Decorative sheet, decorative member and method for producing decorative sheet

Abstract

To provide a decorative sheet which has a texture close to a texture of a surface of wood and stone used in a building material, and has excellent designability.SOLUTION: A decorative sheet 1 includes: a pattern layer 3, a transparent thermoplastic resin layer 4 and a surface protective layer 5 which are laminated in this order on one surface of a colored thermoplastic resin layer 2; a pattern part 6 for gloss-matte expression which is laminated on the other surface of the colored thermoplastic resin layer 2, and has a predetermined material having higher light absorption property than that of other light to light of a predetermined wave length and higher light absorption property than that of the colored thermoplastic resin layer 2 arranged in synchronization with a pattern of the pattern layer 3; and a mirror surface region 5a which is formed in a part overlapping the pattern part 6 for gloss-matte expression in plan view, of the surface protective layer 5.SELECTED DRAWING: Figure 1

Description

[Technical Field]

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

[0002] Conventionally, decorative materials 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 often imitates 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 different textures due to differences in the surface material and structure, resulting in unevenness in different locations. Areas with different textures often also have different colors, but this is not expressed in decorative sheets, and in terms of design, more expensive real ones are superior.

[0005] The present invention has been made in consideration of these points, and aims to provide a decorative sheet, decorative member, and method for manufacturing a decorative sheet that has a texture similar to the surface texture of wood, stone, etc. used in building materials, and has excellent durability and design properties. [Means for solving the problem]

[0006] According to one aspect of the present invention, a decorative sheet is provided which comprises a pattern layer, a transparent resin layer and a surface protective layer laminated in that order on one side of a colored resin layer, and a gloss matte-producing pattern portion which is arranged on the other side of the colored resin layer in synchronization with the pattern of the pattern layer and is formed of a specified material which has higher light absorption for light of a specified wavelength than light of other wavelengths and has higher light absorption for light of the specified wavelength than the colored resin layer, and which has a mirror-like area in a position on the surface protective layer which overlaps with the portion where the specified material is arranged in a planar view.

[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-described aspect provided on at least one surface of the substrate, wherein the substrate is any one of a wood substrate, a resin substrate, a non-flammable substrate, and a metal substrate.

[0008] Furthermore, according to another aspect of the present invention, there is provided a method for manufacturing a decorative sheet, comprising the steps of: laminating a colored resin layer, a pattern layer, a transparent resin layer, and a surface protective layer in this order; forming a pattern portion for producing gloss matte using a predetermined material that has the property of absorbing light of a predetermined wavelength more than light of other wavelengths and more than the colored resin layer at a position synchronized with the pattern of the pattern layer on the other side of the colored resin layer; after the laminating step and the step of forming the pattern portion for producing gloss matte, irradiating with light of a wavelength in which the power of the light of the predetermined wavelength is greater than the power of light of the other wavelengths; and after the step of irradiating with light, providing a mirror finish to the surface protective layer to make the surface of the surface protective layer a mirror surface, thereby forming a mirror area. [Effects of the Invention]

[0009] According to one embodiment of the present invention, decorative sheets and decorative members can be easily obtained that have a texture similar to the surface texture of wood, stone, and other building materials, and that have excellent durability and design. [Brief explanation of the drawings]

[0010] [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]1 is a process diagram showing an example of a manufacturing process for a decorative sheet according to one embodiment of the present invention. [Figure 3] 1 is a cross-sectional view schematically illustrating an example of a decorative member according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0011] 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.

[0012] 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."

[0013] [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 pattern layer 3, a transparent thermoplastic resin layer (transparent resin layer) 4, and a surface protective layer 5, with a mirror area 5a formed in the surface protective layer 5. Furthermore, a matte gloss pattern portion 6 is formed on the surface of the colored thermoplastic resin layer 2 opposite the pattern layer 3, and a primer layer 7 is formed so as to cover the matte gloss pattern portion 6 and the colored thermoplastic resin layer 2.

[0014] [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.

[0015] The hue of the colored thermoplastic resin layer 2 can be appropriately selected as the base color of the picture 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 can be provided as a solid ink layer using a coating or printing method before providing the matte gloss pattern portion 6. The thickness of the colored thermoplastic resin layer 2 is not particularly limited.

[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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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).

[0031] 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.

[0032] [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.

[0033] 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.

[0034] [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 may be a single layer or multiple layers. For example, the surface protective layer 5 may be formed by providing two layers, a first surface protective layer (not shown) and a second surface protective layer (not shown), in this order on the transparent thermoplastic resin layer 4. When providing a surface protective layer 5 consisting of a first surface protective layer (not shown) and a second surface protective layer (not shown), each layer may be applied and the coating cured using a known coating device, heat drying device, or ionizing radiation irradiation device depending on the type of curable resin.

[0035] The surface protective layer 5 is primarily composed of 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.

[0036] The material for the surface protective layer 5 is not particularly limited, and examples thereof include ionizing radiation-curable resins and two-component curable urethane-based resins. The ionizing radiation-curable resin is not particularly limited. For example, a transparent resin primarily composed of a prepolymer (including oligomers) and / or monomer containing a radically polymerizable double bond in the molecule that can undergo polymerization and crosslinking upon exposure to ionizing radiation such as infrared, ultraviolet, 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 containing 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] The two-component curing urethane resin is not particularly limited. For example, a resin containing a polyol component having OH groups as a base component and an isocyanate component as a curing agent component can be used. Examples of the polyol component having OH groups include acrylic polyol, polyester polyol, polyether polyol, and epoxy polyol. Examples of the isocyanate component include tolylene diisocyanate, hexamethylene diisocyanate, and metaxylene diisocyanate.

[0042] Furthermore, the surface protection layer 5 may be formed mainly from an acrylic resin composition, or may be formed mainly from both an ionizing radiation curable resin and an acrylic resin composition, or may be formed mainly from an ionizing radiation curable resin. The thickness of the surface protection layer 5 is not particularly limited.

[0043] [Mirror area] The surface of the surface protection layer 5 is provided with a mirror surface area 5a, which has a mirror surface, in order to impart a given design. The mirror surface area 5a can be formed by stamping a flat mirror surface plate.

[0044] [Non-specular area] The non-mirror area 5b, which is the area other than the mirror area 5a of the surface protection layer 5, is an area that has not been subjected to mirror finishing. The non-mirror region 5b need not be mirror-finished, and may have an uneven pattern, such as a wood grain vascular groove, a stone slab surface unevenness (such as a granite cleavage plane), a cloth surface texture, a matte finish, a sand grain, a hairline, or a linear groove.

[0045] The uneven pattern of the non-mirror region 5b 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 texture that is close to that of real wood or stone.

[0046] [Gloss matte pattern] The matt gloss pattern portion 6 is made of a material that is more light absorbing for light of a predetermined wavelength than for light of other wavelengths, and is made of a predetermined material that is more light absorbing for light of the predetermined wavelength than the colored thermoplastic resin layer 2, for example, a material that has infrared absorption properties. In other words, a material with low infrared transmittance is used for the matt gloss pattern portion 6, and a material with significantly lower infrared transmittance than the other layers is used. The matt gloss pattern portion 6 is made of a material containing black ink containing carbon black, for example, a urethane-based printing ink, etc.

[0047] The matt gloss developing pattern portion 6 is arranged on the opposite side of the colored thermoplastic resin layer 2 from the pattern layer 3, in a position that is in harmony with the pattern of the pattern layer 3. For example, in the case of a marble-like pattern layer 3, the matt gloss developing pattern portion 6 is formed in a position that overlaps with the base color tone of the pattern layer 3 in a planar view. Here, "in harmony" means that the matt gloss developing pattern portion 6 is formed in a position that overlaps with the pattern of the pattern layer 3 in a planar view.

[0048] The thickness of the matte gloss developing pattern portion 6 may be any thickness that can soften the transparent thermoplastic resin layer 4 and the surface protective layer 5 to an extent that a mirror surface shape can be sufficiently formed in the surface protective layer 5 during the mirror finishing process described below. In order to obtain a sufficient matte gloss effect, it is preferable that the difference in gloss level between the area where the matte gloss developing pattern portion 6 is formed and the area where it is not formed is 5 or more in plan view, that is, the image density level is preferably 60% or more.

[0049] [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 pattern portion 6 for expressing the gloss matte finish. The primer layer 7 is formed using, for example, a polyester-based resin such as a polyester urethane resin, organic additives, pigments, etc. Anti-rust pigments may be blended into the primer layer 7 to improve corrosion resistance. The thickness of the primer layer 7 is, for example, in the range of 1 μm to 10 μm.

[0050] [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, form the colored thermoplastic resin layer 2. For example, a colored film made of PBT (polybutylene terephthalate) resin and having a thickness of 50 μm is used as the colored thermoplastic resin layer 2 (FIG. 2(a)).

[0051] 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 pattern portion 6 for producing a matte gloss finish is formed on the surface of the colored thermoplastic resin layer 2 opposite to the pattern layer 3. For example, the pattern portion 6 for producing a matte gloss finish is formed at a predetermined position in harmony with the pattern of the pattern layer 3 using a urethane-based printing ink containing black ink containing carbon black (FIG. 2(b)).

[0052] Next, a primer layer 7 made of, for example, polyester urethane resin is formed on the colored thermoplastic resin layer 2 including the pattern portion 6 for expressing gloss matte, filling the gaps between the pattern portions 6 for expressing gloss matte and covering the upper surface thereof (Figure 2(c)).

[0053] Next, a transparent thermoplastic resin layer 4 made of, for example, a PP (polypropylene) resin having a thickness of 80 μm and a surface protective layer 5 containing, for example, an acrylic resin composition as a main component are laminated on the surface of the design layer 3 opposite to the colored thermoplastic resin layer 2. After the transparent thermoplastic resin layer 4 is laminated by, for example, extrusion lamination, the surface protective layer 5 is laminated.

[0054] As a result, the design layer 3, the transparent thermoplastic resin layer 4, and the surface protection layer 5 are laminated in this order on one surface of the colored thermoplastic resin layer 2 (FIG. 2(d)). In addition, when providing an uneven shape in the non-mirror region 5b, an extrusion lamination and simultaneous embossing method may be used when laminating the transparent thermoplastic resin layer 4, in which lamination and embossing are performed simultaneously, and the transparent thermoplastic resin layer 4 may be embossed with a matte finish or the like.

[0055] In addition, an adhesive layer may be provided between the pattern layer 3 and the transparent thermoplastic resin layer 4, and the adhesive layer may be a urethane-based adhesive applied to the pattern layer 3 and an adhesive resin laminated to the urethane-based adhesive.

[0056] Next, the entire laminate in which these layers are stacked, as shown in Figure 2(d), is irradiated with infrared rays from the surface protection layer 5 side (Figure 2(e)), and immediately after this irradiation, a roll with a mirror plate attached is pressed against the surface of the surface protection layer 5 (Figure 2(f)). As a result, in a plan view, the areas of the surface protection layer 5 that overlap with the matte gloss developing pattern section 6 have their unevenness smoothed out to form a mirror-like surface, forming mirror area 5a, and the areas not overlapping with the matte gloss developing pattern section 6 remain uneven, becoming non-mirror area 5b, and the decorative sheet 1 is formed.

[0057] That is, the matte gloss pattern portion 6 is formed with black ink having infrared absorption properties. Furthermore, the matte gloss pattern portion 6 is made of a material with significantly lower infrared transmittance than the other layers. Therefore, compared to the infrared transmittance of the area where the matte gloss pattern portion 6 is formed in a planar view, the infrared transmittance of the area where the matte gloss pattern portion 6 is not formed is higher, resulting in a difference in infrared transmittance in the laminate shown in FIG. 2(d) in a planar view. Therefore, when the laminate is irradiated with infrared rays, the transparent thermoplastic resin layer 4 and the surface protective layer 5 are more likely to soften in the area of ​​the surface protective layer 5 that overlaps with the matte gloss pattern portion 6 in a planar view, i.e., the area with high infrared absorptivity, compared to the area not overlapping with the matte gloss pattern portion 6. That is, after infrared irradiation, the transparent thermoplastic resin layer 4 and the surface protective layer 5 have areas that are more likely to soften and areas that are less likely to soften. Therefore, when a mirror-finish plate is pressed onto the surface protective layer 5 in this state, the softened areas are more likely to form a mirror finish, while the less-softened areas are less likely to form a mirror finish. That is, a mirror surface 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 matte gloss developing pattern portion 6 in a planar view. As a result, a mirror surface region 5a that is in harmony with the matte gloss developing pattern portion 6 is likely to be formed only in the positions that overlap with the matte gloss developing pattern portion 6 of the surface protective layer 5 in a planar view.

[0058] This allows the mirror region 5a to be formed at a position synchronized with the picture layer 3, i.e., the mirror region 5a synchronized with the picture layer 3 can be easily created without high-precision positioning operations. The presence of the mirror region 5a and the non-mirror region 5b in the surface protective layer 5 results in a gloss matte finish. Furthermore, if the transparent thermoplastic resin layer 4 is embossed using the extrusion lamination and simultaneous embossing method when laminating the transparent thermoplastic resin layer 4, the mirror region 5a, which is a mirror surface, and the embossed non-mirror region 5b are formed, resulting in a gloss matte finish with a more aesthetically pleasing design.

[0059] It is considered that the heat energy retained by the gloss matte developing pattern portion 6 upon 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 gloss matte developing pattern portion 6 is formed or not. Furthermore, the heat energy retained by each layer upon infrared irradiation is minute compared to the energy absorbed in the gloss matte developing pattern portion 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 the gloss matte can be considered to be developed by the relative difference between the heat energy retained by the area where the gloss matte developing pattern portion 6 is formed and the heat energy retained by the area where the gloss matte developing pattern portion 6 is not formed.

[0060] The timing for pressing the mirror-finish plate onto the surface protection layer 5 after infrared irradiation is not limited to immediately after infrared irradiation, but may be any timing that allows pressing the plate onto the surface of the surface protection layer 5 to selectively form a mirror-finish shape in the portion softened by infrared irradiation. In addition, other processes may be included between the process of forming the surface protection layer 5 and the process of performing infrared irradiation, as long as the infrared irradiation is performed while the surface protection layer 5 is formed.

[0061] [Effects of this embodiment] (1) The decorative sheet 1 according to this embodiment provides a glossy matte appearance by providing specular regions 5a and non-specular regions 5b, thereby preventing the pattern from coming off in the glossy matte. In other words, for example, when a glossy matte design is achieved by providing a gloss-adjusting layer, the gloss-adjusting layer may peel off due to wear, potentially reducing the glossy matte design. In contrast, the glossy matte appearance is achieved by providing specular regions 5a and non-specular regions 5b, thereby improving the surface strength of the decorative sheet 1. Furthermore, because the surface strength can be improved in this way, the decorative sheet can also be used as a decorative sheet for flooring, for example.

[0062] Furthermore, because the pattern portion 6 for developing a matte gloss effect is provided in harmony with the pattern of the pattern layer 3, it is possible to form a mirror area 5a that is in harmony with the pattern of the pattern layer 3, and it is possible to easily develop a matte gloss effect that is in harmony with the pattern. Furthermore, because the pattern portion 6 for developing a matte gloss effect is provided on the surface opposite the pattern layer 3, even if the pattern portion 6 for developing a matte gloss effect contains, for example, black ink, it is possible to suppress the influence of the color of the pattern portion 6 for developing a matte gloss effect on the surface side of the decorative sheet 1, which means that a synchronized matte gloss effect can be achieved with a light color.

[0063] (2) Furthermore, since the difference in gloss value between the specular region 5a and the non-specular region 5b of the surface protection layer 5 is greater than "3", it is possible to fully achieve a gloss matte design. (3) Furthermore, by forming an uneven shape in the non-specular area 5b, the gloss matte design can be further improved.

[0064] (4) According to the manufacturing method of the decorative sheet 1 of this embodiment, by irradiating a laminate in which each layer is stacked with infrared rays and then stamping a mirror plate onto the surface protective layer, it is possible to form the mirror area 5a only in the portion of the surface protective layer 5 that overlaps with the gloss matte-exhibiting pattern portion 6. In other words, the mirror area 5a can be easily formed in the desired position without having to perform highly accurate positioning for forming the mirror area 5a. As a result, a decorative sheet 1 with excellent design properties can be easily formed.

[0065] [Modification] (1) In the above embodiment, a material containing black ink is used as the matte gloss pattern portion 6, and infrared radiation is applied to partially soften the transparent thermoplastic resin layer 4 and the surface protective layer 5. However, the present invention is not limited to this. The matte gloss pattern portion 6 may be made of a material containing ITO (tin-doped indium oxide) or ATO (antimony-doped tin oxide), which is made of a component that is more light-absorbent for light of a predetermined wavelength than light of other wavelengths and is more light-absorbent than the colored thermoplastic resin layer 2. The transparent thermoplastic resin layer 4 and the surface protective layer 5 may be partially softened by using a light source that irradiates light of a predetermined wavelength.

[0066] (2) In the above embodiment, a case where an uneven shape is formed in the non-mirror region 5b has been described, but an uneven shape need not be formed. In other words, when the surface protection layer 5 is laminated on the transparent thermoplastic resin layer 4, the surface of the surface protection layer 5 is not a mirror surface but is uneven. Therefore, when a mirror-finish plate is pressed, the mirror region 5a becomes a mirror surface, but the non-mirror region 5b is difficult to soften and therefore remains uneven. As a result, a difference in gloss occurs between the mirror region 5a and the non-mirror region 5b, so a gloss-matte effect can be achieved in this case as well.

[0067] (3) In the above embodiment, the pattern layer 3 is laminated on one surface of the colored thermoplastic resin layer 2, then the matt gloss-producing pattern portion 6 and the primer layer 7 are formed on the other surface of the colored thermoplastic resin layer 2, and then the transparent thermoplastic resin layer 4 and the surface protective layer 5 are formed on the surface of the pattern layer 3 opposite the colored thermoplastic resin layer 2, but this is not limited to this. For example, the pattern layer 3, the transparent thermoplastic resin layer 4, and the surface protective layer 5 may be formed in this order on one surface of the colored thermoplastic resin layer 2, and then the matt gloss-producing pattern portion 6 and the primer layer 7 may be formed in this order on the other surface.

[0068] (4) Furthermore, as shown in Fig. 3, the decorative sheet 1 according to the above embodiment may be attached to a substrate 9 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 substrate 9, or may be provided on both sides.

[0069] [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.

[0070] 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.

[0071] As described above, the decorative sheet 1 has a primer layer 7, which ensures adhesion to the substrate 9, thereby preventing peeling of the decorative member 10 between the decorative sheet 1 side and the substrate 9 side. Furthermore, when the mirror surface region 5a is formed, the surface strength of the decorative sheet 1 is improved by applying heat, so by using this decorative sheet 1, it is possible to obtain a decorative member 10 that has good bending suitability while ensuring surface strength. In other words, by using a decorative sheet 1 that has a high gloss matte design, it is possible to easily obtain a decorative member 10 that has a high gloss matte design. [Example]

[0072] The present invention will be described in detail below with reference to examples, but the present invention is not limited to the following examples. (Preparation of decorative sheets of examples) The decorative sheets of the examples were produced in the same manner except that the pattern portion 6 for developing gloss matte was different. Specifically, a colored film made of a 50 μm thick PBT layer was used as the colored thermoplastic resin layer 2, and a pattern layer 3 was formed on one side of the colored thermoplastic resin layer 2 by printing with a urethane-based printing ink.

[0073] Next, a black ink made of a urethane ink was solid printed on the other surface of the colored thermoplastic resin layer 2 to form a matte gloss pattern portion 6. The printing method for the matte gloss pattern portion 6 will be described later.

[0074] Next, a urethane adhesive was applied onto the pattern layer 3a. Next, the adhesive resin and PP resin that would become the transparent thermoplastic resin layer 4 were laminated by co-extrusion lamination and simultaneous embossing, and a matte finish was embossed. As a result, an 80 μm-thick transparent thermoplastic resin layer 4 was laminated on top of the design layer 3a, and a matte finish was formed on the surface of the transparent thermoplastic resin layer 4 opposite the design layer 3a. Next, a resin containing an acrylic resin composition as its main component was applied onto the transparent thermoplastic resin layer 4, and a surface protective layer 5 was laminated on top of the transparent thermoplastic resin layer 4.

[0075] Next, a pattern portion 6 for expressing gloss and matte was formed on one surface of the colored thermoplastic resin layer 2, and a picture layer 3, a transparent thermoplastic resin layer 4, and a surface protective layer 5 were formed on the other surface of the colored thermoplastic resin layer 2. A post-embossing process was then carried out on the laminate to obtain a decorative sheet. Specifically, this laminate was heated with an infrared heater, and then a mirror plate was pressed against the surface protective layer 5 to form a mirror area 5a, thereby obtaining the decorative sheet of the example.

[0076] The matte gloss pattern portion 6 was formed by solid printing with black ink using printing plates with varying image density levels, to create multiple decorative sheets with matte gloss pattern portions 6 having different image density levels. The image density levels were 0%, 20%, 40%, 60%, 70%, 80%, and 90%. Note that the image density level here refers to the dot area ratio (the proportion of the area occupied by dots in the image expressed as a percentage).

[0077] A decorative sheet with an image density level of 20% to 90% corresponds to the mirror area 5a of the decorative sheet, and a decorative sheet with an image density level of 0% corresponds to the non-mirror area 5b of the decorative sheet. Also, a decorative sheet with an image density level of 0% corresponds to a decorative sheet that does not have a pattern portion 6 for developing gloss matte.

[0078] (evaluation) The decorative sheets of the examples having different levels of image density were evaluated for the following effect items that affect the appearance of the gloss and matte appearance.

[0079] [Glossiness] For each decorative sheet of the examples with different image density levels (image density levels of 0% to 90%), specular gloss was measured at an incident angle of 60° using micro-TRI-gloss manufactured by BYK Corporation to obtain the gloss. [Gloss difference] Based on the glossiness of each decorative sheet, the difference between the glossiness of each decorative sheet and the glossiness of a decorative sheet with an image density level of 0% was calculated as the glossiness difference for each decorative sheet with an image density level of 20% to 90%. [Surface roughness] For each of the decorative sheets of the examples with different image density levels (image density levels of 0% to 90%), the arithmetic mean height (Sa) and maximum height (Sz) were measured as indicators of surface roughness.

[0080] Specifically, a surface observation image (650 μm × 650 μm) was obtained using an Olympus laser microscope (LEXT OLS4100), which complies with ISO 25178. The arithmetic mean height (Sa) and maximum height (Sz) of the surface at the specified observation location were then measured in accordance with ISO 25178. The observation magnification was 200x (objective lens: 20x), the observation mode was set to "high precision," and the cutoff values ​​were λc = 800.00 μm and λs = 0. During the measurement, tilt correction was performed using three points randomly selected from within the observed area.

[0081] [Difference in surface roughness] Based on the surface roughness of each decorative sheet, the difference between the arithmetic mean height (Sa) of each decorative sheet with an image density level of 20% to 90% and the arithmetic mean height (Sa) of a decorative sheet with an image density level of 0% was calculated as the arithmetic mean height difference ΔGM(Sa). Similarly, the difference between the maximum height (Sz) of each decorative sheet and the maximum height (Sz) of a decorative sheet with an image density level of 0% was calculated as the maximum height difference ΔGM(Sz).

[0082] [GM Design (Sensory Evaluation)] The degree of gloss matte development was visually observed, and the GM design was evaluated based on the degree of gloss matte development and the gloss difference.

[0083] The evaluation criteria are as follows: ◎: The gloss difference is greater than "6", and a stable gloss matte is achieved even when variations in production are taken into account. ◯: The gloss difference is greater than "3", and gloss and matte can be confirmed. ×: The gloss matte expression is not visible. The evaluation and measurement results are shown in Table 1.

[0084] [Table 1]

[0085] In Table 1, the glossiness of a decorative sheet with an image density level of 20% to 90% corresponds to the glossiness of the mirror-finished areas 5a in a decorative sheet having mirror-finished areas 5a and non-mirror-finished areas 5b, and the glossiness of a decorative sheet with an image density level of 0% corresponds to the glossiness of the non-mirror-finished areas 5b. Therefore, the glossiness difference indicates the glossiness difference between the mirror-finished areas 5a and the non-mirror-finished areas 5b in a decorative sheet having mirror-finished areas 5a and non-mirror-finished areas 5b.

[0086] Similarly, the arithmetic mean height (Sa) and maximum height (Sz) of a decorative sheet having an image density level of 20% to 90% correspond to the arithmetic mean height (Sa) and maximum height (Sz) of the mirrored areas 5a in a decorative sheet having mirrored areas 5a and non-mirrored areas 5b, and the arithmetic mean height (Sa) and maximum height (Sz) of a decorative sheet having an image density level of 0% correspond to the arithmetic mean height (Sa) and maximum height (Sz) of the non-mirrored areas 5b. Therefore, the arithmetic mean height difference ΔGM(Sa) and maximum height difference ΔGM(Sz) of the non-mirrored areas 5b indicate the arithmetic mean height difference ΔGM(Sa) and maximum height difference ΔGM(Sz) between the mirrored areas 5a and non-mirrored areas 5b in a decorative sheet having mirrored areas 5a and non-mirrored areas 5b.

[0087] As shown in Table 1, decorative sheets with image density levels of 20% to 90% have higher gloss and smaller arithmetic mean height and maximum height than decorative sheets with an image density level of 0%. In other words, it was confirmed that the provision of a pattern portion for producing a matte gloss makes it easier to perform mirror finishing using a mirror plate, and that a gloss level of 12 or higher can be obtained. It was also confirmed that the higher the image density level, the easier it is to perform mirror finishing, and the higher the gloss level of the mirror surface. It was also confirmed that a matte gloss can be produced if the gloss difference between a decorative sheet with an image density level of 0% and a decorative sheet with an image density level of 20% to 90% is 3 or more, i.e., if the gloss difference between the mirror area 5a and the non-mirror area 5b is 3 or more. Similarly, it was confirmed that gloss matte is exhibited when the difference in arithmetic mean height ΔGM(Sa), i.e., the difference in arithmetic mean height between the mirror-finished area 5a and the non-mirror-finished area 5b, is "0.6" or more, and the difference in maximum height between the mirror-finished area 5a and the non-mirror-finished area 5b (ΔGM(Sz)) is "3" or more.

[0088] It was also confirmed that the surface shape of the surface protective layer differs depending on the image density level when the mirror-finish plate is pressed, the light scattering property changes due to differences in surface roughness, and the gloss value of the surface protective layer differs depending on the image density level. Therefore, it was confirmed that the matte gloss can be expressed by the difference in surface roughness between the part with the matte gloss expression pattern and the part without it. Furthermore, it was confirmed that a sufficient gloss and matte design could be obtained in actual sensory evaluation.

[0089] The present invention can have the following configurations, for example. (1) 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 matte gloss pattern portion is arranged on the other surface of the colored resin layer in synchronization with the pattern of the pattern layer, and is made of a predetermined material that has higher light absorption for light of a predetermined wavelength than light of other wavelengths and has higher light absorption for light of the predetermined wavelength than the colored resin layer. Equipped with A decorative sheet characterized in that the surface protective layer has a mirror surface area at a position that overlaps the portion where the predetermined material is arranged in a plan view. (2) The decorative sheet according to (1) above, wherein a concave-convex shape is formed in the non-mirror area of ​​the surface protective layer, which is the area excluding the mirror area. (3) The decorative sheet according to (1) or (2) above, characterized in that the gloss difference between the mirror-finished area of ​​the surface protective layer and the non-mirror-finished area excluding the mirror-finished area is 3 or more. (4) The decorative sheet according to any one of (1) to (3) above, wherein the glossiness of the specular area is 12 or more. (5) The decorative sheet according to any one of (1) to (4) above, wherein the predetermined material includes black ink containing carbon black. (6) A substrate; and a decorative sheet according to any one of (1) to (5) above, provided on at least one surface of the substrate, 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. (7) a step of laminating a colored resin layer, a pattern layer, a transparent resin layer, and a surface protective layer in this order; A process of forming a pattern portion for expressing gloss matte at a position synchronized with the pattern of the pattern layer on the other surface of the colored resin layer using a predetermined material having the property of absorbing light of a predetermined wavelength more than light of other wavelengths and more than the colored resin layer; After the laminating step and the step of forming the gloss matte pattern portion, a step of irradiating light of a wavelength in which the power of light of the predetermined wavelength is greater than the power of light of other wavelengths; A method for manufacturing a decorative sheet, characterized by comprising, after the light irradiation step, a step of performing mirror finishing on the surface protective layer to make the surface of the surface protective layer a mirror surface, thereby forming a mirror area. (8) The method for producing a decorative sheet according to (7) above, wherein the mirror finish is a step of pressing a mirror plate having a mirror surface onto the surface protective layer. [Explanation of symbols]

[0090] 1 decorative sheet 2 Colored thermoplastic resin layer 3. Picture layer 4 Transparent thermoplastic resin layer 5 Surface protective layer 5a Mirror area 5b Non-specular region 6 Gloss Matte Pattern 7 Primer layer 9 Base material 10 Decorative materials

Claims

1. 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 matte gloss pattern portion is arranged on the other surface of the colored resin layer in synchronization with the pattern of the pattern layer, and is made of a predetermined material that has higher light absorption for light of a predetermined wavelength than light of other wavelengths and has higher light absorption for light of the predetermined wavelength than the colored resin layer. Equipped with A decorative sheet characterized in that the surface protective layer has a mirror surface area at a position that overlaps the portion where the predetermined material is arranged in a plan view.

2. 2. The decorative sheet according to claim 1, wherein a concave-convex shape is formed in a non-mirror area of ​​said surface protective layer excluding said mirror area.

3. 3. The decorative sheet according to claim 1, wherein the difference in gloss between the specular region and the non-specular region of the surface protective layer is 3 or more.

4. 3. The decorative sheet according to claim 1, wherein the glossiness of the specular area is 12 or more.

5. 3. The decorative sheet according to claim 1, wherein the predetermined material includes black ink containing carbon black.

6. A substrate; The decorative sheet according to claim 1 or 2 is provided on at least one surface of the substrate, 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.

7. a step of laminating a colored resin layer, a pattern layer, a transparent resin layer, and a surface protective layer in this order; A process of forming a pattern portion for expressing gloss matte at a position synchronized with the pattern of the pattern layer on the other surface of the colored resin layer using a predetermined material having the property of absorbing light of a predetermined wavelength more than light of other wavelengths and more than the colored resin layer; After the laminating step and the step of forming the gloss matte pattern portion, a step of irradiating light of a wavelength in which the power of light of the predetermined wavelength is greater than the power of light of other wavelengths; A method for manufacturing a decorative sheet, characterized by comprising, after the light irradiation step, a step of performing mirror finishing on the surface protective layer to make the surface of the surface protective layer a mirror surface, thereby forming a mirror area.

8. 8. The method for producing a decorative sheet according to claim 7, wherein the mirror finish is a step of pressing a mirror plate having a mirror surface onto the surface protective layer.

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