The main component is an antibacterial / antiviral resin.

Abstract

DEPCT68 The invention submitted is a principal component consisting of an antibacterial / antiviral resin. It can effectively reduce the activity of bacteria and viruses adhering to surfaces. The main components are antibacterial / antiviral resins that include resin-generated substrates, and... Antibacterial / antiviral agents are present in the substrate, the main component being an antibacterial resin. Antiviral agents with a charge concentration of 0 microcoulombs per square meter or more and less than 7 microcoulombs. Coulombs per square meter;

Description

Antibacterial and antiviral resin components

[0001] The present invention relates to an antibacterial and antiviral resin member capable of inactivating attached bacteria and viruses.

[0002] The COVID-19 pandemic has dramatically changed our lifestyles. Masks and disinfectants have become essential in everyday life, and antiviral products, which have previously only been of interest to medical professionals, are now of growing interest to ordinary consumers. Demand for air purifiers and air conditioners to improve indoor environments is particularly high, with increasing demand for products with antiviral capabilities in addition to antibacterial capabilities.

[0003] In order to solve these problems, molded products such as filters and antiviral films having antibacterial and antiviral properties have been developed (for example, Patent Documents 1, 2, and 3).

[0004] International Publication No. 2011 / 040048 JP 2005-007346 A JP 2021-066874 A

[0005] However, the resin materials used in filters are mainly highly water-repellent resins (substrates) such as polypropylene (PP), which is inexpensive and easy to process. Conventional antibacterial and antiviral resin members, in which an antibacterial or antiviral agent is simply fixed to the surface of the substrate, have poor contact efficiency with viruses and bacteria and do not have sufficient antibacterial or antiviral performance.

[0006] An object of the present invention is to provide an antibacterial and antiviral resin member that can efficiently inactivate bacteria and viruses attached to its surface.

[0007] As a result of extensive research, the inventors of the present invention have found that the amount of charge on the antibacterial and antiviral resin member is 0 μC / m ２ Above, 7μC / m ２ Less than, preferably 0 μC / m ２ Above, 0.7μC / m ２ It has been found that by making the thickness of the polymer less than 100 μm, the contact efficiency with bacteria and viruses can be improved, and the antibacterial and antiviral performance can be improved.

[0008] That is, the first invention includes a substrate formed of a resin and an antibacterial / antiviral agent contained in the substrate, and the amount of charge is 0 μC / m ２ Above, 7μC / m ２ The antibacterial and antiviral resin member is characterized in that the antibacterial and antiviral properties of the resin member are less than 100%.

[0009] A second invention is the antibacterial and antiviral resin member according to the first invention, characterized in that the surface of the base is coated with an O / W emulsion.

[0010] A third invention is the antibacterial and antiviral resin member according to the first invention, characterized in that an oil-soluble substance is attached to the surface of the base.

[0011] A fourth invention is the antibacterial and antiviral resin member according to the third invention, characterized in that the oil-soluble substance is one or more selected from the group consisting of liquid paraffin, mineral oil, and fatty acid ester.

[0012] A fifth invention is the antibacterial and antiviral resin member according to the third or fourth invention, characterized in that a surfactant is attached to the surface of the base.

[0013] A sixth invention is the antibacterial and antiviral resin member according to the fifth invention, characterized in that the surfactant is a nonionic surfactant.

[0014] A seventh invention is the antibacterial and antiviral resin member according to the sixth invention, characterized in that the nonionic surfactant is one or more selected from the group consisting of polyoxyalkyl ethers, polyoxyethylene alkyl ethers, and polyoxypropylene alkyl ethers.

[0015] According to the present invention, it is possible to provide an antibacterial and antiviral resin member that can efficiently inactivate bacteria and viruses attached to its surface.

[0016] An embodiment of the present invention will be described below.

[0017] The antibacterial and antiviral resin member of this embodiment includes a base body formed of resin and an antibacterial and antiviral agent contained in the base body, and has a charge amount of 0 μC / m ２ Above, 7μC / m ２ In this specification, the amount of electrostatic charge of the antibacterial and antiviral resin member refers to the amount of electrostatic charge measured by a method conforming to Method C (frictional electrostatic charge measurement method) of JIS L 1094:2020 "Test methods for electrostatic charge of woven and knitted fabrics" under conditions of a temperature of 20°C ± 2°C and a relative humidity of 40% ± 2% when an acrylic cloth made of acrylic fibers is used as the friction cloth.

[0018] The base constituting the antibacterial and antiviral resin member of this embodiment is a material for fixing the antibacterial and antiviral agent described below, and is made of resin.

[0019] Examples of resins that can be used as the material for the substrate include thermoplastic resins such as polyethylene resin, polypropylene resin, polystyrene resin, ABS resin, AS resin, AES resin, EVA resin, polymethylpentene resin, polyvinyl chloride resin, polyvinylidene chloride resin, polymethyl acrylate resin, polyvinyl acetate resin, polyamide resin, polyimide resin, polycarbonate resin, polyethylene terephthalate resin, polybutylene terephthalate resin, polyacetal resin, polyarylate resin, and polysulfone resin; thermoplastic elastomers such as silicone resin, styrene-based elastomers such as polystyrene elastomer, olefin-based elastomers such as polyethylene elastomer and polypropylene elastomer, polyurethane-based elastomers such as polyurethane elastomer, PVC-based elastomer, polyester-based elastomer, and nylon-based elastomer.

[0020] The resin constituting the substrate may be one type, or two or more types may be used.

[0021] The shape and form of the substrate constituting the antibacterial and antiviral resin member of this embodiment are not particularly limited, and may be a sheet-like object such as a woven fabric, knitted fabric, nonwoven fabric, sheet, or film, or may be a molded object molded into a predetermined shape.

[0022] The antibacterial and antiviral agent contained in the substrate is a substance that exhibits antibacterial and antiviral properties, and known organic or inorganic substances can be used.

[0023] Examples of organic antibacterial and antiviral agents include synthetic organic antibacterial and antiviral agents such as thiazoles, isothiazoles, imidazoles, pyridines, triazines, aldehydes, phenols, biguanides, nitriles, halogens, anilides, disulfides, thiocarbamates, organosilicon quaternary ammonium salts, quaternary ammonium salts, amino acids, organometallics, alcohols, carboxylic acids, and esters, as well as natural organic antibacterial and antiviral agents such as hinokitiol and chitosan.

[0024] Examples of inorganic antibacterial and antiviral agents include silver, copper, zinc, platinum, zinc compounds, silver compounds, copper compounds, metal oxide catalysts carrying metals or metal oxides, zeolites ion-exchanged with metal ions, activated carbon, mesoporous silica, and silica gel. The shape of the inorganic antibacterial and antiviral agent is not particularly limited, but from the viewpoint of further improving antibacterial and antiviral performance, it is preferable that the agent be in the form of fine particles. The particle size of the fine particles is not particularly limited, but from the viewpoint of further improving antibacterial and antiviral performance, it is preferable that the volume average particle size is 1.0 nm or more and 500 nm or less. Here, the volume average particle size can be measured, for example, by a laser Doppler method (dynamic electrophoretic light scattering method), and for the measurement, for example, a zeta potential / particle size measurement system (manufactured by Otsuka Electronics Co., Ltd.) can be used.

[0025] Among the above-mentioned antibacterial and antiviral agents, from the viewpoint of further improving antibacterial and antiviral performance, it is preferable to use an inorganic antibacterial and antiviral agent, it is more preferable to use a copper compound, and it is particularly preferable to use a monovalent copper compound. Inorganic antibacterial and antiviral agents can reduce the infectivity of or inactivate various viruses regardless of the type of genome, the presence or absence of an envelope, etc.

[0026] Examples of viruses that can be inactivated by the antibacterial and antiviral resin member of this embodiment include rhinovirus, poliovirus, foot-and-mouth disease virus, rotavirus, norovirus, enterovirus, hepatovirus, astrovirus, sapovirus, hepatitis E virus, influenza A, B, and C viruses, parainfluenza virus, mumps virus, measles virus, human metapneumovirus, respiratory syncytial virus, Nipah virus, Hendra virus, yellow fever virus, dengue virus, Japanese encephalitis virus, West Nile virus, hepatitis B and C viruses, eastern and western equine encephalitis virus, Onyong-nyong virus, rubella virus, Lassa virus, and Funin virus. Examples of such viruses include rabies, Machupo virus, Guanarito virus, Sabia virus, Crimean-Congo hemorrhagic fever virus, sandfly fever, hantavirus, Sin Nombre virus, rabies virus, Ebola virus, Marburg virus, bat lyssavirus, human T-cell leukemia virus, human immunodeficiency virus, human coronavirus, SARS coronavirus, human porvovirus, polyomavirus, human papillomavirus, adenovirus, herpesvirus, varicella-zoster virus, Epstein-Barr virus, cytomegalovirus, smallpox virus, monkeypox virus, cowpox virus, molluscipox virus, parapox virus, Zika virus, and the novel coronavirus.

[0027] Bacteria that can be inactivated by the antibacterial and antiviral resin member of this embodiment include various bacteria regardless of their properties, such as gram-positive or gram-negative, aerobic or anaerobic, and specific examples include Escherichia coli, Staphylococcus aureus, Staphylococcus epidermidis, streptococci, Streptococcus pneumoniae, Haemophilus influenzae, Bordetella pertussis, Salmonella enteritidis, Klebsiella pneumoniae, Pseudomonas aeruginosa, Vibrio, Salmonella enterica, Shigella, Bacillus anthrax, Mycobacterium tuberculosis, Clostridium botulinum, Clostridium tetani, and streptococci.

[0028] The antibacterial / antiviral agent contained in the substrate may be one type of substance, or two or more types of substances. For example, at least two types of substances, one that exhibits only antibacterial performance and the other that exhibits only antiviral performance, may be used as the antibacterial / antiviral agent, or at least one substance that exhibits both antibacterial and antiviral performance may be used. An example of an antibacterial / antiviral agent that exhibits both antibacterial and antiviral performance is a monovalent copper compound.

[0029] The form in which the antibacterial and antiviral agent is contained in the substrate is not particularly limited, and the agent may be dispersed within the substrate, at least a portion of the antibacterial and antiviral agent dispersed within the substrate may be exposed from the surface of the substrate, or the antibacterial and antiviral agent may be fixed to the surface of the substrate. From the viewpoint of increasing the contact efficiency between the antibacterial and antiviral agent and bacteria or viruses, the antibacterial and antiviral agent is preferably fixed to the surface of the substrate.

[0030] The content of the antibacterial and antiviral agent can be set as appropriate depending on the desired antibacterial and antiviral performance; for example, it can be set to 0.1% by mass or more and less than 80% by mass, and preferably 0.1% by mass or more and 15% by mass or less, relative to 100% by mass of the antibacterial and antiviral resin member.

[0031] In addition to the antibacterial and antiviral agent described above, the substrate may contain other components (hereinafter simply referred to as "other components") other than the antibacterial and antiviral agent. Examples of other components include plasticizers, desiccants, hardeners, antiskinning agents, flattening agents, anti-sagging agents, antifungal agents, ultraviolet absorbers, heat absorbers, lubricants, surfactants, thickeners, viscosity adjusters, stabilizers, dryness adjusters, pigments, dispersants, antifungal compositions, antiallergen compositions, catalysts, antireflective materials, and materials with heat-shielding properties. Two or more types of other components may be included. The form in which the other components are contained in the substrate is not particularly limited. The other components may be dispersed within the substrate, or a portion of the other components dispersed within the substrate may be exposed from the surface of the substrate, or may be adhered to the surface of the substrate.

[0032] The antibacterial and antiviral resin member of this embodiment has an electrostatic charge of 0 μC / m (hereinafter simply referred to as "electrostatic charge") when an acrylic cloth made of acrylic fibers is used as a friction cloth under conditions of a temperature of 20°C ± 2°C and a humidity of 40% ± 2%, as measured by a method conforming to Method C (frictional electrification charge measurement method) of JIS L 1094:2020 "Test methods for electrostatic charge of woven and knitted fabrics." ２ 7 μC / m or more ２ The amount of charge is less than 7 μC / m ２ If the charge amount of the antibacterial and antiviral resin member is 0 μC / m or more, the contact efficiency with the bacteria and viruses adhering to the surface becomes poor, and the bacteria and viruses cannot be inactivated efficiently. ２ 7 μC / m or more ２ However, from the viewpoint of further improving antibacterial and antiviral performance, it is preferable that the ２ 0.7 μC / m or more ２ It is preferable that it is less than 10 ...

[0033] The amount of charge on the antibacterial and antiviral resin member varies depending on the type and blending ratio of the material that makes up the base. Therefore, by adjusting the composition of the resin that makes up the base, it is possible to achieve a charge of 0 μC / m ２ 7 μC / m or more ２ On the other hand, the amount of electrostatic charge of the antibacterial and antiviral resin member can also be adjusted by applying an O / W emulsion to the surface of the substrate. The amount of electrostatic charge of the antibacterial and antiviral resin member varies depending on the composition and application amount of the O / W emulsion applied to the surface of the substrate. Therefore, by adjusting the composition and application amount of the O / W emulsion, it is possible to reduce the amount of electrostatic charge of the antibacterial and antiviral resin member to 0 μC / m or less. ２ 7 μC / m or more ２The charge amount can be less than 100%. When the charge amount is adjusted by applying an O / W emulsion to the surface of a substrate, the composition of the material constituting the substrate is less restricted than when the charge amount is adjusted by the composition of the resin constituting the substrate, making it easier to apply the antibacterial and antiviral resin member to a wider range of applications. Furthermore, when the charge amount is adjusted by applying an O / W emulsion to the surface of a substrate, the amount of solids (non-volatile components) on the surface of the substrate can be more easily adjusted by the emulsion concentration than when the charge amount is adjusted by adhering a substance other than the O / W emulsion to the surface of the substrate.

[0034] Here, emulsion refers to a system in which one of two immiscible substances (an oil-soluble substance and a water-soluble substance) is dispersed as fine droplets in the liquid phase of the other, and includes O / W emulsions (oil-in-water emulsions) in which droplets of an oil-soluble substance are dispersed in a water-soluble substance, and W / O emulsions (water-in-oil emulsions) in which droplets of a water-soluble substance are dispersed in an oil-soluble substance. In this embodiment, of these emulsions, it is preferable to use an O / W emulsion in order to adjust the amount of electrification.

[0035] An O / W emulsion contains at least an oil-soluble substance for forming droplets and a water-soluble substance for dispersing the droplets. The oil-soluble substance may be any oil-soluble substance that is liquid, pasty, or solid at room temperature, and is not particularly limited. Examples include fatty acids such as isostearic acid, isopalmitic acid, oleic acid, palmitoleic acid, linoleic acid, and ricinoleic acid; lanolin derivatives such as lanolin, lanolin alcohol, and hydrogenated lanolin alcohol; higher alcohols such as cetanol, hexyldecanol, isostearyl alcohol, stearyl alcohol, octyldodecanol, oleyl alcohol, cetostearyl alcohol, and behenyl alcohol; fatty acid esters and fatty acid oligomer esters derived from animal and vegetable oils, such as cholesterol derivatives and phytosterol derivatives; paraffin; mineral oil; and fatty acid esters (PEO). One or more of these may be used. The water-soluble substance may be any oil-soluble substance that is liquid at room temperature, and is not particularly limited. For example, water may be used. Antibacterial and antiviral resin material: 0 μC / m２ Above, 7μC / m ２ Therefore, it is preferable to use one or more selected from the group consisting of liquid paraffin, mineral oil, and fatty acid ester (PEO) as the oil-soluble substance, and it is preferable to use water as the water-soluble substance.

[0036] The fatty acid ester, which is one of the oil-soluble substances, is not limited in terms of the number of carbon atoms, and may be a saturated fatty acid ester or an unsaturated fatty acid ester. From the viewpoint of more efficiently inactivating bacteria and viruses, the fatty acid ester that can be used as the oil-soluble substance is preferably a liquid fatty acid ester having 15 to 50 carbon atoms.

[0037] The content of oil-soluble substances in the O / W emulsion is such that the charge amount of the antibacterial and antiviral resin component is 0 μC / m ２ Above, 7μC / m ２ For example, it can be set to 3% by mass or more and 15% by mass or less relative to 100% by mass of the coating liquid (100% by mass of O / W emulsion).

[0038] The O / W emulsion should contain at least an oil-soluble substance and a water-soluble substance, but preferably also contains a surfactant to stably disperse the oil droplets in water. The surfactant is not particularly limited, and either anionic surfactants or nonionic surfactants can be used.

[0039] Anionic surfactants can be used that have a carboxylic acid, sulfonic acid, or phosphoric acid structure as a hydrophilic group. Examples of carboxylic acid surfactants include fatty acid salts and cholate salts, which are the main components of soap. Examples of sulfonic acid surfactants include linear alkylbenzenesulfonate and sodium lauryl sulfate, which are commonly used in synthetic detergents. More specific examples include fatty acid soda soap, potassium oleate soap, carboxylates such as alkyl ether carboxylates, sulfates such as sodium lauryl sulfate, higher alcohol sodium sulfate, triethanolamine lauryl sulfate, sodium polyoxyethylene lauryl ether sulfate, and sodium polyoxyethylene alkyl ether sulfate, sulfonates such as sodium dodecylbenzenesulfonate, sodium alkylnaphthalenesulfonate, sodium alkyldiphenyletherdisulfonate, sodium alkanesulfonate, and sodium salts of aromatic sulfonic acid-formalin condensates, potassium alkylphosphates, sodium hexametaphosphate, and dialkylsulfosuccinates. These surfactants can be used alone or in combination.

[0040] Examples of nonionic surfactants include alkylphenol ethylene oxide adducts and higher alcohol ethylene oxide adducts, polyoxyethylene fatty acid esters, fatty acid ethylene oxide adducts and polyethylene glycol fatty acid esters, higher alkylamine ethylene oxide adducts and fatty acid amide ethylene oxide adducts, polyoxyethylene alkylamines and polyoxyethylene fatty acid amides, polypropylene glycol ethylene oxide adducts, nonionic surfactants such as fatty acid esters of glycerin and pentaerythritol, fatty acid esters of sorbitol and sorbitan, fatty acid esters of sucrose, alkyl polyglycoside fatty acids, and alkanolamides. These surfactants may be used alone or in combination.

[0041] Among the surfactants mentioned above, nonionic surfactants are preferred because they form larger micelles than anionic surfactants and can hold larger amounts of oil-soluble substances. In particular, among nonionic surfactants, one or more surfactants selected from the group consisting of polyoxyalkyl ethers, polyoxyethylene alkyl ethers, and polyoxypropylene alkyl ethers are particularly preferred.

[0042] The surfactant content in the O / W emulsion is such that the charge amount of the antibacterial and antiviral resin member is 0 μC / m ２ Above, 7μC / m ２ The amount may be appropriately adjusted so that it is less than 0.025 to 5% by mass, and is not particularly limited, but may be, for example, 0.025 to 5% by mass relative to 100% by mass of the coating liquid (100% by mass of the O / W emulsion).

[0043] By applying the O / W emulsion to the surface of a substrate, non-volatile components contained in the coating liquid adhere to the surface of the substrate, and the amount of charge of the antibacterial and antiviral resin member is adjusted by the non-volatile components. Among the components of the coating liquid described above, examples of the non-volatile components include oil-soluble substances and surfactants. The content of the non-volatile components in the O / W emulsion is determined based on the amount of charge of 0 μC / m when acrylic is used as the friction cloth for the antibacterial and antiviral resin member. ２ Above, 7μC / m ２ The amount may be appropriately adjusted so that it is less than 0.4 to 30% by mass, and is not particularly limited, but may be, for example, 0.4 to 30% by mass relative to 100% by mass of the coating liquid (100% by mass of the O / W emulsion).

[0044] In the antibacterial and antiviral resin member of this embodiment obtained by applying an O / W emulsion to a substrate, non-volatile components contained in the O / W emulsion remain attached to the surface of the substrate. Therefore, for example, in the antibacterial and antiviral resin member of this embodiment produced by applying an O / W emulsion containing a water-soluble substance and an oil-soluble substance to a substrate, the oil-soluble substance remains on the surface of the substrate as a non-volatile component of the O / W emulsion. Furthermore, in the antibacterial and antiviral resin member of this embodiment produced by applying an O / W emulsion containing a water-soluble substance, an oil-soluble substance, and a surfactant to a substrate, a mixture containing the oil-soluble substance and the surfactant remains (adheres) on the surface of the substrate as a non-volatile component of the O / W emulsion.

[0045] In the antibacterial and antiviral resin member of this embodiment, which is manufactured by applying an O / W emulsion to a substrate, the amount of non-volatile components of the O / W emulsion adhering to the substrate (the content of non-volatile components in the antibacterial and antiviral resin member) is such that the electrostatic charge is 0 μC / m ２ Above, 7μC / m ２ The content may be appropriately adjusted so that it is less than 0.1% by mass or more and 20% by mass or less, for example, relative to 100% by mass of the antibacterial and antiviral resin member. From the viewpoint of more efficiently inactivating bacteria and viruses, the amount of non-volatile components of the O / W emulsion adhered to the substrate (the content of non-volatile components in the antibacterial and antiviral resin member) is preferably 0.3% by mass or more and 12% by mass or less, relative to 100% by mass of the antibacterial and antiviral resin member. Note that, when the O / W emulsion adheres to the substrate and the non-volatile components are of two or more types, the above-mentioned amount of adhered non-volatile components refers to the total amount of adhered non-volatile components of the two or more types. When the O / W emulsion adheres to the substrate and the non-volatile components are of only one type, the amount of adhered non-volatile component refers to the amount of adhered non-volatile component of that one type.

[0046] When a surfactant and an oil-soluble substance (a mixture containing a surfactant and an oil-soluble substance) are adhered to a substrate as non-volatile components of an O / W emulsion, the blending ratio of the surfactant to the oil-soluble substance in the non-volatile components can be, for example, a mass ratio of 0.1:100 to 20:100 (surfactant:oil-soluble substance), and from the viewpoint of more efficiently inactivating bacteria and viruses, a mass ratio of 0.5:100 to 10:100 (surfactant:oil-soluble substance) is preferred.

[0047] Next, a method for producing the antibacterial and antiviral resin member of this embodiment will be described.

[0048] When the amount of charge of the antibacterial and antiviral resin member is adjusted by the type and blending ratio of the material constituting the base, the amount of charge of the antibacterial and antiviral resin member is 0 μC / m ２ Above, 7μC / m ２ The antibacterial and antiviral resin member of this embodiment can be produced by adding an antibacterial and antiviral agent to a base that has been adjusted in advance so that the viscosity is less than 100 ppm.

[0049] The method of incorporating the antibacterial / antiviral agent into the substrate can be appropriately set depending on the form in which the antibacterial / antiviral agent is incorporated, and is not particularly limited. For example, when the antibacterial / antiviral agent is dispersed inside the substrate, the amount of charge of the antibacterial / antiviral resin member is set to 0 μC / m ２ Above, 7μC / m ２ The antibacterial and antiviral resin member of this embodiment can be manufactured by adding and mixing the antibacterial and antiviral agent to a base raw material that has been adjusted in advance so that the electrostatic charge of the antibacterial and antiviral resin member is less than 0 μC / m. ２ Above, 7μC / m ２ The antibacterial and antiviral resin member of this embodiment can be produced by adhering the antibacterial and antiviral agent to a base that has been adjusted in advance so that the antibacterial and antiviral agent has a viscosity of less than 1000 ppm. The method for adhering the antibacterial and antiviral agent to the base is not particularly limited, and any conventionally known method can be used.

[0050] In addition, when the amount of charge of the antibacterial / antiviral resin member is adjusted by applying an O / W emulsion to the surface of the substrate, the amount of charge of the antibacterial / antiviral resin member is adjusted to 0 μC / m for a substrate containing an antibacterial / antiviral agent. ２ Above, 7μC / m ２ The antibacterial and antiviral resin member of this embodiment can be produced by applying and drying an O / W emulsion that has been adjusted in advance so that the viscosity becomes less than 100 ppm.

[0051] The method for applying the O / W emulsion to the substrate surface is not particularly limited, and any conventionally known method can be used, such as dipping, spraying, roll coating, bar coating, spin coating, gravure printing, offset printing, screen printing, or inkjet printing.

[0052] Next, an example of a method for producing the antibacterial and antiviral resin member of this embodiment by applying an O / W emulsion to the surface of a resin (substrate) to which copper compound particles (antibacterial and antiviral agent) have been fixed will be described in detail.

[0053] First, copper compound particles are pulverized into nano-order particles using a jet mill, hammer mill, ball mill, vibration mill, bead mill, etc. The pulverization method is not particularly limited, and both dry and wet methods can be used.

[0054] Next, the pulverized copper compound particles are dispersed in a dispersion medium such as water, methanol, ethanol, MEK (methyl ethyl ketone), acetone, xylene, or toluene. If other materials, such as reinforcing materials or functional materials, are mixed in, these materials are added. Subsequently, a dispersant such as a surfactant is added as needed, and the mixture is dispersed and crushed using a device such as a bead mill, ball mill, sand mill, roll mill, vibration mill, or homogenizer. Furthermore, a silane monomer is added to prepare a slurry in which the copper compound particles are dispersed.

[0055] The slurry prepared as described above is applied to a resin substrate by methods such as immersion, spraying, roll coating, bar coating, spin coating, gravure printing, offset printing, screen printing, or inkjet printing. At this time, the solvent (dispersion medium) is removed by heat drying or other methods, as necessary. Subsequently, functional groups on the substrate surface are chemically bonded to silane monomers by graft polymerization through reheating or graft polymerization through irradiation with infrared rays, ultraviolet rays, electron beams, gamma rays, or the like, to obtain a resin (substrate containing an antibacterial / antiviral agent) to which copper compound particles are adhered.

[0056] Furthermore, the surface of the substrate thus obtained is subjected to electrostatic charge measurement to determine whether the antibacterial and antiviral resin member has a charge of 0 μC / m ２ Above, 7μC / m ２ An O / W emulsion that has been adjusted in advance so that the viscosity is less than 1 / 2 mol / L is applied to the substrate and then dried. As described above, the application method can be a dipping method, a spray method, a roll coater method, a bar coater method, a spin coat method, a gravure printing method, an offset printing method, a screen printing method, an inkjet printing method, or the like. The drying method can be any method that removes volatile components from the O / W emulsion applied to the substrate surface, and any conventionally known method can be used. By these operations, the antibacterial and antiviral resin member of this embodiment can be obtained.

[0057] Next, an example of a method for producing the antibacterial and antiviral resin member of this embodiment by applying an O / W emulsion to the surface of a resin (substrate) having copper compound particles (antibacterial and antiviral agent) dispersed therein will be described in detail.

[0058] First, masterbatch pellets are prepared in which copper compound particles, which are antibacterial and antiviral agents, are mixed (dispersed). The masterbatch pellets are produced, for example, as follows.

[0059] Pulverized copper compound particles are mixed with a known dispersant to produce an antibacterial / antiviral agent in which the surfaces of the copper compound particles are coated with the dispersant. The antibacterial / antiviral agent is then mixed with resin pellets and dispersed within the resin pellets using a kneading extruder. Alternatively, pulverized copper compound particles and a dispersant are mixed with resin pellets and a kneading extruder is used to attract the dispersant to the copper compound fine particles during kneading, thereby producing an antibacterial / antiviral agent in which the copper compound fine particles are coated with the dispersant, and the antibacterial / antiviral agent is dispersed within the resin pellets. After cooling the kneaded mixture, the resin containing the antibacterial / antiviral agent is finely cut using a pelletizer to obtain masterbatch pellets in which the antibacterial / antiviral agent is mixed (dispersed). The proportion (concentration) of the antibacterial / antiviral agent during the production of the masterbatch pellets can be appropriately determined by those skilled in the art.

[0060] The obtained masterbatch pellets can be melt-kneaded with a resin using a molding machine and molded to obtain a resin (substrate) in which the antibacterial and antiviral agent is dispersed. For molding, methods such as injection molding and blow molding can be used.

[0061] The antibacterial / antiviral resin member of this embodiment can be manufactured in various forms (shapes, sizes, etc.) suitable for the intended use, including, in addition to molded products, forms such as sheets, films, fibers, cloths, meshes (network structures), honeycombs, and nonwoven fabrics. When manufacturing the antibacterial / antiviral resin member in the form of a sheet or film, the resin in which the antibacterial / antiviral agent is dispersed can be molded using a T-die method, an inflation method, or the like. When manufacturing the antibacterial / antiviral resin member in the form of a fiber, the resin in which the antibacterial / antiviral agent is dispersed can be molded using a melt spinning method or the like, and can also be formed into a profiled yarn, a sheath-core yarn, or the like. In particular, when manufacturing a sheath-core yarn, it is preferable to use a resin containing an antibacterial / antiviral agent in the sheath portion, because this allows the antibacterial / antiviral properties to be exhibited while reducing the amount of antibacterial / antiviral agent used. When manufacturing the antibacterial / antiviral resin member in the form of a nonwoven fabric, the resin in which the antibacterial / antiviral agent is dispersed can be molded using an existing method, such as a spunbond method.

[0062] Furthermore, when the substrate contains other components in addition to the antibacterial / antiviral agent, the other components can be contained in the substrate together with the antibacterial / antiviral agent.

[0063] The surface of the thus obtained substrate (resin in which the antibacterial and antiviral agent is dispersed) is subjected to a test so that the amount of charge of the antibacterial and antiviral resin member is 0 μC / m ２ Above, 7μC / m ２ An O / W emulsion that has been adjusted in advance so that the viscosity is less than 1 / 2 mol / L is applied to the substrate and then dried. As described above, the application method can be a dipping method, a spray method, a roll coater method, a bar coater method, a spin coat method, a gravure printing method, an offset printing method, a screen printing method, an inkjet printing method, or the like. The drying method can be any method that removes volatile components from the O / W emulsion applied to the substrate surface, and any conventionally known method can be used. By these operations, the antibacterial and antiviral resin member of this embodiment can be obtained.

[0064] The antibacterial and antiviral resin member of this embodiment obtained by the above-described production method can be used as a component for constituting not only basic fiber structures such as woven fabrics, knitted fabrics, and nonwoven fabrics, but also sheet-like products such as clothing, bedding, bedding materials, masks, handkerchiefs, towels, carpets, curtains, exterior wall materials, building materials, and interior materials; filters for air purifiers, air conditioners, ventilation fans, electric vacuum cleaners, electric fans, air conditioners, and vehicles; agricultural materials such as protective clothing, protective nets, insect screens, chicken coop nets, greenhouse films, and tunnel house films; molded articles such as air conditioner fin materials and trays for plant factories; building materials such as panels, sashes, doors, blinds, ceiling boards, floor boards, and windows; interior materials; and exterior wall materials.

[0065] According to the antibacterial and antiviral resin member of this embodiment described above, bacteria and viruses attached to the surface can be efficiently inactivated.

[0066] Next, the present invention will be described in more detail with reference to examples. However, the present invention is not limited to these examples. <Preparation of copper (I) iodide-containing fiber>

[0067] Polyethylene masterbatch pellets containing copper(I) iodide (CuI) as an antibacterial / antiviral agent and polyethylene resin were melted and mixed with polypropylene resin so that the masterbatch pellets were 10 wt %, resulting in a mixture containing 1 mass % copper(I) iodide. The resulting mixture was melted using a melt extruder installed in a melt spinning apparatus, extruded from a spinneret installed in the melt spinning apparatus, and withdrawn at a predetermined speed while cooled in a water bath to obtain copper(I) iodide-containing fibers. The fiber diameter of the resulting copper(I) iodide-containing fibers was 150 μm, and the volume average particle diameter of the copper iodide was 350 nm.

[0068] Example 1: Using the copper(I) iodide-containing fibers obtained above, a woven fabric (plain weave; 60 mesh) was woven using a rapier loom (manufactured by Dornier). During weaving, a cloth impregnated with an O / W emulsion (Merry W, manufactured by Marubishi Yuka Kogyo Co., Ltd.) containing 1.3% by mass of a nonionic surfactant (polyoxyethylene alkyl ether) and 26% by mass of mineral oil was placed on the fabric, and the O / W emulsion was applied to the fibers while the fabric was woven, yielding the antibacterial and antiviral resin composition (woven fabric) of Example 1. In the antibacterial and antiviral resin composition of Example 1, the content (adhesion amount) of nonvolatile components of the O / W emulsion was 7.1% by mass relative to 100% by mass of the antibacterial and antiviral fiber.

[0069] Example 2 Using the copper(I) iodide-containing fibers obtained above, a Russell knit (28 mesh) was produced using a Russell warp knitting machine (manufactured by Karl Mayer). During knitting, the fibers were passed through a roll impregnated with an O / W emulsion (Merry W, manufactured by Marubishi Yuka Kogyo Co., Ltd.) containing 2.0% by mass of a nonionic surfactant (polyoxyethylene alkyl ether) and 20% by mass of mineral oil, and the O / W emulsion was applied to the fibers while knitting, thereby obtaining an antibacterial and antiviral resin composition (knitted fabric) of Example 2. In the antibacterial and antiviral resin composition of Example 2, the content (adhesion amount) of nonvolatile components of the O / W emulsion was 10.0% by mass relative to 100% by mass of the antibacterial and antiviral fiber.

[0070] Example 3: The copper(I) iodide-containing fibers obtained above were used to weave a fabric (plain weave; 60 mesh) on a rapier loom (manufactured by Dornier). During weaving, a cloth impregnated with an O / W emulsion (non-volatile component concentration 10.0 wt%; Merry W, manufactured by Marubishi Yuka Kogyo Co., Ltd.) containing 0.2 wt% of a nonionic surfactant (polyoxyethylene alkyl ether) and 9.5 wt% of mineral oil was placed on the fabric, and the O / W emulsion was applied to the fibers while the fabric was woven, yielding the antibacterial and antiviral resin composition (woven fabric) of Example 3. In the antibacterial and antiviral resin composition of Example 3, the content (adhesion amount) of the non-volatile components of the O / W emulsion was 1.4 wt% based on 100 wt% of the antibacterial and antiviral fibers.

[0071] Example 4: The copper(I) iodide-containing fibers obtained above were used to weave a fabric (plain weave; 60 mesh) on a rapier loom (manufactured by Dornier). During weaving, a cloth impregnated with an O / W emulsion (non-volatile component concentration 5 wt%; Merry W, Marubishi Yuka Kogyo Co., Ltd.) containing 0.04 wt% of a nonionic surfactant (polyoxyethylene alkyl ether) and 4.9 wt% of mineral oil was placed on top, and the O / W emulsion was applied to the fibers while weaving, yielding the antibacterial and antiviral resin composition (woven fabric) of Example 4. In the antibacterial and antiviral resin composition of Example 4, the content (adhesion amount) of the non-volatile components of the O / W emulsion was 0.4 wt% relative to 100 wt% of the antibacterial and antiviral fibers.

[0072] Comparative Example 1 The antibacterial and antiviral resin composition (woven fabric) of Comparative Example 1 was obtained in the same manner as in Example 1, except that the fabric was woven without placing a cloth impregnated with an O / W emulsion (Merry W, manufactured by Marubishi Yuka Kogyo Co., Ltd.) on the fabric (i.e., the same manner as in Example 1, except that the O / W emulsion was not applied to the copper (I) iodide-containing fiber).

[0073] Comparative Example 2 An antibacterial and antiviral resin composition (knitted fabric) of Comparative Example 2 was obtained in the same manner as in Example 2, except that the fiber was not passed through a roll impregnated with an O / W emulsion (Merry W, manufactured by Marubishi Yuka Kogyo Co., Ltd.) (i.e., the same manner as in Example 2, except that the O / W emulsion was not applied to the copper (I) iodide-containing fiber).

[0074] (Comparative Example 3) Fibers were spun using polyethylene masterbatch pellets that did not contain copper (I) iodide (CuI) as an antibacterial and antiviral agent, and then woven in the same manner as in Example 1 to obtain a resin composition (woven fabric) of Comparative Example 3. In the resin composition of Comparative Example 3, the content of nonvolatile components remaining on the surface of the woven fabric was 7.1% by mass relative to 100% by mass of the fiber.

[0075] <Measurement of Electrostatic Charge Amount> Measurement of the electrostatic charge amount for each sample of Examples 1 to 4 and Comparative Examples 1 to 3 was carried out in accordance with Method C (frictional electrostatic charge amount measurement method) of JIS L 1094 "Test methods for electrostatic charge properties of woven and knitted fabrics," and the electrostatic charge amount was measured using an acrylic cloth made of acrylic fibers as the friction cloth under conditions of a temperature of 20±2°C and a humidity of 40%±2%. The results are shown in Table 1.

[0076] <Measurement of Antiviral Activity> The antiviral activity of each sample in Examples 1 to 4 and Comparative Examples 1 to 3 was measured using influenza virus in accordance with JIS L 1922 "Plaque Measurement Method." The results are shown in Table 1. The standard cloth used as a control was a test attachment white cotton cloth (Kanakin No. 3) conforming to JIS L 0803. The times (2 hours and 24 hours) shown in Table 1 below are the time elapsed from the start of contact between the antibacterial and antiviral resin composition and the virus.

[0077]

[0078] From the above results, it was confirmed that Examples 1 to 4, in which the O / W emulsion was applied to the surface, had a small amount of electrostatic charge and were able to come into efficient contact with viruses, demonstrating high antiviral properties that reached below the detection limit in a short period of two hours, whereas Comparative Examples 1 and 2, which had a high amount of electrostatic charge, took as long as 24 hours for the electrostatic charge to reach below the detection limit, despite containing an antibacterial / antiviral agent. Furthermore, Comparative Example 3, which did not contain an antibacterial / antiviral agent, showed no antiviral effect. From the above results, it was confirmed that viruses can be efficiently inactivated by using the antibacterial / antiviral resin composition of this embodiment.

[0079] <Measurement of antibacterial activity> The antibacterial activity of each fiber in Examples 1 to 4 and Comparative Examples 1 to 3 was measured using Staphylococcus aureus in accordance with JIS L 1902. The results are shown in Table 2. The standard cloth used as a control was a test cloth (Kanakin No. 3) made of cotton, conforming to JIS L 0803. The times (2 hours and 24 hours) shown in Table 2 below are the time elapsed since the start of contact between the antibacterial and antiviral resin composition and bacteria.

[0080]

[0081] From the above results, it was confirmed that Examples 1 to 4, in which the O / W emulsion was applied to the surface, had a small amount of electrostatic charge and were able to come into efficient contact with Staphylococcus aureus, and exhibited high antibacterial properties that were below the detection limit in a short period of two hours, whereas Comparative Examples 1 and 2, which had a high amount of electrostatic charge, took as long as 24 hours for the electrostatic charge to fall below the detection limit, despite containing an antibacterial / antiviral agent. Furthermore, Comparative Example 3, which did not contain an antibacterial / antiviral agent, showed no antibacterial effect. From the above results, it was confirmed that the antibacterial / antiviral resin composition of this embodiment can be used to efficiently inactivate both viruses and bacteria.

Claims

DEPCT681. The main antibacterial / antiviral resin component consists of: a resin-formed substrate; and the antibacterial / antiviral agent contained in the substrate, with the main antibacterial / antiviral resin component having a charge content of 0 microcoulombs per square meter or more and less than 7 microcoulombs per square meter.

2. The main antibacterial / antiviral resin component according to claim 1, here an O / W emulsion is applied to the substrate surface.

3. The main antibacterial / antiviral resin component according to claim 1, here an oil-soluble agent is adhered to the substrate surface.

4. The main antibacterial / antiviral resin component according to claim 3, here one or more oil-soluble agents are selected from a group consisting of liquid paraffin, solvent oils, and fatty acid esters.

5. The main antibacterial / antiviral resin component according to claim 3 or 4, here a surfactant is adhered to the substrate surface.6.The main component of the antibacterial / antiviral resin under claim 5, herein the surfactant is a nonionic surfactant.

7. The main component of the antibacterial / antiviral resin under claim 6, herein the nonionic surfactant is one or more selected from a group consisting of polyoxyalkyl ethers, polyoxyethylenealkyl ethers, and polyoxypropylenealkyl ethers.