JPS627543A - Manufacture of thrust-board stuck decorative board impregnated with resin - 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] [Field of Industrial Application] This invention is a method for manufacturing a decorative board pasted with resin-impregnated veneer, in which the channel groove portion of the veneer is colored darker than the flat part of the veneer to emphasize the woody feel of the veneer. Regarding.

[Conventional technology] Conventionally, in decorative boards to which veneers made from very thinly cut natural wood are pasted, one method of clarifying the channel grooves of the veneers and emphasizing the wood texture is to add a dark color to the surface of the veneers. A common method is to rub the colorant or paint into the concave portions of the channel grooves of the dial plate after applying it, and then remove the paint from the flat areas by scratching (commonly known as wiping).

[Problems to be solved by the invention] The above-mentioned wiping process is also used in WPC, which is made by impregnating synthetic resin into the veneer and then curing it, but because it involves applying a dark coloring agent or paint to the entire surface of the veneer, Even if you scrape it off afterwards, it is practically impossible to completely remove the colorant or paint from the flat areas due to uneven thickness of the veneer or suction, and the entire surface of the veneer may become dark or remain partially. It had drawbacks such as a mottled surface.

Therefore, in view of the above-mentioned drawbacks of the wiping process, it is an object of the present invention to provide a method for manufacturing a veneer-attached decorative board that exhibits the same effect without performing a wiping process on the veneer impregnated with a synthetic resin.

[Means for Solving the Problems] In other words, the present invention involves obtaining a veneer by thinning the veneer to a thickness such that the average channel grooves of each hardwood appear as through holes, and then applying a heat polymerization mold to the veneer. Impregnated with transparent synthetic resin,
Next, the synthetic resin in the veneer is heated and pressed to flow and harden to form a uniform resin layer even in the through holes to obtain a resin-impregnated veneer, and then an adhesive colored in the desired pipe color is applied. The present invention relates to a method for manufacturing a decorative board, in which the resin-impregnated veneer is laminated and bonded onto a coated substrate, and then a transparent top coat is applied.

Hereinafter, the present invention will be explained in more detail with reference to the drawings which are examples.

The drawing shows a cross-sectional view of a decorative laminate made according to the invention.

The veneer (1) used in this invention is a veneer made by thinly cutting a hardwood tree with a relatively large diameter channel groove, such as oak, Japanese oak, chestnut, elm, or mulberry, using a slicer, and its thickness varies. The thickness is such that the average vessel grooves characteristic of the tree species appear as through holes.

For example, in the case of oak, sen, etc., the diameter of the vessel groove is 300 mm.
Since it exceeds the final layer, the appropriate thickness of the veneer is about 0.3 mm.

Next, the veneer (1) is impregnated with a transparent heat-polymerizable synthetic resin. As the synthetic resin, polyester resins, acrylic resins, etc., which have been conventionally used in WPC, are suitable.

The impregnation conditions are as follows: The veneer (1) is sealed in a container that can be decompressed and pressurized, the pressure is reduced to about 10 mmHg for about 1 to 3 hours, and then the synthetic resin liquid is injected and it is heated at lO to 50 Kg/crn' for about 1 to 5 hours. Pressure treatment.

After the impregnation treatment, the veneer (1) is taken out from the container and the synthetic resin liquid is drained, and the synthetic resin is
Adjust so that the impregnation is about 50 to 200% by weight.

Next, the above-mentioned resin-impregnated veneer is hot-press molded to fluidize and harden the synthetic resin to form a uniform synthetic resin layer. At this time, the synthetic resin layer is also formed in the shape of a bridge at the through-hole portion of the veneer (1), and the back surface of the veneer can be seen through the transparent resin layer (2) at the through-hole portion.

The hot pressure molding conditions were as follows:
0 to 150°C, 5 to 10 Kg/crn', and about 5 to 10 minutes.

Next, the WPC-treated veneer (1) is placed on a commonly used substrate (4) such as plywood or particle board coated with an adhesive (3) colored in the desired veneer's channel groove color, and bonded by heat and pressure. .

The adhesive (3) is a commonly used adhesive such as urethane resin or epoxy resin to which a coloring agent such as blackish brown or brownish color is added.

The adhesion conditions for the veneer (1) to the substrate (4) include a hot press temperature of 120 to 140°C and a pressure of 5 to IQK.
g/cm' for about 5 to 10 minutes.

Finally, the surface of the veneer (1) attached to the substrate (4) is coated (5) with a transparent synthetic resin paint to finish the surface and obtain the desired decorative board.

The top coat (5) is a commonly used transparent synthetic resin paint such as urethane, aminoalkyd, acrylic, or lacquer.

The purpose of producing decorative laminates through the above process is to prevent color difference when the veneer (1), whose concealment properties have been reduced by impregnating it with a synthetic resin, is attached to the substrate (4), and to Transparent synthetic resin M (2
) to see through the surface of the veneer (1) to see the color of the adhesive (3) applied on the substrate (4), as if the wiping grooves of the veneer (1) were colored darker than the flat surface. This is to make it look like a processed veneer.

[Example]
:, □ Examples are described below, ・
□ Oak log was sliced thin to obtain a 0.4+* intestine veneer with a thickness of 0.4+*.

Next, after drying the veneer and adjusting the moisture content to 5% or less, it was sealed in a resin impregnation device, and after being depressurized at 10 mmHg for 3 hours, a transparent polyester resin was injected to produce 30 kg/kg.
After the pressure was released, the plate was taken out from the container and left to drain the liquid, and the synthetic resin impregnation rate was adjusted to 180% by weight based on the weight of the veneer.

Next, the resin-impregnated veneer was heated and pressed between hot platens of a hot press to harden the resin.

The heat and pressure conditions were a temperature of 140°C and a pressure of 7 Kg/cm'' for 1 hour and 10 minutes.

Next, apply 1 urethane resin adhesive colored brown.
The above-mentioned resin-cured veneer was placed on top of the plywood coated with 20 g/rrI' and bonded by hot pressure.

Thereafter, a transparent top coat made of urethane resin was applied at 50 g/rn' on the upper surface of the veneer and dried to obtain the desired decorative board.

[Effects of the Invention] As described above, the method for manufacturing a decorative laminate of the present invention is to apply a resin-impregnated veneer, which has a transparent synthetic resin layer formed even in the open portions of the veneer such as pipe grooves, through a darkly colored adhesive. Since it is attached onto the substrate, it has the following effects.

1. Since the colored adhesive can be seen through the transparent resin layer portion formed in the through-hole (vessel groove) -F of the veneer, a decorative board with a wiping-like appearance can be obtained.

2. Unlike the conventional wiping process, the colorant is not applied to the surface of the veneer, so a beautiful decorative surface can be obtained without unevenness of the colorant due to the thickness of the veneer or uneven suction.

3. Since the entire surface of the veneer is covered with a synthetic resin coating, the colored adhesive when bonded to the substrate does not seep onto the surface of the veneer and does not contaminate the decorative surface.

4. The colored adhesive coated on the substrate prevents the synthetic resin-impregnated veneer with reduced hiding power from changing in color.

[Brief explanation of drawings]

The drawing shows a cross-sectional view of a decorative laminate made according to the invention. (riichi veneer (2) - transparent synthetic resin layer (3) -
Colored adhesive (4) One substrate (5) - Top coat

Claims (1)

[Claims] 1. After obtaining a veneer by thinning it to a thickness such that the average vessel grooves of each hardwood appear as through holes, the veneer is impregnated with a heat-polymerized transparent synthetic resin. Then, heat and press the veneer to make the synthetic resin in the veneer flow and harden it to form a uniform resin layer even in the through holes to obtain a resin-impregnated veneer. Next, apply adhesive colored to the desired tube color. A method for manufacturing a decorative board pasted with a resin-impregnated veneer, which comprises stacking and adhering the resin-impregnated veneer on a substrate coated with the resin-impregnated veneer, and then applying a transparent top coat.