JPH0752103A - Plywood for flooring base plate - Google Patents

Abstract

PURPOSE:To provide a plywood for the base board of flooring, capable of preventing the infiltration of moisture into a wooden layer and improving the durability of the plywood. CONSTITUTION:A plywood 1 for the base board of flooring is provided with a phenol resin impregnated paper 3, high in resistance to invasion of water, on the side of the surface 21 of the wooden plywood 2 of needle-leaved tree. On the other hand, a phenol resin impregnated paper 5, high in resistance to invasion of moisture, is provided at the side of rear surface 22 of the wooden plywood 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plywood for flooring base plate, and more particularly to a laminated structure for improving its durability.

[0002]

2. Description of the Related Art Among the interior materials in the room, wood veneer or floor plywood is made of wood veneer or wood plywood. In some cases, a coating film is provided to prevent water spilled on the floor from seeping inside. However, since the wood veneer or the wood plywood is exposed on the back surface side of the conventional plywood for flooring base plate, there is a problem that moisture permeates from the back surface side and the flooring is easily pained.

In view of the above problems, the object of the present invention is to
An object of the present invention is to provide a plywood for a flooring base plate, which is capable of improving the durability by improving the laminated structure of the flooring material to prevent the penetration of water into the wood layer.

[0004]

In order to solve the above-mentioned problems, in the plywood for flooring base plate according to the present invention,
It is characterized in that resin-impregnated paper such as phenolic resin-impregnated paper is stuck on both sides of a wood board such as plywood of conifer or hardwood.

[0005]

In the plywood for flooring base plate according to the present invention, resin-impregnated paper such as phenol-based resin-impregnated paper is stuck on both sides of the wooden board, so that water can be absorbed from both the front side and the back side. Since it does not penetrate, it has high durability.

[0006] Further, when a softwood or the like is used for the wood board, it has high strength, but on the other hand, there are many cracks such as a surface, and there are many tars on the surface.
In the present invention, since the resin-impregnated paper is pasted on both sides of the wooden board, the unevenness due to the cover and the cracks on the surface of the plywood are absorbed by the resin-impregnated paper and are not reflected on the surface, and the tar does not appear on the surface. Therefore, the plywood for flooring base plate according to the present invention has good appearance and high strength.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a plywood for flooring base plate according to an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a sectional view showing the construction of a plywood for flooring base plate of this example.

In the figure, a plywood 1 for a flooring base plate of the present example is a wood-based plywood 2 (wood board) consisting of a plurality of veneers.
Is pasted. In this example, a plywood of strong coniferous wood is used as the wood plywood 2.

On the other hand, in the plywood 1 for flooring base plate, a phenolic resin-impregnated paper 5 having high water resistance is also attached to the back surface 22 side of the wooden plywood 2.

These phenolic resin-impregnated papers 3, 5
Is obtained by impregnating a thick paper with phenol varnish and then drying it to remove the solvent component. Here, the phenol-based resin-impregnated paper 3 and the wood-based plywood 2 are hot-pressed with the phenol-based resin-impregnated paper 3 superposed on the surface 21 side of the wood-based plywood 2 via the adhesive layer 31. They are bonded together by pressure bonding under high pressure conditions. Similarly, the phenolic resin-impregnated paper 5 is also pressure-bonded under high temperature and high pressure conditions using a hot press in a state where the phenolic resin-impregnated paper 5 is superposed on the back surface 22 side of the wooden plywood 2 via the adhesive layer 51. It is pasted together. In addition, the adhesive layers 31 and 51 may be provided on either side of the front surface 21 and the back surface 22 of the wooden plywood 2, and the phenolic resin-impregnated papers 3 and 5 may be bonded together.

The plywood 1 for flooring base plate having the above-mentioned structure is laid on the front surface side with a veneer or the like bonded via an adhesive layer, and the side with the veneer bonded is faced to the room. And make up the floor.

Since the flooring base plate plywood 1 has the phenolic resin-impregnated paper 3 on the surface 21 of the wooden plywood 2, it does not soak into the interior of the wooden plywood 2 even when water or the like is spilled. Further, even if the wood plywood 2 has unevenness due to a bead or the like, the unevenness is smoothed by the phenolic resin-impregnated paper 3. In addition, the tars of the wooden plywood 2 are not blocked by the phenolic resin-impregnated paper 3 and do not float up to the surface of the plywood 1 for the flooring base plate. Therefore, the treatment for smoothing the surface of the wood plywood 2 and the treatment for the tar are not necessary. Therefore,
While maximizing the strength of the softwood plywood used for the wooden plywood 2, it is possible to inexpensively manufacture the plywood 1 for the flooring base plate that makes use of the grain pattern of the laminated veneer.

Further, since the flooring base plate plywood 1 also has a highly water-resistant phenolic resin-impregnated paper 5 on the back surface side (the back surface 22 side of the wood-based plywood 2), water is immersed from the back surface 22 side. There is nothing to see in. Therefore, the durability of the plywood 1 for flooring base plate is high.

In this example, as the resin-impregnated paper stuck to the plywood 1 for flooring base plate, the phenol-based resin-impregnated paper 3,
However, the resin impregnated paper impregnated with another type of resin may be used as long as the resin has high water resistance.

[0016]

As described above, in the plywood for flooring base plate according to the present invention, since resin-impregnated paper such as phenol-based resin-impregnated paper is pasted on both sides of the wooden board, it does not matter whether it is on the front surface side or the back surface side. Water does not seep in from the side, so it has high durability. In addition, when coniferous wood is used as the wood board, it has a high strength, but there is also a drawback that there are many weds and tars on the surface, but since resin-impregnated paper is pasted on both sides of the wood board, wed and tars. Since the drawbacks caused by the above can be solved, it is possible to inexpensively manufacture a plywood for a flooring base plate that has a good appearance and high strength.

[Brief description of drawings]

FIG. 1 is a sectional view of a plywood for flooring base plate according to an embodiment of the present invention.

[Explanation of symbols]

 1 ... Plywood for flooring base plate 2 ... Wood plywood (wood board) 3 ... Phenolic resin impregnated paper (resin impregnated paper) 5 ... Phenol resin impregnated paper (resin impregnated paper) 21 ...・ Front side 22 ... Back side

Claims (3)

[Claims] 1. A plywood for flooring base plate, characterized in that resin-impregnated paper is pasted on both sides of a wooden board. 2. The resin-impregnated paper according to claim 1,
A plywood for a flooring base plate, which is a paper impregnated with a phenolic resin. 3. The plywood for a flooring base plate according to claim 1, wherein the wood board is a plywood of coniferous wood.