JPH1158316A - Decorative plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a decorative plate having little occurrence of warp or lift between adjacent decorative plates even in the case of use for a long period with relatively hard surface. SOLUTION: The decorative plate comprises a decorative material 10 having cross plywood 11 having a front surface side veneer 15 and a rear surface side veneer 19 of fiber orientation perpendicular to a longitudinal direction of the plate, an intermediate specific gravity fiber plate 12 laminated on a front surface side of the plywood, a sliced veneer 13 laminated on the plate 12, and a backing veneer 14 laminated on a rear surface side of the plywood 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a decorative board used for floorboards and wallboards, and more particularly to a scratch-resistant decorative board with a low warpage obtained by laminating a decorative material on the surface of a plywood via a medium density fiberboard.

[0002]

2. Description of the Related Art A decorative board in which a decorative material such as a veneer is directly adhered to the surface of a plywood is known, and is used as an interior material of a building. However, since the veneer constituting the plywood is soft, when it is used as a floor material, there is a problem that the decorative material is dented or broken by a caster or the like. Therefore, a medium density fiberboard (MD) having a relatively hard surface between the plywood and the decorative material
A method of interposing F) has been proposed, and the dent generated when a caster or the like travels has been solved to some extent.

[0003]

However, the medium specific gravity fiberboard has a large dimensional change due to the absorption and release of moisture as compared with plywood. Warpage occurred, and after construction, there was a problem in that a gap was formed between the decorative boards and pushing up occurred.
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a decorative board having a relatively hard surface and less occurrence of warpage or occurrence of push-up between adjacent decorative boards even after long-term use. .

[0004]

According to the present invention, there is provided a semiconductor device comprising:
The decorative veneer described above, the fiber direction of the front side veneer and the back side veneer, a cross plywood orthogonal to the longitudinal direction of the decorative veneer, a medium specific gravity fiberboard affixed to the surface side of the cross plywood and the same. It is provided with a decorative material such as a veneer adhered on the upper side, and a backing veneer adhered on the back side of the cloth plywood.

In the decorative board according to the first aspect, the fiber direction of the front veneer and the back side veneer of the cloth plywood to be used are as follows:
It is used so as to be orthogonal to the longitudinal direction of the decorative board. Therefore, since the bending strength in the transverse direction is large, even if the medium-density fiberboard adhered to the surface side expands and contracts due to moisture absorption and release, it can withstand this, and as a result, the decorative board is warped in the transverse direction. Decrease. In addition, since the backing veneer is adhered to the back surface of the cross plywood, it is balanced with the medium-density fiberboard on the front surface side, so that the warp of the cross plywood can be prevented. Further, since the fiber direction of the backing veneer is parallel to the longitudinal direction of the decorative board, the strength in the longitudinal direction is improved, and the warpage in the longitudinal direction is prevented.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the accompanying drawings to provide an understanding of the present invention. Here, FIG. 1 is a perspective view showing a laminated state of the decorative board according to one embodiment of the present invention, and FIG. 2 is a front view thereof.

As shown in FIGS. 1 and 2, a decorative board 10 according to an embodiment of the present invention comprises a cross plywood 11 serving as a core material.
And a medium-density fiberboard 12 laminated on the surface side of the cross plywood 11 and a veneer 13 which is an example of a decorative material;
1 and a backing veneer 14 laminated on the back side. Hereinafter, these will be described in detail.

The cloth plywood 11 is a plywood using ordinary Rawan material. In this embodiment, the cloth plywood 11 has single layers 15 to 19 made of five layers of Rawan material. The thickness of the veneers 15 and 19 on the front side and the back side is 1.7 mm, the thickness of the veneers 16 and 18 inside the veneer is 3.2 mm, and the thickness of the veneer 17 in the center is 2.5 mm. . The fiber directions of the veneers 15, 19 are orthogonal to the longitudinal direction, that is, in the short direction. The veneers 16, 18 inside the veneers are parallel to the longitudinal direction, and the central veneer 17 is orthogonal to the longitudinal direction. The fiber direction is oriented in the direction of

The medium specific gravity fiberboard 12 is of a melamine type in which a melamine resin adhesive is used as the adhesive, and has a thickness of about 2.5 mm. The decorative material 13 stuck thereon is made of a veneer having a thickness of about 0.3 to 0.5 mm. Note that printed decorative paper may be used. The surface of the decorative material 13 is painted and finished with urethane resin or the like.

The backing veneer 14 to be adhered to the back side of the cross plywood 11 is made of a hard thin material such as oak material. The fiber direction is the same as the longitudinal direction of the cross plywood, thereby improving the bending strength in the longitudinal direction, and further balancing with the medium specific gravity fiberboard 12 attached to the surface side of the cross plywood 11. I have. Therefore, it is possible to use a medium-density fiberboard or the like as the backing veneer 14, but the cost increases.

Since the decorative panel 10 according to the embodiment has the above-described structure, its surface is hard, and therefore, even when the decorative panel 10 is used as a floor material, it is not easily damaged by casters or the like. There is. Furthermore, even if the medium-density fiberboard 12 attached to the surface of the cross plywood 11 absorbs and discharges moisture, the fiber direction of the veneers on the front and back of the cross plywood 11 is oriented in the short direction. It can withstand the expansion and contraction of the medium-density fiberboard 12 with a high strength, and therefore, there is an advantage that even if this decorative board 10 is used as a floor material or a wall material, it does not easily warp or push up.

In this embodiment, such a five-layered cross plywood is used. However, the present invention is applicable to a three-layered or seven-layered cloth plywood, and the thickness of the cloth is also reduced. It is not limited to the embodiment. Furthermore, the present invention is also applied to a case where the fiber direction of the backing veneer 14 is not necessarily parallel to the longitudinal direction of the decorative board 10, for example, when the fiber direction is orthogonal.

[0013]

As is clear from the above description, the decorative board according to claim 1 has the fiber direction of the veneer on the front side and the back side of the cross plywood oriented in the direction orthogonal to the longitudinal direction.
Warpage of the decorative board is reduced. Furthermore, since the backing veneer is also provided on the back side of the cross plywood, the balance with the medium-density fiberboard on the front side is obtained as a whole, and the dimensional stability is improved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a laminated state of a decorative board according to an embodiment of the present invention.

FIG. 2 is a front view of the same.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Decorative board 11 Cross plywood 12 Medium specific gravity fiber board (MDF) 13 Veneer board (decorative material) 14 Backing veneer 15 Veneer 16 Veneer 17 Veneer 18 Veneer 19 Veneer

Claims (1)

[Claims] 1. A cross plywood in which the fiber direction of the front side veneer and the back side veneer is orthogonal to the longitudinal direction of the decorative veneer, a medium-density fiberboard adhered to the front side of the cross plywood, and A decorative material comprising a veneer or the like affixed to a veneer; and a backing veneer affixed to the back side of the cloth plywood.