JP2001253010A - Decorative top panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a recyclable decorative top panel, which uses a melamine decorative panel and has capacity equal to that of a melamine decorative top panel, in place of the melamine decorative top panel. SOLUTION: The decorative top panel is constituted by laminating a decorative sheet, wherein a surface protective layer comprising an electron beam curable resin is formed on a sheet made of a synthetic resin comprising a non- halogen thermoplastic resin, on one surface of a steel panel through an adhesive layer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a decorative top plate having excellent design and used on surfaces of desks, tables, counters and the like.

[0002]

2. Description of the Related Art Conventionally, surfaces of desks, tables, counters, and the like have a large surface hardness, and are excellent in stain resistance and workability such as bending.
Alternatively, a so-called melamine decorative board made of a steel sheet or the like, in which a thermosetting resin such as a melamine resin is impregnated into titanium paper on which various abstract patterns are printed, dried, and then heat-pressed and heat-cured, is used. A decorative top plate adhered to a substrate via an adhesive layer is used.

[0003] However, the titanium paper used for the melamine decorative board is expensive. Naturally, the decorative top panel using the melamine decorative board must be expensive. The decorative top plate attached to a substrate such as a steel plate is difficult to separate the decorative melamine plate from the substrate such as a steel plate, and is usually disposed of as scrap.

[0004] For this reason, an inexpensive decorative top plate having the same performance as a decorative top plate using a melamine decorative plate in surface hardness, stain resistance, workability such as bending and the like is required, and in consideration of the global environment. From the viewpoint of recycling, there is a demand for a separable decorative top plate.

[0005]

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a melamine decorative top plate having the same degree as a melamine decorative top plate. Performance, specifically, abrasion resistance, abrasion resistance,
It is a decorative top plate that has stain resistance or processing suitability such as bending, and does not generate harmful gas even when incinerated at the time of disposal, so that recyclable materials can be easily separated. The purpose is to provide an environmentally friendly decorative top plate at low cost.

[0006]

Means for Solving the Problems In order to achieve the above object, the present inventor has proposed a decorative top plate according to the present invention,
A decorative sheet in which a surface protective layer made of an electron beam-curable resin is formed on a synthetic resin sheet made of a non-halogen-based thermoplastic resin is attached to one surface of a steel sheet via an adhesive layer. Things. With this configuration, it is possible to provide a decorative top plate having a large surface hardness and excellent workability such as stain resistance and bending. Also, from the viewpoint of recycling, by putting the decorative top plate with the decorative sheet adhered into the melting furnace, only iron can be easily taken out and reused.

Further, the invention according to claim 2 is characterized in that, in the decorative top plate according to claim 1, the non-halogen thermoplastic resin comprises an olefin thermoplastic resin. With this configuration, an environmentally friendly and inexpensive decorative top plate can be obtained.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below. First, synthetic resin sheets made of a non-halogen thermoplastic resin constituting the decorative top plate of the present invention include low-density polyethylene (including linear low-density polyethylene), medium-density polyethylene, high-density polyethylene, and ethylene α-olefin. Copolymer, homopolypropylene, polymethylpentene, polybutene, ethylene-propylene copolymer, propylene-butene copolymer, ethylene-vinyl acetate copolymer, saponified ethylene-vinyl acetate copolymer, or a mixture thereof Olefinic thermoplastic resins such as polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, polyethylene naphthalate-isophthalate copolymer, polycarbonate, and polyarylate;
Acrylic thermoplastic resin such as polymethyl methacrylate, polyethyl methacrylate, polyethyl acrylate, polybutyl acrylate, nylon-6, nylon-66
Polyamide-based thermoplastic resin such as polyimide, polyurethane, polystyrene, acrylonitrile
A sheet made of a non-halogen-based thermoplastic resin such as butadiene-styrene resin may be mentioned. The sheet may be a sheet made of the thermoplastic resin alone, or a sheet made of a mixture of two or more kinds. Or a laminated body composed of two or more sheets, but the decorative top plate usually has excellent design properties and various physical properties required as a top plate. In addition, a printing layer and a surface protection layer are provided on a synthetic resin sheet made of the non-halogen thermoplastic resin, and an uneven pattern is provided by embossing or the like. Therefore, the synthetic resin sheet is required to have suitability for printing and embossing, and to be inexpensive. In view of these, an olefin-based thermoplastic resin is suitable.

The synthetic resin sheet made of the non-halogen thermoplastic resin may be in a non-stretched state,
The sheet may be in any state of being stretched in the axial or biaxial direction, or may be a colored sheet to which a pigment or the like is added, but the thickness of the synthetic resin sheet is as follows. It is preferably about 50 to 300 μm. If necessary, one or both surfaces of the synthetic resin sheet may be subjected to an easy adhesion treatment such as a corona discharge treatment, a plasma treatment, and an ozone treatment. In addition, the non-halogenated thermoplastic resin constituting the synthetic resin sheet may contain a known antioxidant, a light stabilizer, an ultraviolet ray inhibitor, or an inorganic filler for imparting flame retardancy, if necessary. And various other additives can be added.

Next, the surface protective layer constituting the decorative top plate of the present invention is formed using a curable resin in consideration of abrasion resistance, abrasion resistance, stain resistance, and workability such as bending. However, considering the combination with the above-mentioned synthetic resin sheet, an electron beam-curable resin is preferable because of high energy and high efficiency.

The electron beam-curable resin is a resin which undergoes a cross-linking polymerization reaction upon irradiation with an electron beam to change into a three-dimensional polymer structure. As the electron beam source, use various types of electron beam accelerators such as Cockloft-Walton type, Van degraft type, Resonant transformer type, Insulated core transformer type, or linear type, Dynamitron type, and high frequency type lamp, and 100 ~ 10
Irradiation with electrons having an energy of 00 KeV, preferably 100 to 300 KeV can be used.

As the electron beam-curable resin, in the molecule,
A monomer, a prepolymer or a polymer having a radically polymerizable unsaturated group such as a (meth) acryloyl group or a (meth) acryloyloxy group, or a cationically polymerizable functional group such as an epoxy group (hereinafter collectively referred to as compound Called)
Consists of These monomers, prepolymers, and polymers may be used alone or as a mixture of two or more.
In this specification, (meth) acrylate is used to mean acrylate or methacrylate.

Examples of the prepolymer having a radical polymerizable unsaturated group include polyester (meth) acrylate, urethane (meth) acrylate, epoxy (meth) acrylate, melamine (meth) acrylate, triazine (meth) acrylate, and polyvinylpyrrolidone. No. This prepolymer usually has a molecular weight of about 10,000 or less. If the molecular weight exceeds 10,000, the cured resin layer has insufficient surface properties such as scratch resistance, abrasion resistance, chemical resistance and heat resistance. Although the above acrylate and methacrylate can be used in common, acrylate is faster than acrylate in terms of the rate of crosslinking and curing with an electron beam. Therefore, acrylate is more advantageous for the purpose of curing efficiently at high speed in a short time.

Examples of the prepolymer having a cationically polymerizable functional group include epoxy resins such as bisphenol epoxy resin, novolak epoxy resin, alicyclic epoxy resin, aliphatic vinyl ether, aromatic vinyl ether, urethane vinyl ether, and the like. Vinyl ether resins such as ester vinyl ethers, cyclic ether compounds,
Prepolymers such as spiro compounds are exemplified.

Examples of the monomer having a radical polymerizable unsaturated group include monofunctional monomers of a (meth) acrylate compound such as methyl (meth) acrylate, ethyl (meth) acrylate, butyl (meth) acrylate, Methoxyethyl (meth) acrylate, methoxybutyl (meth) acrylate, butoxyethyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, N, N-
Dimethylaminomethyl (meth) acrylate, N, N-
Dimethylaminoethyl (meth) acrylate, N, N-
Diethylaminoethyl (meth) acrylate, N, N-
Diethylaminopropyl (meth) acrylate, N, N
-Dibenzylaminoethyl (meth) acrylate, lauryl (meth) acrylate, isobonyl (meth) acrylate, ethyl carbitol (meth) acrylate, phenoxyethyl (meth) acrylate, phenoxypolyethylene glycol (meth) acrylate, tetrahydrofurfuryl (meth) ) Acrylate, methoxypropylene glycol (meth) acrylate, 2- (meth) acryloyloxyethyl-2-hydroxypropyl phthalate, 2- (meth) acryloyloxypropyl hydrogen terephthalate and the like.

Further, as the polyfunctional monomer having a radical polymerizable unsaturated group, ethylene glycol di (meth) acrylate, diethylene glycol di (meth) acrylate, triethylene glycol di (meth) acrylate,
Propylene glycol di (meth) acrylate, dipropylene glycol (meth) acrylate, neopentyl glycol di (meth) acrylate, 1,6 hexanediol di (meth) acrylate, 1,9-nonanediol di (meth) acrylate, tetraethylene Glycol di (meth) acrylate, tripropylene glycol di (meth) acrylate, bisphenol-A-di (meth) acrylate, trimethylolpropane tri (meth) acrylate, trimethylolpropane ethylene oxide tri (meth) acrylate, pentaerythritol tri ( (Meth) acrylate, pentaerythritol tetra (meth) acrylate, dipentaerythritol penta (meth) acrylate, dipentaerythritol hexa (meth) acryl Over DOO, glycerin polyethylene oxide tri (meth) acrylate, tris (meth)
Acryloyloxyethyl phosphate and the like.

The monomer having a cationically polymerizable functional group is
Prepolymer monomers having a cationically polymerizable functional group can be used.

Further, as a solvent for the electron beam-curable resin,
Paints, those commonly used in inks and the like can be used, specifically, toluene, aromatic hydrocarbons such as xylene, acetone, methyl ethyl ketone, methyl isobutyl ketone, ketones such as cyclohexanone, ethyl acetate, Examples thereof include acetates such as isopropyl acetate and amyl acetate, alcohols such as methyl alcohol, ethyl alcohol and isopropyl alcohol, ethers such as dioxane, tetrahydrofuran and diisopropyl ether, and a mixture of two or more of these.

As a method for forming a surface protective layer with this electron beam-curable resin, for example, this electron beam-curable resin is converted into a solution and coated by a well-known coating method such as a gravure coating method or a roll coating method. Can be formed. The coating amount in this case, approximately 5 to 30 g / m ² as solids, preferably 7~20g / m ^2.
The reason for this is that if the coating amount is less than 5 g / m ² , the surface hardness decreases and the scratch resistance and abrasion resistance decrease,
If the coating amount is more than 30 g / m ² , the flexibility is reduced and the workability such as bending is deteriorated.

When the surface protective layer made of an electron beam-curable resin is to be further provided with scratch resistance and abrasion resistance, powdery aluminum oxide, silicon carbide, silicon dioxide, titanic acid, etc. It can be achieved by adding an abrasive such as calcium, barium titanate, magnesium pyroborate, zinc oxide, silicon nitride, zirconium oxide, chromium oxide, iron oxide, boron nitride, diamond, gold sand and glass fiber. Electron beam curable resin of this abrasive
An appropriate ratio to 100 parts by weight is 1 to 80 parts by weight.

The electron beam-curable resin described above may contain, if necessary, a coloring agent such as a dye or a pigment, a filler such as a gloss adjusting agent or a bulking agent, an antifoaming agent, a leveling agent, or a thixotropic agent. And the like.

For the purpose of improving the adhesive strength between the synthetic resin sheet and the surface protective layer, a primer layer may be provided between the synthetic resin sheet and the surface protective layer. The primer layer is formed of a resin comprising a copolymer of an acrylic resin and a urethane resin, and isocyanate. That is, in the primer layer, the copolymer of the acrylic resin and the urethane resin is composed of an acrylic polymer component having a hydroxyl group at the terminal (component A), a polyester polyol component having a hydroxyl group at both terminals (component B), and a diisocyanate component (component B). It is obtained by blending and reacting component C) to form a prepolymer, and further adding a chain extender such as diamine (component D) to the prepolymer to extend the chain. By this reaction, a polyester urethane is formed and an acrylic polymer component is introduced into the molecule to form an acrylic-polyester urethane copolymer having a hydroxyl group at a terminal. The acrylic-polyester urethane copolymer is formed by reacting a terminal hydroxyl group with isocyanate and curing the same.

As the component A, a linear acrylate polymer having a hydroxyl group at a terminal is used. Specifically, linear polymethyl methacrylate (PMMA) having a hydroxyl group at a terminal is preferable because it has excellent weather resistance (particularly properties against light degradation) and is easily copolymerized with urethane and made compatible. . The component A is an acrylic resin component in the copolymer, and has a molecular weight of 5,000 to 70.
Those having a weight average molecular weight of 00 are preferably used because they have particularly good weather resistance and adhesiveness. The component A
May be only those having a hydroxyl group at both ends,
Those having a conjugated double bond remaining at one end may be used in combination with those having a hydroxyl group at both ends. By mixing an acrylic polymer having a conjugated double bond remaining, a layer in contact with the primer layer, for example, when an electron beam-curable resin is used as the resin of the surface protective layer, the electron beam-curable resin and the acrylic Since the conjugated double bond of the polymer reacts, it is possible to improve the adhesiveness particularly with the electron beam-curable resin, and when forming the surface protective layer using the electron beam-curable resin, the primer layer It is desirable to provide.

The component B reacts with diisocyanate to form a polyester urethane, and forms a urethane resin component in the copolymer. As the component B, a polyester diol having a hydroxyl group at both terminals is used. The polyester diol is derived from an addition reaction product of a diol compound having an aromatic or spiro ring skeleton and a lactone compound or a derivative thereof, or an epoxy compound, a condensation product of a dibasic acid and a diol, and a cyclic ester compound. And the like. As the diol, ethylene glycol,
Examples thereof include short-chain diols such as propylene glycol, diethylene glycol, butanediol, hexanediol, and methylpentanediol, and alicyclic short-chain diols such as 1,4 cyclohexanedimethanol. Examples of the dibasic acid include adipic acid, phthalic acid, isophthalic acid, terephthalic acid, and the like. Preferred as the polyester polyol are adipic acid or a mixture of adipic acid and terephthalic acid, particularly adipic acid as the acid component, and 3% as the diol component.
-Adipate-based polyester using methylpentanediol and 1,4-cyclohexanedimethanol.

In the primer layer, the urethane resin component formed by the reaction between the component B and the component C gives the primer layer flexibility and contributes to the adhesion to the synthetic resin sheet. The acrylic resin component composed of an acrylic polymer contributes to weather resistance and blocking resistance in the primer layer. In the urethane resin, the molecular weight of the component B may be any range as long as a urethane resin capable of sufficiently exhibiting flexibility in the primer layer is obtained, and adipic acid or a mixture of adipic acid and terephthalic acid, 3-methylpentanediol and In the case of polyester diol consisting of 1,4 cyclohexanedimethanol, 500 to 50
00 (weight average molecular weight) is preferred.

As the component C, an aliphatic or alicyclic diisocyanate compound having two isocyanate groups in one molecule is used. As the diisocyanate, for example, tetramethylene diisocyanate, 2,2,4 (2,4,
4) -1,6 Hexamethylene diisocyanate, isophorone diisocyanate, 4,4'dicyclohexylmethane diisocyanate, 1,4'cyclohexyl diisocyanate, and the like. As the diisocyanate component, isophorone diisocyanate is preferred because of its excellent physical properties and cost. The total hydroxyl groups (including amino groups) of the acrylic polymer, polyester polyol, and chain extender described below when reacting the above components A to C.
And the equivalent ratio of the isocyanate groups is such that the isocyanate groups become excessive.

The above three components A, B and C are mixed at 60-120 ° C.
When the reaction is performed for about 10 hours, the isocyanate group of the diisocyanate reacts with the hydroxyl group at the terminal of the polyester polyol to form a polyester urethane resin component, and a compound in which the diisocyanate is added to the hydroxyl group at the terminal of the acrylic polymer is also mixed. A prepolymer with the groups and hydroxyl groups remaining is formed. As a chain extender to this prepolymer, for example, a diamine such as isophorone diamine or hexamethylene diamine is added, and an isocyanate group is reacted with the chain extender. By extending the chain, the acrylic polymer component is introduced into the polyester urethane molecule. An acrylic-polyester urethane copolymer having an introduced hydroxyl group at the end can be obtained.

This acrylic-polyester urethane copolymer is added with an isocyanate and a coating liquid is adjusted to a necessary viscosity in consideration of a coating method and a coating amount (after drying). The primer layer can be formed by applying a known coating method such as a coating method or a roll coating method. The coating amount after drying of the primer layer is suitably from 1 to 20 g / m ^2, preferably from 1 to 5 g / m ^2. Further, the primer layer may be a layer to which additives such as a filler such as silica fine powder, a light stabilizer, and a coloring agent are added as required in addition to the resin. Further, any isocyanate may be used as long as it can react with a hydroxyl group of the acrylic-polyester urethane copolymer to be crosslinked and cured. For example, divalent or higher valent aliphatic or aromatic isocyanates can be used. Aliphatic isocyanates are desirable from the viewpoint of preventing thermal discoloration and weather resistance. Specifically, tolylene diisocyanate, xylylene diisocyanate, 4,4′-dicyclohexylmethane diisocyanate, hexamethylene diisocyanate, a monomer of lysine diisocyanate, or a multimer such as a dimer or trimer thereof, or ,
Examples thereof include polyisocyanates such as derivatives (adducts) obtained by adding these isocyanates to polyols.

The present invention will be described in more detail with reference to the drawings and the like. FIG. 1 is a cross-sectional view schematically showing a basic configuration of a decorative top plate according to the present invention. FIG. 2 is a cross-sectional view showing a specific example of a decorative sheet used for the decorative top plate according to the present invention. 3 is a cross-sectional view showing another specific example of the decorative sheet used for the decorative top plate according to the present invention, wherein 1 is a decorative top plate, 2 is a steel plate, 3, 70 is an adhesive layer, ,
4 ', 4''are decorative sheets, 40, 40', 40 '' are synthetic resin sheets, 41 is a surface protective layer, 50 is an uneven pattern, 51 is wiping ink, 52, 52 ', 52''are primers Layer, 60 indicates a picture printing layer, and 61 indicates a solid printing layer.

FIG. 1 is a sectional view schematically showing a basic structure of a decorative top plate according to the present invention.
Has a surface protection layer 41 formed of an electron beam curable resin on one surface of a synthetic resin sheet 40 made of a halogen-free thermoplastic resin on one surface of a steel plate 2 with an adhesive layer 3 interposed therebetween. The sheet 4 is bonded so that the surface protective layer 41 is exposed. Since the decorative top plate 1 having the surface protective layer 41 formed of the electron beam-curable resin as described above has a large surface hardness and a high flexibility, it has abrasion resistance, abrasion resistance, stain resistance, and bending. And so on, which are excellent in processability.

Next, specific examples of the decorative sheet used for the decorative top plate 1 of the present invention will be described. FIG. 2 is a cross-sectional view showing a specific example of a decorative sheet used for a decorative top plate according to the present invention. The decorative sheet 4 ′ is formed on the decorative sheet 4 (see FIG. 1) by using a printed pattern or an uneven pattern. FIG. 1 shows one embodiment of a means for imparting a design property which should be originally provided as a decorative sheet, specifically, one surface of a synthetic resin sheet (a transparent sheet in this embodiment) 40 ′. After embossing is performed to provide an uneven pattern 50, a wiping process is performed from above to fill the recesses of the uneven pattern 50 with the wiping ink 51, and then a primer layer 52 (this primer layer is Is provided, a surface protective layer 41 made of an electron beam-curable resin is formed on the primer layer 52, and the other surface of the synthetic resin sheet 40 'is interposed via the primer layer 52'. Picture printing layer 60 It is obtained by forming a solid print layer 61. The decorative sheet 4 'shown in FIG.
And the solid printed layer 61 of the decorative sheet 4 ′
By bonding the surface and one surface of the steel plate 2 shown in FIG. 1 via an adhesive layer 3, a decorative top plate of the present invention can be obtained.

FIG. 3 is a sectional view showing another specific embodiment of the decorative sheet used for the decorative top plate according to the present invention.
The decorative sheet 4 ″ is an example of another means for providing the decorative sheet 4 (see FIG. 1) with a design that should be originally provided as a decorative sheet such as a printed pattern or an uneven pattern. After subjecting at least one surface of the synthetic resin sheet 40 '' to an easy-adhesion treatment such as a corona discharge treatment, a plasma treatment, and an ozone treatment, a primer layer 52 '' is attached to the easy-adhesion treatment surface (not shown). The solid print layer 61 and the pattern print layer 60 are sequentially formed by printing on the primer layer 52 '', and further, a known dry lamination adhesive such as a two-component curable urethane resin is formed on the pattern print layer 60. Adhesive layer formed
A synthetic resin sheet (a transparent sheet in this embodiment) 40 'is pasted through a known dry lamination method through a 70, and the surface of the synthetic resin sheet 40' is embossed to form an uneven pattern 50. After that, similarly to the decorative sheet 4 'shown in FIG.
After filling with 51, a primer layer 52 (this primer layer is the primer layer described above) is provided on the surface,
The surface protective layer 41 made of an electron beam curable resin is formed on the primer layer 52. This decorative sheet 4 ″ is used in place of the decorative sheet 4 shown in FIG. 1, and the surface of the synthetic resin sheet 40 ″ of the decorative sheet 4 ″ and one surface of the steel sheet 2 shown in FIG. By pasting through the adhesive layer 3, the decorative top plate of the present invention can be obtained. The synthetic resin sheet 40 ″ is generally a colored sheet, but may be an uncolored sheet. Further, the synthetic resin sheet 40 '' can be the same as the synthetic resin sheet 40 described above,
Olefin-based thermoplastic resins are preferred for the same reasons as described for the synthetic resin sheet 40.

Next, the synthetic resin sheet shown in FIG.
The primer layer 52 'provided on the other surface of the 40' is to improve the adhesiveness between the synthetic resin sheet 40 'made of an olefin-based thermoplastic resin and the printing layer such as the pattern printing layer 60 or the solid printing layer 61. It is preferable to use the same resin as that of the primer layer 52, and the forming method is the same as that of the primer layer 52. The primer layer 52 ″ provided on the synthetic resin sheet 40 ″ shown in FIG.
It is provided to improve the adhesion between the synthetic resin sheet 40 '' and a printing layer such as the solid printing layer 61, and when the synthetic resin sheet 40 '' is made of an olefin-based thermoplastic resin, It is preferable to use the same resin as the primer layer 52 described above, and the forming method is the same as the method of forming the primer layer 52.

The concave-convex pattern 50 can be formed by hot pressing, hairline processing, or the like. Examples of the concavo-convex pattern 50 include a conduit groove, a stone plate surface irregularity, a cloth surface texture, a satin finish, a grain, a hairline, and a linear groove.

The pattern printing layer 60 and the solid printing layer 61 generally include gravure printing, offset printing,
It can be formed using ink by a known printing method such as silk screen printing. The pattern layer 60 is, for example, a grain pattern, a stone pattern, a cloth pattern, a leather pattern, a geometric pattern, a character, a symbol, a line drawing, or various abstract patterns. Solid printed with a colored ink having the following formula: FIGS. 2 and 3 show a configuration in which both the picture print layer 60 and the solid print layer 61 are provided, but either one of the configurations may be used.

As the ink used for the pattern printing layer 60 and the solid printing layer 61, chlorinated polyolefins such as chlorinated polyethylene and chlorinated polypropylene, polyesters, polyurethanes composed of isocyanate and polyol, and polyacryls are used as vehicles. One or more kinds of polyvinyl acetate, polyvinyl chloride, vinyl chloride-vinyl acetate copolymer, cellulose resin, polyamide resin, etc. are mixed and used, and pigments, solvents, various auxiliaries and the like are added thereto. Ink can be used,
In consideration of environmental issues, a non-chlorine-based vehicle in which one or more kinds of polyester, polyurethane composed of isocyanate and polyol, polyacryl, polyvinyl acetate, cellulose-based resin, polyamide-based resin and the like are mixed is more suitable. Preferably, one or two or more of polyester, polyurethane composed of isocyanate and polyol, polyacryl, polyamide resin and the like are mixed.

The decorative sheet 4 'shown in FIGS.
And 4 '' are specific examples of the decorative sheet used for the decorative top plate according to the present invention, and are not limited thereto as long as they do not depart from the gist of the present invention. .

[0038]

Next, the present invention will be described in more detail with reference to the following examples. Example 1 First, a colored polypropylene film of 60 μm having a corona discharge treatment on both sides [Mitsubishi Chemical MKV.
B013] is coated with a solution of an acryl-urethane resin (a resin obtained by adding 5 parts by weight of hexamethylene diisocyanate to 100 parts by weight of an acrylic polyol) to a solid content of 2 g / m ² by a gravure coating method. A primer layer for printing is formed, and a solid pattern layer is formed on the primer layer by a gravure printing method using a printing ink composed of an acryl-urethane resin (a resin obtained by adding 5 parts by weight of hexamethylene diisocyanate to 100 parts by weight of an acrylic polyol). Then, a printed sheet was formed on which a printed pattern layer having a wood grain pattern was formed. Next, a transparent polypropylene film of 80 μm having a corona discharge treatment on both sides [Mitsubishi Chemical MKV.
PA002] is coated with a dry laminating adhesive [E-95L manufactured by Dainichi Seika Kogyo Co., Ltd.] at a solid content of 20 g / m ^{2 so that} the printing surface of the printing sheet is positioned on the adhesive side. Then, the printed sheet was bonded to the printed sheet by a known dry lamination method to obtain a laminate. Next, a concave portion of a conduit groove is provided on the transparent polypropylene film surface of the laminate, and an acryl-urethane resin [100 parts by weight of acrylic polyol and hexamethylene diisocyanate is added to the entire surface of the transparent polypropylene film provided with the concave portion. Resin to which parts by weight have been added] The solution is applied by a gravure coating method so as to have a solid content of 2 g / m ² to form a primer layer for a surface protective layer. [Dainichi Seika Chemical Co., Ltd. EBD-01] is applied by a roll coat method, dried, and then irradiated with an electron beam in an environment having an oxygen concentration of 200 PPM or less, so that a solid content is 15 g /
A decorative sheet having an m ² surface protective layer was produced.

Next, the decorative sheet prepared above was coated with an epoxy resin so that the surface protective layer of the decorative sheet was exposed.
The isocyanate-based adhesive was applied under pressure at a solid content of 10 g / m ² to a degreased 0.8 mm-thick steel plate to obtain a decorative top plate of the present invention.

The cosmetic top plate of the present invention thus obtained can be wiped dry with black magic ink (oily).
Also, 8R bending was possible with respect to bending workability.

[0041]

According to the present invention, as described so far,
It is possible to provide a decorative top plate that is excellent in scratch resistance, abrasion resistance, and stain resistance, and is also excellent in workability such as bending, and does not generate harmful gas even when incinerated at the time of disposal. Further, it is possible to provide an environment-friendly decorative top plate in which recyclable materials can be easily separated at the time of disposal.

[Brief description of the drawings]

FIG. 1 is a sectional view schematically showing a basic configuration of a decorative top plate according to the present invention.

FIG. 2 is a cross-sectional view showing one specific example of a decorative sheet used for a decorative top plate according to the present invention.

FIG. 3 is a sectional view showing another specific example of a decorative sheet used for a decorative top plate according to the present invention.

[Explanation of symbols]

 1 decorative top plate 2 steel plate 3,70 adhesive layer 4,4 ', 4' 'decorative sheet 40,40', 40 '' synthetic resin sheet 41 surface protective layer 50 uneven pattern 51 wiping ink 52,52 ', 52 '' Primer layer 60 Picture printing layer 61 Solid printing layer

Continued on the front page F-term (reference) 3B053 PA04 PB01 PB05 PC02 4F100 AB04C AK01A AK01B AK03A AK07 AK25 AK25J AK51 AK51G AK51J AK53G AK80A AL01 AL01G AS00B BA03 BA07 BA10A BA10C CB00B16B01B01B01 J01H01

Claims (2)

[Claims] 1. A decorative sheet in which a surface protective layer made of an electron beam-curable resin is formed on a synthetic resin sheet made of a non-halogen thermoplastic resin, and the decorative sheet is adhered to one surface of a steel sheet via an adhesive layer. A decorative top plate, characterized in that: 2. The non-halogen-based thermoplastic resin comprises an olefin-based thermoplastic resin.
The makeup top plate as described.