Decorative sheet and decorative member

Abstract

To provide a decorative sheet and a decorative member having a texture closer to a real thing and excellent design properties.SOLUTION: The decorative sheet 1 includes a colored thermoplastic-resin layer 2, a pattern layer 3, a transparent thermoplastic-resin layer 4, and a surface-protecting layer 5 that are laminated in this order on one side of the colored thermoplastic-resin layer 2, and a light-absorbing part 6 that is disposed on the other side of the colored thermoplastic-resin layer 2 in synchronization with the pattern of the pattern layer 3 and that is formed of a predetermined material having a higher light-absorbing property for light of predetermined wavelengths than for light of other wavelengths, and an embossed part 5a that is formed in the surface-protecting layer 5 at a position overlapping the light-absorbing part 6 in plan view.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a decorative sheet and a decorative member. [Background technology]

[0002] Conventionally, decorative members in which a decorative sheet is bonded to a wooden substrate such as plywood, MDF (medium density fiberboard), or particle board, a resin substrate, an inorganic non-combustible substrate, or a metal substrate have been widely used (see, for example, Patent Document 1). Furthermore, the design of the decorative sheet is often imitated to resemble the surface of wood, stone, or the like. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 5045180 Summary of the Invention [Problem to be solved by the invention]

[0004] Incidentally, decorative sheets tend to have a flat surface texture compared to real wood or stone. Actual wood and stone have unevenness in different areas due to differences in the surface material and structure, resulting in differences in texture. Areas with different textures often also have different colors, but this is not expressed in decorative sheets, and in terms of design, more expensive genuine products are far superior. Furthermore, decorative sheets that have good texture and are highly scratch-resistant are desired for use on flooring, door surfaces, etc.

[0005] The present invention has been made in view of the above-mentioned points, and aims to provide a decorative sheet and decorative member that has a texture closer to the real thing and has excellent design properties and scratch resistance. [Means for solving the problem]

[0006] According to one aspect of the present invention, there is provided a decorative sheet comprising a colored resin layer, a pattern layer, a transparent resin layer, and a surface protective layer laminated in this order on one side of the colored resin layer, a light absorbing portion arranged on the other side of the colored resin layer in synchronization with the pattern of the pattern layer and formed of a predetermined material that is more light absorbing for light of a predetermined wavelength than for light of other wavelengths, and an embossed portion formed on the surface protective layer at a position that overlaps with the light absorbing portion in a planar view, wherein the surface protective layer comprises a first surface protective layer that contains an ionizing radiation curable resin and is the outermost layer, and a second surface protective layer that contains a urethane bonded resin and is provided on the transparent resin layer side of the first surface protective layer.

[0007] According to another aspect of the present invention, there is provided a decorative member comprising a substrate and a decorative sheet of the above aspect provided on at least one side of the substrate via a primer layer, wherein the substrate is any one of a wood substrate, a resin substrate, a non-flammable substrate, and a metal substrate. [Effects of the Invention]

[0008] According to one embodiment of the present invention, decorative sheets and decorative members that have a texture closer to the real thing and have excellent design and scratch resistance can be easily obtained. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a cross-sectional view schematically illustrating an example of a decorative sheet according to one embodiment of the present invention. [Figure 2] FIG. 2 is a process diagram schematically illustrating an example of a procedure for producing the decorative sheet shown in FIG. [Figure 3] FIG. 10 is a cross-sectional view schematically illustrating an example of a decorative member according to a modified example of an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, embodiments of the present technology will be described with reference to the drawings. The drawings are schematic, and the relationship between thickness and planar dimensions, the thickness ratio of each layer, etc., differ from the actual ones. The layers do not necessarily have to be stacked in the order shown in the drawings, as long as they are within the scope of the present disclosure. Layers not shown in the drawings may also be added. Furthermore, the embodiments shown below are illustrative of configurations that embody the technical ideas of the present disclosure, and the materials, shapes, structures, etc. of the components of the present disclosure are not limited to those described below. The technical ideas of the present disclosure may be modified in various ways within the technical scope defined by the claims.

[0011] Furthermore, the directions of "left and right" and "up and down" in the following explanation are merely definitions for the convenience of explanation and do not limit the technical idea of ​​the present disclosure. Therefore, for example, if the page is rotated 90 degrees, "left and right" and "up and down" are read interchangeably, and if the page is rotated 180 degrees, "left" becomes "right" and "right" becomes "left."

[0012] [Configuration of decorative sheet] 1, a decorative sheet 1 according to one embodiment of the present invention is formed by laminating, in this order, a colored thermoplastic resin layer (colored resin layer) 2, a design layer 3, a transparent thermoplastic resin layer (transparent resin layer) 4, and a surface protective layer 5, with an embossed portion 5a formed in the surface protective layer 5. Furthermore, a light absorbing portion 6 is formed on the surface of the colored thermoplastic resin layer 2 opposite the design layer 3, and a primer layer 7 is formed so as to cover the light absorbing portion 6 and the colored thermoplastic resin layer 2.

[0013] [Colored thermoplastic resin layer] Examples of materials for the colored thermoplastic resin layer 2 include polyvinyl chloride, polyethylene terephthalate, polybutylene terephthalate, polyamide, polyethylene, polypropylene, polycarbonate, polyethylene naphthalate, ethylene-vinyl acetate copolymer, ethylene-acrylic acid copolymer, ethylene-acrylic acid ester copolymer, ionomer, acrylic acid ester, and methacrylic acid ester. Among these, polyolefin-based resins are preferred in terms of environmental compatibility, processability, and cost. The grade and composition of the resin can also be selected taking into consideration ease of sheeting, printability, and suitability for bending.

[0014] The hue of the colored thermoplastic resin layer 2 can be appropriately selected as the base color of the design layer 3. The colored thermoplastic resin layer 2 can be colored, for example, by mixing or kneading a colorant such as a pigment into the thermoplastic resin during sheeting. Alternatively, the colored thermoplastic resin layer 2 can be provided as a solid ink layer using a coating or printing technique before providing the light-absorbing portion 6.

[0015] The thickness of the colored thermoplastic resin layer 2 is not particularly limited, but is preferably about 30 μm to 150 μm in terms of ensuring hiding power and cost.

[0016] [Picture layer] The design layer 3 is a printed layer on which a design pattern is printed to impart design to the decorative sheet 1. Known printing methods can be used to form the design layer 3. The printing method is not particularly limited, but gravure printing is preferred considering productivity and design quality. For example, if the colored thermoplastic resin layer 2 is available in a rolled state, printing to form the design layer 3 can be performed using a roll-to-roll printing device. Other printing methods include offset printing, screen printing, flexographic printing, electrostatic printing, inkjet printing, and transfer printing from a transfer sheet. When using such printing methods, the design pattern of the design layer 3 can be formed by multicolor printing using the usual process colors of yellow, red, blue, and black, or by multicolor printing using special colors, in which plates of the individual colors that make up the design pattern are prepared.

[0017] Furthermore, the pattern of the pattern layer 3 may be any pattern, taking into consideration the design of the flooring or fittings. For example, a marble grain pattern can be used to evoke the image of a stone floor such as marble. For example, various wood grains or cork can be used as the pattern for a wood-based design. In addition to patterns of natural materials, artificial patterns based on these motifs or geometric patterns can also be used. Other examples of patterns include wood grain patterns composed of spring wood and autumn wood regions and vessels in the cross section of tree rings, leather (grain) patterns, stone grain patterns on the surface of stone such as marble, granite, and sandstone, sand grain patterns, tile patterns, brickwork patterns, fabric patterns, geometric shapes, letters, symbols, abstract patterns, floral patterns, landscapes, characters, and the like.

[0018] Printing ink is a mixture of a solvent and solid components such as a colorant and a binder resin. Examples of solvents include petroleum-based organic solvents such as hexane, heptane, octane, toluene, xylene, ethylbenzene, cyclohexane, and methylcyclohexane; ester-based organic solvents such as ethyl acetate, butyl acetate, 2-methoxyethyl acetate, and 2-ethoxyethyl acetate; alcohol-based organic solvents such as methyl alcohol, ethyl alcohol, normal propyl alcohol, isopropyl alcohol, isobutyl alcohol, ethylene glycol, and propylene glycol; ketone-based organic solvents such as acetone, methyl ethyl ketone, methyl isobutyl ketone, and cyclohexanone; ether-based organic solvents such as diethyl ether, dioxane, and tetrahydrofuran; chlorine-based organic solvents such as dichloromethane, carbon tetrachloride, trichloroethylene, and tetrachloroethylene; and inorganic solvents such as water. The solvents may be used alone or in combination of two or more.

[0019] Examples of binder resins include chlorine-based resins, urethane resins, acrylic urethane resins, acrylic resins, polyester resins, polyamide resins, butyral resins, polystyrene resins, nitrocellulose resins (nitrocellulose), and cellulose acetate resins. Examples of chlorine-based resins include polyvinyl chloride resins such as polyvinyl chloride, chlorinated polyethylene, polyvinylidene chloride, ethylene-vinyl chloride copolymers, vinyl chloride-vinyl acetate copolymers, and vinyl chloride-vinyl acetate-(meth)acrylic copolymers, as well as polypropylene chloride and chlorinated polypropylene. Here, (meth)acrylic means acrylic or methacrylic. The binder resin may be a single type or a combination of two or more types.

[0020] Examples of colorants include inorganic pigments such as carbon black, iron black, titanium white (titanium oxide), antimony white, yellow lead, titanium yellow, red iron oxide, cadmium red, ultramarine blue, and cobalt blue; and organic pigments such as quinacridone red, isoindolinone yellow, and phthalocyanine blue. The colorants may be used alone or in combination of two or more. Here, the solvent contained in the printing ink will eventually volatilize, so the design layer 3 is formed mainly from solid components such as colorants and binder resins.

[0021] The printing ink may also contain other components such as stabilizers, plasticizers, catalysts, and curing agents. The printing ink may be selected based on the printing method. It is preferable to select the printing ink taking into consideration adhesion to the colored thermoplastic resin layer 2, printability, and weather resistance as a flooring material or fitting. The thickness of the design layer 3 can be adjusted appropriately, taking into consideration the decorative properties required of the design layer 3, the three-dimensional formability of the decorative sheet 1, and the like. The thickness of the design layer 3 is typically 1 μm or more and 1 mm or less, preferably 2 μm or more and 0.1 mm or less, and more preferably 2 μm or more and 50 μm or less.

[0022] To improve the adhesion between the design layer 3 and the transparent thermoplastic resin layer 4, an adhesive layer (not shown) may be provided on the surface of the design layer 3 that comes into contact with the transparent thermoplastic resin layer 4. By strengthening this adhesion, the decorative sheet 1 can be given the ability to be bent to conform to curved surfaces and right-angled surfaces. The resin used in the adhesive layer (not shown) is not particularly limited, and for example, a two-component curing urethane resin can be used. The adhesive resin may also be adhered to the design layer 3 with a urethane adhesive. For example, a coating device or a gravure printing device can be used to apply the resin used in the adhesive layer (not shown).

[0023] Furthermore, a glittering layer (not shown) may be provided between the picture layer 3 and the transparent thermoplastic resin layer 4 in order to suitably impart design effects such as a sense of depth and brightness to the decorative sheet 1. The glittering layer (not shown) preferably contains a glittering pigment and a binder resin. Examples of glittering pigments include pearlescent pigments and metallic pigments. Pearlescent pigments are particularly preferred because they can prevent a decrease in the light transmittance of the glittering layer and therefore do not impair the visibility of the picture layer 3.

[0024] Pearl pigments are pigments that can impart pearlescent luster. Examples include base particles whose surfaces are coated with a metal oxide. The base particles are preferably scaly particles such as mica. Examples of metal oxides include oxides of metals such as titanium, iron, zirconium, silicon, aluminum, and cerium. The metal oxides may be used alone or in combination. Specific examples include oxide-coated mica such as titanium mica, iron oxide-coated mica, iron oxide-coated mica titanium, Prussian blue-coated mica titanium, Prussian blue-iron oxide-coated mica titanium, chromium oxide-coated mica titanium, carmine-coated mica titanium, organic pigment-coated mica titanium, titanium oxide-coated mica, and titanium oxide-coated synthetic mica; oxide-coated glass powder such as titanium oxide-coated glass powder and iron oxide-coated glass powder; oxide-coated metal particles such as titanium oxide-coated aluminum powder; scaly flakes such as basic lead carbonate, lead hydrogen arsenate, and bismuth oxide chloride; fish scale powder, shell fragments, and pearl fragments.

[0025] Examples of metallic pigments include pigments made of metals such as aluminum, brass, stainless steel, tin, zinc, copper, nickel, gold powder, and silver, and alloys of these metals. The metallic pigments may be used alone or in combination of two or more. From the viewpoint of providing excellent design effects, for example, when forming the glittering layer using gravure printing, the average particle diameter of the glittering pigment is preferably 40 μm or less, and more preferably 30 μm or less. From the same viewpoint, the ratio of [average particle diameter of glittering pigment / thickness of glittering layer] is preferably 0.01 or more and 15 or less, and more preferably 0.5 or more and 10 or less. In this specification, "average particle diameter" refers to the value that can be determined as the mass average value D50 in particle size distribution measurement using laser light diffraction method.

[0026] Examples of binder resins include thermoplastic resins and cured products of curable resin compositions, with the cured products of curable resin compositions being preferred from the viewpoint of durability. Examples of cured products of curable resin compositions include cured products of thermosetting resin compositions and cured products of ionizing radiation curable resin compositions. From the viewpoint of interlayer adhesion, the cured products of thermosetting resin compositions are preferred.

[0027] Examples of thermosetting resin compositions used in the glossy layer include polyester resin compositions, epoxy resin compositions, polyurethane resin compositions, aminoalkyd resin compositions, melamine resin compositions, guanamine resin compositions, urea resin compositions, and thermosetting acrylic resin compositions. These thermosetting resin compositions include monomers and / or prepolymers constituting each resin, and a curing agent added as needed. The ionizing radiation-curable resin composition used in the glossy layer can be the same as the ionizing radiation-curable resin composition of the surface protective layer 5 described below.

[0028] The content of the glittering pigment in the glittering layer is preferably 10 parts by mass or more and 90 parts by mass or less, and more preferably 50 parts by mass or more and 80 parts by mass or less, relative to 100 parts by mass of the binder resin. By setting the content of the glittering pigment to 10 parts by mass or more, it is possible to impart a sufficient glossy appearance, and by setting it to 90 parts by mass or less, it is possible to prevent impairment of the visibility of the picture layer 3. From the same viewpoint, the thickness of the glittering layer is preferably 1 μm or more and 30 μm or less, and more preferably 5 μm or more and 20 μm or less.

[0029] The glittering layer can be formed into any pattern depending on the design desired. Examples include wood grain, leather, stone, sand, tile, brickwork, fabric, geometric shapes, letters, symbols, abstract patterns, floral patterns, landscapes, and characters. It is preferable that the arbitrary pattern have shading to further enhance the design effect. Shading may be formed by varying the size or thickness of the halftone dots, but it is preferable to form it by varying the density of the halftone dots (i.e., the size of the halftone dots is uniform and the shading is formed by the density of the halftone dots).

[0030] The glittering layer can be formed, for example, by applying a coating liquid containing a glittering pigment and a binder resin using a general-purpose printing method such as gravure printing. When the shade of the glittering layer is formed by the density of halftone dots, the halftone dots on the printing plate can be formed using an FM (frequency modulation) screen.

[0031] [Transparent thermoplastic resin layer] The transparent thermoplastic resin layer 4 is a resin layer that provides thickness and depth for design purposes, as well as protecting the design layer 3 and imparting good surface properties to improve the weather resistance and abrasion resistance of the decorative sheet 1. The material for the transparent thermoplastic resin layer 4 is not particularly limited, and examples include vinyl chloride resin, acrylic resin, and polyolefin resin (polypropylene resin, polyethylene resin). Polyolefin resins are particularly preferred in terms of environmental compatibility, processability, and price. The grade and composition of the resin can be selected taking into consideration not only environmental compatibility, processability, and price, but also ease of sheeting, printability, and suitability for bending. When selecting a material for bending, it is important to consider the prevention of whitening or cracking at the bent portion.

[0032] A lamination method can be used as a method for forming the transparent thermoplastic resin layer 4. Furthermore, for example, when the transparent thermoplastic resin layer 4 and an adhesive layer (not shown) are formed simultaneously, a method can be used in which they are formed by co-extrusion. The thickness of the transparent thermoplastic resin layer 4 is not particularly limited, but is preferably about 30 μm to 150 μm in terms of ensuring hiding power and cost.

[0033] [Surface protective layer] The surface protective layer 5 is a layer that imparts surface properties such as abrasion resistance to the decorative sheet 1. The surface protective layer 5 also adjusts the surface gloss of the decorative sheet 1. The surface protective layer 5 is formed of two layers, including a second surface protective layer 52 formed on the transparent thermoplastic resin layer 4, and a first surface protective layer 51 laminated on the opposite side of the second surface protective layer 52 from the transparent thermoplastic resin layer 4. When laminating the first surface protective layer 51 and the second surface protective layer 52, each layer can be coated and the coating cured using a known coating device, heat drying device, or ionizing radiation irradiation device depending on the type of curable resin.

[0034] The surface protective layer 5 is a layer whose main component is a curable resin. That is, it is preferable that the resin component of the surface protective layer 5 is substantially composed of a curable resin. "Substantially" refers to, for example, 80 parts by mass or more when the total resin is 100 parts by mass. The surface protective layer 5 may contain weathering agents, plasticizers, stabilizers, fillers, dispersants, colorants such as dyes and pigments, solvents, etc., as needed.

[0035] The first surface protective layer 51 is formed from a resin whose main component is a resin composition containing an ionizing radiation curable resin, i.e., substantially from an ionizing radiation curable resin, and the second surface protective layer 52 is formed from a resin whose main component is a resin composition containing a urethane bonded resin, i.e., substantially from a urethane bonded resin.

[0036] The ionizing radiation-curable resin is not particularly limited. For example, a transparent resin primarily composed of a prepolymer (including oligomer) and / or monomer containing a radically polymerizable double bond in the molecule that can undergo polymerization and crosslinking upon irradiation with ionizing radiation such as infrared rays, ultraviolet rays, or electron beams can be used. These prepolymers or monomers can be used alone or in combination. Specific examples of prepolymers or monomers include compounds having radically polymerizable unsaturated groups such as (meth)acryloyl groups and (meth)acryloyloxy groups, and cationically polymerizable functional groups such as epoxy groups in the molecule. Polyene / thiol-based prepolymers, which are a combination of polyene and polythiol, are also preferred. Here, the term "(meth)acryloyl group" refers to an acryloyl group or a methacryloyl group.

[0037] Examples of prepolymers having a radically polymerizable unsaturated group include polyester (meth)acrylate, urethane (meth)acrylate, epoxy (meth)acrylate, melamine (meth)acrylate, triazine (meth)acrylate, silicone (meth)acrylate, etc. The molecular weight of these is preferably about 250 to 100,000. Furthermore, examples of the monomer having a radically polymerizable unsaturated group include monofunctional monomers such as methyl(meth)acrylate, 2-ethylhexyl(meth)acrylate, and phenoxyethyl(meth)acrylate. Examples of the polyfunctional monomer include diethylene glycol di(meth)acrylate, propylene glycol di(meth)acrylate, trimethylpropane tri(meth)acrylate, trimethylolpropane ethylene oxide tri(meth)acrylate, dipentaerythritol tetra(meth)acrylate, dipentaerythritol penta(meth)acrylate, and dipentaerythritol hexa(meth)acrylate.

[0038] Examples of prepolymers having a cationically polymerizable functional group include prepolymers of epoxy resins such as bisphenol-type epoxy resins and novolac-type epoxy compounds, and vinyl ether resins such as fatty acid vinyl ethers and aromatic vinyl ethers. Examples of polyene-based prepolymers include those obtained by adding allyl alcohol to both ends of polyurethanes made from diols and diisocyanates, and examples of thiol-based prepolymers include polythiols such as trimethylolpropane trithioglycolate and pentaerythritol tetrathioglycolate.

[0039] The ionizing radiation may be, for example, electromagnetic waves or charged particles having energy sufficient to cause a curing reaction of molecules in an ionizing radiation-curable resin (composition). Examples of the curing reaction include crosslinking and curing reactions. The ultraviolet light source may be, for example, an ultra-high pressure mercury lamp, a high pressure mercury lamp, a low pressure mercury lamp, a carbon arc lamp, a black light, or a metal halide lamp. The wavelength of the ultraviolet light is preferably, for example, 190 nm or more and 380 nm or less. The electron beam source may be, for example, an electron beam accelerator such as a Cockcroft-Walton type, a Van de Graaf type, a resonant transformer type, an insulating core transformer type, a linear type, a dynamitron type, or a high-frequency type. In particular, those capable of irradiating electrons having an energy of 100 keV or more and 1000 keV or less (more preferably, an electron having an energy of 100 keV or more and 300 keV or less) are preferred.

[0040] The urethane bonded resin is not particularly limited, and examples of the urethane bonded resin include a urethane bonded resin obtained by reacting a polyester polyol resin with an isocyanate curing agent. The thickness of the first surface protective layer 51 and the second surface protective layer 52 is not particularly limited, but is preferably within the range of 1 μm or more and 10 μm or less.

[0041] [Embossed part] An embossed portion 5a having a concave-convex pattern is formed from the surface of the first surface protective layer 51 to the transparent thermoplastic resin layer 4 to impart a given design. Examples of the concave-convex pattern include the duct grooves of a wood grain board, the concave-convex surface of a stone slab (such as a cleavage plane of granite), the texture of a cloth surface, a matte finish, a sand grain, a hairline, and a linear groove. The concave-convex pattern of the embossed portion 5a is provided so that it matches the design of the design layer 3.

[0042] The uneven pattern can be formed, for example, by embossing. The embossing method is not particularly limited. For example, a known sheet-fed embossing machine or rotary embossing machine can be used. This allows the decorative sheet 1 to be given a good texture that is close to that of real wood or stone. [Light absorbing part] The light-absorbing portion 6 is formed of a material that absorbs light of a predetermined wavelength, such as a material that absorbs infrared rays. That is, the light-absorbing portion 6 is formed of a material with low infrared transmittance, and a material with significantly lower infrared transmittance than the other layers. The light-absorbing portion 6 is formed of, for example, a material containing black ink containing carbon black, such as a urethane-based printing ink. The ink forming the light-absorbing portion 6 absorbs all light in the infrared wavelength range, but may be a material that absorbs light with wavelengths between 800 nm and 2500 nm more than light with other wavelengths. For example, the ink may be at least one inorganic material selected from the group consisting of carbon black, tin-doped indium oxide, antimony-doped tin oxide, lanthanum hexaboride, and cesium-doped tungsten oxide.

[0043] The light absorbing portions 6 are arranged on the opposite side of the colored thermoplastic resin layer 2 from the pattern layer 3, at positions that are in harmony with the pattern of the pattern layer 3. For example, if the pattern layer 3 has a wood grain pattern, the light absorbing portions 6 are formed at positions that overlap with the wood grain board conduit grooves of the pattern layer 3 in a planar view. Note that "in harmony" here means that the light absorbing portions 6 are formed at positions that overlap with the pattern of the pattern layer 3 in a planar view. The thickness of the light absorbing portions 6 may be any thickness that can soften the transparent thermoplastic resin layer 4 and the surface protective layer 5 to an extent that allows sufficient formation of unevenness in the surface protective layer 5 during embossing, which will be described later. Specifically, the thickness of the light absorbing portions 6 is 1 μm or more and 1 mm or less, preferably 1 μm or more and 0.1 mm or less, and more preferably 1 μm or more and 50 μm or less. In order to obtain a sufficient gloss matte effect, it is preferable that the difference in gloss level between the portion where the light absorbing portions 6 are formed and the portion where they are not formed is 5 or more in plan view, i.e., the image density level is preferably 60% or more.

[0044] [Primer layer] The primer layer 7 is a base layer that improves adhesion and corrosion resistance with a substrate (not shown) to which the decorative sheet 1 is attached. The primer layer 7 is formed on the surface of the colored thermoplastic resin layer 2 opposite the pattern layer 3 so as to cover the light absorbing parts 6. The primer layer 7 is formed using, for example, polyester resin, organic additives, pigments, etc. The primer layer 7 may contain an anti-rust pigment to improve corrosion resistance. The thickness of the primer layer 7 is, for example, in the range of 1 μm to 10 μm. The primer layer 7 is not necessarily provided.

[0045] [Method for manufacturing decorative sheet] Next, an example of a method for producing a decorative sheet according to this embodiment will be described with reference to FIG. First, a colored thermoplastic resin layer 2 is formed. For example, the colored thermoplastic resin layer 2 is formed using a PE (polyethylene) resin (FIG. 2(a)).

[0046] Next, the design layer 3 is printed on one surface of the colored thermoplastic resin layer 2 using, for example, a urethane-based printing ink. Next, a transparent thermoplastic resin layer 4 made of, for example, petroleum PP (polypropylene) resin is laminated by extrusion lamination on the surface of the design layer 3 opposite to the colored thermoplastic resin layer 2 (FIG. 2(b)).

[0047] Next, a second surface protective layer 52, primarily composed of a resin composition containing a urethane-bonded resin, is coated on the surface of the transparent thermoplastic resin layer 4 opposite the pattern layer 3, and then cured by high-pressure mercury UV irradiation. Next, a first surface protective layer 51, primarily composed of a resin composition containing an ionizing radiation-curable resin, is coated on top of the second surface protective layer 52, and after coating, the solvent is volatilized and the layer is cured by a urethane reaction. This results in the pattern layer 3, transparent thermoplastic resin layer 4, second surface protective layer 52, and first surface protective layer 51 being laminated in this order on one surface of the colored thermoplastic resin layer 2 (FIG. 2(b)).

[0048] An adhesive layer may be provided between the design layer 3 and the transparent thermoplastic resin layer 4 using an adhesive resin, or an adhesive resin and a urethane adhesive. Next, a black ink made of a urethane-based printing ink containing an infrared absorbing material is printed on the surface of the colored thermoplastic resin layer 2 opposite the pattern layer 3 to form a light absorbing portion 6 (Figure 2(c)).

[0049] Next, a primer layer 7 made of, for example, a polyester resin is formed on the colored thermoplastic resin layer 2 including the light absorbing portions 6 so as to fill the gaps between the light absorbing portions 6 and cover the upper surface thereof (FIG. 2(d)).

[0050] Next, the laminate formed by stacking these layers is heated with an infrared heater (FIG. 2(e)), after which an embossing plate such as an embossing roll is pressed onto the surface of the first surface protective layer 51 (FIG. 2(f)). This forms the embossed portion 5a, and the decorative sheet 1 is formed. Here, the pattern of the embossing plate preferably has a pattern such as a matte finish in which relatively small depressions are randomly arranged, and it is preferable to select the pattern of the embossing plate so that multiple depressions and protrusions are formed in one embossed portion 5a.

[0051] Here, the light-absorbing portion 6 is formed of black ink having infrared absorbing properties. Furthermore, the light-absorbing portion 6 is made of a material with significantly lower infrared transmittance than the other layers. Therefore, the infrared transmittance of the region where the light-absorbing portion 6 is formed is higher than the infrared transmittance of the region where the light-absorbing portion 6 is formed in a planar view, resulting in a difference in infrared transmittance in the laminate shown in FIG. 2(e) in a planar view. Therefore, when the laminate is irradiated with infrared rays using an infrared heater, the transparent thermoplastic resin layer 4 and the surface protective layer 5 are more likely to soften in the portions of the surface protective layer 5 that overlap with the light-absorbing portion 6 in a planar view, i.e., the portions with high infrared absorptivity, compared to the portions not overlapping with the light-absorbing portion 6. In other words, after infrared irradiation, the transparent thermoplastic resin layer 4 and the surface protective layer 5 have portions that are easily softened and portions that are difficult to soften.

[0052] Therefore, when an embossing plate is pressed against the surface protective layer 5 in this state, unevenness is likely to be formed in the softened portions, and unevenness is unlikely to be formed in the portions that do not soften. In other words, unevenness is likely to be formed in the softened portions of the transparent thermoplastic resin layer 4 and the surface protective layer 5, i.e., in the portions that overlap with the light absorbing portions 6 in a planar view. As a result, embossed portions 5a having an uneven shape are likely to be formed in positions that overlap with the light absorbing portions 6 of the transparent thermoplastic resin layer 4 and the surface protective layer 5 in a planar view, i.e., positions that are in phase with the light absorbing portions 6.

[0053] This allows the embossed portions 5a to be formed at positions synchronized with the pattern of the pattern layer 3, that is, the embossed portions 5a synchronized with the pattern layer 3 can be easily created without performing a highly accurate positioning operation. Then, the surface protective layer 5 thus has areas where the embossed portions 5a are formed and areas where the embossed portions 5a are substantially not formed, resulting in the development of a gloss matte finish.

[0054] For example, if the light-absorbing portion 6 is positioned at the position of the wood grain vessel groove of the pattern layer 3 and a matte embossing plate is pressed onto the pattern, a relatively strong matte unevenness will be formed in the part corresponding to the wood grain vessel groove, and the matte unevenness will not be as strong in the part other than the part corresponding to the wood grain vessel groove, resulting in a gloss matte effect and a more realistic representation of the wood grain vessel groove part.

[0055] It is considered that the heat energy retained by the light absorbing parts 6 due to infrared irradiation is affected by the infrared transmittance and reflectance of each layer constituting the laminate, but the heat energy retained by the other layers is uniform regardless of whether the light absorbing parts 6 are formed or not. Furthermore, the heat energy retained by each layer due to infrared irradiation is minute compared to the energy absorbed in the light absorbing parts 6 and is negligible. Therefore, the influence of the infrared transmittance and reflectance of the other layers on the development of gloss matte can be considered to be negligible, and it can be considered that gloss matte is developed due to the relative difference between the heat energy retained by the area where the light absorbing parts 6 are formed and the heat energy retained by the area where the light absorbing parts 6 are not formed.

[0056] The timing for pressing the embossing plate onto the surface protective layer 5 after infrared irradiation is not limited to immediately after infrared irradiation, but may be any timing that allows the plate to be pressed onto the surface of the surface protective layer 5 to selectively form an uneven shape in the portions of the transparent thermoplastic resin layer 4 and the surface protective layer 5 that have been softened by infrared irradiation.

[0057] In addition, other processes may be included between the process of creating the surface protection layer 5 and the process of performing infrared irradiation, and the key point is that the infrared irradiation should be performed in a state where the transparent thermoplastic resin layer 4 and the surface protection layer 5 have been formed.

[0058] [Effects of this embodiment] (1) In the decorative sheet 1 according to this embodiment, a laminate in which each layer is stacked is irradiated with infrared rays, and then an embossing plate is pressed onto the laminate, so that the portions that overlap with the light-absorbing portions 6 in plan view can be embossed relatively strongly. In other words, embossed portions can be easily formed in desired positions without the need for highly accurate positioning of the areas where the embossing plate is pressed. As a result, a decorative sheet with excellent design properties can be easily obtained.

[0059] Furthermore, because the light absorbing parts 6 are provided on the opposite side of the colored thermoplastic resin layer 2 from the pattern layer 3, even if the light absorbing parts 6 are formed using black ink, the color of the light absorbing parts 6 can be prevented from showing through when the decorative sheet 1 is viewed from the surface protective layer 5 side. Therefore, in order to prevent the color of the light absorbing parts 6 from showing through, the color tone of the pattern layer 3 is not limited to dark colors, and the pattern layer 3 can be expressed in a range of colors from dark to light, while also achieving a glossy and matte appearance.

[0060] Furthermore, the surface protective layer 5 has a two-layer structure consisting of a first surface protective layer 51, which forms the outermost layer, and which is primarily composed of a resin composition containing an ionizing radiation-curable resin, and a second surface protective layer 52, which is primarily composed of a resin composition containing a urethane-bonded resin. When the surface protective layer 5 is primarily composed of a resin composition containing an ionizing radiation-curable resin, the surface protective layer may be too hard and have poor processability, while when the surface protective layer is primarily composed of a resin composition containing a urethane-bonded resin, the surface protective layer tends to be too soft and have poor scratch resistance. However, by forming the surface protective layer 5 into a two-layer structure consisting of the first surface protective layer 51, which is primarily composed of a resin composition containing an ionizing radiation-curable resin, and the second surface protective layer 52, which is primarily composed of a resin composition containing a urethane-bonded resin, and by forming the first surface protective layer 51 as the outermost layer, a surface protective layer of appropriate hardness can be obtained, and a decorative sheet with good scratch resistance and processability can be obtained. The decorative sheet 1 can withstand complex processing and is highly scratch-resistant, so it is not easily damaged over time and can maintain its beauty even when applied to flooring, door surfaces, etc.

[0061] (2) By using an acrylic ionizing radiation curable resin as the ionizing radiation curable resin contained in the first surface protective layer 51, the surface protective layer 5 can be given more appropriate properties, and a decorative sheet with excellent scratch resistance and processability can be easily obtained. (3) By using a resin composition containing an acrylate monomer and an acrylate oligomer as the ionizing radiation curable resin contained in the first surface protective layer 51, the surface protective layer 5 can be given more appropriate properties, and a decorative sheet with excellent scratch resistance and processability can be easily obtained.

[0062] (4) By using at least one inorganic material selected from the group consisting of carbon black, tin-doped indium oxide, antimony-doped tin oxide, lanthanum hexaboride, and cesium-doped tungsten oxide as the predetermined material constituting the light absorbing portion 6, the portions of the surface protective layer 5 and the transparent thermoplastic resin layer 4 that overlap with the light absorbing portion 6 in a planar view can be softened more reliably, and a decorative sheet with excellent design properties can be easily obtained. (5) Furthermore, by providing the decorative sheet 1 on at least one surface of the substrate to form a decorative member, a decorative member with excellent scratch resistance can be obtained.

[0063] [Modification] As shown in Fig. 3, the decorative sheet 1 according to the above embodiment may be attached to a base material 9, which is a base material for a decorative member, to form a decorative member 10. In the decorative member 10, the decorative sheet 1 may be provided on at least one side of the base material 9, or may be provided on both sides.

[0064] [Base material] The substrate 9 can be any of a wood substrate, a resin substrate, a non-combustible substrate, and a metal substrate. Examples of wood substrates include wood veneer, wood plywood, laminated lumber, particle board, medium-density fiberboard, and hard fiberboard. Examples of resin substrates include plastic and other resins, or composite materials thereof. Examples of non-combustible substrates include non-combustible steel plates or substrates made of non-combustible materials specified in Ministry of Construction Notification No. 1400. Examples of metal substrates include steel plates and aluminum plates. The substrate 9 can also be made of plastic and other resins, or composite materials thereof. That is, the substrate 9 can be a resin substrate. The substrate 9 can also be made of non-combustible steel plates or non-combustible materials specified in Ministry of Construction Notification No. 1400.

[0065] Thus, the decorative member 10 comprises a base material 9 and a decorative sheet 1 provided on at least one surface of the base material 9. The base material 9 can be any of a wood base material, a resin base material, a non-flammable base material, and a metal base material.

[0066] As described above, the decorative sheet 1 has a primer layer 7, which ensures adhesion to the substrate 9, thereby preventing the decorative member 10 from peeling off between the decorative sheet 1 side and the substrate 9 side. Furthermore, when the embossed portions 5a are formed, heat is applied to improve the surface strength of the decorative sheet 1, so by using this decorative sheet 1, a decorative member 10 can be obtained that has good bending suitability while maintaining surface strength. [Example]

[0067] The present invention will be described in detail below with reference to examples and comparative examples, but the present invention is not limited to the following examples.

[0068] Example 1 A colored thermoplastic resin layer 2 (55 μm thick) consisting of a PE (polyethylene) layer was formed, and a design layer 3 consisting of a urethane-based printing ink and a transparent thermoplastic resin layer 4 (80 μm thick) consisting of a petroleum-based PP (polypropylene) layer were laminated on one side of this layer in this order. Furthermore, a second surface protective layer 52 mainly composed of a resin composition containing a urethane-bonded resin was coated on the side of the transparent thermoplastic resin layer 4 opposite the design layer 3. A first surface protective layer 51 mainly composed of a resin composition containing an acrylic ionizing radiation-curable resin was coated on this second surface protective layer 52, thereby forming a surface protective layer 5 consisting of a 3 μm-thick first surface protective layer 51 and a 3 μm-thick second surface protective layer 52. Specifically, the first surface protective layer 51 was primarily composed of a UV resin containing an acrylic ionizing radiation-curable resin composed of an acrylate monomer and an acrylate oligomer. The second surface protective layer 52 was mainly composed of a resin composition containing a polyester polyol resin as a urethane bond type resin and an isocyanate curing agent.

[0069] At this time, the pattern layer 3 and the transparent thermoplastic resin layer 4 were bonded together by providing an adhesive layer (not shown) made of an adhesive resin containing a urethane-based adhesive between the pattern layer 3 and the transparent thermoplastic resin layer 4. Furthermore, on the other surface of the colored thermoplastic resin layer 2, i.e., the surface opposite to the design layer 3, a black ink made of a urethane-based printing ink containing an infrared absorbing material was pattern-printed to form light-absorbing portions 6. A primer layer 7 was formed on the colored thermoplastic resin layer 2 including the light-absorbing portions 6, to obtain the laminate shown in Fig. 2(d).

[0070] This laminate was heated with an infrared heater, and then an embossing roll with a matte or other pattern was pressed against the surface protective layer 5, i.e., the first surface protective layer 51, to form an embossed portion 5a, thereby obtaining the decorative sheet 1 shown in Figure 1.

[0071] The transparent thermoplastic resin layer 4 was prepared in the following manner. First, 500 ppm of a hindered phenol antioxidant (Irganox 1010, manufactured by BASF Japan Ltd.), 2000 ppm of a benzotriazole ultraviolet absorber (Tinuvin 328, manufactured by BASF Japan Ltd.), and 2000 ppm of a hindered amine light stabilizer (Chimasorb 944, manufactured by BASF Japan Ltd.) were added to a polypropylene resin, and the resulting resin was extruded using a melt extruder to form an 80 μm thick polypropylene transparent resin sheet to be used as the transparent thermoplastic resin layer 4. Subsequently, both sides of the formed transparent resin sheet were subjected to a corona treatment to set the surface wetting tension to 40 dyn / cm or more. This procedure resulted in the formation of a transparent thermoplastic resin layer 4.

[0072] Example 2 A decorative sheet was obtained in the same manner as in Example 1, except that the thickness of the first surface protective layer 51 in the decorative sheet of Example 1 was changed to 6 μm. Example 3 A decorative sheet was obtained in the same manner as in Example 1, except that the thickness of the first surface protective layer 51 in the decorative sheet of Example 1 was changed to 9 μm.

[0073] Example 4 In the decorative sheet of Example 1, the first surface protective layer 51 was formed primarily from a UV resin containing an acrylic ionizing radiation curable resin consisting only of acrylate monomers, and the thickness of the second surface protective layer 52 was 6 μm. The decorative sheet was obtained in the same manner as in Example 1. Example 5 In the decorative sheet of Example 1, the first surface protective layer 51 was formed primarily from a UV resin containing an acrylic ionizing radiation curable resin consisting only of acrylate oligomer, and had a thickness of 6 μm, and the decorative sheet was obtained in the same manner as Example 1, except that the second surface protective layer 52 had a thickness of 6 μm.

[0074] Example 6 In the decorative sheet of Example 1, the first surface protective layer 51 was formed primarily from a UV resin containing an acrylic ionizing radiation curable resin consisting only of acrylate oligomer, and had a thickness of 9 μm, and the decorative sheet was obtained in the same manner as in Example 1, except that the second surface protective layer 52 had a thickness of 6 μm. Example 7 In the decorative sheet of Example 1, the first surface protective layer 51 was formed primarily from a UV resin containing an acrylic ionizing radiation curable resin consisting only of acrylate oligomer, and the decorative sheet was obtained in the same manner as in Example 1, except that the thickness of the second surface protective layer 52 was 9 μm.

[0075] Example 8 In the decorative sheet of Example 1, the first surface protective layer 51 was formed primarily from a UV resin containing an acrylic ionizing radiation curable resin consisting only of acrylate oligomer, and had a thickness of 6 μm, and the decorative sheet was obtained in the same manner as Example 1, except that the second surface protective layer 52 had a thickness of 9 μm. Example 9 In the decorative sheet of Example 1, the first surface protective layer 51 was formed primarily from a UV resin containing an acrylic ionizing radiation curable resin consisting only of acrylate oligomer, and had a thickness of 9 μm, and the decorative sheet was obtained in the same manner as in Example 1, except that the second surface protective layer 52 had a thickness of 9 μm.

[0076] (Comparative Example 1) In the decorative sheet of Example 1, the decorative sheet was obtained in the same manner as in Example 1, except that the first surface protective layer 51 was formed using a resin whose main component was a resin composition containing the same urethane-bonded resin as the second surface protective layer 52. (Comparative Example 2) In the decorative sheet of Example 1, the first surface protective layer 51 was formed using a resin whose main component was a resin composition containing the same urethane-bonded resin as the second surface protective layer 52, and the thicknesses of the first surface protective layer 51 and the second surface protective layer 52 were each 6 μm, except that the decorative sheet was obtained in the same manner as Example 1.

[0077] (Comparative Example 3) In the decorative sheet of Example 1, the first surface protective layer 51 was formed using a resin whose main component was a resin composition containing the same urethane-bonded resin as the second surface protective layer 52, and the thicknesses of the first surface protective layer 51 and the second surface protective layer 52 were each 9 μm, except that the decorative sheet was obtained in the same manner as Example 1. Comparative Example 4 In the decorative sheet of Example 1, the second surface protective layer 52 was formed using a resin whose main component was a resin composition containing the same acrylic ionizing radiation curable resin as the first surface protective layer 51, except that the decorative sheet was obtained in the same manner as in Example 1.

[0078] (evaluation) The decorative sheets of Examples 1 to 9 and Comparative Examples 1 to 4 were evaluated for pencil hardness, Hoffman scratch test, sliding properties, curved surface processability, and gloss matte (GM) design properties. The evaluation methods are as follows.

[0079] (Pencil hardness) A pencil hardness test was conducted on a decorative member made by bonding a decorative sheet to MDF (medium density fiberboard) using pencils of different hardness, and the surface hardness was evaluated by checking for damage (gouges) that occurred on the surface (surface protective layer). After conducting the pencil hardness test using a pencil with a hardness of 4B or higher, if damage occurred on the surface, it was evaluated as "◎". After conducting the pencil hardness test using a pencil with a hardness of 5B or higher, if damage occurred on the surface, it was evaluated as "○". In addition, after conducting the pencil hardness test using a pencil with a hardness of 6B or lower, if damage occurred on the surface, it was evaluated as "×".

[0080] (Hoffman scratch test) A scratch test was performed on the surface of the decorative sheet using a Hoffman scratch hardness tester (manufactured by GARDCO), with a scratch blade (a cylindrical blade with a diameter of 7 mm) set so that it was in contact with the surface at a 45-degree angle, and the tester was moved over the decorative sheet to check for scratches. The load (weight) was gradually increased (in 200g increments) within the range of 200g to 2000g, and the sample was scratched, and the load (g) at which the sample surface was scratched was used for evaluation. If damage occurred under a load of 800 g, "600 g" was recorded in Table 1 as the withstand load. A load capacity of 200g was deemed to be a failure.

[0081] (Sliding properties) The sliding properties of the felt were confirmed using a crock meter. Load: 500g / cm 2 The number of rubbing cycles was gradually increased in increments of 500 between 500 and 2000 cycles to check the sliding properties. If there was no difference in the gloss matte design after 2000 times, it was marked as "OK" (passed). If there was no difference in the gloss matte design after 100 to 1500 times, it was marked as "△", and if there was a difference in the gloss matte design after 500 times, it was marked as "×" (fail).

[0082] (Curved surface workability) Double-sided tape was attached to the back of the decorative sheet, which was then attached to MDF (medium density fiberboard) with various R-shaped processing, and evaluation was performed.

[0083] As a result, samples that did not show whitening or cracking were rated as "◯" (pass), and samples that showed whitening or cracking were rated as "×" (fail).

[0084] (Gloss Matte (GM) design) [Gloss measurement] After embossing each of the decorative sheets of Examples 1 to 9 and Comparative Examples 1 to 4, the specular gloss of the area that overlaps the light-absorbing portion of the surface protective layer in a planar view was measured at an incident angle of 85° using a micro-TRI-gloss manufactured by BYK.

[0085] [Difference in gloss] For each of the decorative sheets of Examples 1 to 9 and Comparative Examples 1 to 4, after embossing, the specular gloss of the portions that did not overlap with the light-absorbing portions of the surface protective layer in plan view was measured in the same manner as in the gloss measurement, and the difference between the specular gloss of the portions that overlap with the light-absorbing portions of the surface protective layer in plan view and the specular gloss of the portions that did not overlap with the light-absorbing portions of the surface protective layer in plan view was determined. The presence or absence of gloss matte was confirmed based on the difference in specular gloss thus determined.

[0086] [Gloss Matte Design] For each of the decorative sheets of Examples 1 to 9 and Comparative Examples 1 to 4, the difference in specular gloss and the state of the gloss matte effect were visually evaluated.

[0087] The evaluation criteria were as follows: ◯: The difference in specular gloss is 3 or more, a stable gloss-matt effect is exhibited, and the light-absorbing portion is almost invisible from the surface protective layer side. △: The difference in specular gloss is 3 or more, and a stable gloss-matt effect is achieved, but the light-absorbing part is visible from the surface protection layer side. ×: Regardless of the visibility of the light-absorbing portion from the surface protective layer side, the difference in glossiness is less than 3, and the gloss-matt effect is not fully exhibited. The evaluation results are shown in Table 1.

[0088] [Table 1]

[0089] As can be seen from Table 1, Examples 1 to 9, in which the first surface protective layer 51 was a surface protective layer whose main component was a resin composition containing an acrylic ionizing radiation curable resin, and the second surface protective layer 52 was a surface protective layer whose main component was a resin composition containing a urethane bond type resin, passed all evaluation items, and good evaluation results were obtained regardless of the thickness of the second surface protective layer 52. Furthermore, the load capacity in the Hoffman scratch test increased as the thickness of the first surface protective layer 51 increased.

[0090] In contrast, in the case of Comparative Example 1, in which both the first surface protective layer 51 and the second surface protective layer 52 were surface protective layers whose main component was a resin composition containing a urethane bond-type resin, the pencil hardness failed, but the other items passed, but the load capacity in the Hoffman scratch test was slightly lower than that of the decorative sheets in the Examples. Furthermore, in the case of Comparative Example 4, in which both the first surface protective layer 51 and the second surface protective layer 52 were surface protective layers whose main component was a resin composition containing an acrylic ionizing radiation-curable resin, the curved surface processability failed when the radius was 1R and 3R, but passed when the radius was 5R. All other items except for curved surface processability passed. It was also confirmed that all decorative sheets achieved good gloss and matte designs.

[0091] The present invention can have the following configurations, for example. (1) a colored resin layer, and a patterned layer, a transparent resin layer, and a surface protective layer laminated in this order on one surface of the colored resin layer; a light absorbing portion disposed on the other surface of the colored resin layer in synchronization with the pattern of the pattern layer, the light absorbing portion being made of a predetermined material that has higher light absorption for light of a predetermined wavelength than for light of other wavelengths; an embossed portion formed in the surface protective layer at a position overlapping the light absorbing portion in a plan view, The surface protective layer includes a first surface protective layer containing an ionizing radiation curable resin and serving as an outermost layer; a second surface protective layer containing a urethane bond type resin provided on the transparent resin layer side of the first surface protective layer, said second surface protective layer comprising a urethane bond type resin. (2) The decorative sheet according to (1) above, wherein the ionizing radiation curable resin is an acrylic ionizing radiation curable resin. (3) The decorative sheet according to (1) above, wherein the ionizing radiation curable resin contains an acrylate monomer and an acrylate oligomer. (4) The decorative sheet according to any one of (1) to (3) above, characterized in that the predetermined material is at least one inorganic material selected from the group consisting of carbon black, tin-doped indium oxide, antimony-doped tin oxide, lanthanum hexaboride, and cesium-doped tungsten oxide. (5) A substrate; and a decorative sheet according to any one of (1) to (4) above, which is provided on at least one surface side of the substrate via a primer layer, The decorative member is characterized in that the substrate is any one of a wood substrate, a resin substrate, a non-flammable substrate, and a metal substrate. [Explanation of symbols]

[0092] 1 decorative sheet 2 Colored thermoplastic resin layer 3. Picture layer 4 Transparent thermoplastic resin layer 5 Surface protective layer 6 Light absorbing part 7 Primer layer 9 Base material 10 Decorative materials

Claims

1. a colored resin layer, and a pattern layer, a transparent resin layer, and a surface protective layer laminated in this order on one surface of the colored resin layer; a light absorbing portion disposed on the other surface of the colored resin layer in synchronization with the pattern of the pattern layer, the light absorbing portion being made of a predetermined material that has higher light absorption for light of a predetermined wavelength than for light of other wavelengths; an embossed portion formed in the surface protective layer at a position overlapping the light absorbing portion in a plan view, The surface protective layer includes a first surface protective layer containing an ionizing radiation curable resin and serving as an outermost layer; a second surface protective layer containing a urethane-bonded resin provided on the transparent resin layer side of the first surface protective layer.

2. 2. The decorative sheet according to claim 1, wherein the ionizing radiation curable resin is an acrylic ionizing radiation curable resin.

3. 2. The decorative sheet according to claim 1, wherein the ionizing radiation curable resin contains an acrylate monomer and an acrylate oligomer.

4. 3. The decorative sheet according to claim 1, wherein the predetermined material is at least one inorganic material selected from the group consisting of carbon black, tin-doped indium oxide, antimony-doped tin oxide, lanthanum hexaboride, and cesium-doped tungsten oxide.

5. A substrate; The decorative sheet according to claim 1 or 2, which is provided on at least one surface side of the substrate via a primer layer, The decorative member is characterized in that the substrate is any one of a wood substrate, a resin substrate, a non-flammable substrate, and a metal substrate.

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