JPS606201B2 - Decorative veneer manufacturing method - Google Patents

Description

[Detailed description of the invention] This invention relates to a method for manufacturing decorative veneers.

In general, when manufacturing a lighter-colored A8 veneer using a dark-colored raw wood veneer (a veneer cut from dark-colored raw wood with a slicer or rotary laser), proceed as follows. I was going.

In other words, raw wood veneer is decolorized with hydrogen peroxide solution to create a decolorized veneer, which is soaked during dyeing and dyed to the desired color to create a dyed veneer. I-Q mad veneers were manufactured by stacking multiple sheets of wood (containing wood grain coloring agent), sandwiching them between a pair of molds and pressing them vertically to make flitches, and then slicing the flitches. However, when making decorative veneers from raw wood veneers with a dark ground color in this way, the hydrogen peroxide solution used to bleach the raw wood veneers remains in the bleached veneers. When dyeing a decolorized monoslope, there was a problem in that the dyeing solution was adversely affected by the elution of residual hydrogen peroxide. In addition, the obtained dyed veneer had problems in that its color turned yellow due to residual hydrogen peroxide and its light resistance deteriorated. Therefore, in order to remove the residual hydrogen peroxide, the following methods have been used so far. In other words, the bleached veneer is N
Post-treatment was carried out using S03, NaHSQ, etc., or the decolorized veneer was placed in a water tank lined with platinum steel for post-treatment. However, according to the former method, a large amount of sodium sulfate is generated during post-processing and remains in the veneer, and it is eluted into the beam liquor and stains the dye liquor, and during the drying process of the veneer, it may stain the surface of the veneer. It had the disadvantage of causing precipitation. Furthermore, according to the latter method, the hydrogen peroxide eluted from within the single slope is decomposed, and since the elution takes a long time, there is a drawback that the residual hydrogen peroxide cannot be rapidly decomposed. This invention was made in view of these circumstances, and involves decolorizing a material veneer using hydrogen peroxide to create a decolorized veneer, and then treating the decolorized veneer with metal ions that have a hydrogen peroxide decomposition effect. The gist of this method is to create a dyed veneer by dyeing using the beam solution containing the dye, and to produce a decorative veneer using this dyed veneer.

That is, this invention dyes the dyed veneer (in which hydrogen peroxide remains) with a beam solution containing metal ions that have a hydrogen peroxide decomposition effect, so that the residual hydrogen peroxide is rapidly decomposed at the same time as dyeing. This makes it possible to shorten the process by eliminating the need for the conventional post-treatment process after decolorization, and also eliminates unnecessary reaction products from post-treatment, unlike in conventional post-treatment using post-treatment agents. It is never generated.

Next, this invention will be explained in detail.

In this invention, a bleached veneer that has been bleached in a conventional manner using hydrogen peroxide is dyed using a beam solution containing metal ions that have a hydrogen peroxide decomposition effect.

The color of this beam is usually matched to the same color as the target spring wood of the natural wood veneer. Examples of metal ions having a hydrogen peroxide decomposition effect include metal ions such as copper ions, cobalt ions, nickel ions, and chromium ions.

Examples of dye solutions containing such metal ions include metal dye solutions containing metal ions such as copper ions, cobalt ions, nickel ions, and chromium ions. In addition, compounds containing metal ions such as copper ions, cobalt ions, nickel ions, chromium ions, etc. are dissolved in dye solutions other than metal anchor dyes, and the dye solutions contain those metal ions. can give. Also,
It is also possible to use a solution in which the concentration of metal ions is increased by dissolving a compound containing metal ions such as copper ions, cobalt ions, nickel ions, and chromium ions in the above metal complex dye solution. The dyed veneer that has been dyed in this way (has the same color as the target spring wood color of the natural precious wood veneer)
The residual hydrogen peroxide is decomposed and removed by the action of metal ions in the liquid.

The dyed veneer thus obtained is then made into a decorative veneer by a normal method. For example, an adhesive containing a coloring agent (usually the same color as the summer wood color of the target natural wood veneer) is applied to the veneer surface of decorative veneers, and multiple veneers are stacked and applied to the pressing surface. A frit is created by sandwiching and pressing between a pair of pattern plates with uneven surfaces, and a decorative veneer is made by slicing the frit. In addition, a coloring agent (dyed to the same color as the summer wood color of the target natural wood veneer) is applied to one side of the dyed veneer obtained as described above, and one side of the dyed veneer is colored with summer wood. A colored layer is formed, and a plurality of veneers with summer wood colored layers formed in this way are stacked with an adhesive so that the summer wood colored layers face in the same direction, and then pressed together. It is also used to make decorative veneers by flitching and slicing. In this case, the formation of the Natsumura color colored layer on the dyed veneer involves stacking two dyed veneers together, bringing the seams into close contact, and soaking them in the Natsumura color dyeing liquid in that state. Dye the outer surface of the veneer, then 1
A colored layer of summer wood color may be formed on one side of the dyed veneer by peeling the dyed veneer one by one. As described above, this invention creates a bleached veneer by bleaching a raw material veneer using hydrogen peroxide, and dyes this bleached veneer using a beam solution containing metal ions that have a hydrogen peroxide decomposition effect. In order to make dyed veneer and use this dyed veneer to manufacture decorative veneer,
Residual hydrogen peroxide can be rapidly decomposed at the same time as dyeing, and a special process for decomposing residual hydrogen peroxide is not required, making it possible to shorten the process. Furthermore, since no by-products are produced during the decomposition of residual hydrogen peroxide, there are no adverse effects caused by production by-products. Next, examples will be described.

Example 1 A plurality of cutina rotary veneers (thickness 1 side) were decolored under the following conditions.

(Bleaching) Decoloring agent: Hydrogen peroxide solution with a concentration of 3% pH: 10.5 Temperature: 60q○ Time: 3 to 4 hours Next, the bleached veneer thus obtained was dyed under the following conditions. At the same time as staining, residual hydrogen peroxide was decomposed.

(Dyeing) Dye: A295 (CI number)...5 parts by weight (hereinafter "parts")
): A291 (CI number)...2 parts Dye concentration: 0.01% (based on weight, the same below) Bath ratio: 4
0 Temperature: 95-10 P○ Time: 3 hours (Dye A291 contains cobalt ions)
Next, the dyed veneers obtained in this way are layered with an adhesive containing a coloring agent interposed therebetween, and this is pressed with a mold having unevenness on the pressing surface to create a flitch. A decorative veneer with a natural rose tone was obtained by slicing it into four thick pieces.

This decorative veneer showed no adverse effects due to residual hydrogen peroxide. Example 2 A plurality of veneers of the same material as used in Example 1 were bleached in the same manner as in Example 1 to produce bleached veneers.

Next, this bleached veneer was dyed to a spring wood color under the following conditions, and the residual hydrogen peroxide was decomposed. (Spring wood color dyeing) Dye: A295 (CI number)...1 part: A28
9 ( 〃 )...3 parts Dye concentration: 0.01% Yield ratio: 40 Temperature: 95-1000○ Time: 3-4 hours Hydrogen peroxide decomposer: Co(OH)2... Step 2 Next, the spring wood color-dyed veneers obtained in this way were made into pairs, and the seams were tightly sealed to prevent the dye from entering through them. Only the outer surfaces (surfaces) of a pair of spring wood color-dyed veneers were crushed and dyed in summer wood color under the following conditions to form a summer wood color dyed layer.

(Summer wood color dyeing) Dye: A289 (CI number)...Female part: A29
1 (〃)...1 part Dye concentration: 0.3% Yuki ratio: 30 Temperature: 80-9000 Time: 2 hours Next, a summer wood color dyed layer was formed on the surface in this way. A plurality of dyed veneers were stacked with an adhesive interposed so that the dyed layers of the summer wood color faced the same direction.

After this, the material was pressed and flitched in the same manner as in Example 1, and then sliced into 0.35 skin thick pieces to obtain a natural pine-like decorative veneer. No adverse effects of residual hydrogen peroxide were observed on this hull veneer either. Example 3 A plurality of veneers of the same material as used in Example 1 were bleached in the same manner as in Example 1 to produce bleached veneers.

Next, this bleached veneer was dyed in the same manner as in Example 2 to produce a spring wood colored veneer. For the thus obtained springwood color-dyed veneer, a coloring liquid having the following dye composition was applied to one side (front surface) of the veneer in the following manner to form a summerwood color colored layer. Dye: A289 (CI number)...
``1 Ikarito: A291 (〃)...2 parts Dye concentration: 2% Viscosity: Add thickener to make it 50 ps Coating amount: 9
Next, a plurality of veneers with summer wood colored layers formed on their surfaces in this manner were stacked with an adhesive interposed so that the summer wood colored layers faced in the same direction. .

Claims (1)

[Scope of Claims] 1 A bleached veneer is created by bleaching a material veneer using hydrogen peroxide, and this bleached veneer is dyed using a dye solution containing metal ions that have a hydrogen peroxide decomposition effect. A method for producing a decorative veneer, which is characterized in that a dyed veneer is produced using a dyed veneer, and a decorative veneer is produced using the dyed veneer. 2. Claim No. 2, wherein the dye liquor containing metal ions having a hydrogen peroxide decomposition action is a dye liquor containing at least one metal ion selected from the group consisting of copper ions, cobalt ions, nickel ions, and chromium ions. A method for producing a decorative veneer according to item 1.