JPH01314103A - Decorative sheet and its manufacture - Google Patents

Abstract

PURPOSE:To impart an uneven pattern expressing an external appearance which is equal to that of natural lumber, by a method wherein a deeply colored coating layer is formed on only a high-gravity protrusion which is formed on the surface of a ligneous plate material, and a trasparent coating layer is formed on the whole surface. CONSTITUTION:When compression processing of the surface of a ligneous plate material 1 is performed by making use of an embossing machine 2, a lower sphere of a compressed recessed part 3 attains high specific gravity/high density. When surface grinding is performed to this plate material 1 in the next process, a noncompression protrusion becomes a recessed part 5b on the contrary since the same is scraped off greatly and the compressed recessed part 3 becomes a protrusion 5a. Then a coloring coating 6 whose color is deeper than that of a recessed member is applied onto only the protrusion 5a. With this construction, the coating is not infiltrated into the plate material 1 and application of the clear coating free from oozing to the plate material is performed. Then a transparent coating 7 not concealing a material color of the recessed part 5b is applied to the whole surface of the plate material 1. Therefore, gloss of the transparent coating itself is expressed as it is in the protrusion 5a, the gloss of the coating itself is lost: therefore, this part becomes resemblant closely to natural lumber in the recessed part 5b.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a decorative board used for wall and ceiling materials in houses, furniture facing materials, etc., and a method for manufacturing the same, and particularly relates to a decorative board that has an uneven pattern formed on the surface. The present invention also relates to a decorative board whose convex portions are colored and painted, and a method for manufacturing the same.

<Prior Art> Various types of decorative boards of this type have been proposed in the past, and some examples are as follows.

(1) Decorative board made of plywood with convex portions shaped like tree rings and colored paraffin adhered to the convex portions (Utility Model Publication No. 29-579)
Publication No. 6).

(2) A primary colored synthetic resin paint is applied to the surface of the base material on which the uneven pattern is formed by embossing, and immediately after that, the paint adhering to the recesses is scraped off, and then the paint filled in the recesses is separated before it dries. By applying a secondary colored synthetic resin paint with a hue of A certain decorative board (Japanese Patent Publication No. 52-33161).

(3) After polishing the surface of a decorative board made of a softwood veneer adhered to plywood, etc. to form a concave-convex pattern with concave areas in the spring wood, the entire surface of the decorative board is colored darker than the color of the fall wood. After applying a coloring agent, and then scraping off the colorant adhering to the convex parts of the autumn material, a transparent thermosetting resin is applied to the entire surface so as to fill the concave parts of the spring material, and then dried or hot-press molded. The resulting coniferous decorative board has an uneven feel. Also, instead of using two types of paint, a colorant darker than the color of the autumn wood and a transparent thermosetting resin, a colored transparent thermosetting resin darker than the color of the autumn wood is used. After applying this to the entire surface of the decorative substrate on which the uneven pattern is formed, a coniferous decorative board (Japanese Patent Publication No. 61-138
Publication No. 72).

<Problems to be Solved by the Invention> However, these decorative laminates according to the prior art each have the following drawbacks or problems.

(1) By artificially forming an annual ring pattern by embossing and applying paraffin coloring to the protrusions, the paraffin's luster is used to express the so-called texture of the autumn wood of natural wood. The difference in gloss between the recesses to which no paraffin is attached becomes too noticeable, and the appearance is far removed from that of natural wood.

(2) Formation of an uneven pattern I: The secondary colored paint is applied to the convex parts of the base material surface, and the mixed paint of the primary colored paint and the secondary colored paint is applied to the concave parts, and due to the difference in coloring, the convex parts and The change with the concavity is expressed, but the texture of natural wood is not expressed at all.

(3) The concave parts of the spring wood are filled with a coloring agent or colored transparent thermosetting resin that is darker than the color of the autumn wood, so the concave parts of the spring wood are colored darker than the convex parts of the autumn wood, giving it a wood texture. However, in natural wood, the autumn wood, which has a high specific gravity and high density, has terry and exhibits a darker color than the spring wood. However, it was the opposite of natural wood, giving it an unnatural impression.

<Means for Solving the Problems> Therefore, an object of the present invention is to provide a decorative veneer having an uneven pattern exhibiting an appearance comparable to that of natural wood, and a method for manufacturing the same.

The object of the present invention is to form a colored coating layer that is darker than the color of the concave parts only on the convex parts of a wooden board material having a concave-convex pattern formed on its surface, in which high specific gravity parts are convex parts and low specific gravity parts are concave parts. This is achieved by a decorative board characterized in that a transparent coating layer that does not hide the color of the concave member is formed on the entire surface of the wooden board material.

The decorative board of the present invention forms an uneven pattern on the surface of a wood board material with low specific gravity areas as concave areas and high specific gravity areas as convex areas, and a colored paint darker than the color of the concave parts is applied only on the convex areas. It is manufactured by applying a transparent paint that does not hide the color of the recessed member over the entire surface of the wooden board and then drying it.

<Operation> A dark colored paint is applied onto the convex parts of the uneven pattern formed on the surface of the wood board material, and the color tone of the autumn wood part of natural wood is expressed.

Transparent paint is applied to the entire colored convex parts and concave parts where the color of the base material is expressed as is, but in the convex parts made of high specific gravity parts, the gloss of the transparent paint (terry in the autumn wood part) is exhibited as is. On the other hand, since the concave part consists of a low specific gravity part, a considerable amount penetrates and loses its luster, thereby expressing the color tone and texture of the spring wood part of natural wood.

Explanation of the structure and examples> The figure shows an example of the method for manufacturing a decorative board according to the present invention in the order of steps. First, in step (a), the surface of the wooden board l is heated or cooled using an embossing machine 2. Processed by pressing.

Here, the wood board l is a wood board such as plywood, sawn wood, fiberboard, particle board, etc.

Thus, as shown in Figure (b), the lower area (shaded area) of the squeezed concave portion 3 has a high specific gravity and high density, and the difference in specific gravity, density, and hardness from the convex portion that is not squeezed becomes noticeable. A plate material is obtained.

Then, in the next step (C), when the surface of this plate material is polished using a polishing machine 4 such as a wire roll brush or buff, or sandblasting, etc., the non-squeezed convex portions having low specific gravity and low density are largely scraped off. On the contrary, it becomes a concave portion 5b, and the pressed concave portion 3 is formed as a convex portion s5a because the amount of polishing is small, and a decorative board having a concavo-convex pattern formed on the surface as shown in Figure (d) is obtained.

A colored paint 6 having a darker color than the concave member color is applied only onto the convex portions 5a of this decorative board (FIG. (e)).

Since the convex portion 5a has a high specific gravity and high density, the paint applied thereon does not permeate into the board material l, and the paint is clearly applied without bleeding.

The colored paint 6 is a resin paint such as lacquer, enamel, acrylic resin, aminoalkyd resin, urethane resin, etc., and is applied or printed on the convex portions 5a using a roll coater, gravure or gravure offset printing machine, or the like.

Next, as shown in Figure (f), a transparent paint 7 that does not hide the material color of the recesses 5b is applied to the entire surface of the board l including the convex parts 5a coated with the colored paint 6. The transparent paint 7 is appropriately selected from resin paints such as acrylic resin, aminoalkyd resin, and urethane resin, and may be used as a colored transparent paint after being optionally colored.

Since the suction of paint at the convex portions 5a is very small, the gloss of the transparent paint 7 itself is expressed as is, and together with the color tone given by the colored paint 6, it becomes a material that closely resembles the autumn wood part of natural wood. . On the other hand, in the recess 5b, only the transparent paint 7 is applied, but since this part has a relatively low density and low specific gravity and is porous, a considerable amount of the applied transparent paint 7 is applied to the plate material 1 in the recess 5b. sucked inside. Therefore, the gloss of the paint itself is lost, and together with the color of the recessed parts, the paint closely resembles the spring wood of natural wood.

Examples of the present invention carried out by this method are as follows.

By inserting a lauan plywood 1 with a thickness of 12+ nm, a radius of 900 mm, and a length of 1800 mm into a hot press equipped with an embossed plate 2 with a wood grain pattern and heat-pressing it, the surface has low specific gravity convexities and high specific gravity. A primary uneven pattern consisting of concave portions 3 was formed, and then the material was put into a three-part cutting machine to obtain a floor base plate having a width of 300 mm and a length of 1800 mm.

The surface of this floor base plate is polished using polishing i4 with a wire brush, and the convex portions of low specific gravity in the primary uneven pattern are polished off and formed into concave portions 5b, while the concave portions of high specific gravity are not polished and become convex portions 5a. A remaining secondary uneven pattern was formed.

Next, a brown enamel is printed and applied only on the high-density convex portion 5a using a gravure offset printing machine, and then a transparent UV-curable unsaturated polyester resin colored brown is applied using a roll coater. After applying the resin to the entire surface of the board, the polyester resin is polymerized and cured using an ultraviolet irradiation device.

The decorative floorboards produced on the surface of the lauan plywood produced in this way had excellent design properties and had the same color tone and gloss as natural wood.

<Curing of the invention> According to the invention, the wood texture and texture (gloss) comparable to natural wood can be achieved.
A decorative board having this can be easily and inexpensively obtained.

[Brief explanation of the drawing]

The attached drawings (a) to (f) are schematic cross-sectional views illustrating each step of the method for manufacturing a decorative board according to the present invention. Explanation of symbols

Claims (3)

[Claims] (1) A colored coating layer with a color darker than the color of the concave parts is formed only on the convex parts of the wood board material, which has a convex-concave pattern formed on its surface with high specific gravity areas being convex parts and low specific gravity areas being concave parts. In addition, a decorative board characterized in that a transparent coating layer that does not hide the color of the concave member is formed on the entire surface of the wood board material. (2) Form a concavo-convex pattern on the surface of the wood board material with low specific gravity areas as concave areas and high specific gravity areas as convex areas, apply a colored paint darker than the color of the concave parts only on the convex areas, and then A method for manufacturing a decorative board, which comprises the steps of applying a transparent paint that does not hide the color of the concave parts to the entire surface of a wooden board, and then drying the paint. (3) The surface of the wood board is pressed to form a primary uneven pattern consisting of high specific gravity recesses and low specific gravity convex parts, and the surface of the wood board is polished to remove the high specific gravity recesses in the primary uneven pattern. 3. The makeup according to claim 2, wherein a secondary uneven pattern is formed in which low specific gravity convex portions become convex portions and concave portions, and the colored paint is applied only on the convex portions in the secondary uneven pattern. Method of manufacturing boards.