JPH0661894B2 - Manufacturing method of building board - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for producing a building board in which a decorative laminated veneer or a wooden decorative veneer is attached to the surface of a gypsum board.

[Background Art] A building board formed by pasting a single plate such as natural cedar on the surface of a gypsum board has been conventionally used as an interior material as a semi-incombustible material. When a natural veneer is directly attached to, the components eluted from the gypsum board and the components eluted from the veneer, especially the tannins, react to discolor the surface of the wooden veneer, and The quality was deteriorated.

[Object of the Invention] The present invention has been made in view of the above points, and when a wood veneer is attached to the surface of a gypsum board to produce a quasi-incombustible material whose surface is decorated, the surface is discolored. It is an object of the present invention to provide a method for manufacturing a building board without a problem.

DISCLOSURE OF THE INVENTION That is, in the method for manufacturing a building board of the present invention, a wood slice veneer thinner than the gypsum board 2 is treated with an alkaline solution, and the veneer 1 is attached to the surface of the gypsum board 2. The above object is achieved by subjecting the veneer 1 to alkali treatment in advance to remove discolored components such as tannins of the veneer 1 and the like.

The present invention will be described in detail below. As shown in Fig. 1 (a), a raw wood 3 is placed in a basket with a spacer sandwiched between a plurality of natural veneers 4 that have been rotary-laced to a thickness of 0.3 to 1.2 mm, and then the basket is made of alkali. Dip in water for alkali treatment. As the alkaline water, one obtained by dissolving sodium carbonate or the like in water can be used, and the pH is 9 to 10.
5, the temperature is 95 ± 3 ° C., and the treatment can be performed for about 1 to 2 hours. Next, the basket is immersed in a decolorizing solution to decolor the veneer. The pH of the decolorizing solution can be 9 to 10, the temperature is 60 to 70 ° C., and the time can be about 1 to 3 hours. Then, the veneer is washed in hot water of 95 ± 3 ° C. for 30 to 60 minutes, and then dyed. Here, it is preferable to dye at 95 ± 3 ° C. for 1 to 3 hours. Next, the dyed veneer is conditioned to a water content of 15 to 35%, and then the conditioned veneer is laminated with a summer material and a urethane adhesive to obtain a composite material. , As shown in FIG. 1 (b), the composite material 5 is provided with a concavo-convex mold 6
To fabricate a flitch 7, and slice the flitch 7 as shown in FIG. 1 (c) to laminate the artificial makeup 1
To get After that, as shown in FIG. 2, the artificial decorative laminated veneer 1 is bonded to the surface of the gypsum board 2 with an adhesive to obtain a building board A.

Thus, in the artificial makeup laminated veneer 1 on the surface of the building plate A thus obtained, since the natural veneer 4 is once treated with the alkaline liquid, the tannins of the natural veneer 4 are alkaline. After the artificial makeup laminated veneer 1 treated in this way is removed by reacting with the liquid, the veneer 1 is discolored by the alkaline component eluted from the gypsum board 2 after being attached to the surface of the gypsum board 2. There is nothing to do.

In the above, the artificial makeup laminated veneer 1 is attached to the surface of the gypsum board 2 to make the building board A. However, the wooden makeup veneer is attached to the surface of the gypsum board 2 to build the building board. A may be produced. That is, in that case, a humidity control single plate whose moisture content is 35% or less is directly attached to the surface of the gypsum board 2 with an adhesive to produce a building board A.

The present invention will be specifically described below based on examples.

Example 1 Agathis wood was rotary-laced to obtain a rotary veneer having a thickness of 1.0 mm, and the veneer was subjected to 1.0% of sodium carbonate.
It is dipped in the solution and treated with alkali. The alkaline treatment conditions were pH 9 to 10.5 and temperature 95 ± 3 ° C. for 1 hour.
Next, this veneer is dipped in 2% hydrogen peroxide solution adjusted to pH 9 to 10 and temperature 60 to 70 ° C. and treated for 2 hours,
Then, it is washed with hot water at 95 ± 3 ° C. for 30 minutes and then dyed.
The dyeing liquor is prepared by treating the dyeing liquor containing 1% of the dye at 95 ± 3 ° C. for 1 to 2 hours. Next, after the humidity is adjusted to a water content of 15 to 35%, the humidity-controlled single plate and the composite material are combined. As the composite material, a colored nonwoven fabric is used. A urethane adhesive is applied to the surface of the nonwoven fabric at a coating amount of 80 ± 10 g / m ² , and the above-mentioned veneer is laminated on the composite material and pressure is 10 kg / cm ^{2 for} 2 hours. This is done by pressing. Next, the flitch thus obtained was sliced at a thickness of 0.20 mm to obtain an artificial makeup laminated veneer.

On the other hand, the amount of masking agent applied to the surface of the 9 mm thick gypsum board was 40
The surface is treated by applying ~ 50 g / m ² and then 80-90 adhesive (struct bond) is applied to the surface of this gypsum board.
After applying at g / m ² , the artificial makeup laminated veneer was attached and pressed at a pressure of 5 kg / cm ² and a temperature of 105 ° C. for 60 seconds.
Then, the aqueous amino paint was applied on the surface at a coating amount of 2 g / scale ² to obtain a building board.

Example 2 A building board was obtained in the same manner as in Example 1 except that an ink layer was used instead of the composite material.

Example 3 A building board was obtained in the same manner as in Example 1 except that a colored sliced veneer having a thickness of 0.20 mm was used instead of the composite material.

Example 4 A building board was obtained in the same manner as in Example 1 except that an ultraviolet curable resin coating material was applied at a coating amount of 1 g / scale ² instead of the surface treatment of Example 1.

Example 5 Natural cedar having a thickness of 0.2 mm is dipped in a 1.0% solution of sodium carbonate for alkali treatment. Alkaline treatment conditions are
The pH was 9 to 10.5 and the temperature was 95 ± 3 ° C for 1 hour. Next, this veneer is immersed in 2% hydrogen peroxide solution adjusted to pH 9 to 10 and temperature 60 to 70 ° C. for 2 hours, and then rinsed with hot water at 95 ± 3 ° C. for 30 minutes, Then stain. The dyeing liquor is prepared by treating the dyeing liquor containing 1% of the dye at 95 ± 3 ° C. for 1 to 2 hours. Next, water content 1
The humidity was adjusted to 5 to 35% to obtain a wood decorative veneer.

On the other hand, the amount of masking agent applied to the surface of the 9 mm thick gypsum board was 40
Treating the surface by coating with to 50 g / m ^2, then this was applied to strike lacto bond in 80~90g / m ² on the surface of the gypsum board, the pressure 5Kg / c and stuck to the artificial decorative assemblage veneer
It was pressed at m ² and a temperature of 105 ° C. for 60 seconds. Then, the aqueous amino paint was applied on the surface at a coating amount of 2 g / scale ² to obtain a building board.

The decorative veneer on the surface of the building board obtained in each of the above examples did not discolor over a long period of time thereafter.

[Effects of the Invention] As described above, the present invention, the wood slice veneer that is thinner than the gypsum board is treated with an alkaline solution, and the veneer is attached to the surface of the gypsum board. It is possible to control the humidity by the hygroscopicity of laminated laminated veneer wood and decorative veneer wood, and it is possible to obtain a building board with a good appearance, and the veneer surface does not discolor due to the dissolved components of gypsum board. A semi-combustible material can be obtained.

[Brief description of drawings]

FIGS. 1 (a), (b) and (c) are perspective views showing a manufacturing process of an embodiment of the present invention, and FIG. 2 is a sectional view of the same construction board. 1 is a veneer board, 2 is a gypsum board, and A is a building board.

Claims (1)

[Claims] 1. A method for manufacturing a building board, wherein a wood slice veneer thinner than a gypsum board is treated with an alkaline solution and the veneer is attached to the surface of the gypsum board.