Decorative sheet and decorative board

Abstract

To provide a decorative sheet and a decorative board that contain an antiviral agent on their surfaces and are less likely to damage objects that come into contact with the surfaces.SOLUTION: A decorative sheet 10 comprises a base layer 1, a pattern layer 2 provided on the upper side UP of the base layer 1, an antiviral agent 31, a large-diameter additive 32, and a surface protective layer 3 provided on the upper side UP of the pattern layer 2, wherein the average particle diameter of the large-diameter additive 32 is larger than the average particle diameter of the antiviral agent 31. A decorative board 100 comprises the decorative sheet 10 and a substrate 20 provided on the lower side LO of the decorative sheet 10.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a decorative sheet and a decorative board. [Background technology]

[0002] Conventionally, there are decorative sheets used for the surface decoration of interior materials and fittings for buildings such as houses, building materials such as fittings, furniture and fixtures, housing equipment, home appliances, etc., and decorative boards in which a wooden substrate or the like is attached to a decorative sheet. Some of these decorative sheets or boards have an antiviral agent added thereto, making them antiviral.

[0003] An example of a decorative sheet having antiviral properties is the antiviral decorative sheet described in Patent Document 1. The antiviral decorative sheet described in Patent Document 1 has an antiviral layer on its surface to which an antiviral agent containing silver-containing inorganic particles has been added. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent Publication No. 2022-138580 Summary of the Invention [Problem to be solved by the invention]

[0005] However, decorative sheets having a layer on their surface to which an antiviral agent which is inorganic particles or an antiviral agent carried by inorganic particles has been added, such as the antiviral decorative sheet described in Patent Document 1, have the risk that when an object comes into contact with the surface of the decorative sheet, the object in contact will be scraped off by the antiviral agent.

[0006] For example, when processing a decorative sheet to which an antiviral agent containing inorganic particles has been added, the antiviral agent may scrape off the surface of the processing equipment (e.g., a guide roll for conveying) that comes into contact with the surface of the decorative sheet during processing, and the scraped off powder may adhere to the decorative sheet or the processing equipment.

[0007] In addition, if the surface of the decorative sheet is continuously touched with the hand, fingerprints may be scraped off. Furthermore, when two decorative sheets are transported in a stacked state with the surfaces facing each other in the thickness direction, the surfaces of the two decorative sheets may rub against each other and be scraped off, causing scratches on the surface of the decorative sheet.

[0008] In light of the above circumstances, an object of the present invention is to provide a decorative sheet and decorative board that contain an antiviral agent on the surface and are less likely to damage objects that come into contact with the surface. [Means for solving the problem]

[0009] In order to solve the above problems, the present invention proposes the following means. The decorative sheet of the present invention has an original fabric layer, a pattern layer provided on the upper side of the original fabric layer, an antiviral agent, and a large particle size additive, and is provided with a surface protective layer provided on the upper side of the pattern layer, wherein the average particle size of the large particle size additive is larger than the average particle size of the antiviral agent.

[0010] In the decorative sheet, the average particle size of the large particle size additive may be at least twice the average particle size of the antiviral agent.

[0011] In the decorative sheet, a protruding height of the large particle diameter additive on the surface of the surface protective layer may be greater than a protruding height of the antiviral agent.

[0012] In the decorative sheet, the hardness of the large particle size additive may be lower than the hardness of the antiviral agent.

[0013] In the decorative sheet, the antiviral agent may include finely divided silver.

[0014] In the decorative sheet, the large particle size additive may include synthetic resin beads.

[0015] In the decorative sheet, the synthetic resin beads may be acrylic resin beads.

[0016] In the decorative sheet, the surface protective layer may contain an ionizing radiation curable resin.

[0017] The decorative board of the present invention comprises any one of the decorative sheets described above and a substrate provided below the decorative sheet. Effect of the Invention

[0018] According to the decorative sheet and decorative board of the present invention, it is possible to provide a decorative sheet and decorative board that contains an antiviral agent on the surface and is less likely to damage objects that come into contact with the surface. [Brief description of the drawings]

[0019] [Figure 1] 1 is a cross-sectional view showing a schematic diagram of a decorative board according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a cross-sectional view showing a schematic view of the surface of the decorative sheet according to the present embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] An embodiment of the present invention will be described with reference to the drawings.

[0021] FIG. 1 is a cross-sectional view that illustrates a decorative board 100 according to this embodiment. In this embodiment, as shown in Figure 1, the thickness direction of the decorative board 100 is defined as the "vertical direction V", the side of the decorative board 100 on which the substrate 20 is provided is defined as the "lower side LO" in the vertical direction V, and the side opposite the lower side LO is defined as the "upper side UP" in the vertical direction V.

[0022] The decorative board 100 comprises a decorative sheet 10 and a substrate 20 . The substrate 20 is a layer provided on the lower side LO of the decorative sheet 10. Particle board, medium density fiberboard (MDF), or the like can be used as the substrate 20. Alternatively, the substrate 20 may be a metal plate-like member such as aluminum or stainless steel, or a composite plate in which a metal such as aluminum is attached to both sides of a core material made of resin such as polyethylene.

[0023] The decorative sheet 10 comprises an original fabric layer 1, a pattern layer 2, and a surface protective layer 3. The raw fabric layer 1 is a layer provided on the upper side UP of the substrate 20 in the decorative board 100. The raw fabric layer 1 is a sheet-like layer made of a known material on which printing can be performed. As the raw fabric layer 1, a fibrous sheet such as tissue paper or titanium paper can be used.

[0024] Also, resin-impregnated paper, resin-mixed paper, inter-paper reinforced paper, bleached or unbleached kraft paper, linter paper, wood-free paper, coated paper, inorganic paper, flame-retardant paper, paperboard, Japanese paper, etc. may be used as the raw fabric layer 1. Resin sheets such as polyethylene, polypropylene, or polyvinyl chloride, woven fabric, nonwoven fabric, etc. may also be used as the raw fabric layer 1.

[0025] The pattern layer 2 is a layer provided on the upper side UP of the raw fabric layer 1. The pattern layer 2 is formed by printing a pattern such as wood grain, stone grain, or sand grain on the upper side UP of the raw fabric layer 1. The printing method for the pattern layer 2 can be a known printing method such as gravure printing, offset printing, flexographic printing, silk screen printing, or inkjet printing. For the pattern layer 2, a known printing ink suitable for the printing method to be adopted can be used.

[0026] The surface protective layer 3 is a layer provided on the upper side UP of the pattern layer 2. A thermosetting resin, an ionizing radiation curable resin, an ultraviolet curable resin, or a mixture thereof can be used as the surface protective layer 3. It is preferable to use an ionizing radiation curable resin for the surface protective layer 3. In addition, it is preferable to use a transparent or semi-transparent material for the surface protective layer 3 so that the design of the pattern layer 2 can be seen through it.

[0027] The surface protective layer 3 includes an antiviral agent 31 and a large particle diameter additive 32. The surface protective layer 3 includes a plurality of antiviral agents 31 and a plurality of large particle diameter additives 32, as shown in FIG.

[0028] The antiviral agent 31 has antiviral properties because it contains an antiviral agent that is an inorganic particle (antiviral additive) or an antiviral agent supported on inorganic particles. The antiviral agent 31 desirably contains finely ground silver.

[0029] Since the antiviral agent 31 has antiviral properties, the decorative sheet 10 and the decorative board 100 have antiviral properties. The surface protective layer 3 is provided on the surface (upper UP surface) of the decorative sheet 10 and the decorative board 100. Therefore, the decorative sheet 10 and the decorative board 100 have antiviral properties on the surface of the decorative sheet 10 and the decorative board 100.

[0030] The large particle size additive 32 is a filler (additive) added to the resin (e.g., ionizing radiation curable resin) that forms the surface protective layer 3. The large particle size additive 32 preferably contains synthetic resin beads. Moreover, the synthetic resin beads contained in the large particle size additive 32 are preferably acrylic resin beads.

[0031] The surface protection layer 3 is formed, for example, by laminating an ionizing radiation curable resin to which an antiviral agent 31 containing finely ground silver and large particle diameter additives 32 which are acrylic resin beads are added on the upper side UP of the pattern layer 2.

[0032] A known printing method such as gravure printing, offset printing, flexographic printing, silk screen printing, inkjet printing, etc. can be used as a method for laminating the surface protective layer 3. The surface protective layer 3 may also be laminated using a known coating device.

[0033] FIG. 2 is a cross-sectional view that typically shows the surface of the decorative sheet 10 according to this embodiment. The average particle size R2 of the large particle size additive 32 is larger than the average particle size R1 of the antiviral agent 31. The average particle size R2 of the large particle size additive 32 is desirably twice the average particle size R1 of the antiviral agent 31 or more.

[0034] Since the average particle size R2 of the large particle size additives 32 is larger than the average particle size R1 of the antiviral agent 31, the large particle size additives 32 protrude upward UP from the antiviral agent 31 on the surface 3s of the surface protective layer 3, as shown in Fig. 2. Here, the surface 3s of the surface protective layer 3 indicates the surface of the upper UP of the surface protective layer 3.

[0035] On the surface 3s of the surface protective layer 3, the protruding height (protruding amount) H2 of the large particle size additive 32 is greater than the protruding height H1 of the antiviral agent 31. Therefore, when an object comes into contact with the decorative sheet 10 from the upper side UP, the large particle size additive 32 comes into contact with the object on the surface of the decorative sheet 10, making it difficult for the antiviral agent 31 to come into contact with the object.

[0036] Since the antiviral agent 31 contains inorganic particles such as finely pulverized silver, when the antiviral agent 31 comes into contact with an object, there is a risk that the contacted object will be scraped off by the antiviral agent 31.

[0037] For example, when processing the decorative sheet 10, the surface of the processing equipment (e.g., a guide roll for transport) that comes into contact with the surface of the decorative sheet 10 may be scraped off, and the scraped off powder may adhere to the decorative sheet 10 or the processing equipment. If the scraped powder adheres, it becomes necessary to remove the scraped powder from the decorative sheet 10 or the processing equipment, which is time-consuming. In addition, the adhesion of the scraped powder to the surface of the decorative sheet 10 may degrade the appearance of the decorative sheet 10.

[0038] Furthermore, when two decorative sheets 10 are transported in a stacked state with their surfaces facing each other in the up-down direction V (thickness direction), the surfaces of the two decorative sheets 10 rub against each other and are scraped off by the antiviral agent 31, which may result in scratches on the decorative sheet 10. Furthermore, if the surface of the decorative sheet 10 is continuously touched with the hand, fingerprints on the hand may be scraped off by the antiviral agent 31.

[0039] Since the surface protective layer 3 contains the large particle size additive 32 having a larger average particle size than the antiviral agent 31, when an object comes into contact with the surface of the decorative sheet 10, the object is inhibited by the large particle size additive 32, thereby preventing the object from coming into contact with the antiviral agent 31.

[0040] 2, the average particle size R2 of the large particle size additive 32 is larger than the average particle size R1 of the antiviral agent 31, and the protruding height H2 of the large particle size additive 32 is larger than the protruding height H1 of the antiviral agent 31, so that an object that comes into contact with the surface of the decorative sheet 10 first comes into contact with the large particle size additive 32. Therefore, the large particle size additive 32 inhibits the object, making it possible to prevent the object from coming into contact with the antiviral agent 31.

[0041] Here, the large particle size additive 32 has a lower hardness than the antiviral agent 31. For example, the antiviral agent 31 contains inorganic particles such as silver, and the large particle size additive 32 contains synthetic resin beads or the like that have a lower hardness than the inorganic particles such as silver.

[0042] When an object comes into contact with the surface of the decorative sheet 10, the object is less likely to be scratched when it comes into contact with the large particle size additive 32, compared to when it comes into contact with the antiviral agent 31, which has a higher hardness than the large particle size additive 32. In other words, the large particle size additive 32 is less likely to scrape off the object it comes into contact with, compared to the antiviral agent 31.

[0043] As a result, the antiviral agent 31 can be prevented from scraping off the processing equipment, the decorative sheet 10, or fingerprints, thereby reducing the labor required to remove shavings from the decorative sheet 10 or the processing equipment, and reducing the deterioration of the appearance or damage to the decorative sheet 10.

[0044] In addition, among the multiple antiviral agents 31 and large particle size additives 32 contained in the surface protective layer 3, it is sufficient that the protruding height H2 of at least some of the large particle size additives 32 is larger than the protruding height H1 of the antiviral agent 31. If the protruding height H2 of at least some of the large particle size additives 32 is larger than the protruding height H1 of the antiviral agent 31, an object that comes into contact with the surface of the decorative sheet 10 is inhibited by the large particle size additives 32, and therefore, the object can be prevented from coming into contact with the antiviral agent 31.

[0045] According to the decorative sheet 10 and decorative board 100 of this embodiment, the surface protective layer 3 provided on the surface of the decorative sheet 10 has an antiviral agent 31 and a large particle size additive 32. The average particle size R2 of the large particle size additive 32 is larger than the average particle size R1 of the antiviral agent 31.

[0046] Therefore, even if an object comes into contact with the surface of decorative sheet 10, large particle size additive 32 inhibits the object from coming into contact with antiviral agent 31, and can prevent the object from being scraped off by antiviral agent 31. As a result, it is possible to provide decorative sheet 10 and decorative board 100 that contain antiviral agent 31 and are unlikely to damage objects that come into contact with their surfaces.

[0047] Although one embodiment of the present invention has been described in detail above with reference to the drawings, the specific configuration is not limited to this embodiment, and design modifications and the like within the scope of the present invention are also included. In addition, the components shown in the above-mentioned embodiment and the modified examples shown below can be appropriately combined to form a configuration.

[0048] (Variation 1) In the above embodiment, the base fabric layer 1 of the decorative sheet 10 is adhered to the substrate 20, but the form of the decorative sheet is not limited to this. The decorative sheet may have a primer layer on the lower side of the base fabric layer to improve adhesion between the decorative sheet and the substrate.

[0049] The primer layer may be made of a polyester resin, a urethane resin, an acrylic resin, or the like. The primer layer may be formed by a known printing method such as gravure printing, offset printing, flexographic printing, silk screen printing, or inkjet printing, or a forming method using a known coating device. The primer layer may also be formed by a melt extrusion molding method.

[0050] When the adhesion between the base fabric layer and the substrate is insufficient, the adhesion between the decorative sheet and the substrate can be improved by providing a primer layer below the base fabric layer.

[0051] The present invention will be described in detail below with reference to examples, but the present invention is not limited to the following examples.

[0052] Example 1 A pattern was printed on the surface of the upper side UP of the raw fabric layer 1 to form a pattern layer 2. A surface protective layer 3 containing an antiviral agent 31 having an average particle size R1 of 1 μm and a large particle size additive 32 having an average particle size R2 of 50 μm was formed on the upper side UP of the pattern layer 2 to form a decorative sheet 10. Furthermore, a substrate 20 was adhered to the lower side LO of the decorative sheet 10, thereby obtaining the decorative board 100 of Example 1.

[0053] Here, the ratio (R2 / R1) of the average particle size R2 of the large particle size additive 32 to the average particle size R1 of the antiviral agent 31 is 50. In other words, the average particle size R2 of the large particle size additive 32 is 50 times the average particle size R1 of the antiviral agent 31. Hereinafter, the ratio of the average particle size R2 of the large particle size additive 32 to the average particle size R1 of the antiviral agent 31 will also be referred to as the "particle size ratio."

[0054] Example 2 The decorative board 100 of Example 2 was obtained in the same manner as in Example 1, except that the average particle size R2 of the large particle size additives 32 was set to 20 μm. Here, the particle size ratio is 20. That is, the average particle size R2 of the large particle size additive 32 is 20 times the average particle size R1 of the antiviral agent 31.

[0055] Example 3 The decorative board 100 of Example 3 was obtained in the same manner as in Example 1, except that the average particle size R2 of the large particle size additives 32 was set to 10 μm. Here, the particle size ratio is 10. That is, the average particle size R2 of the large particle size additive 32 is 10 times the average particle size R1 of the antiviral agent 31.

[0056] Example 4 Decorative board 100 of Example 4 was obtained in the same manner as in Example 1, except that antiviral agent 31 had an average particle size R1 of 5 μm. Here, the particle size ratio is 10. That is, the average particle size R2 of the large particle size additive 32 is 10 times the average particle size R1 of the antiviral agent 31.

[0057] Example 5 Decorative board 100 of Example 5 was obtained in the same manner as in Example 1, except that the average particle size R1 of antiviral agent 31 was set to 10 μm. Here, the particle size ratio is 5. That is, the average particle size R2 of the large particle size additive 32 is 5 times the average particle size R1 of the antiviral agent 31.

[0058] Example 6 Decorative board 100 of Example 6 was obtained in the same manner as in Example 1, except that antiviral agent 31 had an average particle size R1 of 5 μm and large particle size additive 32 had an average particle size R2 of 20 μm. Here, the particle size ratio is 4. That is, the average particle size R2 of the large particle size additive 32 is four times the average particle size R1 of the antiviral agent 31.

[0059] Example 7 Decorative board 100 of Example 7 was obtained in the same manner as in Example 1, except that antiviral agent 31 had an average particle size R1 of 5 μm and large particle size additive 32 had an average particle size R2 of 10 μm. Here, the particle size ratio is 2. That is, the average particle size R2 of the large particle size additive 32 is twice the average particle size R1 of the antiviral agent 31.

[0060] Example 8 Decorative board 100 of Example 8 was obtained in the same manner as in Example 1, except that antiviral agent 31 had an average particle size R1 of 10 μm and large particle size additive 32 had an average particle size R2 of 20 μm. Here, the particle size ratio is 2. That is, the average particle size R2 of the large particle size additive 32 is twice the average particle size R1 of the antiviral agent 31.

[0061] Comparative Example 1 A decorative board of Comparative Example 1 was obtained in the same manner as in Example 1, except that the average particle size of the antiviral agent was 10 μm and the average particle size of the large particle size additive was 10 μm. Here, the particle size ratio is 1. That is, the average particle size of the large particle size additive is 1 times the average particle size of the antiviral agent.

[0062] Comparative Example 2 A decorative board of Comparative Example 2 was obtained in the same manner as in Example 1, except that the surface protective layer did not contain any large particle size additive and the average particle size of the antiviral agent was 5 μm.

[0063] (Test 1) A metal rubbing test was carried out on the decorative sheets of Examples 1-8 and Comparative Examples 1-2. In the metal rubbing test, the surface (upper surface) of the decorative sheet was rubbed with a metal plate with a load of 500 g applied from above, reproducing a state in which the surface of the decorative sheet is rubbed against a metal processing equipment such as a guide roll.

[0064] Ten testers performed a sensory test on the surface of the decorative sheet after rubbing it with a metal plate to evaluate its workability. Specifically, they checked the amount of shavings generated when the metal plate was scraped by the decorative sheet, and evaluated the workability of the decorative sheet when it was processed using metal processing equipment.

[0065] The evaluation criteria were on a four-point scale, with anything other than "fail" being considered a pass. Excellent: Eight or more people rated the workability as excellent. Good: Five or more and seven or fewer people rated the workability as excellent. Fair: 3 to 4 people rated the workability as excellent. Poor: Two or fewer people rated the workability as excellent.

[0066] (Test 2) A sheet rubbing test was carried out on the decorative boards of Examples 1-8 and Comparative Examples 1-2. In the sheet rubbing test, the surface of the decorative board was rubbed with a decorative sheet with a load of 500 g applied from above. Here, the decorative sheet was placed on the surface of the decorative board so that the surface of the decorative board and the surface of the decorative sheet faced each other in the thickness direction.

[0067] The sheet abrasion test was performed using a decorative sheet similar to that of the example or comparative example in which the sheet abrasion test was performed. For example, the sheet abrasion test for the decorative board 100 of Example 1 used the decorative sheet 10 provided in the decorative board 100 of Example 1. That is, the sheet abrasion test was performed using a decorative board and a decorative sheet having the same configuration of the surface protection layer.

[0068] Ten testers performed a sensory test on the surface of the decorative board after rubbing with the decorative sheet to evaluate the processability. Specifically, the degree of damage to the decorative board and decorative sheet caused by the surfaces of the decorative board and decorative sheet, which have the same configuration of the surface protection layer, rubbing against each other was confirmed, and the processability was evaluated when two decorative boards or decorative sheets were stacked with their surfaces facing each other in the thickness direction and processed (for example, transported).

[0069] The evaluation criteria were on a four-point scale, with anything other than "fail" being considered a pass. Excellent: Eight or more people rated the workability as excellent. Good: Five or more and seven or fewer people rated the workability as excellent. Fair: 3 to 4 people rated the workability as excellent. Poor: Two or fewer people rated the workability as excellent.

[0070] (Test Results) The results of Tests 1 and 2 are shown in Table 1. The average particle size of the antiviral agent, the average particle size of the large particle size additive, and the particle size ratio, which is the average particle size of the large particle size additive to the average particle size of the antiviral agent, are shown in Table 1. Note that in Comparative Example 2, the surface protective layer does not contain a large particle size additive, so the average particle size and particle size ratio of the large particle size additive are not shown.

[0071] Example 1-8, in which the surface protective layer 3 includes an antiviral agent 31 and a large particle size additive 32, and the average particle size R2 of the large particle size additive 32 is larger than the average particle size R1 of the antiviral agent 31, showed good results in Tests 1 and 2.

[0072] Comparative Example 1, in which the average particle size of the antiviral agent and the average particle size of the large particle size additive were the same, and Comparative Example 2, which did not have a large particle size additive, failed both Tests 1 and 2.

[0073] [Table 1] [Explanation of symbols]

[0074] 100 Veneer 10 Decorative Sheet 1 Original layer 2 Pattern Layer 3 Surface protective layer 31 Antiviral Agents 32 Large particle size additives 3s Surface of the surface protection layer 20 Substrate R1 Average particle size of antiviral agent R2 Average particle size of large particle additive H1 Antiviral protrusion height H2 Protruding height of large particle size additive V Vertical direction (thickness direction) UP upper side LO Lower

Claims

1. The original layer and A pattern layer provided on the upper side of the raw fabric layer; a surface protective layer provided on the upper side of the pattern layer, the surface protective layer having an antiviral agent and a large particle size additive; Equipped with The large particle size additive has an average particle size larger than the average particle size of the antiviral agent. Decorative sheet.

2. The average particle size of the large particle size additive is at least twice the average particle size of the antiviral agent. The decorative sheet according to claim 1 .

3. a protruding height of the large particle diameter additive on the surface of the surface protective layer is greater than a protruding height of the antiviral agent; The decorative sheet according to claim 1 .

4. The hardness of the large particle size additive is lower than the hardness of the antiviral agent; The decorative sheet according to claim 1 .

5. The antiviral agent comprises finely divided silver. The decorative sheet according to claim 1 .

6. The large particle size additive comprises synthetic resin beads; The decorative sheet according to claim 1 .

7. The synthetic resin beads are acrylic resin beads. The decorative sheet according to claim 6.

8. The surface protective layer contains an ionizing radiation curable resin. The decorative sheet according to claim 1 .

9. The decorative sheet according to any one of claims 1 to 8, A substrate provided below the decorative sheet; Equipped with Decorative panel.

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