JP2006281544A - Floor decorative material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a floor decorative material having a uniform smooth feeling, damage resistance and design properties and also having excellent moisture absorption resistance. <P>SOLUTION: The floor decorative material is constituted by laminating a synthetic resin layer with a thickness of 100 μm or above and a decorative sheet on a woody sheet and characterized in that (1) both of the woody sheet and the synthetic resin layer of the floor decorative material have exposed curved surfaces formed by at least one of chamfering processing and groove processing and (2) the curved surfaces are coated with a coating film comprising water-resistant ink. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a floor decorative material.

  2. Description of the Related Art Conventionally, as a decorative material for floors, a material in which a decorative sheet is stuck on a base material made of a wooden board is well known. For example, Patent Document 1 discloses a wooden decorative board in which a decorative sheet having a thin surface layer of natural wood is attached on a substrate made of a wooden board, and a backing sheet is attached to the other surface. There is disclosed a wooden decorative board for flooring, wherein the sheet is made of a layer that is difficult to permeate the wooden resin liquid that exudes from the wooden board.

The floor decorative material is required to have physical properties such as uniform smoothness (flat feeling), scratch resistance (impact resistance, caster resistance, etc.), moisture absorption resistance, etc., and has excellent design properties. It is desirable. In particular, moisture absorption resistance is important from the viewpoint of preventing deformation of the flooring decorative material, but it tends to decrease when groove processing, chamfering processing, etc. are performed for improving design properties.
JP 2000-190309 A

  The present invention provides a floor decorative material having uniform smoothness, scratch resistance, and design properties and excellent moisture absorption resistance.

  As a result of intensive studies, the present inventor has found that the above object can be achieved when a specific layer and a processed surface are formed on a flooring decorative material, and has completed the present invention.

  That is, the present invention relates to the following floor decorative material.

1. A floor decorative material in which a synthetic resin layer having a thickness of 100 μm or more and a decorative sheet are laminated on a wooden board,
(1) The floor decorative material has a curved surface formed by at least one of chamfering and grooving, in which both the wooden board and the synthetic resin are exposed,
(2) The curved surface is covered with a coating film made of water-resistant ink.
A decorative material for floors.

  2. The floor decorative material according to Item 1, wherein the curved surface is a curved surface formed by chamfering, and is formed at an end of the floor decorative material.

  3. Item 3. The floor decorative material according to Item 1 or 2, wherein the curved surface is a curved surface bulging toward the outside of the floor decorative material.

  4). Item 4. The floor decorative material according to any one of Items 1 to 3, wherein the curved surface where both the synthetic resin and the wooden board are exposed includes a boundary line where the synthetic resin and the wooden material are in contact with each other.

  5. Item 5. The floor decorative material according to any one of Items 1 to 4, wherein the synthetic resin layer is a layer containing amorphous polyethylene terephthalate.

  6). The synthetic resin layer has a single layer or a layer structure of two or more layers. A) In the case of a single layer, or b) In the case of two or more layers, at least the uppermost layer of the synthetic resin layer is A- Item 5. The floor decorative material according to any one of Items 1 to 4, which is a mixed layer containing PET and PETG.

  In the decorative material for floor according to the present invention, a synthetic resin layer having a thickness of 100 μm or more and a decorative sheet are laminated. The portions covered with these layers and sheets have a good flat feeling and high moisture absorption resistance.

  The floor decorative material of the present invention has a curved surface formed by at least one of chamfering and grooving and exposing both a wooden board and a synthetic resin. The chamfered portion and the groove portion are curved surfaces (in particular, a curved surface that bulges toward the outside of the flooring decorative material (that is, a curved surface that does not form a dent in the flooring decorative material), and a curved surface that bulges toward the slot. Therefore, the flooring decorative material has a soft design with a rich three-dimensional effect. Moreover, since a processed surface is a curved surface, the floor surface obtained by connecting two or more such flooring decorative materials is excellent in a walk feeling.

  In the decorative material for floors of the present invention, the curved surface formed by at least one of chamfering and grooving is covered with a coating film made of water-resistant ink, and therefore has good moisture absorption resistance.

  In the floor decorative material of the present invention, a synthetic resin layer having a thickness of 100 μm or more is laminated on a wooden board, and the surface of the floor decorative material has a uniform smooth feeling, good scratch resistance, and the like. Further, by laminating the synthetic resin layer, the flooring decorative material has good design properties (innocence and stereoscopic effect).

1. Floor decorative material The floor decorative material of the present invention is a floor decorative material in which a synthetic resin layer having a thickness of 100 μm or more and a decorative sheet are laminated on a wooden board,
(1) The flooring decorative material has a curved surface formed by at least one of chamfering and grooving, in which both the wooden board and the synthetic resin are exposed,
(2) The surface is covered with a coating film made of water-resistant ink.
It is characterized by that.

  Examples of the wood board used in the present invention include a wood board made of wood such as cedar, straw, lawan, teak, etc., a wood board such as particle board, medium density fiber board (MDF).

(Wood board)
Although the thickness of a wooden board is not specifically limited, About 3-15 mm is preferable and about 6-12 mm is more preferable.

(Synthetic resin layer)
A synthetic resin layer (so-called backer layer) having a thickness of 100 μm or more is laminated on the wooden board. The thickness of the synthetic resin layer may be 100 μm or more, but is preferably 250 μm or more. As an upper limit, it is about 800 micrometers, and 500 micrometers or less are preferable. The synthetic resin layer imparts a uniform smoothness, good scratch resistance, and the like to the surface of the floor decorative material. Further, by laminating the synthetic resin layer, the flooring decorative material has good design properties (innocence and stereoscopic effect).

  The synthetic resin layer in the flooring may be a single layer or may be composed of two or more layers. In the case of two or more layers, the lamination method may be a known method such as an extrusion method.

  The material of the synthetic resin layer is not particularly limited. For example, polyethylene (high density polyethylene, medium density polyethylene, low density polyethylene), vinyl chloride resin, polystyrene, polypropylene, methacrylic resin, acrylonitrile styrene resin, polyamide resin, acrylonitrile butadiene styrene resin, polyimide resin, polyamideimide resin, fluorine resin, Examples include urethane resin, polysulfone, polycarbonate, polyacetal, polyphenylene ether, polyethylene naphthalate (PEN), polybutylene terephthalate (PET), and polyarylate. Amorphous polyethylene terephthalate, so-called A-PET [Mitsubishi Chemical Corporation: Nova Clear (trade name)], PETG, and the like can also be suitably used. Among these, this invention coating material can be used suitably for the layer containing an amorphous polyethylene terephthalate (A-PET).

  In particular, it is desirable that the synthetic resin layer has a layer structure of one layer (single layer) or two or more layers, and the uppermost layer is a mixed layer containing A-PET and PETG or PEN. That is, in the case of a single layer, the single layer, and in the case of two or more layers, the layer closest to the decorative layer needs to be the mixed layer. This uppermost layer is laminated on the decorative sheet via an adhesive layer and / or a primer layer. In this invention, it becomes possible to improve adhesiveness with a decorative sheet more by making the uppermost layer into the said mixed layer. In the case of a single layer, the single layer is a mixed layer.

  When the synthetic resin layer has a layer structure of three or more layers, it is desirable that at least the uppermost layer and the lowermost layer are a mixed layer containing A-PET and PETG or PEN. Thereby, not only the adhesiveness with a decorative sheet but the adhesiveness of a synthetic resin layer and a wooden board can also be improved. The uppermost layer is the layer closest to the decorative sheet as described above. The lowest layer refers to the layer closest to the wooden board to be laminated.

  As a preferred form of the synthetic resin layer, for example, (1) the synthetic resin layer has a layer structure consisting of three layers, and (2) the uppermost layer and the lowermost layer contain A-PET and PETG or PEN. There is a decorative sheet for flooring, which is a layer and the core layer is a layer made of A-PET.

  The mixed layer contains A-PET and PETG or PEN, but may contain other resin components. Examples thereof include polyester resins such as polyethylene naphthalate, polybutylene terephthalate, and polyarylate. In the present invention, a two-component mixed layer composed of A-PET and PETG or PEN is particularly preferable. Even in the case of a two-component system, additives other than the polyester resin may be included.

  The content of A-PET and PETG or PEN in the mixed layer can be appropriately set according to the grade of each component, the use conditions of the sheet of the present invention, and the like. In the sheet of the present invention, in the above two-component system, it is desirable that PETG or PEN is about 20 to 80% by weight, particularly 40 to 60% by weight, in a total of 100% by weight of A-PET and PETG or PEN.

  The wood board and the synthetic resin layer are desirably laminated via, for example, a urethane adhesive layer and / or a urethane primer layer.

  The floor decorative material of the present invention is preferably subjected to a water resistance treatment on the surface not covered with the synthetic resin layer or the decorative sheet. Thereby, water resistance can be improved more. The water-resistant treatment can be performed using, for example, a known water-resistant ink (including a pigment or the like as necessary).

(Decorative sheet)
The type of the decorative sheet used in the present invention is not particularly limited. For example, a decorative sheet formed by sequentially laminating a pattern layer (solid ink layer / pattern ink layer), a transparent resin layer, and a surface protective layer on a base sheet is preferable. . Hereinafter, the decorative sheet will be described.

  The base sheet is made of thin paper, fine paper, kraft paper, Japanese paper, titanium paper, resin-impregnated paper, paper reinforced paper, wood fiber, glass fiber, asbestos, polyester fiber, vinylon fiber, rayon fiber, etc. One type or two or more types of laminates such as a woven fabric, a non-woven fabric, a sheet made of synthetic resin such as polyolefin, polyester, polyacryl, polyamide, polyurethane, and polystyrene can be used. As a thickness of a base material sheet, 20-300 micrometers is suitable in general. Further, the base sheet may be appropriately colored by adding a pigment or the like, and further, a necessary surface may be subjected to corona discharge treatment, plasma treatment, ozone treatment, or the like.

  The pattern layer is composed of a pattern ink layer and a solid ink layer. The pattern layer can be formed using ink by a printing method such as gravure printing, offset printing, silk screen printing or the like. Examples of the pattern ink layer include a wood grain pattern, a stone pattern, a cloth pattern, a skin pattern, a geometric pattern, characters, symbols, line drawings, and various abstract pattern patterns. The solid ink layer is obtained by solid printing with a concealing colored ink. The pattern layer may be both a pattern ink layer and a solid ink layer, or one of them.

  As the ink used for the pattern layer, as a vehicle, chlorinated polyolefin such as chlorinated polyethylene and chlorinated polypropylene, polyester, polyurethane composed of isocyanate and polyol, polyacryl, polyvinyl acetate, polyvinyl chloride, and vinyl chloride-vinyl acetate are used. A polymer, a cellulose-based resin, a polyamide-based resin, or the like may be used alone or in combination, and a pigment, a solvent, various auxiliary agents, and the like may be added thereto to make an ink. Among these, in consideration of environmental problems, adhesion to the surface to be printed, and the like, a mixture of one or more of polyester, polyurethane composed of isocyanate and polyol, polyacryl, polyamide-based resin, and the like is preferable.

  A transparent resin layer will not be specifically limited if it is a transparent resin layer, For example, it can form suitably with a transparent thermoplastic resin.

  Specifically, soft, semi-rigid or rigid polyvinyl chloride, polyethylene terephthalate, polybutylene terephthalate, polyamide, polyethylene, polypropylene, ethylene-vinyl acetate copolymer, ethylene-acrylic acid copolymer, ethylene-acrylic acid ester copolymer Examples include polymers, ionomers, acrylic esters, and methacrylic esters. Among the above, polyolefin resins such as polypropylene are preferable.

  The transparent resin layer may be colored. In this case, a colorant may be added to the thermoplastic resin. As the coloring material, pigments or dyes used in the picture layer can be used.

  For the transparent resin layer, fillers, matting agents, foaming agents, flame retardants, lubricants, antistatic agents, antioxidants, UV absorbers, light stabilizers, radical scavengers, soft components (eg rubber) Various additives such as may be included.

  The surface protective layer is provided for imparting surface physical properties such as scratch resistance, abrasion resistance, water resistance, and stain resistance required for the decorative sheet. As the resin for forming the surface protective layer, a curable resin such as a thermosetting resin or an ionizing radiation curable resin is preferable. In particular, ionizing radiation curable resins are preferable from the viewpoint of high surface hardness, productivity, and the like.

  Examples of thermosetting resins include unsaturated polyester resins, polyurethane resins (including two-component curable polyurethane), epoxy resins, amino alkyd resins, phenol resins, urea resins, diallyl phthalate resins, melamine resins, guanamine resins, and melamines. -Urea co-condensation resin, silicon resin, polysiloxane resin and the like.

  A curing agent such as a crosslinking agent and a polymerization initiator, and a polymerization accelerator can be added to the resin. For example, as curing agents, isocyanates, organic sulfonates, etc. can be added to unsaturated polyester resins, polyurethane resins, etc., organic amines, etc. can be added to epoxy resins, peroxides such as methyl ethyl ketone peroxide, azoisobutyl nitrile, etc. A radical initiator can be added to the unsaturated polyester resin.

  Examples of the method for forming the surface protective layer with a thermosetting resin include a method in which a solution of a thermosetting resin is applied by a coating method such as a roll coating method or a gravure coating method and then dried and cured. The coating amount of the solution is about 5 to 30 μm, preferably about 15 to 25 μm in terms of solid content.

  The ionizing radiation curable resin is not limited as long as it is a resin that undergoes a cross-linking polymerization reaction by irradiation with ionizing radiation and changes to a three-dimensional polymer structure. Ionizing radiation means an electromagnetic wave or charged particle beam having an energy quantum capable of polymerizing and crosslinking molecules, such as visible light, ultraviolet light (near ultraviolet light, vacuum ultraviolet light, etc.), X-rays, electron beams, ion beams. In particular, it is desirable to use ultraviolet rays, electron beams, and the like.

  As the ultraviolet light source, a light source such as an ultra-high pressure mercury lamp, a high pressure mercury lamp, a low pressure mercury lamp, a carbon arc lamp, a black light fluorescent lamp, or a metal halide lamp can be used. As the wavelength of the ultraviolet light, a wavelength range of about 190 to 380 nm can be used. As the electron beam source, various electron beam accelerators such as a cockcroft-wald type, a bandegraft type, a resonant transformer type, an insulating core transformer type, a linear type, a dynamitron type, and a high frequency type can be used. As an electron beam, a thing of about 100-1000 keV generally, Preferably the thing of 100-300 keV can be used. The irradiation amount of the electron beam is usually about 2 to 15 Mrad.

  The ionizing radiation curable resin is a monomer, prepolymer or polymer having a radically polymerizable unsaturated group such as (meth) acryloyl group, (meth) acryloyloxy group, or a cationically polymerizable functional group such as epoxy group in the molecule. A polymer (hereinafter collectively referred to as a compound). These monomers, prepolymers, and polymers can be used alone or in combination. In this specification, (meth) acrylate is used in the meaning of 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. This prepolymer usually has a molecular weight of about 10,000 or less. When 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 acrylate and methacrylate can be used in common, the acrylate is more advantageous for the purpose of curing efficiently at a high speed and in a short time because the acrylate is faster in terms of the crosslinking curing rate with ionizing radiation.

  Examples of the prepolymer having a cationically polymerizable functional group include epoxy resins such as bisphenol type epoxy resins, novolac type epoxy resins, and alicyclic epoxy resins, aliphatic vinyl ethers, aromatic vinyl ethers, urethane vinyl ethers, and ester vinyl ethers. And prepolymers such as vinyl ether resins, cyclic ether compounds, and spiro compounds.

  As a monomer having a radical polymerizable unsaturated group, for example, as a monofunctional monomer of a (meth) acrylate compound, 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, isobornyl (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, Examples include 2- (meth) acryloyloxypropyl hydrogen terephthalate.

  Examples of the polyfunctional monomer having a radical polymerizable unsaturated group include ethylene glycol di (meth) acrylate, diethylene glycol di (meth) acrylate, triethylene glycol di (meth) acrylate, and 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) a Relate, pentaerythritol tri (meth) acrylate, pentaerythritol tetra (meth) acrylate, dipentaerythritol penta (meth) acrylate, dipentaerythritol hexa (meth) acrylate, glycerin polyethylene oxide tri (meth) acrylate, tris (meth) acryloyl Examples thereof include oxyethyl phosphate. As the monomer having a cationic polymerizable functional group, a prepolymer monomer having the cationic polymerizable functional group can be used.

  The ionizing radiation curable resin is sufficiently cured when irradiated with an electron beam. However, when it is cured by irradiation with ultraviolet rays, a photopolymerization initiator is added as a sensitizer. Photopolymerization initiators in the case of resin systems having radically polymerizable unsaturated groups include, for example, acetophenones, benzophenones, thioxanthones, benzoin, benzoin methyl ether, Michler benzoylbenzoate, Michler ketone, diphenyl sulfide, dibenzyl disulfide , Diethyl oxide, triphenylbiimidazole, isopropyl-N, N-dimethylaminobenzoate and the like can be used. In the case of a resin system having a cationic polymerizable functional group, for example, at least one kind such as an aromatic diazonium salt, an aromatic sulfonium salt, a metallocene compound, a benzoin sulfonic acid ester, and a freeloxysulfoxonium diallyl iodosyl salt. Can be used.

  Although the addition amount of a photoinitiator is not specifically limited, Generally it is about 0.1-10 weight part with respect to 100 weight part of ionizing radiation curable resins.

  As a method for forming a protective layer with an ionizing radiation curable resin, for example, a solution of an ionizing radiation curable resin may be applied by a coating method such as a gravure coating method or a roll coating method. The coating amount of the solution is generally about 5 to 30 μm, preferably about 15 to 25 μm as a solid content.

  In order to further impart scratch resistance and abrasion resistance to the surface protective layer formed from the ionizing radiation curable resin, an inorganic filler may be blended. Examples of inorganic fillers include powdered aluminum oxide, silicon carbide, silicon dioxide, calcium titanate, barium titanate, magnesium pyroborate, zinc oxide, silicon nitride, zirconium oxide, chromium oxide, iron oxide, boron nitride, Examples include diamond, gold sand and glass fiber.

  The addition amount of the inorganic filler is about 1 to 80 parts by weight with respect to 100 parts by weight of the ionizing radiation curable resin.

  Lamination of each layer is, for example, by forming a pattern layer (solid ink layer, pattern ink layer) on one side of the base sheet by printing in order, and then bonding a known dry lamination such as a two-component curable urethane resin on the pattern layer. A transparent resin layer can be laminated by a dry lamination method, a T-die extrusion method or the like via an agent, and a surface protective layer can be formed.

  An uneven pattern may be formed by embossing from the surface protective layer side. The concavo-convex pattern can be formed by heating press, hairline processing or the like. Examples of the uneven pattern include a conduit groove, a stone plate surface unevenness, a cloth surface texture, a satin finish, a grain, a hairline, and a line groove.

(Curved surface)
The floor decorative material of the present invention has a curved surface formed by at least one of chamfering and grooving and exposing both the wooden board and the synthetic resin. Both chamfering and grooving can be performed with a known tool such as a tenoner or a gang saw.

  Specifically, a vertical groove, a horizontal groove, and the like formed from a curved surface can be given. Moreover, the chamfered part comprised from the curved surface formed in the edge part of the decorative material for floors, etc. are mentioned.

  Grooves such as vertical grooves and horizontal grooves are often formed on floor decorative materials, but walking on the floor surface to which floor decorative materials are applied by using curved surfaces as the surfaces constituting the grooves. The feeling can be enhanced. In the case of a curved surface, a soft design with a rich three-dimensional effect is added as compared with a conventional V-shaped shape.

  Both the wood board and the synthetic resin are exposed on the curved surface. Since such an exposed surface has high hygroscopicity, it is necessary to make the floor decorative material fully resistant to moisture absorption. Therefore, the floor decorative material of the present invention covers the curved surface with a coating film made of water-resistant ink. The water-resistant ink is not particularly limited as long as good water resistance can be imparted to the exposed surface. For example, a water-resistant ink containing an acrylic urethane resin as a resin component is preferable. Hereinafter, the water-resistant ink will be described.

2. Water-resistant ink The water-resistant ink contains an acrylic urethane resin as a resin component. It does not specifically limit as acrylic urethane type resin, A well-known thing or a commercial item can also be used. For example, a reaction product of an acrylic polyol and an isocyanate compound, a compound obtained by crosslinking an acrylic resin having a functional group and a urethane resin having a functional group, and the like can be given.

  In particular, the acrylic urethane resin is a keto group-containing acrylic resin in that high adhesion to a synthetic resin layer (especially an olefin resin) is obtained together with superior water resistance, chemical resistance, scratch resistance, and the like. It is preferably obtained by mixing with a hydrazide group-containing urethane resin. By such mixing, the acrylic resin and the urethane resin are cross-linked by a keto group and a hydrazide group, and the acrylic resin and the urethane resin are combined. In this composite resin aqueous emulsion (urethane / acrylic composite emulsion), the particles of the resin are dispersed as composite particles in which the acrylic resin component is present inside the particle and the urethane resin component is present outside the particle. A commercial item can also be used as such a complex emulsion. For example, product name “Boncoat CG-5030” (manufactured by Dainippon Ink & Chemicals), two-component effect emulsion (main material: W-SF, curing agent: W-SF curing agent, both manufactured by Showa Ink Industries, Ltd.), etc. Can be used.

  Although the ratio of the acrylic resin component and the urethane resin component in the urethane / acrylic composite emulsion is not limited, the urethane resin component is preferably 20 to 40% by weight in the total 100% by weight of both. By setting to such a range, the adhesiveness with the synthetic resin layer can be further enhanced.

  The content of the acrylic urethane-based resin in the water-resistant ink can be appropriately set according to the type of the resin, but is generally about 5 to 60% by weight, particularly 20 to 40% by weight. Is desirable.

  In addition, a crosslinking degree can also be raised by using a hardening | curing agent with respect to acrylic urethane resin. For example, an isocyanate curing agent, an epoxy curing agent, a melamine curing agent, an aziridine curing agent, and the like can be given. In the present invention, it is preferable to use an isocyanate curing agent from the viewpoint that the low-temperature crosslinking performance, weather resistance, water resistance and the like can be further enhanced. The content of the curing agent is usually about 20 to 70 parts by weight with respect to 100 parts by weight of the acrylic urethane resin, although it depends on the type of the curing agent used.

  The water-resistant ink preferably contains silicon. By adding silicon, more excellent defoaming effect, water repellent effect, and the like can be obtained. The addition amount of silicon may be 0.5 to 5% by weight in the paint of the present invention.

  In the water-resistant ink, an additive contained in a known water-resistant ink can be blended. For example, colorants (pigments, dyes), viscosity modifiers, extender pigments and the like can be used.

  Although water is mainly used as the solvent in the water-resistant ink, a water-soluble organic solvent can be used in combination as necessary. For example, in addition to alcohols such as isopropyl alcohol, glycols and glycol ethers can also be used.

  What is necessary is just to determine suitably solid content content of the said water-resistant ink in the range of 5 to 80 weight% normally according to the kind etc. of component to be used.

  The water-resistant ink may be in any form such as a solution or an emulsion, but is preferably in the form of an emulsion.

  The method for forming a coating film made of water-resistant ink is not limited, and may be performed by printing or the like in addition to application by brush, roller, spray or the like. In particular, for flooring or the like, a method in which the ink applied to the entire surface of the decorative layer by application or the like is scraped off with a roller or the like after the ink applied to other than the groove portion can be suitably used.

Claims (6)

A floor decorative material in which a synthetic resin layer having a thickness of 100 μm or more and a decorative sheet are laminated on a wooden board,
(1) The floor decorative material has a curved surface formed by at least one of chamfering and grooving, in which both the wooden board and the synthetic resin are exposed,
(2) The curved surface is covered with a coating film made of water-resistant ink.
A decorative material for floors.   The floor decorative material according to claim 1, wherein the curved surface is a curved surface formed by chamfering, and is formed at an end portion of the floor decorative material.   The floor decorative material according to claim 1 or 2, wherein the curved surface is a curved surface bulging toward the outside of the floor decorative material.   The floor decorative material according to any one of claims 1 to 3, wherein the curved surface from which both the synthetic resin and the wooden board are exposed includes a boundary line where the synthetic resin and the wooden material are in contact with each other.   The flooring decorative material according to any one of claims 1 to 4, wherein the synthetic resin layer is a layer containing amorphous polyethylene terephthalate.   The synthetic resin layer has a single layer or a layer structure of two or more layers. A) In the case of a single layer, or b) In the case of two or more layers, at least the uppermost layer of the synthetic resin layer is A- The flooring decorative material according to any one of claims 1 to 4, which is a mixed layer containing PET and PETG.