JP6200569B2 - Antiviral decorative board and method for producing antiviral decorative board - Google Patents

Description

The present invention relates to a decorative board and a manufacturing method thereof.

Conventionally, a decorative board provided with functionalities such as antifouling properties and antibacterial properties by adding or applying a functional substance such as a photocatalyst to a decorative board such as a melamine decorative board has been provided.

Patent Document 1 discloses an antifouling decorative board having a silicone resin layer formed on the surface thereof.

JP 2003-276149 A

FIG. 3 is a schematic cross-sectional view schematically showing a conventional decorative board.
In the decorative board 3, a functional substance 14 such as a photocatalyst is fixed to the surface resin layer 12 (silicone resin layer).

The decorative board 3 shown in FIG. 3 is a water-repellent resin such as a silicone resin having a flat surface, so that it has excellent antifouling properties, but bacteria and viruses are difficult to adhere to the surface, and functions with these bacteria and viruses. The contact probability and contact time with the functional substance were not sufficient, and the antibacterial and antiviral effects of the functional substance could not be sufficiently exhibited. Moreover, when the decorative board surface was wiped off and cleaned, the functional substance on the surface fell off and the function was lost.

The present invention has been made in view of the above problems, and provides a decorative board that prevents deterioration of a surface resin layer made of a melamine resin and the like, has excellent functionality, and maintains the same, and a method for producing the same. With the goal. In particular, an object is to provide a decorative board excellent in antibacterial and antiviral effects and its maintenance, and a method for producing the same.

The decorative board of the present invention comprises a base material, a surface resin layer laminated on one or both surfaces of the base material, a resin sheet comprising an oxidation-resistant resin disposed on the surface resin layer, and the resin And a functional substance carried on the sheet, wherein a concave pattern is formed on the surface of the resin sheet on the side carrying the functional substance.

In the decorative board of the present invention, a functional substance such as a photocatalyst is supported on an oxidation-resistant resin sheet, so that the original function as a functional substance such as antibacterial and antiviral properties can be exhibited. The effect can be maintained for a long time.
Further, when the functional substance is supported on the oxidation-resistant resin sheet, it is possible to prevent the functional substance from contacting the surface resin layer. As a result, discoloration and deterioration of the surface resin layer due to the functional substance can be prevented.

Furthermore, in the decorative board of the present invention, a concave pattern is formed on the surface of the resin sheet on the side where the functional substance is carried. Therefore, even when the resin sheet is made of a water-repellent resin such as a silicone resin or a fluororesin, bacteria and viruses are trapped in the groove with the concave pattern, and thus sufficiently react with a functional substance such as a photocatalyst. Opportunities and time are available and bacteria and viruses can be inactivated. In addition, if the surface has a concave pattern, the surface area of the decorative plate increases, so the amount of functional substances such as photocatalysts can be increased, and bacteria and viruses can be deactivated more efficiently. Can do. Furthermore, since functional materials such as photocatalysts are also supported inside the groove with the concave pattern, even if the decorative material surface is wiped and cleaned, the functional material inside the groove remains without being removed. There is no loss of the inactivation function of bacteria and viruses.

In addition, the resin sheet which consists of oxidation resistant resin in this invention may be the resin sheet shape | molded in the film form, and the impregnation paper which impregnated oxidation resistant resin to paper may be sufficient. Alternatively, a liquid oxidation-resistant resin may be applied to the surface resin layer in a layer form, dried and cured to form a sheet. That is, the resin sheet made of the oxidation resistant resin in the present invention can be rephrased as an oxidation resistant resin layer.

In the decorative board of the present invention, the depth of the concave pattern is desirably 10 to 50 μm. If the concave pattern is too deep, functional substances such as photocatalysts will localize and the antiviral properties will decrease. Conversely, if the concave pattern is too shallow, viruses cannot be trapped and the antiviral properties will decrease. .

The concave pattern is preferably used for a delicate pattern such as a wood grain pattern. This is because the unevenness of the conduit portion can be realistically expressed, and the molded decorative material can obtain the same texture as the material using actual wood.

In the decorative board of the present invention, the resin sheet made of an oxidation resistant resin is preferably made of a silicone resin or a fluororesin. Silicone resins and fluororesins have the property that they are not easily oxidized by functional substances such as photocatalysts. Therefore, by supporting a functional substance on a resin sheet made of silicone resin or fluororesin, it is possible to prevent the functional substance from contacting the surface resin layer and to prevent deterioration of the resin sheet.

In the decorative board of the present invention, the thickness of the resin sheet is preferably 10 to 1000 μm. By setting the thickness of the resin sheet in the above range, the functional substance can be brought into close contact with the surface resin layer, and the characteristics of the functional substance are sufficiently exhibited.

In the decorative board of the present invention, the functional substance is preferably a visible light responsive photocatalyst.

In the decorative board of the present invention, the visible light responsive photocatalyst is a platinum-supported titania catalyst, a copper-supported titania catalyst, an iron-supported titania catalyst, a nitrogen-doped titania catalyst, a sulfur-doped titania catalyst, a carbon-doped titania catalyst, or tungsten oxide. It is desirable to be.

In the method for producing a decorative board according to the present invention, a resin-impregnated paper and a resin sheet made of an oxidation-resistant resin are disposed on one or both surfaces of a base material, and further, a shaping plate having a convex shape on the surface is provided. A step of placing the surface having the convex shape with the resin sheet side, and hot pressing to obtain a laminate composed of a resin sheet having a concave pattern formed on the surface, a surface layer resin layer, and a base material And a step of supporting a functional substance on the resin sheet on which the concave pattern is formed.
In the method for producing a decorative board according to the present invention, a concave pattern is efficiently transferred by transferring a concave pattern onto the surface of a resin sheet made of an oxidation-resistant resin using a shaping board having a convex shape on the surface. Can be formed.

In the decorative board of the present invention, a functional substance such as a photocatalyst is supported on an oxidation-resistant resin sheet, so that the original function as a functional substance such as antibacterial and antiviral properties can be exhibited. The effect can be maintained for a long time.
Further, when the functional substance is supported on the oxidation-resistant resin sheet, it is possible to prevent the functional substance from contacting the surface resin layer. As a result, discoloration and deterioration of the surface resin layer due to the functional substance can be prevented.
Furthermore, in the decorative board of the present invention, a concave pattern is formed on the surface of the resin sheet on the side where the functional substance is carried. Therefore, even when the resin sheet is made of a water-repellent resin such as a silicone resin or a fluororesin, bacteria and viruses are trapped in the groove with the concave pattern, and thus sufficiently react with a functional substance such as a photocatalyst. Opportunities and time are available and bacteria and viruses can be inactivated. In addition, if the surface has a concave pattern, the surface area of the decorative plate increases, so the amount of functional substances such as photocatalysts can be increased, and bacteria and viruses can be deactivated more efficiently. Can do. Furthermore, since functional materials such as photocatalysts are also supported inside the groove with the concave pattern, even if the decorative material surface is wiped and cleaned, the functional material inside the groove remains without being removed. There is no loss of the inactivation function of bacteria and viruses.

FIG. 1 is a schematic cross-sectional view schematically showing a decorative board according to an embodiment of the present invention. 2 (a), 2 (b), and 2 (c) are schematic cross-sectional views schematically showing a method for manufacturing a decorative board according to an embodiment of the present invention. FIG. 3 is a schematic cross-sectional view schematically showing a conventional decorative board.

Hereinafter, the decorative board of the present invention will be described in detail.
FIG. 1 is a schematic cross-sectional view schematically showing a decorative board according to an embodiment of the present invention.

The decorative board 1 of the present invention has a base material 120 and a surface resin layer 12 made of melamine resin or the like laminated on the surface of the base material 120, and a resin sheet 13 made of an oxidation resistant resin is on the surface resin layer 12. A concave pattern 130 is formed on the surface of the resin sheet 13. Further, the functional substance 14 is supported on the resin sheet 13.

In the decorative board of the present invention, bacteria and viruses are captured by the concave pattern formed on the surface of the resin sheet, the contact probability with a functional substance such as a photocatalyst is increased, and the contact time is also increased. High ability to inactivate bacteria and viruses. Moreover, since the surface area of a decorative board becomes large, the load of functional substances, such as a photocatalyst, can be increased.

In the decorative board of the present invention, the depth of the concave pattern is desirably 10 to 50 μm. If the concave pattern is too deep, functional substances such as photocatalysts will localize and the antiviral properties will decrease. Conversely, if the concave pattern is too shallow, viruses cannot be trapped and the antiviral properties will decrease. .

The base material used for the decorative board of the present invention is not particularly limited, and incombustible base materials such as core paper and magnesia cement generally used for decorative boards can be used. The core paper may be a single core or a laminate in which a plurality of core papers are stacked. The number of core papers is not particularly limited, but can be 1 to 20 sheets. As the core paper, for example, aluminum hydroxide paper can be used. The core paper can be impregnated with a phenol resin. Moreover, a core paper and a magnesia cement incombustible base material can be laminated to form a base material.

The magnesia cement incombustible base material can constitute the base material by using it alone or by stacking and arranging it at the center of the core paper. The magnesia cement incombustible base material is manufactured by mixing magnesium oxide (MgO) and magnesium chloride (MgCl ₂ ), adding aggregate and water, kneading, and forming into a plate shape. As the aggregate, inorganic fibers such as rock wool and glass wool, and organic fibers such as wood chips and pulp can be used. Moreover, in order to raise the intensity | strength of a magnesia cement incombustible base material, the glass fiber layer formed in mesh shape etc. can be provided as an intermediate | middle layer.

The method for forming the surface resin layer on the substrate surface composed of a plurality of or a single core paper and / or magnesia cement incombustible substrate is not particularly limited, and can be performed by a general method. For example, a method in which melamine resin-impregnated paper is laminated on one side or both sides of the substrate and hot-press molding can be used. If the said method is used, the melamine resin of a melamine resin impregnation paper will osmose | permeate core paper, a curing reaction will advance there, and the adhesive force of the melamine resin impregnation paper with respect to a core paper will express.
The resin that can be used for the surface resin layer constituting the decorative board of the present invention includes melamine resin, diallyl phthalate (DAP) resin, polyester resin, olefin resin, vinyl chloride resin, acrylic resin, epoxy resin, urethane resin. , Phenol resin, silicone resin, guanamine resin and the like. In these, it is desirable to use a melamine resin.

Melamine resin is a resin with improved dimensional stability and toughness without impairing optical and visual properties such as translucency. As the melamine resin, known resins can be adopted as long as they are resins having melamine and its derivatives as monomers. The melamine resin may be a resin composed of a single monomer or a copolymer composed of a plurality of monomers. Examples of the melamine derivative include derivatives having a functional group such as an alkoxymethyl group such as an imino group, a methylol group, a methoxymethyl group, or a butoxymethyl group. Further, a compound obtained by reacting a lower alcohol with a melamine derivative having a methylol group and partially or completely etherified can be used as a monomer. Monomethylol melamine, dimethylol melamine, trimethylol melamine, tetramethylol melamine, pentamethylol melamine, hexamethylol melamine and other derivatives having a methylol group (hereinafter referred to as “methylolated melamine”) are copolymerized with melamine as a crosslinking agent. Can be used.

The melamine resin-impregnated paper is produced by impregnating a melamine resin with a predetermined impregnation rate in a pattern paper, and then heating and drying. The pattern paper can be impregnated with the melamine resin by immersing the pattern paper in a melamine resin-containing solution using, for example, an aqueous formaldehyde solution as a solvent. Further, in order to impart bending workability to the melamine resin-impregnated paper, it is possible to impregnate a solution containing a plasticizer together with the melamine resin. As the plasticizer, for example, ε-caprolactam, acetoguanamine, p-toluenesulfonic acid amide, urea and the like can be used. For example, titanium paper is used as the pattern paper. The basis weight of the pattern paper can be set to 80 to 150 g / m ² in consideration of the thickness and weight of the pattern paper. The temperature for heating and drying can be set to 100 to 150 ° C. in order to firmly fix the melamine resin to the pattern paper.

In the decorative board of the present invention, the material of the resin sheet is not particularly limited as long as it is an oxidation resistant resin, but is preferably a silicone resin or a fluororesin. Silicone resins and fluororesins have the property that they are not easily oxidized by functional substances such as photocatalysts. Therefore, by supporting a functional substance on a resin sheet made of silicone resin or fluororesin, it is possible to prevent the functional substance from contacting the surface resin layer and to prevent deterioration of the resin sheet.

As the silicone resin, for example, a silicone resin, a modified silicone oil, or the like can be used. As the modified silicone oil, a silicone oil having one or more functional groups in the molecule can be used. The position at which the functional group is introduced is not particularly limited, and the functional group may be introduced at any position of one end, both ends or side chains of the polysiloxane main chain. Moreover, as a functional group, a hydroxyl group, an amino group, a methoxy group, a hydrazino group, an epoxy group, a methacryl group, a carboxyl group, a carbinol group etc. can be introduce | transduced, for example.

Examples of the fluororesin include polytetrafluoroethylene (PTFE), perfluoroethylene propene copolymer (FEP), perfluoroalkoxyalkane (PFA), tetrafluoroethylene-perfluorodioxole copolymer (TFE / PDD), ethylene Examples thereof include tetrafluoroethylene polymer (ETFE), polyvinylidene fluoride (PVDF), polychlorotrifluoroethylene (PCTFE), and ethylene-chlorotrifluoroethylene copolymer (ECTFE). Furthermore, as fluororesin, use of fluororubber such as polyvinyl fluoride (PVF), vinylidene fluoride (FKM), tetrafluoroethylene-propylene (FEPM), tetrafluoroethylene-perfluorovinyl ether (FFKM), etc. You can also.

In the decorative board of the present invention, the thickness of the resin sheet made of an oxidation-resistant resin is preferably 10 to 1000 μm, and more preferably 50 to 500 μm. By setting the thickness of the resin sheet made of an oxidation resistant resin within the above range, the functional substance can be adhered onto the surface resin layer, and the characteristics of the functional substance are sufficiently exhibited.

In the decorative board of the present invention, the shape of the resin sheet is not particularly limited, and may be appropriately punched into a necessary shape.

In the decorative board of the present invention, the functional substance is desirably a functional material having functions such as antibacterial properties, antiviral properties, antiallergenic properties, and deodorizing properties. For example, examples of the antibacterial and antiviral functional substances include visible light responsive photocatalysts. Specific examples of the visible light responsive photocatalyst include, for example, a titanium oxide carrying a platinum group such as platinum, palladium, rhodium and ruthenium, iron, copper and the like.
In the decorative board of the present invention, the visible light responsive photocatalyst is a platinum-supported titania catalyst, a copper-supported titania catalyst, an iron-supported titania catalyst, a nitrogen-doped titania catalyst, a sulfur-doped titania catalyst, a carbon-doped titania catalyst, or tungsten oxide. It is desirable that the catalyst be a copper-supported titania catalyst. Examples of the copper-supported titania catalyst include anatase-type titanium oxide containing copper in a range of CuO / TiO ₂ (weight% ratio) = 1.0 to 3.5 described in JP-A-2006-232729. Photocatalyst composition in which cuprous oxide (copper oxide (I): Cu ₂ O) and titanium oxide described in Japanese Unexamined Patent Publication No. 2012-210557 are combined, and monovalent copper described in Japanese Patent Application Laid-Open No. 2013-166705 Titanium oxide carrying a mixture containing a compound and a divalent copper compound on the surface, and copper containing titanium oxide containing crystalline rutile-type titanium oxide and divalent copper compound described in International Publication No. 2013/094573 And titanium-containing compositions.

In the decorative board of the present invention, the functional substance is preferably present on the surface of the resin sheet made of an oxidation resistant resin, and a part of the functional substance is embedded in the resin sheet made of the oxidation resistant resin. You may do it. When a part of the functional substance is buried in the resin sheet, it is possible to secure adhesion between the resin sheet and the functional substance and prevent the functional substance from falling off.

The decorative board of the present invention may have a dry body of inorganic sol or a cured body of adhesive on the surface layer of the resin sheet. By immobilizing the functional substance via the dried inorganic sol or the cured adhesive, the functional substance can be more firmly immobilized. As the inorganic sol, silica sol, alumina sol, silica-alumina sol, titania sol and the like can be used, and it is desirable to use silica sol. As the adhesive, an adhesive made of a silicone resin, a fluororesin or the like can be used, and it is desirable to use an adhesive made of a silicone resin.

Next, the manufacturing method of the decorative board of this invention is demonstrated.
In the method for producing a decorative board according to the present invention, a resin-impregnated paper and a resin sheet made of an oxidation-resistant resin are disposed on one or both surfaces of a base material, and further, a shaping plate having a convex shape on the surface is provided. A step of placing the surface having the convex shape with the resin sheet side, and hot pressing to obtain a laminate composed of a resin sheet having a concave pattern formed on the surface, a surface layer resin layer, and a base material And a step of supporting a functional substance on the resin sheet on which the concave pattern is formed.

2 (a), 2 (b), and 2 (c) are schematic cross-sectional views schematically showing a method for manufacturing a decorative board according to an embodiment of the present invention.
As shown in FIG. 2A, after the resin-impregnated paper 22 and the resin sheet 13 are arranged on the base material 120, a shaping plate 31 having a convex shape 32 on the surface is placed. By hot pressing these, the resin-impregnated paper 22 is used as the surface resin layer 12 and a concave pattern 130 is formed on the surface of the resin sheet 13 as shown in FIG. Then, as shown in FIG.2 (c), the functional substance 14 is carry | supported on the resin sheet 13 in which the concave pattern 130 was formed.

First, a surface resin layer is formed on a substrate surface made of a plurality of or a single core paper and / or a magnesia cement incombustible substrate. Since the base material, the manufacturing method thereof, and the surface resin layer have been described in the description of the decorative board of the present invention, they are omitted here.

Although it demonstrated also in the decorative board of this invention, the method of forming a surface layer resin layer on the base-material surface is not specifically limited, It can carry out by a general method. As a specific method for forming the surface resin layer, for example, a lamination step of laminating a resin-impregnated paper such as a melamine resin on one or both sides of a base material made of a core paper laminate, and a resin-impregnated paper such as a melamine resin Examples thereof include a method including a hot-pressure forming step of hot-pressing the laminated base material. If the said method is used, the melamine resin of a melamine resin impregnation paper will osmose | permeate core paper, a curing reaction will advance there, and the adhesive force of the melamine resin impregnation paper with respect to a core paper will express.

As a heating condition at the time of hot pressing, the temperature of the decorative board can be 125 to 150 ° C., and as a pressing condition, 1.96 to 9.80 MPa (20 to 100 kg / cm ² ). Can do. When the temperature is less than 125 ° C. or when the pressure is less than 1.96 MPa, the adhesiveness of the resin-impregnated paper to the substrate is insufficient, and peeling easily occurs. On the other hand, when the temperature exceeds 150 ° C. or when the pressure exceeds 9.80 MPa, cracks may occur.

As described above, in the decorative plate manufacturing method of the present invention, a resin-impregnated paper and a resin sheet made of an oxidation-resistant resin are disposed on a base material, and a shaping plate having a convex shape is placed on the surface. After that, hot pressing is performed. Thereby, while making resin-impregnated paper into a surface layer resin layer, a concave pattern can be formed on the surface of the resin sheet.

As a method for producing the resin sheet, for example, when the resin sheet is made of a silicone resin, a sol solution containing a silicone resin is coated on the release film and dried, and then the release film is removed, etc. Is mentioned. When producing a resin sheet, it is desirable that the sol solution or the like is applied on a release film and then dried in a pressed state. By drying in the pressed state, the flatness of the resin sheet can be further reduced.
Further, the resin-impregnated paper may be impregnated with a silicone resin or a fluororesin.

The resin sheet made of an oxidation-resistant resin before being placed on the resin-impregnated paper is desirably in a semi-cured state. The resin sheet can be completely cured by performing hot-pressure molding after placing the resin-impregnated paper.

Examples of the method of disposing a resin sheet made of an oxidation resistant resin on a resin-impregnated paper include a method of laminating a resin sheet on a resin-impregnated paper, as in the case of laminating a resin-impregnated paper on a substrate. .

By immersing the base material on which the resin sheet is placed in a solution containing the functional substance, the functional substance can be supported on the surface of the resin sheet made of the oxidation-resistant resin. The functional substance may be supported on the surface of the resin sheet made of an oxidation resistant resin by applying or spraying a solution containing the functional substance onto a substrate on which the resin sheet is arranged.

The solution containing the functional substance may further contain an inorganic sol or an adhesive. This is because the immobilization of the functional substance can be reinforced. As the inorganic sol, silica sol, alumina sol, silica-alumina sol, titania sol and the like can be used, and it is desirable to use silica sol. As the adhesive, an adhesive made of a silicone resin, a fluororesin or the like can be used, and it is desirable to use an adhesive made of a silicone resin.

Example 1
(Primary melamine impregnation process)
A roll paper having a thickness of 0.2 to 0.3 mm is immersed in the melamine resin solution. The roll paper is impregnated with the melamine resin by passing the roll paper while being immersed in the solution so that the temperature of the solution is 20 ° C. and the immersion time is 2 minutes. The moving speed of the roll paper is 10 to 20 cm / second.
(Drying process)
The roll paper that has passed through the melamine resin solution is dried by a dryer so that the temperature is 100 ° C. and the drying time is 30 seconds.

(Secondary melamine impregnation process)
The roll paper which passed through the drying process is immersed in the melamine resin solution. The roll paper is impregnated with the melamine resin by passing the roll paper while being immersed in the solution so that the temperature of the solution is 20 ° C. and the immersion time is 30 minutes. The moving speed of the roll paper is 10 to 20 cm / second.
(Drying / cutting process)
The roll paper that has passed through the melamine resin solution is dried by a dryer so that the temperature is 100 ° C. and the drying time is 2 hours. After drying, cut into 910 mm × 1820 mm.

(Resin sheet forming process)
A silicone-coated film (silicone resin sheet) is obtained by applying an acrylic silicon resin emulsion (PCU-103, manufactured by Titanium Industry Co., Ltd.) to a thickness of 10 μm as a silicone binder on a polyethylene terephthalate film having a thickness of 50 μm.

(Combination process)
Four phenol resin-impregnated core papers having a thickness of 0.3 to 0.4 mm are laminated, and the melamine resin-impregnated paper and the silicone resin sheet obtained by the above process are laminated thereon. Furthermore, on the silicone resin sheet, a stainless molding plate having a number of convex shapes on the surface is placed so that a depression of a wood conduit shape can be formed on the surface of the silicone resin sheet by transfer.
Heating and pressurization is performed with a press at a temperature of 170 ° C., a pressure of 50 kg / cm ² , and a time of 100 minutes. As a result, the silicone resin sheet is fixed on the melamine resin impregnated layer, and a concave shape like a wood conduit is formed on the surface of the silicone resin sheet by transferring the convex shape of the shaping plate.

(Photocatalyst loading process)
Methanol containing a slurry in which a photocatalyst of CuO—TiO _{2 having} an average particle size of 100 nm is dispersed in water and silica sol (SiO ₂ concentration: 3 wt%) in a weight ratio (solid content weight) of 4.5: 5.5. A mixed solution (photocatalyst concentration 0.05% by weight) is prepared. The above-mentioned photocatalyst was supported on the silicone resin sheet by applying the methanol mixed solution to the base material having the silicone resin sheet obtained in the above step on the surface using a spray and drying at 25 ° C. for 12 hours. Completed the production of decorative panels.

(Comparative Example 1)
Although it is the same as that of Example 1, it heat-presses without using the shaping board provided with the convex shape on the surface.

(Evaluation of omission of functional substances)
After wiping the surface of the decorative board obtained in Example 1 and Comparative Example 1 using a cloth containing alcohol, the decorative board surface is observed with an optical microscope.
As a result, in the decorative board of Example 1, it can be confirmed that the TiO ₂ particles remain inside the groove having the concave pattern. On the other hand, in the decorative board of Comparative Example 1, it can be confirmed that the TiO ₂ particles are completely removed from the surface. Thus, in Example 1, it is estimated that the effect of functionality is maintained. On the other hand, it is estimated that the effect of functionality is not maintained in Comparative Example 1.

(Antiviral evaluation)
In order to evaluate the antiviral property of the decorative board carrying the photocatalyst obtained in Example 1 and Comparative Example 1, measurement relating to the antiviral property was performed in accordance with the antiviral property test method of the JIS R1756 visible light responsive photocatalytic material. I do. The measurement result is expressed as the concentration of virus inactivated against E. coli. Here, the concentration of virus inactivated against E. coli (virus inactivity) is used as an indicator of virus concentration. Virus inactivity is an antiviral test using bacteriophage, and the concentration of virus capable of infecting E. coli is measured by using phage virus Qβ concentration: 8.3 million / ml. On the other hand, the concentration of the inactivated virus is calculated. That is, the virus inactivity is a degree of concentration at which E. coli cannot be infected with respect to the phage virus Qβ concentration, and (phage virus Qβ concentration−virus concentration capable of infecting E. coli) / (phage virus Qβ concentration) × 100. It can be said that the higher the virus inactivation value, the better the antiviral properties.
The concentration of virus capable of infecting E. coli is measured as follows. A test solution having a known phage virus concentration (8.3 million pieces / milliliter) is dropped on a decorative plate and irradiated with light according to JIS R1756 to inactivate the virus, and then the decorative plate is washed with a predetermined amount of water. This is diluted 1000 times, transplanted and cultured in an E. coli medium, and the number of inactivated viruses is counted. The concentration of virus capable of infecting E. coli is calculated from the number of inactivated viruses, the amount of water used for washing, and the dilution rate.

The decorative plates of Example 1 and Comparative Example 1 were evaluated when placed on the petri dish with respect to the bottom of the petri dish (Test 1) and when placed at an angle of 45 ° (Test 2).

In Test 2, a test solution containing a phage virus is dropped on the upper end of the decorative board. Although the test liquid flows downward on the decorative plate surface, in the decorative plate of Example 1, the test solution stops in the decorative plate and does not reach the bottom of the petri dish. On the other hand, in the decorative board of Comparative Example 1, the dropped test solution flows down from the decorative board to the bottom of the petri dish. In this state, after irradiating light according to JIS R1756 to inactivate the virus, the decorative board and petri dish of Comparative Example 1 are washed together, and antiviral properties are evaluated by the methods described above.

In Test 1, measurement is performed according to JIS R1756.
In Test 1, both the decorative plates of Example 1 and Comparative Example 1 had a virus concentration capable of infecting E. coli of 3320 / ml or less, which corresponds to 99.96% or more in terms of virus inactivity.

In Test 2, in the decorative board of Example 1, the concentration of virus capable of infecting E. coli was 4150 cells / milliliter or less, and 99.95% or more in terms of virus inactivity, The virus inactivity is almost 0%.
In the present invention, even when the bacteria and viruses is flowing with the fluid in the veneer surface, it is possible to hold the virus, non Katsudo virus is not decreased.

1,3 Decorative plate 12 Surface resin layer 13 Resin sheet 14 Functional substance 22 Resin impregnated paper 31 Molding plate 32 Convex shape 120 Base material (phenol resin impregnated paper)
130 Recessed Pattern

Claims (7)

A substrate;
A surface resin layer laminated on one or both surfaces of the substrate;
A resin sheet made of an oxidation-resistant resin disposed on the surface resin layer;
A photocatalyst carried on the resin sheet,
The oxidation-resistant resin is made of a water-repellent resin,
On the surface of the resin sheet on the side on which the photocatalyst is supported, a groove with a concave pattern is formed ,
Antiviral veneer that the photocatalyst in the groove inside the recess pattern is characterized Rukoto such is supported. The antiviral decorative board according to claim 1, wherein a depth of the groove of the concave pattern is 10 to 50 μm. The antiviral decorative board according to claim 1, wherein the resin sheet made of the oxidation resistant resin is made of a silicone resin or a fluororesin. The antiviral decorative board according to any one of claims 1 to 3, wherein the resin sheet has a thickness of 10 to 1000 µm. The antiviral decorative board according to any one of claims 1 to 4, wherein the photocatalyst is a visible light responsive photocatalyst. 6. The visible light responsive photocatalyst is a platinum-supported titania catalyst, a copper-supported titania catalyst, an iron-supported titania catalyst, a nitrogen-doped titania catalyst, a sulfur-doped titania catalyst, a carbon-doped titania catalyst, or a tungsten oxide. Antiviral decorative veneer. A resin-impregnated paper and a resin sheet made of an oxidation-resistant resin are arranged on one or both surfaces of the substrate, and further, a shaping plate having a convex shape on the surface is provided, and the surface having the convex shape is arranged on the resin sheet side. And the process of placing
A step of obtaining a laminate composed of a resin sheet, a surface layer resin layer, and a base material in which grooves having a concave pattern are formed on the surface by hot-pressing these,
A step of supporting a photocatalyst on the resin sheet in which the groove having the concave pattern is formed;
Only including,
The oxidation-resistant resin is made of a water-repellent resin,
In the step of supporting the photocatalyst on the resin sheet, the photocatalyst is supported inside the groove having the concave pattern, and the method for producing an antiviral decorative board is characterized in that:

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