JP2555523B2 - Veneer - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a decorative plate, and more particularly to a decorative plate having a medium specific gravity fiber plate on the surface of which an arbitrary pattern is printed.

[0002]

2. Description of the Related Art Medium specific gravity fiberboard has a specific gravity of 0.4 to 0.8.
However, since it is relatively lightweight, it has excellent strength properties and good workability, it is used as a building material after being subjected to optional makeup as required.

[0003] In the case of the medium specific gravity fiberboard, for example, when a dry method is used, an adhesive is applied to wood fibers obtained by defibrating hardwood or softwood, and this is formed and temporarily pressed to form a fiber mat. It is obtained by cutting a fiber mat into a fixed size to obtain a fixed-size mat, and then heating and pressing.

[0004]

The medium-density fiberboard has a weak surface and is porous because it forms a plate-like body by entanglement of wood fibers and solidification of an adhesive. Therefore, when a decorative coating film is formed on the surface of the medium specific gravity fiber board, there is a drawback that the adhesion force of the coating film is weak and the durability is poor.

The present invention aims to solve this drawback and to provide a decorative board on which a paint pattern is clearly formed.

[0006]

Means for Solving the Problems The present invention, which has been completed after earnest efforts to achieve the above object, uses a medium specific gravity fiber board having a hard layer having a high specific gravity on at least the surface as a substrate, and the hard layer The decorative board is characterized in that after a base treatment is applied thereon, an arbitrary pattern pattern is formed by printing, and a coating layer made of an overcoat transparent paint is further formed on the surface of the decorative board.

The medium specific gravity fiberboard has an overall specific gravity of 0.4 to 0.8.
Although it is excellent in light weight, workability, and handleability, a hard layer having a high specific gravity is exposed on one or both surfaces.
This hard layer has a specific gravity of 0.8 to 1.4,
It has a layer thickness of about 0.5 mm.

As described above, the medium specific gravity fiberboard is defibrated and added with an adhesive or the like, and dried wood fibers are deposited on the screen conveyor by a forming device in the manufacturing process of the wood fiberboard by the dry method, for example. Then, it is temporarily pressed to obtain a wood fiber mat, and then cut into a certain size to obtain a standard length wood fiber mat, which is then heat pressed to obtain an adhesive for wood fibers. By increasing the addition amount of or by increasing the water content of the wood fiber, the layer thickness of the hard layer on one side or both sides can be increased.

Further, water is applied to the upper or lower surface of the fixed-length wood fiber mat, or a water-retaining sheet-like material such as non-woven fabric, paper or cloth is impregnated with water on the upper or lower surface of the wood fiber mat. By mounting and heating in this state, it is heated and pressed in a state where the water content of the front and back portions is increased, so that it is formed on the water application surface or the mounting surface side of the sheet-like material. The hard layer has a large layer thickness.

In this way, a medium-density fiberboard having a hard layer having a predetermined thickness on one or both sides is obtained.

In the obtained medium specific gravity fiber board, a thin surface layer having a low specific gravity is formed by precure of the adhesive at the time of heating and pressing, so at least the surface side is sanded to remove the low specific gravity thin surface layer, Expose the hard layer.

The hard layer having a high specific gravity formed on at least the surface of the medium specific gravity fiberboard is subjected to a base treatment such as a sealer treatment and a coloring treatment to strengthen the material and color the material, and then gravure printing, gravure offset printing, An arbitrary pattern is printed by screen printing, transfer printing, or the like.

In the inks and paints for forming the pattern, there are fragrances such as natural essential oils and synthetic fragrances, deodorants, insect repellents,
One or more kinds of agents such as pest repellents can be added. Thereby, a decorative board having required effects such as a forest bathing effect, an aroma effect, a deodorizing effect, an insect repellent effect, a pest repellent effect, and a bactericidal effect is obtained. These agents may be added directly as they are, or may be added in the form of emulsion or microcapsule.

Before or after the pattern is printed, an embossed pattern may be formed on the surface of the decorative plate. In this case, arbitrary colored coating can be applied in the concave portions having the uneven pattern.

A colorless transparent or colored transparent topcoat transparent coating material is applied to the surface on which the pattern is printed to form a coating layer.

Mineral particles are added to and mixed with the transparent top coat. The mineral particles include silicon carbide, aluminum oxide, silicon oxide, borax, boron carbide and the like having a particle diameter of 10 to 200 μm, and preferably have a new Mohs hardness of 10 or more. The addition amount of the mineral particles is preferably set to 10 to 95% based on the solid content (non-volatile component) of the coating resin.

As the mineral particles, plural kinds of particles having different particle sizes may be added and mixed. For example, it is possible to add 10 to 50 μm of aluminum oxide powder as fine mineral particles and 50 to 150 μm of silicon carbide powder as coarse mineral particles. By adding coarse particles and fine particles of fine particles having different particle sizes in this way, the fluidity of the coating material is increased by the addition of fine particles and the coating material is uniformly dispersed, so that it is possible to improve wear resistance. Since the bearing effect of the fine particles in the paint improves the dispersibility of the coarse particles and the anti-settling property, the coarse particles are also uniformly dispersed, and the wear resistance in the long term can be improved.

As the top coat transparent paint, synthetic resin paints such as aminoalkyd resin paints, vinyl resin paints, acrylic resin paints, epoxy resin paints, polyurethane resin paints and unsaturated polyester resin paints are generally used.

Further, an ultraviolet curable resin coating material may be used as the top coat transparent coating material. The UV-curable resin coating cures in a short time, does not cause air pollution because it is a solvent-free type, and is easy to handle because it is a one-component type. It has the effect of preventing the occurrence of warpage of the decorative plate without affecting.

One or more kinds of chemicals such as aromatics composed of natural essential oils and synthetic fragrances, deodorants, insect repellents, pest repellents and the like can be added to the top transparent paint. Thereby, a decorative board having required effects such as a forest bathing effect, an aroma effect, a deodorizing effect, an insect repellent effect, a pest repellent effect, and a bactericidal effect is obtained. These agents may be added directly as they are, or may be added in the form of emulsion or microcapsule.

When a solvent-type topcoat transparent coating is used in the formation of an abrasion-resistant coating layer, the volume of the solvent is reduced due to the release of the solvent into the atmosphere at the time of the impression curing, and therefore, the mineral particles are The coating layer may be cured while protruding from the coating layer. In this case, roughness occurs on the surface,
The occurrence of a matte state is observed, which is not preferable. Therefore, it is desirable to form a protective coating film layer by applying a transparent coating material on the surface after forming a wear-resistant coating film layer by applying a top coating transparent coating material containing mineral particles.
This gives a smooth and glossy decorative surface.

Abrasion resistance can be imparted by adding and mixing mineral particles in the transparent coating material forming the protective coating layer. In this case, it is preferable that the mineral particles have a particle diameter smaller than that of the mineral particles contained in the top-coating transparent paint, and the surface roughness and matte state are suppressed.

As described above, a medium specific gravity fiberboard having a hard layer having a high specific gravity on at least the surface thereof is used as a substrate, and after subjecting the hard layer to a base treatment, an arbitrary pattern pattern is formed by printing. The decorative board of the present invention is characterized in that a coating film layer made of a transparent topcoat is formed on the surface thereof.

[0024]

[Function] Since the pattern print is formed on the hard layer having high specific gravity, the inhalation of ink or paint is substantially prevented,
The pattern is clearly formed without bleeding.

[0025]

EXAMPLE FIG. 1 shows an example of the constitution of a decorative board of the present invention, in which a medium specific gravity fiber board 1 is used as a substrate, a hard layer 2 having a high specific gravity on the surface thereof, an undercoating layer 3 and an optional pattern printing layer. 4 and a coating layer 5 made of a transparent topcoat are sequentially laminated.

[0026]

According to the present invention, a decorative board on which an arbitrary pattern is clearly printed can be obtained.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a configuration example of a decorative board according to the present invention.

[Explanation of symbols]

 1 Medium specific gravity fiberboard (substrate) 2 Hard layer 3 Base treatment layer 4 Arbitrary pattern printing layer 5 Coating layer

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Claims (1)

(57) [Claims] 1. A medium specific gravity fiber board having a hard layer having a high specific gravity on at least the surface thereof is used as a substrate, and after subjecting the hard layer to an undercoating treatment, an arbitrary pattern is formed by printing, and the surface thereof is overcoated. A decorative board characterized by being formed with a coating layer of transparent paint.