CN111888840A - Efficient air filter medium and preparation method thereof - Google Patents
Efficient air filter medium and preparation method thereof Download PDFInfo
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- CN111888840A CN111888840A CN202010657491.2A CN202010657491A CN111888840A CN 111888840 A CN111888840 A CN 111888840A CN 202010657491 A CN202010657491 A CN 202010657491A CN 111888840 A CN111888840 A CN 111888840A
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- polypropylene
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0001—Making filtering elements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0027—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions
- B01D46/0028—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions provided with antibacterial or antifungal means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0027—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions
- B01D46/0036—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions by adsorption or absorption
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- Filtering Materials (AREA)
Abstract
The invention discloses a high-efficiency air filter medium and a preparation method thereof, which are characterized in that: consists of a substrate, and active carbon and an antibacterial agent which are bonded on the substrate through a bonding agent; wherein the substrate is a compatibilizer modified polypropylene-nylon composite melt-blown non-woven fabric substrate; the weight ratio of the adhesive to the activated carbon to the antibacterial agent is 1: (0.25-0.4): (0.06-0.1), loading on the substrate through a spraying process and a drying process, and bonding the activated carbon and the antibacterial agent on the melt-blown non-woven fabric substrate through an adhesive. The air filter medium material prepared by the method has the advantages of simple process, low cost and excellent performance, can effectively block particle pollutants and adsorb harmful substances in the air, can also remove bacteria and viruses in the air, and effectively improves the air cleanliness.
Description
Technical Field
The invention relates to a high-efficiency air filter medium and a preparation method thereof, belonging to the field of non-woven fabric materials and air filtration.
Background
Along with the development and progress of science and technology, the range of human activities is wider and wider, the living standard is higher and higher, people naturally have negative effects while obtaining positive effects in nature, the natural environment and the living environment of people are worsened, the indoor air quality problem becomes more prominent, and a large number of research results prove that the indoor air quality has a close relationship with the health of human bodies. Of these, particulate matter is the most prevalent of the atmospheric pollutants, most typically PM10 and PM2.5, and is not easily blocked. The particle size is small, the specific surface area is large, toxic and harmful substances in the air are easy to enrich, the particles can enter the body along with the breathing of people, diseases such as asthma and bronchitis can be directly caused, and the particles are one of main pollutants which damage the health of human bodies in urban atmospheric pollutants. On the other hand, when the interior is not properly cleaned, some corners that are not often concerned may develop some pathogenic microorganisms (e.g., bacteria and germs) in the case of high humidity and poor ventilation. If the clothes are not dried, the clothes are put in a clothes drying room, and the evaporated moisture can promote the growth of microorganisms when ventilation is poor. The bacteria and germs can be attached to particle pollutants in the air and float everywhere, which easily causes diseases to human bodies, and the spread range is wide, thereby forming a serious threat to the health of people. In order to improve the living environment level of people, the air purifier is produced. As the name suggests, the air purifier efficiently filters ambient air through the filter screen, can effectively remove pollutants in the air and ensure that the air becomes fresh and healthy.
With the increase of the requirements of people on living environment, the popularity of indoor air filters is increasing year by year, wherein, the filter screen is an important component of the air filter and is also one of the important indexes for judging the quality of the air filter. The filter screen of the air filter is generally glass fiber or melt-blown polypropylene nonwoven fabric. The filter screen can not remove indoor smoke and aldehyde and other gases emitted by decoration materials, and a functional air filter material is needed to eliminate the harm. Meanwhile, polypropylene has high strength, low density, good heat resistance and easy processing, but the polypropylene has low surface chemical energy, so that the compatibility of hydrophilicity, antistatic property and polar materials is poor, which limits the application of polypropylene. And the nylon has the advantages of higher strength, good wear resistance, fatigue resistance, shock resistance and the like. Therefore, the polypropylene/nylon composite non-woven fabric substrate can combine the advantages of the two materials and can better serve as a substrate of a functional air filtering material.
On the other hand, there are certain corners in the life that are not always concerned with frequently and may produce some pathogenic microorganisms (such as bacteria and germs). After entering the human body along with the circulation of air, the bacteria and germs can cause irreversible damage to parts of organs of the human body, thereby causing various diseases. Therefore, it has become a trend that the filter mesh of the air filter is loaded with the antibacterial agent and the adsorption-type substance.
Disclosure of Invention
The invention aims to provide a high-efficiency air filter medium and a preparation method thereof. On one hand, the filter medium combines the advantages of polypropylene fiber and nylon fiber, so that the rigidity, the fatigue resistance and the wear resistance of the prepared composite non-woven fabric substrate are greatly improved. On the other hand, the introduction of the active carbon and the antibacterial agent endows the filter screen with excellent characteristics of strong adsorption performance, strong odor removal capability, remarkable bacteriostatic and bactericidal effects and the like. The filter medium can meet the problem of effective air filtration in modern society.
In order to achieve the technical purpose, the technical scheme adopted by the invention is as follows:
a high efficiency air filtration media characterized by: consists of a substrate, and active carbon and an antibacterial agent which are bonded on the substrate through a bonding agent; wherein the substrate is a compatibilizer modified polypropylene-nylon composite melt-blown non-woven fabric substrate; the weight ratio of the adhesive to the activated carbon to the antibacterial agent is 1: (0.25-0.4): (0.06-0.1), the filter medium is loaded on the melt-blown non-woven fabric substrate through a spraying process and a drying process, the filter medium contains activated carbon and an antibacterial agent which have high mechanical strength, high adsorption speed and high purification degree, and the activated carbon and the antibacterial agent are bonded on the melt-blown non-woven fabric substrate through an adhesive.
Preferably, the compatibilizer modified polypropylene-nylon composite melt-blown nonwoven fabric substrate is prepared by mixing polypropylene, nylon and a compatibilizer in a weight ratio of 1: (0.15-0.4): (0.01-0.1) uniformly stirring the mixture in a double screw to form mixed master batches, and extruding the mixed master batches by a melt-blowing process to obtain the master batches.
Preferably, the polypropylene is homopolymerized polypropylene, and the melt index is 1200-1500g/10 min; the nylon is one of nylon 6 and nylon 66; the compatibilizer is a polymer chemical coupling agent, and the chemical coupling agent is polypropylene grafted maleic anhydride or polypropylene grafted hydroxymethyl acrylamide, so that the copolymer can chemically react with amino groups in nylon to form a graft copolymer. The graft copolymer has good compatibility with both polypropylene and nylon, thereby improving surface properties between two phases and enhancing interfacial adhesion to improve compatibility between the two.
Preferably, the activated carbon is powdered activated carbon; the powdered activated carbon powder has the advantages of large contact area, strong adsorption performance, strong odor removal capability, high filtering speed, low price and the like, so the powdered activated carbon powder is preferred as the activated carbon of a filter medium.
The adhesive is one of water-based acrylic emulsion adhesive or polyvinyl alcohol; the binder is the guarantee of the binding strength among the activated carbon, the antibacterial agent and the polypropylene-nylon composite melt-blown non-woven fabric substrate.
The antibacterial agent is an inorganic antibacterial agent, and further the inorganic antibacterial agent is one of nano silver, nano zinc oxide or nano copper oxide.
The invention also provides a method for preparing the high-efficiency air filter medium, which comprises the following specific steps:
a) preparing a base material: mixing raw materials of polypropylene, nylon and compatibilizer in proportion, uniformly stirring the mixture by a stirrer, feeding the mixture into a double screw to form mixed master batches, and extruding the mixed master batches by a melt-blowing process to obtain a polypropylene-nylon composite melt-blown non-woven fabric substrate;
b) spraying: mixing activated carbon, adhesive and antibacterial agent according to the weight ratio of 1: (0.25-0.4): (0.06-0.1), and uniformly stirring to prepare a spraying liquid; spraying the spraying liquid on the polypropylene-nylon composite melt-blown non-woven fabric substrate to obtain a spraying polypropylene-nylon non-woven fabric;
c) drying: and (3) drying the sprayed polypropylene-nylon non-woven fabric by two stages to obtain the polypropylene-nylon functional filter material.
Preferably, in the step a), the raw materials including polypropylene, nylon and a compatibilizer are mixed according to a weight ratio of 1: (0.15-0.4): (0.01-0.1) in the above-mentioned ratio.
Preferably, the amount sprayed in step b) is from 30 to 50g/m2The spraying pressure range is between 0.08 and 0.1 MPa.
Preferably, the two-stage drying process in the step c) comprises the following steps: firstly heating to 98-103 ℃ for 5-10 minutes, and then heating to 107-112 ℃ for 10-15 minutes.
The invention has the following beneficial effects and characteristics:
1. the high-efficiency air filter medium prepared by the invention has the advantages of high strength, good heat resistance, good wear resistance, good fatigue resistance, good shock resistance and the like, and is superior to the traditional air filter screen.
2. The active carbon in the high-efficiency air filter medium prepared by the invention has the advantages of large contact area, strong adsorption performance, strong odor removal capability, high filtering speed, low price and the like, and the application range of the air filter is widened.
3. The high-efficiency air filter medium prepared by the invention contains the antibacterial agent which can inhibit and sterilize bacteria, thereby providing better guarantee for the living environment of people.
4. The high-efficiency air filter medium prepared by the invention combines the activated carbon, the antibacterial agent and the air filter medium to ensure that the filtering efficiency exceeds that of a traditional air filter screen, the filtering efficiency grade is H13, and the filtering efficiency is 99.97% @0.5 mu m-99.99% @0.5 mu m.
Detailed Description
In order to enhance understanding of the present invention, the present invention will be described in further detail with reference to examples, which are provided for illustrating the present invention and are not limited to the examples.
Example 1
a) Preparing a base material: raw materials of polypropylene (the melt index is 1500g/10min), nylon 6 and polypropylene grafted maleic anhydride compatibilizer are mixed according to the weight ratio of 1: 0.3: stirring the mixture in a stirrer in a proportion of 0.02 uniformly at a twin-screw temperature of 210 ℃ to obtain mixed master batches, and carrying out melt-blowing process to obtain a polypropylene/nylon composite melt-blown non-woven fabric substrate;
b) spraying: mixing water-based acrylic emulsion adhesive, activated carbon and nano-silver antibacterial agent according to the weight ratio of 1: 0.4: 0.07, and stirring uniformly to prepare the spraying liquid. Spraying the spraying liquid on the polypropylene/nylon composite melt-blown non-woven fabric base material, wherein the spraying amount is 35g/m2Spraying pressure is 0.08MPa, and finally, the sprayed polypropylene/nylon non-woven fabric is obtained;
c) drying: and (3) drying the sprayed polypropylene/nylon non-woven fabric by two sections, and sequentially heating for 6 minutes at 100 ℃ and 10 minutes at 110 ℃ to obtain the polypropylene/nylon functional filter material.
And (3) testing results: the filtration grade of the filter medium reaches H13, and the filtration efficiency is 99.97% @0.5 μm.
Example 2
a) Preparing a base material: raw materials of polypropylene (with a melt index of 1450g/10min), nylon 6 and a polypropylene grafted hydroxymethyl acrylamide compatibilizer are mixed according to a weight ratio of 1: 0.4: stirring the mixture in a stirrer in a proportion of 0.06, feeding the mixture into a double screw at 215 ℃ to form mixed master batches, and carrying out melt-blowing process to obtain a polypropylene/nylon composite melt-blown non-woven fabric substrate;
b) spraying: polyvinyl alcohol adhesive, active carbon and nano zinc oxide antibacterial agent are mixed according to the weight ratio of 1: 0.32: 0.08, and uniformly stirring to prepare the spraying liquid. Spraying the spraying liquid on the polypropylene/nylon composite melt-blown non-woven fabric base material, wherein the spraying amount is 43g/m2Spraying pressure is 0.1MPa, and finally, the sprayed polypropylene/nylon non-woven fabric is obtained;
c) drying: and (3) drying the sprayed polypropylene/nylon non-woven fabric by two sections, and sequentially heating at 98 ℃ for 8 minutes and at 112 ℃ for 12 minutes to obtain the polypropylene/nylon functional filter material.
And (3) testing results: the filtration grade of the filter medium reaches H13, and the filtration efficiency is 99.99% @0.5 μm.
Example 3
a) Preparing a base material: raw materials of polypropylene (melt index 1300g/10min), nylon 66 and polypropylene grafted maleic anhydride compatibilizer are mixed according to the weight ratio of 1: 0.11: stirring the mixture evenly in a stirrer according to the proportion of 0.08, feeding the mixture into a double screw at 220 ℃ to form mixed master batches, and carrying out melt-blowing process to obtain a polypropylene/nylon composite melt-blown non-woven fabric substrate;
b) spraying: mixing water-based acrylic emulsion adhesive, activated carbon and nano copper oxide antibacterial agent according to the weight ratio of 1: 0.32: 0.1, and uniformly stirring to prepare the spraying liquid. Spraying the spraying liquid on the polypropylene/nylon composite melt-blown nonwoven fabricSpraying 50g/m on the base material of the woven cloth2Spraying pressure is 0.1MPa, and finally, the sprayed polypropylene/nylon non-woven fabric is obtained;
c) drying: and (3) drying the sprayed polypropylene/nylon non-woven fabric by two sections, and sequentially heating for 10 minutes at 102 ℃ and 15 minutes at 108 ℃ to obtain the polypropylene/nylon functional filter material.
And (3) testing results: the filtration grade of the filter medium reaches H13, and the filtration efficiency is 99.99% @0.5 μm.
The filter media prepared in the above examples all have 100% filtering efficiency (the dust source type is sodium chloride) for PM 2.5.
Claims (8)
1. A high efficiency air filtration media characterized by: consists of a substrate, and active carbon and an antibacterial agent which are bonded on the substrate through a bonding agent; wherein the substrate is a compatibilizer modified polypropylene-nylon composite melt-blown non-woven fabric substrate; the weight ratio of the adhesive to the activated carbon to the antibacterial agent is 1: (0.25-0.4): (0.06-0.1), loading on the melt-blown non-woven fabric substrate through a spraying process and a drying process, and bonding the activated carbon and the antibacterial agent on the melt-blown non-woven fabric substrate through an adhesive.
2. The efficient air filtering medium of claim 1, wherein the compatibilizer-modified polypropylene-nylon composite melt-blown nonwoven fabric substrate is prepared by mixing polypropylene, nylon and a compatibilizer in a weight ratio of 1: (0.15-0.4): (0.01-0.1) uniformly stirring the mixture in a double screw to form mixed master batches, and extruding the mixed master batches by a melt-blowing process to obtain the master batches.
3. The efficient air filtering medium as claimed in claim 2, wherein the polypropylene is homopolypropylene, and the melt index is 1200-; the nylon is one of nylon 6 and nylon 66; the compatibilizer is polypropylene grafted maleic anhydride or polypropylene grafted hydroxymethyl acrylamide.
4. A high efficiency air filtration medium as recited in claim 1, wherein said activated carbon is powdered activated carbon; the adhesive is one of water-based acrylic emulsion adhesive or polyvinyl alcohol; the antibacterial agent is one of nano silver, nano zinc oxide or nano copper oxide.
5. A method for preparing a high efficiency air filtration media of claim 1, comprising the steps of:
a) preparing a base material: mixing raw materials of polypropylene, nylon and compatibilizer in proportion, uniformly stirring the mixture by a stirrer, feeding the mixture into a double screw to form mixed master batches, and extruding the mixed master batches by a melt-blowing process to obtain a polypropylene-nylon composite melt-blown non-woven fabric substrate;
b) spraying: mixing activated carbon, adhesive and antibacterial agent according to the weight ratio of 1: (0.25-0.4): (0.06-0.1), and uniformly stirring to prepare a spraying liquid; spraying the spraying liquid on the polypropylene-nylon composite melt-blown non-woven fabric substrate to obtain a spraying polypropylene-nylon non-woven fabric;
c) drying: and (3) drying the sprayed polypropylene-nylon non-woven fabric by two stages to obtain the polypropylene-nylon functional filter material.
6. The method according to claim 5, wherein the raw polypropylene, the nylon and the compatibilizer in step a) are mixed in a weight ratio of 1: (0.15-0.4): (0.01-0.1) in the above-mentioned ratio.
7. The method as claimed in claim 5, wherein the amount sprayed in step b) is 30-50g/m2The spraying pressure range is between 0.08 and 0.1 MPa.
8. The method as claimed in claim 5, wherein the two-stage drying process in step c) is: firstly heating to 98-103 ℃ for 5-10 minutes, and then heating to 107-112 ℃ for 10-15 minutes.
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| CN202010657491.2A CN111888840A (en) | 2020-07-09 | 2020-07-09 | Efficient air filter medium and preparation method thereof |
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Citations (9)
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|---|---|---|---|---|
| CN102794052A (en) * | 2011-05-25 | 2012-11-28 | 东丽纤维研究所（中国）有限公司 | Air filtration material and application thereof |
| CN103788636A (en) * | 2014-02-20 | 2014-05-14 | 安安(中国)有限公司 | High polymer blending system for manufacturing high-fineness high-strength non-figured PA6 superfine fibers |
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| CN107715571A (en) * | 2017-09-30 | 2018-02-23 | 河南科航环保科技有限公司 | A kind of composite of antibacterial bacteriostatic, dust suction and Chalk-dust filtering and preparation method thereof |
| CN107841129A (en) * | 2017-10-25 | 2018-03-27 | 陕西聚洁瀚化工有限公司 | A kind of preparation method of blend of nylon |
| CN108301201A (en) * | 2018-02-05 | 2018-07-20 | 南通强生石墨烯科技有限公司 | The preparation method of graphene compound nonwoven cloth |
| CN108929537A (en) * | 2017-05-25 | 2018-12-04 | 合肥杰事杰新材料股份有限公司 | A kind of modification of nylon composition and preparation method thereof |
| CN109647052A (en) * | 2018-12-04 | 2019-04-19 | 山西绿建科技有限公司 | A kind of preparation method of antibacterial air conditioner filter element material |
-
2020
- 2020-07-09 CN CN202010657491.2A patent/CN111888840A/en active Pending
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