JP2022086791A - Antiviral pressure sensitive adhesive sheet - Google Patents

Abstract

To provide antiviral property imparting means capable of reducing operational complexity and shortening operation time in imparting antiviral properties onto a target object for imparting antiviral properties or a base material thereof, without any problem with regard to environmental hygiene or fire protection due to an organic solvent, while allowing easy re-application.SOLUTION: An antiviral pressure sensitive adhesive sheet includes: an adhesive layer laminated on one side of an antiviral agent-containing layer; and a plurality of grooves formed on a side opposite to the side of the antiviral agent-containing layer of the adhesive layer.SELECTED DRAWING: Figure 4

Description

The present disclosure relates to antiviral adhesive sheets.

Conventionally, from the viewpoint of hygiene, interior materials such as walls, floors, and ceilings of buildings, furniture such as desks, fittings such as doors, interior materials of vehicles, OA equipment, touch panels, and other surfaces that people touch. Attempts have been made to impart antiviral properties to the furniture.
Patent Document 1 discloses that a composition containing a copper-based antiviral agent is directly applied to an object to be imparted with antiviral properties to impart antiviral properties.
Further, in Patent Document 2, a coating film of a composition containing a silver-based or zinc-based antiviral agent is formed on the surface of various decorative sheets used for surface cosmetics of building interior materials, furniture, fittings and the like. An antiviral decorative sheet having an antiviral property imparted to the surface thereof has been disclosed, and the antiviral decorative sheet is placed on an object to be imparted with the antiviral property or a base material thereof, and a starch paste, 2 Adhesion and laminating have also been performed via an adhesive layer such as a liquid-curable urethane resin.

Japanese Patent No. 6145758 Japanese Patent No. 6229429

However, as disclosed in Patent Document 1, direct application of the anti-virus agent to the object to be imparted anti-virus property such as the interior of a building or its base material is to mask the parts that do not need to be applied (prevent paint adhesion) at the construction site. When the solvent of the paint is an organic solvent, the finished appearance and anti-virus performance will vary depending on the skill of the painter (craftsman), which requires a lot of time and effort such as preparation, paint coating, drying, and cleaning up. There are also complications such as the need for measures such as health and hygiene and fire prevention. Moreover, if there are defects, failures, defects, etc. in the result of the coating work, it is necessary to peel off and remove the paint to repeat the coating work, which is very laborious, costly, and time-consuming, and difficult. be.
Further, as in the case of disclosure of Patent Document 2, in the case of adhesion or laminating of an antiviral decorative sheet on an antiviral object to be imparted or its base material via an adhesive, the quality of the decorative sheet is controlled at the factory to manufacture the decorative sheet. Therefore, there is an advantage that the anti-virus performance is stabilized at a certain level. However, on the other hand, as in the case of direct coating, at the construction site, it takes a lot of time and effort to mix and adjust the adhesive, prepare for masking, apply the adhesive, wait for the adhesive time, and clean up afterwards. Long, the skill of the adhesive contractor (craftsman) causes variations in the finished appearance and adhesive performance over time. If the adhesive solvent is an organic solvent, measures such as health and hygiene and fire prevention are required. There is. In addition, if there are defects, failures, defects, etc. in the result of the adhesive laminating work, it is necessary to peel off and remove the adhesive decorative sheet to redo the adhesive work, which is very laborious, costly, and time-consuming. ,Have difficulty.
Furthermore, as a common problem in both the direct application of the antiviral agent, the adhesion of the antiviral decorative sheet, and the laminating form, the complicated work at the construction site, the length of the work time, and the difficulty of re-construction are high. For this reason, it may be difficult for amateurs to perform so-called "DIY" construction.

The present disclosure reduces the complexity of work, shortens the work time, and does not have concerns about environmental hygiene and fire prevention due to organic solvents in imparting anti-virus property to the object to be given anti-virus property or its substrate. The object is to provide an anti-virus property-imparting means that can be easily reconstructed.

In order to solve the above problems, the present disclosure provides an antiviral pressure-sensitive adhesive sheet in which a pressure-sensitive adhesive layer is laminated on one side surface of an antiviral agent-containing layer.

In the antiviral pressure-sensitive adhesive sheet, a plurality of grooves may be formed on the surface of the pressure-sensitive adhesive layer opposite to the surface of the antiviral agent-containing layer.

According to the present disclosure, in imparting anti-virus property to an object to be imparted anti-virus property or its substrate, the complexity of work is reduced, the work time is shortened, and there is no concern about environmental hygiene or fire prevention due to organic solvents. Moreover, it is possible to provide an anti-virus property-imparting means that can be easily reconstructed.

FIG. 6 is a cross-sectional view showing an embodiment of the antiviral adhesive sheet of the present disclosure. FIG. 6 is a cross-sectional view showing another embodiment of the antiviral adhesive sheet of the present disclosure. FIG. 6 is a cross-sectional view showing another embodiment of the antiviral adhesive sheet of the present disclosure. FIG. 6 is a cross-sectional view showing another embodiment of the antiviral adhesive sheet of the present disclosure. The figure explaining the pressure-sensitive adhesive layer which concerns on other embodiment of the anti-viral pressure-sensitive adhesive sheet of this disclosure. FIG. 6 is a cross-sectional view showing another embodiment of the antiviral adhesive sheet of the present disclosure.

[Anti-virus adhesive sheet]
The antiviral pressure-sensitive adhesive sheet 100 of the present embodiment has a layer containing an antiviral agent and a pressure-sensitive adhesive layer 50.
Hereinafter, the "layer containing an antiviral agent" may be referred to as an "antiviral agent-containing layer". Further, a laminated body in which an antiviral agent-containing layer having one antiviral agent-containing layer (single layer) is further laminated with another layer containing no antiviral agent such as a base material, an adhesive layer, and a decorative layer. There is also a case (a form represented by FIGS. 2 and 3) composed of. Among the antiviral agent-containing layers having such a laminated structure, the portion of the layer containing the antiviral agent is hereinafter also referred to as, in particular, "antiviral agent-containing layer single layer" or "antiviral agent-containing layer single layer portion". Call it.
When the antiviral adhesive sheet 100 of the present embodiment exhibits antibacterial and antifungal properties at the same time as the expression of antiviral properties, it can also be used as an antibacterial adhesive sheet and an antifungal adhesive sheet. be.

In general, even if the articles are made of the same material and have the same layer structure, the correlation between the expressed "antiviral property", "antibacterial property", and "antifungal property" is the target virus, bacteria, and mold. Depending on the type of; environmental conditions; required antiviral, antibacterial, antifungal levels; etc., it may or may not be effective. Therefore, the antiviral adhesive sheet of the present embodiment can be applied not only to antiviral applications but also to antibacterial applications, depending on the type of bacteria, environmental conditions, and required antibacterial level. In some cases. Since mold is a type of fungus, the antiviral adhesive sheet of the present embodiment can also be used for antifungal use according to the type of mold, environmental conditions, and the required level of antifungal property. In some cases it can be applied.

FIG. 1A is a cross-sectional view showing a typical embodiment of an antiviral agent-containing layer 10 having an adhesive layer 50 constituting the antiviral adhesive sheet 100 of the present disclosure.
The antiviral adhesive sheet 100 of FIGS. 1 (a) to 1 (c) is usually used so that the XY plane faces a person.

The antiviral agent-containing layer 10 of FIG. 1A contains the antiviral agent 12 throughout the in-plane direction and the thickness direction of the antiviral agent-containing layer 10. In the antiviral agent-containing layer 10 of FIG. 1 (b), the antiviral agent 12 is placed on the surface side (upper side of the figure) of the antiviral agent-containing layer 10 in the in-plane direction (each direction in the XY plane of the figure). ) Included in the vicinity. The antiviral agent-containing layer 10 of FIG. 1 (c) contains the antiviral agent 12 in a part of the region in the in-plane direction on the surface side (upper side of the figure) of the antiviral agent-containing layer 10.
As shown in FIGS. 1A to 1C, the location of the antiviral agent 12 in the antiviral agent-containing layer 10 is not particularly limited. However, from the viewpoint of enhancing the antiviral property, it is preferable to have the antiviral agent 12 in at least a part of the region near the surface where the antiviral agent-containing layer 10 is exposed.

In the present specification, the surface on which the antiviral agent-containing layer is exposed means the surface on which the plane direction of the antiviral agent-containing layer is exposed. The plane direction of the antiviral agent-containing layer is the XY direction referred to in FIGS. 1 to 3.
Further, in the present specification, the vicinity of the surface where the antiviral agent-containing layer is exposed means a region in the range where the antiviral agent is contained in the thickness direction from the surface where the antiviral agent is exposed.
That is, when the radioactive compound (antiviral agent 6) described later is used as the antiviral agent 12, the antiviral agent 12 is absent on the surface of the antiviral agent-containing layer 10 and the antiviral agent 12 is present only inside the layer. It can also exhibit antiviral properties in morphology. However, in other forms in which the antiviral agent 12 is used, the portion of the antiviral agent-containing layer 10 that reliably exhibits antiviral properties is exposed to the outside from the antiviral agent-containing layer 10. This is the part that was done. Therefore, it is sufficient that at least one minimum unit consisting of particles, atoms (including ionized ones), or molecules of the antiviral agent 12 is present on the surface of the antiviral agent-containing layer 10. For example, when the antiviral agent has an atom or a molecule as the minimum unit, it is sufficient if a monatomic layer or a monomolecular layer exists, and when the antiviral agent has a particle in which a plurality of atoms or molecules are aggregated as the minimum unit, it is sufficient. , It suffices if only the single particle layer exists.
However, in reality, when the antiviral agent 12 is formed in the antiviral agent-containing layer 10 as a monoatomic layer, a monomolecular layer, or a single particle layer, it is resistant to external force such as friction in addition to the difficulty in manufacturing technology. The virus agent 12 easily falls off and disappears, and easily loses its antiviral function. Further, there may be a virus that invades the inside of the antiviral agent-containing layer 10 through a gap between the antiviral agent and the binder resin.

Further, the antiviral agent 12 may have a property of bleeding from the inside of the antiviral agent-containing layer 10 toward the surface over time. In such a case, the atom, molecule, or particle of the antiviral agent 12 is composed of two or more layers on the surface of the antiviral agent-containing layer 10, or the antiviral agent 12 is applied from the surface of the antiviral agent-containing layer 10. The antiviral agent 12 distributed and contained throughout the layer 10 and a part of the antiviral agent 12 is exposed from the surface of the antiviral agent-containing layer 10, and the antiviral agent 12 exposed on the surface layer of the layer 10 has antiviral properties. The anti-virus agent that has been expressed and has fallen off or disappeared from the surface of the anti-virus agent-containing layer 10 over time can be obtained from the anti-virus agent layer immediately below or containing the anti-virus agent laminated on the surface of the anti-virus agent-containing layer 10. The antiviral agent 12 that has migrated from the inside of the layer 10 is exposed from the surface of the antiviral agent-containing layer 10 or complemented by forming a layer on the surface of the antiviral agent-containing layer 10 so that the antiviral function is over time. It can be expected to suppress the target decline.
Therefore, in reality, in many cases, atoms, molecules, or particles of the antiviral agent 12 are distributed and contained from the surface of the antiviral agent-containing layer 10 over a depth of a predetermined thickness, and the antiviral agent 12 is contained. A portion is configured to be exposed or layered from the surface of the antiviral agent-containing layer 10. The region in which the atoms of the antiviral agent 12 are distributed and contained from the surface of the antiviral agent-containing layer 10 to a depth of a predetermined thickness is referred to as "near the surface where the antiviral agent-containing layer 10 is exposed".

Therefore, the thickness range of "near the surface" includes the type of antiviral agent 12 to be used, the method for forming or manufacturing the antiviral agent-containing layer 10 in the antiviral adhesive sheet 100, the use of the antiviral adhesive sheet, and the antiviral effect. It may be appropriately designed according to the durability of the virus agent-containing layer 10 against friction and the like. The thickness of a typical antiviral agent-containing layer 10 near the surface is preferably in the range of, for example, 1 μm or more and 5000 μm or less (however, the thickness of the antiviral agent-containing layer 10 does not exceed), and is used for normal purposes and required durability. In the case of the method for forming or producing the antiviral agent-containing layer, 3 μm or more and 100 μm or less are more preferable.

The antiviral adhesive sheet 100 in which the antiviral agent-containing layer 10 is a single layer as shown in FIGS. 1 (a) to 1 (c) can be manufactured, for example, by the following methods (A1) and (A2). can. When an organic antiviral agent is used, the method (A2) is preferable in order to make it less susceptible to the influence of heat and the like during molding and to facilitate the maintenance of the function of the antiviral agent.
(A1) The composition containing the binder resin 11 and the antiviral agent 12 is molded by melt extrusion, injection molding, or the like.
(A2) After producing a laminated body formed by forming the antiviral agent-containing layer 10 on the releasable base material, the releasable base material is peeled off from the laminated body.

In the antiviral pressure-sensitive adhesive sheet 100 of FIGS. 2A and 2B, the antiviral agent-containing layer 10'is a laminated body having an antiviral agent-containing layer 10 single layer on a base material 20. belongs to.
The antiviral agent-containing layer 10'in FIG. 2A has an antiviral agent-containing layer 10 monolayer on the entire surface of one side of the base material 20. The antiviral agent-containing layer 10'in FIG. 2B has an antiviral agent-containing layer 10 monolayer in a part of a region on one side of the base material 20 (Z-axis direction + side in the figure). There is.
As shown in FIGS. 2A and 2B, the antiviral agent-containing layer 10 monolayer constituting the antiviral agent-containing layer 10'may be formed on the entire surface of the base material 20 or may be a base. It may be formed on a part of the material 20.

The antiviral agent-containing layer 10 ′ having the base material 20 and the antiviral agent-containing layer 10 single layer as shown in FIGS. 2 (a) and 2 (b) can be obtained by, for example, the following methods (B1) to (B4). Can be manufactured. When an organic antiviral agent is used, the method (B1) or (B4) is preferable in order to reduce the influence of heat when laminating the antiviral agent-containing layer 10 and to easily maintain the function of the antiviral agent. ..
(B1) A composition containing a binder resin 11 and an antiviral agent 12 is applied onto the base material 20 to form an antiviral agent-containing layer 10 as a coating film, or a sheet formed with the same composition is formed. If necessary, they are laminated (bonded) with an adhesive layer in between.
(B2) The composition containing the binder resin 11 and the antiviral agent 12 is melt-extruded onto the base material 20 to form the antiviral agent-containing layer 10.
(B3) The base material 20 and the antiviral agent-containing layer 10 are heated and welded.
(B4) A laminate formed by forming an antiviral agent-containing layer 10 on a base material having releasability is produced. After the surface of the laminate on the side of the antiviral agent-containing layer 10 and the base material 20 are brought into close contact with each other, the base material having releasability is peeled off.

The antiviral agent-containing layer 10'in the antiviral pressure-sensitive adhesive sheet 100 having the base material 20 and the antiviral agent-containing layer 10 as shown in FIGS. 2A and 2B is the base material 20 and the antiviral agent-containing layer. Other layers such as the adhesive layer 30 and the second base material 40 may be provided between the 10 single layers.
The antiviral agent-containing layer 10 ″ of FIG. 3A has an adhesive layer 30 between the base material 20 and the antiviral agent-containing layer 10 single layer. Further, the antiviral agent-containing layer 10 ″ in FIG. 3B has a second base material 40 between the base material 20 and the antiviral agent-containing layer 10 monolayer. Further, the antiviral agent-containing layer 10 ″ of FIG. 3C has an adhesive layer 30 and a second base material 40 between the base material 20 and the antiviral agent-containing layer 10 single layer. ..

The antiviral agent-containing layer 10 ″ in the antiviral pressure-sensitive adhesive sheet 100 as shown in FIGS. 3 (a) to 3 (c) can be manufactured, for example, by the following methods (C1) to (C5). When an organic antiviral agent is used, the method (C1), (C2) or (C5) is preferable in order to facilitate the maintenance of the function of the antiviral agent.
(C1) The antiviral agent-containing layer 10 single layer and the base material 20 are bonded to each other via the adhesive layer 30.
(C2) The surface of the laminate having the antiviral agent-containing layer 10 single layer on the second base material 40 on the second base material 40 side and the base material 20 are bonded to each other via the adhesive layer 30.
(C3) The surface of the laminate having the antiviral agent-containing layer 10 single layer on the second base material 40 on the second base material 40 side and the base material 20 are heated and welded.
(C4) A laminate having an antiviral agent-containing layer 10 single layer is arranged in a mold on the second base material 40. A resin that has been made into a fluid state by being heated and melted or dissolved in a solvent that constitutes the base material 20 is poured into the mold, and the resin that is in a fluid state is solidified by cooling or solvent drying to form the resin into a mold shape and the base material. By setting the number to 20, the base material 20 is laminated and formed on the second base material 40 side of the anti-virus agent-containing layer 10 single layer and the laminated body.
(C5) A laminate having an antiviral agent-containing layer 10 single layer and an adhesive layer 30 on a releasable substrate, that is, a transfer sheet is produced. After the surface of the laminate on the adhesive layer 30 side and the base material 20 are brought into close contact with each other, the base material having releasability is peeled off.

That is, specific examples of the layer structure of the antiviral agent-containing layer in the antiviral pressure-sensitive adhesive sheet 100 include the following (1) to (4). The antiviral adhesive sheet 100 may have other layers not exemplified in the following (1) to (4). Examples of other layers include a primer layer for improving adhesion, a pattern ink layer for improving designability, a decorative layer made of a metal thin film, and the like.
(1) For example, as shown in FIG. 1, a single layer structure of the antiviral agent-containing layer 10.
(2) For example, as shown in FIG. 2, a configuration having a single layer of an antiviral agent-containing layer 10 on a base material 20.
(3) For example, as shown in FIG. 3A, a configuration having an adhesive layer and an antiviral agent-containing layer 1 single layer on a substrate.
(4) For example, as shown in FIG. 3C, a configuration having an adhesive layer 30, a second base material 40, and an antiviral agent-containing layer 10 monolayer on a base material 20.

<Layer containing antiviral agent (also referred to as antiviral agent-containing layer)>
The antiviral agent-containing layer 10 is required to contain the antiviral agent 12. The antiviral agent-containing layer preferably contains an antiviral agent and a binder resin.

《Antiviral agent》
Typical examples of the antiviral agent 12 include "an antiviral agent carrying or containing a metal ion in a carrier", "particles of an imidazole compound", "styrene polymer derivative compound and unsaturated carboxylic acid derivative compound". Examples include "particles contained", "copper-based antiviral agent", "zinc-based antiviral agent", and "radioactive compound".
Hereinafter, "anti-virus agent carrying or containing metal ions in a carrier" is referred to as "anti-virus agent 1", "particles of imidazole compound" is referred to as "anti-virus agent 2", "styrene polymer derivative compound and". "Particles containing unsaturated carboxylic acid derivative compound" is "anti-virus agent 3", "copper-based anti-virus agent" is "anti-virus agent 4", and "zinc-based anti-virus agent" is "anti-virus". The "agent 5" and "radioactive compound" may be referred to as "anti-virus agent 6".

From the viewpoint of enhancing the antiviral property, it is preferable to have the antiviral agent in at least a part of the region near the surface where the antiviral agent-containing layer is exposed. By increasing the content of the antiviral agent or adjusting the specific gravity of the antiviral agent and the binder resin, the above-mentioned constitution can be easily satisfied.

Even if the antiviral agent is buried in the antiviral agent-containing layer, the antiviral property can be exhibited by the following action.
For example, an atom or ion, a compound molecule, or the like having antiviral properties such as silver ions may be released from the antiviral agent, or the antiviral agent itself may be bleeded from the inside of the antiviral agent-containing layer 10 to the surface. Therefore, the antiviral property can be exhibited by the presence of a substance having the antiviral property on the surface of the antiviral agent-containing layer and in the vicinity of the surface. Further, when the anti-virus agent is a radioactive compound, anti-virus property can be exhibited by radiating virus-killing radiation such as α-rays and β-rays on the surface of the anti-virus agent-containing layer.
Alternatively, the virus passes from the surface to the surface of the antiviral agent-containing layer 10 via the gap between the interface between the antiviral agent 12 and the binder resin 11, cracks in the antiviral agent-containing layer 10 itself, and fine voids such as a porous structure. It may penetrate (or invade) the inside of the vicinity and come into contact with the antiviral agent 12 inside the antiviral agent-containing layer 10. In such a case, the antiviral agent 12 inside the antiviral agent-containing layer 10 can exhibit sufficient antiviral properties.

-Antiviral agent 1-
The antiviral agent 1 is an antiviral agent that carries or contains metal ions on a carrier.
The metal ion of the antiviral agent 1 is preferably either silver or zinc, and more preferably contains both silver and zinc in order to suppress discoloration and reduce the cost.
Silver has better antiviral properties than zinc, but it is expensive and easily discolored by oxidation. Zinc can suppress discoloration due to oxidation of silver. Therefore, by containing both silver and zinc, discoloration can be suppressed and the cost can be reduced.

As the carrier of the antiviral agent 1, inorganic compounds such as zeolite, apatite, glass, molybdenum, zirconium phosphate and titanium phosphate are preferable, and a porous inorganic compound is preferable.

Zeolites are aluminosilicates of alkali metals or alkaline earth metals, and either natural zeolites or synthetic zeolites can be used. Zeolites are classified into A type, faujasite type (X type, Y type), mordenite type, clinoptilolite type and the like according to the crystal structure, and any of them can be used.

Apatite is a general term for minerals having a composition represented by the following general formula.
M ₁₀ (ZO ₄ ) ₃ X ₂
In the above formula, M represents Ca, Ba, Mg, Na, K, Fe, Al and the like, Z represents P, S, Si and As and the like, and X represents F, Cl, O and OH and the like. show. Typical examples corresponding to the above formula include fluorine apatite "Ca ₁₀ (PO ₄ ) ₆ F ₂ " and hydroxyapatite "Ca ₁₀ (PO ₄ ) ₆ (OH) ₂ ".

Examples of the glass include soda glass, boric acid glass, lead glass, aluminosilicate glass, boric acid glass, phosphoric acid glass and the like.

As a method for supporting or containing metal ions on the carrier, a known method may be appropriately selected in consideration of the form and processing conditions of the antiviral agent-containing layer, the required level of antiviral property, and the like. Here, "containing metal ions" means holding metal ions or substances capable of generating metal ions in the carrier in some form. Further, the "substance capable of generating metal ions" means a substance that generates metal ions due to an external factor, a time-dependent factor, or the like, for example, a substance that generates metal ions by dissolving in water or the like. do.
Specific supporting or containing forms include a method of supporting by physical adsorption or chemical adsorption; a method of supporting by an ion exchange reaction; a method of supporting by a binder; a method of incorporating a silver compound into a carrier; vapor deposition and dissolution. Examples thereof include a method of supporting or containing a thin layer of a silver compound on the surface of a carrier by a thin film forming method such as a precipitation reaction or sputtering; a method of melting a simple substance such as glass or a metal at a high temperature and kneading the mixture.

The antiviral agent 1 is preferably in the form of particles.
The shape of the particles of the antiviral agent 1 includes spheres, ellipsoids, polyhedra, scales, and the like, and is not particularly limited.

The average particle size of the antiviral agent 1 is preferably 0.1 to 10.0 μm, more preferably 0.5 to 5.0 μm, and even more preferably 1.0 to 4.0 μm.
By setting the average particle size to 0.1 μm or more, the stability of the ink containing the antiviral agent 1 can be easily obtained. Further, by setting the average particle size to 10.0 μm or less, it is possible to easily suppress poor appearance, deterioration of scratch resistance and stain resistance, and whitening of the coating film, and further, members of the coating device (coating roll, doctor). It is possible to easily suppress the wear of blades, etc.).

When the average particle size of the antiviral agent 1 is defined as D1 and the thickness of the antiviral agent-containing layer is defined as T, D1 / T is preferably 1.0 or less, and more preferably 0.7 or less. , 0.5 or less is more preferable.
By setting D1 / T to 1.0 or less, it is possible to easily suppress deterioration of stain resistance and whitening of the coating film, and further, it is easy to suppress wear of the members of the coating device (coating roll, doctor blade, etc.). can.

In the present specification, the average particle size means the one measured as the mass average value d50 in the particle size distribution measurement by the laser optical diffraction method.

The amount of metal ions in the antiviral agent 1 is preferably 0.1 to 30.0 parts by mass, more preferably 0.5 to 25.0 parts by mass with respect to 100 parts by mass of the carrier. It is more preferably 1.0 to 20.0 parts by mass. Here, the "amount of metal ions" means both the supported metal ions and the contained metal ions.
By setting the amount of metal ions to 0.1 parts by mass or more, it is possible to easily improve the antiviral property. Further, by setting the amount of metal ions to 30.0 parts by mass or less, discoloration due to light can be easily suppressed.

The content of the antiviral agent 1 is preferably 0.1 to 50.0 parts by mass, more preferably 0.5 to 17.0 parts by mass with respect to 100 parts by mass of the binder resin. It is more preferably 0 to 15.0 parts by mass.
By setting the content of the antiviral agent 1 to 0.1 parts by mass or more, the antiviral property can be easily improved.
By setting the content of the antiviral agent 1 to 50.0 parts by mass or less, discoloration due to light can be easily suppressed. Further, by setting the content of the antiviral agent 1 to 50.0 parts by mass or less, it is possible to suppress deterioration of the physical properties of the coating film such as the strength and scratch resistance of the coating film. Furthermore, by setting the content of the antiviral agent 1 to 50.0 parts by mass or less, it is easy to suppress deterioration of stain resistance and whitening of the coating film, and further, members of the coating device (coating roll, doctor blade, etc.). It is possible to easily suppress the wear of the virus.
When the binder resin is a cured product of the curable resin composition, the content of the antiviral agent 1 is preferably set to a large value in the above range.

-Antiviral agent 2-
The antiviral agent 2 is a particle of an imidazole compound.
Usually, the imidazole-based compound is dissolved in an ink containing the imidazole-based compound. The reason for this is that the imidazole-based compound is uniformly diffused in any layer to exert the effect of the imidazole-based compound in the entire layer. Therefore, in the usual usage of the imidazole-based compound, the imidazole-based compound does not exist in the particle state in the antiviral agent-containing layer. That is, the present embodiment is characterized in that the imidazole-based compound maintains the state of particles.

An imidazole-based compound is a compound containing an imidazole skeleton as a constituent unit of a molecule. In the present embodiment, various imidazole compounds that maintain the morphology of particles in the antiviral agent-containing layer can be used. Such imidazole-based compounds are preferably those that are difficult to dissolve in water and organic solvents, and examples thereof include methyl-benzimidazole-2-ylcarbamate (also known as carbendazim) and polymerized imidazole-based compounds.
It should be noted that even methyl-benzimidazol-2-ylcarbamate (also known as carbendazim) and polymerized imidazole-based compounds may dissolve depending on the solvent. For example, for methyl-benzimidazol-2-ylcarbamate (also known as carbendazim), it is preferable to use methyl ethyl ketone, ethyl acetate or the like as a solvent.

The shape of the antiviral agent 2 is not particularly limited, and examples thereof include a sphere, an ellipsoid, a polyhedron, and a scaly shape.

The average particle size of the antiviral agent 2 is preferably 0.1 to 10.0 μm, more preferably 0.2 to 8.0 μm, and even more preferably 0.3 to 7.0 μm.
By setting the average particle size to 0.1 μm or more, the stability of the ink containing the antiviral agent 2 can be easily obtained. Further, by setting the average particle size to 10.0 μm or less, it is possible to easily suppress poor appearance, deterioration of scratch resistance and stain resistance, and whitening of the coating film.

When the average particle size of the antiviral agent 2 is defined as D2 and the thickness of the antiviral agent-containing layer is defined as T, the D2 / T is preferably 1.0 or less, and more preferably 0.7 or less. , 0.5 or less is more preferable.
By setting D2 / T to 1.0 or less, it is possible to easily suppress poor appearance, deterioration of scratch resistance and stain resistance, and whitening of the coating film.
The lower limit of D2 / T is not particularly limited, but is usually 0.01 or more, preferably 0.05 or more.

The content of the antiviral agent 2 is preferably 0.5 to 20.0 parts by mass, more preferably 1.0 to 13.0 parts by mass with respect to 100 parts by mass of the binder resin. It is more preferably 0 to 10.0 parts by mass.
By setting the content of the antiviral agent 2 to 0.5 parts by mass or more, the antiviral property can be easily improved.
By setting the content of the antiviral agent 2 to 20.0 parts by mass or less, it is possible to suppress deterioration of the physical properties of the coating film such as the strength and scratch resistance of the coating film. Further, by setting the content of the antiviral agent 2 to 20.0 parts by mass or less, it is possible to easily suppress deterioration of stain resistance and whitening of the coating film.

-Antiviral agent 3-
The antiviral agent 3 is a particle containing a styrene polymer derivative compound and an unsaturated carboxylic acid derivative compound.

In the present specification, the "particles containing the styrene polymer derivative compound and the unsaturated carboxylic acid derivative compound" may be "particles containing the styrene polymer derivative compound and the unsaturated carboxylic acid derivative compound", or "styrene". It may be "a mixed particle of a particle containing a polymer derivative compound and a particle containing an unsaturated carboxylic acid derivative compound", or a combination thereof.

The antiviral agent 3 contains a styrene polymer derivative compound and an unsaturated carboxylic acid derivative compound. The constituents of the styrene polymer derivative compound and the unsaturated carboxylic acid derivative compound preferably have at least one structure selected from the group consisting of styrene, sodium sulfonate, acrylic acid, maleic acid and fumaric acid, and styrene and sulfone. It is more preferred to have both at least one structure of sodium acid and at least one structure selected from the group consisting of acrylic acid, maleic acid and fumaric acid.

The content ratio of the styrene polymer derivative compound and the unsaturated carboxylic acid derivative compound in the antiviral agent 3 is not limited, but the mass ratio is preferably 30:70 to 70:30, preferably 40:60 to 60:40. Is more preferable.
When the antiviral agent 3 is a mixed particle of particles (particle A) containing a styrene polymer derivative compound and particles (particle B) containing an unsaturated carboxylic acid derivative compound, the mass ratio of the particles A to the particles B. Is preferably 30:70 to 70:30, and more preferably 40:60 to 60:40.

The reason why the antiviral agent 3 exhibits antiviral properties is not limited to the mechanism presumed below, but is considered as follows.
Influenza virus binds to a sugar chain acceptor on the surface of the host cell (the end of the sugar chain is neuromic acid) and invades the host cell, whereas the copolymer containing styrene sulfonate has an ionic group similar to that of neuromic acid. Therefore, it is considered that by binding to the virus instead of the host cell and capturing the virus, the virus is prevented from binding to the receptor of the host cell and exerts an antiviral effect. Further, it is considered that the unsaturated carboxylic acid derivative compound generates a hydroxyl group (OH−) when it comes into contact with water, and the hydroxyl group exerts an antiviral effect.

The shape of the antiviral agent 3 is not particularly limited, and examples thereof include a sphere, an ellipsoid, a polyhedron, and a scale shape.

The average particle size of the antiviral agent 3 is preferably 0.1 to 10.0 μm, more preferably 0.2 to 8.0 μm, and even more preferably 0.5 to 7.0 μm.
By setting the average particle size to 0.1 μm or more, the stability of the ink containing the antiviral agent 3 can be easily obtained. Further, by setting the average particle size to 10.0 μm or less, it is possible to easily suppress poor appearance, deterioration of scratch resistance and stain resistance, and whitening of the coating film.

When the average particle size of the antiviral agent 3 is defined as D3 and the thickness of the antiviral agent-containing layer is defined as T, the D3 / T is preferably 1.0 or less, and more preferably 0.7 or less. , 0.5 or less is more preferable.
By setting D3 / T to 1.0 or less, it is possible to easily suppress poor appearance, deterioration of scratch resistance and stain resistance, and whitening of the coating film.
The lower limit of D3 / T is not particularly limited, but is usually 0.01 or more, preferably 0.05 or more.

The content of the antiviral agent 3 is preferably 0.5 to 20.0 parts by mass, more preferably 0.5 to 19.0 parts by mass with respect to 100 parts by mass of the binder resin. It is more preferably 0 to 17.0 parts by mass, and even more preferably 1.5 to 15.0 parts by mass.
By setting the content of the antiviral agent 3 to 0.5 parts by mass or more, the antiviral property can be easily improved.
By setting the content of the antiviral agent 3 to 20.0 parts by mass or less, it is possible to suppress deterioration of the physical properties of the coating film such as the strength and scratch resistance of the coating film. Further, by setting the content of the antiviral agent 3 to 20.0 parts by mass or less, it is possible to easily suppress deterioration of stain resistance and whitening of the coating film.

-Antiviral agents 4, 5-
The antiviral agent 4 is a copper-based antiviral agent, and the antiviral agent 5 is a zinc-based antiviral agent.
Examples of the copper-based antiviral agent include cuprous oxide particles described in Japanese Patent No. 6145758, copper iodide particles described in WO2010 / 026730, and the like.
Examples of the zinc-based antiviral agent include zinc-based inorganic additives described in Japanese Patent No. 6229429.

-Antiviral agent 6-
The antiviral agent 6 is a radioactive compound.

As a radioactive compound, in order to prevent adverse effects on health due to radiation, a radioactive compound that radiates one or both of α rays and β rays having a relatively small flight distance in air or vacuum and permeability in various substances. Is preferable. Further, it is preferable that the radioactive compound radiates α-rays and / and β-rays having sufficient energy (quantum) sufficient to kill the virus, and the amount of radiation having a large substance permeability such as γ-rays is small.

Examples of the radioactive compound that radiates α rays include ²⁴¹ Am, ²⁴³ Am, ²²⁶ Ra, ²³² Th and the like. Examples of the radioactive compound that radiates β rays include ¹⁴⁷ Pm, ²¹⁰ Po, ⁹⁰ Sr, ⁹⁰ Y and the like.

《Binder resin》
Examples of the binder resin 11 include a thermoplastic resin and a cured product of a curable resin composition. The thermoplastic resin and the cured product of the curable resin composition may be mixed.

Examples of the thermoplastic resin include olefin resins such as polyethylene, polypropylene, polymethylpentene, ionomer, and various olefin-based thermoplastic elastomers; vinyl chloride-based resins such as polyvinyl chloride, polyvinylidene chloride, and vinyl chloride-vinyl acetate copolymer; polyethylene. Polyester resins such as terephthalate, polybutylene terephthalate, polyethylene naphthalate, ethylene glycol-terephthalic acid-isophthalic acid copolymer, polyester-based thermoplastic elastomer; methyl poly (meth) acrylate, ethyl poly (meth) acrylate, poly ( Acrylic resin such as butyl acrylate, methyl (meth) butyl acrylate-(meth) butyl acrylate copolymer; polyamide resin typified by nylon 6 or nylon 66; cellulose such as cellulose triacetate, cellophane, celluloid and the like. Based resin: Polystyrene resin such as polystyrene, acrylonitrile-styrene copolymer, acrylonitrile-butadiene-styrene copolymer (ABS); polyvinyl alcohol; ethylene-vinyl acetate copolymer; ethylene-vinyl alcohol copolymer; polycarbonate resin; urethane Resins; polyarylate resins; polyimide resins; etc. may be mentioned. Among these, acrylic resin is preferable.

Examples of the cured product of the curable resin composition include a cured product of a thermosetting resin composition and a cured product of an ionized radiation curable resin composition, and among them, an ionized radiation curable resin from the viewpoint of scratch resistance and production efficiency. A cured product of the composition is preferred.

The thermosetting resin composition is a composition containing at least a thermosetting resin, and is a resin composition that is cured by heating.
Examples of the thermosetting resin include acrylic resin, urethane resin, phenol resin, urea melamine resin, epoxy resin, unsaturated polyester resin, silicone resin and the like. In addition to these thermosetting resins, a curing agent, a curing catalyst, and the like are added to the thermosetting resin composition, if necessary.

Typical examples of the ionizing radiation curable resin composition include an electron beam curable resin composition and an ultraviolet curable resin composition. Among these, a polymerization initiator is not required, so that the resin composition has less odor and is colored. An electron beam curable resin composition is preferable from the viewpoint of difficulty. Further, when the antiviral agent-containing layer contains an ultraviolet absorber described later, the electron beam curable resin composition tends to increase the crosslink density of the antiviral agent-containing layer, and has good scratch resistance and stain resistance. It is also preferable because it is easy to make.

The ionizing radiation curable resin composition is a composition containing a compound having an ionizing radiation curable functional group (hereinafter, also referred to as “ionizing radiation curable compound”).
The ionizing radiation curable functional group is a group that is crosslinked and cured by irradiation with ionizing radiation, and a functional group having an ethylenic double bond such as a (meth) acryloyl group, a vinyl group, and an allyl group is preferable. Further, examples of the ionizing radiation curable functional group include an epoxy group and an oxetanyl group.
In addition, in this specification, a (meth) acryloyl group means an acryloyl group or a metachloroyl group. Further, in the present specification, (meth) acrylate means acrylate or methacrylate.
Further, ionizing radiation means an electromagnetic wave or a charged particle beam having an energy quantum capable of polymerizing or cross-linking a molecule, and usually, an ultraviolet ray (UV) or an electron beam (EB) is used. Electromagnetic waves such as X-rays and γ-rays, and charged particle rays such as α-rays and ion rays are also included.
Specifically, the ionizing radiation curable compound is appropriately selected from polymerizable monomers and polymerizable oligomers (sometimes referred to as "polymerizable prepolymers") conventionally used as ionizing radiation curable resins. Can be used.

The ionizing radiation curable compound is more preferably a compound having two or more ethylenically unsaturated bonding groups, and more preferably a polyfunctional (meth) acrylate compound having two or more ethylenically unsaturated bonding groups. As the polyfunctional (meth) acrylate compound, either a monomer or an oligomer can be used.

Among the polyfunctional (meth) acrylate compounds, the bifunctional (meth) acrylate monomers include ethylene glycol di (meth) acrylate, bisphenol A tetraethoxydiacrylate, bisphenol A tetrapropoxydiacrylate, and 1,6-hexane. Examples thereof include diol diacrylate.
Examples of the trifunctional or higher functional (meth) acrylate-based monomer include trimethylolpropane tri (meth) acrylate, pentaerythritol tri (meth) acrylate, pentaerythritol tetra (meth) acrylate, dipentaerythritol hexa (meth) acrylate, and di. Examples thereof include pentaerythritol tetra (meth) acrylate and isocyanuric acid-modified tri (meth) acrylate.
Examples of the polyfunctional (meth) acrylate-based oligomer include acrylate-based polymers such as urethane (meth) acrylate, epoxy (meth) acrylate, polyester (meth) acrylate, and polyether (meth) acrylate.

Urethane (meth) acrylate is obtained, for example, by reacting a polyhydric alcohol and an organic diisocyanate with a hydroxy (meth) acrylate.

The preferred epoxy (meth) acrylate is a (meth) acrylate obtained by reacting a trifunctional or higher aromatic epoxy resin, an alicyclic epoxy resin, an aliphatic epoxy resin, or the like with a (meth) acrylic acid, and a bifunctional or higher functional epoxy resin. (Meta) acrylate obtained by reacting aromatic epoxy resin, alicyclic epoxy resin, aliphatic epoxy resin, etc. with polybasic acid and (meth) acrylic acid, and bifunctional or higher functional aromatic epoxy resin, alicyclic. It is a (meth) acrylate obtained by reacting a group epoxy resin, an aliphatic epoxy resin or the like with phenols and (meth) acrylic acid.

The ionizing radiation curable resin may be used alone or in combination of two or more.

When the radiation-curable compound is an ultraviolet curable compound, the ionizing radiation-curable resin composition preferably contains an additive such as a photopolymerization initiator or a photopolymerization accelerator.
Examples of the photopolymerization initiator include one or more selected from acetophenone, benzophenone, α-hydroxyalkylphenone, Michler ketone, benzoin, benzyldimethylketal, benzoylbenzoate, α-acyloxime ester, thioxanthones and the like.
Further, the photopolymerization accelerator can reduce the polymerization inhibition due to air at the time of curing and accelerate the curing rate. For example, from p-dimethylaminobenzoic acid isoamyl ester, p-dimethylaminobenzoic acid ethyl ester and the like. One or more selected species can be mentioned.

"Additive"
The antiviral agent-containing layer may contain additives such as antioxidants, light stabilizers, ultraviolet absorbers, matting agents and coloring agents.

《Thickness》
The thickness of the antiviral agent-containing layer 10 single layer portion can be, for example, 1.0 μm or more and 10,000 μm (1 cm) or less from the viewpoint of the balance between processing characteristics and scratch resistance.
When the antiviral pressure-sensitive adhesive sheet 100 is composed of a single layer of the antiviral agent-containing layer, it is preferable that the thickness of the antiviral agent-containing layer is thick. In the case of a single layer, the thickness of the antiviral agent-containing layer is preferably 1.0 μm or more and 10,000 μm or less, and more preferably 10 μm or more and 5,000 μm or less.
On the other hand, when the antiviral agent-containing layer has a base material, the base material is responsible for self-supporting property and durability against external force, and the effect is saturated if the antiviral property has a thickness of a certain level or more. In consideration of the fact that the processability decreases as the thickness of the antiviral agent-containing layer single layer portion increases, the thickness of the antiviral agent-containing layer single layer portion is preferably a thin film. In the case of the form having a base material, the thickness of the antiviral agent-containing layer single layer is preferably 1.5 μm or more and 30 μm or less, more preferably 2 μm or more and 20 μm or less, and 3 μm or more from the viewpoint of the balance between processing characteristics and scratch resistance. It is more preferably 15 μm or less.

From the viewpoint of handleability, the antiviral agent-containing layer preferably has a single layer of the antiviral agent-containing layer on the substrate. Further, the antiviral agent-containing layer having the antiviral agent-containing layer single layer on the substrate may further have another layer such as an adhesive layer and a decorative layer.

<Adhesive layer>
One side surface of the antiviral agent-containing layers 10, 10 ′, and 10 ″, and the side surface exposed to the outermost surface after the antiviral adhesive sheet 100 is adhered to the surface of the adherend. The pressure-sensitive adhesive layer 50 is laminated on the opposite surface. That is, the antiviral pressure-sensitive adhesive sheet 100 is adhered to the surface of the adherend through the pressure-sensitive adhesive layer 50.
Unlike ordinary adhesives, the pressure-sensitive adhesive layer 50 instantly develops an adhesive force by simply contacting and pressurizing the adhesive layer. There is no need to supply energy such as. Therefore, the antiviral adhesive sheet 100 can be easily adhered to the surface of the adherend, and the surface can be imparted with antiviral properties. In addition, since the adhesive strength of the adhesive layer 50 is set to be weak, if an adhesive defect such as positional deviation, wrinkles, or slack occurs during adhesion, the antiviral adhesive sheet 100 is once peeled off and then defective. It is possible to re-adhere (re-stick) the peeled anti-virus adhesive sheet 100 after eliminating the above.

In the present embodiment, as shown in FIGS. 4 or 5 (a) to 5 (c), the pressure-sensitive adhesive layer 50 is on the W side of the adherend (the 60 side of the releasable support sheet described later, in other words, antiviral). It is preferable that a plurality of groove portions 51 are formed on the surface of the virus agent-containing layer 10, 10 ′, and the surface opposite to the surface on the side of 10 ″. In FIG. 5 illustrating the pressure-sensitive adhesive layer 50, (a) is a perspective view from the W surface side of the adherend, (b) is a plan view from the W surface side of the adherend, and (c) is the W surface of the adherend. It is sectional drawing which made the side face down. Hereinafter, a preferred form in which a plurality of groove portions 51 are formed in the pressure-sensitive adhesive layer 50 will be described.
As shown in FIGS. 5A to 5C, there is a convex portion 52 between the groove portions 51, and the top surface of the convex portion 52 forms the sticking surface 50a. The groove portions 51 are arranged in the first direction d1 and the second direction d2 parallel to the plane direction of the pressure-sensitive adhesive layer 50, respectively. In the present preferred embodiment, the example in which the first direction d1 and the second direction d2 intersect at 90 ° is shown, but the angle at which the two directions intersect is not limited to this. Further, in the present preferred embodiment, an example is shown in which the groove portions 51 arranged in the first direction d1 and the groove portions 51 arranged in the second direction d2 have the same arrangement pitch, width, and depth, but the present invention is limited to this. However, it may be adopted as appropriate.
As shown in FIGS. 5A to 5C, the cross-sectional shape of the groove 51 is a rectangular shape in this preferred form, but is not limited to this, and may be a polygonal shape such as a triangular shape or a pentagonal shape. However, it may be a part of a circular shape such as a semi-circular shape or a part of an elliptical shape, or may be adopted as appropriate.

The depth of the groove 51 (dimension in the thickness direction of the pressure-sensitive adhesive layer 50) is 3 μm or more and 50 μm or less, preferably 15 μm or more and 25 μm. Further, the width of the groove portion 51 in the first direction d1 and the second direction d2 is preferably 100 μm or more and 300 μm or less. Further, the arrangement pitch of the groove portion 51 in the first direction d1 and the second direction d2 is preferably 500 μm or more and 1500 μm or less.
By forming the groove 51 that satisfies the above dimensional range, air can be easily discharged to the outside, and it is possible to prevent air from being stuck between the adherend W and the adhesive layer 50 and forming a bulge. , The pasting work becomes easy. Further, since it is attached to the adherend W only on the surface of the convex portion 52 with the space provided by the groove portion 51, it can be easily reattached.
As an example of this preferred embodiment, the groove portion 51 has a width of 300 μm, a depth of 20 μm, and an arrangement pitch of 1000 μm.

As the pressure-sensitive adhesive used for the pressure-sensitive adhesive layer 50, an appropriate pressure-sensitive adhesive can be selected from various known pressure-sensitive adhesives according to desired adhesive strength, durability, and other various performances.
Examples of the resin material as the main component of the pressure-sensitive adhesive include rubber-based resins made of natural rubber, isoprene rubber, butadiene acrylonitrile rubber, acrylic resin-based resins made of acrylic acid alkyl esters, methacrylic acid alkyl esters, and others. Polyvinyl butyral, ethylene-vinyl acetate-vinyl chloride graft polymer to which dioctylphthalate is added as a plasticizer, etc. are used. Further, if necessary, rosin, dammar, terpene modified product, etc. as a tackifier, isocyanate compound, etc. as a cross-linking agent, particles such as calcium carbonate, silica, talc, kaolinite, etc. as extender pigments, carbon black, titanium white, etc. as pigments, It is made by adding an appropriate amount of particles such as petals, chrome yellow, and phthalocyanine blue, and a benzotriazole-based compound and a triazine-based compound as an ultraviolet absorber.

The pressure-sensitive adhesive layer 50 is coated on one surface side of the antiviral agent-containing layer 10, 10 ′, or 10 ″ by a known coating method such as a roll coating method, a comma coating method, or a transfer method. And. The thickness of the pressure-sensitive adhesive layer 50 after coating is about 5 to 100 μm.
Here, the transfer method is a method in which a liquid composition of a pressure-sensitive adhesive containing a volatile solvent is once applied to a releaseable support sheet 60 to a desired thickness, and the pressure-sensitive adhesive layer applied after drying the solvent is applied. Due to the adhesive force, the anti-virus agent-containing layer 10, 10 ′, or 10 ″ is adhered together with the releasable support sheet 60 on one surface side, and then only the releasable support sheet 60 is adhered. It means an indirect coating method for forming the pressure-sensitive adhesive layer 50 on one desired surface of the anti-virus agent-containing layer by releasing the mold from the laminate of the agent layer and the anti-virus agent-containing layer and removing the mold. In such a transfer method, the solvent in the pressure-sensitive adhesive composition causes deterioration such as swelling and dissolution of the antiviral agent-containing layer 10, 10'or 10'itself, or deterioration or deterioration of the function of the antiviral agent. It is an effective coating method when obtaining.

<Releasable support sheet>
In the above preferred example in which a plurality of grooves 51 are formed on the surface of the pressure-sensitive adhesive layer 50 on the W side of the adherend (side of the releaseable support sheet 60), the pressure-sensitive adhesive is applied by a transfer method. Is preferable. This is because a plurality of groove portions 51 can be easily formed on the surface of the pressure-sensitive adhesive layer 50 on the W side of the adherend (on the side of the releasable support sheet 60). Hereinafter, the releasable support sheet 60 in the case where a plurality of groove portions 51 are formed on the surface of the pressure-sensitive adhesive layer 50 on the W side of the adherend (on the side of the releasable support sheet 60) by a transfer method will be described.

As shown in FIG. 6A, the releasable support sheet 60 is laminated on the surface of the pressure-sensitive adhesive layer 50 opposite to the antiviral agent-containing layer 10 side (back surface side). The releasable support sheet 60 can be easily peeled off from the pressure-sensitive adhesive layer 50. Further, the releasable support sheet 60 is provided in consideration of handleability until the antiviral adhesive sheet 100 is attached to the adherend W, and the attachment surface 50a of the adhesive layer 50 is provided. It has a function to protect.

As the releasable support sheet 60, various forms such as a conventionally known releasable film, separate paper, separate film, release film, and release paper can be appropriately used. For example, the releasable support sheet 60 may be made of high-quality paper, coated paper, impregnated paper, plastic film, or the like having a releasable layer formed on one side or both sides. The release layer is not particularly limited as long as it is a material having releasability, and for example, silicone resin, organic resin modified silicone resin, fluororesin, aminoalkyd resin, melamine resin, acrylic resin, polyester resin and the like can be used. Can be mentioned. As these resins, any of emulsion type, solvent type and solvent-free type can be used.
When using a release film provided with a release layer, for example, a silicone release type PET (polyethylene terephthalate) film, an untreated PET film, a PP (polypropylene) film, a silicone release type paper, or the like should be used. Can be done.

As shown in FIG. 6A, the releasable support sheet 60 has a large number of streaky convex portions 61 formed on the surface of the adhesive layer 50 side by embossing, printing, or the like. The convex portions 61 have a shape corresponding to the groove portion 51 of the pressure-sensitive adhesive layer 50, and are arranged at predetermined intervals in the directions corresponding to the first direction d1 and the second direction d2.

The thickness of the releasable support sheet 60 is preferably 10 μm or more and 100 μm or less, and more preferably 20 μm or more and 60 μm or less. When the thickness of the releasable support sheet 60 is less than 10 μm, there is no stiffness and it becomes difficult to peel off. Further, if the thickness of the releasable support sheet 60 exceeds 100 μm, the stiffness is too strong and the workability at the time of sticking is lowered. From these viewpoints, the thickness of the releasable support sheet 60 is preferably in the above range.

A method of attaching the antiviral adhesive sheet 100 of the present preferred form to the adherend W will be described.
First, as shown in FIG. 6B, the releasable support sheet 60 is peeled off from the antiviral adhesive sheet 100.
Then, as shown in FIG. 4, the sticking surface 50a of the pressure-sensitive adhesive layer 50 is brought into close contact with the adherend W, and pressure is appropriately applied. As a result, the anti-virus adhesive sheet 100 is attached to the adherend W.

At this time, as shown in FIG. 4, the top surfaces of the large number of convex portions 52 of the pressure-sensitive adhesive layer 50 are in close contact with the surface of the adherend W, and the portion corresponding to the bottom of the groove portion 51 is the adherend W. It is kept away from the surface. That is, a space is formed by the groove 51 between the adherend W and the pressure-sensitive adhesive layer 50. By forming such a space, water vapor appearing on the surface of the adherend W due to rainfall, moisture absorption, etc., water vapor released from the surface of the adherend W, etc. pass through this space and become an anti-virus. The adhesive sheet 100 is easily and efficiently discharged to the outside from the end portion or the like.
Therefore, it is possible to suppress swelling and peeling of the surface of the antiviral agent-containing layer 10 due to water vapor, deterioration due to rust and corrosion of the adherend due to residual moisture, generation of mold, and the like, and the antiviral agent-containing layer 10 is high. It can be attached to the adherend while maintaining its durability.

Further, by forming such a space, air can be easily discharged to the outside, and it is possible to prevent air from being stuck between the adherend and the pressure-sensitive adhesive layer 50 and forming a bulge. , The pasting work becomes easy.
Further, since it is attached to the adherend only on the surface of the convex portion 52 with the space provided by the groove portion 51, it can be easily reattached.

<Base material>
The form of the base material may be a flat plate such as a film, a sheet or a plate, and is not particularly limited.
In addition, films, sheets and boards are often referred to as films, sheets and boards in order from the one having a relatively thin thickness, but in the present specification, these three are not distinguished unless otherwise specified. ..

Examples of the constituent material of the base material include resins, metals, non-metal inorganic materials, fibrous materials, wood-based materials, and the like, which can be appropriately selected depending on the intended use.

The base material may be a single layer, or may be a stack of two or more layers made of the above materials. In the case of a laminated body having two or more layers of the base material, it is preferable that two or more layers of different materials are laminated to complement each other's various performances of the materials of each layer. Examples of the base material formed by laminating two or more layers include the following A to J. In addition, "/" indicates the interface of each layer.
(A) Resin / wood-based material (B) resin / metal (C) resin / fibrous material (D) resin / non-metal inorganic material (E) resin 1 / resin 2
(F) Metal / Wood-based material (G) Metal / Non-metal Inorganic material (H) Metal / Fibrous material (I) Metal 1 / Metal 2
(J) Non-metal inorganic material / fibrous material

In the above E, the resin 1 and the resin 2 represent different types of resins (for example, the resin 1 is an olefin resin and the resin 2 is an acrylic resin). Further, in the above H, the metal 1 and the metal 2 represent different kinds of metals (for example, the metal 1 is copper and the metal 2 is chromium).

Further, when the base material is a laminated body such as A to J, a layer (adhesive layer or the like) for strengthening the adhesive force may be provided between the layers of each constituent layer of the laminated body. ..

Examples of the resin used as the base material include those made of various synthetic resins or natural resins. As the synthetic resin, a thermoplastic resin and a curable resin can be used.

Examples of the thermoplastic resin include the thermoplastic resin exemplified as the binder resin of the antiviral agent-containing layer.
Examples of the curable resin include thermosetting resins and ionizing radiation curable resins exemplified as binder resins for the antiviral agent-containing layer.
Examples of the natural resin include natural rubber, pine fat, amber and the like.

Metals used as a base material include, for example, alloys containing aluminum such as aluminum or duralumin, alloys containing iron such as iron or carbon steel and stainless steel, alloys containing copper such as copper or brass and bronze, gold and silver. , Chromium, nickel, cobalt, tin, titanium and the like. Further, as the metal base material, those obtained by plating or the like with these metals can also be used.

Examples of non-metal inorganic materials used as a base material include non-ceramic ceramic materials such as cement, ALC (lightweight cellular concrete), gypsum, calcium silicate, and wood piece cement, and ceramic materials such as ceramics, earthenware, glass, and hollow. Examples include ceramic materials, natural stones such as limestone (including marble), granite, and Anshan rock.

Fibrous materials used as base materials include, for example, thin leaf paper, kraft paper, high-quality paper, Japanese paper, titanium paper, linter paper, sulfate paper, paraffin paper, parchment paper, glassin paper, wallpaper backing paper, board paper and plaster board. Examples thereof include woven fabrics or non-woven fabrics made of paper such as base paper, polyester resin fibers, acrylic resin fibers, protein-based or cellulose-based natural fibers such as silk, cotton and linen, glass fibers, carbon fibers and the like. For these papers, acrylic resin, styrene-butadiene rubber, melamine resin, urethane resin, etc. The resin may be added (impregnated with the resin after the papermaking or filled in at the time of the papermaking). Examples of the paper to which the resin is added include inter-paper reinforced paper and resin-impregnated paper.
Further, as an example of a base material in which a resin layer is laminated on a fibrous material layer, a resin layer such as a vinyl chloride resin layer, an olefin resin layer, or an acrylic resin layer is formed on the surface of a backing paper for wallpaper, which is often used in the field of building materials. Examples include the original wallpaper of laminated wallpaper.

Examples of the wood-based material used as the base material include cedar, cypress, pine, oak, lauan, teak, and rubber wood. Examples of the form of the base material of the wood-based material include single plate, plywood, laminated wood, particle board, veneer and the like.

The shape and dimensions of the base material are not particularly limited and may be appropriately selected depending on the intended use, desired performance and processing suitability.
When the base material is a flat plate of a film, a sheet or a plate, the thickness is a typical design dimension of the article. The thickness is not particularly limited, but is generally set to about 10 μm or more and 10 cm or less from the viewpoint of manufacturing processability, mechanical strength, usability, and economy. In the case of a film or sheet form, a film having a size of 20 μm or more and 500 μm or less is usually selected, and in the case of a plate form, a film having a size of 1 mm or more and 2 cm or less is usually selected.

The base material is applied to one or both sides of the base material in order to improve the adhesion to the other layers constituting the antiviral agent-containing layer 10 single layer or the adhesion to the member to be laminated with the antivirus adhesive sheet 100. , Physical surface treatment such as oxidation method, unevenness method, or surface treatment such as chemical surface treatment can be applied.
Examples of the oxidation method include corona discharge treatment, chromium oxidation treatment, flame treatment, hot air treatment, ozone-ultraviolet treatment method and the like, and examples of the unevenness method include sandblasting method and solvent treatment method. These surface treatments are appropriately selected depending on the type of the base material, but in general, the corona discharge treatment method is preferably used from the viewpoint of the effect and operability of the surface treatment.

<Adhesive layer>
The adhesive constituting the adhesive layer 30 for laminating the antiviral agent-containing layer 10 single layer on the base material 20 is a general-purpose adhesive such as a moisture-curable adhesive, an anaerobic curable adhesive, and a dry material. Examples thereof include a curable adhesive, a UV curable adhesive, a heat-sensitive adhesive (for example, a hot melt type adhesive), and a pressure-sensitive adhesive similar to that exemplified in the pressure-sensitive adhesive layer 50. Examples of the various adhesives described above include urethane-based adhesives, acrylic-based adhesives, epoxy-based adhesives, rubber-based adhesives, and the like, and among these, urethane-based adhesives are preferable in terms of adhesive strength. ..

Examples of the urethane-based adhesive include an adhesive using a two-component curable urethane resin containing various polyol compounds such as a polyether polyol, a polyester polyol, and an acrylic polyol, and a curing agent such as an isocyanate compound.

The thickness of the adhesive layer is preferably 0.1 μm or more and 60 μm or less, more preferably 1 μm or more and 50 μm or less, and further preferably 5 μm or more and 40 μm or less.

<Second base material>
Examples of the second base material include the same base materials as those described above.
The second substrate is often used as a support for forming an antiviral agent-containing layer monolayer. Therefore, the second base material is preferably a resin base material because of its handleability. The thickness of the second base material is preferably 10 to 300 μm, more preferably 20 to 200 μm, and even more preferably 30 to 150 μm in terms of handleability.

<Antiviral activity value>
The antiviral adhesive sheet 100 of the present embodiment preferably has an antiviral activity value of 2.0 or more as measured by the following method. The following method is an ISO 21702 compliant method.

<< Measurement method of antiviral activity value >>
0.4 ml of virus solution is added dropwise to a 5 cm square test piece (antiviral processed product and unprocessed product), and the test piece is covered with a 4 cm square film. This test piece was allowed to stand at 25 ° C for 24 hours. After standing, the virus on the test piece is washed out and collected, and the virus infectivity titer is measured. The antiviral activity value is calculated by the following formula (1).
R = Ut-At (1)
R: Anti-virus activity value Ut: Average of common logarithms of virus infectious titer (PFU / cm ² ) after 24-hour standing of unprocessed product At: Virus infectious tit of anti-virus processed product after 24-hour standing (PFU) / Cm ² ) Average of common logarithms

<Haze>
In the form in which the antiviral pressure-sensitive adhesive sheet 100 of the present embodiment has transparency, there are cases where high haze such as cloudy glass is required and cases where low haze is required. When low haze is required, the haze is preferably 30% or less, more preferably 20% or less. The haze means the haze defined in JIS K7136: 2000. In order to reduce the haze, it is necessary to reduce the difference between the refractive index of the antiviral agent and the refractive index of the binder resin, reduce the content of the antiviral agent, and reduce the thickness of the antiviral agent-containing layer. preferable.

<Use>
The anti-virus adhesive sheet 100 of the present disclosure covers, for example, various members, products, daily living spaces, places of business or sales activities, medical sites, etc., where anti-virus properties should be imparted, as described below. Make it a body. It can be suitably used when imparting antiviral properties to the surface of such an adherend relatively easily and in a short time even if the person is not a skilled worker.
(1) The surface of interior parts such as walls, floors, and ceilings of buildings such as houses, offices, stores, hospitals, and clinics.
(2) The surface of exterior parts such as outer walls, roofs, eaves ceilings, and door pockets of buildings such as houses, offices, stores, hospitals, and clinics.
(3) Surfaces of fittings (interior or exterior parts) such as windows, window frames, doors, door frames; surfaces of fixtures (handles, etc.); surfaces of fitting jigs.
(4) Handrails, waist walls, surrounding edges, thresholds, lintels, and the surface of Kasagi's building members.
(5) The surface of outdoor (exterior) parts such as fences, gates, pillars of clotheslines and handrails.
(6) Surface materials for furniture such as chests of drawers, desks, chairs, cupboards, and kitchen sinks; surface materials for furniture accessories (handles, etc.); surfaces of furniture jigs.
(7) Surface materials for housings of various home appliances such as television receivers, radio receivers, refrigerators, microwave ovens, washing machines, fans, air conditioners, etc .; Accessories (handles, switches, touch panels, etc.) of home appliances Surface material; The surface of home appliance jigs.
(8) Surface materials of OA equipment such as various computer equipment such as electronic copying machines, facsimiles, printers, and personal computers; Surfaces of housings of various OA equipment of ATM equipment of financial institutions such as banks and post offices; Surface of accessories (keyboard, keyboard, touch panel, etc.) of equipment; Surface of jigs of various OA equipment.
(9) The surface of interior or exterior parts (walls, floors, ceilings, handrails, columns, control panels, levers, handles, steering wheels, and other control equipment) of vehicles such as automobiles and railroad vehicles, ships, and aircraft.
(10) Partitions of various buildings; Shielding plates or curtains to prevent virus droplet infection at stores, offices, windows of government offices, checkout locations, etc .; Protective surfaces (face guards), protective glasses (goggles) Face protectors such as; or these surfaces.
(11) Business forms such as slips; passbooks; cards such as cash cards, credit cards, and point cards of financial institutions; or their surfaces.
(12) Bottles of glass, resin, etc .; metal cans; resin flexible packaging materials such as resin retort containers; packaging materials such as various tubes; or their surfaces.

The above (6) illustrates a case where the antiviral adhesive sheet 100 of the present disclosure is applied with a desk as an adherend. In this case, it is preferable to apply the anti-virus adhesive sheet 100 to the work surface (horizontal plane) of the desk, and in that case, it is preferable that the anti-virus adhesive sheet 100 can be used as it is as a desk mat. In the example where the antiviral adhesive sheet 100 is used as a desk mat, the antiviral agent-containing layer 10 constitutes the surface of the desk mat when it is used.

100: Antiviral adhesive sheet 10, 10', 10': Antiviral agent-containing layer 11: Binder resin 12: Antiviral agent 20: Base material 30: Adhesive layer 40: Second base material 50: Adhesive layer 60: Releasable support sheet

Claims (2)

An antiviral adhesive sheet formed by laminating an adhesive layer on one side surface of an antiviral agent-containing layer. The antiviral pressure-sensitive adhesive sheet according to claim 1, wherein a plurality of grooves are formed on the surface of the pressure-sensitive adhesive layer opposite to the side surface of the antiviral agent-containing layer.

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