JP3016011B2 - Decorative board - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a decorative panel, and more particularly to a decorative panel having an excellent effect of preventing free formaldehyde emission.

[0002]

2. Description of the Related Art Decorative boards made of plywood, fiber board, particle board, laminated veneer laminate, etc., and the surface of which is subjected to optional makeup, such as decorative materials such as walls, floors, ceilings, furniture and fittings, etc. Widely used for construction as a cosmetic material.
In the manufacture of the substrate, a resin adhesive using formaldehyde as a raw material such as a urea resin, a melamine resin, and a phenol resin is generally used from the viewpoint of cost.

[0003] However, these adhesives contain free formaldehyde, and free formaldehyde is gradually diffused into the atmosphere from a decorative board manufactured using the obtained substrate. For this reason, especially when used as a decorative material for interior decoration or a furniture fitting, there is a problem of pollution of the indoor environment due to emission of free formaldehyde.

[0004] An adhesive free of free formaldehyde may be used in the manufacture of the substrate, but is expensive.
Actually, it is difficult to realize because water resistance is insufficient, and there is a problem that the adhesive easily adheres to a hot plate at the time of manufacturing to lower productivity.

[0005] Therefore, it has been proposed to attach a decorative paper containing a chemical agent that adsorbs and reacts with free formaldehyde on the surface of the substrate (Japanese Patent Publication No. 51-42166).
JP-B-52-134, JP-B-55-33988).

[0006]

However, according to this prior art, a decorative paper containing a free formaldehyde-adsorbing agent is stuck to one side of a substrate, so that the decorative plate is likely to be warped, and the post-installation work is difficult. There is a problem that the decorative board is wavy due to expansion due to moisture absorption from the back surface side, and that a kiguchi push-up occurs at a kiguchi abutment portion.

When the moisture content of the substrate increases due to moisture absorption from the back side, the amount of free formaldehyde emitted increases, and there is a possibility that the agent contained in the decorative paper on the front surface may not be able to absorb it.

[0008]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a decorative board capable of suppressing the emission of free formaldehyde from an adhesive used in the production of a substrate and preventing the occurrence of warpage. .

That is, in the decorative board according to the present invention, a decorative material is applied to the surface of the substrate, and a sheet-like material containing an agent that adsorbs and reacts with free formaldehyde is attached to at least the back surface of the substrate. A moisture-proof sheet is further laminated on the back surface of the article.

The back sheet may be further laminated on the back of the moisture-proof sheet. On the back sheet,
It can be used by containing an agent that reacts with adsorption to free formaldehyde.

The makeup can be applied by painting the surface of the substrate with a paint containing a chemical agent that adsorbs and reacts with free formaldehyde. Further, the makeup may be applied by sticking a cosmetic material containing a chemical agent that adsorbs and reacts with free formaldehyde on the surface of the substrate.

[0012]

FIG. 1 shows the structure of a decorative board according to the present invention, in which a decorative layer 2 is provided on the surface of a substrate 1, and
A sheet-like substance 3 containing a drug that adsorbs and reacts with free formaldehyde is adhered to at least the back surface of the substrate 1, and a moisture-proof sheet 4 is further laminated on the back surface.

As the substrate 1, a plywood, a fiber board, a particle board, a wafer board, a flake board, an oriented strand board, a stick board, a veneer laminated material, a laminated material, or the like is used.

Substrate 1 optionally subjected to a base treatment
A decorative layer 2 is obtained by applying a colored coating or a pattern printing to the surface of the substrate. The paint used at that time can contain a chemical agent that adsorbs and reacts with free formaldehyde.
In addition, a veneer or artificial veneer or a backing material to which a backing material such as paper, Japanese paper, nonwoven fabric, or the like, or a decorative material such as a decorative paper, a decorative resin-impregnated paper, or a cosmetic synthetic resin-impregnated sheet is bonded to the surface of the substrate 1. It may be worn to form the decorative layer 2. Veneer or artificial veneer as a cosmetic material or on the back of them, Western paper, Japanese paper,
When a backing material such as a nonwoven fabric is used, one or both of a veneer, an artificial veneer, and a backing material can be used by containing an agent that undergoes an adsorption reaction with free formaldehyde.

On the back surface of the substrate 1, a sheet material 3 containing an agent that reacts with free formaldehyde by adsorption is attached. As the sheet material, Western paper, Japanese paper, nonwoven fabric, or the like is used.

As a drug that reacts with free formaldehyde by adsorption reaction, drugs such as proteins, amides, and ureas are used. The drug is applied to a sheet in the form of a solution and impregnated, dried, and dried. To be contained in the product. The application and impregnation of the sheet solution with the drug solution is performed by any method such as spraying, flow coater, curtain coater, roll coater, dipping and the like.

After an adhesive is applied to one or both of the back surface of the substrate 1 and the surface of the sheet-like material 3, the adhesive is laminated, pressed and adhered. As the adhesive at this time, a synthetic resin adhesive such as vinyl acetate, ethylene acetate, vinyl urethane, or acrylic is used, and is applied by a spray, a roll coater, or the like. The pressing is performed by hot or cold pressure using a flat plate press, a roll press, a laminator, or the like.

As the moisture-proof sheet 4 laminated on the back surface of the sheet 3, a synthetic resin film or sheet such as polypropylene, polyethylene, vinyl chloride, vinylidene chloride or the like is used. It is laminated.

A moisture-proof sheet is provided on the back surface of the sheet-like material 3.
Further, a three-layer structure in which a back sheet is laminated on the back surface may be used. These three layers are laminated by adhesion or heat fusion. As the back sheet, Western paper, Japanese paper, non-woven fabric, or the like is used, and the back sheet may contain a chemical agent that adsorbs and reacts with free formaldehyde. The free formaldehyde-adsorbing agent contained in the back sheet is a sheet-like material 3
May be the same as or different from the drug contained in.

When bonding the sheet 3 to the moisture-proof sheet, or the sheet 3 to the moisture-proof sheet and the back sheet, the adhesive used at this time is a synthetic resin adhesive such as vinyl acetate, ethylene acetate, vinyl urethane, acrylic or the like. Are used and laminated by a laminator.

[0021]

According to the present invention, since a sheet-like substance adhered to the back surface of a substrate contains a drug that adsorbs and reacts with free formaldehyde, free formaldehyde contained in the substrate is adsorbed by the drug and the air is released. Emission into the inside is suppressed.

By making the decorative layer contain a chemical agent which adsorbs and reacts with free formaldehyde, the effect of suppressing the emission of free formaldehyde from the base material to the atmosphere is more remarkably exhibited. Can absorb free formaldehyde emitted from other members in a room in which the decorative board is used, and is thus excellent in the effect of preventing indoor environmental pollution.

In the decorative plate of the present invention, a decorative layer is provided on the surface of the substrate and a drug-containing sheet is provided on the back surface,
Since the front and back balance is maintained, the decorative board is hardly warped.

In particular, by laminating a moisture-proof sheet on the back surface of the sheet-like material, the absorption of moisture from the back surface after construction is suppressed, and the occurrence of warpage due to the expansion of the back surface of the decorative board due to the moisture absorption. It can be effectively prevented. Further, since the water content can be prevented from increasing due to moisture absorption, the amount of free formaldehyde emitted can be suppressed.

Further, by laminating the back sheet on the back side of the moisture-proof sheet, the adhesive is sufficiently impregnated into the back sheet in the construction of the decorative board, so that the adhesive force due to the anchor effect is increased, and the construction with the adhesive is possible. Becomes In addition, by including a free formaldehyde-adsorbing agent in the moisture-proof sheet, indoor environmental pollution can be more effectively prevented.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a configuration of a decorative board according to an embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 1 substrate 2 decorative layer 3 free formaldehyde-adsorbing agent-containing sheet material 4 moisture-proof sheet

Claims (5)

(57) [Claims] Claims: 1. An optional makeup is applied to the surface of a substrate,
At least on the back surface of the substrate is adhered a sheet-like substance containing a drug that adsorbs and reacts with free formaldehyde,
A decorative plate, wherein a moisture-proof sheet is further laminated on the back surface of the sheet-like material. 2. The decorative board according to claim 1, wherein a back sheet is further laminated on the back of the moisture-proof sheet. 3. The decorative board according to claim 2, wherein the back sheet contains a chemical agent that adsorbs and reacts with free formaldehyde. 4. The decorative panel according to claim 1, wherein the decorative panel is applied by applying a paint containing an agent capable of adsorbing and reacting to free formaldehyde on the substrate surface. 5. The decorative panel according to claim 1, wherein the decorative panel is applied with a decorative material containing a chemical agent that adsorbs and reacts with free formaldehyde on the surface of the substrate.