JPH10337713A - Composite material using medium quality fiber plate for surface base material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress generation of warpage due to expansion or contraction of a medium quality fiber plate by forming manu grooves of lateral and longitudinal notches at a bottom of a composite material obtained by laminating the medium quality fiber plates of a surface base material at a rear surface side of the fiber plate. SOLUTION: A main base material 13 is formed of normal plywood, and of South- Sea timber containing broad-leafed tree as a main body, North-leafed timber containing conifer as a main body or a mixture of them. A male protrusion 11 and female recess 12 are formed at both sides of the material 13. Notches 15 of many cuts are formed laterally and longitudinally at the surface base material at a rear surface side of a medium quality fiber plate 14. The plate 14 is connected by separately manufacturing the material 13 and plate 14 formed with the notches 15 at its bottom, connecting them with thermosetting or thermoplastic adhesive, further placing the plate 14 in the case of manufacturing the material 13, pressing the entirety, and laminating it. Since expansion or contraction of the plate 14 of the base material is scarcely transmitted to the material 13 of a lower part, expansion or contraction or warpage of the overall composite material is prevented thereby to prevent lifting at the time of using at a floor plate.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a medium fiberboard (MD)
The present invention relates to a composite material used for floor materials and wall materials using F) as a surface substrate.

[0002]

2. Description of the Related Art Floor materials using a medium fiberboard as a surface base material are widely used from the viewpoint of crack resistance and scratch resistance of a decorative material such as a veneer adhered to the surface. Since the board itself has a large change in expansion and contraction due to the absorption and discharge of moisture, the main base material is composed of plywood with relatively low elasticity, and a composite material using a medium fiberboard as the surface base material is used as a floor material. .

[0003]

However, even in the composite material according to the above-mentioned conventional example, the expansion and contraction of the medium fiberboard on the surface is still large, and the medium fiberboard used for the surface base material is used in the rainy season or when hot carpet is used. When it expands and contracts occasionally, there is a problem that the entire floorboard is warped. Here, if the thickness of the medium fiberboard, which is the surface base material, is reduced, the load applied to the entire floorboard decreases, so that warpage can be suppressed. However, forming the medium fiberboard thinner is a manufacturing problem. Therefore, there is a problem that the final product becomes expensive. The present invention has been made in view of such circumstances, and uses a medium fiber board as a surface substrate, and uses a medium fiber board as a surface substrate in which the occurrence of warpage due to expansion and contraction of the medium fiber board is suppressed. The purpose is to provide materials.

[0004]

According to the present invention, there is provided a semiconductor device comprising:
The composite material using the medium fiber board described in the surface base material, in a composite material in which the medium fiber board is laminated on the surface base material, on the back side of the medium fiber board, a number of grooves are formed. . The composite material using the medium fiberboard according to claim 2 as a surface substrate is claim 1.
In the composite material as described above, the grooves are formed by vertical and horizontal cuts formed in the bottom of the medium fiberboard.

[0005] In the composite material using the medium fiber board as the surface base material, a large number of grooves are formed at the bottom of the medium fiber board. The degree of joining with the main base material is reduced, so that the stretching force of the medium fiber board is not directly transmitted to the lower main base material, but is buffered at the many grooves. Thus, even if the middle fiberboard on the front side expands and contracts, the expansion and contraction load is hardly transmitted to the surface of the lower main base material, so that the warpage of the entire composite material is suppressed. In particular, in the medium fiber board according to the second aspect, since the grooves are formed by vertical and horizontal cuts formed in the bottom of the medium fiber board, simultaneous suppression in the width direction and the length direction is possible. .

[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 cross-sectional view of a composite material using a medium fiber board according to an embodiment of the present invention as a surface substrate, and FIG. 2 is a back view of the medium fiber board used for the composite material. FIG. 3 is a perspective view showing a part of the rear surface side of the medium fiberboard used for the composite material.

As shown in FIG. 1, a composite material (hereinafter, simply referred to as a composite material) 10 using a medium fiberboard as a surface substrate according to an embodiment of the present invention has male and female members 11 on both sides. It has a main substrate 13 on which each of the fruits 12 is formed, and a medium fiber board 14 laminated on the surface side of the main substrate to constitute a surface substrate. Hereinafter, these will be described.

The main substrate 13 may be made of ordinary plywood, and may be made of a southern material mainly composed of hardwood, a northern material mainly composed of softwood, or a mixture thereof. Approximately 12 mm, a male nut 11 and a female nut 12 having a well-known structure are formed on both sides. On the other hand, the thickness of the medium fiber board 14 is 2 to 3 mm (2.5 mm in this embodiment), and a large number of cuts 15 (horizontally and horizontally) on the back side as shown in FIGS. Notches, an example of a large number of grooves) are formed. The width of the cut 15 is about 1 to 2 mm, and the pitch is 2.
It is about 5 to 5 mm. Further, the depth of the cut 15 is about 40 to 50% of the thickness of the medium fiber board 14.

The bonding of the intermediate fiber board 14 is performed by the main base material 13.
And the intermediate fiber board 14 having a cut 15 at the bottom can be separately manufactured and joined with a thermosetting or thermoplastic adhesive. Further, when the main base material 13 is manufactured, It is also possible to put the medium fiber board 14 on the whole and press the whole to laminate.

By forming in this manner, the medium fiberboard 1
4 and the main substrate 13 can be reduced by 10 to 50%, and the elasticity of the intermediate fiber board 14 is also reduced. Since this stretching force is about 1/3 or less as compared with the conventional case where the medium fiberboard 14 is entirely bonded to the main base material 13, the stretching and warping of the composite material 10 itself is also reduced. It is improved to 20% or less.

In the composite material 10 using the medium fiber board according to the embodiment as a surface base material, the cuts are formed by cuts 15 formed vertically and horizontally, but cuts or meshes formed in an obliquely crossing state. Even so, the present invention is applied. Further, a decorative sheet made of a veneer, printing paper, or the like can be attached to the surface of the medium fiber board 14 to further improve the cosmetic properties.

[0012]

According to the first and second aspects of the present invention, the composite material using the medium fiberboard as the surface base material has a lower expansion / contraction of the medium fiberboard as the surface base material, as is apparent from the above description. It is difficult to transmit to the main base material, so even in the rainy season or when using a hot carpet, it is possible to prevent expansion and contraction and warping of the entire composite material using medium fiberboard as the surface base material, Can be prevented from being pushed up when used for

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a composite material using a medium fiberboard as a surface substrate according to one embodiment of the present invention.

FIG. 2 is a back view of a medium fiberboard used for the composite material.

FIG. 3 is a perspective view showing a partial back surface side of a medium fiberboard used for the composite material.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Composite material using medium fiber board as a surface base material 11 Male seed 12 Female seed 13 Main base material 14 Medium fiber board 15 Cut

Claims (2)

[Claims] 1. A composite material in which a medium fiberboard is laminated on a surface substrate, wherein a number of grooves are formed on the back side of the medium fiberboard, and the medium fiberboard is used as the surface substrate. The composite used. 2. The composite material according to claim 1, wherein the groove is formed by a vertical and horizontal cut formed in a bottom portion of the medium fiber board.