Decorative sheet and decorative material

Abstract

Provided are a decorative sheet and a decorative material having excellent antiviral properties and high processing adaptability. The decorative sheet has a colored layer, a pattern layer, and a surface protective layer having a first surface protective layer containing an antiviral agent, and at least one of a thermosetting resin, an ultraviolet-curable resin, or an electron beam-curable resin, the antiviral agent having an addition amount of 0.2 mass% or more and 10 mass% or less with respect to the surface protective layer, and the antiviral agent having an average particle diameter of 1 µm or more and 10 µm or less.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to a decorative sheet and a decorative material. BACKGROUND

[0002] In the past, regarding a decorative sheet capable of imparting antiviral properties by adding an antiviral agent, since most of the antiviral agent is mixed into a resin to enter a molded product, there has been a problem that the surface does not exhibit antiviral properties.

[0003] In contrast to this, a decorative sheet having excellent antiviral properties has been proposed by adding an antiviral agent to the surface of the decorative sheet (for example, refer to Patent Document 1).

[0004] PRIOR ART DOCUMENTS

[0005] PATENT DOCUMENTS

[0006] Patent Document 1: Japanese Patent Application Publication No. 2015-080887 SUMMARY

[0007] PROBLEMS TO BE SOLVED BY THE INVENTION

[0008] In addition, in the case where the antiviral agent is mixed into a resin for molding or a resin for coating, for example, there has been a problem that the processability (for example, bending processability) of the decorative sheet easily decreases.

[0009] An object of the present disclosure is to provide a decorative sheet and a decorative material having excellent antiviral properties and high processability.

[0010] SOLUTION TO THE PROBLEM

[0011] To solve the above problem, one embodiment of the present disclosure relates to a decorative sheet characterized by comprising a colored layer, a pattern layer, and a surface protective layer, the surface protective layer having a first surface protective layer containing an antiviral agent and at least one of a thermosetting resin, an ultraviolet-curable resin, or an electron beam-curable resin, the antiviral agent being contained in an amount of 0.2% by mass or more and 10% by mass or less with respect to the surface protective layer, and the antiviral agent having an average particle diameter of 1 μm or more and 10 μm or less.

[0012] EFFECT OF THE INVENTION

[0013] According to the decorative sheet of one embodiment of the present disclosure, a decorative sheet and a decorative material having high scratch resistance and antiviral properties can be provided. BRIEF DESCRIPTION OF DRAWINGS

[0014] [ Figure 1 FIG. 1 is a cross-sectional view schematically showing one configuration example of a decorative sheet according to a first embodiment of the present disclosure.

[0015] [Figure 2 FIG. 1 is a cross-sectional view schematically showing a decorative sheet according to a first embodiment of the present disclosure.

[0016] [FIG. 2 is a cross-sectional view schematically showing a decorative sheet according to a modification of the first embodiment of the present disclosure. Figure 3 [FIG. 3 is a cross-sectional view schematically showing a decorative sheet according to a modification of the first embodiment of the present disclosure.

[0017] Figure 4 [FIG. 4 is a cross-sectional view schematically showing a decorative sheet according to a modification of the first embodiment of the present disclosure.

[0018] [FIG. 5 is a cross-sectional view schematically showing a decorative sheet according to a modification of the first embodiment of the present disclosure. Figure 5 DETAILED DESCRIPTION

[0019] One embodiment of the present disclosure will be described with reference to the drawings.

[0020] Here, the configuration shown in the drawings is schematic, and the relationship between the thickness and the planar dimension, the ratio of the thickness of each layer, and the like are different from the actual situation. In addition, the following embodiment example shows a configuration for embodying the technical idea of the present disclosure, and the material, shape, structure, and the like of the constituent members are not limited to the following with respect to the technical idea of the present disclosure. The technical idea of the present disclosure can be variously changed within the technical scope defined by the claims recited in the claims.

[0021] <First Embodiment>

[0022] (Configuration of Decorative Sheet)

[0023] Use Figure 1 The basic configuration of the decorative sheet according to the first embodiment of the present disclosure will be described. Figure 1 FIG. 1 is a cross-sectional view for explaining one configuration example of the decorative sheet 10 according to the first embodiment of the present disclosure.

[0024] As shown in FIG. 1, the decorative sheet 10 according to one embodiment of the present disclosure has, on one face of a colored layer 12, a pattern pattern layer 13 and a surface protective layer 14 laminated in this order. In addition, the surface protective layer 14 has a first surface protective layer 14a and a second surface protective layer 14b. Hereinafter, each layer will be described in detail. Figure 1 (Coloring Layer)

[0025]

[0026] ​​​The colored layer 12 is a layer that serves as a base material of the decorative sheet 10. In the present embodiment, as the colored layer 12, a thermoplastic resin can be used. As the thermoplastic resin, there is no particular limitation, and, for example, a polyolefin resin such as polyethylene, polypropylene, polymethylpentene, polybutene, an ethylene-propylene copolymer, an ethylene-a-olefin copolymer, a propylene-a-olefin copolymer, or the like; an olefin-based copolymer resin such as an ethylene-vinyl acetate copolymer, an ethylene-ethylene vinyl alcohol copolymer, an ethylene-(meth)acrylic acid (ester) copolymer, an ethylene-unsaturated carboxylic acid copolymer metal neutralization (ionomer), or the like; a polyester-based resin such as polyethylene terephthalate, polybutylene terephthalate, polytetramethylene terephthalate, polyethylene naphthalate, polyethylene terephthalate-isophthalate copolymer, 1,4-cyclohexane dimethanol copolymer polyethylene terephthalate, polyarylate, polycarbonate, or the like; an acrylic-based resin such as poly(meth)acrylonitrile, poly(methyl) methacrylate, poly(ethyl) methacrylate, poly(butyl) methacrylate, polyacrylamide, or the like; a polyamide-based resin such as 6-nylon, 6,6-nylon, 6,10-nylon, or the like; a styrene-based resin such as polystyrene, AS resin, ABS resin, or the like; a vinyl-based resin such as polyvinyl chloride, polyvinyl acetate, polyvinyl alcohol, polyvinyl acetal, polyvinyl butyral, or the like; a fluorine-based resin such as polyfluoroethylene, polyvinylidene fluoride, polytetrafluoroethylene, ethylene-tetrafluoroethylene copolymer, ethylene-perfluoroalkyl vinyl ether copolymer, or the like; or a mixture, copolymer, composite, laminate, or the like of two or more of these.

[0027] Here, as the thermoplastic resin that can be used for the colored layer 12, many thermoplastic resins are listed, but in view of the high attention to environmental problems in society in recent years, it is preferable to use a non-halogen-based thermoplastic resin, and it is not preferable to use a thermoplastic resin containing chlorine (halogen) such as polyvinyl chloride resin. In particular, from various aspects of physical properties, processability, versatility, economy, and the like, it is most preferable to use a polyolefin-based resin or a polyester-based resin (amorphous or biaxially stretched) as a non-halogen-based thermoplastic resin.

[0028] As the polyolefin-based resin, any of a variety of resins listed above can be used as appropriate in accordance with the intended use of the decorative sheet, and the like. In particular, polypropylene-based resins, i.e., homopolymers or copolymers in which propylene is the main component, are most suitable for general use. For example, a homopolypropylene resin, a random polypropylene resin, a block polypropylene resin, or the like can be used alone or in appropriate combination, or a resin obtained by further combining a random isotactic polypropylene with them, or the like can be used. In addition, a copolymer containing an olefin-based monomer other than propylene can also be used, and for example, a propylene-a-olefin copolymer having a polypropylene crystalline portion and containing 15 mol% or more of one or two or more kinds of comonomers of a-olefins having 2 to 20 carbon atoms other than propylene, preferably ethylene, butene-1, 4-methylpentene-1, hexene-1, or octene-1, or the like can be exemplified. In addition, a modifier such as low-density polyethylene, an ethylene-a-olefin copolymer, an ethylene-propylene copolymer rubber, an ethylene-propylene-non-conjugated diene copolymer rubber, a styrene-butadiene copolymer, or a hydrogenated product thereof, or the like, which is generally used for softening of polypropylene-based resins, can be added as appropriate.

[0029] In addition, as necessary, one or more kinds of additives selected from various additives such as colorants, fillers, ultraviolet absorbers, light stabilizers, heat stabilizers, antioxidants, antistatic agents, lubricants, flame retardants, antibacterial agents, antifungal agents, friction-reducing agents, light scattering agents, and gloss adjustors, and the like can be added to the colored layer 12.

[0030] The thickness of the colored layer 12 is preferably in the range of 40 μm or more and 150 μm or less, and more preferably 50 μm or more and 130 μm or less. In the case where the thickness of the colored layer 12 is 40 μm or more, the concave-convex and the step, and the like of the floor material as the base can be absorbed, and thus the application of the decorative sheet 10 can be favorably completed. In addition, in the case where the thickness of the colored layer 12 is 150 μm or less, the colored layer 12 of the desired thickness or more is not formed, and thus the manufacturing cost of the decorative sheet 10 can be reduced.

[0031] (Patterned layer)

[0032] The pattern design layer 13 is a layer for adding a pattern for imparting design, which is formed on the colored layer 12, and is provided as necessary. The pattern design layer 13 can be omitted in a case where the colored layer 12 can be replaced with coloring. The pattern design layer 13 is formed by using a printing ink or a paint, etc. in which a coloring agent such as a dye or a pigment is dissolved or dispersed in a proper dilution solvent together with a proper binder resin. The printing ink or the paint, etc. is applied by various printing methods such as a gravure printing method or an offset printing method, various coating methods such as a gravure coating method or a roll coating method, etc. In addition, as the binder resin, for example, a urethane-based resin, an acrylic-based resin, a chlorinated vinyl acetate-based resin, a polyimide-based resin, nitrocellulose, or the like, or a mixture thereof, etc. can be used, but is of course not limited to these. In addition, as the pattern, an arbitrary pattern can be used, and for example, a wood grain pattern, a stone grain pattern, a cloth grain pattern, an abstract pattern, a geometric pattern, a character, a symbol, a single color, or the like, or a combination thereof, etc. can be used. In addition, in order to improve the concealability of the decorative sheet 10, a concealing layer based on an opaque printing ink or a paint containing many opaque pigments such as titanium dioxide or iron oxide can be provided between the pattern design layer 13 and the colored layer 12.

[0033] The thickness of the pattern design layer 13 is preferably in a range of 1 μm or more and 10 μm or less. In a case where the thickness of the pattern design layer 13 is 1 μm or more, the printing can be made clear. In a case where the thickness of the pattern design layer 13 is 10 μm or less, the printing operability at the time of manufacturing the decorative sheet 10 can be improved, and the manufacturing cost can be suppressed.

[0034] In addition, in order to impart various functions, a functional additive such as a body pigment, a plasticizer, a dispersant, a surfactant, a tackiness imparting agent, an adhesion aid, a drying agent, a curing agent, a curing accelerator, and a curing retarder, etc. can also be added to the pattern design layer 13.

[0035] In addition, the pattern design layer 13 can have, for example, a colored layer which is solidly applied in order to conceal the color / pattern of a substrate to which the decorative sheet 10 is attached, and a pattern design layer for adding a pattern for imparting design.

[0036] (Surface protective layer)

[0037] The surface protective layer 14 is a layer formed on the pattern design layer 13, and is a layer provided in order to impart a weather resistance, a scratch resistance, a stain resistance, a design, and the like to the decorative sheet 10.

[0038] The surface protective layer 14 can be a single layer, or can be a plurality of layers stacked as the surface protective layer 14. For example, the surface protective layer 14 can have a first surface protective layer 14a and a second surface protective layer 14b which is stacked on the first surface protective layer 14a. Figure 1As shown, in the decorative sheet 10 of the present embodiment, as the surface protective layer 14, two layers of a first surface protective layer 14a and a second surface protective layer 14b are provided. In the case of a structure in which the surface protective layer 14 is composed of one layer (single layer structure), the first surface protective layer 14a becomes the surface protective layer 14.

[0039] As for the method of forming the surface protective layer 14 including the first surface protective layer 14a and the second surface protective layer 14b, depending on the kind of the curable resin, each layer is coated and the coating film is cured using a known coating device, a heat drying device, and an ultraviolet irradiation device, thereby forming the surface protective layer 14.

[0040] The surface protective layer 14 has an important role in determining the quality of the bending processability, weather resistance, scratch resistance, and cleanability. The surface protective layer 14 is composed mainly of a curable resin (curing resin). That is, it is preferable that the resin component is composed substantially of a curable resin. Substantially means, for example, 80 mass% or more in the case where the entire resin is assumed to be 100 mass%. As needed, the surface protective layer 14 can include various additives such as a weathering agent, a plasticizer, a stabilizer, a filler, a dispersant, a dye, a pigment, a solvent, an ultraviolet absorber, a heat stabilizer, a light stabilizer, an anti-blocking agent, a catalyst scavenger, a colorant, a light scattering agent, and a gloss adjuster.

[0041] [First Surface Protective Layer]

[0042] The first surface protective layer 14a is a layer (first surface protective layer 14a, second surface protective layer 14b) constituting the surface protective layer 14 that is located at the most surface (outermost surface). In the present embodiment, the first surface protective layer 14a includes at least one of a thermally curable resin, an ultraviolet curable resin, or an electron beam curable resin. Note that the electron beam curable resin and the ultraviolet curable resin are collectively referred to as ionizing radiation curable resin. The first surface protective layer 14a can generally be formed by coating a reactive resin to form a coating film, and then curing the coating film by heating or ionizing radiation irradiation. In the first surface protective layer 14a, there are differences in properties due to the difference in the curing method. For example, the first surface protective layer 14a generally formed of an ionizing radiation curable resin tends to have high hardness and excellent scratch resistance because of the high degree of crosslinking after the curing reaction. On the other hand, the first surface protective layer 14a formed of a thermally curable resin tends to have low hardness and excellent flexibility to bend or follow a soft substrate because of the low degree of crosslinking.

[0043] The first surface protective layer 14a can have, as a main component, any one of a thermosetting resin, an ultraviolet-curing resin, or an electron beam-curing resin. That is, the main component of the first surface protective layer 14a can be a thermosetting resin monomer, or an ultraviolet-curing resin or ionizing radiation-curing resin monomer.

[0044] For example, in a case where the decorative sheet 10 is used as a component for a door or window having a complicated shape, softness (for example, workability) is required in many cases. Therefore, for example, in the decorative sheet 10 for a door or window, a thermosetting resin is preferably used as the main component of the first surface protective layer 14a. In addition, in a case where the decorative sheet 10 requires scratch resistance rather than softness, an ionizing radiation-curing resin is preferably used.

[0045] In addition, the main component of the first surface protective layer 14a can also be a mixture of a thermosetting resin, an ultraviolet-curing resin, and an electron beam-curing resin. In a case where the mixture is used as the main component, by controlling the ratio of the thermosetting resin, the ultraviolet-curing resin, or the electron beam-curing resin in the first surface protective layer 14a, the decorative sheet 10 can be used in accordance with the requirements of various uses, depending on the use.

[0046] For example, in a case where the decorative sheet 10 is used for a door or window, the mixture of the thermosetting resin, the ultraviolet-curing resin, and the electron beam-curing resin as the main component of the first surface protective layer 14a preferably contains at most the thermosetting resin. Specifically, in the mixture, the thermosetting resin can be more than 50% by weight, preferably 70% by weight or more, more preferably 75% by weight or more, and further preferably 80% by weight or more.

[0047] In addition, for example, in a case where the decorative sheet 10 is required to have scratch resistance, the mixture of the thermosetting resin, the ultraviolet-curing resin, and the electron beam-curing resin as the main component of the first surface protective layer 14a preferably contains at most at least one of the ultraviolet-curing resin or the electron beam-curing resin. Specifically, in the mixture, the ultraviolet-curing resin or the electron beam-curing resin can be more than 50% by weight, preferably 70% by weight or more, more preferably 75% by weight or more, and further preferably 80% by weight or more.

[0048] In this way, by making the main component of the first surface protective layer 14a, which corresponds to the outermost layer among the surface protective layers 14, a mixture of a thermosetting resin, an ultraviolet-curing resin, and an electron beam-curing resin, it is difficult to cause whitening or cracking of the surface protective layer 14 in bending work while satisfying scratch resistance.

[0049] However, the properties of the decorative sheet 10 such as scratch resistance or processability cannot be determined only by the difference in the curing method of the resin used in the first surface protective layer 14a. With respect to the properties of the decorative sheet 10 (here, scratch resistance or processability), the material design of the resin itself or the addition effect of additives such as fillers, that is, the physical properties of the various components contained in the surface protective layer 14, have a large effect on the properties. Therefore, the design as a whole of the surface protective layer 14 becomes important.

[0050] 〔Ionizing radiation-curable resin〕

[0051] Here, as the ionizing radiation-curable resin (including ultraviolet-curable resin and electron beam-curable resin) for the first surface protective layer 14a, there is no particular limitation, and a transparent resin in which a prepolymer (including an oligomer) and / or a monomer in which a free radical polymerizable double bond capable of undergoing a polymerization crosslinking reaction by irradiation of ionizing radiation such as ultraviolet rays or electron beams is contained in a molecule is used as a main component can be used. These prepolymers or monomers can be used alone or in a mixture of a plurality of kinds. The curing reaction in the ionizing radiation-curable resin is generally a crosslinking curing reaction.

[0052] Specifically, as the above-mentioned prepolymers or monomers, compounds having a (meth)acryloyl group, a (meth)acryloyloxy group, or the like as a free radical polymerizable unsaturated group, a cationic polymerizable functional group such as an epoxy group, or the like can be listed. Here, the (meth)acryloyl group refers to an acryloyl group or a methacryloyl group.

[0053] As the prepolymers having a free radical polymerizable unsaturated group, for example, polyester (meth)acrylate, urethane (meth)acrylate, epoxy (meth)acrylate, melamine (meth)acrylate, triazine (meth)acrylate, silicone (meth)acrylate, or the like can be listed. The molecular weight thereof is generally preferably around 250 to 100,000.

[0054] As the monomers having a free radical polymerizable unsaturated group, for example, as monofunctional monomers, methyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, phenoxyethyl (meth)acrylate, or the like can be listed. In addition, as polyfunctional monomers, for example, diethylene glycol di(meth)acrylate, propylene glycol di(meth)acrylate, trimethylolpropane tri(meth)acrylate, trimethylolpropane ethylene oxide tri(meth)acrylate, dipentaerythritol tetra(meth)acrylate, dipentaerythritol penta(meth)acrylate, dipentaerythritol hexa(meth)acrylate, or the like can be listed.

[0055] As the prepolymer having a cationically polymerizable functional group, for example, the following can be listed: bisphenol-type epoxy resins, novolak-type epoxy compounds, and the like; and prepolymers of vinyl ether-type resins such as fatty acid-type vinyl ethers and aromatic-type vinyl ethers.

[0056] Further, as the prepolymer described above, a polyene / thiol-type prepolymer formed by the combination of a polyene and a polythiol is preferable. As the thiol, for example, the following can be listed: trimethylolpropane trismercaptoacetate, pentaerythritol tetramercaptoacetate, and the like. As the polyene, for example, the following can be listed: a polyene formed by adding an allyl alcohol to both ends of a polyurethane formed from a diol and a diisocyanate.

[0057] As the ionizing radiation for curing the ionizing radiation-curable resin, an electromagnetic wave or a charged particle having energy capable of causing a curing reaction of the molecules in the ionizing radiation-curable resin (composition) can be used. Generally, ultraviolet rays or an electron beam can be used, but visible light, X-rays, ionizing rays, and the like can also be used.

[0058] As the source of ultraviolet rays, for example, a light source such as an ultrahigh-pressure mercury lamp, a high-pressure mercury lamp, a low-pressure mercury lamp, a carbon arc lamp, a black light, a metal halide lamp, and the like can be used. As the wavelength of the ultraviolet rays, a range of 190 nm or more and 380 nm or less is generally preferable.

[0059] As the source of electron beams, for example, various electron beam accelerators such as Cockcroft-Walton type, Van de Graaff type, resonance transformer type, insulated core transformer type, or linear type, Dynamitron type, high-frequency type, and the like can be used. Among them, an electron beam source capable of irradiating electrons having an energy in a range of 100 keV or more and 1000 keV or less is particularly preferable, and an electron beam source capable of irradiating electrons having an energy in a range of 100 keV or more and 300 keV or less is more preferable.

[0060] 〔Thermally curable resin〕

[0061] Here, as the thermally curable resin used in the first surface protective layer 14a, for example, a 2-liquid curing urethane resin can be listed. As the 2-liquid curing urethane resin, there is no particular limitation, and a resin including the following components can be used: a polyol component having an OH group (acrylic polyol, polyester polyol, polyether polyol, epoxy polyol, and the like) as a main agent; and an isocyanate component (toluene diisocyanate, hexamethylene diisocyanate, m-xylene diisocyanate, and the like) as a curing agent component. Further, as the thermally curable resin, not limited to these, a 1-liquid reaction-curing urethane resin, an epoxy resin of 1-liquid or 2-liquid reaction-curing type, and the like can also be used.

[0062] In addition, the surface protective layer 14 is added with a surfactant. The surfactant includes at least one of a cationic surfactant, an amphoteric surfactant, or a nonionic surfactant. By adding the surfactant, the silver-based antiviral agent is compatible with the surface protective layer in the binder, and a decorative sheet in which concentration unevenness caused by precipitation or the like of the antiviral agent in coating is suppressed can be obtained.

[0063] In addition, the thickness of the first surface protective layer 14a is preferably in a range of 3 μm or more and 15 μm or less. If the thickness of the first surface protective layer 14a is 3 μm or more, various resistances such as scratch resistance, abrasion resistance, and weather resistance are improved. If the thickness of the first surface protective layer 14a is 15 μm or less, it is not necessary to use more resin material than the required amount, and the cost can be reduced.

[0064] [Antiviral agent]

[0065] The surface protective layer 14 includes an antiviral agent that improves antiviral properties.

[0066] The antiviral agent is preferably a silver-based material. As the antiviral agent, an inorganic antibacterial agent such as an antibacterial zeolite, an antibacterial apatite, or an antibacterial zirconia in which any one of silver ions, copper ions, and zinc ions is incorporated in a substance such as zeolite, apatite, or zirconia as an inorganic compound can be used, and in addition, as the antiviral agent, pyrithione zinc, 2-(4-thiazolyl)-benzimidazole, 10,10-oxobisphenoxarsine, an organic nitrogen sulfur halogen system, pyridine-2-thiol-oxide, or the like can be used, but in terms of antiviral effect, a silver-based antiviral agent is excellent.

[0067] In addition, the antiviral agent can be configured such that a silver-based material is supported on an inorganic material. By this, a decorative sheet 10 in which the durability of the antiviral effect is excellent can be obtained.

[0068] The addition amount of the antiviral agent in the surface protective layer 14 is in a range of 0.2% by mass or more and 10% by mass or less. In a case where the addition amount of the antiviral agent is 0.2% by mass or more, the antiviral agent effectively functions, and the antiviral properties are improved. In a case where the addition amount of the antiviral agent is 10% by mass or less, the scratch resistance is improved.

[0069] The average particle diameter of the antiviral agent is preferably 0.5 times or more and 2 times or less of the thickness of the surface protective layer 14. That is, when the average particle diameter of the antiviral agent is set to D, the thickness of the surface protective layer is set to d, and the relationship of D ≤ 2d or d ≤ 2D is established. When the thickness of the surface protective layer is set to D, the relationship of D ≤ 2d or d ≤ 2D is preferably established. In a case where the average particle diameter of the antiviral agent is 0.5 times or more and 2 times or less of the surface protective layer 14, the contact area with the antiviral agent and the surface area of the antiviral agent itself are expanded, and thus the antiviral properties become good.

[0070] In addition, the average particle diameter of the antiviral agent is preferably 1 μm or more and 10 μm or less. In the case where the average particle diameter of the antiviral agent is 1 μm or more, the contact area of the surface protective layer 14 with the antiviral agent increases, and the antiviral property becomes good. In the case where the average particle diameter of the antiviral agent is 10 μm or less, the damage resistance increases.

[0071] In addition, a plurality of peaks of the particle diameter of the antiviral agent is preferably present. Specifically, the peaks of the particle diameter of the antiviral agent preferably have two peaks, the two peaks including a first peak in the range of 1 μm or more and 5 μm or less and a second peak in the range of 5 μm or more and 10 μm or less. Here, the second peak of the particle diameter of the antiviral agent is set to a value larger than the first peak. By the presence of a plurality of peaks of the particle diameter of the antiviral agent, the packing density of the antiviral agent further increases, and thus more antiviral agent can be added. Therefore, the contact area with the antiviral agent expands, and the surface area of the antiviral itself also expands, and thus the antiviral property increases.

[0072] In addition, in the decorative sheet 10 according to the present embodiment, as a strategy for improving the stain resistance, for example, a silicone-based component (for example, a silicone resin) or a fluorine-based component (for example, a fluorine resin) can be provided on the outermost surface (the first surface protective layer 14a) of the decorative sheet 10.

[0073] [Silicone Resin]

[0074] In the case where the silicone resin is used, from the viewpoint of adhesion or compatibility with the surroundings, a modified silicone is preferably used. In the case where the curable resin constituting the first surface protective layer 14a is formed of an ultraviolet curable resin or an electron beam curable resin, the modified silicone is preferably a modified silicone resin which is reactive to ionizing radiation. In the case where the curable resin constituting the first surface protective layer 14a is formed of a heat curable resin, the modified silicone is preferably a modified silicone resin which is reactive to heat. In the case where the curable resin constituting the first surface protective layer 14a is formed of a mixture of an ionizing radiation curable resin and a heat curable resin, the above modified silicone is preferably a modified silicone resin which is constituted by at least one of ionizing radiation reactivity and heat reactivity.

[0075] The modified silicone can be classified into a reactive modified silicone and a non-reactive silicone. As the modified silicone which is heat-reactive, a monoamine-modified silicone, a diamine-modified silicone, an epoxy-modified silicone, a methanol-modified silicone, a carboxyl-modified silicone, a mercapto-modified silicone, a silanol-modified silicone, an alcohol-modified silicone, a glycol-modified silicone can be exemplified. In addition, as the modified silicone which is ionizing radiation-reactive, an acrylic acid-modified silicone, a methacrylic acid-modified silicone can be exemplified. In addition, as the non-reactive modified silicone, a polyether-modified silicone, an aralkyl-modified silicone, a long-chain alkyl-modified silicone, a higher fatty acid ester-modified silicone can be exemplified. In addition, as the manufacturers of these modified silicones, Shin-Etsu Chemical Co., Ltd., Dow Corning Toray Co., Ltd., Momentive Performance Materials Japan LLC, Wacker Asahikasei Silicone Co., Ltd., and the like can be listed.

[0076] 〔Fluororesin〕

[0077] It is well known that fluororesins exhibit the minimum level of surface tension, and are suitable as a stain-resistant material. As the fluororesin contained in the first surface protective layer 14a, for example, tetrafluoroethylene resin, tetrafluoroethylene-ethylene copolymer, polyvinylidene fluoride, and the like can be listed, and in addition to these, various derivatives can be used. In addition, as the manufacturers of these fluororesins, Daikin Industries, Ltd., DuPont Mitsui Fluorochemicals Co., Ltd., and the like can be listed. The amount of the fluororesin contained in the first surface protective layer 14a is preferably 10 parts by mass or more and 100 parts by mass or less. More preferably, it is 20 parts by mass or more. Here, the fluororesin itself can also be a curable resin. That is, a part of the fluororesin can also serve as a part of the curable resin which is the main component of the surface protective layer 14 (the first surface protective layer 14a, the second surface protective layer 14b). For example, the entire resin component of the second surface protective layer 14b can be a fluororesin.

[0078] Thus, in the decorative sheet 10 according to the present embodiment, at least any one of the silicone-based component or the fluorine-based component can be contained in the first surface protective layer 14a which is the outermost layer of the surface protective layer 14. Thereby, the stain resistance of the decorative sheet 10 can be improved. When the stain resistance is improved, the virus can be inhibited from remaining on the surface of the decorative sheet 10 for a long time, and as a result, the antiviral property can be further improved.

[0079] In addition, in order to improve the adhesion strength of each layer of the decorative sheet 10, an adhesion layer containing a 2-liquid curing type urethane-based adhesive using an isocyanate-based curing agent can be provided between the pattern layer 13 and the surface protective layer 14.

[0080] [2nd surface protective layer]

[0081] The 2nd surface protective layer 14b is a layer (an inner layer) formed between the outermost layer and the pattern layer 13 among the layers (the 1st surface protective layer 14a, the 2nd surface protective layer 14b) constituting the surface protective layer 14. In the present embodiment, the 2nd surface protective layer 14b contains at least one of a thermally curing type resin, an ultraviolet curing type resin, or an electron beam curing type resin, like the 1st surface protective layer 14a. Note that, as for the thermally curing type resin, the ultraviolet curing type resin, or the electron beam curing type resin, the same as the curing type resin contained in the 1st surface protective layer 14a, and thus the description is omitted.

[0082] The 2nd surface protective layer 14b can contain an antiviral agent and a surfactant, like the 1st surface protective layer 14a. At this time, the antiviral agent contained in the 2nd surface protective layer 14b can be the same material as the antiviral agent contained in the 1st surface protective layer 14a, or can be a different material from the antiviral agent contained in the 1st surface protective layer 14a.

[0083] (Modified example)

[0084] Use Figure 2 A modified example of the decorative sheet according to the 1st embodiment will be described. Figure 2 is a cross-sectional schematic view of one configuration example of the decorative sheet 20 for explaining the modified example of the 1st embodiment. As Figure 2 indicated in the decorative sheet 10, an embossed portion 25 can be formed on the surface of the surface protective layer 14, that is, the surface of the 1st surface protective layer 14a, to impart a predetermined design property. The concave-convex pattern is generally formed by embossing processing. The embossing processing method is not particularly limited. The embossing processing uses a publicly known single-plate or rotary embosser. As the concave-convex shape of the embossed portion 25, for example, there are wood grain board conduit grooves, stone plate surface concaves and convexes (granite cleaved surface or the like), cloth surface texture, satin, sand grains, fine lines, ten-thousand line grooves, and the like.

[0085] [Effects of the 1st embodiment] [Effects of the 1st embodiment]

[0086] The decorative sheet 10 according to the present embodiment has the following effects. [Effects of the 1st embodiment]

[0087] (1) The amount of the antiviral agent added to the decorative sheet 10 of the present embodiment is 0.2 mass% or more and 10 mass% or less. [Effects of the 1st embodiment]

[0088] According to this configuration, higher antiviral properties can be achieved without affecting the strength of the entire decorative sheet.

[0089] (2) The average particle diameter of the antiviral agent of the decorative sheet 10 of the present embodiment is 1 μm or more and 10 μm or less.

[0090] According to this configuration, by expanding the contact area of the antiviral agent, and expanding the surface area of the antiviral agent itself, higher antiviral properties can be achieved.

[0091] <2nd Embodiment>

[0092] (Configuration of decorative sheet)

[0093] Use Figure 3 The decorative sheet according to the 2nd embodiment of the present disclosure will be described. Figure 3 is a cross-sectional view for illustrating one configuration example of the decorative sheet 30 according to the 2nd embodiment of the present disclosure.

[0094] In the decorative sheet 30, the patterned layer 13, the transparent resin layer 36, and the surface protective layer 14 are sequentially stacked on one face of the colored layer 12.

[0095] That is, the decorative sheet 30 differs from the decorative sheet 10 according to the 1st embodiment in that the transparent resin layer 36 is provided.

[0096] Hereinafter, the transparent resin layer 36 will be described. Note that, regarding each layer other than the transparent resin layer 36 (the colored layer 12, the patterned layer 13, and the surface protective layer 14), the same configuration as each layer of the decorative sheet 10 is employed, and thus the description thereof will be omitted.

[0097] (Transparent resin layer)

[0098] As shown in Figure 3 , the transparent resin layer 36 is a layer formed between the patterned layer 13 and the surface protective layer 14.

[0099] The thickness of the transparent resin layer 36 is preferably, for example, 30 μm or more and 200 μm or less. In the case where the thickness of the transparent resin layer 36 is 30 μm or more, the damage resistance of the transparent resin layer 36 to abrasion or scratches of the surface of the decorative sheet is sufficiently improved. In addition, in the case where the thickness of the transparent resin layer 36 is 200 μm or less, the flexibility of the decorative sheet does not become excessively high, and even in the case where the floor material to which the decorative sheet is attached is not flat, the work can be performed in a state where the decorative sheet is in close contact with the floor material.

[0100] [Resin material]

[0101] As the resin material constituting the transparent resin layer 36, for example, a thermoplastic resin can be used as in the colored layer 12. As the thermoplastic resin, there is no particular limitation, and for example, a polyolefin resin such as polyethylene, polypropylene, polymethylpentene, polybutene, ethylene-propylene copolymer, ethylene-a-olefin copolymer, propylene-a-olefin copolymer, or the like; an olefin-based copolymer resin such as ethylene-vinyl acetate copolymer, ethylene-vinyl alcohol copolymer, ethylene-(meth)acrylic acid (ester) copolymer, ethylene-unsaturated carboxylic acid copolymer metal neutralization (ionomer), or the like; a polyester-based resin such as polyethylene terephthalate, polybutylene terephthalate, polytetramethylene terephthalate, polyethylene naphthalate, polyethylene terephthalate-isophthalate copolymer, 1,4-cyclohexane dimethanol copolymer polyethylene terephthalate, polyarylate, polycarbonate, or the like; an acrylic-based resin such as poly(meth)acrylonitrile, poly(meth)acrylate methyl ester, poly(meth)acrylate ethyl ester, poly(meth)acrylate butyl ester, polyacrylamide, or the like; a polyamide-based resin such as 6-nylon, 6,6-nylon, 6,10-nylon, or the like; a styrene-based resin such as polystyrene, AS resin, ABS resin, or the like; a vinyl-based resin such as polyvinyl chloride, polyvinyl acetate, polyvinyl alcohol, polyvinyl acetal, polyvinyl butyral, or the like; a fluorine-based resin such as polyfluoroethylene, polyvinylidene fluoride, polytetrafluoroethylene, ethylene-tetrafluoroethylene copolymer, ethylene-perfluoroalkyl vinyl ether copolymer, or the like; or a mixture, copolymer, composite, laminate, or the like of two or more of them can be used.

[0102] Here, as the thermoplastic resin usable for the transparent resin layer 36, many thermoplastic resins are listed, but in view of the high attention to environmental problems in society in recent years, it is preferable to use a non-halogen-based thermoplastic resin, and it is not preferable to use a thermoplastic resin containing chlorine (halogen) such as polyvinyl chloride resin. In particular, from various aspects of physical properties, processability, versatility, economy, and the like, it is most preferable to use a polyolefin-based resin or a polyester-based resin (amorphous or biaxially stretched) as a non-halogen-based thermoplastic resin.

[0103] As the polyolefin-based resin, any of the various kinds listed above can be used as appropriate in accordance with the intended use of the decorative sheet, and the like. In particular, polypropylene-based resins, i.e., homopolymers or copolymers in which propylene is the main component, are most suitable for general use. For example, a homopolypropylene resin, a random polypropylene resin, a block polypropylene resin, or the like can be used alone or in appropriate combination, or a resin obtained by further combining a random isotactic polypropylene with them, or the like can be used. In addition, it can be a copolymer containing an olefin-based monomer other than propylene, and for example, a propylene-α-olefin copolymer having a polypropylene crystalline portion and containing 15 mol% or more of one or two or more kinds of comonomers of an α-olefin having 2 to 20 carbon atoms other than propylene, preferably ethylene, butene-1, 4-methylpentene-1, hexene-1, or octene-1, or the like can be exemplified. In addition, a modifier such as low-density polyethylene, an ethylene-α-olefin copolymer, an ethylene-propylene copolymer rubber, an ethylene-propylene-non-conjugated diene copolymer rubber, a styrene-butadiene copolymer, or a hydrogenated product thereof, or the like, which is generally used for softening of polypropylene-based resins, can be appropriately added.

[0104] If necessary, for example, one or more kinds of various additives selected from colorants, fillers, ultraviolet absorbers, light stabilizers, heat stabilizers, antioxidants, antistatic agents, lubricants, flame retardants, antibacterial agents, antifungal agents, friction-reducing agents, light scattering agents, gloss adjusters, and the like can be added to the transparent resin layer 36. Note that the transparent resin layer 36 preferably has transparency (colorless transparency, colored transparency, translucency) to the extent that the pattern of the patterned layer 13 can be seen through from the surface (upper surface) of the decorative sheet 30.

[0105] In addition, the transparent resin layer 36 can contain an antiviral agent that improves antiviral properties, as with the surface protective layer 14. By containing an antiviral agent in the surface protective layer 14, antiviral properties can be maintained at the surface of the decorative sheet. By containing an antiviral agent in both the transparent resin layer 36 and the surface protective layer 14, even if the transparent resin layer 36 is exposed due to wear of the surface protective layer 14, antiviral properties are maintained. Thus, it is more preferable that an antiviral agent be contained in both the surface protective layer 14 and the transparent resin layer 36. Note that, regarding the antiviral agent, the same configuration as the antiviral agent contained in the surface protective layer 14 of the decorative sheet 10 is employed, and thus the description is omitted.

[0106] (Modified Example)

[0107] Use Figure 4 A modified example of the decorative sheet according to the second embodiment will be described. Figure 4 is a cross-sectional schematic view of one configuration example of a decorative sheet 40 for explaining the modified example of the second embodiment. As Figure 4As shown, in the decorative sheet 40, an embossing process can be performed on the surface of the transparent resin layer 36 to form an embossed portion 45 to impart a predetermined design property. As the concave-convex shape of the embossed portion 45, similarly to the embossed portion 25 of the decorative sheet 20 of the first embodiment described above, there are, for example, wood grain conduit grooves, stone surface concavities and convexities (granite cleaved surface, etc.), cloth surface textures, satin, sand grains, fine lines, ten-thousand line grooves, and the like. By forming the embossed portion 45 on the transparent resin layer 36, the decorative sheet 40 is imparted with a texture, and the design property can be improved.

[0108] <Effects of the Second Embodiment>

[0109] In addition to the effects of the first embodiment, the decorative sheet 30 according to the present embodiment has the following effects.

[0110] (3) The decorative sheet 30 according to the present embodiment includes the transparent resin layer 36.

[0111] According to this configuration, the strength of the entire decorative sheet can be improved, and cushioning property can be imparted.

[0112] <Third Embodiment>

[0113] Use Figure 5 The decorative material according to the third embodiment of the present disclosure will be described. Figure 5 is a cross-sectional view for explaining one configuration example of the decorative material 50 according to the third embodiment of the present disclosure.

[0114] (Configuration of the decorative material)

[0115] In the decorative material 50, the patterned layer 13 and the surface protective layer 14 are sequentially stacked on one face of the colored layer 12, and the adhesive layer 57 and the door and window substrate 58 are provided on the other face of the colored layer 12.

[0116] That is, the decorative material 50 differs from the decorative sheet 10 according to the first embodiment in that the adhesive layer 57 and the door and window substrate 58 are provided.

[0117] Hereinafter, the adhesive layer 57 and the door and window substrate 58 will be described. Note that, regarding each layer other than the adhesive layer 57 and the door and window substrate 58 (the colored layer 12, the patterned layer 13, and the surface protective layer 14), the same configuration as each layer of the decorative sheet 10 is employed, and thus the description thereof will be omitted.

[0118] (Adhesive layer)

[0119] The adhesive layer 57 is implemented as necessary to improve the adhesion of the adhesive used to bond the substrate on the side opposite the pattern layer 13 in the colored layer 12 of the decorative sheet 50. For example, in the case where the substrate is formed of a wooden material, an adhesive such as a vinyl acetate emulsion system, a 2-liquid curing type urethane system, or the like is used as the adhesive, and thus the adhesive layer 57 is preferably designed with a resin that matches these adhesives. For example, urethane systems, acrylic systems, ethylene-vinyl acetate copolymers, chlorovinyl-vinyl acetate copolymer systems, polyester systems, and the like can be used. In particular, a 2-liquid curing type urethane system primer agent in which a polyester polyol and a polyisocyanate are combined is preferable. In addition, for example, when inorganic powder such as silica, barium sulfate, calcium carbonate, or the like is added, it is effective for preventing blocking during roll storage and improving the adhesion force generated by anchoring.

[0120] (Door and window substrate)

[0121] As the door and window substrate 58, a plywood of a tropical material, a particle board, a medium density fiberboard (hereinafter referred to as MDF), a general plywood specified in Japanese Agricultural Standards, or the like can be used. In addition, a substrate composed of an olefin-based resin to which wood powder is added can also be used. The thickness of the door and window substrate 58 is preferably about 3 mm or more and 25 mm or less. Note that the door and window substrate 58 can also be a metal such as aluminum or a resin such as plastic or a composite material thereof. By forming the door and window substrate 58, it is possible to provide the decorative sheet 50 capable of suppressing the occurrence of damage caused by a shoe heel or a small stone during heavy walking.

[0122] Note that in the present embodiment, the adhesive layer 57 and the door and window substrate 58 are attached to the decorative sheet 10, but the decorative sheet 20, the decorative sheet 30, or the decorative sheet 40 can be used instead of the decorative sheet 10 to form a decorative material.

[0123] <Effects of the Third Embodiment>

[0124] In addition to the effects of the first and second embodiments, the decorative material 50 according to the present embodiment has the following effects.

[0125] (4) The decorative material 50 according to the present embodiment includes the adhesive layer 57 and the door and window substrate 58.

[0126] According to this configuration, it is possible to suppress the occurrence of damage caused by a shoe heel or a small stone during heavy walking.

[0127] Examples

[0128] Hereinafter, the present disclosure will be described in further detail by way of examples, but the present disclosure is not limited in any way by the examples.

[0129] <Example 1>

[0130] A colored thermoplastic resin layer composed of an olefin material was used as a base sheet. A wood grain pattern was printed on it as a pattern layer using a gravure printer. In addition, a transparent sheet composed of an olefin material was pasted on the pattern layer as a transparent resin layer. At this time, the thickness of the transparent resin layer was set to 80 μm. Then, a thermosetting resin (UC CLEAR manufactured by DIC Graphics Corporation) having a thickness of 3 μm was applied as an inner layer of the surface protective layer (2nd surface protective layer). Further, a thermosetting resin (UC CLEAR manufactured by DIC Graphics Corporation) having a thickness of 3 μm was applied as the outermost layer of the surface protective layer (1st surface protective layer). At this time, a silver-based inorganic additive (BIOSAIDO TB-B100 manufactured by Taisho Technos Co., Ltd.) as an antiviral agent was compounded at a solid content ratio of 0.2 mass% in the thermosetting resin of the outermost layer. Note that the antiviral agent is a structure in which silver ions are supported on an inorganic material. In addition, the average particle diameter of the antiviral agent was set to 5 μm. At this time, the 1st peak value of the particle diameter of the antiviral agent was set to 3 μm and the 2nd peak value was set to 7 μm. In addition, the average particle diameter of the antiviral agent was set to 5 μm. The thickness D of the outermost layer of the surface protective layer (1st surface protective layer) was 1.67D (3 μm in this example). Next, the thermosetting resin was cured by heating. As described above, the decorative sheet of Example 1 was produced. The thickness D of the outermost layer of the surface protective layer (1st surface protective layer) was 1.67D (3 μm in this example). Next, the thermosetting resin was cured by heating. As described above, the decorative sheet of Example 1 was produced.

[0131] <Example 2>

[0132] The addition amount of the antiviral agent was changed to 7 mass%. Other than that, the decorative sheet of Example 2 was produced by the same method as Example 1.

[0133] <Example 3>

[0134] The main component of the outermost layer of the surface protective layer (1st surface protective layer) was changed to an ultraviolet-curable resin (urethane acrylate resin manufactured by DIC Graphics Corporation). In addition, the thickness of the outermost layer was changed to 6 μm. Other than that, the decorative sheet of Example 3 was produced by the same method as Example 2.

[0135] <Example 4>

[0136] The main component of the outermost layer of the surface protective layer (1st surface protective layer) was changed to an electron beam-curable resin. Other than that, the decorative sheet of Example 4 was produced by the same method as Example 2.

[0137] <Example 5>

[0138] The addition amount of the antiviral agent was changed to 10 mass%. Other than that, the decorative sheet of Example 5 was produced by the same method as Example 1.

[0139] Example 6

[0140] The addition amount of the antiviral agent was changed to 14 mass%. Other than that, the decorative sheet of Example 6 was produced by the same method as Example 1.

[0141] Example 7

[0142] The average particle diameter of the antiviral agent was changed to 1 μm. Other than that, the decorative sheet of Example 7 was produced by the same method as Example 2.

[0143] Example 8

[0144] The average particle diameter of the antiviral agent was changed to 10 μm. Other than that, the decorative sheet of Example 8 was produced by the same method as Example 2.

[0145] Example 9

[0146] The first peak value of the particle diameter of the antiviral agent was changed to 0.1 μm. Other than that, the decorative sheet of Example 9 was produced by the same method as Example 2.

[0147] Example 10

[0148] The first peak value of the particle diameter of the antiviral agent was changed to 1 μm. Other than that, the decorative sheet of Example 10 was produced by the same method as Example 2.

[0149] Example 11

[0150] The first peak value of the particle diameter of the antiviral agent was changed to 5 μm. Other than that, the decorative sheet of Example 11 was produced by the same method as Example 2.

[0151] Example 12

[0152] The first peak value of the particle diameter of the antiviral agent was changed to 6 μm. Other than that, the decorative sheet of Example 12 was produced by the same method as Example 2.

[0153] Example 13

[0154] The second peak value of the particle diameter of the antiviral agent was changed to 4 μm. Other than that, the decorative sheet of Example 13 was produced by the same method as Example 2.

[0155] Example 14 ​

[0156] The second peak value of the particle diameter of the antiviral agent was changed to 5 μm. Other than this, the decorative sheet of Example 14 was produced by the same method as Example 2.

[0157] <Example 15>

[0158] The second peak value of the particle diameter of the antiviral agent was changed to 10 μm. Other than this, the decorative sheet of Example 15 was produced by the same method as Example 2.

[0159] <Example 16>

[0160] The second peak value of the particle diameter of the antiviral agent was changed to 20 μm. Other than this, the decorative sheet of Example 16 was produced by the same method as Example 2.

[0161] <Example 17>

[0162] The first peak value of the particle diameter of the antiviral agent was changed to 0.1 μm and the second peak value was changed to 4 μm. Other than this, the decorative sheet of Example 17 was produced by the same method as Example 2.

[0163] <Example 18>

[0164] The first peak value of the particle diameter of the antiviral agent was changed to 10 μm and the second peak value was changed to 20 μm. Other than this, the decorative sheet of Example 18 was produced by the same method as Example 2.

[0165] <Example 19>

[0166] The thickness of the surface protective layer was changed to 2 μm. Other than this, the decorative sheet of Example 19 was produced by the same method as Example 2.

[0167] <Example 20>

[0168] The thickness of the surface protective layer was changed to 3 μm. Other than this, the decorative sheet of Example 20 was produced by the same method as Example 2.

[0169] <Example 21>

[0170] The thickness of the surface protective layer was changed to 15 μm. Other than this, the decorative sheet of Example 21 was produced by the same method as Example 2.

[0171] <Example 22>

[0172] The thickness of the surface protective layer was changed to 25 μm. Other than this, the decorative sheet of Example 22 was produced by the same method as Example 2.

[0173] <Example 23>

[0174] The thickness of the transparent resin layer was changed to 20 μm. Other than that, the decorative sheet of Example 23 was produced by the same method as Example 2.

[0175] Example 24

[0176] The thickness of the transparent resin layer was changed to 30 μm. Other than that, the decorative sheet of Example 24 was produced by the same method as Example 2.

[0177] Example 25

[0178] The thickness of the transparent resin layer was changed to 200 μm. Other than that, the decorative sheet of Example 25 was produced by the same method as Example 2.

[0179] Example 26

[0180] The thickness of the transparent resin layer was changed to 210 μm. Other than that, the decorative sheet of Example 26 was produced by the same method as Example 2.

[0181] Comparative Example 1

[0182] The addition of the antiviral agent was omitted in the surface protective layer. Other than that, the decorative sheet of Comparative Example 1 was produced by the same method as Example 1.

[0183] Comparative Example 2

[0184] The amount of the antiviral agent added was changed to 0.1 mass%. Other than that, the decorative sheet of Comparative Example 2 was produced by the same method as Example 1.

[0185] Comparative Example 3

[0186] The average particle diameter (φ) of the antiviral agent was changed to 0.5 μm. Other than that, the decorative sheet of Comparative Example 3 was produced by the same method as Example 2.

[0187] Comparative Example 4

[0188] The average particle diameter (φ) of the antiviral agent was changed to 13 μm. Other than that, the decorative sheet of Comparative Example 4 was produced by the same method as Example 2.

[0189] Evaluation Judgment

[0190] The decorative sheets obtained in Examples 1 to 26 and Comparative Examples 1 to 4 were evaluated for antiviral performance and bending processability by the following methods.

[0191] Evaluation

[0192] [Antiviral Performance]

[0193] The decorative sheet of Examples 1 to 26 and Comparative Examples 1 to 4 was subjected to an antiviral test according to ISO 21702. A 50 mm square test sample was placed in a sterilized petri dish, and 0.4 mL of virus solution was inoculated on the test sample. At this time, the virus solution used was a virus solution containing an enveloped virus (influenza virus). Then, a 40 mm square polyethylene film was overlaid on the test sample. The petri dish was covered, and the virus was allowed to inoculate the test sample under conditions of a temperature of 25°C / humidity of 90% or more. After a predetermined time (24 hours), 10 mL of SCDLP medium was injected into the petri dish to elute the virus. For the eluate, the virus infectivity titer was measured by the plaque method.

[0194] <Measurement of Virus Infectivity Titer (Plaque Method)>

[0195] The host cells were monolayer-cultured on a 6-well plate, and 0.1 mL of each of the eluates diluted in steps was inoculated into the wells. The virus was allowed to adsorb to the cells under conditions of 5% CO2 / temperature of 37°C for 1 hour, and then agar medium was injected into the 6-well plate, and further cultured for 2 to 3 days. After the culture, the cells were fixed / stained, and the number of plaques formed was measured.

[0196] <Calculation of Virus Infectivity Titer>

[0197] The virus infectivity titer per 1 cm2of the test sample was calculated according to the following formula. 2

[0198] V = (10 x C x D x N) / A

[0199] V: Virus infectivity titer per 1 cm2of the test sample (PFU / cm2) 2 2

[0200] C: Number of plaques measured

[0201] D: Dilution ratio of the well in which the plaque was measured

[0202] N: SCDLP amount

[0203] A: Contact area of the test sample with the virus (area of the polyethylene film)

[0204] <Calculation of Antiviral Activity Value>

[0205] The antiviral activity value was calculated according to the following formula. Here, a case where the antiviral activity value is 2 log10or more was determined to have an antiviral effect.

[0206] Antiviral activity value = log(Vb) - log(Vc)

[0207] Log(Vb): Virus infectivity titer per 1 cm2of the unprocessed test sample after 24 hours 2 ​​​Common logarithm value of virus infection titer

[0208] Log (Vc) : Common logarithm value of virus infection titer 2 Common logarithm value of virus infection titer

[0209] The calculated antiviral activity value was evaluated by the following three levels of◎,〇, and×.

[0210] < Evaluation Criteria >

[0211] ◎: The case where the antiviral activity value is 3 log10 or more

[0212] 〇: The case where the antiviral activity value is 2 log10 or more

[0213] ×: The case where the antiviral activity value is less than 2 log10

[0214] 〔Bending Processability〕

[0215] On the surface of MDF (broad-leaved tree) having a thickness of 3 mm as a door and window base material, 100 g / m 2 A two-liquid water-based emulsion adhesive ("Rika Bond" manufactured by Central Physical and Chemical Industry Co., Ltd. (weight ratio BA-10L / BA-11B = 100:2.5) as an adhesive was applied in a wet state, and the decorative sheets of Examples 1 to 14 and Comparative Examples 1 to 4 were respectively attached, and aged for 24 hours, thereby becoming the door and window decorative materials of Examples 1 to 26 and Comparative Examples 1 to 4.

[0216] V-shaped cutting processing was performed on these door and window decorative materials, and the appearance state was confirmed by visually confirming the upper part of the bend. As the V-shaped cutting processing, a V-shaped groove was inserted from the side of the door and window decorative material to which the decorative sheet was not attached to the boundary of the door and window base material and the decorative sheet to which the decorative sheet was attached, in such a manner that the decorative sheet did not have a scratch. Subsequently, the door and window base material was bent to 90 degrees along the V-shaped groove, and the side to which the decorative sheet 1 was attached was made to have a mountain-fold shape.

[0217] < Evaluation Criteria >

[0218] ◎: There is no crack or whitening of the surface protective layer at the upper part of the bend.〇: There is almost no crack or whitening of the surface protective layer at the upper part of the bend.△: There is a crack or whitening of the surface protective layer at the upper part of the bend.×: There is a crack or whitening of the surface protective layer at the upper part of the bend.

[0219] The evaluation results are shown in Table 1.

[0220] [Table 1]

[0221]

[0222] As shown in Table 1, it was found from the evaluation results of Examples 1 to 26 and Comparative Examples 1, 2 that the antiviral property was high when the amount of the antiviral agent was 0.2 mass% or more, as in Examples 1 to 26, as compared with the case where the amount of the antiviral agent was less than 0.2 mass%, as in Comparative Examples 1, 2.

[0223] In addition, it was found from the evaluation results of Examples 1 to 26 and Comparative Examples 3, 4 that the antiviral property was high when the average particle diameter (φ) of the antiviral agent was 1 μm or more and 10 μm or less, as in Examples 1 to 26, as compared with the case where the average particle diameter (φ) of the antiviral agent was less than 1 μm or more than 10 μm, as in Comparative Example 3.

[0224] Note that the decorative sheet and the decorative material of the present disclosure are not limited to the above-described embodiments and examples, and various changes can be made thereto without impairing the features of the invention.

[0225] Explanation of symbols

[0226] 10, 20, 30, 40: decorative sheet

[0227] 50: decorative material

[0228] 12: colored layer

[0229] 13: pattern layer

[0230] 14: surface protective layer

[0231] 14a: first surface protective layer

[0232] 14b: second surface protective layer

[0233] 25, 45: embossed portion

[0234] 36: transparent resin layer

[0235] 57: adhesive layer

[0236] 58: base material for doors and windows

Claims

1. A decorative piece, comprising: Color layer Pattern layer, Surface protective layer, and A transparent resin layer is disposed between the pattern layer and the surface protective layer. The surface protective layer comprises: a first surface protective layer containing at least one of an antiviral agent, a thermosetting resin, an ultraviolet-curable resin, or an electron beam-curable resin; and a second surface protective layer disposed between the first surface protective layer and the pattern layer. The amount of the antiviral agent added relative to the first surface protective layer is more than 0.2% by mass and less than 10% by mass. The antiviral agent has an average particle size of 1 μm to 10 μm. The antiviral agent has multiple peak values ​​in its particle size, and these peak values ​​include: The first peak value is in the range of 1 μm to 5 μm, and the second peak value is in the range of 5 μm to 10 μm. The thickness of the first surface protective layer is more than 3 μm and less than 15 μm. The thickness of the transparent resin layer is between 30 μm and 200 μm.

2. The decorative piece according to claim 1, wherein, The antiviral agent is a silver-based material.

3. The decorative piece according to claim 1 or 2, wherein, The average particle size of the antiviral agent is more than 0.5 times and less than 2 times the thickness of the first surface protective layer.

4. The decorative piece according to claim 1 or 2, characterized in that, The antiviral agent is loaded with inorganic materials.

5. The decorative piece according to claim 1 or 2, wherein, The first surface protective layer contains at least one of an organosilicon-based component or a fluorine-based component.

6. The decorative sheet according to claim 1 or 2, wherein, The first surface protective layer is further enriched with a surfactant.

7. The decorative piece according to claim 6, wherein, The surfactant comprises at least one of a cationic surfactant, an amphoteric surfactant, or a nonionic surfactant.

8. The decorative piece according to claim 1 or 2, wherein, The first surface protective layer is embossed.

9. The decorative piece according to claim 1, wherein, The transparent resin layer is embossed.

10. A decorative material, comprising: The decorative piece according to any one of claims 1 to 9, and A substrate for doors and windows that is adhered to the back of the colored layer of the decorative piece.

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