JPH01113204A - Manufacture of woody decorative veneer - Google Patents

Abstract

PURPOSE:To realize external appearance having feel of wood without impairing the virture of wood and at the same time improve the heat resistance of a veneer by a method wherein a flitch is formed by applying flexible adhesive with large extensibility to wood chips and, after that, the wood chips are made into a block by compression molding and finally sliced. CONSTITUTION:Wood chips 1, which are produced by slicing wood 6, are coated with flexible adhesive with large extensibility and, after that, compression- molded with a pressing device 2 in order to form a flitch 3. A woody decorative veneer 5 is formed by slicing the flitch 3 with a slicing blade 4. The woody decorative veneer 5 is pasted to a base plate and coated with clear coating at coating process. Any adhesive such as urethane adhesive, urethane emulsion adhesive, flexible polyester resin, polyvinyl acetate-based adhesive or the like will do as far as the adhesive, the extensibility of which the 30-500%, is used. The compression molding is done with the pressing device 2 by pressing the wood chips 1 in a vessel 7 with a pressing plate 8 for forming.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field 1] The present invention relates to a method for manufacturing decorative wood veneers, which is formed by pressing and forming wood thin pieces into blocks using bindu as an adhesive, and slicing the block-formed flitches. It is something.

[Background Art 1 Generally, decorative wood veneers obtained by slicing flitch are easily deformed by heat, especially in the direction perpendicular to the fibers, which causes cracks and shortens the life of the product. For this reason, efforts are being made to improve heat resistance by applying WPC treatment to the decorative wood veneer or by orthogonalizing the fiber direction of the plywood that serves as the baseboard to which the decorative wood veneer is attached, but both are burdensome in terms of cost and man-hours. It is desired that the wood decorative veneer itself be very light and have high heat resistance.

[Object of the Invention] The present invention has been made in view of the above points, and the object of the present invention is to create a wood-like appearance that does not impair the quality of wood, and yet is heat resistant. The present invention provides a method for manufacturing decorative wood veneer.

[Disclosure 1 of the Invention As shown in FIG. 1, a flexible adhesive with a high elongation rate is applied to a thin piece of wood 1 obtained by slicing a piece of wood 6, and then the thin piece of wood 1 is pressed and formed in a press device 2. A flitch 3 is formed, and a decorative wood veneer 5 is formed by slicing the flitch 3 with a slicing blade 4. This wooden decorative veneer 5 is pasted on a plywood board, and a clear coat is applied in a painting process. As shown in FIG.
-0,50a+g*), and the area is 6” 400mm2
(preferably 25 to 250 em"), and the aspect ratio (vertical width a
/width b) is 0.4 to 7.0 (preferably 0.8 to 3.
0), these wood thin pieces 1 may be rounded, and as long as the above shape is 60% or more, dimensions other than the above may be mixed in. Application of adhesive to the wood thin pieces 1 is It is done by spraying or kneading. 11 The adhesive may be urethane adhesive, urethane emulsion adhesive, soft polyester resin, vinyl acetate adhesive, etc., but one with an elongation rate of 70% to 300% is used. Pressing and forming is carried out in a press equipment fi2, and as shown in FIG. The pressure applied by this press device 2 is sufficient to crush the wood flakes 1 along the press surface, and is 2 K g/as.
"~50 Kg/am" (preferably 7Kg/c
a+”-14Kg/am2).

The reason for using the wood thin piece 1 is as follows.

(1) If adhesive wood flakes 1 are used, it is not only easy to apply the adhesive, but the wood flakes 1 themselves are easily deformed during pressing, and bonding failure due to voids and foaming of the adhesive due to insufficient pressure do not occur. . That is, a regular piece of wood like particle board.
3(a) to the state shown in FIG. 3(b), but voids may be created, and poor adhesion or foaming may occur due to insufficient pressure. If it is thin piece 1, it will be pressed from the state shown in Fig. 4(a) to the state shown in Fig. 4(b), and the wood thin piece 1 will become parallel along the pressing surface, and the rounded piece will be called No. 5. 5th from the state in figure (,)
It is folded into the state shown in figure (b), with good adhesion.
Foaming does not occur.

(2) Flitch Uniformity Approximately the entire wood flake 1 is a surface, and the application and kneading of the adhesive is extremely uniform. Therefore, the molded flitch has no compoundability. In other words, strain due to thermal stress is dispersed throughout, and concentrated strain that would cause cracks does not occur.

(3) Appearance Unlike general boards made by gluing together relatively small pieces of wood, such as [product name: Particle Board 5'' (shown in Figure 6 (a)), thin wood pieces 1 are used and compressed. When the thin wood pieces 1 are lined up parallel to the pressed surface and the wood decorative veneer 5 is sliced, a pattern of relatively large wood pieces appears as shown in FIG. 6(b), expressing a woody feel. Can be done.

The present invention will be explained in detail below using examples.

(Example) (a) Piece of wood Rice pine wood flakes Thickness 0.10~0.40ma+ Area 12-200-12 Aspect ratio 1.0-3.0 was the main component (80% or more).

(b) Adhesive Urethane adhesive GA601-01 (manufactured by Juju Bakelite) 70g was added to 100g of wood thin pieces and applied by kneading.

(e) Clamping I went for 1 hour with 10Kg Zc theory 2.

(d) Slice It was sliced to a thickness of 0.50-0.60 mm.

(e) The wood decorative veneer obtained by pasting and slicing was pasted under heat and pressure to a plywood board with a thickness of 151IIn+ using a rubber latex adhesive.

(f) Sangu It was treated with a 240 count Sangu.

(g) Undercoat Sinong Sealer NO620-39 (Chinese paint g1) was applied at a rate of 10 g/m2 using a roll coater.

(h) Drying Dry with UV light.

(i) Add 10% of styrene monomer and 0.7% of Permec N (manufactured by NOF Co., Ltd.) to F (2-minute gloss, China Paint It) and spray it to 130%.
g/m''.

(j) Drying The temperature was 110°C for 30 minutes.

A floor material using the decorative wood veneer of the present invention was created according to the above specifications.

(Results) The results of the above example are shown in the table below.
The standard of adhesion is determined by whether the block can be sliced or not. Nature 2: Cold and hot cyclic test at 100℃ (2 hours) -
The occurrence of cracks was checked at 20°C (2 o'clock I'll).

Honjo 3 7-Kuchitsuku is a shallow kuchitsuku, and 1
Nil! 0 Normal cracks that are thought to have occurred in the surface layer of the veneer are relatively deep.

Honjo 4 Heat resistant 7a made of plywood laminated with veneer and processed with WPC
A1 Note 5 General 707 made by laminating veneer on plywood - As is clear from this table, the decorative wooden veneer obtained by the present invention is superior in terms of adhesiveness, heat resistance, appearance, and cost. .

[Effects of the Invention] As described above, the present invention applies adhesive to a thin piece of wood and press-forms it into blocks to form a flitch, and then slices this flitch, so that the quality of the wood is not damaged by the thin piece of wood. Moreover, it is possible to create a decorative wood veneer with an appearance suitable for modern living spaces, and because it uses a high elongation adhesive to integrate the wood veneers, it reduces thermal stress. It is heat resistant and can be absorbed and not cracked.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing the manufacturing process of an embodiment of the present invention, P
Figure rrJ2 is an enlarged perspective view of the same wood flake as above, and Figure 3 (a
) (b) is an explanatory diagram showing the state in which a normal piece of wood is pressed, f
jIJ4 Figure (,) (b) is an explanatory diagram of the state in which the wood flakes of the present invention are compressed, Figure 5 (,) (b) is a perspective view illustrating the compression of the wood flakes, and Figure 6 (,) ( b) is a perspective view illustrating the appearance of the same as above, in which 1 is a thin piece of wood, 3 is a flitch,
5 is a decorative wood veneer. Agent Patent Attorney Ishi 1) Chief 7 If Sei 1 Sashirai Furu ■ Fig. 2 Fig. 3 (0) (b) Part 4 (0) (b) Fig. 5 (0) (b) (a) (b) Procedural amendment (voluntary) May 14, 1986

Claims (1)

[Claims] [1] A method for manufacturing decorative wood veneer, which comprises applying a flexible adhesive with a high elongation rate to a thin piece of wood, forming a block by pressure molding to form a flitch, and slicing the flitch. .