JP2002003326A - Antimicrobial agent containing tea as component - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an antimicrobial agent capable of efficiently carrying an ingredient having a tea ingredient on a support and retaining antimicrobial action and deodorizing action for a long time. SOLUTION: This antimicrobial agent is obtained by permeating a solution or suspension obtained by dissolving or suspending tea powder and/or an extract of tea ingredients into degassed solvent into pores of porous substrate under reduced pressure and drying the solvent or the suspension.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an antibacterial agent, and more particularly to an antibacterial agent in which tea or tea extract, and further, an antibacterial metal and a photocatalyst are efficiently supported on a carrier.

[0002]

2. Description of the Related Art In recent years, various functionalities have been required for antibacterial agents due to diversification of lifestyles, and there has been an increasing demand for antibacterial properties as well as antibacterial properties for comfort and hygiene. In the current situation where the comfort and airtightness between houses have increased, appropriate temperatures and humidity are maintained even in winter, and various bacteria and molds are liable to propagate due to changes in the living environment, resulting in adverse effects. It has occurred. In hospitals, the response to so-called MRSA is very important. Furthermore, methods of solving odors and maintaining cleanliness have become more important than ever.

It has been known that tea components such as catechin, saponin, and theanine have an antibacterial effect and a deodorizing effect. Such tea components are inorganic substances such as zeolite and organic substances which impart granulation. Antibacterial agents carried on carriers such as described above are described in JP-A-10-120897.
However, in this method, the above-mentioned tea component solution or the like is simply carried on the carrier, and there is a problem that the carrying efficiency is low and the antibacterial action and the deodorant action cannot be maintained for a long time.

[0004]

SUMMARY OF THE INVENTION The present invention provides an antibacterial action,
It is an object of the present invention to provide an antibacterial agent capable of efficiently supporting a tea component having an odor preventing effect on a carrier and maintaining the antibacterial effect and the odor preventing effect for a long time. Another object of the present invention is to provide an antibacterial agent which has another component having an antibacterial action and a deodorant action carried on a carrier, and exhibits an antibacterial action and an antiodorant action in a wide range.

[0005]

Means for Solving the Problems As a result of intensive studies, the present inventors have found that when a tea component is supported on a carrier, a solution or the like of the degassed tea component is used, and the solution or the like is reduced under reduced pressure. It has been found that the object of the present invention can be achieved by supporting another component having an antibacterial action and a deodorant action on the surface of the carrier and / or in the pores of the carrier by supporting the component on the carrier. The invention has been reached.

That is, the present invention provides a method of depressurizing a solution or suspension obtained by dissolving or suspending tea powder and / or an extract of tea components in a degassed solvent through the pores of a degassed porous carrier. The gist of the present invention is an antibacterial agent (antibacterial agent 1) which has been infiltrated and dried under reduced pressure.

Further, the present invention relates to an antibacterial agent comprising an antibacterial metal ion, a metal fine particle or a metal oxide fine particle on the surface of the porous carrier and / or in the pores of the antibacterial agent 1. The agent (antibacterial agent 2) is the gist.

Further, the present invention provides an antimicrobial agent (antimicrobial agent 3) comprising a photocatalyst on the surface of the porous carrier of the antimicrobial agent 1 and / or in the pores.

Furthermore, the present invention provides an antibacterial agent 1 having, on the surface of the porous carrier and / or in the pores, antibacterial metal ions, fine particles of the metal or fine particles of an oxide of the metal, and a photocatalyst. An antimicrobial agent (antimicrobial agent 4) consisting of:

Further, the present invention relates to a solution or suspension obtained by dissolving tea powder and / or tea component extract, antibacterial metal ions, fine particles of said metal or fine particles of said metal oxide in a degassed solvent. The gist of the present invention is an antibacterial agent (antibacterial agent 5) in which the turbid suspension is permeated into the pores of the degassed porous carrier under reduced pressure and dried.

The present invention further provides an antimicrobial agent (antimicrobial agent 6) comprising a photocatalyst on the surface of the porous carrier of the antimicrobial agent 5 and / or in the pores.

The antibacterial agent 1, 2, 3, 4, 5 or 6 of the present invention is characterized in that the porous carrier is an inorganic porous carrier. Further, the antibacterial agent 2, 4, 5 or 6 of the present invention comprises:
The antibacterial metal is one or more metals selected from silver, copper and zinc. The antibacterial agent 3, 4 or 6 of the present invention is characterized in that the photocatalyst is titanium dioxide.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION The tea powder used in the present invention and / or
Alternatively, the extract of the tea component is one or two or more kinds of tea powders selected from green tea (Japanese tea, Chinese tea), black tea, bird dragon tea, black tea, white tea, etc. Or an extract of a tea component contained in the tea. It is important that the tea component contained in these teas has an antibacterial action and further has a deodorant action, and examples thereof include catechin, saponin, and theanine. The tea component extract is obtained by contacting the above-mentioned tea leaves or powder with water or a solvent such as alcohol, for example, an organic solvent such as methanol, ethanol, propanol or isopropanol, and the tea contained in the tea leaves or powder or the like. It is obtained by extracting the components, usually contains a plurality of tea components, but in the present invention, an extract containing the plurality of tea components may be used, or an extract containing the plurality of tea components Or a combination of two or more of these isolated tea components.

In the present invention, a solution or suspension obtained by dissolving or suspending the above tea powder and / or tea component extract in a degassed solvent is used. Solvents. Examples of the organic solvent include alcohols, ethers, ketones, esters, and hydrocarbons. Examples of the alcohols include methanol,
Ethanol, isopropanol, butanol, etc., as ethers, diethyl ether, dipropyl ether, etc., as ketones, acetone, methyl ethyl ketone, methyl isobutyl ketone, etc., as esters, ethyl acetate, butyl acetate, etc. Examples of the hydrocarbons include propane, butane, pentane, hexane, heptane, octane, cyclopentane, cyclohexane, cycloheptane, toluene, xylene, etc., and alcohols and ethers, particularly alcohols, are preferred. The alcohols may be hydrated like hydrated ethanol. It is advantageous that these organic solvents have a lower boiling point because removal of the tea powder and / or tea component extract from the carrier after the extract is carried on the carrier is easier.

The purpose of degassing from the above-mentioned solvent is to remove oxygen which is contained therein and inhibits the antibacterial action of tea powder and tea components. As a means, it is performed by putting the solvent in a closed vessel and reducing the pressure, but in order to perform degassing more effectively, an inert gas such as nitrogen gas was blown into the closed vessel containing the solvent to release oxygen. Thereafter, the closed container can be degassed by reducing the pressure. In addition, when water is used as a solvent, degassing can be performed using a membrane.
It is desirable to remove heavy metals, chloride ions, and the like that inhibit the antibacterial action and the like contained in water by ion exchange.

A solution of the tea powder or the tea component extract is obtained by dissolving the tea powder or the tea component extract in the degassed solvent at room temperature or under heating. A suspension of the tea powder or tea component extract can be obtained by putting the tea powder or tea component extract into the degassed solvent and stirring the mixture vigorously at room temperature or under heating. These solutions and suspensions can be further degassed in the same manner as described above in order to remove oxygen and the like that may be mixed when preparing the solutions and suspensions. The concentration of the tea powder or tea component extract in the above-mentioned solution or suspension is not specified, and may be a concentration below which tea powder or tea component extract does not precipitate, or a saturated concentration. You may.

The carrier used in the present invention is porous, and preferably has pores of several nm to several μm therein. As such a porous carrier, inorganic and organic carriers can be used. Examples of inorganic porous carriers include zeolite (synthetic and natural), silica gel, silica / alumina / magnesia, calcium phosphate (apatite), zirconium phosphate, phosphate-based ceramics, double phosphate, calcium silicate, porous glass, etc. Is mentioned. In addition, the porous glass has a property of having a uniform diameter and penetrating pores connected from the surface to the inside. The size of the inorganic porous carrier is preferably from 0.01 to 100 μm.

As the organic porous carrier, for example, those made of beads made of a synthetic resin such as an acrylic resin, a polystyrene resin, a polycarbonate resin, a polyamide resin, a phenol resin, and a melamine resin can be used.
The size is preferably from 0.1 to 100 μm. However, in the case of an antibacterial agent containing a photocatalyst, such as the antibacterial agents 3, 4 and 6 of the present invention, since the photocatalyst may degrade the synthetic resin beads, an organic porous carrier is not used. It is desirable to avoid using it.

In the case of the antibacterial agent 1 of the present invention, the porous carrier contains tea powder and / or an extract of a tea component, and in the antibacterial agent 5, it further contains antibacterial metal ions and fine particles of the metal. Alternatively, in order to hold the metal oxide fine particles in the pores of the porous carrier, a volume capable of retaining them (pore volume: Por)
e Volume (PV) is important, and the PV value is preferably 0.3 cm ³ / g or more,
More preferably, it is required to be 0.4 cm ³ / g or more.

In the present invention, it is important for the porous carrier to carry a solution or suspension in which the tea powder and / or tea component extract is dissolved or suspended in a degassed solvent. That is, the solution or suspension is made to permeate the pores of the degassed porous carrier under reduced pressure. Specifically, the porous carrier is placed in a closed container, and the pressure of the carrier is reduced by reducing the pressure. After eliminating gas such as air in the pores, the solution or suspension is supplied by pressurizing or the like, and the solution or suspension is forcibly applied to the porous carrier in a closed container under reduced pressure. This is a method of permeating into the pores of the carrier.

[0021] By the above, gas such as air existing in the pores of the porous carrier can be eliminated, and the solution or suspension can be almost completely efficiently penetrated into the pores. it can. Next, the porous carrier in which the solution or suspension has been permeated into its pores is dried to remove the solvent, whereby the tea powder and / or tea component extract of the present invention is supported. The antibacterial agent 1 can be used. Drying of the above-mentioned porous carrier may be appropriately selected within the range of 50 to 300 ° C. under normal pressure or reduced pressure. Preferred drying conditions are 50 to 2 under reduced pressure.
It is in the range of 00 ° C. The amount of the tea powder and / or tea component extract carried on the porous carrier of the antibacterial agent 1 of the present invention is 0.1 to 80% by weight, preferably 1 to 20% by weight.

The antibacterial agent 2 of the present invention has an antibacterial metal ion, a fine particle of the metal or a fine particle of an oxide of the metal on the surface of the porous carrier of the antibacterial agent 1 and / or in the pores. It is. Antibacterial metals include silver, copper and zinc, and one or more of these metals can be used. The fine particles of the antibacterial metal only need to have a size that can fit into the pores of the porous carrier, and it is possible to use those having a size of about 1 nm to 1 μm, based on the actual situation that ones having a size of about 1 nm to 1 μm are manufactured. it can. The same applies to the fine particles of the metal oxide. In addition, antimicrobial metal ions, fine particles of the metal, and fine particles of the metal oxide may be used in combination.

Various methods can be adopted as a method for retaining the antibacterial metal ions, the fine particles of the metal or the fine particles of the oxide of the metal on the surface of the porous carrier and / or in the pores. As a method for retaining the ion of the antibacterial metal, a compound of the antibacterial metal, preferably a water-soluble salt, for example, in the case of silver, silver nitrate, silver sulfate, silver acetate, silver chlorate, silver perchlorate,
A method in which a solution of silver hexafluorophosphate, silver hexafluoroborate, silver diamine sulfate, or the like is brought into contact with the surface of the porous carrier of the antibacterial agent 1 and, if necessary, washed and dried. Drying may be performed according to the method performed after the above-mentioned tea powder and / or tea component extract is carried. The contact adhesion of the solution of the compound of the antibacterial metal to the surface of the porous carrier and / or the pores of the antibacterial agent 1 is performed before the drying step of the porous carrier performed when the antibacterial agent 1 is manufactured. Can also be performed.

As a method of retaining the fine particles of the antibacterial metal, the fine particles of the metal, such as a commercially available product, are suspended in a solvent or the like used when carrying the above-mentioned tea powder and / or extract of the tea component. A method in which the suspension thus obtained is brought into contact with the surface of the porous carrier of the antibacterial agent 1 and / or in the pores, washed and dried if necessary, and a solution of the above antibacterial metal, particularly a compound of silver or copper. Contacting and adhering to the surface of the porous carrier of the antibacterial agent 1 and / or the pores thereof, and reducing this to form silver or copper metal fine particles on the surface of the porous carrier and / or within the pores. And the like. Drying at this time may be in accordance with the method performed after the above-mentioned tea powder and / or tea component extract is carried. Methods for reducing the antibacterial metal compound include a thermal decomposition method and a reducing agent reaction method. The pyrolysis method is
This is a method of heating at a temperature higher than the thermal decomposition temperature of the compound of the antibacterial metal. The reducing agent reaction method is a method in which a compound of the antibacterial metal is made to react with various reducing agents to form a metal. Examples of the reducing agent include sugars, aldehydes, hydroquinone, formic acid, oxalic acid, ascorbic acid, nitrites, divalent chromium salts, divalent iron salts, monovalent copper salts, tetravalent uranium salts, divalent vanadium salts, and sulfurous acid. Gas, nitrous acid gas and carbon monoxide sugar.

The amount of the antimicrobial metal ion, the metal fine particles or the metal oxide fine particles retained on the surface of the porous carrier and / or in the pores is 0.001 in the case of silver. -5% by weight, 0.01-1 for copper and zinc
5% by weight.

The antibacterial agent 3 according to the present invention is a porous material of the antibacterial agent 1.
Having a photocatalyst on the surface of a porous carrier and / or in the pores
It is. Various semiconductors can be used as the photocatalyst.
Sulfide semiconductor, oxide semiconductor, metal chalcogenide
And others. Cd as sulfide semiconductor
S, ZnS, In_TwoS_Three, PbS, Cu_TwoS, Mo
S_Three, WS_Three, Sb_TwoS_Three, Bi_TwoS_Three, ZnCdS_Two
For example, TiO is used as an oxide semiconductor. _Two, ZnO, WO_Three,
CdO, In_TwoO_Three, Ag_TwoO, MnO_Two, Cu_TwoO,
Fe_TwoO_Three, V_TwoO_Five, SnO_TwoEtc., metal chalcogeni
CdSe, In _TwoSe_Three, WSe_Three, HgS
e, PbSe, CdTe, etc., and GaAs,
SiSe, Cd_TwoP_Three, Zn_TwoP_ThreeEtc. can be exemplified.
Their crystal structures are not particularly limited. For these two or more
May be.

Among these photocatalysts, sulfide semiconductors and oxide semiconductors, particularly oxide semiconductors, are preferable. Among oxide semiconductors, TiO ₂ and ZnO are preferable, and they are particularly chemically and physically stable and have been used for a long time. Ti used for white pigments and cosmetics, and approved as a food additive
O ₂ (titanium dioxide) is preferred. TiO ₂ may be any of anatase type, brookite type, rutile type, amorphous type and the like, but is preferably anatase type. The photocatalyst can be used in the form of a sol or a gel, or may be used in the form of a powder. When used in powder form, the average particle size is 0.01 to 25 μm, preferably 0.05 to 1 μm.
0 μm, more preferably about 0.05 to 5 μm.
The photocatalyst can be produced, for example, by a method of forming a water-insoluble precipitate from an aqueous solution containing a metal ion corresponding to the photocatalyst, a method of preparing from a metal alkoxide, a gas phase method of oxidizing at a high temperature, or the like.

As a method for holding the photocatalyst, a suspension in which the photocatalyst is suspended in a solvent or the like used for carrying the tea powder and / or the extract of the tea component is prepared by suspending the suspension on the surface of the porous carrier of the antibacterial agent 1. And / or by spraying or applying in the pores, and after contacting and washing as required,
Drying method and the like can be mentioned. Drying at this time may be in accordance with the method performed after the above-mentioned tea powder and / or tea component extract is carried. The amount of the photocatalyst retained on the surface of the porous carrier and / or in the pores is about 0.01 to 15% by weight, preferably about 0.1 to 10% by weight, and more preferably about 0.5 to 5% by weight. .

The antibacterial agent 4 of the present invention comprises an antibacterial metal ion, fine particles of the metal or fine particles of an oxide of the metal, and a photocatalyst on the surface of the porous carrier of the antibacterial agent 1 and / or in the pores. Have The antimicrobial metal ions, the metal fine particles and the metal oxide fine particles used here may be the same as those used when preparing the antibacterial agent 2, and the photocatalyst may be used when preparing the antibacterial agent 3. It may be the same as that used for. Surface of porous carrier of antimicrobial agent 1 and / or
Alternatively, the method of holding the antibacterial metal ion, the fine particles of the metal or the fine particles of the oxide of the metal and the photocatalyst in the pores is performed by disposing the antibacterial agent 1 on the surface of the porous carrier and / or in the pores. For preparing the antibacterial agent 2 by holding the ions of the conductive metal, the fine particles of the metal or the fine particles of the oxide of the metal, or holding the photocatalyst on the surface of the porous carrier of the antibacterial agent 1 and / or in the pores The method may be performed according to the method of preparing the antibacterial agent 3,
This can be achieved by using an ion of an antibacterial metal, fine particles of the metal or fine particles of an oxide of the metal, and a photocatalyst as the substance held on the surface of the porous carrier. Antibacterial metal ions, fine particles of the metal or fine particles of the metal oxide and the photocatalyst may be used simultaneously to hold them, and the antimicrobial metal ions, fine particles of the metal or fine particles of the metal oxide may be used. One of the photocatalyst and the other may be held first, and then the rest may be held. The amount of the antibacterial metal ion, the fine particles of the metal or the fine particles of the metal oxide and the photocatalyst retained on the surface of the porous carrier and / or in the pores is determined by the amount of the antibacterial metal ion in the antibacterial agent 2, And the holding amount of the photocatalyst in the antimicrobial agent 3 may be approximately the same as the holding amount of the fine particles of the metal or the metal oxide.

In the antibacterial agent 5 of the present invention, tea powder and / or an extract of a tea component and ions of an antibacterial metal, fine particles of the metal or fine particles of an oxide of the metal are supported on pores of a porous carrier. Things. The antibacterial metal ion, the metal fine particles or the metal oxide fine particles may be the same as those used when preparing the antibacterial agent 2 or the antibacterial agent 4. Tea powder and / or
Alternatively, the extract of the tea component and the metal ion, the metal fine particles or the metal oxide fine particles may be used at the same time, and may be supported at the same time. Good, but it is efficient to use both at the same time and carry them. When the metal ions, the metal fine particles or the metal oxide fine particles are supported separately from the tea powder and / or the tea component extract, the tea powder and / or the tea component extract may be porous. What is necessary is just to follow the method of carrying on a porous carrier.

The extract of the tea powder and / or the tea component of the antibacterial agent 5 with respect to the porous carrier and the ion of the metal, the fine particles of the metal or the oxide of the metal are mixed with the tea powder for the porous carrier of the antibacterial agent 1. And / or the same amount as the amount of the extract of the tea component, and the same as the amount of the metal ion, the fine particles of the metal or the oxide of the metal on the porous carrier of the antibacterial agent 2 or the antibacterial agent 4. Is fine.

The antimicrobial agent 6 of the present invention has a photocatalyst on the surface of the porous carrier of the antimicrobial agent 5 and / or in the pores. The photocatalyst may be the same as that used when preparing the antibacterial agent 3, and the method of holding the photocatalyst on the surface of the porous carrier of the antibacterial agent 5 and / or in the pores is as follows.
The method may be performed according to the method of preparing the antibacterial agent 3 while holding the photocatalyst on the surface of the porous carrier and / or in the pores. The amount of the photocatalyst retained on the porous carrier surface and / or in the pores is
The same amount as the amount of the photocatalyst held in the antibacterial agent 3 may be used.

The antibacterial agent 1 of the present invention having the above-mentioned structure can be prepared by dissolving the tea powder and / or tea component extract in a degassed solvent when carrying the tea powder and / or tea component extract. By using a suspended suspension and supporting the solution or suspension on a degassed porous carrier, which is a method of cutting off contact with oxygen, the tea powder and / or tea being supported Deterioration of the antibacterial effect of the component extract can be prevented, and the solution or suspension is allowed to penetrate the pores of the porous carrier under reduced pressure, so that contact with oxygen is blocked and the fineness of the porous carrier is reduced. The pores can be efficiently supported without leaving voids in the pores, thereby exhibiting an effect that the antibacterial action can be maintained for a long time.

The antibacterial agent 2 of the present invention having the above-mentioned structure is characterized in that the surface of the porous carrier of the antibacterial agent 1 and / or the fine particles of the antibacterial metal, the fine particles of the metal or the fine particles of the metal oxide are formed in the pores. The antibacterial substance is an organic substance comprising tea powder and / or an extract of a tea component, and an inorganic substance comprising ions of antibacterial metal, fine particles of the metal, or fine particles of an oxide of the metal. Since the antibacterial action mechanism differs from that of the inorganic substance, the antibacterial effect of the inorganic substance not present in the antibacterial agent 1 can be expected, in addition to the above effect of the antibacterial agent 1, and the antibacterial range can be widened. Are present in the pores of the porous carrier and the other is present on the surface of the porous carrier, so that there is a difference in the antimicrobial manifestation time or the antibacterial life can be prolonged. Can be demonstrated That.

The antibacterial agent 3 of the present invention having the above structure has a photocatalyst on the surface of the porous carrier of the antibacterial agent 1 and / or in the pores. Photocatalysts include, under irradiation of light rays (eg, sunlight, fluorescent lamps, ultraviolet lamps, etc.), basic components such as ammonia and amines, acidic odor components such as acetic acid, sulfur-containing compounds such as hydrogen sulfide, formalin, acetaldehyde and the like. Many odor components such as neutral odor components can be decomposed quickly and over a long period of time to deodorize. Therefore, even a tobacco odor or the like containing many odor components can be efficiently removed. It is also effective for deodorizing aldehydes such as formalin and acetaldehyde generated from furniture and new building materials. Therefore, the antibacterial agent 3 of the present invention comprises the antibacterial agent 1
In addition to the above-mentioned effects, the present invention exerts an effect that odor components, harmful components, and the like generated from tobacco, sweat, building materials, and the like can be quickly decomposed, removed, and deodorized.

The antibacterial agent 4 of the present invention having the above-described structure is used to coat the antibacterial metal ions, the fine particles of the antibacterial metal or the oxide of the metal on the surface of the porous carrier of the antibacterial agent 1 and / or in the pores. It has fine particles and a photocatalyst. Therefore, the antibacterial agent 4 can exert a great effect that the above effects of the antibacterial agent 2 and the antibacterial agent 3 can be exhibited in addition to the above effects of the antibacterial agent 1.

The antibacterial agent 5 of the present invention having the above-described structure can be used to prepare tea powder and / or
Or an extract of the tea component and an ion of the antibacterial metal, the metal particles, or the metal oxide or the oxide of the metal, so that the same effect as the antibacterial agent 2 is exhibited. Since the fine particles of the metal oxide are supported in the pores of the porous carrier, the antibacterial action tends to be delayed in comparison with the antibacterial agent 2, but the antibacterial action can be maintained for a long time. It has the effect of being able to do it.

The antibacterial agent 6 of the present invention having the above structure has a photocatalyst on the surface of the porous carrier of the antibacterial agent 5 and / or in the pores. Therefore, in addition to the above effects of the antibacterial agent 5, the antibacterial agent 3 has the above effects.

The antimicrobial agent of the present invention is safe and harmless to the human body, does not generate harmful decomposition products to the human body, and is safe and friendly to the global environment. The antibacterial agent of the present invention is based on the antibacterial agent 1 as described above, and exhibits different superior effects thereon as described above. Can be. The antibacterial agent of the present invention is usually in the form of powder or particles, but these may be used as they are or in the form of suspension by secondary processing, and added to inorganic or polymer materials to form various molded products, foams, By using a fiber form or the like, it can be used in various fields for suppressing the propagation of microorganisms. As those fields, other than the foodstuffs field, for example, textiles, electric products, household goods in general, housing equipment,
Medical treatment and the like can be mentioned.

[0040]

According to the antibacterial agent of the present invention, a component having a tea component is efficiently carried in the pores of the porous carrier, and the antibacterial action can be maintained for a long time. Another antibacterial agent of the present invention further comprises, on the surface of the porous carrier and / or in the pores, ions of an antibacterial metal exhibiting a different antibacterial action from the tea component, fine particles of the metal, or oxidation of the metal. Has fine particles of the material,
Shows antibacterial activity in a wide range. Another antibacterial agent of the present invention further has a photocatalyst on the surface of the porous carrier and / or in the pores, and decomposes odor components and harmful components by photocatalysis under irradiation of light, deodorizes, Can be deodorized. Another antibacterial agent of the present invention further has an antibacterial metal ion, fine particles of the metal or fine particles of an oxide of the metal, and a photocatalyst on the surface of the porous carrier and / or in the pores. In addition to exhibiting an antibacterial effect in a wide range, it can deodorize and deodorize odorous and harmful components.

Further, another antibacterial agent of the present invention is a component which has a tea component in the pores of a porous carrier and an antibacterial metal ion, fine particles of the metal or fine particles of an oxide of the metal, which are efficiently carried. It can maintain a wide range of antibacterial action for a long time. Another antibacterial agent of the present invention further has a photocatalyst on the surface of the porous carrier and / or in the pores,
Odorous and harmful components can be decomposed and deodorized and deodorized by photocatalysis under light irradiation.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI theme coat ゛ (Reference) A61L 9/01 A61L 9/01 MF Term (Reference) 4C080 AA03 AA07 BB02 BB05 CC02 CC03 CC04 CC08 CC09 HH05 JJ04 KK08 LL03 MM02 MM07 MM31 NN01 NN03 NN04 NN06 4H011 AA02 BA06 BB18 BB22 DA02 DA14 DD05 DD06 DD07

Claims (7)

[Claims] 1. A solution or suspension in which tea powder and / or an extract of a tea component are dissolved in a degassed solvent is penetrated under reduced pressure into pores of a degassed porous carrier, Antibacterial agent dried. 2. The antibacterial agent according to claim 1, wherein the antibacterial agent further comprises an antibacterial metal ion, fine particles of the metal or oxidation of the metal on the surface and / or in the pores of the porous carrier. An antibacterial agent comprising substance fine particles and / or a photocatalyst. 3. A solution or suspension in which tea powder and / or tea component extract and antibacterial metal ions, fine particles of said metal or fine particles of said metal oxide are dissolved in a degassed solvent. An antibacterial agent obtained by allowing a liquid to permeate under reduced pressure into the pores of a degassed porous carrier and drying. 4. The antibacterial agent according to claim 3, further comprising a photocatalyst on the surface of the porous carrier and / or in the pores. 5. The antibacterial agent according to claim 1, wherein the porous carrier is an inorganic porous carrier. 6. The antibacterial agent according to claim 2, wherein the antibacterial metal is at least one metal selected from silver, copper, and zinc. 7. The antibacterial agent according to claim 2, wherein the photocatalyst is titanium dioxide.