JPH0776485B2 - Non-combustible natural wood decorative material and its manufacturing method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a nonflammable natural wood decorative interior material and a method for producing the same.

[0002]

2. Description of the Related Art Generally, the point of producing a non-combustible natural wood decorative interior material (hereinafter simply referred to as a decorative interior material) is to use a non-combustible substrate on which a natural thin wood decorative veneer (see In, it is also simply called thin veneer or veneer.)
Is in the point of bonding. As the non-combustible substrate, an inorganic board made of calcium asbestos silicate is usually used. The inorganic board is cement-containing and alkaline.

[0003]

Therefore, a non-combustible decorative interior material in which a decorative thin veneer of natural wood is adhered to an inorganic board is produced, so that the alkaline component of the inorganic board is leached on the surface after the production, and the decorative thin veneer is easily removed. There is a problem that the plate is discolored from blue to black (discoloration due to alkali contamination) and the commercial value is lost.

Therefore, conventionally, a sealer (undercoating agent made of a resin component) is applied to the inorganic board to prevent leaching of the alkaline component. However, if the sealer is not sufficiently applied by this means, alkaline components will leaching out from the fine pores of the applied sealer, resulting in alkali contamination of the decorative veneer. It should be noted that when the sealer is applied sufficiently, leaching of alkaline components can be prevented, but with ordinary adhesives, the adhesiveness of the decorative thin veneer is poor, and the disadvantage that the adhered decorative veneer peels off occurs. .

Another conventional means for preventing alkali contamination is to adhere a paper having a weight of, for example, 20 to 36 g / m ² to an inorganic board, and apply an adhesive agent of a resin component onto the paper to apply a thin makeup. This is to bond a single plate. However, this means causes leaching of alkaline components if the amount of adhesive applied during paper application is not appropriate. The amount of adhesive applied is usually 70-
90 g / m ² is preferable, and if less than this, there is leaching of alkaline components. Further, when the coating amount is larger than the above-mentioned amount, the amount of the adhesive for adhering to the decorative thin veneer to be stuck onto the paper is reduced, so that the adhesive for adhering to the decorative veneer is less than that of the decorative veneer. This causes the inconvenience of seeping into the surface. As described above, the latter method has a problem that it is difficult to adjust the amount of adhesive applied and it is difficult to implement the method on the production line.

Therefore, the object of the present invention is to solve each of the disadvantages of the above-mentioned conventional means for preventing alkali contamination in a decorative interior material having a structure in which a decorative thin veneer of natural wood is adhered on an alkaline noncombustible substrate such as an inorganic board. It is to solve the problem.

That is, the first problem is that the alkaline component of the non-combustible base material is prevented from leaching into the decorative thin veneer, the decorative thin veneer is not discolored for a long period of time, and the commercial value due to the discoloration is not impaired. The purpose of the present invention is to provide a decorative interior material.

A second object of the present invention is to prevent the alkaline component of the non-combustible substrate from leaching into the decorative thin veneer, prevent the decorative thin veneer from being discolored for a long period of time due to alkali contamination, and to be applied to the production line site. It is to provide a method for producing a nonflammable decorative interior material that is easy to carry out.

[0009]

In order to solve the above-mentioned first problem, a first aspect of the present invention provides a decorative thin veneer of natural wood by interposing an alkaline impermeable sheet on an alkaline noncombustible substrate. A decorative interior material that is adhered, wherein the alkaline impermeable sheet has a structure in which a fibrous sheet impregnated with an adhesive is polymerized and adhered to both sides of a resin film that does not allow an alkaline component of the noncombustible substrate to penetrate. It is characterized by

In order to solve the above-mentioned second problem, the second invention is that an alkaline impermeable sheet is bonded onto an alkaline noncombustible substrate via an adhesive, and the alkaline impermeable sheet is adhered. A method for producing a decorative interior material by bonding a decorative thin plate of natural wood onto the decorative interior material through an adhesive, wherein the alkaline impermeable sheet does not allow the alkaline substance of the noncombustible substrate to penetrate. A sheet having a structure in which a fibrous sheet impregnated with an adhesive is polymerized and adhered to both surfaces of the film is used.

The non-combustible substrate is calcium asbestos silicate,
An alkaline inorganic board such as asbestos, gypsum, or asbestos cement is used. The decorative thin veneer is, for example,
It is a thin veneer cut from natural wood such as zelkova, teak, rose, or cedar, preferably name wood, to a thickness of, for example, 0.2 to 0.3 mm. The alkaline impermeable sheet has a structure in which a fibrous sheet impregnated with an adhesive such as paper or non-woven fabric is polymer-bonded to both surfaces of a resin film that does not allow an alkaline component to permeate. The alkaline impermeable sheet has, for example, a structure in which a nonwoven fabric is adhered to both sides of a polypropylene film, or a structure in which paper is laminated to both sides of a polyethylene film. The resin film and the fibrous sheet are selected and used in advance by a preliminary test so that the alkaline component is not permeated and the adhesive film has an impregnating property.

[0012]

In the invention of claim 1, the resin film does not allow the alkaline component of the noncombustible substrate to permeate. Both sides of the resin film are bonded to the fibrous sheet. The fibrous sheet has high adhesiveness to the adhesive. The non-flammable substrate is non-flammable.

In the invention of claim 2, the nonflammable decorative interior material is obtained by bonding a nonflammable substrate, an alkaline impermeable sheet and a decorative thin veneer. Both sides of the alkaline impermeable sheet are fibrous sheets and have high adhesiveness. The resin film of the alkaline impermeable sheet does not allow the alkaline components of the noncombustible substrate to pass through.

[0014]

Embodiments of the present invention will be described below with reference to FIGS. FIG. 1 shows a decorative interior material 1 of this example. The width and length of the decorative interior material 1 are usually set to predetermined dimensions for building materials. The decorative interior material 1 includes an alkaline non-combustible substrate 2 and an alkaline impermeable sheet 4 having the same size as the surface (upper surface) of the non-combustible substrate 2 interposed therebetween.
The decorative thin veneer 8 having the same size as the surface of the above is adhered, and the transparent protective layer 9 is coated on the surface of the adhered decorative veneer 8.

As the non-combustible substrate 2 of this example, a 6 mm thick asbestos calcium silicate plate (trade name "Asbeston" manufactured by Ask Co., Ltd.) was used. The asbestos used was a plate body having a thickness of 8 mm, which was smoothed by sanding the front surface and the back surface by 1 mm each in advance. As shown in FIG. 4, the alkaline impermeable sheet 4 of this example has a fibrous sheet 6 on both sides of a resin film 5 such as polypropylene having a thickness of 20 to 40 μm.
Is heat-bonded at a rate of 12 to 20 g / m ² and has a three-layer structure. The fibrous sheet 6 is made of non-woven fabric, woven fabric, or paper, and in this example, non-woven fabric having vinylon fiber and pulp in a ratio of 3: 7 is used.

The alkaline impermeable sheet 4 of this example is
As shown in FIG. 5, polypropylene resin 5A in a molten state
Is discharged in the form of a film from the discharge port 11A of the resin supply unit 11 in a flow coater manner, while the nonwoven fabric is fed from a roll around which the nonwoven fabric to be the fibrous sheet 6 is fed, and the fibrous sheet 6 is discharged on both sides of the discharged resin film 5. It is formed into a three-layer structure by stacking and laminating by the cold pressure of the deaeration roll 12 and the compression roll 13.

Thus, the decorative interior material 1 of this example is manufactured in the following steps. That is, first, both surfaces of the nonflammable substrate 2 are subjected to a sealer treatment (not shown) to improve the adhesiveness. For the sealer treatment, for example, a sealer agent containing urethane resin or epoxy resin as a component is sprayed with a spray gun and naturally dried to obtain a sealer treatment layer (not shown).
Was set up. The amount of the sealant applied is 60 to 80 g / m ^{2 on} the surface of the nonflammable substrate and 100 to 1 on the back surface.
20 g / m ^{2 was} applied.

Next, as shown in FIG. 6, 80 to 100 g of an adhesive 3 for water-based vinyl urethane type wood is spread on the sealer treatment layer on the surface side of the non-combustible substrate 2 by a spreader.
/ M ² coating, overlaying alkaline impermeable sheet 4, cold pressure 5Kg
/ At cm ² by applying about 30 minutes cooling to adhere the alkali electrolyte impervious sheet 4 (see FIG. 7).

Thereafter, as shown in FIG. 8, an SBR (rubber) adhesive 7 is applied to the fibrous sheet 6 on the upper surface of the alkaline impermeable sheet 4 by a spreader at 80 to 100 g / m 2.
^Two coatings, for example, a decorative thin veneer 8 made of natural wood such as zelkova was laminated, and the decorative thin veneer 8 was hot-pressed and bonded by a hot press. Press temperature is 90 ± 10 ℃, press pressure is 5Kg / cm ²
It was 120 ± 30 seconds. The thin laminated veneer 8 can be bonded by cold pressure using water-based vinyl urethane (adhesive), but it requires a long bonding time. Decorative thin veneer 8
Has a wood pattern 8A on the surface and has a thickness of, for example, 0.2 to
The thin one of 0.3mm is used.

When the decorative thin veneers 8 are small, they are continuously arranged. Since the fibrous sheets 6 on both sides of the alkaline impermeable sheet 4 are impregnated with the adhesives 3 and 7, the adhesion of the alkaline impermeable sheet 4 and the adhesiveness of the decorative thin veneer 8 can be made good. Then, a transparent protective coating (topcoat layer) 9 is formed on the surface of the decorative thin veneer 8 by coating a transparent resin coating material having high abrasion resistance such as aminoalkyd resin or acrylic urethane. In this example, 70 g / m
² clear resin paint was applied.

Thus, the decorative interior material 1 of this example is formed. The surface of the decorative interior material 1 is a beautiful one in which the color of the decorative thin veneer 8 and the grain pattern 9A can be clearly seen through the transparent protective layer 9. The decorative interior material 1 of this example is an alkaline impermeable sheet 4
The resin film 5 of the alkaline impermeable sheet 4 prevents the alkaline component of the non-combustible substrate 2 from migrating to the decorative thin veneer 8. This makeup interior material 1
Is 750 ° C because it uses a thick layer of non-combustible substrate 2.
In the "fire protection material test for building materials" that is heated in the electric furnace of No
Was recognized.

The decorative interior material 1 of this example is used for the interior of a building such as a house, like the conventional decorative interior material of this type.

In the above-mentioned embodiment, the sealer treatment is performed on the front and back surfaces of the non-combustible substrate 2 to form the sealer treatment layer. However, depending on the non-combustible substrate 2, the sealer treatment is omitted and the adhesive 3 is directly applied. Good. Further, in the decorative interior material 1 of this embodiment, the transparent protective layer 9 is applied to the upper surface of the decorative thin veneer 8, but the transparent protective layer 9 may be omitted.

[0024]

The invention of claim 1 uses an alkaline impermeable sheet having a structure in which a fibrous sheet impregnated with an adhesive is polymer-bonded on both sides of a resin film that does not allow an alkaline component to permeate. Alkaline components can be prevented from permeating with a resin film, and unlike conventional interior materials, there is no discoloration of the veneered veneer due to alkali contamination, and the veneered veneer can be held beautifully for a long time and has a commercial value. It can be used as a highly nonflammable decorative interior material. Since the fibrous sheets on both sides of the resin film are impregnated with the adhesive, the adhesiveness with the non-combustible substrate and the decorative thin veneer can be made strong. Further, according to the invention of claim 2, since the alkaline impermeable sheet is used, the decorative interior material is manufactured by a simple process of adhering the non-combustible substrate, the alkaline impermeable sheet and the decorative thin veneer with an adhesive. It is possible to implement it on the production line. Since both sides of the alkaline impermeable sheet are fibrous sheets, the adhesive has high adhesiveness, and the noncombustible substrate and the decorative thin veneer have good adhesiveness. The decorative interior material produced by the invention of claim 2 can prevent the penetration of the alkaline component of the non-combustible substrate by the resin film of the alkaline impermeable sheet, so that it can be a beautiful interior material of a decorative thin veneer for a long time. .

[Brief description of drawings]

FIG. 1 is a perspective view of a decorative interior material according to an embodiment of the present invention.

FIG. 2 is a cross-sectional structural view of a decorative interior material of an example of the present invention.

FIG. 3 is a perspective view of a decorative thin veneer used in an example of the present invention.

FIG. 4 is a structural diagram of an alkaline impermeable sheet used in Examples of the present invention.

FIG. 5 is a schematic view of a manufacturing process of an alkaline impermeable sheet.

FIG. 6 is a cross-sectional view of a nonflammable substrate coated with an adhesive.

FIG. 7 is a process diagram of bonding an alkaline impermeable sheet.

FIG. 8 is a bonding process diagram of a decorative thin veneer.

[Explanation of symbols]

 1 Decorative Interior Material 2 Nonflammable Substrate 3,7 Adhesive 4 Alkali Impermeable Sheet 5 Resin Film 6 Fiber Sheet 8 Decorative Thin Veneer

Claims (2)

[Claims] 1. A natural wood decorative interior material comprising an alkaline non-combustible substrate and an alkaline impermeable sheet interposed therebetween to adhere a decorative thin veneer of natural wood, wherein the alkaline impermeable sheet comprises: A non-combustible natural wood decorative material having a structure in which a fibrous sheet impregnated with an adhesive is polymer-bonded to both surfaces of a resin film that does not allow an alkaline component of a non-combustible substrate to penetrate. 2. An alkaline impermeable sheet is adhered onto an alkaline noncombustible substrate with an adhesive, and a decorative thin veneer of natural wood is adhered onto the alkaline impermeable sheet with an adhesive. A method for producing a natural wood decorative material for interior decoration, wherein the alkaline impermeable sheet is impregnated with an adhesive on both sides of a resin film that does not allow the alkaline component of the non-combustible substrate to penetrate. A method for producing a non-combustible natural wood interior material characterized by using a sheet having a structure obtained by polymerizing and bonding fibrous sheets.