JPH0442162B2 - - Google Patents

Description

[Detailed description of the invention]

[Technical Field] The present invention relates to a method for manufacturing dyed veneers used for purposes such as manufacturing artificial decorative veneers, which are used as cosmetic agents for interior building materials, and artificial decorative veneers made using the dyed veneers. Concerning the manufacturing method of boards. [Background Art] Artificial decorative veneer is used as a veneer for decorative boards. This artificial decorative veneer is usually made as follows. That is, wood veneers obtained by rotary slicing are degreased and bleached, then dyed, and the resulting dyed veneers are laminated with an adhesive.
It is made by pressure molding to obtain a composite fritsch, which is then sliced. Needless to say, when going through each of the above steps, it is important to reduce the quality or yield of the dyed veneer and to shorten the process. [Object of the Invention] It is an object of the present invention to provide a method that can smoothly and easily produce a suitable dyed veneer and a suitable artificially decorated veneer. [Disclosure of the Invention] In order to achieve the above object, the present invention provides that, in dyeing a wood veneer, 20 to 30% by weight of H ₂ O ₂ is added to distilled water or purified water to the wood veneer prior to dyeing. The first aspect of the dyed veneer is that _the dyed veneer is treated with H ₂ O ₂ solution in _which 5 to 10% by weight of NH ₄ OH is dissolved. When slicing the assembled fritsch to obtain artificially decorated veneers, add 20 to 30% by weight of H ₂ O ₂ and 5 to 10% of NH ₄ OH to distilled or purified water for dyed veneers.
The second gist is a method for manufacturing an artificial decorative veneer, which is characterized by using a veneer treated with H ₂ O ₂ in a H ₂ O ₂ solution containing % by weight of the veneer. . This will be explained in detail below. Wood veneers are obtained by conventional methods such as rotary slicing of logs. This wood veneer is then dyed. A feature of the present invention is that this dyeing process involves the following H ₂ O ₂ treatment. (1) H ₂ O ₂ treatment (removal of tar) In the past, when wood veneers had defects such as tar spots, they were usually discarded. Therefore,
The yield of dyed veneer was poor. However, some attempts have been made to remove tar. for example,
Wood veneer was heated to 95±3℃ using 1% Na ₂ CO ₃ solution.
Degreasing treatment was performed. However, this treatment method could only remove tar with small defects. Even if the treatment time is extended, at best the tar will be removed, and if this is done, the wood veneer will not be finished in the desired color tone in the next treatment process, which is bleaching and dyeing. There was a drawback. In contrast, in this invention, the following steps are taken. That is, the wood veneer is first lightly degreased. This degreasing process requires conventional
A dilute aqueous solution of Na ₂ CO ₃ is used. Next, a H ₂ O ₂ solution is applied partially to the tar areas of the wood veneer to remove the tar.
In this way, the resin can be removed extremely effectively, and the wood veneer is not altered in quality, that is, it does not adversely affect the subsequent staining. Therefore, the yield of dyed veneers can be improved. Specifically, first, the entire wood veneer is degreased, and then the resin parts are treated.
Apply H ₂ O ₂ solution partially and leave it. _{H2O2 _}
As the solution, an aqueous solution containing 20 to 30% by weight of H ₂ O ₂ is used, and if necessary, 5 to 10% by weight of NH ₄ OH is added. Distilled water or purified water may be used as the water. This is because ordinary water contains iron and other substances, which causes H ₂ O ₂ to decompose rapidly, making the bath unstable. After applying the above H ₂ O ₂ portions, the entire wood veneer is subjected to the usual bleaching treatment and dyed. According to the above method, the yield of dyed veneer is 8
~15% improvement. Table 1 shows the tar removal effect.

〔Effect of the invention〕

As described above, this invention allows suitable dyed veneers and suitable artificially decorated veneers to be produced smoothly and easily, improves the quality and yield of dyed veneers, and improves the production process of artificially decorated veneers. It has remarkable effects such as shortening the length. One reason for this is that a sufficient amount of H ₂ O ₂ dissolved in distilled or purified water can exert its medicinal effects without falling into an unstable state, so that proper H ₂ O ₂ treatment can be carried out smoothly. This is because the process progresses smoothly to obtain a suitable dyed veneer and, by extension, a suitable artificially decorated veneer. Another reason is that during implementation, the H ₂ O ₂ solution is mixed with a predetermined amount of H ₂ O ₂ and NH ₄ It can be easily obtained by dissolving OH in distilled water or purified water, and then immersing it in H ₂ O ₂ solution.
This is because the same operations as in the past, such as coating treatment, are sufficient.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram illustrating how the decolorizing agent is applied.

Claims (1)

[Claims] 1. When dyeing a wood veneer, add 20% H ₂ O ₂ to distilled or purified water to the wood veneer prior to dyeing.
~30 wt%, 5-10 wt% _NH4OH dissolved
A method for producing a dyed veneer, characterized by performing H ₂ O ₂ treatment with a H ₂ O ₂ solution. 2 H ₂ O ₂ treatment is applied to the resinous parts of the wood veneer.
A method for producing a dyed veneer according to claim 1, which comprises removing tar by applying a H ₂ O ₂ solution. 3. When laminating dyed veneers and slicing the resulting laminated fritches to obtain artificial decorative veneers,
As a dyed veneer, add _H2O2 to distilled or purified water _.
1. A method for producing an artificially decorated veneer, characterized by using a veneer treated with H ₂ O ₂ with a H ₂ O ₂ solution in which 20 to 30% by weight of NH ₄ OH and 5 to 10% by weight of NH 4 OH are dissolved. 4. The method for manufacturing an artificially decorated veneer according to claim 3, wherein the H ₂ O ₂ treatment is to remove the tar by applying a H ₂ O ₂ solution to the tar part of the wood veneer prior to dyeing. . 5. Claim 3, wherein the H ₂ O ₂ treatment is decolorizing the dyed veneer by applying a H ₂ O ₂ solution to a portion of the veneer.
Manufacturing method of artificially decorated veneer as described in Section 1.