JPH0633579A - Floor material - Google Patents

Abstract

PURPOSE:To prevent warp of floor material. CONSTITUTION:A decorative thin veneer 2 is stuck on the surface of a cross plywood 1 and laminated. A kerf 3 is formed on the back side of the cross plywood 1. A thin veneer 4 for preventing warp is stuck on the back side of the cross plywood 1. Hereby, warp due to the decorative thin veneer 2 is obstucted by warp in the reverse direction due to the warp preventing thin veneer 4, and hence the whole floor material is prevented from warp.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for preventing warpage in a floor material, particularly a heat resistant floor material.

[0002]

2. Description of the Related Art Conventionally, there is known a flooring material in which a decorative thin veneer is laminated on the surface of a cross plywood and a groove is formed on the back surface side of the cross plywood. This flooring is 5 ply or 7
There is known a flooring material for direct attachment in which a decorative thin veneer 2 is bonded and laminated on the surface of a ply cloth plywood 1. When adhering the decorative thin veneer 2 to the surface of the cross plywood 1, a water-soluble adhesive is applied on the cross plywood 1, and the decorative thin veneer 2 such as Lauan veneer is placed on the cross plywood 1 and heated and pressed. In this case, hot pressing is performed at 110 ° C to 130 ° C.

[0003]

However, when the water-soluble adhesive is applied onto the cross plywood 1 and the decorative thin veneer 2 is placed and set thereon, the water content of the water-soluble adhesive is removed.
Is absorbed and the veneered veneer 1 expands (extends), and when pressed as it is, water also evaporates in the heat radiation state after pressing, so that a force of contracting to the original dimension works and warps as a whole as shown in FIG. There is a problem. If the kerf 3 is formed on the back side of the cross plywood 1 to deal with the unevenness,
There was a problem that it was more likely to warp as shown in FIG.

The present invention has been made in view of the above-mentioned problems of the conventional example, and an object thereof is to provide a flooring material capable of preventing warpage.

[0005]

According to the flooring material of the present invention, a laminated thin veneer 2 is adhered and laminated on the surface of a cross plywood 1, and a kerf 3 is formed on the back side of the cross plywood 1 to form a cross plywood. The present invention is characterized in that a thin single plate 4 for warpage prevention is adhered to the back surface of the first embodiment, and by adopting such a constitution, the problems of the conventional example described above are solved. Has achieved the purpose of.

[0006]

According to the present invention having the above-mentioned structure, however, the thin laminated veneer 2 is adhered to the front surface of the cross plywood 1 and laminated, so that the thin laminated veneer 2 side tends to warp. It is possible to prevent the warp by the warp-preventing thin single plate 4 adhered to the back surface side of the cross plywood 1, and it can be said that the warp-preventing thin single plate 4 is provided. Since both are thin veneers, the flexibility of the flooring material as a whole due to the provision of the kerfs 3 can be prevented.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the embodiments shown in the accompanying drawings. The cross plywood 1 is made by laminating and integrating single plates so that the fiber directions intersect each other, and 5 ply or 7 ply is used. A thin laminated veneer 2 is bonded and laminated on the front side of the cross plywood 1. Here, the decorative thin veneer 2 has a thickness of 0.25 mm, and the cross plywood 1 has a thickness of 9 mm. A large number of cut grooves 3 are formed on the back surface side of the cross plywood 1, and the cut grooves 3 are formed so as to extend from the top of the cross plywood 1 to the second-layer veneer as shown in FIG. . The configuration so far is the same as the configuration of the conventional flooring material, but in the present invention,
In addition to the above-mentioned structure, a characteristic is that a thin veneer 4 for preventing warpage is bonded. As the warp-preventing thin veneer 4, for example, a Lauan veneer having a water content of 0.6 to 1.0 mm (water content of 10 to 15) is used.
%) Is used. When the decorative thin veneer 2 is adhered and laminated on the surface of the cross plywood 1, warping tends to occur due to the effect of the decorative thin veneer 2 as in the past, but the back side of the cross plywood 1 is used for preventing warping. The thin veneer 4 for adhesion is adhered to the cross plywood 1 for the same reason that the veneer warps when the decorative thin veneer 2 is adhered to the cross plywood 1 by adhering the thin veneer 4 By doing so, a force that tends to generate a warp in the opposite direction to the above acts, and a force that causes a warp due to the bonding of the decorative thin veneer 2 and a thin warping prevention film in the opposite direction. The forces that tend to generate warpage due to the bonding of the single plates 4 cancel each other out, and the warpage is forcibly prevented, and the flooring as a whole can be in a state without warpage. In the present invention, the cut groove 3 is provided on the back surface side of the cross plywood 1 so that the floor material as a whole has "flexible" flexibility so as to cope with unevenness of the construction base such as concrete slab. Here, the thin veneer 4 for warpage prevention is provided on the back surface side of the cross plywood 1. However, since the veneer is a thin veneer, the kerf 3 is provided, so that " It is designed so that it does not lose its "hip" flexibility.

The flooring material having the above-mentioned structure has various uses such as when it is directly stuck on a concrete slab or when it is stuck on a heating panel, but it is not particularly limited. However, since the above structure does not cause warpage, there is no problem as a floor material used particularly in a portion affected by heat.

[0009]

According to the present invention, as described above, the decorative thin veneer is laminated on the front surface of the cross plywood, and the cut grooves are formed on the back surface side of the cross plywood so that the back surface side of the cross plywood is formed. Since a thin veneer for preventing warpage is adhered to the surface, it is necessary to prevent warping due to the influence of the decorative veneer side by using a thin veneer for preventing warpage that adheres to the back side of the cross plywood. Moreover, even though the thin veneer for preventing warpage is provided, since the veneer is a thin veneer, the flexibility of the flooring material as a whole due to the provision of the kerf is not impaired.

[Brief description of drawings]

FIG. 1 is a sectional view of a flooring material of the present invention.

FIG. 2 is a cross-sectional view showing a warped state of a conventional floor material.

[Explanation of symbols]

 1 Cross plywood 2 Decorative thin veneer 3 Cut groove 4 Thin veneer for warpage prevention

Claims (1)

[Claims] 1. A laminated thin veneer is adhered and laminated on the surface of the cross plywood, a cut groove is formed on the back side of the cross plywood, and a thin veneer for preventing warpage is adhered to the back side of the cross plywood. A flooring material characterized by being made of.