JPH10109380A - Decorative board and flush panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To positively prevent a warp attributed to moisture absorption/desorption from being generated and improve environmental compatibility during incineration by bonding a decorative paper consisting of a moisture impermeable resin layer formed on the back face to one of the faces of a wooden board in such a manner that the decorative paper comes into contact with the moisture impermeable resin layer, and bonding a lining paper to the other face of the wooden board directly or through a moisture impermeable resin layer. SOLUTION: A moisture impermeable resin layer 3 is previously applied to the back face of a decorative board 4, prior to the bonding of a wooden board 2 to the back face of the decorative board 4, through thermal melting using a T-die. Alternatively, a previously molded film is thermally laminated under pressure beforehand to the rear face of the decorative paper 4. The moisture impermeable resin layer 3 is preferably a thermoplastic synthetic resin such as polyethylene, polypropylene or polyvinydene. When using polypropylene as the moisture impermeable resin layer 3, it is preferable to treat the surface of the polypropylene resin by corona discharge. Further, it is recommended that the moisture impermeable resin layer 3 be also formed on the back face of a lining paper 5. An adhesive to be used for bonding the decorative paper 4 or the lining paper 5 to the wooden board 2 is such as water vinylurethane.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a decorative board and a flash panel using the same.

[0002]

2. Description of the Related Art A decorative board using a thin medium-density fiberboard or a particle board as a base material has poor dimensional stability due to a change in humidity as compared with a plywood sheet, and warpage or distortion occurs. For this reason, a vinyl chloride resin sheet is laminated on both sides of a wooden board, an aluminum sheet is laminated on both sides of a wooden board,
And other warp prevention methods have been proposed. These are all techniques for blocking the movement of moisture to the wooden board, and their effects have been confirmed.

[0003]

However, in the method (1), when the vinyl chloride resin burns due to a fire or the like, chlorine gas is generated, which poses a problem for the environment and the human body. A high-priced adhesive called ethylene vinyl acetate resin (EVA-based) must be used. Compared with vinyl acetate resin and water-based vinyl urethane, which are commonly used for bonding flash panel frames. The cost increases. According to the above method, the aluminum sheet itself is expensive, and it is difficult to completely bond the aluminum sheet to the wooden board.

[0004] Further, since each of these methods is a method of interposing a sheet material between a top sheet and a base material, there is a problem that the number of manufacturing steps is increased and the cost is increased. An object of the present invention is to be able to easily and inexpensively prevent warpage and irregularity caused by moisture absorption and release in a decorative board using a specific gravity fiber board in a thin material or a particle board, and to affect the environment even if disposed by incineration or the like. The aim is to provide a technology with little.

[0005]

According to the present invention, a decorative paper having a moisture-impermeable resin layer formed on one side of a wooden board is adhered so as to be in contact with the moisture-impermeable resin layer, and a backing paper is formed on the other side. Are required to be bonded directly or via a moisture-impermeable resin layer. Hereinafter, the present invention will be described in detail with reference to the drawings.

As the wood board 2 in the present invention, a medium specific gravity fiber board, a particle board, a plywood, an LVL, an LVB, and a hard board can be used. When using a strand board, a wafer board, or the like, it is necessary to smooth the surface by subjecting it to polishing or polishing, since the surface has significant irregularities. As a decorative board, a medium specific gravity fiber board having a thickness of about 2 to 5 mm is preferably used from the viewpoint of specific gravity, workability, surface smoothness and the like. These wooden boards may be used individually or in combination.

The decorative paper 4 and the backing paper 5 weigh 23 to 30 g.
/ M2, thin paper, titanium paper, kraft paper, or the like. The decorative paper 4 for the surface is subjected to gravure printing or the like on a desired pattern on the surface of the base paper, and a synthetic resin such as a urethane resin or an amino alkyd resin is formed on the surface to improve the stain resistance and chemical resistance. It is advisable to apply a top coat with resin paint.

Before bonding the decorative paper 4 to the wooden board 2, the moisture-impermeable resin layer 3 is previously heated and melted using a T-die or the like before being bonded to the wooden board 2, or a previously formed film is hot-press laminated. Keep it. The moisture-impermeable resin layer 3 is preferably made of a thermoplastic synthetic resin such as polyethylene, polypropylene, or polyvinylidene, and has a thickness of about 20 to 40 μm. If it is 20 μm or less, it is insufficient to block moisture, and if it is 40 μm or more, not only will it be expensive, but it will be difficult to form a coating film.

When polypropylene is used as the moisture-impermeable resin layer 3, there is concern about adhesion to the wooden board 2. Therefore,
If the polypropylene resin surface is subjected to corona discharge treatment, the non-moisture permeable resin surface 3 becomes coarse, the wetting of the adhesive is improved, and the wood substrate 2 can be firmly bonded. Further, not only the polypropylene resin but also other resins may be subjected to a corona discharge treatment to improve the adhesiveness.

It is preferable to form a moisture-impermeable resin layer 3 on the back surface of the backing paper 5 in advance in order to further prevent warping and deviation. Further, it is preferable to form a non-moisture permeable resin coating on the wooden board at the mouth of the board, because the moisture absorption and release of the decorative board can be further blocked. As an adhesive for bonding the decorative paper 4 or the backing paper 5 to the wooden board 2, an adhesive such as aqueous vinyl urethane can be used.

As described above, the decorative board 1 can be obtained in which the movement of moisture is blocked by the moisture-impermeable resin layer 3 and the warpage and the disorder can be prevented as much as possible. This decorative board 1 can be used as a decorative facing material for construction, but as shown in FIG. 2, solid wood, laminated wood, LVL
It can also be used as a lightweight flash panel for doors, partitioning bodies, etc. by sticking to both sides of a core material 6 made of the same or the like via an adhesive such as aqueous vinyl urethane or vinyl acetate resin emulsion. Hereinafter, examples of the present invention will be described.

[0012]

Example 1 On the surface of a medium density fiberboard having a thickness of 3.0 mm,
A woodgrain pattern is printed on the surface of thin paper having a weight of 23 g / m2, and a urethane resin is overcoated, and a polypropylene resin film is formed on the backside by heating and melting with a T-type die, and the surface is subjected to corona discharge treatment to roughen the resin surface. The decorative paper was adhered via an aqueous vinyl urethane adhesive. On the backside of the medium-density fiberboard, a polypropylene resin film was formed on the backside of thin paper of 23 g / m2 by heating and melting with a T-type die, and the backside was roughened by corona discharge treatment on the surface. The paper was glued together with the aqueous vinyl urethane adhesive to obtain the desired decorative board.

Subsequently, a frame material is formed by framing a core material in which the laminated wood is formed into a square shape, and the decorative plate is coated on both sides of the frame material with a vinyl acetate resin emulsion adhesive so that the surface of the decorative paper is on the front side. Then, a flash panel having a hollow structure was obtained by forming a void portion inside by bonding with a medium specific gravity fiber board.

[0014]

Example 2 After plugging the surface of a plywood having a thickness of 2.5 mm, a woodgrain pattern was printed on the surface of thin paper having a weight of 23 g / m2, and an aminoalkyd resin was overcoated, and a polyvinylidene resin film was formed on the back surface. Was formed with a thermocompression bonding roll apparatus, and the decorative paper was bonded via an aqueous vinyl urethane adhesive. On the back side of the plywood, a backing paper in which a polyvinylidene resin film is formed on the back side of a thin paper having a weight of 23 g / m 2 by a thermocompression roll device is similarly adhered via an aqueous vinyl urethane adhesive to obtain a decorative board to be obtained. Was.

Subsequently, a frame material is formed by framing a core material made of a solid material in a square shape, and the decorative plate is coated on both sides of the frame material with a vinyl acetate resin emulsion adhesive so that the surface of the decorative paper is facing up. Then, a flash panel having a hollow structure was obtained by bonding a plywood surface to form a void portion inside.

[0016]

Example 3 On the surface of a medium density fiberboard having a thickness of 3.0 mm,
A woodgrain pattern is printed on the surface of a thin paper having a weight of 23 g / m2, and a urethane resin is overcoated, and a polyethylene resin film is formed on the back surface by heating and melting with a T-type die. The roughened decorative paper was bonded via an aqueous vinyl urethane adhesive. A backing paper made of thin paper having a weight of 23 g / m2 was adhered to the back surface of the medium-density fiberboard via the same aqueous vinyl urethane adhesive to obtain a decorative board.

Subsequently, a frame material is formed by framing a core material in which the LVL is formed into a square shape, and the decorative plate is coated on both sides of the frame material with a vinyl acetate resin emulsion adhesive with the surface of the decorative paper facing up. Thus, a flash panel having a hollow structure was obtained by forming a void portion inside by bonding to a medium specific gravity fiber board surface.

[0018]

Comparative Example A decorative paper coated with a urethane resin by printing a wood grain pattern on the surface of a thin paper having a weight of 23 g / m2 on the surface of a medium specific gravity fiberboard having a thickness of 3.0 mm through an aqueous vinyl urethane adhesive. The desired decorative plate was obtained by bonding. Then,
A frame material is formed by framing a core material in which LVL is formed into a square shape, and the above-described decorative board is attached to both sides of this frame material with a vinyl acetate resin emulsion adhesive with the surface of the decorative paper facing up, and the inside is internally bonded. A flash panel having a hollow structure by forming a void was obtained.

An environmental test was performed to measure the warpage of the above Examples 1 to 3 and Comparative Example. The dimensions of each specimen are 3 ×
The test conditions are 25 ° C / 60% humidity on one side and 2 on the other side.
0 ° C./humidity 90%. The results are shown in FIG.

[0020]

According to the present invention, since the decorative plate is formed by directly bonding the substrate and the moisture-impermeable resin layer, the decorative plate has a structure in which paper is interposed between the substrate and the moisture-impermeable resin layer as in the prior art. It can be cheaper in comparison. Also, when manufacturing flash panels,
Since the decorative board and the frame material are directly bonded to the paper layer of the decorative board and the frame material, an inexpensive adhesive such as a conventionally used vinyl acetate resin can be used as the adhesive. Further, as is clear from the test results, the effect on warpage and deviation is sufficiently exhibited.

[Brief description of the drawings]

FIG. 1 is a sectional view of a decorative board according to the present invention.

FIG. 2 is a sectional view of a flash panel according to an embodiment of the present invention.

FIG. 3 shows a result of a warp test of an example of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Decorative board 2 Wood board 3 Non-breathable resin layer 4 Decorative paper 5 Backing paper 6 Core material

Claims (4)

[Claims] 1. A decorative board in which a decorative paper having a moisture-impermeable resin layer formed on one surface of a wooden board is adhered so as to be in contact with the moisture-impermeable resin layer on the back surface, and a backing paper is adhered to the other surface. 2. The decorative board according to claim 1, wherein a moisture-impermeable resin layer is also formed on a surface of the backing paper which is in contact with the wood board. 3. A decorative board having, on one side of a wooden board, a decorative paper having a moisture-impermeable resin layer formed on the back side so as to be in contact with the moisture-impermeable resin layer and a backing paper adhered to the other side, Flash panel bonded to both sides of the core material with an adhesive. 4. The flash panel according to claim 3, wherein a moisture-impermeable resin layer is also formed on a surface of the backing paper in contact with the wooden board.