JPS6038102A - Manufacture of dyed veneer and manufacture of artificial decorative 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] [Technical Field] This invention relates to a method for manufacturing dyed veneer used for manufacturing artificial decorative veneers used as decorative materials for interior building materials, and an artificial decorative veneer using this dyed veneer. Concerning the manufacturing method.

[Background technology]

Artificial decorative veneer is used as a veneer for decorative boards.

This artificial decorative veneer is usually made as follows. That is, the veneers obtained by rotary slicing or the like are degreased and bleached, then dyed, the obtained dyed veneers are laminated with an adhesive, pressure molded to obtain an assembled flitch, and this is sliced. It is obtained by When manufacturing such artificially decorated veneers, as a dimensional stabilization treatment for the wood veneers used, polyethylene glycol is applied to the dried veneers, or impregnated by immersing the dried veneers in a polyethylene glycol solution. Processing is in progress. but,
In such an impregnation treatment, the treatment agent is actually impregnated into the inside of the veneer, and most of it is attached near the surface. In addition, although it fills the cell lumen, there is little impregnation into the cell membrane2.Furthermore, high molecular weight polyethylene glycol is difficult to enter the inside of the veneer, while low molecular weight polyethylene glycol is difficult to penetrate inside the veneer. Although it easily enters the liquid, it has the disadvantage that it is easy to flow out depending on the solution.

[Purpose of the invention]

This invention was made in view of the above circumstances, and an object of the present invention is to obtain a dyed veneer and an artificially decorated veneer that are dimensionally stable without any dimensional change when producing a dyed veneer and an artificially decorated veneer. .

[Disclosure of the invention]

The inventors have made extensive studies to achieve the above object. As a result, this invention was completed.In dyeing a wood veneer, a low molecular weight chemical solution is applied to the wood veneer and steamed, and then the molecular weight is lower than that of the low molecular weight chemical solution. The first gist is a method for manufacturing dyed veneers, which is characterized by using a chemical solution with a high molecular weight and steaming, and the dyed veneers are laminated and laminated,
To obtain artificial decorative veneers by slicing the obtained laminated flitch, a low molecular weight chemical solution is applied and steamed to obtain a dyed veneer, and then the steamed wood veneer is dyed with the low molecular weight chemical solution. The second gist is a method for manufacturing artificial decorative veneers, which is characterized by using the following materials.

These will be explained in detail below.

The chemical liquid referred to in this invention includes, for example, ethylene glycol,
Diethylene glycol and polyethylene glycol (
PEG), polyethylene glycol methacrylate (P
EGMA) or its solution. These chemical solutions are used in combination of low molecular weight ones and high molecular weight ones. Furthermore, as a high molecular weight chemical solution, the molecular weight is usually 2000 to 30.
00 is particularly preferably used.

In the first invention, when dyeing a wood veneer, a low molecular weight chemical solution is applied to the wood veneer and steamed (exposed to a steam atmosphere), and then a high molecular weight chemical solution larger than the low molecular weight is applied to the wood veneer. It is characterized by the fact that it is applied and steamed. Specifically, a wood veneer obtained by rotary lace or slicing is degreased and decolorized according to a normal process, and then a low molecular weight chemical solution is applied to the veneer. After this, for example, 95-1
The steaming process is performed under the conditions of 0.5°C and 100% humidity. This steaming process uses heat to diffuse low-molecular-weight chemical solutions into the interior of the veneer and causes them to be adsorbed to cell membranes. However, if the water content is too high, there will be too much water near the surface of the veneer, making it difficult to apply the chemical solution successfully, so it is preferably 40 to 100%, particularly preferably 70 to 80%.

Next, after drying the treated veneer, a chemical having a higher molecular weight than the low molecular weight chemical is applied. After this, the steaming process is performed under the same conditions as the first steaming process. This second steaming process promotes the action of the high molecular weight drug solution to fill the conduits and intracellular cavities of the veneer. For this reason, it is better to dry the veneer after steaming, which has been coated with a low-molecular-weight chemical solution, with a moisture content of 10%.
The following are preferred.

In such chemical liquid application and steaming treatment,
The low-molecular-weight drug solution fills the microscopic voids and cell membranes within the veneer. The next high-molecular-weight chemical solution fills the macroscopic voids in the veneer and prevents the low-molecular-weight i-liquid from migrating (moving) and flowing out.

The veneer treated with chemicals and steamed in this way is dyed to make a dyed veneer. The obtained dyed veneer becomes stable with no dimensional change.

In the second invention, the dyed veneers obtained in the first invention are laminated and laminated as usual, and the resulting flitches are sliced to obtain artificial decorative veneers. That is, the second invention involves MWing a plurality of the dyed veneers obtained in the first invention, or the dyed veneer and other veneers or prepregs as needed via an adhesive, and molding them. Pressure molding is performed using an appropriate mold, such as a mold with a flat surface or a mold with irregularities on the mold surface.
To obtain an assembled flitch without unevenness change or an assembled flitch with unevenness change such as curvature. This assembled flitch is sliced at a desired angle to reveal the grain or straight grain to obtain an artificial decorative veneer. This artificial decorative veneer becomes stable without dimensional changes.

Examples will be described below.

[Example 1] Agati rotary veneer with a thickness of 1.0 +u+ was
Pretreated in water at 2°C and dried to a moisture content of 75%. Next, a total amount of 98.0 g/nf to 108.9 g/rrf (9=
It was coated until it reached 10 g/shaku2). Then 95~
After steaming treatment in 105°C steam for 2 hours, it was dried until the moisture content became 10%. Next, molecular weight 250
A 50% aqueous solution of polyethylene glycol of 108.
After applying 9 g/rd (10 g/shaku 2), 95-1
Steaming treatment was carried out in steam at 05°C for 1°5 hours. As a result, the results of Example 1 were as follows:
The shrinkage rate was about 172. Using this material, a dye was applied as usual to obtain a dyed veneer.

The obtained dyed veneer was stable with no dimensional change.

[Example 2] A plurality of dyed veneers obtained in Example 1 were laminated via an adhesive, and this was press-molded using a curved mold to create an assembled flitch. This laminated flitch was sliced to obtain an artificial decorative veneer.

The obtained artificially decorated veneer was stable with no dimensional change.

〔Effect of the invention〕

In the first manufacturing method according to the present invention, when dyeing a wooden veneer, a low molecular weight chemical solution is applied to the wood veneer and steamed, and then a high molecular weight chemical solution having a larger molecular weight than the low molecular weight ψ chemical solution is applied to the wood veneer. Since the dyed veneer is coated and steamed, the resulting dyed veneer has anti-shrinkage properties and is stable without dimensional changes.

Moreover, in the case of traditional immersion methods, the processing solution is contaminated and
However, the present invention is not affected by contamination because a new chemical solution with the same components is always applied through the two-stage coating steaming process. Therefore, the treatment effect of the chemical solution does not deteriorate.

Further, in the second manufacturing method according to the present invention, the dyed veneers obtained in the first invention are laminated and laminated, and the obtained laminated flitch is sliced to make an artificial decorative veneer. The veneer has anti-shrinkage ability and is stable without dimensional changes.

〔reference〕

In addition, when manufacturing artificially decorated veneer, if the following treatment is performed, it is possible to obtain wood grain with uneven color change. That is, the dye 2 is uniformly applied to the entire surface of a wooden veneer 1 as shown in FIG. 1 obtained by rotary lace or slicing, and then one layer is laminated as shown in FIG. 2, followed by steaming. . Next, partial drying is performed using an oven or the like. Partial drying is carried out by placing or interposing, for example, a material 4 with good thermal conductivity on the upper surface of the dyed veneer 3 or between the dyed veneers, as shown in FIG. As a result, the portion that comes into contact with the substance 4 having good thermal conductivity becomes more easily conductive and heated, and adsorption of the dye is promoted. As a result, as shown in FIG.
A dyed veneer 7 that is dyed in a darker color is obtained. next,
The dyed veneers 7 are laminated and pressed to form an assembled flitch 8 as shown in FIG. When this flitch assembly 8 is sliced, an artificial decorative veneer 10 is obtained in which the wood grains 9a, 9b, and 9c have uneven color changes, as shown in FIG.

In addition, in partial drying, by changing the arrangement of materials with different thermal conductivity, their width, length, thickness, contact position, etc., and by changing the drying temperature, time, and other conditions, various combinations can be used. , it is possible to express the color unevenness rich in various changes in the wood grain of artificially decorated veneer.

In addition, in the conventional manufacturing process of artificially decorated veneers, the printing process and the steaming process are separated, so the production efficiency is low. In addition, because the grain is dyed evenly, there is little color variation, and the resulting artificially decorated veneer is 2. The problem was that it lacked a sense of nature.

To solve this problem, you can do the following. That is, when producing a dyed veneer to be used as a material for an artificially decorated veneer, as shown in FIG. 7, dye is sprayed from a dye nozzle 11a onto the veneer 12 for printing. At the same time, steam is ejected from the nozzle llb onto the veneer 12 while changing the steam pressure appropriately to perform steaming. As a result, the resulting dyed veneer has uneven color due to changes in the vapor pressure of the steam used for steaming, giving it an excellent natural feel.

(Reference Example) A dye was sprayed onto a Teva decolorized veneer of T#b 1 m+a, and at the same time as printing, steam was applied for 2 hours to perform steaming. At this time, the vapor pressure was changed over time by operating a valve. Appropriate color variations were observed in the obtained dyed veneer.

By employing such processing, the printing process and the steaming process become one process, improving production efficiency. Moreover, by changing the vapor pressure of the steam used for steaming over time, variations occur in the state of dye impregnation. For this reason, if there are variations in the veneer material, the color variations will be noticeable, making it possible to express a natural look. This effect is further enhanced by simultaneous spraying of dye and steam.

[Brief explanation of drawings]

Figure 1 is a perspective view of a wooden veneer coated with dye, Figure 2 is a perspective view of the dyed veneer laminated and steamed, and Figure 3 is a perspective view of the partially dried state of the dyed veneer. Figure 4 is a perspective view showing a partially darkened dyed veneer, Figure 5 is a perspective view showing the laminated flitch, Figure 6 is a perspective view of an artificially decorated veneer, and Figure 7 is a perspective view showing a partially dark colored veneer. It is a perspective view showing the state of spray printing and steaming of a veneer. 1...Wood veneer 3...Dyed veneer, 4...Material with good thermal conductivity 5...Contact part 6...Non-contact part 9a, 9b, 9c...Wood grain 10...・Artificial decorative veneer 11a, llb...Nozzle agent Patent attorney Takehiko Matsumoto

Claims (1)

[Scope of Claims] 411 When dyeing a wood veneer, a low molecular weight chemical solution is applied to the wood veneer and steamed, and then a high molecular weight chemical solution having a larger molecular weight than the low molecular weight chemical solution is applied to the wood veneer. A method for manufacturing dyed veneer, characterized by using a coated and steamed material. (2) The method for producing a dyed veneer according to claim 1, wherein the chemical solution is at least one selected from ethylene glycol, diethylene glycol, polyethylene glycol, and polyethylene glycol methacrylate, or a solution thereof. (3) When laminating dyed veneers and slicing the resulting assembled flitch to obtain an artificially decorated veneer, the dyed veneer is coated with a low molecular weight chemical solution and steamed, and then the low molecular weight chemical solution is applied and steamed. A method for producing an artificial decorative veneer characterized by using a wooden veneer that is steamed and dyed by applying a high-molecular-weight chemical solution that has a higher molecular weight than the chemical solution. (41) The method for producing an artificial decorative veneer according to claim 3, wherein the chemical solution is at least one selected from ethylene glycol, diethylene glycol, polyethylene glycol, and polyethylene glycol methacrylate, or a solution thereof.