JP2001000516A - Photocatalyst deodorization sheet and filter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a photocatalyst deodorization filter which is free of the degradation or loss of photocatalyst activity by the stubborn dirt of the tar of tobacco, etc. SOLUTION: The problems may be solved by the air permeable contamination preventive photocatalyst deodorization filter which sandwiches the photocatalyst by air permeable contamination preventive filters incorporated with a fluorine- base surfactant in at least one surface, the contamination preventive photocatalyst deodorization sheet which sandwiches the photocatalyst by the contamination preventive sheets incorporated with the fluorine-base surfactant in at least both surfaces, the photocatalyst deodorization sheet containing the photocatalyst in or on a base or the laminated photocatalyst deodorization sheet or filter formed by bonding the air permeable filters containing the fluorine-base surfactant to at least one surface.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a photocatalytic deodorizing filter in which a photocatalyst is sandwiched by at least one surface of a photoconductive catalyst containing a fluorine-containing surfactant.

[0002]

2. Description of the Related Art Conventionally, odors caused by industrial odors in factories and the like, and odors caused by wastes in service industries such as restaurants and hotels that discharge a large amount of waste have been problems. In addition, odors in daily living spaces such as in automobiles and in general rooms have also been highlighted. Therefore, there is an increasing need for the removal of harmful substances such as odors, and air purifiers and air conditioners incorporating a odor removal device, a odor removal filter, and the like are being actively developed.

[0003] In general air purifiers and air conditioners, a filter containing activated carbon is used, and a method of adsorbing harmful substances such as odors to the activated carbon is employed. However, activated carbon only exhibits an adsorption effect on most harmful substances, and when a certain amount of harmful substances is adsorbed, the filter must be replaced. Alternatively, there is a problem that the harmful substance once adsorbed is easily released due to a rise in ambient temperature or a decrease in the concentration of the harmful substance.

In recent years, in order to solve such a problem,
Materials using a catalyst capable of decomposing harmful substances, or materials combining a photocatalyst and an adsorbent such as activated carbon have been developed. For example, Japanese Patent Application Laid-Open No. 1-234729 discloses an air purifier incorporating a deodorant obtained by forming a layer of titanium dioxide having photocatalytic ability on the surface of honeycomb activated carbon. The air purifier is equipped with an ultraviolet lamp, and irradiates the deodorant with ultraviolet light to decompose and remove harmful substances adsorbed on activated carbon by the photocatalytic action of titanium dioxide.

Japanese Unexamined Patent Publication (Kokai) No. 4-256755 discloses a material capable of decomposing and removing various harmful substances such as a photocatalyst removing material made of granular pulp carrying a photocatalyst such as titanium dioxide.

However, deodorizing filters and sheets using a photocatalyst cannot be used to decompose stains due to the photocatalytic ability alone because the filter is soiled by cigarette smoke or tar components. However, there was a problem that the photocatalytic activity was completely lost.

[0007]

DISCLOSURE OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has a feature that at least one surface of the photocatalyst is sandwiched by a gas-permeable pollution prevention filter containing a fluorine-based surfactant. It is an object of the present invention to provide a photocatalytic deodorizing filter that does not reduce or lose its photocatalytic activity ability due to stubborn dirt such as cigarette tar by the air permeable pollution preventing photocatalytic deodorizing filter.

[0008]

Means for Solving the Problems The present inventors have conducted intensive studies in order to solve the above-mentioned problems, and as a result, have found that at least one surface of the photocatalyst is sandwiched by a gas-permeable pollution prevention filter containing a fluorine-based surfactant. It has been found that this can be achieved with the characteristic air permeable pollution prevention photocatalytic deodorizing filter.

The present invention can also be achieved by a pollution preventing photocatalyst deodorizing sheet characterized in that a photocatalyst is sandwiched by a pollution preventing sheet containing a fluorine-based surfactant on at least both sides.

Further, a laminated photocatalyst deodorizing sheet characterized in that a photocatalyst deodorizing sheet containing a photocatalyst inside or on the surface of a support or a gas-permeable filter containing a fluorine-based surfactant is attached to at least one surface of the filter. Or it can be achieved with a filter.

That is, the present invention is as described below.

[0012] A photocatalytic deodorizing filter, wherein a photocatalyst is sandwiched between at least one surface of the filter by a gas-permeable pollution preventing filter containing a fluorine-based surfactant. (Claim 1)

A photocatalytic deodorizing sheet, wherein at least both sides of the photocatalyst are sandwiched between antifouling sheets containing a fluorine-based surfactant. (Claim 2)

A laminated photocatalyst deodorizing sheet or filter comprising a photocatalyst deodorizing sheet or filter containing a photocatalyst inside or on the surface of a support and a gas permeable filter containing a fluorine-based surfactant bonded to at least one surface of the filter. Claim 3).

A photocatalytic deodorizing corrugated filter comprising the sheet according to claim 2 or 3 (claim 4).

An air purifier using the photocatalyst deodorizing sheet, filter or corrugated filter according to any one of claims 1 to 4.

Hereinafter, the present invention will be described in detail.

The filter in the present invention basically indicates a gas-permeable filter. Further, the sheet of the present invention alone has poor air permeability for use as a filter.

As a result of intensive studies, it was found that the photocatalyst in the air permeable pollution preventing photocatalyst deodorizing filter was characterized in that the photocatalyst was sandwiched on at least one side by a gas permeable surfactant containing a fluorine-containing surfactant. It was found that the photocatalytic activity ability was maintained without being stained.

In the present invention, ordinary photocatalytic deodorizing sheets and filters are used in combination with a dust removing function.
Various dust removal functions alone cannot sufficiently remove the tar of cigarettes, and the photocatalytic deodorizing sheet or filter is usually stained with tar.

In the present invention, a photocatalyst is sandwiched between at least one surface by a gas-permeable pollution preventing filter containing a fluorine-based surfactant, and the photocatalyst is stained by cigarette dust. The photocatalytic activity can be maintained with almost no occurrence.

In the present invention, the fluorine component of the fluorine-based surfactant is a substance having the lowest surface tension repelling water and oil, and the photocatalyst is sandwiched between air-permeable pollution preventing filters containing this substance uniformly. It was found that the above problem could be solved.

In the present invention, a small amount of a fluorine-based surfactant exerts a water / oil repellent effect. In particular, the fluorine component easily comes out to the surface, and effectively makes the surface of the substrate hard to be stained.

Further, in the present invention, a photocatalyst filter which can maintain the photocatalytic activity of the photocatalyst more effectively by sandwiching the photocatalyst on at least one side with a gas-permeable pollution preventing filter containing a fluorine-containing surfactant. Was found.

In the present invention, a sheet that can be used as a filter while maintaining photocatalytic activity can be used even with a contamination-preventing photocatalyst deodorizing sheet characterized in that a photocatalyst is sandwiched by a contamination-preventing sheet containing a fluorine-based surfactant on at least both sides. Was found. Since the sheet itself does not have much air permeability, it is processed into a corrugated filter or high cam filter for use.
It is suitable that both surfaces are sandwiched between antifouling sheets containing a fluorine-based surfactant.

In the present invention, a photocatalytic deodorizing sheet containing a photocatalyst inside or on the surface of a support or a gas permeable filter containing a fluorosurfactant is bonded to at least one surface of the filter. The sheet or filter is attached to the air-permeable filter separately from the photocatalytic deodorizing sheet or the filter body, which contains a fluorine-based surfactant.
Combined with the dust removing effect of the filter, the photocatalyst is less likely to be contaminated.

According to the present invention, by assembling the corrugate using the sheet of claim 2 or 3, the photocatalyst is less likely to be contaminated and a corrugated filter having a low pressure loss can be provided. Further, an air purifier using the above-described sheet or filter can provide an effective air purifier capable of maintaining the performance of the photocatalyst for a long time.

[0028]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention provides a photocatalytic deodorizing filter in which a photocatalyst is sandwiched between at least one surface by a gas-permeable contamination-preventing filter containing a fluorine-based surfactant.

There is provided a pollution control photocatalyst deodorizing sheet characterized in that a photocatalyst is sandwiched by a pollution control sheet containing a fluorine-containing surfactant on at least both sides.

Further, a photocatalytic deodorizing sheet containing a photocatalyst inside or on the surface of the support or a laminated photocatalytic deodorizing sheet characterized by adhering a permeable filter containing a fluorine-based surfactant to at least one surface of the filter. Provide a filter.

In the present invention, the photocatalytic deodorization for preventing air-permeable pollution is performed.
The photocatalyst used in the filter is 0.5 to 5 eV,
Preferably, a photocatalytic reaction having a band gap of 1 to 3 eV is performed.
The resulting semiconductor, OH radical generated by photoexcitation
Decomposes harmful substances. As the shape of the photocatalyst,
Particles are preferred, and the specific surface area is 10 to 500 m ^Two/
g particles are appropriately selected and used.

[0032] Such a photocatalyst is disclosed in
No. 73514 can be cited, and metal oxides such as zinc oxide, tungsten trioxide, titanium oxide, and cerium oxide are preferable. Among these, titanium oxide has structural stability and photocatalyst. It is a particularly preferable material in consideration of its ability as a material, safety in handling, and the like. As titanium oxide, in addition to titanium dioxide, hydrous titanium oxide, hydrated titanium oxide, metatitanic acid, orthotitanic acid, titanium hydroxide and the like can be used, and the crystal form is not particularly limited.
When using titanium oxide, its specific surface area is 50 to 4
A thing of 00 m ² / g is preferred. Further, the surface of titanium oxide may be coated with a metal such as platinum, gold, silver, palladium, rhodium and ruthenium, or a metal oxide such as ruthenium oxide and nickel oxide.

In the photocatalytic deodorizing filter of the present invention, it is preferable to use a photocatalyst and a deodorant in combination. Examples of the deodorant include activated carbon, impregnated activated carbon, coconut shell activated carbon, zeolite, high silica zeolite, and the like, manganese dioxide, catalytic metal oxides such as iron dioxide, platinum,
Noble metal catalyst deodorants such as platinum may be used, and mixtures thereof may also be used. Above all, a physical adsorption type deodorant is preferably used. The shape of these deodorants is not particularly limited, but in consideration of the combined use with a photocatalyst, particularly anatase-type powdered titanium dioxide, particles are preferable, and those having a specific surface area of 50 to 2,000 m ² / g. Is preferably selected and used. For example, in the case of activated carbon, those of 500 to 1500 m ² / g are preferred.

In the present invention, when a photocatalyst and a deodorant are used together, it is preferable to form an aggregated composite of both. The photocatalyst does not directly contact the supporting substrate due to the aggregated composite. As a method for obtaining a breathable pollution preventing photocatalytic deodorizing filter characterized by sandwiching a photocatalyst, a method of obtaining the agglomerated composite with a breathable filter such as a nonwoven fabric composed of synthetic fibers or pulp impregnated with a fluorine-based surfactant is used. A method of pinching is preferably used. The methods are listed below.

First, a photocatalyst, a deodorant and, if necessary, a carrier are added and mixed in water. When using fine fibers, they are also added to water at this stage. Then, using a suitable flocculant, form an aggregated composite of the photocatalyst and the deodorant (carrier and fine fibers), or dry it in a granular form, or mix it with a suitable binder and bond it during coating / drying. Adjust to have strength.

As the coagulant, a cationic polymer coagulant, for example, cationic polyacrylamide, polyaluminum chloride and the like can be used. Preferably, inorganic polyaluminum chloride or the like is used. The amount of the coagulant to be added depends on the type and amount of the photocatalyst, carrier, deodorant, and fine fibers used.

Further, an anionic polymer coagulant which forms a complex with these cationic polymer coagulants and enhances coagulation, such as anionic polyacrylamide, or anionic inorganic fine particles such as colloidal silica And an aqueous dispersion of bentonite can also be used in combination.

In the present invention, the agglomerated complex can be held as a gas-permeable pollution preventing filter containing a fluorine-based surfactant used for a gas-permeable pollution preventing photocatalyst deodorizing filter characterized by sandwiching a photocatalyst. Any one can be used. Preferably, the substrate is not decomposed by the photocatalytic reaction, but it is necessary to select the substrate in consideration of the workability after forming the photocatalytic deodorizing filter, and a nonwoven fabric is one of the preferable substrates.

In the present invention, the photocatalytic deodorizing filter for preventing air-permeable contamination has to have air-permeability for passing odorous substances and light-transmitting property for activating the photocatalyst. Examples of the form of such a substrate include a nonwoven fabric and a porous film. A nonwoven fabric is a particularly preferred substrate because it is easy to control the basis weight and air permeability and is excellent in workability.

Nonwoven fabrics which can be preferably used in the present invention include polyamide fibers, polyester fibers, polyalkylene paraoxybenzoate fibers, polyurethane fibers, polyvinyl alcohol fibers, polyvinylidene chloride fibers, polyvinyl chloride fibers, and polyacrylonitrile. -Based fibers, polyolefin-based fibers, synthetic fibers such as phenol-based fibers, glass fibers, metal fibers, alumina fibers,
Inorganic fiber such as activated carbon fiber, wood pulp, hemp pulp,
It is produced by various methods using natural fibers such as cotton linter pulp, regenerated fibers, or fibers obtained by imparting functions such as hydrophilicity and flame retardancy to these fibers.

The method for producing the nonwoven fabric is not particularly limited, and a web obtained by a dry method, a wet papermaking method, a melt blown method, a spunbond method, or the like may be subjected to a water jet method, a needle punch method, a stitch method, or the like, depending on the purpose and application. It can be produced by appropriately combining a physical method such as a bonding method, a bonding method using heat such as a thermal bonding method, or a method using a bonding agent such as a resin bond to develop strength.

In the present invention, as a method for producing a photocatalytic deodorizing filter for preventing air-permeable pollution, a gas-permeable filter containing at least one of a fluorine-containing surfactant is used, and the composite aggregate is interposed on one of the substrates. After that, a method of bonding the whole surface using a heating roll, a method of partially bonding using an embossing roll, a method of treating in a high temperature atmosphere, ultrasonic melting, laser melting, high frequency melting And the like, and a photocatalytic deodorizing filter can be manufactured alone or in combination.

In the present invention, a pollution control photocatalyst deodorizing sheet characterized in that a photocatalyst is sandwiched by a pollution control sheet containing a fluorine-based surfactant on at least both sides can be obtained by the following method.

It can be obtained in the same manner as in the production of the air-permeable pollution preventing photocatalyst filter. However, since a pollution control sheet containing a fluorine-based surfactant basically has poor air permeability, a sheet in which a photocatalyst is sandwiched between the pollution control sheets on both sides is obtained and processed into a corrugated filter or high cam filter. It is preferable to use them.

In the present invention, a photocatalytic deodorizing sheet containing a photocatalyst inside or on the surface of a support or a gas permeable filter containing a fluorine-based surfactant is attached to at least one surface of the filter. The sheet or filter can be obtained by the following method.

That is, an aggregate obtained by sandwiching the aggregate with a support such as a nonwoven fabric, a product obtained by a method of producing a wet nonwoven fabric by mixing the aqueous dispersion of the aggregate composite with a synthetic fiber or pulp, It can be obtained by laminating one side of a photocatalyst deodorizing sheet obtained by applying the aggregate on a support with a binder or the like to a nonwoven fabric or the like containing a fluorine-based surfactant.

In the present invention, various fluorine surfactants can be preferably used. For example, anionic, cationic, nonionic, and betaine-based fluorosurfactants can be preferably used.

In the present invention, the amount of the fluorosurfactant used is 5 to 5% for the photocatalytic deodorizing filter or sheet.
An addition amount of 0.01% by weight is preferred.

In the photocatalytic deodorizing corrugate of the present invention, the sheet according to claim 2 or 3 can be corrugated to increase the surface area and increase the air permeability. Therefore, the photocatalytic deodorizing performance was further improved.

Further, an air purifier using the photocatalyst deodorizing sheet, filter or corrugated filter according to any one of claims 1 to 4 can be used as a photocatalytic air purifier by mounting a sufficient ultraviolet lamp. Function.

[0051]

EXAMPLES The present invention will be specifically described below with reference to examples, but the present invention is not limited to these examples.

(1) Preparation of Aggregate Composite Titanium dioxide powder (produced by Nippon Aerosil Co., Ltd.)
P25S6) 100 parts by weight, high silica zeolite (HSZ-690HOA, manufactured by Tosoh Corporation), composite ferrosilicate powder (Mizukanite AP, manufactured by Mizusawa Chemical Industry Co., Ltd.) 5
After adding and mixing 0 parts by weight in water, 5 parts of polyaluminum chloride (PAC, manufactured by Mizusawa Chemical Industry Co., Ltd.) was used as a coagulant.
Parts by weight, titanium dioxide, high silica zeolite,
An aggregated complex of complex ferrosilicate was formed. The aggregate was filtered, dried, and pulverized to prepare an aggregate.

(2) Preparation of Nonwoven Fabric 70% by weight of polyester fiber (Visilon, fineness 0.15 denier, fiber length 7.5 mm, manufactured by Asahi Kasei Corporation), polyester fiber (Tetron, fineness 1.5 denier, manufactured by Teijin Limited) fiber length 20 mm) was added to and mixed with 30% by weight in water to prepare an aqueous slurry, and paper making the basis weight of 60 g / m ² web using a cylinder paper machine from the aqueous slurry. Next, the web was loaded on a porous support made of a 100-mesh stainless steel wire, and a high-pressure columnar water flow of 100 kg / cm ² was jetted to entangle the fibers and dried with an air dryer to obtain a nonwoven fabric.

(3) Preparation of a permeable contamination prevention filter containing a fluorine-based surfactant Surflon 113 (manufactured by Asahi Glass) as a fluorine-based surfactant was added to a breathable nonwoven fabric FL50 (manufactured by Kurashiki Textile Co., Ltd.) as an acrylic emulsion. Impregnation coating was carried out with the system binder so as to be 3% by weight with respect to the nonwoven fabric, to obtain a gas-permeable contamination preventing filter.

(4) Preparation of antifouling sheet containing fluorine-based surfactant Next, surflon 113 (made by Asahi Glass) as a fluorine-based surfactant was added to the nonwoven fabric described in (2) above together with an acrylic emulsion-based binder. The coating was impregnated so as to have a concentration of 3% by weight to obtain a contamination prevention sheet.

(5) Preparation of a photocatalytic deodorizing filter for preventing air-permeable contamination On the air-permeable nonwoven fabric FL50, the aggregate obtained in the above (1) and a vinyl acetate resin granule as a binder were added to the aggregate. 5% by weight. Furthermore, after further laminating the air-permeable pollution prevention filter according to the above (3) on the agglomerated composite volume mounting substrate,
It was pressurized with an embossing roll heated to 160 ° C. to obtain an air pollution preventing photocatalytic deodorizing filter having an aggregated composite content of 100 g / m ² .

(6) Preparation of air-permeable photocatalyst deodorizing filter On the air-permeable nonwoven fabric FL50, the aggregated composite obtained in the above (1) and granules of a vinyl acetate resin as a binder were added to the aggregated composite for 5 minutes. % By weight is loaded. Further, the air-permeable nonwoven fabric FL50 is further similarly laminated on the agglomerated composite volume-loading base material, and then pressurized with an emboss roll heated to 160 ° C. to obtain an agglomerated composite content of 100 g / g.
m ² air-permeable photocatalytic deodorizing filter.

(7) Preparation of a Pollution Prevention Photocatalyst Deodorizing Sheet On the contamination prevention sheet described in (4) above, the agglomerated composite obtained in (1) above and a vinyl acetate resin granule as a binder were mixed with the agglomerated composite. A mixture of 5% by weight of the body is loaded. Further, after the antifouling filter of the above (4) is further laminated on the agglomerated composite volume mounting base material,
The mixture was pressurized with an embossing roll heated to 0 ° C. to obtain a pollution control photocatalytic deodorizing filter having an aggregated composite content of 100 g / m ² .

(8) Preparation of Photocatalytic Deodorizing Sheet 1 Core-sheath type heat-fusible polyester fiber (# 4 manufactured by Unitika Ltd.)
080, fineness 2 denier, fiber length 5 mm) 55% by weight,
40% by weight of polyester fiber (manufactured by Teijin, Tepyrus, 0.5 denier fineness, fiber length 5mm) and 5% by weight of softwood bleached kraft pulp (Canada standard freeness 480mL) are added and mixed in water to prepare an aqueous dispersion. did. Next, a 50% by weight aqueous slurry of the aggregate composite aqueous dispersion described above with respect to the fiber content was prepared. From the aqueous slurry, a photocatalytic deodorizing sheet 1 having a basis weight of 100 g / m ² was obtained using a round paper machine.

(9) Preparation of Photocatalyst Deodorizing Sheet 2 The nonwoven fabric described in (2) above is combined with the aggregated composite obtained in (1) above and a vinyl acetate resin granule as a binder with respect to the aggregated composite. % By weight is loaded.
Furthermore, after the nonwoven fabric of the above (2) was further laminated on the aggregate composite volume-loading base material, pressure was applied with an embossing roll heated to 160 ° C. to obtain a photocatalytic deodorizing filter 2 having an aggregate composite content of 100 g / m ² . .

Example 1 Size 300 (vertical) × 280 (horizontal) × 20 using the photocatalytic deodorizing filter obtained in (5) above.
Pleating was performed in the vertical direction at a (width) mm and a pitch size of 5.0 mm to produce a pleated filter having 60 peaks, which was used as Example 1.

Example 2 Using the pollution control photocatalytic deodorizing sheet obtained in the above (7), a size of 300 (length) × 280 (width) × 10 (width) mm,
Example 2 A corrugated filter having a pitch size of 5.0 mm and a height of 3.0 mm was manufactured as Example 2.

Example 3 The gas permeable photocatalyst deodorizing filter obtained in the above (6) and the gas permeable contamination preventing filter obtained in the above (3) are pressed together with an embossing roll heated to 160 ° C. and bonded together. Using this filter, size 300 (length) x 280 (width) x
A pleated filter having 20 (width) mm and a pitch size of 5.0 mm was formed in the longitudinal direction to produce a pleated filter having 60 peaks.

Example 4 The photocatalyst deodorizing sheet 1 obtained in the above (8) is bonded to both surfaces of the photocatalytic deodorizing filter obtained in the above (3) by applying pressure to the photocatalyst deodorizing filter obtained by the above (3) using an embossing roll heated to 160 ° C. Using this filter, size 300 (vertical) x 280
A corrugated filter having (width) × 10 (width) mm, a pitch size of 5.0 mm, and a height of 3.0 mm was prepared as Example 4.

Comparative Example 1 Size 300 (length) × 280 (width) × 20 (width) m using the air-permeable photocatalytic deodorizing filter obtained in the above (6).
m, pitch size 5.0 mm, pleated in the vertical direction to produce a pleated filter with 60 peaks, and Comparative Example 1
And

Comparative Example 2 Using the photocatalyst deodorizing sheet 2 obtained in the above (9), a sheet having a size of 300 (length) × 280 (width) × 10 (width) mm, a pitch size of 5.0 mm and a height of 3.0 mm was used. A corrugated filter was manufactured to be Comparative Example 2.

Comparative Example 3 The gas permeable photocatalyst deodorizing filter obtained in the above (6) and the gas permeable nonwoven fabric FL50 were pressed together with an embossing roll heated to 160 ° C. and bonded. This filter was pleated in the vertical direction with a size of 300 (length) x 280 (width) x 20 (width) mm and a pitch size of 5.0 mm, and the number of peaks was 6
A pleated filter of No. 0 was produced to make Comparative Example 3.

Comparative Example 4 The air-permeable nonwoven fabric F was added to the photocatalyst deodorizing sheet 1 obtained in the above (8).
L50 is pressed with an embossing roll heated to 160 ° C. and bonded to both sides. Size 300 using this sheet
Comparative Example 4 was prepared by producing a corrugated filter having (vertical) × 280 (horizontal) × 10 (width) mm, a pitch size of 5.0 mm, and a height of 3.0 mm.

<Installation of Photocatalyst Deodorizing Filter in Air Purifier> The photocatalytic deodorizing filters produced in Examples 1 to 4 and Comparative Examples 1 to 4 were replaced with a new fresh air filter (Photocatalyst air purifier manufactured by Mitsubishi Paper Mills, Ltd.). ) The photocatalyst filter was removed, and the dust filter and the photocatalyst deodorizing filter were installed in the prefilter installation portion. The size of the photocatalyst deodorizing filter produced in the example and the comparative example fits perfectly in the housing frame of the new and fresh air blower. In particular, the pleated filters of Examples 1 and 3 were installed such that the air-permeable non-woven filter was air-permeable, and the pleated filter of Comparative Example 3 was installed such that the air-permeable nonwoven fabric was upwind. In addition, the current new and fresh air blowers have a distance from the UV lamp installation section to the pre-filter section, so two UV lamps were installed downstream of the photocatalytic deodorizing filter.

<Evaluation of the Deodorizing Performance of the Photocatalytic Deodorizing Filter> Using a new and fresh air blower incorporating the deodorizing filters of Examples 1 to 4 and Comparative Examples 1 to 4 as described above, a household of Japanese Electric Industry Standard JEM1467 was used. The deodorizing performance was evaluated according to the deodorizing performance test of the air cleaner for use. At this time, drive by turning on the ultraviolet lamp newly installed in the new wind fan,
The practical deodorizing performance was evaluated. The results are shown in Table 1.

[0071]

[Table 1]

[0072]

According to the evaluation of the deodorizing performance of the cigarette, it can be seen that the deodorizing performance is maintained without soiling the tar and the like.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI theme coat ゛ (Reference) B01J 35/02 B01D 53/36 ZABJ F-term (Reference) 4C080 AA07 BB02 JJ03 JJ06 KK08 LL13 MM02 4D019 AA01 BB03 BB05 BB10 BC07 BC13 BC20 CA02 4D048 AA22 AB01 AB03 BA07X BA16Y BA19Y BA27Y BA30Y BA31Y BA32Y BA33Y BA34Y BB08 BC04 BC05 CA06 CC40 CC41 CD05 EA01 4G069 AA03 BA04A BA04B BA48A CA01 CA10 CA17 DA06 EA10 EC05Y EC03Y

Claims (5)

[Claims] A photocatalytic deodorizing filter, wherein a photocatalyst is sandwiched between at least one surface of the filter by a gas-permeable pollution preventing filter containing a fluorine-containing surfactant. 2. A decontamination sheet for photocatalyst, wherein a photocatalyst is sandwiched by a contamination prevention sheet containing a fluorine-based surfactant on at least both sides. 3. A laminated photocatalyst deodorizing sheet characterized in that a photocatalyst deodorizing sheet containing a photocatalyst inside or on the surface of a support or a gas-permeable filter containing a fluorine-based surfactant is attached to at least one surface of the filter. filter. 4. A photocatalytic deodorizing corrugated filter comprising the sheet according to claim 2. 5. The photocatalyst deodorizing sheet according to claim 1, wherein
An air purifier characterized by using a filter or a corrugated filter.