WO2021210956A1 - Antiviral filter medium, and air filter unit and air conditioner including same - Google Patents

Abstract

Provided is an antiviral filter medium. The antiviral filter medium according to an embodiment of the present invention is implemented by including a first member formed of fibers having an antiviral component including a surfactant. Accordingly, the antiviral filter medium has very good air filtration efficiency through breathability provided with antiviral performance possessed, and furthermore, can be very suitable as filters in various kinds of air conditioners and media of various kinds of masks, because the deterioration of air filtration performance is prevented or minimized even when the use time is extended for a long time.

Description

Antiviral filter media, air filter unit and air conditioner including same

The present invention relates to a filter medium, and more particularly, to an antiviral filter medium.

Microbial and viral pathogens are a growing public health problem. Currently, the epidemic of novel viruses such as swine influenza and avian influenza is at risk. In particular, since some viruses are highly contagious and/or have a high mortality rate, not only patients exposed to the virus but also healthcare workers who treat patients are exposed to a significantly high risk of infection.

The spread of microorganisms or viruses, such as bacteria, is when contaminants such as droplets discharged from an infected person who have them contaminate the surface or the air of an object, and the microorganism or virus is re-entered into the human body through the body or clothing that has come into contact with the surface of the contaminated object. It may be achieved through transmission or by direct transmission of microorganisms or viruses through breathing in contaminated air.

In particular, air conditioners such as centralized air conditioners provided in vehicles such as buses and private cars, subways, trains, etc., and air purifiers arranged in various public buildings, etc. The lack of a function to filter or kill pathogenic microorganisms such as various bacteria and viruses contained therein is a threat to public health, such as fear of group infection.

Accordingly, there is a very high demand for a filter medium having antiviral performance that can filter and/or kill pathogenic microorganisms such as viruses in the air.

The present invention was devised in consideration of the above points, and as it has excellent antiviral performance, the virus is killed in the process of filtering the virus contained in the air, and the virus is killed on the filter medium even when the filter medium is contaminated with viruses Accordingly, an object of the present invention is to provide an antiviral filter medium that can solve the concern of virus infection caused by the filtered air.

In addition, the present invention provides an antiviral filter medium that can be widely used in filters for various air-conditioning devices as it has an excellent air filtration function while exhibiting anti-viral properties, and prevents deterioration of air filtration performance even when the use time is extended for a long time. It serves a different purpose to provide.

In order to solve the above problems, the present invention provides an antiviral filter medium including a first member formed of fibers having an antiviral component including a surfactant.

According to an embodiment of the present invention, the surfactant may be provided to be exposed on the fiber surface.

In addition, the antiviral component is provided on the fiber by immersing the first member in a coating solution containing the antiviral component, or the antiviral component is provided in the electrospinning solution for forming the first member and may be provided on the fiber.

In addition, the average diameter of the fibers forming the first member may be 0.05 to 1 μm, the basis weight may be 2 g/m 2 or less, and the average pore diameter may be 3 μm or less.

In addition, the surfactant may include any one or more of a cationic surfactant and an anionic surfactant.

In addition, the antiviral component is provided on the fiber by immersing the first member in a coating solution containing the antiviral component, and the surfactant in the coating solution may be provided at a concentration of 0.1 to 1% by weight. have.

In addition, the cationic surfactant may include cetyl trimethylammonium bromide, and the anionic surfactant may include sodium lauryl sulfate.

In addition, it may further include a porous second member disposed on one side of the first member and performing a supporting function.

In addition, the second member may include a heat-sealable fiber having a diameter of 30 to 50 μm, and a basis weight of 30 to 100 g/m 2 .

In addition, the heat-sealable fiber may be a core sheath-type composite fiber formed of a sheath including polyethylene and a core including polypropylene having a higher melting point than the sheath.

In addition, it may further include any one or more of a porous third member that is a woven, knitted, nonwoven, or mesh sheet formed of silver-containing fibers and a fourth member that is electrostatically treated melt blown nonwoven fabric.

In addition, the third member is formed through a ply-twisted yarn including a silver wire, and the ply-twisted yarn is formed from a core, a first covering yarn including a silver line surrounding the core, and the outside of the first covering yarn surrounding the core. It may include a second covering yarn surrounding.

In addition, the fourth member may include polypropylene fibers having a diameter of 1 to 10 μm, and a basis weight of 15 to 50 g/m 2 .

In addition, a porous second member performing a supporting function is further provided on one side of the first member, and the third member and the fourth member may be disposed in the order of the other side opposite to one side of the first member.

In addition, the present invention provides an air filter unit including the antiviral filter media according to the present invention bent so that mountains and valleys are alternately formed in one direction, and a filter frame surrounding the antiviral filter media.

In addition, the present invention provides an air conditioner comprising the antiviral filter medium according to the present invention.

The anti-viral filter media according to the present invention has very good air filtration efficiency through the breathability given while retaining the anti-viral performance, and furthermore, the deterioration of the air filtration performance is prevented or minimized even when the use time is extended for a long time. Therefore, it is very suitable as a filter medium for various types of air conditioners and masks. In addition, it can be used as fabrics for bedding, protective clothing, and medical clothes, as it is difficult for hospital microorganisms such as viruses to survive in the filter media.

1 is a cross-sectional schematic view of an antiviral filter medium according to an embodiment of the present invention;

2 is a SEM photograph of the surface of the first member included in the antiviral filter medium according to an embodiment of the present invention;

3a to 3c are SEM photos of the surface of the first member included in the antiviral filter media according to an embodiment of the present invention, Figure 3a is a SEM photo of the surface of the first member electrospun with PVDF, Figure 3b is PTFE A surface SEM photograph of the first member electrospun with, and FIG. 3C is a surface SEM photograph of the first member electrospun with polyether sulfone

4 is a surface SEM photograph of the fourth member of the melt blown contained in the antiviral filter medium according to an embodiment of the present invention;

5a is a schematic diagram showing an SEM photograph of a first member formed of nanofibers included in an antiviral filter medium according to an embodiment of the present invention and a pore diameter thereof;

Figure 5b is a schematic view showing the SEM photograph and these pore diameters of the first member formed of microfibers in contrast to Figure 5a;

6 is a schematic view showing the dust filtration mechanism of the electrostatically treated melt blown nonwoven fabric as a fourth member included in the antiviral filter media according to an embodiment of the present invention, and the electrostatically treated melt blown nonwoven fabric collected on the fiber surface. SEM picture showing dust,

7 is a graph showing a decrease in filtration efficiency according to usage time when an electrostatically treated melt blown nonwoven fabric is used alone as a fourth member included in the antiviral filter medium according to an embodiment of the present invention;

8 is an antiviral filter medium (fourth member (MB) + first member (PVDF nanoweb) + second member (CCL70)) according to an embodiment of the present invention and a filter medium according to a comparative example (fourth member) (MB) + second member (CCL70)) graph comparing the change in filtration efficiency with time,

9 is an SEM photograph of the contaminants collected on the fourth member included in the antiviral filter medium according to an embodiment of the present invention, and

10 and 11 are a perspective view and a cross-sectional schematic view of an air filter unit according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings, the embodiments of the present invention will be described in detail so that those of ordinary skill in the art to which the present invention pertains can easily implement them. The present invention may be embodied in many different forms and is not limited to the embodiments described herein.

1, the antiviral filter media 100 according to an embodiment of the present invention includes a porous first member 20 having antiviral properties, and a porous second member having a supporting function. (10), it may further include a porous third member 30 having antibacterial properties and a porous fourth member 40 electrostatically treated.

First, the first member 20 having an antiviral property will be described. The first member 20 is formed of fibers having an antiviral component, and has a porous structure. For example, the first member 20 may be a fibrous web formed of fibers having an antiviral component, and more specifically, may have a three-dimensional network structure formed of fibers.

The fiber 1 having the anti-viral component includes a known fiber-forming component 2 capable of forming fibers in addition to the anti-viral component 3, and preferably, the fiber-forming component 2 is formed on the fiber. It may be a known component that can be implemented in a shape, preferably a component capable of electrospinning. The fiber-forming component (2) may include at least one component selected from the group consisting of a fluorine-based compound, polyacrylonitrile (PAN), polyurethane, polyester, polyamide, and polyethersulfone (PES). The fluorine-based compound is, for example, polytetrafluoroethylene (PTFE)-based, tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer (PFA)-based, tetrafluoroethylene-hexafluoropropylene copolymer (FEP)-based, Tetrafluoroethylene-hexafluoropropylene-perfluoroalkyl vinyl ether copolymer (EPE), tetrafluoroethylene-ethylene copolymer (ETFE), polychlorotrifluoroethylene (PCTFE), chlorotrifluoro It may include any one or more selected from the group consisting of roethylene-ethylene copolymer (ECTFE)-based and polyvinylidene fluoride (PVDF)-based. Preferably, the fiber-forming component may include polyvinylidene fluoride (PVDF) in terms of low manufacturing cost, easy mass production of nanofibers through electrospinning, and excellent mechanical strength and chemical resistance. Alternatively, polyacrylonitrile (PAN) may be preferably used in consideration of the fiber-forming component having excellent wettability in a coating solution containing an antiviral component to be described later, and the adhesion between the surface of the fiber-forming component and the antiviral component. In particular, considering the interaction between the droplets and the fiber surface when the virus contained in the microscopic droplets derived from saliva passes through the filter media, the use of polyacrylonitrile fiber-forming ingredients can kill viruses more efficiently. there is an advantage

In addition, the antiviral component (3) can be used without limitation if it is a known viral component, but it essentially includes a surfactant, and specifically, various functional groups included in the surfactant combine with the virus to improve the antiviral performance. Surfactants capable of expressing may be used. As an example of this, the surfactant may be a cationic surfactant and/or an anionic surfactant. As the anionic surfactant, a known anionic surfactant may be used, but for example, a C8 to C22 alkyl sulfonate salt such as sodium lauryl sulfate, and/or alpha sulfo such as a linear alkyl benzene sulfonic acid Nated carboxylic acids or esters thereof and the like can be used. In addition, the cationic surfactant may be used without limitation in the case of a known cationic surfactant, for example, cetyl trimethylammonium bromide may be used. In the case of Sodium Lauryl Sulfate as an anionic surfactant or Cetyl trimethylammonium bromide as a cationic surfactant, excellent antiviral performance can be expressed even with a small concentration. It has the advantage of not impairing air permeability because it can be used.

On the other hand, the surfactant may be selected to improve the hydrophilicity of the first member 20 in addition to the function of expressing the antiviral performance, and in this case, it may be more useful when the material of the first member has hydrophobicity.

In addition, the antiviral component (3) containing the surfactant is preferably provided so as to be exposed to the surface of the fiber-forming component (2) of the fiber (1) as shown in Figure 1, specifically, the surface of the fiber (1) It may be provided to cover part or all of it, and through this, the degree of improvement in antiviral performance or hydrophilicity can be further improved.

In addition, the antiviral component (3) containing the surfactant is dipping the first member (20) in a coating solution containing the antiviral component (3) so that the antiviral component (3) is on the fiber (1) Or it may be provided on the fiber (1) by mixing the antiviral component (3) with the electrospinning solution for forming the first member (20) and then electrospinning it.

In addition, the fiber 1 may have an average diameter of 0.05 to 1 μm, in another example 0.1 to 0.4 μm. In addition, the basis weight of the first member 20 may be 2 g/m 2 or less, in another example 1 g/m 2 or less. In addition, the average pore diameter may be 3 μm or less, in another example, 0.5 to 2 μm, which may be more advantageous to achieve the object of the present invention.

On the other hand, when the antiviral component 3 is provided on the fiber 1 in the first member 20 through the coating solution, the coating solution contains the surfactant in the coating solution at a concentration of 0.1 to 1% by weight, more preferably may be contained in a concentration of 0.1 to 0.6% by weight. If the concentration is less than 0.1% by weight, the expression of antiviral properties may be weak. In addition, if the concentration exceeds 1% by weight, it is possible to reduce the air permeability of the first member. In addition, as will be described later, the antiviral filter media may be processed in a bent form a number of times as shown in FIG. 10 , and there is a fear that antiviral properties may be deteriorated due to large detachment of the antiviral component 3 during the processing process.

The coating solution may further include a solvent in addition to the antiviral component. The solvent may be a known solvent capable of dispersing or dissolving the antiviral component without physically or chemically invading the fiber-forming component. The solvent may be, for example, water and/or an organic solvent.

The first member 20 described above may further include a porous second member 10 performing a supporting function on one surface.

The second member 10 is not particularly limited if it is a porous member that normally serves as a support, but may preferably be a woven fabric, a knitted fabric or a non-woven fabric in its shape. For example, in the case of a nonwoven fabric, a known nonwoven fabric such as a chemical bonding nonwoven fabric, a thermal bonding nonwoven fabric, a dry nonwoven fabric such as an airlay nonwoven fabric, a wet nonwoven fabric, a spanless nonwoven fabric, a needle punching nonwoven fabric, or a melt blown nonwoven fabric may be used, for example, the second member (10) may be a thermal bonding nonwoven fabric.

In addition, the pore diameter, porosity, basis weight, etc. of the second member 10 may vary in consideration of the desired strength, filtration efficiency, etc., so the present invention is not particularly limited thereto. However, in order to more easily achieve the object of the present invention, a nonwoven fabric having a diameter of 30 to 50 μm and a basis weight of 30 to 150 g/m 2 and an average pore diameter of 30 to 100 μm may be used.

In addition, the second member 10 is not limited in its material. As a non-limiting example, it may include a synthetic fiber preferably selected from the group consisting of polyester, polypropylene, nylon and polyethylene. However, the second member 10 may include heat-sealable fibers to enable attachment to the first member 20 without a separate adhesive. The heat-sealable fiber may be a low-melting-point polyester or low-melting polyolefin-based material, and may preferably include a low-melting polyolefin-based component, and more specifically, a sheath comprising polyethylene and a poly(polyethylene) having a higher melting point than the sheath. It may be a core-sheath type composite fiber formed with a core including propylene. The first member 20 may include fibers 1 having a diameter of 1 μm or less. When joined, it exhibits superior bonding properties compared to the case of using the second member formed of polyester fibers, and has excellent flexibility compared to the second member formed of polyester fibers with strong brittle characteristics. It can better respond to the external force applied while passing through, and thus it can be advantageous to prevent separation at the junction interface.

In addition, the antiviral filter media 100 may further include a third member 30 that exhibits antibacterial properties. The third member 30 may be used without limitation in the case of a porous member containing a known component exhibiting antibacterial properties. Preferably, the third member 30 may include silver-containing fibers exhibiting antibacterial properties.

The silver-containing fiber is a silver wire made of silver alone, a metal wire containing other metals such as copper in addition to silver, or a silver wire and/or a silver-containing metal wire braided with a conventional non-metal fiber. can be a speaker. When describing the metal wire containing other metals, such as copper, it may be linearly formed by mixing a metal other than silver in a non-solid state with silver, that is, in a non-solid state, ie, silver and non-alloy state. When a metal other than silver is mixed with silver in a non-solid state, the silver and the other metal may be arranged such that silver and other metal occupy a predetermined area regularly or irregularly in a single linear region, For example, it may have a double structure in which a layer is formed by enclosing silver on the outside of the copper wire. In this case, the copper wire may impart excellent flexibility to the silver wire, and the surrounding silver may have an average thickness of 3 to 3200 nm, and preferably, an average thickness of 5 to 3000 nm. If the average thickness of the surrounding silver is less than 3 nm, it is easy to manufacture so that copper, which is the central metal, is exposed to the outside, so that the antibacterial function may be lowered. There is a risk of being inhaled into the human respiratory tract or remaining on the skin. In addition, when the average thickness of the surrounding silver exceeds 3200 nm, the flexibility of the silver wire may be reduced. The double structure of the silver wire is a step of drawing a copper material to a predetermined diameter, integrating the copper material drawn by a cladding process and a silver plate to form a double structure in which the silver plate surrounds the outside of the copper material. It may be formed including the steps of obtaining a wire and obtaining a silver wire through wire drawing of the double-structured wire. Alternatively, the silver wire may be obtained by processing a solution containing a liquid Ag powder solution on the drawn copper material to coat Ag with a uniform thickness on the surface of the copper material, and then performing wire drawing to obtain the silver wire. Alternatively, silver wire may be obtained by plating silver on the drawn copper material and subjecting it to wire drawing.

Next, a description will be given of the form of a thread formed by braiding a silver wire with a non-metallic conventional fiber. The silver wire and the conventional fiber are a known manufacturing method in the field of textiles in which two kinds of fibers are braided, and the known two kinds of fibers. It may be a ply-twisted yarn implemented by appropriately adopting an arrangement structure. In this case, the silver wire used may be a wire made of only silver or a metal wire containing silver and other metals. For example, the ply-twisted yarn is a yarn having a triple structural cross section including a core yarn, a first covering yarn including a silver line surrounding the core, and a second covering yarn surrounding the outside of the first covering yarn surrounding the core yarn can

The core and second covering yarns may be used without limitation as long as they are fibers that can be used to improve the flexibility and elasticity of the ply-twisted yarn, and preferably, any one or more selected from natural fibers and synthetic fibers may be used, and more preferably poly Ester-based fibers may be used. In addition, the core yarn and the second covering yarn may be formed of a mono yarn or a plurality of filament yarns, and preferably a fiber formed of a plurality of filament yarns. In addition, the screening and second covering yarns may be used without limitation as long as they are fibers of fineness commonly used in the art, and preferably each independently may have a fineness of 20 to 100De' (denier), more preferably The fineness may be 30 ~ 75De'. If the fineness of the screening and the second covering yarn is independently less than 20De', the antibacterial performance and durability according to the single yarn of the silver wire may be reduced. and, thereby, there is a risk of interfacial separation.

In addition, the second covering yarn may be twisted at a twist number of 350 to 1100 TPM, preferably twisted at 450 to 1000 TPM, and may be included in the ply-twisted yarn. If the number of twists of the second covering yarn is less than 350 TPM, the durability and antibacterial performance according to the single yarn of the silver wire may be deteriorated. In addition, when the number of twists exceeds 1100 TPM, elasticity and flexibility may be reduced, and as the area of the silver wire exposed to the surface decreases, the antibacterial performance may be relatively reduced.

On the other hand, the third member 30 is a member implemented to have a porous structure including the above-mentioned silver wire made of silver, silver-containing metal wire and/or ply-twisted yarn, and specific examples thereof include fabric, knitted fabric, nonwoven fabric Or it may be a mesh sheet. In this case, the woven fabric, knitted fabric, nonwoven fabric or mesh sheet may further include natural fiber and/or synthetic fiber that does not contain a silver wire.

Next, the porous fourth member 40 will be described. The fourth member 40 may be disposed on one side of the above-described first member 20 to perform a function of protecting the first member 20 . In addition, when the third member 30 is further included, a function of protecting one side of the third member 30 may be performed.

The fourth member 40 may be a member through which external air to be filtered first passes, and thus may perform a function of improving filtration performance for fine particles in the air. To this end, the fourth member 40 may be a porous member performing a function of filtering fine dust, dust, etc. contained in the air using electrostatic force. The fourth member 40 may be, for example, a known nonwoven fabric, and preferably may be an electrostatically treated melt blown nonwoven fabric. The electrostatic treatment can be performed on the entire porous member, but it is revealed that only a part of it can be treated, and a detailed description thereof will be omitted because a known method used in the manufacture of a conventional electrostatic treatment filter can be appropriately employed. do.

In addition, the diameter and basis weight of the fibers contained in the fourth member 40 can be appropriately adjusted according to the purpose. In order to guarantee improved filtration performance and durability, the fourth member 40 has a diameter of 1 to 10 μm. Phosphorus fibers are included, and the basis weight may be 15 to 50 g/m 2 , and in another example, the basis weight may be 20 to 35 g/m 2 . In addition, the average pore diameter may be less than 20㎛, another example may be 10㎛. If the average pore diameter of the fourth member 40 is excessively small, air permeability may decrease and pressure loss may increase, and if the average pore diameter is excessively large, filtration efficiency may decrease. In addition, when the average diameter of the fibers forming the fourth member 40 is excessively small, air permeability may be reduced, pressure loss may increase, and if the average diameter of the fibers is excessively large, filtration efficiency may be reduced. In addition, if the basis weight of the fourth member 40 is excessively low, the filtration efficiency may be reduced as the deviation increases, or uniform filtration efficiency may not be expressed. can

In addition, the fibers forming the fourth member 40 may include a synthetic polymer component selected from the group consisting of polyester, polyurethane, polyolefin, and polyamide; Or it may include a natural polymer component including a cellulose-based, for example, may include polypropylene.

On the other hand, in the case of the antiviral filter medium in which the fourth member 40 and the first member 20 are combined, it exhibits a synergistic action in terms of durability of filtration performance together with the first member 20 . Specifically, the above-described first member 20 may have a three-dimensional network structure by accumulating fibers of 1 μm or less. In this case, the first member 20 may be designed to have a pore size capable of physically filtering fine dust of PM2.5 or less, and a flow path may be formed to prevent a decrease in the flow rate of air passing therethrough. In this case, the first member 20 may function to compensate for the problem of a reduction in collection efficiency due to static electricity that may occur in the electrostatically treated fourth member 40 and to maintain the initially designed filtration efficiency for a long time.

6 to 8, the electrostatically treated fourth member 40 adsorbs dust to the fiber surface using electrostatic force, and as time elapses, the electrostatic force decreases. It is lowered to less than 50% of the initially designed efficiency, but there is a problem that the replacement cycle is very short. However, as shown in FIG. 8, when the first member 20 is used together with the electrostatically treated fourth member 40, when only the fourth member 40 is used, the collection efficiency continues to decrease, whereas the collection efficiency decreases. Although not shown in the graph, there is an advantage that the collection efficiency can be maintained at more than 95% of the initially designed value even if it continues for several months.

In addition, the above-described anti-viral filter media 100 may be bent to have a plurality of mountains and valleys alternately arranged in one direction as shown in FIGS. 10 and 11 to implement the air filter unit 200 . In addition, the air filter unit 200 is arranged to surround at least one side, preferably four sides, of the bent antiviral filter medium 210 to support the antiviral filter medium 210 and change the shape of the air filter unit. It may further include a filter frame 220 for maintaining.

In addition, the antiviral filter media 100 or the air filter unit 200 described above may be used to replace the air filter provided in various known air conditioners. The air conditioner may be a vehicle such as a bus or private vehicle, a transportation means such as a subway or a train, an air conditioner provided in various public buildings, or an air purifier disposed in various indoor spaces, and the air conditioner has an antiviral function As the filter media is provided, it is possible to filter or kill pathogenic microorganisms such as various bacteria or viruses included in the air introduced from the outside or circulated in the room.

The present invention will be described in more detail through the following examples, but the following examples are not intended to limit the scope of the present invention, which should be construed to aid understanding of the present invention.

<Example 1>

Polyacrylonitrile (PAN) on one side of the second member, which is a nonwoven fabric (Namyang Nonwoven Co., Ltd., CCP30) formed of a core-sheath composite fiber having a thickness of about 20 μm and a melting point of about 120°C as a sheath and polypropylene as a core. ) after electrospinning a spinning solution containing a fiber-forming component, heat and 1 kgf/cm 2 pressure at a temperature of 140° C. A filter media was prepared. At this time, the PAN nanofiber web had an average diameter of fibers of 0.2 μm, a basis weight of 20 g/m 2 , and an average pore diameter of 1 μm.

After immersing the prepared filter media in an antiviral coating solution, which is an aqueous solution in which an anionic surfactant, sodium lauryl sulfate, is dissolved at a concentration of 0.1% by weight, take it out and pass it through calendering to remove the excess coating solution and then at a temperature of 70°C. and dried to prepare antiviral filter media as shown in Table 1 below.

<Examples 2 to 6>

It was prepared in the same manner as in Example 1, except that the type and/or concentration of the surfactant was changed as shown in Table 1 below to prepare antiviral filter media as shown in Table 1 below.

<Comparative Example 1>

It was prepared in the same manner as in Example 1, but the antiviral coating solution was not treated, and the prepared filter media was used.

<Experimental example>

The following physical properties were evaluated for the filter media according to Examples and Comparative Example 1, and the results are shown in Table 1 below.

1. Antiviral Performance A

The specimen was prepared to be 4 cm wide and 4 cm long. After that, 200 μl of PED virus (coronaviridae, Enveloped RNA virus) was treated on each specimen, and after standing at 23° C. for 14 hours, 1X DMEM (0.3% Tryptose Phosphate Broth, 0.02% Yeast Extract, 1% antibiotic-antimycotic, 5ug/ml trypsin), 800 μl of an inoculation medium was added to recover the virus located on the specimen.

After 10 dilutions of the inoculation medium containing the recovered virus, 100 μl of each dilution factor was inoculated into 5 wells. After _{adsorption in a CO 2} incubator for 1 hour, the inoculum was removed, and the virus culture medium was then incubated with 2× VERO cells. 200 μl per well was dispensed in a 96-well plate containing 10 ^{4 pieces/well and cultured in an incubator for 5 days.} Thereafter, the CPE of the cells was checked and the TCID value was calculated, and the results are shown in Table 1 below.

The virus titer had a TCID value of 5.0000, and the positive control group was evaluated by treating only the virus stock solution at 200 μl 23° C. for 14 hours and then treating the inoculation medium in the same way, and the TCID value was 5.0000.

2. Antiviral performance B

The specimen was prepared to be 4 cm wide and 4 cm long. After the prepared specimen was placed on a 1.5ml tube, 200 μl of each PED virus was treated on the specimen and centrifuged at 23°C. After centrifugation, 800 μl of inoculation medium containing 1X DMEM (0.3% Tryptose Phosphate Broth, 0.02% Yeast Extract, 1% antibiotic-antimycotic, 5ug/ml trypsin) was added to the virus obtained by centrifugation, followed by decimal dilution and antiviral performance In the same manner as in evaluation A, the CPE of the cells was checked and the TCID value was calculated, and the results are shown in Table 1 below. The virus titer used at this time had a TCID value of 5.0000.

3. Air permeability

The air permeability was measured under the same conditions by installing a filter medium in an air permeability tester (TEXTEST). With respect to the measured results, the air permeability of the other examples was expressed as a relative percentage based on the air permeability of Comparative Example 1 as 100%. The closer the percentage is to 0, the greater the fluctuation in air permeability.

	Example 1	Example 2	Example 3	Example 4	Example 5	Example 6	Comparative Example 1
Surfactant (type/concentration (wt%)	A/0.1	B/0.1	A/0.3 + B/0.3	A/0.08	A/0.98	A/1.2	unprocessed
Antiviral performanceATCID50 (log 10 )	0.563	0.581	0.896	1.551	0.432	0.425	4.990
Antiviral performanceBTCID50 (log 10 )	3.500	3.558	4.000	4.840	3.225	3.220	5.000
air permeability	95.6	95.5	90.3	98.5	85.0	53.3	100

In Table 1, A is an anionic surfactant that is sodium lauryl sulfate, and B is a cationic surfactant that is cetyl trimethylamonium bromide.

As can be seen from Table 1,

As a result of antiviral performance A, it can be confirmed that Examples 1, 2, 4, and 5 have virus removal performance of 99.0% or more. In addition, as a result of antiviral performance B, it can be seen that Examples 1, 2, 4, and 5 had a virus removal performance of 90.0% or more.

On the other hand, in the case of Example 6 in which the concentration of the surfactant is excessive, it can be seen that the air permeability is severely inhibited.

Although one embodiment of the present invention has been described above, the spirit of the present invention is not limited to the embodiments presented herein, and those skilled in the art who understand the spirit of the present invention can add components within the scope of the same spirit. , changes, deletions, additions, etc. may easily suggest other embodiments, but this will also fall within the scope of the present invention.

Claims (16)

1. An antiviral filter medium comprising a; a first member formed of fibers having an antiviral component including a surfactant.
2. According to claim 1,

   The surfactant is an antiviral filter media provided to be exposed on the fiber surface.
3. According to claim 1,

   The antiviral component is treated with a coating solution containing an antiviral component on the first member so that the antiviral component is provided on the fiber, or

   An antiviral filter medium provided on a fiber with an antiviral component in the electrospinning solution for forming the first member.
4. According to claim 1,

   The average diameter of the fibers forming the first member is 0.05 ~ 1㎛, the basis weight is 2g / m2 or less, the average pore diameter is 3㎛ or less antiviral filter media.
5. According to claim 1,

   The surfactant is an antiviral filter medium comprising at least one of a cationic surfactant and an anionic surfactant.
6. According to claim 1,

   The antiviral component is a coating solution containing an antiviral component is treated on the first member, the antiviral component is provided on the fiber,

   The antiviral filter media, characterized in that the surfactant in the coating solution is provided at a concentration of 0.1 to 1% by weight.
7. 6. The method of claim 5,

   The cationic surfactant includes cetyl trimethylammonium bromide, and the anionic surfactant includes sodium lauryl sulfate.
8. According to claim 1,

   The antiviral filter media further comprising a porous second member disposed on one side of the first member and performing a supporting function.
9. 9. The method of claim 8,

   The second member includes a heat-sealable fiber having a diameter of 30 to 50 μm, and an antiviral filter medium having a basis weight of 30 to 100 g/m 2 .
10. 10. The method of claim 9,

    The heat-sealable fiber is an antiviral filter media that is a core-sheath type composite fiber formed of a sheath comprising polyethylene and a core comprising polypropylene having a higher melting point than the sheath.
11. According to claim 1,

    Antiviral filter media further comprising any one or more of a porous third member that is a woven, knitted, nonwoven, or mesh sheet formed of silver-containing fibers and a fourth member that is electrostatically treated melt blown nonwoven fabric.
12. 12. The method of claim 11,

    The third member is formed of a ply-twisted yarn including a silver wire, and the ply-twisted yarn includes a core, a first covering yarn including a silver line surrounding the core, and the outside of the first covering yarn surrounding the core. Antiviral filter media comprising a second covering yarn.
13. 12. The method of claim 11,

    The fourth member includes polypropylene fibers having a diameter of 1 to 10 μm, and an antiviral filter medium having a basis weight of 15 to 50 g/m 2 .
14. 12. The method of claim 11,

    A porous second member performing a supporting function is further provided on one side of the first member,

    An antiviral filter medium disposed in order of a third member and a fourth member on the other side opposite to one side of the first member.
15. The antiviral filter media according to any one of claims 1 to 14, which is bent so that mountains and valleys are alternately formed in one direction; and

    An air filter unit comprising a; a filter frame surrounding the antiviral filter medium.
16. An air conditioner comprising an antiviral filter medium according to any one of claims 1 to 14.

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