JP2725457B2 - Building boards and their manufacturing methods - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a building board mainly used as flooring.

[0002]

2. Description of the Related Art Conventionally, as a building board of this kind, FIG.
As shown in the above, raw wood such as Lauan wood and Kapol wood is sliced to make wood veneers (a), (b), and so on. Five layers are laminated alternately with the fiber directions orthogonal to each other, and a medium-density fiberboard (c) is adhered to one surface of the wood substrate (b) bonded with an adhesive. ) Is cut into a predetermined size and bonded to a thin wooden veneer (d) prepared by slicing raw wood such as rawan or kapol wood on the upper surface.

[0003]

However, in the above-mentioned conventional technology, when the surface of the building board is wetted by splashed water or the like when used on the floor of a kitchen, a dressing room, or the like, it is difficult to use wood. There has been a problem that the medium-density fiberboard (c) causes delamination, expansion, and the like due to water, moisture, and the like penetrated from the thin veneer (d).

[0004] The present invention has been invented in order to solve the above-mentioned problems of the prior art. That is, the problem is to provide a building board having good water resistance.

[0005]

Means for Solving the Problems The building board of the present invention solves the above-mentioned problem, and the present invention according to claim 1 comprises attaching a medium-density fiberboard to the surface of a wooden base material, In a building board formed by sticking a thin wooden veneer to the surface of the medium-density fiberboard, wood fibers are hot-pressed as the medium-density fiberboard and have a specific gravity of 0.4 to 0.8 and a thickness of 1. 0mm to 3.0m
m , and the medium density fiberboard is impregnated with a resin.

According to a second aspect of the present invention, a wood fiber is hot-pressed to a specific gravity of 0.4 to 0.8 and a thickness of 1.0 mm.
A medium-density fiberboard having a thickness in the range of 1 to 3.0 mm is prepared, impregnated with the same medium-density fiber resin, and attached to the surface of the wooden base material. Is a method for manufacturing an architectural board.

Here, the wood base material is made of wood veneer, wood plywood or the like.

[0008]

The construction board of the present invention has the above configuration,
Even if moisture permeates from a thin wooden veneer, the resin is impregnated into the medium density fiberboard, so that no water penetrates into the medium density fiberboard, so it has good water resistance, and delamination and expansion occur. Hard to do.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the embodiments shown in the drawings.

The building board shown in FIG. 1 is an embodiment of the present invention according to claim 1, wherein a medium-density fiberboard (MDF) 2 is adhered to the surface of a wooden base material 1, and the medium-density fiberboard (MDF) A building board formed by sticking a thin wooden veneer 3 to the surface of an MDF (MDF) 2 is characterized in that a medium density fiberboard (MDF) 2 is impregnated with a resin.

The wood substrate 1 is obtained by slicing raw wood such as lauan wood or kapole wood into a thickness of about 1 mm to 3 mm, and cutting the wood veneers so that the fiber directions of the wood veneers are alternately orthogonal to each other. It is formed in a thickness of about 6.0 mm to 15.0 mm by laminating three layers, five layers, seven layers and the like.

On one surface of the wood substrate 1, a wood fiber such as hardwood or softwood is hot-pressed to a specific gravity of 0.4 to 0.8.
And thickness 1.0mm to 3.0mm density fiberboard in created in a range of (MDF) 2 is stuck with an adhesive. Medium density fiberboard made in such a range
(MDF) 2 has high strength and bending strength of 30 kg / cm ²
It has the performance of the degree or more. In addition, medium density fiberboard (MD
F) 2 is impregnated with an unsaturated polyester resin.

Further, on the surface of the medium density fiberboard (MDF) 2, a thin wooden veneer 3 having a thickness of about 0.25 mm to 3.0 mm is adhered.

In such a building board, when water is present on the surface of the thin wooden veneer 3, even if water permeates into the thin wooden veneer 3, the medium density fiberboard (MDF) Water does not penetrate into the medium density fiberboard (MDF) 2 because of the unsaturated polyester resin impregnated in the medium density fiberboard (MDF) 2, so that delamination, expansion and the like hardly occur.

The method for manufacturing a building board shown in FIGS. 2 and 3 is an embodiment of the present invention according to claim 2 and is a medium-density fiberboard (MDF) 2 in which a resin is impregnated on the surface of a wooden base material 1. After heating, the thin wood veneer 3 is stuck on the surface of the medium density fiberboard (MDF) 2.

The wood substrate 1 is a wood veneer prepared by slicing a raw wood such as a lauan wood or a kapole wood into a thickness of about 1 mm to 3 mm in the same manner as described in the first embodiment. Are laminated in three layers, five layers, seven layers, etc., in such a manner that the fiber directions of the wooden veneers are alternately orthogonal to each other, and the thickness dimension is 6.0.
It is created to be about 1 mm to 15.0 mm.

The medium density fiberboard (MDF) 2 are those prepared by slicing a range of thickness 1.0mm to 3.0 mm, P-852 unsaturated polyester resin
100 parts (manufactured by Nippon Shokubai Co., Ltd.) is immersed in a solution prepared by mixing 5 to 30 parts of a styrene monomer and 2 to 8 parts of benzoyl peroxide (BPO) with a vacuum of 5 m.
mHg / cm ^{2 to} 40 mmHg / cm ² , impregnation time 3
After vacuum impregnation for 0 minutes to 5 hours and wet impregnation of 90% to 150%, it is left in a room at 100 ° C. for 30 minutes to 3 hours to form a semi-cured state.

The thin wooden veneer 3 is formed to have a thickness of about 0.25 mm to 3.0 mm.

Then, a medium-density fiberboard (MDF) 2 impregnated with an unsaturated polyester resin is placed on the surface of the wooden base material 1 and is bonded by heating with an aqueous vinyl urethane adhesive. Further, a thin wooden veneer 3 is adhered to the surface of the medium density fiberboard (MDF) 2 with an adhesive to produce a building board.

In the above-described embodiment, the medium-density fiberboard (MDF) 2 is impregnated with resin by vacuum impregnation.
The medium density fiberboard (MDF) 2 may be impregnated with resin by vacuum pressure impregnation.

In the above embodiment, the wood substrate 1 and the medium-density fiberboard (MDF) 2 are bonded by heating with an aqueous vinyl urethane adhesive.
May be bonded by heating with an unsaturated polyester resin impregnated in the resin.

[0022]

As described above, according to the first aspect of the present invention,
Construction board and a building obtained by the manufacturing method according to claim 2.
In the board, the medium-density fiberboard is impregnated with resin, so even if water permeates the thin wood veneer, water does not penetrate into the medium-density fiberboard. This has the effect that hardly occurs. In addition, high strength and relatively thick
Because the medium-density fiberboard is impregnated with resin,
Even if impact or load is applied to the plate, the medium-density fiber
It has a high surface hardness that can be received by
And the medium-density fiberboard is relatively thick
Also, the resin impregnation causes delamination, expansion, etc.
This is effective in preventing the occurrence of warpage .

[Brief description of the drawings]

FIG. 1 is a sectional view of a building board according to one embodiment of the present invention.

FIG. 2 is a perspective view showing a laminated state of the present invention described in claim 2;

FIG. 3 is an overall perspective view of the present invention described in claim 2;

FIG. 4 is a perspective view of a conventional construction board.

[Explanation of symbols]

 Reference Signs List 1 wood base material 2 medium density fiberboard 3 wood thin veneer

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code Agency reference number FI Technical display location B32B 21/02 B32B 21/02 E04F 15/04 601 0231-2E E04F 15/04 601Z

Claims (2)

(57) [Claims] 1. A building board comprising a medium-density fiberboard adhered to a surface of a wooden base material and a thin wood veneer adhered to the surface of the medium-density fiberboard, wherein a wood fiber is used as the medium-density fiberboard. Is hot-pressed to a specific gravity of 0.4 to 0.8 and a thickness of 1.0 mm
An architectural board characterized in that the medium-density fiberboard is impregnated with a resin, using a sheet made in a range of from 3.0 mm to 3.0 mm. 2. A wood fiber is hot-pressed to have a specific gravity of 0.4 to 0.8 and a thickness of 1.0 mm to 3.0 mm .
A medium-density fiberboard is prepared, impregnated with the same medium-density fiber resin, attached to the surface of the wooden base material, and then laminated with a thin wooden veneer on the surface of the medium-density fiberboard. The manufacturing method of building boards.