JP2003025308A - Wood flooring - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wood flooring having an excellent caster resistant property, for which needle-leaved trees can be effectively utilized, and further having a high strength and an excellent insect-proof property. SOLUTION: A wood flooring 4 is formed by laminating a wood fiber board 2 on a substrate 1 and further laminating a sliced veneer 3 on the wood fiber board 2. The substrate 1 is a needle-leaved tree heartwood plywood made by laminating needle-leaved tree heartwood veneers produced by cutting the heartwood of the needle-leaved tree in a thin veneer state crosswise in a direction of the fiber at right angles.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a wooden floor material.

[0002]

2. Description of the Related Art Conventional wooden floor materials are made of hardwood (generally lauan) having a thickness of about 5 to 12 mm. A plate is generally attached and configured.

This conventional wood floor material has a problem that the hardness of the surface of the hardwood plywood is low, the caster resistance is poor, and the surface is dented. In addition, hardwood plywood has a problem of poor insect resistance.

Rawan, which is a raw material for hardwood plywood, is rapidly decreasing due to overcutting. It is said that this rainforest deforestation has caused a decline in tropical rain forests and is a cause of deterioration of the global environment.Currently, raw wood for plywood other than Lauan is used to protect the resources of Lauan wood and the global environment. It is necessary to ask for.

Therefore, it is necessary to continuously select recyclable tree species from the viewpoint of resource protection and global environment protection. As the recyclable tree species, tree species that are regenerated by afforestation are desirable, and the tree species that are being planted are mainly coniferous trees, and the coniferous trees have not been deforested as much as Lauan and can be used as a resource.

[0006]

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above points, and is excellent in caster resistance, can effectively use conifers, and is strong and has excellent insect repellent properties. It is an object to provide a floor material.

[0007]

In order to solve the above-mentioned problems, a wood flooring material according to the present invention is formed by laminating a wood fiberboard 2 on a substrate 1 and a veneer 3 on the wood fiberboard 2. It is a wood floor material 4, and the substrate 1 is made of a softwood core material plywood obtained by laminating a softwood core material veneer obtained by cutting a softwood core material part into a thin veneer shape so that the fiber directions are orthogonal to each other. It is a feature. With such a configuration, M
The wood fiber board 2 such as a medium quality fiber board such as DF can increase the hardness to improve the caster resistance.
Since the substrate 1 is made of a softwood core material plywood obtained by cutting a softwood core material single plate obtained by cutting a softwood core material portion into a thin single plate shape, the hardness of the substrate 1 itself is increased. The caster resistance is further improved. Further, since the substrate 1 is made of a softwood core material plywood obtained by laminating a softwood core material veneer obtained by cutting a softwood core material portion into a thin veneer shape, the softwood core material plywood is laminated. Since the cells are dead, they are hard and strong, and they are excellent in insect repellency, and do not cause insect damage such as flat beetles and are resistant to corrosion.

Further, it is preferable that the plywood of softwood core material, the wood fiber board 2 and the projecting plate 3 are fixed by cold pressing. With such a configuration, it is possible to provide the wooden flooring material 4 of stable quality without causing excessive warping such as hot pressing.

Further, it is preferable that the surface treatment layer 5 consisting of an undercoat and an overcoat is formed on the upper surface of the veneer 3 and the overcoat 5b is formed by ultraviolet curing a mixture of an ultraviolet curable coating material and a fluorine resin. . With such a structure, it is possible to obtain a wood flooring material having excellent surface impact resistance, stain resistance, and light resistance.

Larch is preferably used as the softwood. Since larch has a high core material ratio, a softwood core material veneer can be easily obtained by cutting the core material part of a softwood into a thin veneer. In addition, larch has the characteristics of high specific gravity, high hardness, high strength, and low shrinkage, and is also excellent in corrosion resistance and insect repellency.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below based on the embodiments shown in the accompanying drawings.

In the present invention, the substrate 1 is made of a softwood core material plywood. This softwood core material plywood is made by laminating a softwood core material veneer obtained by cutting a softwood core material portion into a thin veneer so that the fiber directions are orthogonal to each other. Here, when the trunk of the coniferous tree is cut in a direction orthogonal to the longitudinal direction of the trunk, it is possible to visually recognize that there is a sapwood on the outer peripheral portion and a core material on the inner peripheral portion due to different colors. Here, the sapwood is a part where cells are alive and has a conduction function of transporting the water and nutrients sucked up from the roots to the leaves, while the core material is a modified sapwood that causes cell death. It is the part. In the present invention, a softwood core plywood is formed using a softwood core veneer obtained by cutting the core material part of the softwood, which is a cell dead part, into a thin veneer. The core material of softwood has a higher specific gravity than the sapwood, and is characterized by high hardness, high strength, and a low shrinkage ratio, and is also excellent in corrosion resistance and insect resistance. .

Although there are many kinds of softwoods, it is preferable to obtain a softwood core wood veneer using a softwood having a high core ratio. Examples of conifers having a high core material ratio include larch (Northern larch).

The core material of the conifer has the above-mentioned characteristics, but the core material of the conifer has the sapwood changed and the cells dead, so that the node becomes a nodule. Therefore, in the present invention, when forming the substrate 1 by laminating the softwood core material veneers obtained by cutting the core material part of the softwood into a thin veneer shape so that the fiber directions are orthogonal to each other, the side end portion of the board 1 There are no voids in the processed part, and even if there are dead or voids on the front and back surfaces of the substrate 1, there are 3 dead or φ20mm dead voids.
Use those that are within the place, and use the softwood core wood veneer in which the core material part of the softwood is cut into a thin veneer under the condition that it is filled with putty and smoothed for the missing node,
The substrate 1 is formed by laminating the leaf core material single plates satisfying such conditions with the fiber directions orthogonal to each other.

A wood fiber is formed on a substrate 1 made of a softwood core plywood obtained by laminating a softwood core veneer obtained by cutting a softwood core material into a thin veneer having the above-mentioned structure so that the fiber directions are orthogonal to each other. Laminate the boards 2 together with the veneer 3 on the wood fiber board 2.
Are laminated to form a wooden floor material 4.

One embodiment is shown in FIG. 1 and FIG.
A substrate 1 is formed from a 9.0 mm thick softwood core plywood by laminating 5 plies of a softwood core veneer obtained by cutting the core material part of larch into a thin veneer, and this 9.0 mm thick softwood core A wood fiberboard 2 made of MDF (medium fiberboard) having a thickness of 2.7 mm is laminated on a substrate 1 made of a plywood with an aqueous vinylurethane adhesive as an adhesive 7a, and at the same time a wood fiberboard 2 is provided. As the adhesive 7b, a 0.25 mm-thick veneer is laminated via a melamine resin-based adhesive to form a 12 mm-thick wood flooring 4.

Here, it is preferable that the substrate 1 made of plywood of softwood core material, the wood fiberboard 2 and the projecting plate 3 are laminated and fixed by cold pressing.

For example, an example of cold press conditions for laminating and adhering a substrate 1 made of softwood core plywood and a wood fiberboard 2 made of MDF (medium fiberboard) is shown below. 350g / 3 of water-based vinyl urethane adhesive
Inch × 6 inch is applied, and cold pressing is performed under the conditions of pressure: 8 kg / cm ² , pressing time: 40 minutes, and press temperature: normal temperature.

The reason why the layers are laminated by cold pressing without hot pressing is as follows. In other words, hot pressing causes excessive warpage after lamination, but cold pressing suppresses warpage and ensures stable quality. When a water-based vinyl urethane adhesive is used as an adhesive for adhering the substrate 1 made of softwood core plywood and the wooden fiber board 2 made of MDF (medium fiber board), for example, 100 sheets are piled up. As a result, stable quality can be secured even when cold pressing.

The wood flooring 4 having the above-mentioned structure is to be subjected to actual processing such as the actual projection 6 and the concave groove (not shown) into which the actual projection 6 is fitted in the base material 1 portion.

Then, as shown in FIG. 3, a surface treatment layer 5 is formed on the upper surface of the projecting plate 3 on the upper surface of the projecting plate 3 on the upper surface of the wooden floor material 4. This surface treatment layer 5 is an undercoat 5 on the upper surface of the veneer 3.
It is configured by applying a and further applying a top coat 5b. The top coat 5b is a mixture of a fluorine-based resin with an ultraviolet curable paint, and further blended with ethyl acetate and butyl acetate. And has been cured. In this way, the topcoat 5b is formed by UV-curing a mixture of a UV-curable paint and a fluorine-based resin to form a wood flooring 4 having excellent surface impact resistance, stain resistance, and light resistance. Is something that can be done.

[0022]

As described above, the invention according to claim 1 of the present invention is a wood flooring material in which a wood fiber board is laminated on a substrate and a veneer is laminated on the wood fiber board. Since the substrate is made of a softwood core material plywood in which softwood core material single plates obtained by cutting a softwood core material portion into a thin single plate shape are laminated with their fiber directions orthogonal to each other, a medium-quality fiberboard such as MDF It is possible to increase caster resistance by increasing the hardness with a wood fiberboard such as, and also to make the fiber direction of the softwood core material veneer in which the core material of the softwood is cut into a thin veneer. The structure of laminated softwood core plywood can increase the hardness of the substrate itself, and the caster resistance is improved, and the softwood is made by cutting the core material of the softwood into a thin veneer. Needles made by stacking single-layer core materials with the fibers oriented orthogonally By it is constituted by core plywood, since the core portion of the conifer are those dead cells,
It is hard and strong, and has excellent insect repellent properties so that it does not cause insect damage and is resistant to corrosion.

According to the invention of claim 2, in addition to the effect of the invention of claim 1, since the plywood of the softwood core material, the wood fiber board and the veneer are fixed by a cold press, It is possible to provide a wood flooring material of stable quality without causing excessive warping such as hot pressing.

In addition to the effect of the invention according to claim 1 or claim 2, the invention according to claim 3 forms a surface treatment layer comprising an undercoat and an overcoat on the upper surface of the veneer plate, Is formed by UV-curing a mixture of a fluorine-based resin with an ultraviolet-curable coating material, so that a wood flooring material having excellent surface impact resistance, stain resistance, and light resistance can be obtained.

Further, in the invention of claim 4, in addition to the effect of the invention of any one of claims 1 to 3, since larch is used as the softwood, the larch has a core material ratio. It is possible to effectively obtain a single sheet of softwood core material, and since larch has a large specific gravity, high hardness and strength, and a small shrinkage ratio, the caster resistance is further improved and the strength is strong. It is a thing.

[Brief description of drawings]

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

FIG. 2 is an exploded sectional view of the above.

FIG. 3 is a cross-sectional view in which a surface treatment layer is formed on the surface of the above wood floor material.

[Explanation of symbols]

1 substrate 2 wood fiberboard 3 veneer 4 wood flooring 5 Surface treatment layer

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Kiyoyoshi Yamazaki             135 Idogami-cho, Numata City, Gunma Prefecture             Le Building Materials Industry Co., Ltd. (72) Inventor Haruhisa Inagawa             135 Idogami-cho, Numata City, Gunma Prefecture             Le Building Materials Industry Co., Ltd. (72) Inventor Hideki Kanai             135 Idogami-cho, Numata City, Gunma Prefecture             Le Building Materials Industry Co., Ltd. (72) Inventor, Ryo Kurita             135 Idogami-cho, Numata City, Gunma Prefecture             Le Building Materials Industry Co., Ltd. F term (reference) 2B260 AA01 AA12 BA01 BA19 CD03                       DA01 DA20 DC15 EA04

Claims (4)

[Claims] 1. A wood flooring material in which a wood fiberboard is laminated on a substrate and a veneer is laminated on the wood fiberboard, and the substrate is a softwood core obtained by cutting a core material portion of a softwood into a thin single plate shape. A wood flooring material, characterized in that it is made of a softwood core plywood, which is made by laminating wood veneers with their fiber directions orthogonal to each other. 2. The wood flooring material according to claim 1, wherein the softwood plywood plywood, the wood fiber board and the veneer are fixed by cold pressing. 3. A surface treatment layer comprising an undercoat and an overcoat is formed on the upper surface of the veneer, and the overcoat is formed by ultraviolet curing a mixture of an ultraviolet curable paint and a fluorine resin. The wooden flooring material according to claim 1 or 2. 4. The wood flooring material according to claim 1, wherein larch is used as the coniferous tree.