JP2016203432A - Decorative sheet and decorative laminate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a decorative sheet that suppresses whitening of a salient, and exhibits excellent tactile feeling even after processing into a decorative laminate, and a decorative laminate obtained by pasting the decorative sheet to an adherend.SOLUTION: A decorative sheet 1 at least includes a salient 5 including a resin equal to or higher than 10 μm high on a substrate sheet 1. In the decorative sheet 1, the salient 5 includes 15-75 mass% organic particles with an average particle diameter of 12-45 μm.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a decorative sheet and a decorative board.

  Conventionally, decorative sheets have been laminated on the surfaces of various articles in order to impart design properties. For example, decorative sheets are laminated and used on the surfaces of wall covering materials used for the wall surfaces of buildings, floor decorative materials used for floor surfaces, furniture, and the like.

  The decorative sheet laminated on the surface of the article as described above is required to exhibit a three-dimensional design and an excellent touch feeling. As a decorative sheet showing such a three-dimensional design and touch, a pattern printing layer, a transparent resin layer, and a convex portion by emboss printing are provided on the substrate, and the convex portion is synchronized with the pattern printing layer. A decorative material has been proposed (see, for example, Patent Documents 1 and 2).

  When forming convex portions by thick printing, inorganic particles represented by silica, calcium carbonate, aluminum hydroxide, etc. are added to the ink that forms the convex portions, and thixotropic properties are imparted to the ink. In general, the transferability is improved, the deformation of the ink after transfer is suppressed, and a convex portion having a delicate shape is formed with good reproducibility. However, in the case of the conventional decorative sheet, there is a problem that the convex portion is whitened due to the influence of the inorganic particles added to impart thixotropic properties, the transparency is lost, and the design feeling is impaired. In particular, in the case of a decorative material having a configuration in which the convex portions are in synchronization with the pattern pattern layer, there is a problem in that the design located under the white pattern appears cloudy due to the whitened convex portions, and the design inherent in the pattern pattern layer is greatly impaired.

  When decorative sheets are used for decorations such as furniture and floors, a decorative sheet is laminated on various adherends such as wooden materials via an adhesive, and then pasted by pressure and processed into a decorative board. It is generally done. However, as a result of the pressure applied to the decorative sheet having a convex portion during processing into the decorative plate, the convex portion is deformed, and the tactile sensation that the decorative sheet has in the state of the decorative sheet is reduced in the state of the decorative plate. there were.

JP-A-10-86313 JP2013-123863A

  The present invention provides a decorative sheet that suppresses whitening of convex portions and exhibits excellent tactile sensation even after being processed into a decorative plate, and a decorative plate formed by sticking the decorative sheet to an adherend. With the goal.

  As a result of intensive research, the inventor has a predetermined amount of organic particles having a predetermined average particle diameter in a decorative sheet in which at least convex portions including a resin are formed on a base sheet. The present inventors have found that the above object can be achieved by adopting a configuration, and have completed the present invention.

That is, the present invention relates to the following decorative sheet and decorative plate.
1. A decorative sheet in which at least convex portions including a resin are formed on a base sheet, wherein the convex portions contain 15 to 75% by mass of organic particles having an average particle diameter of 12 to 45 μm. Makeup sheet.
2. Item 2. The decorative sheet according to Item 1, wherein the height of the convex portion containing the resin is 10 µm or more.
3. Item 3. The decorative sheet according to Item 1 or 2, wherein the organic particles are resin beads.
4). Item 4. The decorative sheet according to Item 3, wherein the resin beads are at least one selected from the group consisting of acrylic beads, urethane beads, nylon beads, and styrene beads.
5. Item 5. The decorative sheet according to any one of Items 1 to 4, further comprising a pattern layer.
6). Furthermore, it has a transparent resin layer, the said pattern pattern layer and the said transparent resin layer are laminated | stacked in this order on the base material sheet, and the convex part containing the said resin is formed on the said transparent resin layer. Item 6. The decorative sheet according to Item 5.
7). Item 7. The decorative sheet according to Item 5 or 6, wherein the design pattern layer and the convex portion including the resin are synchronized.
8). Item 10. A decorative board obtained by attaching the decorative sheet according to any one of Items 1 to 7 to an adherend.

  The decorative sheet of the present invention is formed with at least a convex portion containing a resin, and the convex portion contains a predetermined amount of organic particles having a predetermined average particle diameter, thereby suppressing whitening of the convex portion, In addition, excellent tactile sensation can be exhibited even after processing into a decorative board.

It is a cross-sectional schematic diagram which shows an example of the laminated constitution of the decorative sheet of this invention. It is a cross-sectional schematic diagram which shows an example of the laminated constitution of the decorative sheet of this invention.

  Hereinafter, the decorative sheet and the decorative plate of the present invention will be described in detail.

1. The decorative sheet of the present invention has at least a convex part containing a resin on a base sheet, and the convex part contains 15 to 75% by mass of organic particles having an average particle diameter of 12 to 45 μm. It is characterized by that.

  In the decorative sheet of the present invention having the above-described features, since the convex portion contains organic particles having a specific average particle diameter in a specific range of content, whitening of the convex portion is suppressed, and Excellent tactile sensation can be maintained after processing.

  Hereinafter, each layer which comprises a decorative sheet is demonstrated. In the present specification, the direction in which the convex portion is formed as viewed from the base sheet is referred to as “upper” or “front surface”, and the direction in which the convex portion is formed as viewed from the base sheet. Refers to the opposite side as “bottom” or “back”.

The base sheet is not limited, and a fibrous sheet, a plastic base, a metal base, a wood base, and the like can be used.

  As the fibrous sheet, known fibrous sheets such as thin paper, inter-paper reinforcing paper, impregnated paper, titanium paper, coated paper, corrugated paper, linter paper, craft paper, and high-quality paper can be used. Specifically, wallpaper general paper (pulp-based sheet sized with a known sizing agent); flame-retardant paper (pulp-based sheet treated with a flame retardant such as guanidine sulfamate or guanidine phosphate) ); Inorganic paper containing inorganic additives such as aluminum hydroxide and magnesium hydroxide; fine paper; thin paper; fiber mixed paper (paper made by mixing pulp and synthetic fiber). In addition, what corresponds to a nonwoven fabric is included in the fibrous sheet used for this invention on classification.

  As the plastic substrate, various plastic sheets and films such as polyethylene, polypropylene, polyethylene terephthalate, polybutylene terephthalate, acrylonitrile butadiene styrene, and polyvinyl chloride can be used. The plastic substrate is preferably colored. As a metal base material, what made the undercoat of a coloring agent on a steel plate, aluminum, stainless steel etc. can be commercialized as a base material. Examples of the wood-based substrate include plywood, particle board, medium density fiber board, and the like.

Although the basis weight of the base sheet is not critical, preferably about 20 to 300 g / m ^2, more preferably about 50 to 300 g / m ^2, about 50~130g / m ² is more preferable.

Convex part As for the decorative sheet of this invention, the convex part containing resin is formed at least on the base material sheet. It is preferable that the convex part in this invention is formed by raising printing as a so-called raising printing layer so that a desired design may be expressed. In addition, in this invention, a convex part is a form shown by convex shape in a cross-sectional schematic diagram as shown in FIG.1 and 2, for example, the cone-shaped or cylindrical protrusion is formed in the decorative sheet surface. It includes not only a form but also a form in which protrusions are formed to extend linearly, such as a conduit pattern.

  The height of the convex portion of the decorative sheet of the present invention is preferably 10 μm or more, more preferably 15 μm or more, from the viewpoint of expressing excellent tactile sensation even after processing into a decorative board. Moreover, the upper limit with the preferable height of a convex part is 50 micrometers, and a more preferable upper limit is 40 micrometers. By making the upper limit of the height of a convex part into the said range, the decorative sheet of this invention can show the outstanding tactile sense, and can show the more outstanding abrasion resistance. In addition, in this specification, the height of a convex part is the value computed by observing the cross section of a decorative sheet with a scanning electron microscope (SEM), and calculating the average value of 5 points | pieces.

  The resin constituting the convex portion is preferably a curable resin such as a thermosetting resin or an ionizing radiation curable resin (for example, an electron beam curable resin) from the viewpoint of suppressing the deformation of the convex portion and obtaining a desired shape. . 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 polyurethanes), 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.

  The method of forming the convex portion with the thermosetting resin includes, for example, applying a solution of the thermosetting resin by a coating method such as a roll coating method, a gravure coating method, a gravure printing method, a silk screen printing method, and drying and curing. A method is mentioned.

  The ionizing radiation curable resin is not limited as long as it is a resin that undergoes a crosslinking polymerization reaction upon irradiation with ionizing radiation and changes to a three-dimensional polymer structure. For example, one or more prepolymers, oligomers and monomers having a polymerizable unsaturated bond or epoxy group that can be crosslinked by irradiation with ionizing radiation in the molecule can be used. Examples thereof include acrylate resins such as urethane acrylate, polyester acrylate, and epoxy acrylate; silicon resins such as siloxane; polyester resins; epoxy resins and the like.

  Examples of the ionizing radiation include visible light, ultraviolet light (near ultraviolet light, vacuum ultraviolet light, etc.), X-rays, electron beams, ion beams, etc. Among them, ultraviolet light and / or electron beams are desirable.

  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. The wavelength of ultraviolet light is about 190 to 380 nm.

  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. The energy of the electron beam is preferably about 100 to 1000 keV, more preferably about 100 to 300 keV. The irradiation amount of the electron beam is preferably about 1 to 15 Mrad, more preferably about 1 to 10 Mrad, and further preferably about 3 to 5 Mrad.

  The ionizing radiation curable resin is sufficiently cured when irradiated with an electron beam, but it is preferable to add a photopolymerization initiator (sensitizer) when it is cured by irradiation with ultraviolet rays.

  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 mass parts with respect to 100 mass parts of ionizing radiation curable resins.

  As a method for forming a convex portion with an ionizing radiation curable resin, for example, a solution of an ionizing radiation curable resin is applied by a coating method such as a gravure coating method, a roll coating method, a gravure printing method, a silk screen printing method, or the like. After drying by ionizing radiation.

  A convex part contains 15-75 mass% of organic particles whose average particle diameter is 12-45 micrometers in solid content which forms a convex part. When the content of the organic particles is less than 15% by mass, the tactile sensation becomes insufficient, and the thixotropic property of the resin composition forming the convex portion becomes insufficient, so that it is difficult to form the convex portion by thick printing. . Moreover, when content of the said organic particle exceeds 75 mass%, a convex part will be whitened and a design feeling will be impaired. The content of the organic particles is preferably 30 to 60% by mass.

  Although it does not specifically limit as an organic particle, Usually, a resin bead is used. Examples of the resin beads include acrylic beads, urethane beads, nylon beads, and styrene beads. Among these, it is preferable to use acrylic beads or urethane beads, and it is particularly preferable to use acrylic beads from the viewpoint of enhancing the scratch resistance of the convex portions in addition to suppressing the whitening of the convex portions and imparting excellent tactile sensation. Moreover, it is preferable to use a cross-linked resin bead from the viewpoint of imparting excellent tactile sensation and enhancing the scratch resistance of the convex portion. Specific examples of the crosslinked resin beads include crosslinked acrylic beads and crosslinked urethane beads.

  The organic particles contained in the protrusions have an average particle diameter of 12 to 45 μm. The average particle diameter of the organic particles is preferably 15 to 30 μm. If the average particle size of the organic particles is less than 12 μm, excellent tactile sensation cannot be obtained. On the other hand, when the average particle diameter of the organic particles exceeds 45 μm, the production stability is lowered, and it becomes difficult to form convex portions having a desired shape with good reproducibility. Moreover, when forming a convex part by heightening printing, it is preferable that the average particle diameter of the said organic particle shall be 1/2 or less of plate depth from a viewpoint of the transfer stability of an ink. In the present specification, the average particle diameter is a value measured by a laser diffraction / scattering method.

  The convex portion may contain fine particles other than organic particles having an average particle diameter of 12 to 45 μm within a range not impairing the effects of the present invention. Examples of the fine particles other than the organic particles having an average particle size of 12 to 45 μm include inorganic particles and organic particles having an average particle size other than the above range. The content of fine particles other than organic particles having an average particle size of 12 to 45 μm is preferably 5% by mass or less in the solid content forming the convex portion. Further, it is particularly preferable that the convex portion does not substantially contain fine particles other than organic particles having an average particle diameter of 12 to 45 μm.

(Layer structure of decorative sheet)
As long as the convex part containing resin is formed at least on the base material sheet, the specific structure (layer structure) of the decorative sheet of the present invention is not limited. For example, a decorative sheet in which at least a pattern layer and a transparent resin layer are laminated on a base sheet, and a convex portion containing a resin is formed on the transparent resin layer can be mentioned. FIG. 1 shows the above example of the layer structure of the decorative sheet of the present invention. In FIG. 1, the decorative sheet 1 of the present invention has a pattern layer 3 and a transparent resin layer 4 laminated in this order on a base sheet 2, and a convex portion 5 containing a resin on the transparent resin layer 4. Is formed. In the decorative sheet of the present invention, a colored concealing layer 6 may be further formed between the base sheet 2 and the pattern layer 3 as shown in FIG.

  Hereinafter, each layer will be specifically described by using a sheet having such a layer structure as a representative example.

Pattern Pattern Layer The decorative sheet of the present invention may form a pattern pattern layer as necessary. The pattern layer is usually provided on the front side of the base sheet, but may be provided on the back side of the base sheet when a transparent base sheet is used. In addition, in the decorative sheet of this invention, it becomes a decorative sheet excellent in the designability by setting it as the structure which the pattern pattern layer and the said convex part synchronize. Specifically, as shown in FIG. 1 and FIG. 2, a configuration in which convex portions are synchronized with a portion where the pattern of the pattern layer is formed, or conversely, a pattern of the pattern layer is formed. The convex part may synchronize with the part which is not.

  The design pattern layer imparts design properties to the decorative sheet. Examples of the design pattern include a grain pattern, a stone pattern, a grain pattern, a tiled pattern, a brickwork pattern, a cloth pattern, a leather pattern, a geometric figure, a character, a symbol, an abstract pattern, a flower pattern, etc. You can choose according to your purpose.

  The pattern pattern layer can be formed, for example, by printing a pattern pattern. Examples of printing methods include gravure printing, flexographic printing, silk screen printing, offset printing, and the like. As the printing ink, a printing ink containing a colorant, a binder resin, and a solvent can be used. These inks may be known or commercially available.

  It does not specifically limit as a coloring agent, A well-known inorganic pigment or organic pigment can be used. Inorganic pigments include, for example, titanium oxide, zinc white, carbon black, black iron oxide, yellow iron oxide, yellow lead, molybdate orange, cadmium yellow, nickel titanium yellow, chrome titanium yellow, iron oxide (valve), and cadmium. Examples thereof include red, ultramarine blue, bitumen, cobalt blue, chromium oxide, cobalt green, aluminum powder, bronze powder, titanium mica, and zinc sulfide. Examples of the organic pigment include aniline black, perylene black, azo (azo lake, insoluble azo, condensed azo), polycyclic (isoindolinone, isoindoline, quinophthalone, perinone, flavantron, anthrapyrimidine, anthraquinone, Quinacridone, perylene, diketopyrrolopyrrole, dibromoanthanthrone, dioxazine, thioindigo, phthalocyanine, indanthrone, halogenated phthalocyanine). About 10-100 mass parts is preferable with respect to 100 mass parts of resin components, and, as for content of a pigment, about 15-50 mass parts is more preferable.

  The binder resin can be set according to the type of the base sheet. For example, acrylic resin, styrene resin, polyester resin, urethane resin, chlorinated polyolefin resin, vinyl chloride-vinyl acetate copolymer resin, polyvinyl butyral resin, alkyd resin, petroleum resin, ketone resin, epoxy Resin, melamine resin, fluorine resin, silicone resin, fiber derivative, rubber resin and the like.

  Examples of the solvent (or dispersion medium) include petroleum organic solvents such as hexane, heptane, octane, toluene, xylene, ethylbenzene, cyclohexane, and methylcyclohexane; ethyl acetate, butyl acetate, 2-methoxyethyl acetate, and acetic acid-2 -Ester-based organic solvents such as ethoxyethyl; alcohol-based organic solvents such as methyl alcohol, ethyl alcohol, normal propyl alcohol, isopropyl alcohol, isobutyl alcohol, ethylene glycol, propylene glycol; ketones such as acetone, methyl ethyl ketone, methyl isobutyl ketone, and cyclohexanone Organic solvents; ether organic solvents such as diethyl ether, dioxane, tetrahydrofuran; dichloromethane, carbon tetrachloride, trichloroethylene, tetrachloroethylene Chlorinated organic solvents; and water. These solvents (or dispersion media) can be used alone or in the form of a mixture.

  The thickness of the design pattern layer is different from the type of design pattern, but is generally preferably about 0.1 to 20 μm.

Transparent resin layer In the decorative sheet of the present invention, a transparent resin layer may be formed on the pattern layer for the purpose of adjusting gloss. The transparent resin layer is not particularly limited as long as it is transparent, and includes any of colorless and transparent, colored and transparent, and translucent. Examples of the resin constituting the transparent resin layer include phenol resin, urea resin, diallyl phthalate, melamine resin, guanamine resin, unsaturated polyester resin, polyurethane resin, epoxy resin, aminoalkyd resin, and melamine-urea cocondensate. , Silicon resin, polysiloxane, polyethylene terephthalate, polybutylene terephthalate, polyamide, polyethylene, polypropylene, ethylene / vinyl acetate copolymer, ethylene / acrylic acid copolymer, ethylene / acrylic acid ester copolymer, ionomer, polymethylpentene , Acrylic acid ester, methacrylic acid ester, polycarbonate, cellulose triacetate and the like. Moreover, you may use the above-mentioned ionizing radiation curable resin. These resins can be used alone or in combination of two or more.

  To adjust the gloss, the transparent resin layer may contain fine particles such as silica, alumina and kaolin, and beads such as urethane beads and acrylic beads.

  The transparent resin layer may be colored as long as it has transparency, but it is particularly desirable not to add a colorant.

  The thickness of the transparent resin layer is usually about 5 to 50 μm, but may exceed the above range depending on the use of the decorative sheet.

A colored concealment layer may be formed on the colored concealment layer base sheet as necessary. The colored concealing layer is formed as a whole surface solid printing layer on the base material sheet. The colored hiding layer can be, for example, a layer containing a pigment and a binder resin. This colored hiding layer can be formed by a known printing method such as gravure printing, flexographic printing, silk screen printing, or offset printing using, for example, a printing ink containing a coloring material, a binder resin, and a solvent. These inks may be known or commercially available.

  As the colorant, the binder resin, and the solvent, those used in the above-described pattern layer can be used. The thickness of the colored concealing layer is preferably about 1 to 10 μm.

A primer layer may be formed as necessary on the primer layer substrate sheet, the color concealing property, the pattern layer or the transparent resin layer for the purpose of improving the adhesion to the convex portion, etc. .

  As the resin contained in the primer layer, for example, acrylic, vinyl chloride-vinyl acetate copolymer, polyester, polyurethane, chlorinated polypropylene, chlorinated polyethylene, and the like can be used. Particularly, acrylic, chlorinated polypropylene, etc. Is desirable.

  Examples of the acrylic include, for example, poly (meth) methyl acrylate, poly (meth) ethyl acrylate, poly (meth) acrylate propyl, poly (meth) acrylate butyl, and (meth) acrylate methyl- (meth) acrylic acid. (Meth) such as butyl copolymer, (meth) ethyl acrylate- (meth) butyl acrylate copolymer, ethylene- (meth) methyl acrylate copolymer, styrene- (meth) methyl acrylate copolymer An acrylic resin made of a homopolymer or a copolymer containing an acrylate ester may be mentioned.

  Polyurethane is a composition having a polyol (polyhydric alcohol) as a main component and an isocyanate as a crosslinking agent (curing agent).

  As the polyol, one having two or more hydroxyl groups in the molecule, for example, polyethylene glycol, polypropylene glycol, acrylic polyol, polyester polyol, polyether polyol and the like are used.

  As the isocyanate, a polyvalent isocyanate having two or more isocyanate groups in the molecule is used. For example, aromatic isocyanate such as 2-4 tolylene diisocyanate, xylene diisocyanate, 4-4 diphenylmethane diisocyanate, or aliphatic (or alicyclic) such as hexamethylene diisocyanate, isophorone diisocyanate, hydrogenated tolylene diisocyanate, hydrogenated diphenylmethane diisocyanate ) Isocyanates are used.

  Although the thickness of a primer layer is not limited, about 0.1-10 micrometers is preferable and about 0.1-5 micrometers is more preferable.

You may provide a back surface primer layer in the back surface (surface on the opposite side to the surface in which a convex part is formed) of a back surface primer layer base material sheet as needed. The back primer layer is effective when a decorative sheet is produced by laminating the decorative sheet of the present invention and the adherend.

  A back surface primer layer can be formed by apply | coating a well-known primer agent to a base material sheet. Examples of the primer agent include a urethane resin-based primer agent made of an acrylic-modified urethane resin (acrylic urethane-based resin), a urethane-cellulose resin (for example, a resin obtained by adding hexamethylene diisocyanate to a mixture of urethane and nitrified cotton) ), A resinous primer agent made of a block copolymer of acrylic and urethane, and the like. You may mix | blend an additive with a primer agent as needed. Examples of the additive include fillers such as calcium carbonate and clay, flame retardants such as magnesium hydroxide, antioxidants, lubricants, foaming agents, ultraviolet absorbers, and light stabilizers. The blending amount of the additive can be appropriately set according to the product characteristics.

The application amount of the primer agent is not particularly limited, but is usually about 0.1 to 100 g / m ² , preferably about 0.1 to 50 g / m ² . The thickness of the back primer layer is not particularly limited, but is usually about 0.01 to 10 μm, preferably about 0.1 to 1 μm.

2. Decorative plate By adhering the decorative sheet to an adherend, a decorative plate can be obtained. The adherend is not limited, and the same materials as those used for known decorative panels can be used. Examples of the adherend include wood materials, metals, ceramics, plastics, and glass. In particular, the decorative sheet can be suitably used for a wood material. Specific examples of wood materials include veneer, wood veneer, wood plywood, particle board, medium density fiberboard (MDF) made from various materials such as cedar, firewood, firewood, pine, lawan, teak, and melapie. , Chip boards, or composite substrates on which chip boards are laminated. As the wood material, wood plywood, particle board, medium density fiber board (MDF) is preferably used.

  Although the method for sticking the decorative sheet on the adherend is not limited, a method of applying a pressure after laminating the decorative sheet on the adherend via an adhesive is usually employed. What is necessary is just to select an adhesive agent suitably from well-known adhesive agents according to the kind etc. of to-be-adhered material. Examples include polyvinyl acetate, polyvinyl chloride, vinyl chloride-vinyl acetate copolymer, ethylene-acrylic acid copolymer, ionomer, butadiene-acrylonitrile rubber, neoprene rubber, natural rubber, and the like. These adhesives are used alone or in combination of two or more.

  The decorative board manufactured in this way includes, for example, interior materials for buildings such as walls, ceilings, and floors; exterior materials such as balconies and verandas; surface decorative boards and furniture for furniture such as window frames, doors, and handrails; Alternatively, it can be used for a surface decorative plate of a cabinet such as a light electric or OA device.

3. Manufacturing method of decorative sheet As a manufacturing method of a decorative sheet, for example, a manufacturing method of forming a convex part including at least a resin on a base sheet can be mentioned.

  Examples of the method for forming the convex portion with the thermosetting resin include a method in which a solution of the thermosetting resin is applied by a coating method such as a roll coating method or a gravure coating method, followed by drying and curing. Moreover, as a method of forming a convex part with ionizing radiation curable resin, the method of apply | coating the solution of ionizing radiation curable resin by application methods, such as a gravure coat method and a roll coat method, and irradiating ionizing radiation is mentioned, for example. It is done.

  When the decorative sheet of the present invention has a colored concealing layer, a pattern layer, a primer layer, and a transparent resin layer, the resin composition for forming these layers is gravure printing, flexographic printing, silk screen printing, What is necessary is just to form a convex part on an outermost surface layer, after apply | coating and forming by known printing methods, such as offset printing.

  The present invention will be specifically described below with reference to examples and comparative examples. However, the present invention is not limited to the examples.

Examples 1 to 6 and Comparative Examples 1 and 2
(Production of decorative sheet)
As a base material sheet, a general paper for building materials with a rice weighing of 30 g / m ² is prepared, and a solid layer is formed on the entire surface using ink containing acrylic resin as a binder, titanium white, petal, and chrome lead as colorants. It was applied by gravure printing to give a colored hiding layer. A woodgrain pattern pattern layer was formed by gravure printing using an ink containing a nitrocellulose resin and an alkyd resin as a binder and a colorant mainly composed of a dial. The thicknesses of the colored masking layer and the pattern layer were 7 μm and 4 μm, respectively.

  Next, a two-part curable acrylic urethane resin composition containing an acrylic polyol resin as a main agent, tolylene diisocyanate and hexamethylene diisocyanate as a curing agent, and silica particles as a matting agent is prepared, and is transparent by gravure printing on the entire surface A resin layer was formed. The thickness of the transparent resin layer was 10 μm.

  Next, a two-component curable acrylic urethane resin composition containing an acrylic polyol resin as a main agent, hexamethylene diisocyanate as a curing agent, and the fine particles shown in Table 1 is prepared, and a pattern synchronized with the wood grain pattern conduit portion of the pattern layer A convex portion was formed by coating by build-up printing using a gravure plate having a plate depth of 90 μm.

Finally, curing was performed at 70 ° C. for 24 hours to obtain a decorative sheet.
(Production of decorative board)
A vinyl acetate adhesive (manufactured by Chuo Rika Kogyo Co., Ltd .: Rikabond BA-10L (100 parts by weight) on one side of a medium density fiberboard (MDF) with a thickness of 2.5 mm, BA-11B (2 .5 parts by weight) of the adhesive) is applied by a roll coating method so that the amount is 55 g / m ² after drying, and the surface of the decorative sheet on the base sheet side is opposite to the surface of the adhesive. The layers were laminated as follows. Next, press working was performed for 30 seconds under the conditions of 40 ° C. and 1470 kPa, and a decorative sheet was stuck on the MDF. Finally, curing was performed at room temperature for 24 hours to obtain a decorative board.

  The following evaluation was performed about the decorative sheet and decorative board of the said Example and comparative example.

Height of convex part The cross section of the decorative sheet was observed with a scanning electron microscope (SEM), the height of the convex part was measured, and an average value of five points was calculated. The results are shown in Table 1 according to the following criteria.
3: 15 μm or more 2: 10 μm or more and less than 15 μm 1: less than 10 μm
The tactile sensation sheet and the surface of the decorative board were touched by hand to determine the tactile sensation, and evaluated according to the following evaluation criteria. The results are shown in Table 1.
3: A three-dimensional feeling was clearly felt, and a tactile sensation with a high texture was obtained.
2: A three-dimensional feeling was felt.
1: The stereoscopic effect was poor and the tactile sensation was flat.

The convex part of the decorative board was visually confirmed under a light source of a white turbid fluorescent lamp (color rendering AA daylight color, D6500K, manufactured by Panasonic Corporation), and evaluated according to the following evaluation criteria. The results are shown in Table 1.
3: There was no cloudiness and the design feeling was good.
2: The cloudiness was slight and the design feeling was not significantly impaired.
1: A feeling of cloudiness was large, and the design feeling was impaired.

1. Cosmetic sheet 2. 2. base material sheet Pattern layer 4. 4. Transparent resin layer 5. Convex part containing resin Colored concealment layer

Claims (8)

  A decorative sheet in which at least convex portions including a resin are formed on a base sheet, wherein the convex portions contain 15 to 75% by mass of organic particles having an average particle diameter of 12 to 45 μm. Makeup sheet.   The decorative sheet according to claim 1, wherein a height of the convex portion including the resin is 10 μm or more.   The decorative sheet according to claim 1 or 2, wherein the organic particles are resin beads.   The decorative sheet according to claim 3, wherein the resin beads are at least one selected from the group consisting of acrylic beads, urethane beads, nylon beads, and styrene beads.   Furthermore, the decorative sheet in any one of Claims 1-4 which has a pattern pattern layer.   Furthermore, it has a transparent resin layer, the said pattern pattern layer and the said transparent resin layer are laminated | stacked in this order on the base material sheet, and the convex part containing the said resin is formed on the said transparent resin layer. The decorative sheet according to claim 5.   The decorative sheet according to claim 5 or 6, wherein the design pattern layer and the convex portion including the resin are synchronized.   A decorative board obtained by sticking the decorative sheet according to any one of claims 1 to 7 to an adherend.

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