JP2001193267A - Decorative material for floor material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To inexpensively provide a decorative material for a floor material superior in scratch resistance, wear resistance and water resistance, in particular, superior in water resistance of a part having a groove or the like processed therein, and eliminating the problem of discoloring or the like. SOLUTION: The decorative material for the floor material sticking a decorative sheet along the surface shape f a wooden base material having a surface with at least a groove processed therein comprises a synthetic resin made transparent sheet having a surface protection layer comprising ionizing radiation curing mold resin by the decorative sheet on the surface layer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a decorative material for flooring comprising a wooden base material having grooves or the like formed on the surface thereof, and more particularly to a flooring material having scratch resistance, abrasion resistance, water resistance and the like. The present invention relates to a decorative material for flooring, which is excellent in physical properties as a decorative material for materials, and is particularly excellent in water resistance at a portion where a groove or the like is processed.

[0002]

2. Description of the Related Art Conventionally, a flooring material such as a plywood, a particle board, a medium density fiberboard (MDF) or the like is applied to a floor surface of a house or the like, and a decorative material for a flooring material is adhered to a wooden base material.
By the way, among these flooring decorative materials, those obtained by subjecting the surface or the like of the flooring decorative material to groove processing such as a V-shape or the like are frequently used because of their excellent design.

[0003] However, a flooring decorative material whose surface is subjected to groove processing or the like is usually provided with a decorative sheet attached to the surface of a wooden base material and then cut by a cutting machine such as a V-grooving machine. After processing, etc., a transparent or colored paint is applied to the part that has been subjected to groove processing, etc., to make the part subjected to groove processing, etc. water resistant, or the part, which has been subjected to groove processing, etc. And color adjustment of the part where the decorative sheet is stuck.

[0004] However, such grooves or the like are provided with water resistance, or transparent or colored for adjusting the color between the grooves or the like and the part to which the decorative sheet is attached. The work of applying the applied paint is a selective application work such as groove processing part, it is a complicated and laborious work, and the applied paint peels off over time, causing color discoloration problems, There arises a problem that the water resistance of the portion subjected to the groove processing or the like is reduced and swells.

[0005]

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in view of the above problems, and it is an object of the present invention to provide excellent scratch resistance, abrasion resistance, and water resistance. An object of the present invention is to provide an inexpensive flooring decorative material in which a portion subjected to groove processing is excellent in water resistance and does not cause a problem such as discoloration.

[0006]

Means for Solving the Problems To solve the above problems, the present inventors first set forth a first aspect of the present invention is to provide a wooden base having at least a grooved surface. A decorative material for flooring, in which a decorative sheet is attached along the surface shape of the material, wherein the decorative sheet is made of a synthetic resin transparent sheet having a surface protective layer made of an ionizing radiation-curable resin on a surface layer. Things. With such a configuration, it is possible to eliminate the need for a selective application work such as a groove processing portion, which is a rather time-consuming and complicated work, and it is excellent in water resistance and does not cause a problem such as discoloration. A decorative material for flooring having a portion and the like and having excellent surface properties such as scratch resistance, abrasion resistance, water resistance, and stain resistance can be obtained.

[0007] The invention described in claim 2 is the first invention.
The floor covering decorative material according to the above, wherein the surface protective layer is formed on the synthetic resin transparent sheet via a primer layer formed from an acrylic resin and a urethane resin copolymer and isocyanate. Is what you do.
With this configuration, the adhesive strength of the surface protective layer to the transparent sheet can be improved.

According to a third aspect of the present invention, in the decorative material for flooring according to any one of the first and second aspects, the transparent sheet made of synthetic resin is made of an olefin-based thermoplastic resin. Is what you do. With this configuration, an environment-friendly decorative material for flooring free of generation of harmful gas can be obtained.

The invention described in claim 4 is the first invention.
The decorative material for flooring according to any one of the preceding claims, wherein a synthetic resin moisture-proof sheet is attached to the back surface of the wood-based base material. With such a configuration, it is possible to prevent water absorption and release of the wood-based base material from the back surface, and it is possible to provide a decorative material for flooring that is unlikely to warp or crack.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings and the like. FIG. 1 is a sectional view schematically showing a first basic configuration of a decorative material for flooring according to the present invention, and FIG. 2 is a schematic view showing a second basic configuration of a decorative material for flooring according to the present invention. FIG. 3 is a cross-sectional view schematically showing a decorative sheet used for a decorative material for flooring according to the present invention. FIG. 4 is a decorative sheet used for a decorative material for flooring according to the present invention. It is a sectional view showing another specific example of the
In the figure, 1,1 'is a decorative material for flooring, 2,2', 2 '' is a decorative sheet, 3 is a wooden base material, 4 is a moisture-proof sheet made of synthetic resin,
5, 51, 52 are primers, 10 is V groove processing, 11 is C surface processing, 12 is female, 13 is male, 21 is a surface protective layer, 22 is a transparent film made of synthetic resin, 22 'is made of synthetic resin A sheet, 60 is an uneven pattern, 70 is a wiping ink, 80 is a picture layer, 81 is a solid printing layer, and 90 is an adhesive layer.

FIG. 1 is a sectional view schematically showing a first basic structure of a decorative material for flooring according to the present invention.
The decorative material 1 for flooring is formed by applying an adhesive (not shown) to the surface of a wooden substrate 3 having a V-groove processing 10 on the surface and a C-surface processing 11 on the corners on the surface side. A decorative sheet 2 made of a synthetic resin transparent sheet 22 having a surface protective layer 21 made of an ionizing radiation curable resin on the surface so as to partially include both sides of the wooden base material 3 along the surface shape of the base material 3 Are bonded via an adhesive (not shown). The wooden base material 3
A female nut 12 is provided on one side and the female nut is provided on the other side.
There is provided a male 13 which can be fitted to the 13. In addition, V groove processing 10
And the C-plane processing 11 is an example of the groove and the C-plane processing, and is not limited to this.

FIG. 2 is a sectional view schematically showing a second basic structure of the decorative material for flooring according to the present invention.
The decorative material for flooring 1 ′ is obtained by bonding a moisture-proof sheet 4 made of synthetic resin to the back surface of the wooden base material 3 of the decorative material for flooring 1 shown in FIG. 1 via an adhesive (not shown). Other than this, it is the same as the floor covering decorative material 1 shown in FIG. With this configuration, the decorative material for flooring 1 ′ can prevent water absorption and release from the back surface of the wooden base material 3 as compared with the decorative material for flooring 1 shown in FIG. It can be used as a decorative material for flooring that is less likely to crack or crack.

The transparent sheet 22 made of synthetic resin constituting the decorative sheet 2 includes low-density polyethylene (including linear low-density polyethylene), medium-density polyethylene, high-density polyethylene, ethylene α-olefin copolymer, homopolypropylene, Olefinic thermoplastic resins such as polymethylpentene, polybutene, ethylene-propylene copolymer, propylene-butene copolymer, ethylene-vinyl acetate copolymer, saponified ethylene-vinyl acetate copolymer, and mixtures thereof Thermoplastic ester resins such as polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, polyethylene naphthalate-isophthalate copolymer, polycarbonate, polyarylate, polymethyl methacrylate, polyethyl methacrylate, Acrylic thermoplastic resin such as polyethyl acrylate and polybutyl acrylate, nylon
6, non-halogen thermoplastic resins such as polyamide, thermoplastic resins such as nylon-66, and polyimide, polyurethane, polystyrene, and acrylonitrile-butadiene-styrene resins. These thermoplastic resins may be used alone or as a mixture of two or more. However, the synthetic resin transparent sheet 22 used for the decorative sheet 2 of the present invention is subjected to means for imparting a design property described later as a decorative material for flooring, specifically, embossing or the like for providing a printed pattern or an uneven pattern. In order to be able to do this, they must be inexpensive and need to be inexpensive.
Taking into account the fact that no harmful gas is generated during combustion, which has recently become a problem, olefin-based thermoplastic resins are preferred.

The synthetic resin transparent sheet 22 made of the olefinic thermoplastic resin may be in a non-stretched state or a sheet stretched in one or two axes. Further, a colored sheet to which a pigment or the like is added may be used, but the thickness of the synthetic resin transparent sheet 22 is preferably about 60 to 300 μm. If necessary, the synthetic resin transparent sheet 22 may be used.
One or both surfaces may be subjected to an easy adhesion treatment such as a corona discharge treatment, a plasma treatment, and an ozone treatment. In addition, the olefin-based thermoplastic resin constituting the synthetic resin transparent sheet 22 may appropriately include a well-known antioxidant, a light stabilizer, an ultraviolet ray inhibitor, or an inorganic filler for imparting flame retardancy, or In addition, various additives such as a foaming agent for imparting a design property can be added. by the way,
As the pigment used for the colored sheet, an organic pigment may be used, but a known inorganic pigment is suitable in consideration of heat resistance and weather resistance.

The moisture-proof sheet 4 made of synthetic resin includes
In consideration of the moisture-proof performance and cost, or the fact that no harmful gas is generated during combustion, which has recently become a problem, a sheet made of an olefin-based thermoplastic resin is preferable. Specifically, the olefinic thermoplastic resin described in the synthetic resin transparent sheet 22 can be used, and the thickness thereof varies depending on the type of the olefinic thermoplastic resin to be used, but the moisture permeability is 30 g / m2. ² · 24hr (JISZ0208:
Measurement by cup method) or less, more preferably 20 g / m ² · 24
hr (JISZ0208: measurement by cup method) or less, and is generally 25 to 50 μm. This synthetic resin moisture-proof sheet 4 may be subjected to one or both surfaces thereof to be subjected to an easy adhesion treatment such as a corona discharge treatment, a plasma treatment or an ozone treatment.

Next, as the surface protective layer 21 formed on the surface layer of the decorative material for flooring 1, 1 'of the present invention, the abrasion resistance, abrasion resistance and stain resistance required for the decorative material for flooring are required. This surface protective layer is provided to impart surface properties such as properties.
Examples of the resin forming 21 include one or more of an epoxy resin, an acrylic resin, a urethane resin, a polyamide resin, a polyester resin, or a polyolefin such as polyethylene, polypropylene, polybutene, polybutadiene, polyisoprene or ethylene. , Copolymers of two or more olefins such as propylene, butene, butadiene, isoprene, or copolymers of α-olefins having 4 or more carbon atoms (linear low-density polyethylene);
Examples thereof include an ethylene-vinyl acetate copolymer, a saponified ethylene-vinyl acetate copolymer, and a mixed resin of one or more of these. Also,
As a method for forming the surface protective layer 21, for example, a solution of the resin, or a solution obtained by heating and melting the resin, a known gravure printing method, a roll coating method, or an appropriate application method such as an extrusion coating method is used. It can be formed by applying the above resin, or by laminating the above resin into a film by a well-known dry lamination method or the like, but it is particularly preferable to form the film by using an ionizing radiation curable resin.

The ionizing radiation-curable resin is a resin which undergoes a cross-linking polymerization reaction upon irradiation with ionizing radiation and changes into a three-dimensional polymer structure. Ionizing radiation refers to electromagnetic waves or charged particle beams having energy quanta that can polymerize and crosslink molecules, and include visible light, ultraviolet light (near ultraviolet light, vacuum ultraviolet light, etc.), X-rays, electron beams, ion beams, and the like. is there. Usually, ultraviolet rays or electron beams are used. Ultraviolet light sources, high pressure mercury lamps, low pressure mercury lamps, carbon arc lamps, black light fluorescent lamps, and metal halide lamp lamps can be used as the ultraviolet light source. As the wavelength of the ultraviolet light, a wavelength range of 1900 to 3800 通常 is mainly used, and as the electron beam source, a Cockloft-Walton type, a bande-graft type, a resonance transformer type, an insulating core transformer type, or a linear type is used. 100 to 1000 KeV, preferably 100 to 300 K, using various electron beam accelerators of dynamitron type and high frequency type lamps.
A device that irradiates electrons having energy of eV can be used.

The ionizing radiation-curable resin forming the surface protective layer 21 includes a radical polymerizable unsaturated group such as a (meth) acryloyl group and a (meth) acryloyloxy group, or a cationic group such as an epoxy group in a molecule. It is composed of a monomer, a prepolymer or a polymer having a polymerizable functional group (hereinafter, these are collectively referred to as a compound). These monomers, prepolymers, and polymers may be used alone or
Alternatively, a mixture of plural kinds is used. In this specification, (meta)
Acrylate means 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 shared, acrylate is faster in terms of the rate of crosslinking and curing by ionizing radiation.
Acrylates are more advantageous for the purpose of curing efficiently in a short time.

Examples of the prepolymer having a cationically polymerizable functional group include epoxy resins such as bisphenol type epoxy resin, novolak type epoxy resin and alicyclic type 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.

The polyfunctional monomers having a radical polymerizable unsaturated group include 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.

The above-mentioned ionizing radiation-curable resin cures sufficiently when irradiated with an electron beam, but when it is cured by irradiating ultraviolet rays, a photopolymerization initiator is added as a sensitizer. Photopolymerization initiator in the case of a resin system having a radical polymerizable unsaturated group, acetophenones, benzophenones, thioxanthones, benzoin, benzoin methyl ether,
Michler benzoyl benzoate, Michler ketone, diphenyl sulfide, dibenzyl disulfide, diethyl oxide, triphenyl biimidazole, isopropyl-N, N-dimethylamino benzoate and the like can be used alone or in combination. In the case of a resin having a cationically polymerizable functional group, an aromatic diazonium salt, an aromatic sulfonium salt, a metallocene compound, a benzoinsulfonic acid ester, a freeloxysulfoxonium diallyliodosyl salt, or the like is used alone or as a mixture. be able to. Incidentally, the amount of the photopolymerization initiator added is generally 0.1 to 100 parts by weight of the ionizing radiation-curable resin.
It is about 1 to 10 parts by weight. As a method for forming a protective layer with the ionizing radiation-curable resin, for example, a solution of the ionizing radiation-curable resin, a gravure coating method,
It can be formed by coating by a known coating method such as a roll coating method. In this case, the coating amount is suitably about 5 to 30 g / m ² as a solid content, and more preferably 15 to 25 g / m ² .

When the surface protective layer 21 made of an ionizing radiation-curable resin is to be further provided with scratch resistance and abrasion resistance, powdery aluminum oxide, silicon carbide,
Silicon dioxide, calcium titanate, barium titanate,
It can be achieved by adding an abrasive such as magnesium pyroborate, zinc oxide, silicon nitride, zirconium oxide, chromium oxide, iron oxide, boron nitride, diamond, gold sand and glass fiber. An appropriate ratio of the abrasive to 100 parts by weight of the ionizing radiation-curable resin is 1 to 80 parts by weight.

Next, the floor covering decorative materials 1 and 1 'of the present invention are:
In order to improve the adhesive strength between the synthetic resin transparent sheet 22 and the surface protective layer 21, the synthetic resin transparent sheet
The primer layer 5 (FIG. 3,
4) can also be provided. As the primer layer, a copolymer of acrylic resin and urethane resin,
It is formed of a resin comprising isocyanate. That is, the copolymer of the acrylic resin and the urethane resin includes 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 C). It is obtained by mixing and reacting to form a prepolymer, and further adding a chain extender (component D) such as a diamine 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 primer layer 5 (see FIGS. 3 and 4) is obtained by reacting the terminal hydroxyl group of the acrylic-polyester urethane copolymer with the isocyanate and curing it.

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 5 (see FIGS. 3 and 4), for example, when an ionizing radiation-curable resin is used for the resin of the surface protective layer 21. Since the ionizing radiation-curable resin reacts with the conjugated double bond of the acrylic polymer, the adhesiveness between the ionizing radiation-curable resin and the ionizing radiation-curable resin can be particularly improved.

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 5 (see FIGS. 3 and 4), the urethane resin component formed by the reaction of the components B and C gives the primer layer 5 (see FIGS. 3 and 4) flexibility. It contributes to the adhesiveness with the synthetic resin transparent sheet 22. The acrylic resin component composed of an acrylic polymer contributes to the weather resistance and the blocking resistance in the primer layer 5 (see FIGS. 3 and 4). In the urethane resin, the molecular weight of the component B depends on the primer layer 5 (FIG. 3,
Polyester comprising adipic acid or a mixture of adipic acid and terephthalic acid, 3-methylpentanediol and 1,4-cyclohexanedimethanol, as long as a urethane resin capable of sufficiently exhibiting flexibility can be obtained. In the case of a diol, it is preferably from 500 to 5000 (weight average molecular weight).

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.

To the acrylic-polyester urethane copolymer is added a isocyanate, and a coating liquid adjusted to a necessary viscosity in consideration of a coating method and a coating amount (after drying), for example, gravure The primer layer 5 (see FIGS. 3 and 4) can be formed by applying a known coating method such as a coating method or a roll coating method.
The coating amount of the primer layer 5 (see FIGS. 3 and 4) after drying is suitably 1 to ²⁰ g / m ² , preferably 1 to 5 g / m ^2.
g / m ² . In addition, the primer layer 5 (see FIGS. 3 and 4) 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, lysine diisocyanate monomer,
Alternatively, a multimer such as a dimer or trimer thereof, or a polyisocyanate such as a derivative (adduct) obtained by adding these isocyanates to a polyol can be given.

The adhesive (not shown) for bonding the decorative sheet 2 and the synthetic resin moisture-proof sheet 4 to the wood-based substrate 3 is, for example, acrylic, vinyl acetate, urethane or the like. By using an adhesive made of a resin such as an epoxy resin, both can be easily bonded.

Next, specific examples of the decorative sheet used for the decorative materials 1 and 1 'for flooring of the present invention will be described. FIG. 3 is a cross-sectional view showing a specific example of a decorative sheet used for a decorative material for flooring according to the present invention. The decorative sheet 2 ′ is one of means for imparting a decorative property to the decorative sheet 2. This is an embodiment, specifically, embossing is performed on one surface of the transparent sheet 22 made of synthetic resin to form an uneven pattern.
After 60 is provided, after wiping is performed from above and the wiping ink 70 is filled in the concave portion of the uneven pattern 60,
A primer layer 5 is provided on the entire exposed surface.
A surface protective layer 21 made of an ionizing radiation-curable resin is formed thereon, and a pattern layer 80 and a solid print layer 81 are formed on the other surface of the synthetic resin transparent sheet 22 via a primer layer 51. This decorative sheet 2 ′ is
The solid printing layer 81 surface and one surface of the wood-based base material 3 are bonded together via an adhesive (not shown) to provide a decorative material for flooring of the present invention.

FIG. 4 is a cross-sectional view showing another specific example of a decorative sheet used for a decorative material for flooring according to the present invention. The decorative sheet 2 ″ gives the decorative sheet 2 a design. It shows an aspect of another means to be performed, specifically, at least one surface of the synthetic resin sheet 22 'is subjected to an easy adhesion treatment such as a corona discharge treatment, a plasma treatment, an ozone treatment, A primer layer 52 is provided on an easily-adhesion-treated surface (not shown), and a solid printing layer 81 and a picture layer 80 are sequentially formed on the primer layer 52 by printing, and a two-component curable urethane resin or the like is further formed on the picture layer 80. A transparent sheet made of synthetic resin through an adhesive layer 90 formed of an adhesive for dry lamination
22 is bonded by a well-known dry lamination method, and the surface of the synthetic resin transparent sheet 22 is embossed to form a concavo-convex pattern 60. Thereafter, the concavo-convex pattern is formed in the same manner as the decorative sheet 2 ′ shown in FIG. After a wiping process is applied from above to fill the recesses of the concavo-convex pattern 60 with the wiping ink 70, a primer layer 5 is provided on the surface, and the primer layer 5
A surface protective layer 21 made of an ionizing radiation curable resin is formed thereon. This decorative sheet 2 ″ is formed by bonding the synthetic resin sheet 22 ′ of the decorative sheet 2 ″ and one surface of the wooden base material 3 via an adhesive (not shown),
It can be used as the decorative material for flooring of the present invention. by the way,
As the synthetic resin sheet 22 ', a colored sheet is generally used, but may be an uncolored sheet. The synthetic resin sheet 22 'may be the same as the synthetic resin transparent sheet 22 described above, and may be an olefin-based thermoplastic resin for the same reason as described for the synthetic resin transparent sheet 22. Is preferred.

Next, the primer layer 51 provided on the other surface of the synthetic resin transparent sheet 22 shown in FIG. 3 is composed of the synthetic resin transparent sheet 22 made of an olefin-based thermoplastic resin and the picture layer 80 or the solid printing layer. It is provided to improve the adhesiveness to the printing layer such as 81, and it is preferable to use the same resin as the primer layer 5 described above, and the forming method is the same as the method for forming the primer layer 5. . The primer layer 52 provided on the synthetic resin sheet 22 'shown in FIG.
In order to improve the adhesiveness with a printed layer such as the above, when the synthetic resin sheet 22 ′ is made of an olefin-based thermoplastic resin, the same resin as the above-described primer layer 5 is used. Preferably, the forming method is the same as the forming method of the primer layer 5.

The concavo-convex pattern 60 can be formed by hot pressing, hairline processing, or the like. Examples of the concavo-convex pattern 60 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 picture layer 80 and the solid printing layer
81 can be generally formed using ink by a known printing method such as gravure printing, offset printing, or silk screen printing. The pattern layer 80 is, for example, a wood pattern, a stone pattern, a cloth pattern, a leather crest 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. 3 and 4 show a configuration in which both the picture layer 80 and the solid printing layer 81 are provided, but either one of them may be used.

The picture layer 80 and the solid printing layer
As the ink used in 81, as a vehicle, chlorinated polyethylene, chlorinated polyolefin such as chlorinated polypropylene, polyester, polyurethane composed of isocyanate and polyol, polyacryl, polyvinyl acetate,
One or more kinds of polyvinyl chloride, vinyl chloride-vinyl acetate copolymer, cellulose resin, polyamide resin, etc. are mixed and used to form an ink by adding pigments, solvents, and various auxiliaries. However, considering environmental issues, polyester, polyurethane composed of isocyanate and polyol, polyacrylic, polyvinyl acetate, cellulosic resin, non-chlorine type mixed with two or more kinds of polyamide type resin, etc. A vehicle is suitable, and more preferably, one or two or more of polyester, polyurethane composed of isocyanate and polyol, polyacryl, polyamide resin and the like are mixed.

The decorative sheets 2 'and 2''shown in FIGS. 3 and 4 are specific examples of the decorative sheet used for the decorative material for flooring according to the present invention. The present invention is not limited to this as long as it does not depart from the gist of the invention.

[0041]

Next, the present invention will be described in more detail with reference to the following examples. Example 1 A polypropylene film of 120 μm having both surfaces subjected to corona discharge treatment [150AG3 manufactured by Mitsubishi Chemical MKV Corporation]
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) is applied to one surface (back side) of the above by a gravure coating method so that the solid content becomes 2 g / m ^2. To form a printing primer layer, and on the printing primer layer, a gravure printing method using a printing ink comprising an acrylic-urethane resin (a resin obtained by adding 5 parts by weight of hexamethylene diisocyanate to 100 parts by weight of an acrylic polyol). A pattern print layer and a solid print layer were formed. After that, a concave portion was provided with an embossed plate on the other surface (surface) of the polypropylene film (150AG3 manufactured by Mitsubishi Chemical MKV Corporation) so as to correspond to the conduit portion of the wood-grained pattern print layer. -Sepia-colored wiping ink consisting of urethane resin (resin obtained by adding 5 parts by weight of hexamethylene diisocyanate to 100 parts by weight of acrylic polyol) is filled and dried, and acryl-urethane resin (100 parts by weight of acrylic polyol is added) Resin to which 5 parts by weight of hexamethylene diisocyanate is added] The solution has a solid content of 2 g / m ² by a gravure coating method.
To form a primer layer for a surface protective layer, and thereafter, an ionizing radiation-curable resin [manufactured by Dainichi Seika Kogyo: EBF-04] is applied on the primer layer for a surface protective layer by a roll coating method. After coating, drying and electron beam (175KeV, 5Mr
ad) was irradiated to produce a decorative sheet having a surface protective layer having a solid content of 20 g / m ² . This decorative sheet was glued along a surface shape of a 12 mm thick plywood having a V-shaped cross section formed on the surface thereof by a V groove processing machine separately prepared so that the surface protective layer was exposed. Rika Bond manufactured by Rika Co., Ltd.
An adhesive obtained by adding BA-10B (5 parts by weight) to BA-10A (100 parts by weight) is applied in a wet state at a rate of 65 g / m ² to obtain a decorative material for flooring of the present invention. Was.

Comparative Example 1 Using the decorative sheet prepared in Example 1, an adhesive [Likabond manufactured by Chuo Rika Co., Ltd.] was attached to a separately prepared 12 mm thick plywood such that the surface protective layer of the decorative sheet was exposed. BA-10A (1
00 parts by weight) and an adhesive containing BA-10B (5 parts by weight) added thereto in a wet state at a coating rate of 65 g / m ² ] and a V-grooving machine on the surface protective layer side of the decorative sheet. To form a groove having a V-shaped cross section, and apply a sepia paint made of an acrylic-urethane resin (a resin obtained by adding 5 parts by weight of hexamethylene diisocyanate to 100 parts by weight of acrylic polyol) to the groove. Thus, a decorative material for flooring as a comparative example was obtained.

With respect to the flooring decorative materials of Example 1 and Comparative Example 1 prepared above, abrasion resistance and abrasion resistance tests were performed by the following methods, and the evaluation results are shown in Table 1. It is shown together.

[0044] * 1: Abrasion resistance test-Attach gauze impregnated with methyl ethyl ketone to the hemispherical tip of a jig having a hemispherical tip with a radius of 0.5 inch, and use it for flooring so as to cross the V-shaped groove. The color of the gauze is visually evaluated by reciprocating the surface of the decorative material 20 times with a load of 500 g. * 2: Scratch resistance test-claws the surface of the decorative material for flooring so as to cross the V-shaped groove. 20 times reciprocation and visually evaluate surface scratches and gloss change

[0045]

According to the present invention, as described so far,
It has excellent surface properties such as scratch resistance, abrasion resistance, water resistance, and stain resistance, and in particular, the grooved portion that has been subjected to groove processing, which has been a problem in conventional flooring decorative materials, has poor water resistance. And a flooring decorative material which does not cause a problem such as discoloration over time or the like. In addition, since it is possible to eliminate a rather complicated and time-consuming selective application operation which has conventionally been performed on a groove, a flooring decorative material having a groove can be provided at a low cost.

[Brief description of the drawings]

FIG. 1 is a sectional view schematically showing a first basic configuration of a decorative material for flooring according to the present invention.

FIG. 2 is a sectional view schematically showing a second basic configuration of the decorative material for flooring according to the present invention.

FIG. 3 is a cross-sectional view showing a specific example of a decorative sheet used for a decorative material for flooring according to the present invention.

FIG. 4 is a cross-sectional view showing another specific example of a decorative sheet used for a decorative material for flooring according to the present invention.

[Explanation of symbols]

 1,1 'decorative material for flooring 2,2', 2 '' decorative sheet 3 wood-based base material 4 synthetic resin moisture-proof sheet 5,51,52 primer layer 10 V groove processing 11 C surface processing 12 female real 13 male Real 21 Surface protective layer 22 Synthetic resin transparent film 22 'Synthetic resin sheet 60 Concavo-convex pattern 70 Wiping ink 80 Picture layer 81 Solid printing layer 90 Adhesive layer

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2B250 AA05 BA03 BA05 BA06 CA11 DA04 EA02 EA13 EA18 FA09 FA18 FA21 FA28 FA31 FA33 FA37 GA03 4F100 AK01B AK01C AK01D AK03B AK07 AK25G AK51G AL01G AP00A AT00 BA03 BA04 BA03 BA04 BA03 BA04 EJ65B GB08 HB00B HB01 HB31 JB07 JB14C JB16B JB16D JD04D JK09 JK16 JL02 JN01B

Claims (5)

[Claims] 1. A flooring decorative material in which a decorative sheet is bonded along a surface shape of a wooden base material having at least a grooved surface, wherein the decorative sheet is made of an ionizing radiation-curable resin on a surface layer. A decorative material for flooring, comprising a transparent sheet made of a synthetic resin having a surface protective layer. 2. The method according to claim 1, wherein the surface protective layer is formed on the synthetic resin transparent sheet via a primer layer formed of an acrylic resin / urethane resin copolymer and isocyanate. The decorative material for flooring according to the above. 3. The transparent sheet made of synthetic resin is made of an olefin-based thermoplastic resin.
The decorative material for flooring according to any one of the above. 4. The floor covering decorative material according to claim 1, wherein a synthetic resin moisture-proof sheet is adhered to the back surface of said wood-based base material. 5. The floor covering decorative material according to claim 4, wherein the synthetic resin moisture-proof sheet is made of an olefin-based thermoplastic resin.