JPS606234B2 - Manufacturing method of three-dimensional artificial wood grain decorative board - Google Patents

Description

[Detailed Description of the Invention] Conventional artificial wood grain decorative veneers are made by stacking raw material veneers vertically between a pair of mold slopes with an adhesive between them to form a flitch, so that the adhesive layer of the flitch has a wood grain pattern. Since the wood is manufactured by scraping, changes in the wood grain pattern are determined by the color of the raw veneer, the color of the coloring agent added to the adhesive, and even the uneven shape of the template.

Also, when the manufactured decorative veneer is applied to a substrate such as plywood and then top-coated, the coating film is formed relatively uniformly, resulting in a smooth decorative surface, but with little change in appearance. In other words, the gloss of the paint film applied along the wood grain pattern was more matte than other parts, as with natural signature veneer, and it was not possible to create an open-pore finish that would create recesses. Therefore, in the present invention, we have investigated methods for reproducing them, and have completed the method of the present invention. That is, in the present invention, raw veneers are laminated and bonded between a pair of mold slopes using an adhesive to form a flitch, the flitch is peeled off so that the adhesive layer has a wood grain pattern, and then the flitch is made into a rough veneer. After the decorative veneer is pasted on a regular substrate, a reaction-curing synthetic resin paint is applied to the top surface of the artificial thick Ichisho board. A veneer impregnated in advance with a substance that retards the curing of resin paints and a regular veneer are combined as required as raw veneers and laminated and bonded to form a flitch.An artificial material with unevenness that matches the wood grain pattern. The most distinctive feature of the manufacturing method for wood-grained veneers is that the veneer is pre-impregnated with a substance that retards the curing of the reaction-curing synthetic resin paint applied to the top surface. When a veneer is used and a paint is overcoated, the coating layer in the area containing the substance hardens more slowly than the coating layer in other areas, resulting in depressions in the area.

The present invention will be explained in detail below.

The raw material veneer used in the present invention does not have the usual wood grain pattern, or has a thickness of 0, such as agathis or lauan, which is hardly noticeable.
．． It is a veneer on the 2 to 2.0 side.

Next, necessary ones of the veneers are impregnated in advance with a substance that delays the curing of the synthetic resin paint that will be applied to the upper surface in a later step. Substances that retard the curing of the synthetic resin paint applied to the top surface include, if the synthetic resin paint is a two-component urethane resin paint created by a reaction between polyol and isocyanate, substances that easily react with the isocyanate, which is the curing agent of the urethane resin paint; For example, polyethylene glycol, polypropylene glycol, polyvinyl alcohol, etc. are used.

The molecular weight of polyethylene glycol etc. is 1000-100
Any value within the range of 00 is sufficient. If the synthetic resin paint is an acid-curing amino alkyd resin paint, use ammonia, ammonium carbonate, or Mono-Q di. Use alkaline substances such as trimethylamine, ethyldiamine, and aniline. In addition, as a method for impregnating the raw material veneer with the above substances, a commonly used vacuum pressure impregnation pot or impregnation tank may be used, and the impregnation may be carried out simultaneously with the dye solution, etc., or it may be impregnated in a separate process. The raw material veneer 1 produced as described above is combined with the raw material veneer 2 which is not impregnated with the above-mentioned substance until the moisture content is about 15% or less, as shown in FIG. Create a flitch by gluing the layers together using adhesive.

As the adhesive, room-temperature curing synthetic resin adhesives such as commonly used wood adhesives such as Urya resin and vinyl acetate resin are preferred. Next, use a slicer or the like to slice the adhesive layer of the Danflitch to a thickness of 0.2 to 2.5 mm so that it has a wood grain pattern. Peel it off to the extent of a ridge to obtain an artificial wood grain decorative veneer. Next, the artificial wood grain decorative board is attached to the surface of a commonly used substrate such as plywood, particle board, hardboard, asbestos slate, or metal plate. Next, a reaction-curing synthetic resin paint is applied to the surface of the artificial wood grain decorative veneer, the curing of which is delayed by a substance previously impregnated with the raw material veneer, and dried to harden the paint. The amount of paint to be applied is about 50 to 200 coats/meter. At this time, the reaction-curing synthetic resin paint 5 applied to the upper surface of the artificial wood grain decorative veneer is applied to the raw material veneer 2 which does not contain any substance that retards the curing of the paint, whereas the part on the raw material veneer 1 that is impregnated with the retarding substance is The coating film on the raw material veneer 1 impregnated with the retardant material is pulled around the periphery to form a recess 6 as shown in FIG. 2, and is cured in due course.

In this case, at the bottom of the recess formed, the coating surface becomes rough due to the channel grooves and minute irregularities 7 of the veneer, and becomes more matte than other parts, making it difficult to create a three-dimensional surface as a decorative board. The feeling is even more emphasized. As an embodiment of the present invention, it is also possible to impregnate raw material veneer with an alkaline substance and apply an acid-curable amino alkyd resin paint to the upper surface of the raw material veneer, but the raw material veneer impregnated with an alkali substance may be coated on the upper surface. This is not very desirable in terms of work because it delays the curing of not only the paint used to make the flitch, but also the urea-based adhesive used to make the flitch.

On the other hand, when the raw material veneer is impregnated with polyethylene glycol or the like and a two-component urethane resin paint is used by reacting polyol and isocyanate, there is no delay in curing of the adhesive used to create the fritches, and the raw material veneer is impregnated with polyethylene glycol or the like. It also improves the dyeability and adhesion of the plate, making it practically preferable. Examples of the present invention will be described below. Example 1 A Ramin veneer with a thickness of 0.8 cm was impregnated with a commonly used dye solution and then dried to obtain a tan veneer with a water content of about 10%.

On the other hand, 2 times polyethylene glycol with a molecular weight of 4000 was added to a 0.4-thick willow white lauan veneer using a commonly used dye solution.
After impregnation under reduced pressure with a solution in which parts by weight of . Then the above 2
Approximately 30 pieces of veneer were alternately laminated between a pair of complementary templates using brown-colored urea adhesive, and then rolled down for one hour at a pressure of 20 k9/s. A flitch with the desired uneven shape was obtained.

Next, after sawing so that the adhesive layer of the flitch had the desired wood grain pattern, it was peeled off to a thickness of 0.4 mm using a slicer to obtain an artificial wood grain decorative veneer with a zelkova grain pattern. Then, the decorative veneer was hot-press bonded to the plywood surface using a urea monovinyl acetate resin mixed adhesive. Then, after sanding the surface of the decorative veneer to make it smooth, 80 coats of a urethane resin-based transparent paint containing 3 parts by weight of isocyanate as a curing agent were applied to 10 parts by weight of the base resin containing PoIJol. , 50-600
After drying at 0 for 30 minutes, an artificial wood-grained IQ salmon board with a three-dimensional zelkova pattern in which the portion corresponding to the desired autumn wood portion was recessed was obtained. Example 2 1 part by weight of a 20% butylamine aqueous solution was added to the dye solution to the white lauan veneer with a thickness of 0.4 in Example 1 along with a commonly used dye solution, and an acid-curing aminoalkyd based paint was used. Using resin paint, we obtained an artificial wood grain decorative board with a three-dimensional zelkova pattern in which the area corresponding to the desired autumn wood area was recessed.

[Brief explanation of the drawing]

1... Raw material veneer impregnated with a substance that retards the curing of reaction-curing synthetic resin paint, 2... Commonly used raw material veneer, 3, 4... A pair of molds. Plate, 5...reaction curing synthetic resin paint, 6... recess. FIG. 1 is an explanatory diagram of manufacturing a flitch by the method of the present invention. FIG. 2 is a sectional view showing the relationship between the decorative veneer obtained by the method of the present invention and the paint applied to the top surface. Figure 1 Figure 2

Claims (1)

[Scope of Claims] 1 Raw veneers are layered and bonded between a pair of templates using an adhesive to form a frit, and the frit is peeled off so that the adhesive layer forms a wood grain pattern to form a decorative veneer. In a method for producing an artificial wood grain decorative board, the decorative veneer is then adhered to a commonly used substrate, and then a reaction-curing synthetic resin paint is applied to the top surface of the decorative veneer. An artificial wood grain decorative board having irregularities that match the wood grain pattern, characterized by laminating and adhering a raw material veneer pre-impregnated with a substance that retards the hardening of wood and a commonly used raw material veneer to form a fritsch. Production method. 2. Claim 1, characterized in that the reaction-curing synthetic resin paint is a urethane resin paint that is cured by the reaction of isocyanate and polyol, and the substance that retards the curing of the urethane resin paint is polyethylene glycols. The method for manufacturing the artificial wood grain decorative board described above.