JPH09164091A - Bottomed container with photocatalyst and molding thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To remove a malodor or a contaminant without using manual labor by removing the contaminant or malodor stuck to the surface of a container with near ultraviolet rays. SOLUTION: A photocatalyst 10 is provided on the inner face and the flange section 2 of a bathtub 1, for example. An adhesive containing the photocatalyst 10 is applied on the surface of the bathtub 1. A thermosetting acrylic resin member, an alkyd melamine resin member, vinyl acetate, a fluororesin, or a silicone resin is used for the adhesive. Titanium dioxide or a mixture of the titanium dioxide and activated carbon is used for the photocatalyst 10 contained in the adhesive, for example. The coating thickness is set to about 0.3-30μm, the compounding ratio of the photocatalyst 10 is set to 0. 5-20wt.%, and the weight average grain size of the photocatalyst 10 is set to 0.01-10μm. When the photocatalyst 10 receives the ultraviolet rays of 300-400nm from the sun, a fluorescent lamp, or a ultraviolet lamp, it is activated to oxidize and decompose an organism, a nitrogen oxide, and a chlorine compound.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of using a photocatalyst, and more specifically, it is provided with a photocatalyst on the surface of a vessel such as a bathtub or a cooler box for fishing, and decomposes organic substances (acetaldehyde, ammonia, dirt, etc.) attached to the surface. Action,
The present invention relates to a bottomed container having a sterilizing action and a deodorizing action.

[0002]

2. Description of the Related Art As a means for circulating hot water in a bathtub with a pump to purify it, for example, an apparatus for sterilizing with hot water in a circulating route of the hot water has been proposed. Further, a water purifying device in which a light source that emits ultraviolet rays and a photocatalyst are arranged in the hot water circulation path is proposed in Japanese Patent Laid-Open No. 6-218393.

When an organic substance (acetaldehyde, ammonia, dirt, etc.) adheres to the surface of a bathtub or a cooler box and stains a bad odor, it is manually washed with water and a detergent.

[0004]

However, in the above method, the stains and odors such as organic substances adhering to the surface of the bottomed container are removed by washing and not automatically by the photocatalyst. Further, the case proposed in Japanese Patent Laid-Open No. 6-218393 does not decompose and remove the dirt adhering to the surface of the bath.

The present invention is for decomposing and sterilizing organic substances (acetaldehyde, ammonia, dirt, etc.) attached to the surface.
An object is to provide a bottomed container having a deodorizing action.

[0006]

In order to solve the above-mentioned problems, the bottomed container in the present invention has a structure in which powder particles of photocatalyst are provided on the surface of the bottomed container, and adheres to the surface by receiving near ultraviolet rays. It is characterized by removing pollutants and offensive odors.

As an example of specific means for providing the photocatalyst on the surface, an adhesive containing the photocatalyst is applied to the surface of the bottomed container.

As another means, in the process of molding a bottomed container such as a bath or a cooler box, for example, in the injection molding process, photocatalyst powder particles are arranged on the surface of an injection material, for example, a resin member. .

A thermosetting acrylic resin member (eg, acrylic melamine resin) is used as an adhesive containing a photocatalyst.
Or an organic binder such as an alkyd melamine resin member, a vinyl acetate-based resin, a fluororesin-based resin, a silicon resin-based resin, an epoxy resin-based resin, a UV resin (ultraviolet curing resin), or the like.

The photocatalyst contained in the adhesive may be any photocatalyst such as titanium dioxide or a mixture of titanium dioxide and activated carbon.

The surface of the photocatalyst fixed to the surface of the bottomed container is initially covered with the organic binder (acrylic resin adhesive or the like). However, the photocatalyst is 300n
By receiving near-ultraviolet rays of m to 400 nm, the organic binder on the side receiving the near-ultraviolet rays (the surface side in contact with the atmosphere) is decomposed and removed, and the photocatalyst is exposed. And it functions as a photocatalyst.

By disposing a photocatalyst consisting of titanium dioxide or a mixture of titanium dioxide and activated carbon on the surface of the bottomed container, stains on the surface can be prevented, bacteria on the surface can be killed, and a clinging odor can be removed.

That is, the photocatalyst that receives near-ultraviolet rays of 300 nm to 400 nm from the sun, fluorescent lamps, ultraviolet lamps, etc. is activated and oxidizes and decomposes organic substances (acetaldehyde, ammonia, etc.), nitrogen oxides, chlorine compounds, etc.

The coating thickness of the adhesive containing the photocatalyst is set to a minimum of 0.1 μm to 30 μm.

The compounding ratio of the photocatalyst compounded in the adhesive is 0.5.
W% to 20 W% and the weight average particle diameter of the photocatalyst is 0.01
The range is from micron meter to 10 micron meter.

The structure of the photocatalyst is, for example, JP-A-4-4.
Japanese Patent No. 5853 is proposed. Here, a highly active photocatalyst is formed by bringing a catalyst carrying a reducing catalytically active component and a photocatalyst carrying an oxidizing catalytically active component into contact with each other, and further contacting a water-repellent substance with one of them. doing.

As a specific example, a component having catalytic activity for reducing carbon dioxide gas such as copper or mercury is supported on a conductive carrier such as carbon black. Further, a component such as silver or platinum having a catalytic activity for the oxidative oxidation reaction of water is supported on a semiconductor such as titanium dioxide. Then, the two are brought into contact with each other, but recombination of charges is prevented because the active sites are separated. Further, since the water-repellent substance is brought into contact with any of them, the catalyst floats and is present on the surface layer of the aqueous solution to obtain a highly active photocatalyst.

The titanium alkoxide compound is dissolved in an equimolar amount of ethanol or the like, and hydrolyzed by adding hydrochloric acid or the like. The obtained titanium oxide can be formed into any shape without a binder.

The titanium dioxide is preferably anatase type, but it may be rutile type titanium dioxide metallized with copper, silver, platinum or other metal.

Further, W0 ↓ 2, CdS, SrTiO ↓
2, a semiconductor such as MoS ↓ 2 may be used to form the photocatalyst.

With the above-described structure, the present invention makes it possible to remove organic substances, odors and the like adhering to the surface of the bottomed container without using a special device or manpower.

That is, when the photocatalyst is exposed to sunlight or near-ultraviolet rays such as a fluorescent lamp, organic substances and nitrogen oxides can be oxidized and captured on the photocatalyst. as a result,
Enables a healthy and comfortable life. In addition, the environment can be improved.

With time, the photocatalyst mainly covers the active part of the surface with the product, and the ability to remove pollutants gradually decreases. However, the activity is recovered by washing the product with water or hot water itself. .

[0024]

BEST MODE FOR CARRYING OUT THE INVENTION The invention according to claim 1 of the present invention is characterized by comprising a photocatalyst on the surface of a container, and removing pollutants or odor adhering to the surface of the container by receiving near-ultraviolet rays. It is a bottomed container equipped with a photocatalyst, and has an action of oxidizing and decomposing contaminants such as organic substances (acetaldehyde, ammonia, etc.), nitrogen oxides, chlorine compounds, etc. adhering to the surface of the container.

Next, the invention according to claim 2 is characterized in that the photocatalyst is mainly composed of either titanium dioxide or a mixture of titanium dioxide and activated carbon. The container is a bottomed container provided with the function of oxidizing and decomposing contaminants such as organic substances (acetaldehyde, ammonia, etc.), nitrogen oxides, chlorine compounds, etc. adhering to the surface of the container.

Next, the invention according to claim 3 is a bottomed container equipped with a photocatalyst characterized in that an adhesive containing a photocatalyst is applied to the surface of the container. It has a function of oxidizing and decomposing adhered organic substances (acetaldehyde, ammonia, etc.), nitrogen oxides, and pollutants such as chlorine compounds.

Next, in the invention according to claim 4, the adhesive is made of an acrylic type, a vinyl acetate type, a fluororesin type, a silicone resin type, an epoxy resin type, a urethane resin type, a polyester resin type, a phenol resin type or a poly resin. 4. A bottomed container equipped with the photocatalyst according to claim 3, wherein the container is a vinyl chloride-based one, and organic matter (acetaldehyde, ammonia, etc.) attached to the surface of the container, and nitrogen oxidation. It has the effect of oxidizing and decomposing contaminants such as substances and chlorine compounds.

Next, the invention according to claim 5 is a bottomed container equipped with a photocatalyst characterized in that a photocatalyst is embedded in the surface of the container. And ammonia), nitrogen oxides, chlorine compounds and other pollutants are oxidized and decomposed.

Next, in the invention according to claim 6, a pair of molds including a movable mold and a fixed mold is prepared, a molding material is supplied to a cavity of the mold, and then the movable mold is moved. A method for forming a bottomed container equipped with a photocatalyst is characterized in that the photocatalyst is arranged on the surface of the bottomed container by supplying a gas containing a photocatalyst to the space provided by retracting the space. However, the coating layer of the photocatalyst can be formed in the process of injection molding, and the work for constructing the coating layer is unnecessary. Therefore, the process is simplified and the cost can be reduced.

Next, the invention according to claim 7 is a method for molding a bottomed container equipped with a photocatalyst according to claim 6, characterized in that the gas contains an adhesive. It has the function of being more surely secured on the surface of the bottomed container.

Next, in the invention described in claim 8, a pair of molds including a movable mold and a fixed mold is prepared, a molding material is supplied to a cavity of the mold, and then the movable mold is moved. It is characterized in that the photocatalyst is supplied to the void by retreating to form a void, and further the movable die is advanced to press the photocatalyst to be embedded near the surface of the bottomed container. The method for forming a bottomed container provided with a photocatalyst according to the above can form a coating layer of a photocatalyst in the process of injection molding, and the work for forming the coating layer is unnecessary. Therefore,
This has the effect of simplifying the process and reducing costs.

The bottomed container according to the embodiment of the present invention will be described below with reference to FIGS.
This will be described with reference to FIG.

(Embodiment 1) FIG. 1 is a plan view of a bath 1 (bottomed container) according to Embodiment 1 of the present invention. FIG.
Shows a vertical sectional view of FIG. 1 taken along the cutting lines S1 to S1.

As shown in FIGS. 1 and 2, the bathtub 1 of the present invention has a substantially U-shaped bottomed container shape, and a collar portion 2 is provided around the upper end side. Further, water supply ports 3 and 4 and a drainage port 5 are provided on the side wall and the bottom surface as required. In the case of bathtubs for infants, the water supply ports 3 and 4 and the drainage port 5 are often not provided.

The members constituting the bath 1 may be arbitrary members such as stone materials, stainless steel members, or resin members such as acryl, polycarbonate, vinyl chloride, and epoxy. Also, the shape may be arbitrarily implemented.

Further, the bath 1 has a structure in which photocatalyst powder particles are provided on at least one of the outer surface and the inner surface of the bath. In the embodiment shown in FIG. 1, the bath is provided with a photocatalyst only on the inner surface and the collar portion.

As a first means for providing the photocatalyst on the inner surface of the bath 1, an adhesive containing the photocatalyst is applied to the surface of the bath.

As the adhesive containing the photocatalyst, as described above, a thermosetting acrylic resin member (for example, acrylic melamine resin), alkyd melamine resin member, vinyl acetate resin, fluororesin resin, or silicone resin resin, or One of a synthetic resin member (or an organic binder) such as a urethane resin type, a polyester resin type, a phenol resin type, or a polyvinyl chloride type is used.

The photocatalyst contained in the adhesive may be any photocatalyst such as titanium dioxide or a mixture of titanium dioxide and activated carbon.

The minimum coating thickness of the photocatalyst layer is about 0.3 μm to 30 μm.

The compounding ratio of the photocatalyst compounded in the adhesive is 0.5.
W% to 20 W% and the weight average particle diameter of the photocatalyst is 0.01
The range is from micron meter to 10 micron meter.

In addition to the above adhesive, a method of using an epoxy resin adhesive may be used as a method of supporting the titanium dioxide particles. In this case, the titanium dioxide particles are impregnated with water, dispersed in an adhesive containing an epoxy resin, and then applied on the surface of the bath forming the envelope. And 30 degrees Celsius ~
After primary drying at 50 degrees and evaporation of thinner, 8 degrees Celsius
The photocatalyst layer is formed by secondary drying at 0 to 200 degrees.

Needless to say, as the coating method, any means such as dip coating, spray coating, electrostatic coating or powder coating may be used.

Further, titanium dioxide particles may be dispersed and applied to a portion corresponding to a dispersion medium of a pigment, that is, a portion corresponding to a transparent adhesive (vehicle).

Further, instead of using the above adhesive as a means for supporting the photocatalyst on the surface of the bath, an organic adhesive or a water-soluble adhesive may be used for fixing. Alternatively, the UV resin may contain powder particles of photocatalyst and be applied to the surface of the bath.

In the case of a bathtub for infants, it is desirable to dispose a photocatalyst on the entire surface of the bathtub.

Further, as a second means for providing the photocatalyst on the inner surface of the bath 1, as shown in FIG. 5, a method of coating or embedding powder particles of the photocatalyst on the surface of the molded article in the process of injection molding is used. Good.

FIG. 5 is a sectional view showing the concept of the injection molding apparatus. In FIG. 5, resin for forming a bath is injected into the cavity of a pair of molds composed of a fixed mold 122 and a movable mold 123, The movable mold 123 is retracted by a small amount (δ = several tens μm to several hundreds μm) to the position indicated by the chain double-dashed line, and a void is provided on the side forming the inner surface of the bath. (Not shown) A photocatalyst injection device 41D injects a gas containing photocatalyst powder particles to form a photocatalyst coating layer on the outer surface of the bath.

The powder particle size of the photocatalyst contained in the gas is 0.
The range is from 01 micrometer to 100 micrometer.

The timing of injecting the gas containing the photocatalyst into the inner surface of the void is arbitrary. For example, when a gas containing photocatalyst powder particles is injected, the injection is performed before the resin in the mold cavity is cooled and solidified.

Of course, the gas containing the photocatalyst may be injected after the resin is cooled and solidified. In this case, a binder, an adhesive resin, a diluting solvent or the like may be included in the gas so that the photocatalyst does not peel off from the adhered surface.

When the high-pressure gas containing the photocatalyst does not contain the binder, the adhesive resin, or the diluting solvent, the mold that had been retracted is advanced again after the injection and the photocatalyst coating surface is pressed to form the photocatalyst layer. It may be embedded on or near the surface of the molded product.

Further, the nozzle for injecting the photocatalyst is not limited to one location, but may be disposed in a plurality of locations. As the solvent, any solvent such as alcohol, toluene, thinner, and acetone is used, and as the adhesive, epoxy resin, acrylic resin, vinyl chloride resin, ABS resin, PS resin, polyamide resin, polycarbonate resin, styrene resin, etc. , A predetermined amount of any resin member may be included.

Furthermore, an injection-moldable member constituting a molded product (bath) may be optionally implemented in addition to the above.
For example, a resin member such as ABS, PS, PP, PE, PET, epoxy, or expanded polystyrene may be used. Of course, biodegradable plastic may be used. For example, a denatured protein member such as gluten, a member obtained by kneading paper and a denatured protein, a member obtained by kneading cellulose and a denatured protein forming paper, an agar member, a member obtained by kneading potato starch with water, a natural polymer Novamont (Product name: Matterby / Nippon Synthetic Chemical Industry), Microbial polyester type I
CI (trade name: Biopol / ICI Japan), chemically synthesized aliphatic polyester (trade name: Bionole / Showa High Polymer) and the like may be optionally used.

According to the present invention, the characteristics of the resin member used for injection molding are not changed by the above constitution. For example,
An arbitrary structure or curved surface shape can be configured according to the variety of designs and the purpose of use without changing the molding characteristics of the resin member. Furthermore, the quality of the molded product does not deteriorate.

Further, the coating layer of the photocatalyst can be formed in the process of injection molding, and the work for constructing the coating layer becomes unnecessary. Therefore, the process can be simplified and the cost can be reduced.

The photocatalyst provided on the surface of the bath is activated by receiving near-ultraviolet rays of 300 nm to 400 nm, such as the sun, fluorescent lamps, and ultraviolet lamps, and is activated by organic substances (acetaldehyde, ammonia, dust, etc.), nitrogen oxides, chlorine compounds. Etc. are oxidized and decomposed.

The structure of the photocatalyst is, for example, JP-A-4-4.
Japanese Patent No. 5853 is proposed. Here, a highly active photocatalyst is constructed by bringing a catalyst supporting a reducing catalytic activated carbon component and a photocatalyst supporting an oxidizing catalytic activated carbon component into contact with each other, and further bringing a water repellent substance into contact with either of them. doing.

As a specific example, a component having catalytic activity for a reduction reaction of carbon dioxide gas such as copper or mercury is supported on a conductive carrier such as carbon black. In addition, a component such as silver or platinum having a catalytic activity for oxidizing water is supported on a semiconductor such as titanium dioxide.

Then, the two are brought into contact with each other, but the active points are apart from each other, which hinders the recombination of charges. Further, since the water-repellent substance is brought into contact with any of them, the catalyst floats and is present on the surface layer of the aqueous solution to obtain a highly active photocatalyst.

As the pressure fluid, nitrogen gas, an inert gas (eg, argon gas) or the like may be optionally used other than compressed air.

As described above, the bathtub (bottomed container) according to the first embodiment of the present invention can remove organic substances, malodors and the like adhering to the surface without using a special device or manpower.

(Second Embodiment) FIG. 4 is a vertical sectional view of a cooler box 31 according to a second embodiment of the present invention.

FIG. 3 is an external perspective view of the cooler box 31. In FIG. 4, reference numeral 32, which constitutes a main part, is a heat insulating container (bottomed container), and 33 is a lid.

The heat insulating container 32 (bottomed container) is provided with photocatalyst powder particles on at least one of the surface, that is, the outer surface and the inner surface. In the embodiment shown in FIG. 4, the photocatalyst is provided on both the inner surface and the outer surface.

As a first means for providing the photocatalyst on the surface of the heat insulating container 32, an adhesive containing the photocatalyst is applied.

The first embodiment of the adhesive containing the photocatalyst
As described above, a thermosetting acrylic resin member (for example, acrylic melamine resin), alkyd melamine resin member, vinyl acetate resin, fluororesin resin, silicone resin resin, urethane resin resin, polyester resin resin, or Any one of a synthetic resin member (or an organic binder) such as a phenol resin type, a polyvinyl chloride type, or an epoxy resin type is used.

The photocatalyst contained in the adhesive may be any photocatalyst such as titanium dioxide or a mixture of titanium dioxide and activated carbon.

The minimum coating thickness of the photocatalyst layer is about 0.3 μm to 30 μm.

The compounding ratio of the photocatalyst compounded in the adhesive is 0.5.
W% to 20 W% and the weight average particle diameter of the photocatalyst is 0.01
The range is from micron meter to 100 micron meter.

These configurations are the same as those in the first embodiment, and the action of the photocatalyst is also the same.

That is, the photocatalyst provided on the surface of the heat insulating container 32 is activated by receiving near ultraviolet rays of 300 nm to 400 nm, such as the sun or a fluorescent lamp, and the odor or contaminants such as organic substances (acetaldehyde) attached to the surface of the heat insulating container 32 are activated. And ammonia), nitrogen oxides, chlorine compounds, etc. are oxidized and decomposed and removed.

As a second means for providing the photocatalyst on the inner surface of the heat insulating container 32, as shown in FIG. 5, powder particles of the photocatalyst are applied or embedded on the inner surface of the molded product (cooler box) in the process of injection molding. Method is used. Since the molding method has been described in the first embodiment, redundant description will be avoided.

Needless to say, the photocatalyst is also provided on the surfaces (inner surface and outer surface) of the lid 33 which constitutes the cooler box.

The cooler box equipped with a photocatalyst is activated by receiving near-ultraviolet rays of 300 nm to 400 nm such as the sun or a fluorescent lamp, and the odor or contaminants such as organic substances (acetaldehyde, ammonia, etc.) attached to the surface of the heat insulating container or the lid. , Nitrogen oxides, chlorine compounds, etc. are oxidized to decompose and remove.

Needless to say, the bottomed container may have any shape and any container other than the above-mentioned bathtub or heat insulating container (cooler box for fishing, etc.). For example, it may be tableware or various cooking utensils. Further, it may be an ashtray or the like and a bottomed container for the purpose of removing the bad odor by itself.

[0077]

INDUSTRIAL APPLICABILITY As described above, the bottomed container according to the present invention oxidizes odors or pollutants such as organic substances and nitrogen oxides adhering to the surface and captures them on the photocatalyst without using special equipment or manpower. Can be removed.

[Brief description of the drawings]

FIG. 1 is a plan view of a bathtub according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of FIG. 1 taken along cutting lines S1 to S1.

FIG. 3 is an external perspective view of a cooler box according to Embodiment 2 of the present invention.

FIG. 4 is a longitudinal sectional view of FIG. 3;

FIG. 5 is a cross-sectional view of a main part of a molding device used for molding in Embodiments 1 and 2 of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bathtub 2 Collar part 3,4 Water supply port 5 Drainage port 10 Photocatalyst 31 Cooler box 32 Insulation container 33 Lid 41D Photocatalyst injection device 121 Molded article 122 Fixed type 123 Movable type 124 Cylinder 150 Mold

Claims (8)

[Claims] 1. A bottomed container equipped with a photocatalyst, which comprises a photocatalyst on the surface of the container and removes pollutants or odors adhering to the surface of the container by receiving near-ultraviolet rays. 2. The bottomed container provided with the photocatalyst according to claim 1, wherein the photocatalyst is mainly composed of either titanium dioxide or a mixture of titanium dioxide and activated carbon. 3. A bottomed container provided with a photocatalyst, characterized in that an adhesive containing a photocatalyst is applied to the surface of the container. 4. The adhesive is any one of acrylic type, vinyl acetate type, fluororesin type, silicon resin type, epoxy resin type, urethane resin type, polyester resin type, phenol resin type, and polyvinyl chloride type. A bottomed container provided with the photocatalyst according to claim 3. 5. A bottomed container provided with a photocatalyst, wherein the photocatalyst is embedded in the surface of the container. 6. A pair of molds including a movable mold and a fixed mold is prepared, a molding material is supplied to a cavity of the mold, and thereafter, the movable mold is retracted to provide a void portion. A method of molding a bottomed container provided with a photocatalyst, characterized in that the photocatalyst is disposed on the surface of the bottomed container by supplying a gas containing a photocatalyst to the bottom part. 7. The method for molding a bottomed container provided with a photocatalyst according to claim 6, wherein the gas contains an adhesive. 8. A pair of molds including a movable mold and a fixed mold is prepared, a molding material is supplied to a cavity of the mold, and then the movable mold is retracted to form a void portion, A photocatalyst is supplied to the void, and further, the photocatalyst is pressed by advancing the movable mold so that the photocatalyst is embedded near the surface of the bottomed container. Molding method.