JPH0469879B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention is applicable to wooden fixtures such as tables, counters, furniture, audio equipment cases, wooden building materials such as flooring and wall materials, and surface materials for car interior fixtures. Regarding the wood-based decorative board that is suitably used, a colored opaque resin layer in which small pieces of wood are dispersed is provided, and the small pieces of wood are exposed on the surface of this resin layer to emphasize the beauty of the wood pieces mixed in. be.

[Conventional technology]

This type of decorative board is known, for example, in which a large number of small pieces of wood are mixed into a transparent hardening resin liquid such as an unsaturated polyester resin, and this mixture is formed into a plate shape and solidified.

[Problem that the invention seeks to solve]

However, since this decorative board is made by kneading and solidifying resin liquid and small pieces of wood, the sides of the small pieces of wood are often not parallel to the surface of the decorative board, and the surface pattern of the small pieces of wood is not efficient. There were complaints that the surface of the decorative board did not show the beauty of the small pieces of wood.

[Means for solving problems]

In this invention, a colored opaque resin layer in which wood chips are dispersed is provided on a substrate, one side of the wood chips in the colored opaque resin layer is exposed to the surface of this layer, and the exposed ratio of the side surface of the wood chips is 10 of surface area
The solution was to flatten the surface and provide a transparent resin layer to protect the colored opaque resin layer.

1 and 2 show an example of a decorative board of the present invention, and reference numeral 1 in the figures represents a substrate. The substrate 1 may be made of wood such as lauan plywood, particle boat, lumber core board, solid wood, or resin such as fiber-reinforced synthetic resin board, and its thickness is not particularly limited. No, but it is usually about 5 to 10 mm.

On this substrate 1, integrally provided is a colored opaque resin layer 4 in which a large number of small wood pieces 2 are dispersed in a colored opaque resin 3.
The small pieces of wood 2 forming this resin layer 4 include black tongue, beech, oak, horse chestnut, Japanese horse chestnut, ash, maple,
Broad-leaved trees such as birch and oak, cedar, cypress, pine,
A small piece of wood such as a coniferous tree such as spruce or agathis, the shape of which is not particularly limited,
Various shapes are used, such as small pieces formed by cutting such as a plate shape, a rectangular parallelepiped shape, a cube shape, and a granular shape, or small pieces obtained by crushing these small pieces by mechanical impact or roller pressure. The size of this small piece 2 is, if its shape is a rectangular parallelepiped, the width is 3
~7 mm, preferably 5-6 mm, length 3-20 mm, preferably 12-20 mm, thickness 0.2-3 mm, preferably
From 0.2-1 mm to 20-25 mm in width, 20-100 mm in length, preferably 30-60 mm, and 0.2-3 mm in thickness, preferably 0.2
A flat piece up to 1 mm in diameter is preferable; a cylindrical piece has a diameter of 5 to 100 mm and a thickness of about 0.2 to 5 mm; a crushed piece has a width of 1 to 4 mm and a length of 3 to 30 mm, preferably 5 to 30 mm. , thickness 0.2~3mm, preferably 0.2~3mm
Approximately 1 mm is desirable. Moreover, this small piece of wood 2 is
Trees of different species or colors may be mixed. Furthermore, the small pieces of wood 2 may be subjected to dimensional stabilization treatment if necessary. Dimensional stabilization treatments include acetylation treatment in which small pieces of wood are treated with acetic anhydride, impregnation with polyethylene glycol or polypropylene glycol, liquid phenolic resin, unsaturated polyester resin, epoxy resin, silicone resin, urethane resin, acrylic resin, etc. There is a method of impregnating and solidifying the same type of resin as the curable resin liquid mentioned above. Alternatively, the dimensional stabilization treatment and the preservative treatment can be performed simultaneously by mixing an organic halogen preservative into the polyethylene glycol or liquid resin.

Further, the small piece of wood 2 may be partially or entirely colored in one or more colors, such as black, such as black dun,
It is also preferable to make use of the natural colors of wood, such as yellow for brick and paddocks, and white for oak and beech. For the coloring treatment, a method is used in which a large number of wood pieces are immersed in a coloring solution in which a coloring agent such as a dye or pigment is dissolved in a solvent such as water or an organic solvent, and the concentration of the coloring agent is approximately 0.1 to 10% by weight. It is also possible to heat the coloring liquid to promote penetration of the coloring liquid, thereby producing a deep color. Further, during the dimensional stabilization treatment, a coloring agent can be dissolved in various liquid resins, and the coloring treatment can be performed simultaneously with the dimensional stabilization treatment.

In addition, the resins forming the colored opaque resin 3 mainly include thermosetting resins that are in a liquid state before curing, such as unsaturated polyester resins, polyurethane resins, diallyl phthalate resins, epoxy resins, silicone resins, phenolic resins, and acrylic resins. Fillers and colorants are added to this to create colored opaque resin 3.
is formed. Calcium carbonate, talc, titanium oxide, silica, glass powder, etc. are used as fillers here. The amount of filler is based on the resin liquid.
It is approximately 100 to 400 parts by weight per 100 parts by weight.
Further, the coloring agent is preferably a dye, a pigment, or the like having a yellow, brown, or tan color similar to the color of the wood piece 2, but other colors may be used. The amount added may be within a normal range and is not particularly limited.

Moreover, in the case of this wood particle dispersion colored opaque resin layer 4, most of the wood particles 2... are dispersed on the surface side, as shown in FIG. One surface is exposed to the surface of layer 4, and the surface of layer 4 is flat. The total exposed area of the small pieces of wood 2 occupying the surface area of the layer 4 is about 10 to 90%, preferably about 70 to 90%. Further, the thickness of this resin layer 4 is about 1 to 2 mm, preferably about 1 to 1.5 mm.

On this dispersed colored opaque resin layer 4 of small pieces of wood,
A transparent resin layer 5 is integrally provided. This transparent resin layer 5 is colorless transparent or colored transparent and has a thickness of 10 to
The resin layer is approximately 300 μm thick and is made of a thermosetting resin such as an unsaturated polyester resin, polyurethane resin, diallyl phthalate resin, or epoxy resin. Preferably, the same type of resin as the colored opaque resin 3 is used. .

In the case of a decorative board having such a structure, the small wood pieces 2...
Since the side surfaces of the wood pieces are exposed and these exposed sides are parallel to the surface of the decorative board, the wood grain pattern of the small wood pieces 2 appears to the maximum on the surface of the decorative board, improving the effect of adding small wood pieces and adding a small amount of wood. The maximum beauty can be obtained by mixing in the amount of .

Next, a method for manufacturing this decorative board will be explained.

First, an uncured paste resin composition that will become the colored opaque resin 3 is prepared. After mixing and kneading small pieces of wood with this resin composition, this mixture is formed into a flat plate shape, and heated and pressed using a hot press or the like to form a solidified product. Next, the surface of this solidified product is ground by sanding or the like to expose the small pieces of wood on the surface, thereby forming a colored opaque resin layer 4 containing dispersed pieces of wood. Next, a colorless transparent or colored transparent paint such as unsaturated polyester resin is applied to the surface of this to form a transparent resin layer 5, and this is adhered to the substrate 1 to form a decorative board.

In addition, a mold with a flat mold surface is prepared, a transparent paint that will become the transparent resin layer 5 is applied to the mold surface, and small pieces of wood 2 are sprinkled on top of the paint while the paint is still wet. Align the side of the small piece of wood 2 with the coating surface. Next, a resin composition that will become the colored opaque resin 3 is poured over the resin composition until at least the small piece of wood 2 is covered, and similarly heated and pressurized to solidify. Then, by bonding the substrate 1 to the product released from the mold, the intended decorative board can be obtained.

〔Example〕

A paste composition was prepared by blending 100 parts by weight of an uncured unsaturated polyester resin with 300 parts by weight of calcium carbonate and 1 part by weight of a yellow pigment.

On the other hand, beech, oak, etc. are 10~20mm wide and 10~20mm long.
Cut into small pieces of 20 mm and 1 to 1.5 mm thick.
After drying this, small pieces of wood were soaked in an uncured unsaturated polyester resin liquid, impregnated with the resin liquid, and left to stand at room temperature to a semi-hardened state.The above composition was mixed with a small piece of wood, which was then poured into a mold and pressed with a roller. Flattened to a thickness of 1.5
It was molded into a flat plate of mm. Next, let this cool at room temperature for 3
After leaving it for a while, pressurize it with a hot press.
The mixture was heated and pressurized at 1 MPa and 100° C. for 5 minutes to form a solidified product. Grind this thing with a sander,
Small pieces of wood were exposed on the surface. Next, an unsaturated polyester resin paint was applied to the surface of this to form a coating film with a thickness of about 100 μm, and this was bonded to a substrate of lauan plywood with a thickness of 2 mm to obtain a decorative board.

The obtained decorative board had a beautiful appearance with the grain pattern of the small pieces of wood appearing on the surface.

〔Effect of the invention〕

As explained above, the decorative board of the present invention includes a substrate, a colored opaque resin layer provided on the substrate and having a large number of wood pieces dispersed therein, and a transparent resin layer provided on the colored opaque resin layer. The wood particles in the colored opaque resin layer are exposed on the surface of this layer, and the exposed ratio is increased to 10 to 90% of the surface area.
%, and since this layer is flattened, the exposed side surfaces of the wood pieces in the dispersed colored opaque resin layer are arranged and arranged parallel to the decorative board surface, and the wood grain of the wood pieces is The pattern appears effectively on the surface of the decorative board without wasting it, resulting in a beautiful decorative board with an emphasized wood grain pattern. Furthermore, the contrast between the wood grain pattern of the small piece of wood and the color tone of the colored opaque resin layer provides variety and unexpectedness in the surface pattern.

[Brief explanation of drawings]

FIG. 1 and FIG. 2 both show an example of the decorative board of the present invention, and FIG. 1 is a schematic cross-sectional view;
FIG. 2 is a plan view. DESCRIPTION OF SYMBOLS 1... Substrate, 2... Small pieces of wood, 4... Colored opaque resin layer with dispersed pieces of wood, 4... Transparent resin layer.

Claims (1)

[Claims] 1 comprising a substrate, a colored opaque resin layer provided on the substrate and having a large number of wood pieces dispersed therein, and a transparent resin layer provided on the colored opaque resin layer, in which the wood in the colored opaque resin layer is Small pieces are exposed on the surface of this layer and their exposed ratio is 10% of the surface area.
~90%, and the surface is flat.