JP2010082972A - Decorative material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a decorative material capable of preventing a wood surface and gloss of a woody base material from being impaired, capable of having depth feeling and irregularity feeling visually as design, and excellent in an antifouling property and abrasion resistance. <P>SOLUTION: This decorative material is laminated with a propylene-based sheet layer 2 provided with a surface protection layer 5 over the whole face formed with recessed pattern 6, to expose the surface protection layer, on one face of the woody base material 8, and a haze value of a decorative sheet 1 is 45% or more to 95% or less. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a decorative material obtained by laminating a decorative sheet used for surface decorations such as wall materials, artificial materials, building materials such as fittings, and furniture, etc., on a wooden base material.

  Traditionally, solid wood and veneer plywood, etc., are used for surface decorations such as wall materials, artificial materials, joinery materials such as joinery, and furniture. In order to improve various resistances such as scratch resistance, texture, and design properties, paint has been applied to the surface of solid wood or veneer plywood.

  However, the painting work involves many steps, such as grinding the surface of the veneer, applying a sealer, drying, applying a sealant, removing the sealant, applying a sanding sealer, drying, sanding, and applying paint. Yes (see Patent Document 1), and there is also a problem that the burden on the environment is large, such as disposal of the waste solvent in the coating process and generation of solvent odor.

  To solve this problem, the surface of the wooden base material is given light resistance, contamination resistance, abrasion resistance, scratch resistance, etc. while taking advantage of the design and texture of the wood grain. In addition, it has been proposed that a decorative sheet obtained by applying a resin coating to a transparent or translucent base paper is bonded to a wooden base material (see Patent Document 2).

However, since the decorative sheet is a paper-based substrate, there is a problem that peeling from the wooden substrate occurs when water is wet from the surface.
JP-A-62-45383 JP 2001-199295 A

  Therefore, the present invention has been made in view of the above problems, and the object of the present invention is that the bark and terry of a woody base material such as natural wood are not damaged, and the visual sense of depth and The object is to provide a cosmetic material that has an uneven feeling and is excellent in stain resistance and wear resistance.

In order to achieve the above-mentioned object, the inventor of the present invention according to claim 1 is a propylene-based sheet in which a surface protective layer is provided on the entire surface of a wood-based substrate on which a concave pattern is formed. In the decorative material formed by sticking a decorative sheet consisting of layers,
The decorative sheet has a haze degree of 45% or more and 90% or less.

  The present invention according to claim 2 is characterized in that, in the decorative material according to claim 1, a patterned low gloss printing layer is provided between the propylene-based sheet layer and the surface protective layer. is there.

  The present invention according to claim 3 is the decorative material according to any one of claims 1 and 2, wherein the surface protective layer is made of a curable resin.

  According to a fourth aspect of the present invention, in the decorative material according to the third aspect, the curable resin is an ionizing radiation curable resin.

  The decorative material of the present invention can express the natural texture unique to natural wood by utilizing the bark and terry of woody base materials such as natural wood as it is, and has a sense of depth and unevenness visually. A design effect can be expressed, and at the same time, an effect excellent in stain resistance and wear resistance is exhibited.

The above-described present invention will be described in detail below with reference to the drawings.
FIG. 1 is a layer configuration diagram schematically illustrating a first embodiment of a cosmetic material according to the present invention, and FIG. 2 is a layer configuration diagram schematically illustrating a second embodiment of the cosmetic material according to the present invention. 1, 11 is a decorative sheet, 2 is a propylene-based sheet layer, 3 is a primer layer, 4 is a patterned low gloss printing layer, 5 is a surface protective layer, 6 is a concave pattern, 7 is an adhesive layer, and 8 is a woody system Each substrate is shown.

  FIG. 1 is a schematic diagram showing a layer structure of a first embodiment of a decorative material according to the present invention. The decorative sheet 1 has one surface of the propylene-based sheet layer 2 provided with a concave pattern 6 on one surface. The primer layer 3 is provided on the entire surface, the surface protective layer 5 is provided on the entire surface of the primer layer 3 and laminated, and the wood base material 8 is laminated via the adhesive layer 7. By comprising in this way, the wooden base material 8 and the recessed pattern 6 will be arrange | positioned through the propylene-type sheet | seat layer 2, and the design effect with a feeling of depth (depth) can be expressed.

  FIG. 2 is a layer configuration diagram schematically showing a second embodiment of the decorative material according to the present invention. As a decorative sheet 11, a patterned low-gloss printing layer is provided between the primer layer 3 and the surface protective layer 5. 4 except that this is the same as the decorative material 1 of the first embodiment. By comprising in this way, in addition to the effect of 1st Embodiment, the part of the pattern-like low gloss printing layer 4 is visually recognized as a recessed part, and the design effect with an unevenness | corrugation feeling can be expressed. In FIGS. 1 and 2, a conduit groove is appropriate as the concave pattern 6 provided in the propylene-based sheet layer 2 in the present invention.

The decorative material of the present invention is a wooden base material that realizes a high-class design feeling such as a sense of shine, a wooden texture, and a sense of depth while taking advantage of the original wooden texture of a wooden base material such as natural wood and veneer. It is important to provide a decorative sheet having a haze value of 45% or more and 90% or less on the surface.
When the haze value is less than 45%, since the transparency is too high, there is a glossiness, but the “plastic feeling” is strong, and it is insufficient for realizing a real wood texture. Moreover, in the case of a haze value larger than 90%, since the conduit pattern of the wooden base material cannot be visually recognized, a real wood texture cannot be realized.

  Next, various materials constituting the decorative sheets 1 and 11 will be described. First, the propylene-based sheet layer 2 will be described. Examples of the propylene-based sheet layer 2 include a homopolypropylene composed of homopolymer of propylene, or a propylene-based sheet composed of a binary or ternary random copolymer or block copolymer copolymerized with ethylene, butene or the like. The propylene-based sheet layer 2 may be any layer as long as it does not damage the bark or terry of the wood-based substrate 8, and a transparent or translucent uncolored sheet is suitable. In addition, the said recessed pattern 6 can manufacture the propylene-type sheet | seat which provided the recessed pattern 6 simultaneously with sheeting by making the chill roll at the time of manufacturing a propylene-type sheet with a T-die extruder into an embossed plate. The thickness of the propylene-based sheet is generally 60 to 120 μm, and may be in an unstretched state or a stretched state in a uniaxial or biaxial direction. If the thickness is less than 60 μm, there is a risk that hot water may be generated due to drying during formation of the primer layer 3 or the surface protective layer 5 or heat during electron beam irradiation, and if it exceeds 120 μm, a significant cost-effective effect is expected. Can not. Further, the propylene-based sheet may be subjected to a known easy adhesion treatment such as corona discharge treatment, plasma treatment, ozone treatment, etc. on a necessary surface as necessary. In addition, the propylene-based sheet may be obtained by appropriately adding a known additive such as an antioxidant, a light stabilizer, and an ultraviolet light inhibitor.

  Next, the patterned low gloss print layer 4 will be described. The patterned low-gloss printing layer 4 is a region (low-gloss region) where the region provided with this layer is less glossy than the other regions. Although this mechanism has not yet been fully elucidated, when the uncured material of the surface-protective layer 5 made of the curable resin provided on the surface and the patterned low-gloss printed layer 4 is applied, It is presumed that the resin component of the patterned low-gloss printing layer 4 and the uncured product of the surface protective layer 5 exhibit some interactions such as elution, dispersion, and mixing depending on the combination of materials and application conditions. Is done. That is, the respective resin components in the uncured product of the curable resin that forms the patterned low-gloss printing layer 4 and the surface protective layer 5 are suspended without being completely compatible in a short time. It is considered that the portion present on or near the patterned low-gloss print layer 4 and in the suspended state scatters light to form a low-gloss region. Since the surface protective layer 5 is formed by crosslinking and curing while maintaining this suspended state, the region on the patterned low-gloss printing layer 4 in the surface protective layer 5 is at least a low-gloss region. By the illusion of, it is assumed that the area is recognized as if it were a recess. Further, depending on the type and application conditions of the ink for forming the patterned low gloss printing layer 4 and the curable resin composition for forming the surface protective layer 5, the outermost surface of the surface protective layer 5 may be In some cases, the glossy printed layer 4 is raised to form a convex shape. Since the surface of the surface protective layer 5 has such a convex shape, light is also scattered at this portion, which is preferable because the visual unevenness is further emphasized. In addition, about the height of the said convex shape, it is preferable that it is the height which is the range which has the effect of this invention, and is usually the range of 2-3 micrometers.

  The ink that forms the patterned low-gloss printing layer 4 has a property of causing interaction with the curable resin composition (uncured curable resin) that forms the surface protective layer 5, and is curable. It is appropriately selected in relation to the resin composition (uncured curable resin). Specifically, the ink vehicle preferably contains 50% by weight or more of a urethane resin or a polyvinyl acetal resin. The urethane-based resin is a polyol component such as an acrylic polyol, a polyester polyol, or a polyether polyol, and an isocyanate component such as an aromatic isocyanate such as tolylene diisocyanate, xylene diisocyanate, or diphenylmethane diisocyanate, isophorone diisocyanate, hexamethylene diisocyanate, Examples include urethane resins obtained by reacting with aliphatic or cycloaliphatic isocyanates such as hydrogenated tolylene diisocyanate (linearly cross-linked or network cross-linked). be able to. Moreover, a polyvinyl acetal type resin is obtained by condensation (acetalization) of polyvinyl alcohol and aldehydes. Examples of the polyvinyl acetal resin include polyvinyl formal (formal resin), polyvinyl acetoacetal, polyvinyl propional, polyvinyl butyral (butyral resin), and polyvinyl hexyl.

  If necessary, unsaturated polyester resin, acrylic resin, vinyl chloride-vinyl acetate copolymer may be used to adjust the degree of expression of the low gloss region and the contrast of the gloss difference between the low gloss region and its surroundings. A gloss adjusting resin such as the above may be used in combination. The mixing ratio of the gloss adjusting resin is in the range of 10 to 90% by weight with respect to the total amount of the vehicle. If it is within this range, a sufficient enhancement effect of low gloss area expression can be obtained. The ink for forming the patterned low gloss printing layer 4 may be uncolored or may be colored by adding a colorant such as a pigment. Moreover, a recessed part becomes clearer and it can be set as the decorative sheet which show | plays the design effect excellent in the uneven | corrugated feeling and depth visually.

  In the present invention, the surface protective layer 5 is provided on the patterned low-gloss printing layer 4, and the curable resin composition (the ink constituting the patterned low-gloss printing layer 4 and the surface protective layer 5 ( The region on the patterned low-gloss printing layer 4 becomes at least a low-gloss region by the interaction with the uncured product of the curable resin, and the region is recognized as if it is a concave portion by the optical illusion. Is. The film thickness of the patterned low gloss printing layer 4 is suitably 0.5 μm or more and 5.0 μm or less in consideration of printability and interaction with the curable resin composition (uncured curable resin). is there.

  Further, it is preferable to incorporate extender pigments as fine particles in the printing ink for forming the patterned low gloss printing layer 4. By blending the extender, light scattering can be promoted and the low gloss effect can be further enhanced. The extender pigment is not particularly limited, and is suitably selected from, for example, silica, talc, clay, barium sulfate, barium carbonate, calcium sulfate, calcium carbonate, magnesium carbonate and the like. Among these, silica, which is a material having a high degree of freedom in material design such as oil absorption, particle size, pore volume, etc., and excellent in designability, whiteness, and coating stability as an ink, is preferable. Silica is preferred.

  The average particle diameter of the silica may be larger than the film thickness (μm) of the patterned low-gloss printing layer 4 and is generally about 1.0 μm or more. The thickness of the protective layer 5 should be determined in relation to the film thickness (μm), but the film thickness of the surface protective layer 5 takes into consideration various physical properties required for a decorative sheet (post-processing suitability and proper use) and cost. It is generally 10.0 μm or less, preferably 7.0 μm or less, and the optimum range of the average particle diameter is 2.0 μm or more and 4.0 μm or less. The amount of the extender pigment added to the ink for forming the patterned low gloss print layer 4 is suitably 5 to 15 parts by weight with respect to 100 parts by weight of the ink composition other than the extender pigment. If the amount is less than 5 parts by weight, sufficient thixotropy cannot be imparted to the printing ink composition forming the patterned low-gloss printing layer 4, and if it exceeds 15 parts by weight, the effect of imparting low gloss is reduced. Therefore, it is not preferable. In the present invention, the patterned low gloss print layer 4 is suitably a conduit pattern print layer.

  Next, the surface protective layer 5 will be described. The surface protective layer 5 is provided for imparting surface physical properties such as scratch resistance, abrasion resistance, stain resistance, water resistance, and weather resistance required for the decorative sheets 1 and 11 (see FIGS. 1 and 2). The resin for forming the surface protective layer 5 is suitably formed using a curable resin such as a thermosetting resin or an ionizing radiation curable resin, but more preferably has a high surface hardness. It is an ionizing radiation curable resin because of its excellent productivity.

  As thermosetting resins, 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, melamine-ureas Examples thereof include a cocondensation resin, a silicon resin, and a polysiloxane resin. If necessary, a curing agent such as a crosslinking agent or a polymerization initiator, or a polymerization accelerator is added to the resin. For example, as a curing agent, isocyanate or organic sulfonate is added to unsaturated polyester resin or polyurethane resin, organic amine is added to epoxy resin, peroxide such as methyl ethyl ketone peroxide, azoisobutyl nitrile, etc. The radical initiator is added to the unsaturated polyester resin. As a method of forming the surface protective layer with the thermosetting resin, for example, the above thermosetting resin is made into a solution, applied by a known coating method such as a roll coating method or a gravure coating method, dried and cured. Can be formed. The coating amount of the surface protective layer is suitably about 1 to 20 g / m @ 2 in terms of solid content. In particular, the film thickness of the patterned low gloss printing layer is 0.5 to 5.0 [mu] m, and the average of fine particles When the particle size is 1.0 μm or more and 7.0 μm or less, 2 to 10 g / m 2 in terms of solid content is appropriate.

  Next, the ionizing radiation curable resin will be described. The ionizing radiation curable resin is a resin that undergoes a cross-linking polymerization reaction upon 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-ray, electron beam, ion beam, etc. is there. Usually, ultraviolet rays or electron beams are used. 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 190 to 380 nm can be used. As the electron beam source, various electron beam accelerators such as a cockcroft Walton type, a bandegraft type, a resonant transformer type, an insulated core transformer type, a linear type, a dynamitron type, and a high frequency type can be used. The electron beam used is 100 to 1000 keV, preferably 100 to 300 keV. The irradiation amount of the electron beam is usually about 2 to 15 Mrad.

  Ionizing radiation curable resins include monomers, prepolymers having a radical polymerizable unsaturated group such as (meth) acryloyl group, (meth) acryloyloxy group, or a cationic polymerizable function such as epoxy group in the molecule. Or it consists of a polymer. These monomers, prepolymers or polymers are used alone or in combination. In this specification, (meth) acrylate is used in the meaning of acrylate or methacrylate. The ionizing radiation means an electromagnetic wave or charged particle beam having an energy quantum capable of polymerizing or cross-linking molecules, and is usually an ultraviolet ray or an electron beam.

  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. The acrylate and methacrylate can be used in common, but 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 cationic polymerizable functional group include epoxy resins such as bisphenol type epoxy resins, novolak 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.

  Examples of monomers having a radically polymerizable unsaturated group include (meth) acrylate compound monofunctional monomers 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, isobornyl (meth) acrylate, ethyl carbitol ( Me ) 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.

  In addition, as a 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, di Propylene 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, tri Propylene 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) acrylate, glycerin polyethylene oxide tri (meth) acrylate, tris (meth) acryloyloxy Examples thereof include ethyl phosphate.

  As the monomer having a cationic polymerizable functional group, a prepolymer monomer having the cationic polymerizable functional group can be used.

  When the above-mentioned ionizing radiation curable resin is cured by irradiating with ultraviolet rays, a photopolymerization initiator is added as a sensitizer. In the case of a resin system having a radically polymerizable unsaturated group, photopolymerization initiators are acetophenones, benzophenones, thioxanthones, benzoin, benzoin methyl ether, Michler benzoylbenzoate, Michler ketone, diphenyl sulfide, dibenzyl disulfide, diethyl Oxite, triphenylbiimidazole, isopropyl-N, N-dimethylaminobenzoate and the like can be used alone or in combination. In the case of a resin system having a cationically polymerizable functional group, an aromatic diazonium salt, an aromatic sulfonium salt, a metallocene compound, a benzoin sulfonate ester, a freeloxyxonium diallyl iodosyl salt, etc., should be used alone or as a mixture. Can do. In addition, generally the addition amount of these photoinitiators is about 0.1-10 weight part with respect to 100 weight part of ionizing radiation curable resins. The application method and application amount of the ionizing radiation curable resin are the same as those of the thermosetting resin, and the description thereof is omitted.

  When the surface protective layer 5 is given further scratch resistance and wear resistance, for example, inorganic particles such as α-alumina, silica, kaolinite, iron oxide, diamond, silicon carbide, etc. Is mentioned. Examples of the particle shape include a spherical shape, an elliptical shape, a polyhedral shape, a scale shape, and the like. Although there is no particular limitation, a spherical shape is preferable. Examples of organic substances include synthetic resin beads such as cross-linked acrylic resin and polycarbonate resin. The particle size is usually about 3 to 200% of the film thickness. Among these, spherical α-alumina is particularly preferable because it has high hardness and a large effect on improving wear resistance, and it is relatively easy to obtain spherical particles. Moreover, the mixture ratio of the fine particles with respect to the curable resin forming the surface protective layer 5 is 1 to 80 parts by weight with respect to 100 parts by weight of the curable resin.

  Next, the primer layer 3 will be described. The primer layer 3 is provided for the purpose of improving the adhesive strength between the propylene-based sheet layer 2 and the patterned low gloss printing layer 4 or the surface protective layer 5. Examples of the resin used for the primer layer 3 include ester resins, urethane resins, acrylic resins, polycarbonate resins, vinyl chloride-vinyl acetate copolymers, polyvinyl butyral resins, nitrocellulose resins, and the like. It can be mixed to form a coating composition or an ink composition, and can be formed using an appropriate application means such as a roll coating method or a gravure printing method.

  However, the primer layer 3 is particularly preferably formed of a resin comprising (i) a copolymer of an acrylic resin and a urethane resin and (ii) an isocyanate. That is, the copolymer of (i) an acrylic resin and a urethane resin comprises an acrylic polymer component having a hydroxyl group at the terminal (component A), a polyester polyol component having a hydroxyl group at both ends (component B), and a diisocyanate component (component). C) is mixed and reacted to form a prepolymer, and a chain extender (component D) such as diamine is further added to the prepolymer to extend the chain. By this reaction, 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 the terminal. This acrylic-polyester urethane copolymer is formed by reacting the terminal hydroxyl group with the isocyanate of (ii) and curing it.

  When the above three components A, B and C are reacted at 60 to 120 ° C. for about 2 to 10 hours, the isocyanate group of the diisocyanate reacts with the hydroxyl group at the end of the polyester polyol to form a polyester urethane resin component and an acrylic polymer. A compound in which a diisocyanate is added to a terminal hydroxyl group is also mixed, and a prepolymer is formed in a state where excess isocyanate groups and hydroxyl groups remain. As a chain extender, for example, a diamine such as isophorone diamine or hexamethylene diamine is added to this prepolymer, the isocyanate group is reacted with the chain extender, and the chain is extended so that the acrylic polymer component is contained in the polyester urethane molecule. The (i) acrylic-polyester urethane copolymer introduced and having a hydroxyl group at the terminal can be obtained.

  Addition of isocyanate of (ii) to acrylic-polyester urethane copolymer of (i), coating method, coating solution adjusted to necessary viscosity in consideration of coating amount after drying, gravure coating method, roll The primer layer 3 may be formed by coating by a known coating method such as a coating method. The isocyanate of (ii) may be any isocyanate that can be crosslinked and cured by reacting with the hydroxyl group of the acrylic-polyester urethane copolymer of (i). An aliphatic isocyanate can be used, and an aliphatic isocyanate is particularly desirable from the viewpoint of thermal discoloration prevention and weather resistance. Specifically, a monomer such as tolylene diisocyanate, xylylene diisocyanate, 4,4′-dicyclohexylmethane diisocyanate, hexamethylene diisocyanate, lysine diisocyanate, or a multimer such as a dimer or trimer thereof, or And polyisocyanates such as derivatives (adducts) obtained by adding these isocyanates to polyols. In addition, although the thing of the structure which provided the primer layer 3 was shown in the decorative sheets 1 and 11 of FIG. 1, FIG. 2, this is a decorative sheet specification which responds to a high level request | requirement, and a request level is low These primer layers 3 are not necessarily provided.

  The application amount of the primer layer 3 after drying is 1 to 20 g / m <2>, preferably 1 to 5 g / m <2>. Moreover, this primer layer 3 is good also as a layer which added additives, such as fillers, such as a silica powder, a light stabilizer, and a coloring agent, as needed.

Although not shown, a primer layer is provided on the back surface of the propylene-based sheet layer 2 shown in FIGS. 1 and 2 (the surface opposite to the surface on which the surface protective layer 5 is provided), and the propylene-based sheet layer 2 The woody base material 8 may be configured to be laminated through the adhesive layer 7 so as to improve the adhesive force when used as a decorative material. The primer layer provided on the back surface of the propylene-based sheet layer 2 may be appropriately provided as necessary when the adhesive force is insufficient. For example, the primer layer described above may also be used. The resin described in the layer 3 may be appropriately selected and used.
It is preferable to add a known additive such as a line absorber.

  In addition, the decorative sheets 1 and 11 and the wooden base material 8 for use as a decorative material may be attached via an adhesive layer 7 or a pressure-sensitive adhesive layer having a separator is provided in advance. A separator sheet may be peeled off using a decorative sheet that has been used, and then adhered via an adhesive layer.

  The adhesive used for the adhesive layer 7 may be any type of adhesive such as thermoplastic resin, thermosetting resin, and rubber (elastomer). These may be known ones or commercially available products. Thermoplastic resin adhesives include polyvinyl acetate resin, polyvinyl alcohol, polyvinyl acetal (polyvinyl formal, polyvinyl butyral, etc.), cyanoacrylate, polyvinyl alkyl ether, polyvinyl chloride, polyamide, polymethyl methacrylate, nitrocellulose, acetic acid Cellulose, thermoplastic epoxy, polystyrene, ethylene-vinyl acetate copolymer, ethylene-ethyl acrylate copolymer, and the like can be mentioned. Examples of thermosetting resin adhesives include urea resins, melamine resins, phenol resins, Resorcinol resin, furan resin, epoxy resin, unsaturated polyester resin, polyurethane resin, polyimide resin, polyamideimide, polybenzimidazole, polybenzothiazole, and the like can be given. Rubber-based adhesives include natural rubber, recycled rubber, styrene-butadiene rubber, acrylonitrile-butadiene rubber, chloroprene rubber, butyl rubber, polysulfide rubber, silicone rubber, polyurethane rubber, stereo rubber (synthetic natural rubber), ethylene propylene rubber, Examples include block copolymer rubber (SBS, SIS, SEBS, etc.). The coating method is formed by a known coating method such as gravure coating or roll coating, and the coating amount is about 10 to 30 g / m @ 2 (dry state).

  Moreover, as a kind of adhesive used for the said adhesive layer, it is possible to use adhesives, such as a rubber adhesive, an acrylic adhesive, a silicone adhesive, for example. The coating method is formed by a known coating method such as gravure coating or roll coating, and the coating amount is about 10 to 30 g / m @ 2 (dry state).

  As the separator, a release paper obtained by laminating a silicone release layer on a high-quality paper having a basis weight of 30 to 150 g / m 2 or a polymer film having poor adhesiveness with an adhesive layer is used.

  Further, the wood base material 8 may be anything as long as it has a wood texture due to grain or the like. For example, a solid wood or a veneer, a medium density fiber board (MDF), a high density fiber board (HDF) ), And woody base materials such as particle board and plywood. As the thickness of the base material for decorative plate, a thickness of 1.0 mm or more is suitable for practical use.

Although not shown, a moisture-proof layer for preventing moisture permeation may be provided on the back surface of the wooden base material. As the moisture-proof layer, a film formed by depositing a transparent oxide film and / or a transparent inorganic thin film on a transparent thermoplastic resin is applicable.
As the transparent thermoplastic resin, polyolefin resin (polyethylene, polypropylene), polyester resin, polyvinyl chloride resin, cellophane, etc. can be applied. As the transparent oxide film and / or transparent inorganic thin film, silicon oxide, oxide An inorganic thin film layer such as aluminum, magnesium oxide, or zirconium oxide can be formed by a vacuum deposition method, a sputtering method, or the like. Accordingly, it is possible to prevent moisture from entering from the back surface, thereby preventing occurrence of cracks, discoloration, peeling, and the like.

  Next, the present invention will be described in more detail with reference to the following examples. The scope of the present invention is not limited to the examples.

  A 100 μm thick transparent polypropylene film [manufactured by Riken Technos Co., Ltd .: OW-ES-2 Clear (trade name)], which has a concave pattern made of a wood grain conduit groove on one side and is subjected to corona discharge treatment on both sides. A transparent primer layer having a thickness of 2 μm made of a two-component curable urethane resin containing an acrylic / urethane block copolymer as a main agent and isocyanate as a curing agent is formed on the entire surface provided with the conduit groove, and urethane on the other surface. / Nitrated cotton-based primer layer is formed by gravure printing method, and then 16 parts by weight of silica coated with silicone oil is blended over 100 parts by weight of urethane acrylate ionizing radiation curable resin on the entire surface of the transparent primer layer. Along with benzotriazole UV absorber and hindered amine radical scavenger) Electron beam as well as fabric (accelerating voltage: 125 keV, dose: 5 Mrad) to prepare a form to the decorative sheet transparency surface protective layer by irradiating 5μm thick a.

  Next, after applying and drying 8 g / sq. 2 of vinyl acetate adhesive on a 10 mm-thick solid oak material on the decorative sheet, a roll laminator is placed so that the transparent polypropylene film of the decorative sheet is positioned on the coated surface. A decorative material of the present invention adhered by a machine was prepared.

  A 100 μm thick transparent polypropylene film [manufactured by Riken Technos Co., Ltd .: OW-ES-2 Clear (trade name)], which has a concave pattern made of a wood grain conduit groove on one side and is subjected to corona discharge treatment on both sides. A transparent primer layer having a thickness of 2 μm made of a two-component curable urethane resin containing an acrylic / urethane block copolymer as a main agent and isocyanate as a curing agent is formed on the entire surface provided with the conduit groove, and urethane on the other surface. / Nitrated cotton-based primer layer is formed by gravure printing, and then the entire surface of the transparent primer layer is coated with ionizing radiation curable resin composition (100 parts by weight of urethane acrylate ionizing radiation curable resin with silicone oil) 16 parts by weight of silica, benzotriazole UV absorber and hindered amine radical Electron beam with coating a composition) which was added Le scavenger (accelerating voltage: 125 keV, dose: 5 Mrad) to prepare a form to the decorative sheet transparency surface protective layer by irradiating 5μm thick a.

  A pressure-sensitive adhesive layer made of an acrylate copolymer was applied to the surface of the decorative sheet obtained on the side opposite to the side where the transparent surface protective layer of the transparent polypropylene film was provided so as to have a thickness of 50 μm.

  Furthermore, in order to protect the formed adhesive layer, a release paper having a film thickness of 125 μm was laminated.

  The release sheet of the decorative sheet was peeled off, and the decorative material of the present invention was prepared by sticking to a solid oak material having a thickness of 10 mm with a roll laminator so that the pressure-sensitive adhesive layer was positioned.

  A decorative material was produced in the same manner as in Example 2 except that the grain conduit groove pattern of Example 2 was changed to a grain pattern.

  A 100 μm thick transparent polypropylene film [manufactured by Riken Technos Co., Ltd .: OW-ES-2 Clear (trade name)], which has a concave pattern made of a wood grain conduit groove on one side and is subjected to corona discharge treatment on both sides. A transparent primer layer having a thickness of 2 μm made of a two-component curable urethane resin containing an acrylic / urethane block copolymer as a main agent and isocyanate as a curing agent is formed on the entire surface provided with the conduit groove, and urethane on the other surface. / Nitrated cotton-based primer layers are formed by gravure printing, and then a polyester-based urethane resin having a number average molecular weight of 10,000 and a glass transition temperature (Tg) of −40.0 ° C. is formed on the surface of the transparent primer layer. Uses a printing ink composition in which 5 parts by weight of silica particles having an average particle size of 4 μm are blended with 100 parts by weight of a transparent printing ink as a vehicle Then, after forming a conduit pattern layer (patterned low gloss printing layer in the present invention) by gravure printing, an ionizing radiation curable resin composition (urethane acrylate type) is formed on the entire surface on which the conduit pattern layer is formed. Applying 16 parts by weight of silica coated with silicone oil to 100 parts by weight of ionizing radiation curable resin and adding a benzotriazole UV absorber and a hindered amine radical scavenger) and applying an electron beam (acceleration) Voltage: 125 KeV, irradiation amount: 5 Mrad) was applied to form a transparent surface protective layer having a thickness of 5 μm to prepare a decorative sheet.

  Next, the decorative sheet is coated with 8 g / scale 2 of vinyl acetate adhesive in a wet state on a 10 mm thick solid oak and dried, and then a roll laminator is placed so that the backing sheet of the decorative sheet is positioned on the coated surface. A decorative material of the present invention adhered by a machine was prepared.

  About the decorative material of Examples 1-4 produced above, stain resistance and abrasion resistance are evaluated by the evaluation method described below, and the haze value of the decorative sheet of Examples 1-4 is measured. It was summarized in

〔Evaluation methods〕
・ Contamination resistance:
In accordance with the JAS plywood contamination A test, specifically, the decorative material was cut into a 10 cm square to make a test piece, which was placed horizontally and then placed on the surface protective layer surface of the test piece. A black ink (as defined in JIS S 6037 marking pen) and a red crayon (as defined in JIS S 6026) were each drawn into a straight line 10 mm wide and 10 cm long and allowed to stand for 4 hours and then impregnated with ethanol When the straight line having a length of 10 cm was wiped off, it was shown as “good” by ◯ and when it was not wiped, it was shown as “bad” by evaluation.
・ Abrasion resistance:
Steel wool (# 0000) was attached to a weight adjusted to a load of 29.4 kPa (300 g / cm 2), the surface of the cosmetic material was rubbed 20 times, and the surface change was visually evaluated according to the following evaluation criteria.
(Evaluation Criteria)-A case where no surface change was observed at all was indicated as good by a circle, and a case where a surface change was clearly recognized was indicated by a failure as indicated by a cross.
・ Measure haze value:
The surface of the decorative sheet was measured by Toyo Seiki Seisakusho.

  As is clear from Table 1, the decorative material of the present invention can express the natural wood texture peculiar to natural wood by utilizing the bark and terry of the woody base material as it is. By adopting a structure in which the groove and the conduit pattern layer are arranged via a transparent polypropylene film, a design effect with a sense of depth (depth) can be expressed visually, and a conduit pattern layer is also provided. By adopting the structure, this region (conduit pattern layer region) can be recognized as a concave portion as a low gloss region, and the other region (region other than the conduit pattern layer) can be recognized as a high gloss region as a convex portion. It is possible to express a design effect with a sense of unevenness, and to produce a new design effect.

It is a layer lineblock diagram showing the 1st embodiment of the cosmetics concerning the present invention diagrammatically. It is a layer block diagram which shows schematically 2nd Embodiment of the cosmetics concerning this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,11 Decorative sheet 2 Propylene-based sheet layer 3 Primer layer 4 Pattern-like low gloss printing layer 5 Surface protective layer 6 Recessed pattern 7 Adhesive layer 8 Woody base material

Claims (4)

In the decorative material formed by sticking a decorative sheet made of a propylene-based sheet layer provided with a surface protective layer on the entire surface on which the concave pattern is formed on the surface of the wooden substrate,
A decorative material, wherein the decorative sheet has a haze value of 45% or more and 90% or less. The decorative material according to claim 1, wherein a patterned low gloss printing layer is provided between the propylene-based sheet layer and the surface protective layer. The decorative material according to claim 1, wherein the surface protective layer is made of a curable resin. 4. The decorative material according to claim 3, wherein the curable resin is an ionizing radiation curable resin.

Images