JPH07102666B2 - Decorative board and manufacturing method thereof - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a coated decorative board made of wood fibers and a method for producing the same.

[Prior art and its problems]

The following proposals have been made for a decorative board coated with wood fibers.

B. As shown in Japanese Examined Patent Publication No. 40-14990, an uneven pattern is formed on the surface, a transparent paint is applied over this pattern surface, the pigment in the paint is allowed to settle in the concave part of the pattern, and the convex part of the pattern is A transparent layer that can be formed.

In this proposal, the convex part of the pattern expresses the other color of the article through the transparent layer, and the concave part is colored by the pigment in the paint settling, but the color is monochromatic and the design is monotonous. There are difficulties.

(B) As this type of coated board, a sealer coating layer is layered on the convex outer surface of a substrate made of wood fiber, and an opaque coating film is layered on the surface and the concave outer surface to obtain a uniform color tone A coating board having an uneven pattern formed by layering the film thickness of the semitransparent coating layer on the surface of the film layer on the concave surface to be thicker than that on the convex surface is also proposed.

This proposal forms a sealer coating layer on a convex outer surface having a low specific gravity, prevents the absorption of the colored coating material applied to the surface, and thus provides a uniform colored coating layer regardless of the surface density of the uneven outer surface. By applying the semi-transparent coating layer after forming, the semi-transparent coating layer is layered so that the convex outer surface portion is thin and the concave outer surface portion is thick. Therefore, on the concave surface, the color tone of the opaque coating layer is emphasized by passing through a thin semitransparent coating layer, and on the concave surface, the color tone of the opaque coating layer is almost hidden by the semitransparent coating layer. The color tone is emphasized.

Further, even in the intermediate portion from the convex surface to the concave surface, the translucent coating film layer is configured to be thicker according to the depth of the concave portion, so that the change in color tone between the convex surface and the concave surface is the same. There is no fault due to the difference in shade, which causes a natural color change.

However, although improved in terms of design, the production line must be complicated because two layers, a colored coating layer and a semi-transparent layer, must be formed, and the difference in shade of the same paint makes it difficult to change the color tone. Is left.

(Means for Solving Problems and Their Actions) The present invention has the following configuration in order to solve the above problems. That is, when applying a decorative board made of wood fibers, a coating is applied to prevent inhalation of the paint, and then a large particle high specific gravity pigment 4a with a large specific gravity and large particles on the entire surface of this table, and a color tone different from that of the pigment 4a. And the pigment 4a, which has a smaller specific gravity and smaller particles and a small particle low specific gravity pigment 4b, is applied and left to stand, and the large particle high specific gravity pigment 4a Is settled, and the small colored low specific gravity pigment 4b forms a layer on the top of the convex colored coating film layer A.
The small particle low specific gravity pigment 4b penetrates into the base material 1 together with a part of the coating material on the non-suction prevention treated portion which is not subjected to the suction prevention processing, and the large particle high specific gravity pigment 4a forms a layer on the surface thereof. The concave colored coating layers B are formed respectively.

According to the present invention, by adopting the above-mentioned constitution, the colored coating layers A and B having different colors can be obtained in a single coating step in the coating suction-prevention treatment section and the non-suction-prevention treatment section. . That is, a coating layer having a high design property can be obtained by a simple process.

Examples of the present invention will be described below.

(Description of Embodiments) FIGS. 1 to 3 show a first embodiment of the present invention.

1 to 3, the base material 1 is a fiber board produced by compression molding wood fibers obtained by a usual method.

First, as shown in FIG. 1, a sealer is applied in a pattern on the surface of the base material 1 by using a coating device as a coating suction preventing treatment to form a sealer coating layer 2.

Next, as shown in FIG. 2, a large particle high specific gravity pigment having a high specific gravity and large particles on the entire surface of which a sealer coating is applied in a pattern.
4a and a pigment 4a having a different color tone from the pigment 4a and having a specific gravity lower than that of the pigment 4a and small particles 4b are arbitrarily mixed, and a substantially uniform coating is applied using a coating device.

Then, if left for a while, the colored coating material 4 has a sealer layer formed on the sealer coating film layer portion 2, so that the colored coating material 4 is not sucked into the base material 1 and is convex as shown in FIG. Form layer A.

The convex colored coating layer A is a large-particle high-density pigment 4a in the colored coating material 4.
And the small particle low specific gravity pigment 4b are mixed, the large particle high specific gravity pigment 4a is settled, and conversely, the small particle low specific gravity pigment 4b is configured to form a layer on the upper part thereof.

Therefore, the convex colored coating film layer A on the sealer coating film layer portion 2 has a thick coating film and the small particle low specific gravity pigment 4b is expressed in a deep color tone.

By changing the addition amount of the small particle low specific gravity pigment 4b, for example, by decreasing it, the color tone of the upper layer containing the pigment 4b is transmitted, and the large particle high specific gravity that settles at the bottom of the convex colored coating layer A. The color tone of the pigment 4a is influenced and appears, and a subtle color change is obtained.

Since the sealant coating film is not formed on the non-sealer portion 3 of the colored coating material 4, a part thereof is sucked into the base material 1 to form the concave colored coating film layer B.

The concave colored coating layer B is a large particle high specific gravity pigment 4a in the colored paint 4.
And the small particle low specific gravity pigment 4b are mixed with each other, so that the paint 4 is attracted to the flow accompanied with the suction into the base material 1,
The small particle low specific gravity pigment 4b is sucked into the base material 1 together with the coating material 4, and the large particle high specific gravity pigment 4a is left in the non-sealer portion 3 to form a layer.

Therefore, the coating film thickness of the concave colored coating film layer B on the non-sealer portion 3 becomes slightly thin, and the color tone of the large particle high specific gravity pigment 4a is expressed in a dark color.

By changing the addition amount of the small particle low specific gravity pigment 4b or the large particle high specific gravity pigment 4a, the proportion of the small particle low specific gravity pigment 4b remaining in the concave colored coating layer B on the non-sealer portion 3 is changed, The color tones of the pigments 4a and 4b influence and appear, and a subtle color change is obtained. This color change can also be obtained by changing the addition amount of the large particle high specific gravity pigment 4a. If necessary, top coating may be applied to the entire front surface of the substrate 1 on which the convex colored coating layer A and the concave colored coating layer B are formed.

If the colors of the large particle high specific gravity pigment 4a and the small particle low specific gravity pigment 4b are changed, the colors of the sealer coating layer portion 2 and the non-sealer portion 3 can be changed, which is useful for improving the design.

In the above examples, the application of a sealer was described as an example of the paint suction prevention treatment, but in addition to this, sealing, resin impregnation, paint, etc. may be used to perform paint suction prevention treatment. it can.

In the present invention, the portion that has been subjected to the suction prevention processing and the portion that has not been sucked are referred to as the "paint suction prevention processing section" and the "non-suction prevention processing section", respectively.

〔Example〕

A medium fiberboard having an average specific gravity of 0.66 was used as a substrate, and a sealer was coated on the surface in a pattern by a roll coater.

Next, titanium oxide (average particle size 0.16μ, specific gravity 3.8) and carbon black (average particle size 0.01, specific gravity 1.
A colored coating prepared by mixing 8) in a weight ratio of 1: 1 at a ratio of 10% by weight, 15% by weight of an aqueous alkaline resin and 75% by weight of water was applied to the entire surface by a flow coater and left to stand. However, the portion where the sealer coating film is formed on the substrate surface is black because carbon black forms a layer on the surface side, and the portion where the sealer coating layer is not formed has titanium oxide on the surface side. Since it was formed, it was grayish white, and a coated surface having the black portion and the grayish white portion was obtained in synchronism with the pattern formed by the sealer coating film.

〔The invention's effect〕

The specific gravity of the large particle high specific gravity pigment 4a is low, and the color of the convex pattern portion and concave pattern portion of the surface unevenness pattern due to the difference in sucking the coating material into the base material using the coloring coating material mixed with the small particle low specific gravity pigment 4b Changes can be made, and such color changes can be made with a single color coating. Further, the color change can be easily made subtly by changing the addition amount of each pigment.

[Brief description of drawings]

FIG. 1 is a plan view showing a state where a patterned sealer is applied in the method of the present invention. FIG. 2: Side view showing the state immediately after the coating of the coating material. FIG. 3: Side view showing the final state of the paint. 1: Base material, 2: Sealer coating layer part, 3: Non-sealer part, 4: Paint, 4a: Large particle high specific gravity pigment, 4b: Small particle low specific gravity pigment, A: Convex colored coating film layer, B: Recessed colored coating layer.

Claims (3)

[Claims] 1. A surface of a base material 1 made of wood fiber is subjected to a paint-sucking prevention treatment in a pattern, and a large-particle high-density pigment 4a having a large specific gravity and large particles is provided in the paint suction-preventing treatment part. The pigment 4a that has settled and has a different color tone from the pigment 4a
Smaller particles having a smaller specific gravity and smaller particles A convex colored coating layer A having a layer of a low specific gravity pigment 4b is formed on the upper part thereof, while small particles are formed on the other non-sucking-prevented treated parts which have not been sucked. The concave colored coating layer B in which the low-particle-density pigment 4b is infiltrated into the substrate 1 and the large-particle high-density pigment 4a forms a layer on the upper surface thereof.
A decorative plate characterized by being formed. 2. A large particle high specific gravity pigment 4a having a large specific gravity and large particles, which is obtained by subjecting a surface of a base material 1 made of wood fiber to a pattern-like treatment for preventing the absorption of a paint, and then having a large specific gravity and large particles. The pigment 4a having a different color tone and a smaller specific gravity and smaller particles than the pigment 4a is mixed with the small particle low specific gravity pigment 4b and left to stand. The small particle low specific gravity pigment 4b that has settled down forms a convex colored coating film layer A having a layer formed on the upper portion thereof, while the small particle low specific gravity pigment 4a is formed on the other non-sucking-prevented treated portion which has not been sucked. 4b penetrates into the substrate 1, and a concave colored coating layer B having a large particle high specific gravity pigment 4a as a layer is formed on the surface thereof. 3. A large-particle high-density pigment having a large specific gravity and large particles on the entire surface of the base material 1 made of wood fiber by coating a sealer in a pattern to form a sealer coating layer portion 2.
4a and a pigment 4a having a color tone different from that of the pigment 4a and having a smaller specific gravity and smaller particles than the pigment 4a, a small-particle low-specific-gravity pigment 4b is optionally mixed and applied, and the mixture is allowed to stand, and then the sealer coating film layer portion 2 is applied. The large particle high specific gravity pigment 4a settles, and the small particle low specific gravity pigment 4b forms a convex colored coating film layer A having a layer on the top thereof, while the sealer coating film layer is not formed on the non-sealer portion 3 In addition, a small particle low specific gravity pigment 4b penetrates into the substrate 1, and a large colored particle high specific gravity pigment 4a forms a layered concave colored coating layer B on the surface thereof. Method.