JPS5833406A - Method of dyeing wood veneer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] This invention relates to a method for dyeing wood veneers.

Until now, wood veneers, which are the raw materials for laminated decorative veneers, etc., have been dyed by immersing the wood veneers in a dyeing solution as they are, or after 17 days of decolorization. However, when wood veneers are dyed in this manner, dyeing efficiency is poor due to the low dyeing rate (dying efficiency) of the dye to the wood (approximately 20%), which results in a large loss of dye.

Therefore, the inventors conducted a series of studies in an attempt to somehow increase the dye retention rate, and found that when wood veneer was dyed with hydrogen peroxide, the dye retention rate was significantly improved. They discovered that dye loss could be reduced and arrived at this invention.

That is, the gist of the present invention is to make the wood veneer contain hydrogen peroxide when dyeing the wood veneer with a dyeing solution.

In this way, when hydrogen peroxide is added to a wood veneer, the wood fibers of the wood veneer are significantly activated by the action of hydrogen peroxide, increasing the number of dyeing points, thereby improving the dyeing rate. Conceivable.

The usual methods for adding hydrogen peroxide to wood veneers include applying hydrogen peroxide to the wood veneer or immersing the wood veneer in hydrogen peroxide. It is not limited.

When applying hydrogen peroxide solution to a wood veneer, as shown in FIG. When water is applied linearly, the applied hydrogen peroxide solution 2 penetrates into the interior of the wood veneer 1, as shown in FIG. When such a wood veneer 1 is dyed using a dyeing solution, the wood fibers in the area where hydrogen peroxide has been applied are activated and the number of dyeing points increases.
dyed deeply. Therefore, natural color unevenness occurs in the dyed wood veneer 1, resulting in dark and light colored areas, making it ideal as a dyed veneer for expressing shade. In other words, the laminated decorative veneer using this dyed veneer expresses the natural heathered appearance. It becomes like this.

The content of hydrogen peroxide is preferably set so that hydrogen peroxide is 1 to 5% by weight (hereinafter abbreviated as "chi") based on the bone-dry IT (wood substance) of the wood veneer. This is because if it is less than 1%, the effect of improving the dyeing rate is insufficient, and if it exceeds 5%, the dye tends to discolor during dyeing.

Dyeing is usually carried out by dipping a wood veneer containing hydrogen peroxide in a dyeing solution, but is not limited to this.The dye used in the dyeing solution is an azo dye-based dye. It is preferable to use one from the viewpoint of effectiveness.

As described above, the present invention allows the wood veneer to contain hydrogen peroxide when dyeing the wood veneer with a dyeing solution.
Due to the action of hydrogen peroxide, the dye dyeing rate is improved. Therefore, it becomes possible to reduce the amount of dye loss, and it becomes possible to dye molds with dyes that have fewer wrinkles. Also,
When hydrogen peroxide is added by applying a hydrogen peroxide solution to the surface of the wood veneer in a linear manner, the wood veneer will have natural color unevenness due to dyeing. In the past, by using this dyed veneer, it was possible to easily create a laminated decorative veneer that faithfully expressed the shaded heat characteristic of natural zelkova (traditionally, this was done by adding unevenness to the surface of the veneer). However, it will now be possible to create something that was previously lacking in a natural feel.

Next, examples will be explained together with comparative examples.

[Example 1] When a rotary veneer made of IUS wood with a thickness of 1.0 liters was immersed in 10 liters of hydrogen peroxide for 30 minutes, it was pulled out and the hydrogen peroxide in the veneer was measured. 1, which contained 1.5% of hydrogen peroxide, and 0.2% of the azo dye A-289 (A is C1, the same applies hereinafter).
% solution and dyed for 3 hours at 95 ± 2 ° C. After immersing in hydrogen peroxide solution, once treated with hot water (95 ° C. x 30 minutes) to drive out the hydrogen peroxide (hydrogen peroxide-containing lid: 0.001%) It was dyed much darker than similar dyed products.

[Execution example 2] A rotary veneer made of agathis material with a thickness of 08 cm was immersed in two strips of hydrogen peroxide solution for 1 hour, and then pulled up.

In this case, the amount of hydrogen peroxide in the veneer is 1.
It contained 2%. This veneer is dyed with Anne° dye A-29.
When dyeing was carried out at 95±2°C for 3 hours by immersing it in a 5.05 solution, the hydrogen peroxide solution was removed. O1
5) The color was much darker than that of similarly dyed products.

[Example 3] A rotary veneer made of Lapla wood with a thickness of 1.0 mm was immersed in 5% hydrogen peroxide solution for 1 hour and then drained.

In this case, the hydrogen peroxide in the veneer is 3.
It contained 1. This veneer is dyed with azo dye A-293.
After immersing in α3-chip for 2 hours at 95±2°C, immersing in hydrogen peroxide solution and treating with boiling water to drive out the hydrogen peroxide (hydrogen peroxide-containing t: 0.o12-chi). ) The color was much darker than that of similar dyes.

[Example 4] Thickness of agathis material 0.6 10 on the surface of rotary veneer
% hydrogen peroxide solution in a linear manner and leave it for about 1 hour, then immerse it in a 0.1% solution of azo dye A-289.
After staining at ±2°C for 2 hours and 30 minutes, natural color unevenness was observed. Using a commercially available one-component urethane adhesive, this was laminated and pressed in a mold with uneven surfaces to form 7 pieces of wood.The 7 pieces were then sliced, resulting in a wood grain pattern similar to that of natural zelkova. A laminated decorative veneer was obtained. [Example 5] Thickness of the Aius wood was 0.6 ■ 35 on the surface of the rotary veneer.
After applying hydrogen peroxide solution in a linear manner and leaving it for about 2 hours, it was immersed in 0.2 g of azo dye A-295.
When dyed for 3 hours at 5±2°C, natural color unevenness was observed. Using a commercially available one-component urethane adhesive, this was laminated and pressed in a mold with uneven surfaces to form 7 pieces of wood.The 7 pieces were then sliced, resulting in a laminated wood with a wood grain pattern similar to the shaded heather of natural zelkova. A decorative veneer was obtained.

[Brief explanation of drawings]

FIGS. 1 and 2 are diagrams showing the state of application of hydrogen peroxide solution. l...wood veneer 1λ...veneer 1ki2...coated hydrogen peroxide solution Patent applicant Matsushita Electric Works Co., Ltd. agent Patent attorney Takehiko Matsumoto

Claims (3)

[Claims] (1) A method for dyeing a wood veneer, which is characterized by containing hydrogen peroxide in the wood veneer when dyeing the wood veneer with a dyeing solution. (2) The wood veneer according to claim 1, wherein hydrogen peroxide is added to the wood veneer by applying a hydrogen peroxide solution linearly to the surface of the wood veneer. Method of staining plates. (3) Claim 1 or 2, wherein the content of hydrogen peroxide is set so that the amount of hydrogen peroxide is 1 to 5 times per liter of bone dry wood veneer. Method for staining wood veneers as described in section.