JP3231037U - Wood-based materials with antibacterial properties and furniture equipped with them - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wood-based member having antibacterial activity, which can exert an antibacterial action regardless of the installation location of the furniture to be incorporated, has a titanium oxide photocatalyst held on the surface, is hard to peel off, and has excellent durability, and furniture provided with the same. provide.
SOLUTION: A wood-based base material 40, an intermediate layer 30 formed on the surface of the wood-based base material 40, a silver compound 20 held on the surface of the intermediate layer 30, and held on the surface of the intermediate layer 30. A wood-based member 50 having antibacterial properties, having a titanium oxide photocatalyst 10 and having a pencil hardness of 3H or more on the surface on which the silver compound 20 and the titanium oxide photocatalyst 10 are held. Further, a piece of furniture selected from the group consisting of storage furniture, a table, a chair and a bed, which is provided with at least a part of a wooden member 50.
[Selection diagram] Fig. 1

Description

The present invention relates to a wood-based member having antibacterial properties and furniture provided with the same.

Furniture used for antibacterial and deodorizing actions by photocatalyst is known. For example, Patent Document 1 describes a photocatalyst surface-treated wooden furniture composed of deodorizing and sterilizing members, which includes a book shelf, a table, a chair, a bed, and a clog box as the wooden furniture facing the inside of a room. 50 to 100 on the entire surface of one or more members selected from the surface, the shelves and counters in each piece of furniture, the armrests that are touchable, and the wooden frame of the backrest. A photocatalyst surface-treated wooden furniture incorporating a wood member treated with a photocatalyst functional paint having a deodorizing function and a bactericidal function coated with a titanium oxide-based photocatalyst in an area ratio of% is disclosed.

Patent Document 2 describes a housing in which at least a part of the wall surface is made of wood, a tray for hydroponic cultivation installed in the housing, and a wavelength suitable for plant cultivation, which is installed in the housing. A storage furniture having a light source that irradiates light and a catalyst layer that is formed on at least the inner wall surface of the housing and exerts a photocatalytic function with light having a wavelength of the light source is disclosed.

Registered Utility Model No. 3191346 International Publication No. 2017/0335223

Titanium oxide exerts its effect as a photocatalyst by exciting electrons by ultraviolet rays in sunlight. On the other hand, furniture may be placed not only near the window where sunlight hits, but also in a deep place where sunlight is hard to hit, and when it is placed in a place where sunlight is hard to hit, it can fully exert its antibacterial function. I couldn't say that.

In addition, furniture such as tables are cleaned on a daily basis by wiping off dust and dirt on the surface with a cloth. Even in such a usage environment where friction is applied with a cloth or the like on a daily basis, it is required that the treated layer such as titanium oxide is not easily peeled off. However, conventionally, it cannot be said that the resistance to peeling and the durability have been sufficiently studied.

In view of these circumstances, the object of the present invention is to exhibit an antibacterial action regardless of the installation location of the furniture to be incorporated, the titanium oxide photocatalyst held on the surface is hard to peel off, and the wood system has excellent durability and antibacterial properties. It is to provide the members and the furniture equipped with them.

The present invention comprises a wood-based substrate, an intermediate layer formed on the surface of the wood-based substrate, a silver compound retained on the surface of the intermediate layer, and a titanium oxide photocatalyst retained on the surface of the intermediate layer. It is applied to a wood-based member having antibacterial properties and having a pencil hardness of 3H or more on the surface on which the silver compound and the titanium oxide photocatalyst are held.

Since the silver compound and the titanium oxide photocatalyst are held on the surface of the wood-based member of the present invention via the intermediate layer, it can exert an action such as antibacterial action even in a place where sunlight is hard to hit. Since the surface of a wood-based base material having a conduit on the surface such as a veneer is rougher than that of a base material such as metal or plastic, if the titanium oxide photocatalyst is held directly on the surface of the wood-based base material, it will be inside the conduit. It becomes difficult to get in and exert the action of the photocatalyst. Further, by having the intermediate layer, the surface has appropriate irregularities, and the silver compound and the titanium oxide photocatalyst can be firmly held. Further, since the pencil hardness of the surface on which the silver compound and the titanium oxide photocatalyst are held is 3H or more, the silver compound and the titanium oxide photocatalyst are hard to peel off, and the antibacterial action and the like are maintained for a long period of time.

Further, in the wood-based member of the present invention, the intermediate layer is formed by applying a water-based paint or a urethane paint containing a peroxotitanium complex, and the silver compound and the titanium oxide photocatalyst are the silver compound and the above. By applying a water-based paint containing a titanium oxide photocatalyst and a peroxotitanium complex, it can be retained on the surface of the intermediate layer.

Further, the present invention relates to furniture provided with at least a part of the wood-based member. The furniture can be any selected from the group consisting of storage furniture, tables, chairs and beds. By incorporating the wood-based member, furniture having an antibacterial function or the like can be obtained.

According to the present invention, a wood-based member having antibacterial activity, which can exert an antibacterial action regardless of the installation location of the furniture to be incorporated, has a titanium oxide photocatalyst held on the surface, is hard to peel off, and has excellent durability, is provided. Furniture is provided.

It is a perspective view of the wood-based member which concerns on this invention. It is a partially enlarged schematic view of the surface portion of the wood-based member shown in FIG. It is a perspective view of the table provided with the wood-based member which concerns on this invention. It is a perspective view of the storage furniture provided with the wood-based member which concerns on this invention. It is a perspective view of the storage furniture provided with the wood-based member which concerns on this invention. It is a scanning micrograph of a member in which titanium oxide-silver-containing water-based paint was applied to half of the base material. It is a percent graph of the component by the scanning microscope of the member which applied the titanium oxide-silver-containing water-based paint to half of the base material.

<Wooden parts>
FIG. 1 is a perspective view of the wood-based member 50 according to the present invention, and FIG. 2 is a partially enlarged schematic view of a surface portion of the wood-based member 50 shown in FIG. The wood-based member 50 is held on the surface of the wood-based base material 40, the intermediate layer 30 formed on the surface of the wood-based base material 40, the silver compound 20 held on the surface of the intermediate layer 30, and the surface of the intermediate layer 30. It has a titanium oxide photocatalyst 10 and the like.

(Wooden base material)
The wood-based base material 40 is solid wood, veneer, decorative plywood, printed plywood, or the like. The shape of the wood-based base material 40 is plate-shaped, but is not limited to this, and any shape such as rod-shaped, bow-shaped, or frame-shaped is arbitrary.

(Middle layer)
The intermediate layer 30 is a layer formed by applying a water-based paint containing a peroxotitanium complex, a urethane paint, or the like to the surface of a wood-based base material 40 and drying it. As the water-based coating material containing the peroxotitanium complex, Aliteras UN manufactured by Nippon Nanotech Co., Ltd. or the like can be used. The thickness of the intermediate layer 30 is 0.1 to 30 μm or 10 to 30 μm. The thickness of the intermediate layer can be determined, for example, by observing the cross section of the wood-based member 50 using an optical microscope and taking the average value of the thicknesses of the three measured points.

(Silver compound)
The silver compound 20 retained on the surface of the intermediate layer 30 may contain silver, and examples thereof include silver ions, metallic silver, and silver complexes. For example, silver nanoparticles can be used as the silver compound. The silver ion can be retained by adding a silver compound capable of releasing silver ion by dissolving in water to the water-based paint, applying it on the intermediate layer 30, and drying it. Further, by adding metallic silver or silver complex to the paint, applying it on the intermediate layer 30, and drying it, the metallic silver or silver complex can be retained on the surface of the intermediate layer 30.

(Titanium oxide photocatalyst)
The titanium oxide photocatalyst 10 held on the surface of the intermediate layer 30 is a polyhedral type (for example, a spear type) having a diameter of 10 to 30 nm. The titanium oxide photocatalyst 10 is preferably polyhedral, but is not limited to this, and may be spherical particles, elliptical particles, or the like. Further, the size (particle size) of the titanium oxide photocatalyst 10 can be measured by, for example, a laser diffraction method.
Further, the area occupied by the titanium oxide photocatalyst 10 is 1 to 5 area% with respect to the area of the surface of the wood-based base material 40 on which the titanium oxide photocatalyst 10 is held. Further, the titanium oxide photocatalyst 10 and the silver compound 20 are, for example, in terms of mass ratio, such as titanium oxide photocatalyst 10: silver compound 20 = 50: 1 to 10000: 1, 50: 1 to 1000: 1, 50: 1 to 100 :. It can be adjusted arbitrarily such as 1.

In addition, components other than the titanium oxide photocatalyst 10 and the silver compound 20 may be retained on the surface of the intermediate layer 30. For example, the titanium oxide photocatalyst 10 and the silver compound 20 are coated with an aqueous coating material containing the titanium oxide photocatalyst 10 and the silver compound 20 and a peroxotitanium complex (for example, Aritella IC manufactured by Nippon Nanotech Co., Ltd.) on the surface of the intermediate layer 30. Can be held by.

(Pencil hardness)
The photocatalyst layer 20 has a pencil hardness of 3H or more. The pencil hardness is determined by a pencil hardness measuring method based on JIS K5400.

(Wooden parts)
Like the wood-based base material 40, the wood-based member 50 has an arbitrary shape such as a plate shape, a rod shape, an arch shape, or a frame shape. Specifically, shelf plate members, top plate members, side plate members, back plate members, front plate members, front plate members, bottom plate members, leg members, handrail members, armrest members, frame members, frame members, door plate members, etc. Can be.
In the wood-based member 50, the intermediate layer 30 is formed only on one of the surfaces perpendicular to the thickness direction of the plate-shaped wood-based base material 40, and the titanium oxide photocatalyst 10 and the silver compound are formed on the surface of the intermediate layer 30. Although 20 is retained, the titanium oxide photocatalyst 10 and the silver compound 20 may be formed in a region to which antibacterial properties are desired to be imparted. In order to retain the titanium oxide photocatalyst 10 and the silver compound 20 on the entire surface of the wood-based base material 40, an intermediate layer 30 is formed on the entire surface of the wood-based base material 40, and the titanium oxide photocatalyst 10 and the titanium oxide photocatalyst 10 and the surface of the intermediate layer 30 are further formed. The silver compound 20 may be retained. Preferably, when incorporated into furniture, an intermediate layer 30 is formed on at least the upper surface and / or the front surface, and the titanium oxide photocatalyst 10 and the silver compound 20 are retained.

(Manufacturing of wood-based materials)
The wood-based member 50 is coated with an intermediate layer-forming paint on the surface of the wood-based base material 40 and dried to form an intermediate layer 30, and then a water-based paint (aqueous solution) containing a titanium oxide photocatalyst 10 and a silver compound 20 is applied. It can be manufactured by irradiating it with far infrared rays and drying it. By irradiating with far infrared rays and drying, the surface on which the titanium oxide photocatalyst 10 and the silver compound 20 are held becomes harder than before, and the titanium oxide photocatalyst 10, the silver compound 20, and the intermediate layer 30 are hard to peel off. The antibacterial effect lasts for a longer period of time. By assembling furniture using the wood-based member 50, the furniture can be easily provided with functions such as antibacterial action.

Further, after assembling the furniture using the member having the intermediate layer 30 formed on the surface of the wood-based base material 40, the titanium oxide photocatalyst 10 and the silver compound are formed on the surface of the member constituting the portion to be provided with the antibacterial function and the like. It is also possible to hold the titanium oxide photocatalyst 10 and the silver compound 20 on the surface of the intermediate layer 30 by applying the water-based paint containing 20.

Further, after assembling the furniture, an intermediate layer forming paint is applied to the surface of the wood-based base material 40 constituting the portion to be provided with the antibacterial function and dried, and the water-based paint containing the titanium oxide photocatalyst 10 and the silver compound 20 is contained. It is also possible to retain the titanium oxide photocatalyst 10 and the silver compound 20 on the surface of the intermediate layer 30 by applying the above.

As the intermediate layer forming paint, for example, Ariterasu UN manufactured by Nippon Nanotech Co., Ltd. can be used as described above. Further, for example, a one-component polyurethane resin paint, a two-component polyurethane resin paint using a main agent and a curing agent, a one-component acrylic polyurethane resin paint, a two-component acrylic polyurethane paint, and other urethane paints should be used. You can also. For the intermediate layer 30, for example, the wood-based base material 40 is dried at 55 to 65 ° C. for 5 to 15 minutes, and then the intermediate layer forming paint is applied to a film thickness of 5 to 18 μm, and the intermediate layer 30 is 5 to 45 ° C. It can be formed by drying for 15 minutes.

The water-based paint contains a titanium oxide photocatalyst 10 and a silver compound 20, and uses water so that the titanium oxide photocatalyst 10 is 0.8 to 5% by mass and the silver compound 20 is 0.8 to 200 ppm. It is preferable to adjust. For example, by using Aliteras IC manufactured by Nippon Nanotech Co., Ltd. as an aqueous coating material containing the titanium oxide photocatalyst 10 and the silver compound 20, the titanium oxide photocatalyst 10 and the silver compound 20 can be retained on the surface of the intermediate layer 30. If the coating thickness of the water-based paint is too thick, powder blowing is likely to occur, and if it is too thin, it is difficult to apply the water-based paint uniformly. Therefore, the coating thickness is preferably 0.1 to 5 μm, more preferably 1 to 5 μm. For example, it can be uniformly applied by spraying a water-based paint with a spray gun so that the coating thickness is 0.1 to 5 μm from a distance of about 3 to 5 cm from the wood-based base material.

A known infrared heater can be used to irradiate and dry infrared rays. The titanium oxide photocatalyst and the silver compound can be retained on the surface of the intermediate layer by, for example, drying at 60 to 80 ° C. for 5 to 10 minutes using a far-infrared heater.

<Furniture>
The wood-based member according to the present invention is used as a member for assembling furniture. The furniture can be any selected from the group consisting of storage furniture, tables, chairs and beds. The storage furniture is not particularly limited, but includes a cupboard, a book shelf, a shoe rack, and a floor head stand.

FIG. 3 is an example of a table provided with wood-based members. The table 200 includes a wooden member as the top plate 60, and leg members 62 connected to each of the four corners of the top plate 60. The top plate 60 is a wood-based member formed by applying an intermediate layer-forming paint on the upper surface and side surfaces thereof, and further applying a water-based paint containing a titanium oxide photocatalyst and a silver compound.

The storage furniture 210 shown in FIG. 4 includes a top plate 70, a pair of side plates 71, a back plate 72, and a floor plate 73, and a plurality of internal spaces are vertically partitioned into an internal space formed of these plate materials. The shelf board 74 is arranged. The front is provided with three doors 75 that can be opened and closed forward. Further, in the storage furniture 210, the floor plate 73 and the wood-based member formed by applying the intermediate layer-forming paint on the entire surface of the wood-based base material and further applying the water-based paint containing the titanium oxide photocatalyst and the silver compound are used. It is incorporated as a shelf board 74.

The storage furniture 220 shown in FIG. 5 is divided into upper and lower parts by a partition plate 85 provided in the central portion of an internal space formed of four plate members of a counter plate 81, a pair of side plates 82, a top plate 83, and a back plate 84. The first accommodating portion 80 is provided, five spaces having two stages on the right side and three stages on the left side, and a second accommodating portion 90 provided with four drawers 91. The upper part of the first accommodating portion 80 is a shelf portion 86, and the shelf portion 86 is arranged with a plurality of shelf plates 87 for partitioning the internal space vertically and partition plates 88 for partitioning left and right, and 2 on the front surface. The door plates 89 are attached to the left and right so as to be openable and closable. In the storage furniture 220, wooden members are incorporated as members constituting the counter plate 81, the partition plate 85, the shelf plate 87, and the front surface, side surface, back surface, and floor surface of the drawer 91. At this time, the surface on which the titanium oxide photocatalyst and the silver compound are held is the upper surface of the counter plate 81, the partition plate 85, and the shelf plate 87, and is the inner surface of the drawer 91. It is built into.

The wood-based member 50 described with reference to FIGS. 1 and 2 exemplifies the wood-based member according to the present invention, and the furniture 200, 210, 220 described with reference to FIGS. 3 to 5 relates to the present invention. The present invention exemplifies furniture provided with wood-based members, and the present invention is not limited thereto.

Hereinafter, the present invention will be described in more detail with reference to Examples, but the present invention is not limited to the following Examples as long as the gist of the present invention is not exceeded.

(Example 1)
Aritella UN manufactured by Nippon Nanotech Co., Ltd. was applied to the surface of the base material (veneer) to a thickness of 13 to 18 μm, and air-dried at 40 ° C. for 6 to 10 minutes. Next, using a spray gun, apply Ariterasu IC (titanium oxide-silver-containing water-based paint) manufactured by Nippon Nanotech Co., Ltd. to a thickness of 1 to 5 μm, and use an infrared heater (manufactured by NGK Insulators) at 60 to 80 ° C. 5 It was dried for 10 minutes to produce a surface treatment member (veneer).

(Evaluation of surface treatment members)
FIGS. 6 and 7 show scanning micrographs and percentage graphs of the components of the members coated with the titanium oxide-silver-containing water-based paint on half of the base material (veneer). As shown in FIG. 6, it was confirmed that the titanium oxide photocatalyst was retained. Further, 1.5% of titanium oxide was present in the surface-treated member (veneer) manufactured as shown in FIG. 7.

(Antibacterial)
When the titanium oxide-silver-containing water-based paint applied and the one without the water-based paint were evaluated using Lumitester (registered trademark), the values of the one coated with the water-based paint decreased significantly. It was confirmed that the number of bacteria was small.

(Pencil hardness)
The pencil hardness of the one dried using an infrared heater and the one dried by natural drying was evaluated by a method based on JIS-K-5400. As a result, the one dried using the infrared heater was 3H, but the one dried naturally was 3B.

(Example 2)
A surface-treated member (solid plate) was manufactured in the same manner as in Example 1 by using a base material (solid plate) instead of the base material (veneer). When the distribution of titanium oxide on the surface of the manufactured surface treatment member (solid plate) was evaluated by a scanning microscope, 2% of titanium oxide was present.

(Example 3)
A surface treatment member (printed board) was manufactured in the same manner as in Example 1 by using a base material (printed (veneer) board) instead of the base material (veneer). When the distribution of titanium oxide on the surface of the manufactured surface treatment member (printed circuit board) was evaluated by a scanning microscope, 2.9% of titanium oxide was present.

10 Titanium oxide photocatalyst 20 Silver compound 30 Intermediate layer 40 Wood-based base material 50 Wood-based member 60, 70, 83 Top plate 62 Leg member 71, 82 Side plate 72, 84 Back plate 73, Floor plate 74, 87 Shelf plate 75, 89 Door 80 1st storage 81 Counter board 85, 88 Partition board 86 Shelf 90 2nd storage 91 Drawer 200 Table 210, 220 Storage furniture

Claims (3)

It has a wood-based base material, an intermediate layer formed on the surface of the wood-based base material, a silver compound held on the surface of the intermediate layer, and a titanium oxide photocatalyst held on the surface of the intermediate layer. And
A wood-based member having antibacterial properties and having a pencil hardness of 3H or more on the surface on which the silver compound and the titanium oxide photocatalyst are held. The intermediate layer is formed by applying a water-based paint containing a peroxotitanium complex or a urethane paint.
The wood-based member according to claim 1, wherein the silver compound and the titanium oxide photocatalyst are held on the surface of the intermediate layer by applying an aqueous coating material containing the silver compound, the titanium oxide photocatalyst and a peroxotitanium complex. .. Furniture provided with at least a part of the wood-based member according to claim 1 or 2.
Furniture that is one of the choices from the group consisting of storage furniture, tables, chairs and beds.

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