JPS63102902A - Manufacture of decorative board - Google Patents

Abstract

(57) [Abstract] 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 decorative laminates used for floorboards and the like.

[Foreground technology]

In the conventional production of decorative boards, raw wood flitches are sliced thinly to obtain decorative wood veneers, and after drying, resin is added to the wood veneers to improve their strength and decay resistance. WPC (wood-plastic combination) treatment is performed by impregnating and curing and drying, and then this is adhered to a base material such as plywood using an adhesive to produce a decorative board.

In the above-mentioned WPC treatment, the conduit of the wood veneer is filled with resin, but since the light-colored spring wood part that makes up the wood grain has higher translucency than the dark-colored summer wood part, a coloring agent is added. When attached to a base material via an adhesive layer, the spring material portion and summer material portion are reversed. That is, as shown in the drawing, when a WPC-treated wood veneer 1 is bonded onto a base material 3 via a colored adhesive 2, the color of the colored adhesive 2 is applied to the surface through the spring wood portion A of the wood veneer 1. As a result, the original summer wood part B becomes a spring wood part in terms of appearance. This makes it possible to obtain a colored decorative board with clear wood grain.

However, in WPC treatment, a wood veneer is impregnated with resin using a vacuum pressure method (a method of reducing pressure and then applying pressure), but the veneer is removed from the heartwood of the wood or has a thickness (for example, a thickness of about 0.5 mm). In some cases (e.g. cases of Ryu or higher), the resin may not be sufficiently impregnated, resulting in insufficient reversal of the wood grain, resulting in a clear and uneven wood grain, which can significantly reduce the product value as a decorative board. There were many.

In addition, since the wood veneer is impregnated with resin, its rigidity is increased, and therefore, when a hangnail or the like occurs in the wood veneer, there is a problem in that the wood veneer suddenly peels off from the base material.

[Purpose of the invention]

An object of the present invention is to provide a method for manufacturing a decorative board in which the wood grain is clearly visible and the rigidity of the wood veneer is reduced.

[Disclosure of the invention]

The method for manufacturing a decorative board of the present invention includes a step of boiling a wood veneer, a step of impregnating the boiled wood veneer with a resin and curing it, and applying the resin-impregnated and hardened wood veneer onto a base material. This process includes a step of bonding the materials together using a colored adhesive.

As described above, according to the present invention, by pre-boiling the wood veneer, impurities contained in the cells and conduits of the wood are extracted and removed, so that the resin is sufficiently impregnated inside the cells and conduits. As a result, the translucency of the spring wood portion increases, and the apparent reversal of the wood grain between the spring wood portion and the summer wood portion is ensured, making it possible to make the wood grain clear. In addition, since the rigidity and strength of the material are reduced by the boiling treatment, even if there are hangnails or the like, the wood veneer is prevented from peeling off from the base material.

The wood veneer is boiled at a temperature of about 90 to 100°C for 30°C.
It is preferable to carry out the boiling treatment for about 10 minutes to 10 hours. If the boiling treatment is insufficient, impurities will not be sufficiently removed from the wood veneer, resulting in non-uniform resin impregnation.

Examples of resins that can be impregnated into wood veneers include prepolymers such as polyester resins, as well as monomers such as styrene and methyl methacrylate; one or more of these can be impregnated into the resin along with an initiator. do. Impregnation and curing of the resin can be carried out according to conventional methods.

Next, the method for manufacturing a decorative board of the present invention will be explained with reference to Examples.

Example: After a wood veneer was boiled and dried, it was impregnated with resin in the same manner as before, cured, and dried, and then a colorant base was attached to the plywood (base material) via an adhesive layer. moreover,
A decorative board was obtained by applying a surface paint to the surface of a wood veneer.

When this decorative board was compared with a decorative board that was not treated by boiling, the clarity of the wood grain due to the apparent reversal of the spring and summer wood areas was much better in the decorative board treated with boiling than in the decorative board that was not treated by boiling. .

This is because when we looked at the cut surface of the decorative board obtained in this example under a microscope, we found that the many conduits within the wood veneer were evenly filled with resin, whereas in the case of conventional decorative boards that were not subjected to boiling treatment. This is due to the fact that out of the many conduits in the #L wood board, there are some that are not filled with resin and remain as voids.

Furthermore, for the decorative board obtained in this example, a cut was made with a knife between the wood veneer and the adhesive layer, and it was examined whether the veneer would peel off. As a result, the veneer peeled off at 51 of the 10 cuts. On the other hand, in the decorative board that was not subjected to boiling treatment, the veneer peeled off at all 10 cuts. In addition, decorative panels are applied to the edge deck and floor.
When finished and constructed, the surface is generally protected with curing tape, but with decorative boards that are not treated with boiling water, the veneer sometimes peels off along with the tape when the tape is removed. No peeling of the veneer was observed in the decorative board.

〔Effect of the invention〕

According to this invention, by pre-boiling the wood veneer, impurities contained in the cells and ducts of the wood veneer are extracted and removed, so that the resin is sufficiently impregnated into the cells and ducts. This ensures that the wood grain in appearance is reversed between the spring wood portion and the summer wood portion, making it possible to make the wood grain clear. In addition, since the rigidity and strength of the material are reduced by the boiling treatment, even if there are hangnails, the wood veneer is prevented from peeling off from the base material.

[Brief explanation of the drawing]

The drawing is an explanatory diagram showing the structure of the decorative board. 1...Wood veneer, 2...Colored adhesive, 3...Base material, A...Spring wood part, B...Summer wood part

Claims (1)

[Claims] A process of boiling a wood veneer, a process of impregnating the boiled wood veneer with a resin and curing it, and a process of bonding the resin-impregnated and hardened wood veneer onto a base material using a colored adhesive. A method for manufacturing a decorative board including.