temperature hot-rolling and be laminated with (290 ℃～320 ℃ of hot pressing temperatures, hot pressing pressure 5MPa), cover last layer e-PTFE film.The aperture of e-PTFE film is 0.2 μ m～3 μ m, and thickness is 25 μ m.Performance is seen table one.
Table one
Claims (4)
1. high temperature resistant air filting material is characterized in that: comprise base cloth layer, the one side at least of base cloth layer is attached with the superfine fibre nonwoven cloth layer; Wherein, Said superfine fibre nonwoven cloth layer is polytetrafluoroethylene (PTFE) or polyphenylene sulfide superfine fibre nonwoven cloth layer; The aperture of this nonwoven layer is 0.1 μ m～10 μ m, and thickness is 20～80 μ m, and the average diameter that constitutes the superfine fibre of superfine fibre nonwoven cloth layer is 0.1 μ m～5 μ m; Base cloth layer is selected from one or more in contraposition aromatic polyamide fibre, meta-aromatic polyamide fiber, polytetrafluoroethylene fibre, polyphenylene sulfide fibre, polyimide fiber, fluorine cellulose fiber, carbon fiber or the glass fibre.
2. high temperature resistant air filting material according to claim 1 is characterized in that: cover the superfine fibre nonwoven cloth layer through the compound mode of hot pressing on the described base cloth layer.
3. high temperature resistant air filting material according to claim 1 is characterized in that: said base cloth layer is selected from polytetrafluoroethylene fibre or polyphenylene sulfide fibre.
4. high temperature resistant air filting material according to claim 1 is characterized in that: said polytetrafluoroethylene (PTFE) or polyphenylene sulfide superfine fibre nonwoven cloth layer are prepared by electrostatic spinning; Wherein, electrostatic spinning voltage is 5kv～40kv, and the receiving range of shower nozzle to receiving terminal is 5cm～25cm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010106243545A CN102527158A (en) | 2010-12-30 | 2010-12-30 | High-temperature resistant filtering material |
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| CN2010106243545A CN102527158A (en) | 2010-12-30 | 2010-12-30 | High-temperature resistant filtering material |
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| CN102527158A true CN102527158A (en) | 2012-07-04 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102814081A (en) * | 2012-08-13 | 2012-12-12 | 安德鲁工业纺织品制造(上海)有限公司 | Filtration material for dust removing equipment |
| CN103071339A (en) * | 2013-01-31 | 2013-05-01 | 孙熙 | Fabrication method of needling/spunlace and electrostatic spinning compound filtering material |
| CN103316543A (en) * | 2013-05-28 | 2013-09-25 | 盐城市维民布业有限公司 | Air cleaning filter material |
| CN104605533A (en) * | 2015-01-03 | 2015-05-13 | 浙江理工大学 | Filter-element-replaceable type mask with adsorption and filtration functions |
| CN105983275A (en) * | 2015-02-13 | 2016-10-05 | 东丽纤维研究所（中国）有限公司 | High-efficiency filtering material, and production method and application thereof |
| CN107497205A (en) * | 2012-10-09 | 2017-12-22 | 日东电工株式会社 | The manufacture method of filter filtration material and filter filtration material |
| WO2018152683A1 (en) * | 2017-02-22 | 2018-08-30 | W. L. Gore & Associates, Inc. | Layered filter assembly for enclosure protection |
| CN109260826A (en) * | 2018-09-21 | 2019-01-25 | 清华大学 | Ptfe surface modifies filtrate and preparation method thereof |
| CN109475799A (en) * | 2016-07-28 | 2019-03-15 | 松下知识产权经营株式会社 | Filter filtering material and the aircleaning facility for using it |
-
2010
- 2010-12-30 CN CN2010106243545A patent/CN102527158A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102814081A (en) * | 2012-08-13 | 2012-12-12 | 安德鲁工业纺织品制造(上海)有限公司 | Filtration material for dust removing equipment |
| CN107497205A (en) * | 2012-10-09 | 2017-12-22 | 日东电工株式会社 | The manufacture method of filter filtration material and filter filtration material |
| CN103071339A (en) * | 2013-01-31 | 2013-05-01 | 孙熙 | Fabrication method of needling/spunlace and electrostatic spinning compound filtering material |
| CN103316543A (en) * | 2013-05-28 | 2013-09-25 | 盐城市维民布业有限公司 | Air cleaning filter material |
| CN104605533A (en) * | 2015-01-03 | 2015-05-13 | 浙江理工大学 | Filter-element-replaceable type mask with adsorption and filtration functions |
| CN105983275A (en) * | 2015-02-13 | 2016-10-05 | 东丽纤维研究所（中国）有限公司 | High-efficiency filtering material, and production method and application thereof |
| CN109475799A (en) * | 2016-07-28 | 2019-03-15 | 松下知识产权经营株式会社 | Filter filtering material and the aircleaning facility for using it |
| CN109475799B (en) * | 2016-07-28 | 2021-01-19 | 松下知识产权经营株式会社 | Filter medium and air cleaning device using the same |
| WO2018152683A1 (en) * | 2017-02-22 | 2018-08-30 | W. L. Gore & Associates, Inc. | Layered filter assembly for enclosure protection |
| CN109260826A (en) * | 2018-09-21 | 2019-01-25 | 清华大学 | Ptfe surface modifies filtrate and preparation method thereof |
| CN109260826B (en) * | 2018-09-21 | 2020-01-21 | 清华大学 | Polytetrafluoroethylene surface modification filter material and preparation method thereof |
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Application publication date: 20120704 |