JP2002068865A - Tile material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tile material having high versatility by additionally developing the photocatalyst described above and more specifically to provide the tile material which has high wear strength because of the molten film of ceramics and prevents its base material from being attacked even if the activity intensity of the photocatalyst is enhanced in spite of a non-binder. SOLUTION: The tile material formed by adhering a photocatalyst function body consisting of at least photosemiconductor powder on the ceramic base material is provided. The photocatalyst function body does not use the binder and is therefore easily adhered to the base material by a thermal spraying method.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a tile material having an antibacterial and deodorant effect of a so-called photocatalyst. More specifically, the present invention relates to tiles used for floors and walls of inner walls of baths, water spaces in urban spaces, water tanks and pools, food factories and the like.

[0002]

2. Description of the Related Art A photocatalyst has excellent bactericidal properties and decomposability of organic substances. In recent years, the properties of the photocatalyst have attracted much attention, and application development is currently being actively pursued.

The applicant of the present invention sprays a mixture containing an optical semiconductor ceramic, a metal powder, and an adsorbent such as apatite on a substrate as a photocatalyst for decomposing bacteria, viruses, harmful substances, etc. in our living environment. A photocatalyst functional body is disclosed in JP-A-6-254139. Furthermore,
Japanese Patent Application Laid-Open No. 10-17847 discloses a photocatalyst utilizing such a photocatalyst as a printing ink and a paint.

Here, the mechanism by which the photocatalyst decomposes organic substances (including bacteria) is described as follows: When light is applied to an optical semiconductor ceramic in the presence of water, water is decomposed on its surface to generate OH radicals. The OH radical is very active, so organic matter near the photocatalyst (bacteria, dirt, smell)
Reacts and decomposes immediately. " The photocatalyst can be used in combination with another substance such as ozone, ultraviolet light, hydrogen peroxide or the like to increase OH radicals, thereby increasing the activity intensity of the photocatalyst. The photocatalyst having a high activity intensity is useful when managing sanitation such as a food factory or a water place.

[0005] However, the high activity intensity of the photocatalyst means that the base material to which the photocatalyst is attached or the binder resin used as a bonding agent is also decomposed. Decomposability, etc.), there is a new problem that the continuation life of the product itself is short.

[0006]

SUMMARY OF THE INVENTION The object of the present invention is to further develop the above-mentioned photocatalyst and make it more versatile. Specifically, since the present invention is a fused film of ceramics, it has high wear strength. It is another object of the present invention to provide a tile material that does not attack the base material even when the activity strength of the photocatalyst is increased while being a non-binder.

[0007]

In order to achieve the above object, the present invention is characterized in that, in claim 1, a photocatalyst functional body made of at least an optical semiconductor powder is attached to a ceramic substrate. To provide tile materials.

[0008] By forming the tile material using the base material as a kind of ceramics, the ceramics are inorganic and are not decomposed into OH radicals generated from the photocatalyst.
Therefore, even if the activity intensity of the photocatalyst is increased, the base material itself is not attacked.

[0009] The tile material is used for floors and walls of inner walls of baths, water places in urban spaces, water tanks and pools, food factories, and the like.
This is because it can be installed in any place such as a ceramic bioreactor, and the size and shape of the tile can be arbitrarily formed.

Further, in the invention described in claim 1, it is preferable that the photocatalyst functional body is attached by a thermal spraying method, as described in claim 2.

As a method for attaching the photocatalyst functional body on the base material, there are a method of applying as a paint other than the thermal spraying method,
There is a method of printing by containing it in ink. However, in the method of applying as a paint or the method of printing by containing in ink, a binder is often used to assist film formation or dispersion of the paint or ink, and the binder is an organic substance. It may be decomposed by the photocatalyst. Therefore, in order to prevent the binder from being decomposed, it is necessary to lower the performance of the photocatalyst functional body itself. On the other hand, in the case of the thermal spraying method, since the photocatalyst functional body can be directly adhered to the tile as the base material without using a binder, the performance of the photocatalyst functional body can be sufficiently exhibited. .

When a titanium oxide film is formed on a substrate without a binder, a sol-gel method is usually used. However, this method can form only a thin film, and causes a problem in film strength. In many cases, since the thermal spraying method is used in the present invention, it is possible to form a thin film having a high coating strength on a substrate.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The tile material of the present invention will be specifically described below.

FIG. 1 is a schematic sectional view showing the structure of the tile material of the present invention. The photocatalytic function body 2 shown in FIG. 1 is adhered on a ceramic (ceramic) 1 as a base material, and includes an optical semiconductor powder 2a and fine particles 2 serving as an electrode.
b and the adsorbent material 3.

[1] Substrate The present invention is characterized in that the substrate 1 is a ceramic. When the substrate 1 is made of ceramics, even if the photocatalyst function body attached on the substrate is irradiated with light to generate OH radicals, the substrate itself remains O
Because it is not attacked by H radicals, it does not break down and become ragged.

The substrate 1 used for the tile material of the present invention is not particularly limited as long as it is a ceramic, and any ceramic can be used. Here, the ceramics generally means ceramics, but is broadly used to include cement, glass, bricks and the like. In the present invention, it means all ceramics that can be widely used as a tile material, and is used as a general term for non-metallic inorganic materials obtained through steps such as molding and firing. In addition, we have developed the conventional ceramics manufacturing method and applied “New ceramics” and “Fine ceramics” applied to materials other than silicates. It is possible to make it.

[2] Photocatalyst Function Body The photo-semiconductor powder 2a constituting the photocatalyst function body 2 includes:
In addition to TiO ₂ , CdS, CdSe, WO ₃ , Fe ₂ O ₃ , S
rTiO ₃ , KNbO _{3 and the} like can be mentioned. Among them, TiO ₂ is chemically stable without being attacked by most acids, bases and organic solvents, and it has been confirmed by animal experiments that TiO ₂ does not cause toxicity and has no carcinogenicity. Therefore, TiO ₂ is most preferable from such a point.

Further, as the fine particles 2b as the electrode, metal fine particles are usually used in many cases. As the metal fine particles forming the electrode, various metal fine particles such as gold, platinum, and copper can be used in addition to silver. Moisture is required as one of the indispensable elements for the photocatalyst to perform its original function, and the metal fine particles forming the electrode must be stable without change over time in the presence of water. Of the metal fine particles, platinum is most preferred,
In consideration of economy, silver is preferable because it has the above characteristics, is non-toxic and has germicidal properties.

The electrode used may be silicon fine particles instead of metal. By using silicon instead of metal, the photocatalyst functional body itself becomes inexpensive, and when using the photocatalyst treated body in water, `` the ions contained in water react with the metal as an electrode. The photocatalytic function is reduced ".

In addition to silicon, carbon and the like (group 4) which are the same as silicon in the periodic table can be used as an electrode because they have similar properties to silicon.

Here, the electrodes are not always necessary for the photocatalytic function body of the present invention. When TiO ₂ is used as an optical semiconductor powder, the crystal structure of TiO ₂ includes an anatase type and a rutile type, and the anatase type has a photocatalytic function. The electrodes serve to help the photosemiconductor powder decompose organic substances, etc., but when a large amount of anatase-type TiO ₂ is present in the photocatalytic functional body,
This is because TiO ₂ alone has a sufficient photocatalytic function and does not require fine particles serving as electrodes.

Adsorption material 3 constituting the photocatalyst functional body
Is used to adsorb and hold objects to be treated such as bacteria, viruses, molds, malodorous substances and harmful substances. Examples of such adsorbing materials include one or more selected from the group consisting of ceramic powders such as apatite (apatite), zeolite or sepiolite, activated carbon, and silk fiber-containing materials. They can be used in combination. Here, as the apatite, hydroxyapatite [Ca ₁₀ (PO ₄ ) _6, which selectively adsorbs proteins such as bacteria, viruses and molds, is used.
(OH) ₂ ] is preferred. Examples of the silk fiber-containing material include, in addition to the silk fiber powder, a granulated material, a gel material, and the like. The particle size of these adsorbing materials (when the silk fiber-containing material is powder) is not less than 0.001 to 1.0 in view of securing a larger surface area and considering good workability of application.
μm is preferable, and particularly preferably 0.01 to 0.05 μm. The mixing ratio of the optical semiconductor powder and the adsorbing material is preferably 1 to 50 parts by weight, more preferably 10 to 30 parts by weight, based on 100 parts by weight of the optical semiconductor powder.

Here, the adsorbing material is not always necessary for the photocatalytic function body. When the photocatalyst function body is adhered to the base material by thermal spraying, the adsorbing material is used for adsorbing and holding an object to be treated such as a malodorous substance and a harmful substance, and the photocatalytic function of the optical semiconductor powder (TiO ₂ ) is used. This is because it is for assisting.

However, when a coating material is used for dipping or the like of the photocatalytic functional body, it is preferable to use an adsorbing material in order to prevent the photocatalytic functional body from decomposing the binder contained in the coating material.

[3] Method of Attaching Photocatalyst Function Body Next, a method of attaching the photocatalyst function body 2 to a ceramic as a base material will be described.

The photocatalyst functional body may be attached to a substrate without a binder by using thermal spraying, or may be attached to the substrate as a paint containing a binder.

FIG. 1 shows a state in which a photocatalyst is adhered to the surface of a base material by thermal spraying. For example, fine particles (5 to 50 μm) of titanium oxide (TiO ₂ ) having a melting point of 2000 ° C. or less are formed on the base material 1. ) And metal fine particles of 1 to 10 μm by gas spraying using oxygen, acetylene, etc.
It is obtained by spraying ceramics melted at 900 to 3000 ° C. In the sprayed state, the photocatalyst particles 2 are composed of titanium oxide particles 2a acting as one electrode and metal particles, for example silver particles 2b, acting as the other electrode carried on the titanium oxide particles 2a. The photocatalyst particles 2 form an electrochemical cell, and after thermal spraying, become flat laminated particles of 30 to 40 μ, and adhere to the base material by the anchor effect while being melted by the high temperature of the gas. In the thermal spraying method by gas thermal spraying using oxygen, acetylene, or the like, a gas torch for injecting the molten photocatalyst fine particles and the base material are relatively moved so that the base material surface does not rise to 50 ° C. or more.
However, the melting point of the powder used is limited to 2000 ° C. or less because of gas spraying. By adjusting the relative speed between the torch and the base material, plasma spraying is also possible.
Thermal spraying up to about ℃ is possible.

In general, in thermal spraying, since powder is adhered to a substrate by an anchor effect, powder for thermal spraying is preferably a lump having a size of 5 μm or more.

Conventionally, spray powders in which anatase has been transferred to rutile have been used as the thermal spray powder. This is because titanium oxide (titania) in the form of anatase crystals has a strong photocatalytic action. If all the photocatalyst particles after thermal spraying have anatase crystals, the decomposition action is too strong to attack the substrate. This is because there was a case that it could not be put to practical use because it might be. Therefore, conventionally, in order to prevent the substrate from being attacked, the particle size of the anatase crystal particles, the thermal spraying temperature, the substrate surface temperature, and the heating source used are each set to 5 to 25 μm, about
By adjusting and selecting a gas at ３3000 ° C., 40-50 ° C. and gas, 10-40% of anatase crystals were synthesized. That is, if the temperature exceeds about 750 ° C., which is the transformation point between anatase and rutile, all the crystals become rutile-type crystals. However, according to the above-mentioned thermal spraying method, when all rutile crystal particles are prepared and sprayed, 10-40% of anatase crystals are produced, the rest being rutile crystals, and according to various experiments, the weight ratio of anatase to rutile after spraying is 1: 3.
Was found to be suitable by X-ray analysis.

However, since the base material used in the tile material of the present invention is ceramics, the base material itself is not attacked by OH radicals generated from the photocatalytic function body. Therefore, when spraying, it is not necessary to adjust and select the particle size of the anatase crystal particles, the spraying temperature, the substrate surface temperature, etc. as described above, and it is possible to produce 50% or more of the anatase crystal on the substrate surface. It is. Further, not only the ratio of the anatase crystal particles but also the activity intensity of the photocatalytic functional body can be increased by ozone, ultraviolet rays, hydrogen peroxide, chlorine, hypochlorous acid, or the like.

It is also possible to mix and spray the photocatalyst particles 2 with an adsorbent material 3 which adsorbs bacteria such as apatite, zeolite, activated carbon, harmful substances, odors and the like. In other words, the sprayed hydroxyapatite 3 adsorbs and holds the treatment target such as bacteria, harmful substances, and odors in the atmosphere, and the anatase crystal photocatalyst particles decompose the adsorption / holding treatment target, further enhancing the photocatalytic action. Will be done. In order to enhance the photocatalytic action, it is necessary to increase the contact area where the particles come into contact with the object, but the thermal spraying method is preferable because a film having finer particles and a larger surface area is formed as compared with plasma spraying.

The titanium raw material does not necessarily need to be anatase and rutile, and an appropriate photocatalyst can be obtained by adjusting the comparison between an anatase having a strong catalytic activity and an anatase having a weak catalytic activity.

FIG. 2 is an explanatory diagram for explaining an example of the thermal spraying method used in the present invention. As described above, the spraying method
Photocatalytic particles are melted using oxygen, acetylene, or the like, and a gas torch as a thermal spray gun for spraying the molten photocatalytic particles and a base material are relatively moved.

The distance L between the substrate (ceramic) 20 and the spray nozzle 21 of the thermal spray gun shown in FIG. 2 affects the strength of the photocatalyst particles adhering to the substrate 20, and depends on the type of the substrate 20. Can be changed. Since the substrate 20 in the present invention is a ceramic, the distance L is preferably 50 to 200 mm, and preferably about 85 to 150 mm. If the injection nozzle 21 is too far away from the substrate 20, a sufficient collision force of the particles against the substrate cannot be obtained, and the force for adhering the particles decreases.
Conversely, if the distance is too short, the surface temperature of the base material generally increases, which is not preferable. In the present invention, since the base material is made of ceramics, the surface temperature of the base material does not cause any particular problem.
When the substrate and the base material 20 are short, the above-described distance is preferable because thermal spray unevenness may occur.

Further, the spray nozzle 21 of the thermal spray gun and the substrate 2
With 0, it is relatively moved while maintaining the above distance L. At this time, only the injection nozzle 21 may be moved along the surface of the substrate 20, or the injection nozzle 21 may be fixed and the substrate 20 may be moved. Further, both the ejection nozzle 21 and the base material 20 may be moved simultaneously.

The relative movement speed between the injection nozzle 21 and the substrate 20 is not particularly limited.
This is because, in the present invention, a rise in surface temperature does not pose a particular problem because the base material is ceramic.

The thickness of the photocatalyst functional body is not particularly limited in the present invention, and can be set to an arbitrary thickness by adjusting the relative moving speed. When the substrate is a tile, the thickness of the photocatalyst functional body is 1 to 20.
0 μm is preferred, and 50 to 150 μm is particularly preferred.
If the film thickness is smaller than 1 μm, the effect of the photocatalytic function body may not be sufficiently exhibited. Also, 20
If the thickness is larger than 0 μm, there is a problem in cost. The thickness of the photocatalyst functional body can be arbitrarily adjusted at a place where the photocatalytic tile is used. For example, in a place where abrasion resistance is not required, such as an inner wall, a range of 1 to 50 μm is preferable.
Is preferable.

The spraying of the photocatalyst functional body on the tile surface is not necessarily required to cover the entire tile surface, but may be applied to spots to such an extent that the photocatalytic action is performed. By adhering to the spots, the cost for tile formation can be reduced.

FIG. 3 shows the photocatalyst particles 4 applied on the substrate 1.
The photocatalyst particles 4 are composed of titanium oxide particles 4a and silver particles 4b carried on the particles. The photocatalyst particles 4 can have the same structure as the particles in the case of the thermal spraying method shown in FIG.

Here, even in the case of using as a coating material in the same manner as the above-mentioned thermal spraying method, it is possible to increase the oxidizing power by increasing the proportion of titanium oxide (TiO ₂ ) in the form of anatase crystals as compared with the prior art. It is. And
Even in this case, since the ceramic is used as the base material in the present invention, the base material itself does not become ragged.

However, when used as a paint, it is necessary to prevent the binder resin from being decomposed by a photocatalyst because the binder resin is contained in the paint. Accordingly, the weight ratio of anatase to rutile in the titanium oxide particles as the raw material is 20 to 50%: 50 to 50%.
If the ratio of anatase is less than this, the photocatalytic action is weak. If the ratio is more than this, the photocatalytic action is too strong to decompose the binder 6 and immediately decompose the paint. Most preferably, the weight ratio of anatase to rutile is about 3: 7.

As in the case of the thermal spraying, the titanium raw material does not necessarily have to be anatase and rutile, and an appropriate photocatalyst can be obtained by adjusting the comparison between an anatase having a strong catalytic activity and an anatase having a weak catalytic activity. can do.

The coating material contains at least a film forming component and a dispersant as the binder 6 in addition to the optical semiconductor powder, the metal powder and the adsorbing material, and other components as required.

The components for forming the coating film include cellulose derivatives, phthalic acid resins, phenol resins, alkyd resins, amino ald resins, acrylic resins, epoxy resins, urethane resins, vinyl chloride resins, silicone resins, fluorine resins, emulsions, and water-soluble resins. And the like. Examples of the dispersant include petroleum solvents, aromatic solvents, alcohol solvents, ester solvents, ketone solvents, cellosolve solvents, inorganic silicon solvents, water and the like. When a powder coating is used, a solvent as a dispersant is not required. Other components include pigments, for example, inorganic pigments such as titanium dioxide, graphite, red iron oxide, chromium oxide, and carbon black; organic pigments such as Hansa Yellow, Nova Palm Orange, quinacridone violet, and copper phthalocyanine; Examples include extender pigments such as calcium, barium sulfate, talc, clay, and white carbon, and special functional pigments represented by anticorrosive pigments such as zinc chromate, strontium chromate, zinc phosphate, and aluminum phosphate. Further, in addition to the above components, as auxiliary materials, desiccants for imparting coating film accelerating properties, pigment dispersants, anti-flooding agents, pigment sedimentation inhibitors, and additives for adjusting the fluidity of paints. Viscous agent, thixotropic agent, anti-drip agent, leveling agent for the purpose of coating surface adjustment, defoamer,
In addition to anti-repellent and anti-floating agents, plasticizers,
An anti-skinning agent, an auxiliary for electrostatic coating, an anti-scratch agent, an anti-blocking agent, an anti-UV agent, an anti-staining agent, an antiseptic, a fungicide and the like can be added. There is no special mixing ratio of each of these components, and the same mixing ratio as that of a commercially available paint can be applied.

The total amount of the optical semiconductor powder, the metal powder and the adsorbing material in the paint is 3 to 55% of the total amount of the paint in order to exert effects such as sterilization and deodorization and to secure appropriate paintability.
% By weight, and particularly preferably 15 to 35% by weight.

The optical semiconductor powder and the metal powder (Ag)
The weight ratio of the adsorption material (hydroxyapatite) is 7
0 to 80% by weight to 10 to 20% by weight is preferred.

The component ratio of the paint used by the present applicant is as follows.

1) Acrylic lacquer paint

[Table 1]

2) Liquid urethane paint (in the coating film when dried) 30% photocatalyst, binder solid content 7
0%.

[Table 2]

3) Baking acrylic paint (in the dried film) 30% photocatalyst, solid content 7 of binder
0%.

[Table 3]

4) Aqueous acrylic paint (in the dried coating) 50% photocatalyst, binder solids 5
0%.

[Table 4]

In general, the photocatalyst is a non-eluting system, and the metal carried on the photosemiconductor powder acts as an electrode, which does not elute in the liquid and sterilizes it, but generates OH generated in the presence of water. It exerts a bactericidal effect by radicals. On the other hand, a conventional dissolution type antibacterial agent, for example, a mixture of an antibacterial agent consisting of zeolite carrying a metal such as silver, copper, and zinc having antibacterial properties and a binder is applied to a necessary portion and dried. As shown in FIG. 4, the metal is eluted into the solution immediately and shows immediate effect, but the effect is reduced in a short time, and the part where the metal is eluted becomes a nest of bacteria and causes harm instead. Becomes In other words, most of the conventional antibacterial agents are of the eluting type, whereas the photocatalytic functional body of the present invention is of the non-eluting type, so that it hardly dissolves in the liquid, and the effect lasts for a long time. Become.

Further, as shown in FIG. 4, the conventional photocatalyst functional body was sometimes inferior to the conventional antibacterial agent in the immediate effect, but in the tile material of the present invention, Since ceramics is used, it can be used in combination with ozone, ultraviolet light, and the like. Immediate effect can also be imparted by increasing OH radicals at an accelerated rate.

[4] Specific Use Specific use of the above-described tile material of the present invention will be described below.

Ceramics may be one of the ceramics that can be suitably used as the base material of the tile material of the present invention. Porcelain is a general term for so-called "porcelain", which is a mixture of clay or earth and stone powder and clay, which is baked. The porcelain is one of the traditional ceramics.

FIG. 5 is a schematic perspective view of the tile material 50 of the present invention.

The tile can be expected to be used in the following places by attaching the above-mentioned photocatalyst functional body to the tile surface 51 made of ceramics as a base material.

Hygiene management of places where food and drinks are handled For the purpose of hygiene management of places where foods and drinks are handled, floors and inner walls of restaurants and kitchens, kitchens and the like of general households, storage tanks for drinking water, agricultural products and marine products Can be used for the inner wall and floor of a storage room.

Water quality management in water places and prevention of moss, waterweed, and bacterial growth In water places in urban spaces (for example, fountains in parks),
Water quality management and the deterioration of aesthetics due to moss, aquatic plants, and bacterial growth are often problematic. The problem described above can be solved by using the tile material of the present invention around such a water place. More specifically, in addition to water holes in urban spaces represented by the fountains in the parks, etc., marine structures such as lighthouses and piers, water purification plants and pools, homes, baths for business use or hospitals, and fish farms It can be used for water quality management such as squeeze, rainwater and drinking water quality management.

As described above, as a method for attaching the photocatalyst functional body to the tile surface, any of the thermal spraying method and the method of applying as a paint can be used, but in the case of the thermal spraying method, a binder is not required. Since the tile serving as the base material is made of ceramics (inorganic substance), it is preferable in that titanium oxide in the form of anatase crystal can be used at a higher ratio than before.

On the other hand, in a method in which a paint containing a photocatalyst functional body is applied to the tile surface by applying the paint,
The tiles can be of various colors, which is preferable in that the place where the tiles are installed can have a design property.

The size and shape of the tile are not particularly limited in the present invention, and may be any size and shape. It is also possible to attach a photocatalyst functional body not only on the front surface of the tile but also on the back surface of the tile. If a tile is used for a long period of time, the tile may be cracked, and water will accumulate in the cracked area, often causing mold and the like. By attaching the adhesive, it is possible to prevent the occurrence of mold and the like.

It is also possible to attach a photocatalyst functional body to a tile made of the same base material (ceramic) as the tile, and it is possible to achieve the same operation and effect as the tile of the present invention.

[0064]

[1] Tile characteristics 300 x 300 mm tile (porcelain-free floor tile)
Was formed by a known technique, and a photocatalyst functional body was adhered to the surface thereof by a thermal spraying method to form a tile material of the present invention (a photocatalyst was coated to a thickness of 70 to 100 μm). Then, the tile characteristics of the tile material of the present invention were tested. The results are shown in Table 5 below.

In testing the tile characteristics, J
Based on IS standard.

[0066]

[Table 5]

As shown in Table 5, the tile material of the present invention was obtained from JI
It turns out that the standard of S standard is fully satisfied.

[2] Antibacterial Property The antibacterial property of the tile material of the present invention was tested. In this test, the same number of various bacteria and fungi were applied to the tile material of the present invention (the photocatalytic functional body adhered to the surface) and the ordinary tile material (untreated), and the number of the fungi was counted at regular intervals. Was performed by counting. The results are shown in Table 6 below.

[0069]

[Table 6]

From Table 6 above, it can be seen that the tile material of the present invention (Example) is superior in antibacterial property (bactericidal property) as compared with a normal tile material (Comparative Example). In addition, it can be said that it has an immediate effect especially on Gram-negative bacteria such as Escherichia coli and green bacterium.

[0071]

According to the present invention, by forming a tile material on which a photocatalytic functional body is adhered by using a base material as a kind of ceramics,
Since the ceramics are inorganic, they are not decomposed into OH radicals generated from the photocatalyst, so that even if the activity strength of the photocatalyst is increased, the tile material can be obtained without being attacked by the base material itself.

The tile material can be installed at any place such as the inner wall of a bath, a water place in an urban space, a water tank or a pool, a floor or a wall of a food factory, and the like. The sheath shape can be formed arbitrarily.

Further, since the substrate is not affected by the photocatalytic action, it is possible to increase the active strength of the photocatalyst by using ozone, ultraviolet rays, hydrogen peroxide or the like in combination, and to improve the immediate effect in addition to the durability. Can also be provided.

[Brief description of the drawings]

FIG. 1 is a coating state diagram when a tile material of the present invention is formed by thermal spraying.

FIG. 2 is an explanatory diagram for explaining a thermal spraying method used in the present invention.

FIG. 3 is a diagram showing a state of a film formed by paint or printing ink.

FIG. 4 is a diagram showing a comparison between the effect of a conventional photocatalyst and the effect of the present invention as a photocatalyst.

FIG. 5 is a schematic perspective view of a tile material of the present invention.

[Explanation of symbols]

 1, 20: base material 2, 4: photocatalyst functional body 2a, 4a: photo-semiconductor powder (titanium oxide particles) 2b, 4b: fine particles (silver particles) serving as electrodes 3, 5, ... adsorbing material 6: binder 21: injection nozzle 50: tile material L: distance between spray nozzle and substrate

 ──────────────────────────────────────────────────続 き Continued on front page F term (reference) 4C058 AA07 AA20 AA23 BB02 JJ04 JJ05 JJ07 JJ21 4C080 AA07 BB02 BB05 CC01 HH05 JJ03 KK08 LL10 MM02 4G069 AA03 BA04B BA48A CA01 CA06 CA10 CA11 CA17 DA06EA

Claims (2)

[Claims] 1. A tile material having a photocatalyst functional body made of at least an optical semiconductor powder adhered on a ceramic base material. 2. The tile material according to claim 1, wherein the photocatalytic function body is attached by a thermal spraying method.