TW202237937A - Method for cleaning textile product - Google Patents

Abstract

The present invention provides a method for cleaning a textile product, said method comprising: a step for obtaining a composition that has a pH of 9.5 or more by mixing water, (a) an oxygen-based bleaching agent, and (b) a bleach activator which reacts with active oxygen and generates an organic peracid having from 1 to 11 carbon atoms, with each other; a step for adjusting the composition having a pH of 9.5 or more so that the pH is from 5.5 to 9.0; and a step for bringing a textile product into contact with the composition, which has been adjusted to have a pH of from 5.5 to 9.0, while having the composition contain (c) an enzyme and (d) a surfactant.

Description

Cleaning method of fiber products

The invention relates to a method for cleaning fiber products and a method for sterilizing fiber products.

In recent years, in order to respond to the improvement of consumers' hygiene awareness, sterilization and sterilization performance are required when washing clothes. In order to sterilize and sterilize clothes, bleaches, bleach activators, surfactants, etc. are used (for example, JP-A-2001-72997).

Japanese Patent Laid-Open No. 2001-72997 discloses a bactericidal detergent composition, which contains inorganic peroxide (a), tetraacetylethylenediamine (b), and protease (c). Japanese Patent Application Laid-Open No. 2009-185424 discloses a cleaning method for fiber products, which generates an organic peracid from a bleach activator represented by the general formula R-C(=O)-LG, at a pH of 6 to 8.5 In the treatment liquid, the organic peracid is allowed to act on the fiber product. Japanese Patent Application Laid-Open No. 2001-11488 discloses a bleach cleaning agent, which contains a bleach activator (a) with a specific structure, a specific nonionic surfactant (b), a hydrogen peroxide-releasing substance (B), and alkali metal silicates (C). Japanese Patent Publication No. 2004-535487 discloses an automatic washing or tableware cleaning product, which includes an enzyme cleaning area (primary cleaning area), a bleaching area (secondary cleaning area), and a final processing area.

When an enzyme and a bleaching agent are used together, there exists a possibility that enzyme activity may be impaired by a bleaching agent.

The present invention provides a novel method for cleaning fiber products and a method for sterilizing fiber products. The method effectively exhibits enzyme activity, and the fiber products have excellent sterilization and degerming properties.

The present invention relates to a cleaning method for fiber products, which comprises the following steps: mixing (a) an oxygen-based bleaching agent [hereinafter referred to as (a) component], (b) reacting with active oxygen to generate a carbon number of 1 to 11 The following step of obtaining a composition having a pH value of 9.5 or higher with the following organic peracid bleach activator [hereinafter referred to as (b) component] and water; A step of adjusting the pH value of the above-mentioned composition having a pH value of 9.5 or higher to 5.5 to 9.0; and The above-mentioned composition adjusted to a pH of 5.5 to 9.0 contains (c) an enzyme [hereinafter referred to as (c) component] and (d) a surfactant [hereinafter referred to as (d) component] and The step of contacting fiber products.

Also, the present invention relates to a method for sterilizing fiber products, which comprises the steps of: mixing (a) an oxygen-based bleaching agent [hereinafter referred to as (a) component], (b) reacting with active oxygen to generate carbon number 1 A step of obtaining a composition having a pH value of 9.5 or higher by the above 11 or less organic peracid bleach activator [hereinafter referred to as (b) component], and water; A step of adjusting the pH value of the above-mentioned composition having a pH value of 9.5 or higher to 5.5 to 9.0; and The above-mentioned composition adjusted to a pH of 5.5 to 9.0 contains (c) an enzyme [hereinafter referred to as (c) component] and (d) a surfactant [hereinafter referred to as (d) component] and The step of contacting fiber products.

According to the present invention, a novel method for cleaning fiber products and a method for sterilizing fiber products is provided, the method effectively exhibits enzyme activity, and the fiber products have excellent sterilization and sterilization performance. This effect of the present invention can also be brought into full play when the processing condition is a low liquor ratio.

The inventors of the present invention have studied the best cleaning method using organic peracids, and found that by producing organic peracids with a specified carbon chain length from the bleach activator under conditions above the specified pH value, the organic peracids containing the organic peracids will be contained. The pH value of the peracid composition is adjusted to a specified value, and the composition is brought into contact with fiber products in a state where the composition contains enzymes and specified surfactants, so that the enzyme activity can be effectively exhibited, and the fiber products can be sterilized , Improved sterilization performance. It is speculated that the reaction of generating organic peracids from the bleach activator is promoted by making the pH of the composition when organic peracids are generated to be 9.5 or more, and then adjusting the pH to 5.5 to 9.0 and contacting with fiber products, thereby Effectively exhibit enzyme activity, improve the sterilization and sterilization performance of fiber products. It is also speculated that by contacting the above-mentioned composition with the fiber product after the pH value is adjusted to 5.5 to 9.0, the damage to the enzyme activity due to the bleaching agent is reduced, the enzyme activity is more effectively expressed, and the The bactericidal and sterilizing performance of acid-based organic peracids is improved. Also, along with the enlargement of the washing machine and the increasing attention to water saving, the cleaning (insert cleaning) under the low bath ratio is constantly increasing. During the cleaning process of fiber products with a low bath ratio (for example, bath ratio below 25), the base agent is adsorbed on the fiber products or stains and reacts, so that the effective concentration of the bactericidal component in the cleaning solution decreases, and there is no sufficient effect Concerns about bacteria. Therefore, in the method for cleaning and sterilizing fiber products of the present invention, by using a bleach activator that generates an organic peracid with a short alkyl chain, hydrophilicity, difficulty in absorbing to fibers, and a carbon number of 1 to 11, even In a low bath ratio environment, it can still exert high enzyme activity and excellent bactericidal performance of fiber products. It is speculated that the reason is that the length of the alkyl chain of the organic peracid or the dissociation state of the carboxyl group is one of the performance factors, which affects the adsorption of the cleaning solution to fibers or stains. At first glance, the higher the hydrophobicity of the organic peracid generated from the bleach activator, the easier it is to adsorb on the fiber and the more effective it is on the bacteria. Therefore, from this point of view, it is considered that the organic peracid with higher hydrophilicity The bleach activators of component (a) of the present invention are less favorable. However, organic peracids generated from the bleach activators of the present invention are adsorbed to fibers in lesser amounts and correspondingly more present in cleaning solutions. Also, since the bacteria are not evenly distributed on the fiber products, but are, for example, laminated or scattered on the fiber products, it is considered that the excess adsorption of organic peracids on the fiber products will reduce the probability of contact with the bacteria on the fiber products. Furthermore, it is known that in the cleaning step, the bacteria dissociated into the cleaning solution from the contaminated fiber products, washing tanks, cleaning buckets, etc. will spread to the fiber products, and it is also necessary to sterilize the bacteria in the cleaning solution. Therefore, the organic peracid generated from component (a) has a higher probability of contacting bacteria in the cleaning solution than organic peracids with higher hydrophobicity. As a result, in the present invention, the organic peracid effectively acts on bacteria in the cleaning process, and the performance of bacteria or the performance of removing bacteria is considered to be improved. If the bath ratio becomes lower, the amount of cleaning solution contacted with respect to the amount of fiber products becomes smaller, so the effect of the present invention is more obvious.

The cleaning method of the fiber product of the present invention carries out the following steps: mixing (a) an oxygen-based bleach [hereinafter referred to as (a) component], (b) reacting with active oxygen to generate an organic bleach with a carbon number of 1 or more and 11 or less; A step of obtaining a composition having a pH value of 9.5 or higher by an acid bleach activator [hereinafter referred to as (b) component], and water; A step of adjusting the pH value of the above-mentioned composition having a pH value of 9.5 or higher to 5.5 to 9.0; and The above-mentioned composition adjusted to a pH of 5.5 to 9.0 contains (c) an enzyme [hereinafter referred to as (c) component] and (d) a surfactant [hereinafter referred to as (d) component] and The step of contacting fiber products.

First, (a) component - (d) component used for the cleaning method of the fiber product of this invention is demonstrated.

(a) The component is an oxygen type bleaching agent. The component (a) is a substance that generates HO ₂ ^- in water. That is, as (a) component, the compound which can generate|occur|produce the component (for example, active oxygen) which reacts with (b) component and produces an organic peracid can be mentioned, and these (a) components can use 1 type or 2 or more types. . As (a) component, an inorganic peracid is mentioned, for example. As an inorganic peracid, hydrogen peroxide or what releases hydrogen peroxide is mentioned, for example. As a substance which releases hydrogen peroxide, percarbonate, perborate, superphosphate, persilicate etc. are mentioned, for example. From the perspective of improving the sterilization and sterilization performance of fiber products, the component (a) is preferably at least one selected from percarbonate and perborate, more preferably selected from sodium percarbonate and sodium perborate At least one of them, more preferably sodium percarbonate. The substance releasing hydrogen peroxide can be powder or powder.

The component (b) is a bleach activator that reacts with active oxygen to produce an organic peracid having 1 or more carbon atoms, furthermore, 2 or more carbon atoms and 11 or less carbon atoms. From the viewpoint of improving the bactericidal and sterilizing properties of fiber products, the component (b) is preferably at least one selected from tetraacetylethylenediamine and compounds represented by the following general formula (b-1) Bleach activators. R ¹ -C(=O)-LG (b-1) (In the formula, based on the point of view of improving the sterilization and sterilization performance under low bath ratio, R ¹ is an alkyl group with a carbon number of 1 to 10, and LG system out of base).

In the formula (b-1), the carbon number of R1 is preferably ¹ or more, more preferably 2 or more, based on the viewpoint of bactericidal and sterilizing performance, and based on the sterilizing and sterilizing properties under low liquor ratio conditions. From the viewpoint of improving bacterial performance, it is preferably 10 or less, more preferably 9 or less.

In formula (b-1), LG is a leaving group, and specifically, the following groups can be mentioned.

[chemical 1]

For example: -OR ² -(O) _p -COO ^- , -OR ² -(O) _p -COOM, -OR ² -(O) _p -SO ₃ ^- and -OR ² -(O) _p -SO ₃ M (here, R ² represents an alkylene group, p represents 0 or 1, and M represents a hydrogen atom, an alkali metal or an alkaline earth metal (1/2 atom)), based on the viewpoint of bactericidal and bactericidal performance, more It is preferably any one of the following bases. Furthermore, from the standpoint of improving the bactericidal and sterilizing performance, the alkylene group of R2 is preferably from ¹ to 6 in carbon number.

[Chem 2]

The component (b) can be obtained by esterifying an acid anhydride or an acid halide of a fatty acid having an alkyl group corresponding to the above R ¹ with p-hydroxybenzoic acid, salicylic acid, or p-hydroxybenzenesulfonate. When the acid anhydride or acid halide of fatty acid is used to carry out the esterification reaction with p-hydroxybenzoic acid or salicylic acid, p-hydroxybenzoic acid or salicylic acid can be generated and then condensed, which is obtained by the general formula (b-2) Indicates many adducts.

[Chem 3]

(In the formula, ^R3 has the same meaning as the above ^- mentioned R1, M is a hydrogen atom, an alkali metal or an alkaline earth metal (1/2 atom), and n represents a number between 2 and 5).

Regarding the compound of the general formula (b-2), it reacts with hydrogen peroxide in a cleaning bath or a sterilizing (sterilizing) bath to generate an organic peracid represented by R ³ -COOOH, not only that but also the following formula :

[chemical 4]

The represented hydroxybenzene percarboxylic acid can obtain a very high bactericidal effect, so it is more suitable to be present in the composition in contact with fiber products. Furthermore, from the viewpoint of improving the sterilization and sterilization performance of fiber products, the amount of the compound of general formula (b-2) relative to the compound of general formula (b-1) is preferably 0.1% by mass or more, more preferably It is 1 mass % or more, and, Preferably it is 50 mass % or less, More preferably, it is 30 mass % or less, More preferably, it is 15 mass % or less.

The salt of the bleach activator is preferably a sodium salt, potassium salt, or magnesium salt from the viewpoint of improving the sterilization and sterilization performance of fiber products, and a sodium salt is particularly preferable from the viewpoint of solubility.

Specific examples of preferred bleach activators include one or more compounds selected from the following (b-3) to (b-8), based on the viewpoint of improving the bactericidal and sterilizing properties of fiber products , more preferably one or more compounds selected from (b-4), (b-5), (b-7) and (b-8).

[chemical 5]

[chemical 6]

(c) The component is an enzyme. Based on the viewpoint of improving the sterilization and sterilization performance of fiber products, the (c) component is, for example, preferably selected from the group consisting of protease, peptidase, amylase, lipase, isoamylase, polytriglucose, mannitol decomposing enzyme, One or more enzymes of nuclease, oxidase, peroxidase, etc.

(d) The component is a surfactant. From the viewpoint of improving the bactericidal and sterilizing performance of fiber products, (d) component can use at least one selected from cationic surfactants, anionic surfactants, nonionic surfactants, and amphoteric surfactants. Surfactant.

Examples of the nonionic surfactant as component (d) include polyoxyalkylene alkyl ethers, polyoxyalkylene alkenyl ethers, polyoxyalkylene alkylphenyl ethers, and alkyl polyglycosides. , sorbitan fatty acid ester, polyoxyalkylene sorbitan fatty acid ester, polyoxyalkylene glycol fatty acid ester, oxyethylene oxypropylene block polymer (Pluronic (registered trademark)), fatty acid monoglyceride Esters, and amine oxides, etc.

From the perspective of improving the sterilization and sterilization performance of fiber products, the anionic surfactant of component (d) is preferably selected from soap, alkyl or alkenyl benzene sulfonate, polyoxyalkylene alkyl or alkenyl One or more of ether sulfates, alkyl or alkenyl sulfates, alkane sulfonates, and sulfosuccinic acid diester salts. As more specific anionic surfactants, for example: alkyl or alkenyl benzene sulfonate having an alkyl or alkenyl group having 10 to 18 carbons, and an alkyl or alkenyl group having 10 to 18 carbons Polyoxyalkylene alkyl or alkenyl ether sulfate salts, alkyl or alkenyl sulfate ester salts of alkyl or alkenyl groups with a carbon number of 10 to 18, α-olefin sulfonates (with a carbon number of 10 or more 18 or less), α-sulfo fatty acid salt (10 to 18 carbons), α-sulfo fatty acid (10 to 18 carbons) lower alkyl (1 to 5 carbons) ester salt, internal olefin sulfonic acid Salt (10 to 24 carbons), alkyl or alkenyl sulfonate (10 to 18 carbons). In addition, as counter ions, there may be mentioned: alkali metals, alkaline earth metals (1/2 atoms), ammonia, alkanolamines, etc., and from the viewpoint of improving the sterilization and sterilization performance of fiber products, alkali metals are preferred . One component may be used, or a plurality of components may be used in combination.

In the present invention, from the standpoint of cleaning performance, enzyme decomposition of stains, improvement of removal performance, sterilization of fiber products, and improvement of sterilization performance, it is preferable that the carbon number of the alkyl group is 10 to 14 and ethylene oxide Polyoxyethylene alkyl sulfate salts with an average added mole number of 1 to 3, and alkylbenzenesulfonate, alkyl or alkenyl sulfate salts with alkyl carbon numbers of 11 to 15 (carbon number 10 to 18), particularly preferably polyoxyethylene alkyl sulfate with an alkyl carbon number of 10 to 14 and an average addition molar number of ethylene oxide of 1 to 3, and an alkyl carbon number of 11 Alkyl benzene sulfonate with the above 15 or less.

Regarding (d) component, as a cationic surfactant, for example: mono- or dialkylamine and its polyoxyethylene adduct, mono- or di-long-chain alkyl quaternary ammonium salt, etc., as an amphoteric surfactant, Examples thereof include carbonyl betaine, sultaine, and hydroxysultaine.

From the viewpoint of cleaning performance and improving the sterilization and sterilization performance of fiber products, component (d) is preferably one or more surfactants selected from anionic surfactants and nonionic surfactants. An anionic surfactant is more preferable from the standpoint of promoting the decomposition and removal of stains, the sterilization of fiber products, and the improvement of sterilization performance.

Next, the cleaning method of the fiber product of the present invention will be described, but the cleaning method of the present invention is not limited to the following method. Moreover, the process of adjusting the pH of each composition can use a well-known pH adjustment method suitably.

As the cleaning method of the fiber product of the present invention, for example, the following method can be exemplified: as step 1, mix (a) component, (b) component, and water, make the pH value of the composition obtained by mixing maintained at 9.5 or more and forcibly After the organic peracid is generated, or at the same time as the organic peracid is generated, step 2 is carried out. As this step 2, the pH value of the composition with a pH value of 9.5 or higher is lowered to 5.5 to 9.0 using a pH adjuster, and the In this composition, an organic peracid is allowed to act on a fiber product. When treating fiber products, the composition whose pH value is adjusted to 5.5 to 9.0 may also be diluted with water if necessary. Furthermore, the fiber product can be put into the composition at any of the following timings: simultaneously with step 1, before and after step 1, simultaneously with step 2, and before and after step 2.

Component (c) and component (d) can be blended into the composition in contact with fiber products (i.e. the treatment solution for fiber products, the same below) at any of the following timings: at the same time as step 1, before and after step 1, and at the same time as step 2 , before and after step 2.

Component (c) is preferably formulated into the composition contacting the fiber product during step 1 from the viewpoint of enzyme activity and improvement of bactericidal and sterilizing performance under low bath ratio conditions. Component (d) is preferably mixed into the composition in contact with the fiber product during step 1 from the viewpoint of cleaning performance and improvement of sterilization and sterilization performance under low liquor ratio conditions.

＜Step 1＞ First, the (a) component, (b) component, and water are mixed to produce an organic peracid with a predetermined carbon chain length. In step 1, the pH of the composition obtained by mixing component (a), component (b), and water is adjusted from the viewpoint of efficiently generating organic peracids and improving the sterilization and sterilization performance of fiber products. It is more than 9.5, preferably more than 9.8, more preferably more than 10.0, and, based on the viewpoint of preventing organic peracid hydrolysis and improving the sterilization and sterilization performance of fiber products, the pH value of the composition is maintained at preferably 12.0 or less, more preferably 11.5 or less, still more preferably 11.0 or less. In order to maintain such a pH, an alkaline agent can be used, and specifically, inorganic bases such as sodium hydroxide, potassium hydroxide, and carbonates such as sodium carbonate are preferably used. The pH value of the composition is the pH value at the temperature of the composition in step 1, and may also be the pH value at 25°C.

In step 1, the time for maintaining the pH value of the composition at 9.5 or more is preferably more than 5 seconds, more preferably 10 seconds, based on the viewpoint of generating organic peracids and improving the sterilization and sterilization performance of fiber products. Seconds or more, more preferably 30 seconds or more, and from the viewpoint of cleaning, sterilization, and sterilization time in the automatic cleaning cycle, preferably 15 minutes or less, more preferably 10 minutes or less, and even more preferably less than 5 minutes.

From the standpoint of taking into account the rapid generation of organic peracids and the stability of the generated peracids, the concentration in terms of hydrogen peroxide in the above composition in Step 1 is preferably 0.01% by mass or more, more preferably 0.05% by mass % or more, more preferably 0.1 mass % or more, and, preferably 20 mass % or less, more preferably 10 mass % or less, further preferably 5 mass % or less.

The compounding amount of the (b) component in the above-mentioned composition in Step 1 is preferably 0.2 ppm (mass ratio, the same below) or more, and more preferably 1 ppm or more, more preferably 10 ppm or more, and from the viewpoint of dissolving and remaining of the agent, preventing the fading of clothes, preventing damage to the base of fibers and washing machines, preferably less than 500 ppm, more preferably less than 400 ppm , and further preferably 300 ppm or less, further preferably 200 ppm or less, further preferably 100 ppm or less, further preferably 50 ppm or less.

In step 1, regarding the mass ratio (a)/(b) of (a) component mixed with water and (b) component, based on the viewpoint of improving the generation rate of organic peracid and improving the sterilization and sterilization performance of fiber products In other words, it is preferably 0.5 or more, more preferably 1 or more, and more preferably 1.5 or more, and based on the viewpoint of effectively utilizing (b) component, preventing dissolution residue, and improving the sterilization and sterilization performance of fiber products , preferably 100 or less, more preferably 80 or less, still more preferably 60 or less, still more preferably 50 or less, still more preferably 40 or less.

＜Step 2＞ In step 2, the pH of the composition having a pH of 9.5 or more obtained in step 1 is adjusted to 5.5 to 9.0 using a pH adjuster. In step 2, the pH value of the composition is adjusted to 5.5 or more, preferably 6 or more, more preferably 6.5 or more from the viewpoint of cleaning performance for various stains, and based on the expression of enzyme activity, improvement From the viewpoint of the sterilization and sterilization performance of fiber products, it is adjusted to be 9.0 or less, preferably 8.9 or less, more preferably 8.8 or less. The pH value of the composition is the pH value at the temperature of the composition in step 2, and may also be the pH value at 25°C.

In order to adjust this pH value, based on the viewpoint of improving the sterilization and sterilization performance of fiber products, pH value regulators (including buffers) can be used. Specifically, mineral acids such as sulfuric acid or phosphoric acid or their or salts of organic acids or the like. As the organic acid, it is preferable to use an organic acid such as citric acid, succinic acid, malic acid, tartaric acid, fumaric acid, or lactic acid, or a salt thereof, from the viewpoint of improving the sterilization and sterilization performance of fiber products. As the inorganic acid, from the viewpoint of improving the sterilization and sterilization performance of fiber products, it is preferably a compound having a buffering effect at a pH value of 6 to 8.5, and is particularly preferably 1 selected from boric acid, phosphoric acid, and carbonic acid. More than one kind of inorganic acids and their salts. Examples of salts of organic acids and inorganic acids include alkali metals, alkaline earth metals (1/2 atoms), ammonia, alkanolamines, and the like.

Then, the composition whose pH was adjusted to 5.5 to 9.0 in step 2 is brought into contact with the fiber product in a state containing (c) component and (d) component.

The content of component (c) in the composition in contact with fiber products is preferably 0.01 ppm (mass ratio, the same below) or more from the viewpoint of enzyme activity, sterilization of fiber products, and improvement of sterilization performance. More preferably at least 0.1 ppm, still more preferably at least 0.5 ppm, still more preferably at least 1 ppm, and, from the viewpoint of cleaning costs, preferably at most 100 ppm, more preferably at most 50 ppm, still more preferably 30 ppm or less, more preferably 10 ppm or less. In addition, in this invention, the value measured by Protein Assay Rapid Wako (manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.) was used for the enzyme protein amount of (c) component.

From the perspective of improving the decomposition and removal performance of stains, and improving the sterilization and sterilization performance of fiber products, the content of component (d) in the composition in contact with fiber products is preferably 50 ppm or more, more preferably 80 ppm Above, more preferably at least 100 ppm, more preferably at least 200 ppm, even more preferably at least 500 ppm, even more preferably at least 700 ppm, and, preferably at most 4000 ppm, more preferably at most 3000 ppm, Furthermore, it is more preferably 2000 ppm or less, and still more preferably 1000 ppm or less.

Based on the viewpoint of improving the sterilization and sterilization performance of fiber products, in the composition in contact with fiber products, the concentration of the organic peracid in the composition after adjusting the pH value in step 2 is more than 1 μmol/L, which is higher than Preferably at least 3 μmol/L, more preferably at least 5 μmol/L, still more preferably at least 10 μmol/L, still more preferably at least 20 μmol/L. Also, from the perspective of reducing the dissolved residue of the agent, preventing the fading of the clothes, and preventing damage to the substrate of the fiber and the washing machine, the concentration of the organic peracid is preferably 3500 μmol/L or less, more preferably 3000 μmol/L or less, Further preferably, it is 2500 μmol/L or less, still more preferably 1500 μmol/L or less, still more preferably 1000 μmol/L or less, still more preferably 750 μmol/L or less. At the beginning of step 2, that is, when the pH-adjusted composition to be in contact with the fiber product starts to contact the fiber product, as long as the organic acid is at the above concentration, it can be used under conditions equivalent to general immersion cleaning or washing machine cleaning. Under the condition of sufficient enzyme activity expression effect and excellent bactericidal effect.

＜Measurement of organic peracid concentration＞ The organic peracid concentration can be determined by iodometry. For example, 10 mL of the above-mentioned composition is collected as a measurement sample liquid, and 1 mL of a 1.5% catalase aqueous solution is added thereto and stirred. Thereafter, 10 mL of 20% by mass sulfuric acid and 10 mL of 10% by mass potassium iodide aqueous solution were added thereto, and then titrated with 0.01 mol/L sodium thiosulfate until it became colorless, so that the organic compounds in the composition could be determined. acid concentration. Organic peracid production amount (μmol/L) = {0.01 × titration (mL) ÷ 1000 ÷ 2} ÷ (10 ÷ 1000) × 1000 × 1000

In addition, the temperature in the composition in contact with the fiber product is preferably high temperature, specifically, preferably 0°C or higher, and more preferably Preferably it is 5°C or higher, more preferably 10°C or higher, still more preferably 20°C or higher and 60°C or lower, still more preferably 25°C or higher and 50°C or lower, still more preferably 30°C or higher and 40°C or lower.

In the cleaning method of the fiber product of the present invention, based on the viewpoint of improving the sterilization and sterilization performance of the fiber product, the ratio of the bath ratio represented by the ratio of the mass (kg) of the fiber product to the amount (liter) of the cleaning solution is Value, that is, the amount of cleaning solution (liter) / mass of fiber products (kg) (hereinafter, the ratio is sometimes referred to as bath ratio) value can be from 2 or more, 3 or more, 4 or more, 5 or more and 100 or less, 50 Choose from less than, 25 or less, and 15 or less. In the cleaning method of the fiber product of the present invention, the bath ratio that is generally considered to reduce the above-mentioned bactericidal performance may also be used, for example, a bath ratio of 25 or less, or a bath ratio of 15 or less.

In the cleaning method of the fiber product of the present invention, the time for cleaning the fiber product is preferably 1 minute or more, more preferably 2 minutes or more, and still more preferably It is 3 minutes or more, and from the viewpoint of maintaining enzyme activity, it is preferably 5 hours or less, more preferably 3 hours or less, further preferably 1 hour or less, and still more preferably 30 minutes or less.

The cleaning method of the fiber product of the present invention is also suitable for the rotary cleaning method. The rotary cleaning method refers to the cleaning method in which the fiber products that are not fixed by the rotary machine rotate around the rotation axis together with the cleaning solution. The spin cleaning method can be implemented by a spin washing machine. Specifically, as a spin-type washing machine, a drum-type washing machine, a pulsator-type washing machine, or an agitator-type washing machine may be mentioned. These spin-type washing machines can use commercially available washing machines for household use or industrial use, respectively. From the viewpoint of further reducing the amount of water used in one washing process, drum-type washing machines have been rapidly popularized in recent years. Front-loading washing machines are especially capable of reducing the amount of water used for cleaning.

[other ingredients] In this invention, the composition which contacts a fiber product may contain a solvent as (e) component. As the component (e), for example, alcohols such as ethanol, propanol, and butanol; diols such as ethylene glycol, propylene glycol, 1,3-propanediol, butanediol, diethylene glycol, and triethylene glycol; Polyalkylene glycol monoalkyl or aryl ethers such as diethylene glycol butyl ether and triethylene glycol phenyl ether. Among these, ethanol or propylene glycol is preferred from the viewpoint of improving the sterilization and sterilization performance of fiber products.

In addition, optional components such as fragrance, inorganic auxiliary agent, anti-recontamination agent, dispersant, fluorescent paint, antioxidant, pigment, antibacterial agent, preservative, antifoaming agent, polymer, etc. can be used in the present invention.

The method for cleaning fiber products of the present invention can be applied to various fibers such as natural fibers, synthetic fibers, and semi-synthetic fibers. Furthermore, the cleaning method of the fiber product of this invention can make object the fiber product containing these fibers.

The fibers may be either hydrophobic fibers or hydrophilic fibers. From the viewpoint of improving sterilization and sterilization performance, hydrophobic fibers are more preferable. Examples of hydrophobic fibers include protein-based fibers (milk protein casein fibers, Promix, etc.), polyamide-based fibers (nylon, etc.), polyester-based fibers (polyester, etc.), polyacrylonitrile-based fibers (acrylic etc.), polyvinyl alcohol-based fibers (vinylon, etc.), polyvinyl chloride-based fibers (polyvinyl chloride, etc.), polyvinylidene chloride-based fibers (vinylene, etc.), polyolefin-based fibers (polyethylene, polypropylene, etc. ), polyurethane fiber (polyurethane, etc.), polyvinyl chloride/polyvinyl alcohol copolymer fiber (polyvinyl chloride fiber (Polychlal), etc.), polyparaben Ester fibers (benzoate, etc.), polyvinyl fluoride fibers (polytetrafluoroethylene, etc.), etc. As the hydrophilic fiber, for example, seed hair fiber (cotton yarn, kapok, etc.), bast fiber (hemp, flax, ramie, hemp, jute, etc.), leaf vein fiber (Abaca hemp, agarose, etc.), coconut fiber, Rush, straw, animal hair fiber (wool, mohair, cashmere goat hair, camel hair, alpaca hair, vicuna hair, angora rabbit hair, etc.), silk fiber (domestic silk, wild silk), feather, cellulose fiber (rayon, high wet modulus viscose fiber, cuprorayon, acetic acid, etc.) etc. The fibers are preferably fibers containing cotton fibers. From the standpoint of improving the sterilization and sterilization performance, the content of the cotton fiber in the fiber is preferably at least 5% by mass, more preferably at least 10% by mass, further preferably at least 15% by mass, and even more preferably at least 20% by mass % or more, and more preferably 100% by mass. In the present invention, the so-called fiber products include fabrics such as woven fabrics, knitted fabrics, and nonwoven fabrics using the above-mentioned hydrophobic fibers or hydrophilic fibers, and underwear, T-shirts, shirts, blouses, and pants obtained by using the fabrics. , quilts, hats, handkerchiefs, towels, knitted fabrics, socks, underwear, leggings, masks and other products. From the point of view that it is easier to actually experience the effect of improving the sterilization and sterilization performance of the fiber treated with the fiber treatment composition of the present invention, the fiber product is preferably a fiber product containing cotton fiber. A preferred aspect of the content of the cotton fiber in the fiber product is the same as the content of the cotton fiber in the above-mentioned fibers.

The present invention provides a method for sterilizing fiber products, which comprises the following steps: mixing (a) component, (b) component, and water to obtain a composition with a pH value of 9.5 or higher; mixing the above-mentioned composition with a pH value of 9.5 or higher The step of adjusting the pH value to 5.5 to 9.0; and the step of contacting the above-mentioned composition having a pH value of 5.5 to 9.0 in a state containing (c) component and (d) component with a fiber product. The sterilization method of the present invention can perform sterilization or sterilization, or both sterilization and sterilization. Specific examples or preferred aspects of components (a) to (e) in the method for sterilizing fiber products of the present invention are the same as the method for cleaning fiber products of the present invention. In addition, the preferred methods, preferred treatment conditions, and preferred aspects of each component described in the cleaning method of the fiber products of the present invention are also the same as the sterilization methods of the fiber products of the present invention.

Water with hardness can be used as the water used in the cleaning method and the sterilization method of the fiber product of the present invention. According to the German hardness scale, the hardness of water is preferably above 1°dH, more preferably above 2°dH, further preferably above 3.5°dH, further preferably above 5°dH, and even more preferably above 7°dH , and, preferably 20°dH or less, more preferably 18°dH or less, further preferably 15°dH or less. Here, the German hardness (°dH) in this specification refers to the concentration of calcium and magnesium in water, converted to CaCO ₃ concentration, 1 mg/L (ppm) = about 0.056°dH (1°dH = 17.8 ppm )express. The concentrations of calcium and magnesium for the German scale were determined by chelate titration using disodium salt of ethylenediaminetetraacetic acid. The specific measurement method of the German hardness of water in this specification is as follows.

＜Determination method of German hardness of water＞ [Reagent] ・0.01 mol/L EDTA-2Na solution: 0.01 mol/L aqueous solution of disodium ethylenediaminetetraacetate (for titration, 0.01 M EDTA-Na2, manufactured by SIGMA-ALDRICH) ・Universal BT indicator (product name: Universal BT, manufactured by Tongjin Chemical Research Institute Co., Ltd.) ・Ammonia buffer solution for hardness measurement (a solution obtained by dissolving 67.5 g of ammonium chloride in 570 mL of 28 w/v% ammonia water and making the total amount 1000 mL with ion-exchanged water) [Measurement of Hardness] (1) Use a full pipette to collect 20 mL of water as a sample into a conical beaker. (2) Add 2 mL of ammonia buffer solution for hardness measurement to it. (3) 0.5 mL of Universal BT indicator was added thereto. Confirm that the solution after addition is purple. (4) While fully shaking the conical beaker, add 0.01 mol/L EDTA-2Na solution dropwise from the burette, and take the point when the sample water turns blue as the end point of the titration. (5) Total hardness was calculated|required by the following calculation formula. Hardness (°dH) = T×0.01×F×56.0774×100/A T: Titration of 0.01 mol/L EDTA-2Na solution (mL) A: Sample volume (20 mL, the volume of water used as a sample) F: factor of 0.01 mol/L EDTA-2Na solution

Example <Example 1 and Comparative Example 1> (1) Deployment ingredients The components used in Example 1 (Examples 1-1 to 1-7) and Comparative Example 1 (Comparative Examples 1-1 to 1-5) are as follows. (a') component and (b') component are comparative components of (a) component or (b) component, respectively. [(a) ingredient] Sodium percarbonate (PC-P, manufactured by Hodogaya Chemical Co., Ltd.) [(a') ingredient] Sodium carbonate (manufactured by Tokuyama Co., Ltd.) [(b) ingredient] (b1): TAED, tetraacetylethylenediamine (manufactured by Azelis Japan Co., Ltd.) (b2): NOBS, nonyloxybenzenesulfonic acid sodium salt (manufactured by Future Fuel Chemical Co., Ltd.) [(b') component] (b'1): LOBS, sodium lauryloxybenzenesulfonate (manufactured by Nitto Chemical Industry Co., Ltd.) [(c) ingredient] Protease (Savinase 16L, Novozymes) [(d) ingredient] AES: sodium alkyl ether sulfate (EMAL 20C, manufactured by Kao Co., Ltd.) [other ingredients] Citric acid (manufactured by Fuso Chemical Co., Ltd.) Succinic acid (manufactured by Nippon Shokubai Co., Ltd.) Phosphate buffer (manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.) Distilled water (manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.)

(2) Preparation of treatment liquid (cleaning liquid) The following steps 1 and 2 were carried out to prepare the treatment liquids of Examples 1-1 to 1-7 shown in Table 1 and the treatment liquids of Comparative Examples 1-1 to 1-5.

＜Step 1＞ In Examples 1-1 to 1-4, 1-6 and Comparative Examples 1-2 to 1-4, 1250 ppm of (a) component, 25 ppm of (b1) component, ( 1.875 ppm of component c) and 1250 ppm of component (d) were stirred at 600 rpm for 3 minutes using a magnetic stirrer. In Example 1-5, instead of (b1) component, 40 ppm of (b2) component was used, and in Comparative Example 1-5, 50 ppm of (b'1) component was used instead of (b1) component. In Examples 1-7, it prepared by the method similar to Example 2 except not adding (c) component. In Comparative Example 1-1, instead of (a) component, 625 ppm of sodium carbonate which is (a') component was used.

＜Step 2＞ To 80 mL of each aqueous solution prepared in <Step 1>, add citric acid, succinic acid, or phosphate buffer whose concentration was adjusted so that the pH value of the treatment solution after pH adjustment became the pH value shown in Table 1 solution 20 mL, and adjust the pH value of each treatment solution as shown in Table 1. In Examples 1-7, 1.5 ppm of component (c) was added at this time. The pH value of each treatment solution was measured before and after pH adjustment.

(3) Determination method of pH value A composite electrode for pH measurement (manufactured by HORIBA, glass-frosted sleeve type) was connected to a pH meter (manufactured by HORIBA, LAQUA F-72), and the power was turned on. A saturated potassium chloride aqueous solution (3.33 mol/L) was used as the internal solution of the pH electrode. Then, fill the 100 mL beaker with a standard solution of pH 4.01 (phthalate standard solution), a pH value of 6.86 (neutral phosphate standard solution), and a pH value of 9.18 (borate standard solution), Immerse in a constant temperature bath at 25°C for 30 minutes. Immerse the electrode for pH value measurement in the standard solution adjusted to constant temperature for 3 minutes, and perform the calibration operation in the order of pH value 6.86→pH value 9.18→pH value 4.01. The sample to be measured was adjusted to 25°C, and the electrode of the above-mentioned pH meter was immersed in the sample, and the pH value was measured 1 minute later.

(4) Bactericidal test using test solution after contact with fiber products Escherichia coli (Escherichia coli) was smeared on SCD agar medium (manufactured by Nippon Pharmaceutical Co., Ltd.), and pre-cultured at 37° C. for 16 hours. Scrape the cultured colony with a disposable inoculation loop, suspend it in sterilized distilled water, and prepare a bacterial solution of 1.0×10 ⁹ CFU/mL. Put 10 g (bath ratio 10) of sterilized cotton knitted white cloth (purchased from Gutou Store) into 100 mL of each treatment solution prepared in <Step 2> in Table 1, and use a shaker (STRONG SHAKER, TAITEC), stirred at 25°C and 300 rpm for 1 minute. Implant 0.1 mL of the obtained bacterial solution into 9.9 mL of each treatment solution after stirring, and use a shaking incubator to contact it for 15 minutes at 25°C and 150 rpm, then separate the treatment solution after planting the bacteria Add 0.5 mL of it to 4.5 mL of LP diluent (manufactured by Nippon Pharmaceutical Co., Ltd.) added with 0.5% sodium thiosulfate to deactivate the bactericidal component. The deactivated treatment solution was diluted step by step, and poured plate culture was performed using SCD agar medium, and cultured at 37° C. for 16 hours. After culturing, measure the number of colonies obtained, calculate the common logarithmic value of the number of bacteria (CFU/mL), and judge the bactericidal performance in three grades according to the following evaluation axis. ◎: The number of live bacteria is 0 (completely sterilized) ○: The number of live bacteria exceeds 0 and is less than 6 (with a bactericidal effect) ×: The number of live bacteria exceeds 6 (without a bactericidal effect)

(5) Evaluation method of enzyme activity Add 50 ppm of BSA (bovine serum albumin, Wako Pure Chemical Industries, Ltd.) as a protein matrix to 1 mL of each treatment solution prepared in <Step 2> described in Table 1, and stir for 3 seconds with a vortex mixer , and incubated at 25°C. After 30 minutes, mix the reaction solution with 2×Ez-Apply sample buffer (manufactured by Atto Co., Ltd.) containing 10 mM phenylmethylsulfonyl fluoride at a ratio of 1:1, and stir with a vortex mixer for 3 seconds. , and incubated at 100°C for 5 minutes. The electrophoresis gel was e・PAGEL e-T1020L (manufactured by Atto Co., Ltd.), and the molecular weight marker was used XL-Ladder Broad SP-2110 (manufactured by APRO SCIENCE Co., Ltd.), and electrophoresis was performed at 40 mA for 80 minutes (WSE-1100PageRun -R (manufactured by Atto Co., Ltd.)). For the staining of the gel, One-step Ruby (manufactured by APRO SCIENCE) was used. A fluorescent image of the gel was taken, and the intensity of the band in the 50-80 kDa region was measured from the acquired image using image analysis software (manufactured by Bio-Rad). The BSA decomposition rate was calculated by the following formula as an index of enzyme activity, and the enzyme activity was judged in three grades according to the following evaluation axes. BSA decomposition rate (%) = 100 - (decomposed band strength ÷ undecomposed band strength) × 100 ◎: More than 90% ○: More than 70% and less than 90% ×: Less than 70%

<Example 2 and Comparative Example 2> As shown in Table 2, in Example 2 (Examples 2-1 to 2-3) and Comparative Example 2 (Comparative Examples 2-1 to 2-2), in addition to using the components used in Example 1, Use the following ingredients. [(c) ingredient] Protease (Savinase 8.0T, Novozymes) [(d) ingredient] Anionic surfactant: sodium dodecylbenzenesulfonate Nonionic surfactant: polyoxyethylene (average added mole number 6) lauryl ether [other ingredients] spices

＜Measurement of degerming activity value＞ The sterilization test for evaluating the sterilization performance of Escherichia coli adhering to the cotton cloth assumes actual cleaning and is carried out according to the method of A.N. Petrocci et al. described in Journal of the Association of Official Analytical Chemists 52; 836-842. The specific procedure is shown below.

(Cotton pretreatment) As the cotton cloth for the sterilization test, fine white cloth No. 3 (according to JIS L0803) was used, and pretreatment was performed by the method shown below before the test. Dissolve 5 g each of polyoxyethylene sorbitan fatty acid ester and sodium carbonate in water, and dilute to 1000 mL as a wetting agent. Dissolve 2.5 g of wetting agent and 2.5 g of sodium carbonate in water to prepare 5 L of cleaning solution. Put the cotton cloth in it, after boiling for about 1 hour, change to distilled water and boil for about 5 minutes. Furthermore, it was stirred in 5 L of cold distilled water for about 5 minutes, and air-dried.

(cutting of test cloth) The pretreated cotton cloth was cut to obtain 2.5 cm×3.75 cm cotton cloth and 5.3 cm×275 cm cotton cloth. A 5.3 cm x 275 cm cotton cloth was wound onto a stainless steel spindle as described in Journal of the Association of Official Analytical Chemists 52; 837 to prepare a loaded cloth for making the ratio of the test liquid to the cotton cloth close to the actual cleaning. To 2.5 cm x 3.75 cm cotton cloth, use the method shown below to add bacterial liquid to make test cloth. In addition, the subsequent operations were carried out using cloths, water, instruments, etc. which were sterilized at 121° C. for 10 minutes, unless otherwise specified.

(Addition of Escherichia coli solution) After sterilizing the test cloth at 121° C. for 25 minutes in an autoclave, 10 μL of purified water was added to the test cloth. Next, 1.9 mL of Escherichia coli solution adjusted to have a bacterial count of 5.0×10 ⁸ to 5.0×10 ⁹ cfu/mL and 0.1 mL of horse serum (manufactured by Invitrogen) were mixed to prepare a mixed solution, and the mixture was added to the above-mentioned test cloth. Mixed solution 20 μL. Put 3 pieces of the test cloth into a petri dish covered with filter paper, and keep it in a desiccator whose humidity is adjusted with a saturated aqueous solution of disodium hydrogen phosphate in an incubator whose temperature is adjusted to 35±2°C for 40 minutes. Insert 3 pieces of test cloth with bacteria solution between the load cloths wound on the main shaft.

(Preparation of treatment liquid (cleaning liquid)) The following steps 1 and 2 were carried out to prepare the treatment liquids of Examples 2-1 to 2-3 and the treatment liquids of Comparative Examples 2-1 to 2-2. ＜Step 1＞ According to the formulation ratio shown in Table 2, the composition for treating liquid before pH adjustment was obtained. After adding 2.00 g of the composition for treatment liquids in Examples or Comparative Examples before pH adjustment to a glass container, 3° dH hard water was added to make the total amount 1000 g, and stirred for 1 minute. ＜Step 2＞ Citric acid and succinic acid were added to each of the aqueous solutions prepared in <Step 1> so that the pH of the treated solution after pH adjustment became the pH shown in Table 2. The pH value of each treatment solution was measured before and after pH adjustment.

(Bacteria removal test) Immerse the load cloth inserted with the test cloth in a glass container containing 250 mL of the prepared treatment liquid, cover the glass container, and install it on a rotating device (manufactured by MATSUSHITA INDUSTRY) at a speed of 60 rpm Spin for 10 minutes. After the test, use tweezers to take out 3 pieces of test cloth, add SCDLP medium (Soybean-Casein Digest Broth with Lectin & Polysorbate 80 manufactured by Nippon Pharmaceutical Co., Ltd.) supplemented with 0.5% sodium thiosulfate into a 50 mL centrifuge tube 30 mL, and extract the test bacteria inoculated on the test cloth by a test tube mixer for 1 minute. This extract was diluted stepwise using SCDLP medium supplemented with 0.5% sodium thiosulfate to obtain dilutions (test samples) with different dilution ratios. Also, for the three test cloths that were not treated with the treatment solution after adding the bacterial solution, they were also extracted using a centrifuge tube, and the extraction solution was diluted to obtain dilutions (control samples) with different dilution ratios. Dispense 1.0 mL of each dilution of the test sample and control sample into a sterilized petri dish, add 15-20 mL of nutrient agar medium, and mix thoroughly. Cover the petri dish and place it at room temperature. After the medium solidifies, turn the petri dish upside down and culture it in a constant temperature bath at 37°C for 1 to 2 days, then calculate the number of bacteria by counting the number of colonies. According to the following formula, the bactericidal activity value Δlog (cfu/test cloth) was obtained from the number of living bacteria. Bactericidal activity value (Δlog (cfu/test cloth)) = (common logarithm of the number of bacteria in the test cloth of the control sample (cfu/test cloth)) - (the number of bacteria in the test cloth of the test sample (cfu/test) common logarithm of cloth) From the sterilizing activity value, the sterilizing performance was evaluated as follows. ◎・・・log4≦bacterial activity value ○・・・log2≦bacterial activity value＜log4 ×・・・Sterilization activity value＜log2

[Table 1] Example comparative example 1-1 1-2 1-3 1-4 1-5 1-6 1-7 1-1 1-2 1-3 1-4 1-5 Treatment fluid Composition (ppm) ^※2 (a) sodium percarbonate 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 (a') Sodium carbonate 500 (b) (b1) TAED 20 20 20 20 20 20 20 20 20 20 (b2) NOBS 32 (b') (b'1) LOBS 40 (c) protease 1.5 1.5 1.5 1.5 1.5 1.5 1.5 ^※1 1.5 1.5 1.5 1.5 1.5 (d) AES 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 distilled water margin margin margin margin margin margin margin margin margin margin margin margin pH value of the treatment solution after step 1 10.5 10.5 10.5 10.5 10.5 10.5 10.5 10.5 10.5 10.5 10.5 10.5 pH value of the treatment solution after step 2 8.5 7.5 6.5 7.5 7.5 7.5 7.5 7.5 10.5 9.5 5.0 7.5 pH adjuster citric acid citric acid citric acid Succinic acid Phosphate buffer Phosphate buffer citric acid citric acid - citric acid citric acid Phosphate buffer Bactericidal performance when cloth coexists (bath ratio 10) The number of bacteria <Log(CFU/mL)> ◎ 0.00 ◎ 0.00 ◎ 0.00 ◎ 0.00 ◎ 0.00 ◎ 0.00 ◎ 0.00 × 6.76 × 6.48 × 6.53 ◎ 0.00 × 6.03 Enzyme activity BSA decomposition rate <%> ◎ 93.5 ◎ 96.8 ◎ 96.5 ◎ 95.5 ◎ 94.4 ◎ 92.6 ◎ 93.8 ○ 81.5 × 24.3 × 62.7 × 66.8 ◎ 92.3 *1: Add (c) component in step 2. ※2: Composition after step 2.

[Table 2] Example comparative example 2-1 2-2 2-3 2-1 2-2 Composition for treatment liquid Composition (mass ratio) Step 1 using ingredients (a) sodium percarbonate 20.0 20.0 20.0 20.0 20.0 (b1) TAED 1.0 1.0 1.0 (b2) NOBS 1.6 (b'1) LOBS 2.0 (c) protease 0.6 0.6 0.6 0.6 0.6 (d) anionic surfactant 5.3 5.3 5.3 5.3 5.3 nonionic surfactant 4.4 4.4 4.4 4.4 4.4 spices 0.6 0.6 0.6 0.6 0.6 Step 2 using ingredients pH adjuster Succinic acid citric acid Succinic acid - Succinic acid pH value of the treatment solution after step 1 10.5 10.5 10.5 10.5 10.5 pH value of the treatment solution after step 2 8.5 8.5 8.5 10.5 8.5 Sterilization performance (Escherichia coli) ◎ ◎ ◎ ○ x

Claims (10)

A cleaning method for fiber products, which comprises the following steps: Mixing (a) an oxygen-based bleach [hereinafter referred to as (a) component], (b) a bleach activator that reacts with active oxygen to produce an organic peracid with a carbon number of 1 to 11 [hereinafter referred to as (b) ) ingredients], and water, to obtain a composition with a pH value above 9.5; A step of adjusting the pH value of the above-mentioned composition having a pH value of 9.5 or higher to 5.5 to 9.0; and The above-mentioned composition adjusted to a pH of 5.5 to 9.0 contains (c) an enzyme [hereinafter referred to as (c) component] and (d) a surfactant [hereinafter referred to as (d) component] and The step of contacting fiber products. The method for cleaning fiber products as claimed in claim 1, wherein the component (b) is one or more bleach activators selected from tetraacetylethylenediamine and compounds represented by the following general formula (b-1), R ¹ -C(=O)-LG (b-1) (wherein, R ¹ is an alkyl group having 1 to 10 carbon atoms, and LG is a leaving group). The method for cleaning fiber products as claimed in claim 2, wherein in the general formula (b-1), LG is one or more selected from the following formulae, [Chemical 1]

(In the formula, M is a hydrogen atom, an alkali metal, or an alkaline earth metal). The method for cleaning fiber products according to any one of Claims 1 to 3, wherein the component (a) is a substance that generates HO ₂ ^- in water. The method for cleaning fiber products according to any one of claims 1 to 4, wherein component (a) is one or more selected from percarbonate and perborate. The method for cleaning fiber products according to any one of claims 1 to 5, wherein component (c) is a protease. The method for cleaning fiber products according to any one of claims 1 to 6, wherein the component (d) is one or more surfactants selected from anionic surfactants and nonionic surfactants. The method for cleaning fiber products according to any one of Claims 1 to 7, wherein component (c) is mixed into the composition before adjusting the pH value of the composition having a pH value of 9.5 or higher to 5.5 or higher and 9.0 or lower . The method for cleaning fiber products according to any one of claims 1 to 8, wherein when the above-mentioned composition adjusted to a pH value of 5.5 to 9.0 is brought into contact with the fiber products, the bath ratio is 2 to 100. A method for sterilizing fiber products, comprising the following steps: Mixing (a) an oxygen-based bleach [hereinafter referred to as (a) component], (b) a bleach activator that reacts with active oxygen to produce an organic peracid with a carbon number of 1 to 11 [hereinafter referred to as (b) ) ingredients], and water, to obtain a composition with a pH value above 9.5; A step of adjusting the pH value of the above-mentioned composition having a pH value of 9.5 or higher to 5.5 to 9.0; and The above-mentioned composition adjusted to a pH of 5.5 to 9.0 contains (c) an enzyme [hereinafter referred to as (c) component] and (d) a surfactant [hereinafter referred to as (d) component] and The step of contacting fiber products.