JP2909734B1 - Architectural board - Google Patents

Abstract

An object of the present invention is to obtain a building board for a plywood substitute having sufficient strength by using a wood chipboard or a wood fiber board. A decorative material (3) is stuck on the surface of a substrate (1), and on the back surface of the substrate (1), the substrate has a moisture-proofing property, and the tensile strength in the vertical and horizontal directions is equal, and the tensile strength is at least 7 kgf / mm ² or more. A building board on which a synthetic resin-impregnated paper laminate 2 having the following is adhered.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION This invention relates to structural panels,
The present invention relates to a building plate usable for wall materials, flooring materials, fittings or furniture.

[0002]

2. Description of the Related Art Conventionally, as a building board, plywood in which veneers are laminated and bonded with their fiber directions orthogonal to each other, and parallel plywood (LV.
L. ) Is known, and it can supply a large amount of plate which cannot be obtained with a sawn wood in a large amount and stably supply it, and since it has excellent dimensional stability and strength, it can be used for various applications. It is indispensable as one of the current building materials.

[0003]

However, this plywood is
Due to the lamination and production of veneers made of natural wood stripped thinly, the issue of depletion of natural resources has become a major issue worldwide, making it difficult to cut down the raw wood, and deteriorating the quality of the raw wood This makes it difficult to obtain a large amount of high quality veneer used for veneer, and it becomes difficult to supply a large amount of high quality plywood to the market. This problem is expected to become more serious in the future, and there is an aspiration to provide an alternative to conventional plywood.

[0004] Wood chipboard such as wood fiber board, particle board, strand board, and wafer board has been provided as a wood board in place of plywood, but performance equivalent to dimensional stability and bending strength of plywood has been obtained. If so, it is necessary to make it thicker than the plywood, and accordingly, the weight increases, the handling becomes difficult, and the cost also increases.

[0005]

DISCLOSURE OF THE INVENTION The present invention has been completed as a result of intensive studies for the purpose of providing a new building board which can be used as a substitute for conventional plywood.
That is, in the present invention, the decorative material is stuck to the surface of the substrate, and the back surface of the substrate has moisture-proof performance, the tensile strength in the vertical direction and the horizontal direction is equal, and has a tensile strength of at least 7 kg / mm ² or more. An architectural board characterized in that a synthetic resin-impregnated paper laminate is stuck.

[0006]

According to the architectural plate of the present invention, it has a moisture-proof property, the tensile strength in the vertical direction and the tensile strength in the horizontal direction are equal, and at least 7 kg /
The laminated resin-impregnated paper laminate having a thickness of ² mm or more is attached to the back surface of the substrate, thereby preventing the absorption of moisture from the back surface of the substrate, preventing the expansion and contraction due to the change in the water content, and allowing the substrate to be used alone. Since the strength such as bending strength and bending deflection can be improved, even if a wooden board other than plywood is used as a substrate, the same strength can be obtained within the same thickness as plywood. Further, even when used in a place where bending load is applied particularly in the longitudinal direction, such as a joist floor material, the material shows sufficient strength.

[0007]

FIG. 1 shows an example of a sectional view of a building plate according to the present invention. A decorative layer 3 is formed on a surface of a substrate 1 having a fitting fruit formed on a side surface, if necessary. A synthetic resin-impregnated paper laminate 2 is adhered to the back surface of 1. As the substrate 1 of the present invention, a wood chip board such as a particle board, a wafer board, a flake board, a strand board, and a stick board, and a wood fiber board can be used. In addition, a homogeneous wood fiberboard having a high surface hardness, excellent smoothness, and no directionality is preferable.

The decorative layer 3 formed on the surface of the architectural board substrate 1 of the present invention includes a natural veneer, an artificial veneer obtained by cutting natural wood, and a veneer lined with a nonwoven fabric, paper, or a synthetic resin sheet. A sheet or a decorative material such as a decorative paper, a resin-impregnated paper, a nonwoven fabric, a paper, and a synthetic resin sheet can be used.

Further, an overcoat layer can be provided on the surface of the decorative layer 3. Further, it can also be formed by directly printing, painting or the like on the surface of the substrate 1.
By forming such a decorative layer 3, the permeation of moisture from the surface side is also prevented, and problems such as warpage, dew condensation, and corrosion due to humidity change can be solved.

Further, as the synthetic resin-impregnated paper laminate 2 to be adhered to the back surface of the substrate 1, phenol resin, urea resin,
It is possible to use one obtained by laminating a plurality of thermosetting resins, such as a melamine resin, an epoxy resin, an alkyd resin, and an unsaturated polyester resin, impregnated in paper or a woven fabric and heating them.

The synthetic resin-impregnated paper laminate 2 has a thickness of 0.1 mm.
A substrate having a thickness of 45 to 4 mm and thinner than the substrate 1 is used. Preferably, a substrate having a thickness of 1/4 or less of the substrate 1 is used. As the ratio of the thickness of the synthetic resin-impregnated paper laminate 2 to the total thickness of the building board increases, the specific gravity of the building board increases, and the usability at the transport and construction sites becomes very poor.

[0012] Further, there also arises an adverse effect such that processing with a tool used for cutting or cutting a conventional plywood or other wooden material becomes difficult.

The synthetic resin-impregnated paper laminate 2 used in the present invention
Used have the same tensile strength in the longitudinal and transverse directions. The tensile strength of the synthetic resin-impregnated paper laminate was 7 kgf /
One having a strength of at least mm ² is used. Thus, assuming that the tensile strength in the longitudinal direction is equal to the tensile strength in the transverse direction,
When laminating the resin-impregnated papers, the papers are stacked so that the fiber directions of the papers are alternately orthogonal to each other, and then heat-molded, so that the overall thickness is thin and the tensile strength in the longitudinal and transverse directions is 7 kgf / mm ^2.
The above synthetic resin-impregnated paper laminate is obtained.

Such a synthetic resin-impregnated paper laminate is used as a substrate 1
By attaching to the back surface of the plywood, the bending strength in the vertical and horizontal directions of the architectural plywood is the same thickness or less as that of the conventional plywood, and the bending direction in the direction parallel to the fiber direction of the front and back veneers of the conventional plywood. It has the same bending strength as.

Further, as the synthetic resin impregnated paper laminate 2,
To use those having the following equivalent moisture barrier quality water vapor permeability ^7g / m 2 · 24hr. By using such a synthetic resin-impregnated paper laminate, it is possible to prevent moisture from being absorbed into the substrate 1 from the back surface of the architectural plate, and to prevent expansion and contraction of the architectural plate due to a change in humidity. Can be.

Furthermore, by using a uniform board having no fiber direction, such as a wood fiber board, as the board 1 of the building board of the present invention, the dimensional stability and strength characteristics in the vertical and horizontal directions are equal. It becomes a building plate. For this reason, when plywood is conventionally used at various sites, the fiber direction (longitudinal direction of the plywood) of the front and back veneers of the plywood must be used in a direction in which bending strength is required. Although the direction of use has been restricted, the architectural plate of the present invention is not limited in such a direction of use, and can be used with priority on increasing the yield on site.

Further, among the wood fiber boards, the specific gravity is remarkably higher in the vicinity of the front and back surfaces than in the center of the wood material due to the influence of the movement of moisture in the wood fiber board at the time of manufacture, the content of the resin, and the way of transmitting heat. It is preferable to use one having a high hard layer formed thereon and having an average specific gravity of 0.56 to 0.87 as a whole. By combining such a substrate 1 and the synthetic resin impregnated paper laminate 2, it is thinner than plywood and has strength equal to or higher than that of conventional plywood.

Further, since formaldehyde released from building members indoors has a bad effect on human bodies, materials which do not release formaldehyde as plate materials or core materials for forming building members have recently been provided. . However, such a plate material or a core material that does not release formaldehyde tends to generate mold and corrode with an increase in the water content thereof, so that it is necessary to perform a new treatment to prevent these.

However, according to the construction plate of the present invention, penetration of moisture from the back side is blocked by the synthetic resin impregnated paper laminate, and a decorative material such as a synthetic resin sheet or the like as a decorative layer on the front side. The formation of the overcoat layer also prevents the penetration of moisture from the surface side. further,
By applying a synthetic resin to the opening as required, penetration of water into the substrate can be completely suppressed, and problems such as mold and corrosion do not occur.

Further, even with a plate material containing formaldehyde therein, the penetration of moisture from the back side of the architectural plate of the present invention is blocked by the synthetic resin-impregnated paper laminate, and furthermore, the synthetic resin is used as a decorative layer on the front side. According to the configuration in which the formation of a decorative material such as a sheet or an overcoating layer also prevents the penetration of moisture from the surface side, it is possible to suppress the release of formaldehyde in the substrate.

The architectural plate of the present invention is adhered to the back surface of the substrate 1 or the surface of the synthetic resin-impregnated paper laminate 2 by applying an adhesive in a conventional manner, and by heating and pressing. Then substrate 1
It can be manufactured by applying an adhesive to the surface of the base material, placing a decorative material thereon, and heating and pressing.

[0022]

According to the architectural plate of the present invention, a synthetic resin-impregnated paper laminate having moisture resistance on the back surface of the substrate, equal tensile strength in the vertical and horizontal directions, and at least 7 kgf / mm ² or more is provided on the back surface of the substrate. By being attached, it is possible to prevent the absorption of moisture from the back surface of the substrate, to prevent expansion and contraction due to a change in the water content, and to improve the bending strength and bending strength of the substrate alone. Therefore, even if a wooden board other than plywood is used as a substrate, the same strength can be obtained within the same thickness as plywood. Further, even when used in a place where bending load is applied particularly in the longitudinal direction, such as a joist floor material, the material shows sufficient strength.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a building plate of the present invention,

[Explanation of symbols]

 1: substrate, 2: synthetic resin impregnated paper laminate, 3: decorative layer.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI E04F 13/16 E04F 13/16 A

Claims (2)

(57) [Claims] 1. A decorative material is stuck on the surface of a substrate, and on the back surface of the substrate, the substrate has a moisture-proof property, the tensile strength in the longitudinal direction and the transverse direction are equal, and has a tensile strength of at least 7 kgf / mm ² or more. An architectural board characterized in that a synthetic resin impregnated paper laminate is stuck. 2. The architectural board according to claim 1, wherein the fiber directions of the impregnated paper constituting the synthetic resin impregnated paper laminate are orthogonal to each other.