KR102587194B1 - Anti-viral filter media, air filter unit and air conditioning apparatus comprising the same - Google Patents

Abstract

Antiviral filter media is provided. An antiviral filter medium according to an embodiment of the present invention is implemented by including a first member formed of fibers containing an antiviral component including a surfactant. According to this, in addition to possessing antiviral performance, it has very excellent air filtration efficiency through the provided breathability, and furthermore, even when the use time is extended for a long time, the deterioration of air filtration performance is prevented or minimized, so it can be used in filters of various air conditioning devices. , It is very suitable as a filter medium for various types of masks.

Description

Antiviral filter media, air filter unit and air conditioning apparatus comprising the same}

The present invention relates to filter media, and more specifically to anti-viral filter media.

Microbial and viral pathogens are a growing public health problem. Currently, the spread of new viruses such as swine influenza or avian influenza is a threat. In particular, because some viruses are highly contagious and/or have a high mortality rate, not only patients exposed to the virus but also medical workers responsible for treating patients are exposed to a significantly high risk of infection.

The spread of microorganisms such as bacteria or viruses occurs when contaminants such as droplets released from an infected person carrying them contaminate the surface of an object or the air, and the microorganisms or viruses are re-introduced into the human body through the body or clothing that touches the surface of the contaminated object. It can be transmitted through transmission or by direct transmission of microorganisms or viruses through breathing in polluted air.

In particular, air conditioning devices such as central air conditioning units installed in vehicles such as buses and private cars, transportation vehicles such as subways and trains, various public buildings, etc., and air purifiers placed indoors are used in air circulating outside or indoors. Public health is being further threatened due to the lack of a function to filter or kill pathogenic microorganisms such as various bacteria and viruses contained therein, raising the risk of mass infection.

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

Publication of Patent No. 2002-0028091

The present invention was developed in consideration of the above points. As it has excellent antiviral performance, viruses contained in the air are killed in the process of being filtered, and even if the filter medium is contaminated with viruses, the viruses are killed on the filter medium. As a result, the purpose is to provide an antiviral filter medium that can eliminate concerns about viral infection due to filtered air.

In addition, the present invention provides an antiviral filter medium that has excellent air filtration function while exhibiting antiviral properties, and prevents deterioration of air filtration performance even when the usage time is extended for a long time, so that it can be widely used in filters for various air conditioning devices. There is another purpose in providing it.

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

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

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

In addition, the average diameter of the fibers forming the first member may be 0.05 to 1㎛, the basis weight may be 2g/m2 or less, and the average pore diameter may be 3㎛ or less.

Additionally, the surfactant may include at least one 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 an antiviral component, and the surfactant in the coating solution may be provided at a concentration of 0.1 to 1% by weight. there is.

Additionally, 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 support function.

Additionally, the second member includes heat-sealable fibers with a diameter of 30 to 50 ㎛, and may have a basis weight of 30 to 100 g/m2.

In addition, the heat-sealable fiber may be a core-sheath type composite fiber formed of a sheath provided with polyethylene and a core portion provided with polypropylene, which has a higher melting point than the sheath.

In addition, it may further include at least one of a porous third member that is a fabric, knitted fabric, nonwoven fabric, or mesh sheet formed of fibers containing silver, and a fourth member that is an electrostatically treated meltblown nonwoven fabric.

In addition, the third member is formed through a plied yarn including a silver line, and the plied yarn includes a core, a first covering yarn including a silver line surrounding the core, and an outside of the first covering yarn surrounding the core. It may include a surrounding second covering yarn.

Additionally, the fourth member includes polypropylene fibers with a diameter of 1 to 10 ㎛, and may have a basis weight of 15 to 50 g/m2.

In addition, a porous second member that performs a support function may be further provided on one side of the first member, and a third member and a fourth member may be arranged in that order on the other side opposite to one side of the first member.

Additionally, the present invention provides an air filter unit including an antiviral filter medium according to the present invention bent to alternately form peaks and valleys in one direction, and a filter frame surrounding the antiviral filter medium.

Additionally, the present invention provides an air conditioning device including an antiviral filter medium according to the present invention.

The antiviral filter media according to the present invention possesses antiviral performance and has excellent air filtration efficiency through the provided breathability, and furthermore, even when the usage time is extended for a long time, the deterioration of air filtration performance is prevented or minimized. Therefore, it is very suitable as a filter for various air conditioning devices and as a filter medium for various masks. In addition, depending on the difficulty of survival of hospital microorganisms such as viruses in the filter media, it can be used as a fabric for bedding, protective clothing, and medical clothing.

1 is a cross-sectional schematic diagram of an antiviral filter medium according to an embodiment of the present invention;
Figure 2 is a surface SEM photograph of the first member included in the antiviral filter medium according to an embodiment of the present invention;
FIGS. 3A to 3C are SEM photographs of the surface of the first member included in the antiviral filter medium according to an embodiment of the present invention, FIG. 3A is an SEM photograph of the surface of the first member electrospun with PVDF, and FIG. 3B is a photograph of the surface of PTFE. Figure 3c is an SEM photograph of the surface of the first member electrospun with polyether sulfone, and Figure 3c is an SEM photograph of the surface of the first member electrospun with polyether sulfone.
Figure 4 is a surface SEM photograph of the fourth meltblown member included in the antiviral filter medium according to an embodiment of the present invention;
Figure 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 its pore diameter;
Figure 5b is a schematic diagram showing an SEM photograph of the first member formed of microfibers and their pore diameters in contrast to Figure 5a;
Figure 6 is a schematic diagram showing the dust filtration mechanism of the electrostatically treated meltblown nonwoven fabric as the fourth member included in the antiviral filter medium according to an embodiment of the present invention, and the dust collected on the surface of the fibers in the electrostatically treated meltblown nonwoven fabric. SEM photo showing dust,
Figure 7 is a graph showing the decrease in filtration efficiency with use time when electrostatically treated meltblown nonwoven fabric is used alone as the fourth member included in the antiviral filter medium according to an embodiment of the present invention;
Figure 8 shows 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 (fourth member) according to a comparative example. A graph comparing the change in filtration efficiency over time between (MB) + second member (CCL70)),
Figure 9 is an SEM photograph of contaminants collected in 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 diagram of an air filter unit according to an embodiment of the present invention.

Hereinafter, with reference to the attached drawings, embodiments of the present invention will be described in detail so that those skilled in the art can easily implement the present invention. The present invention may be implemented in many different forms and is not limited to the embodiments described herein.

Referring to FIG. 1, the antiviral filter medium 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 support function. (10), it may further include a porous third member 30 having antibacterial properties and a porous fourth member 40 that has been electrostatically treated.

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

The fiber (1) with the antiviral component includes a known fiber-forming component (2) capable of forming fibers in addition to the antiviral component (3). Preferably, the fiber-forming component (2) is on the fiber. It may be a known component that can be implemented in a shape, and preferably may be a component that can be electrospun. The fiber-forming component (2) may include one or more components selected from the group consisting of fluorine-based compounds, 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 one or more selected from the group consisting of Roethylene-Ethylene Copolymer (ECTFE) and polyvinylidene fluoride (PVDF). Preferably, the fiber-forming ingredient may include polyvinylidene fluoride (PVDF) because it has a low manufacturing cost, facilitates mass production of nanofibers through electrospinning, and has excellent mechanical strength and chemical resistance. Alternatively, the fiber-forming component has excellent wettability in a coating solution containing an antiviral component, which will be described later, and polyacrylonitrile (PAN) can be preferably used in consideration of the adhesion between the surface of the fiber-forming component and the antiviral component. In particular, considering the interaction between the liquid droplets and the fiber surface when the virus contained in the fine liquid droplets derived from saliva passes through the filter medium, the virus can be killed with greater efficiency if polyacrylonitrile fiber-forming ingredient is used. 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. Specifically, various functional groups contained in the surfactant bind to the virus to improve antiviral performance. A surfactant that can be expressed may be used. As an example of this, the surfactant may be a cationic surfactant and/or an anionic surfactant. The anionic surfactant may be a known anionic surfactant. For example, C8 to C22 alkyl sulfonate salts such as sodium lauryl sulfate, and/or alpha sulfo salts such as linear alkyl benzene sulfonic acid. Nated carboxylic acid or its ester can be used. In addition, the cationic surfactant can be used without limitation in the case of known cationic surfactants, and for example, cetyl trimethylammonium bromide can be used. In the case of Sodium Lauryl Sulfate as an anionic surfactant and Cetyl trimethylammonium bromide as a cationic surfactant, excellent antiviral performance can be achieved even at low concentrations. It has the advantage of being usable and not impeding air permeability.

Meanwhile, the surfactant may be selected to improve the hydrophilicity of the first member 20 in addition to exhibiting 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 a 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 FIG. 1, and specifically, the surface of the fiber (1). It can be provided to cover part or all of the material, which can further improve antiviral performance or hydrophilicity.

In addition, the antiviral component (3) containing the surfactant is deposited on the fiber (1) by dipping the first member (20) in a coating solution containing the antiviral component (3). Alternatively, it may be provided on the fiber (1) by mixing the antiviral component (3) with the electrospinning solution to form the first member (20) and then electrospinning it.

In addition, the fiber 1 may have an average diameter of 0.05 to 1㎛, for example, 0.1 to 0.4㎛. Additionally, 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, for example, 0.5 to 2 μm, which may be more advantageous in achieving the purpose 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 a coating solution, the coating solution contains the surfactant in the coating solution at a concentration of 0.1 to 1% by weight, more preferably. Can be contained at a concentration of 0.1 to 0.6% by weight. If it is contained in a concentration less than 0.1% by weight, the expression of antiviral properties may be weak. Additionally, if provided at a concentration exceeding 1% by weight, the air permeability of the first member may be reduced. In addition, as will be described later, the antiviral filter medium can be processed into a shape that is bent multiple times as shown in FIG. 10, but there is a risk that the antiviral properties may be deteriorated due to significant detachment of the antiviral component (3) during the processing process.

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

The above-described first member 20 may further include a porous second member 10 on one side that performs a support function.

There is no particular limitation if the second member 10 is a porous member that typically serves as a support, but its shape may preferably be woven, knitted, or non-woven. For example, in the case of non-woven fabric, known non-woven fabrics such as dry non-woven fabric such as chemical bonding non-woven fabric, thermal bonding non-woven fabric, air-lay non-woven fabric, wet-laid non-woven fabric, spanless non-woven fabric, needle-punched non-woven fabric or melt-blown fabric can 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 considering the desired strength, filtration efficiency, etc., and the present invention is not particularly limited thereto. However, in order to more easily achieve the purpose of the present invention, a nonwoven fabric containing fibers with a diameter of 30 to 50 ㎛, a basis weight of 30 to 150 g/m2, and an average pore diameter of 30 to 100 ㎛ can be used.

Additionally, the material of the second member 10 is not limited. As a non-limiting example, it may preferably include synthetic fibers selected from the group consisting of polyester, polypropylene, nylon, and polyethylene. However, the second member 10 may include heat-sealable fibers so that it can be attached to the first member 20 without a separate adhesive. The heat-sealable fiber may be low-melting point polyester or low-melting point polyolefin-based, and preferably may contain a low-melting point polyolefin-based component, and more specifically, a sheath having polyethylene and a polyolefin having a higher melting point than the sheath. It may be a core-sheath type composite fiber formed with a core containing propylene. The first member 20 may include small fibers 1 with a diameter of 1㎛ or less. When the second member 10 is formed of polyolefin-based fibers, it is formed through heat fusion with the first member 1. When bonded, it exhibits better bonding characteristics compared to the case where a second member made of polyester fibers is used, and has excellent flexibility compared to a second member made of polyester fibers with strong brittle characteristics, so it can save air. It can better respond to the external force applied as it passes through, and thus can be advantageous in preventing separation at the bonding interface.

Additionally, the antiviral filter medium 100 may further include a third member 30 that exhibits antibacterial properties. The third member 30 may be used without limitation if it is a porous member containing a known ingredient that exhibits antibacterial properties. Preferably, the third member 30 may include fibers containing silver that exhibit 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 combination of silver wire and/or silver-containing metal wire mixed with non-metallic conventional fibers. It could be a speaker. Regarding the metal wire containing other metals such as copper, it may be formed linearly by mixing metals other than silver in a non-solubilized state, that is, in a non-alloyed state with silver. When a metal other than silver is mixed with silver in an undissolved state, the silver and the other metal may be arranged so that the silver and the other metal occupy a predetermined area regularly or irregularly, respectively, in a linear region of one strand. For example, it may be a double structure in which silver surrounds the outside of a copper wire to form a layer. At this time, the copper wire can provide excellent flexibility to the silver wire, and the average thickness of the surrounding silver may be 3 to 3200 nm, and preferably the average thickness may be 5 to 3000 nm. If the average thickness of the surrounding silver is less than 3 nm, the central metal, copper, is easily manufactured to be exposed to the outside, so the antibacterial function may be reduced, and the antibacterial function may be further reduced due to silver being detached from the silver wire, or the detached silver may be used to There is a risk of being inhaled into the human respiratory tract or remaining on the skin. Additionally, if the average thickness of the surrounding silver exceeds 3200 nm, the flexibility of the silver wire may decrease. This double-structured silver wire has a double structure in which the silver plate surrounds the outside of the copper material by integrating the drawn copper material and the silver plate through the step of drawing the copper material to a predetermined diameter and the cladding process. It may be formed by including the step of obtaining a wire and the step of obtaining a silver wire through wire drawing of the wire of the double structure. Alternatively, the silver wire may be obtained by treating the drawn copper material with a solution containing a liquid Ag powder solution, coating the surface of the copper material with a uniform thickness of Ag, and then performing wire drawing. Alternatively, silver wire may be obtained by plating silver on the drawn copper material and subjecting it to wire drawing.

Next, the form of the yarn formed by plying the silver wire with a non-metallic conventional fiber will be described. The silver wire and the conventional fiber are manufactured using a known manufacturing method in the fiber field for plying two types of fibers and a known method of two types of fibers. It may be a plied yarn implemented by appropriately adopting an arrangement structure. At this time, the silver wire used may be a wire made only of silver or a metal wire containing silver and other metals. As an example, the plied yarn is a seal yarn having a triple-layer structure cross-section including a core, 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. You can.

The core and second covering yarns can be used without limitation as long as they are fibers that can be used to improve the flexibility and elasticity of the plied yarn, preferably at least one selected from natural fibers and synthetic fibers, more preferably poly. Ester-based fibers can be used. In addition, the core material and the second covering yarn may be formed of a mono yarn or a plurality of filament yarns, and preferably may be a fiber formed of a plurality of filament yarns. In addition, the screening and second covering yarns can be used without limitation as long as they are fibers with a fineness that can be commonly used in the industry, and preferably each independently has a fineness of 20 to 100 De' (denier), and more preferably, The fineness may be 30 to 75 De'. If the fineness of the screening and second covering yarns is independently less than 20De', the antibacterial performance and durability of the single yarn of the silver wire may be reduced, and if the fineness exceeds 100De', the elasticity decreases and the bonding strength with the first member, etc. decreases. There is a risk that interfacial separation may occur due to this.

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

Meanwhile, the third member 30 is a member implemented to have a porous structure including the above-described silver wire made of silver, a metal wire containing silver, and/or a plied yarn. Specific examples thereof include fabric, knitted fabric, and non-woven fabric. Or it may be a mesh sheet. At this time, the fabric, knitted fabric, non-woven fabric, or mesh sheet may further include naturally-dyed fibers and/or synthetic fibers that do not contain silver wire.

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

The fourth member 40 may be a member through which outdoor air to be filtered primarily passes, and thus may perform the function of improving filtration performance for fine particles in the air. To this end, the fourth member 40 may be a porous member that functions to filter fine dust, dust, etc. contained in the air using electrostatic force. The fourth member 40 may be, for example, a known non-woven fabric, and preferably may be an electrostatically treated meltblown non-woven fabric. It should be noted that the electrostatic treatment can be applied to the entire porous member, but only to a part of it. Since known methods used in the manufacture of conventional electrostatic treatment filters can be appropriately adopted, detailed description thereof is omitted. do.

In addition, the diameter and basis weight of the fibers contained in the fourth member 40 can be appropriately adjusted depending on the purpose. In order to ensure improved filtration performance and durability, the fourth member 40 has a diameter of 1 to 10 ㎛. It contains phosphorus fibers and may have a basis weight of 15 to 50 g/m2. In another example, the basis weight may be 20 to 35 g/m2. Additionally, the average pore diameter may be 20㎛ or less, and in another example, 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. Additionally, if the average diameter of the fibers forming the fourth member 40 is excessively small, air permeability may decrease and pressure loss may increase, and if the average diameter of the fibers is excessively large, filtration efficiency may decrease. In addition, if the basis weight of the fourth member 40 is excessively low, the filtration efficiency may decrease as the deviation increases, or uniform filtration efficiency may not be achieved, and if it is excessively large, the air permeability may decrease and pressure loss may increase. You can.

In addition, the fiber forming the fourth member 40 is a synthetic polymer component selected from the group consisting of polyester-based, polyurethane-based, polyolefin-based and polyamide-based; Alternatively, it may contain a natural polymer component including cellulose, and may include polypropylene as an example.

Meanwhile, in the case of an antiviral filter medium in which the fourth member 40 and the first member 20 are combined, a synergistic effect is achieved in terms of durability of filtration performance with the first member 20. Specifically, the above-described first member 20 may be formed by accumulating fibers of 1 μm or less to form a three-dimensional network structure. At this time, the first member 20 can be designed to have a pore size capable of physically filtering fine dust of PM2.5 or less, and a flow path can be formed to prevent a decrease in the flow rate of passing air. At this time, the first member 20 compensates for the problem of reduced collection efficiency due to static electricity that may occur in the electrostatically treated fourth member 40 and can function to maintain the designed filtration efficiency even for a long period of time.

Explaining this with reference to FIGS. 6 to 8, the electrostatically treated fourth member 40 uses electrostatic force to adsorb dust to the fiber surface. As time passes, the electrostatic force decreases, and after 5 months of use, the filtration efficiency decreases. The efficiency drops to less than 50% of the initially designed efficiency, and there is a problem with the replacement cycle being very short. However, as shown in FIG. 8, when the first member 20 is used together with the electrostatically treated fourth member 40, the collection efficiency decreases, unlike when only the fourth member 40 is used. Although it is small and not shown in the graph, there is an advantage in that the collection efficiency can be maintained at more than 95% of the initially designed value even if it lasts for several months.

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

In addition, the antiviral filter medium 100 or the air filter unit 200 described above can be used as a replacement for air filters provided in various known air conditioning devices. The air conditioning device may be an air conditioning device installed in vehicles such as buses and private cars, transportation vehicles such as subways and trains, various public buildings, etc., or an air purifier installed in various indoor spaces, and the air conditioning device may be equipped with an anti-viral function. By providing a filter medium, it is possible to filter or kill pathogenic microorganisms such as various bacteria and viruses contained in the air introduced from the outside or circulated indoors.

The present invention will be described in more detail through the following examples, but the following examples do not limit the scope of the present invention, and should be interpreted to aid understanding of the present invention.

<Example 1>

Polyacrylonitrile (PAN) on one side of the second member, which is a nonwoven fabric (Namyang Nonwovens Co., Ltd., CCP30) made of core-sheath type composite fibers with a thickness of about 20㎛ and a melting point of about 120℃, with polyethylene as the sheath and polypropylene as the core. ) is a filter in which the first and second members, which are PAN nanofiber webs, are fused together by electrospinning a spinning solution containing fiber-forming ingredients and then performing a calendering process by applying heat and 1kgf/cm2 pressure at a temperature of 140℃. A filter medium was prepared. At this time, the PAN nanofiber web had an average fiber diameter of 0.2㎛, a basis weight of 20g/㎡, and an average pore diameter of 1㎛.

The prepared filter medium is immersed in an antiviral coating solution, which is an aqueous solution of an anionic surfactant, such as sodium lauryl sulfate, at a concentration of 0.1% by weight, then taken out, passed through calendering to remove excess coating solution, and then heated to a temperature of 70°C. By drying, an antiviral filter medium as shown in Table 1 below was prepared.

<Examples 2 to 6>

An antiviral filter medium was manufactured 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.

<Comparative Example 1>

It was manufactured in the same manner as in Example 1, but without treatment with the antiviral coating solution, and the prepared filter medium was used.

<Experimental example>

The following physical properties were evaluated for the filter media according to Example 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 tall. Afterwards, 200㎕ of PED virus (coronaviridae, Enveloped RNA virus) was treated on each specimen, left at 23℃ for 14 hours, and then the specimen was mixed with 1X DMEM (0.3% Tryptose Phosphate Broth, 0.02% Yeast Extract, 1% antibiotic-antimycotic, 800㎕ of inoculation medium (5ug/ml trypsin) was added to recover the virus located on the specimen.

After decimal dilution of the inoculation medium containing the recovered virus, 100㎕ per dilution was inoculated into 5 wells, adsorbed in a CO ₂ incubator for 1 hour, the inoculum was removed, and the virus culture medium was inoculated into 2× VERO cells. 200 ㎕ per well was dispensed into a 96-well plate containing 10 ⁴ cells/well and cultured in an incubator for 5 days. Afterwards, the CPE of the cells was confirmed 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 the inoculation medium in the same manner after leaving 200㎕ of the virus stock solution at 23°C for 14 hours, and the TCID value was 5.0000.

2. Antiviral performance B

The specimen was prepared to be 4 cm wide and 4 cm tall. After placing the prepared specimen on a 1.5ml tube, 200 ㎕ of PED virus was treated on each specimen and centrifuged at 23°C. Afterwards, 800 ㎕ of inoculation medium, which is 1 The CPE of the cells was confirmed and the TCID value was calculated in the same manner as evaluation A, 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

Air permeability was measured under the same conditions by attaching a filter medium to an air permeability tester (TEXTEST). Regarding the measured results, the air permeability of Comparative Example 1 was set as 100%, and the air permeability of the remaining examples was expressed as a relative percentage. The closer the percentage is to 0, the greater the change in air permeability.

Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Comparative Example 1 Surfactant (type/concentration (% by weight)) 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, which is sodium lauryl sulfate, and B is a cationic surfactant, which is cetyl trimethylamonium bromide.

As can be seen in Table 1,

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

On the other hand, it can be seen that in Example 6, where the concentration of surfactant was excessive, air permeability was severely impaired.

Although one embodiment of the present invention has been described above, the spirit of the present invention is not limited to the embodiment presented in the present specification, and those skilled in the art who understand the spirit of the present invention can add components within the scope of the same spirit. , other embodiments can be easily proposed by change, deletion, addition, etc., but this will also be said to be within the scope of the present invention.

Claims (16)

An antiviral filter media bent to alternately form peaks and valleys in one direction,
It includes a first member formed of fibers whose surface is coated with an antiviral ingredient after being treated with a coating solution containing an antiviral ingredient containing a cationic surfactant or an anionic surfactant,
The cationic surfactant or anionic surfactant is an antiviral filter media provided at a concentration of 0.1 to 0.6% by weight in the coating solution. delete delete According to paragraph 1,
An antiviral filter medium, characterized in that the average diameter of the fibers forming the first member is 0.05 to 1㎛, the basis weight is 2g/m2 or less, and the average pore diameter is 3㎛ or less. delete delete According to paragraph 1,
The cationic surfactant includes cetyl trimethylammonium bromide, and the anionic surfactant includes sodium lauryl sulfate. According to paragraph 1,
An anti-viral filter medium further comprising a porous second member disposed on one side of the first member and performing a supporting function. According to clause 8,
The second member is an antiviral filter medium that includes heat-sealable fibers with a diameter of 30 to 50 ㎛ and is a nonwoven fabric with a basis weight of 30 to 100 g/m2. According to clause 9,
The heat-sealable fiber is an anti-viral filter media that is a core-sheath type composite fiber formed with a sheath provided with polyethylene and a core portion provided with polypropylene having a higher melting point than the sheath. According to paragraph 1,
An antiviral filter medium further comprising at least one of a porous third member that is a woven, knitted, nonwoven, or mesh sheet formed of fibers containing silver, and a fourth member that is an electrostatically treated meltblown nonwoven fabric. According to clause 11,
The third member is formed through a plied yarn including a silver line, and the plied yarn includes a core, a first covering yarn including a silver line surrounding the core, and a first covering yarn surrounding the outside of the core. An antiviral filter medium comprising a second covering yarn. According to clause 11,
The fourth member is an antiviral filter medium including polypropylene fibers with a diameter of 1 to 10 μm and a basis weight of 15 to 50 g/m2. According to clause 11,
A porous second member that performs a support function is further provided on one side of the first member,
An anti-viral filter medium in which a third member and a fourth member are arranged in that order on the other side opposite to one side of the first member. An antiviral filter medium according to any one of claims 1, 4, and 7 to 14; and
An air filter unit comprising a filter frame surrounding the antiviral filter medium. An air conditioning device comprising an antiviral filter medium according to any one of claims 1, 4, and 7 to 14.

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