JP2630342B2 - Decorative plate and manufacturing method thereof - 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 board capable of improving its nonflammability without impairing its woody feel, and a method of manufacturing the same.

[0002]

2. Description of the Related Art In recent years, wood materials have been preferred as building materials and building materials, but their use is limited because wood is flammable. In particular, wood cannot be used as it is in places subject to interior restrictions under the Building Standards Law. For this reason, a composite material is used in which an inorganic plate, which is a non-combustible material or a semi-combustible material, is used as a substrate, and a veneer, that is, a wooden decorative veneer is adhered to the surface thereof.

[0003]

In this composite material, even though it is cut into a thin plate, the wood veneer itself is not subjected to any non-combustible treatment. The fire prevention performance of the substrate deteriorates, and the use of a non-combustible material as a substrate is reduced to a quasi-non-combustible material, and the use of a quasi-non-combustible material as a substrate is reduced to a fire-resistant material. This problem can be solved by treating the wood veneer with a fire retardant.However, since the fire retardant is expensive, it causes an increase in cost, and there is a problem such as an unpleasant odor or discoloration after the treatment with the fire retardant. The above solution was difficult to adopt.

[0004]

SUMMARY OF THE INVENTION In view of the above-mentioned problems of the prior art, the present inventor has conducted extensive studies on a decorative board and a method of manufacturing the same, which can improve fire prevention performance without impairing the feeling of wood. Thus, the present invention has been completed.

[0005] That is, the decorative board according to the present invention is a wooden veneer having a grain composed of a spring wood part and an autumn wood part, and a non-combustible inorganic compound is applied to the inside of the cell hole and / or the inside wall of the cell hole of the spring wood part. Is filled or fixed, a wood veneer, via an adhesive,
The spring material is attached to the surface of the inorganic plate,
It is characterized by being formed as .

Further, according to the method for producing a decorative board according to the present invention, a wood veneer having a grain composed of a spring wood part and an autumn wood part is obtained by cutting a raw wood, and the obtained wood veneer is treated with an aqueous solution of an inorganic salt. By impregnating only the spring material portion with the aqueous solution of the inorganic salt, and immersing the wooden veneer in a compound solution that reacts with the inorganic salt to produce a water-insoluble incombustible inorganic compound. After the incombustible inorganic compound is filled or fixed in the cell hole and / or the inner wall surface of the cell hole in the spring material portion of the veneer, it is dried to form a noncombustible wood veneer, and the obtained noncombustible wood is obtained. both the veneer is adhered to the surface of the inorganic plate via the adhesive agent, grinding the surface of the wood veneer in a step
The spring material portion is formed as a recess .

The method for producing a decorative board according to the present invention will be described in detail below. First, a wood veneer is obtained by rotating a wood or flitch of wood such as cedar, pine, maple, toga, cypress and the like with a rotary lace, a half rotary lace, a slicer. It is obtained by cutting using a cutting device such as that described above, and has a grain composed of a spring lumber part and an autumn lumber part. In general, the spring wood part has large cells and the cell wall is thin and soft, whereas the autumn wood part has small cells and the cell wall is thick and hard. Therefore, the spring material has a low density, is easily ignited by a flame, and has a fast burning rate. vice versa,
The autumn wood has a high density, is difficult to ignite against a flame, and has a slow burning speed. Although the difference in density between the spring lumber and the autumn lumber differs depending on the tree species, the autumn lumber is generally 2 to 3.4 in comparison with the spring lumber.
It has twice the density. Further, the wood veneer has cell pores composed of cells and conduit grooves, and the cell pores are opened on the surface thereof.

[0008] The wood veneer cut into a thin plate is dried and adjusted to a water content of about 7 to 15%.

Next, the surface of the wooden veneer is polished by brushing, sandblasting or the like, and only the spring material portion is ground to form a concave portion.

Next, the wood veneer is immersed in an aqueous solution of an inorganic salt (hereinafter referred to as "first liquid") to impregnate only the spring portion of the grain with the first liquid. As described above, the spring material has a low density, so that the first liquid easily penetrates, whereas the autumn material having a high density does not easily penetrate the first liquid. Therefore, the impregnation method and impregnation time may be appropriately adjusted. It is easy to impregnate only the spring material portion with the first liquid by adjusting. The impregnation time is appropriately adjusted depending on conditions such as the type of wood veneer, the thickness of the board, the impregnation method, and the like, but generally about 30 minutes to 6 hours is sufficient.

When impregnating the first liquid, it is effective to apply a reduced pressure or an increased pressure to forcibly accelerate the impregnation. Further, the wooden veneer is kept in a high water content state without drying, or after being dried, immersed in water or warm water to absorb water and made saturated, and then immersed in the first liquid for diffusion and impregnation. May be.

As the first liquid, MgCl ₂ , MgB
r ₂ , MgSO ₄ .H ₂ O, Mg (NO ₃ ) ₂ .6H ₂
O, AlCl ₃ , AlBr ₃ , Al ₂ (SO ₄ ) ₃ , A
_{l (NO 3) 3 · 9H} 2 O, CaCl 2, CaBr 2,
Ca (NO ₃ ) ₂ , ZnCl ₂ , BaBr ₂ , BaCl
_{2 · 2H 2 O, Ba (} NO 3) an aqueous solution of _2, and the like. By impregnating and impregnating the wooden veneer with the first liquid, the ions of the solute inorganic salts enter the cell holes in the spring material portion of the wooden veneer by diffusion.

Next, a dewatering process is performed to remove the excess first liquid. The liquid removal treatment is performed by, for example, centrifugal liquid removal, showering, or soaking in soaked water. By removing excess first liquid, excessive inflammable inorganic compounds are generated on the surface of the wooden veneer. And to improve the diffusion and impregnation of the aqueous solution to be subsequently impregnated. Further, it is possible to prevent the generation of the nonflammable inorganic compound in a free state that is not attached or fixed to the wooden veneer. After the liquid removal treatment, the component crystals of the first liquid deposited on the surface are removed as necessary.

Next, a compound liquid which reacts with the first liquid to form a water-insoluble incombustible inorganic compound (hereinafter referred to as “second liquid”)
Liquor) to a wooden veneer using a blender, a spray, or the like, and mixing or immersing the wood veneer.
The liquid is impregnated into the wood veneer. As in the case of the first liquid, the impregnation of the wooden veneer with the second liquid can be promoted by decompression or pressure treatment. As the second liquid, Na ₂
CO ₃ , H ₂ SO ₄ , (NH ₄ ) ₂ CO ₃ , Na ₂ SO
₄ , (NH ₄ ) ₂ SO ₄ , H ₂ PO ₄ , Na ₂ HP
O ₄ , (NH ₄ ) ₂ HPO ₄ , H ₃ BO ₃ , NaB
O ₂ and NH ₄ BO ₂ are exemplified. By applying or immersing the second liquid, the second liquid is diffused and impregnated into the cell pores in the spring material portion of the wooden veneer, and the first liquid and the second liquid react in the wooden veneer, and are incombustible. An inorganic compound is produced. Examples of the generated nonflammable inorganic compounds include calcium compounds such as magnesium phosphate, calcium phosphate, barium phosphate, aluminum phosphate, magnesium borate, magnesium carbonate, calcium carbonate, zinc phosphate, barium carbonate, calcium nitrate, and barium nitrate. , Magnesium compounds, aluminum compounds, barium compounds, lead compounds, zinc compounds, silicate compounds and the like. For example, when barium chloride is used as the first liquid and ammonium hydrogen phosphate is used as the second liquid, barium cation and phosphoric acid anion react to form barium phosphate and barium hydrogen phosphate. Is done.

After the completion of the reaction, an excess second liquid is removed by a dewatering treatment by means such as centrifugal dewatering or washing with water such as shower or soaking. The immersion treatment and the liquid removal treatment of the second liquid may be repeatedly performed as necessary. After the dewatering treatment, it is dried to have a water content of 25% or less, preferably 7 to
15%. Since this incombustible inorganic compound is water-insoluble, it fills or adheres to or adheres to the inside of the cell hole or the inner wall surface of the cell hole in the spring material portion of the wooden veneer after drying. As a result, the non-combustible inorganic compound is present in a form that blocks or fills the voids and cracks that appear on the surface of the wooden veneer. The non-combustible inorganic compound fixed or adhered to the surface of the decorative veneer is arbitrarily removed by means such as brushing or vacuuming.

In order to increase the reaction efficiency of the first liquid and the second liquid, the addition and mixing of the second liquid is preferably performed in a heated atmosphere, particularly at a temperature of 40 ° C. or higher, more preferably 50 ° C. or higher. When the first liquid and the second liquid are in a warm water state and a wooden veneer is immersed in the state, or when the first liquid and the second liquid are immersed, electric or mechanical vibration is given by an ultrasonic wave or a vibrator. The diffusion and reaction of the treatment liquid into the wood veneer are performed favorably. The order of treatment with the first liquid and the second liquid does not matter, and the treatment with the second liquid may be performed first.

In this manner, the noncombustible inorganic compound is filled or fixed in the cell hole and / or the inner wall surface of the cell hole in the spring material portion of the wooden veneer, and the spring material portion is formed as a recess. A plate is obtained. If necessary, the non-combustible wood veneer may be reinforced by adhering an optional backing paper such as Japanese paper, nonwoven fabric, synthetic fiber paper, synthetic fiber paper, or synthetic paper to the back surface.

In the above method, the spring material portion is ground before the chemical treatment with the first and second liquids. However, after the chemical treatment with these materials, the material is first treated with a high water content or dried. In the later state of low water content, a concave portion may be formed by grinding a part of the spring material portion having a small density by brushing or rough sanding the surface.

The incombustible wood veneer thus obtained is adhered to the surface of the inorganic plate via an adhesive. As the inorganic plate, a cement plate, a calcium silicate plate, an asbestos slate plate, a gypsum plate, a pulp cement plate, a slag cement plate, a pearlite plate, a metal plate and the like are used. An adhesive is applied to the surface of the inorganic plate by a coating device such as a spreader, a flow coater, or a spray. As the adhesive, urea resin, melamine resin, isocyanate, urethane resin,
Synthetic resin adhesives such as epoxy resin, vinyl acetate resin, phenol resin and modified resins thereof are suitably used. At this time, if a non-combustible inorganic compound of the same or different kind as that produced by the reaction between the first liquid and the second liquid is mixed into the adhesive in advance and used, the fireproof performance as a decorative board is further improved. It is preferable because it can be used. After laminating the non-combustible wood veneer on the inorganic plate coated with the adhesive,
Press-bonding is performed by a pressing device such as a hot press or a cold press. If necessary, a non-combustible or untreated wood veneer is similarly adhered to the back surface of the inorganic plate.

In this way, the decorative board of the present invention, in which the non-combustible wood veneer is adhered to the surface of the inorganic board via the adhesive, is obtained. The surface of the decorative board is optionally coated as needed.

[0021]

The decorative board according to the present invention is made of a substrate made of an inorganic board and a wooden veneer adhered to the surface thereof, and has an aching surface finish with excellent woody feel. Inorganic plates with excellent fire-prevention performance are used as substrates, and even in the case of wooden veneers, the firewood is easily ignited due to its low density and the spring material with a fast burning rate is treated to be non-combustible. A decorative plate with excellent performance can be obtained. Further, the non-combustible treatment of the wooden veneer can be completed in a short time because only the spring material portion needs to be non-combustible.

Claims (4)

(57) [Claims] 1. A wood veneer having a grain consisting of a spring wood part and an autumn wood part, wherein a non-combustible inorganic compound is filled or fixed in the cell hole and / or the inner wall surface of the cell hole of the spring wood part. comprising wood veneer, via an adhesive, both the composed is adhered on the surface of the inorganic plates, decorative plates, characterized in that該春material portion is formed as a recess. 2. A wood veneer having a grain composed of a spring lumber part and an autumn lumber part is obtained by cutting a log, and the obtained wood veneer is immersed in an aqueous solution of an inorganic salt. Only the inorganic salt aqueous solution is impregnated, and the wooden veneer is immersed in a compound solution that reacts with the inorganic salt to produce a water-insoluble incombustible inorganic compound. After the incombustible inorganic compound is filled or fixed in the pores and / or the inner wall surfaces of the cell pores, it is dried to form a noncombustible wood veneer, and the obtained noncombustible wood veneer is coated with an inorganic material via an adhesive. both when stuck on the surface of the plate, wood during step single
Method for manufacturing a decorative laminate, characterized and this <br/> to form the spring member portion by grinding the surface of the plate as a recess. 3. A non-flammable due to the formation of the non-combustible inorganic compound
The method for manufacturing a decorative board according to claim 2 , wherein after performing the treatment, the surface of the wooden veneer is ground to form the spring material portion as a recess. 4. A non-combustible material due to the formation of the non-combustible inorganic compound
Before the treatment, the surface of the veneer is ground to
3. The method for producing a decorative panel according to claim 2, wherein the decorative panel is formed as a concave.
Law.