JPH0614343U - Floor material - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent warpage in floor materials, especially heat-resistant floor materials. [Structure] A floor material in which a decorative thin veneer 2 is adhered and laminated on the surface of a cross plywood 1 and a cut groove 3 is formed on the back surface side of the cross plywood 1. Face veneer 1 on the surface of cross plywood 1
The thickness of a is made sufficiently smaller than the thickness of the other veneer 1b of the cross plywood 1.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a technique for preventing warpage in a floor material, particularly a heat resistant floor material.

[0002]

[Prior art]

 BACKGROUND 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 cut groove is formed on the back surface side of the cross plywood. As this floor material, as shown in FIG. 2, there is known a floor material for direct bonding in which a decorative thin veneer 2 is bonded and laminated on the surface of a 5-ply or 7-ply cross 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 the 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]

[Problems to be solved by the device]

 However, if the water-soluble adhesive is applied on the cross plywood 1 and the decorative thin veneer 2 is placed on it and set, the water of the water-soluble adhesive is absorbed by the decorative thin veneer 1 and the decorative thin veneer 1 is removed. When expanded (expanded) and pressed as it is, water also evaporates in the heat-dissipated state after pressing, and the force of contracting to the original dimension acts, causing a problem that the whole warps as shown in FIG. If the kerfs 3 are formed on the back side of the cross plywood 1 to deal with the unevenness, there is a problem that the warp is more likely to occur as shown in FIG.

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

[0005]

[Means for Solving the Problems]

 The flooring material of the present invention is a flooring material in which a decorative thin veneer 2 is adhered and laminated on the surface of a cross plywood 1 and a cut groove 3 is formed on the back side of the cross plywood 1. It is characterized in that the thickness of the face veneer 1a of the surface is made sufficiently thinner than the thickness of the other veneer 1b of the cross plywood 1.

[0006]

[Action]

 The decorative thin veneer 2 tends to warp due to the adhesion and lamination, but by making the thickness of the face veneer 1a of the cross plywood sufficiently thinner than the thickness of the other veneer 1b of the cross plywood 1, Prevent warpage. The warp can be prevented simply by improving the thickness of the face single plate 1a.

[0007]

【Example】

 Hereinafter, the present invention will be described 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 cross each other, and 5 ply or 7 ply is used. A thin laminated veneer 2 is adhered and laminated on the front side of the cross plywood 1. Here, the decorative thin veneer 2 having a thickness of 0.25 mm is used, and the cross plywood 1 having a thickness of 9 mm is used. A large number of cut grooves 3 are formed on the back surface 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 1b as shown in FIG. There is. The decorative thin veneer 2 is crossed so that the fiber direction thereof is substantially orthogonal to the fiber direction of the face veneer 1a of the surface layer of the cross plywood 1 to enhance crack resistance.

The thickness of the face veneer 1a on the surface layer of the cross plywood 1 and the other veneer 1b is normally 1.2 mm (thickness at the plywood maker). In the case of use, a warp occurs when the thin laminated veneer 2 is adhered and laminated on the cross plywood 1, but in the present invention, in order to suppress such warp, the face veneer 1a has no warp. The thickness of the face single plate 1a is reduced to 0.5 mm or less by performing sanding of 7 mm or more. Then, when the decorative thin veneer 2 is adhered and laminated on the surface of the cross plywood 1, warping is likely to occur due to the influence of the decorative thin veneer 2 as in the conventional case. By making the thickness sufficiently smaller than the thickness of the other veneer 1b of the cross plywood 1, that is, by setting it to 0.5 mm or less, a warp is caused by bonding the decorative thin veneer 2 to the cross plywood 1. It is possible to prevent the above from happening and to make the floor material as a whole without warpage. In the present invention, the grooving 3 is provided on the back surface side of the cross plywood 1 so that the flooring material as a whole has a "flexible" flexibility and can cope with the unevenness of the construction base such as the concrete slab. To do so.

In the floor material manufacturing process, first, the face veneer 1a of the cross plywood 1 is sanded to be sufficiently thinner than the other veneer 1b of the cross plywood 1, and then The decorative thin veneer 2 is adhered with an adhesive and hot pressed, then the surface of the face veneer 1a is sanded with # 180 and # 240, and then the process of Ex. 4 is performed. After coloring and painting, the product is divided into small pieces and molded to produce a product.

The flooring material having the above-mentioned structure has various uses, such as a case where it is directly pasted on a concrete slab or a case where it is pasted on a heating panel, but it is not particularly limited. Absent. 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.

Then, in the cross plywood 1, if the thickness of the back veneer 1c on the back surface is made thinner than the thickness of the face veneer 1a, the decorative thin veneers 2 are bonded and laminated, further suppressing warpage. Is what you can do.

[0012]

[Effect of device]

 In the present invention, as described above, the thickness of the face veneer on the surface of the cross plywood is made sufficiently thinner than the thickness of the other veneer of the cross plywood. If the thickness of the face veneer of the cross plywood is made sufficiently thinner than the thickness of the other veneer of the cross plywood, the warp can be prevented and the warp can be prevented from warping. A simple improvement by thinning the plate is good.

[Brief description of drawings]

1 is a cross-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 1a Face veneer 2 Decorative thin veneer 3 Cut groove

Claims (1)

[Scope of utility model registration request] 1. A flooring material in which a decorative thin veneer is laminated on the surface of a cross plywood and a cut groove is formed on the back side of the cross plywood, and the thickness of the face veneer on the surface of the cross plywood is A flooring material characterized by being made sufficiently thinner than the thickness of other veneer of cross plywood.