CN102935318B - Application of waterproof filter element to respirator - Google Patents
Application of waterproof filter element to respirator Download PDFInfo
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- CN102935318B CN102935318B CN201210482572.9A CN201210482572A CN102935318B CN 102935318 B CN102935318 B CN 102935318B CN 201210482572 A CN201210482572 A CN 201210482572A CN 102935318 B CN102935318 B CN 102935318B
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Abstract
The invention discloses an application of a filter material and particularly an application of a waterproof filter element to a respirator. The waterproof filter element is arranged in a storage tank sterile respirator. The waterproof filter element disclosed by the invention is a folding microporous membrane filter element and is subjected to super-hydrophobic treatment, wherein the thickness of a folding microporous membrane ranges from 10mum to 300mum, and the average pore size ranges from 0.1mum to 5mum; and the super-hydrophobic treatment refers to the process of fixing a polymer of an organic compound containing silicon and fluorine elements on the surface of the filter membrane by using coating, grafting and depositing methods. The waterproof filter element has the advantages that the service life of the storage tank air respirator is greatly prolonged and the filtering effect is obviously enhanced; and in addition, the waterproof filter element can be used within a wider temperature range and is more convenient to assemble, replace and the like.
Description
Technical field
The present invention relates to a kind of application of filtering material, specifically refer to the application of a kind of waterproof filter element in respirator.
Background technology
In fields such as food and drink engineering, pharmaceutical engineering and engineering of water treatment, usually can use various storage tank, for storing other various material liquids such as such as distilled water, storage tank is generally sterile closed container, to ensure that the material liquid in storage tank is not subject to outside contamination.When the liquid level in storage tank changes, with regard to needing the pressure balance being kept storage tank by the breathing of air, at this time just need storage tank air respiratorresuscitator, it can make to remain germ-free condition in storage tank, ensures that product is from pollution.
Traditional storage tank air respiratorresuscitator generally selects cotton, gauze, activated carbon powder or filter paper etc. as filter medium, thus reaches gas pressure balancing inside and outside adjustment storage tank or container, ensures the object of gas in container cleaning.But these air respiratorresuscitator techniques are dangerous, stability, poor reliability, can not ensure that tank inside is not contaminated completely.
Thus present technique, generally adopts cylindrical filter cartridge as the filter medium of storage tank air respiratorresuscitator, as common collapsible micropore filter element.This collapsible micropore filter element, comprises its major part miillpore filter and is usually all made by macromolecule polymer material, relative to conventional filtration media, has the features such as technique is safer, stability better, filter effect is more excellent.
The miillpore filter of micropore filter element, with the wettability of relative pure water for standard, can be divided into hydrophilic microporous filter membrane and hydrophobic micropore filter membrane, thus the micropore filter element made can be divided into hydrophilic microporous filter core and hydrophobic micropore filter core.In the application of storage tank air respiratorresuscitator, hydrophobic micropore filter core can ensure that the moisture in storage tank is not adsorbed in the miillpore filter of filter core, is conducive to isolated bacterium like this.If hydrophilic microporous filter core, once miillpore filter is spontaneously wet out by water, air just can not freely pass through, and is equivalent to close respirator, and need the air of high pressure just can overcome its surface tension and pass through, this is very disadvantageous to the application of storage tank air respiratorresuscitator.So the micropore filter element being applied to air respiratorresuscitator must use hydrophobic micropore filter core, and usually select hydrophobic macromolecule polymer material for the manufacture of the material of hydrophobic micropore filter membrane, conventional as polypropylene, polytetrafluoroethylene (PTFE) etc.Chinese patent CN 1565713 discloses a kind of ptfe composite film, using glass fibre as basement membrane, being bondd compound as superficial layer and glass fibre by polytetrafluoroethylene (PTFE) for binding agent by pore-creating macromolecule film making solution.Glass fibre obtained thus and ptfe composite, intensity is large, and the circulation of unit are is large, greatly improves filter efficiency, effectively can improve the hydrophobicity of material, heat-resisting quantity and corrosivity simultaneously.
But, find in actual use, although there is hydrophobicity with the miillpore filter that hydrophobic polymer material is made as polytetrafluoroethylene (PTFE), in the use procedure of storage tank air respiratorresuscitator, because micropore filter element is in the environment containing a large amount of steam for a long time, thus use one to arrive after two months, whole filter core can be soaked by steam, causes the micropore of filter membrane to be blocked by steam, sluggish in air circulation, more than Air permenbility drop by half, thus need to change air respiratorresuscitator, add the cost of use.
The invention describes the improvement of air cellular filter core for the problems referred to above and miillpore filter thereof.
Summary of the invention
The present invention is directed to deficiency of the prior art, propose a kind of device with better filter effect, by a kind of filter core with waterproof effect in respirator.
The present invention is achieved by following technical proposals:
The application of waterproof filter element in respirator, is characterized in that, waterproof filter element is installed in the aseptic respirator of storage tank.Waterproof filter element in the present invention is folding microporous membrane filter element, and through super-hydrophobic process, wherein the thickness of folding miillpore filter is in the scope of 10 μm-300 μm, and average pore size is in the scope of 0.1 μm-5 μm; Described super-hydrophobic process refers to the method for the polymer of the organic compound of siliceous, fluorine element by coating, grafting, deposition, is fixed on filter membrane surface.
As preferably, the microporous membrane filter element in the application of above-mentioned a kind of waterproof filter element in respirator after super-hydrophobic process, wherein the contact angle of filter membrane to water reaches more than 130 °, and filter membrane reaches more than 100 ° for the contact angle of hexadecane.
As preferably, the microporous membrane filter element in the application of above-mentioned a kind of waterproof filter element in respirator after super-hydrophobic process, wherein filter core uses after 60 days under the environment of temperature more than 80 DEG C, relative humidity 80%, and its Air permenbility fall is less than 5%.
As preferably, in the application of above-mentioned a kind of waterproof filter element in respirator, the material of waterproof filter element is polypropylene or polytetrafluoroethylene (PTFE).
For achieving the above object, present invention employs following technical scheme: a kind of Super-hydrophobic micropore filter core, described micropore filter element is folding microporous membrane filter element, be made up of Super-hydrophobic micropore filter membrane, water conservancy diversion and miscellaneous part, and further across super-hydrophobic process, hydrophobicity scale reaches 12 grades, and oleophobic grade reaches 8 grades.Waterproof air filtering core of the present invention, under the environment of at least temperature 80 DEG C, relative humidity 80% after 60 days, there is not significant change in its Air permenbility.
Described Super-hydrophobic micropore filter membrane is obtained through super-hydrophobic process by common hydrophobic microporous filter membrane.Described super-hydrophobic process specifically refers to, by strong-hydrophobicity polymer by methods such as coating, grafting or depositions, it is made to be attached to common hydrophobic micropore filter membrane surface and inside thereof, thus make whole hydrophobic membrane filtration present super-hydrophobicity, do not affect the correlated performance of former hydrophobic microporous filter membrane simultaneously.Described Super-hydrophobic micropore filter membrane is macromolecule polymer material, as polypropylene, polytetrafluoroethylene (PTFE) etc.
Beneficial effect: enforcement of the present invention makes greatly extend the service life of storage tank air respiratorresuscitator, and filter effect obviously strengthens, and can use in wider temperature range, and assembling, replacing etc. are more convenient.
Detailed description of the invention
Below enforcement of the present invention is illustrated:
Embodiment 1
Respirator waterproof filter element in the present embodiment, forms primarily of waterproof miillpore filter, supporting layer and other parts.Wherein, described waterproof miillpore filter is that common miillpore filter obtains after super-hydrophobic process.
The waterproof filter element of respirator in the present embodiment, is installed in the aseptic respirator of storage tank; Waterproof filter element is folding microporous membrane filter element, and through super-hydrophobic process, wherein the thickness of folding miillpore filter is at about 20 μm, and average pore size is at about 0.2 μm; Described super-hydrophobic process refers to the method for the polymer of the organic compound of siliceous, fluorine element by coating, grafting, deposition, is fixed on filter membrane surface.Above-mentioned microporous membrane filter element after super-hydrophobic process, wherein the contact angle of filter membrane to water reaches more than 130 °, and filter membrane reaches more than 100 ° for the contact angle of hexadecane.
In the present embodiment, the material of waterproof filter element is polypropylene, and independent filter core is made as already known processes, by waterproof miillpore filter, center-pole, shell and end cap, makes a complete filter core; Be conventional fabrication process in water treatment field, the present invention, by using the application of technological know-how in respirator in water treatment field, embodies beyond thought effect.
Embodiment 2
The waterproof filter element of respirator in the present embodiment, is installed in the aseptic respirator of storage tank; Waterproof filter element is folding microporous membrane filter element, and through super-hydrophobic process, wherein the thickness of folding miillpore filter is at about 50 μm, and average pore size is at about 0.5 μm; Described super-hydrophobic process refers to the method for the polymer of the organic compound of siliceous, fluorine element by coating, grafting, deposition, is fixed on filter membrane surface.Above-mentioned microporous membrane filter element after super-hydrophobic process, wherein the contact angle of filter membrane to water reaches more than 130 °, and filter membrane reaches more than 120 ° for the contact angle of hexadecane.
In the present embodiment, the material of waterproof filter element is polypropylene, and independent filter core is made as already known processes, by waterproof miillpore filter, center-pole, shell and end cap, makes a complete filter core; Be conventional fabrication process in water treatment field, the present invention, by using the application of technological know-how in respirator in water treatment field, embodies beyond thought effect.
Embodiment 3
The waterproof filter element of respirator in the present embodiment, is installed in the aseptic respirator of storage tank; Waterproof filter element is folding microporous membrane filter element, and through super-hydrophobic process, wherein the thickness of folding miillpore filter is at about 100 μm, and average pore size is at about 2.5 μm; Described super-hydrophobic process refers to the method for the polymer of the organic compound of siliceous, fluorine element by coating, grafting, deposition, is fixed on filter membrane surface.Above-mentioned microporous membrane filter element after super-hydrophobic process, wherein the contact angle of filter membrane to water reaches more than 140 °, and filter membrane reaches more than 120 ° for the contact angle of hexadecane.And above-mentioned microporous membrane filter element, wherein filter core uses after 60 days under the environment of temperature more than 80 DEG C, relative humidity 80%, and its Air permenbility fall is less than 5%.
In the present embodiment, the material of waterproof filter element is polypropylene, and independent filter core is made as already known processes, by waterproof miillpore filter, center-pole, shell and end cap, makes a complete filter core; Be conventional fabrication process in water treatment field, the present invention, by using the application of technological know-how in respirator in water treatment field, embodies beyond thought effect.
Embodiment 4
The waterproof filter element of respirator in the present embodiment, is installed in the aseptic respirator of storage tank; Waterproof filter element is folding microporous membrane filter element, and through super-hydrophobic process, wherein the thickness of folding miillpore filter is at about 300 μm, and average pore size is at about 3.5 μm; Described super-hydrophobic process refers to the method for the polymer of the organic compound of siliceous, fluorine element by coating, grafting, deposition, is fixed on filter membrane surface.Above-mentioned microporous membrane filter element after super-hydrophobic process, wherein the contact angle of filter membrane to water reaches more than 140 °, and filter membrane reaches more than 130 ° for the contact angle of hexadecane.
In the present embodiment, the material of waterproof filter element is polypropylene, and independent filter core is made as already known processes, by waterproof miillpore filter, center-pole, shell and end cap, makes a complete filter core; Be conventional fabrication process in water treatment field, the present invention, by using the application of technological know-how in respirator in water treatment field, embodies beyond thought effect.
The super-hydrophobic process of common miillpore filter described in the present embodiment, concrete processing method, normally by strong-hydrophobicity polymer, is attached to surface and the inside of filter membrane by physics or chemical method.Described strong-hydrophobicity polymer, comprises the polymer of the organic chemistry material of the elements such as siliceous, fluorine, as the emulsion of various fluorochemical.Described physics or chemical method, can select any known maturation process, and conventional comprises coating, grafting, deposition etc.Such as, immersed by miillpore filter and have in the emulsion of super-hydrophobicity, soak time is 1-10min, then at 30-80 DEG C, dries 1-20min respectively, at 100-250 DEG C, dry 1-10min.
With the miillpore filter after the method process, classification of waterproof reaches 12 grades, and grease proofing grade reaches 8 grades.
Classification of waterproof test adopts 3M-II-1988 standard.
Method of testing: isopropyl alcohol and water is mixed in varing proportions, configuration standard test fluid system.From harmonic series reagent, get drop treating on test sample cloth cloth cover, if nonwetting in 10s, for passing through, to not passing through.Getting finally by rank is that product refuses water rank.
Following table is 3M-II-1988 water repellency test reagent
| Embodiment | Water grade | Isopropyl alcohol (wt%) | Deionized water (wt%) |
| 5 | 1 | 2 | 98 |
| 6 | 2 | 5 | 95 |
| 7 | 3 | 10 | 90 |
| 8 | 4 | 20 | 80 |
| 9 | 5 | 30 | 70 |
| 10 | 6 | 40 | 60 |
| 11 | 7 | 50 | 50 |
| 12 | 8 | 60 | 40 |
| 13 | 9 | 70 | 30 |
| 14 | 10 | 80 | 20 |
| 15 | 11 | 90 | 10 |
| 16 | 12 | 100 | 0 |
Grease proofing level estimate adopts AATCC-118 standard.
Method of testing: first by the experimental liquid of lowest number, carefully drip on filter membrane with 0.05mL liquid, if occurred without infiltration and wetting phenomena in 30s, then and then drip on filter membrane with the experimental liquid of higher number, until experimental liquid in 30s cannot the fountain solution side of dripping and around till filter membrane.The grease proofing grade of filter membrane represents with the experimental liquid of the highest numbering that can not soak filter membrane in 30s.
Following table is that AATCC-118 refuses oily test agent
Described miillpore filter is after super-hydrophobic process, and its main performance such as Air permenbility does not change.
Air permenbility is measured and is adopted Gurley air permeability instrument.Under a steady pressure, the gas (25-300mL) measuring certain volume flows through the time needed for sample of particular area.Air pressure is provided by the cylinder with special diameter and standard weights, it can be free to slide in the outer cylinder that Seal Oil is housed, sample to be tested is clipped between Gaskets, and pad center allows gas to flow through with aperture, and aperture is 1.0,0.25 or 0.1inch
2.
Tell the already known processes that filter core makes, refer to the techniques such as folding, injection moulding, welding.
Optionally, after described waterproof miillpore filter is processed into filter core, by waterproof filter element in the same way, super-hydrophobic process can be carried out further.
Described respirator, refers to storage tank air respiratorresuscitator, the use of waterproof filter element, can make filter core under the environment of high humility, and long-time use also can not be wetted, and namely the filtration fenestra of miillpore filter by blockings such as steam, thus can not extend the service life of respirator.
Embodiment 25
Configuration fluoropolymer content is the treatment fluid of 1%, and selected poly tetrafluoroethylene is immersed 1min in treatment fluid, dry at 70 DEG C, then solidifies at 150 DEG C.
Embodiment 26
Configuration fluoropolymer content is the treatment fluid of 1%, and selected poly tetrafluoroethylene is immersed 5min in treatment fluid, is with a in described selected poly tetrafluoroethylene and embodiment 1, dry at 70 DEG C, then solidifies at 150 DEG C.
Embodiment 27
Configuration fluoropolymer content is the treatment fluid of 5%, and selected poly tetrafluoroethylene is immersed 1min in treatment fluid, is with a in described selected poly tetrafluoroethylene and embodiment 1, dry at 70 DEG C, then solidifies at 150 DEG C.
Following table is the change of waterproof filter membrane Air permenbility
Claims (2)
1. the application of waterproof filter element in respirator, is characterized in that, waterproof filter element is installed in the aseptic respirator of storage tank; Wherein waterproof filter element is folding microporous membrane filter element, and through super-hydrophobic process, wherein the thickness of folding miillpore filter is in the scope of 10 μm-300 μm, and average pore size is in the scope of 0.1 μm-5 μm; Described super-hydrophobic process refers to the method for the polymer of the organic compound of siliceous, fluorine element by coating, grafting, deposition, is fixed on filter membrane surface;
Above-mentioned folding microporous membrane filter element after super-hydrophobic process, wherein the folding contact angle of miillpore filter to water reaches more than 130 °, folding miillpore filter reaches more than 100 ° for the contact angle of hexadecane, and the folding microporous membrane filter element after super-hydrophobic process, wherein folding microporous membrane filter element uses after 60 days under the environment of temperature more than 80 DEG C, relative humidity 80%, and its Air permenbility fall is less than 5%.
2. the application of a kind of waterproof filter element according to claim 1 in respirator, is characterized in that, the material of waterproof filter element is polypropylene or polytetrafluoroethylene (PTFE).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210482572.9A CN102935318B (en) | 2012-11-22 | 2012-11-22 | Application of waterproof filter element to respirator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210482572.9A CN102935318B (en) | 2012-11-22 | 2012-11-22 | Application of waterproof filter element to respirator |
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| CN102935318A CN102935318A (en) | 2013-02-20 |
| CN102935318B true CN102935318B (en) | 2015-05-20 |
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| CN106671498A (en) * | 2016-12-04 | 2017-05-17 | 杭州科百特过滤器材有限公司 | Waterproof and breathable film for infusion |
| CN117258547B (en) * | 2023-08-28 | 2024-03-01 | 杭州科百特过滤器材有限公司 | Folding nanofiltration membrane filter device and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5126054A (en) * | 1990-05-24 | 1992-06-30 | Pall Corporation | Venting means |
| JPH11169622A (en) * | 1997-12-08 | 1999-06-29 | Nitto Denko Corp | Air-permeable filter and air passable member |
| CN1564655A (en) * | 2001-10-11 | 2005-01-12 | 大金工业株式会社 | Ventilation filter member for container, and container and container cap for container provided with the ventilation filter member |
| CN102259722A (en) * | 2011-05-05 | 2011-11-30 | 常州市泛亚微透科技有限公司 | Waterproof, anticorrosive and air-permeable expanded polytetrafluoroethylene (e-PTFE) material modified membrane for packing bottle cap and preparation method thereof |
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2012
- 2012-11-22 CN CN201210482572.9A patent/CN102935318B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5126054A (en) * | 1990-05-24 | 1992-06-30 | Pall Corporation | Venting means |
| JPH11169622A (en) * | 1997-12-08 | 1999-06-29 | Nitto Denko Corp | Air-permeable filter and air passable member |
| CN1564655A (en) * | 2001-10-11 | 2005-01-12 | 大金工业株式会社 | Ventilation filter member for container, and container and container cap for container provided with the ventilation filter member |
| CN102259722A (en) * | 2011-05-05 | 2011-11-30 | 常州市泛亚微透科技有限公司 | Waterproof, anticorrosive and air-permeable expanded polytetrafluoroethylene (e-PTFE) material modified membrane for packing bottle cap and preparation method thereof |
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Effective date of registration: 20161129 Address after: Hangzhou City, Zhejiang province 310053 Xiaoshan River Town Village Zixia Patentee after: Hangzhou Cobetter Filtration Equipment Co., Ltd. Address before: Hangzhou City, Zhejiang province 310053 Xiaoshan River Town Village Zixia Patentee before: Hangzhou Feir Filter Technology Co., Ltd. |