JPS6240162B2 - - Google Patents

Description

Detailed Description of the Invention The present invention is a synthetic resin-impregnated wooden veneer decorative board that can uniformly impregnate synthetic resin without impairing the wood feel and eliminate so-called uneven impregnation of synthetic resin. It is related to the manufacturing method.

Conventionally, in order to obtain this type of synthetic resin-impregnated wood veneer decorative board, the wood veneer obtained by cutting raw wood is first immersed in a high-temperature degreasing solution to remove the wood veneer contained inside. After dissolving and extracting the various resins contained in the wood veneer, the wood veneer was immersed in a synthetic resin solution to impregnate the interior of the wood veneer with the synthetic resin, and then placed on plywood and heat-pressed.

However, in the above-mentioned conventional manufacturing method, the resin contained in the wood veneer is sufficiently removed, making it easier to fully impregnate the wood veneer with synthetic resin, but on the other hand, the high temperature of the degreasing solution It had the disadvantage that a burning phenomenon occurred on itself, resulting in a dark-colored decorative board. Note that the degreasing solution must be boiled at a high temperature or in a state close to it in order to sufficiently remove the resin contained inside the wood veneer.As a result, when impregnating the wood veneer with synthetic resin, This tends to cause so-called uneven impregnation.

The present invention is an epoch-making and new technology that has been developed for the purpose of solving at once the phenomenon of burning of wooden veneers or the phenomenon of uneven impregnation of synthetic resin in the conventional manufacturing method.

The present invention will be explained in detail below.

In the present invention, a fritchi is created by sawing conifer logs such as Japanese pine wood or Japanese oak wood into a square lumber shape, and then the fritchi is cut into slices to make a wood veneer with a thickness of 0.2 mm to 1.0 mm.

Next, the wood veneer is immersed in a surfactant solution with a concentration of 2% to 3% wt, which is a degreasing solution, and the surfactant solution is boiled to perform a degreasing treatment for 4 to 8 hours. The various resins contained inside the veneer are removed by elution and extraction. At this time, because the degreasing solution was at a high temperature, the wood veneer turned dark black. Next, the degreased wood veneer is treated with a hydrogen peroxide solution, hypochlorous acid aqueous solution, etc. at a wt concentration of 2% to 3% to an initial pH of 9 to 3%.
10 (preferably 9.3 to 9.4) and 40℃ to 60℃
It is immersed in a bleaching solution heated to 0.degree. C. and bleached for 1 to 3 hours. At this time, the wood veneer, which turned dark black during the degreasing process, almost returns to its original color.
Next, the wood veneer is immersed in a solution of a thermosetting synthetic resin such as polyester resin or polyacrylic resin, so that the inside of the wood veneer is sufficiently impregnated with the synthetic resin. At this time, since there are almost no various resins inside the wood veneer, the synthetic resin is impregnated almost uniformly. Next, the wooden veneer impregnated with the synthetic resin is made into plywood,
The wood veneer is placed on a substrate such as chipboard or particle board and heat-pressed using a heat press to harden the synthetic resin impregnated into the wood veneer, and the wood veneer is adhered to the substrate. At this time, an adhesive may be interposed between the wooden veneer and the substrate if necessary.

The manufacturing method of the synthetic resin-impregnated wooden veneer decorative board of the present invention is configured as described above, and according to the manufacturing method of the present invention, the resin content of the wooden veneer in the high-temperature degreasing solution is approximately The burning phenomenon of the wood veneer that occurs during the removal and subsequent degreasing treatment is eliminated by immersing the wood veneer in the bleaching solution, and the wood grain also stands out clearly. By immersing the wood veneer that has undergone this treatment process in a synthetic resin solution and placing it under reduced pressure or pressure, the synthetic resin will be fully absorbed inside the wood veneer after the resin has been removed. It has the effect of impregnating the wood almost uniformly without damaging the wood texture.

Bleaching without degreasing has the effect of making the wood grain stand out, but on the other hand, the resin content of the wood veneer will dissolve into the bleaching solution.
This is undesirable because it makes it difficult to control the concentration of the bleaching solution and increases processing costs.

In addition, it has been proposed to add a surfactant to the degreasing solution and perform the bleaching treatment at the same time, but in this case, both the degreasing treatment and the bleaching treatment are not carried out sufficiently, resulting in the degreasing of the synthetic resin. It is difficult to do this without causing uneven impregnation.

The decorative board obtained by the present invention is suitable for use as a board for construction such as floor materials and wall materials.

Claims (1)

[Claims] 1 After degreasing the wood veneer in a high-temperature surfactant solution, bleaching it in a bleaching solution with a pH of 9 to 10, and then impregnating it with a synthetic resin to create a synthetic resin-impregnated wood veneer. A method for producing a synthetic resin-impregnated wood veneer decorative board, which is characterized by thermocompression bonding.