Decorative sheet and decorative material

Abstract

To provide a decorative sheet and a decorative material having a texture close to that of the surface of wood or stone used as a building material and having excellent design effect.SOLUTION: The decorative sheet 1 includes a base material layer 2 containing a polyvinyl chloride resin as a main component, a pattern layer 3 laminated on one surface of the base material layer 2 in order, and a transparent resin layer 4 containing a polyvinyl chloride resin as a main component, wherein the pattern layer 3 includes a heat absorbing part 3a formed of a predetermined material having light absorptivity higher than that of light of other wavelengths with respect to light of a predetermined wavelength, and includes a harmonic emboss part 5a having a higher degree of unevenness at a position overlapping the heat absorbing part 3a in a plan view on an outermost surface of the decorative sheet 1 on a side of the transparent resin layer 4.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a decorative sheet and a decorative material. [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 is often imitated to resemble the surface of wood, stone, or the like. [Prior art documents] [Patent documents]

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

[0004] Incidentally, decorative sheets tend to have a flat surface texture compared to real wood or stone. Actual wood and stone have 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. As a method for further improving the design and realism of decorative sheets, a method has been proposed in which the surface of the decorative sheet is provided with irregularities, and the irregularities are made to match the printed pattern of the decorative sheet.

[0005] In order to form the recesses and protrusions in synchronization with the printed pattern, it is necessary to prepare a plate for printing the pattern and a plate for forming the recesses and protrusions, and these must be prepared for each printed pattern, which is costly.In addition, it is not easy to form the recesses and protrusions in synchronization with the pattern using a plate for printing the pattern and a plate for forming the recesses and protrusions, making stable production difficult.

[0006] There are also methods for enhancing the design by creating a difference in gloss on the surface of a decorative sheet to create a visual illusion, but if the difference in gloss disappears due to wear, etc., the design cannot be achieved. In particular, when a decorative sheet with design is attached to a substrate or the like to be used as flooring, a decorative sheet that can maintain its design has been desired. The present invention has been made in view of the above-mentioned points, and aims to provide a decorative sheet and decorative material that has a texture close to the real thing, has excellent durability, and has a designability. [Means for solving the problem]

[0007] According to one aspect of the present invention, there is provided a decorative sheet comprising a base layer primarily composed of polyvinyl chloride resin, and a pattern layer and a transparent resin layer primarily composed of polyvinyl chloride resin, laminated in that order on one side of the base layer, wherein the pattern layer includes a heat absorption portion formed of a specified material that is more light absorbing for light of a specified wavelength than for light of other wavelengths, and wherein the decorative sheet is provided with a synchronized embossed portion on the outermost surface of the transparent resin layer side of the decorative sheet, at a position that overlaps with the heat absorption portion in a planar view, which has a greater degree of unevenness than the degree of unevenness at a position that does not overlap with the heat absorption portion in a planar view.

[0008] In addition, according to another aspect of the present invention, there is provided a decorative sheet comprising a base layer primarily composed of polyvinyl chloride resin, a pattern layer and a transparent resin layer primarily composed of polyvinyl chloride resin laminated in that order on one side of the base layer, and a heat absorbing portion laminated on the other side of the base layer and formed of a specified material that has greater light absorption for light of a specified wavelength than for light of other wavelengths, wherein the decorative sheet comprises a synchronized embossed portion on the outermost surface of the decorative sheet on the transparent resin layer side, at a position that overlaps with the heat absorbing portion in a planar view, which has a greater degree of unevenness than the position that does not overlap with the heat absorbing portion in a planar view.

[0009] Furthermore, according to another aspect of the present invention, there is provided a decorative material comprising a substrate for a decorative material and the above-mentioned decorative sheet provided on at least one surface of the substrate for a decorative material. [Effects of the Invention]

[0010] According to one embodiment of the present invention, decorative sheets and decorative materials that have a texture close to the real thing, excellent durability, and design properties can be easily obtained. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a cross-sectional view schematically illustrating an example of a decorative sheet and decorative material according to one embodiment of the present invention. [Figure 2] FIG. 2 is a process diagram showing an example of a manufacturing process for the decorative sheet and decorative material of FIG. [Figure 3] FIG. 2 is a cross-sectional view schematically illustrating an example of a decorative sheet and decorative material according to another embodiment of the present invention. [Figure 4] FIG. 4 is a process diagram showing an example of a manufacturing process for the decorative sheet and decorative material of FIG. [Figure 5] FIG. 2 is a cross-sectional view schematically illustrating an example of a decorative sheet and decorative material according to another embodiment of the present invention. [Figure 6] FIG. 6 is a process diagram showing an example of a manufacturing process for the decorative sheet and decorative material of FIG. 5. [Figure 7] FIG. 2 is a cross-sectional view schematically illustrating an example of a decorative sheet and decorative material according to another embodiment of the present invention. [Figure 8] FIG. 8 is a process diagram showing an example of a manufacturing process for the decorative sheet and decorative material of FIG. [Figure 9] FIG. 2 is a cross-sectional view schematically illustrating an example of a decorative sheet and decorative material according to another embodiment of the present invention. [Figure 10] FIG. 2 is a cross-sectional view schematically illustrating an example of a decorative sheet and decorative material according to another embodiment of the present invention. [Figure 11] FIG. 2 is a cross-sectional view schematically illustrating an example of a decorative sheet and decorative material according to another embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0012] 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.

[0013] 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." The configuration of the decorative material 10 will be described below with reference to FIG.

[0014] FIG. 1 is a cross-sectional view showing an example of a decorative material 10 according to one embodiment of the present invention. As shown in FIG. 1, the decorative material 10 comprises a decorative sheet 1 and a substrate 9 which is a substrate for a decorative material and a substrate to which the decorative sheet 1 is attached. The substrate 9 is formed into a plate shape using, for example, a wooden board, an inorganic board, a metal plate, etc., and a decorative sheet 1 is laminated on one side (the upper side in Figure 1) via an adhesive layer 8.

[0015] The decorative material 10 is not limited to a configuration in which the decorative sheet 1 is provided on only one side of the base material 9, but may also be configured to provide the decorative sheet 1 on the other side of the base material 9 (the lower side in Figure 1) in addition to the one side of the base material 9.

[0016] [Configuration of decorative sheet] As shown in Fig. 1, a decorative sheet 1 according to one embodiment of the present invention is formed by laminating, in this order, a base layer 2, a design layer 3, a transparent resin layer 4, and a surface protective layer 5. In addition, an uneven shape is formed from the surface protective layer 5 to the transparent resin layer 4.

[0017] [Base material layer] The base layer 2 is a resin layer containing a plasticizer whose main component is polyvinyl chloride resin, and is formed of, for example, a polyvinyl chloride (PVC) resin film, etc. Here, the main component refers to a resin material that accounts for 51% by mass or more of the materials that make up the base layer 2. The base layer 2 may be an opaque colored resin layer or a transparent resin layer. When the base layer 2 is an opaque colored resin layer, it has concealing properties, so that when, for example, the decorative sheet 1 is bonded to a predetermined substrate to form a decorative material, color variations and defects on the surface of the substrate can be concealed.

[0018] By forming the base material layer 2 from PVC, it is possible to reuse leftover decorative sheet 1 from the production of decorative material 10 or used decorative sheet 1 as a recycled base material by melting it and extruding it using an extruder, etc. Furthermore, PVC is easier to recycle by melting it than olefin-based resins.

[0019] The substrate layer 2, which is a colored sheet (colored film) made of opaque colored polyvinyl chloride resin, can have an appropriate hue selected as the base color of the picture layer 3. In addition, when taking advantage of the texture of the surface of the substrate 9, which is the substrate for the decorative material, the substrate layer 2 is preferably a colored polyvinyl chloride resin layer having a transparency sufficient to allow the surface of the substrate 9 to be seen through.

[0020] For example, the base layer 2 can be colored by mixing or kneading a coloring agent such as a pigment into the resin material (polyvinyl chloride resin) that constitutes the base layer 2. While organic or inorganic pigments can be used as coloring agents, inorganic pigments are preferred. In other words, the base layer 2 preferably contains an inorganic substance as a coloring agent. For example, the substrate layer 2 preferably contains one or more inorganic substances selected from calcium carbonate, titanium oxide, carbon black, silica, chromium, antimony, titanium composites, other oxides, etc. Adding an inorganic substance to the substrate layer 2 can enhance the hiding power of the substrate layer 2.

[0021] If necessary, one or more additives selected from various additives such as colorants, fillers, UV absorbers, light stabilizers, heat stabilizers, antioxidants, antistatic agents, lubricants, flame retardants, antibacterial agents, antifungal agents, antifriction agents, light scattering agents, and gloss adjusters may be added to the base layer 2. In particular, the base layer 2 preferably contains either or both of a benzotriazole-based or triazine-based weathering agent and a hindered amine light stabilizer (HALS), which is a light stabilizer using a hindered amine compound.

[0022] The thickness of the base material layer 2 is preferably within the range of 0.06 mm to 0.35 mm. If the thickness of the base material layer 2 is less than 0.06 mm, it will be difficult to work with in the manufacturing process and problems such as wrinkles will occur when heated, while if it is thicker than 0.35 mm, it will take a long time for the surface temperature of the decorative sheet 1 to reach a temperature sufficient to obtain the desired degree of unevenness. The specific gravity of the base material layer 2 is preferably in the range of 1.2 to 1.6. Because the specific gravity of the base material layer 2 makes it difficult to obtain a sufficient temperature difference between the high-temperature and low-temperature areas on the surface of the decorative sheet 1, the specific gravity of the base material layer 2 is preferably in the range of 1.2 to 1.6, which makes it easier to obtain a sufficient temperature difference.

[0023] Furthermore, the ratio of plasticizer to polyvinyl chloride resin in the base layer 2 is preferably within the range of 5 to 40 parts by mass per 100 parts by mass of polyvinyl chloride resin. If the ratio of plasticizer to polyvinyl chloride resin is less than 5 parts by mass per 100 parts by mass of polyvinyl chloride resin, the polyvinyl chloride will become hard, making embossing difficult and causing cracks in post-processing or breakage during production, while if the ratio is more than 40 parts by mass, the polyvinyl chloride will become soft and prone to sagging, causing flaring and wrinkles in post-processing.

[0024] [Picture layer] The pattern layer 3 is laminated on one surface (the upper surface in FIG. 1) of the base layer 2, and is a layer for adding a pattern to impart design. That is, the pattern layer 3 is provided between the base layer 2 and the transparent resin layer 4.

[0025] The pattern layer 3 may be omitted if it can be substituted by coloring the base layer 2.

[0026] The pattern layer 3 has a heat absorbing portion 3a and a non-heat absorbing portion 3b, and the pattern of the pattern layer 3 is formed by the heat absorbing portion 3a and the non-heat absorbing portion 3b. The heat absorbing portion 3a is formed of a predetermined material that is more absorbing of light of a predetermined wavelength than light of other wavelengths, and is formed of a predetermined material that is more absorbing of light of the predetermined wavelength than the non-heat absorbing portion 3b, the base layer 2, and the transparent resin layer 4, for example, formed of a heat absorbing material that has infrared absorbing properties. In other words, a material with low infrared transmittance is used for the heat absorbing portion 3a, and a material with significantly lower infrared transmittance than the other layers is used. The heat absorbing portion 3a is formed of, for example, a material containing black ink containing carbon black, such as urethane-based printing ink.

[0027] The ink forming the heat absorbing portion 3a may be any material that has light absorbing properties such that it absorbs all light in the infrared wavelength range but absorbs light with wavelengths in the range of 800 nm to 2500 nm more than light with wavelengths of other wavelengths, and may be, for example, at least one inorganic material selected from the group consisting of tin-doped indium oxide, antimony-doped tin oxide, lanthanum hexaboride, and cesium-doped tungsten oxide.

[0028] Furthermore, the heat absorbing parts 3a have a thickness that allows the transparent resin layer 4 to be softened to an extent that allows a desired uneven shape to be formed on the surface protective layer 5. In order to obtain a sufficient gloss matte effect, it is preferable that the difference in gloss between the parts of the surface of the surface protective layer 5 that overlap with the heat absorbing parts 3a and the parts that overlap with the non-heat absorbing parts 3b in a plan view is 5 or more.

[0029] The non-heat absorbing portion 3b is formed using printing ink, paint, etc. The printing ink, paint, etc. that forms the non-heat absorbing portion 3b is formed, for example, by dissolving or dispersing a colorant such as a dye or pigment together with an appropriate binder resin in an appropriate dilution solvent. Examples of binder resins that can be used include, but are not limited to, urethane resins, acrylic resins, vinyl chloride acetate resins, polyimide resins, soluble nitrocellulose, and mixtures thereof.

[0030] The printing ink or paint that forms the heat absorbing portion 3a and the non-heat absorbing portion 3b is applied using various printing methods such as gravure printing or offset printing, or various coating methods such as gravure coating or roll coating.

[0031] Any design can be used for the design layer 3. For example, any design may be adopted 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. Furthermore, for wood-based designs, various wood grains or cork can be used as the design. In addition to designs of natural materials, artificial designs based on these motifs or geometric patterns can also be used. Other examples of design patterns include wood grain patterns composed of the spring and autumn wood regions and vessels of tree ring cross sections, leather (grain) patterns, stone grain patterns on the surface of stone materials such as marble, granite, and sandstone, pear-skin patterns, sand grain patterns, tile patterns, brickwork patterns, fabric patterns, geometric shapes, letters, symbols, abstract patterns, floral patterns, landscapes, characters, and combinations of these patterns can also be used.

[0032] The pattern of the pattern layer 3 is formed by heat absorbing parts 3a and non-heat absorbing parts 3b. For example, if the pattern of the pattern layer 3 is a wood grain pattern, the duct parts are represented by heat absorbing parts 3a and the non-ductive parts are represented by non-heat absorbing parts 3b. If the pattern of the pattern layer 3 is a stone grain pattern, the parts of the stone grain with low gloss are represented by heat absorbing parts 3a and the parts of the stone grain with high gloss are represented by non-heat absorbing parts 3b. For example, cracked parts of marble are represented by heat absorbing material 3a.

[0033] The thickness of the design layer 3 is preferably in the range of 1 μm or more and 10 μm or less. This is because when the thickness of the design layer 3 is 1 μm or more, it is possible to make the printing clear. On the other hand, when the thickness of the design layer 3 is 10 μm or less, it is possible to improve the printing workability when producing the decorative sheet 1 and to reduce the production costs.

[0034] In addition, functional additives such as extender pigments, plasticizers, dispersants, surfactants, tackifiers, adhesive aids, drying agents, curing agents, curing accelerators, and curing retarders may be added to the pattern layer 3 to impart various functions.

[0035] For example, in order to improve the concealing ability of the color and pattern of the base material to which the decorative sheet 1 is attached, a concealing layer may be provided between the design layer 3 and the base layer 2. The concealing layer may be formed using, for example, an opaque printing ink or paint containing a large amount of opaque pigments such as titanium dioxide or iron oxide.

[0036] [Transparent resin layer] The transparent resin layer 4 is a resin layer that provides thickness and depth for design purposes, as well as protecting the pattern layer 3 and imparting good surface properties to improve the weather resistance and abrasion resistance of the decorative sheet 1. The transparent resin layer 4 is a resin layer containing a plasticizer whose main component is polyvinyl chloride resin, and is formed, for example, from a polyvinyl chloride (PVC) resin film. Here, the term "main component" refers to a resin material that accounts for 51% or more by mass of the materials that make up the transparent resin layer 4. As mentioned above, PVC can be used as a recycled substrate by melting and extruding it, and is easier to reuse by melting than olefin-based resins.

[0037] That is, by forming the base layer 2 and the transparent resin layer 4 of the decorative sheet 1 according to this embodiment from PVC, it is possible to reliably improve processability and recyclability. The transparent resin layer 4 preferably has a transparency sufficient to allow the pattern layer 3 provided on the surface (the lower surface in FIG. 1) on the side of the base layer 2 to be seen through. The transparent resin layer 4 may be, for example, colorless and transparent, colored and transparent, or translucent.

[0038] For the same reasons as for the base layer 2, the transparent resin layer 4 preferably has a thickness of 0.06 mm or more and 0.35 mm or less, a specific gravity of 1.2 or more and 1.6 or less, and furthermore, the ratio of plasticizer to polyvinyl chloride resin is preferably 5 parts by mass or more and 40 parts by mass or less per 100 parts by mass of polyvinyl chloride resin.

[0039] [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 base layer 2. 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 film cured using a known coating device, heat drying device, or ionizing radiation irradiation device depending on the type of curable resin.

[0040] 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.

[0041] 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.

[0042] Examples of prepolymers having a radically polymerizable unsaturated group include polyester (meth)acrylate, urethane (meth)acrylate, epoxy (meth)acrylate, melamine (meth)acrylate, triazine (meth)acrylate, silicone (meth)acrylate, etc. The molecular weight of these is preferably about 250 to 100,000. Furthermore, examples of the monomer having a radically polymerizable unsaturated group include monofunctional monomers such as methyl(meth)acrylate, 2-ethylhexyl(meth)acrylate, and phenoxyethyl(meth)acrylate. Examples of the polyfunctional monomer include diethylene glycol di(meth)acrylate, propylene glycol di(meth)acrylate, trimethylpropane tri(meth)acrylate, trimethylolpropane ethylene oxide tri(meth)acrylate, dipentaerythritol tetra(meth)acrylate, dipentaerythritol penta(meth)acrylate, and dipentaerythritol hexa(meth)acrylate.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] [Uneven shape] The surface of the surface protection layer 5 is formed with an uneven shape forming an uneven pattern in order to impart a given design. Examples of the uneven pattern include the vessel grooves of a wood grain board, the uneven surface of a stone slab (such as the cleavage plane of granite), the texture of a cloth surface, matte finish, sand grain, hairline, and linear grooves. The uneven pattern can be formed, for example, by embossing. The embossing method is not particularly limited. For example, a known sheet-fed embossing machine or rotary embossing machine can be used. This allows the decorative sheet 1 to be given a good texture that is close to that of real wood or stone.

[0048] The surface protection layer 5 includes a synchronized embossed portion 5a having a desired unevenness and a non-synchronized embossed portion 5b having a less unevenness than the synchronized embossed portion 5a. The synchronized embossed portion 5a is formed in a position overlapping the heat absorbing portion 3a in a planar view, and the non-synchronized embossed portion 5b is formed in a position overlapping the non-heat absorbing portion 3b in a planar view. The synchronized embossed portion 5a has a greater unevenness than the non-synchronized embossed portion 5b, resulting in a difference in gloss (gloss difference) between the synchronized embossed portion 5a and the non-synchronized embossed portion 5b, resulting in a gloss matte effect. To achieve a sufficient gloss matte effect, the gloss difference between the synchronized embossed portion 5a and the non-synchronized embossed portion 5b is preferably 5 or more.

[0049] Furthermore, when a matte pattern is formed in both the synchronized embossed portions 5a and the non-synchronized embossed portions 5b, a matte pattern is formed over the entire surface of the surface protective layer 5, and a gloss matte effect can be obtained due to the difference in gloss between the synchronized embossed portions 5a and the non-synchronized embossed portions 5b. That is, by forming the synchronized embossed portions 5a in positions corresponding to the vessel grooves of the wood grain board and forming the non-synchronized embossed portions 5b in positions not corresponding to the vessel grooves of the wood grain board, a matte pattern is formed over the entire surface protective layer 5, and a gloss matte effect is achieved in the vessel groove portions of the wood grain board.

[0050] [Adhesive layer] The adhesive layer 8 is a layer made of an adhesive, and is a layer for bonding the base material 9 and the base material layer 2 together. The material for the adhesive layer 8 is not particularly limited as long as it contributes to improving the adhesive strength between any resins. For example, various materials such as acrylic, polyester, polyurethane, and epoxy can be used, but it is preferable to select the material depending on the material of the substrate 9. For example, when bonding to a substrate 9 made of polyvinyl chloride resin, a vinyl acetate adhesive is preferable from the perspective of recyclability. The coating method can also be selected appropriately depending on the viscosity of the coating liquid, etc. The thickness of the adhesive layer 8 is preferably about 0.5 μm to 6 μm. [Adhesive resin layer] An adhesive resin layer (not shown) is provided as needed to bond the base material layer 2 provided with the pattern layer 3 to the transparent resin layer 4. If the target adhesive strength can be obtained without the adhesive resin layer, the adhesive resin layer need not be provided. The adhesive resin layer may be made of the same material as the adhesive layer 8 described above.

[0051] [Method for manufacturing decorative sheet] Next, an example of the manufacturing process for the decorative sheet according to this embodiment will be described with reference to FIG. First, the base layer 2 is formed using, for example, a colored polyvinyl chloride resin (FIG. 2(a)).

[0052] Next, the non-heat absorbing portion 3b and the heat absorbing portion 3a are printed by a gravure printing machine on one surface of the base layer 2. At this time, the printing is performed so that the surface of the heat absorbing portion 3a becomes part of the surface of the design layer 3. For example, the heat absorbing portion 3a is printed using a vinyl chloride / vinyl acetate printing ink containing carbon black, and the non-heat absorbing portion 3b is printed using a vinyl chloride / vinyl acetate printing ink that does not contain carbon black.

[0053] Next, a resin containing a transparent polyvinyl chloride resin as the main component that will become the transparent resin layer 4 and the laminate of the base material layer 2 and the pattern layer 3 shown in Figure 2(a) are heated and integrated by thermal lamination. Furthermore, a resin containing a curable resin as the main component that will become the surface protective layer 5 is laminated on top of the resin layer containing a polyvinyl chloride resin as the main component, to obtain a laminate of the base material layer 2, the pattern layer 3, the transparent resin layer 4, and the surface protective layer 5 (Figure 2(b)).

[0054] Next, the laminate shown in Figure 2(b) is heated by an infrared heater (Figure 2(c)), and then, for example, a matte embossing roll is pressed against it from the surface protective layer 5 side to obtain the decorative sheet 1 (Figure 2(d)).

[0055] Here, the heat absorbing portion 3a is formed with a vinyl chloride / vinyl acetate printing ink containing carbon black, which has infrared absorbing properties. Furthermore, the heat absorbing portion 3a is made of a material with significantly lower infrared transmittance than the other layers. Therefore, in plan view, the infrared transmittance of the region where the heat absorbing portion 3a is formed is higher than that of the region where the non-heat absorbing portion 3b is formed, resulting in a difference in infrared transmittance in the laminate shown in Figure 2(c) in plan view. Therefore, when the laminate is irradiated with infrared rays, the transparent resin layer 4 and the surface protective layer 5 are more likely to soften in the portion of the surface protective layer 5 that overlaps with the heat absorbing portion 3a in plan view, i.e., the portion with high infrared absorptivity, compared to the portion overlapping with the non-heat absorbing portion 3b. In other words, after infrared irradiation, the transparent resin layer 4 and the surface protective layer 5 have portions that are more likely to soften and portions that are less likely to soften. Therefore, when an embossing roll with a matte finish is pressed against the surface protective layer 5 in this state, the softened portion is more likely to develop irregularities, while the less-softened portion is less likely to develop irregularities. That is, unevenness is likely to form in the softened portions of the transparent resin layer 4 and the surface protective layer 5, i.e., in the portions that overlap with the heat absorbing portions 3a in a planar view. As a result, an uneven shape with a relatively large degree of unevenness is formed only in the positions of the transparent resin layer 4 and the surface protective layer 5 that overlap with the heat absorbing portions 3a in a planar view (synchronized embossed portions 5a), and an uneven shape with a smaller degree of unevenness than the uneven shape of the heat absorbing portions 3a is formed in the positions that overlap with the non-heat absorbing portions 3b (non-synchronized embossed portions 5b).

[0056] This makes it possible to form synchronized embossed portions 5a having a highly irregular shape at positions synchronized with the heat absorbing portions 3a that are the patterns of the pattern layer 3. In other words, it is possible to easily create synchronized embossed portions 5a synchronized with the pattern layer 3 without performing highly accurate positioning operations. The surface protective layer 5 thus has areas where synchronized embossed portions 5a with a high degree of irregularity are formed, and non-synchronized embossed portions 5b with a smaller degree of irregularity, resulting in the development of a gloss matte finish.

[0057] That is, a matte pattern is formed on the entire surface of the surface protection layer 5, and the uneven shape of the synchronous embossed portion 5a becomes relatively uneven, so that a gloss matte finish appears in the synchronous embossed portion 5a.

[0058] Although the thermal energy retained by the heat absorbing portion 3a upon infrared irradiation is likely to be affected by the infrared transmittance and reflectance of each layer constituting the laminate, the thermal energy retained by the other layers is uniform regardless of whether the heat absorbing portion 3a is formed or not. Furthermore, the thermal energy retained by each layer upon infrared irradiation is minute compared to the energy absorbed by the heat absorbing portion 3a, and is therefore negligible. Therefore, the influence of the infrared transmittance and reflectance of the other layers on the development of the gloss matte effect can be considered negligible, and the development of the gloss matte effect can be considered to be due to the relative difference between the thermal energy retained by the region where the heat absorbing portion 3a is formed in plan view and the thermal energy retained by the region where the non-heat absorbing portion 3b is formed in plan view.

[0059] The timing for pressing the embossing roll onto the transparent resin layer 4 and the surface protective layer 5 after infrared irradiation is not limited to immediately after infrared irradiation, but may be any timing that allows the embossing roll to be pressed against the surfaces of the transparent resin layer 4 and the surface protective layer 5 to selectively form an uneven shape in the parts softened by infrared irradiation.

[0060] In addition, other processes may be included between the process of forming the surface protection layer 5 and the process of performing infrared irradiation, and the key point is that the infrared irradiation should be performed in a state where the transparent resin layer 4 and the surface protection layer 5 have been formed.

[0061] [Effects of this embodiment] (1) In the decorative sheet 1 according to this embodiment, infrared irradiation causes the heat absorption portion 3a to absorb more heat. As a result, the portions of the transparent resin layer 4 and the surface protective layer 5 that overlap the heat absorption portion 3a in a planar view become hotter than the portions that do not overlap the heat absorption portion 3a (portions that overlap the non-heat absorption portion 3b). This makes it easier to transfer the embossed shape when embossed. Therefore, gloss differences arise depending on the degree of unevenness of the transferred shape. In other words, even without highly precise positioning of the area where the embossing plate is pressed, it is easy to form a highly uneven shape only in the desired position. As a result, gloss matte can be easily produced in the desired position, making it easy to obtain a decorative sheet with excellent design properties.

[0062] Furthermore, since there is no need for highly accurate alignment, production can be carried out stably, yields can be improved, and material loss can be reduced, leading to improved productivity and reduced material loss, and reducing the energy and petroleum resources required for production. Furthermore, by providing the heat absorbing portion 3a in plan view, it is possible to provide portions on the surface of the decorative sheet 1 that are easy to transfer the shape created by the embossing and portions that are difficult to transfer, thereby increasing the difference in gloss between the high gloss portion and the low gloss portion and further improving the design.

[0063] Furthermore, because the heat absorbing portion 3a can be strongly embossed at its position, the position of the synchronized embossed portion 5a can be changed by changing the position of the heat absorbing portion 3a. Therefore, it is not necessary to prepare an embossing plate for each design of the design layer 3, which can reduce costs.

[0064] Furthermore, even when using an embossing plate that imparts a finely textured design such as a matte finish or sand grain, a highly textured surface will cause light to be reflected more diffusely than a less textured surface, resulting in a lower gloss and creating a gloss difference. Therefore, by arranging the heat absorbing portion 3a in the part of the design of the design layer 3 where you want to appear less glossy, you can create a low-gloss area that matches the design. In this case, too, the embossing plate does not need to be a dedicated embossing plate that matches the design of the design layer 3; a general embossing plate such as a matte finish or sand grain can be used to impart a design that matches the design.

[0065] Furthermore, many store flooring materials use polyvinyl chloride resin substrates, and decorative materials have been commercialized in which a decorative sheet with a design is laminated onto the polyvinyl chloride resin substrate. If the decorative sheet used here is a decorative sheet whose main component is olefin resin, the product is no longer composed of a single material, resulting in reduced recyclability. On the other hand, if the decorative sheet is made of polyvinyl chloride resin, the material of the decorative sheet is the same as the material of the substrate, thereby improving recyclability.

[0066] Furthermore, by providing an uneven surface to the decorative sheet, a difference in gloss is created to achieve a gloss matte finish, which prevents the gloss difference from decreasing due to wear, etc., and therefore prevents a decrease in design even when used as flooring, etc.

[0067] (2) Furthermore, the base layer and the transparent resin layer are formed to satisfy at least one of the following: a specific gravity of 1.2 or more and 1.6 or less, a thickness of 0.06 mm or more and 0.35 mm or less, and a ratio of plasticizer to polyvinyl chloride resin of 5 parts by mass or more and 40 parts by mass or less per 100 parts by mass of polyvinyl chloride resin. Therefore, it is possible to obtain a decorative sheet containing polyvinyl chloride resin as a main component, which has excellent properties in terms of design, processability, productivity, durability, and mono-material properties.

[0068] (3) Furthermore, since the heat absorbing portion 3a has a higher light absorption property for light of a predetermined wavelength than the base layer and the transparent resin layer, the heat absorbing portion 3a can efficiently absorb the heat energy generated by infrared radiation.

[0069] [Modification] (1) As shown in Figure 2(e), the decorative sheet 1 according to the above embodiment may be attached to a substrate 9, which is a substrate for a decorative material, via an adhesive layer 8 to form a decorative material 10. In the decorative material 10, the decorative sheet 1 may be provided on at least one side of the substrate 9, or may be provided on both sides.

[0070] [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.

[0071] Thus, decorative material 10 comprises substrate 9 and decorative sheet 1 provided on at least one surface of substrate 9. The substrate 9 can be any of a wood substrate, a resin substrate, a non-flammable substrate, and a metal substrate. The decorative sheet 1 is formed from a resin whose main component is polyvinyl chloride resin, and therefore by bonding it to a substrate 9 made of polyvinyl chloride resin, recyclability can be improved.

[0072] (2) In the above embodiment, a case where a surface protective layer 5 is provided as shown in Fig. 1 has been described, but the surface protective layer 5 does not necessarily have to be provided as shown in Fig. 3. When the surface protective layer 5 is not provided, an uneven shape (synchronized embossed portions 4a, non-synchronized embossed portions 4b) is formed on the surface of the outermost layer among the layers constituting the decorative sheet 1, which in the case of Fig. 3 is the transparent resin layer 4. The manufacturing process for decorative sheet 1a without surface protective layer 5 is the same as the manufacturing process for decorative sheet 1 with surface protective layer 5 shown in Figure 2, except for the step of forming surface protective layer 5, as shown in Figure 4, and decorative material 10a can be obtained by attaching decorative sheet 1a to substrate 9 via adhesive layer 8.

[0073] (3) In the above embodiment, as shown in Fig. 1, a decorative sheet 1 was described in which a heat absorbing portion 3a was provided in the picture layer 3. However, instead of providing a heat absorbing portion 3a in the picture layer 3, a heat absorbing portion 6 may be provided on the surface of the base layer 2 opposite the picture layer 3', as shown in Fig. 5. The heat absorbing portion 6 has the same characteristics as the heat absorbing portion 3a. The heat absorbing portion 6 is provided in a position that overlaps with, i.e., is synchronized with, the picture of the picture layer 3 in a plan view.

[0074] In this case as well, infrared irradiation softens the portions of the surface protective layer 5 and the transparent resin layer 4 that overlap with the heat absorbing portions 6 in plan view more easily than the portions that do not overlap with the heat absorbing portions 6. Therefore, by pressing the embossing roll against the portions of the surface protective layer 5 and the transparent resin layer 4 that overlap with the heat absorbing portions 6 in plan view, the portions are embossed more strongly to form synchronized embossed portions 5a having a highly irregular shape, and the portions that do not overlap with the heat absorbing portions 6 are embossed less strongly to form non-synchronized embossed portions 5b having a less irregular shape. Therefore, in this case as well, the same effects as those described above can be obtained. In this case, the surface protection layer 5 does not necessarily have to be provided.

[0075] FIG. 6 shows an example of a manufacturing process for the decorative sheet 1b shown in FIG. 5, in which the heat absorbing portion 6 is provided on the surface of the base layer 2 opposite the pattern layer 3'. First, the base layer 2 is formed using, for example, a colored polyvinyl chloride resin (FIG. 6(a)).

[0076] Next, a design layer 3' is printed by a gravure printing machine on one surface of the base layer 2. The design layer 3' is printed using, for example, vinyl chloride-vinyl acetate-based printing ink that does not contain carbon black. Next, as shown in Figure 6(b), a heat absorbing portion 6 is printed on the base layer 2 using, for example, a vinyl chloride-vinyl acetate printing ink containing carbon black. The heat absorbing portion 6 is provided in a position that matches the pattern on the pattern layer 3'.

[0077] Next, the laminate of the design layer 3', base layer 2, and heat absorbing part 6 shown in Figure 6(c) and a resin mainly composed of transparent polyvinyl chloride resin that will become the transparent resin layer 4 are heated and thermally laminated to integrate the transparent resin layer 4 on the surface of the laminate of the heat absorbing part 6, base layer 2, and design layer 3' on the side of the design layer 3', as shown in Figure 6(d). Furthermore, a resin mainly composed of a curable resin that will become the surface protective layer 5 is laminated on top of the transparent resin layer 4 to obtain a laminate in which the heat absorbing part 6, base layer 2, design layer 3', transparent resin layer 4, and surface protective layer 5 are laminated in this order.

[0078] Next, the laminate shown in Figure 6(d) is heated with an infrared heater (Figure 6(e)), and then, for example, a matte embossing roll is pressed against the surface protective layer 5 from the side, forming unevenness (synchronized embossed areas 5a and non-synchronized embossed areas 5b) on the surface of the surface protective layer 5. This results in a decorative sheet 1b with a heat absorbing area 6 on the side of the base layer 2 opposite the design layer 3'. As with the decorative sheet 1, a base 9 is attached to the heat absorbing area 6 side of the base layer 2 via an adhesive layer 8, thereby obtaining a decorative material 10b (Figure 6(f)).

[0079] Note that the pattern layer 3' is laminated on one surface of the base layer 2, then the heat absorbing portion 6 is formed on the other surface of the base layer 2, and then the transparent resin layer 4 and the surface protective layer 5 are formed on the surface of the pattern layer 3' opposite the base layer 2, but this is not limitative. For example, the pattern layer 3', the transparent resin layer 4, and the surface protective layer 5 may be formed in this order on one surface of the base layer 2, and then the heat absorbing portion 6 may be formed on the other surface.

[0080] (4) Decorative sheet 1c may be constructed by combining decorative sheet 1 shown in Fig. 1 with decorative sheet 1b shown in Fig. 5, as shown in Fig. 7, which includes heat absorbing portion 6 on the surface of base layer 2 opposite to pattern layer 3, and further includes heat absorbing portion 3a on pattern layer 3 so as to contact transparent resin layer 4. In this case, the same effects as those described above can be obtained. In this case, the surface protection layer 5 does not necessarily have to be provided.

[0081] Figure 8 shows an example of a manufacturing process for decorative sheet 1c, as shown in Figure 7, in which a heat absorption section 6 is provided on the side of the base layer 2 opposite the pattern layer 3, and a heat absorption section 3a is provided on the pattern layer 3 so as to be in contact with the transparent resin layer 4. First, the base layer 2 is formed using, for example, a colored polyvinyl chloride resin (FIG. 8(a)).

[0082] Next, the non-heat absorbing portion 3b and the heat absorbing portion 3a are printed on one surface of the base layer 2 using a gravure printing machine. At this time, the printing is performed so that the surface of the heat absorbing portion 3a becomes part of the surface of the design layer 3. For example, the heat absorbing portion 3a is printed using a vinyl chloride / vinyl acetate printing ink that contains carbon black, and the non-heat absorbing portion 3b is printed using a vinyl chloride / vinyl acetate printing ink that does not contain carbon black. Furthermore, the heat absorbing portion 3a is printed in a position that matches the design of the design layer 3.

[0083] Next, as shown in Figure 8(b), a heat absorbing portion 6 is printed on the surface of the base layer 2 opposite the pattern layer 3 using, for example, a vinyl chloride-vinyl acetate printing ink containing carbon black. The heat absorbing portion 6 is provided in a position that matches the pattern of the pattern layer 3. In other words, it is formed in a position that overlaps the heat absorbing portion 3a in a plan view.

[0084] Next, the laminate of the design layer 3, base layer 2, and heat absorbing part 6 shown in Figure 8(c) and a resin mainly composed of transparent polyvinyl chloride resin that will become the transparent resin layer 4 are heated and thermally laminated to integrate the transparent resin layer 4 on the surface of the laminate of the design layer 3, base layer 2, and heat absorbing part 6 on the side of the design layer 3, as shown in Figure 8(d). Furthermore, a resin mainly composed of a curable resin that will become the surface protective layer 5 is laminated on top of the transparent resin layer 4 to obtain a laminate in which the heat absorbing part 6, base layer 2, design layer 3, transparent resin layer 4, and surface protective layer 5 are laminated in this order.

[0085] Next, the laminate shown in Fig. 8(d) is heated with an infrared heater (Fig. 8(e)), and then, for example, a matte embossing roll is pressed against it from the side of the surface protection layer 5. This results in a decorative sheet 1c having an uneven surface (synchronized embossed portions 5a and non-synchronized embossed portions 5b) (Fig. 8(f)). Then, a substrate 9 is attached to the heat absorption portion 6 side of the substrate layer 2 via an adhesive layer 8, thereby obtaining a decorative material 10c. In addition, in FIG. 7, the case where the heat absorbing portion 3a and the heat absorbing portion 6 are formed so as to overlap in a planar view is described, but for example, as shown in FIG. 9, the heat absorbing portion 3a and the heat absorbing portion 6 do not have to overlap in a planar view.

[0086] 1, the heat absorbing portion 3a is provided so as to form part of the surface of the picture layer 3 on the side where the uneven shape is formed, but this is not limited to this. For example, as shown in Fig. 10, the heat absorbing portion 3a may be provided so as to form part of the surface opposite the side where the uneven shape is formed of the picture layer 3. Similarly, in the decorative sheet 1a shown in Fig. 3, the decorative sheet 1c shown in Fig. 7, and the decorative sheet shown in Fig. 9, the heat absorbing portion 3a may be provided so as to form part of the surface opposite the side where the uneven shape is formed of the picture layer 3.

[0087] (5) In the embodiment shown in FIG. 1, a uniformly colored concealing solid layer 3c may be provided as shown in FIG. 11. The concealing solid layer 3c is layered on the base layer 2 so as to cover the spaces between the heat absorbing portions 3a and the upper surfaces of the heat absorbing portions 3a, thereby imparting the intended color and adjusting the surface color. The concealing solid layer 3c is a colored layer that contains a binder resin and a colorant dispersed in the binder resin. The binder resin and colorant can be selected appropriately from the same materials as those used for the design layer 3.

[0088] The concealing solid layer 3c is, for example, a printed layer, and can be formed using the same printing method as for the pattern layer 3. Conventional coating methods, such as gravure coating, roll coating, and spray coating, can also be used. The ink composition (coating liquid) used to form the concealing solid layer 3c is made of a material that has lower infrared absorption than the heat-absorbing portion 6, which has infrared absorption. For example, it may be a mixture of a solvent and solid components such as a colorant and a binder resin. The ink composition for the concealing solid layer may also contain other components such as a stabilizer, plasticizer, catalyst, and curing agent. The solvent, colorant, and binder resin can be selected appropriately from the same materials as those used in the printing ink for the pattern layer 3. It is preferable to print the colorant in a color that matches the pattern of the pattern layer 3 (e.g., brown for a wood grain pattern). This matching with the pattern further enhances the design of flooring and building materials. In other words, the color of the surface of the decorative sheet 1 on the surface protection layer 5 side will correspond to the color of the concealing solid layer 3c and the pattern layer 3, so by selecting the color of the concealing solid layer 3c and the pattern of the pattern layer 3 so as to conceal the color of the heat absorbing portion 6, the design of the decorative sheet 1d can be further improved.

[0089] Since the solvent eventually volatilizes, the concealing solid layer 3c is formed mainly from solid components such as colorants, binder resins, etc. The thickness of the concealing solid layer 3c may be any thickness that can conceal the heat absorbing parts 6 and form an uneven shape on the surface of the surface protection layer 5. [Example]

[0090] The present invention will be described in detail below with reference to examples and comparative examples, but the present invention is not limited to the following examples.

[0091] Example 1 A colored resin layer containing polyvinyl chloride resin as a main component, having a specific gravity of 1.2 and a thickness of 80 μm, was used as the base layer 2. The plasticizer content of the base layer 2 was 20 parts by mass with respect to 100 parts by mass of polyvinyl chloride resin. A pattern layer 3 was formed on the base layer 2 using a gravure printer, forming heat absorbing portions 3a and non-heat absorbing portions 3b. The heat absorbing portions 3a were printed using a vinyl chloride-vinyl acetate-based printing ink containing carbon black as a heat absorbing material. The non-heat absorbing portions 3b were printed using a vinyl chloride-vinyl acetate-based printing ink.

[0092] Next, a transparent resin layer mainly composed of polyvinyl chloride resin with a specific gravity of 1.2 and a thickness of 80 μm and a base layer 2 printed with heat absorbing portions 3a and non-heat absorbing portions 3b were heated and integrated by thermal lamination to obtain a laminate of the base layer 2, the design layer 3, and the transparent resin layer 4. The proportion of plasticizer in the transparent resin layer 4 was 20 parts by mass per 100 parts by mass of polyvinyl chloride resin. This laminate was heated using an infrared heater, and then embossed by pressing a matte embossing roll against it from the transparent resin layer 4 side, thereby obtaining a decorative sheet 1a without a surface protective layer 5 as shown in Figure 3 as the decorative sheet of Example 1.

[0093] Example 2 A decorative sheet of Example 2 was obtained through the same steps as in Example 1, except that the specific gravity of the transparent resin layer containing polyvinyl chloride resin as the main component of Example 1 was changed to 1.6. Example 3 A decorative sheet of Example 3 was obtained through the same steps as in Example 1, except that the thickness of the colored resin layer containing polyvinyl chloride resin as the main component of Example 1 was changed to 60 μm.

[0094] Example 4 A decorative sheet of Example 4 was obtained through the same steps as in Example 1, except that the thickness of the colored resin layer containing polyvinyl chloride resin as the main component of Example 1 was changed to 350 μm. Example 5 A decorative sheet of Example 5 was obtained through the same steps as in Example 1, except that the thickness of the transparent resin layer containing polyvinyl chloride resin as the main component in Example 1 was changed to 60 μm.

[0095] Example 6 A decorative sheet of Example 6 was obtained through the same steps as in Example 1, except that the thickness of the transparent resin layer containing polyvinyl chloride resin as the main component in Example 1 was changed to 350 μm. Example 7 The decorative sheet of Example 7 was obtained through the same process as Example 1, except that the plasticizer ratio of the colored resin layer, which is primarily composed of polyvinyl chloride resin in Example 1, was changed to 5 parts by mass per 100 parts by mass of polyvinyl chloride resin.

[0096] Example 8 The decorative sheet of Example 8 was obtained through the same process as Example 1, except that the plasticizer ratio of the colored resin layer, which is primarily composed of polyvinyl chloride resin in Example 1, was changed to 40 parts by mass per 100 parts by mass of polyvinyl chloride resin. Example 9 The decorative sheet of Example 9 was obtained through the same process as Example 1, except that the plasticizer ratio of the transparent resin layer, whose main component is polyvinyl chloride resin in Example 1, was changed to 5 parts by mass per 100 parts by mass of polyvinyl chloride resin.

[0097] Example 10 The decorative sheet of Example 10 was obtained through the same process as Example 1, except that the plasticizer ratio of the transparent resin layer, whose main component is polyvinyl chloride resin in Example 1, was changed to 40 parts by mass per 100 parts by mass of polyvinyl chloride resin. Example 11 The decorative sheet of Example 11 was obtained through the same process as Example 1, except that the specific gravity of the colored resin layer, which was primarily composed of polyvinyl chloride resin in Example 1, was changed to 1.5 and the plasticizer ratio was changed to 17 parts by mass per 100 parts by mass of polyvinyl chloride resin.

[0098] Example 12 A decorative sheet of Example 12 was obtained through the same process as in Example 11, except that the specific gravity of the colored resin layer containing polyvinyl chloride resin as the main component of Example 11 was changed to 1.6. Example 13 In Example 1, the specific gravity of the colored resin layer (substrate layer 2) mainly composed of polyvinyl chloride resin was changed to 1.5, and the plasticizer ratio was changed to 17 parts by mass per 100 parts by mass of polyvinyl chloride resin, and a pattern layer 3' without heat absorbing parts 3a was formed, and then heat absorbing parts 6 were printed by gravure printing on the surface of the substrate layer 2 opposite the pattern layer 3'. Then, the same steps as in Example 1 were carried out to obtain the decorative sheet of Example 13 (Figure 5). The heat absorbing material used was vinyl chloride-vinyl acetate printing ink containing carbon black.

[0099] Example 14 After forming the pattern layer 3 without the heat absorbing portions 3a in Example 1, the heat absorbing portions 6 were printed by gravure printing on the surface of the base layer 2 opposite the pattern layer 3'. Then, the same steps as in Example 1 were carried out to obtain the decorative sheet of Example 14 (Fig. 5). The heat absorbing material used was vinyl chloride-vinyl acetate printing ink containing carbon black. Example 15 In Example 1, the specific gravity of the base layer 2 was changed to 1.6, and the plasticizer ratio was changed to 17 parts by mass per 100 parts by mass of polyvinyl chloride resin, and a pattern layer 3' without heat absorbing parts 3a was formed, and then heat absorbing parts 6 were printed by gravure printing on the surface of the base layer 2 opposite the pattern layer 3'. Then, the same process as in Example 1 was carried out to obtain the decorative sheet of Example 15 (Figure 5). As the heat absorbing material, vinyl chloride-vinyl acetate printing ink containing carbon black was used.

[0100] Example 16 In Example 1, a heat absorbing portion 3a containing a heat absorbing agent was printed by gravure printing on the same side of the base layer 2 as the pattern layer 3, and a heat absorbing portion 6 was printed by gravure printing on the side of the base layer 2 opposite the pattern layer 3. Then, the same process as in Example 1 was carried out to obtain the decorative sheet of Example 16. As the heat absorbing material, vinyl chloride-vinyl acetate printing ink containing carbon black was used. Example 17 The decorative sheet of Example 17 was obtained through the same process as in Example 16, except that the specific gravity of the base layer 2 was changed to 1.6, the plasticizer ratio was changed to 17 parts by mass per 100 parts by mass of polyvinyl chloride resin, and the specific gravity of the transparent resin layer mainly composed of polyvinyl chloride resin was changed to 1.2. As the heat absorbing material, vinyl chloride-vinyl acetate printing ink containing carbon black was used.

[0101] Example 18 The specific gravity of the colored resin layer mainly composed of polyvinyl chloride resin in Example 1 was changed to 1.5, the proportion of plasticizer was changed to 17 parts by mass per 100 parts by mass of polyvinyl chloride resin, and tin-doped indium oxide (ITO) was used as the heat absorbing material instead of carbon black. Otherwise, the decorative sheet of Example 18 was obtained through the same process as Example 1. Example 19 The specific gravity of the colored resin layer mainly composed of polyvinyl chloride resin in Example 1 was changed to 1.5, the proportion of plasticizer was changed to 17 parts by mass per 100 parts by mass of polyvinyl chloride resin, and antimony-doped tin oxide (ATO) was used as the heat absorbing material instead of carbon black. Otherwise, the decorative sheet of Example 19 was obtained through the same process as Example 1.

[0102] Example 20 The specific gravity of the colored resin layer mainly composed of polyvinyl chloride resin in Example 1 was changed to 1.5, the proportion of plasticizer was changed to 17 parts by mass per 100 parts by mass of polyvinyl chloride resin, and lanthanum hexaboride (LaB6) was used as the heat absorbing material instead of carbon black. Otherwise, the decorative sheet of Example 20 was obtained through the same process as Example 1. Example 21 The specific gravity of the colored resin layer mainly composed of polyvinyl chloride resin in Example 1 was changed to 1.5, the proportion of plasticizer was changed to 17 parts by mass per 100 parts by mass of polyvinyl chloride resin, and cesium-doped tungsten oxide (CTO) was used as the heat absorbing material instead of carbon black. Otherwise, the decorative sheet of Example 21 was obtained through the same process as Example 1.

[0103] Example 22 The decorative sheet of Example 22 was obtained through the same process as in Example 1, except that the specific gravity of the colored resin layer containing polyvinyl chloride resin as the main component in Example 1 was changed to 1.5, the proportion of plasticizer was changed to 17 parts by mass per 100 parts by mass of polyvinyl chloride resin, and phthalocyanine blue was used as the heat absorbing material instead of carbon black.

[0104] Example 23 A colored resin layer containing polyvinyl chloride resin as a main component, having a specific gravity of 1.5 and a thickness of 80 μm, was used as the base layer 2. The plasticizer content of the base layer 2 was 17 parts by mass relative to 100 parts by mass of polyvinyl chloride resin. The heat absorbing portion 3a was printed on the base layer 2 using a gravure printing machine, and then the hiding solid ink 3c was continuously printed. The pattern layer 3 was then continuously printed using a gravure printing machine. The heat absorbing portion 3a was printed using a vinyl chloride-vinyl acetate-based printing ink containing carbon black as a heat absorbing material. The hiding solid and pattern layer 3 were printed using vinyl chloride-vinyl acetate-based printing inks. Next, a transparent resin layer having a specific gravity of 1.2, a thickness of 80 μm, and a plasticizer ratio of 20 parts by mass of polyvinyl chloride resin per 100 parts by mass of polyvinyl chloride resin as its main component, and a base layer 2 printed with a pattern layer 3, a concealing solid layer 3c, and a heat absorption portion 3a were heated and thermally laminated to form a laminate of the base layer 2, the pattern layer 3, and the transparent resin layer 4. This laminate was heated using an infrared heater, and then embossed by pressing a matte embossing roll against it from the transparent resin layer 4 side, thereby obtaining the decorative sheet of Example 23 (Figure 11 (however, the decorative sheet of Example 23 does not include a surface protective layer 5)).

[0105] Example 24 The decorative sheet of Example 24 was obtained through the same process as Example 1, except that the specific gravity of the colored resin layer, which was primarily composed of polyvinyl chloride resin in Example 1, was changed to 1.1 and the plasticizer ratio was changed to 50 parts by mass per 100 parts by mass of polyvinyl chloride resin. Example 25 The decorative sheet of Example 25 was obtained through the same process as Example 1, except that the specific gravity of the colored resin layer, which was primarily composed of polyvinyl chloride resin in Example 1, was changed to 1.8 and the plasticizer ratio was changed to 10 parts by mass per 100 parts by mass of polyvinyl chloride resin.

[0106] Example 26 The decorative sheet of Example 26 was obtained through the same process as Example 1, except that the specific gravity of the colored resin layer, which was primarily composed of polyvinyl chloride resin in Example 1, was changed to 1.5, the thickness to 50 μm, and the plasticizer ratio to 17 parts by mass per 100 parts by mass of polyvinyl chloride resin. Example 27 The decorative sheet of Example 27 was obtained through the same process as Example 1, except that the specific gravity of the colored resin layer, which was primarily composed of polyvinyl chloride resin in Example 1, was changed to 1.5, the thickness to 500 μm, and the plasticizer ratio to 17 parts by mass per 100 parts by mass of polyvinyl chloride resin.

[0107] Example 28 The decorative sheet of Example 28 was obtained through the same process as Example 14, except that the specific gravity of the colored resin layer, which was mainly composed of polyvinyl chloride resin in Example 14, was changed to 1.1 and the plasticizer ratio was changed to 50 parts by mass per 100 parts by mass of polyvinyl chloride resin. Example 29 The decorative sheet of Example 28 was obtained through the same process as Example 14, except that the specific gravity of the colored resin layer, which was primarily composed of polyvinyl chloride resin in Example 14, was changed to 1.8 and the plasticizer ratio was changed to 10 parts by mass per 100 parts by mass of polyvinyl chloride resin.

[0108] Example 30 The decorative sheet of Example 30 was obtained through the same process as Example 1, except that the specific gravity of the colored resin layer primarily composed of polyvinyl chloride resin in Example 1 was changed to 1.5, the plasticizer ratio was changed to 17 parts by mass per 100 parts by mass of polyvinyl chloride resin, and the thickness of the transparent resin layer primarily composed of polyvinyl chloride resin was changed to 50 μm. Example 31 The decorative sheet of Example 31 was obtained through the same process as Example 1, except that the specific gravity of the colored resin layer primarily composed of polyvinyl chloride resin in Example 1 was changed to 1.5, the plasticizer ratio was changed to 17 parts by mass per 100 parts by mass of polyvinyl chloride resin, and the thickness of the transparent resin layer primarily composed of polyvinyl chloride resin was changed to 500 μm.

[0109] Example 32 The decorative sheet of Example 32 was obtained through the same process as Example 1, except that the specific gravity of the colored resin layer primarily composed of polyvinyl chloride resin in Example 1 was changed to 1.5, the plasticizer ratio was changed to 17 parts by mass per 100 parts by mass of polyvinyl chloride resin, and the specific gravity of the transparent resin layer primarily composed of polyvinyl chloride resin was changed to 1.1, and the plasticizer ratio was changed to 50 parts by mass per 100 parts by mass of polyvinyl chloride resin. Example 33 The decorative sheet of Example 33 was obtained through the same process as Example 1, except that the specific gravity of the colored resin layer primarily composed of polyvinyl chloride resin in Example 1 was changed to 1.5, the plasticizer ratio was changed to 17 parts by mass per 100 parts by mass of polyvinyl chloride resin, and further the specific gravity of the transparent resin layer primarily composed of polyvinyl chloride resin was changed to 1.8, and the plasticizer ratio was changed to 10 parts by mass per 100 parts by mass of polyvinyl chloride resin.

[0110] Example 34 The decorative sheet of Example 34 was obtained through the same process as Example 14, except that the specific gravity of the colored resin layer primarily composed of polyvinyl chloride resin in Example 14 was changed to 1.5, the plasticizer ratio was changed to 17 parts by mass per 100 parts by mass of polyvinyl chloride resin, and the thickness of the transparent resin layer primarily composed of polyvinyl chloride resin was changed to 50 μm. Example 35 The decorative sheet of Example 35 was obtained through the same process as Example 14, except that the specific gravity of the colored resin layer primarily composed of polyvinyl chloride resin in Example 14 was changed to 1.5, the plasticizer ratio was changed to 17 parts by mass per 100 parts by mass of polyvinyl chloride resin, and the thickness of the transparent resin layer primarily composed of polyvinyl chloride resin was changed to 500 μm.

[0111] Example 36 The decorative sheet of Example 36 was obtained through the same process as Example 14, except that the specific gravity of the colored resin layer primarily composed of polyvinyl chloride resin in Example 14 was changed to 1.5, the plasticizer ratio was changed to 17 parts by mass per 100 parts by mass of polyvinyl chloride resin, and the specific gravity of the transparent resin layer primarily composed of polyvinyl chloride resin was changed to 1.1, and the plasticizer ratio was changed to 50 parts by mass per 100 parts by mass of polyvinyl chloride resin. Example 37 The decorative sheet of Example 37 was obtained through the same process as Example 14, except that the specific gravity of the colored resin layer primarily composed of polyvinyl chloride resin in Example 14 was changed to 1.5, the plasticizer ratio was changed to 17 parts by mass per 100 parts by mass of polyvinyl chloride resin, and the specific gravity of the transparent resin layer primarily composed of polyvinyl chloride resin was changed to 1.8, and the plasticizer ratio was changed to 10 parts by mass per 100 parts by mass of polyvinyl chloride resin.

[0112] (Comparative Example 1) In Example 11, a design layer consisting only of non-heat absorbing portions 3b was formed without providing heat absorbing portions 3a, i.e., a design layer having a predetermined design was formed using a vinyl chloride / vinyl acetate printing ink that did not contain a heat absorbing material. Furthermore, a manufacturing equipment mechanism having a mechanical embossing plate that matched the design of the design layer was used to form a concave-convex shape that matched the design of the design layer, thereby obtaining the decorative sheet of Comparative Example 1. (Comparative Example 2) In Example 11, a pattern layer consisting only of non-heat absorbing parts 3b was formed without providing heat absorbing parts 3a, and mechanical embossing was performed using a conventional embossing plate to obtain a decorative sheet of Comparative Example 2 having an uneven shape that does not match the pattern of the pattern layer. (Comparative Example 3) The decorative sheet of Comparative Example 3 was obtained in the same manner as in Example 11, except that in Example 11, a resin primarily composed of olefin resin was used as the resin forming the base layer 2 and the transparent resin layer 4 instead of a resin primarily composed of polyvinyl chloride resin. Each of the decorative sheets of Examples 1 to 37 and Comparative Examples 1 to 3 obtained by the above procedure was attached to a substrate made of polyvinyl chloride resin to obtain a decorative material for evaluation.

[0113] (evaluation) The decorative sheets and decorative materials of Examples 1 to 37 and Comparative Examples 1 to 3 were evaluated for physical properties based on five items. The evaluation items were design (synchronization), processability, productivity (yield), durability (sliding properties), and mono-materiality. The evaluation criteria for each item were as follows:

[0114] <Design> A sensory evaluation was conducted by 10 people, and the number of people who felt that the design was closest to the real thing was used to evaluate it. If 9 or more people felt that the design was close to the real thing, it was marked "◎", if 8 or more people felt that it was close to the real thing, it was marked "〇", if 6-7 people felt that it was close to the real thing, it was marked "△", and if 5 or less people felt that it was close to the real thing, it was marked "×". In this example, a grade of "△" or better was deemed to be acceptable.

[0115] <Workability> The wrapping suitability was checked as post-processability. Based on the results of the wrapping trial, cases where it could be handled in the same way as the current sheet were marked "Good", cases where it was inferior to the current sheet but still processable were marked "Good", and cases where it was not processable were marked "Poor". The current sheet here refers to the decorative sheets of Comparative Example 1 and Comparative Example 2. In this example, a grade of "△" or better was deemed to be acceptable.

[0116] <Productivity (yield)> We checked the degree of defects, such as whether there was unevenness in thickness, production volume depending on the line speed, and the time required for rewinding. The mark was "Good" if there were almost no defects and the product was comparable to the decorative sheet (current product) whose main component is polyvinyl chloride resin that is made non-synchronized using a conventional embossing plate; "Good" if there were defects that made the product inferior to the current product but did not affect production; and "Poor" if the product was producible but had defects that affected production and required ingenuity during production. In this example, a grade of "△" or better was deemed to be acceptable.

[0117] <Durability (slidability)> The sliding properties of the felt were confirmed using a crock meter. Load: 500g / cm 2 The rubbing was carried out under the above conditions, and the number of times was gradually increased in increments of 500 between 500 and 2000 times to check the sliding properties. If there was no difference in the gloss matte design after 2000 times, it was marked "Good", if there was no difference in the gloss matte design after 1000 to 1500 times, it was marked "Good", and if there was no difference in the gloss matte design after 500 times, it was marked "Poor". In this example, a grade of "△" or better was deemed to be acceptable.

[0118] <Mono-material> If the main cosmetic material is one type, it is marked as "Good", and if it is two or more types, it is marked as "Poor". The evaluation results are shown in Table 1.

[0119] [Table 1]

[0120] It was confirmed that even when a resin primarily composed of polyvinyl chloride resin was used as the base material layer 2 and the transparent resin layer 4 and embossing was performed using a heat-absorbing material, the base material layer 2 and the transparent resin layer 4 had properties equivalent to those primarily composed of olefin resin, except for their mono-material nature.

[0121] Furthermore, when the specific gravity of the base layer 2 was 1.1 or 1.8 (Examples 24, 25, 28, 29), when the specific gravity of the transparent resin layer 4 was 1.1 or 1.8 (Examples 32, 33, 36, 37), when the thickness of the base layer 2 was 0.05 mm or 0.5 mm (Examples 26, 27), when the thickness of the transparent resin layer 4 was 0.05 mm or 0.5 mm (Examples 30, 31, 34, 35), when the ratio of the plasticizer to 100 parts by mass of the polyvinyl chloride resin of the base layer 2 was 50 parts by mass or 10 parts by mass (Examples 24, 25, 28, 29), or when the polyvinyl chloride resin of the transparent resin layer 4 was 1.1 or 1.8 (Examples 32, 33, 36, 37), When the ratio of plasticizer to 100 parts by mass of resin was 50 parts by mass (Examples 32, 33, 36, and 37), one of the evaluation items was slightly reduced but within the acceptable range, and it was confirmed that good results could be obtained for all evaluation items if the specific gravity of each of the base layer 2 and the transparent resin layer 4 was within the range of 1.2 to 1.6, or the thickness was 0.06 mm to 0.35 mm, or the ratio of plasticizer to polyvinyl chloride resin was within the range of 5 to 40 parts by mass per 100 parts by mass of polyvinyl chloride resin.

[0122] In addition, it was confirmed that the same effect could be obtained when the heat absorbing material was provided in the pattern layer 3 as the heat absorbing portion 3a (Example 1) and when the heat absorbing material was provided as the heat absorbing portion 6 on the opposite side of the substrate layer 2 from the pattern layer 3 (Examples 28, 29, 34-37). It was also confirmed that the same effect could be obtained when using carbon black, tin-doped indium oxide (ITO), antimony-doped tin oxide (ATO), lanthanum hexaboride (LaB6), and cesium-doped tungsten oxide (CTO) as the heat absorbing material. It was also confirmed that the same effect could be obtained when a masking layer was provided by solid printing on the heat absorbing portion 3a (Example 23). It was also confirmed that the same effect could be obtained when phthalocyanine blue was used as the heat absorbing material (Example 22).

[0123] The present invention can have the following configurations, for example. (1) a base layer mainly composed of polyvinyl chloride resin; A decorative sheet comprising a pattern layer and a transparent resin layer mainly composed of polyvinyl chloride resin, which are laminated in this order on one surface of the base material layer, the design layer includes a heat absorbing portion formed of a predetermined material that has a higher light absorption rate for light of a predetermined wavelength than for light of other wavelengths; A decorative sheet characterized in that the decorative sheet has a synchronized embossed portion at a position on the outermost surface of the transparent resin layer side of the decorative sheet that overlaps with the heat absorption portion in a planar view, the synchronized embossed portion having a greater degree of unevenness than the degree of unevenness at a position that does not overlap with the heat absorption portion in a planar view. (2) a base layer mainly composed of polyvinyl chloride resin; a pattern layer and a transparent resin layer mainly composed of polyvinyl chloride resin, which are laminated in this order on one surface of the base layer; a heat absorbing portion laminated on the other surface of the base material layer and formed of a predetermined material that has a higher light absorption rate for light of a predetermined wavelength than for light of other wavelengths, A decorative sheet characterized in that the decorative sheet has a synchronized embossed portion on the outermost surface of the transparent resin layer side, at a position that overlaps with the heat absorption portion in a planar view, which has a greater degree of unevenness than the degree of unevenness at a position that does not overlap with the heat absorption portion in a planar view. (3) The decorative sheet according to (2) above, characterized in that the pattern layer includes a heat absorbing portion formed of a specified material that is more light absorbing for light of a specified wavelength than for light of other wavelengths. (4) the base layer and the transparent resin layer each contain a plasticizer, The decorative sheet according to any one of (1) to (3) above, characterized in that the base material layer and the transparent resin layer each satisfy at least one of the following: a specific gravity in the range of 1.2 to 1.6, a thickness in the range of 0.06 mm to 0.35 mm, and a ratio of the plasticizer to the polyvinyl chloride resin in the range of 5 to 40 parts by mass per 100 parts by mass of the polyvinyl chloride resin. (5) The decorative sheet according to any one of (1) to (4) above, characterized in that the heat absorbing portion has a higher light absorption property for light of the predetermined wavelength than the base layer and the transparent resin layer. (6) The decorative sheet according to any one of (1) to (5) above, characterized in that the predetermined material is at least one of carbon black, tin-doped indium oxide, antimony-doped tin oxide, lanthanum hexaboride, and cesium-doped tungsten oxide. (7) A base material for a cosmetic material; A decorative material comprising the decorative sheet according to any one of (1) to (6) above, provided on at least one surface of the substrate for the decorative material. [Explanation of symbols]

[0124] 1 decorative sheet 2 Base material layer 3. Picture layer 3a Heat absorption part 3b Non-heat absorbing part 3c Concealing solid layer 4 Transparent resin layer 5 Surface protective layer 5a Synchronous embossed section 5b Non-synchronized embossed section 6 Heat absorption part 8 Adhesive layer 9 Base material 10 Cosmetic materials

Claims

1. a base layer mainly composed of polyvinyl chloride resin; A decorative sheet comprising a pattern layer and a transparent resin layer mainly composed of polyvinyl chloride resin, which are laminated in this order on one surface of the base material layer, the design layer includes a heat absorbing portion formed of a predetermined material that has a higher light absorption rate for light of a predetermined wavelength than for light of other wavelengths; A decorative sheet characterized in that the decorative sheet has a synchronized embossed portion at a position on the outermost surface of the transparent resin layer side of the decorative sheet that overlaps with the heat absorption portion in a planar view, the synchronized embossed portion having a greater degree of unevenness than the degree of unevenness at a position that does not overlap with the heat absorption portion in a planar view.

2. a base layer mainly composed of polyvinyl chloride resin; a pattern layer and a transparent resin layer mainly composed of polyvinyl chloride resin, which are laminated in this order on one surface of the base layer; a heat absorbing portion laminated on the other surface of the base material layer and formed of a predetermined material that has a higher light absorption rate for light of a predetermined wavelength than for light of other wavelengths, A decorative sheet characterized in that the decorative sheet has a synchronized embossed portion on the outermost surface of the transparent resin layer side, at a position that overlaps with the heat absorption portion in a planar view, which has a greater degree of unevenness than the degree of unevenness at a position that does not overlap with the heat absorption portion in a planar view.

3. 3. The decorative sheet according to claim 2, wherein the pattern layer includes a heat absorbing portion formed of a predetermined material that is more absorptive of light of a predetermined wavelength than light of other wavelengths.

4. the base layer and the transparent resin layer each contain a plasticizer, 4. The decorative sheet according to claim 1, wherein the base layer and the transparent resin layer each satisfy at least one of the following: a specific gravity of 1.2 or more and 1.6 or less; a thickness of 0.06 mm or more and 0.35 mm or less; and a ratio of the plasticizer to the polyvinyl chloride resin of 5 parts by mass or more and 40 parts by mass or less per 100 parts by mass of the polyvinyl chloride resin.

5. 4. The decorative sheet according to claim 1, wherein the heat absorbing portion has a higher light absorption property for light of the predetermined wavelength than the base material layer and the transparent resin layer.

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

7. A base material for a cosmetic material; A decorative material comprising: a decorative sheet according to any one of claims 1 to 3 provided on at least one surface of the substrate for a decorative material.

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