Sheet for cleaning

Abstract

To provide a sheet for cleaning which is impregnated with an aqueous disinfecting agent excellent in corrosion prevention property of an object to be cleaned such as metal and a resin.SOLUTION: A sheet for cleaning includes a base material sheet impregnated with an aqueous disinfecting agent, wherein the aqueous disinfecting agent contains 0.01 mass% or more and less than 0.5 mass% of a quaternary ammonium salt as a component (A), 0.0001 mass% or more and less than 0.1 mass% of an isothiazoline-based compound as a component (B), and water as a component (C), contains an alkyl dimethylbenzylammnium salt (component (A-1)) and a dialkyl dimethylammonium salt (component (A-2)), as the component (A), and a pH of a squeeze-out liquid of the base material sheet is 4.0 or more and 9.5 or less.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to a cleaning sheet that not only has disinfecting properties against bacteria and mold and an inactivating effect on viruses, but also has excellent effects of preventing corrosion, cracking, and discoloration of an object to be wiped. [Background technology]

[0002] The so-called wet sheets (cleaning sheets) in which a nonwoven fabric is impregnated with an aqueous solution containing a disinfectant are simple, easy to use, and disposable, so that clean sheets can always be used, and therefore they are widely used not only for home use but also for environmental maintenance in food factories, kitchens, medical facilities, etc. In particular, medical facilities require high disinfecting and cleanability, and medical equipment and devices are frequently cleaned using cleaning sheets.

[0003] As an example of a conventional wet sheet, Patent Document 1 discloses an anti-virus sheet in which an aqueous liquid agent is supported on a fiber assembly, and the fiber composition of the fiber assembly and / or the composition of the aqueous liquid agent are adjusted so that the released liquid from the sheet derived from the aqueous liquid agent onto the surface to be wiped contains alkylbenzyldimethylammonium chloride and a water-soluble solvent (hereinafter, Prior Art 1). It has excellent virus inactivation effect and disinfecting properties.

[0004] Patent Document 2 discloses a disinfecting sheet (hereinafter, Prior Art 2) impregnated with an aqueous disinfectant containing a quaternary ammonium salt surfactant, an inorganic electrolyte and / or a citrate salt, and an alkaline agent, and having a pH of 8.1 or more and 12.0 or less. Prior Art 2 has good disinfecting properties against bacteria and mold, and also has virus removing properties against viruses that exhibit strong resistance, and is excellent in disinfecting and virus removing effects.

[0005] Patent Document 3 discloses a cleaning sheet (hereinafter, Prior Art 3) that contains a quaternary ammonium salt surfactant as component (A) and an isothiazolinone compound as component (B), the mass ratio of component (A) to component (B) being 1.0 or more and 100 or less in terms of the (A) / (B) value, the total of components (A) and (B) in the aqueous disinfectant being 0.1% by mass or more, and the pH of the aqueous disinfectant impregnated in the base sheet being 4.0 or more and 9.0 or less. Prior Art 3 has good disinfecting properties against bacteria and mold, is also considered in terms of virus inactivation effect, and is excellent in corrosion prevention properties for items to be wiped. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] JP 2022-033630 A [Patent Document 2] JP 2018-027916 A [Patent Document 3] Patent No. 6961777 Summary of the Invention [Problem to be solved by the invention]

[0007] However, all conventional cleaning sheets have had problems. The virus-removing sheet of conventional technology 1 is suggested to have excellent virus-removing and germ-removing properties against enveloped viruses, but is less effective at inactivating non-enveloped viruses, which are considered to have stronger physical and chemical resistance than enveloped viruses. Meanwhile, the germ-removing sheet of conventional technology 2 has an alkaline pH range, so although it has an excellent virus-inactivating effect against enveloped and non-enveloped viruses, it does not provide sufficient corrosion protection for the object being wiped.

[0008] Conventional technology 3 has good disinfecting properties against bacteria and mold, and also takes into consideration the virus inactivation effects against enveloped and non-enveloped viruses. In addition, since the pH is in the neutral range, it has excellent corrosion prevention properties for the objects to be wiped. However, there is a risk that the resins used in medical devices, etc. may be affected by discoloration and cracking.

[0009] The present invention has been made in consideration of the above problems. That is, an object of the present invention is to provide a cleaning sheet impregnated with an aqueous disinfectant that is excellent in disinfecting properties, mold removing properties, and virus inactivating effects including non-enveloped viruses, as well as in preventing corrosion of objects to be wiped, such as metals and resins. [Means for solving the problem]

[0010] In order to solve the above problems, the inventors conducted extensive research and found that the problems can be solved by impregnating a base sheet with an aqueous disinfectant containing a quaternary ammonium salt as component (A) and an isothiazolinone compound as component (B) in specific ranges, and selecting an aqueous disinfectant such that the pH of the squeezed liquid squeezed out after impregnation into the base sheet is 4.0 or more and 9.5 or less, thereby completing the present invention.

[0011] That is, the present invention relates to a cleaning sheet comprising a base sheet impregnated with an aqueous disinfectant, the aqueous disinfectant comprising, as component (A), 0.01% by mass or more and less than 0.5% by mass of a quaternary ammonium salt, as component (B), 0.0001% by mass or more and less than 0.1% by mass of an isothiazolinone-based compound, as component (C), and water, in which component (A) includes an alkyldimethylbenzylammonium salt (component (A-1)) and a dialkyldimethylammonium salt (component (A-2)), and the pH of the squeezed liquid squeezed out after impregnating the base sheet with the aqueous disinfectant is 4.0 or more and 9.5 or less. Effect of the Invention

[0012] The cleaning sheet of the present invention not only exhibits excellent disinfecting properties and virus inactivation effects, but also has excellent corrosion prevention properties for the objects being wiped, especially for resins with low resistance to chemicals, such as polyvinyl chloride, ABS, PET, PBT, polypropylene, polyethylene, acrylic, polycarbonate, silicone, and Teflon (registered trademark). DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] The cleaning sheet of the present invention is a cleaning sheet comprising a base sheet impregnated with an aqueous disinfectant. The aqueous disinfectant contains 0.01% by mass or more and less than 0.5% by mass of a quaternary ammonium salt as component (A), 0.0001% by mass or more and less than 0.1% by mass of an isothiazolinone compound as component (B), and water as component (C), and is prepared so that component (A) contains an alkyldimethylbenzylammonium salt (component (A-1)) and a dialkyldimethylammonium salt (component (A-2)).

[0014] The cleaning sheet of the present invention has excellent disinfecting and virus inactivating effects, and also has excellent corrosion prevention properties for objects to be wiped, particularly vinyl chloride, ABS, PET, PBT, polypropylene, polyethylene, acrylic, polycarbonate, silicone, and Teflon. Therefore, the cleaning sheet of the present invention is effective not only for household use, but also for environmental maintenance in food factories, kitchens, and medical facilities, as well as for removing bacteria and taking measures against viruses, and even if the surface to be cleaned is metal such as brass, soft iron, aluminum, zinc nickel, aluminum, copper, stainless steel, or resin such as vinyl chloride, ABS, PET, PBT, polypropylene, polyethylene, acrylic, polycarbonate, silicone, and Teflon, corrosion of the surface to be cleaned is effectively prevented, particularly for vinyl chloride, PET, PBT, and polycarbonate.

[0015] The cleaning sheet of the present invention will be described in detail below. In addition, some terms related to the effects of the present invention have the following meanings. The term "bactericidal property" and "mold removing property" refer to the ability to remove bacteria on the surface of an object to be cleaned when the cleaning sheet is used to clean the object, and the term "virus inactivation effect" refers to the ability to remove or inactivate viruses on the surface of the object to be cleaned. Furthermore, the term "cleaning property" refers to the ability to remove dirt when the cleaning sheet is used.

[0016] (Base sheet) The cleaning sheet of the present invention includes a base sheet. The cleaning sheet of the present invention may be a single-layer sheet substantially consisting of only the base sheet, or may be a laminated sheet of two or more layers consisting of the base sheet and any sheet laminated thereto. In addition, the cleaning sheet may be laminated with base sheets made of different materials.

[0017] The base sheet may be any sheet capable of adequately retaining the aqueous disinfectant impregnated therein.Specific examples of the base sheet include nonwoven fabrics, woven fabrics, mesh fabrics, and the like made of recycled fibers, synthetic fibers, natural fibers, or mixtures thereof.

[0018] From the viewpoint of the base sheet becoming hydrophilic and thus enabling an increased amount of the aqueous disinfectant to be impregnated, and of uneven distribution of the agent, it is preferable that the base sheet is a sheet containing recycled fibers, and the proportion of recycled fibers in the 100% by mass of the fibers constituting the base sheet is preferably 10% by mass or more, and more preferably 50% by mass or more.

[0019] The amount of the aqueous disinfectant impregnated into the base sheet is usually about 20 to 120 parts by mass per 100 parts by mass of the fibers constituting the base sheet, but a base sheet comprising recycled fibers can increase the amount of the aqueous disinfectant impregnated into the base sheet. For example, a base sheet comprising 50% or more recycled fibers in a base sheet made up of 100% by mass of fibers constituting the base sheet can have an amount of the aqueous disinfectant impregnated in the range of 150 to 350 parts by mass per 100 parts by mass of the fibers constituting the base sheet. Furthermore, a base sheet containing recycled fibers is also preferable from the viewpoints of improving the feeling of use and preventing abrasion to the surface to be wiped.

[0020] Here, the regenerated fiber refers to a fiber made by dissolving a natural polymer compound into a solution and then spinning the solution through a spinneret. Examples of the natural polymer compound include cellulose-based materials using cellulose materials such as wood and cotton, and protein-based materials using protein materials such as milk, corn, and peanuts. Examples of regenerated fibers produced using cellulosic materials include rayon, polynosic, cupra, lyocell, etc. From the viewpoint of uneven distribution of chemicals and excellent chemical resistance, it is preferable that rayon is contained, and it is more preferable that rayon is contained in an amount of more than 50 mass% based on 100 mass% of the fibers constituting the base sheet.

[0021] The other fibers that are combined with the regenerated fibers to form the base sheet are not particularly limited, but examples include synthetic fibers such as polypropylene, polyester, polystyrene, and acrylic, and natural fibers such as cotton and wool.

[0022] (Water-based disinfectant) Next, the aqueous disinfectant of the present invention will be described. The aqueous disinfectant contains the (A), (B) and (C) components, and is adjusted so that the (A) and (B) components are blended in a specific range. In the present invention, the pH of the squeezed liquid obtained from the base sheet impregnated with the aqueous disinfectant is 4.0 or more and 9.5 or less. As described above, the pH is in the neutral range, and the composition is excellent not only in terms of disinfection and mold removal properties but also in terms of virus inactivation effects, and is excellent in terms of corrosion prevention of the wiped surface of various materials such as metals and resins. The present invention was first achieved by combining the quaternary ammonium salt (component (A-1)) and the dialkyldimethylammonium salt (component (A-2)) as the (A) component, and the isothiazolinone compound (component (B)) as one of the main components in the cleaning sheet, and blending them in an appropriate concentration range.

[0023] The lower limit of the pH of the aqueous disinfectant impregnated in the base sheet is preferably pH 4.5 or more, more preferably pH 5.0 or more, and even more preferably pH 6.0 or more, from the viewpoint of improving the cleaning property, disinfecting property, mold removal property, and virus inactivation effect. On the other hand, the upper limit of the pH is preferably pH 9.0 or less, and even more preferably pH 8.5 or less, from the viewpoint of improving the corrosiveness to the object to be wiped. For the method of measuring the pH, see the description in the examples below.

[0024] (A) Component: Examples of the quaternary ammonium salt surfactant, which is the component (A) contained in the aqueous disinfectant, include alkyl dimethyl benzyl ammonium salt, dialkyl dimethyl ammonium salt, alkyl trimethyl ammonium salt, alkyl dimethyl ethyl ammonium salt, dialkyl ethyl methyl ammonium salt, dialkyl monomethyl hydroxyethyl ammonium salt, alkyl dimethyl hydroxyethyl ammonium salt, alkyl dipolyoxyethylene methyl ammonium salt, alkyl pyridinium salt, and benzethonium salt. Here, the alkyl group includes an alkyl group having 4 to 22 carbon atoms, preferably a straight-chain alkyl group having 6 to 18 carbon atoms. Specific examples include butyl, hexyl, octyl, decyl, dodecyl, tetradecyl, hexadecyl, heptadecyl, octadecyl, eicosyl, and docosyl, and more preferably octyl and decyl. Suitable salts include chloride ions, bromide ions, iodide ions, alkyl sulfate ester ions having 1 or 2 carbon atoms, fatty acid ions having 1 to 12 carbon atoms, and benzenesulfonate ions which may be substituted with 1 to 3 alkyl groups having 1 to 3 carbon atoms. The component (A) can be used alone or in combination of two or more types.More specific examples of the component (A) described above include, for example, octyldecyl dimethyl ammonium chloride, dioctyl dimethyl ammonium chloride, didecyl dimethyl ammonium chloride, dialkyl dimethyl ammonium chloride, hexadecyl trimethyl ammonium chloride, didecyl monomethyl hydroxyethyl ammonium chloride, didecyl monomethyl hydroxyethyl ammonium adipate, didecyl monomethyl hydroxyethyl ammonium gluconate, didecyl monomethyl hydroxyethyl ammonium sulfonate, 1,4-bis(3,3 Examples of the alkyl group include 1,2'-(1-decylpyridinium)methyloxy)butane dibromide, N,N'-hexamethylene bis(4-carbamoyl-1-decylpyridinium bromide), alkyl dimethyl hydroxyethyl ammonium chloride, alkyl trimethyl ammonium chloride, alkyl dimethyl ethyl ammonium ethyl sulfate, dialkyl dimethyl ammonium methosulfate, octyl decyl dimethyl ammonium methosulfate, cetyl pyridinium chloride, decyl isononyl dimethyl ammonium chloride, didecyl methyl polyoxyethylene ammonium propionate, benzethonium chloride, and alkyl pyridinium chloride. In the present invention, the component (A) may be a single compound having an alkyl group with a carbon number of 4 to 22, or a combination of two or more compounds having an alkyl group with a carbon number of 4 to 22.

[0025] (A-1) Component: The aqueous disinfectant contains an alkyl dimethyl benzyl ammonium salt (component (A-1)) as component (A). The alkyl group of the alkyl dimethyl benzyl ammonium salt is not particularly limited, but is usually an alkyl group having 4 to 22 carbon atoms, preferably a linear alkyl group having 6 to 18 carbon atoms, more preferably a linear alkyl group having 10 to 18 carbon atoms, and even more preferably a linear alkyl group having 12 to 16 carbon atoms. Specific examples include butyl, hexyl, octyl, decyl, dodecyl, tetradecyl, hexadecyl, heptadecyl, octadecyl, eicosyl, and docosyl, and more preferably octyl, decyl, dodecyl, tetradecyl, hexadecyl, and octadecyl. Examples of the salt include a chloride ion, a bromide ion, an iodide ion, an alkyl sulfate ester ion having 1 or 2 carbon atoms, a fatty acid ion having 1 to 12 carbon atoms, and a benzenesulfonate ion which may be substituted with one or more and three or less alkyl groups having 1 to 3 carbon atoms, and the chloride ion is preferred.

[0026] (A-2) Component: The aqueous disinfectant contains a dialkyldimethylammonium salt (component (A-2)) as component (A). Here, the alkyl group is not particularly limited, but is usually an alkyl group having 4 to 22 carbon atoms, preferably a linear alkyl group having 6 to 18 carbon atoms, more preferably a linear alkyl group having 6 to 14 carbon atoms, even more preferably a linear alkyl group having 8 to 12 carbon atoms, and most preferably a linear alkyl group having 8 to 10 carbon atoms. Specific examples include butyl, hexyl, octyl, decyl, dodecyl, tetradecyl, hexadecyl, heptadecyl, octadecyl, eicosyl, and docosyl, and more preferably octyl and decyl. Examples of salts include chloride ions, bromide ions, iodide ions, alkyl sulfate ester ions having 1 or 2 carbon atoms, fatty acid ions having 1 to 12 carbon atoms, and benzenesulfonate ions having 1 to 3 alkyl groups having 1 to 3 carbon atoms, and chloride ions are preferred.

[0027] The aqueous disinfectant impregnated in the base sheet contains component (A) at 0.01% by mass or more and less than 0.5% by mass, preferably at 0.04% by mass or more and 0.48% by mass or less, and more preferably at 0.1% by mass or more and 0.46% by mass or less. If the content of component (A) in the aqueous disinfectant is less than 0.01% by mass, the disinfecting property, mold removing property, or virus inactivation effect may decrease, and if it is 0.5% by mass or more, the corrosiveness of the resin to the object to be wiped may be affected.

[0028] The component (A) includes the components (A-1) and (A-2). The total amount of the components (A-1) and (A-2) is preferably 0.01% by mass or more and less than 0.5% by mass, more preferably 0.04% by mass or more and 0.48% by mass or less, and even more preferably 0.1% by mass or more and 0.46% by mass or less, based on the total amount of the aqueous disinfectant impregnated in the base sheet.

[0029] The combined amount of component (A-1) and component (A-2) is preferably at least 20 mass%, more preferably at least 50 mass%, even more preferably at least 60 mass%, even more preferably at least 80 mass%, and still more preferably at least 90 mass%, and it is most preferable that component (A) consists of component (A-1) and component (A-2).

[0030] The isothiazolinone compound, which is component (B) contained in the aqueous disinfectant, is a compound having an isothiazolinone skeleton represented by the following general formula.

[0031] [ka]

[0032] Specific examples of the (B) component include 5-chloro-2-methyl-4-isothiazolin-3-one, 5-chloro-2-n-octyl-4-isothiazolin-3-one, 4-chloro-2-n-octyl-4-isothiazolin-3-one, 4,5-dichloro-2-n-octyl-4-isothiazolin-3-one, 4,5-dichloro-2-cyclohexyl-4-isothiazolin-3-one, 2-methyl-4-isothiazolin-3-one, 2-ethyl-4-isothiazolin-3-one, 2-n-octyl-4-isothiazolin-3-one, isothiazolin-3-one, 1,2-benzisothiazolin-3-one, and Nn-butyl-benzisothiazolin-3-one. Among these, from the viewpoint that a better virus inactivation effect can be exhibited while maintaining a neutral pH range by using it in combination with component (A), it is preferable that component (B) contains one or more selected from 5-chloro-2-methyl-4-isothiazolin-3-one, 2-methyl-4-isothiazolin-3-one, and 1,2-benzisothiazolin-3-one, and it is more preferable that component (B) contains 1,2-benzisothiazolin-3-one.

[0033] The aqueous disinfectant impregnated in the base sheet usually contains component (B) at 0.0001% by mass or more and less than 0.1% by mass, preferably at 0.0005% by mass or more and less than 0.08% by mass, and more preferably at 0.0005% by mass or more and less than 0.05% by mass. If the content of component (B) is less than 0.0001% by mass, the virus inactivation effect may not be fully exerted, and if it is 0.1% by mass or more, the corrosiveness of the resin to the object to be wiped may be affected.

[0034] (C) Component: The water of the (C) component in the aqueous disinfectant is not particularly limited, and examples thereof include tap water, well water, ion-exchanged water, and soft water. The (C) component can be used alone or in combination of two or more. Among them, tap water, ion-exchanged water, and soft water are preferred from the viewpoint of providing good disinfecting properties, virus-removing properties, and usability. The aqueous disinfectant impregnated in the base sheet contains water of the (C) component as a solvent, and is the remainder of the (A) component, the (B) component, and other optional components, which are cleaning components. The content of water is preferably in the range of 70% by mass or more and less than 99.99% by mass based on the total amount of the aqueous disinfectant.

[0035] The aqueous disinfectant may further contain at least one selected from inorganic electrolytes and organic acids or their salts as component (D). By including component (D), the disinfecting property, mold removing property, and virus inactivation effect can be further improved. This is believed to be because the incorporation of component (D) inhibits component (A) from being adsorbed to the fibers constituting the base sheet, and facilitates transfer of component (A) to the surface to be wiped.

[0036] Examples of inorganic electrolytes that can be used as component (D) include carbonic acid, sodium carbonate, potassium carbonate, sodium bicarbonate, potassium bicarbonate, sodium sesquicarbonate, potassium sesquicarbonate, sodium percarbonate, potassium percarbonate, sodium sulfate, potassium sulfate, sodium chloride, potassium chloride, boric acid, sodium borate, potassium borate, phosphoric acid, sodium phosphate, potassium phosphate, sodium dihydrogen phosphate, potassium dihydrogen phosphate, disodium hydrogen phosphate, dipotassium hydrogen phosphate, and the like.

[0037] Examples of organic acids or organic acid salts that can be used as component (D) include formic acid or its salts, acetic acid or its salts, citric acid or its salts, malic acid or its salts, lactic acid or its salts, oxalic acid or its salts, propionic acid or its salts, tartaric acid or its salts, fumaric acid or its salts, maleic acid or its salts, gluconic acid or its salts, adipic acid or its salts, itaconic acid or its salts, etc. Component (D) can be used alone or in combination of two or more kinds. Among these, acetic acid or a salt thereof, citric acid or a salt thereof, malic acid or a salt thereof, lactic acid or a salt thereof, oxalic acid or a salt thereof, propionic acid or a salt thereof, tartaric acid or a salt thereof, fumaric acid or a salt thereof, maleic acid or a salt thereof, gluconic acid or a salt thereof, adipic acid or a salt thereof, itaconic acid or a salt thereof, phosphoric acid or a salt thereof, sodium dihydrogen phosphate, potassium dihydrogen phosphate, disodium hydrogen phosphate, dipotassium hydrogen phosphate, and sodium chloride are preferably used because they tend to significantly improve the disinfecting properties, fungicidal properties, and virus inactivation effects, and a combination of acetic acid and a salt thereof, a combination of citric acid and a salt thereof, a combination of malic acid and a salt thereof, a combination of gluconic acid and a salt thereof, and a combination of at least one of sodium dihydrogen phosphate or potassium dihydrogen phosphate and at least one of disodium hydrogen phosphate or dipotassium hydrogen phosphate are more preferred. In particular, the use of a combination of at least one of sodium dihydrogen phosphate or potassium dihydrogen phosphate and at least one of disodium hydrogen phosphate or dipotassium hydrogen phosphate is preferred because it is more likely to significantly improve the disinfecting properties, fungicidal properties, virus inactivation effects, and the like.

[0038] The aqueous disinfectant preferably contains 0.01% to 5% by mass of component (D), more preferably 0.05% to 3% by mass, and even more preferably 0.1% to 1.5% by mass. If the content of component (D) is less than 0.01% by mass, the improved effects of disinfection, fungicidal properties, virus inactivation, etc. may not be significantly exhibited, and even if it is blended in an amount exceeding 5% by mass, further improvement in the effects is unlikely to be confirmed.

[0039] The aqueous disinfectant may further contain at least one surfactant selected from an anionic surfactant, a nonionic surfactant, and an amphoteric surfactant as component (E). By containing such a surfactant, the cleaning properties of the cleaning sheet of the present invention can be improved.

[0040] The aqueous disinfectant impregnated in the base sheet preferably contains 0.005% to 5% by mass of component (E), more preferably 0.01% to 2% by mass, and even more preferably 0.03% to 1% by mass. If the content of component (E) is less than 0.005% by mass, the cleaning effect is not significantly exhibited, and if it exceeds 5% by mass, the feeling of use and storage stability of the cleaning sheet may decrease.

[0041] Examples of anionic surfactants that can be used as component (E) include fatty acids, alkenyl succinic acids, polyoxyalkylene alkyl or alkenyl ether carboxylic acids, alkylol sarcosines, alkyl or alkenyl sulfates, polyoxyalkylene alkyl or alkenyl ether sulfates, amide ether sulfates, alkylbenzene sulfonic acids, olefin sulfonic acids, alkanesulfonic acids, alkyl diphenyl ether disulfonic acids, dialkyl sulfosuccinic acids, polyoxyalkylene alkyl ether sulfosuccinic acids, acyltauric acids, alkyl monophosphates, alkyl triphosphates, polyoxyalkylene alkyl ether phosphates, dipolyoxyalkylene alkyl ether phosphates, tripolyoxyalkylene alkyl ether phosphates, tripolyoxyalkylene alkyl ether phosphates, and alkali metal and ammonium salts thereof.

[0042] Examples of nonionic surfactants that can be used as component (E) include polyoxyalkylene alkyl ethers, polyoxyalkylene alkyl phenyl ethers, polyoxyalkylene styrenated phenyl ethers, polyalkylene glycol monoalkyl fatty acid esters, polyalkylene glycol dialkyl fatty acid esters, polyoxyalkylene glycerin monoalkyl fatty acid esters, polyoxyalkylene sorbitan monoalkyl fatty acid esters, polyoxyethylene sorbitan trialkyl fatty acid esters, block polymers of polyoxyethylene and polyoxypropylene, lamellar polymers of polyoxyethylene and polyoxypropylene, and the like. Examples of the polyoxyethylene and polyoxypropylene copolymers include random polymers, random polymers of polyoxyethylene and polyoxypropylene (reverse type), block-type ethylenediamine of polyoxyethylene and polyoxypropylene, block-type ethylenediamine of polyoxyethylene and polyoxypropylene (reverse type), sorbitan esters, glycerides (glycerin (mono- or di-) fatty acid esters), alkyl fatty acid (mono- or poly) esters of polyglycerin, polyglycerin condensed ricinoleic acid esters, organic acid monoglycerides, propylene glycol fatty acid esters, sucrose fatty acid esters, alkyl glyceryl ethers, and alkyl polyglucosides.

[0043] Examples of amphoteric surfactants that can be used as component (E) include alkylaminoacetic acid betaine, alkylamidopropyl betaine, sulfobetaine, alkylamino (mono- or di-)propionate, imidazolinium betaine, alkylamine oxide, alkylaminoethyl glycine, alkyldi(aminoethyl)glycine, glycine n-(3-aminopropyl) C10-16 derivative, alkylpolyaminoethylglycine, N-alkyl-β-alanine, alkyldiethanolamine, polyoxyalkylenealkylamine, and oxyethylene addition type surfactants of diamine. The above-mentioned component (E) may be used alone or in combination of two or more kinds. As these amphoteric surfactants, alkylamine oxides are preferred, and alkyldimethylamine oxides are more preferred. The alkyl group of the alkylamine oxide preferably has 6 to 14 carbon atoms, and more preferably has 8 to 12 carbon atoms.

[0044] The aqueous disinfectant may further contain a chelating agent as component (F). By containing such a chelating agent, the storage stability of the aqueous disinfectant of the cleaning sheet of the present invention can be improved.

[0045] The aqueous disinfectant impregnated in the base sheet preferably contains 0.001% to 5% by mass of component (F), more preferably 0.01% to 3% by mass, and even more preferably 0.03% to 1.5% by mass. If the content of component (F) is less than 0.001% by mass, good cleaning properties and storage stability are unlikely to be significantly exhibited, and if it exceeds 5% by mass, storage stability due to component (F) cannot be expected.

[0046] Examples of the chelating agent include, for example, nitrilotriacetic acid or its salt, ethylenediaminetetraacetic acid or its salt, hydroxyethylenediaminetriacetic acid or its salt, diethylenetriaminopentaacetic acid or its salt, triethylenetetraaminehexaacetic acid or its salt, hydroxyethyliminodiacetic acid or its salt, dihydroxyethylglycine or its salt, methylglycinediacetic acid or its salt, glutamic acid diacetic acid or its salt, aspartic acid diacetic acid or its salt, β-alaninediacetic acid or its salt, tripolyphosphoric acid or its salt, etc. Among them, as the chelating agent, ethylenediaminetetraacetic acid or its salt, nitrilotriacetic acid or its salt, methylglycinediacetic acid or its salt, hydroxyethylenediaminetriacetic acid or its salt, glutamic acid diacetic acid or its salt are preferred. Examples of the salt of the above-mentioned (E) component include sodium salt and potassium salt, and the specific composition of the above-mentioned (E) component may be used alone or in combination of two or more.

[0047] The aqueous disinfectant used in the cleaning sheet of the present invention may contain other components that are commonly used in the art, as necessary, to the extent that the effect of the present invention is not impaired. Such components include, for example, organic solvents, fragrances, colorants, etc.

[0048] Examples of the organic solvent include methanol, ethanol, 1-propanol, 2-propanol, acetone, ethylene glycol, polyethylene glycol, propylene glycol, butylene glycol, pentylene glycol, hexylene glycol, glycerin, sorbitol, etc. These may be used alone or in combination of two or more.

[0049] Examples of the fragrance include natural fragrances extracted from natural products such as peppermint oil, synthetic fragrances such as limonene, and fragrances obtained by mixing two or more known fragrances in an appropriate ratio. For example, natural fragrances include anise oil, basil oil, bergamot oil, cedar oil, clove oil, coriander oil, eucalyptus oil, fennel oil, galbanum oil, geranium oil, jasmine absolute, lavandin oil, lavender oil, lemongrass oil, lemon oil, lavender spike oil, neroli oil, oakmoss absolute, patchouli oil, petitgrain oil, pine oil, rose oil, rosemary oil, clary sage oil, sandalwood oil, Examples of oils that may be used include thyme oil, tonka absolute, tuberose absolute, vetiver oil, ylang-ylang oil, peppermint oil, camphor oil, aromatic oil, perilla oil, spearmint oil, star anise oil, lime oil, ocotia oil, turpentine oil, nutmeg oil, citronella oil, bois rose oil, cananga oil, cardamom oil, cassia oil, orange oil, mandarin oil, tangerine oil, bay oil, elemi oil, hiba oil, cypress oil, grapefruit oil, and yuzu oil.

[0050] Examples of synthetic fragrances include hydrocarbons, alcohols, aldehydes, ketones, lactones or oxides, ethers, esters, etc. Examples of hydrocarbons include α-pinene, limonene, camphene, p-cymene, fenchene, ocimene, and guaiene, etc. Examples of alcohols include linalool, geraniol, citronellol, nerol, menthol, borneol, benzyl alcohol, anise alcohol, nerolidol, eugenol, α-phenylethyl alcohol, β-phenylethyl alcohol, rhodinol, ambrinol, myrcenol, tetrahydrolinalool, terpineol, cedrol, 1-octanol, 3-octanol, 9-decenol, 10-undecenol, dihydrocarveol, prenol, ethyl linalool, 3-heptanol, benzenol, benzoyl alcohol ... Examples of such ethanol include dieugenol, 2-ethylhexanol, 3-hexenol, 2,4-dimethyl-3-cyclohexene-1-methanol, 4-isopropylcyclohexanol, P-isopropylcyclohexenemethanol, 1-nonanol, 2-nonanol, P-isopropylcyclohexanol, 2-methyl-3-buten-2-ol, 2-hexenol, 1-nonen-3-ol, 3-methyl-1-pentanol, 2,6-dimethyl-heptanol, and 3,4,5,6,6-pentamethyl-2-heptanol. Examples of aldehydes include n-butyl aldehyde, isobutyraldehyde, hexyl aldehyde, heptyl aldehyde, n-nonyl aldehyde, nonadienal, citral, citronellal, benzaldehyde, cinnamic aldehyde, heliotropin, vanillin, triplal, 2-dodecenal, 2,5,6-trimethyl-4-heptanal, trimethylundecenal, 2-decenal, p-tolyl aldehyde, acetaldehyde diethyl acetal, n-octanal, n-decanal, p-isopropylphenylacetaldehyde, octanal dimethyl acetal, n-nonanal, undecanal, 10-undecenal, phenylpropionaldehyde, 3-hexenal, 2-undecenal, and p-methylhydratropaldehyde.Examples of ketones include methyl amyl ketone, methyl nonyl ketone, diacetyl, acetyl propionyl, acetyl butyryl, carvone, menthone, camphor, acetophenone, p-methylacetophenone, ionone, dihydrocarvone, and 2-undecanone. Examples of lactones or oxides include amyl butyrolactone, methylphenyl ethyl glycidate, γ-nonyl lactone, coumarin, cineole, jasmine lactone, methyl r-decalactone, 2,2,6-trimethyl-6-vinyltetrahydropyran, and 5-isoproperol-2-methyl-2-vinyltetrahydrofuran. Examples of ethers include 1,8-cineole, rose oxide, cedrol methyl ether (cedrumber), p-cresyl methyl ether, isoamyl phenyl ethyl ether, 4-phenyl-2,4,6-trimethyl-1,3-dioxane, and anethole. Examples of esters include methyl formate, isopropyl formate, linalyl formate, ethyl acetate, octyl acetate, menthyl acetate, benzyl acetate, cinnamyl acetate, butyl propionate, isoamyl acetate, isopropyl isobutyrate, guanyl isovalerate, allyl caproate, butyl heptylate, octyl caprylate, methyl heptynecarboxylate, ethyl pelahagonate, methyl octynecarboxylate, isoacyl caprate, methyl laurate, ethyl myristate, ethyl benzoate, benzyl benzoate, methyl phenylacetate, butyl phenylacetate, methyl cinnamate, cinnamyl cinnamate, methyl salicylate, ethyl anisate, methyl anthranilate, ethyl pyruvate, ethyl α-butyl butyrate, decyl acetate, and propyl formate.

[0051] Examples of the pigments include natural pigments, synthetic pigments, and mixtures of two or more of these. Specific examples of the natural pigments include red cabbage pigment (purple-red), red radish pigment (red-orange to red-purple), purple sweet potato pigment (purple-red), beet red (red), alkanet pigment (red to red-purple), cochineal pigment (yellow-orange to purple), lac pigment (red-orange to purple), safflower red pigment (red), madder pigment (yellow-orange to red-purple), gardenia red pigment (red), monascus pigment (red), chili pepper pigment (yellow to red-orange), and annatto pigment (yellow). ~red-orange), gardenia yellow (yellow), safflower yellow (yellow), turmeric pigment (yellow), marigold pigment (yellow), caramel pigment (dark brown to black), sorghum pigment (reddish-brown to dark brown), onion pigment (brown), shea nut pigment (brown), pecan nut pigment (brown), chicory pigment (reddish-brown to brown), cacao pigment (reddish-brown to brown), chlorophyll (green), gardenia blue pigment (blue), and spirulina pigment (blue). Specific examples of synthetic dyes include Red No. 1, Red No. 2, Red No. 3, Red No. 4, Red No. 5, Red No. 101, Red No. 102, Red No. 103, Red No. 104, Red No. 105, Red No. 106, Orange No. 1, Orange No. 2, Yellow No. 1, Yellow No. 2, Yellow No. 3, Yellow No. 4, Yellow No. 5, Green No. 1, Green No. 2, Green No. 3, Blue No. 1, Blue No. 2, Purple No. 1, mixed edible dyes, and the like.

[0052] The cleaning sheet of the present invention not only exhibits excellent disinfecting properties and virus inactivation effects, but also has excellent corrosion prevention properties for objects to be cleaned. Therefore, the present invention is not only used to clean various objects to be cleaned in the home to provide a hygienic environment, but is also useful for disinfecting and removing viruses in a wide range of fields, including the medical field, food field, brewing field, and agricultural field. In particular, the present invention not only achieves disinfecting properties, but also achieves both corrosion prevention properties and virus inactivation effects for objects to be cleaned, which were previously problematic, and is therefore suitable for maintaining a hygienic environment in the medical field and food field, where there are many opportunities to clean resins such as plastics, or metals such as aluminum and stainless steel.

[0053] The cleaning sheet of the present invention can be implemented in various forms, and is preferably used, for example, for surface disinfection other than human skin surfaces, for equipment disinfection, or as a product for disinfecting bacteria and viruses in toilets and around beds, or as a product for inactivating viruses. The cleaning sheet of the present invention can be formed in a form in which multiple sheets are laminated, in a form in which a long sheet is wound into a roll, or in a form in which a sheet is folded to an appropriate size, etc. EXAMPLES

[0054] The present invention will be specifically described below with reference to examples and comparative examples. The components of the aqueous disinfectant used in the cleaning sheets of the examples and comparative examples are shown in Tables 1 to 8 below. The numerical values ​​related to the blending amounts shown in Tables 1 to 8 indicate the ratio (mass%) of the pure content of each component to the aqueous disinfectant, and the "balance" indicating the water content indicates the blending amount adjusted so that the total amount of the aqueous disinfectant, which is the final preparation, is 100 mass%. As for the base sheet, the ratio (mass%) of each component fiber in 100 mass% of the base sheet is also shown in Tables 1 to 8. The cleaning sheets were prepared by soaking 100 parts by mass of nonwoven fabric base sheet containing various fibers in the ratios shown in the table with 270 parts by mass of the aqueous disinfectant and storing them in an airtight container for 24 hours. Each cleaning sheet was clamped in a vice with a force of 10 N cm for 10 minutes, and the solution squeezed out was used as the squeezed liquid. The aqueous disinfectant, cleaning sheet, and squeezed solution were used to carry out the measurements and evaluations described below. The measurement results and evaluation results are shown in Tables 1 to 8.

[0055] Component (A) A-1: Alkyl dimethyl benzyl ammonium chloride (alkyl groups are a mixture of 12 to 16 carbon atoms) A-2: Dialkyldimethylammonium chloride (alkyl groups are a mixture of 8 to 10 carbon atoms) A-3: Benzethonium chloride

[0056] (B) Component B-1: 1,2-Benzisothiazolin-3-one B-2: 2-Methyl-4-isothiazolin-3-one B-3: 5-chloro-2-methyl-4-isothiazolin-3-one

[0057] (C) Component C-1: Ion-exchanged water

[0058] (D) Component D-1: Dipotassium hydrogen phosphate D-2: Potassium dihydrogen phosphate D-3: Disodium hydrogen phosphate D-4: Sodium dihydrogen phosphate D-5: Citric acid D-6: Malic acid D-7: Sodium chloride

[0059] (E) Component E-1: Octyldimethylamine oxide E-2: Lauryl dimethylamine oxide E-3: Sodium lauryldiaminoethylglycine E-4: Sodium laurylaminodipropionate E-5: Polyoxyethylene (EO: 6.5 mol) alkyl ether (alkyl group is a mixture of 9 to 11 carbon atoms) E-6: Polyoxyethylene (EO: 15 mol) alkyl ether (alkyl group is a mixture of 12 to 14 carbon atoms)

[0060] Ingredient (F) F-1: Tetrasodium ethylenediaminetetraacetate F-2: Disodium ethylenediaminetetraacetate F-3: Trisodium methylglycine diacetate F-4: Tetrasodium glutamate diacetate

[0061] Other Ingredients G-1: Sodium hydroxide G-2: Hydrochloric acid

[0062] How to measure the pH of the juice: <Calibration of pH Meter> Connect a combined electrode for pH measurement (manufactured by Horiba, Ltd.; Standard ToupH Electrode 9615S-10D) to a pH meter (manufactured by Horiba, Ltd.; pH / Ion Meter F-72), and turn on the power. As the internal solution of the pH electrode, an aqueous saturated potassium chloride solution (3.33 mol / L) was used. Next, fill 100 mL beakers with pH 4.01 standard solution (phthalate standard solution), pH 6.86 standard solution (neutral phosphate standard solution), and pH 9.18 standard solution (borate standard solution) respectively, and immerse them in a constant temperature bath at 25 °C for 30 minutes. Immerse the pH measurement electrode in the temperature-adjusted standard solution for 3 minutes, and perform the calibration operation in the order of pH 6.86, pH 9.18, and pH 4.01. <pH Measurement> Immerse the pH measurement electrode in 100 mL of various squeezed juices adjusted to a constant temperature of 25 °C in a constant temperature bath for 3 minutes, and measure the pH.

[0063] ※1: Antibacterial Test Test Method: Cultivate the test strains in SCD broth medium for bacteria and GP liquid medium for molds until the number of bacteria reaches 2.0×10 8 CFU / mL or more and 9.0×10 8 CFU / mL or less to prepare a bacterial solution. Add 0.1 mL of each test bacterial solution to 10 mL of various squeezed juices, contact them at 25 °C for 15 minutes, and then add a sterilized neutralization solution (SCDLP medium for bacteria and GPLP liquid medium for molds), stir well to prepare a test solution. As bacteria, Pseudomonas aeruginosa NBRC13736 (10 8 CFU / mL level), Staphylococcus aureus NBRC13276 (10 8 CFU / mL level), Escherichia coli ATCC11229 (10 8 CFU / mL level), Alcaligenes faecalis NBRC14479 (10 8 CFU / mL level), Serratia marcescens NBRC12648 (10 8Aspergillus niger NBRC105649 (10 8 CFU / mL level), Trichophyton mentagrophytes ATCC9533 (10 8 CFU / mL level), Candida albicans ATCC11651 (10 8 Three types of bacteria (CFU / mL level) were used.

[0064] 1 mL of each of the above test liquids was collected. The test liquids containing bacteria were mixed with SCD agar medium, and the test liquids containing mold were mixed with PDA medium. Each was cultured in a pour plate to confirm the viable cell count and evaluated according to the following criteria. Evaluation criteria: 1 point: Log reduction of 5 or more of the test bacteria 2 points: Log reduction of the test bacteria is 4 or more and less than 5. 3 points: Log reduction of the test bacteria is 3 or more and less than 4. 4 points: Log reduction of the test bacteria is less than 3 The reduction in the number of bacteria for each species was evaluated using a score.

[0065] Regarding bacteria, the above evaluation scores were averaged for the five types of bacteria, and the disinfecting ability was evaluated according to the following criteria. ◎: Average value is 1.0 or more and less than 1.5 points. ○: Average value is 1.5 points or more and less than 2.5 points. △: Average value is 2.5 points or more and less than 3.5 points. ×: Average value is 3.5 or more.

[0066] Regarding mold, the above evaluation scores were averaged for the three types of mold, and the disinfecting properties were evaluated according to the following criteria. ◎: Average value is 1.0 or more and less than 1.5 points. ○: Average value is 1.5 points or more and less than 2.5 points. △: Average value is 2.5 points or more and less than 3.5 points. ×: Average value is 3.5 or more. For both the disinfection ability against bacteria and the disinfection ability against mold, the practicality was judged as △, ○, or ◎.

[0067] *2:Virus inactivation test Test Method: In a test tube, 0.9 mL of each squeezed liquid was added to 10 samples of each of the following 7 types of viruses. 8 TCID 50 0.1 mL of the virus solution adjusted to 100 / mL was added and mixed in a mixer to prepare a mixture, which was allowed to act at 25°C for 10 minutes. After the action, 0.1 mL of the mixture was sampled and added to 9.9 mL of a stop solution (a cell growth solution containing 2% sodium thiosulfate, 0.2% lecithin, and 1.5% polysorbate 80) to dilute 100 times, and the action of the various squeezed solutions on the virus was stopped. This was used as a sample stock solution for measuring the virus infectivity titer in order to measure the infectivity titer. Similarly, a test was performed using phosphate buffered saline (hereinafter sometimes abbreviated as PBS) instead of the squeezed solution, and this was used as a control. The phosphate buffered saline was prepared by mixing four salts, namely, 8 g of sodium chloride, 0.2 g of potassium chloride, 1.44 g of disodium hydrogen phosphate, and 0.24 g of potassium dihydrogen phosphate, dissolving them in 900 mL of ultrapure water, adjusting the pH to 7.4 with hydrochloric acid, and then diluting the solution to 1 L and sterilizing it in an autoclave.

[0068] Seven types of viruses were used in the above tests: feline calicivirus, mouse norovirus, hepatitis B virus, hepatitis C virus, adenovirus, AIDS virus, and influenza virus. Each virus infectivity measurement sample solution was diluted with PBS to 10 8After preparing dilutions by serially diluting the samples ten-fold up to 100 μL, 50 μL of the sample stock solution for infectivity titer measurement and each dilution step, as well as 50 μL of cell suspension in Dulbecco's modified Eagle's Medium (DMEM) containing 5% fetal bovine serum (FBS), were planted in a 96-well plate. They were then cultured for 4 days in a carbon dioxide incubator at 37°C and 5% CO2. After culture, the presence or absence of CPE (cytopathic effect) due to viral proliferation was observed under an inverted microscope, and the viral infectivity (TCID 50 / mL) was calculated and evaluated according to the following criteria.

[0069] Evaluation criteria: 1 point: Log reduction of virus infectivity of 5 or more 2 points: Log reduction of viral infectivity is 4 or more but less than 5 3 points: Log reduction of viral infectivity is 3 or more but less than 4 4 points: Log reduction of viral infectivity of less than 3 The reduction in the viral infectivity for each virus was evaluated using a score, and the average score for the seven types of viruses was calculated to evaluate the viral inactivation effect according to the following criteria. ◎: Average value is 1.0 or more and less than 1.5 points. ○: Average value is 1.5 points or more and less than 2.5 points. △: Average value is 2.5 points or more and less than 3.5 points. ×: Average value is 3.5 or more. The items were judged as practical with △, ○, and ◎.

[0070] *3: Cleaning test Test Method: The mass of the test piece was measured after attaching and drying simulated soil made of a mixture of beef tallow, soybean oil, and chloroform in a ratio of 1:1:5 to the stainless steel plate (15 x 50 mm) whose mass had been measured. The test piece was fixed on a flat surface, and 50 g of each of the cleaning sheets shown in Tables 1 to 8 was taken out and placed on the test piece in a state where it was folded twice, and a weight of 300 g was further placed on top of it. In this state, the cleaning sheet was moved up and down five times at intervals of once per second. The test piece was then rinsed with ion-exchanged water, air-dried, and then its mass was measured. The cleaning rate was calculated from the change in mass of the test piece before and after wiping using the following formula (1), and was evaluated based on the following evaluation criteria.

[0071] [Number 1] Cleaning rate = (ST) / (SU) × 100 (1) S: Mass of test piece before wiping T: Mass of test piece after wiping U: Mass of stainless steel plate Evaluation criteria: ○: Cleaning rate 70% or more, 100% or less △: Cleaning rate is 30% or more, but less than 70% ×: Cleaning rate less than 30% The evaluation was made as △ or ◯, and the evaluation was made as practical.

[0072] *4: Evaluation test regarding usability Test Method: Ten sheets of nonwoven fabric (200mm x 250mm) made of various materials shown in Tables 1 to 8 were used and soaked in 200mL of various aqueous disinfectants. After confirming that the solution had spread sufficiently, one sheet of nonwoven fabric soaked in the solution was taken out and wiped five times up and down and five times left and right over a clean stainless steel surface of about 30cm square, and the feel of use was confirmed by a sensory test in terms of foaming, stickiness, wateriness, stiffness, wetness, etc. Panelists were selected randomly, with n=10 for each sample. Statistical processing was performed to analyze the evaluation results, and the item with the most evaluations was adopted as the evaluation result.

[0073] Evaluation criteria: Good: Not foamy, sticky, watery or stiff, with just the right amount of moisture for a pleasant feel. △: Slightly foamy, sticky, watery, or stiff, or lacking the appropriate amount of moisture. ×: Extremely foamy, sticky, watery or stiff, or barely moist and uncomfortable to use. The evaluation was made as △ or ◯, and the evaluation was made as practical.

[0074] *5: Evaluation test for corrosiveness of the object to be wiped Test Method: A total of 32 panels (2 each of 16 types of resin panels (vinyl chloride, ABS, PET, PBT, polypropylene, polyethylene, acrylic, polycarbonate, silicone, Teflon (registered trademark)) and metal panels (brass, soft iron, zinc-nickel, aluminum, copper, stainless steel) cut to sizes of 3cm x 5cm were immersed in each type of squeezed solution and stored at 25°C for 48 hours, after which each panel was rinsed with ion-exchanged water and dried at room temperature for 24 hours, after which the degree of corrosion was evaluated visually. Evaluation criteria: ◎: No discoloration, deterioration, or cracks are observed on any of the panels. ○: Less than 20% of the panels show discoloration, deterioration, cracks, etc. △: Discoloration, deterioration, cracks, etc. are observed in 20% to less than 30% of the panels. ×: Discoloration, deterioration, cracks, etc. are observed in 30% or more of the panels. The items were judged as practical with △, ○, and ◎.

[0075] *6: Storage stability test Test Method: 100 g of each aqueous disinfectant was placed in a polypropylene container and left to stand at -5°C, 25°C, and 40°C for one month, after which the appearance was observed and evaluated according to the following criteria. Evaluation criteria: ○: No separation or turbidity was observed and the mixture was stable. △: No overall separation, but some turbidity is observed. ×: Separation or turbidity is observed. The evaluation was made as △ or ◯, and the evaluation was made as practical.

[0076] *7: Evaluation test regarding uneven distribution of drugs Test Method: Nonwoven fabrics (200 mm x 250 mm x 300 sheets) made of various materials shown in Tables 1 to 8 were placed in a 3 L polypropylene bag, impregnated with 2 L of various aqueous disinfectants, and stored at 25°C for 24 hours. After that, the bag was cut in half lengthwise and visually observed to see if the chemical solution had penetrated to the center. Evaluation criteria: ◎: The solution is evenly soaked into the entire area. ○: The solution has soaked into almost the entire area. △: Some areas are not saturated. ×: There are many areas that have not soaked in. The items were judged as practical with △, ○, and ◎.

[0077] [Table 1]

[0078] [Table 2]

[0079] [Table 3]

[0080] [Table 4]

[0081] [Table 5]

[0082] [Table 6]

[0083]

Table 7

[0084]

Table 8

Claims

1. A cleaning sheet comprising a base sheet impregnated with an aqueous disinfectant, The aqueous disinfectant is As the component (A), a quaternary ammonium salt in an amount of 0.01 mass% or more and less than 0.5 mass%; (B) 0.0001% by mass or more and less than 0.1% by mass of an isothiazolinone compound; (C) water as a component; The cleaning sheet contains, as the component (A), an alkyl dimethyl benzyl ammonium salt (component (A-1)) and a dialkyl dimethyl ammonium salt (component (A-2)), and the pH of a squeezed liquid from the base sheet is 4.0 or more and 9.5 or less.

2. The cleaning sheet according to claim 1 , wherein the base sheet comprises recycled fibers.

3. 3. The cleaning sheet according to claim 1 or 2, wherein the aqueous disinfectant further contains, as a component (D), at least one selected from an inorganic electrolyte, and an organic acid or a salt thereof.

4. 3. The cleaning sheet according to claim 1, wherein the aqueous disinfectant further comprises, as a component (E), at least one surfactant selected from an anionic surfactant, a nonionic surfactant, and an amphoteric surfactant.

5. 3. The cleaning sheet according to claim 1, wherein the aqueous disinfectant further comprises a chelating agent as a component (F).

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