Method for disinfecting textile products

Abstract

To provide a method for disinfecting textile products with excellent disinfecting efficacy.SOLUTION: A method for disinfecting textile products includes a step of contacting (a) a treatment liquid 1, which contains a polymer with a carboxy group and water and has a pH of less than 5, with a textile product, followed by a step of contacting the textile product with (b) a treatment liquid 2, which contains an anionic surfactant and water and has a pH of less than 6.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to a method for sterilizing textile products. [Background technology]

[0002] 2. Description of the Related Art In recent years, due to increased awareness of hygiene, there is a demand for further improvement in not only the cleaning performance but also the sterilization performance when textile products such as clothing are subjected to treatments such as washing.

[0003] Patent Document 1 discloses an acidic laundry detergent composition comprising: (a) less than about 20% by weight of the detergent of a predetermined surfactant system; (b) an organic acidifying agent; and (c) an alkaline neutralizing agent added in an amount necessary to raise the pure pH of the detergent composition to greater than or equal to about 2.5 but less than or equal to about 3.0. Patent Document 2 discloses an agent for imparting easy cleaning properties to textile products, which contains (A) a polymeric compound containing a structural unit derived from an unsaturated carboxylic acid and having a weight-average molecular weight of 50,000 or more and 10,000,000 or less, (B) a polymeric compound containing a structural unit derived from a sugar or a structural unit derived from vinyl alcohol and having a weight-average molecular weight of 2,000 or more and 500,000 or less (excluding component (A)), and (C) water. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Special Publication No. 2015-508445 [Patent Document 2] Patent Publication No. 2022-80076 Summary of the Invention [Problem to be solved by the invention]

[0005] However, when many textile products are put into a washing machine or when textile products are washed in a laundry net to prevent damage during washing, the textile products overlap, and the active ingredients of disinfectants and the like are less likely to reach the overlapping parts of the textile products. As a result, there are some parts of the textile product where the active ingredients reach well and some parts where they do not. In particular, if bacteria remain on the textile product, they may cause the textile product to smell. The present invention provides a method for sterilizing textile products having excellent sterilizing performance. [Means for solving the problem]

[0006] The present invention relates to a method for treating a textile product, comprising contacting a textile product with a treatment liquid 1 containing (a) a polymer having a carboxy group (hereinafter referred to as component (a)) and water and having a pH of less than 5; The present invention relates to a method for sterilizing a textile product, which comprises contacting the textile product with treatment liquid 1, and then contacting the textile product with treatment liquid 2, which contains (b) an anionic surfactant (hereinafter referred to as component (b)) and water and has a pH of less than 6. Effect of the Invention

[0007] According to the present invention, a method for sterilizing textile products having excellent sterilizing performance is provided. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] The reason why the method for sterilizing textile products of the present invention has excellent sterilizing performance for textile products is not clear, but is presumed to be as follows. As a result of extensive research, the inventors have found that by contacting a textile product with a treatment liquid containing component (b), an anionic surfactant, and having a pH of less than 6, component (b) exhibits bactericidal properties in the textile product. It is presumed that by contacting the textile product with a treatment solution containing the polymer having a carboxy group, which is component (a), at a pH of less than 5 before contacting the textile product with the treatment solution containing component (b), the penetration of component (b) into the textile product is improved during the subsequent contact of the textile product with the treatment solution containing component (b). It is presumed that this has improved the disinfecting performance of the textile product by increasing the amount of component (b) that penetrates into the textile product and improving the contact efficiency between the bacteria present inside and component (b). The method for sterilizing textile products of the present invention is not limited to the above-mentioned mechanism of action.

[0009] <How to disinfect textile products> The method for sterilizing a textile product of the present invention comprises contacting the textile product with a treatment liquid 1 containing (a) a polymer having a carboxy group (hereinafter referred to as component (a)) and water and having a pH of less than 5; After contacting the textile product with treatment liquid 1, the textile product is contacted with treatment liquid 2, which contains (b) anionic surfactant [hereinafter referred to as component (b)] and water and has a pH of less than 6. Treatment liquid 2 contains component (b) as a sterilizing component that sterilizes the textile product.

[0010] The method for sterilizing a textile product of the present invention includes a step 1 of contacting a textile product with a treatment liquid 1 containing the component (a) and water and having a pH of less than 5; The method may be a method for sterilizing a textile product, which comprises, after step 1, carrying out step 2 of contacting the textile product with a treatment liquid 2 containing component (b) and water and having a pH of less than 6.

[0011] In the present invention, sterilization includes not only removing bacteria from a textile product but also killing bacteria attached to the textile product and inhibiting the growth of bacteria attached to the textile product. Therefore, the method for sterilizing a textile product of the present invention may be a method for sterilizing a textile product and / or a method for imparting antibacterial properties to a textile product. Furthermore, the processing liquid 1 and the processing liquid 2 may be the same processing liquid or different processing liquids. Furthermore, the processing liquid 1 can be diluted to obtain the processing liquid 2.

[0012] <Component (a)> The component (a) is a polymer having a carboxy group. From the viewpoint of disinfecting performance, the component (a) is a polymer containing a structural unit derived from a carboxylic acid or a salt thereof having a reactive unsaturated group having preferably 3 to 6 carbon atoms, more preferably 3 to 5 carbon atoms (hereinafter referred to as structural unit (a1)). The number of carbon atoms in the structural unit (a1) is the total number of carbon atoms in the carboxylic acid.

[0013] The structural unit (a1) may be one or more selected from the group consisting of structural units derived from acrylic acid, methacrylic acid, maleic acid, maleic anhydride, fumaric acid, itaconic acid, crotonic acid, citraconic acid, salts thereof, and acid anhydrides thereof.

[0014] From the viewpoint of disinfecting performance, the structural unit (a1) is preferably one or more types selected from structural units derived from acrylic acid, methacrylic acid, maleic acid, salts thereof, and maleic anhydride, and more preferably one or more types selected from structural units derived from acrylic acid, methacrylic acid, and salts thereof. The salt is at least one selected from the group consisting of sodium salts, potassium salts, alkanolamine salts, and ammonium salts. The salt may be formed by using a salt-type compound as a monomer, or by neutralization after polymerization.

[0015] From the viewpoint of disinfecting performance, the proportion of the structural unit (a1) among all structural units of the component (a) is preferably at least 20 mol % and preferably no greater than 100 mol %, and may also be 100 mol %.

[0016] The component (a) may contain a structural unit other than the structural unit (a1) [hereinafter referred to as the structural unit (a2)]. That is, the component (a) may specifically be a polymer containing the structural unit (a1) and the structural unit (a2) described below.

[0017] An example of the structural unit (a2) is a structural unit represented by general formula (a2-1) shown below.

[0018] [ka] [In the formula, R 1a represents a hydrogen atom or a methyl group, R 2a represents a hydrogen atom or an alkyl group having 1 to 3 carbon atoms; X 1 represents a divalent alkylene group having 1 to 6 carbon atoms, a direct bond, or a carbonyl group, and n represents the average number of moles of ethylene oxide added and is a number of 5 to 150.

[0019] In formula (a2-1), R 1a From the viewpoint of disinfecting performance, a methyl group is preferred. In formula (a2-1), R 2a is preferably a hydrogen atom or a methyl group from the viewpoint of disinfecting performance. In formula (a2-1), X 1 is preferably a direct bond or a carbonyl group from the viewpoint of disinfecting performance. In formula (a2-1), n ​​is the average number of moles of ethylene oxide added, and from the viewpoint of sterilization performance, it is 5 or more, preferably 10 or more, more preferably 15 or more, and 150 or less, preferably 140 or less, more preferably 130 or less.

[0020] The structural unit represented by the following general formula (a2-1) can be obtained using a corresponding monomer, for example, a monomer selected from the group consisting of (1) a monoester of polyethylene glycol and acrylic acid or methacrylic acid, (2) an ester of polyethylene glycol capped at one end with an alkyl group, such as methoxypolyethylene glycol, and acrylic acid or methacrylic acid, (3) a monoether of polyethylene glycol and vinyl alcohol, allyl alcohol, methallyl alcohol, or isoprenyl alcohol, (4) an ether of polyethylene glycol capped at one end with an alkyl group, such as methoxypolyethylene glycol, and allyl alcohol or methallyl alcohol, and (5) an ethylene oxide adduct to acrylic acid, methacrylic acid, maleic acid, allyl alcohol, or methallyl alcohol.

[0021] The structural unit (a2) may be a structural unit represented by -SO2-. The method of introducing such a structural unit (a2) into a polymer is to blow a predetermined amount of SO2 gas into a solution containing a monomer corresponding to the structural unit (a1), and polymerize the resulting polymer using a polymerization initiator selected from benzoyl peroxide, t-butyl hydroperoxide, cumene hydroperoxide, dilauroyl peroxide, azobisisobutyronitrile, azobisisovalernitrile, 2,2'-azobis(2-amidinopropane), t-butyl hydroperoxide, cumene hydroperoxide, methyl ethyl ketone peroxide, cyclohexanone peroxide, peracetic acid, perbenzoic acid, persulfates, and hydrogen peroxide. A solvent can be used during polymerization, specifically, water, alcohols selected from methanol, ethanol, and propanol, ketones selected from acetone and methyl ethyl ketone, dimethyl sulfoxide, dimethylformamide, dimethylacetamide, N-methylimidazolidinone, acetonitrile, propionitrile, toluene, xylene, and hexane can be used. The polymerization temperature varies depending on the combination of the solvent and initiator, and is preferably from -20°C to 200°C, more preferably from -10°C to 100°C. In the present invention, polymerization can also be performed by light or radiation, and polymerization can be efficiently performed by irradiating light with a wavelength of 300 nm to 450 nm.

[0022] The structural unit (a2) may be a structural unit containing a diallyl quaternary ammonium salt. Examples of the structural unit containing a diallyl quaternary ammonium salt include structural units represented by the following general formula (a2-2) or (a2-3).

[0023] [ka]

[0024] [In the formula, R 3a and R 4amay be the same or different, and each represents a hydrogen atom, an alkyl group having 1 to 18 carbon atoms, an aryl group (e.g., a phenyl group), a hydroxyalkyl group, an amidoalkyl group, a cyanoalkyl group, an alkoxyalkyl group, or a carboalkoxyalkyl group; R 5a and R 6a may be the same or different and represent a hydrogen atom, an alkyl group having 1 to 3 carbon atoms, or a phenyl group; X - indicates an anion (chloride ion, bromide ion, iodide ion, sulfate anion, sulfonate anion, methyl sulfate anion, phosphate anion, nitrate anion, etc.).

[0025] The weight average molecular weight of component (a) is, from the viewpoint of disinfection performance, preferably 1,000 or more, more preferably 1,500 or more, even more preferably 2,000 or more, and from the viewpoint of disinfection performance, preferably 100,000 or less, more preferably 70,000 or less, even more preferably 50,000 or less, and still more preferably 30,000 or less.

[0026] The weight average molecular weight of component (a) was determined by gel permeation chromatography under the following conditions using a mixed solvent of acetonitrile and water (phosphate buffer) as a developing solvent and polyethylene glycol as a standard substance. Column: Tosoh Corporation G4000PWXL + G2500PWXL (2 columns connected) Detector: Differential refractometer Eluent: 0.2M phosphate buffer (KH2PO4, Na2HPO4, pH=7) / acetonitrile=9 / 1 (volume ratio) Sample: Polyethylene glycol Conditions: Column temperature: 40°C, flow rate: 0.5mL / min, concentration: 0.05mg / mL

[0027] The component (a) may be a homopolymer containing the structural unit (a1), a copolymer containing a plurality of different structural units (a1), or a copolymer containing the structural unit (a1) and the structural unit (a2). When the component (a) contains the structural unit (a1) and the structural unit (a2), the molar ratio of the structural unit (a2) in the total structural units of the component (a) is preferably 50 mol% or more, more preferably 60 mol% or more, and preferably 95 mol% or less, more preferably 90 mol% or less, and even more preferably 80 mol% or less, from the viewpoint of sterilization performance. The molar ratio can also be calculated from the amount (molar ratio) of the monomer corresponding to the structural unit when synthesizing the component (a) (hereinafter, the same applies to the molar ratio of the structural unit and the molar % of the structural unit).

[0028] From the viewpoint of sterilization performance, the component (a) is preferably one or more polymers selected from polyacrylic acid and its salts, polymethacrylic acid and its salts, acrylic acid-maleic acid copolymer and its salts, methacrylic acid-maleic acid copolymer and its salts, and diisobutylene-maleic acid copolymer and its salts, more preferably polyacrylic acid or its salts. The component (a) may be a mixture of two or more of the above polymers. The salt is preferably a potassium salt or a sodium salt.

[0029] The acrylic acid-maleic acid copolymer or its salt of component (a) has a molar ratio of acrylic acid / maleic acid of preferably 0.25 or more, more preferably 0.4 or more, and preferably 4 or less, more preferably 2.5 or less, from the viewpoint of disinfection performance. The acrylic acid-maleic acid copolymer or its salt of component (a) may be a copolymer containing a monomer other than acrylic acid and maleic acid that is copolymerizable with acrylic acid and / or maleic acid. The molar ratio of the monomer other than acrylic acid and maleic acid that is copolymerizable with acrylic acid and / or maleic acid in the total constituent monomers is 0 mol% or more, and preferably 5 mol% or less, more preferably 3 mol% or less, and even more preferably 0 mol%, from the viewpoint of disinfection performance.

[0030] <(b) Component> Component (b) is an anionic surfactant. By optionally using component (b) in treatment liquid 1 of the present invention, the sterilization performance in treatment liquid 2 can be further improved. In addition, in treatment liquid 2, component (b) has a sterilization effect. Examples of component (b) include one or more anionic surfactants selected from alkylarylsulfonic acid type surfactants, sulfate ester type surfactants, alkanesulfonic acid type surfactants, olefinsulfonic acid type surfactants, sulfosuccinic acid alkyl ester type surfactants, and sulfofatty acid ester type surfactants.

[0031] The alkylarylsulfonic acid surfactant may be an alkylbenzenesulfonate. Specifically, from the viewpoint of sterilization performance, the alkyl group may have a carbon number of preferably 6 or more, more preferably 8 or more, and preferably 18 or less, more preferably 15 or less. The carbon atom of the alkyl group bonded to the carbon atom of the benzene ring of the alkylbenzenesulfonate may be a secondary carbon atom.

[0032] Examples of sulfate ester type surfactants include anionic surfactants having a hydrocarbon group having 8 to 20 carbon atoms and a sulfate ester group. From the viewpoint of disinfecting performance, the hydrocarbon group preferably has 8 or more carbon atoms, more preferably 10 or more, even more preferably 12 or more, and preferably 20 or less, more preferably 18 or less, even more preferably 14 or less, and even more preferably 12 or less. The hydrocarbon group is preferably an alkyl group. Examples of the sulfate type surfactant include alkyl sulfate salts and polyoxyalkylene alkyl ether sulfate salts. From the viewpoint of disinfecting performance, the alkyl sulfate ester salt is preferably an alkyl sulfate ester salt having an alkyl group having preferably 8 or more, more preferably 10 or more, and preferably 20 or less, more preferably 18 or less, even more preferably 14 or less, and even more preferably 12 or less, and further preferably a linear or branched alkyl group. As the polyoxyalkylene alkyl ether sulfate, from the viewpoint of disinfection performance, a polyoxyalkylene alkyl ether sulfate having an alkyl group having preferably 8 or more, more preferably 10 or more, and preferably 20 or less, more preferably 18 or less, even more preferably 14 or less, and even more preferably 12 or less, further a straight-chain or branched-chain alkyl group, and an average addition molar number of oxyalkylene groups having from 2 to 3 carbon atoms is preferably 0.1 or more, more preferably 0.3 or more, even more preferably 0.4 or more, and preferably 6 or less, more preferably 3 or less, and even more preferably 1.5 or less, is preferred. From the viewpoint of disinfection performance, the oxyalkylene group is preferably an oxyalkylene group having 2 carbon atoms.

[0033] From the viewpoint of disinfecting performance, the alkane sulfonate surfactant may be an alkane sulfonate salt having an alkane moiety with preferably 8 or more, more preferably 10 or more, even more preferably 14 or more, and preferably 20 or less, more preferably 18 or less.

[0034] Examples of olefin sulfonic acid surfactants include α-olefin sulfonates and internal olefin sulfonates. From the viewpoint of sterilization performance, the α-olefin sulfonates have an olefin moiety with a carbon number of preferably 8 or more, more preferably 10 or more, even more preferably 14 or more, and preferably 22 or less, more preferably 20 or less, and even more preferably 18 or less. The internal olefin sulfonates have an olefin moiety with a carbon number of preferably 8 or more, more preferably 12 or more, even more preferably 16 or more, and preferably 24 or less, more preferably 20 or less, and even more preferably 18 or less.

[0035] From the viewpoint of disinfecting performance, the sulfosuccinic acid alkyl ester surfactant is a monoester and / or diester, preferably a diester, of sulfosuccinic acid with a fatty alcohol having a carbon number of preferably 5 or more, more preferably 6 or more, even more preferably 7 or more, and preferably 18 or less, more preferably 14 or less, even more preferably 10 or less. From the viewpoint of disinfecting performance, the fatty alcohol is preferably a branched alcohol.

[0036] Examples of sulfofatty acid ester surfactants include α-sulfofatty acid salts in which the fatty acid moiety has 10 to 18 carbon atoms, and α-sulfofatty acid lower alkyl ester salts in which the fatty acid moiety has 10 to 18 carbon atoms and the ester moiety has 1 to 5 carbon atoms.

[0037] Examples of the salt of component (b) include alkali metal salts such as sodium salts and potassium salts, alkaline earth metal salts such as magnesium salts, and organic amine salts such as ammonium salts, monoethanolamine salts, diethanolamine salts, and triethanolamine salts. From the viewpoint of disinfecting performance, alkali metal salts are preferred, and sodium salts are more preferred.

[0038] From the viewpoint of disinfecting performance, the component (b) is preferably one or more anionic surfactants selected from alkylbenzene sulfonates having an alkyl group having 6 or more carbon atoms and 18 or less, preferably 15 or less, polyoxyalkylene alkyl ether sulfates having an alkyl group with 8 or more and 18 or less carbon atoms, alkyl sulfates having an alkyl group with 8 or more and 18 or less carbon atoms, and α-olefin sulfonates having an olefin moiety with 8 or more and 18 or less carbon atoms.

[0039] <Water> Treatment liquid 1 and treatment liquid 2 contain water. Examples of water include deionized water, tap water, groundwater, lake water, river water, etc. Water is used in an amount such that the composition of treatment liquid 1 or treatment liquid 2 becomes 100 mass % as the balance other than component (a) and the optional components described below. From the viewpoint of improving sterilization performance, treatment liquid 1 contains water in an amount of preferably 70% by mass or more, more preferably 80% by mass or more, even more preferably 90% by mass or more, and preferably less than 100% by mass, more preferably 99% by mass or less. From the viewpoint of sterilization performance, the treatment liquid 2 contains water in an amount of preferably 70% by mass or more, more preferably 80% by mass or more, even more preferably 90% by mass or more, and preferably less than 100% by mass, more preferably 99% by mass or less.

[0040] The water is preferably water having hardness. From the viewpoint of sterilization performance, the hardness of the water is preferably 1° dH or more, more preferably 2° dH or more, and preferably 20° dH or less, more preferably 18° dH or less, even more preferably 15° dH or less, and even more preferably 10° dH or less, on the German hardness scale.

[0041] Here, German hardness (°dH) in this specification refers to the concentration of calcium and magnesium in water expressed as 1 mg / L (ppm) = approximately 0.056°dH (1°dH = 17.8 ppm) in CaCO3 equivalent concentration. The calcium and magnesium concentrations for this German hardness are determined by a chelate titration method using disodium ethylenediaminetetraacetic acid. A specific method for measuring the German hardness of water in this specification is shown below.

[0042] <Method of measuring water hardness in Germany> 〔reagent〕 0.01 mol / L EDTA·2Na solution: 0.01 mol / L aqueous solution of disodium ethylenediaminetetraacetate (titration solution, 0.01M EDTA-Na2, manufactured by Sigma-Aldrich) ·Universal BT indicator (product name: Universal BT Co., Ltd., manufactured by Dojindo Laboratories) Ammonia buffer solution for hardness measurement (67.5 g of ammonium chloride dissolved in 570 mL of 28 w / v% ammonia water, and the total volume made up to 1000 mL with ion-exchanged water) [Measurement of hardness] (1) Using a volumetric pipette, collect 20 mL of sample water into a conical beaker. (2) Add 2 mL of ammonia buffer solution for hardness measurement. (3) Add 0.5 mL of Universal BT indicator. After addition, confirm that the solution is reddish purple. (4) While shaking the conical beaker well, add 0.01 mol / L EDTA·2Na solution dropwise from the burette until the sample water turns blue, which is the endpoint of the titration. (5) Total hardness is calculated using the following formula. Hardness (°dH)=T×0.01×F×56.0774×100 / A T:0.01mol / L Titration amount of EDTA・2Na solution (mL) A: Sample volume (20 mL, volume of sample water) F: Factor of 0.01mol / L EDTA·2Na solution

[0043] The method for sterilizing textile products of the present invention will be described in detail with reference to specific examples. However, the method for sterilizing textile products of the present invention is not limited to the specific examples. The method for sterilizing a textile product of the present invention includes a step 1 of contacting textile fibers with a treatment liquid 1 containing the component (a) and water and having a pH of less than 5; After step 1, the method includes step 2 of contacting the textile product treated in step 1 with a treatment liquid 2 containing the component (b) and water and having a pH of less than 6.

[0044] <Process 1> In step 1, a textile product is contacted with treatment liquid 1 containing component (a) and having a pH of less than 5.0. That is, in step 1, the textile product is treated with treatment liquid 1 containing component (a) under conditions of a pH of less than 5. Step 1 is a step carried out before step 2, and is a step for modifying the textile product. In addition, it is also possible to carry out one or more steps selected from a dehydration step for reducing the amount of treatment liquid 1 contained in the textile product obtained after step 1, and a drying step for drying the textile product obtained after step 1, and then carry out step 2. The pH of treatment liquid 1 is the pH at the temperature when treating the textile product, and the pH of treatment liquid 1 may be less than 5 at 25°C.

[0045] From the viewpoint of sterilization performance, the pH of treatment liquid 1 is preferably 1 or more, more preferably 2 or more, and from the viewpoint of sterilization performance, it is less than 5, preferably 4.5 or less, more preferably 4 or less, and still more preferably 3 or less. The preferable range of the pH of the above treatment liquid 1 is the preferable range at the temperature when treating the textile product. Note that the pH of treatment liquid 1 at 25°C may be within the above range.

[0046] <Method for measuring pH> The pH of treatment liquid 1 at the temperature when treating the textile product, and further at 25°C, is specifically measured by the following method for measuring pH. Connect a combined electrode for pH measurement (for example, made by Horiba, Ltd., glass sliding sleeve type) with the internal liquid of the pH electrode being a saturated potassium chloride aqueous solution (3.33 mol / L) to a pH meter (for example, pH / Ion Meter F-23 made by Horiba, Ltd.). Next, fill 100 mL beakers with pH 4.01 standard solution (phthalate standard solution), pH 6.86 (neutral phosphate standard solution), and pH 9.18 standard solution (borate standard solution) respectively, and immerse them in a constant temperature bath at the treatment temperature or 25°C for 30 minutes. Immerse the pH measurement electrode in the temperature-adjusted standard solution for 3 minutes, and perform calibration operations in the order of pH 6.86 → pH 9.18 → pH 4.01. Adjust the treatment liquid 1 to be measured to the treatment temperature or 25°C, immerse the electrode of the above pH meter in the sample, and measure the pH after 1 minute. Note that the pH of treatment liquid 2 can also be determined by the same method. In this case, read treatment liquid 1 as treatment liquid 2, and measure the pH of treatment liquid 2 in the same way as treatment liquid 1.

[0047] Treatment liquid 1 contains component (a). In step 1, when the textile product is immersed in treatment liquid 1 and treated with treatment liquid 1, from the viewpoint of sterilization performance, the treatment liquid 1 contains component (a) in an amount of preferably 0.0001 mass % or more, more preferably 0.001 mass % or more, even more preferably 0.01 mass % or more, still more preferably 0.1 mass % or more, still more preferably 1 mass % or more, and preferably less than 100 mass %, more preferably 50 mass % or less, and more preferably 10 mass % or less.

[0048] Furthermore, in step 1, when the textile product is treated with treatment liquid 1 by applying or spraying it thereon, from the viewpoint of sterilization performance, the treatment liquid 1 contains component (a) in an amount of preferably 0.0001% by mass or more, more preferably 0.001% by mass or more, even more preferably 0.01% by mass or more, still more preferably 0.1% by mass or more, still more preferably 0.5% by mass or more, still more preferably 1% by mass or more, and preferably 10% by mass or less, more preferably 5% by mass or less.

[0049] From the viewpoint of disinfecting performance, it is preferable that the treatment liquid 1 contains the component (b). When the treatment liquid 1 contains the component (b), the disinfecting performance in step 2 can be further improved. When treatment liquid 1 contains component (b) and in step 1, a textile product is immersed in treatment liquid 1 and treated with treatment liquid 1, from the viewpoint of sterilization performance, treatment liquid 1 contains component (b) in an amount of preferably 0.001% by mass or more, more preferably 0.01% by mass or more, and preferably 50% by mass or less, more preferably 10% by mass or less, and even more preferably 1% by mass or less.

[0050] Furthermore, when treatment liquid 1 contains component (b) and treatment liquid 1 is applied or sprayed onto a textile product in step 1 to treat the textile product with treatment liquid 1, from the viewpoint of sterilization performance, treatment liquid 1 preferably contains component (b) in an amount of 0.00001 mass % or more, more preferably 0.0001 mass % or more, even more preferably 0.001 mass % or more, and preferably 50 mass % or less, more preferably 30 mass % or less, and even more preferably 20 mass % or less.

[0051] <(c) component> Treatment liquid 1 may contain (c) a pH adjuster (hereinafter referred to as component (c)). Component (c) may be selected from an acidic agent and an alkaline agent. Component (c) is blended in an amount that adjusts the pH of treatment liquid 1 to the above range.

[0052] The acid agent may be an inorganic acid or an organic acid. Specific examples of inorganic acids include hydrochloric acid and sulfuric acid. Specific examples of organic acids include monovalent or polyvalent carboxylic acids having 1 to 10 carbon atoms, or monovalent or polyvalent sulfonic acids having 1 to 20 carbon atoms. More specific examples include methylsulfuric acid, ethylsulfuric acid, p-toluenesulfonic acid, (o-, m-, p-)xylenesulfonic acid, benzenesulfonic acid, formic acid, glycolic acid, citric acid, benzoic acid, and salicylic acid. The alkaline agent may be an inorganic base or an organic base. Specific examples of the inorganic base include sodium hydroxide and potassium hydroxide. Specific examples of the organic base include monoethanolamine, diethanolamine, and triethanolamine.

[0053] The treatment liquid 1 may optionally contain a thickener, a defoamer, and a fragrance, provided that the effects of the present invention are not impaired.

[0054] From the viewpoint of sterilization performance, the temperature of the treatment liquid 1 that is brought into contact with the textile product is preferably 0°C or higher, more preferably 5°C or higher, even more preferably 10°C or higher, and preferably 60°C or lower, more preferably 50°C or lower, even more preferably 40°C or lower. In addition, from the viewpoint of sterilization performance, the contact time between the textile product and the treatment liquid 1 is preferably 10 minutes or more, more preferably 20 minutes or more, even more preferably 30 minutes or more, and preferably 180 minutes or less, more preferably 120 minutes or less, even more preferably 60 minutes or less.

[0055] In step 1, the textile product is contacted with the treatment liquid 1 preferably at least once, more preferably at least three times, from the viewpoint of sterilization performance, and preferably no more than 20 times, more preferably no more than 10 times, from the viewpoint of sterilization performance. In step 1, a mechanical force may be applied to the textile product by contacting the textile product with treatment liquid 1. Examples of a method for applying a mechanical force to the textile product include a method of applying an external force by a water flow using a commercial washing machine or a home washing machine. In addition, after treating the textile product with treatment liquid 1, the textile product may be rinsed with water.

[0056] <Process 2> In step 2, the textile product is brought into contact with treatment liquid 2, which contains component (b) and has a pH of less than 6. Step 2 is a step carried out after step 1, in which the textile product treated with treatment liquid 1 is further treated with treatment liquid 2 to sterilize the textile product. In addition, one or more steps selected from a dehydration step for reducing the amount of treatment liquid 2 contained in the textile product obtained after step 2, and a drying step for drying the textile product obtained after step 2 may be performed after step 2. After performing these steps, step 1 may also be performed. In step 2, the textile product is treated with treatment liquid 2 containing component (b) under conditions of pH less than 6. The pH of treatment liquid 2 is determined by the temperature at which the textile product is treated, and treatment liquid 2 may have a pH of less than 6 at 25°C.

[0057] From the viewpoint of sterilization performance, the pH of the treatment liquid 2 is preferably 2 or more, more preferably 3 or more, and even more preferably 4 or more, and from the viewpoint of sterilization performance, it is less than 6, preferably 5.5 or less, and more preferably 5 or less. The preferred range of the pH of the treatment liquid 2 is the preferred range at the temperature when treating the textile product. The pH of the treatment liquid 2 at 25°C may be in the above range.

[0058] In step 2, the textile product can be treated with treatment liquid 2 by immersing it in treatment liquid 2. When the textile product is immersed in treatment liquid 2, a mechanical force may be applied to the textile product. Examples of a method for applying a mechanical force to the textile product include a method of applying an external force by a water flow using a commercial washing machine or a home washing machine. In addition, after treating the textile product with treatment liquid 2, the textile product may be rinsed with water. From the viewpoint of sterilization performance, the treatment liquid 2 contains component (b) in an amount of preferably 0.001 mass % or more, more preferably 0.01 mass % or more, and preferably 50 mass % or less, more preferably 10 mass % or less, and even more preferably 1 mass % or less.

[0059] The treatment liquid 2 preferably has hardness. From the viewpoint of sterilization performance, the hardness of the treatment liquid 2 is preferably 1° dH or more, more preferably 2° dH or more, and preferably 20° dH or less, more preferably 18° dH or less, even more preferably 15° dH or less, and even more preferably 10° dH or less, on the German hardness scale. The hardness of the treatment liquid 2 is determined by the chelate titration method using disodium ethylenediaminetetraacetic acid, specifically shown in the above <Method for measuring German water hardness>.

[0060] Treatment liquid 2 may contain (c) a pH adjuster [component (c)]. In treatment liquid 2, the preferred aspects of component (c) are the same as those of component (c) in treatment liquid 1. Component (c) is blended in an amount such that the pH of treatment liquid 2 falls within the above-mentioned range.

[0061] The treatment liquid 2 may optionally contain a thickener, a defoamer, and a fragrance, provided that the effects of the present invention are not impaired.

[0062] From the viewpoint of sterilization performance, the temperature of the treatment liquid 2 that is brought into contact with the textile product is preferably 5°C or higher, more preferably 10°C or higher, even more preferably 20°C or higher, and preferably 50°C or lower, more preferably 45°C or lower, even more preferably 40°C or lower. In addition, from the viewpoint of sterilization performance, the contact time between the textile product and the treatment liquid 2 is preferably 2 minutes or more, more preferably 5 minutes or more, even more preferably 10 minutes or more, and preferably 360 minutes or less, more preferably 180 minutes or less.

[0063] The method for sterilizing a textile product of the present invention may take the following forms (1) to (5). (1) Treatment liquid 1 and treatment liquid 2 are different treatment liquids, and after immersing a textile product in treatment liquid 1, the treated textile product is further immersed in treatment liquid 2; (2) Treatment liquid 1 and treatment liquid 2 are different treatment liquids, treatment liquid 1 is brought into contact with or sprayed onto a textile product, and then the textile product is immersed in treatment liquid 2; (3) Treatment liquid 1 and treatment liquid 2 are different treatment liquids, and after treating a textile product with treatment liquid 2, the textile product is finished with treatment liquid 1, and after use, the textile product is treated again with treatment liquid 2; (4) Treatment liquid 1 and treatment liquid 2 are prepared from one treatment composition, the treatment composition is diluted with water to prepare treatment liquid 1, and treatment liquid 1 is further diluted with water to prepare treatment liquid 2, in which during the water injection process, the textile product is treated with treatment liquid 1, and after the water injection, the textile product is treated with treatment liquid 2, (5) Treatment agent 1 and treatment agent 2 are prepared from different treatment agent compositions, and a kit is used to prepare treatment agent composition 1 for preparing treatment liquid 1 and treatment agent composition 2 for preparing treatment liquid 2.

[0064] Specifically, an embodiment of (1) includes carrying out step 1 in which a treatment tank is filled with treatment liquid 1 and a textile product is treated with treatment liquid 1, and then carrying out step 2 in which a treatment tank is filled with treatment liquid 2 and a textile product is treated with treatment liquid 2. In step 1 and / or step 2, a mechanical force may be applied to the textile product when the textile product is treated. Step 1 and / or step 2 can be carried out in a commercially available washing machine.

[0065] In addition, an embodiment of (2) includes a pretreatment step 1 in which treatment liquid 1 is stored in a spray container and the treatment liquid 1 is sprayed onto a textile product, followed by a step 2 in which the textile product is treated with treatment liquid 2. Step 2 can be performed in a commercially available washing machine.

[0066] In addition, an embodiment of (3) includes a step 2 in which a treatment tank is filled with treatment liquid 2 and a textile product is treated with treatment liquid 2, and a post-treatment step 1 in which a textile product is treated with treatment liquid 1 is performed during rinsing in step 2. Step 1 and / or step 2 can be performed in a commercially available washing machine.

[0067] An example of the embodiment (4) is a process in which a textile product and a treatment composition containing components (a) and (b) are placed in a treatment tank, and water is poured into the treatment tank to dilute the treatment composition. That is, when the dilution of the treatment composition begins, the pH of the diluted solution of the treatment composition is less than 5, and step 1 is performed to treat the textile product with treatment liquid 1. Thereafter, by pouring in more water, the pH of the diluted solution of the treatment composition shifts to the neutral side, and the pH of the diluted solution of the treatment composition becomes less than 6, and step 2 is performed to treat the textile product with treatment liquid 2.

[0068] As a more preferred embodiment of the above (1) to (3), a step (step A) of reducing the treatment liquid 1 or treatment liquid 2 contained in the textile product obtained in step 1 or step 2 is carried out, which is preferable in terms of obtaining the effects of the present invention more effectively. As step A, a dehydration step, a drying step, or a combination thereof is preferable. The dehydration step includes a step of separating the treatment liquid 1 or the treatment liquid 2 from the textile product by centrifugal force caused by rotating the textile product containing the treatment liquid 1 or the treatment liquid 2 obtained in step 1 or step 2, or a step of separating the treatment liquid 1 or the treatment liquid 2 from the textile product by compressing the textile product containing the treatment liquid 1 or the treatment liquid 2 with a roller or the like. An example of an operation that applies centrifugal force is a dehydration operation, which is one of the functions of a washing machine for textile products. In order to further enhance the sterilization effect in step 2, the textile product obtained in the dehydration step preferably contains the treatment liquid 1 in an amount of 100% by mass or less, more preferably 80% by mass or less, even more preferably 60% by mass or less, even more preferably 40% by mass or less, and more preferably more than 20% by mass, of the weight of the textile product. The drying step is a step of reducing water from the textile product containing treatment liquid 1 or treatment liquid 2 obtained in step 1 or step 2. Specific examples of the drying step include an operation of hanging the textile product obtained in step 1 or step 2 in the air, an operation of applying heat to the textile product, an operation of blowing air onto the textile product, and combinations thereof. The textile product may be dried to the extent that a typical user does not feel any dampness when touching the textile product with their hands.

[0069] <Disinfectant composition> The present invention provides a disinfectant composition comprising component (a), component (b) and water, having a pH of less than 5, and a 333-fold diluted solution having a pH of less than 6. This disinfectant composition may be an undiluted solution of the disinfectant composition. Preferred aspects of the components (a) and (b) in the disinfectant composition of the present invention are the same as the preferred aspects of the components (a) and (b) described in the method for disinfecting textile products of the present invention. The disinfectant composition of the present invention may optionally contain the component (c) and optional components described in the disinfecting method of the present invention.

[0070] The disinfectant composition of the present invention contains component (a) in an amount of preferably 0.001% by mass or more, more preferably 0.01% by mass or more, and even more preferably 0.1% by mass or more, from the viewpoint of disinfecting performance, and preferably 20% by mass or less, more preferably 10% by mass or less, and even more preferably 5% by mass or less, from the viewpoint of disinfecting performance.

[0071] The disinfectant composition of the present invention contains component (b) in an amount of preferably 1% by mass or more, more preferably 3% by mass or more, and even more preferably 5% by mass or more from the viewpoint of disinfecting performance, and preferably 50% by mass or less, more preferably 30% by mass or less, and even more preferably 20% by mass or less from the viewpoint of disinfecting performance.

[0072] The disinfectant composition of the present invention contains component (c) in an amount of preferably 0.1% by mass or more, more preferably 0.5% by mass or more, and even more preferably 1% by mass or more, from the viewpoint of disinfecting performance, and preferably 10% by mass or less, more preferably 5% by mass or less, and even more preferably 3% by mass or less, from the viewpoint of disinfecting performance.

[0073] <Kit for manufacturing textile disinfection treatment liquid> An example of the embodiment (5) is a kit for producing a treatment solution for sterilizing textile products, which is composed of multiple agents including components selected from component (a) and component (b), in which component (a) and component (b) are contained in different agents. Preferred aspects of the components (a) and (b) in the kit for producing a treatment liquid for sterilizing textile products of the present invention are the same as the preferred aspects of the components (a) and (b) described in the method for sterilizing textile products of the present invention. In addition, in the kit for producing a treatment solution for sterilizing textile products of the present invention, the agent containing component (a) and the agent containing component (b) can optionally contain component (c) and optional components described in the sterilization method of the present invention, respectively.

[0074] Examples of kits of the present invention include: (1) A kit comprising a preparation containing component (a) and not containing component (b), and a preparation containing component (b) and not containing component (a); (2) A kit comprising an agent containing the (a) component and the (b) component, and an agent containing the (b) component; (3) The kits according to the above (1) and (2), each of which comprises the component (c); Examples include:

[0075] The kit of the present invention may be a kit composed of an agent 1 for preparing the above-mentioned treatment liquid 1, and an agent 2 for preparing the above-mentioned treatment liquid 2. Agent 1 is an agent containing component (a), and preferably further contains one or more selected from component (b) and component (c). The preferred contents of the (a), (b) and (c) components in the agent 1 are the same as the preferred contents of the (a), (b) and (c) components described in the disinfectant composition of the present invention. The preferred contents of the (b) and (c) components in the agent 2 are the same as the preferred contents of the (b) and (c) components described in the disinfectant composition of the present invention.

[0076] Another example of the kit of the present invention is a single-compartment or multi-compartment pouch for disinfecting water-soluble textile products, which contains an agent containing component (a) and an agent containing component (b), in which the agent containing component (a) dissolves first, followed by the agent containing component (b).

[0077] The method for sterilizing textile products of the present invention is used for sterilizing textile products such as clothing, towels, bedding, textile products for bedding (sheets, pillowcases, etc.), masks, etc. Other textile products that can be sterilized can also be used. The material of the textile product is not particularly limited, and examples thereof include natural fibers such as cotton, hemp, wool, and silk, synthetic fibers such as polyester and acrylic, and blends thereof, among which cotton fibers or blends of cotton fibers and other fibers are preferred.

[0078] The method for sterilizing textile products of the present invention can be used for sterilizing textile products used not only in ordinary households but also in medical and nursing care, etc. Examples of bacteria that can be targeted by the method for sterilizing textile products of the present invention include bacteria of the genus Moraxella, bacteria of the genus Micrococcus, bacteria of the genus Methylobacterium, bacteria of the genus Acinetobacter, bacteria of the genus Pseudomonas, bacteria of the genus Bacillus, bacteria of the genus Sphingomonas, bacteria of the genus Ralstonia, bacteria of the genus Cupriavidus, bacteria of the genus Psychrobacter, bacteria of the genus Pseudomonas ... Examples of the bacteria include one or more bacteria selected from the genus Psychorobacter, Serratia, Escherichia, Staphylococcus, Burkholderia, Listeria, Shigella, Vibrio, Klebsiella, Salmonella, and Enterobacter.

[0079] In the textile product sterilization method of the present invention, the bath ratio value expressed as the ratio of the mass (kg) of the textile product to the amount (liters) of treatment liquid 1 or treatment liquid 2, i.e., the amount (liters) of treatment liquid 1 or treatment liquid 2 / mass (kg) of textile product (hereinafter, this ratio may be referred to as the bath ratio), can be selected from 1 or more, 2 or more, 3 or more, 4 or more, 5 or more, and 100 or less, 50 or less, 25 or less, and 15 or less, from the viewpoint of further exerting the effects of the present invention. In the textile product sterilization method of the present invention, the bath ratio may be such that the textile products overlap with each other or that the textile products are placed in a laundry net, for example, a bath ratio of 10 or more, or a bath ratio of 15 or more. In the method for sterilizing a textile product of the present invention, the liquor ratio in step 1 and / or step 2 may be within the above-mentioned range, and from the viewpoint of further exerting the effects of the present invention, it is preferable that the liquor ratio in at least step 2, and further in steps 1 and 2, is within the above-mentioned range. The method for sterilizing a textile product of the present invention may be a method for sterilizing a textile product placed in a laundry net. EXAMPLES

[0080] Treatment liquid 1 and treatment liquid 2 containing the components shown in Tables 1 and 2 were prepared, and steps 1 and 2 of the examples and comparative examples were carried out to sterilize the textile products.

[0081] <Composition ingredients> <Component (a)> Polymer A: Sodium salt of copolymer of acrylic acid A1 and maleic acid A2 (A1:A2 (molar ratio) = 25:75), weight average molecular weight 2,000 Polymer B: acrylic acid B1-polyoxyethylene (23) allyl ether B2 copolymer (B1:B2 (molar ratio) = 25:75), weight average molecular weight 20,000 to 30,000 Polymer C: Diallyldimethylammonium chloride C1-maleic acid C2-sulfur dioxide C3 copolymer (C1:C2:C3 (molar ratio) = 0.67:0.27:0.06), weight average molecular weight 23,000 Polymer D: Sodium polyacrylate, weight average molecular weight 6,000~10,000 <(b) Component> AS: Sodium alkyl sulfate, alkyl group carbon number 12-16, manufactured by Kao Corporation LAS: Sodium linear alkylbenzene sulfonate, alkyl group carbon number 10-14, manufactured by Kao Corporation AOS: Sodium α-olefin sulfonate, olefin portion has 14 to 16 carbon atoms, manufactured by Clariant Japan Co., Ltd. <(c) component> Organic acid: Citric acid, Fujifilm Wako Pure Chemical Industries, Ltd. NaOH: Sodium hydroxide solution (0.1M), manufactured by Fujifilm Wako Pure Chemical Industries, Ltd. HCl: Hydrochloric acid (0.1M), manufactured by Fujifilm Wako Pure Chemical Industries, Ltd. <Other ingredients (ingredients used to adjust hardness)> Calcium chloride dihydrate: Fujifilm Wako Pure Chemical Industries, Ltd. Magnesium chloride hexahydrate: Fujifilm Wako Pure Chemical Industries, Ltd.

[0082] <Method for evaluating sterilization of textile products> 1. Preparation of Test Fabric A wetting liquid was prepared by dissolving 1 g of Tween 80 (MP Biomedicals, Inc.) and 1 g of sodium carbonate (FUJIFILM Wako Pure Chemical Industries, Ltd.) in 200 mL of ion-exchanged water. Next, 15 L of ion-exchanged water was heated to 100°C, and 7.5 g of wetting liquid and 7.5 g of sodium carbonate were added and stirred to prepare a pretreatment aqueous solution. Three pieces of cloth (cotton, plain weave, gold strip 2003) with a width of 0.92 m and a length of 3.5 m were cut, and the cut pieces were immersed in the pretreatment aqueous solution at 100°C for 1 hour. After immersion, the cloth was rinsed with ion-exchanged water at 100°C for 5 minutes while stirring, then dehydrated for 1 minute, and dried and smoothed out with a press. After drying, the cloth was cut into 3 cm x 3 cm pieces, autoclaved, and then dried in a thermostatic chamber (48°C) for more than 24 hours to prepare test cloth.

[0083] 2. Sterilization test for textile products (2-1) Modification treatment of test fabric (step 1) Treatment composition 1 was prepared by mixing component (a), component (b), and water in the ratio shown in Table 1 or 2. The pH of treatment composition 1 was adjusted by adding component (c) so that the pH of treatment composition 1 after dilution would be the value shown in Table 1 or 2. Treatment composition 1 was diluted with ion-exchanged water according to the respective dilution ratios to prepare treatment liquid 1 shown in Tables 1 and 2. 30 mL of treatment solution 1 was placed in a polystyrene screw bottle No. 7 (volume 75 mL, manufactured by Maruemu Co., Ltd.), and 16 pieces of the test cloth (3 cm x 3 cm) prepared in 1 above were placed in it (bath ratio = 16 L / kg). In Examples 1-19 and 1-20, one test cloth for inoculation was sandwiched between two test cloths above and below to make a stack of five, which were then fixed with clips and placed in the polystyrene screw bottle as a bundle of test cloths. The polystyrene screw bottle containing the test cloth was shaken at 110 rpm, 30 min, and room temperature (25°C) using a shaker to modify the test cloth. Next, 30 mL of ion-exchanged water was placed in another polystyrene screw bottle No. 7, and the modified test cloth was placed in the bottle. The bottle was shaken at 140 rpm, 3 min, and room temperature (25°C) using a shaker to rinse the test cloth. Between the step of modifying the test fabric and the step of rinsing the test fabric, dehydration was performed by removing excess water with tweezers. The step of modifying the test fabric and the step of rinsing the test fabric were counted as one cumulative cycle, and after performing the steps once or three cumulative cycles, the test fabric was dried and used for the sterilization treatment described below.

[0084] (2-2) Sterilization treatment of test cloth (step 2) (i) Cultivation of bacteria 100 μL of Staphylococcus aureus (NBRC12732) from a glycerol stock was spread onto SCD agar medium and cultured overnight. (ii) Preparation of test cloth for sterilization test For one sample, three test cloths for inoculation and a test cloth for adjusting the liquor ratio were prepared so that the total weight was 15 g. The corners of the test cloth for inoculation were marked in advance. (iii) Preparation of LP solution for extraction 30 mL of LP dilution solution (manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.) used for extraction in the sterilization test was dispensed into a 50 mL centrifuge tube. (iv) Preparation of bacterial solution The bacteria cultured in (i) were collected and suspended in physiological saline, and centrifuged at 5,000 rpm, 4°C, and 5 min. The supernatant was discarded, and 9 The samples were diluted with physiological saline to obtain a concentration of cfu / mL (in the case of Staphylococcus aureus, OD value = 1.5). (v) Inoculation and drying of fabric (ii) Take one piece of test cloth for inoculation marked with tweezers, add 10 μL of ion-exchanged water, 10 9 The bacteria were inoculated in the order of 20 μL of the bacterial solution of cfu / mL. After confirming that the liquid was spreading, the test cloth was placed in a petri dish, the dish was covered, and the dish was dried in a safety cabinet for about 1 to 2 hours. The same procedure was carried out for each sample using three test cloths for inoculation. (vi) Preparation of treatment solution 2 Treatment solution 2 was prepared in a PP sample storage container (volume 443 mL, manufactured by AS ONE Corporation). First, component (a), component (b) and water were mixed in the ratios shown in Table 1 or 2 to prepare treatment composition 2. Treatment composition 2 was adjusted so that the hardness of treatment composition 2 after dilution was 2° DH, and the pH of treatment composition 2 was adjusted by adding component (c) so that the pH of treatment composition 2 after dilution would be the value shown in Table 1 or 2. Finally, treatment solution 2 was adjusted to 250 mL in the PP sample storage container with ion exchanged water. (vii) Contact of textile products with treatment liquid 2 (sterilization test) (v) One of the test cloths inoculated with the bacteria was sandwiched between two other test cloths, making a stack of five, and then fixed with clips. 13.2 g of test cloth (cotton, plain weave, gold strip 2003) for adjusting the bath ratio was immersed in treatment solution 2 in a PP sample storage container (PW-05, AS ONE Corporation), and three of the five-ply inoculated test cloths prepared in (vii) were placed in the container to start contact between the test cloth and treatment solution 2. The PP sample storage container was covered and shaken at 100 rpm and 25°C for the treatment time t2 (min) shown in Table 1 or 2. After contact between the test cloth and treatment solution 2, the clip was removed, and the three marked test cloths for inoculation were taken out with tweezers and transferred to 30 mL of LP dilution solution, which was mixed using a vortex mixer to inactivate the surfactant. After inactivation of the surfactant with the LP dilution solution was completed for all samples, the bacteria were extracted by further mixing with a vortex mixer for 1 minute. This extract was serially diluted using LP dilution solution, then mixed with SCDLP agar medium and cultured for 1-2 days, the number of bacteria was counted, and the number of surviving bacteria per 1 g of inoculated test fabric (log(cfu / mass of fabric (g))) was calculated. The smaller the value of the number of surviving bacteria, the better the sterilization performance of the textile product sterilization method.

[0085] [Table 1]

[0086] [Table 2]

Claims

1. (a) Bringing a textile product into contact with a treatment solution 1 containing a polymer having a carboxyl group [hereinafter referred to as component (a)] and water, and having a pH of less than 5. After bringing the processing solution 1 into contact with the textile product, the process involves bringing the textile product into contact with processing solution 2, which contains an anionic surfactant (hereinafter referred to as component (b)) and water, and has a pH of less than 6. Methods for disinfecting textile products.

2. (a) Step 1 involves bringing a processing solution 1 containing the components and water, with a pH of less than 5, into contact with a textile product. After step 1, step 2 is performed, in which the textile product is brought into contact with a treatment solution 2 containing component (b) and water, having a pH of less than 6. A method for disinfecting textile products according to claim 1.

3. The method for disinfecting textile products according to claim 2, wherein the bath ratio in step 1 and step 2 is 1 or more and 100 or less.

4. The method for disinfecting textile products according to any one of claims 1 to 3, wherein the treatment solution 1 contains component (b).

5. A method for disinfecting a textile product according to claim 2 or 3, further comprising the step of drying the textile product obtained in step 1 or step 2.