Antiviral laminate and antiviral container

Abstract

To provide a laminate using a small amount of antiviral agent, the laminate capable of exhibiting sufficient antiviral properties, in which the antiviral agent is unlikely to fall.SOLUTION: A coating layer 12 having antiviral properties is formed on a surface of a substrate 11 to obtain an antiviral laminate 10A. The coating layer 12 is composed by an application of a composition in which an antiviral agent is dispersed in a resin binder. The antiviral agent is in a particulate form. The particulate antiviral agent is exposed on a surface of the coating layer, and the exposed antiviral agent covers 8.0% or more of a total area of the surface of the coating layer.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a laminate having antiviral properties and a container made of this laminate. [Background technology]

[0002] As is well known, containers are indispensable in modern life. For example, many products, including food, are sold in containers made of paper, plastic, metal, glass, etc.

[0003] These products are placed in containers and displayed on the shelves of supermarkets and other stores, where an unspecified number of consumers pick up the products, check the contents, quality, expiry date, price, etc. of the products, and consider whether to purchase them or not. Then, of the many products that they have picked up and considered in this way, they purchase some of the products and return the rest to their original place.

[0004] Recently, the business model of buying and selling goods and services over the Internet, known as Electronic Commerce (EC), has become popular, and there is also a sales channel in which goods arrive at one's home wrapped in shipping materials after passing through many places and people via logistics.

[0005] However, modern life is exposed to the risk of infection by various viruses. Many of these viruses do not infect humans, but some do. Humans can become infected with a virus, for example, when an infected person touches a product container as an infection source, and the virus-containing body fluid adheres to the outer surface of the container, and then another person touches the container and takes in the virus in the body fluid.

[0006] In order to prevent indirect contact infection through product containers, a film made by kneading an antiviral agent has been proposed (Patent Document 1). Even if an infected person, who is the source of infection, touches the container and their bodily fluids adhere to it, a container made from this film can reduce the infectivity of the virus in the bodily fluids, so that even if another person touches the container, the risk of infection can be reduced.

[0007] However, body fluids come into contact only with the outer surface of the container, and the only antiviral agent that reduces the infectivity of the virus is the antiviral agent located on the outer surface of the container. In contrast, the antiviral agent is uniformly distributed throughout the container, so most of the antiviral agent does not exert its function. For this reason, there is a problem in that a large amount of antiviral agent far exceeding the necessary amount is required for this container.

[0008] On the other hand, Patent Document 2 proposes a film in which a powdered antiviral agent is sprayed and attached to the surface. This film can reduce the infectivity of viruses attached to the surface, as with the film of Patent Document 1. Moreover, since the antiviral agent is only attached to the film surface, only the minimum amount of antiviral agent is required.

[0009] However, in this film, since the powdered antiviral agent is simply attached to the surface, the antiviral agent is easily detached from the film surface, which poses a problem that the antiviral performance itself is lost due to the detachment.

[0010] On the other hand, in Patent Document 3, a powdered antiviral agent is added to a varnish containing a resin component and applied to the surface of a substrate, thereby providing the antiviral agent for a long period of time on the surface of a product that is made of a processed substrate. It can be distributed and exerts antiviral properties for a long period of time.

[0011] However, the antiviral agent is an inorganic particle containing metal components such as Ag and Cu, and rubbing of product surfaces, particularly during distribution and transportation, can cause the inorganic particles exposed on the surface to wear away, resulting in scratches and the generation of foreign matter (inorganic particle powder), and other problems that can deteriorate product quality. [Prior art documents] [Patent documents]

[0012] [Patent Document 1] International Publication No. 2013 / 005446 [Patent Document 2] JP 2018-134753 A [Patent Document 3] Patent Application No. 2020-148913 Summary of the Invention [Problem to be solved by the invention]

[0013] Therefore, an object of the present invention is to provide a laminate that uses a small amount of an antiviral agent, exhibits sufficient antiviral performance, is less likely to drop off the antiviral agent, and further exhibits abrasion resistance during transportation. [Means for solving the problem]

[0014] That is, the invention described in claim 1 has antiviral properties on the surface of the substrate. Coating layer and abrasion-resistant coating layer An antiviral laminate comprising: the coating layer and the abrasion-resistant coating layer are laminated on the substrate via an intermediate layer; The intermediate layer is a pattern ink layer having a light base color, The above Coating layer is a layer formed by applying a composition in which an antiviral agent is dispersed in a resin binder, the antiviral agent is in particulate form, and the antiviral agent is exposed on the surface of the coating layer, and the exposed antiviral agent occupies 8.0% or more of the total area of ​​the coating layer surface. It occupies The abrasion-resistant coating layer is a layer in which any one of micro wax, silicone oil, and resin beads is added as a slip agent to the resin binder in which the antiviral agent is not dispersed, and the coating layer does not contain the slip agent. The antiviral laminate is characterized by the above.

[0015] Next, the invention described in claim 2 is the anti-viral laminate according to claim 1, characterized in that the base material is made of paper, resin, metal, a metal compound, or a laminate thereof.

[0020] next, Claim 3 The invention described in the item (1) is characterized in that the resin binder is UV-curable, and the coating layer is a layer obtained by applying the composition and then curing it by UV irradiation. Claim 1 or 2 The antiviral laminate according to claim 1,

[0021] next, Claim 4 The invention described in is that the thickness of the coating layer is 1.0μm or more characterized in that Any of claims 1 to 3 The antiviral laminate according to claim 1,

[0022] next, Claim 5 The invention described in is characterized in that the antiviral agent is composed of a metal or a compound thereof whose element symbol is Ag, Cu, Sb, Ir, Ti, Ge, Sn, Tl, Pt, Pd, Bi, Au, Fe, Co, Ni, Zn, or In. Any of claims 1 to 4 The antiviral laminate according to claim 1,

[0023] next, Claim 6 The invention described in Any of claims 1 to 5 A container made of the antiviral laminate according to claim 1, and the abrasion-resistant coating layer is disposed on the outer surface of the container. Effect of the Invention

[0024] In the present invention, the antiviral agent is not blended throughout the laminate, but is only contained in the coating layer on the substrate surface, so only a small amount of antiviral agent is required. However, the position where the antiviral agent is placed is very close to the surface to which viruses adhere, so there are many opportunities for contact with the adhering viruses. For this reason, high antiviral performance is achieved even at a low blending rate.

[0025] In addition, since the antiviral agent is dispersed in the resin binder, it does not fall off and exhibits excellent antiviral performance for a long period of time.

[0026] Furthermore, because the abrasion-resistant coating layer does not contain an antiviral agent, it is possible to prevent the antiviral agent from falling off due to friction during transportation and to prevent scratches on the product surface, thereby maintaining product quality. In addition, when the intermediate layer contains a pattern ink, it is possible to make scratches and foreign matter (inorganic particle powder) less noticeable by using a light color as the base color. [Brief description of the drawings]

[0027] [Figure 1] 1(a) to (c) are cross-sectional views showing specific examples of the laminate of the present invention. [Diagram 2] 2(a) to (c) are cross-sectional views showing examples of the laminate of the present invention from which the abrasion-resistant coating layer has been removed. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0028] Specific examples of the present disclosure will now be described with reference to the accompanying drawings, in which: Figures 1(a) to (c) are cross-sectional views showing three specific examples of the laminate of the present invention.

[0029] Of these three specific examples, a laminate 10A according to a first specific example is configured by forming an antiviral coating layer (antiviral agent-added layer) 12 and an abrasion-resistant coating layer 13 on the surface of a substrate 11 (see FIG. 1(a)). The coating layer 12 to which an antiviral agent has been added and the abrasion-resistant coating layer 13 have a single-layer structure, and the coating layer 12 to which an antiviral agent has been added and the abrasion-resistant coating layer 13 are directly laminated on the surface of the substrate 11 without interposing any other layer between the surface of the substrate 11 and the coating layer 12 to which an antiviral agent has been added and the abrasion-resistant coating layer 13.

[0030] Moreover, the laminate 10B according to the second specific example is constructed by forming coating layers 12 and 13 on the surface of the substrate 11 via an intermediate layer 14 (see FIG. 1(b)).

[0031] The laminate 10C according to the third specific example is constructed by directly forming the antiviral undercoat coating layer 12 and the abrasion-resistant coating layer 13 on the surface of the substrate 11, like the laminate 10A. However, the antiviral undercoat coating layer 12 has a two-layer structure, and the layer 12 closest to the surface of the laminate 10C is 2 is a layer 12 close to the substrate 11 1 The antiviral agent has a higher concentration than the antiviral agent (see FIG. 1(c)). The coating layer 12 to which the antiviral agent is added can have a multi-layer structure of three or more layers, not limited to a two-layer structure. Even in this case, it is desirable that the concentration of the antiviral agent is higher in the layer closer to the surface of the antiviral laminate 10. This is because viruses adhere to the surface of the laminate 10, and the higher the concentration of the antiviral agent in the layer closer to the surface of the laminate 10, the more the antiviral performance of the antiviral agent can be utilized. Furthermore, pinholes may occur in each layer, but in the case of such a multi-layer structure, the positions of the pinholes in each layer do not coincide, so pinholes can be prevented in the antiviral multi-layer structure as a whole.

[0032] Here, the substrate 11 may be any article, but is preferably in sheet form when the laminate 10 is used as a material for a packaging container. From the viewpoints of transportability and coatability when applying the coating layers 12, 13, and intermediate layer 14, the substrate 11 is preferably in sheet form with a thickness of 4.5 μm or more. More preferably, the substrate 11 is 12 μm or more.

[0033] For example, when the sheet-like substrate 11 is a material for forming a paper container, it may be a sheet containing paper in its layer structure. When the material is a material for forming a bag, it usually contains a resin in its layer structure. In addition, it may contain a metal or a metal compound. Examples of resins include polyester, polypropylene, polystyrene, nylon, polycarbonate, polyacrylonitrile, polyimide, etc. As metals, metal foils such as aluminum foils and metal vapor deposition films vapor-deposited on the resin film can be used. Examples of metal compounds include metal oxides such as silicon oxide and aluminum oxide, which can be used in the form of a metal oxide vapor deposition film vapor-deposited on the resin film. It is also possible to print or print on the substrate 11.

[0034] Next, the undercoat coating layer 12 containing an antiviral agent is a layer formed by coating a composition in which an antiviral agent is dispersed in a resin binder.

[0035] The antiviral agent is in the form of inorganic particles, and a portion of the particles must be exposed on the surface of the coating layer 12 to which the antiviral agent has been added.

[0036] As such particulate antiviral agents, metals or compounds thereof represented by the element symbols Ag, Cu, Sb, Ir, Ti, Ge, Sn, Tl, Pt, Pd, Bi, Au, Fe, Co, Ni, Zn or In can be used.

[0037] The metal atoms contained in antiviral agents made of metals or metal compounds have a positive charge. There are viruses that are enveloped in a membrane containing lipids called an envelope, and viruses that do not have an envelope. The envelope of the enveloped virus is negatively charged, and the metal atoms attract and inactivate this envelope, thereby depriving the virus of its infectivity. In addition, active oxygen is generated by the metal or its compounds, and the action of this active oxygen can inactivate the virus and deprive it of its infectivity.

[0038] In addition, as described below, such metals or compounds thereof are stable even when a UV-curable resin binder is irradiated with UV light and cured, so the antiviral layer 12 exhibits high antiviral performance even after UV light irradiation. In particular, in the case of a coating agent that uses a UV-curable resin as a binder, curing proceeds rapidly upon UV light irradiation, so that leveling of the coating surface occurs. The coating tends to harden before drying, and the surface roughness tends to be rougher than with the hot air drying method or the hot roll drying method. This increases the surface area of ​​the coating surface, and the authors' experiments have shown that this tends to further improve the antiviral effect.

[0039] Some of such particulate antiviral agents made of metals or their compounds are commercially available. For example, silver (Ag)-based antiviral agents include Biocide TB-B100 manufactured by Taisho Technos Co., Ltd., Novalon IV1000 manufactured by Toa Gosei Co., Ltd., W260 manufactured by DIC Corporation, Z253 Kokin AP10 manufactured by Toyo Ink Mfg. Co., Ltd., and PCT-NT ANV Additive manufactured by Dainichiseika Color & Chemicals Co., Ltd. In addition, copper (Cu)-based antiviral agents include NBC Meshtec Co., Ltd. and Cufitech Co., Ltd. In addition, zinc (Zn)-based antiviral agents include 3000D manufactured by Taisho Technos Co., Ltd.

[0040] Next, the resin binder that disperses the antiviral agent has the function of increasing the cohesiveness of the antiviral agent in the coating layer 12 to which the antiviral agent has been added, and also increasing the adhesion between the coating layer 12 to which the antiviral agent has been added and the substrate 11. The resin binder also improves the abrasion resistance of the coating layer 12 to which the antiviral agent has been added. An abrasion-resistant coating is applied to the portion where abrasion resistance is to be increased. In this way, the antiviral agent is fixed to the surface of the substrate 11 to prevent it from falling off, so that even if the surface is touched by a finger or the like, the antiviral agent does not come off and the antiviral performance can be maintained for a long period of time. In addition, since the antiviral performance can be maintained regardless of the presence or absence of contact with a finger or the like, a product container can be formed from this laminate 10, and infection can be prevented or suppressed even if many people come into contact with it one after another.

[0041] In order to achieve the above-mentioned functions, it is desirable for the resin binder to have ultraviolet curing properties. Such an ultraviolet curing resin binder can be formed by blending a photopolymerization initiator with a resin such as a polyester resin, a polyolefin resin, a polyamide resin, a polyurethane resin, or a polyacrylic resin.

[0042] These ultraviolet-curable resin binders are then dissolved or dispersed in a suitable solvent, and an antiviral agent is mixed and dispersed therein to form a coating composition, which is then coated, dried, and cured by irradiation with ultraviolet light to form coating layer 12 containing the added antiviral agent. The amount of the antiviral agent is desirably 0.5% by mass or more relative to the solid content of the coating composition (the total amount of components remaining in coating layer 12 containing the added antiviral agent after coating, drying, and curing), and more desirably 1.0% by mass or more.

[0043] The antiviral agent may be blended and dispersed by any known method, such as a dispersion method involving stirring with a propeller, a dispersion method using a homogenizer, or a dispersion method using a bead mill.

[0044] The coating method may be a known method, such as gravure coating, roll coating, or die coating.

[0045] In addition, ultraviolet irradiation methods are also known. For example, ultraviolet irradiation can be performed using a high-pressure mercury lamp, an ultra-high-pressure mercury lamp, a metal halide lamp, an LED lamp, or the like.

[0046] In order to prevent the antiviral agent made of inorganic particles exposed to the top surface from falling off and being scratched due to friction without impairing the antiviral performance of the coating layer 12 thus formed to which the antiviral agent has been added, an abrasion-resistant coating layer 13 to which no antiviral agent has been added is required in the portion where abrasion resistance is to be enhanced.

[0047] Next, the thickness of the antiviral-added coating layer 12 is desirably 0.5 μm or more. When the thickness is 0.5 μm or more, a sufficient amount of the antiviral agent can be secured in the antiviral-added coating layer 12, and therefore high antiviral performance can be exhibited. However, as will be described next, when the antiviral-added coating layer 12 having a single layer structure is directly laminated on the substrate 11, the thickness is desirably 1.0 μm or more in order to prevent pinholes in the antiviral-added coating layer 12 having a single layer structure.

[0048] That is, when a body fluid containing a liquid component (for example, sweat, saliva, sneeze, etc.) adheres to the surface of the laminate 10, if the substrate 11 is made of a water-absorbent material such as paper, the liquid component may pass through pinholes in the coating layer 12 to which an antiviral agent has been added and be absorbed by the substrate 11 that does not have antiviral properties. When the thickness of the coating layer 12 to which an antiviral agent has been added is 1 μm or more, there is little risk of pinholes being generated in the coating layer 12 to which an antiviral agent has been added, which is formed by coating the coating layer 12 to which an antiviral agent has been added so thickly, so that it is possible to prevent the liquid component adhered to the surface of the laminate 10 from passing through pinholes in the coating layer 12 to which an antiviral agent has been added and being absorbed by the substrate 11. For this reason, when the coating layer 12 to which an antiviral agent has been added is formed by directly laminating a single-layer structure on the substrate 11 as in the laminate 10A according to the first specific example, the thickness of the coating layer 12 to which an antiviral agent has been added is preferably 1 μm or more. More preferably, it is 2.0 μm or more.

[0049] On the other hand, in the case of the laminate 10B according to the second specific example, which is composed of three layers, namely, the base material 11, the intermediate layer 14, and the coating layer 12 to which an antiviral agent has been added or the abrasion-resistant coating layer 13, pinholes may occur in all of the intermediate layer 14, the coating layer 12 to which an antiviral agent has been added, and the abrasion-resistant coating layer 13, but the positions of the pinholes in each of the layers 14, 12 and 14, 13 do not coincide with each other, so the thicknesses of the intermediate layer 14, the coating layer 12 to which an antiviral agent has been added, and the abrasion-resistant coating layer 13 may all be thinner than 1.0 μm. For example, as in Example 2 described later, the thickness of the antiviral layer 12 is 0.5 μm or more, and the sum of the thickness of the coating layer 12 to which an antiviral agent has been added, the thickness of the intermediate layer 14, and the thickness of the coating layer 12 to which an antiviral agent has been added is 1.0 μm.

[0050] In addition, as in the laminate 10C according to the third specific example, the coating layer 12 containing the antiviral agent is the layer 12 closest to the substrate 11. 1 and layer 12 near the surface of laminate 10C. 2 Even if the material has a two-layer structure, each layer is 12 1 ,12 2 The thickness of each of the layers 12 may be less than 1.0 μm. 1 ,122 This is because the positions of the pinholes in the two lenses are never the same.

[0051] Next, the intermediate layer 14 is a layer interposed between the substrate 11 and the coating layer 12 containing an antiviral agent or the abrasion-resistant coating layer 13. This layer 14 does not contain an antiviral agent and has the purpose of improving the adhesion between the substrate 11 and the coating layer 12 containing an antiviral agent or the abrasion-resistant coating layer 13. In addition, when the substrate 11 is porous or has an uneven surface such as paper, the intermediate layer 14 can be provided as a filling layer for smoothing the surface.

[0052] For example, a pattern ink layer can be laminated as the intermediate layer 14. A light color can be used as the base color for the pattern ink layer in the area where rubbing occurs, making scratches and foreign matter (inorganic particles) less noticeable. Also, it can be formed by applying various adhesives. For example, it is a two-liquid curing dry lamination adhesive that is a mixture of polyol and isocyanate.

[0053] Alternatively, the intermediate layer 14 may be formed by melt extrusion coating a thermoplastic resin, or by dissolving or dispersing a thermoplastic resin in a solvent and coating the layer. When the intermediate layer 14 is formed from a thermoplastic resin in this manner, in order to improve the adhesion between the intermediate layer 14 and the coating layer 12 to which the antiviral agent has been added or the abrasion-resistant coating layer 13, the thermoplastic resin of the intermediate layer 14 and the resin binder in the coating layer 12 to which the antiviral agent has been added or the abrasion-resistant coating layer 13 may be used. For example, if the resin binder in the coating layer 12 containing the antiviral agent or in the abrasion-resistant coating layer 13 is a polyester-based resin, the thermoplastic resin constituting the intermediate layer 14 is also a polyester-based resin.

[0054] This intermediate layer 14 can also be formed by coating using a known method. When the intermediate layer 14 is made of an ultraviolet-curable resin, it is preferable to coat and dry the ultraviolet-curable resin that constitutes the intermediate layer 14, then coat and dry the coating layer 12 containing the antiviral agent and the coating composition for the abrasion-resistant coating layer 13, and then irradiate with ultraviolet light to cure the intermediate layer 14, the coating layer 12 containing the antiviral agent, and the abrasion-resistant coating layer 13 all at once.

[0055] The intermediate layer 14 may have any thickness, which may be determined depending on the purpose.

[0056] A pre-formed film may be used as the intermediate layer 14. In this case, the film may be adhered to the substrate 11 to form the intermediate layer 14. The adhesion method and thickness are optional.

[0057] As described above, this laminate 10 can be used as a material for forming a packaging container. For example, it can be a paper container or a packaging bag. It can also be made into a container by deep drawing. In any case, it is preferable to place the coating layer 12 containing the antiviral agent on the outer surface of the container that is likely to come into contact with hands and fingers. It is also preferable to place an abrasion-resistant coating layer 13 in areas where higher abrasion resistance is required. EXAMPLES

[0058] The present invention will be described below with reference to examples and comparative examples.

[0059] In these examples and comparative examples, the substrate 11 has a basis weight of 310 g / m 2 Coated paper (OK Ball manufactured by Oji Materia Co., Ltd.) was used.

[0060] In addition, ACEOP varnish manufactured by Toyo Ink Mfg. Co., Ltd. was prepared as a resin binder constituting the coating layer 12 containing the antiviral agent and the abrasion-resistant coating layer 13.

[0061] In addition, a particulate silver (Ag)-based antiviral agent (Biocide TB-B100, manufactured by Taisho Technos Co., Ltd.) was prepared as an antiviral agent.

[0062] Example 1 This example is a laminate 10A according to a first specific example, which is composed of three layers: a substrate 11, an intermediate layer 14, and a coating layer 12 or an abrasion-resistant coating layer 13 containing an antiviral agent, as shown in FIG. 1(b).

[0063] That is, after applying a pattern ink layer as an intermediate layer 14 to the coated surface of the substrate 11, The varnish and the antiviral agent were mixed to prepare a coating composition, which was then applied to the surface of the intermediate layer 14 and cured with UV light to form a coating layer 12 containing an antiviral agent. The amount of antiviral agent contained in the coating layer 12 containing an antiviral agent thus formed was 10 mass % of the coating layer 12 containing an antiviral agent. The coating layer 12 containing an antiviral agent had a thickness of 3.0 μm. In areas requiring higher abrasion resistance, the varnish was applied to the surface of the intermediate layer 14 and cured with UV light to form an abrasion-resistant coating layer 13. The base color of the picture ink layer was a light color.

[0064] Example 2 As shown in FIG. 2(b), this example has the same structure as Example 1, except that the abrasion-resistant coating layer 13 was not used.

[0065] Comparative Example 1 This example is also a laminate 10B according to the second specific example, and as shown in FIG. 1(b), is composed of three layers: a substrate 11, an intermediate layer 14, and a coating layer 12 or an abrasion-resistant coating layer 13 containing an antiviral agent.

[0066] This example has the same structure as Example 1, except that a dark color is used as the base color of the picture ink layer.

[0067] Comparative Example 2 As shown in FIG. 2(b), this example has the same structure as Example 2, except that no abrasion-resistant coating layer 13 is used and a dark color is used as the base color of the picture ink layer.

[0068] (evaluation) The laminates of Examples 1 and 2 and Comparative Examples 1 and 2 were evaluated from two standpoints: antiviral performance and abrasion resistance.

[0069] (Method of evaluating wear resistance) Abrasion resistance was evaluated according to JIS P8136, a method for testing the abrasion resistance of paperboard. That is, a 25 mm wide sample was placed on a sliding table with the coated side facing up, and a 20 mm wide sample was attached to the surface of a 500 g weight so that the sample placed on the sliding table and the coated side would rub against each other. After 100 reciprocating strokes over a friction distance of 120 mm, if powder generation or scratches on the coated surface were easily visible, it was rated as ×, and if no powder generation or scratches were easily visible, it was rated as ◯. These were considered to be normal conditions.

[0070] In addition to the above evaluation, abrasion resistance was evaluated by rubbing with a load of 10 to 20 kg. That is, samples of 150 mm square were sampled, and the antiviral layer was rubbed back and forth by hand 10 times with a force of 10 to 20 kg between the antiviral layer and the abrasion-resistant coating layer. If powder generation or scratches on the coating surface were easily visible, it was marked with ×, and if powder generation and scratches were not easily visible, it was marked with ◯. This was considered as the severe condition.

[0071] (Method for evaluating antiviral activity) The antiviral performance was evaluated by the virus infectivity titer specified in ISO 21702:2019.

[0072] In other words, influenza virus (H3N2, A / Hong Kong / 8 / 68) was used as the virus, and this was 5.0 × 10 6 A sample containing PFU / ml was dropped on the friction surface of each of the Examples and Comparative Examples after the wear resistance evaluation. The amount of the drop was 0.4 ml.

[0073] After 24 hours, the virus infectivity in the washout solution was measured by the plaque method. If the virus infectivity was less than 2.0 log PFU, it was evaluated as "good", and if it was 2.0 log PFU or more, it was evaluated as "bad".

[0074] (Evaluation results and considerations) The evaluation results of abrasion resistance and antiviral performance are shown in Table 1.

[0075] [Table 1]

[0076] From these results, it can be seen that when a dark color is used as the base color of the picture ink layer (Comparative Examples 1 and 2), the abrasion resistance is improved. It is clear that the quality is inferior.

[0077] In contrast, Examples 1 and 2, which use a light color as the base color of the picture ink layer, exhibit excellent abrasion resistance, maintain the quality of the product surface, and maintain excellent antiviral performance.

[0078] Furthermore, in Example 1, in which a light color was used as the base color for the abrasion-resistant coating layer and the picture ink layer, excellent abrasion resistance was exhibited even under harsh conditions, the quality of the product surface was maintained, and excellent antiviral performance was maintained. Since the effect was confirmed on paper and film substrates, this technology can be widely deployed in a wide range of products, from container packaging such as paper containers, cardboard, and soft packaging materials to books, securities, cards, and other products. [Explanation of symbols]

[0079] 10A, 10B, 10C: Antiviral laminate 11: Base material 12: Coating layer containing antiviral agent 12 1 : Layer close to the substrate 12 2 : Layer close to the surface of the laminate 13: Abrasion-resistant coating layer 14: Intermediate layer

Claims

1. An antiviral laminate comprising a coating layer having antiviral properties and an abrasion-resistant coating layer formed on the surface of a substrate, the coating layer and the abrasion-resistant coating layer are laminated on the substrate via an intermediate layer; The intermediate layer is a pattern ink layer having a light base color, the coating layer is a layer formed by coating a composition in which an antiviral agent is dispersed in a resin binder, the antiviral agent is in particulate form and is exposed on the surface of the coating layer, and the exposed antiviral agent occupies 8.0% or more of the total area of ​​the coating layer surface, the abrasion-resistant coating layer is a layer in which any one of micro wax, silicone oil, and resin beads is added as a slip agent to the resin binder in which the antiviral agent is not dispersed, the coating layer does not contain the slip agent; Antiviral laminate.

2. 2. The anti-viral laminate according to claim 1, wherein the substrate is made of paper, resin, metal, a metal compound, or a laminate thereof.

3. 3. The anti-viral laminate according to claim 1, wherein the resin binder is ultraviolet-curable, and the coating layer is a layer obtained by coating the composition and then curing it by ultraviolet irradiation.

4. 4. The anti-viral laminate according to claim 1, wherein the coating layer has a thickness of 1.0 μm or more.

5. The anti-viral laminate according to any one of claims 1 to 4, characterized in that the anti-viral agent is composed of a metal whose atomic symbol is Ag, Cu, Sb, Ir, Ti, Ge, Sn, Tl, Pt, Pd, Bi, Au, Fe, Co, Ni, Zn, or In, or a compound thereof.

6. An anti-viral container comprising an anti-viral laminate according to any one of claims 1 to 5, wherein the coating layer and the abrasion-resistant coating layer are disposed on the outer surface of the container.

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