JPH07232424A - Decorative panel - Google Patents

Abstract

PURPOSE:To obtain a decorative panel stable in quality by laminating a decorative sheet to a base material through an adhesive layer containing luminescent pigment transparent within a visible region and capable of emitting discriminable fluoresence within an ultraviolet region. CONSTITUTION:A decorative panel is constituted by laminating a decorative sheet to a base material 1 through an adhesive layer 2 containing fluorescent pigment 3. Since the adhesive layer 2 containing the fluorescent pigment 3 is provided on the surface of the base material 1, when ultraviolet rays such as black light is applied to the decorative panel, visible light with a specific wavelength is radiated and a layer colorless and transparent in usual illumination emits light of blue, bluish green, yellow or orange to be visually confirmed and the coating state of the adhesive layer can be confirmed on the basis of the intensity or presence of an emitted fluorescent color. Since the adhesive layer 2 is not visually looked because colorless and transparent in a visible light region of solar rays or white light of a fluorescent lamp, even when the light-colored decorative sheet 4 low in concealing power is bonded, no effect is exerted on the hue of the decorative panel.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surface material such as furniture and building material, and more particularly to a decorative board laminated with an adhesive such as flat lamination, curved surface lamination, vacuum press lamination and the like.

[0002]

2. Description of the Related Art Conventionally, a plywood, a wood fiber board, an inorganic board, a pulp cement board, etc. have been used as a substrate, and a decorative sheet such as a resin-coated decorative paper or a synthetic resin decorative film is adhered to this substrate. A veneer that is adhered via an agent is used as a constituent material for various building materials and furniture furniture. As a method of applying the adhesive, for example, a spray coating method, a roll coating method, an air knife coating method, a curtain coating method or the like is applied alone or in an appropriate combination.

However, as a method of confirming the amount or state of application of the adhesive in the step of applying the adhesive, (1) the application amount is measured by weight through a plate of a standard size at the beginning and the end of the coating operation. How to check. (2) A method has been adopted in which a coloring agent is mixed with the adhesive to color the adhesive, and the applied amount is confirmed by the shade of the color. In case of (1),
Since the application state such as uneven application amount and partial application unevenness during work is not known, after the decorative sheet is attached, the decorative sheet peels off due to insufficient adhesive force or partial adhesive unevenness There is a problem that occurs. Further, in the case of (2), when a decorative sheet having a light color tone and a small hiding power is attached, the product color varies depending on the shade of the adhesive layer.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the problems as described above, and an object of the present invention is to provide a product having a low hiding power even when a decorative sheet is attached. An object of the present invention is to provide a veneer with stable quality by using an adhesive that does not affect the color tone.

[0005]

In order to solve the above-mentioned problems, the decorative board of the present invention is a fluorescent pigment which is transparent on the substrate in the visible light region and emits identifiable fluorescence in the ultraviolet light region. It is characterized in that a decorative sheet is laminated via an adhesive layer containing the.

[0006]

In the present invention, as described above, a substrate coated with an adhesive containing a fluorescent pigment that is transparent in the visible light region and emits fluorescence that can be distinguished in the ultraviolet light region,
By making it possible to check the adhesion amount and adhesion state of the adhesive by the density of the fluorescent color emitted by passing under the black light source, or the presence or absence,
The adhesive strength of the decorative plate can be stabilized.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG. 1 is a laminated sectional view of a decorative board according to an embodiment of the present invention, in which 1 is a base material, 2 is an adhesive layer, 3 is a fluorescent pigment, and 4 is a decorative sheet.

As shown in FIG. 1, the decorative sheet of the present invention has a structure in which a decorative sheet 4 is laminated on a base material 1 with an adhesive layer 2 containing a fluorescent pigment 3 interposed therebetween. Since the adhesive layer 2 containing the fluorescent pigment 3 is provided on the surface of the base material 1, when it is irradiated with ultraviolet light such as black light, visible light of a specific wavelength is radiated, and it is colorless and transparent under normal illumination. The layer develops colors such as blue, turquoise, yellow, and orange, which can be visually checked, and the application state of the adhesive can be confirmed by the intensity and presence or absence of the fluorescent color.

The fluorescent pigment 3 used in the present invention includes both an inorganic fluorescent pigment and an organic fluorescent pigment. Inorganic fluorescent pigments include zinc sulfide, zinc silicate, zinc oxide, cadmium zinc sulfide, calcium sulfide, and calcium tungstate. Examples of organic fluorescent pigments include diaminostilbene disulfonic acid derivatives, bisstyrylbiphenyl derivatives, imidazole derivatives, triazole, carbazole, pyridine, naphthalic acid, derivatives such as imidazolone, dyes such as fluorescein and eosin, and compounds having a benzene ring such as anthracene. Used.

The fluorescent pigment 3 is crushed into fine particles of about 1 to 10 μm, added to a resin solution having good transparency and dispersed to form a fluorescent pigment-containing adhesive, and the adhesive layer 2 is formed by various coating methods. Can be formed. The amount of the fluorescent pigment 3 added should be kept to the minimum amount at which fluorescence can be confirmed because the adhesive strength is not reduced, the pot life of the adhesive is not affected, and the physical properties of the fluorescent pigment are high. The amount may be about 1 part by weight with respect to 100 parts by weight of the resin solution.

As the resin system for forming the adhesive layer 2 of the present invention, a phenol resin, a urea resin, a melamine resin, a polyester resin, a polyurethane resin, an epoxy resin, or other thermosetting resin can be used. If necessary, a crosslinking agent such as isocyanate or amine, a polymerization initiator such as methyl ethyl ketone peroxide, hydroperoxide, azobisisobutyronitrile, or a polymerization accelerator such as cobalt naphthenate or dimethylaniline is added. , Polyvinyl acetate, polyvinyl chloride, polyvinyl acetate / vinyl chloride copolymer, ethylene / vinyl alcohol copolymer, ethylene / vinyl acetate copolymer, polyvinyl alcohol, polyvinyl butyral and other vinyl polymers, polyethylene, polypropylene, etc. Polyolefin resin, polyacrylic acid One or more of stell resins, polymethacrylate resins, fibrin nitrate, fibrin acetate, polyamide, ionomers or other thermoplastic resins, butadiene-acrylonitrile rubber, neoprene rubber, or other natural resins. A mixture containing the mixture as a main component and, if necessary, known fillers, stabilizers, solvents, plasticizers, etc., can be used as an adhesive.

As the base material 1 of the present invention, any base material that is usually used as a base material for a decorative board may be used to provide the necessary thickness and strength for a decorative board. Wood veneer such as wood veneer, particle board, resin plate such as polyvinyl chloride, polycarbonate, phenol, iron plate, galvanized steel plate, metal plate such as aluminum plate, lightweight foam concrete plate, calcium silicate plate,
An inorganic board such as an asbestos slate board can be used.

The decorative sheet 4 to be attached to the surface of the substrate may be any one used in the manufacture of conventional decorative boards, such as bleached kraft paper, titanium paper, linter paper, thin paper, and polyethylene film. , Polypropylene film, polyvinyl chloride film, polyethylene terephthalate film, polycarbonate film, acrylic film, and other plastic films. The surface of the film has a wood pattern, stone pattern, or abstract pattern. It can be provided by an ordinary printing method such as screen printing.

When the adhesive layer 2 is irradiated with light of a specific wavelength, the fluorescent pigment in the adhesive reacts and radiates visible light of a specific wavelength. By visually observing this visible light, the amount of adhesive adhered Alternatively, the uniformity of the adhered state can be confirmed. Further, since this adhesive layer 2 is colorless and transparent and invisible in the visible light region such as white light such as sunlight or fluorescent light, the makeup obtained even when a light-colored decorative sheet with little hiding power is attached. It does not affect the color of the board.

The decorative board of the present invention can be manufactured by the following method. MDF molded into a predetermined shape with a thickness of 18 mm
Was used as the substrate. On top of that, as an adhesive layer, an adhesive in which a fluorescent pigment diaminostilbenedisulfonic acid compound is mixed and dispersed in a two-component curing type urethane resin emulsion solution is applied by a spray coating machine so that the adhesive becomes 50 g / m ² (when dried) To do. After coating, the substrate is brought under a black light source (a distance of about 1 m from the light source) to emit light, thereby confirming coating unevenness.

On the adhesive layer thus provided, a separately prepared 0.16 mm thick wood grain vinyl chloride sheet was placed and pressed with a curved laminator (vacuum press) for a pressing time of 120 seconds and a pressing temperature. It was molded under the conditions of 65 ° C. (surface temperature) and a pressing pressure of 3 kg / cm ² to obtain a wooden decorative board.

[0017]

As described above, by using the adhesive containing the fluorescent pigment, it becomes possible to reliably check the applied state of the adhesive visually under the light source of the black light, and the decorative board of stable quality can be obtained. Can be obtained. Further, under natural light or ordinary illumination, a highly designed decorative plate which does not affect the color tone of the decorative sheet having a low hiding power because the adhesive layer is transparent was obtained.

[Brief description of drawings]

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

[Explanation of symbols]

 1 Base Material 2 Adhesive Layer 3 Fluorescent Pigment 4 Decorative Sheet

Claims (1)

[Claims] 1. A decorative sheet is laminated on a base material via an adhesive layer containing a fluorescent pigment that is transparent in the visible light region and emits fluorescence that is distinguishable in the ultraviolet light region. Veneer to be.