How to use adhesive sheets and adhesive sheets

Abstract

To provide a method of using an adhesive sheet capable of making a surface of a target object sufficiently clean when necessary, and to provide an adhesive sheet capable of making a surface of a target object sufficiently clean when necessary.SOLUTION: A method of using an adhesive sheet of the present invention includes the steps of: preparing an adhesive sheet comprising a substrate and an adhesive layer containing at least one active ingredient selected from a group consisting of an antibacterial agent and an antiviral agent; attaching the adhesive sheet to a surface of an adherend; holding the adhesive sheet attached to the adherend for a predetermined time or more; and peeling the adhesive sheet off the adherend.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a method for using a pressure-sensitive adhesive sheet and a pressure-sensitive adhesive sheet. [Background technology]

[0002] In recent years, people have become more conscious of hygiene and cleanliness, and there is a tendency to demand cleanliness in areas other than visible dirt.

[0003] For example, areas that are frequently touched by many people are prone to bacteria and viruses adhering to them, making them less clean. To keep these areas clean, it is desirable to clean them after each use, but cleaning them after each use is extremely troublesome. Therefore, there is a demand for reducing the frequency of cleaning. Accordingly, a paint has been proposed that can impart antibacterial properties to the surface of an item by applying it to the surface (see, for example, Patent Document 1).

[0004] However, the surface of an article coated with an antibacterial paint is exposed to the elements and may not be kept sufficiently clean. Furthermore, the formation of a coating film on the surface of an article that requires antibacterial properties may impair the texture and other properties of the article. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 08-209064 Summary of the Invention [Problem to be solved by the invention]

[0006] The object of the present invention is to provide a method for using an adhesive sheet that can keep the surface of a target body sufficiently clean when necessary, and to provide an adhesive sheet that can keep the surface of a target body sufficiently clean when necessary. [Means for solving the problem]

[0007] Such objectives are as follows: (1) 8 This is achieved by the present invention described in (1) preparing a pressure-sensitive adhesive sheet comprising a substrate and a pressure-sensitive adhesive layer containing at least one active ingredient selected from the group consisting of antibacterial agents and antiviral agents; a step of adhering the pressure-sensitive adhesive sheet to the surface of an adherend; a step of maintaining the pressure-sensitive adhesive sheet attached to the adherend for a predetermined period of time or more; and peeling the pressure-sensitive adhesive sheet from the adherend. death, The pressure-sensitive adhesive layer contains, as the active ingredient, at least a salt obtained by reacting a metal salt with an alkali salt of a molybdenum oxo compound. A method for using an adhesive sheet.

[0008] (2) The method for using the pressure-sensitive adhesive sheet according to (1) above, wherein the predetermined time is 10 minutes or more.

[0009] (3) The pressure-sensitive adhesive layer contains, as the active ingredient, moreover A method for using the adhesive sheet according to (1) or (2) above, which contains a silver salt.

[0011] ( 4 The content of the active ingredient in the pressure-sensitive adhesive layer is 0.5% by mass or more and 10% by mass or less in the above (1) to ( 3 ) A method for using the adhesive sheet described in any one of the above.

[0012] ( 5 ) The adhesive strength of the adhesive layer to the surface of the stainless steel plate is 0.02 N / 25 mm or more and 30 N / 25 mm or less according to any one of (1) to ( 4 ) A method for using the adhesive sheet described in any one of the above.

[0013] ( 6 The pressure-sensitive adhesive sheet is any one of the above (1) to (3) in which information is written in a visible area when the sheet is attached to the adherend. 5 ) A method for using the adhesive sheet described in any one of the above.

[0014] ( 7 ) The information is the information on how to use the pressure-sensitive adhesive sheet. 6 ) A method for using the adhesive sheet described in

[0015] ( 8 a PSA sheet that is peeled off from an adherend after being stuck to the surface of the adherend for a predetermined period of time or more, The adhesive layer comprises a substrate and at least one active ingredient selected from the group consisting of antibacterial agents and antiviral agents. 、 The pressure-sensitive adhesive layer contains, as the active ingredient, at least a salt obtained by reacting a metal salt with an alkali salt of a molybdenum oxo compound. A pressure-sensitive adhesive sheet characterized by: [Effects of the Invention]

[0016] According to the present invention, it is possible to provide a method for using an adhesive sheet that can keep the surface of a target body sufficiently clean when necessary, and to provide an adhesive sheet that can keep the surface of a target body sufficiently clean when necessary. [Brief explanation of the drawings]

[0017] [Figure 1] 1 is a schematic longitudinal sectional view showing a preferred embodiment of a pressure-sensitive adhesive sheet according to the present invention. [Figure 2] 1 is a schematic longitudinal cross-sectional view showing an adherend to which a pressure-sensitive adhesive sheet is applied. [Figure 3] FIG. 2 is a schematic vertical cross-sectional view showing a state in which the pressure-sensitive adhesive sheet is attached to an adherend. [Figure 4] FIG. 2 is a schematic plan view showing the pressure-sensitive adhesive sheet attached to an adherend. [Figure 5] FIG. 2 is a schematic vertical cross-sectional view showing the pressure-sensitive adhesive sheet peeled off from the adherend. DETAILED DESCRIPTION OF THE INVENTION

[0018] Preferred embodiments of the present invention will be described in detail below. Fig. 1 is a schematic longitudinal sectional view showing a preferred embodiment of a pressure-sensitive adhesive sheet according to the present invention. Fig. 2 is a schematic longitudinal sectional view showing an adherend to which the pressure-sensitive adhesive sheet is applied. Fig. 3 is a schematic longitudinal sectional view showing a state in which the pressure-sensitive adhesive sheet has been attached to an adherend. Fig. 4 is a schematic plan view showing a state in which the pressure-sensitive adhesive sheet has been attached to an adherend. Fig. 5 is a schematic longitudinal sectional view showing a state in which the pressure-sensitive adhesive sheet has been peeled off from the adherend.

[0019] [1] How to use the adhesive sheet Hereinafter, a method for using the pressure-sensitive adhesive sheet of the present invention will be described.

[0020] The method of using the adhesive sheet 10 of this embodiment includes an adhesive sheet preparation step of preparing an adhesive sheet 10 having a substrate 11 and an adhesive layer 12 containing at least one active ingredient selected from the group consisting of antibacterial agents and antiviral agents; an attachment step of attaching the adhesive sheet 10 to the surface of the target object, that is, an adherend 100; a holding step of maintaining the adhesive sheet 10 attached to the adherend 100 for a predetermined period of time or longer; and a peeling step of peeling the adhesive sheet 10 from the adherend 100.

[0021] This provides a method of using the adhesive sheet 10 that can keep the surface of the object sufficiently clean when necessary. Furthermore, because the adhesive sheet 10 is peeled off from the adherend 100 when necessary, the texture and the like of the adherend 100 are not impaired.

[0022] Examples of the time when it is necessary include when performing an action or task that involves movement that may result in contact with the surface of an object, and particularly when using the adherend 100 by touching it.

[0023] In the present invention, the term "antibacterial" should be interpreted in the broadest sense, including killing or eliminating bacteria and fungi, or inhibiting their occurrence, growth, and proliferation, and is not limited in any way.

[0024] Furthermore, the term "antiviral" should be interpreted in the broadest sense, including prevention of viral infection, inactivation of viruses, and inhibition of viral proliferation, and is not limited in any way. In this specification, the term "sheet" includes the concept of film.

[0025] Each step will be described in detail below. [1-1] Adhesive sheet preparation process In the pressure-sensitive adhesive sheet preparation step, a pressure-sensitive adhesive sheet 10 is prepared, which includes a substrate 11 and a pressure-sensitive adhesive layer 12 containing at least one active ingredient selected from the group consisting of antibacterial agents and antiviral agents.

[0026] The adhesive sheet 10 prepared in this step may comprise a substrate 11 and an adhesive layer 12 containing at least one active ingredient selected from the group consisting of antibacterial agents and antiviral agents, but it is preferable that the adhesive layer 12 is protected by a release liner 13, as shown in FIG. 1.

[0027] This effectively prevents dust and the like from adhering to the pressure-sensitive adhesive layer 12 before the subsequent application step. Furthermore, when the pressure-sensitive adhesive layer 12 contains a volatile component, the volatile component can be effectively prevented from unintentionally volatilizing before the application step. In particular, when the volatile component is the active ingredient, it is preferable that the pressure-sensitive adhesive layer 12 be protected by the release liner 13 in order to more effectively exert the effects of the present invention. The adhesive sheet 10 will be described in detail later.

[0028] [1-2] Pasting process In the adhering step, the pressure-sensitive adhesive sheet 10 is adhered to the surface of the adherend 100 so that the pressure-sensitive adhesive layer 12 is in contact with the surface.

[0029] When the pressure-sensitive adhesive sheet 10 has a release liner 13, the release liner 13 is peeled off from the pressure-sensitive adhesive layer 12 before application.

[0030] [1-2-1] Adherent The constituent material of the adherend 100 to which the adhesive sheet 10 is attached is not particularly limited, but it is preferable that the surface of the adherend 100 (the portion in contact with the adhesive layer 12) be made of wood, glass, metal, or plastic.

[0031] This allows the pressure-sensitive adhesive sheet 10 to be suitably peeled from the adherend 100 in the subsequent peeling step.

[0032] Examples of metals that can be used as the surface material of the adherend 100 include stainless steel and aluminum.

[0033] Examples of plastics that can be used as a material for forming the surface of the adherend 100 include polyesters such as polyethylene terephthalate, polyolefins such as polyethylene and polypropylene, acrylic resins, and various engineering plastics such as ABS resins.

[0034] The adherend 100 is not particularly limited, but may be, for example, an object having a part that is frequently touched by one or more people.

[0035] The surface of such an adherend 100 is easily contaminated by bacteria and viruses, and the effects of the present invention can be more significantly exhibited.

[0036] Specific examples of the substrate 100 include, but are not limited to, tables, chairs; countertops, cutting boards, trays; touch panels of mobile devices; operation panels, operation buttons, and remote controllers of electrical devices; landline telephones; doorknobs, handles, and handrails; toilet seats, lids, paper holders, and flush buttons; computer keyboards and mice; and karaoke microphones.

[0037] Examples of mobile terminals include tablets, mobile phones, smartphones, restaurant ordering terminals, and product management terminals.

[0038] Examples of electrical equipment include elevators, vending machines, air conditioners, televisions, lighting equipment, and ATMs (automated teller machines).

[0039] 2, dirt 101 containing bacteria and viruses is attached to the surface of an adherend 100. Dirt 101 containing bacteria and viruses is generally invisible to the naked eye, but is visualized in the attached drawings.

[0040] Then, as shown in FIG. 3, the adhesive sheet 10 is stuck to the adherend 100 with the adhesive layer 12 facing the adherend 100 so as to cover the stain 101.

[0041] The pressure-sensitive adhesive sheet 10 may be pre-cut according to the shape and size of the adherend 100 to which it is to be attached. This allows the attachment process to be carried out more efficiently.

[0042] Furthermore, after the adhesive sheet 10 is attached to the adherend 100, the adhesive sheet 10 may be cut according to the shape and size of the adherend 100.

[0043] After the pressure-sensitive adhesive sheet 10 is attached to the adherend 100, it is preferable to press the substrate 11 from above with a hand or the like.

[0044] This makes it possible to more reliably improve the adhesion between the pressure-sensitive adhesive layer 12 and the adherend 100, and more reliably exert the effects of the present invention.

[0045] 4, in this embodiment, the adhesive sheet 10 has a printed layer 14, and when the adhesive sheet 10 is attached to the adherend 100, information (information by the printed layer 14) is displayed in a visible area, particularly in an area that is visible when the adherend 100 is in use in its normal form. This information is, for example, information about how to use the adhesive sheet 10.

[0046] [1-3] Holding process In the holding step, the pressure-sensitive adhesive sheet 10 is held in a state of being attached to the adherend 100 for a predetermined period of time or longer.

[0047] Not only is the adhesive layer 12 containing the active ingredient brought into contact with the surface of the adherend 100, but the surface of the adherend 100 is kept in a state where the adhesive layer 12 is tightly adhered and covered for a predetermined period of time or more, thereby allowing the active ingredient to act sufficiently on the surface of the adherend 100, and as a result, the effects of the present invention are exerted.

[0048] The predetermined time is not particularly limited, but is preferably 10 minutes or more, more preferably 1 hour or more, and even more preferably 4 hours or more. This makes the above-mentioned effects more pronounced.

[0049] Methods for keeping the adhesive sheet 10 attached to the adherend 100 for a predetermined period of time or longer include, for example, attaching the adhesive sheet 10 to tables, chairs, and trays at a restaurant after closing time and peeling it off before opening on the next business day, or attaching the adhesive sheet 10 to toilet seats, etc. at a lodging facility after cleaning is completed after checkout and peeling it off before the next guest uses it.

[0050] This allows the pressure-sensitive adhesive sheet 10 to be reliably maintained adhered to the adherend 100 for a longer period of time, thereby achieving the above-mentioned effects more significantly.

[0051] [1-4] Peeling process In the peeling step, the pressure-sensitive adhesive sheet 10 is peeled off from the adherend 100 .

[0052] As shown in Fig. 5, peeling the adhesive sheet 10 from the adherend 100 allows the adherend 100 to be kept sufficiently clean. More specifically, by being in contact with the adhesive layer 12 for a predetermined period of time or longer, the adherend 100 is in a state in which the antibacterial and antiviral effects of the active ingredients are exerted. Furthermore, dirt originally attached to the surface of the adherend 100 can be transferred to the adhesive sheet 10 and removed. Furthermore, depending on the configuration of the adhesive layer 12, the active ingredients can remain on the surface of the adherend 100 even after peeling, allowing the antibacterial and antiviral properties to be favorably maintained for a relatively long period of time after the adhesive sheet 10 is peeled off.

[0053] The timing for peeling the pressure-sensitive adhesive sheet 10 from the adherend 100 is not particularly limited as long as it is after a predetermined time has elapsed, but it is preferable to peel the pressure-sensitive adhesive sheet 10 from the adherend 100 immediately before the adherend 100 is to be used.

[0054] This prevents the surface of the adherend 100 from becoming contaminated again between the time the pressure-sensitive adhesive sheet 10 is peeled off and the time of use, and allows the adherend 100 to be used in a cleaner state.

[0055] [2] Adhesive sheet The adhesive sheet 10 according to the present invention will be described in detail below.

[0056] The adhesive sheet 10 is adhered to the surface of the target object, that is, the adherend 100, for a predetermined period of time or more, and is then peeled off from the adherend 100. The adhesive sheet 10 comprises a substrate 11 and an adhesive layer 12 containing at least one active ingredient selected from the group consisting of antibacterial agents and antiviral agents.

[0057] This makes it possible to provide an adhesive sheet 10 that can keep the surface of the object sufficiently clean when necessary. Furthermore, because the adhesive sheet 10 is peeled off from the adherend 100 when necessary, the texture and the like of the adherend 100 are not impaired.

[0058] As shown in FIG. 1, adhesive sheet 10 has substrate 11 and adhesive layer 12 provided on one surface of substrate 11.

[0059] [2-1] Base material The substrate 11 is a single layer body having a first surface 111 that faces the front side when the pressure-sensitive adhesive sheet 10 is attached to the adherend 100, and a second surface 112 that faces the pressure-sensitive adhesive layer 12. The substrate 11 has the function of supporting the pressure-sensitive adhesive layer 12 .

[0060] The substrate 11 may be made of any material, and examples of the material for the substrate 11 include various resin materials, paper-based materials, and metal materials.

[0061] Examples of resin materials constituting the substrate 11 include polyolefins such as polyethylene, polypropylene, ethylene-propylene copolymer, ethylene-vinyl acetate copolymer, ethylene-methyl acrylate copolymer, ethylene-ethyl acrylate copolymer, ethylene-butyl acrylate copolymer, ethylene-methacrylic acid copolymer, and ethylene-methyl methacrylate copolymer; acrylic resins; vinyl acetate resins; polyesters such as polyethylene terephthalate (PET), polybutylene terephthalate, and polyethylene naphthalate; acetate resins, acrylonitrile-butadiene-styrene copolymer (ABS) resin, polystyrene, polyvinyl chloride, polyamide, polyesteramide, polyether, polyimide, polyamideimide, poly-p-phenylene sulfide, and polyether ester. One or a combination of two or more selected from these may be used, but the substrate 11 is preferably composed of a material containing at least one of polyester and polyolefin.

[0062] This allows the adhesive sheet 10 to have more suitable stiffness, and improves the ease of handling of the adhesive sheet 10 (for example, reducing the likelihood of wrinkling when applied to the adherend 100, or adhesion to unintended areas, etc.). Also, it is possible to effectively prevent unintended damage to the adhesive sheet 10 when peeling the adhesive sheet 10 from the adherend 100. Also, the state of the adherend 100 can be more easily recognized through the adhesive sheet 10.

[0063] Specific examples of substrate 11 made of a paper-based material include paper substrates such as glassine paper, coated paper, fine paper, dust-free paper, and impregnated paper, as well as laminated paper in which a thermoplastic resin such as polyethylene is laminated onto a paper substrate.

[0064] Furthermore, the substrate 11 may contain components other than the above-mentioned materials. Examples of such components include colorants such as dyes and pigments, antioxidants such as anilides and phenols, ultraviolet absorbers such as benzophenones and benzotriazoles, light stabilizers, modifiers, rust inhibitors, fillers, surface lubricants, corrosion inhibitors, heat stabilizers, lubricants, antistatic agents, polymerization inhibitors, crosslinking agents, catalysts, plasticizers, leveling agents, thickeners, softeners, dispersants, antibacterial agents, and antiviral agents.

[0065] Furthermore, at least one of the first surface 111 and the second surface 112 of the substrate 11 may be subjected to a surface treatment to enhance adhesion with the printed layer 14 and the adhesive layer 12.

[0066] This makes it possible to particularly increase the adhesion between the substrate 11 and the adhesive layer 12 relative to the adhesion between the adhesive layer 12 and the adherend 100, for example, and more effectively prevent the occurrence of adhesive residue when peeling the adhesive sheet 10 from the adherend 100, interfacial peeling between the substrate 11 and the adhesive layer 12, and unintended peeling between the substrate 11 and the adhesive layer 12.

[0067] Such surface treatments include polyester, acrylic, and polyurethane types. Examples of methods include a method of applying an easily adhesive resin and a corona treatment.

[0068] The thickness of the substrate 11 is not particularly limited, but is preferably 15 μm to 300 μm, more preferably 20 μm to 250 μm, and even more preferably 25 μm to 75 μm.

[0069] This allows the effects of having the substrate 11 as described above to be fully exerted, while, for example, further improving the ability of the adhesive sheet 10 to conform to the surface shape of the adherend 100, and ensures excellent adhesion even if the surface of the adherend 100 (the portion to which the adhesive sheet 10 is attached) is a curved surface with a small radius of curvature or an uneven surface.

[0070] [2-2] Adhesive layer The pressure-sensitive adhesive layer 12 is a single layer having a first surface 121 facing the substrate 11 and a second surface 122 opposite the first surface 121 (the surface in contact with the adherend 100).

[0071] The pressure-sensitive adhesive layer 12 is composed of a pressure-sensitive adhesive composition. In particular, in this embodiment, the pressure-sensitive adhesive composition contains a pressure-sensitive adhesive and at least one active ingredient selected from the group consisting of antibacterial agents and antiviral agents. In this way, the pressure-sensitive adhesive layer 12 adheres to the surface of the adherend 100, and has the function of fixing the pressure-sensitive adhesive sheet 10 to the adherend 100, as well as the function of retaining or carrying the active ingredient.

[0072] [2-2-1] Adhesive Examples of adhesives that form the adhesive layer 12 include acrylic adhesives, synthetic rubber adhesives, urethane adhesives, and silicone adhesives.

[0073] The acrylic pressure-sensitive adhesive may contain acrylic monomers as constituent monomers, or may contain non-acrylic monomers. However, the proportion of acrylic monomers in all monomers constituting the acrylic pressure-sensitive adhesive is preferably 50% by mass or more, more preferably 70% by mass or more, and even more preferably 90% by mass or more.

[0074] Specific examples of synthetic rubber-based adhesives include styrene-butadiene rubber, polyisobutylene rubber, isobutylene-isoprene, styrene-isoprene block copolymer, styrene-isoprene-styrene block copolymer, styrene-butadiene block copolymer, and styrene-ethylene-butylene block copolymer.

[0075] Specific examples of urethane-based adhesives include reaction products of polyester polyol or polyether polyol with polyisocyanate compounds.

[0076] Specific examples of silicone-based adhesives include those containing silicone rubber and silicone resin.

[0077] The adhesive constituting the adhesive layer 12 is not particularly limited, and examples thereof include solvent-based adhesives, emulsion-based adhesives, hot-melt adhesives, etc., but emulsion-based adhesives can improve the adhesive strength of the adhesive sheet 10 to the adherend 100 and the productivity of the adhesive sheet 10, while reducing the amount of organic solvent used in the manufacturing process of the adhesive sheet 10 and reducing the environmental burden.

[0078] The adhesive content in the adhesive layer 12 is not particularly limited, but is preferably 80% by mass or more and 98.5% by mass or less, more preferably 82% by mass or more and 98% by mass or less, and even more preferably 85% by mass or more and 97% by mass or less.

[0079] This allows the content of the active ingredient in the pressure-sensitive adhesive layer 12 to be sufficiently high, and while maintaining sufficient antibacterial and / or antiviral properties, the adhesive layer 12 can have improved adhesion to the substrate 11, and can more effectively prevent unintentional peeling of the pressure-sensitive adhesive layer 12 even when stress such as bending is applied. Furthermore, when the pressure-sensitive adhesive sheet 10 is peeled from the adherend 100, the pressure-sensitive adhesive layer 12 can be favorably peeled from the adherend 100.

[0080] [2-2-2] Active ingredient The active ingredient is at least one selected from the group consisting of antibacterial agents and antiviral agents, and imparts antibacterial and / or antiviral properties to the pressure-sensitive adhesive layer 12.

[0081] The content of the active ingredient in the adhesive layer 12 is not particularly limited, but is preferably 0.5% by mass or more and 10% by mass or less, more preferably 2% by mass or more and 8% by mass or less, and even more preferably 2.5% by mass or more and 6% by mass or less.

[0082] This allows the content of the active ingredient in the adhesive layer 12 to be set to an appropriate value, making the antibacterial and / or antiviral properties of the adhesive sheet 10 even better, and also allows the content of the adhesive in the adhesive layer 12 to be sufficiently high, making the adhesion of the adhesive layer 12 to the substrate 11 sufficiently excellent, and more effectively preventing the adhesive layer 12 from unintentionally peeling off even when stress such as bending is applied.

[0083] In the following description, for convenience, the active ingredient will be described separately as an antibacterial agent and an antiviral agent, but an ingredient having both antibacterial and antiviral properties may also be used as the active ingredient.

[0084] Any antibacterial agent having antibacterial properties or any antiviral agent having antiviral properties can be used as the active ingredient.

[0085] [2-2-2-1] Antibacterial agents Examples of antibacterial agents include various inorganic antibacterial agents, various organic antibacterial agents, and composite materials thereof (inorganic-organic hybrid antibacterial agents).

[0086] Examples of organic antibacterial agents include phenol ether antibacterial agents, imidazole antibacterial agents, pyrithione antibacterial agents, sulfone antibacterial agents, N-haloalkylthio compounds, anilide derivatives, pyrrole antibacterial agents, quaternary ammonium salts, pyridine compounds, triazine compounds, and thiazoline antibacterial agents (e.g., benzoisothiazoline compounds, isothiazolinone compounds).

[0087] More specifically, 1,2-benzisothiazolin-3-one, N-fluorodichloromethylthio-phthalimide, 2,3,5,6-tetrachloroisophthalonitrile, N-trichloromethylthio-4-cyclohexene-1,2-dicarboximide, 8-copper quinolinate, bis(tributyltin)oxide, 2-(4-thiazolyl)benzimidazole, methyl 2-benzimidazolecarbamate, 10,10'-oxybisphenoxyarsine, 2,3,5,6-tetrachloro-4-(methylsulfone)pyridin Examples of suitable amines include methyl methyl ether, bis(2-pyridylthio-1-oxide)zinc, N,N-dimethyl-N'-(fluorodichloromethylthio)-N'-phenylsulfamide, poly-(hexamethylenebiguanide) hydrochloride, dithio-2-2'-bis(benzmethylamide), 2-methyl-4,5-trimethylene-4-isothiazolin-3-one, 2-bromo-2-nitro-1,3-propanediol, hexahydro-1,3-tris-(2-hydroxyethyl)-S-triazine, and p-chloro-m-xylenol.

[0088] Furthermore, examples of organic antibacterial agents that may be used include natural antibacterial agents, such as chitosan, a basic polysaccharide obtained by hydrolyzing chitin contained in crab and shrimp shells, wasabi extract, and moso bamboo extract.

[0089] Examples of inorganic antibacterial agents include various metals such as silver, copper, zinc, iron, lead, bismuth, gold, platinum, titanium, and nickel.

[0090] Furthermore, examples of inorganic antibacterial agents include compounds of the above metals (metal compounds).

[0091] Examples of the metal compounds include oxides, sulfides, sulfates, acetates, and halides of the metals.

[0092] Furthermore, examples of antibacterial agents include those in which the above-mentioned metals, their ions (metal ions), or metal compounds are supported on a carrier.

[0093] Examples of the carrier include zeolites such as natural zeolite and synthetic zeolite; metal oxides such as aluminum oxide, magnesium oxide, titanium oxide, and zinc oxide; hydroxides or hydrous oxides such as hydrous titanium oxide, hydrous bismuth oxide, and hydrous antimony oxide; phosphates such as zirconium phosphate, titanium phosphate, calcium phosphate, apatite (apatite), magnesium phosphate, aluminum phosphate, manganese phosphate, and iron phosphate; carbonates such as calcium carbonate; silicates such as calcium silicate and magnesium silicate; titanic acids such as potassium titanate and calcium titanate; basic salts and composite hydrous oxides such as hydrotalcites; heteropolyphosphates such as ammonium molybdophosphate; hexacyanoferrate(III) salts; hexacyanozinc; alumina; silica; bentonite; clay; talc; mica; amino acids; and glass.

[0094] More specifically, examples of inorganic antibacterial agents in which a metal or metal ion is supported on a carrier include zeolite-based antibacterial agents, calcium silicate-based antibacterial agents, zirconium phosphate-based antibacterial agents, calcium phosphate-based antibacterial agents, zinc oxide-based antibacterial agents, soluble glass-based antibacterial agents, silica gel-based antibacterial agents, activated carbon-based antibacterial agents, titanium oxide-based antibacterial agents, titania-based antibacterial agents, organometallic antibacterial agents, ion exchange ceramic-based antibacterial agents, layered phosphate-quaternary ammonium salt-based antibacterial agents, and antibacterial stainless steel.

[0095] Examples of inorganic-organic hybrid antibacterial agents include antibacterial agents in which metal complex salts such as isothiazolinone compounds are supported on cation-exchangeable inorganic compounds.

[0096] This can further improve the antibacterial properties of the pressure-sensitive adhesive sheet 10. In addition, the antibacterial agent can be contained more uniformly in the pressure-sensitive adhesive layer 12, effectively preventing undesired variations in antibacterial properties from occurring at different locations.

[0097] The adhesive layer 12 preferably contains at least a silver salt. This makes it possible to improve the antibacterial properties, and such a component can also exhibit excellent antiviral properties. Examples of silver salts include silver nitrate, silver acetate, and silver sulfate.

[0098] Furthermore, the adhesive layer 12 preferably contains at least a salt obtained by reacting a metal salt with an alkali salt of a molybdenum oxo compound.

[0099] This makes it possible to improve the antibacterial properties, and such a component can also exhibit excellent antiviral properties.

[0100] Examples of the metal salt include silver salts, copper salts, and zinc salts. Examples of silver salts include silver nitrate, silver acetate, silver sulfate, etc. Examples of copper salts include copper nitrate, copper acetate, copper sulfate, etc. Examples of zinc salts include zinc nitrate, zinc acetate, zinc sulfate, etc. Among these, silver salts are preferred.

[0101] Examples of alkali salts of molybdenum oxo compounds include sodium molybdate, potassium molybdate, lithium molybdate, ammonium molybdate, sodium polymolybdate, and sodium isopolymolybdate.

[0102] The reaction between the metal salt and the molybdenum oxo compound can be carried out, for example, by adding an aqueous solution of an alkali salt of the molybdenum oxo compound to an aqueous solution of the metal salt, or vice versa.

[0103] The average particle size of the salt of a metal salt and a molybdenum oxo compound to be obtained can be varied by adjusting the reaction conditions. For example, to obtain a salt with a small average particle size, the average particle size can be controlled as desired by lowering the concentration of the aqueous alkali salt or metal salt solution of the molybdenum oxo compound or by increasing the stirring speed.

[0104] The salt of a metal salt and a molybdenum oxo compound thus obtained, having a preferred average particle size, can be suitably obtained as a powder by, for example, filtering off water from the reaction slurry and drying it.

[0105] In this way, by reacting at least one of the antibacterial metals silver, copper, and zinc with a molybdenum oxo compound to form a silver, copper, or zinc salt of the molybdenum oxo compound, appropriate elution properties of silver, copper, and zinc and a chemically stable ratio of silver, copper, and zinc are achieved, resulting in excellent antibacterial efficacy, long-lasting efficacy, and resistance to discoloration.

[0106] [2-2-2-2] Antiviral Agents The antiviral agent is not particularly limited as long as it has an antiviral effect, and examples thereof include organic antiviral agents and inorganic antiviral agents.

[0107] Examples of organic antiviral agents include antiviral resins, sulfonic acid surfactants, and copper alkoxides.

[0108] Examples of inorganic antiviral agents include supports in which silver ions, copper ions, zinc ions, or the like are supported by zeolite, silica gel, sulfonic acid surfactants, or the like; and metal oxides such as titanium oxide, tin oxide, and tungsten oxide.

[0109] The adhesive layer 12 preferably contains at least a silver salt. This makes it possible to improve the antiviral properties, and such a component can also exhibit excellent antibacterial properties. Examples of silver salts include silver nitrate, silver acetate, and silver sulfate.

[0110] The adhesive layer 12 preferably contains one or more salts obtained by reacting a metal salt with an alkali salt of a tungsten oxo compound.

[0111] This makes it possible to further improve the antiviral properties, and such a component can also exhibit excellent antibacterial properties.

[0112] The metal salts include one or more salts selected from the group consisting of silver, zinc, and copper.

[0113] Examples of silver salts include silver nitrate, silver acetate, silver sulfate, etc. Examples of zinc salts include zinc nitrate, zinc acetate, zinc sulfate, etc. Examples of copper salts include copper nitrate, copper acetate, copper sulfate, etc. Among these, silver salts are preferred.

[0114] Examples of alkali salts of tungsten oxo compounds include sodium tungstate, potassium tungstate, lithium tungstate, ammonium tungstate, sodium polytungstate, and sodium isopolytungstate.

[0115] The reaction between the metal salt and the alkali salt of the tungsten oxo compound can be carried out, for example, by adding an aqueous solution of the alkali salt of the tungsten oxo compound to an aqueous solution of the metal salt, or vice versa.

[0116] The average particle size of the salt of a metal salt and a tungsten oxo compound to be obtained can be changed by adjusting the reaction conditions. For example, to obtain a salt with a small average particle size, the average particle size can be controlled as desired by lowering the concentrations of the aqueous alkali salt solution of the tungsten oxo compound and the aqueous metal salt solution or by increasing the stirring speed.

[0117] The salt of the metal salt and the tungsten oxo compound preferably has an average particle size of 10 μm or less, which makes it possible to suppress the influence on the physical properties of the adherend 100 and to improve the antiviral properties.

[0118] The salt of the metal salt and the tungsten oxo compound thus obtained, having a preferred average particle size, can be obtained in powder form by filtering off the water from the reaction slurry and drying.

[0119] [2-2-2-3] State of the active ingredient in the adhesive layer The active ingredient as described above may be in a state of being compatible with the adhesive in the adhesive layer 12, for example, but is preferably dispersed in the adhesive layer 12 (in the adhesive).

[0120] This allows the active ingredients to exert their antibacterial and / or antiviral properties more effectively, and also allows the adhesive sheet 10 to exert its excellent antibacterial and / or antiviral properties for a longer period of time, thereby improving its durability.

[0121] In particular, it is preferable that the active ingredient contained in the adhesive layer 12 is in the form of particles, and the average particle size is 0.1 μm or more and 10 μm or less.

[0122] This allows the active ingredient to be more suitably dispersed in the pressure-sensitive adhesive layer 12, allowing the active ingredient to exhibit its antibacterial and / or antiviral properties more effectively. Furthermore, excellent antibacterial and / or antiviral properties can be exhibited for a longer period of time, improving the durability of the pressure-sensitive adhesive sheet 10.

[0123] Thus, the average particle size of the granular active ingredient is not particularly limited, but is preferably 0.1 μm or more and 10 μm or less, more preferably 0.3 μm or more and 7 μm or less, and even more preferably 0.5 μm or more and 5 μm or less. This makes the above-mentioned effects more pronounced.

[0124] In this specification, the average particle size refers to the average particle size on a volume basis. The average particle size can be determined, for example, by adding a sample to methanol, dispersing the dispersion for 3 minutes using an ultrasonic disperser, and measuring the dispersion using a Coulter counter particle size distribution analyzer (e.g., MULTISIZER3 manufactured by COULTER ELECTRONICS) with a 50 μm aperture.

[0125] The active ingredient may be uniformly contained in the pressure-sensitive adhesive layer 12, or may be unevenly distributed in a predetermined region. The active ingredient is preferably unevenly distributed in the outer surface of the pressure-sensitive adhesive layer 12, i.e., in the region on the second surface 122 side that comes into contact with the adherend 100, and it is particularly preferable that the outer surface of the pressure-sensitive adhesive layer 12 be the region in which the content of the active ingredient in the thickness direction of the pressure-sensitive adhesive layer 12 is greatest. This makes the above-mentioned effects even more pronounced.

[0126] [2-2-3] Other ingredients The adhesive layer 12 need only contain an adhesive and an active ingredient, and may also contain ingredients other than these (hereinafter also referred to as "other ingredients").

[0127] Examples of other components include crosslinkers, tackifiers, fillers, antioxidants, softeners, ultraviolet absorbers, light stabilizers, colorants, modifiers, rust inhibitors, flame retardants, hydrolysis inhibitors, surface lubricants, corrosion inhibitors, heat stabilizers, lubricants, antistatic agents, polymerization inhibitors, catalysts, leveling agents, thickeners, dispersants, and antifoaming agents.

[0128] Examples of the crosslinking agent include an isocyanate-based crosslinking agent, an epoxy-based crosslinking agent, and an aziridine-based crosslinking agent. Examples of the crosslinking agent include a crosslinking agent, a metal chelate crosslinking agent, an amine crosslinking agent, and an amino resin crosslinking agent, and one or more selected from these may be used in combination.

[0129] Examples of tackifiers include rosin resins, terpene phenol resins, terpene resins, aromatic hydrocarbon-modified terpene resins, petroleum resins, coumarone-indene resins, styrene resins, phenol resins, and xylene resins.

[0130] Examples of fillers include zinc oxide, titanium oxide, silica, calcium carbonate, and barium sulfate. Examples of the softener include process oil, liquid rubber, and plasticizer.

[0131] Examples of the antioxidant include anilide antioxidants, phenol antioxidants, and thioester antioxidants.

[0132] However, the content of other components in the pressure-sensitive adhesive layer 12 is preferably 10.0% by mass or less, and more preferably 5.0% by mass or less.

[0133] [2-2-4] Other conditions The thickness of the pressure-sensitive adhesive layer 12 is not particularly limited, but is preferably 5 μm or more and 100 μm or less, and more preferably 10 μm or more and 60 μm or less.

[0134] As a result, an adequate amount of the active ingredient can be contained in the adhesive layer 12, and the antibacterial property and / or antiviral property of the adhesive sheet 10 can be made more excellent. Further, the adhesive force of the adhesive layer 12 can be made more suitable, and the followability and adhesion to the shape of the surface of the adherend 100 can be improved. For example, even if the surface of the adherend 100 (the portion to which the adhesive sheet 10 is adhered) is a curved surface with a small radius of curvature or a surface with irregularities, excellent adhesion can be ensured, and the adhesive layer 12 can be more effectively prevented from being inadvertently peeled off. Further, when peeling the adhesive sheet 10 from the adherend 100, the adhesive layer 12 can be preferably peeled off from the adherend 100.

[0135] When the thickness of the base material 11 is T1 [μm] and the thickness of the adhesive layer 12 is T2 [μm], it is preferable to satisfy the relationship of 1 < T1 / T2, and more preferably to satisfy the relationship of 1.5 < T1 / T2 < 3.

[0136] As a result, the base material 11 can surely support the adhesive layer 12, and the bending or curving of the base material 11 and the deformation of the adhesive layer 12 can be more preferably performed. As a result, the above-described effects are more significantly exhibited.

[0137] Further, the adhesive force of the adhesive layer 12 with respect to the surface of the stainless steel plate is not particularly limited, but is preferably 0.02 N / 25 mm or more and 30 N / 25 mm or less, more preferably 0.1 N / 25 mm or more and 25 N / 25 mm or less, and further preferably 1 N / 25 mm or more and 20 N / 25 mm or less.

[0138] As a result, generally, while more effectively preventing the adhesive layer 12 from being inadvertently peeled off from the adherend 100 when adhered to various adherends 100, when peeling from the adherend 100, the peeling force does not become larger than necessary, and the adhesive layer 12 can be preferably peeled off.

[0139] The adhesive force can be measured in accordance with JIS Z0237:2009 at 23°C.

[0140] [2-3] Release liner The surface (second surface 122) of adhesive layer 12 of unused adhesive sheet 10 is covered with release liner 13.

[0141] This allows unused pressure-sensitive adhesive sheet 10 to be stored and transported in sheet form, making it easy to handle the pressure-sensitive adhesive sheet 10, and also providing suitable protection for the pressure-sensitive adhesive layer 12 before it is attached to adherend 100, effectively preventing adhesion of dust and the like during storage or transportation, and adhesion to undesired areas.

[0142] Examples of the release liner 13 include glassine paper coated with silicone, glassine paper or wood-free paper laminated with polyethylene and coated with silicone, and polyester film coated with silicone.

[0143] Furthermore, release liner 13 may also be used to support a plurality of individual pressure-sensitive adhesive sheets 10 that have been die-cut into individual pieces.

[0144] [2-4] Printing layer As shown in FIG. 1, adhesive sheet 10 has printed layer 14 provided on first surface 111 of substrate 11.

[0145] This allows information to be written in a visible location when the pressure-sensitive adhesive sheet 10 is attached to an adherend 100, as shown in FIG.

[0146] As a result, information can be provided to the observer, etc. In this specification, the concept of information includes not only pictures such as letters, symbols, marks, and characters, but also various patterns such as decorative patterns. The information may be, for example, simple color information, and the printing layer 14 may be a single-color solid print, etc.

[0147] The information (contents displayed by the printed layer 14) is not particularly limited, but is preferably information relating to how to use the adhesive sheet 10.

[0148] Such information regarding how to use the pressure-sensitive adhesive sheet 10 is not particularly limited, but may include, for example, information indicating that the surface of the adherend 100 is undergoing antibacterial and / or antiviral treatment (for example, "antibacterial and antiviral treatment in progress"). This prevents the sheet from being inadvertently removed by someone other than the person who applied it, without knowing that antibacterial and / or antiviral treatment is in progress.

[0149] Furthermore, the information may include, for example, information encouraging the user to peel off the adhesive sheet 10 from the adherend 100 before using the adherend 100 (for example, "Please peel off before use"). This can prevent the adherend 100 from being used with the adhesive sheet 10 still attached.

[0150] The information may also include, for example, time-related information. More specifically, examples include information about the start time of antibacterial and / or antiviral treatment (e.g., "treatment started at ____ / __ / __ / __ / __ / __ / __ / "), information about the timing at which the predetermined time period elapses (e.g., "please peel off after ____ / __ / __ / __ / __ / __ / __ / "), and information about the expiration date of the adhesive sheet 10 (e.g., "expiration date: ____ / __ / __ / __ / __ / __ / "), etc.

[0151] This can encourage users to use the adhesive sheet 10 in a more suitable manner, and can more effectively prevent it from being disposed of by mistake. At least a part of such information may be entered by the user or the like.

[0152] The printing layer 14 can be formed by various printing methods, such as flexographic printing, offset printing, gravure printing, screen printing, inkjet printing, laser beam dry electrophotographic printing, and melting or dye sublimation thermal transfer printing.

[0153] The ink used to form the printed layer 14 is not particularly limited, and examples thereof include oil-based ink, water-based ink, photocurable ink (ultraviolet-curable ink, electron beam-curable ink), etc. In particular, when the printed layer 14 is formed using photocurable ink, the preferable printed state can be maintained even when the adhesive sheet 10 is wet with water.

[0154] Examples of UV-curable inks include those containing oligomers such as epoxy acrylate, urethane acrylate, and polyester acrylate, colorants such as UV polymerization initiators and pigments, dispersants, additives, monofunctional or polyfunctional monomers, etc. When forming the printed layer 14 using UV-curable ink, the ink is printed and then cured by irradiating it with UV light from an ultraviolet (UV) lamp. Using photo-curable ink as the ink enables a solvent-free manufacturing process, allowing the printed layer 14 to be manufactured more cheaply and efficiently while being environmentally friendly. Furthermore, the time required for drying the ink can be eliminated, improving the productivity of the pressure-sensitive adhesive sheet 10.

[0155] In the illustrated configuration, the printed layer 14 is provided on the entire surface of the substrate 11, but the printed layer 14 may be provided on only a portion of the surface of the substrate 11.

[0156] [2-5] Manufacturing method of adhesive sheet The adhesive sheet 10 may be produced by any method, but can be suitably produced, for example, by a method comprising an adhesive composition application step of applying an adhesive composition that constitutes the adhesive layer 12 to a release liner 13, and a transfer step of coating the substrate 11 onto the adhesive composition applied to the release liner 13.

[0157] In the adhesive composition application step, an adhesive composition containing an adhesive and an active ingredient is applied to the release liner 13 .

[0158] Generally, the pressure-sensitive adhesive composition contains the above-mentioned crosslinking agent in advance, and further contains an emulsifier and other components added to the pressure-sensitive adhesive composition as needed.

[0159] The pressure-sensitive adhesive composition can be applied to the release liner 13 by a known coating method. As a coating method, for example, a method using a coating device such as a curtain coater, hot melt coater, die coater, knife coater, roll coater, roll knife coater, gravure coater, or air knife coater can be used.

[0160] In this step, water or organic solvent used for dilution may be removed from the PSA composition applied to the release liner 13 .

[0161] In the transfer step, the substrate 11 is coated on the pressure-sensitive adhesive composition applied to the release liner 13. As a result, the pressure-sensitive adhesive layer 12 formed from the pressure-sensitive adhesive composition is transferred to the substrate 11.

[0162] In the above explanation, the adhesive composition is applied to the release liner 13 and then transferred to the substrate 11, but the adhesive composition may also be applied directly to the substrate 11.

[0163] Furthermore, in the above explanation, a case where the adhesive layer 12 is formed using an adhesive composition containing an active ingredient has been described as a representative example, but the adhesive layer 12 may also be formed using an adhesive composition that does not contain an active ingredient, and the active ingredient may be diffused into the adhesive layer 12 by contacting the surface of the adhesive layer 12 with a composition containing the active ingredient.

[0164] Although the preferred embodiments of the present invention have been described above, the present invention is not limited to these.

[0165] For example, the pressure-sensitive adhesive sheet according to the present invention may have at least one intermediate layer between the substrate and the pressure-sensitive adhesive layer, and may have at least one coating layer provided on the outer surface side of the substrate.

[0166] In the above-described embodiment, the printed layer is provided on the outer surface of the substrate, i.e., on the surface opposite to the surface facing the pressure-sensitive adhesive layer. However, the location where the printed layer is formed is not particularly limited, and may be provided, for example, on the surface of the substrate facing the pressure-sensitive adhesive layer. In addition, when the substrate has an intermediate layer or a coating layer as described above, the printed layer may be provided on these surfaces. In addition, in the present invention, the pressure-sensitive adhesive sheet does not necessarily have to have a printed layer.

[0167] Furthermore, in the above-described embodiment, the case where the substrate is a single layer body has been described as a representative example, but the substrate may also be a laminate having a plurality of layers.

[0168] Furthermore, in the above-described embodiment, the pressure-sensitive adhesive layer is typically a single layer, but the pressure-sensitive adhesive layer may be a laminate including multiple layers.

[0169] Furthermore, for example, the pressure-sensitive adhesive sheet of the present invention may be produced by any method, and is not limited to those produced by the methods described in the above-described embodiments. [Explanation of symbols]

[0170] 10...Adhesive sheet 11...Base material 111...First side 112...Second Side 12...Adhesive layer 121...First side 122...Second Side 13...Release liner 14...printing layer 100…Adherent 101...dirt

Claims

1. A step of preparing a pressure-sensitive adhesive sheet including a substrate and a pressure-sensitive adhesive layer containing at least one active ingredient selected from the group consisting of antibacterial agents and antiviral agents; a step of adhering the pressure-sensitive adhesive sheet to the surface of an adherend; a step of maintaining the pressure-sensitive adhesive sheet attached to the adherend for a predetermined period of time or more; and peeling the pressure-sensitive adhesive sheet from the adherend, A method for using a pressure-sensitive adhesive sheet, wherein the pressure-sensitive adhesive layer contains, as the active ingredient, at least a salt obtained by reacting a metal salt with an alkali salt of a molybdenum oxo compound.

2. The method for using a pressure-sensitive adhesive sheet according to claim 1, wherein the predetermined time is 10 minutes or more.

3. The method for using a pressure-sensitive adhesive sheet according to claim 1 or 2, wherein the pressure-sensitive adhesive layer further contains a silver salt as the active ingredient.

4. The method for using a pressure-sensitive adhesive sheet according to claim 1 , wherein the content of the active ingredient in the pressure-sensitive adhesive layer is 0.5% by mass or more and 10% by mass or less.

5. 5. The method for using the pressure-sensitive adhesive sheet according to claim 1, wherein the adhesive strength of the pressure-sensitive adhesive layer to the surface of a stainless steel plate is 0.02 N / 25 mm or more and 30 N / 25 mm or less.

6. 6. The method for using a pressure-sensitive adhesive sheet according to claim 1, wherein the pressure-sensitive adhesive sheet has information printed on a portion that is visible when the pressure-sensitive adhesive sheet is attached to the adherend.

7. The method for using a pressure-sensitive adhesive sheet according to claim 6 , wherein the information is information regarding how to use the pressure-sensitive adhesive sheet.

8. a pressure-sensitive adhesive sheet that is peeled off from an adherend after remaining attached to the surface of the adherend for a predetermined period of time or more; A pressure-sensitive adhesive sheet comprising a substrate and a pressure-sensitive adhesive layer containing at least one active ingredient selected from the group consisting of antibacterial agents and antiviral agents, A pressure-sensitive adhesive sheet, wherein the pressure-sensitive adhesive layer contains, as the active ingredient, at least a salt obtained by reacting a metal salt with an alkali salt of a molybdenum oxo compound.

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