JPS61279555A - Manufacture of 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] The present invention relates to a method for manufacturing a decorative veneer that artificially expresses a wood grain pattern close to that of natural wood species.

[Background technology]

In the conventional manufacturing method for decorative veneers, a material veneer is dyed, then multiple pieces are laminated with an adhesive and bonded by pressure to create a composite flitch, and this composite flitch is sliced from a predetermined direction. By doing so, wood grain patterns such as board-grain patterns and straight-grain patterns were expressed on the board surface. In this case, it is preferable to express the color unevenness seen in natural wood species in order to improve the natural look, but the conventional dyeing method of simply dipping the material veneer in a dye solution It was not possible to impart color unevenness to the veneer.

Therefore, focusing on the fact that the chromophore of the dye causes the dye to develop different colors depending on the atmosphere, it was proposed to impart color unevenness to the material veneer. In other words, the atmosphere of the chromophore is such that the color of the dye molecules differs when the dye is dissolved at high temperatures and when it is dissolved at low temperatures, or when organic solvents (alcohols, etc.) are used. Determined by factors such as association state and solvation.

Therefore, in the normal dipping method, if a coloring control agent such as an organic solvent is applied unevenly in advance within or between the veneers of the material, uneven coloring will occur within the veneer of the material or between the veneers of the material. should be possible.

However, in reality, desired color unevenness could not be created for the following reasons.

(a) A color modifier is diffused into the bath and diluted.

(b) Since the dyeing solution is generally impregnated at high temperatures, the molecular motion of not only the dye molecules but also the molecules of the coloring modifier becomes large at high temperatures, making it difficult to produce uneven color.

[Purpose of the invention]

An object of the present invention is to provide a method for manufacturing a decorative veneer that can form color unevenness with a rich natural feel.

[Disclosure of the Invention] This invention relates to the production of decorative veneers by dyeing a material veneer, then laminating a plurality of the veneers through an adhesive and press-bonding them to create a composite flitch, and slicing this composite flitch. In the method, a coloring adjustment agent is preliminarily applied to the material veneer unevenly within the material veneer or between the material veneers, and then the material veneer is immersed in a dyeing solution, and then pressure is applied to dye the material veneer. It is characterized by:

Therefore, according to the present invention, the coloring adjustment agent is attached to the material veneer, and the material veneer is immersed in the dyeing liquid and then pressurized, so that the coloring adjustment agent attached to the material veneer is spread. As a result, desired color unevenness can be removed, and a decorative veneer with a rich natural feel can be obtained.

As the coloring control agent, liquid substances such as organic solvents can be used, such as alcohols such as ethyl alcohol, and polyethylene glycols.

Examples include acrylic esters and methacrylic esters.

Figures 1 to 3 below show a method for manufacturing a decorative veneer in which a coloring adjustment agent is applied unevenly within the material veneer to form color unevenness.
This will be explained with reference to the figures. That is, as shown in FIG. 1(A), first, the coloring adjustment agent 2 is applied partially to the raw material veneer 1, and the coloring adjusting agent 2 is applied unevenly to the raw material veneer l. Next, as shown in (B) and (C) of the same figure, a plurality of the material veneers 1 are placed in a pressure-resistant container 3 and heated at 1 to 20 mH.
After being left under reduced pressure of H for 10 minutes to 2 hours, the staining solution 4 is poured into the container 3 while maintaining the reduced pressure.

Thereafter, the material veneer 1 is taken out from the container 3 after being pressurized for 10 minutes to 2 hours at a pressure of 5 to 15 kg/cd (D)), and dried to remove the dyed veneer with color unevenness formed on the surface. A plate 5 can be obtained. As shown in FIG. 2, a plurality of dyed veneers 5 are laminated in a concavo-convex mold 6 using an adhesive and bonded by pressure to create an assembled flitch 7, which is then sliced in a direction intersecting the lamination direction. do. Thus, the third
As shown in the figure, a decorative veneer 8 with a grain pattern in which uneven color 9 is expressed on the board surface is obtained.

The above-mentioned dyeing operation is performed at room temperature, but if necessary, it may be heated with steam or the like, or the dyeing solution may be placed in the container 3 and then the pressure is reduced (or the pressure may be reduced). Alternatively, the raw material veneer 1 may be soaked in the dyeing solution 4 and then pressurized.

On the other hand, in order to form unevenness of the coloring adjustment agent between the material veneers,
As shown in FIG. 4, using a sponge roll coater 1O, the color adjustment agent 2 is applied over the entire surface of each material veneer 1 in different amounts to prevent uneven adhesion of the color development adjustment agent 2 between the material veneers 1. Let it form. This material veneer 1 is shown in Figure 1 (B).
When dyeing is carried out under reduced pressure and then increased pressure as shown in (E), a dyed veneer 11 with color unevenness formed between the veneers as shown in FIG. 5 is obtained. After that, a composite flitch is created using the dyed veneer 11 in the same manner as shown in FIG.
It is possible to obtain a decorative veneer 13 in which color unevenness is formed between adjacent parts (parts corresponding to the veneer 1 of each material) with the veneer 2 interposed therebetween.

In addition, the uneven adhesion of the color adjustment agent 2 can be determined by changing the amount of color adjustment agent 2 applied between the veneer impregnated with a large amount of the color adjustment agent 2 and the veneer impregnated with only water without the color adjustment agent. adjust. At that time, a spray or the like may be used instead of the sponge roll coater 10.

In the above explanation, the decorative veneer 8 with a grain pattern is explained using the uneven mold 6.
, 13, but it is also possible to obtain a decorative veneer with a straight grain pattern using a flat mold (not shown).

Next, the method of the present invention will be explained in detail with reference to Examples.

Example: Material veneer (Aius veneer 1 dimension 5 x 7 x 1 fi
) is dried to a moisture content of 10-15%, then 0-100 g of methacrylic acid ester (coloring control agent) is applied between the veneers.
It was applied by spraying with variations within the Zrd range to create uneven adhesion of the coloring modifier between the veneers of the material. Then,
Place 10 veneers of these materials in a pressure-resistant container and apply a pressure of 10
After leaving it under a reduced pressure of fiHg for 1 hour, 300 ml of staining solution was injected into the container while maintaining the reduced pressure, and then the pressure was reduced to 1
Pressure was applied at 0kr/C- for 1 hour to obtain a plurality of dyed veneers with color unevenness formed between the veneers. These dyed veneers were dried to a moisture content of 30 to 40%, and urethane adhesive was applied to one side of the veneer.
Coat with a coating amount of 0 to 100 g/n (laminate and apply at a pressure of 10 g/n)
A composite flitch was created by pressure bonding at ~12 kg/aj for 2 to 3 hours, and this was sliced to a thickness of 0°2 to 0.3 m, so that areas of different colors were adjacent to each other on the board surface through the annual ring lines. A decorative veneer with a natural feel was obtained.

[Effect of the invention] According to this invention, a coloring adjustment agent is attached to a material veneer,
Since this material veneer is immersed in the dyeing solution and then pressurized, the coloring adjustment agent attached to the material veneer is difficult to diffuse (and as a result, it is difficult to create the desired color unevenness). This has the effect of making it possible to obtain a decorative veneer with a rich natural feel.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of the process for obtaining a dyed veneer in this invention, Fig. 2 is an explanatory diagram of the next process using the obtained dyed veneer, and Fig. 3 is an example of the obtained decorative veneer. A plan view, FIG. 4 is an explanatory diagram showing the formation of uneven adhesion of the coloring control agent between the material veneers, FIG. 5 is an explanatory diagram of the obtained dyed veneer, and FIG. 6 is another example of the decorative veneer. FIG. DESCRIPTION OF SYMBOLS 1...Material veneer, 2...Coloring adjustment agent, 4...Dyeing solution, 5...Dyed veneer, 7...Assembly fringe, 8,1
3... Decorative veneer Figure 3

Claims (3)

[Claims] (1) A method for manufacturing a decorative veneer in which a material veneer is dyed, a plurality of the material veneers are then laminated with an adhesive and pressure-bonded to create a composite flitch, and the material veneer is sliced. The method is characterized in that a coloring control agent is pre-applied unevenly within or between the veneers of the material, and then the veneer of the material is immersed in a dyeing liquid, and then pressure is applied to dye the veneer of the material. Method of manufacturing decorative veneer. (2) Claim No. 1, wherein the coloring control agent is one or more of alcohols, polyethylene glycols, acrylic esters, and methacrylic esters.
1) The method for producing a decorative veneer as described in section 1). (3) The method for manufacturing a decorative veneer according to claim (1), wherein the raw material veneer to which the coloring control agent is attached is immersed in the dyeing solution under reduced pressure.