JPS608002A - Manufacture of artificial decorative flitch - 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 artificial decorative plywood used as a building material and the like.

[Background technology]

One of the ways to make artificial decorative plywood is as follows. First, veneers are laminated with colored adhesive to create a flitch, and this flitch is sliced to create laminated sliced veneers. The adhesive layer of this laminated sliced veneer expresses the wood grain pattern. Next, this laminated sliced veneer is pasted on plywood, and dye (paint) is applied to match the color.
After applying a top coat and coloring, artificial decorative plywood is obtained.

However, the decorative plywood obtained as described above has a problem in that the wood grain pattern of the laminated sliced veneer adhered to the base plate becomes thinner when the color is toned.

[Object of the Invention] An object of the present invention is to provide an artificial decorative plywood having a deep and clear wood grain pattern.

[Disclosure of the Invention] In order to achieve the above-mentioned objects, the present invention involves bonding laminated sliced veneers obtained from a flitch made by laminating veneers to plywood using a urethane-based colored adhesive. In the manufacturing method of artificial decorative plywood, which includes a process and a process of applying color toning to the surface of the laminated sliced veneer, use a layered sliced veneer whose surface is coated with a dye and then subjected to a steaming treatment. Its gist is a manufacturing method for artificially decorated plywood that is characterized by: This invention will be explained in detail below.

First, a flitch is created by laminating veneers using colored urethane adhesive, and then this flitch is sliced. In this way, a laminated sliced veneer in which the adhesive layer expresses a wood grain pattern is obtained. Next, after applying the dye, steaming is performed. As the dye, it is preferable to use an acidic dye. Steaming darkens the colored adhesive layer, which gives it a wood grain pattern.

Therefore, even if this laminated sliced veneer is attached to plywood and the color is toned by applying dye, the wood grain will not become lighter, and artificial decorative plywood with a deep wood grain pattern can be obtained. . Note that the laminated sliced veneer may be subjected to color toning processing before being attached to the base plate.

〔Effect of the invention〕

Since the method for producing artificial decorative plywood according to the present invention has the above-described structure, it is possible to obtain a product with a deep wood grain pattern.

, Next, an example will be described.

A flitch was made by laminating IUS rotary veneers with a thickness of 1 mm in a straight-grain pattern using a colored urethane adhesive. Next, we performed straight-grain slicing to create laminated sliced veneers. Approximately 50 g/rd of acidic dye toned to a pale oak color was applied to this laminated sliced veneer, and steaming treatment was performed for about 2 hours to obtain a colored sliced veneer. After this, the colored sliced veneer was attached to the plywood, and the color was toned with oak-colored paint to obtain artificial decorative plywood with an oak pattern. This artificial decorative plywood has a deep wood grain pattern.

〔reference〕

In addition, according to the manufacturing method of laminated decorative wood explained below, it becomes possible to express the transition part from the spring wood expression area to the summer wood expression area well, so it is possible to obtain something close to natural precious wood. can.

With the conventional manufacturing method of laminated decorative materials, it is not possible to properly express the transition area from the spring wood expression area to the summer wood expression area, so the result is only laminated decorative materials with a woodgrain pattern that looks like a print and lacks a sense of reality. I couldn't.

Next, we will explain a method for producing laminated decorative wood that is close to natural precious wood.

First, uncolored thin veneers or multiple pieces of veneer colored thinner than the final color are laminated with adhesive, and then a pair of upper and lower mold plates with curved mold surfaces are made. Press to create a flitch as shown in Figure 1. Here, the flitch is curved in the width direction. In the figure, 1 is a single plate.

Next, the flitch is sliced diagonally to the length direction to obtain sliced veneers. Then, Figure 2 (
al, (as shown in bl, a sliced veneer is obtained in which the adhesive layer 2 appears like a board grain on the surface and extends diagonally to the surface inside. Next, the sliced veneer is Apply a colored liquid to the surface of the board and allow it to penetrate inside.This can be done, for example, by placing a cloth impregnated with the colored liquid on the surface of the sliced veneer and pressing it.In this case, press The pressure is the type 2 moisture content of the thin veneer used.

Determine according to the particle size of the colored liquid, etc. For the purpose of facilitating the penetration of the colored liquid, pressurization, depressurization, or heating is performed as necessary. Also, as a paint, substances with high magnetic permeability, such as iron, cobalt.

It is also possible to use a material containing metal such as nickel and provide a magnetic field to attract a substance with high magnetic permeability, thereby making it easier for the colored liquid to penetrate. As shown in FIG. 3, the colored liquid 3 permeates from the front side to the back side (arrow in the figure), but when it hits the adhesive layer 2, the progress stops. At this time, since the adhesive layer 2 is slanted, between the front exposed portion 2a and the back exposed portion 2b of the adhesive layer 2, the progress of the portion near the front exposed portion 2a is stopped quickly. When the progress stops quickly, the concentration of the coloring liquid increases, so when looking at the sliced veneer from the front, the part closer to the front side exposed part 2a side is colored darker, and the part closer to the back side exposed part 2b side is lighter (colored). .

Further, the portion without the adhesive layer 2 is colored lighter than the portion with the adhesive layer 2. Therefore, as shown in FIG. 4, a certain darkly colored part of the adhesive layer 2 can represent summer wood, while other lightly colored parts can represent spring wood. In the area from the spring wood expression area 4 to the summer wood expression area 5, due to the presence of the diagonal adhesive layer 2, the transition area 6 can be expressed as well as a natural one.

Note that the sliced veneer is made from a flitch in which multiple veneers are laminated with an adhesive, but a predetermined number of sheets of different materials such as paper, nonwoven fabric, or plastic boards and a plurality of veneers are laminated together using an adhesive. It may also be made from a flitch formed by laminating two layers with an adhesive interposed therebetween.

[Brief explanation of drawings]

Fig. 1 is a perspective view of the flitch, Fig. 2 (al is a plan view of the sliced veneer, open mountain) is a longitudinal cross-sectional view of the sliced veneer, and Fig. 3 is a longitudinal cross-sectional view of the sliced veneer.
The figure is an enlarged cross-sectional view of the adhesive layer portion, and FIG. 4 is a plan view of the laminated decorative material. (7) Figure 1 (b) Figure 2

Claims (1)

[Claims] (1) A process of attaching a laminated sliced veneer obtained from a flitch made by laminating veneers using a urethane-based colored adhesive to plywood, and a process of applying color toning to the surface of the laminated sliced veneer. A method for manufacturing artificial decorative plywood comprising using a layered sliced veneer whose surface is coated with a dye and then subjected to a steaming treatment.