JPS594285B2 - Manufacturing method of wood decorative veneer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing decorative wood veneers.

Conventionally, in order to artificially manufacture natural wood-like wood veneers,
As shown in Fig. 1, a dark-dyed wood veneer 1 and a light-colored wood veneer 2 are alternately laminated and glued to form a flitch 3, and the flitch is aligned as shown by arrow A with respect to the laminated surface. A method is used in which the decorative veneer 4 is obtained by slicing it at a certain angle.

However, in the decorative veneer 4 obtained in this way, as shown in FIG. 5' and has a wood grain shape, but in the autumn wood part 5, the part 5a corresponding to the outer layer surface of the wooden veneer 1 is colored darker than the inner layer part 5b, creating a difference in shade, as if a line was drawn with the coracoid. It exhibited what is commonly known as a "grain" effect, and had a different texture from natural wood grain.

This is because when the wood veneer 1 is dyed, there is a concentration gradient of the dye, which causes the interior of the wood veneer 1 to be lighter in color than the surface due to the difference in dyeing speed (diffusion rate) and dye amount, and the wood is removed from the dye solution. This occurs because the surface concentration increases due to evaporation and transpiration of the dye liquid that adheres to the surface of the veneer 1 and takes it out, and is unavoidable to some extent in the process.

In addition, in order to form dark and light colored areas on the decorative wood veneer, two pieces of veneer that had been dyed in the spring wood color were pressed together and dyed again, and the surface side was dyed again to create a dark colored autumn wood area. However, due to variations in the density of the wood veneer, the permeability of the dye varies and the width of the dark colored area is inconsistent, resulting in variations in the wood grain pattern for each decorative veneer, resulting in poor reproducibility. There was a problem of scarcity.

Therefore, an object of the present invention is to provide a method for stably producing decorative wood veneer having a wood grain that closely resembles natural wood.

The features of this invention will be explained using FIG. 3.

That is, this invention dyes a wooden veneer, decolorizes both sides of it with a bleaching agent to make the color tone uniform in the thickness direction, and then laminates and adheres this together with other wooden veneers to form a flitch. It is characterized by slicing it into plate shapes. For example, if necessary, a veneer of material obtained by slicing raw wood is first decolored to make it uniform in color, and then it is dyed to produce autumn wood. A dark colored veneer and a light colored veneer of spring wood color are obtained.

And H20□ on the surface of this dark veneer. Na C110
2. After applying a decolorizing agent such as Na2SOs to adjust the difference in shading between the dark part 6a and the shallow part 6b existing in the thickness direction of the dark veneer 6 as shown in FIG. They are alternately laminated and glued to form a flitch, and the flitch is sliced at a fixed angle to the laminated surface to create a decorative veneer with a straight-grain pattern.

By using this method, the surface of the resulting wood decorative veneer will have an appearance that closely resembles natural wood grain, without any unnatural fall wood areas such as lines drawn by the coracoids.

As described above, the method for manufacturing decorative wood veneer of the present invention is as follows:
After dyeing a wooden veneer, both sides are bleached with a bleaching agent to make the color tone uniform in the thickness direction, and this is laminated and glued together with other wooden veneers to form a flitch, and the flitch is sliced into veneers. Because of this feature, it has the effect of stably producing wood decorative veneer with a grain that closely resembles natural wood.

Example 1 Agatis material with thickness of 0.6 mN, 0.8 mN, 1.0
In order to form the wood grain of natural pine, the material veneer obtained by rotary cutting was first dyed under the following dyeing conditions A and B. I obtained a dark autumn wood colored veneer.

Dyeing conditions A: Boiled in a 0.015% aqueous solution of Nisminol Milling Brown 3G (CI Acid Brown 13, manufactured by Sumima Kagaku Kogyo Co., Ltd.).

Dyeing Condition B: Boiled in an aqueous solution of Nisminol Milling Brown 3G 1.2% and Ranil Brown 7R (manufactured by Sumitomo Chemical Co., Ltd.) 0.007%.

For the autumn wood-colored veneer, H20□ water (35% aq) with a pH of 9 to 10 was applied to both the front and back surfaces to partially decolorize the veneer, followed by washing with water.

The moisture content of the spring wood colored veneer and autumn wood colored veneer thus obtained was adjusted to about 70%, and the desired thicknesses were combined, and the spring wood colored veneer and the autumn wood colored veneer were combined. They were alternately laminated, glued, and pressed to form a flitch, which was then sliced at a constant angle to the laminated surface to obtain a decorative wood veneer.

This decorative wood veneer did not have the coracoid effect in the autumn wood-colored areas, and its appearance closely resembled that of natural pine wood.

Example 2 A veneer of the same material as in Example 1 obtained from agathis wood was first decolorized with H20□, and then a spring wood color veneer was obtained under the following dyeing conditions C, and an autumn wood color veneer was obtained under the dyeing conditions. were obtained respectively.

Dyeing conditions C: Boil in an aqueous solution of dye Suminol Milling Brown 3G 0.12% and Ranil Brown 7R 0.0067%.

Dyeing conditions D: Boiling in an aqueous solution of dye Suminol Milling Brown 3 GO, 2% and Ranil Brown 7R 0.05%.

Apply 11% H20□35% aqueous solution to the surface of this autumn wood colored veneer.
After coating at 0g/7f, it was dried to decolorize the surface area.

Next, the bleached autumn wood color veneer and the spring wood color veneer were alternately laminated, adhered and pressed together to obtain a flitch.

When this flitch was further sliced, a decorative wood veneer that closely resembled a veneer made of high-grade natural wood was obtained.

[Brief explanation of the drawing]

Figure 1 is a process diagram of the conventional method for manufacturing decorative wood veneers, Figure 2
The figure is an enlarged perspective view of the veneer obtained by the process, and FIG. 3 is an enlarged side view of the dyed veneer at the main part of the process of this invention. 1.2... Wood veneer, 3... Flitch, 4... Decorative veneer, 6... Dark veneer, 6a... Sewing section, 6b...
・Shallow area.

Claims (1)

[Claims] 1 After dyeing the wood veneer, both sides are bleached with a bleaching agent to make the color tone uniform in the thickness direction, and this is laminated and glued together with other wood veneers to form a flitch, and the flitch is sliced into veneers. A method for manufacturing decorative wood veneer, characterized by: