KR102197841B1 - Purification filter cartridge for masks containing a composite multi-layered nanofiber filter - Google Patents

Abstract

The present invention relates to a purification filter cartridge for a mask which has a filter structure of a complex multi-layered structure and thus maintains blocking performance even after repeated washing, and can be applied to all masks. The purification filter cartridge for a mask has two elastic fabrics on the outermost.

Description

Purification filter cartridge for masks containing a composite multi-layered nanofiber filter {PURIFICATION FILTER CARTRIDGE FOR MASKS CONTAINING A COMPOSITE MULTI-LAYERED NANOFIBER FILTER}

The present invention relates to a purification filter cartridge for a mask that has a filter structure of a complex multi-layer structure so that the blocking performance is still maintained even after repeated washing, and can be applied to all masks.

As the inflow of foreign air pollutants such as yellow dust and smog has recently increased, and the number of diesel vehicles that emit large amounts of nitrogen oxide, which is a precursor of fine dust since 2013, has increased rapidly, the generation of high-density fine dust has increased rapidly. As the situation in which it is urgent to establish intensive fine dust management and reduction measures, we are pushing for restrictions on the operation of old diesel vehicles in order to reduce the emission of automobiles, which are the main culprit of air pollution and fine dust in urban areas, but the generation of fine dust is still increasing.

Accordingly, in everyday life, masks are increasingly being worn to protect the respiratory tract from fine dust or yellow dust, but conventional fine dust blocking masks have a problem that is very susceptible to moisture because most of the electrostatic filter methods are used. Therefore, if moisture adheres to the mask due to breathing while wearing the mask, the ability to block fine dust rapidly decreases. In addition, there is a problem in that the static electricity disappears from the moment when moisture comes in contact with the electrostatic mask, and thus the fine dust filtering ability is significantly reduced.

On the other hand, as the importance of masks for personal hygiene and to prevent droplet transmission due to the novel coronavirus (COVID-19) crisis that swept the world from the end of 2019 to early 2020, the supply of masks temporarily became difficult. Increased interest in.

The conventional mask has a problem in that the structure of the filter formed in multiple layers is dense, causing inconvenience to the wearer's breathing, and the conventional filter is generally made of a synthetic resin material, so that it is not beneficial to Inje by itself. Furthermore, because the moisture generated in the breathing process increases bacterial growth in the filter, antibacterial agents are used to prevent this.As is well known, antibacterial agents are chemical substances that are not beneficial to the human body and, in severe cases, damage the health of the wearer, especially children and the elderly. There was a risk of harm.

In addition, the need for new masks is increasing as problems such as skin irritation, moisture-filled, unpleasant odor persists, etc., as the mask continues to be worn for a long time due to the fear of droplet infection. It is becoming.

Korean Utility Model Registration No. 20-0489651

An object of the present invention is to provide a purification filter cartridge for a mask comprising a nanofiber filter having a composite multilayer structure, wherein the purification filter cartridge for a mask has a composite multilayer structure, so that the blocking performance is still maintained even after repeated washing. To do.

Another object of the present invention is to provide a mask filter cartridge that enables smooth breathing and effectively filters foreign substances or bacteria including fine dust, and in particular, minimizes the use of chemical substances and suppresses the growth of bacteria.

One aspect of the present invention is a mask filter cartridge in which two stretch fabrics are located on the outermost side, and a nano filter structure is provided between the stretch fabrics, wherein the stretch fabrics are natural rubber, neoprene, butyl rubber ( butyl rubber), nitrile rubber, or a synthetic elastomer such as silicone rubber, and the nano-filter structure includes a nano dust net; And a nano filter; consisting of a continuous combination of the nano-vibration net; a nano-mesh; a nano-fiber coating layer coated by direct electrospinning on the; and the nano-fiber coating layer; Including the photocatalytic microparticles, the nano-filter; It provides a mask filter cartridge consisting of a three-layer structure in which a nanofiber layer is positioned between two outer skin layers.

Specifically, one side of the stretchable fabric may be in a form combined with a polymer compound fabric, and the polymer compound fabric may be one or more selected from the group consisting of polypropylene, polyethylene, and polyurethane, and preferably a polyurethane material. May be, but is not limited thereto.

In another aspect of the present invention, in the mask filter cartridge provided with at least one nano-filter structure and a membrane between the two stretch fabrics are located at the outermost, the stretch fabric; the stretch fabric is natural rubber, neoprene (neoprene ), butyl rubber, nitrile rubber, or a synthetic elastomer such as silicone rubber, and the nano filter structure includes a nano dust net; And a nano filter; consisting of a continuous combination of the nano-vibration net; a nano-mesh; a nano-fiber coating layer coated by direct electrospinning on the; and the nano-fiber coating layer; It includes photocatalytic microparticles, and the nanofilter; consists of a three-layer structure in which a nanofiber layer is positioned between two outer skin layers, and the membrane is an asymmetric porous membrane, silicone acrylate, polyethersulfone resin, poly It provides a mask filter cartridge prepared by mixing at least one of sulfone, polyaryl sulfone, and polyvinylpyrrolidone.

More specifically, the membrane may be coated with polytetrafluoroethylene (PTFE) on its surface.

Specifically, the nanofiber may be prepared by electrospinning a raw material containing PVDF (polyvinylidene fluoride), and more specifically, as a raw material, PVDF (polyvinylidene fluoride), PEO (polyethylene oxide) ) And PAN (Polyacrylonitrile) are dissolved in a solvent together to form a spinning solution; Forming nanofibers by electrospinning by applying a high voltage to the spinning solution; And a step of forming pores in which the surface of the resulting nanofiber is porous by selectively removing only PEO from the molded nanofiber, but is not limited thereto. More specifically, the weight ratio of the PVDF: PEO: PAN may be 8 to 20 parts by weight of PEO and 45 to 70 parts by weight of PEO, and most specifically, 12 parts by weight of PEO and PAN to 100 parts by weight of PVDF. It may be 70 parts by weight.

The nanofibers may undergo a process of forming pores on the surface of the nanofibers by removing PEO through a process of dissolving PEO using water at 50 to 70°C.

Specifically, the mask filter cartridge of the present invention exhibits excellent fine dust filtering ability and antibacterial activity (Table 1), which was confirmed to be maintained even after washing (Table 3), and further, breathability and comfort are also better than those of fine dust filters on the market. It was confirmed that it was remarkably excellent (Table 2).

Purification filter cartridge for a mask of the present invention has excellent breathability and blocking effect by including a nano filter composed of nano fibers, maintains excellent blocking performance even after repeated washing, and has features applicable to all masks, as well as mask Since it is possible to repeatedly use only the filter cartridge, it is characterized in that it solves the problems of environmental pollution and supply shortage that a disposable mask may cause.

In addition, the mask filter cartridge of the present invention has solved the problem of moisture and bacterial growth caused by wearing a mask by further including a membrane filter in addition to the nano filter, and exhibits effects on antibacterial and bad breath removal, making it inconvenient to wear a mask for a long time. It is characterized in that the minimized.

The effects of the present invention are not limited to the above effects, and should be understood to include all effects that can be deduced from the configuration of the invention described in the detailed description or claims of the present invention.

1 is a conceptual diagram showing the structure of a nanofilter structure according to an embodiment of the present invention.
2 is a conceptual diagram showing the structure of a purification filter cartridge for a mask manufactured according to an embodiment of the present invention.
3 is a conceptual diagram showing the structure of a purification filter cartridge for a mask equipped with a membrane manufactured according to an embodiment of the present invention.
4 is a photograph showing a state in which the elastic fabric and the polymer compound fabric present on the outermost surface of the purification filter cartridge manufactured according to an embodiment of the present invention are combined (A: after attaching the elastic fabric to the polymer compound fabric / View from the side after bonding the elastic fabric to the polymer compound fabric before sticking).
5 shows a test report confirming the fine dust blocking efficiency grade of a nanofiber layer mounted on a nano filter according to an embodiment of the present invention.
6 shows a test report confirming the fine dust blocking efficiency grade after PTFE coating on a membrane according to an embodiment of the present invention.

Hereinafter, the present invention will be described in detail by examples. However, the following examples are merely illustrative of the present invention, and the present invention is not limited by the following examples.

The mask filter cartridge of the present invention was simply manufactured in a form in which a nano-filter structure was provided between two elastic fabric layers on the outermost side.

Specifically, the stretchable fabric is woven using a synthetic elastomer such as natural rubber such as cross-linked polyisoprene, neoprene, butyl rubber, nitrile rubber or silicone rubber. It may be a fabric, and in one embodiment of the present invention, a neoprene fabric was used, but the present invention is not limited thereto.

When a mask is manufactured using the neoprene as a fabric, it can effectively block the path of droplet infection compared to commonly used cotton or nonwoven fabric, so that it can be effective in preventing droplet infection.

Specifically, the nano-filter structure may be configured in a form in which a nano dust net and a nano filter are continuously combined.

The nano-vibration net has a nanofiber coating layer coated by electrospinning directly on a nanomesh, and contains photocatalytic microparticles uniformly distributed in the nanofiber coating layer, and the nanomesh is, for example, , It may be configured in a form in which a plurality of nanowires having a line width of about 5 to 50 nm are formed on a substrate at intervals of about 5 to 100 nm.

In this case, the “line width” of the nanowire means the shortest distance among the straight line distances in the width direction connecting any two points on the surface of one nanowire in the width direction perpendicular to the length direction of one nanowire. The “diameter” of the nanomesh may mean the longest distance among linear distances connecting any two points on the surface of one nanomesh in a direction horizontal to the substrate. In addition, the term “interval (or pitch)” may mean the shortest linear distance among the distances between adjacent nanowires or nanomeshes.

The nanofiber coating layer is formed by electrospinning nanofibers directly on the nanomesh, and the nanofibers may be manufactured through the following process.

Specifically, the nanofiber is a mixing step of forming a spinning solution by dissolving polyvinylidene fluoride (PVDF), polyethylene oxide (PEO), and polyacrylonitrile (PAN) as raw materials together in a solvent; Forming nanofibers by electrospinning by applying a high voltage to the spinning solution; And a step of forming pores of selectively removing only PEO from the molded nanofibers to make the surface of the generated nanofibers porous.

Specifically, the weight ratio of PVDF: PEO: PAN may be 8 to 20 parts by weight of PEO, 45 to 70 parts by weight of PEO relative to 100 parts by weight of PVDF, and more specifically, 12 parts by weight of PEO, and 70 parts by weight of PAN to 100 parts by weight of PVDF. It can be wealth.

If the content of PEO is less than this range, pore formation due to removal in the spinning process is insufficient, and if a large amount of PEO is included, it is difficult to completely remove PEO and the physical properties of the nanofibers from which PEO has been removed are deteriorated. In addition, when the amount of PAN is less than the above content, it is difficult to meet the desired thickness due to the thickening of the nanofibers, and when the content exceeds the above content, the tensile strength and elongation rate decrease.

As a solvent for the raw material, EMC (ethyl methyl carbonate), NMP (N-methyl-2-pyrrolidone), DMA (dimethyl acetamide), DMF (N,N-dimethylformamide), DMSO (dimethyl sulfoxide), THF (tetra-hydrofuran) ), EC (ethylene carbonate), DEC (diethyl carbonate), DMC (dimethyl carbonate), PC (propylene carbonate), and one or more selected from the group consisting of acetone may be used. Specifically, it was confirmed that the highest yield was obtained when DMA and NMP were mixed in a ratio of 1:2.

The PVDF, PEO and PAN mixture was dissolved in a solvent at 85° C. in which DMA and NMP were mixed in a ratio of 1:2 to prepare a solution having a concentration of 20% (w/w), and water 2 to 2 based on 100 parts by weight of the solution 4 parts by weight were added and mixed. In the case of mixing with water, more pores may be formed due to the difference in vapor pressure and liquid-liquid phase separation.

The spinning solution was connected to a spinneret, a voltage of 70 kV was applied at 45° C., and discharged at 0.05 to 1 cc/g per hole to perform electrospinning to obtain nanofibers.

Thereafter, the pore-forming step of removing PEO to form pores was carried out through a process of dissolving PEO using water at 50-70° C. to finally obtain the porous nanofibers of the present invention.

That is, the nano-vibration net of the present invention is characterized in that the nano-fibers are directly spun onto the nano-mesh and coated, and the porous nano-fiber-coated layer can be obtained by passing through a process of dissolving PEO.

After the porous nanofibers are coated in this way, a photocatalyst is additionally sprayed, and the photocatalyst is titanium dioxide (TiO ₂ ) such as rutile and anatase, zinc oxide (ZnO), and zirconium dioxide. (ZrO _2), trioxide, tungsten (WO _3), perop Perovskite - type-metal composite oxide, such as by reacting with the light reacts with the oxygen of the photocatalytic surface superoxide anion (O ₂ ^-) to be produced of any kind as long as any of independent, In this example, 15% titanium dioxide was sprayed.

On the other hand, the nano filter constitutes a nano filter structure together with the nano dust net, and the nano filter has a three-layer structure in which a nano fiber layer is positioned between two outer skin layers made of various materials such as natural fiber, synthetic fiber, and non-woven fabric. I can.

Specifically, the outer skin layer is made of eco-friendly natural fibers, and may be made of a fabric manufactured using fibers obtained from cotton, hemp husk and coconut fruit husk. More specifically, the fiber is cooked by adding 10 to 20 parts by weight of purified water of cotton fiber, hemp husk and coconut fruit husk for 24 hours, followed by heating in water at 120° C. for 1 to 5 hours (蒸解) step, Lactobacillus salivarius ( Lactobacillus salivarius) 10 to 15 parts by weight and Micrococcus roseus ( Micrococcus roseus ) 5 to 10 parts by weight, pectin 3 parts by weight, fructo-oligosaccharide 3 parts by weight mixed at room temperature 2 It was used prepared by aging for 4 hours.

The nanofibers provided in the nanofilter structure have an average diameter of 50 to 1,000 nm, and form a nanofiber layer by crossing the nanofibers in an orthogonal or random form, and a fine layer between the nanofibers forming the nanofiber layer. Pore is formed, preventing bacteria or fine dust from passing through. The size of the pores formed in the nanofiber layer is preferably 0.05 μm to 0.1 μm in diameter. Specifically, the nanofiber layer of the present invention may be formed in a form in which each nanofiber is orthogonal to form pores of 0.05㎛ to 0.1㎛, and by maintaining this orthogonal shape, the existing fine dust filter depends on static electricity to remove dust. Unlike collecting, it has the effect of collecting dust due to its structural characteristics. If the size of the pores formed in the nanofiber layer is 0.1 μm or more in diameter, it is difficult to obtain a sufficient blocking effect against bacteria and fine dust, considering that the size of most bacteria or fine dust is 0.1 μm to 1.0 μm. In addition, if the size of the pores formed in the nanofiber layer is 0.05 μm or less in diameter, the wearer may feel uncomfortable breathing.

In addition, the nanofibers constituting the nanofiber layer may be prepared using PVDF as described above, and furthermore, chlorhexidine gluconate or polyhexamethylene biguanide, which is an antibacterial substance, is added to the PVDF. It may be additionally added.

An embodiment of the present invention provides a mask filter cartridge having a plurality of nano-filter structures and further including a membrane structure between the nano-filter structures.

The membrane may be any of a symmetrical or asymmetrical membrane, and to prepare the membrane, one or more of silicone acrylate, polyethersulfone resin, polysulfone, polyarylsulfone, and polyvinylpyrrolidone are mixed. Can, but is not limited thereto.

Specifically, in an embodiment of the present invention, the membrane is an asymmetric porous membrane, manufactured using a polyethersulfone resin, and is characterized in that contamination of the membrane is reduced by forming polydopamine in the inner pores of the membrane. More specifically, a dopamine solution having a concentration of 2 mg of dopamine per 1 ml of tris(hydroxymethyl)aminomethane (TRIS) aqueous buffer (pH 8 to 10) was prepared, and the solution was impregnated with a membrane for 1 to 3 hours. It may be one. In case of impregnation for less than 1 hour, sufficient polydopamine is not deposited in the inner pores, and in case of more than 3 hours, the efficiency decreases rapidly, resulting in a problem of lower profitability.

Example 1. Fabrication of a mask filter cartridge including a multi-layered nano filter

A mask filter cartridge including the multilayer structure nanofilter of the present invention was prepared. Specifically, a neoprene fabric was used for the outermost layer of the mask filter cartridge, and a nano-filter structure in which a nano-vibration net and a nano-filter were continuously bonded therebetween was manufactured in a structure in which a nano-filter structure was positioned. Briefly, this is neoprene fabric-[nano dust net]-[nano filter layer]-neoprene fabric structure, and to express this in more detail, neoprene fabric-[nanomesh-porous nanofiber coating layer (photocatalyst layer)]-[skin layer-nano fiber layer -Outer skin layer]- Can be represented by neoprene fabric.

In addition, in order to improve the durability and preserve the shape of the mask filter cartridge of the present invention, a polymer compound fabric layer may be further included between the neoprene fabric and the nano-vibration net, and the detailed configuration is as described above.

The internal structure of each layer is as described above.

Example 2. Fabrication of a mask filter cartridge having a composite multi-layer structure including a double nano filter and a membrane layer

A mask filter cartridge having a composite multilayer structure including a membrane layer between the dual nanofilters and the four nanofilters was prepared. Specifically, a neoprene fabric was used for the outermost layer of the mask filter cartridge, and a composite multilayer structure composed of {nano filter structure-membrane layer-nano filter structure} was placed therebetween. Briefly, this can be expressed by the structure of neoprene fabric-{[nano dust net]-[nano filter layer]-[membrane layer]-[nano dust net]-[nano filter layer]}-neoprene fabric.

In addition, the membrane surface may be coated with polytetrafluoroethylene (PTFE).

Experimental Example 1. Fine dust filtration, antibacterial effect and preference confirmation experiment

The masks manufactured using the mask filter cartridges of Examples 1 and 2, and two types of melt blown (MB) filters (KF80, KF94) and cotton masks for a commercially available mask were compared with Comparative Examples 1 to 3, respectively. As a result, a comparison of fine dust filtration effect, antibacterial and preference (breathability and comfort) was conducted.

The filterability of fine dust of the present invention was measured through an experiment using sodium chloride aerosol in accordance with the guidelines for the standard standard for health masks of the Ministry of Food and Drug Safety. Specifically, sodium chloride reagent is dissolved in water to make a 1% sodium chloride solution, and then sodium chloride aerosol is generated using an automatic filter inspection equipment, and the sodium chloride aerosol flow rate is 95 L per minute and the concentration is 8 ± 4 mg/㎥. After passing the aerosol at a flow rate of 95 L per minute, the concentration before and after passing was measured. The measured value at this time was an average value obtained between 30 ± 3 seconds, but was measured within 3 minutes after the start of the test.

In addition, antimicrobial properties were compared by KSK-0693. Specifically, 1 x 10 ⁷ Staphylococus aureus to be measured in the filters of Examples 1 and 2 and Comparative Examples 1 to 3 sterilized at 121°C in a high temperature and high pressure sterilizer (autoclave) Dogs were inoculated and cultured for 18 hours, and then the reduction rate of bacteriostatics was measured in% as compared to standard cotton cloth, and is shown in Table 1 below.

division Fine dust filtering ability (%) Antibacterial degree (%) Example 1 99 99 Example 2 99.5 99 Comparative Example 1 85 65 Comparative Example 2 98 70 Comparative Example 3 43 65

As a result, as shown in Table 1 above, when the mask filter cartridge of the present invention is used, it exhibits 99% or more filtration ability and meets KF94 criteria, and in the case of the mask filter cartridge (Example 2) composed of a complex multi-structure, more It was confirmed that it satisfies the KF94 standard by showing a high filtration capacity of 99.5%. In addition, it was confirmed that the antimicrobial degree was remarkably excellent in both Examples 1 and 2 than in Comparative Examples.

The test report of the nanofiber layer used in the present invention is shown in FIG. 5, and the test report of the PTFE-coated membrane is shown in FIG. 6.

In addition, as a sensory test in the case of using the mask filter cartridge of the present invention, subjective evaluation of air permeability and comfort was performed. In particular, when a mask is used for a long time, it can cause various unpleasant feelings to the user, such as cold moisture and odor, and such items are defined as comfortable, and the ability to maintain comfort according to wearing time was compared.

Specifically, 36 adults in their 20s to 60s were selected and a 10-point scoring method was used, and the higher the preference, the higher the score was given. The results are shown in Table 2 below.

Item Example 1 Example 2 Comparative Example 1 Comparative Example 2 Comparative Example 3 Breathable 9.3 9.1 8.2 7.2 9.9 Comfort (10 minutes) 8.9 9.5 8.8 8.0 9.9 Comfort (30 minutes) 8.3 8.8 7.3 6.9 8.5 Comfort (2 hours) 7.7 8.2 4.7 4.4 6.2

As shown in Table 2, it was confirmed that Comparative Examples 1 and 2 of the melt blown method received low preference in terms of breathability, and the comfort of the wearer rapidly decreased as the wearer wears for a long time, thereby causing discomfort. Comparative Example 3, which is a general cotton mask, was the most excellent in breathability and comfort immediately after wearing, but it was confirmed that when worn for a long time, the comfort value decreased exponentially due to dampness. On the other hand, it was confirmed that the mask filter cartridges of Examples 1 and 2 of the present invention not only exhibited better breathability than the melt blown filter, but also had significantly less discomfort due to long-term wearing. Particularly, Example 2 of the composite multilayer structure maintains remarkably excellent comfort even after 2 hours.This is because the humidity is controlled by the membrane existing between the two nano-filter layers and at the same time, the effect of removing bad breath due to the antibacterial effect is combined It seems to be due to the effect that worked.

Experimental Example 2. After washing, fine dust filtration and an experiment to confirm whether the antibacterial effect was maintained

For Examples 1 and 2, it was confirmed whether the fine dust filtering ability and antibacterial effect were maintained even after washing.

Washing was performed 1 to 10 times with water or ethanol, respectively, and after sufficiently drying after washing once, the filtering ability and antibacterial effect were confirmed in the same manner as in Experimental Example 1, and are shown in Table 3. .

Item 5 times washing with water
Filtration capacity (%) Water washing 10 times
Filtration capacity (%) Ethanol wash 5 times
Filtration capacity (%) Ethanol wash 10 times
Filtration capacity (%) Antibacterial effect Example 1 81 80 80 78 99% retention Example 2 92 86 90 81 99% retention

As a result, it was confirmed that the antibacterial effect was maintained at 99% in both Examples 1 and 2, and the filtration ability was still maintained at about 80% in both cases of washing with water and ethanol. The description is for illustrative purposes only, and those of ordinary skill in the art to which the present invention pertains will be able to understand that other specific forms can be easily modified without changing the technical spirit or essential features of the present invention. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not limiting. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as being distributed may also be implemented in a combined form.

The scope of the present invention is indicated by the claims to be described later, and all changes or modified forms derived from the meaning and scope of the claims and the concept of equivalents thereof should be construed as being included in the scope of the present invention.

Claims (5)

In the purification filter cartridge for a mask provided with at least one nano-filter structure between the two elastic fabrics are located at the outermost, the elastic fabric;
The stretchable fabric is a fabric woven using one or more raw materials selected from the group consisting of natural rubber, neoprene, butyl rubber, nitrile rubber, and silicone,
The nano filter structure may include a nano dust net; And a nano filter; is configured in a continuously combined form,
The nano-vibration net; is a nano-mesh formed in a form in which a plurality of nanowires having a line width of 5 to 50 nm are formed at intervals of 5 to 100 nm on a substrate; electrospinning nanofibers directly on one side of And a nanofiber coating layer coated by; and, including photocatalytic microparticles uniformly distributed and present in the nanofiber coating layer,
The nanofiber coating layer contains 100 parts by weight of PVDF (polyvinylidene fluoride), 12 parts by weight of PEO (polyethylene oxide), and 70 parts by weight of PAN (polyacrylonitrile) DMA (dimethyl acetamide) and NMP (N-methyl-2-pyrrolidone) 1:2 A mixing step of dissolving in a mixed solvent at a weight ratio of to form a spinning solution;
Forming nanofibers by electrospinning by applying a high voltage to the spinning solution; And
It is manufactured including a pore-forming step of porosizing the surface of the resulting nanofiber by selectively removing only PEO through a process of dissolving PEO using water at 50 to 70°C in the formed nanofiber,
The photocatalyst distributed in the nanofiber coating layer is sprayed with 15% titanium dioxide (TiO ₂ ),
The nano filter; is composed of a three-layer structure in which a nanofiber layer is positioned between two outer skin layers,
The outer layer is prepared using fibers obtained from eco-friendly natural fibers such as cotton, hemp husk and coconut fruit husk,
The nano-fiber layer included in the nano-filter is formed in a form in which pores of 0.05 μm to 0.1 μm are formed while each nano fiber is orthogonal,
The nano-fibers contained in the nano-filters are prepared by additionally adding gluconate chlorhexidine gluconate or polyhexamethylene biguanide, which are antimicrobial substances, to PVDF. The method of claim 1,
The purification filter cartridge for the mask is characterized in that it further comprises a membrane between the two elastic fabrics,
The membrane is an asymmetric porous membrane prepared by mixing at least one of silicone acrylate, polyethersulfone resin, polysulfone, polyarylsulfone, and polyvinylpyrrolidone, and the membrane is impregnated in a dopamine solution for 1 to 3 hours. It is manufactured to form polydopamine in the internal pores by, purifying filter cartridge for a mask. delete delete The method according to any one of claims 1 or 2,
The purification filter cartridge for a mask, characterized in that the filtering and antibacterial activity of fine dust is maintained even after washing.

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