CN101362035A - Expanded polytetrafluoroethylene bacteriostatic coated filter material and production method thereof - Google Patents
Expanded polytetrafluoroethylene bacteriostatic coated filter material and production method thereof Download PDFInfo
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- CN101362035A CN101362035A CNA2007100707277A CN200710070727A CN101362035A CN 101362035 A CN101362035 A CN 101362035A CN A2007100707277 A CNA2007100707277 A CN A2007100707277A CN 200710070727 A CN200710070727 A CN 200710070727A CN 101362035 A CN101362035 A CN 101362035A
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- bacteriostatic
- filter material
- base cloth
- bonding agent
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Abstract
The invention relates to an e-PTFE antibacterial film filter material which comprises a base fabric and an e-PTFE film. The base fabric and the e-PTFE film are mutually wreathed by an adhesive layer. The filter material is characterized in that the base fabric is processed by a bacteriostatic agent, namely that the bacteriostatic agent with a weight which is 2 wt percent to 15 wt percent of the weight of the base fabric is applied on the base fabric; or the adhesive in the adhesive layer contains the bacteriostatic agent and he bacteriostatic agent with a weight which is 2 wt percent to 15 wt percent of the weight of the adhesive is added in the adhesive. The invention also discloses a production method of the filter material. The filter material has the antibacterial and sterilizing function, thus being particularly applicable to the filter materials of air conditioner, ventilation filters, clean room filters and the like of the public places such as hospitals which have more bacteria; the use of the filter material is quite convenient and simple and the production method has simple and reasonable technique.
Description
Technical field
The present invention relates to expanded PTFE coated filter material and relevant method for manufacturing.
Background technology
The expanded PTFE coated filter material is because its high chemical stability, high-low temperature resistant, anti-aging, gas permeability, water proofing property, filter efficiency are good, to peel off the rate height be desirable dedusting filtrate to dust.The air cleaning, industrial dust improvement, gas cleaning dedusting, material recovery in fields such as electronics, medicine, mineral, metal, chemical industry, food etc. have been widely used in.The dedusting of existing expanded PTFE coated filter material is nothing more than following four kinds of principles: the mechanism that the electric charge that directly hold back, inertial collision, diffusion/Brownian movement and particle is captured by electret fiber is removed, but the dust granules part that is blocked after the filtration can be adsorbed on the filter filtration material surface, thereby cause secondary pollution in can be after the breeding of the thalline in dust granules after a while, and the expanded PTFE coated filter material in the filter do not possess antibacterial sterilizing function at present with new wind inlet chamber.
Chinese patent database is laminated with expanded PTFE and base cloth has carried out bibliographical information, and still, the expanded polytetrafluoroethylbacteriostatic bacteriostatic coated filter material with antibacterial sterilizing function does not carry out the technology report.
Summary of the invention
Primary technical problem to be solved by this invention is the expanded polytetrafluoroethylbacteriostatic bacteriostatic coated filter material that possesses bacteriostasis that provides at above-mentioned prior art present situation, it not only has the various performances of general expanded PTFE coated filter material, the function that also possesses antibacterial sterilization, be particularly suitable for the filtering material of the air-conditioning of the more public place of various thalline such as hospital and ventilation filter, clean room filter device etc., use very convenient simple.
Another technical problem to be solved by this invention is the production method of the expanded polytetrafluoroethylbacteriostatic bacteriostatic coated filter material that possesses bacteriostasis that provides at above-mentioned prior art present situation, and its technology advantages of simple is made easily.
The present invention solves the problems of the technologies described above the technical scheme that is adopted: a kind of expanded polytetrafluoroethylbacteriostatic bacteriostatic coated filter material, it includes base cloth, eptfe membrane, base cloth is laminated with together mutually by adhesive linkage and eptfe membrane, it is characterized in that base cloth handles through bacteriostatic agent, bacteriostatic agent is spread upon on the base cloth by 2～15% (wt) of base cloth weight; Or the bonding agent in the adhesive linkage contains bacteriostatic agent, by 2～15% (wt) of bonding agent weight bacteriostatic agent is added in the bonding agent.
Expanded polytetrafluoroethylbacteriostatic bacteriostatic coated filter material is meant the new type functional filtrate that can effectively kill with bacteria growing inhibiting and breeding.Antifungal mechanism and process: the bacteriostatic agent that the present invention uses is inorganic bacteriostatic agent, the inorganic ions bacteriostatic agent adopts the method for physical absorption ion-exchange mostly, with silver, copper, metal ions such as zinc are carried on porous material surface, metal ion is when contacting with bacterium, metal ion can slowly release, combine with bacterial cell membrane and memebrane protein, destroy its structure, enter the enzyme that destroys electron transport system behind the cell and with the DNA reaction, after thalline is killed, metal ion dissociates out again, contact with other bacterium colonies, carry out a new round and kill, go round and begin again, utilize this bacteriostasis of metal ion, reach the long-acting bacteriostatic purpose by slow releasing function.The present invention adopts inorganic bacteriostatic agent, compare with organic bacteriostatic agent commonly used, have anti-higher temperature, higher-security, higher long-acting bactericidal effect, can be scattered in water and organic solvent, can stand the processing temperature of thermoplastic material up to 350 ℃, its powder granularity is evenly distributed and the specially treated of powder surface process, makes it good compatibility, uniformly dispersed be arranged with multiple fiber and plastics, and drawing abillity and other application performance are not had influence.This series bacteriostatic agent is water-fast, acid and alkali-resistance, wash resistant, and illumination is aging, and resistance is difficult for producing.Almost all bacterial classifications (bacterium, fungi, yeast, mould, algae etc.) all there is the extremely strong ability of killing.Inorganic bacteriostatic agent generally has two kinds of liquid and powders, handles by different base cloths that each takes what he needs.Bacteriostatic agent can be selected bacteriostatic agent or their compounds of silver oxide, cupric oxide or zinc oxide series for use, and can contain an amount of coupling agent, dispersant and other auxiliary agent.
Liquid: outward appearance is light yellow, effective solid content: 28～30%, and viscosity: 13s, pH value 6～8.
Powder: outward appearance is the puffy powder of ivory buff, average grain diameter＜100nm, and apparent density can be by 0.1g/cm
3To 1.0g/cm
3
Described eptfe membrane is the e-PTFE film.
Described base cloth is selected all kinds of fiber cloth or the nonwoven of terylene, polypropylene fibre, sticking fibre, cotton, hair and mixed textile thing thereof for use.
Described bonding agent is selected bonding agents such as epoxy resin or polyurethane for use.
Described solvent is selected butanone, acetone, ethyl acetate or their mixed solvent for use.
The present invention solves the technical scheme that above-mentioned another technical problem adopts: a kind of production method of expanded polytetrafluoroethylbacteriostatic bacteriostatic coated filter material is characterized in that steps in sequence is:
(1) the antibacterial processing of base cloth: the liquid bacteriostatic agent is adopted methods such as padding method, infusion process, gunite, coating or brushing method, by 2～15% (wt) of base cloth weight bacteriostatic agent is evenly spread upon on the base cloth, then through oven for drying;
(2) bonding agent preparation: solubilizer in bonding agent through stirring, is configured to the solution for standby of 10～20% (wt);
(3) complex method: Method for bonding, promptly use gunite, coating or brushing method that the bonding agent that configures is coated in equably on the base cloth of antibacterial processing, be covered with eptfe membrane, heat baking on forming machine then, through the chill roll cooling, make expanded polytetrafluoroethylbacteriostatic bacteriostatic coated filter material again.Or heat seal, promptly the base cloth through antibacterial processing heats on hot-rolling, makes expanded polytetrafluoroethylbacteriostatic bacteriostatic coated filter material after being covered with the eptfe membrane pressing.
Or a kind of production method of expanded polytetrafluoroethylbacteriostatic bacteriostatic coated filter material is characterized in that steps in sequence is:
(1) bonding agent preparation: solubilizer in bonding agent, through stirring, be configured to the solution of 10～20% (wt), 2～15% the ratio of powder bacteriostatic agent in bonding agent weight progressively is added in the bonding agent, same through stirring, join to such an extent that antibacterial bonding agent is standby.
(2) complex method: with the preheating of base cloth elder generation, re-use the antibacterial bonding agent that gunite, coating or brushing method will configure and be coated in equably on the base cloth, be covered with eptfe membrane, heat baking on forming machine then, through the chill roll cooling, make expanded polytetrafluoroethylbacteriostatic bacteriostatic coated filter material again.
Preferably, heat baking temperature is under 150～250 ℃ on the described forming machine, and heat is dried by the fire 5～10min; 100～200 ℃ of described heat roller temperatures, hot pressing 3～5min; Described chill roll cools off 5～10min down for 20～50 ℃ at chilling temperature.
Preferably, described preheating oven is at 50～80 ℃ of following preheating 3～8min of temperature.
In a word, as long as in the scope that material allows, heat baking temperature/time, heat roller temperature/hot pressing time, chilling temperature/time, preheat temperature/time there is not strict restriction.
Compared with prior art, the invention has the advantages that: it not only has the various performances of general expanded PTFE coated filter material, the function that also possesses antibacterial sterilization, be particularly suitable for the filtering material of the air-conditioning of the more public place of various thalline such as hospital and ventilation filter, clean room filter device etc., use very convenient simple, production method technology advantages of simple is made easily.
The specific embodiment
Below in conjunction with embodiment the present invention is described in further detail.
Examples of implementation 1
Use the liquid bacteriostatic agent
(1) the antibacterial processing of base cloth: the liquid bacteriostatic agent is adopted methods such as padding method, infusion process, gunite, coating, brushing method, evenly spread upon on the base cloth by 2～15% of base cloth weight bacteriostatic agent, the Different Weight base cloth is in proportion with bacteriostatic agent, again through oven for drying.
(2) bonding agent preparation: under 25 ℃ of constant temperature, solubilizer stirs 5～10min with the speed of 500～1000rpm in bonding agent, is configured to the solution for standby of 10～20% (wt).
(3) complex method, can use gunite, coating or brushing method that the bonding agent that configures is coated in equably on the base cloth of antibacterial processing, be covered with eptfe membrane, then can be by drying by the fire 5～10min on 150～250 ℃ of forming machines, through 20～50 ℃ of chill roll cooling 5～10min, make expanded polytetrafluoroethylbacteriostatic bacteriostatic coated filter material again.Or, with the base cloth of antibacterial processing be covered with eptfe membrane through 100～200 ℃ of hot-rollings with 3～5min pressing, through 20～50 ℃ of chill rolls cooling 5～10min, make expanded polytetrafluoroethylbacteriostatic bacteriostatic coated filter material again.
Concrete enforcement prescription and condition see the following form
Examples of implementation 2
Use the powder bacteriostatic agent
(1) bonding agent preparation: under 25 ℃ of constant temperature, solubilizer stirs with the speed of 500～1000rpm, be configured to the solution of 10～20% (wt), progressively be added in the adhesive in 2～15% ratio of bonding agent weight the powder bacteriostatic agent, same speed with 500～1000rpm, evenly stir 5～10min, join to such an extent that antibacterial bonding agent is standby.
(2) complex method: with base cloth preheating 3～8min in 50～80 ℃ of preheating ovens, re-using the antibacterial bonding agent that gunite, coating or brushing method will configure is coated on the base cloth equably, be covered with poly tetrafluoroethylene, on 150～250 ℃ of forming machines, dry by the fire 5～10min respectively then, through 20～50 ℃ of chill roll cooling 5～10min, make expanded polytetrafluoroethylbacteriostatic bacteriostatic coated filter material again.Concrete prescription and implementation condition see the following form.
Among the present invention: base cloth refers to: each fibrid such as terylene, polypropylene fibre, sticking fine, cotton, hair and mixed textile thing thereof and nonwoven etc.Bonding agent refers to: bonding agents such as epoxy resin or polyurethane.Solvent refers to: butanone, acetone, ethyl acetate or their mixed solvent.
Expanded PTFE coated filter material after above-mentioned bacteriostatic agent is handled not only has the various performances of general expanded PTFE coated filter material, still can fold routinely and be made into filter, and the filter that makes also possesses the function of antibacterial sterilization.Antibacterial detection foundation and analytical method: JISZ 2801:2000, analyzing and testing result:
| Test microbes | Directly obtain bacterium number (cfu/ sheet) after the no processing sample sheet inoculation | No processing sample sheet inoculation back is placed 24h and is obtained viable count (cfu/ sheet) | Antibiotic coupons inoculation back is placed 24h and is obtained viable count (cfu/ sheet) | The antibacterial activity value | Bacteriostasis rate (%) |
| ETEC (Escherichia coli) ATCC 8739 | 4.3X10 5 | 2.6X10 7 | 5.1X10 5 | 1.7 | 98 |
Expanded polytetrafluoroethylbacteriostatic bacteriostatic coated filtering material is antibacterial long-lasting: make hydroxyl in antimicrobial component and the fabric fibre molecule, amino, carboxyl etc. contain the radical reaction of active hydrogen by coupling agent, thereby make antibiotic composition and fiber strong bonded, bacteriostasis rate can reach more than 90%.
Claims (10)
1. expanded polytetrafluoroethylbacteriostatic bacteriostatic coated filter material, it includes base cloth, eptfe membrane, base cloth is laminated with together mutually by adhesive linkage and eptfe membrane, it is characterized in that base cloth handles through bacteriostatic agent, bacteriostatic agent is spread upon on the base cloth by 2～15% (wt) of base cloth weight; Or the bonding agent in the adhesive linkage contains bacteriostatic agent, by 2～15% (wt) of bonding agent weight bacteriostatic agent is added in the bonding agent.
2. expanded polytetrafluoroethylbacteriostatic bacteriostatic coated filter material according to claim 1 is characterized in that described bacteriostatic agent adopts inorganic bacteriostatic agent, is divided into two kinds of liquid and powders.
3. expanded polytetrafluoroethylbacteriostatic bacteriostatic coated filter material according to claim 2 is characterized in that described bacteriostatic agent adopts silver oxide, cupric oxide, zinc oxide series or their composite compound preservatives.
4. expanded polytetrafluoroethylbacteriostatic bacteriostatic coated filter material according to claim 3 is characterized in that described base cloth selects all kinds of fiber cloth or the nonwoven of terylene, polypropylene fibre, sticking fine, cotton, hair and mixed textile thing thereof for use.
5. expanded polytetrafluoroethylbacteriostatic bacteriostatic coated filter material according to claim 4 is characterized in that described bonding agent is epoxy resin or polyurethane adhesive.
6. the production method of an expanded polytetrafluoroethylbacteriostatic bacteriostatic coated filter material is characterized in that steps in sequence is:
(1) the antibacterial processing of base cloth: the liquid bacteriostatic agent is adopted padding method, infusion process, gunite, coating or brushing method method, by 2～15% (wt) of base cloth weight bacteriostatic agent is evenly spread upon on the base cloth, then through oven for drying;
(2) bonding agent preparation: solubilizer in bonding agent through stirring, is configured to the solution for standby of 10～20% (wt);
(3) complex method: use gunite, coating or brushing method that the bonding agent that configures is coated in equably on the base cloth of antibacterial processing, be covered with eptfe membrane, heat baking on forming machine then through the chill roll cooling, makes expanded polytetrafluoroethylbacteriostatic bacteriostatic coated filter material again; Or, use gunite, coating or brushing method that the bonding agent that configures is coated in equably on the base cloth of antibacterial processing, be covered with eptfe membrane, then through hot-rolling hot pressing, through the chill roll cooling, make expanded polytetrafluoroethylbacteriostatic bacteriostatic coated filter material again.
7. according to the production method of claim 6, it is characterized in that heat baking temperature is under 150～250 ℃ on the described forming machine, heat is dried by the fire 5～10min; 100～200 ℃ of described heat roller temperatures, hot pressing 3～5 minutes; Described chill roll cools off 5～10min down for 20～50 ℃ at chilling temperature.
8. the production method of an expanded polytetrafluoroethylbacteriostatic bacteriostatic coated filter material is characterized in that steps in sequence is:
(1) bonding agent preparation: solubilizer in bonding agent, through stirring, be configured to the solution of 10～20% (wt), progressively be added in the adhesive in the ratio of 2～15% (wt) of bonding agent weight the powder bacteriostatic agent, same through stirring, join to such an extent that antibacterial bonding agent is standby.
(2) complex method: with base cloth preheating in preheating oven, re-using the antibacterial bonding agent that gunite, coating or brushing method will configure is coated on the base cloth equably, be covered with eptfe membrane, heat baking on forming machine then, through the chill roll cooling, make expanded polytetrafluoroethylbacteriostatic bacteriostatic coated filter material again.
9. production method according to Claim 8 is characterized in that heat baking temperature is under 150～250 ℃ on the described forming machine, and heat is dried by the fire 5～10min; Described chill roll cools off 5～10min down for 20～50 ℃ at chilling temperature.
10. according to the production method of claim 9, it is characterized in that described preheating oven is at 50～80 ℃ of following preheating 3～8min of temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710070727A CN101362035B (en) | 2007-08-08 | 2007-08-08 | Expanded polytetrafluoroethylene bacteriostatic coated filter material and production method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710070727A CN101362035B (en) | 2007-08-08 | 2007-08-08 | Expanded polytetrafluoroethylene bacteriostatic coated filter material and production method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101362035A true CN101362035A (en) | 2009-02-11 |
| CN101362035B CN101362035B (en) | 2010-05-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200710070727A Expired - Fee Related CN101362035B (en) | 2007-08-08 | 2007-08-08 | Expanded polytetrafluoroethylene bacteriostatic coated filter material and production method thereof |
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Cited By (9)
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| CN102068924A (en) * | 2010-12-22 | 2011-05-25 | 中国科学院长春应用化学研究所 | Polytetrafluoroethylene composite membrane and preparation method thereof |
| CN103571390A (en) * | 2013-10-24 | 2014-02-12 | 芜湖众力部件有限公司 | Antibacterial hot melt adhesive |
| CN104757719A (en) * | 2015-03-27 | 2015-07-08 | 陕西锦澜科技有限公司 | Anti-static skin fabric and preparation method thereof |
| CN104998559A (en) * | 2015-06-29 | 2015-10-28 | 苏州佑君环境科技有限公司 | Filtration sterilization membrane and preparation method thereof |
| CN105854414A (en) * | 2016-03-31 | 2016-08-17 | 上海市凌桥环保设备厂有限公司 | Composite filter material for air purifier and a preparation method thereof |
| CN109011921A (en) * | 2018-09-10 | 2018-12-18 | 杭州博大净化设备有限公司 | A kind of air filter high-efficiency air filtering film and preparation method thereof |
| CN110812948A (en) * | 2019-10-18 | 2020-02-21 | 东莞市亿茂滤材有限公司 | Multifunctional filtering material and preparation method thereof |
| CN111070825A (en) * | 2020-02-18 | 2020-04-28 | 湖州禾海材料科技有限公司 | Reusable polytetrafluoroethylene microporous film composite mask material, preparation method and mask prepared from same |
| CN113440951A (en) * | 2020-03-27 | 2021-09-28 | 中昊晨光化工研究院有限公司 | Polytetrafluoroethylene composite filtering material |
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| US6283308B1 (en) * | 1998-06-17 | 2001-09-04 | Microban Products Company | Bacteriostatic filter cartridge |
| CN2636893Y (en) * | 2003-04-25 | 2004-09-01 | 何雪山 | Ternary antibiotic mouthpiece |
| CN2642819Y (en) * | 2003-06-25 | 2004-09-22 | 中国人民解放军总后勤部军需装备研究所士兵***研究中心 | Repeatedly wearable protective clothing for anti-SARS with water vapor permeability |
| CN1315937C (en) * | 2003-06-25 | 2007-05-16 | 中国人民解放军总后勤部军需装备研究所 | Process for preparing moisture permeability anti-virus polytetrafluoroethylene composite film |
| CN1673272A (en) * | 2004-03-24 | 2005-09-28 | 上海新特纺织材料研究中心有限公司 | Hydrophilic porous PTFE film and its production process |
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| CN102068924A (en) * | 2010-12-22 | 2011-05-25 | 中国科学院长春应用化学研究所 | Polytetrafluoroethylene composite membrane and preparation method thereof |
| CN102068924B (en) * | 2010-12-22 | 2013-12-18 | 中国科学院长春应用化学研究所 | Polytetrafluoroethylene composite membrane and preparation method thereof |
| CN103571390A (en) * | 2013-10-24 | 2014-02-12 | 芜湖众力部件有限公司 | Antibacterial hot melt adhesive |
| CN104757719A (en) * | 2015-03-27 | 2015-07-08 | 陕西锦澜科技有限公司 | Anti-static skin fabric and preparation method thereof |
| CN104998559A (en) * | 2015-06-29 | 2015-10-28 | 苏州佑君环境科技有限公司 | Filtration sterilization membrane and preparation method thereof |
| CN105854414A (en) * | 2016-03-31 | 2016-08-17 | 上海市凌桥环保设备厂有限公司 | Composite filter material for air purifier and a preparation method thereof |
| CN109011921A (en) * | 2018-09-10 | 2018-12-18 | 杭州博大净化设备有限公司 | A kind of air filter high-efficiency air filtering film and preparation method thereof |
| CN109011921B (en) * | 2018-09-10 | 2021-01-15 | 杭州博大净化设备有限公司 | Efficient air filtering membrane for air filter and preparation method thereof |
| CN110812948A (en) * | 2019-10-18 | 2020-02-21 | 东莞市亿茂滤材有限公司 | Multifunctional filtering material and preparation method thereof |
| CN111070825A (en) * | 2020-02-18 | 2020-04-28 | 湖州禾海材料科技有限公司 | Reusable polytetrafluoroethylene microporous film composite mask material, preparation method and mask prepared from same |
| CN113440951A (en) * | 2020-03-27 | 2021-09-28 | 中昊晨光化工研究院有限公司 | Polytetrafluoroethylene composite filtering material |
| WO2021189762A1 (en) * | 2020-03-27 | 2021-09-30 | 中昊晨光化工研究院有限公司 | Polytetrafluoroethylene composite filter material |
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