JPH10315423A - Decorative sheet and decorative plate trapping formaldehyde and having antibacterial properties - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a decorative plate have a function of trapping formaldehyde and antibacterial properties in the case when a urea adhesive is used for adhesion to a base, by providing a base sheet with a formaldehyde trapping layer, a decorating treatment layer and a surface protection layer and by adding an inorganic antibacterial agent to the surface protection layer. SOLUTION: A decorative plate 10 has a constitution wherein a decorating treatment layer 3 constituted of a solid ink layer 3a and a pattern ink layer 3b is formed on the surface of a base sheet 2 provided on the surface of a base 7 with an adhesive layer 6 interlaid and wherein a surface protection layer 4 formed of hardening resin coating to which an inorganic antibacterial agent is added is laminated on the decorating treatment layer and a decorative sheet 1 having a formaldehyde trapping layer 5 laminated is stuck on the lower side. This plate has properties of trapping formaldehyde released from the base 7 and antibacterial properties in the surface thereof. For the inorganic antibacterial agent 8, a silver-series inorganic antibacterial agent prepared by making silver ions borne on various inorganic substances, e.g. an antibacterial zeolite composition whereon the silver ions are made borne by ion exchange, is used.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a decorative sheet used for various kinds of furniture and building interior materials, and a decorative plate using the same.
The present invention relates to a decorative sheet or a decorative plate which prevents formaldehyde from being released from a substrate.

[0002]

2. Description of the Related Art Conventionally, as this type of decorative sheet, a printed sheet obtained by using paper or a synthetic resin sheet as a base sheet and performing printing on the sheet is used as it is, such as wood plywood,
It is used by attaching a decorative sheet to the surface of a wooden base such as a wood fiber board and a particle board. However,
These wood substrates to which the decorative sheets are bonded are bonded by an adhesive, and an urea-based, melamine-based or resorcinol-based resin adhesive is often used as the adhesive in terms of adhesive performance and cost. However, these adhesives contain free formaldehyde, and formaldehyde is released by decomposition of the resin. Therefore, when a decorative sheet is stuck to such a wooden base material as it is, formaldehyde is emitted into the room or the like. Also, formaldehyde has a strong pungent odor,
It is a toxic substance having a so-called formalin odor, and each of the above-mentioned wood-based substrates emits this formaldehyde and impairs the sanitary environment.

[0003] Also, many proposals have been made as a method for preventing the release of formaldehyde from these woody base materials. For example, measures have been taken such as using a resin that does not contain formaldehyde, such as vinyl acetate resin, or using a urea resin adhesive to which urea that captures formaldehyde has been added. In the case of plywood, there is a problem that the adhesive strength between the layers is insufficient, and in the case of wood fiber board and particle board, there is a problem that physical properties such as strength are changed. When used in an adhesive, there is a problem that the price increases and the physical properties of the finished product may change. Further, when an adhesive such as a urea-based adhesive is used as an adhesive for attaching a decorative sheet to a decorative plate, there is also a problem that formaldehyde may be released from the adhesive.

Therefore, a decorative sheet and a decorative board which are provided with a formaldehyde trapping layer made of an organic amino compound or the like on a decorative sheet and which capture and adsorb the generated formaldehyde and emit formaldehyde to the outside very little have been proposed. As a result, the strong irritating odor due to the release of formaldehyde was eliminated, but when used on the walls and ceilings of closets, kitchens, washrooms, depots, etc. Since it is often used under conditions suitable for propagation of molds and bacteria, there is a problem that molds and bacteria easily propagate on the surface.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide a method for bonding a wooden substrate or a substrate to be bonded with an adhesive. An object of the present invention is to provide a decorative sheet and a decorative board having a function of trapping harmful formaldehyde and having an antibacterial property with respect to an adhesive using a urea-based adhesive.

[0006]

In order to achieve the above object, a solution of the present invention is to provide a decorative sheet having a base sheet provided with a formaldehyde trapping layer, a decoration treatment layer, and a surface protection layer. It is a formaldehyde-capturing decorative sheet having antibacterial properties, which is formed of a curable resin paint to which an inorganic antibacterial agent is added. With such a configuration, formaldehyde generated from the base material or an adhesive used for attaching the decorative sheet to the base material is captured and adsorbed by the formaldehyde capturing layer of the decorative sheet, and therefore, from the surface side. Formaldehyde is less likely to be released, so that the irritating odor due to formaldehyde is extremely reduced, and the surface protective layer of the base sheet is formed of a curable resin paint to which an inorganic antibacterial agent is added. Therefore, antibacterial performance is imparted to the surface of the base sheet, and generation of mold and bacteria can be suppressed.

When the inorganic antibacterial agent has an average particle system of 0.0
It is composed of silver-based inorganic antibacterial agent fine particles in the range of 5 to 0.5 μm, and is 0.5 to 5.
It is characterized by containing 0% by weight. By doing so, the dispersibility of the inorganic antibacterial agent in the curable resin paint becomes good, and after coating, there is no sedimentation of the inorganic antibacterial agent. can do.

Further, a formaldehyde-trapping layer may be provided on one side of the base sheet, and a decoration treatment layer and a surface protection layer may be formed on the other side, and a formaldehyde-trapping layer and a decoration treatment layer may be formed on one side. A configuration in which the surface protective layers are sequentially formed may be employed.

To achieve the above object, the present invention provides:
Further, a formaldehyde-capturing decorative sheet having antibacterial properties, provided with a surface protective layer made of a curable resin paint containing a formaldehyde-trapping layer, a decoration treatment layer, and an inorganic antibacterial agent, is adhered to a substrate. With such a configuration,
Formaldehyde generated from the base material itself or an adhesive used for attaching the base sheet to the base material is trapped and adsorbed by the formaldehyde trapping agent in the formaldehyde trapping layer, so that formaldehyde is hardly released to the surface. . In addition, since the surface protective layer is formed of a curable resin paint to which an inorganic antibacterial agent is added, antibacterial performance is imparted to the surface of the decorative plate, and generation of mold and bacteria can be suppressed.

Further, at least one of formaldehyde-trapping, formaldehyde-impermeable and moisture-proof is provided on the surface opposite to the surface of the substrate on which the formaldehyde-capturing decorative sheet having antibacterial properties is adhered and / or on the side surface of the wood. It may be a decorative plate to which a sheet is attached. This veneer has formaldehyde scavenging and antibacterial properties on one side, and formaldehyde scavenging or formaldehyde impermeable on the other side and / or the side of the wood edge. And the generation of bacteria can be suppressed, and the formaldehyde generated from the base material itself or the adhesive used to attach the base sheet to the base material is captured and adsorbed by the formaldehyde capturing agent in the formaldehyde capturing layer, Since it is blocked by the formaldehyde impermeable layer, the irritating odor due to formaldehyde is very low. Further, the decorative board itself can be prevented from warping due to moisture absorption or release from the back surface of the base material.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view showing a laminated structure of an embodiment of a formaldehyde-capturing decorative sheet having antibacterial properties of the present invention, and FIG. 2 is a cross-sectional view showing a laminated structure of another embodiment of a formaldehyde-capturing decorative sheet having antibacterial properties of the present invention. FIG. 3, FIG. 3 and FIG. 4 are cross-sectional views showing the laminated structure of an embodiment of the formaldehyde-capturing decorative board having antibacterial properties of the present invention, wherein 1 and 1 ′ are formaldehyde-capturing decorative sheets having antibacterial properties, and 2 is a base sheet. , 21 is a thin paper, 22 is a thermoplastic resin layer, 3 is a decoration treatment layer, 3a is a solid ink layer, 3b is a picture ink layer, 4 is a surface protection layer, 5
Is a formaldehyde trapping layer, 6 is an adhesive layer, 7 is a base material,
8 denotes an inorganic antibacterial agent, 9 denotes a backing material layer, and 10 and 20 denote decorative boards.

As shown in FIG. 1, a decorative sheet 3 composed of a solid ink layer 3a and a picture ink layer 3b is laminated on an upper surface of a base sheet 2, as shown in FIG. Inorganic antibacterial agent 8 from above
And a formaldehyde trapping layer 5 on the lower surface, and has antibacterial properties on the surface.

FIG. 2 shows the structure of a formaldehyde-capturing decorative sheet 1 'having antibacterial properties, which is another embodiment of the present invention. The formaldehyde-trapping layer 5, the solid ink layer 3a and the pattern are formed on the upper surface of the base sheet 2. Ink layer 3b
And a surface protective layer 4 formed of a curable resin coating material to which an inorganic antibacterial agent 8 is added.

As the base sheet 2 used in the present invention, for example, thin paper, bleached kraft paper, titanium paper, paperboard,
It consists of a single layer of paper such as gypsum board paper and parchment paper, a plastic film such as a polyethylene film, a polypropylene film, a polyvinyl chloride film, a polyethylene terephthalate film, a polycarbonate film and a nylon film, or a multilayer of two or more types. In particular, thin paper having a weight of 20 to 80 g / m ² is preferably used because it is not only inexpensive but also has a smooth surface, excellent printability, and excellent air permeability.

The base sheet 2 has a solid ink layer 3a of a coloring ink obtained by kneading a pigment or a dye, and a pattern showing a pattern such as wood grain, stone grain, cloth grain, squeezing, characters, and figures. The decoration processing layer 3 such as the ink layer 3b is formed by a normal printing method such as gravure printing, offset printing, and screen printing.

The printing ink for forming the decoration treatment layer 3 may be a single or mixed printing of nitrified cotton / alkyd, cellulose, vinyl chloride, vinyl chloride-vinyl acetate copolymer, acrylic, polyester, polyamide and the like. On the body,
If necessary, a pigment, a coloring agent such as a dye, an extender pigment, a solvent and the like can be appropriately mixed, and a pearl pigment or a metal powder can be used in order to express "glow" of the grain. It is preferable to add a bright pigment such as
In addition, it is not easy to add a formaldehyde scavenger to the printing ink for forming the decoration treatment layer 3.

The formaldehyde trapping layer 5 is made of nitrified cotton / alkyd, cellulose, vinyl chloride, vinyl chloride-
A gravure coat, roll coat, knife is prepared by coating a solvent such as vinyl acetate, acrylic, ester, etc. or an emulsion type vehicle with a formaldehyde scavenging substance and additives, etc. The formaldehyde trapping layer 5 is formed by coating the surface of the base sheet 2 using a coating machine such as a coat.

A typical formaldehyde-scavenging substance that can be used in the present invention is an organic amino compound, which reacts easily with formaldehyde, and its product does not dissociate formaldehyde. For example, urea, ethylene urea, propylene urea, 5-hydroxypropylene urea, 5-methoxy propylene urea, 5-methyl propylene urea, parabanic acid (glyoxal monourein), 4,5-dimethoxy ethylene urea, pyrrolidine , Piperidine, morpholine,
Examples thereof include amines such as dicyandiamide, 2-hydrazobenzothiazole or derivatives thereof, amides, and imides. Further, ammonium hydroxide may be added as needed. Further, the formaldehyde scavenger is silica, talc, clay, activated carbon, zeolite,
It may be supported on an inorganic powder such as sepiolite.

The coating material to which the inorganic antibacterial agent 8 for forming the surface protective layer 4 is added is made of a known thermosetting resin as a vehicle.
An antimicrobial agent is added to the vehicle, and other additives are optionally added, for example, a pigment, a coloring agent such as a dye, an extender, a solvent, a stabilizer, a plasticizer, a curing agent, and the like. Mixtures can be used. As a vehicle for forming the surface protective layer 4, it is desirable to form a film having excellent surface properties such as stain resistance, scratch resistance, and solvent resistance, and it is preferable to form a film such as an unsaturated polyester resin, an epoxy resin, or an acrylic resin. Curable resins and ionizing radiation curable resins are preferred.

Examples of the inorganic antibacterial agent 8 used in the present invention include a silver-based inorganic antibacterial agent having silver ions carried on various inorganic substances, for example, an antibacterial zeolite composition having silver ions carried by ion exchange, and an oxidizing agent. Antibacterial glass with silver added and fused, antibacterial agent with silver ions supported on zirconium phosphate by ion exchange, antibacterial agent obtained by baking after adsorbing and holding silver ions on hydroxyapatite, and magnesium aluminosilicate An antibacterial agent carrying silver ions and the like can be mentioned. In particular, an antibacterial zeolite composition and an antibacterial ceramic can be suitably used. Specific examples of the silver-based inorganic antibacterial agent include commercially available products such as "Zeomic AJ10N" (manufactured by Sinanen Zeomic, zeolite carrying silver ions), and "antibacterial sera coat C01" (antibacterial ceramics manufactured by Shinto V Celax). Available.

The amount of the silver-based inorganic antibacterial agent to be added is in the range of 0.5 to 5.0% by weight, preferably 1.0 to 2.0% by weight, based on the solid content of the curable resin paint. If the addition amount is less than 0.5% by weight, the antibacterial effect tends to decrease. If the addition amount exceeds 5.0% by weight, the effect is not improved and the cost is increased. Further, the silver-based inorganic antibacterial agent to be used, particularly the average particle diameter is 0.05 to 0.5μ
With the use of ultrafine particles in the range of m, the dispersibility in the curable resin paint becomes good, and after coating, there is no sedimentation of the silver-based inorganic antibacterial agent. Can have remarkable antibacterial performance. Especially,
A uniform antibacterial property is exhibited in the uneven portion, and the surface condition also exhibits a uniform luster in the uneven portion, whereby an inorganic decorative plate excellent in antibacterial property and design can be obtained. The particle size of the silver-based inorganic antibacterial agent can be adjusted by wet pulverization in at least one kind of solvent that is familiar with the paint, for example, toluene, methyl ethyl ketone, alcohol, or the like. Therefore, it is possible to supply the topcoat paint in a stable state in which the paint is excellent in dispersibility in the paint and does not settle and solidify even when left standing. Further, as a coating method, a known coating means such as a gravure printing method, a roll coating method, a reverse roll coating method, a sponge roll coating method, or the like can be used.

FIG. 3 shows a first embodiment of a decorative board to which the decorative sheet 1 of the present invention is adhered. Hereinafter, the same reference numerals as those of the already described components are used, and duplicate description will be omitted. The decorative plate 10 has a decorative processing layer 3 composed of a solid ink layer 3a and a pattern ink layer 3b formed on the surface of the base sheet 2 via the adhesive layer 6 on the surface of the base material 7 and an inorganic antibacterial agent formed thereon. A decorative sheet 1 in which a surface protective layer 4 formed of a curable resin paint to which No. 8 is added is laminated, and a formaldehyde capturing layer 5 is laminated on the lower surface;
It has a property of capturing formaldehyde released from the substrate 7 and an antibacterial property on the surface of the decorative board.

FIG. 4 shows a laminated structure of the decorative board 20 according to the second embodiment of the present invention. The decorative board 20 of this embodiment has the same surface configuration as that of FIG. 3, and has a thin paper 21 on both surfaces of the thermoplastic resin layer 22 via the adhesive layer 6 on the lower surface (back surface) of the base material 7.
Is a structure in which a backing material layer 9 having a three-layer structure is adhered, and a sheet having formaldehyde trapping property or formaldehyde impermeability is adhered to the front and back surfaces. Since the thermoplastic resin layer 22 of the backing material layer 9 has a property of hardly permeating formaldehyde and a moisture-proof property, it is possible to prevent the base material 7 from warping due to moisture absorption or moisture release and formaldehyde emission. Although not shown, a formaldehyde-capturing sheet provided with a formaldehyde-capturing agent layer on the upper surface of the thin paper 21 as the backing material layer 9 can be adhered to prevent release of formaldehyde.

The base material 7 on which the decorative sheet of the present invention is bonded is a wood plywood (including a so-called laminated material) using formaldehyde-emitting resin as an adhesive between layers, and a particle board using formaldehyde-emitting resin as a binder. Or a wood fiber board (MDF or the like), and in the present invention, a formaldehyde-emitting resin alone, a compound obtained by kneading or impregnating a formaldehyde-emitting resin with a fibrous material (FRP in a broad sense), or the like. Can also be used.

Examples of a method of laminating these various substrates 7 include a method of laminating a plate-shaped substrate by pressing with a pressure roller via an adhesive, and a method of applying a decorative sheet to the surface of a molded substrate. So-called vacuum press lamination method in which the decorative sheet is laminated on the surface of the molding substrate by a pressure difference due to vacuum suction from the molding substrate side, or a column, a polygonal column, etc. In the long axis direction of the columnar base material, while supplying the decorative sheet through the adhesive layer therebetween, by a plurality of rollers having different directions, the decorative sheet is sequentially pressure-bonded to a plurality of side surfaces constituting the columnar body. There is a so-called lapping method for laminating. Although the decorative sheet of the present invention exerts its effect even when it is applied only to one surface of a wooden base material, it is preferable to apply the decorative sheet to both front and back surfaces of the wooden base material in order to achieve a greater effect.

The adherends whose surfaces are decorated include decorative materials for building interiors such as walls, floors and ceilings, window frames,
It is used as a surface decoration material for fittings such as doors and handrails, and a surface decoration material for furniture such as a chest of drawers.

Examples 1 to 3 A sheet reinforced thin paper weighing 30 g / m ² (“HP-30” manufactured by Tenma Special Paper Co., Ltd.) was used, and a formaldehyde scavenger layer was formed on the upper surface of the thin paper. A sheet for capturing formaldehyde was obtained. The formation of the formaldehyde scavenger layer is performed using a formaldehyde scavenger (FC-18, manufactured by Miki Riken Co., Ltd.).
-6) The aqueous solution containing 5 g / m with a roll coater
² (at the time of drying). Using a nitrocellulose ink (SAM, manufactured by Showa Ink Industries, Ltd., SAM) on the surface of the sheet for capturing formaldehyde obtained above on which the formaldehyde capturing agent layer is not formed, the solid ink layer and the grain pattern are printed by gravure printing. The layer is printed, and a transparent coating obtained by mixing a silver-based inorganic antibacterial agent with a two-part curable acrylic urethane coating is applied to the surface of the wood pattern pattern layer with a roll coater so as to be 10 g / m ² (wet) to protect the surface. A layer was formed, and a decorative sheet having excellent antibacterial formaldehyde trapping properties was produced. At this time, the average particle diameter and the amount of the silver-based inorganic antibacterial agent (% by weight relative to the resin solid content) were varied as shown in Table 1. Next, an MDF of 2.5 mm was prepared as a base material, and the decorative sheet was adhered to one side of the MDF using an ethylene / vinyl acetate adhesive so that the formaldehyde scavenger layer faced the MDF side. A decorative board having excellent formaldehyde scavenging property having

Example 4 A sheet-reinforced paper (weighing 30 g / m ² , HP-30 manufactured by Tenma Special Paper Co., Ltd.) was used, and a formaldehyde scavenger layer was formed on the upper surface of the sheet to capture formaldehyde. Sheet was obtained. The formation of the formaldehyde scavenger layer is performed using a formaldehyde scavenger (FC-18, manufactured by Miki Riken Co., Ltd.).
-6) The aqueous solution containing 5 g / m with a roll coater
² (at the time of drying). Using a nitrocellulose ink (SAM, manufactured by Showa Ink Industries, Ltd., SAM) on the surface of the sheet for capturing formaldehyde obtained above on which the formaldehyde capturing agent layer is not formed, the solid ink layer and the grain pattern are printed by gravure printing. A layer is printed, and a transparent paint obtained by mixing 2.0% by weight of a silver-based inorganic antibacterial agent having an average particle diameter of 0.25 μm with a two-part curable acrylic urethane paint is coated on the surface of the grain pattern layer at a rate of 10 g / m ² (wet). Apply and dry with a roll coater to form a surface protective layer,
A decorative sheet having antibacterial properties and excellent in formaldehyde scavenging properties was produced. Next, a 2.5 mm MD as a substrate
F, prepare the above decorative sheet on one side and the formaldehyde capturing sheet on the other side, and use an ethylene / vinyl acetate adhesive such that the formaldehyde capturing agent layer faces the MDF side. To obtain a decorative plate having excellent antibacterial property and formaldehyde scavenging property.

Comparative Example 1 A decorative plate was obtained in the same manner as in Example 4 except that the silver-based inorganic antibacterial agent was not added to the transparent paint for forming the surface protective layer. Comparative Example 2 A nitrocellulose-based ink (manufactured by Showa Ink Kogyo Co., Ltd.) was used on the upper surface of the thin paper using a paper reinforced thin paper weighing 30 g / m ² (“HP-30” manufactured by Tenma Special Paper Co., Ltd.). , SA
The colored solid ink layer and the wood pattern pattern layer are printed by gravure printing using M), and a two-part curable acrylic urethane paint is applied to the wood pattern pattern layer surface with a roll coater so as to be 10 g / m ² (wet). After coating and drying, a surface protective layer was formed to obtain a decorative sheet. Then, 2.5m as a substrate
m was prepared, and the decorative sheet was adhered to one surface of the MDF using an ethylene / vinyl acetate adhesive to obtain a decorative plate.

The decorative panels prepared in the above Examples and Comparative Examples were subjected to a formaldehyde emission test and an antibacterial test by the following methods, and the results are shown in Table 1.

(Formaldehyde emission test) Twelve 5 × 15 cm sample pieces were cut from the decorative plate, and the twelve sample pieces were placed in a 24 cm diameter desiccator.
300 on the scale at the bottom center of the desiccator
After adding ml of distilled water and allowed to stand at 20 ° C. for 24 hours, the amount of formaldehyde absorbed in the distilled water was measured by an acetylacetone colorimetric method. Table 1 shows the results of measuring the formaldehyde concentration in this manner.

(Antibacterial test) Each test piece (50 × 50 m
m), 0.5 ml of Staphylococcus aureus and Escherichia coli was added dropwise to the solution under 35 ± 1 ° C. and a relative humidity of 90% or more.
The cells were cultured for 4 hours. Thereafter, the surface of the phosphate buffer (10 ml) test piece was washed out, and the number of surviving bacteria per 1 test piece was measured for 1 ml of the washed out solution using a standard agar medium by a pour culture method. It was converted to the number of bacteria. As a control, a test using only the bacterial solution was performed at the same time.

[0033]

[Table 1] As can be seen from the above results, in Examples 1 to 4, good results were obtained in both antibacterial performance and formaldehyde trapping performance. In contrast, Comparative Example 1 has good formaldehyde trapping performance but poor antibacterial performance, and Comparative Example 2 has slightly poor formaldehyde trapping performance and antibacterial performance. As a result, the mold and bacteria to be targeted are not clear, but it is considered that in the case of a decorative panel that easily generates formaldehyde, the formaldehyde had an effect of slightly suppressing the generation of mold and bacteria. It is fully conceivable that the formation of the formaldehyde-trapping layer eliminates such effects and easily causes mold and bacteria. In other words, in this case, a greater antibacterial effect can be expected for a decorative sheet or a decorative plate on which a formaldehyde capturing layer is formed.

[0034]

As described above, the formaldehyde-capturing decorative sheet having antibacterial properties of the present invention is obtained by forming a surface protective layer with a formaldehyde-trapping layer and a curable resin paint containing an inorganic antibacterial agent added to a base sheet. Therefore, the release amount of formaldehyde harmful to the human body released from the base material or the adhesive used for attaching the decorative sheet to the base material can be suppressed, and the surface of the base sheet has antibacterial performance. It is applied and can suppress the generation of mold and bacteria. Therefore, by using the decorative panel to which the formaldehyde-capturing decorative sheet having antibacterial properties is applied as a surface material such as a wall surface or a ceiling surface of a kitchen, a washroom, a depot, a closet, etc., the irritating odor of formaldehyde can be obtained. And can provide antibacterial performance, can suppress the generation of mold and bacteria, and can be maintained hygienically.

Further, the inorganic antibacterial agent to be added to the surface protective layer is a silver-based inorganic antibacterial agent fine particle having an average particle system in the range of 0.05 to 0.5 μm. By containing 0.5 to 5.0% by weight, the dispersibility of the inorganic antibacterial agent in the curable resin paint becomes good, and the inorganic antibacterial agent does not settle after coating. Remarkable antibacterial performance can be imparted to the surface.

Further, an antibacterial formaldehyde-trapping decorative sheet having a surface protective layer formed of a formaldehyde-trapping layer and a curable resin paint to which an inorganic antibacterial agent has been added is laminated on one surface of the substrate with an adhesive. , On the other side, and / or veneer having a formaldehyde-trapping sheet laminated on at least one of formaldehyde-impermeable and formaldehyde-impermeable and moisture-proof sides, have formaldehyde-trapping property on one side, Another one
One side and / or the front side of the wood has formaldehyde trapping or formaldehyde impermeability, so that mold and bacteria can be prevented from being generated on the surface of the decorative board. Formaldehyde generated from the adhesive used to attach the formaldehyde is trapped and adsorbed by the formaldehyde scavenger, or is blocked by the formaldehyde impermeable layer,
Formaldehyde is less likely to be released to the surface, so that the irritating odor due to formaldehyde is very low. Further, it is possible to obtain a decorative board which can prevent the decorative board itself from warping due to moisture absorption or release from the back surface of the base material.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a laminated structure of an embodiment of a formaldehyde-capturing decorative sheet having antibacterial properties of the present invention.

FIG. 2 is a cross-sectional view showing a laminated structure of another embodiment of the formaldehyde-capturing decorative sheet having antibacterial properties of the present invention.

FIG. 3 is a cross-sectional view showing a laminated structure of the first embodiment of the formaldehyde-capturing decorative board having antibacterial properties of the present invention.

FIG. 4 is a cross-sectional view showing a laminated configuration of a second embodiment of a formaldehyde-capturing decorative board having antibacterial properties of the present invention.

[Explanation of symbols]

1, 1 'Formaldehyde-capturing decorative sheet having antibacterial properties 2 Base sheet 21 Paper-based sheet 22 Thermoplastic resin layer 3 Decoration treatment layer 3a Solid ink layer 3b Picture ink layer 4 Surface protective layer 5 Formaldehyde capturing layer 6 Adhesive layer 7 Base Reference Signs List 8 inorganic antibacterial agent 9 backing material layer 10, 20 decorative board

Claims (6)

[Claims] 1. A decorative sheet having a base sheet provided with a formaldehyde trapping layer, a decoration treatment layer, and a surface protection layer, wherein the surface protection layer is formed of a curable resin paint to which an inorganic antibacterial agent is added. Formaldehyde-capturing decorative sheet with characteristic antibacterial properties. 2. The inorganic antibacterial agent has an average particle size of 0.1.
Consisting of silver-based inorganic antibacterial agent fine particles in a range of from 0.5 to 0.5 μm,
The antibacterial formaldehyde-trapping decorative sheet according to claim 1, wherein the decorative sheet contains 5.0% by weight. 3. The antibacterial according to claim 1, wherein a formaldehyde trapping layer is provided on one surface of the base sheet, and a decoration treatment layer and a surface protection layer are formed on the other surface. Formaldehyde scavenging decorative sheet with properties. 4. The antibacterial formaldehyde-trapping cosmetic according to claim 1, wherein a formaldehyde-trapping layer, a decoration treatment layer, and a surface protective layer are sequentially formed on one surface of the base sheet. Sheet. 5. A decorative board comprising the formaldehyde-capturing decorative sheet having antibacterial properties according to claim 1 attached to a substrate. 6. The sheet has at least one of formaldehyde-scavenging property, formaldehyde-impermeable property and moisture-proof property on a surface opposite to a surface of the base material on which the formaldehyde-capturing decorative sheet having antibacterial property is adhered and / or on a side surface of the wood. The decorative board according to claim 5, wherein a sheet is attached.