JP7658153B2 - Decorative sheets and decorative materials - Google Patents

Description

The present invention relates to a resin decorative sheet and decorative material. In particular, it is a technology related to decorative sheets and decorative materials with excellent design that can be attached to wood-based substrates and used for building materials, flooring materials, and the surrounding areas.

Decorative sheets have been developed and expanded in the process of the development of residential construction as an industry. Originally, houses were built using materials suited to the characteristics of the region, such as wood and stone, but as the housing industry developed, industrialization progressed, and natural materials were replaced by artificial materials. In recent years, the heavy use of high-quality wood and stone materials has been feared to lead to deforestation and environmental problems, which has become one of the factors expanding the demand for decorative sheets. For example, decorative materials in which decorative sheets are bonded to wood substrates such as plywood, MDF (medium density fiberboard), and particle board, resin substrates, inorganic non-combustible substrates, metal substrates, etc., are widely used (see, for example, Patent Document 1).
Furthermore, the design of decorative sheets is often designed to imitate the surfaces of materials such as wood and stone.

Patent No. 5045180

However, compared to real wood or stone, decorative sheets tend to have a flat surface texture. Real wood and stone have different textures due to differences in the surface material and structure, and there are differences in the unevenness from place to place. Areas with different textures often also have different colors, but decorative sheets do not express this, and in terms of design, the expensive real thing is far superior.
The present invention has been made in consideration of the above-mentioned points, and has an object to provide a decorative sheet and a decorative material that have a texture closer to the real thing and have excellent design properties.

In order to solve the above problems, one embodiment of the decorative sheet of the present invention is (a) a decorative sheet in which a design layer, a transparent resin layer, and a surface protective layer are laminated in this order, (b) the design layer includes light-colored portions and dark-colored portions that are darker in color than the light-colored portions, (c) the surface protective layer includes high-gloss portions and low-gloss portions that have a lower gloss than the high-gloss portions, and (d) the dark-colored portions and the low-gloss portions overlap so that they blend in with each other when viewed from the surface protective layer side.
A decorative material that is one aspect of the present invention comprises (a) the decorative sheet described above, and (b) a substrate bonded to the decorative sheet.

According to one aspect of the present invention, it is possible to provide decorative sheets and decorative materials that have a texture similar to the surface texture of wood, stone, and other building materials and have excellent design properties.

1 is a schematic diagram showing a cross-sectional configuration of a decorative sheet according to an embodiment. FIG.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
In this embodiment, a decorative sheet and a decorative material for floors or fittings will be described as an example, but the decorative sheet and the decorative material may be used for other parts.
Here, the drawings are schematic, and the relationship between thickness and planar dimensions, the thickness ratio of each layer, etc. are different from the actual ones. Furthermore, the embodiments shown below are examples of configurations for embodying the technical idea of the present invention, and the technical idea of the present invention is not limited to the materials, shapes, structures, etc. of the components described below. The technical idea of the present invention can be modified in various ways within the technical scope defined by the claims.

As shown in FIG. 1, the decorative sheet 1 of this embodiment is formed by laminating a pattern layer 2, a transparent resin layer 3, and a surface protection layer 4 in this order. FIG. 1 illustrates an example in which a base sheet 5 is disposed on the surface of the pattern layer 2 opposite to the surface on which the transparent resin layer 3 is disposed. The decorative sheet 1 is bonded to a base material 6 to form the decorative material 7 of this embodiment.

[Substrate]
The substrate 6 may be made of, for example, tropical plywood, particle board, medium density fiberboard (MDF), ordinary plywood as specified by the Japanese Agricultural Standards, or wood powder-added olefin resin. It may also be made of, for example, metal such as aluminum, resin such as plastic, or a composite material of these. The thickness of the substrate 6 is preferably 3 mm or more and 25 mm or less.

[Base sheet]
As the base sheet 5, for example, paper and plastic film can be used. Examples include coated paper and thermoplastic resin film. Examples of thermoplastic resins 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, methacrylic acid ester, etc. In particular, polyolefin resins are preferred in consideration of environmental compatibility, processability, and price. In addition, the grade and composition of the resin can be selected in consideration of the ease of sheeting, printability, and suitability for bending, in addition to environmental compatibility, processability, and price.

When coloring the base sheet 5, the hue can be appropriately selected so as to conceal the base material 6 to which the decorative sheet 1 is attached and to become the base color of the pattern layer 2. For example, a method of coloring the base sheet 5 can be used in which a coloring agent such as a pigment is mixed and kneaded into the thermoplastic resin when sheeting it. In addition, a method can be used in which a colored layer is provided under the pattern layer 2 as a solid ink layer using a coating or printing technique before providing the pattern layer 2.

[Pattern layer]
The pattern layer 2 is a printing layer on which a pattern is printed in order to impart design to the decorative sheet 1 or the decorative material 7. A known printing method can be adopted as a method for forming the pattern layer 2. The printing method is not particularly limited, but gravure printing is preferable in consideration of productivity and the quality of the pattern. For example, when the base sheet 5 can be prepared in a rolled state, printing for forming the pattern layer 2 can be performed using a roll-to-roll printing device. In addition to these, other printing methods include, for example, offset printing, screen printing, flexographic printing, electrostatic printing, inkjet printing, and transfer printing from a transfer sheet. When using such a printing method, the pattern of the pattern layer 2 can be formed by multi-color printing using normal process colors of yellow, red, blue, and black, as well as by multi-color printing using special colors performed by preparing plates of each color that constitutes the pattern.

The pattern of the pattern layer 2 may be any pattern, taking into consideration the design of the flooring material or fittings. For example, the pattern may be marble grain, imagining a stone floor such as marble. For example, in the case of a wood-based pattern, various wood grains and cork may be used as the pattern. In addition to the pattern of natural materials, artificial patterns such as artificial patterns and geometric patterns based on these motifs may also be used. Other than these, examples of pattern patterns include wood grain patterns composed of spring wood regions and autumn wood regions of the cross section of tree rings, vessel parts, etc., leather (skin grain) patterns, stone grain patterns on the surface of stone materials such as marble, granite, and sandstone, sand grain patterns, tile patterns, brick masonry patterns, cloth patterns, geometric figures, letters, symbols, abstract patterns, floral patterns, landscapes, characters, etc.

The pattern has a variety of shades of color. That is, the pattern layer 2 includes light-colored portions 2a and dark-colored portions 2b that are darker than the light-colored portions 2a. In FIG. 1, the pattern layer 2 is illustrated as having light-colored portions 2a and dark-colored portions 2b arranged alternately in a direction perpendicular to the thickness direction (left-right direction in FIG. 1) in a cross section (cross section shown in FIG. 1) of the decorative sheet 1 in the thickness direction. For example, when the pattern is wood grain, the duct portion becomes the dark-colored portion 2b. In addition, in the CIE1976 L*a*b* color space, it is preferable that the color difference ΔE between the light-colored portions 2a and the dark-colored portions 2b is 5 or more. By making the color difference ΔE 5 or more, the pattern of the pattern layer 2 can be made clearer, and the design of the decorative sheet 1 can be further improved. In addition, it is more preferable that the color difference ΔE is 7 or more. The CIE 1976 L*a*b* color space is defined in JIS Z8781-4. ΔE is measured using a color difference meter (e.g., X-Rite eXact).

Printing ink is a mixture of a solvent and solids such as a colorant and a binder resin.
Examples of the solvent 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 solvent may be used alone or in combination of two or more.

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, polypropylene chloride, and chlorinated polypropylene. Here, (meth)acrylic means acrylic or methacrylic. The binder resin may be one type alone or two or more types in combination.

Examples of the colorant 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 colorant may be used alone or in combination of two or more kinds.
Here, the solvent contained in the printing ink will eventually evaporate, so the design layer 2 is formed mainly from solid components such as colorants and binder resins.

The printing ink may also contain other components such as stabilizers, plasticizers, catalysts, and curing agents. The printing ink may be selected according to the printing method. In particular, it is preferable to select the ink taking into consideration its adhesion to the base sheet 5, its printability, and its weather resistance as a flooring material or fitting. The thickness of the pattern layer 2 can be appropriately adjusted taking into consideration the decorativeness required of the pattern layer 2, the three-dimensional formability of the decorative sheet 1, and the like. The thickness of the pattern layer 2 is usually 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.

If necessary, a uniformly colored concealing layer (solid print layer) may be formed on the surface of the pattern layer 2 facing the base sheet 5. The concealing layer is a layer that can impart an intended color to even out the surface color when the base sheet 5 is colored or has color unevenness. The concealing layer is, for example, a colored solid layer. The colored solid layer is, for example, a solid layer of an opaque color. The concealing layer contains a binder resin and a colorant dispersed in the binder resin. The binder resin and colorant can be appropriately selected and used from the same materials as those used for the pattern layer 2.

The concealing layer is, for example, a printing layer. The printing method can be selected from the same method as that for the pattern layer 2. Also, known coating methods such as gravure coating, roll coating, and spray coating can be used. The ink composition for the concealing layer (coating liquid) used to form the concealing layer is, for example, a mixture of a solvent and solids such as a colorant and a binder resin. The ink composition for the concealing layer may contain a stabilizer, a plasticizer, a catalyst, a hardener, etc. as other components. The solvent, colorant, and binder resin can be selected from the same solvents, colorants, and binder resins as those used in the printing ink for the pattern layer 2. In addition, when embossing is applied to the surface protective layer 4, it is preferable to print the color of the colorant in a color associated with the emboss (for example, brown in the case of a wood grain pattern), and the design of the flooring material or building material is further improved by associating it with the emboss. Since the solvent eventually evaporates, the concealing layer is mainly formed from solids such as a colorant and a binder resin. The thickness of the concealing layer can be adjusted appropriately taking into consideration the concealing properties and three-dimensional moldability required of the concealing layer. The thickness of the concealing layer is usually 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.

In addition, an adhesive layer (not shown) may be provided on both or one side of the pattern layer 2 in order to improve adhesion between the pattern layer 2 and the transparent resin layer 3, and between the pattern layer 2 and the base sheet 5. By strengthening these bonds, the decorative sheet 1 can be given bending processability to follow curved surfaces and right-angled surfaces. There are no particular limitations on the resin used in the adhesive layer (not shown). For example, a two-component curing urethane resin can be used. For example, a coating device or a gravure printing device can be used to apply the resin used in the adhesive layer (not shown).

In addition, a glittering layer (not shown) may be provided between the pattern layer 2 and the transparent resin layer 3 in order to provide a suitable design effect such as a sense of depth and brightness to the decorative sheet. The glittering layer (not shown) preferably contains a glittering pigment and a binder resin. Examples of the glittering pigment include pearl pigments and metal pigments. In particular, pearl pigments are preferred because they can prevent the light transmittance of the glittering layer from decreasing, and therefore do not impair the visibility of the pattern layer 2.

Pearl pigments are pigments that can impart pearlescent luster. For example, the surface of the base particle is coated with a metal oxide. As the base particle, scaly particles such as mica are preferable. As the metal oxide, oxides of metals such as titanium, iron, zirconium, silicon, aluminum, and cerium can be mentioned. The metal oxide may be one type alone or two or more types. 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; scale-like foil pieces such as basic lead carbonate, lead hydrogen arsenate, and bismuth oxide chloride; fish scale powder, shell pieces, and pearl pieces.

Examples of the metallic pigment 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 kinds.
From the viewpoint of providing an excellent design effect, for example, when the glittering layer is formed by gravure printing, the average particle size 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 size 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, the "average particle size" is a value that can be determined as the mass average value D50 in particle size distribution measurement by laser light diffraction method.

Examples of binder resins include thermoplastic resins and cured products of curable resin compositions, and from the viewpoint of durability, cured products of curable resin compositions are preferred. 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, cured products of thermosetting resin compositions are preferred.

Examples of thermosetting resin compositions used in the photoluminescent 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 necessary. The ionizing radiation curing resin composition used in the photoluminescent layer can be the same as the ionizing radiation curing resin composition of the surface protective layer 4 described below.

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 making the content of the glittering pigment 10 parts by mass or more, it is possible to impart a sufficient glossy feel, and by making it 90 parts by mass or less, it is possible to prevent the visibility of the pattern layer described below from being impaired. 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.

The glittering layer can be formed into any pattern depending on the design to be imparted. For example, wood grain, leather, stone, sand, tile, brickwork, fabric, geometric figures, letters, symbols, abstract patterns, floral patterns, landscapes, characters, etc. are included. In addition, it is preferable that the arbitrary pattern has shading in order to further enhance the design effect. The shading may be formed by the size or thickness of the halftone dots, but it is preferable to form it by 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).
The glittering layer can be formed, for example, by applying a coating liquid containing a glittering pigment and a binder resin by a general-purpose printing method such as gravure printing. When the shading of the glittering layer is formed by varying the density of halftone dots, the halftone dots of the printing plate can be formed by an FM (frequency modulation) screen.

[Transparent resin layer]
The transparent resin layer 3 is a resin layer for providing thickness and depth for design purposes, and for protecting the pattern layer 2 and imparting good surface properties so as to improve the weather resistance and abrasion resistance of the decorative sheet 1. Examples of materials that can be used for the transparent resin layer 3 include vinyl chloride resin, acrylic resin, and polyolefin resin (polypropylene resin, polyethylene resin). In particular, polyolefin resin is preferred in consideration of environmental compatibility, processability, and price. In addition to environmental compatibility, processability, and price, the grade and composition of the resin can be selected in consideration of ease of sheeting, printability, and suitability for bending. As for suitability for bending, it is important to select the material in consideration of the absence of whitening or cracking at the bent portion.
As a method for forming the transparent resin layer 3, for example, when the transparent resin layer 3 and an adhesive layer (not shown) are formed simultaneously, a method in which both are extruded simultaneously by co-extrusion can be used.

[Surface protection layer]
The surface protective layer 4 is a layer for imparting surface properties such as abrasion resistance to the decorative sheet 1. The surface protective layer 4 is also a layer for adjusting the surface gloss of the decorative sheet 1. The surface protective layer 4 may be a single layer or a multilayer. For example, the surface protective layer 4 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 resin layer 3. When providing the surface protective layer 4 consisting of the first surface protective layer (not shown) and the second surface protective layer (not shown), each layer may be applied and the coating film may be cured using a known coating device, heat drying device, or ionizing radiation irradiation device according to the type of curable resin.

The surface protective layer 4 is mainly composed of a curable resin. In other words, it is preferable that the resin component of the surface protective layer 4 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 4 may contain weathering agents, plasticizers, stabilizers, fillers, dispersants, colorants such as dyes and pigments, solvents, etc., as necessary.
The surface of the surface protection layer 4 may have an uneven pattern formed thereon to impart a given design. Examples of the uneven pattern include the duct grooves of a wood grain board, the uneven surface of a stone board (such as the cleavage surface of granite), the texture of a cloth surface, the matte finish, the sand grain, the hairline, and the linear grooves. In addition, the uneven pattern can be formed, for example, by embossing. The method of embossing is not particularly limited. For example, a known sheet-fed embossing machine or a rotary embossing machine can be used.

The surface of the surface protective layer 4 has high and low gloss. That is, the surface protective layer 4 includes a high gloss portion 4a and a low gloss portion 4b having a lower gloss than the high gloss portion 4a. In FIG. 1, the surface protective layer 4 is illustrated as having the high gloss portion 4a and the low gloss portion 4b arranged alternately in a direction perpendicular to the thickness direction (left and right direction in FIG. 1) in a cross section in the thickness direction of the decorative sheet 1 (cross section shown in FIG. 1). In addition, the low gloss portion 4b overlaps with the dark color portion 2b so that the dark color portion 2b and the low gloss portion 4b are in harmony when viewed from the surface protective layer 4 side. As the planar pattern of the low gloss portion 4b, for example, a pattern identical to the planar pattern of the dark color portion 2b, a pattern one size smaller than the planar pattern of the dark color portion 2b, or a pattern one size larger than the planar pattern of the dark color portion 2b can be adopted. In addition, the degree of overlap between the low gloss portion 4b and the dark color portion 2b is preferably such that, for example, the low gloss portion 4b overlaps 80% or more (more preferably 90% or more) of the 100% area of the dark color portion 2b.

In addition, it is preferable that the difference between the 85-degree specular gloss of the high gloss portion 4a and the 85-degree specular gloss of the low gloss portion 4b be 2% or more. By making the difference in 85-degree specular gloss 2% or more, the gloss difference of the surface protective layer 4 can be made more clear, and the design of the decorative sheet 1 can be further improved. In addition, it is preferable that the 85-degree specular gloss of the low gloss portion 4b is 8% or less. By making the 85-degree specular gloss 8% or less, the gloss of the low gloss portion 4b can be sufficiently low, the gloss difference of the surface protective layer 4 can be made more clear, and the design of the decorative sheet 1 can be further improved.

[Ionizing radiation curable resin]
As the material of the surface protective layer 4, for example, an ionizing radiation curable resin or a two-component curable urethane resin can be used. The ionizing radiation curable resin is not particularly limited. For example, a transparent resin mainly composed of a prepolymer (including oligomer) and/or a monomer containing a radical polymerizable double bond in the molecule that can undergo polymerization and crosslinking reaction by irradiation with ionizing radiation such as ultraviolet rays and electron beams can be used. These prepolymers or monomers can be used alone or in combination. Specifically, the prepolymers or monomers include compounds having radical polymerizable unsaturated groups such as (meth)acryloyl groups and (meth)acryloyloxy groups, cationic polymerizable functional groups such as epoxy groups, and the like in the molecule. In addition, polyene/thiol-based prepolymers obtained by combining polyene and polythiol are also preferred. Here, the (meth)acryloyl group means an acryloyl group or a methacryloyl group.

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 monomers having a radically polymerizable unsaturated group include monofunctional monomers such as methyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, phenoxyethyl (meth)acrylate, etc. Furthermore, examples of polyfunctional monomers 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, dipentaerythritol hexa(meth)acrylate, etc.

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-based vinyl ethers and aromatic vinyl ethers.
Examples of polyene-based prepolymers include those in which allyl alcohol is added to both ends of polyurethane made of diol and diisocyanate, and examples of thiol-based prepolymers include polythiols such as trimethylolpropane trithioglycolate and pentaerythritol tetrathioglycolate.

As the ionizing radiation, for example, electromagnetic waves or charged particles having energy capable of causing a curing reaction of molecules in the ionizing radiation curable resin (composition) can be used. Examples include ultraviolet light, electron beams, visible light, X-rays, and ion beams. As the curing reaction, for example, a crosslinking curing reaction can be used. As the ultraviolet light source, for example, a light source such as an ultra-high pressure mercury lamp, a high pressure mercury lamp, a low pressure mercury lamp, a carbon arc lamp, a black light, or a metal halide lamp can be used. As the wavelength of the ultraviolet light, for example, 190 nm or more and 380 nm or less can be preferably used. As the electron beam source, for example, an electron beam accelerator such as a Cockcroft-Walton type, a Van de Graff type, a resonant transformer type, an insulating core transformer type, a linear type, a dynamitron type, or a high frequency type can be used. In particular, it is preferable to use one that can irradiate electrons having an energy of 100 keV or more and 1000 keV or less (more preferably, electrons having an energy of 100 keV or more and 300 keV or less).

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

As explained above, in the decorative sheet 1 and decorative material 7 according to this embodiment, the dark colored portions 2b of the pattern layer 2 and the low gloss portions 4b of the surface protective layer 4 are configured to overlap so that the dark colored portions 2b and the low gloss portions 4b are in harmony when viewed from the surface protective layer 4 side. This allows the surface texture to be expressed more three-dimensionally, and also allows differences in color due to differences in the surface material, structure, etc. to be expressed. This makes it possible to provide a decorative sheet 1 and decorative material 7 that have a texture closer to the real thing and excellent design.

Examples and comparative examples of the decorative sheet 1 according to the embodiment of the present invention will be described below. Note that the present invention is not limited to the following examples.
Example 1
In Example 1, a decorative sheet 1 was produced in which the color difference ΔE between the light colored portions 2a and dark colored portions 2b of the pattern layer 2 was "3", the glossiness of the high gloss portions 4a of the surface protective layer 4 was "11%," the glossiness of the low gloss portions 4b was "10%," the glossiness difference was "1%, and there was overlap between the dark colored portions 2b and the low gloss portions 4b.
Example 2
In Example 2, a decorative sheet 1 was produced in which the color difference ΔE between the light colored portions 2a and dark colored portions 2b of the pattern layer 2 was "5", the glossiness of the high gloss portions 4a of the surface protective layer 4 was "11%," the glossiness of the low gloss portions 4b was "10%," the glossiness difference was "1%, and there was overlap between the dark colored portions 2b and the low gloss portions 4b.
Example 3
In Example 3, a decorative sheet 1 was produced in which the color difference ΔE between the light colored portions 2a and dark colored portions 2b of the pattern layer 2 was "7", the glossiness of the high gloss portions 4a of the surface protective layer 4 was "11%," the glossiness of the low gloss portions 4b was "10%," the glossiness difference was "1%, and there was overlap between the dark colored portions 2b and the low gloss portions 4b.
Example 4
In Example 4, a decorative sheet 1 was produced in which the color difference ΔE between the light colored portions 2a and dark colored portions 2b of the pattern layer 2 was "3", the glossiness of the high gloss portions 4a of the surface protective layer 4 was "12%," the glossiness of the low gloss portions 4b was "10%," the glossiness difference was "2%, and there was overlap between the dark colored portions 2b and the low gloss portions 4b.
(Example 5)
In Example 5, a decorative sheet 1 was produced in which the color difference ΔE between the light colored portions 2a and dark colored portions 2b of the pattern layer 2 was "3", the glossiness of the high gloss portions 4a of the surface protective layer 4 was "10%," the glossiness of the low gloss portions 4b was "8%," the glossiness difference was "2%, and there was overlap between the dark colored portions 2b and the low gloss portions 4b.

(Comparative Example 1)
In Comparative Example 1, a decorative sheet 1 was produced in which the difference in glossiness between the high-gloss portions 4a and low-gloss portions 4b of the surface protective layer 4 was 1%, but the pattern layer 2 had no dark color portions 2b (the color difference ΔE between the light-color portions 2a and dark color portions 2b of the pattern layer 2 was 0) and there was no overlap between the dark color portions 2b and the low-gloss portions 4b.
(Comparative Example 2)
In Comparative Example 2, a decorative sheet 1 was produced in which the color difference ΔE between the light colored portions 2a and the dark colored portions 2b of the pattern layer 2 was "3", but the surface protective layer 4 did not have low gloss portions 4b (the difference in glossiness between the high gloss portions 4a and the low gloss portions 4b was "0%), and there was no overlap between the dark colored portions 2b and the low gloss portions 4b.
(Comparative Example 3)
In Comparative Example 3, a decorative sheet 1 was produced in which the color difference ΔE between the light colored portions 2a and dark colored portions 2b of the pattern layer 2 was "3", and the difference in glossiness between the high gloss portions 4a and low gloss portions 4b of the surface protective layer 4 was "1%," but there was no overlap between the dark colored portions 2b and the low gloss portions 4b.

(Performance evaluation)
Design evaluation was performed on the decorative sheets 1 of Examples 1 to 5 and Comparative Examples 1 to 3. In the design evaluation, a sensory evaluation was performed by 10 people, and the number of people who felt that the design was close to the real design was rated.
◎: 9 or more people 〇: 8 people △: 6-7 people ×: 5 or less people

(Evaluation Results)
The evaluation results are shown in Table 1 below.

As shown in Table 1, the decorative sheets 1 of Examples 1 to 4 were evaluated as passing the design with "△", "○", and "◎". In particular, the decorative sheets 1 of Examples 2 and 3 were passed for design with "○" and "◎" because the color difference ΔE between the light colored portion 2a and the dark colored portion 2b in the CIE1976L*a*b* color space was 5 or more. Among these, the decorative sheet 1 of Example 5 was passed for design with "◎" because the color difference ΔE between the light colored portion 2a and the dark colored portion 2b in the CIE1976L*a*b* color space was 7 or more. Furthermore, the decorative sheets 1 of Examples 4 and 5 were passed for design with "○" and "◎" because the difference in 85-degree specular gloss between the high gloss portion 4a and the low gloss portion 4b was 2% or more. Among these, the decorative sheet 1 of Example 5 was passed for design with "◎" because the 85-degree specular gloss of the low gloss portion 4b was 8% or less.

On the other hand, in the decorative sheet 1 of Comparative Example 1, since there is no dark color portion 2b, the color difference ΔE between the light color portion 2a and the dark color portion 2b in the CIE1976L*a*b* color space is 0, and the design is evaluated as failing "x". In addition, in the decorative sheet 1 of Comparative Example 2, since there is no low gloss portion 4b, the difference in 85 degree specular gloss between the high gloss portion 4a and the low gloss portion 4b is 0%, and the design is evaluated as failing "x". In addition, in the decorative sheet 1 of Comparative Example 3, since there is no overlap between the dark color portion 2b and the low gloss portion 4b, the design is evaluated as failing "x".
Therefore, it was confirmed that the decorative sheets 1 of Examples 1-4 were superior in design to the decorative sheets 1 of Comparative Examples 1-3.

1...decorative sheet, 2...pattern layer, 2a...light colored portion, 2b...dark colored portion, 3...transparent resin layer, 4...surface protection layer, 4a...high gloss portion, 4b...low gloss portion, 5...base sheet, 6...base material, 7...decorative material

Claims (4)

A decorative sheet having a pattern layer, a transparent resin layer, and a surface protective layer laminated in this order,
the pattern layer includes a light color portion and a dark color portion that is darker than the light color portion, and a color difference ΔE between the light color portion and the dark color portion in a CIE 1976 L*a*b* color space is 3 or more and less than 7;
the surface protective layer includes a high-gloss portion and a low-gloss portion having a lower gloss than the high-gloss portion,
the low gloss portion overlaps with 80% or more of an area of the dark color portion so that the dark color portion and the low gloss portion are in harmony with each other when viewed from the surface protective layer side ,
The 85 degree specular gloss of the low gloss portion is 8% or less,
The 85 degree specular gloss of the high gloss portion is 2% or more higher than the 85 degree specular gloss of the low gloss portion.
Decorative sheet. The decorative sheet according to claim 1 , wherein a color difference ΔE between the light color portion and the dark color portion in the CIE 1976 L*a*b* color space is 5 or more. The decorative sheet according to claim 1 or 2 , further comprising a base sheet disposed on a surface of the design layer opposite to the surface on the transparent resin layer side. A decorative sheet according to any one of claims 1 to 3 ;
A decorative material comprising the decorative sheet and a substrate laminated thereto.

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