JPH10159248A - Board for architecture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an excellent impact-resistant property, by sticking a middle density fiber board on both front and rear faces of a synthetic resin sheet to laminate it to form a board for architecture, and heating and curing the synthetic resin sheet as a flexible synthetic resin sheet in which a plasticizer is mixed, before sticking and laminating. SOLUTION: A flexible vinyl chloride resin sheet 1 in which a high specific gravity material such as barium sulfate or the like is heated and cured in the air of about 60 deg.C for 5h or so. And a middle density fiber board 2 that is obtained by combinedly unifying wooden chips with a melamine adhesive is stuck and laminated on both front and rear faces of the flexible vinyl chloride resin sheet 1 to form a board for architecture. Then, the surface of one middle density fiber board 2 of the board for architecture is decorated by applying paint, grinding, sticking a sheet, etc. And the decorated face is turned to the front side and used as an interior material. Accordingly, warping or extending or contractive deformation are hard to generate and hence, an excellent sound- insulation function can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an architectural board which is a wood-based composite laminate in which medium-density fiberboard generally called MDF is attached and laminated.

[0002]

2. Description of the Related Art Conventionally, medium-density fiberboard has been adopted as an architectural board which becomes a wooden composite laminate for interiors such as flooring and wall materials because of its high strength and excellent impact resistance. ing. For example, as shown in FIG. 3, there is known an architectural board formed by sticking and laminating a wooden veneer 3 on the surface of a base material plywood 4 via a medium density fiberboard 5, and the architectural board is a floor. It is used as a material. In this case, the presence of the medium-density fiberboard 5 on the back side of the wooden veneer 3 on the surface results in a flooring material with high surface strength and excellent impact resistance.

[0003]

However, in the above-mentioned prior art, a layer structure which is not symmetrical in the thickness direction of the architectural plate is not obtained, and the base material plywood 4, the medium density fiberboard 5,
There is a problem that warpage and expansion and contraction easily occur due to the migration of moisture between the layers of the wooden veneer 3.

[0004] The present invention has been invented to solve the above-mentioned problems in the prior art. That is, the object of the present invention is to have high strength, excellent impact resistance, and to be less likely to be warped or stretched. An object of the present invention is to provide an architectural plate which is most suitable as an interior material, particularly as a floor material.

[0005]

The architectural board according to the first aspect of the present invention is obtained by laminating a medium-density fiberboard on both sides of a synthetic resin sheet. Therefore, in this case, since the medium-density fiberboard is disposed on both the front and back sides, the strength is secured on both the front and back sides, and the impact resistance is excellent. In addition, the layer structure is symmetrical in the thickness direction, and since the synthetic resin sheet is interposed between the medium-density fiber boards on both sides, transfer of moisture between the medium-density fiber boards is prevented, so that warpage and expansion and contraction occur. Deformation is less likely to occur.

According to a second aspect of the present invention, there is provided the architectural board according to the first aspect, wherein the synthetic resin sheet is made of a soft synthetic resin mixed with a plasticizer and cured by heating before lamination. It is characterized by having been done. Therefore, particularly in this case, the synthetic resin sheet interposed becomes soft, so that the shock resistance of the synthetic resin sheet improves the shock resistance, and the synthetic resin sheet becomes difficult to transmit sound, so that the sound insulating property is reduced. Will also be excellent. Further, in this case, if a plasticizer is mixed in order to obtain a soft synthetic resin, the plasticizer, which is a liquid, usually escapes from the synthetic resin sheet by evaporation after construction and the synthetic resin sheet shrinks. , Shrinkage deformation and warpage will occur, but the synthetic resin sheet is heat-cured before sticking and laminating, and a certain amount of plasticizer has been removed and it has been shrunk in advance. Is prevented from contracting and deforming.

According to a third aspect of the present invention, there is provided the architectural board according to the second aspect, wherein the synthetic resin sheet is made of a soft vinyl chloride resin and left in an air at about 60 ° C. for about 5 hours. And heat cured. Therefore, in this case, in particular, the synthetic resin sheet made of a soft vinyl chloride resin is sufficiently heated and cured under the condition that it is left in air at about 60 ° C. for about 5 hours, the plasticizer is sufficiently removed, and the shrinkage after the application is performed. Deformation and warpage are reliably prevented.

According to a fourth aspect of the present invention, there is provided the architectural board according to any one of the first to third aspects, wherein the synthetic resin sheet is a sound insulating sheet mixed with a high specific gravity substance. There is a feature. Therefore, in this case, particularly, the synthetic resin sheet is a sound insulating sheet mixed with a substance having a high specific gravity, so that the sound insulating property is improved by the synthetic resin sheet.

According to a fifth aspect of the present invention, there is provided the architectural board according to any one of the first to fourth aspects, wherein a single wooden board is provided on each surface of the medium-density fiberboard on both sides. It is characterized by being adhered and laminated. Therefore, in this case, in particular, wooden veneers appear on both front and back sides, and the whole has an integrated appearance as a wooden board, and even in this case, warping and expansion / contraction deformation occur due to a symmetric layer configuration in the thickness direction. hard.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an embodiment corresponding to claims 1 to 4 of the present invention.
A medium-density fiberboard 2 is attached and laminated on both front and back surfaces of a synthetic resin sheet 1.

In the building board of this embodiment, the synthetic resin sheet 1 is made of a soft synthetic resin mixed with a plasticizer and cured by heating before lamination. In this case, the synthetic resin sheet 1 is made of a soft vinyl chloride resin and left to stand in air at about 60 ° C. for about 5 hours to be cured by heating. The synthetic resin sheet 1 is a sound insulating sheet mixed with a substance having a high specific gravity.

In the architectural board of the embodiment, the surface of one of the medium-density fiberboards 2 is subjected to makeup by painting, polishing, sheet pasting, etc., and the face with the makeup is turned to the front side. Therefore, it is constructed as an interior material such as a floor material, a wall material, a ceiling material, and the like, and particularly, is optimal if constructed as a floor material. Further, in this case, the invasion of moisture from the outside or under the floor is prevented, and the outflow of moisture to the outside or under the floor is also prevented, so that the room is maintained at a desired humidity and becomes comfortable.

Hereinafter, materials such as the synthetic resin sheet 1 and the medium-density fiberboard 2 in the building board of the embodiment and a method of manufacturing the building board will be described in detail based on specific examples. .

The synthetic resin sheet 1 has a specific gravity of 1.7 g / cm ³ , for example, by mixing a high specific gravity substance such as barium sulfate.
Soft vinyl chloride resin sheet (manufactured by Iida Kasei Co., Ltd.) with a thickness of 0.5 to 3.0 mm (usually 1.0 mm)
Is formed. The medium-density fiberboard 2 is an MDF board (manufactured by Hokusin Co., Ltd.) in which wood chips are bonded and integrated with a melamine-based adhesive, and has a thickness of 2.7 to 10.0 mm.

The medium-density fiberboard 2 is adhered and laminated on both front and back surfaces of the synthetic resin sheet 1 via an adhesive. In this case, a vinyl acetate-based adhesive (trade name: 20323H) is used as the adhesive. : Oshika Promotion Co., Ltd.) was used.
The bonding conditions were such that the amount of the adhesive applied was 8 to 10 g / m ² , the pressing pressure was 7 to 10 kg / cm ² , the temperature was room temperature, and the pressing time was 40 minutes.

Therefore, in the architectural board of this embodiment, since the medium-density fiberboard 2 is provided on both the front and back sides, the strength is secured on both the front and back sides and the impact resistance is excellent. . In addition, the layer structure is symmetrical in the thickness direction, and the synthetic resin sheet 1 is interposed between the two medium-density fiberboards 2 to prevent the transfer of moisture between the two medium-density fiberboards. Warpage and elastic deformation are unlikely to occur.

In this case, when installed as a floor material, intrusion of moisture from under the floor and outflow of moisture under the floor are prevented, and when installed as a wall material, intrusion of moisture from the outside and moisture into the outdoor are prevented. When installed as a ceiling material, moisture is prevented from entering from the back of the hut or escaping to the back of the hut. Become comfortable to be held. In particular, when constructed as a flooring material, it is effective because it exhibits strength against impacts such as walking and falling articles.

In the construction board of this embodiment, since the synthetic resin sheet 1 interposed between the medium-density fiberboards 2 on both sides is soft, the shock resistance of the synthetic resin sheet 1 reduces the impact resistance. As well as being improved, the synthetic resin sheet 1 becomes difficult to transmit sound, and has excellent sound insulation. In this case, if a plasticizer is mixed in order to obtain a soft synthetic resin, the plasticizer, which is a liquid, usually escapes from the synthetic resin sheet 1 by evaporation after construction and the synthetic resin sheet 1 shrinks. However, the synthetic resin sheet 1 is heat-cured before lamination and lamination, so that a certain amount of plasticizer is removed and the synthetic resin sheet 1 is contracted in advance. Subsequent shrinkage deformation and warpage are prevented.

Also, in this case, the synthetic resin sheet 1 made of a soft vinyl chloride resin is sufficiently heated and cured under the condition that it is left in air at about 60 ° C. for about 5 hours, and the plasticizer is sufficiently removed. Is reliably prevented from shrinking and deforming.
Furthermore, since the synthetic resin sheet 1 is a sound insulating sheet mixed with a high specific gravity substance, the sound insulating property is improved by the synthetic resin sheet 1.

FIG. 3 shows another embodiment corresponding to all of the first to fifth aspects of the present invention. In the building board of this embodiment, a single wooden board is provided on the surface of the medium density fiberboard 2 on both sides. 3 is attached and laminated. In this case, the wooden veneer 3 is a veneer or other veneer, and the veneer may be either a wet veneer or a dry veneer.

More specifically, based on a specific example, the wood veneer 3 is a decorative veneer (manufactured by National Building Materials Co., Ltd.) having a thickness of 0.2 to 1.0 mm, and its surface is painted. The makeup is applied by polishing or the like. or,
When the wood veneer 3 is attached to the surface of the medium density fiberboard 2, the adhesive is applied via an SBR-based adhesive (trade name: SB-NM-591K: manufactured by Mitsui Toatsu Chemicals, Inc.). 8 to 12 g /
m ² , a pressure of 6 to 7 kg / cm ² , a temperature of 110 to 120 ° C., and a pressing time of 50 minutes.

Therefore, in the architectural board of the embodiment, in particular, the wooden veneers 3 appear on both the front and back sides, and the whole has an integrated appearance as a wooden board. Even in this case, the layered structure is symmetrical in the thickness direction. Warpage and elastic deformation are unlikely to occur. The other parts are manufactured and configured in the same manner as in the above embodiment, and the same operation and effect as in the above embodiment are exerted.

[0023]

As described above, in the building board according to the first aspect of the present invention, the strength is secured on both the front and back sides, the impact resistance is excellent, and the layer structure is symmetric in the thickness direction. In addition, the transfer of moisture between the medium-density fiberboards on both sides is prevented, so that warpage and expansion / contraction deformation are less likely to occur.

In the construction board according to the second aspect of the present invention, the impact resistance and the sound insulation are particularly improved by the soft synthetic resin sheet.
In addition, since the synthetic resin sheet is heat-cured before the lamination and lamination to remove the plasticizer and is in a state of being contracted in advance, contraction deformation and warpage after construction are prevented.

In the construction board according to the third aspect of the present invention, the synthetic resin sheet made of a soft vinyl chloride resin is sufficiently cured by heating under the condition that the sheet is left in air at about 60 ° C. for about 5 hours. Therefore, shrinkage deformation and warping after construction are reliably prevented.

In the construction board according to the fourth aspect of the present invention, since the synthetic resin sheet is a sound insulating sheet mixed with a substance having a high specific gravity, the sound insulating property is improved by the synthetic resin sheet.

Further, in the construction board according to the fifth aspect of the present invention, in particular, a wooden veneer appears on both the front and back sides to have an integral appearance as a wooden board. Due to the symmetrical layer structure, warpage and expansion / contraction deformation hardly occur.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a building plate according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a building plate according to another embodiment.

FIG. 3 is a perspective view showing a building plate as a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Synthetic resin sheet 2 Medium density fiberboard 3 Wood veneer

Claims (5)

[Claims] An architectural plate comprising a synthetic resin sheet and medium-density fiberboards attached and laminated on both front and back surfaces. 2. The architectural board according to claim 1, wherein the synthetic resin sheet is made of a soft synthetic resin mixed with a plasticizer and cured by heating before lamination. 3. The architectural plate according to claim 2, wherein the synthetic resin sheet is made of a soft vinyl chloride resin and is left to stand in air at about 60 ° C. for about 5 hours to be cured by heating. . 4. The architectural plate according to claim 1, wherein the synthetic resin sheet is a sound insulating sheet mixed with a high specific gravity substance. 5. The architectural board according to any one of claims 1 to 4, wherein a wooden veneer is stuck and laminated on the surface of each of the medium-density fiberboards on both sides.