KR102193849B1 - Customized fine dust collecting system - Google Patents

Abstract

The present invention relates to a filter for removing harmful substances and odors, and more specifically, to a filter that has non-flammability and chemical resistance by using a non-flammable metal oxide silica material. The present invention includes a mesh matrix layer, a sheet matrix layer, an antibacterial filter layer, and a natural fiber layer.

Description

Filter for removing harmful substances and odors {CUSTOMIZED FINE DUST COLLECTING SYSTEM}

The present invention relates to a filter for removing harmful substances and odors, and more particularly, it is characterized in that it has non-flammability and chemical resistance by using a non-flammable metal oxide silica material.

The present invention relates to an adsorption filter that removes ozone, acidic or alkaline harmful gases generated in industrial sites and volatile harmful gases or harmful substances and odors generated in an incinerator, etc., and workability by preventing sagging or thermal deformation of the filter. In addition to improving, the present invention relates to a new filter capable of adsorbing various kinds of contaminants and improving filter adsorption power compared to filters in which a single layer or a matrix of the same type is stacked.

In general, unlike dust collection filters that remove foreign substances such as dust through dust collection, adsorption filters remove odors and harmful chemicals by using the adsorption of activated carbon, so they can be manufactured in various ways, but usually activated carbon on nonwoven fabrics It is manufactured in the form of a storage.

However, the type of nonwoven filter containing activated carbon has a problem in that performance such as deodorization is deteriorated due to the particle nature of the activated carbon, and recently, in order to solve this problem, a nonwoven filter manufactured by directly applying activated carbon to a nonwoven fabric has been proposed. have.

As an example of such a non-woven filter, activated carbon is sprayed onto the fabric into which the adhesive component has penetrated, and by vibrating, activated carbon particles are deposited from the surface of the fabric into the pores inside the fabric. Although a filter to increase was developed, this type of nonwoven filter also has a problem in that the activated carbon particles penetrate between the nonwoven fibers, greatly reducing the air permeability, thus increasing pressure loss, making it difficult to use as an air filter. In order to overcome the problem, when the amount of activated carbon applied to the nonwoven fabric is reduced, the original performance of activated carbon such as deodorization is deteriorated.

In addition, when using such a nonwoven fiber, there is a disadvantage that it is vulnerable to fire and is easily damaged by harmful chemicals.

In determining the quality and performance of the adsorption filter, the following factors must be considered: 1) Whether the removal efficiency and adsorption capacity of harmful gases and harmful substances are secured, and 2) the filter caused by physical shock such as vibration or wind speed. Whether wear or loss of life occurs, 3) Whether the pressure loss of the fluid passing through the chemical adsorption filter can be minimized during filtration, 4) Whether secondary contamination occurs by the adsorbent used for filtration, etc.

Existing known adsorption filters are provided in the form of a matrix in which activated carbon is impregnated with a metal mesh, and because of the use of impregnated activated carbon, the collection of harmful gases is large and can be applied to high-concentration gases, as well as metals such as polyethylene mesh or aluminum. Since it is possible to evenly impregnate the impregnated activated carbon particles on the net, there is an advantage in that there is little pressure loss. In addition, the support is flexible, so it has the advantage that it can be manufactured freely in a flat, zigzag, or tubular shape. However, in the case of a filter using activated carbon impregnated with a metal mesh, as the purification time increases, the amount of salt generated increases, blocking pores of the adsorption filter, thereby causing a problem in that the fluid pressure is lost and the function as a filter is deteriorated.

Accordingly, the present inventors have attempted to develop an adsorption filter capable of removing odors caused by bacterial growth and secondary contamination that may occur in the adsorption filter while satisfying noncombustibility and chemical resistance by using a non-combustible metal oxide silica material.

Korean Patent Registration No. 10-0358262

An object of the present invention is to solve the problems of the conventional activated carbon nonwoven fabric filter described above, while improving the performance of adsorption and deodorization of harmful substances, and securing air permeability that can be used as an air filter. It is to provide an adsorption filter capable of lowering the pressure loss while increasing the adsorption performance of the filter used.

In addition, another object of the present invention is to provide an adsorption nonwoven fabric filter capable of simultaneously satisfying the above-described adsorption performance and breathability while exhibiting non-combustibility and chemical resistance by using a non-combustible metal oxide silica material.

The technical problems to be achieved in the present invention are not limited to the technical problems mentioned above, and other technical problems that are not mentioned will be clearly understood by those of ordinary skill in the technical field to which the present invention belongs from the following description. I will be able to.

An aspect of the present invention provides an adsorption filter composed of a mesh matrix layer with an adsorbent having air permeability, a sheet matrix layer with an adsorbent, an antibacterial filter layer, and a natural fiber layer.

Specifically, the reticulated matrix layer includes organic polymer materials such as polyester, nylon, acrylic, polyethylene, polypropylene, etc., metal materials such as aluminum, copper, and iron, and glass according to standards such as flexibility, heat resistance, and secondary contamination. Inorganic materials such as fiber and carbon fiber, and composite materials in which organic, inorganic, and metallic materials are mixed can be used.

More specifically, the mesh matrix layer includes a plurality of nanofibers having a line width of about 5 to 50 nm prepared by electrospinning a raw material containing PVDF (polyvinylidene fluoride) on the substrate. It may be composed of a nano-mesh that is formed at intervals of to 100 nm.

At this time, the "line width" of the nanofiber means the shortest distance among the straight line distances in the width direction connecting any two points on the surface of one nanofiber in the width direction perpendicular to the length direction of one nanofiber. 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 nanofibers or nanomeshes.

More specifically, the mesh matrix layer 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 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.

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.

The mesh matrix layer of the present invention is characterized in that the porous nanofibers form a nanomesh, and harmful substances and fine particles are collected by the porosity and various mesh pore sizes.

At this time, the mesh matrix layer is characterized in that the flame resistance and chemical resistance are improved by treating a non-combustible composite metal oxide.

Specifically, the metal element constituting the metal oxide is not particularly limited, and any metal element constituting the stable oxide at room temperature, pressure, and atmosphere may be used. Specific examples of such metal oxides include single oxides such as silica (silicon dioxide), alumina, titania, zirconia, magnesia (MgO), iron oxide, copper oxide, zinc oxide, tin oxide, tungsten oxide, vanadium oxide, and two types. Composite oxides containing the above metal elements (for example, silica-alumina, silica-titania, silica-titania-zirconia, etc.) are mentioned. Further, in the case of a composite oxide, it is also possible that a single oxide contains an alkali metal or an alkaline earth metal (after the fourth period (Ca) of the periodic table), which is relatively sensitive to moisture, as a constituent metal element.

Among the metal oxides that can be used in the present invention, silica or a composite oxide containing silica as a main component is preferred because it is lightweight and can reduce the bulk density, and is inexpensive and easy to obtain. When the silica is used as the main component, the molar ratio of silicon (Si) in the element group other than oxygen contained in the composite oxide is 50% or more and less than 100%, preferably 65% or more, and more preferably 75%. Or more, and more preferably 80% or more.

In the case of using a composite oxide containing silica as a main component, examples of the metal elements contained in addition to silicon include metals of Group II of the periodic table such as magnesium, calcium, strontium and barium; Group III metals of the periodic table such as aluminum, yttrium, indium, boron, and lanthanum (in addition, boron is treated as a metallic element); And metals of Group IV of the periodic table, such as titanium, zirconium, germanium, and tin, and among them, Al, Ti, and Zr can be particularly preferably employed. The composite oxide containing silica as a main component may contain two or more types of metal elements other than silicon.

The metal oxide powder of the present invention has a specific surface area (BET specific surface area) of 400 to 1000 m 2 /g by the BET method, preferably 400 to 850 m 2 /g. The larger the specific surface area, the smaller the particle diameter of the primary particles constituting the porous structure (network structure) of the independent particles of the metal oxide powder. Therefore, the larger the BET specific surface area is, the smaller the amount of the metal oxide is, the more it is possible to form the skeleton structure of the metal oxide powder particles.

In addition, as described above, the specific surface area by the BET method is to dry the sample to be measured at a temperature of 200°C for 3 hours or more in a reduced pressure environment of 1 kPa or less in pressure, and thereafter, in a liquid nitrogen temperature. It is a value obtained by obtaining the adsorption isotherm only on the adsorption side of nitrogen and analyzing by the BET method.

The metal oxide of the present invention may be in the form of a powder, but is not limited thereto.

Specifically, the composite metal oxide of the present invention may be a mixture of silica-titania, silica-alumina, and silica-zirconia in a weight ratio of 1:1.5:1, but is not limited thereto.

The metal oxide powder may be deposited on the surface of the mesh matrix layer to impart non-flammability and chemical resistance, but is not limited thereto.

The sheet-like matrix layer is made of a nonwoven fabric of a general hot-melt method, and the manufacturing component of the nonwoven fabric is mixed with a polyolefin-based polymer: a polyamide-based polymer: a composite metal oxide in a weight ratio of 100: 100: 15, and then mixed with an adhesive to 100 It was melted at a temperature of to 250 °C to prepare a hot melting sheet foam, but is not limited thereto. If less metal oxide is added than the above numerical range, sufficient non-flammability and chemical resistance of the sheet-like matrix layer cannot be guaranteed, and if an excessive amount is added, the flexibility of the nonwoven fabric decreases, causing a side effect of being broken.

In this case, as the adsorbent used in the adsorption filter, a porous ion exchange resin, a porous organic-inorganic composite adsorbent, an impregnated activated carbon, an inorganic adsorption type adsorbent, and a nanoporous inorganic adsorbent may be used. It is preferable that the moisture content of the adsorbent is 10 to 35%. These adsorbents can be manufactured in various shapes and sizes, such as spherical, granule, injection, or extrudate.

Activated carbon adsorbent is for adsorption and filtering of general harmful gases such as ozone and VOCs. Activated carbon is a particle-type, injection-type or extruded-type activated carbon having a high specific surface area of 1,000㎡/g or more and an average particle diameter of 0.05 -2.00mm, and an adsorbent material having the ability to adsorb harmful gases, for example It may be prepared by impregnating an adsorbent such as KI or H ₃ PO ₃ .

The ion exchange resin adsorbent may be a cation exchange resin or an anion exchange resin, and a mixture of the above ion exchange resins may be used. In addition, various ion exchange resins such as phenolic, acrylic, and styrene can be used. Ion-exchange resin type adsorbent is a porous adsorbent with a specific surface area of 300㎡/g or more, and is divided into anionic and cationic exchange resins according to the types of functional groups attached to the resin surface. These ion exchange resin-type adsorbents have an average particle diameter (d) of 0.1 -1.0 mm in the same spherical shape, and their ion exchange capacity is about 1.0-4.0 monoweight/kg, adsorbing harmful gases through neutralization of harmful gases and acid-base. Will be removed.

The inorganic adsorption type adsorbent may be a porous adsorbent such as silica, activated alumina, zeolite, and pillar clay, a metal adsorbent such as magnesium oxide, zirconium oxide, or titanium oxide, or an adsorbent in which the material is hybridized with an organic material such as activated carbon.

In the case of nanoporous inorganic adsorbent, the material is the same as that of the inorganic adsorbent, but the particle diameter of the adsorbent is microporous, mesoporous, and macroporous particles.It is a highly functional adsorbent with very specialized performance and physical properties. . Nanoporous inorganic adsorbent has an excellent effect of adsorbing even a very small amount of harmful substances.

In addition, the adsorption filter according to the present invention may be manufactured using only one of the above adsorbents, but may be used in the form of a mixture of two or more of activated carbon, an ion exchange resin, an inorganic adsorption type adsorbent, and a nanoporous inorganic adsorbent. When a mixed adsorbent is used, a trace amount of ozone, acidic or alkaline harmful gas, volatile harmful gas or harmful substances can be removed, thus maximizing the adsorption performance of the filter.

The organic-inorganic composite adsorbent is an adsorbent obtained by grafting an organic adsorbent component having a functional group on the surface of a porous inorganic material carrier having a large surface area. Here, as the inorganic carrier, a material having a specific surface area of 300 m 2 /g or more, for example, silica, alumina, zeolite, or mesopoa material (MCM-41, etc.) is used, and an average particle size of 0.05-0.20 mm or It is manufactured and used in a spherical shape. In addition, the organic material for attaching the inorganic carrier may include a functional group having OH such as RSO ₃ H or RNH ₄ OH, and this organic component is prepared by grafting the surface of the inorganic carrier with a coupling agent such as alkyl silane.

These adsorbents are used by selecting one or more suitable adsorbents among the adsorbents according to the harmful substances to be removed. For example, when the harmful gas is an acidic gas such as HF, HCl, SO _x, etc., an alkaline ion exchange resin, an organic-inorganic complex adsorbent, an inorganic adsorbent such as activated carbon or zeolite is effective. In the case of an alkaline harmful gas such as ammonia, It is effective to use an acidic ion exchange resin, an organic-inorganic composite adsorbent, an inorganic adsorbent such as activated carbon or zeolite.

In addition, in the case of volatile organic compounds such as organic amines, organic solvents, ozone, dioxin, and phthalate plasticizers such as DOP, harmful gases are difficult to be adsorbed and removed due to acid-alkali neutralization. In this case, a porous adsorbent having a high specific surface area of 500 m 2 /g or more, such as an inorganic adsorbent such as activated carbon or zeolite, may be used.

In addition, specifically, the antibacterial filter layer is the first antibacterial filter layer coated with nanoparticles of at least one selected from the group consisting of copper (Cu), tin (Sn) and silver (Ag) It may be composed of a second antibacterial filter layer prepared by applying, but is not limited thereto.

More specifically, the first antibacterial filter layer made of copper, tin and silver may be composed of 74 to 77.2% by weight of copper, 20 to 22.3% by weight of tin, and 0.5 to 6% by weight of silver, but is limited thereto. no.

Further, specifically, natural product extracts from indicating the antimicrobial activity is antibacterial and anti myrrh (Commiphora myrrha Holmes) as a natural product that represents the viral effect, a directed tree (Boswellia Carterii), honeysuckle (Lonicera japonica), octagonal (八角, Illicium verum Hook. f. ), Bongchul(蓬朮, Curcuma zedoaria ), Beonhaengcho ( Tetragonia tetragonioides ), Schisandra chinensis , Artemisia campestris , Pine needles, and propolis. However, it is not limited thereto.

More specifically, the mixed extract is Myrrh ( Commiphora myrrha Holmes ) 15 parts by weight, frankincense ( Boswellia Carterii ) stems and roots 10 parts by weight, gold and silver ( Lonicera japonica ) 10 parts by weight, octagonal (八角, Illicium verum Hook.f .) 8 parts by weight, bongchul (蓬朮, Curcuma zedoaria) 5 parts by weight, tetragonia tetragonioides (Tetragonia tetragonioides) 5 parts by weight of Schisandra chinensis (Schisandra chinensis), 5 parts by weight, injinssuk (Artemisia campestris) 3 parts by weight of pine needle 3 parts by weight and 1 part by weight of propolis may be mixed and prepared by reflux extraction at 75° C. for 2 to 4 hours with 80 to 90% ethanol, but is not limited thereto.

In the present invention, specifically, the extract derived from the natural product may be extracted with water, a C ₁ to C ₄ lower alcohol, or a mixed solvent thereof. More specifically, it may be extracted using distilled water or 80 to 90% ethanol, but is not limited thereto.

Specifically, in the extraction process of the extract, one or more methods selected from the group consisting of cold needle, warm needle, heating, reflux, and ultrasonic extraction may be used alone or in combination, and are not limited thereto, and may be appropriately changed and applied as necessary. I can.

In addition, the extract may be concentrated or the solvent may be removed by performing an extraction or fractionation process, followed by a vacuum filtration process or further concentration and/or lyophilization, and specifically, a process of concentrating under reduced pressure after extraction. The extract can be obtained through the process, but is not limited thereto and may be appropriately changed and applied.

Specifically, the fibers constituting the natural fiber layer of the adsorption filter are 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, 3 parts by weight of fructo-oligosaccharide mixed at room temperature 2 It was used prepared by aging for 4 hours. However, it is not limited thereto, and it can be applied by appropriately changing it as necessary.

At this time, in order to impart non-flammability and chemical resistance to the natural fiber layer, the composite metal oxide was treated in the same manner as the mesh matrix.

The adsorption filter of the present invention improves the performance of adsorption and deodorization of harmful substances, while securing air permeability enough to be used as an air filter, thereby increasing the adsorption performance of the filter used as an adsorptive air filter and lowering the pressure loss at the same time. It is characterized by having.

In addition, the filter of the present invention is characterized in that it is capable of simultaneously satisfying the above-described adsorption performance and air permeability while exhibiting non-flammability and chemical resistance by using a non-combustible metal oxide silica material.

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.

In addition, terms including ordinal numbers such as first and second are used to describe various elements, and are only used for the purpose of distinguishing one element from other elements, and to limit the elements. Not used. For example, without departing from the scope of the present invention, a second component may be referred to as a first component, and similarly, a first component may be referred to as a second component.

In addition, terms used in the present specification are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In addition, terms such as "comprises" or "have" described herein are intended to designate the presence of features, numbers, steps, actions, components, parts, or a combination thereof described in the specification, but one or a combination thereof. It is to be understood that the above other features, or the possibility of the presence or addition of numbers, steps, actions, components, parts, or combinations thereof, do not preclude in advance.

In addition, terms such as "unit", "group", and "module" described in the specification mean a unit that processes at least one function or operation, which may be implemented by hardware or software or a combination of hardware and software. In addition, "a or an", "one", "the" and similar related words are different from this specification in the context of describing the present invention (especially in the context of the following claims). Unless otherwise indicated or clearly contradicted by context, it may be used in a sense encompassing both the singular and the plural.

In addition to the above terms, specific terms used in the following description are provided to aid understanding of the present invention, and the use of these specific terms may be changed in other forms without departing from the technical spirit of the present invention.

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

Example 1. Preparation of the inventive adsorption filter

The adsorption filter of the present invention is composed of a mesh matrix layer with an adsorbent, a sheet matrix layer with an adsorbent, an antibacterial filter layer, and a natural fiber layer.

Specifically, the mesh matrix layer was prepared by treating a non-combustible composite metal oxide on a nano-mesh prepared by forming porous nanofibers containing PVDF as a main material at intervals of about 5 to 100 nm. Details about this are as described above.

Specifically, the sheet-like matrix layer is prepared by mixing a polyolefin-based polymer: a polyamide-based polymer: a composite metal oxide in a weight ratio of 100: 100: 15, and then using a hot-melting sheet foam. Details about this are as described above.

Specifically, the antibacterial filter layer is a first antibacterial filter layer coated with nanoparticles of at least one selected from the group consisting of copper (Cu), tin (Sn) and silver (Ag), and a natural product-derived extract showing an antibacterial effect is applied to the fabric. The second antibacterial filter layer was prepared as described above, and details thereof are as described above.

In addition, finally, the natural fiber layer constituting the adsorption filter was prepared by treating fibers obtained from hemp husk and coconut fruit husk with microorganisms and complex metal oxides, and details thereof are as described above.

Comparative Example 1. Preparation of adsorption filter not treated with composite metal oxide

The adsorption filter of Comparative Example 1 of the present invention was manufactured in the same manner as in Example 1, except that the step of treating or adding metal oxides in the method of manufacturing the adsorption filter of Example 1 was omitted.

Comparative Example 2. Preparation of an adsorption filter not including an antibacterial filter layer

The adsorption filter of Comparative Example 2 of the present invention was manufactured in the same manner, except that the antibacterial filter layer was omitted in the method of manufacturing the adsorption filter of Example 1 above.

Experimental Example 1. Noxious gas removal rate, pressure loss result and non-flammability confirmation

The difference between the toxic gas removal rate and the pressure loss was compared according to the manufacturing method of the adsorption filter of the present invention.

At this time, the chemical resistance was immersed in a 10% NaOH solution for 24 hours, washed with running water, dried the above examples and comparative examples in a natural state, and checked the crack state to decrease the hardness due to hydrolysis and diluted to 10%. After exposure to the prepared hydrochloric acid solution, two experiments were conducted in parallel to confirm the degree of corrosion, and are shown in Table 1 below (◎: excellent, △: normal, x: poor).

division Noxious gas removal rate (%) Pressure loss (mmH ₂ O) nonflammable Chemical resistance Example 1 99.1 6.3 O ◎ Comparative Example 1 98.5 6.5 X × Comparative Example 2 98.9 6.3 O ◎

As shown in Table 1, it was confirmed that both filters of Examples and Comparative Examples of the present invention exhibited excellent toxic gas removal rates and pressure loss. However, Comparative Example 1 in which the composite metal oxide was not treated showed poor non-flammability and chemical resistance.

Experimental Example 2. Confirmation of odor removal effect and occurrence of odor due to secondary pollution

Since the adsorption filter of the present invention simultaneously exhibits an effect of removing odors in addition to harmful gases, the effect of removing odors of the adsorption filter of the present invention was confirmed using food waste.

In addition, as organic substances are adsorbed on the surface of the adsorption filter, secondary contamination by microbial propagation occurs, and it was further confirmed whether there is an odor generated therefrom.

Specifically, filters of Examples and Comparative Examples were installed in the exhaust pipe of a conventional food waste reducer.

The exhaust pipe was set to forcibly exhaust moisture and odor generated in the process of drying the food waste at a flow rate of 3.3 m/s, and five ordinary inspectors examined the effect of improving odor by a sensory method.

The inspection method is to have 5 examiners smell each odor at a location 30cm away from the outlet of the food waste exhaust pipe, then 5 points for'no odor', 4 points for'no odor', and 3 points were given to the case where there is a slight odor, 2 points for the case with a severe odor, and 1 point for the case with a very severe odor, and the scores of each examiner were averaged and compared.

In addition, after the test was completed, the Example and Comparative Example filters were stored at room temperature for 3 days, and then the same inspector was placed at the exhaust port without food waste, and the occurrence of odor due to secondary contamination was confirmed by the same method. .

division Deodorization effect (d+0) Deodorization effect (d+3) Example 1 4.6 4.9 Comparative Example 1 4.4 4.7 Comparative Example 2 4.3 2.5

As shown in Table 2, the filter of the present invention exhibits an excellent deodorizing effect. In particular, in the experiment after 3 days, since there is no food waste, it is possible to smell only a slight remaining queer odor, thus obtaining a higher score. On the other hand, in the case of Comparative Example 2 in which the antibacterial filter layer was omitted, it was confirmed that secondary contamination such as microbial propagation of organic matter occurred after 3 days, so that the score decreased significantly without food waste. Specific embodiments of the subject described herein Explained. Other embodiments are within the scope of the following claims.

The present description presents the best mode of the present invention, and provides examples for describing the present invention and for enabling those skilled in the art to make and use the present invention. The thus written specification does not limit the present invention to the specific terms presented. Accordingly, although the present invention has been described in detail with reference to the above-described examples, those of ordinary skill in the art can make modifications, changes, and modifications to these examples without departing from the scope of the present invention.

Therefore, the scope of the present invention should not be determined by the described embodiments, but should be determined by the claims.

Claims (5)

A mesh-like matrix layer with an adsorbent having air permeability secured thereon;
A sheet-like matrix layer with an adsorbent attached thereto;
Antibacterial filter layer; And
In the adsorption filter comprising a natural fiber layer,
The mesh matrix layer is composed of a nanomesh in a form in which nanofibers are formed at intervals of 5 to 100 nm on a substrate,
The nanofibers have a porous surface,
The sheet-like matrix layer is prepared by mixing a polyolefin-based polymer: a polyamide-based polymer: a composite metal oxide in a weight ratio of 100: 100: 15, and then mixing it with an adhesive and melting it at a temperature of 100 to 250 °C to form a hot melting sheet foam. Will,
The antibacterial filter layer is a first antibacterial filter layer coated with nanoparticles of 74 to 77.2% by weight of copper, 20 to 22.3% by weight of tin, and 0.5 to 6% by weight of silver, and an agent prepared by applying an extract derived from a natural product showing an antibacterial effect on the fabric. The adsorption filter consisting of two antibacterial filter layers. delete delete The method of claim 1,
The mesh-like matrix layer, the sheet-like matrix layer, and the natural fiber layer contain a composite metal oxide. The method according to any one of claims 1 or 4,
The adsorption filter, characterized in that it exhibits non-flammability and chemical resistance.