JPH11207915A - Decorative sheet and decorative board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a decorative sheet with an imparted harmful formaldehyde scavenging function by adding a formaldehyde scavenger to at least, a surface protecting layer. SOLUTION: This decorative sheet 1a comprises a decoratively treated layer 3 made up of a solid ink layer 3a and a pictorial pattern ink layer 3b and a surface protecting layer 4 laminated on the upper surface of a base material sheet 2, and the surface protecting layer 4 contains a formaldehyde scavenger. The formaldehyde scavenger contained in the surface protecting layer 4 is mostly an organic amino compound. A formaldehyde scavenging substance may be used in such a state that it is borne by inorganic particles such as silica. In the construction as described above, it is possible to impart a formaldehyde scavenging function to the decorative sheet 1a only as an essential construction requirement. Consequently, the formaldehyde to be generated from an adhesive used for a base material or the lamination of the decorative sheet 1a to the base material, or from other members present indoors can be scavenged or adsorbed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a decorative sheet or veneer used for various kinds of furniture or interior materials of a building, and captures formaldehyde released from a base material or other indoor members. The present invention relates to a decorative sheet or a decorative plate having a function of performing

[0002]

2. Description of the Related Art Conventionally, as a decorative sheet of this type, a paper or synthetic resin sheet is used as a base sheet, and a printed sheet obtained by performing printing on the sheet is used as it is, and is bonded to the surface of an adherend. Used as a decorative board. However,
There are many adherends to which a decorative sheet is attached, in which a material that generates formaldehyde is used. For example, an adhesive for forming wood plywood, particle board, wood fiber board (mainly MDF), etc., F
A formaldehyde generating substance such as a urea resin is used for the resin constituting the RP or the resin constituting the resin base itself. Therefore, if the printing sheet is simply stuck to such an adherend, formaldehyde is released into the room or the like, which impairs the hygiene environment in the room.

[0003]

Therefore, many proposals have been made as a method for preventing the release of formaldehyde from these adherends. For example, measures have been taken to use a formaldehyde-free resin such as a vinyl acetate resin, or to add a formaldehyde-trapping substance consisting of an organic amino compound to a formaldehyde-generating resin such as a urea resin. However, since the resin containing no formaldehyde has a low adhesive strength, in the case of plywood, there is a problem that the interlayer adhesive strength becomes insufficient (particularly, the initial adhesive strength is weak). In such a case, there is a problem that physical properties such as strength are changed. In addition, when a formaldehyde scavenger is used by adding it to the adherend itself, the price increases and
There is also the problem that the physical properties of the finished product may change. There is also a problem that formaldehyde may be released from an adhesive for attaching a decorative sheet to a decorative plate.

[0004] The present invention has been made in view of the above problems, and an object of the present invention is to provide a decorative sheet having a harmful formaldehyde trapping function and a decorative plate to which the decorative sheet is attached. It is in.

[0005]

Means for Solving the Problems To achieve the above object, a solution of the present invention is to provide a decorative sheet having a decorative sheet and a surface protective layer formed on one side of a base sheet, wherein at least the surface protective layer is provided. The purpose is to provide a decorative sheet in which a layer contains a formaldehyde scavenger. By doing so, only the essential components of the decorative sheet that can provide the required surface properties are generated from the base material, the adhesive used to attach the decorative sheet to the base material, and other members existing indoors. To capture and adsorb formaldehyde, reducing the amount of formaldehyde present indoors,
Or it can be eliminated.

[0006] Further, by forming a decorative sheet having a formaldehyde capturing layer containing a formaldehyde capturing agent between the substrate sheet and the decorative treatment layer or on the other surface of the substrate sheet, the decorative sheet can be further treated from the surface. Alternatively, the effect of capturing and adsorbing formaldehyde from the substrate sheet side can be enhanced.

When the base sheet is a decorative sheet made of a paper-based sheet, the base sheet has air permeability, and captures and adsorbs formaldehyde generated from the base material. Since the possibility of release is reduced, the formaldehyde capturing agent can be more effectively captured and adsorbed, the release to the surface can be reduced, and the amount of formaldehyde existing indoors can be further reduced. Also, the attachment to the substrate can be easily performed by using an emulsion solution or the like.

[0008] By forming the decorative sheet made of a resin in which the surface protective layer is bonded to urethane by an isocyanate group, it has surface properties effective as a decorative sheet such as abrasion resistance, water resistance, stain resistance and chemical resistance. Is what you can do.

In addition, the formaldehyde scavenger contained in the surface protective layer made of a resin that is urethane-bonded by an isocyanate group is formed by supporting a formaldehyde scavenger on inorganic particles to form the surface protective layer. Disperses reliably in the state of the solution, it becomes possible to form a uniform coating, so capture formaldehyde,
Since it can be adsorbed and the formaldehyde scavenger can be exposed from the surface protective layer, it is possible to obtain stable formaldehyde scavenging and adsorption performance.

Further, by using silica as the inorganic particles, it is possible to add a larger amount of a formaldehyde scavenger into a solution or an ink, so that the formaldehyde scavenging and adsorption performance can be enhanced.
Further, since the surface protective layer itself is not colored, it is easy to use, and since the particles can be formed relatively small, it is possible to increase the surface area exposed from the surface protective layer. Excellent trapping and adsorption performance can be achieved. In addition, by using sulfanilic acid as the formaldehyde trapping substance, the substance can be easily supported on inorganic particles, and a sufficient effect of trapping and adsorbing formaldehyde can be obtained.

[0011] Further, by forming the decorative sheet as a decorative sheet in which the surface on which the surface protective layer is not formed is adhered to a base material, surface physical properties which are necessary requirements for a decorative sheet can be obtained. Reduce or eliminate the amount of indoor formaldehyde to capture and adsorb the adhesive used to attach the decorative sheet to the material or base material, and formaldehyde generated from other indoor members. Can be.

Further, a decorative plate may be formed in which a layer having at least one of formaldehyde trapping property, formaldehyde impermeable property and moisture proof property is formed on the side opposite to the surface on which the decorative sheet is stuck. This decorative board has formaldehyde trapping property on one side and formaldehyde trapping property or formaldehyde impermeability on the other side, so it is used for attaching a decorative sheet to a base material or a base material Formaldehyde generated from the adhesive is trapped and adsorbed by the formaldehyde trapping agent in the formaldehyde trapping layer, or is blocked by the formaldehyde impermeable layer, so that formaldehyde is not released to the surface. Therefore, the irritating odor due to formaldehyde is extremely reduced. Further, the decorative board itself can be prevented from warping due to moisture absorption or release from the back surface of the base material.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. 1 to 3 are cross-sectional views showing a laminated structure of an embodiment of the decorative sheet of the present invention, and FIGS.
FIG. 5 is a cross-sectional view showing the laminated structure of the embodiment of the decorative board of the present invention, wherein 1a, 1b, 1c are decorative sheets, 2 is a base sheet, 3 is a decoration treatment layer, 3a is a solid ink layer, and 3b is a pattern. Ink layer, 4 is a surface protective layer, 5 is a formaldehyde trapping layer, 6 is a base material, 7 is an adhesive layer, 8 is a moisture-proof layer, 8a is a thermoplastic resin layer, 8b is thin paper, and 10 and 20 are decorative boards, respectively. Represents.

As shown in FIG. 1, the decorative sheet 1a according to the present invention has a decorative treatment layer 3 and a surface protection layer 4 comprising a solid ink layer 3a and a picture ink layer 3b on the upper surface of a base sheet 2.
The surface protective layer 4 contains a formaldehyde scavenger. By adopting such a structure, it is possible to trap and adsorb formaldehyde.

As shown in FIG. 2, the decorative structure of the decorative sheet according to the second embodiment of the present invention comprises a formaldehyde trapping layer 5, a solid ink layer 3a and a picture ink layer 3b on the upper surface of a base sheet 2. A configuration in which the treatment layer 3 is laminated and a surface protective layer 4 containing a formaldehyde scavenger is provided thereon, or as shown in FIG. 3, on the side opposite to the surface protective layer 4 of the decorative sheet 1a shown in FIG. With the configuration provided with the formaldehyde capturing layer 5, further,
It is characterized by improved formaldehyde trapping and adsorption effects.

The base sheet 2 used in the present invention includes, for example, tissue paper, bleached kraft paper, titanium paper, paperboard,
It is composed of a single layer of paper such as gypsum board paper, polyethylene film, polypropylene film, polyvinyl chloride film, polyethylene terephthalate film, plastic film such as polycarbonate film, nylon film or a plurality of layers of two or more types. The thin paper having a thickness of 20 to 80 g / m ² is not only inexpensive but also can be easily attached to a base material by using an emulsion adhesive. These are also preferred in that they are excellent in coating suitability and excellent in air permeability.

Further, the base sheet 2 is provided with a solid color layer made of a colored ink by mixing a pigment or a dye, for example,
Grain printing, offset printing, screen, and the like are provided with a pattern printing layer that exposes patterns such as wood grain, stone grain, cloth grain, leather squeezing, characters, and figures, and a decoration processing layer 4 such as a transparent resin layer for protecting these printing layers. It is formed by a normal printing method such as printing. The printing ink for forming the decoration treatment layer 4 includes nitrified cotton / alkyd, cellulose, vinyl chloride, salt-
A resin-based binder resin, such as vinyl acetate, acrylic, or acrylic polyol, is used. It is preferable to add a functional pigment.

Next, the outermost surface of the decorative sheet of the present invention or the decorative plate adhered to the base material is made of a transparent resin in order to protect it from the effects of abrasion, water, chemicals and the like. The surface protection layer 4 is formed. Examples of the resin used include a cellulose resin, an acrylic resin, a two-component cured polyurethane resin, an unsaturated polyester resin, an epoxy resin, and a fluororesin. When the protective layer is formed, it can have surface properties effective as a decorative sheet such as abrasion resistance, water resistance, stain resistance, and chemical resistance.

Here, a typical formaldehyde scavenger contained in the surface protective layer is mainly an organic amino compound, and this compound easily reacts with formaldehyde, and its product does not dissociate formaldehyde. Harmless and stable substances such as amides such as dicyandiamide and urea, ethylene urea, propylene urea,
-Hydroxy propylene urea, 5-methoxy propylene urea, 5-methyl propylene urea, cyclic alkylene urea such as parabanic acid (glyoxal monoureylene), 4,5-dimethoxy ethylene urea, and saturated cyclic secondary such as pyrrolidine, piperidine, and formolin. Examples include amines, 2-hydrazobenzothiazole or derivatives thereof, amines such as sulfanilic acid, and acid imides. In addition, ammonium hydroxide may be added if necessary.Furthermore, the above-mentioned formaldehyde trapping substance can be used as a substance supported on inorganic particles such as silica, talc, clay, zeolite and sepiolite. It is.
For example, in the case of a surface protective layer made of a two-component cured polyurethane resin that is urethane-bonded with an isocyanate group that is suitable as the surface protective layer of the decorative sheet described above, a formaldehyde scavenger in which sulfanilic acid or the like is supported on silica is used. Thereby, the effect can be sufficiently exhibited, and the formaldehyde trapping layer
In combination with the above, the formaldehyde trapping effect is further increased.

The formaldehyde-trapping layer 5 is formed on the base sheet 2 by coating the above-mentioned formaldehyde-trapping agent with a solution containing these formaldehyde-trapping agents in a usual gravure coat, roll coat, knife coat or the like. Is formed by coating on the surface of the base material sheet 2 using a coating machine of (1). As a binder for kneading these formaldehyde scavengers, for example, a cellulose-based resin, a vinyl-based resin, a polyester-based resin, a polyamide-based resin, and the like, alcohol, ethyl acetate, an organic solvent such as toluene is appropriately added, and if necessary. What added other additives can be used. The surface protective layer 4
As in the case of the above, the width of the binder to be kneaded can be increased by using a material supported on inorganic particles such as silica, talc, clay, zeolite, and sepiolite. Further, in the above-described embodiment, the case where the coating is performed on only one surface is described. However, a configuration in which the capturing and adsorption effects are further enhanced by forming the coating on both surfaces may be adopted.

Although not specifically described here, the formaldehyde trapping layer 5 is formed on the decoration treatment layer 3, preferably the solid ink layer 3a, formed on the upper surface of the base sheet 2 in the same manner as the formaldehyde trapping layer 5 is formed. By incorporating a scavenger, it is possible to achieve a formaldehyde scavenging effect.

Formaldehyde capturing sheet 1 of the present invention
FIG. 4 shows a laminated structure of the decorative board 10 according to the first embodiment of the decorative board to which b is attached. Hereinafter, the same reference numerals as those of the already described components are used, and duplicate description will be omitted. The decorative plate 10 is formed by laminating a formaldehyde trapping layer 5 and a decorative treatment layer 3 composed of a solid ink layer 3a and a pattern ink layer 3b on the upper surface of the substrate sheet 2 via an adhesive layer 7 on the surface of the substrate 6 and from above. The decorative sheet 1b provided with the surface protective layer 4 containing a formaldehyde scavenger is adhered to obtain the necessary surface physical properties as a decorative board, and to adhere the decorative sheet to the base material or the base material. Since the adhesive used and formaldehyde generated from other members existing indoors are captured and adsorbed, the amount of formaldehyde existing indoors can be reduced or eliminated.

FIG. 5 shows a laminated structure of a decorative plate 20 according to a second embodiment of the decorative plate of the present invention. Decorative plate 20 of the present embodiment
4 has a three-layer moisture-proof layer 8 in which thin paper 8b is adhered to both surfaces of a thermoplastic resin layer 8a via an adhesive layer 7 on the lower surface (back surface) of the base material 6 in the same surface configuration as in FIG. Shows what you wore. Here, since the thermoplastic resin layer 8a has a property of hardly permeating formaldehyde and has a moisture-proof property, it is possible to simultaneously prevent the base material 6 from warping due to moisture absorption or moisture release and formaldehyde emission.

Further, by applying a solution containing the above-mentioned formaldehyde scavenger to the thin paper 8b or the like on the side of the base material 6, it is of course good to have a formaldehyde scavenging effect, and furthermore, if necessary. Alternatively, an antibacterial agent, an antifungal agent, or the like may be added to a layer other than the base material of the decorative sheet or decorative plate of the present invention, so as to have the required performance. Further, the film may have a moisture-proof property and a formaldehyde-scavenging property formed by a coating film.

The base material 6 to which the decorative sheets 1a, 1b and 1c of the present invention are bonded is a wood plywood (including a so-called laminated material) using a formaldehyde-emitting resin as an interlayer adhesive, and a formaldehyde-emitting resin as a binder. Wood fiber board (MDF etc.) or particle board, etc. In addition, in the present invention, a compound obtained by kneading or impregnating a formaldehyde-emitting resin alone or a formaldehyde-emitting resin with a fibrous material (in a broad sense) FR
P) can also be used.

In the first and second embodiments of the decorative plate, the method of laminating each plate to the base material includes, for example, (1) applying a pressure roller to the plate base material with an adhesive interposed therebetween. (2) a decorative sheet is opposed to or placed on the surface of the base material with an adhesive layer therebetween, and the decorative sheet is stacked on the surface of the base material by a pressure difference due to vacuum suction from the base material side (3) A plurality of columns each having a plurality of differently oriented rollers while supplying a decorative sheet in the longitudinal direction of a columnar substrate of a columnar or polygonal column layer through an adhesive layer therebetween. There is a so-called lapping method in which decorative sheets are sequentially adhered to the side surfaces under pressure and laminated. The decorative board of the present invention is the first
Although an effect can be obtained even when the substrate is simply applied to only one surface of the substrate as shown in the second embodiment, in order to achieve a greater effect, the front and back surfaces of the substrate having the configuration as shown in the second embodiment are required. It is preferable to stick on both sides.

Example 1 A paper-reinforced ink (HP-30, manufactured by Tenma Special Paper Co., Ltd.) weighing 30 g / m ² was used, and a cellulose-based ink (Showa Ink Kogyo Co., Ltd.) was applied to the upper surface of the thin paper. ) Made "S
AM ") to print a colored solid ink layer and a wood grain pattern by gravure printing to form a decoration treatment layer, and a two-component curable polyurethane resin paint (manufactured by The Inktech Co., Ltd.) on the decoration treatment layer "KR-92") was coated with a paint obtained by adding 20% of a formaldehyde scavenger composed of silica-based inorganic particles carrying sulfanilic acid to 3 g / m ² (at the time of drying), and dried to form a formaldehyde scavenger. A decorative sheet A was obtained by forming a containing surface protective layer.

Example 2 A paper reinforced thin paper weighing 30 g / m ² (“HP-30” manufactured by Tenma Special Paper Co., Ltd.) was used, and a formaldehyde scavenger (manufactured by Miki Riken Co., Ltd.) was placed on the upper surface of the thin paper. "C-6
Acrylic-cellulose-based paint containing 24% of “3”) (“FC Coating Solution [C]” manufactured by The Inktech Co., Ltd.)
The 2 g / m ² was coated so as to (dry) to form a formaldehyde scavenger layer, cellulosic inks (Showa Ink Kogyosho the upper surface of the formaldehyde scavenger layer Corporation
A solid-colored ink layer and a wood pattern are printed by gravure printing using "SAM" manufactured by Co., Ltd. to form a decoration treatment layer, and a two-component curable polyurethane resin paint (The Inktec Co., Ltd.) is formed on the decoration treatment layer. KR-92), coated with a 20% formaldehyde scavenger consisting of silica-based inorganic particles carrying sulfanilic acid, coated at 3 g / m ² (when dry), dried, and trapped formaldehyde A decorative sheet B was obtained by forming a surface protective layer containing the agent.

Example 3 A paper reinforced thin paper weighing 30 g / m ² (“HP-30” manufactured by Tenma Special Paper Co., Ltd.) was used, and a formaldehyde scavenger (manufactured by Miki Riken Co., Ltd.) was placed on the upper surface of the thin paper. "C-6
Acrylic-cellulose-based paint containing 24% of “3”) (“FC Coating Solution [C]” manufactured by The Inktech Co., Ltd.)
The 2 g / m ² was coated so as to (dry) to form a formaldehyde scavenger layer, cellulosic inks (Showa Ink Kogyosho the upper surface of the formaldehyde scavenger layer Corporation
A solid-colored ink layer and a wood pattern are printed by gravure printing using "SAM" manufactured by Co., Ltd. to form a decoration treatment layer, and a two-component curable polyurethane resin paint (The Inktec Co., Ltd.) is formed on the decoration treatment layer. KR-92), to which 15% of sepiolite-based inorganic particles supporting sulfanilic acid, which is a formaldehyde-trapping substance, was added and dried at 3 g / m ² (at the time of drying). Was formed to form a decorative sheet C.

Comparative Example 1 A paper-reinforced ink (HP-30, manufactured by Tenma Special Paper Co., Ltd.) weighing 30 g / m ² was used, and a cellulose-based ink (Showa Ink Kogyo Co., Ltd.) was applied to the upper surface of the thin paper. ) Made "S
AM ") to print a colored solid ink layer and a wood grain pattern by gravure printing to form a decoration treatment layer, and a two-component curable polyurethane resin paint (manufactured by The Inktech Co., Ltd.) on the decoration treatment layer "KR-92") was applied so as to be 3 g / m ² (at the time of drying) and dried to form a surface protective layer to obtain a decorative sheet D.

COMPARATIVE EXAMPLE 2 A paper reinforced thin paper weighing 30 g / m ² (“HP-30” manufactured by Tenma Specialty Paper Co., Ltd.) was used, and a formaldehyde scavenger (manufactured by Miki Riken Co., Ltd.) was placed on the upper surface of the thin paper. "C-6
Acrylic-cellulose-based paint containing 24% of “3”) (“FC Coating Solution [C]” manufactured by The Inktech Co., Ltd.)
The 2 g / m ² was coated so as to (dry) to form a formaldehyde scavenger layer, cellulosic inks (Showa Ink Kogyosho the upper surface of the formaldehyde scavenger layer Corporation
A colored solid ink layer and a wood grain pattern are printed by gravure printing using “SAM” manufactured by Nippon Kayaku Co., Ltd. to form a decoration treatment layer, and a two-component curable polyurethane resin paint (The Inktec Co., Ltd.) is formed on the decoration treatment layer. KR-92) 3 g / m ²
(At the time of drying) and dried to form a surface protective layer to obtain a decorative sheet E.

The above Examples 1, 2, 3 and Comparative Example 1,
Each of the decorative sheets A, B, C, D and E of No. 2 was 2.7 mm M
Decorative panels (DF) (E2 standard product) were prepared by laminating both surfaces of the DF using a vinyl acetate emulsion adhesive.

Then, 12 5 × 15 cm sample pieces were cut from the decorative plate, and the sample pieces were placed in a desiccator having a diameter of 24 cm. 300 ml of distilled water was placed in a crystal dish placed at the center of the bottom of the desiccator. 2 at 20 ° C
After standing for 4 hours, the amount of formaldehyde absorbed in distilled water was measured by acetylacetone colorimetry. As a result of measuring the formaldehyde concentration in this way, the concentration of formaldehyde in water was found to be 1.21 in the decorative board of Example 1.
mg / l, 0.53 mg / l for the decorative panel of Example 2, 0.65 mg / l for the decorative panel of Example 3, 1.70 mg / l for the decorative panel of Comparative Example 1, and for the decorative panel of Comparative Example 2. 1.14m
g / l.

[0034]

As described above, the decorative sheet of the present invention is a decorative sheet having a decorative sheet and a surface protective layer formed on one surface of a base sheet, wherein at least the surface protective layer has a formaldehyde scavenger. In addition to providing the necessary surface physical properties only with the essential constituent elements constituting the decorative sheet, the adhesive used for attaching the decorative sheet to the base material or the base material Also, since formaldehyde generated from other members existing indoors can be captured and adsorbed, the amount of formaldehyde existing indoors can be reduced or eliminated.

In addition, between the base sheet and the decoration treatment layer,
Alternatively, by forming a decorative sheet in which a formaldehyde capturing layer containing a formaldehyde capturing agent is formed on the other surface of the substrate sheet, the effect of capturing and adsorbing formaldehyde from the surface or from the substrate sheet side is further increased. Further, by making the base sheet into a decorative sheet made of a paper-based sheet, the base sheet becomes air-permeable, and captures and adsorbs formaldehyde generated from the base material, and formsaldehyde is formed on the base sheet by the air permeability. Since the possibility of being released from the end face is reduced, it is more effectively captured by the formaldehyde capturing agent,
The amount of formaldehyde present indoors can be further reduced as it absorbs and releases less to the surface. Also, the attachment to the substrate can be easily performed by using an emulsion solution or the like.

Further, by providing a decorative sheet made of a resin in which the surface protective layer is bonded to urethane by an isocyanate group, the surface properties effective as a decorative sheet such as abrasion resistance, water resistance, stain resistance and chemical resistance can be obtained. It can be prepared. Further, by forming the formaldehyde scavenger contained in the surface protective layer on a formaldehyde scavenger composed of sulfanilic acid supported on inorganic particles composed of silica, a solution for forming the surface protective layer can be obtained. You can be sure to distribute more quantities,
Since a uniform coating film can be formed, more formaldehyde can be captured and adsorbed. In addition, since the formaldehyde trapping substance can be exposed from the surface protective layer, it is possible to obtain stable formaldehyde trapping and adsorption performance from the surface of the decorative sheet.

Further, by forming the decorative sheet as a decorative plate having the surface opposite to the surface protective layer adhered to a base material, the surface properties required as a decorative plate can be obtained, and the base material or base material can be obtained. Adhesive used to attach the decorative sheet to the material, and formaldehyde generated from other members existing indoors are captured and absorbed, so the amount of formaldehyde existing indoors can be reduced or eliminated, Further, a decorative plate may be formed in which a layer having at least one of formaldehyde trapping property, formaldehyde impermeable property and moisture proof property is formed on the side opposite to the surface on which the decorative sheet is stuck. This decorative board has formaldehyde trapping property on one side and formaldehyde trapping property or formaldehyde impermeability on the other side, so it is used for attaching a decorative sheet to a base material or a base material Formaldehyde generated from the adhesive is trapped and adsorbed by the formaldehyde trapping agent in the formaldehyde trapping layer, or is blocked by the formaldehyde impermeable layer, so that formaldehyde is not released to the surface. Therefore, the irritating odor due to formaldehyde is extremely reduced. 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 a decorative sheet according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view illustrating a laminated structure of a decorative sheet according to a second embodiment of the present invention.

FIG. 3 is a cross-sectional view illustrating a laminated structure of a decorative sheet according to a third embodiment of the present invention.

FIG. 4 is a cross-sectional view showing a laminated structure of the decorative board according to the first embodiment of the present invention.

FIG. 5 is a cross-sectional view illustrating a laminated structure of a decorative board according to a second embodiment of the present invention.

[Explanation of symbols]

 1a, 1b, 1c Decorative sheet 2 Base sheet 3 Decoration treatment layer 3a Solid ink layer 3b Picture ink layer 4 Surface protection layer 5 Formaldehyde trapping layer 6 Base 7 Adhesive layer 8 Moisture proof layer 8a Thermoplastic resin layer 8b Thin paper 10, 20 Decorative board

Claims (9)

[Claims] 1. A decorative sheet in which a decorative treatment layer and a surface protective layer are sequentially formed on one surface of a base sheet, wherein at least the surface protective layer contains a formaldehyde scavenger. . 2. between the base sheet and the decoration treatment layer,
The decorative sheet according to claim 1, wherein a formaldehyde capturing layer containing a formaldehyde capturing agent is formed on the other surface of the base sheet. 3. The sheet for capturing formaldehyde according to claim 1, wherein the base sheet is made of a paper-based sheet. 4. The decorative sheet according to claim 1, wherein the surface protective layer is made of a resin that is urethane-bonded by an isocyanate group. 5. The decorative sheet according to claim 4, wherein the formaldehyde scavenger contained in the surface protective layer is formed by supporting a formaldehyde scavenger on inorganic particles. 6. The decorative sheet according to claim 5, wherein the inorganic particles are made of silica. 7. The decorative sheet according to claim 5, wherein the formaldehyde scavenger comprises sulfanilic acid. 8. A decorative plate comprising the decorative sheet according to claim 1 and a surface on which the surface protective layer is not formed is adhered to a substrate. 9. A layer having at least one of formaldehyde-scavenging property, formaldehyde-impermeable property and moisture-proof property is formed on a surface of the substrate opposite to a surface to which the decorative sheet is adhered. 8. The decorative plate according to item 8.