Decorative sheet

Abstract

A decorative sheet with high ink adhesion that does not use oil-based inks, which have a high environmental impact. to provide. The decorative sheet is made of a base paper and a thermoplastic resin provided on one side of the base paper. a layer containing a water-based ink and a hardener, the layer being provided on the side of the thermoplastic resin layer opposite to the base paper; Xylenediamine-based curing agents, isocyanate-based, polycarbodiimide-based curing agents, and an ink layer containing at least one di-dizine-based curing agent; and the thermoplastic resin of the ink layer. and a surface protection layer provided on the opposite side of the ink layer. The amount added is preferably 1 part by mass or more and 30 parts by mass or less per 100 parts by mass of the water-based ink. It's nice.

Description

[Technical Field]

[0001] The present disclosure relates to decorative sheets. [Background technology]

[0002] Conventionally, for example, a thermoplastic resin layer, a design layer, and a surface protection layer are formed in this order on one side of a base paper. In such decorative sheets, the printed image is For example, acrylic ink is used for the reasons of clear, beautiful printing and quick drying. It is common to print designs using oil-based inks such as ki. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2020-075442 Summary of the Invention

[0004] The present disclosure provides a decorative sheet with high ink adhesion without using oil-based ink, which has a high environmental impact. The purpose is to obtain

[0005] In order to achieve the above-mentioned object, a decorative sheet according to one aspect of the present disclosure comprises a base paper and a base material. A thermoplastic resin layer is provided on one side of the paper, and a thermoplastic resin layer is provided on the opposite side of the base paper. It is applied to the surface of the ink, and contains water-based ink, a xylenediamine-based hardener, and polycarbodiimide an ink layer containing at least one of an imide-based curing agent and an aziridine-based curing agent; and a surface protection layer provided on the surface of the layer opposite to the thermoplastic resin layer.

[0006] Furthermore, a decorative sheet according to another aspect of the present disclosure includes a base paper and a A thermoplastic resin layer and a hard ink layer are provided on the thermoplastic resin layer on the side opposite to the base paper side. As curing agents, xylenediamine-based curing agents, polycarbodiimide-based curing agents and aziridine-based curing agents are used. an ink layer containing at least one of a thermoplastic resin layer and a thermoplastic resin layer provided on the opposite side of the ink layer; and a surface protection layer formed thereon. [Effects of the Invention]

[0007] According to one aspect of the present disclosure, a decorative sheet with high ink adhesion can be produced without using oil-based ink. can be provided. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a cross-sectional view showing an example of the configuration of a decorative sheet according to an embodiment of the present disclosure. [Figure 2] FIG. 2 is a cross-sectional view showing another example of the configuration of a decorative sheet according to an embodiment of the present disclosure. [Figure 3] FIG. 3 is a cross-sectional view showing another example of the configuration of a decorative sheet according to an embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0009] An embodiment of the present disclosure will be described with reference to the drawings. The configurations shown in the drawings are schematic, and the relationship between thickness and planar dimensions, the thickness of each layer, The ratios and the like are different from the actual ones. In addition, the following embodiments are based on the technical idea of ​​the present disclosure. The technical idea of ​​the present disclosure is to provide a structure for realizing the above. The technical idea of ​​the present disclosure is not limited to the following. Various modifications may be made within the technical scope defined by the claims. This can be done.

[0010] 1. First embodiment (1.1) Basic structure of decorative sheet A decorative sheet 1 according to one embodiment of the present disclosure will now be described with reference to FIG. As shown in FIG. 1, the decorative sheet 1 comprises a base paper 11, a thermoplastic resin layer 12, and an ink layer 13. , and a surface protection layer 14. In this embodiment, the ink layer 13 is The sheet has a solid ink layer 13A and a pattern layer 13B provided on the side of the plastic resin layer 12. In the decorative sheet 1 according to one embodiment of the present disclosure, the ink layer 13 contains xylenediamine as a curing agent. At least one of an amine-based curing agent, a polycarbodiimide-based curing agent, and an aziridine-based curing agent It is made of a water-based ink containing Each layer of the decorative sheet 1 will now be described in detail.

[0011] <Original layer> In the decorative sheet 1, a base paper layer is formed by a base paper 11 and a thermoplastic resin layer 12.

[0012] (base paper) The base paper 11 is a layer that serves as the base of the decorative sheet 1. The base paper 11 may be, for example, a cell A paper reinforced with resin between the fibers can be used. Preferably, the material contains 50% by mass or more of cellulose fibers relative to the total mass of the reinforced paper. The thickness of the reinforced inter-sheet paper is preferably 15 μm or more and less than 60 μm. , 10g / m 2 More than 50g / m 2 It is preferable that the thickness of the base paper 11 is less than 100 μm. Since it can have sufficient thickness and stiffness as a base for the decorative sheet 1, The decorative sheet 1 is less likely to wrinkle, and the decorative sheet 1 can be prevented from warping or curling.

[0013] (thermoplastic resin layer) The thermoplastic resin layer 12 is a moisture-proof sheet-like material provided on one side of the base paper 11. "Moisture-proof" refers to the property of being difficult for water vapor to pass through. The thermoplastic resin layer 12 is made of a thermoplastic resin such as an olefin-based resin having a melting point of 140° C. or higher. Resins are preferred, and thermoplastic resins such as olefin resins having a melting point of 150°C or higher are more preferred. Examples of olefin resins include polypropylene (PP) and polyethylene terephthalate (PET). Polyethylene (PET), Polycarbonate (PC), Polyvinyl alcohol (PVA), Poly Examples of the thermoplastic resin layer 12 include polyvinylidene chloride (PVDF) and polyamide (PA). The resin material constituting the surface protective layer 14 is selected depending on the curing method of the resin material constituting the surface protective layer 14. It is preferable that

[0014] The ink layer 13, which will be described later, is formed using a water-based ink. When forming the thermoplastic film, the base layer printed with the water-based ink is heated to dry the water-based ink. By setting the melting point of the resin material constituting the conductive resin layer 12 to 140° C. or higher, the ink layer 13 The softening of the thermoplastic resin layer 12 during formation is suppressed, and the occurrence of warping or curling of the decorative sheet 1 is prevented. This can prevent the growth of bacteria.

[0015] The thickness of the thermoplastic resin layer 12 is 10 μm or more, and is 2 times the thickness of the base paper 11. 0% or more. 2, a sufficient moisture-proof effect can be obtained. It is preferable that the thickness of the decorative sheet 1 is 90% or less of the thickness of the decorative sheet 11. This can prevent the occurrence of curling.

[0016] The interlaminar strength between the base paper 11 and the thermoplastic resin layer 12 is preferably 1.1 N / cm or more. This makes it possible to make the thermoplastic resin layer 12 less likely to peel off from the base paper 11. An ink layer 13 made of water-based ink for printing is formed directly on the thermoplastic resin layer 12. Therefore, the surface of the thermoplastic resin layer 12 on which the ink layer 13 is to be formed is provided with a layer having improved wettability. As a treatment for improving wettability, for example, corona treatment may be performed. Examples include: The thermoplastic resin layer 12 contains an ultraviolet absorber and a light stabilizer to prevent weathering deterioration. It is preferable that the thermoplastic resin layer 12 contains at least one of the above. The above various additives may be appropriately contained.

[0017] <Ink layer> As described above, the ink layer 13 is formed by the solid ink layer 1 provided on the thermoplastic resin layer 12 side. 3A and a picture layer 13B.

[0018] (Solid ink layer) The solid ink layer 13A is a layer for imparting color to the entire decorative sheet 1. The layer 13A is formed on the thermoplastic resin layer 12 on the side opposite to the base paper 11, i.e., on the thermoplastic resin layer The solid ink layer 13A is formed on the surface of the base paper 12 opposite to the base paper 11. 12 is covered with a desired base color to ensure concealment for the surface to which the decorative sheet 1 is attached. is granted.

[0019] In this embodiment, the solid ink layer 13A is formed of a water-based ink. The adhesive layer includes, for example, a polyurethane resin and an aqueous crosslinking agent. The adhesive is made of a polyol component partially modified with an acid terminal and a polyisocyanate component. The adhesive may include a two-component curing urethane-based solventless adhesive containing a polyisocyanate component. The polyisocyanate component may be, for example, a mixture of an aliphatic polyisocyanate and an aromatic polyisocyanate. Water-based inks do not contain volatile organic compounds (VOCs), making them suitable for use in production sites. This improves the environment and eliminates problems caused by residual organic solvents in the decorative sheet 1.

[0020] The solid ink layer 13A contains a xylenediamine-based hardener and a polycarbodiamine-based hardener as hardeners. Contains at least one of an imide-based hardener and an aziridine-based hardener. When an isocyanate-based hardener is mixed with water-based ink, the isocyanate-based hardener reacts with water, which is the solvent in the water-based ink, causing the ink to gel, resulting in the solid ink layer 13 Therefore, the solid ink layer A of this embodiment using a water-based ink cannot be formed. The solid ink layer 13A must contain the above-mentioned hardener. Examples of printing methods that can be used include gravure printing and flexographic printing.

[0021] The amount of the hardener added to the solid ink layer 13A is 100 parts by mass of the water-based ink. The amount is preferably 1 part by mass or more and 30 parts by mass or less, and more preferably 3 parts by mass or more and 10 parts by mass or less. When the curing agent is added to the water-based ink in this range, the solid ink The ink adhesion of the ink layer 13A to the thermoplastic resin layer 12 is improved.

[0022] (Picture layer) The pattern layer 13B is a layer for imparting design features to the decorative sheet 1. The pattern layer 13B is formed on the solid ink layer 13A as a base, and is printed with a picture pattern. The pattern layer 13B is a layer in which xylenediaminetetraacetic acid is used as a hardener, similar to the solid ink layer 13A. At least one of an amine-based curing agent, a polycarbodiimide-based curing agent, and an aziridine-based curing agent It is formed from a water-based ink containing Any pattern can be used as the pattern of the pattern layer 13B, for example, a wood grain pattern, a stone pattern, or the like. Use of patterns, fabric patterns, cork patterns, abstract patterns, etc., or a combination of two or more of these. can.

[0023] <Surface protective layer> The surface protective layer 14 is a layer for protecting the surface of the decorative sheet 1 and is used to protect the ink layer 13 from heat. It is provided on the surface opposite to the plastic resin layer 12 . The material for the surface protective layer 14 is not particularly limited, and may be any of the materials used for the surface protective layer in conventional decorative sheets. For example, the surface protection layer 14 may be made of the same material as that used in the prior art. Thermosetting resins and ionizing radiation curable resins can be used, and aqueous resins are preferred. Thermosetting resins include urethane resins, acrylic resins, and unsaturated polyester resins. Fat, diallyl phthalate resin, phenolic resin, epoxy resin, melamine resin, Examples of the ionizing radiation curable resin include urea-based resins and silicone-based resins. For example, (meta) polymers that undergo crosslinking reactions when exposed to ionizing radiation such as electron beams or ultraviolet rays. Prepolymers, oligomers and monomers having polymerizable unsaturated bonds such as acryloyl groups A composition containing at least one of them as a main component can be used.

[0024] When the surface protective layer 14 is a thermosetting resin, the surface protective layer 14 is At least one of silylenediamine-based curing agents, polycarbodiimide-based curing agents and aziridine-based curing agents It is preferable that the surface protective layer 14 contains one of these curing agents. The hardness of the oil can be increased, and the solvent resistance and scratch resistance of the surface protective layer 14 can be improved. The hardener added to the surface protective layer 14 and the hardener added to the ink layer 13 can be The combination may be any combination. The surface protective layer 14 may be a single layer or a multi-layer of two or three layers. By applying resin and gloss resin separately, it is possible to give a gloss matte appearance.

[0025] (1.2) Other configurations of decorative sheets (1.2.1) Other configuration example 1 In the above-described embodiment, the ink layer 13 includes a solid ink layer 13A and a design layer 13B. For example, as shown in FIG. 2, the ink layer 13 is The ink layer 13A may be omitted.

[0026] (1.2.2) Other configuration example 2 In the above-described embodiment, an example in which no treatment is performed on the surface of the surface protection layer 14 is shown. The decorative sheet 1 is provided with a surface protective layer 14A that has been surface-modified instead of the surface protective layer 14. For example, when forming the surface protection layer 14A, a resin material is applied and then ionizing radiation of a predetermined wavelength is emitted. After the radiation is irradiated onto the resin material, the resin material may be cured. As described above, the surface protective layer 14A can be formed by modifying the surface to have an uneven shape. . The shorter the wavelength and the stronger the energy of the ionizing radiation irradiated onto the resin material, the more likely it is that the organic matter will be decomposed. It is preferable because it breaks molecular bonds and easily causes surface shrinkage. It is preferable to use vacuum ultraviolet light (VUV) of 100 nm or less, Specifically, it is preferable to use ionizing radiation with a central wavelength of 172 nm.

[0027] (1.3) Effects of this embodiment The decorative sheet 1 according to this embodiment has the following effects. (1) The decorative sheet according to this embodiment is made of a base paper and a thermoplastic resin layer provided on one side of the base paper. A resin layer is provided on the surface opposite to the base paper of the thermoplastic resin layer, and contains water-based ink and a hardener. Xylenediamine-based hardeners, polycarbodiimide-based hardeners, and aziridine-based hardeners an ink layer including at least one of the thermoplastic resin layers and a surface provided on the opposite side of the ink layer and a protective layer. This allows for the creation of decorative sheets with high ink adhesion, without using oil-based inks, which have a high environmental impact. A decorative sheet can be obtained that can suppress warping and curling of the sheet.

[0028] (2) In the decorative sheet according to this embodiment, the ink layer is composed of a picture layer and a solid ink layer. It is preferable to have at least one of them. Both the design layer and the solid ink layer use a xylenediamine-based hardener and polycarbonate. Formed with a water-based ink containing at least one of a rubodimide-based hardener and an aziridine-based hardener. This allows the design layer and the solid ink layer to be suitably formed without gelling.

[0029] (3) In the decorative sheet according to this embodiment, the amount of curing agent added in the ink layer is It is preferable that the amount is 1 part by mass or more and 30 parts by mass or less per 100 parts by mass of ink. This improves the ink adhesion of the ink layer to the thermoplastic resin layer.

[0030] (4) In the decorative sheet according to this embodiment, the surface protective layer is made of a thermosetting resin that is an aqueous resin. , xylenediamine-based curing agents, polycarbodiimide-based curing agents, and aziridine-based curing agents It is preferred that the composition includes at least one of the following: This increases the hardness of the resin, improving the solvent resistance and scratch resistance of the surface protection layer. It can be improved.

[0031] (5) In the decorative sheet according to this embodiment, the surface protective layer is made of an ionizing radiation curable water-based resin. It is preferred that the mold resin is included. This increases the hardness of the resin, improving the solvent resistance and scratch resistance of the surface protection layer. It can be improved.

[0032] (6) In the decorative sheet according to this embodiment, the thermoplastic resin layer is a thermoplastic resin having a melting point of 140°C or higher. It is preferably made of a plastic resin. This allows the thermoplastic resin layer to withstand the heat applied when forming the ink layer using water-based ink. It does not soften and prevents the decorative sheet from warping or curling.

[0033] (7) In the decorative sheet according to this embodiment, the thermoplastic resin layer contains an ultraviolet absorber and a light stabilizer. It is preferable to include at least one of them. This improves the weather resistance of the base layer, preventing the ink layer from deteriorating due to deterioration of the base layer. Peeling can be suppressed. [Example]

[0034] The present disclosure will be described in more detail below with reference to examples, but the present disclosure is not limited to these examples. It is not something that is done.

[0035] Example 1 One side of the base paper (Tenma Special Paper Co., Ltd. HPN29) is coated with ultraviolet absorber (UVA) and Polypropylene (PP) with a melting point of 165°C containing HALS and light stabilizers is melt extruded. The thermoplastic resin layer was formed by laminating the layers in this manner and curing them. The thickness of the thermoplastic resin layer after curing was , 20 μm. As a result, a base paper layer in which the base paper and the thermoplastic resin layer were laminated was formed. The interlaminar strength between the base paper and the thermoplastic resin layer was measured and found to be 1.2 N / cm. The interlayer strength was measured by fixing the base paper side of the raw fabric layer to MDF (medium density fiberboard) with double-sided tape. Then, reinforce the thermoplastic resin layer with 25mm wide cellophane tape to prevent it from being cut, then The interlaminar strength was measured using a Dossel type tensile tester. The measurement conditions were a tension speed of 200 The speed was set to mm / min and the measurement width (width of the test piece) was set to 25 mm.

[0036] Next, a water-based ink (LTW2 manufactured by Liochem) was applied to the surface of the thermoplastic resin layer of the raw fabric. The solid ink layer was formed by water-based gravure printing using 05). The water-based ink contained a hardener and Then, 6 parts by mass of xylylenediamine curing agent was added to 100 parts by mass of water-based ink, and diluted with water. After the ink was separated and gravure printed, it was dried to form a solid ink layer. The image is printed with a water-based ink containing the same xylenediamine hardener as the layer, and then dried. A picture layer was formed. As a result, an ink layer including a solid ink layer and a picture layer was formed.

[0037] Next, the entire surface of the design layer is coated with a water-based paint containing xylylenediamine hardener. A thermosetting resin (LW163 manufactured by Liochem) was applied. The thermosetting resin is cured at room temperature for 24 hours to allow the hardener added to the resin to react and harden. The surface protective layer was formed by curing the adhesive layer, thereby forming the decorative sheet of Example 1.

[0038] <Example 2> The thermoplastic resin layer of the raw material layer is replaced with polyethylene terephthalate with a melting point of 255°C instead of polypropylene. A decorative sheet of Example 2 was prepared in the same manner as in Example 1, except that phthalate (PET) was used. The interlaminar strength between the base paper and the thermoplastic resin layer was 0.6 N / cm.

[0039] Example 3 The hardener added to the ink layer and the surface protection layer is replaced with a xylenediamine hardener. A decorative sheet of Example 3 was prepared in the same manner as in Example 1, except that a carbodiimide-based curing agent was used. did.

[0040] Example 4 The curing agent added to the ink layer and the surface protective layer is azide instead of xylenediamine. A decorative sheet of Example 4 was formed in the same manner as in Example 1, except that a lysine-based curing agent was used.

[0041] <Example 5> A decorative sheet of Example 5 was formed in the same manner as in Example 1, except that the ink layer was changed to only a picture layer. did.

[0042] Example 6 The ink layer is the design layer only, and the hardener added to the design layer and the surface protection layer is xylenediamine. The same procedure as in Example 1 was carried out except that a polycarbodiimide-based curing agent was used instead of the amine curing agent. The decorative sheet of Example 6 was formed.

[0043] Example 7 The ink layer is the design layer only, and the hardener added to the design layer and the surface protection layer is xylenediamine. Example 7 was prepared in the same manner as in Example 1, except that an aziridine-based curing agent was used instead of the amine curing agent. A decorative sheet was formed.

[0044] Example 8 No ultraviolet absorber (UVA) or light stabilizer (HALS) is added to the thermoplastic resin of the base layer. A decorative sheet of Example 8 was produced in the same manner as in Example 1, except that no adhesive was used.

[0045] Example 9 The cosmetic coating of Example 9 was prepared in the same manner as in Example 1, except that no hardener was added to the surface protective layer. A sheet was produced.

[0046] Example 10 The amount of xylylenediamine hardener added to the water-based ink of the solid ink layer and the picture layer is 1 A decorative sheet of Example 10 was produced in the same manner as in Example 1, except that the amount was changed to parts by mass.

[0047] Example 11 The amount of xylylenediamine hardener added to the water-based ink of the solid ink layer and the picture layer is 1 A decorative sheet of Example 11 was produced in the same manner as in Example 1, except that the amount was set to 0 parts by mass.

[0048] Example 12 The amount of xylylenediamine hardener added to the water-based ink of the solid ink layer and the picture layer is 3 A decorative sheet of Example 12 was produced in the same manner as in Example 1, except that the amount was set to 0 parts by mass.

[0049] Example 13 The thermoplastic resin layer of the raw material layer is replaced with a medium density polyethylene with a melting point of 135°C instead of polypropylene. The decorative sheet of Example 13 was prepared in the same manner as in Example 1, except that it was prepared using polyethylene (PE). did.

[0050] Example 14 For the surface protection layer, electron beam curable resin without adding a curing agent is used instead of thermosetting resin. , After applying electron beam curing resin to the entire surface of the pattern layer, the electron beam is irradiated to cure the resin. The chemical composition of Example 14 was prepared in the same manner as in Example 1 except for the above, and the surface protective layer was formed. A decorative sheet was formed.

[0051] <Comparative Example 1> A hardener is added to the water-based ink of the solid ink layer and the picture layer, and the water-based resin of the surface protection layer. A decorative sheet of Comparative Example 1 was formed in the same manner as in Example 1, except that no adhesive was added.

[0052] <Comparative Example 2> A hardener added to the water-based ink of the solid ink layer and the picture layer, and the water-based resin of the surface protection layer. The same procedure as in Example 1 was carried out except that the xylenediamine curing agent was replaced with an isocyanate curing agent. In this manner, a decorative sheet of Comparative Example 2 was formed.

[0053] [evaluation] The decorative sheets obtained in Examples 1 to 14 and Comparative Examples 1 and 2 were evaluated as follows. provided.

[0054] [Ink adhesion evaluation] The ink adhesion of the decorative sheets obtained in Examples 1 to 14 and Comparative Examples 1 and 2 was evaluated. For each sheet, remove the surface protective layer with an eraser and then use cellophane tape. The cellophane tape was applied and then vigorously peeled off at a 90° angle. Evaluation was based on the following three levels: and A: When the ink layer has not been peeled off by cellophane tape B: When the ink layer did not peel off with cellophane tape, but the base paper was torn C: When the ink layer-base layer interface is peeled off by cellophane tape

[0055] [Curling evaluation] The curling of the decorative sheet due to the formation of the ink layer was evaluated. The decorative sheets obtained in Examples 1 to 14 and Comparative Examples 1 and 2 were cut into 10 cm x 10 cm pieces. The sample was then placed on a flat surface at 25°C and 50% RH. The sample was left to stand for 48 hours. After that, the distances between the four corners of the sample and the flat surface were measured and the average was calculated. The evaluation criteria were based on the following three levels. A: The average distance between the four corners of the sample and the plane is 3 cm or less B: The average distance between the four corners of the sample and the plane is more than 3 cm and less than 5 cm C: The average distance between the four corners of the sample and the plane is more than 5 cm.

[0056] [Scratch resistance evaluation] The decorative sheets obtained in Examples 1 to 14 and Comparative Examples 1 and 2 were tested in accordance with the European standard "EN 16094." Scratch resistance tests were conducted in accordance with Class 32 of the MS. Using the test results 1 to 5 for the R-A3 and MSR-B3 tests, The evaluation was done on the following three levels. A: If the rating is 4 or higher B: If the rating is 3 C: If the rating is 2 or less

[0057] The evaluation results are shown in Table 1 below.

[0058] [Table 1]

[0059] As shown in Table 1, the ink layer is made of water-based ink, or the ink layer is made of water-based ink and surface protection. The protective layer is made of a thermosetting resin (thermosetting aqueous resin) with a xylenediamine-based hardener. The decorative sheets of the examples containing a polycarbodiimide-based curing agent or an aziridine-based curing agent were The ink layer and the surface protective layer were compared with the decorative sheets of the comparative examples that did not contain the above-mentioned curing agent. In Comparative Example 1, in which no hardener was added to the ink layer or the surface protection layer, In the case of water-based ink, the ink adhesion and scratch resistance were both reduced. In Comparative Example 2, in which an isocyanate-based curing agent was mixed, the isocyanate-based curing agent was The ink reacts with the water in the ink and gels, making it impossible to form an ink layer. It was.

[0060] In addition, the thermoplastic resin layer is formed from a thermoplastic resin having a melting point of 140°C or higher. The decorative sheets of Examples 1 to 12 and 14 are made of a thermoplastic resin having a melting point of less than 140°C. The curling resistance of the decorative sheet was improved compared to the decorative sheet of Example 13. When using water-based ink, heat is applied to the sheet to dry the ink. If the melting point of the thermoplastic resin is above a certain temperature, the thermoplastic resin layer will not soften even if heat is applied to it. A decorative sheet without any curvature or warpage was obtained.

[0061] Furthermore, the ink layer may contain a xylenediamine-based hardener, a polycarbodiimide-based hardener, or an When the amount of di-di-lysine curing agent added is 1 part by mass or more and 30 parts by mass or less, the ink adhesion is improved. When the amount is 3 parts by mass or more and 10 parts by mass or less, there is no peeling of the ink layer and ink adhesion is improved. did.

[0062] The decorative sheet of the present disclosure is not limited to the above-described embodiments and examples. Various modifications are possible within the scope of the invention without departing from its characteristics. [Explanation of symbols]

[0063] 1 decorative sheet 11 Base paper 12 Thermoplastic resin layer 13 Ink layer 13A Solid ink layer 13B Picture layer 14 Surface protective layer 14A Surface protective layer

Claims

1. The base paper and a thermoplastic resin layer provided on one side of the base paper; a thermoplastic resin layer on the surface opposite to the base paper, Xylenediamine-based hardeners, polycarbodiimide-based hardeners, and aziridine-based hardeners an ink layer including at least one ink layer; a surface protection layer provided on the surface of the ink layer opposite to the thermoplastic resin layer; A decorative sheet comprising:

2. The ink layer includes at least one of a design layer and a solid ink layer. The decorative sheet according to claim 1 .

3. The amount of the curing agent added to the ink layer is 100 parts by mass of the water-based ink. parts by mass or more and 30 parts by mass or less The decorative sheet according to claim 1 .

4. The amount of the curing agent added in the ink layer is 3 parts by mass relative to 100 parts by mass of the water-based ink. parts by mass or more and 10 parts by mass or less The decorative sheet according to claim 3.

5. The surface protection layer is made of a thermosetting resin that is an aqueous resin, the xylenediamine-based curing agent, At least one of the polycarbodiimide-based curing agent and the aziridine-based curing agent is included. The decorative sheet according to claim 1 .

6. The surface protective layer contains an ionizing radiation curable resin that is a water-based resin. The decorative sheet according to claim 1 .

7. The thermoplastic resin layer is formed from a thermoplastic resin having a melting point of 140° C. or higher. The decorative sheet according to claim 1 .

8. The thermoplastic resin layer is an olefin-based resin. The decorative sheet according to claim 7.

9. The olefin-based resins include polypropylene (PP), polyethylene terephthalate (P ET), polycarbonate (PC), polyvinyl alcohol (PVA), polyvinyl chloride Polyvinyl chloride (PVDF) and polyamide (PA) The decorative sheet according to claim 8.

10. The thermoplastic resin layer contains at least one of an ultraviolet absorber and a light stabilizer. The decorative sheet according to any one of claims 7 to 9.

11. The base paper and a thermoplastic resin layer provided on one side of the base paper; A water-based ink and a hardener are provided on the thermoplastic resin layer on the side opposite to the base paper side. In addition, the use of xylenediamine-based curing agents, polycarbodiimide-based curing agents, and aziridine-based curing agents is limited. an ink layer including at least one ink layer; a surface protection layer provided on the ink layer opposite to the thermoplastic resin layer; A decorative sheet comprising:

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