Decorative sheets and decorative materials

Abstract

To provide a decorative sheet and a decorative material that can suppress a decrease in hiding power even when formed using a plant-derived material. [Solution] A decorative material 10 comprising a substrate 9 and a decorative sheet 1 laminated on at least one side of the substrate 9, wherein the decorative sheet 1 comprises a colored substrate layer 2 and a transparent resin layer 4 laminated on one side of the colored substrate layer 2, and the transparent resin layer 4 is formed using a resin composition containing a plant-derived polyolefin, and a nucleating agent has been added to the polyolefin.

Description

[Technical Field]

[0001] This invention relates to decorative sheets and decorative materials. [Background technology]

[0002] As an alternative to decorative sheets made of polyvinyl chloride, decorative sheets using olefin resins have been proposed, for example, as disclosed in Patent Document 1. [Prior art documents] [Patent Documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2014-188941 [Overview of the project] [Problems that the invention aims to solve]

[0004] In recent years, due to environmental concerns, there has been a demand to replace conventional petroleum-derived materials used in decorative sheets with plant-derived materials. However, when biomass polyethylene is used as a plant-derived material that can be used in decorative sheets, there is a problem in that its opacity is reduced.

[0005] In view of the above-mentioned problems, the present invention aims to provide a decorative sheet and decorative material that can suppress a decrease in opacity even when formed using plant-derived materials. [Means for solving the problem]

[0006] To solve the above problems, one aspect of the present invention comprises a colored substrate layer and a transparent resin layer laminated on one side of the colored substrate layer, wherein the colored substrate layer is formed using a resin composition obtained by mixing plant-derived high-density polyethylene and low-density polyethylene, and the density of the colored substrate layer is 0.98 g / cm³. 3 More than 1.10g / cm 3The decorative sheet falls within the following range. Furthermore, in order to solve the above problems, one aspect of the present invention is a decorative material comprising a base material and a decorative sheet laminated on at least one surface of the base material. [Effects of the Invention]

[0007] According to one aspect of the present invention, it is possible to provide a decorative sheet and decorative material that can suppress a decrease in opacity even when formed using plant-derived polyethylene, which is a plant-derived material. [Brief explanation of the drawing]

[0008] [Figure 1] This is a cross-sectional view showing the configuration of the decorative sheet and decorative material in the first embodiment of the present invention. [Modes for carrying out the invention]

[0009] Embodiments of this technology will be described below with reference to the drawings. In the drawings, identical or similar parts are denoted by the same or similar reference numerals, and redundant descriptions are omitted. Each drawing is schematic and may differ from reality. The embodiments shown below are illustrative examples of devices and methods for realizing the technical idea of ​​this technology, and the technical idea of ​​this technology is not limited to the devices and methods exemplified in the embodiments below. The technical idea of ​​this technology can be modified in various ways within the technical scope described in the claims. Also, the directions of "left and right" and "up and down" in the following description are merely definitions for the convenience of explanation. This does not limit the technical concept of the present invention. Therefore, for example, if the paper is rotated 90 degrees, "left and right" and "up and down" will be swapped when read, and if the paper is rotated 180 degrees, "left" will become "right" and "right" will become "left".

[0010] (First Embodiment) The composition of the decorative material 10 will be described below with reference to Figure 1. As shown in Fig. 1, the decorative material 10 includes a decorative sheet 1 and a base material 9. The specific configuration of the decorative sheet 1 will be described later. The base material 9 is formed in a plate shape using, for example, wood boards, inorganic boards, metal plates, etc., and the decorative sheet 1 is laminated on one surface (the upper surface in Fig. 1). That is, the decorative material 10 includes the base material 9 and the decorative sheet 1 laminated on one surface of the base material 9.

[0011] (Configuration of the decorative sheet) As shown in Fig. 1, the decorative sheet 1 includes a colored base material layer 2, a pattern layer 3, an adhesive layer 4, a transparent resin layer 5, a surface protection layer 6, an uneven portion 7, and a primer layer 8.

[0012] (Colored base material layer) The colored base material layer 2 is formed using a thermoplastic resin. As the thermoplastic resin for forming the colored base material layer 2, for example, a colored thermoplastic polyolefin-based resin can be used. As the polyolefin-based resin, for example, polyolefin resins such as polyethylene, polypropylene, polymethylpentene, polybutene, ethylene-propylene copolymer, ethylene-α-olefin copolymer, propylene-α-olefin copolymer, etc., and olefin-based copolymer resins such as ethylene-vinyl acetate copolymer, ethylene-vinyl alcohol copolymer, ethylene-(meth)acrylic acid (ester) copolymer, ethylene-unsaturated carboxylic acid copolymer metal neutral salt (ionomer), etc., including single or a mixture of two or more kinds, copolymer, composite, laminate, etc. can be used. Also, the colored base material layer 2 may be formed of a resin composition containing plant-derived high-density polyethylene. Further, in addition to plant-derived high-density polyethylene, the colored base material layer 2 may contain plant-derived low-density polyethylene or plant-derived linear low-density polyethylene.

[0013] In addition, as the polyolefin resin, it can be appropriately selected and used from the above-mentioned types according to the use purpose of the decorative sheet 1 and the like. In particular, for general applications, the most suitable one is a polypropylene-based resin, that is, a homopolymer or copolymer mainly composed of propylene. For example, homopolypropylene resin, random polypropylene resin, block polypropylene resin, etc. may be used alone or in appropriate combination, and it is also possible to use a resin obtained by appropriately blending atactic polypropylene. Further, it may be a copolymer containing an olefin monomer other than propylene. For example, it has a polypropylene crystal part and contains 15 mol% or more of one or more comonomers of α-olefins having 2 to 20 carbon atoms other than propylene, preferably ethylene, butene-1, 4-methylpentene-1, hexene-1 or octene-1, such as a propylene-α-olefin copolymer, can be used. In addition, it is usually possible to appropriately add a modifier such as low-density polyethylene, ethylene-α-olefin copolymer, ethylene-propylene copolymer rubber, ethylene-propylene-non-conjugated diene copolymer rubber, styrene-butadiene copolymer, or hydrogenated product, which is used for softening the polypropylene-based resin.

[0014] In addition, to the colored base material layer 2, if necessary, for example, one or more additives selected from various additives such as colorants, fillers, ultraviolet absorbers, light stabilizers, heat stabilizers, antioxidants, antistatic agents, lubricants, flame retardants, antibacterial agents, antifungal agents, antifriction agents, light scattering agents, and gloss modifiers may be added. The thickness of the colored base material layer 2 is preferably in the range of 40 [μm] or more and 150 [μm] or less, and more preferably 50 [μm] or more and 130 [μm] or less. This is because when the thickness of the colored base material layer 2 is 40 [μm] or more, it is possible to absorb irregularities and steps of the floor material or the like serving as the base, and improve the construction finish of the decorative sheet 1. Further, when the thickness of the colored base material layer 2 is 150 [μm] or less, it is not necessary to form the colored base material layer 2 thicker than necessary, and the manufacturing cost of the decorative sheet 1 can be reduced.

[0015] Further, the colored base material layer 2 has a density within a range of, for example, 0.92 [g / cm 3 or more and 1.12 [g / cm 3 or less, preferably 0.98 [g / cm 3 or more and 1.10 [g / cm 3 or less. The density of the colored base material layer 2 is a value measured according to the method specified in Method A of JIS K7112-1980 after annealing described in JIS K6760-1995. If the density of the colored base material layer 2 is 0.92 [g / cm 3 or more, it is possible to increase the rigidity of the colored base material layer 2 as compared with the case where the density is less than 0.92 [g / cm 3 . Further, if the density of the colored base material layer 2 is 1.12 [g / cm 3 or less, it is possible to increase the transparency and mechanical strength of the colored base material layer 2 as compared with the case where the density exceeds 1.12 [g / cm 3 .

[0016] <Pattern layer> The pattern layer 3 is laminated on one surface (the upper surface in FIG. 1) of the colored base material layer 2 and is a layer for adding a pattern for imparting design properties. In addition, the pattern layer 3 can be omitted when it is possible to substitute with the coloring of the colored base material layer 2. Further, the pattern layer 3 is formed using printing ink or paint or the like. The printing ink or paint or the like for forming the pattern layer 3 is formed by dissolving or dispersing a colorant such as a dye or a pigment in a suitable diluting solvent together with a suitable binder resin, for example.

[0017] The printing ink or paint or the like for forming the pattern layer 3 is applied using various printing methods such as the gravure printing method or the offset printing method, or various coating methods such as the gravure coating method or the roll coating method, for example. As the binder resin, for example, urethane resins, acrylic resins, vinyl chloride acetate resins, polyimide resins, nitrocellulose, or the like, or mixtures thereof can be used, but are not limited thereto. Any design can be used as the pattern, such as wood grain, stone pattern, fabric pattern, abstract pattern, geometric pattern, letters, symbols, solid color, or a combination thereof. In addition, to improve the opacity of the decorative sheet 1, an opacity layer may be provided between the pattern layer 3 and the colored base material layer 2. The opacity layer is formed using, for example, an opaque printing ink or paint containing a large amount of opaque pigments such as titanium dioxide or iron oxide.

[0018] The thickness of the pattern layer 3 is preferably within the range of 1 [μm] to 10 [μm]. This is because when the thickness of the pattern layer 3 is 1 [μm] or more, it is possible to make the printing clearer. Also, when the thickness of the pattern layer 3 is 10 [μm] or less, it is possible to improve the printability when manufacturing the decorative sheet 1 and to reduce manufacturing costs. Furthermore, functional additives such as extender pigments, plasticizers, dispersants, surfactants, tackifiers, adhesion aids, drying agents, curing agents, curing accelerators, and curing retarders may be added to the pattern layer 3 to impart various functions. Furthermore, the pattern layer 3 may have a configuration that includes, for example, a solid-colored base layer to conceal the color and pattern of the base to which the decorative sheet 1 is attached, and a pattern layer for adding a design to enhance aesthetic appeal.

[0019] <Adhesive layer> The adhesive layer 4 is laminated on one side of the pattern layer 3 (the upper side in Figure 1) and is used to bond the pattern layer 3 to the transparent resin layer 5. For example, the adhesive layer 4 can be made from materials such as urethane, acrylic, olefin, ethylene-vinyl acetate copolymer, vinyl chloride-vinyl acetate copolymer, or polyester.

[0020] <Transparent resin layer> The transparent resin layer 5 is laminated on one side of the adhesive layer 4 (the upper side in Figure 1) and is formed using a resin composition containing transparent, plant-derived high-density polyethylene (for example, "Green Polyethylene (SHC7260)" manufactured by Braschem). The transparent resin layer 5 may also contain plant-derived low-density polyethylene or plant-derived linear low-density polyethylene. The density of the transparent resin layer 5 is, for example, 0.92 [g / cm³]. 3 ] or more 0.99[g / cm 3 Within the following range, preferably 0.94 [g / cm³] 3 ] or more 0.98[g / cm 3 ]Within the range below, more preferably 0.95 [g / cm³] 3 ] or more 0.97[g / cm 3 It has a density within the following range:

[0021] The density of the transparent resin layer 5 is 0.92 [g / cm³] 3 If it is above 0.92 [g / cm³], the density is 0.92 [g / cm³]. 3 Compared to the case where the density is less than 0.99 [g / cm³], it is possible to increase the rigidity of the transparent resin layer 5. Also, when the density of the transparent resin layer 5 is 0.99 [g / cm³], it becomes possible to increase the rigidity of the transparent resin layer 5. 3 If the density is less than or equal to 0.99 [g / cm³], 3 Compared to cases where the value exceeds [ ], it is possible to improve the transparency and mechanical strength of the transparent resin layer 5. Furthermore, the transparent resin layer 5 has, for example, a density of 0.90 [g / cm³] 3 ] or more 0.91[g / cm 3 Plant-derived polypropylene within the following range may also be used.

[0022] The high-density polyethylene forming the transparent resin layer 5 has a nucleating agent (for example, "Rikemaster CN-002" manufactured by Riken Vitamin Co., Ltd.) added to it. The nucleating agent is added to high-density polyethylene in a concentration of 500 ppm to 2000 ppm, based on the mass of high-density polyolefin. In the first embodiment, as an example, a case will be described in which the nucleating agent is added to high-density polyethylene in a range of 1500 ppm to 2000 ppm based on the mass of high-density polyethylene.

[0023] The transparent resin layer 5 may contain, if necessary, one or more additives selected from various sources such as colorants, fillers, UV absorbers, light stabilizers, heat stabilizers, antioxidants, antistatic agents, lubricants, flame retardants, antibacterial agents, antifungal agents, friction reducers, light scattering agents, and gloss adjusters. Furthermore, it is preferable that the transparent resin layer 5 has a degree of transparency (colorless, colored, or semi-transparent) that allows the pattern of the pattern layer 3 to be seen through to the surface (top surface) of the decorative sheet 1. The thickness of the transparent resin layer 5 is, for example, within the range of 20 [μm] to 200 [μm], preferably within the range of 55 [μm] to 150 [μm], and more preferably within the range of 60 [μm] to 80 [μm].

[0024] <Surface protective layer> The surface protection layer 6 is laminated on one side of the transparent resin layer 5 (the upper side in Figure 1) and is provided to impart functions such as weather resistance, scratch resistance, stain resistance, and design properties to the decorative sheet 1. Furthermore, the surface protective layer 6 is formed using, for example, an acrylic resin composition. Furthermore, the surface protective layer 6 may contain various additives as needed, such as weather resistant agents, plasticizers, stabilizers, fillers, dispersants, colorants such as dyes and pigments, solvents, UV absorbers, heat stabilizers, light stabilizers, antiblocking agents, catalyst scavengers, colorants, light scattering agents, and gloss adjusters. In addition, the surface protective layer 6 may contain functional additives as needed, such as antiviral agents, antibacterial agents, and antifungal agents.

[0025] <Uneven part> The uneven portion 7 is formed by recesses provided in multiple locations on the transparent resin layer 5 and the surface protective layer 6.

[0026] <Primer layer> The primer layer 8 is a base layer that improves the adhesion and corrosion resistance between the colored substrate layer 2 and the substrate 9. Furthermore, the primer layer 8 is laminated on the other side of the colored substrate layer 2 (the lower side in Figure 1). Furthermore, the primer layer 8 is formed using, for example, a polyester resin, an organic additive, a pigment, etc. In the first embodiment, as an example, we will describe a case in which the primer layer 8 is formed using polyester urethane obtained by crosslinking polyester polyol with isocyanate. Furthermore, rust-preventive pigments may be added to the primer layer 8 to improve corrosion resistance. The thickness of the primer layer 8 is, for example, within the range of 1 [μm] to 10 [μm].

[0027] The first embodiment described above is merely one example of the present invention, and the present invention is not limited to the first embodiment described above. Various modifications can be made to forms other than this embodiment, as long as they do not depart from the technical spirit of the present invention, depending on the design and other factors.

[0028] (Effects of the first embodiment) The decorative sheet 1 of the first embodiment can achieve the effects described below. (1) The device comprises a colored base layer 2 and a transparent resin layer 4 laminated on one side of the colored base layer 2, wherein the transparent resin layer 4 is formed using a resin composition containing plant-derived high-density polyethylene, and a nucleating agent is added to the high-density polyethylene. Therefore, even when using a plant-derived material such as plant-derived high-density polyethylene, it is possible to form a transparent resin layer 4 with high hardness equivalent to that of a structure formed using fossil fuel-derived polyethylene. As a result, it is possible to provide a decorative sheet 1 that can suppress a decrease in surface hardness even when formed using plant-derived high-density polyethylene, which is a plant-derived material. Furthermore, even when using a plant-derived high-density polyethylene, which is a plant-derived material, it is possible to form a transparent resin layer 4 with the same high transparency as a structure formed using fossil fuel-derived polyethylene.

[0029] (2) The nucleating agent is added in a range of 500 ppm to 2000 ppm based on the mass of high-density polyethylene. As a result, it becomes possible to provide a decorative sheet 1 with less haze. (3) The nucleating agent is added in a range of 1500 ppm to 2000 ppm based on the mass of high-density polyethylene. As a result, it is possible to provide a decorative sheet 1 with less haze compared to a configuration in which the nucleating agent is added at a concentration of less than 1500 ppm based on the mass of high-density polyethylene.

[0030] Furthermore, the decorative material 10 of the first embodiment can achieve the effects described below. (4) The device comprises a base material 9 and a decorative sheet 1 laminated on at least one surface of the base material 9. As a result, it is possible to provide a decorative material 10 that can suppress a decrease in surface hardness even when formed using plant-derived high-density polyethylene, which is a plant-derived material.

[0031] <Variation> (1) In the first embodiment, the decorative material 10 is configured to include a decorative sheet 1 laminated on one side of the base material 9, but it is not limited to this. That is, the decorative material 10 may be configured to include a decorative sheet 1 laminated 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.

[0032] (Second Embodiment) The composition of the decorative material 10 will be described below with reference to Figure 1. As shown in Figure 1, the decorative material 10 comprises a decorative sheet 1 and a base material 9. Furthermore, since the configuration of the decorative material 10 in the second embodiment is the same as that of the first embodiment described above, except for the configuration of the decorative sheet 1, the explanation of the configuration other than the decorative sheet 1 will be omitted.

[0033] (Composition of decorative sheet) As shown in Figure 1, the decorative sheet 1 comprises a colored base material layer 2, a pattern layer 3, an adhesive layer 4, a transparent resin layer 5, a surface protection layer 6, an uneven surface 7, and a primer layer 8. In addition, the configuration of the decorative sheet 1 in the second embodiment is the same as that of the first embodiment described above, except for the configuration of the colored base material layer 2. Therefore, the configuration other than the colored base material layer 2 will not be explained.

[0034] <Colored base material layer> The structure of the colored substrate layer 2 is the same as that of the first embodiment described above, except that it is formed using a resin composition which is a mixture of plant-derived high-density polyethylene and low-density polyethylene. As a plant-derived high-density polyethylene, for example, "Green Polyethylene (SHC7260)" manufactured by Braschem Corporation can be used. Low-density polyethylene is, for example, polyethylene with a density of 0.94 or less. In the second embodiment, as an example, we will describe a case where the low-density polyethylene forming the colored substrate layer 2 is plant-derived low-density polyethylene.

[0035] As a low-density polyethylene derived from plants, for example, "Green Polyethylene (SPB681)" manufactured by Braschem Corporation can be used. Furthermore, the low-density polyethylene forming the colored base material layer 2 is contained in the colored base material layer 2 in an amount of 5% by mass or more and 30% by mass or less of 100% by mass of the colored base material layer 2. In the second embodiment, as an example, a case will be described in which the mixing ratio of high-density polyethylene and low-density polyethylene in the colored substrate layer 2 is within the range of 95:5 to 70:30.

[0036] The second embodiment described above is merely one example of the present invention, and the present invention is not limited to the second embodiment described above. Various modifications can be made to forms other than this embodiment, as long as they do not depart from the technical spirit of the present invention, depending on the design and other factors.

[0037] (Effects of the second embodiment) The decorative sheet 1 of the second embodiment can achieve the effects described below. (1) The colored substrate layer 2 is formed using a resin composition which is a mixture of plant-derived high-density polyethylene and low-density polyethylene. As a result, it becomes possible to provide a decorative sheet 1 that can suppress a decrease in bending suitability and a decrease in machinability. (2) The low-density polyethylene that forms the colored base material layer 2 is plant-derived low-density polyethylene. As a result, it becomes possible to reduce the burden on the environment.

[0038] (3) The low-density polyethylene that forms the colored base material layer 2 is contained in the colored base material layer 2 in an amount of 5% by mass or more and 30% by mass or less of 100% by mass of the colored base material layer 2. As a result, it becomes possible to suppress the decrease in film formation stability and strength of decorative sheet 1. In other words, if the low-density polyethylene content is too low, the film-forming stability of the decorative sheet 1 is poor, and if the low-density polyethylene content is too high, the decorative sheet 1 becomes too soft. However, this problem can be solved by ensuring that the low-density polyethylene forming the colored base layer 2 is contained in the colored base layer 2 within a range of 5% by mass to 30% by mass of the 100% mass of the colored base layer 2.

[0039] (4) The mixing ratio of high-density polyethylene to low-density polyethylene in the colored substrate layer 2 is within the range of 95:5 to 70:30. As a result, it becomes possible to suppress the decrease in film formation stability and strength of decorative sheet 1. In other words, if the low-density polyethylene content is too low, the film-forming stability of the decorative sheet 1 is poor, and if the low-density polyethylene content is too high, the decorative sheet 1 becomes too soft. However, this problem can be solved by keeping the mixing ratio of high-density polyethylene to low-density polyethylene in the colored substrate layer 2 within the range of 95:5 to 70:30.

[0040] (Third embodiment) The composition of the decorative material 10 will be described below with reference to Figure 1. As shown in Figure 1, the decorative material 10 comprises a decorative sheet 1 and a base material 9. Furthermore, since the configuration of the decorative material 10 in the second embodiment is the same as that of the first embodiment described above, except for the configuration of the decorative sheet 1, the explanation of the configuration other than the decorative sheet 1 will be omitted.

[0041] (Composition of decorative sheet) As shown in Figure 1, the decorative sheet 1 comprises a colored base material layer 2, a pattern layer 3, an adhesive layer 4, a transparent resin layer 5, a surface protection layer 6, an uneven surface 7, and a primer layer 8. Furthermore, since the configuration of the decorative sheet 1 in the third embodiment is the same as that of the second embodiment described above, except for the configuration of the transparent resin layer 5, the explanation of the configuration other than the transparent resin layer 5 will be omitted.

[0042] <Transparent resin layer> The structure of the transparent resin layer 5 is the same as that of the first embodiment described above, except that it is formed using a resin composition which is a mixture of plant-derived high-density polyethylene and plant-derived low-density polyethylene. In the third embodiment, as an example, a case in which the mixing ratio of high-density polyethylene and low-density polyethylene in the transparent resin layer 5 is within the range of 80:20 to 60:40 will be described.

[0043] It should be noted that the third embodiment described above is just one example of the present invention, and the present invention is not limited to the third embodiment described above. Various modifications can be made to forms other than this embodiment, as long as they do not depart from the technical spirit of the present invention, depending on the design and so on.

[0044] (Effects of the third embodiment) The decorative sheet 1 of the third embodiment can achieve the effects described below. (1) The transparent resin layer 5 is formed using a resin composition which is a mixture of plant-derived high-density polyethylene and plant-derived low-density polyethylene. As a result, it becomes possible to improve the flexibility and transparency of the transparent resin layer 5. (2) The mixing ratio of high-density polyethylene to low-density polyethylene in the transparent resin layer 5 is within the range of 80:20 to 60:40. As a result, it becomes possible to improve the flexibility and transparency of the transparent resin layer 5. [Examples]

[0045] The decorative materials of Examples 1 to 22 and the decorative materials of Comparative Examples 1 to 5 will be described below with reference to the first to third embodiments.

[0046] (Example 1) The colored substrate layer was formed using colored polyethylene resin with a thickness of 55 μm. The pattern layer was formed by applying corona discharge treatment to one side of the colored substrate layer, followed by the use of urethane-based printing ink. The adhesive layer was formed using a urethane-based adhesive. The transparent resin layer was formed using "Green Polyethylene," a plant-derived high-density polyethylene (HDPE) manufactured by Braschem. The nucleating agent, "Rikemaster CN-002," manufactured by Riken Vitamin Co., Ltd., was added to the "Green Polyethylene" at a concentration of 1500 ppm, based on the mass of the "Green Polyethylene." The thickness of the transparent resin layer was 70 μm.

[0047] The surface protective layer was formed primarily from an acrylic resin composition. The primer layer was formed using polyester urethane resin after corona discharge treatment was applied to one side of the colored substrate layer, with a thickness of 1 μm to 2 μm. Furthermore, by lamination, a decorative sheet of Example 1 with a thickness of 135 [μm] was formed. After forming the decorative sheet of Example 1, the decorative material of Example 1 was formed by bonding the primer layer to the substrate using "BA-10L (curing agent: BA-11B)" manufactured by Japan Coating Resin on the surface facing the substrate.

[0048] (Example 2) The decorative sheet and decorative material of Example 2 were formed in the same manner as in Example 1, except that "Rikemaster CN-002" manufactured by Riken Vitamin Co., Ltd., which is the nucleating agent, was added in an amount of 500 ppm based on the mass of high-density polyethylene. (Example 3) The decorative sheet and decorative material of Example 3 were formed in the same manner as in Example 1, except that "Rikemaster CN-002" manufactured by Riken Vitamin Co., Ltd., which is the nucleating agent, was added in an amount of 2000 ppm based on the mass of high-density polyethylene.

[0049] (Example 4) The decorative sheet and decorative material of Example 4 were formed in the same manner as in Example 1, except that the colored base layer was formed using a resin composition obtained by mixing plant-derived high-density polyethylene (HDPE) and plant-derived low-density polyethylene (LDPE) in a ratio of 95:5. (Example 5) The decorative sheet and decorative material of Example 5 were formed in the same manner as in Example 2, except that the colored base layer was formed using a resin composition obtained by mixing plant-derived high-density polyethylene (HDPE) and plant-derived low-density polyethylene (LDPE) in a ratio of 95:5.

[0050] (Example 6) The decorative sheet and decorative material of Example 6 were formed in the same manner as in Example 3, except that the colored base layer was formed using a resin composition obtained by mixing plant-derived high-density polyethylene (HDPE) and plant-derived low-density polyethylene (LDPE) in a ratio of 95:5. (Example 7) The decorative sheet and decorative material of Example 7 were formed in the same manner as in Example 1, except that the colored base layer was formed using a resin composition obtained by mixing plant-derived high-density polyethylene (HDPE) and plant-derived low-density polyethylene (LDPE) in a ratio of 70:30.

[0051] (Example 8) The decorative sheet and decorative material of Example 8 were formed in the same manner as in Example 2, except that the colored base layer was formed using a resin composition obtained by mixing plant-derived high-density polyethylene (HDPE) and plant-derived low-density polyethylene (LDPE) in a ratio of 70:30. (Example 9) The decorative sheet and decorative material of Example 9 were formed in the same manner as in Example 3, except that the colored base layer was formed using a resin composition obtained by mixing plant-derived high-density polyethylene (HDPE) and plant-derived low-density polyethylene (LDPE) in a ratio of 70:30.

[0052] (Example 10) The decorative sheet and decorative material of Example 10 were formed in the same manner as in Example 4, except that the transparent resin layer was formed using a resin composition obtained by mixing plant-derived high-density polyethylene (HDPE) and plant-derived low-density polyethylene (LDPE) in an 80:20 ratio. (Example 11) The decorative sheet and decorative material of Example 11 were formed in the same manner as in Example 5, except that the transparent resin layer was formed using a resin composition obtained by mixing plant-derived high-density polyethylene (HDPE) and plant-derived low-density polyethylene (LDPE) in an 80:20 ratio.

[0053] (Example 12) The decorative sheet and decorative material of Example 12 were formed in the same manner as in Example 6, except that the transparent resin layer was formed using a resin composition obtained by mixing plant-derived high-density polyethylene (HDPE) and plant-derived low-density polyethylene (LDPE) in an 80:20 ratio. (Example 13) The decorative sheet and decorative material of Example 13 were formed in the same manner as in Example 10, except that the colored base layer was formed using a resin composition obtained by mixing plant-derived high-density polyethylene (HDPE) and plant-derived low-density polyethylene (LDPE) in a ratio of 70:30.

[0054] (Example 14) The decorative sheet and decorative material of Example 14 were formed in the same manner as in Example 11, except that the colored base layer was formed using a resin composition obtained by mixing plant-derived high-density polyethylene (HDPE) and plant-derived low-density polyethylene (LDPE) in a ratio of 70:30. (Example 15) The decorative sheet and decorative material of Example 15 were formed in the same manner as in Example 12, except that the colored base layer was formed using a resin composition obtained by mixing plant-derived high-density polyethylene (HDPE) and plant-derived low-density polyethylene (LDPE) in a ratio of 70:30.

[0055] (Example 16) The decorative sheet and decorative material of Example 16 were formed in the same manner as in Example 10, except that the transparent resin layer was formed using a resin composition obtained by mixing plant-derived high-density polyethylene (HDPE) and plant-derived low-density polyethylene (LDPE) in a ratio of 60:40. (Example 17) The decorative sheet and decorative material of Example 17 were formed in the same manner as in Example 11, except that the transparent resin layer was formed using a resin composition obtained by mixing plant-derived high-density polyethylene (HDPE) and plant-derived low-density polyethylene (LDPE) in a ratio of 60:40.

[0056] (Example 18) The decorative sheet and decorative material of Example 18 were formed in the same manner as in Example 12, except that the transparent resin layer was formed using a resin composition obtained by mixing plant-derived high-density polyethylene (HDPE) and plant-derived low-density polyethylene (LDPE) in a ratio of 60:40. (Example 19) The decorative sheet and decorative material of Example 19 were formed in the same manner as in Example 16, except that the colored base layer was formed using a resin composition obtained by mixing plant-derived high-density polyethylene (HDPE) and plant-derived low-density polyethylene (LDPE) in a ratio of 70:30.

[0057] (Example 20) The decorative sheet and decorative material of Example 20 were formed in the same manner as in Example 17, except that the colored base layer was formed using a resin composition obtained by mixing plant-derived high-density polyethylene (HDPE) and plant-derived low-density polyethylene (LDPE) in a ratio of 70:30. (Example 21) The decorative sheet and decorative material of Example 21 were formed in the same manner as in Example 18, except that the colored base layer was formed using a resin composition obtained by mixing plant-derived high-density polyethylene (HDPE) and plant-derived low-density polyethylene (LDPE) in a ratio of 70:30. (Example 22) The decorative sheet and decorative material of Example 22 were formed in the same manner as in Example 1, except that the adhesive layer was formed using maleic anhydride-modified polyethylene resin.

[0058] (Comparative Example 1) The decorative sheet and decorative material of Comparative Example 1 were formed in the same manner as in Example 1, except that a nucleating agent was not added to the high-density polyethylene. (Comparative Example 2) The decorative sheet and decorative material of Comparative Example 2 were formed in the same manner as in Example 1, except that the transparent resin layer was formed using a polyolefin obtained by mixing plant-derived high-density polyethylene (HDPE) and plant-derived low-density polyethylene (LDPE) in a 50:50 ratio. (Comparative Example 3) The decorative sheet and decorative material of Comparative Example 3 were formed in the same manner as in Comparative Example 2, except that a nucleating agent was not added to the high-density polyethylene.

[0059] (Comparative Example 4) The decorative sheet and decorative material of Comparative Example 4 were formed in the same manner as in Example 1, except that the transparent resin layer was formed from plant-derived low-density polyethylene (LDPE). (Comparative Example 5) The decorative sheet and decorative material of Comparative Example 5 were formed in the same manner as in Example 1, except that the colored base layer was formed using a resin composition obtained by mixing plant-derived high-density polyethylene (HDPE) and plant-derived low-density polyethylene (LDPE) in a ratio of 60:40.

[0060] (Performance evaluation, evaluation results) The surface hardness, productivity, transparency, haze, bending suitability, and machinability of the decorative materials of Examples 1 to 22 and Comparative Examples 1 to 5 were evaluated, respectively. The evaluation methods used were as described below.

[0061] <Surface hardness> After conducting pencil hardness tests on the decorative material using pencils of different hardness levels, the surface hardness was evaluated by checking for damage (gouges) that occurred on the surface (surface protective layer). When damage occurred on the surface after conducting the pencil hardness test using pencils with a hardness of 2B or higher, it was evaluated as "◎". When damage occurred on the surface after conducting the pencil hardness test using pencils with a hardness of 4B or higher, it was evaluated as "○". In addition, when damage occurred on the surface after conducting the pencil hardness test using pencils with a hardness of 5B or lower, it was evaluated as "×".

[0062] <Productivity> Productivity was evaluated based on whether or not there were problems in the manufacturing of decorative sheets. A score of "◎" indicated no problems whatsoever in the manufacturing of decorative sheets, a score of "○" indicated no production issues, and a score of "×" indicated problems in the manufacturing of decorative sheets.

[0063] <Transparency> With the thickness of the transparent resin layer set to a range of 70 [μm] to 80 [μm], the total light transmittance at a wavelength of 555 [nm] was measured using a spectrophotometer (integrating sphere) to evaluate the transmittance. A total light transmittance of 85 [%] was evaluated as "◎", a total light transmittance within the range of 80 [%] to 85 [%] was evaluated as "○", and a total light transmittance of less than 80 [%] was evaluated as "×".

[0064] <Hayes> The haze [%] of the transparent resin layer was measured using an ultraviolet-visible-near-infrared spectrophotometer (Shimadzu Corporation: "UV-3600"). To measure the haze [%] of the transparent resin layer, first, resin films were formed by extruding a resin with the same composition as the transparent resin layers of the decorative sheets in Examples 1 to 22 and the decorative sheets in Comparative Examples 1 to 5, with a thickness set to within the range of 70 [μm] to 80 [μm]. Next, the haze at a wavelength of 555 nm was measured using a spectrophotometer (integrating sphere) to evaluate the haze. A haze of less than 15 [%] was evaluated as "◎", a haze within the range of 15 [%] [%] [%] [%] [%] was evaluated as "○", and a haze of 25 [%] [%] [%] was evaluated as "×".

[0065] <Suitability for bending processes> We evaluated the suitability for bending by checking the V-cutting suitability (presence or absence of whitening when bent) using decorative sheets (i.e., decorative materials) laminated to MDF (Medium Density Fiberboard). We evaluated those that did not exhibit whitening as "○" (pass), those that exhibited slight whitening as "△" (pass), and those that exhibited whitening as "×" (fail).

[0066] <Machinability> We performed cutting with a circular saw and cutting through to the MDF using a hand router on decorative sheets laminated to MDF (i.e., decorative material). We then evaluated the machinability by checking the condition of the burrs that formed on the decorative sheets. We evaluated it as "○" if no burrs formed and as "×" if burrs formed on almost the entire surface and were difficult to correct.

[0067] [Table 1]

[0068] [Table 2]

[0069] Using the method described above, various performance tests were evaluated, and the decorative materials of Examples 1 to 22 showed excellent performance in all evaluation tests. On the other hand, the decorative materials of Comparative Examples 1 to 5 were unable to show excellent performance in all evaluation tests. [Explanation of Symbols]

[0070] 1... Decorative sheet, 2... Colored base layer, 3... Pattern layer, 4... Adhesive layer, 5... Transparent resin layer, 6... Surface protection layer, 7... Uneven part, 8... Primer layer, 9... Base material, 10... Decorative material

Claims

1. A colored substrate layer to which fillers, colorants, and flame retardants are added, A transparent resin layer laminated on one side of the colored substrate layer, The system comprises a concealing layer provided between the colored substrate layer and the transparent resin layer, The aforementioned colored substrate layer is formed using a resin composition obtained by mixing plant-derived high-density polyethylene and low-density polyethylene. The transparent resin layer is formed using a resin composition containing plant-derived high-density polyethylene. The resin composition forming the transparent resin layer contains a nucleating agent. The density of the aforementioned colored substrate layer is 0.98 g / cm³. ３ 1.10g / cm or more ３ The following range: The nucleating agent is added to the decorative sheet in a range of 500 ppm or more and less than 1000 ppm, based on the mass of the high-density polyethylene.

2. The decorative sheet according to claim 1, wherein the low-density polyethylene forming the colored substrate layer is plant-derived low-density polyethylene.

3. The decorative sheet according to claim 1 or claim 2, wherein the low-density polyethylene forming the colored base material layer is contained in the colored base material layer in an amount of 5% by mass or more and 30% by mass or less of 100% by mass of the colored base material layer.

4. The decorative sheet according to any one of claims 1 to 3, wherein the mixing ratio of the high-density polyethylene and the low-density polyethylene in the colored substrate layer is in the range of 95:5 to 70:

30.

5. The decorative sheet according to any one of claims 1 to 4, wherein the transparent resin layer is formed using a resin composition obtained by mixing the plant-derived high-density polyethylene and the plant-derived low-density polyethylene.

6. The decorative sheet according to claim 5, wherein the mixing ratio of the high-density polyethylene and the low-density polyethylene in the transparent resin layer is within the range of 80:20 to 60:

40.

7. A decorative sheet according to any one of claims 1 to 6, comprising a primer layer laminated on the other side of the colored substrate layer.

8. Substrate and A decorative material comprising a decorative sheet according to any one of claims 1 to 7, laminated on at least one surface of the base material.

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