JP2002028414A - Air purifying filter - Google Patents

Abstract

(57) [Summary] The object of the present invention is to provide, in addition to high-efficiency dust removal performance,
An object of the present invention is to provide a composite air purifying filter having both deodorizing properties and antibacterial properties. SOLUTION: The dust removal efficiency of collecting 0.3 μm particles at a wind velocity of 5.3 cm / sec measured according to JIS-B-9908 type 1 is 99% or more and contains a deodorant. An air purifying filter formed by processing a deodorizing filter material into a wave shape and integrating it with an antibacterial substrate, preferably JIS-Z
-1516, in accordance with "exterior corrugated cardboard", air cleaning characterized by being a single-sided corrugated cardboard manufactured by using the dust removing / deodorizing filter medium and the antibacterial base material as a liner. filter.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air purifying filter, and more particularly, to an air purifying filter which efficiently collects dust having a small particle diameter and has deodorizing and antibacterial properties.

[0002]

2. Description of the Related Art In recent years, air purifiers have been widely used in homes and workplaces due to changes in living environment and heightened health consciousness. In recent years, various air conditioners, such as room air conditioners, dehumidifiers, and humidifiers, as well as dedicated air purifiers, tend to have an air purifying function, and have been put to practical use.

[0003] Among the various air cleaning methods, those using a filter do not require special equipment or parts and can be implemented relatively easily. Therefore, air cleaning filters are mainly used for home air conditioners and the like. It is widely used. In particular, room air conditioners and dehumidifiers that do not exclusively purify air,
For devices such as humidifiers, vacuum cleaners and various ventilation fans, it may be difficult to provide a large space for installing an air purification filter, and it is a complex type that combines various air cleaning functions such as dust removal, deodorization, and antibacterial. There is a need for an air purification filter.

In recent years, even in general households,
For example, there is a demand for efficient collection of submicron-order fine particles, such as tobacco smoke, various pathogens and viruses, and high-efficiency dust filters developed for industrial applications such as clean rooms are used in household air. It is used in purifiers, and high-efficiency dust removal is required for the various devices described above.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a composite air purifying filter having both high dedusting performance and deodorizing and antibacterial properties.

[0006]

Means for Solving the Problems As a result of intensive studies to solve the above problems, the present inventors have completed the following invention.

(1) 0.3 μm at a wind speed of 5.3 cm / sec measured according to JIS-B-9908 Type 1
An air cleaning filter obtained by processing a dust-removing / deodorizing filter medium having a particle collection efficiency of 99% or more and containing a deodorizing agent into a wavy shape and integrating it with an antibacterial base material.

(2) In the above invention (1), the JIS
-Z-1516, in accordance with the "exterior cardboard", the air is characterized by being a single-sided cardboard shape produced by using the dust removing and deodorizing filter medium as a liner and the antibacterial base material as a liner. Purification filter.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The air purifying filter of the present invention will be described in detail below.

[0010] The dust removing and deodorizing filter medium according to the present invention is JIS
-B-9908 Wind speed measured in accordance with Type 1 5.3
It is characterized by having a collection efficiency of 0.3 μm particles per cm / sec of 99% or more and containing a deodorant.

The deodorant according to the present invention is a chemical used mainly for the purpose of removing offensive odors, and specifically, activated carbon, impregnated activated carbon, activated carbon fiber, Bincho charcoal, natural and synthetic zeolites, high silica zeolites Adsorbents such as silica, activated alumina, activated clay, sepiolite, organic acid compounds or ion exchange resins; enzymatic deodorants such as iron ascorbic acid and metal phthalocyanine derivatives such as iron, cobalt or manganese; titanium oxide and zinc oxide Photocatalysts, low-temperature oxidation catalysts such as manganese-based oxides and perovskite-type catalysts, synthetic ceramics such as silicon carbide, silicon nitride, calcium silicate, alumina-silica, zirconia, and far-infrared ceramics such as malite, felsongite, etc. Catechin, which is a compound contained in the plant extract component,
Deodorants using tannin, flavonoids and the like are included. If necessary, a plurality of these deodorants may be used in combination, or a hybrid deodorant obtained by combining these deodorants may be used.

As a specific form of the dust-removing / deodorizing filter medium according to the present invention, a laminated type in which a dust-removing filter medium having a predetermined performance and a substrate carrying a deodorant are laminated, a dust-removing filter medium having a predetermined performance, An encapsulation type in which a deodorant is enclosed between base materials,
For example, an enclosure type in which a deodorant is encapsulated between two filter media having a dust removal performance of 90% or more, but the invention is not particularly limited thereto.

In the production of the dust-removing and deodorizing filter medium according to the present invention, as a method of laminating the dust-removing filter medium and the substrate carrying the deodorant, it is only necessary to simply overlap them if the wave-like processing according to the present invention is possible. , Partially or wholly,
Fusion by pin sonic method, adhesion by hot melt powder lamination method such as hot melt spray method or so-called sinter method, stitching by stitch bond method or hydroentanglement method such as needle punch method or so-called spunlace method It may be integrated by confounding or the like.

The dust-removing / deodorizing filter medium according to the present invention has a dust-removing property of 0.3% or more at a wind speed of 5.3 cm / sec measured according to JIS-B-9908 type 1 of 99% or more. However, it is preferable that the filter is equivalent to a HEPA filter having a collection efficiency of 99.97% or more at the rated air flow. Also, 99.999 for particles having a particle size of 0.15 μm at the rated air flow. %, Which may be equivalent to a ULPA filter having a collection efficiency of at least%, and is preferable because fine dust harmful to the human body can be efficiently removed.

Generally, HEPA filter or ULPA
The filter medium of the filter is usually composed of 95% or more of glass fiber by weight and 5% or less of binder, and the glass fiber has a diameter of about 1 to 3 mm and an average diameter of 0.7%.
Ultra-fine glass fiber with a large thickness variation of μm and a diameter of 6
Many are made of chop fibers having a uniform thickness of 10 mm to 10 μm and a length of 5 mm or more, but are not particularly limited thereto. Ceramic fibers, cellulose fibers, polyolefin fibers such as polypropylene, polyester fibers or aramid. It may be made of organic fibers such as fibers.

The dust filter used in the dust filter for dedusting and deodorizing according to the present invention is not particularly limited, but is a filter medium made of an electret (electric stone) which semipermanently retains electric polarization and applies electric force to the outside. In particular, it is preferably made of a melt blown electret, which has features of achieving high dust removal performance and excellent air permeability.

The melt blown electret is generally a melt blown filter mainly composed of polypropylene or a polypropylene-based copolymer resin and electretized by a heat electret method or an electroelectret method. The resin raw material is used for the purpose of improving heat resistance and the like. In some cases, an appropriate amount of a fatty acid metal salt such as aluminum stearate is added.

Examples of the method for processing the dust-removing / deodorizing filter medium according to the present invention into a wave form include a valley-like folding processing called pleat processing and a corrugating processing in corrugated cardboard processing. By processing in this manner, the area of the dust removal / deodorization filter medium can be increased with respect to a certain ventilation area, and the linear velocity of the air passing through the filter medium decreases relatively with respect to a specific air volume. As a result, the pressure loss is reduced and the air permeability is improved.In addition, the collection efficiency and the deodorizing performance are improved, and the rigidity of the filter itself is increased as compared with the use of a single plate. There is an advantage that handleability at the time of replacement is improved.

The antibacterial substrate according to the present invention is obtained by subjecting a substrate having air permeability to antibacterial processing. The material of the air-permeable base material is not particularly limited, and examples thereof include various papers, nonwoven fabrics, woven fabrics, knitted fabrics, nets, felts, foams such as urethane foam, resin films and metal foils. If the sheet has poor air permeability, it can be perforated to improve the air permeability. Above all, a nonwoven fabric is preferable as a material having appropriate air permeability and capable of being formed in a stepped manner as a middle sash.

Non-woven fabrics include polyamide fibers, polyester fibers, polyalkylene paraoxybenzoate fibers, polyurethane fibers, polyvinyl alcohol fibers, polyvinylidene chloride fibers, polyvinyl chloride fibers, polyacrylonitrile fibers, and polyolefin fibers. , Phenolic fiber, synthetic fiber, glass fiber, metal fiber, alumina fiber, inorganic fiber such as carbon fiber, activated carbon fiber, wood pulp, bamboo pulp, hemp pulp, kenaf pulp, straw pulp, bagasse pulp, cotton linter pulp, cotton , Wool, silk and other natural fibers, recycled pulp,
Regenerated cellulose fibers such as rayon, proteins such as collagen, and regenerated fibers made from polysaccharides such as alginic acid, chitin, chitosan, and starch, and fibers obtained by imparting functions such as hydrophilicity and flame retardancy to these fibers. These are used alone or in combination and manufactured by various methods.

The method for producing the nonwoven fabric is not particularly limited, and the web obtained by a dry method, a wet papermaking method, a melt blown method, a spunbond method, a flash spinning method, an air laid method or the like is subjected to hydroentanglement depending on the purpose and application. It can be produced by appropriately combining a physical method such as a method such as a needle punching method and a stitch bonding method, a bonding method using heat such as a thermal bonding method, and a bonding method using an adhesive such as a resin bond.

The antibacterial agent used in the antibacterial substrate according to the present invention is a drug used for the purpose of removing, killing, inactivating or suppressing the propagation of harmful microorganisms and pathogens such as bacteria, molds and viruses. Specifically, inorganic antibacterial agents containing silver, zinc or calcium phosphate as a main component, benzimidazoles, isothiazolines, pyrithiones,
Organic antibacterial agents such as organic arsenic, organic copper, organic iodine, and chlorohexidine; high polymer antibacterial agents such as chitin and chitosan; catechin and Meng Song bamboo extract extracted from tea and persimmon; hinokitiol; And an antimicrobial agent derived from a natural product and a hybrid antimicrobial agent obtained by combining them.

The antibacterial agent used in the present invention is preferably the above-mentioned antibacterial metal salt of the organic antibacterial agent among the hybrid antibacterial agents, and in particular, mercaptopyridine-N-
It is particularly preferable to use a silver salt, a copper salt or a zinc salt of an oxide compound as a main component. Since this antibacterial agent has both antibacterial properties against bacteria derived from the metal salt and fungicidal properties against fungi derived mainly from mercaptopyridine-N-oxide compound, it has a wide range of harmful microorganisms such as bacteria and molds. An effective antibacterial and fungicidal action can be obtained, and a high speed, a large capacity, a long effective period, and very excellent antibacterial and fungicidal properties can be imparted. Therefore, it is particularly useful as an antibacterial agent according to the present invention.

Further, in addition to the metal salt of the mercaptopyridine-N-oxide compound, a benzimidazole compound,
It is more preferable to use a silver salt, a copper salt or a zinc salt of an isothiazolone compound, a benzothiazole compound or a benzothiazolone compound in combination, and an effective antibacterial and fungicidal action can be obtained against a wider range of bacteria and fungi.

An antibacterial agent containing a silver salt, a copper salt or a zinc salt of a mercaptopyridine-N-oxide compound as a main component generally includes an aqueous solution obtained by dissolving a sodium salt of mercaptopyridine-N-oxide in ion-exchanged water. silver nitrate,
It is prepared by stirring and mixing an aqueous solution obtained by dissolving copper nitrate, zinc nitrate or a mixture of these metal salts in ion-exchanged water. The generated salt is insoluble or hardly soluble in water and precipitates as a solid. However, in order to obtain high antibacterial and antifungal properties, the metal salt formed by performing sufficient stirring in the mixing process of the above two aqueous solutions is used. Is preferably dispersed in fine particles.

The air purifying filter of the present invention has a
It is preferable that the pressure loss of the antibacterial base material is sufficiently smaller than that of the deodorizing filter medium, and the pressure loss of the dust removing / deodorizing filter medium (A), the pressure loss of the antibacterial base material (B), The relationship between the three factors of the folding magnification (C) is A / B ≧ 10
It is particularly preferable to satisfy C. A / A
In the case of B <10C, there is a problem that the pressure loss of the air cleaning filter is increased and the air permeability is reduced.

The pressure loss (A) of the dust removing / deodorizing filter medium and the pressure loss (B) of the antibacterial base material according to the present invention are in accordance with JIS-B.
It is measured according to -9908.

The folding ratio (C) when the dust-removing / deodorizing filter material according to the present invention is processed into a wavy shape is defined as the working area (S) of the dust-removing / deodorizing filter material, and the opening area (T) of the ventilation portion after the waving process.
(C = S / T). Generally, the opening area (T) of the ventilation section after the corrugation is equal to the opening area of the ventilation section of the air cleaning filter.

The shape of the antibacterial substrate according to the present invention is generally a flat plate, but is not particularly limited, and may be a curved plate or a wavy shape without departing from the spirit of the present invention. There may be.

The corrugated dust removing and deodorizing filter medium according to the present invention is made of a continuous or intermittent linear polyethylene or the like between corrugated adjacent filter mediums for the purpose of securing the interval between adjacent filter media and reinforcing the filter media. A so-called beating process for applying a thermoplastic resin or the like may be performed, or a separator made of a corrugated aluminum plate or the like may be attached to the valley of the corrugated filter media, or inserted between adjacent filter media in a corrugated shape. A possible saw-shaped spacing plate, a band-shaped film or a net connecting the wave peaks, or the like may be attached. Such processing may be performed when processing an antibacterial substrate or the like into a wave shape.

As a method of integrating the dust-removing / deodorizing filter medium and the antibacterial base material according to the present invention into a corrugated form, a method of integrating them by a framing process and a bonding method such as a method of producing a single-sided corrugated cardboard described below. Alternatively, a method of integrating by lamination or the like may be used.

The air purifying filter of the present invention has a JIS
-Z-1516, preferably in the form of a single-sided corrugated cardboard produced using a dust-removing and deodorizing filter medium and an antibacterial base material as a liner, in accordance with the "exterior cardboard" described in No folds are formed when the wavy shape is processed, so there is no non-venting area.Furthermore, it is difficult for the filter media to deform due to wind pressure. Therefore, there is an advantage that the antibacterial base material functions as a reinforcing material or the like that connects the wave peaks.

The wave shape of the shin according to the third aspect of the present invention is not particularly limited, and may be a sine wave, a pseudo sine wave, a sea wave, a triangular wave, a square wave, a semicircular or fan-shaped arc or trapezoid. A sine wave and a pseudo sine wave having no creases and having a smooth curved wave shape may be used.

The adhesive for producing the single-sided corrugated cardboard according to the present invention is not particularly limited, and is a starch-based adhesive, a polyvinyl acetate-based adhesive such as an ethylene-vinyl acetate copolymer, or a polyvinyl alcohol-based adhesive. Alternatively, a moisture-curable urethane-based adhesive can be used. Above all, moisture-curable urethane-based adhesives can be used at low temperatures,
It has high heat resistance, excellent water resistance, and good adhesion to various materials, and is used advantageously. In addition, when the liner or the middle binder has an adhesive property such as thermoplasticity or pressure bonding property, an adhesive may not be used as required.

The air purifying filter of the present invention further includes an insect repellent, an insecticide, a pest repellent, an aroma, dehumidification, humidity control, permeation of moisture (humidity), adsorption of oil and the like, and water and water, without departing from the spirit of the present invention. It may have various functions such as evaporation of volatile chemicals.

[0036]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. However, the present invention is not limited to the embodiment without departing from the spirit of the present invention.

As shown in FIG. 1, an air purifying filter according to an embodiment of the present invention comprises a wavy dust removing / deodorizing filter medium 1a.
And the antibacterial substrate 2a in the form of a flat plate.

As shown in FIG. 2, the dust-removing / deodorizing filter medium 1a is formed by bonding a dust-removing filter medium 3a and a base material 4 carrying a deodorant by a hot melt spraying method. The dust filter material 3a is an electret filter mainly made of polypropylene and manufactured by a melt blown method.
On the other hand, the substrate 4 supporting a deodorant is a breathable deodorizing filter in which a dry nonwoven fabric mainly composed of polyester / rayon carries a deodorant mainly composed of activated carbon.

The dust / deodorizing filter medium 1a is made of JIS-B-99.
08 The collection efficiency of 0.3 μm particles at a wind speed of 5.3 cm / sec measured according to Type 1 is 99.98%, which corresponds to a so-called HEPA filter.

The antibacterial substrate 2a is made of a dry non-woven fabric mainly composed of polyester / rayon and a breathable material obtained by carrying an antibacterial agent mainly composed of a silver, copper or zinc salt of a mercaptopyridine-N-oxide compound. It is an antibacterial filter.

The air cleaning filter shown in FIG.
According to the “exterior cardboard” described in Z-1516,
It is a single-sided corrugated cardboard made by using the dust removing / deodorizing filter medium 1a as a middle lining and the antibacterial base material 2a as a liner. The middle shin has a waveform similar to a sine wave and has no folds.

The air purifying filter of the present invention illustrated in FIG. 1 is a multifunctional filter having three functions of dust removal / deodorization / antibacterial and has excellent air permeability.

As shown in FIG. 3, an air purifying filter according to another embodiment of the present invention comprises a folded corrugated dust removing / deodorizing filter medium 1b and a flat antibacterial base material 2b in a frame 5.
Through the integration.

As shown in FIG. 2, the dust-removing / deodorizing filter medium 1b is formed by bonding a dust-removing filter medium 3b and a substrate 4 supporting a deodorant by a hot melt powder lamination method called a sinter method. The dust filter material 3b is a high-performance filtration filter mainly made of glass fiber having a specific fiber diameter and manufactured by a wet papermaking method. On the other hand, the substrate 4 supporting the deodorant is the same deodorizing filter as the embodiment shown in FIG.

The dust removing / deodorizing filter medium 1b is made of JIS-B-99.
08 The collection efficiency of 0.3 μm particles at a wind speed of 5.3 cm / sec measured according to Type 1 is 99.97%, which corresponds to a so-called HEPA filter.

The antibacterial substrate 2b is a breathable antibacterial filter in which a dry nonwoven fabric mainly composed of polyester / rayon carries an antibacterial agent mainly composed of catechins extracted from tea.

The frame 5 is made of thick flame-retardant paper. The border between the frame materials and the frame material and the dust removing / deodorizing filter medium 1b or the antibacterial substrate 2
b.

The air purifying filter of the present invention illustrated in FIG. 3 is a multifunctional filter having three functions of dust removing / deodorizing / antibacterial, and a dust removing / deodorizing filter medium 1b.
The filter medium is designed to have a relatively large folding ratio and has a large use area of the filter medium, so that the filter medium has a feature of being excellent in dust removal and deodorization, particularly in its durability (life).

[0049]

The air purifying filter of the present invention is a composite type air purifying filter having both high dedusting performance and deodorizing and antibacterial properties, and is superior to air purifiers and deodorizers. However, the present invention makes it possible to relatively easily impart an excellent air purifying function to equipment having ventilation, such as a room air conditioner, a dehumidifier, a humidifier, a vacuum cleaner, and various ventilation fans.

In particular, the air purifying filter of the second invention of the present invention, which has a single-faced corrugated cardboard shape produced by using a dust removing / deodorizing filter medium and a liner using an antibacterial base material,・ Because there is no fold when processing the deodorizing filter material into a wave shape, there is no non-venting part,
Furthermore, since the filter medium is less likely to be deformed by wind pressure, a dead space where the filter elements are in contact with each other even at a large air flow does not reduce the effective area of ventilation of the filter medium.
The antibacterial base material has advantages such as functioning as a reinforcing material for connecting the wave peaks, and is particularly excellent as a multifunctional filter having both dust removal / deodorization / antibacterial properties.

Although the use of the air purifying filter of the present invention is not particularly limited, it is particularly useful as a filter for an air conditioner. Function can be added.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of an air cleaning filter of the present invention.

FIG. 2 is an enlarged view showing a dust removing / deodorizing filter medium according to an embodiment of the air purifying filter of the present invention.

FIG. 3 is a front view and a bottom sectional view showing another embodiment of the air purifying filter of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 dust removing / deodorizing filter material 2 antibacterial substrate 3 dust removing filter material 4 substrate supporting deodorant 5 frame

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI theme coat ゛ (Reference) A61L 9/16 A61L 9/16 DF B01D 46/10 B01D 46/10 A

Claims (2)

[Claims] 1. A collection efficiency of 0.3 μm particles at a wind speed of 5.3 cm / sec measured according to JIS-B-9908 type 1 is 99% or more, and a deodorant is contained. An air cleaning filter made by processing the dust removal and deodorization filter material into a wave shape and integrating it with an antibacterial substrate. 2. A single-faced corrugated cardboard manufactured by using the dust removing / deodorizing filter medium and the antibacterial base material as a liner in accordance with “corrugated cardboard for exterior” described in JIS-Z-1516. The air purifying filter according to claim 1, wherein: