Washing methods for textile products

Abstract

This invention provides a method for washing textile products that suppresses undissolved beneficial substance delivery particles even under conditions of a small bath ratio, and enables the delivery of beneficial substances evenly between textile products. [Solution] A method for washing textile products, comprising: preparing a treatment solution by mixing beneficial substance delivery particles containing beneficial substances, having a dissolution rate of 20% by mass or more and 70% by mass or less after 1 minute in a specific solubility test, and a dissolution rate of 70% by mass or more after 5 minutes, with a detergent composition and water, in a mixing ratio of water to 15 parts by mass or less per 1 part by mass of the textile product to be washed; and washing the textile product with the treatment solution.

Description

[Technical Field]

[0001] This invention relates to a method for cleaning textile products and beneficial substance delivery particles. [Background technology]

[0002] In recent years, research has been conducted on technologies that impart functions such as fragrance, sterilization, disinfection, antibacterial properties, and UV protection to clothing using auxiliary components other than detergent during washing. Attempts have been made to attach beneficial substances to textile products by adding beneficial substance delivery particles, which are particles on a solid carrier that support these beneficial substances, separately from the detergent during washing. For example, one example of beneficial substance delivery particles is fragrance delivery particles, which are particles on which fragrances are supported by a solid carrier.

[0003] Patent Document 1 discloses a composition comprising a plurality of particles, wherein the particles comprise a water-soluble carrier, a branched-chain polyester, and an optional adhesion aid. Patent Document 2 discloses a fragrance-enhancing bead composition for clothing, comprising sugar particles, a liquid essence, and silica, wherein the sugar particles form a core, and the liquid essence and silica coat the surface of the sugar particles. Patent Document 3 discloses a solid granular material for use as a detergent or in a detergent, comprising a specific anionic surfactant component and a granular material forming agent, wherein the cohesive force of the solid granular material is within a specific range. [Prior art documents] [Patent Documents]

[0004] [Patent Document 1] Special Publication No. 2021-524873 [Patent Document 2] Special Publication No. 2023-546254 [Patent Document 3] Special Publication No. 2022-536831 [Overview of the project] [Problems that the invention aims to solve]

[0005] To reduce the frequency of washing, textile products are sometimes washed in batches. However, when the amount of textile products is large relative to the treated water used for washing, the textile products may not circulate properly in the washing machine. This can lead to a higher likelihood of beneficial substance delivery particles remaining undissolved, and may also result in uneven delivery of beneficial substances between textile products in the washing tub, for example, between textile products at the top and those at the bottom. The present invention provides a method for washing textile products and beneficial substance delivery particles that can suppress undissolved beneficial substance delivery particles even under conditions of a small bath ratio, and deliver beneficial substances evenly between textile products. [Means for solving the problem]

[0006] In one embodiment, the present invention provides a method for washing textile products, comprising: preparing a treatment solution by mixing beneficial substance delivery particles containing a beneficial substance, having a dissolution rate of 20% by mass or more and 70% by mass or less after 1 minute and a dissolution rate of 70% by mass or more after 5 minutes according to the following solubility test, a detergent composition, and water, in a mixing ratio of water to 15 parts by mass or less per 1 part by mass of the textile product to be washed; and washing the textile product with the treatment solution. <Solubility Test> Add 1 liter of water warmed to 5°C to a 1 liter glass beaker, stir with a magnetic stirrer (round stirring bar with a diameter of 4 cm, 600 rpm), and add 1 g of beneficial substance delivery particles. After 1 or 5 minutes have elapsed since adding the beneficial substance delivery particles, filter the water containing the sample (beneficial substance delivery particles) through a 200-mesh filter, dry the remaining sample with the filter in an electric dryer set to 60°C for 2 hours, calculate the mass of undissolved beneficial substance delivery particles after drying based on the mass of the filter, and calculate the solubility using the following formula (1). Dissolution rate (mass%) = 100 - [(Mass of beneficial substance delivery particles after drying of undissolved material after 1 or 5 minutes) / (Mass of added beneficial substance delivery particles)] × 100 (1)

[0007] Furthermore, in another embodiment, the present invention provides beneficial substance delivery particles containing the following component (a) and one or more selected from the following components (b1), (b2), and (b3), wherein the dissolution rate after 1 minute in the solubility test is 20% by mass or more and 70% by mass or less, and the dissolution rate after 5 minutes is 70% by mass or more. (a) Ingredients: One or more selected from fragrances and fragrance precursors. (b1) Components: Water-soluble inorganic salt (b2) Component: Water-soluble organic polymer compound (b3) Components: Fatty acids with 8 to 20 carbon atoms or their salts [Effects of the Invention]

[0008] According to the present invention, a method for washing textile products and beneficial substance delivering particles are provided that can suppress undissolved beneficial substance delivering particles even under conditions of a small bath ratio, and deliver beneficial substances evenly between textile products. [Modes for carrying out the invention]

[0009] The reason why the present invention's method for washing textile products suppresses undissolved beneficial substance delivery particles even under conditions of a small bath ratio, and enables the delivery of beneficial substances evenly between textile products, is not entirely clear, but it is presumed to be as follows. Even in a treatment solution mixed at a ratio of 15 parts by mass or less of water per 1 part by mass of the textile product to be washed, the dissolution rate of beneficial substance delivery particles after 5 minutes in a specific solubility test is 70% by mass or more, which suggests that undissolved beneficial substance delivery particles are suppressed. Furthermore, the dissolution rate of beneficial substance delivery particles after 1 minute in the same dissolution test is 20% by mass or more and 70% by mass or less, which suggests that beneficial substances were delivered to the textile product without bias in the washing tank. In this specification, efficiently fragrance a textile product includes delivering beneficial substances to the textile product without bias. This effect is thought to have suppressed the undissolved residue of beneficial substance delivery particles even under conditions of a small bath ratio, allowing for the even distribution of beneficial substances between textile products. It should be noted that the method for washing textile products of the present invention is not limited to these mechanisms in any way.

[0010] [Method for washing textile products] In an exemplary embodiment, the method for washing textile products of the present invention comprises: preparing a treatment liquid [hereinafter, also referred to as the treatment liquid of the present invention] by mixing beneficial substance delivery particles containing a beneficial substance, having a dissolution rate after 1 minute of 20% by mass or more and 70% by mass or less and a dissolution rate after 5 minutes of 70% by mass or more determined by the following solubility test, a detergent composition, and water, wherein the mixing ratio of said water is 15 parts by mass or less of water relative to 1 part by mass of the textile product to be washed; and washing the textile product with said treatment liquid.

[0011] <Solubility Test> Add 1 L of water temperature-controlled at 5°C to a 1 L glass beaker, stir with a magnetic stirrer (round stirring bar with a diameter of 4 cm, 600 rpm), and add 1 g of the beneficial substance delivery particles. After 1 minute or 5 minutes has elapsed since adding the beneficial substance delivery particles, the entire water containing the sample (beneficial substance delivery particles) is filtered through a 200-mesh sieve, the sample remaining together with the filter is dried for 2 hours in an electric dryer set at 60°C, the mass of the dried undissolved beneficial substance delivery particles is calculated based on the mass of the filter after drying, and the dissolution rate is calculated by the following formula (1). Examples of the stirring bar include a cross-head rotor with a height of 14 mm and a diameter of 4 cm. Dissolution rate (% by mass) = 100 - [(mass of dried undissolved beneficial substance delivery particles after 1 minute or 5 minutes elapsed) / (mass of added beneficial substance delivery particles)] × 100 (1)

[0012] Hereinafter, the method for washing textile products of the present invention will be described with specific examples, but the method for washing textile products of the present invention is not limited to the specific examples in any way.

[0013] In an exemplary embodiment, the method for washing textile products of the present invention may be a method for washing textile products comprising: step 1 (hereinafter referred to as step 1) of preparing a treatment solution by mixing the beneficial substance delivery particles, a detergent composition, and water in a mixing ratio of water to 15 parts by mass or less of water per 1 part by mass of the textile product to be washed; and step 2 of washing the textile product with the treatment solution prepared in step 1.

[0014] [Process 1] Step 1 is a step of preparing a treatment solution by mixing the beneficial substance delivery particles, the detergent composition, and water. In Step 1, 15 parts by mass or less of water is used per 1 part by mass of the textile product to be treated. In Step 1, for example, the textile product and the detergent composition can be placed in a washing tank, and the beneficial substance delivery particles can be added while water is being added to bring them into contact with the textile product. However, from the viewpoint of more effectively enjoying the effects of the present invention, it is preferable to bring the textile product and the beneficial substance delivery particles into contact in the washing tank and then add water to the washing tank. The timing of adding the detergent composition may be before adding the textile product, after adding the textile product but before adding water, while adding water, or after adding water.

[0015] <Beneficial substance delivery particles> The beneficial substance delivery particles contain a beneficial substance, and the dissolution rate after 1 minute in the solubility test is 20% by mass or more and 70% by mass or less, and the dissolution rate after 5 minutes is 70% by mass or more. The beneficial substance delivery particles may be a mixture containing multiple types of particles, and if the beneficial substance delivery particles are a mixture, the solubility rate may be the solubility rate in the mixture.

[0016] The beneficial substance delivery particles have a dissolution rate of 20% by mass or more, preferably 30% by mass or more, more preferably 40% by mass or more, and even more preferably 50% by mass or more, from the viewpoint of suppressing undissolved residue after washing and promoting efficient fragrance application to textile products, and from the viewpoint of promoting efficient fragrance application to textile products, 70% by mass or less, preferably 65% ​​by mass or less, more preferably 63% by mass or less, and even more preferably 61% by mass or less.

[0017] The beneficial substance delivery particles have a dissolution rate of 70% by mass or more, preferably 80% by mass or more, more preferably 90% by mass or more, and even more preferably 99% by mass or more, as determined by the solubility test after 5 minutes, from the viewpoint of suppressing undissolved residue after washing, and may be, for example, 100% by mass or less, or even 100% by mass.

[0018] The beneficial substance delivery particles may be, for example, a water-soluble solid carrier and particles containing the beneficial substance. From the viewpoint of promoting efficient fragrance application to textile products, particles on which the beneficial substance is supported by a water-soluble solid carrier are preferred. The beneficial substance delivery particles may be, for example, a fragrance delivery substance in which the beneficial substance is a fragrance.

[0019] (Water-soluble solid carrier) The water-soluble solid carrier for the beneficial substance delivery particles may have a solubility of 1.0 g or more in 100 g of water at 20°C, and preferably has a solubility of 1.0 g or more and 60 g or less.

[0020] The water-soluble solid carrier may have pores on its surface, and its average pore diameter is preferably 1 nm or more, more preferably 10 nm or more, from the viewpoint of improving storage stability, increasing the strength of the resulting beneficial substance delivery particles, and enhancing the function of the beneficial substance, and preferably 1,000 μm or less, more preferably 100 μm or less, from the viewpoint of further increasing the strength of the beneficial substance delivery particles and enhancing the function of the beneficial substance. The average pore diameter of the pores present on the surface of the water-soluble solid carrier can be measured by the mercury intrusion method using a mercury porosimeter (e.g., Autopore IV9500 (manufactured by Shimadzu Corporation)), and the value of the average pore diameter can be calculated using AveragePoreDiameter (4V / A).

[0021] The water-soluble solid carrier may preferably have a bulk density of 450 g / L or more, more preferably 500 g / L or more, from the viewpoint of further increasing the strength of the beneficial substance delivery particles, and may preferably have a bulk density of 750 g / L or less, more preferably 650 g / L or less, from the viewpoint of improving solubility. The bulk density of the water-soluble solid carrier is calculated using a bulk density meter in accordance with JIS K7365.

[0022] The water-soluble solid carrier may preferably have an average particle size of 1.0 mm or more, more preferably 3.0 mm or more, and preferably an average particle size of 20 mm or less, more preferably 15 mm or less, even more preferably 10 mm or less, and even more preferably 5 mm or less. The average particle size of a water-soluble solid carrier can be measured by placing the water-soluble solid carrier on a glass slide, placing a coverslip on top, obtaining a microscopic image using a microscope (e.g., VHX-5000 digital microscope, manufactured by KEYENCE, 50x magnification), and calculating the equivalent spherical diameter of 250 particles using the image analysis software ImageJ.

[0023] From the viewpoint of solubility of beneficial substance delivery particles, the water-soluble solid carrier is preferably one or more selected from water-soluble inorganic salts, and more preferably one or more selected from water-soluble alkali metal salts and water-soluble alkaline earth metal salts. Specifically, the water-soluble solid carrier can be one or more selected from water-soluble inorganic sulfates such as magnesium sulfate and sodium sulfate, and water-soluble inorganic chlorides such as sodium chloride and magnesium chloride. From the viewpoint of preventing changes in the quality of beneficial substances, preferably fragrances, and from the viewpoint of solubility of beneficial substance delivery particles, the water-soluble solid carrier may preferably be a water-soluble inorganic sulfate, more preferably magnesium sulfate. The water-soluble solid carrier may also contain a water-soluble organic polymer compound, which will be described in detail later.

[0024] The beneficial substance delivery particles contain a water-soluble solid carrier in an amount of preferably 50% by mass or more, more preferably 70% by mass or more, and preferably 99% by mass or less, and more preferably 90% by mass or less.

[0025] (beneficial substance) The beneficial substance contained in the beneficial substance delivery particles may preferably be a substance beneficial to textile products. The beneficial substance delivery particles of the present invention may be particles for delivering beneficial substances to textile products. The beneficial substance may be, for example, a compound that is beneficial to textile products and does not easily adsorb to textile products during normal washing processes.

[0026] The beneficial substance is a compound that is beneficial to textile products and does not easily adsorb to textile products during normal washing processes. For example, it may be a compound with a low molecular weight and no adsorption groups such as cationic groups. Specifically, this includes one or more compounds selected from alcohols, esters, ketones, aldehydes, and phenolic compounds, preferably with a molecular weight of 120 or more, more preferably 130 or more, and preferably 500 or less, and more preferably 400 or less.

[0027] The beneficial substances specifically include one or more selected from fragrances, fragrance precursors, oils (silicones, oil-soluble polymers), antioxidants, cooling agents, warming agents, antibacterial agents, dyes, pigments, UV absorbers, solvents, moisturizers and other skincare ingredients, cosmetic oils, preservatives, insecticidal ingredients, and insect repellent ingredients. When the beneficial substance delivery particles of the present invention are used in textile products, the beneficial substances are preferably (1) one or more selected from fragrances and fragrance precursors, (2) antioxidants, and (3) one or more selected from antibacterial agents. Note that the fragrances and fragrance precursors of the beneficial substances do not include microcapsules in which fragrances are encapsulated in a shell (sometimes called a casing) as described later.

[0028] There are no particular restrictions on the fragrance, but for example, fragrance compounds described in Motoki Nakajima, "Basic Knowledge of Fragrances and Perfumery," 4th edition, Sangyo Tosho Co., Ltd., April 20, 2005, or fragrance compounds known to be incorporated into fabric softeners through patent documents, etc., can be used. The fragrance compound may be a single compound or a mixture of two or more. In addition, fragrance components or fragrance compositions prepared independently by fragrance manufacturers can be used. The fragrance may be a single fragrance compound or a fragrance composition made by mixing two or more of the fragrance compounds, and the fragrance composition may contain a fragrance diluent or solvent in addition to the fragrance compound. Furthermore, a fragrance precursor can be used as the fragrance.

[0029] From the viewpoint of improving the loading and retention of the fragrance compound on a water-soluble solid carrier, examples of fragrance compounds include those having a ClogP value of 1.0 or more and 6.0 or less, and the ClogP value may preferably be 1.0 or more, more preferably 2.0 or more, even more preferably 2.3 or more, even more preferably 2.5 or more, and preferably 6.0 or less, more preferably 5.5 or less, and even more preferably 5.0 or less.

[0030] Examples of fragrance compounds include the following. Here, the numbers in parentheses represent the ClogP values. Amyl cinnamic aldehyde (4.3), 2-methyl undecanal (4.7), ethyl-3-methyl-3-phenyloxiran-2-carboxylate (3.0), allyl amyl glycolate (2.3), allyl caproate (3.2), allylcyclohexyl propionate (4.5), allyl heptanoate (3.2), ambrettelide (5.4), ambroxan® (4.8), amyl salicylate (4.6), isoamyl salicylate (4.5), benzyl benzoate (4.0), benzyl salicylate (4.3), benzyl acetate (2.0) ), Bouguerinal (3.9), OT-butylcyclohexyl acetate (4.4), PT-butylcyclohexyl acetate (4.4), Cashmeran® (4.5), Cedyl methyl ether (5.0), 1,4-cineole (3.1), 1,8-cineole (3.1), citronellol (3.6), citronellyl acetate (4.6), citronellyl nitrile (3.6), cyclamenaldehyde (3.9), cyclohexyl salicylate (4.9), damascenone (4.2), α-damascone (4.3), β-damascone (4.4), δ-damascone (4.2) ), decanal (3.8), dihydromyrcenoyl (3.5), dimethyltetrahydrobenzaldehyde (2.9), diphenyl oxide (4.1), (1-cyclohexyl-2-methylpropane-2-yl)butanoate (4.4), ethylene brassirate (4.7), ethylenedodecanediate (4.2), ethyl-2-methylbutyrate (2.3), ethyl vanillin (1.6), eugenol (2.7), fluate® (3.6), geraniol (3.5), geranyl acetate (4.5), geranylnitrile (3.9), hexyl Cinnamic aldehyde (4.8), hexyl acetate (4.8), hexyl salicylate (5.1), cis-3-hexenyl salicylate (4.8), Iso E Super® (5.2), α-ionone (3.9), β-ionone (4.4), propan-2-yl-2-methylbutanoate (2.7), Javanol® (4.7), Lilial® (4.4), limonene (4.9), linalool (3.3), linalyl acetate (4.4), Lilal® (3.3), manzanate (2.8), methyl dihydrojasmonate (3.0), Methyl anthranilate (2.3), Methyl β-naphthyl ketone (2.9), γ-methyl ionone (4.8), Methyl salicylate (2.6), 11-Oxa-16 hexadecanolide (4.9), Nectaril (registered trademark) (5.1), Nerol (3.7), Neroline jalayala (3.3), γ-nonalactone (2.1), Nonanal (3.3), Octanal (2.8), Phenylhexanol (3.5), Propan-2-yl-2-methylbutanoate (2.7), Sandal Mysore Core ( Examples include one or more fragrance compounds selected from (Registered Trademark) (4.7), terpineol (3.3), terpinyl acetate (4.3), tetrahydrolinalool (3.6), tricyclodecenyl acetate (2.9), tricyclodecenyl propionate (3.3), γ-undecalactone (3.1), ethylene brecilate (4.7), florosa (Registered Trademark) (2), isoamyl acetate (2.3), stearyl acetate (2.5), tripral (2.9), and dynascone (Registered Trademark) (4.5).

[0031] Examples of fragrance precursors include compounds that release fragrance components in reaction to water, and compounds that release fragrance components in reaction to light. Compounds that release fragrance components in reaction to water include silicate ester compounds having an alkoxy component derived from fragrance alcohol, fatty acid ester compounds having an alkoxy component derived from fragrance alcohol, acetal compounds or hemiacetal compounds obtained by the reaction of a carbonyl component derived from fragrance aldehyde or fragrance ketone with an alcohol compound, Schiff base compounds obtained by the reaction of a carbonyl component derived from fragrance aldehyde or fragrance ketone with a primary amine compound, and hemiaminal compounds or hydrazone compounds obtained by the reaction of a carbonyl component derived from fragrance aldehyde or fragrance ketone with a hydrazine compound. Compounds that release fragrance components in reaction to light include 2-nitrobenzyl ether compounds having an alkoxy component derived from fragrance alcohol, α-ketoester compounds having a carbonyl component derived from fragrance aldehyde or fragrance ketone, and coumaric acid ester compounds having an alkoxy component derived from fragrance alcohol. These fragrance precursors may be used as polymers, for example, as reaction products between some carboxyl groups of polyacrylic acid and fragrance alcohols.

[0032] The antioxidant is not particularly limited, as long as it is a compound that is generally known to have antioxidant effects. The antioxidant may be used alone or in combination of two or more. Examples of antioxidants include phenolic antioxidants. Specific antioxidant compounds include, for example, 3,5-di-tert-butyl-4-hydroxytoluene (BHT), tert-butyl-p-hydroxyanisole (BHA), 2,2'-ethylidenbis(4,6-di-tert-butylphenol), p-methoxyphenol, γ-oryzanol, β-naphthol, tocopherol (vitamin E), octadecyl 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid, [2-tert-butyl-6-(3-tert-butyl-2-hydroxy-5-methylbenzyl)-4-methylphenyl], and {2-[1-(2-hydroxy-3,5-di-tert-pentylphenyl)ethyl]-4,6-di-tert-pentylphenyl}. Examples include 4,4'-butylidenebis(3-methyl-6-tert-butylphenol), 4,4'-thiobis(3-methyl-6-tert-butylphenol), tetrakis[methylene-3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate]methane, 3,9-bis{2-[3-(3-tert-butyl-4-hydroxy-5-methylphenyl)-propionyloxy)-1,1-dimethylethyl]-2,4,8,10-tetraoxaspiro[5,5]undecane}, octadecyl 3,5-di-tert-butyl-4-hydroxycinnamate, 2,6-di-tert-butyl-4-methylphenol, and methyl 3,5-di-tert-butyl-4-hydroxybenzenepropanoate.

[0033] Examples of phenolic antioxidants include various phenolic compounds marketed by ADEKA Corporation under the product name "ADEKA Stab AO" series, and compounds that fall under the category of phenolic compounds among the various compounds marketed by BASF under the product name "IRGANOX" series. RALOX 35 (trademark) and / or Tinogard TS (trademark) are also examples.

[0034] Furthermore, examples of antioxidants include nordihydroguaretic acid, 2,2'-methylene-bis-(4-methyl-6-tert-butylphenol), dilaurylthiodipropionate, triphenylphosphite, distyrenated cresol, sodium sulfite, sodium bisulfite, ethoxyquin, 2,2,4-trimethyl-1,2-dihydroquinoline, 2,6-di-tert-butylhydroquinone, lignosulfonic acid and its salts, and mixtures thereof. Ethoxyquin (1,2-dihydro-6-ethoxy-2,2,4-trimethylquinoline) is marketed under the name Raluquin® by the Raschig® Company. Furthermore, examples of antioxidants include tannins such as 6-hydroxy-2,5,7,8-tetramethylchroman-2-carboxylic acid (Trolox®), 1,2-benzoisothiazolin-3-one (Proxel GXL®), tocopherol sorbate, butylated hydroxylbenzoic acid and its salts, gallic acid and its alkyl esters, uric acid and its salts, sorbic acid and its salts, dihydroxyfumaric acid and its salts, gallotannins, ellagitannins, complex tannins, condensed tannins, and tannins selected from the group consisting of combinations thereof.

[0035] Examples of antimicrobial agents include triclosan (ClogP: 5.5), diclosan (ClogP: 4.9), 3-methyl-4-isopropylphenol (ClogP: 3.4), phenoxyethanol (ClogP: 1.39), and benzyl alcohol (ClogP: 1.1). One or more antimicrobial agents may be used.

[0036] Furthermore, the antibacterial agent may be, for example, a cationic surfactant. Examples of such antibacterial agents include one or more selected from quaternary ammonium salt type antibacterial agents. The quaternary ammonium salt type antibacterial agent is preferably one or more selected from tetraalkylammonium salts represented by the following general formula (1) and trialkylbenzylammonium salts represented by the following general formula (2).

[0037] [Chem.]]

[0038] (wherein R 1 represents an aliphatic hydrocarbon group having 8 to 18 carbon atoms. R 2 represents a group selected from an aliphatic hydrocarbon group having 8 to 18 carbon atoms, an alkyl group having 1 to 3 carbon atoms, and a hydroxyalkyl group having 1 to 3 carbon atoms. R 3 and R 4 each independently represent a group selected from an alkyl group having 1 to 3 carbon atoms and a hydroxyalkyl group having 1 to 3 carbon atoms. X - represents an anion.)

[0039] [Chem.]]

[0040] (wherein R 5 represents an aliphatic hydrocarbon group having 8 to 18 carbon atoms. R 6 and R 7 each independently represent a group selected from an alkyl group having 1 to 3 carbon atoms and a hydroxyalkyl group having 1 to 3 carbon atoms. X - represents an anion.)

[0041] In general formula (1), R 1 is preferably an alkyl group or an alkenyl group, more preferably an alkyl group. Further, from the viewpoint of antibacterial properties, the number of carbon atoms of R 1 is 8 or more, and from the same viewpoint, it is 18 or less, preferably 14 or less, more preferably 10 or less.

[0042] In general formula (1), R 2 is preferably an alkyl group or an alkenyl group, more preferably an alkyl group. When R 2 is an aliphatic hydrocarbon group having 8 to 18 carbon atoms, R 2The number of carbon atoms is 8 or more from the viewpoint of antibacterial properties, and from the same viewpoint, it is 18 or less, preferably 14 or less, and more preferably 10 or less.

[0043] In general formula (1), R 3 and R 4 Each of these is preferably an alkyl group having 1 to 3 carbon atoms. Examples of alkyl groups having 1 to 3 carbon atoms include methyl, ethyl, propyl, and 1-methylethyl groups. Examples of hydroxyalkyl groups having 1 to 3 carbon atoms include hydroxymethyl, hydroxyethyl, and hydroxypropyl groups.

[0044] In general formula (1), X - It is an anion. Examples of anions include halide ions such as chloride ions, bromide ions, and iodide ions; and alkyl sulfate ions such as methyl sulfate ions, ethyl sulfate ions, and propyl sulfate ions.

[0045] Examples of compounds represented by general formula (1) include one or more selected from alkyltrimethylammonium salts having 10 to 18 carbon atoms in the alkyl group, dialkyldimethylammonium salts and dialkylmethylethylammonium salts having 8 to 16 carbon atoms in the alkyl group, and alkylethyldimethylammonium salts having 12 to 16 carbon atoms in the alkyl group.

[0046] In general formula (2), R 5 The group is preferably an alkyl group or an alkenyl group, and more preferably an alkyl group. 5 R is an aliphatic hydrocarbon group having 8 to 18 carbon atoms. 5 From the viewpoint of antibacterial properties, the number of carbon atoms is 8 or more, preferably 10 or more, and 18 or less, preferably 14 or less, and more preferably 12 or less.

[0047] In general formula (2), R 6 and R 7Each of these groups is independently selected from alkyl groups having 1 to 3 carbon atoms and hydroxyalkyl groups having 1 to 3 carbon atoms. 6 and R 7 Each of these is preferably an alkyl group having 1 to 3 carbon atoms. Examples of alkyl groups having 1 to 3 carbon atoms include a methyl group, an ethyl group, and a propyl group. Examples of hydroxyalkyl groups having 1 to 3 carbon atoms include a hydroxymethyl group, a hydroxyethyl group, and a hydroxypropyl group.

[0048] In general formula (2), X - This is an anion. Examples of anions include halide ions, such as chloride ions, bromide ions, and iodide ions. Also, examples of anions include alkyl sulfate ions with 1 to 3 carbon atoms, such as methyl sulfate ions, ethyl sulfate ions, and propyl sulfate ions.

[0049] The compounds represented by general formula (2) are N-octyl-N,N-dimethyl-N-benzylammonium salt, N-decyl-N,N-dimethyl-N-benzylammonium salt, N-dodecyl-N,N-dimethyl-N-benzylammonium salt, N-tridecyl-N,N-dimethyl-N-benzylammonium salt, N-tetradecyl-N,N-dimethyl-N-benzylammonium salt, N-pentadecyl-N,N-dimethyl-N-benzylammonium salt, N-hexadecyl-N,N-dimethyl-N-benzylammonium salt, N-dodecyl-N,N-diethyl-N-benzylammonium salt, N-tridecyl-N,N-diethyl-N-benzylammonium salt, Examples include one or more compounds selected from N-tetradecyl-N,N-diethyl-N-benzylammonium salt, N-pentadecyl-N,N-diethyl-N-benzylammonium salt, N-hexadecyl-N,N-diethyl-N-benzylammonium salt, N-dodecyl-N-methyl-N-ethyl-N-benzylammonium salt, N-tridecyl-N-methyl-N-ethyl-N-benzylammonium salt, N-tetradecyl-N-methyl-N-ethyl-N-benzylammonium salt, N-pentadecyl-N-methyl-N-ethyl-N-benzylammonium salt, and N-hexadecyl-N-methyl-N-ethyl-N-benzylammonium salt.

[0050] The antibacterial agent may be a cationic surfactant other than a quaternary ammonium salt type antibacterial agent. Examples of cationic surfactants other than quaternary ammonium salt type antibacterial agents include alkylamine salts.

[0051] The alkylamine salt is preferably a salt of a secondary or tertiary amine, and more preferably a salt of a tertiary amine. The alkylamine salt has at least one long-chain alkyl group, and preferably a compound having at least one group selected from a long-chain alkyl group, a short-chain alkyl group, and a benzyl group. The number of carbon atoms of the long-chain alkyl group is preferably 10 or more, more preferably 12 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 number of carbon atoms of the short-chain alkyl group is preferably 1 or more, preferably 4 or less, more preferably 1 or 2, and even more preferably 1, i.e., a methyl group. Examples of alkylamine salts include long-chain monoalkylmonomethyl secondary amine salts and long-chain monoalkyldimethyl tertiary amine salts, where the long-chain alkyl group is within the range of the above carbon number. Examples of long-chain monoalkyldimethyl tertiary amine salts include alkylamine acetates such as lauryldimethylamine acetate and stearyldimethylamine acetate.

[0052] Furthermore, chlorhexidine gluconate, polyhexamethylene biguanidine hydrochloride, trichlorocarbanilide, decanoic acid, decenoic acid, 3-hydroxydecanoic acid, and their sodium salts can also be used as antibacterial agents.

[0053] The beneficial substance delivery particles contain the beneficial substance in the particles, preferably at a concentration of 0.1% by mass or more, more preferably 0.5% by mass or more, even more preferably 1.0% by mass or more, and preferably 20% by mass or less, and more preferably 15% by mass or less.

[0054] When beneficial substance delivery particles contain fragrances and fragrance precursors, the total amount of fragrances and fragrance precursors in the particles is preferably 1.0% by mass or more, more preferably 2.0% by mass or more, even more preferably 3.0% by mass or more, even more preferably 5.0% by mass or more, and preferably 20% by mass or less, more preferably 15% by mass or less, even more preferably 10% by mass or less, and even more preferably 8% by mass or less.

[0055] If the beneficial substance delivery particles contain an antioxidant, the antioxidant is preferably contained in the particles at a concentration of 0.05% by mass or more, more preferably 0.10% by mass or more, and preferably 2.0% by mass or less, more preferably 1.5% by mass or less, and even more preferably 1.0% by mass or less.

[0056] If the beneficial substance delivery particles contain an antimicrobial agent, the particles contain the antimicrobial agent in an amount of preferably 0.01% by mass or more, more preferably 0.05% by mass or more, even more preferably 0.1% by mass or more, even more preferably 0.3% by mass or more, and preferably 2.0% by mass or less, more preferably 1.0% by mass or less, even more preferably 0.8% by mass or less, and even more preferably 0.6% by mass or less.

[0057] The beneficial substance delivery particles are not particularly limited, but may be spherical, granular, or powdery, and spherical particles are preferred from the viewpoint of improving fluidity.

[0058] From the viewpoint of improving solubility and handling, the beneficial substance delivery particles may have an average particle size of preferably 1.0 mm or more, more preferably 1.5 mm or more, even more preferably 2.0 mm or more, and preferably 20 mm or less, more preferably 10 mm or less, and even more preferably 5 mm or less. The average particle size can be measured by placing the beneficial substance delivery particles on a glass slide, placing a cover slip on top, obtaining a microscopic image using a microscope (for example, a VHX-5000 digital microscope, manufactured by KEYENCE, with a magnification of 50x), and calculating the equivalent spherical diameter of 250 particles using the image analysis software ImageJ.

[0059] The beneficial substance delivery particles may preferably have a bulk density of 400 g / L or more, more preferably 500 g / L or more, from the viewpoint of volume during use, and preferably 1,000 g / L or less, more preferably 800 g / L or less, from the viewpoint of ease of use during use. The bulk density can be measured using a bulk density meter in accordance with JIS K7365.

[0060] From the viewpoint of imparting a desirable fragrance to textile products, beneficial substance delivery particles may further contain microcapsules (hereinafter also referred to as fragrance-encapsulated microcapsules or fragrance microcapsules) in which fragrance is contained within a shell (sometimes called a casing). The encapsulated fragrance may be one or more selected from the aforementioned fragrance compounds, or it may be a fragrance composition containing two or more. When beneficial substance delivery particles contain fragrance-encapsulated microcapsules, not only beneficial substances but also fragrance from the fragrance-encapsulated microcapsules can be delivered to and adsorbed onto textile products.

[0061] The method for preparing fragrance microcapsules is not particularly limited, and known microencapsulation methods can be employed. Specifically, examples include chemical methods (interfacial polymerization, insitu polymerization, orifice method), physicochemical methods (coacervation method), and mechanical / physical methods (air suspension coating method, spray drying method, high-speed airflow impact method). Examples of outer shells for fragrance microcapsules include various polymer compounds such as polyurethane, polyamide, melamine resin, urea resin, alginate, gelatin, gum arabic, and starch, as well as inorganic compounds such as silica.

[0062] More specifically regarding the method for manufacturing fragrance microcapsules, methods described in "Making and Using Microcapsules" (Masumi Koishi et al., Kogyo Chosakai, published in 2005), and in Japanese Patent Publication Nos. 2008-63575, 2006-249326, 2006-518790, 11-216354, and 5-222672 can be employed. A preferred method for manufacturing fragrance microcapsules is to disperse an emulsifier such as an ethylene-maleic anhydride copolymer, a fragrance, and an optional diluent or solvent in water to obtain an emulsion, and then add a wall material such as melamine-formaldehyde resin to this emulsion and stir to obtain a slurry of fragrance microcapsules. Another method involves first mixing a monomer that will form the resin of the wall material with an emulsifier such as an isobutylene-maleic anhydride copolymer or an acrylic acid-acrylamide copolymer in water to prepare a wall material-emulsifier mixture, then emulsifying this wall material-emulsifier mixture with a fragrance and an optional diluent or solvent, and finally adding formaldehyde to the emulsion and stirring to obtain a slurry of fragrance microcapsules.

[0063] In 100% by mass of the slurry containing fragrance microcapsules obtained by the above-described method for producing fragrance microcapsules, the content of the fragrance compound may be preferably 15% by mass or more, more preferably 18% by mass or more, even more preferably 20% by mass or more, and preferably 50% by mass or less, and more preferably 40% by mass or less.

[0064] Furthermore, it is also possible to use capsules in which a fragrance is encapsulated in a silica shell formed by a sol-gel reaction using an alkoxysilane as a shell precursor as described in Japanese Patent Publication No. 2023-8936. In addition, it is also possible to use capsules in which a fragrance is encapsulated in a shell obtained from a water-soluble monomer or a crosslinkable monomer having two or more (meth)acryloyl groups as described in Japanese Patent Publication No. 2016-534159.

[0065] From the viewpoint of improving the fragrance intensity of the textile product after processing and the fragrance intensity when the textile product is rubbed or otherwise stimulated after drying, the fragrance microcapsules may have an average particle size of preferably 0.1 μm or more, more preferably 1 μm or more, and preferably 50 μm or less, and more preferably 40 μm or less. The average particle size (median diameter) of the fragrance microcapsules can be measured using the laser diffraction / scattering particle size distribution analyzer "LA-950" (manufactured by Horiba, Ltd.).

[0066] If the beneficial substance delivery particles contain fragrance microcapsules, the particles preferably contain fragrance microcapsules in an amount of 0.1% by mass or more, more preferably 0.3% by mass or more, even more preferably 0.5% by mass or more, and preferably 3.0% by mass or less, more preferably 2.0% by mass or less, and even more preferably 1.5% by mass or less.

[0067] The beneficial substance delivery particles of the present invention may optionally contain water-soluble organic polymer compounds from the viewpoint of particle strength and control of particle solubility. Examples of water-soluble organic polymer compounds include one or more selected from water-soluble cationic polymer compounds and water-soluble nonionic polymer compounds.

[0068] In the context of water-soluble organic polymer compounds, water solubility means that the solubility in 100g of water at 80°C is 1g or more. Furthermore, in this invention, it is possible to use water-soluble organic polymer compounds having a melting point exceeding 100°C. In this case, from the viewpoint of ease of formulation, it is necessary to use a water-soluble organic polymer compound whose solubility in water at 80°C is 1g / 100g or more. That is, a water-soluble organic polymer compound having a melting point exceeding 100°C and a solubility in water at 80°C of 1g / 100g or more (hereinafter referred to as component (b22)) is preferable. When using a water-soluble organic polymer compound with a melting point exceeding 100°C, it can be pre-mixed with a water-soluble organic polymer compound with a melting point of 100°C or lower (hereinafter referred to as component (b21)), and can also be used as an aqueous solution of 1% to 30% by mass. The same applies to water solubility and melting points in water-soluble cationic polymer compounds and water-soluble nonionic polymer compounds.

[0069] Specific examples of water-soluble cationic polymer compounds include, for example, polydiallyldimethylammonium chloride and its copolymers such as poly(diallyldimethylammonium chloride), poly(acrylamide-co-diallyldimethylammonium chloride), poly(acrylamide-co-acrylamide-co-diallyldimethylammonium chloride), poly(acrylamide-co-acrylamide-co-diallyldimethylammonium chloride), poly(2-(methacryloyloxy)ethyltrimethylammonium chloride), polyethyleneimine, polyallylamine, cationized cellulose, cationized guar gum, cationized tara gum, cationized fenugreek gum, and cationized locust bing gum. Among these, preferably one or more selected from polydiallyldimethylammonium chloride and its copolymers, poly(diallyldimethylammonium chloride), poly(acrylamide-co-acrylamide-co-diallyldimethylammonium chloride), and poly(acrylamide-co-acrylamide-co-diallyldimethylammonium chloride), and more preferably poly(diallyldimethylammonium chloride).

[0070] From the viewpoint of improving particle strength, the water-soluble nonionic polymer compound is preferably one or more selected from polyethylene glycol (PEG), polypropylene glycol, polyoxyethylene alkyl ether, polyvinyl alcohol, and polyoxyethylene phenol ether, more preferably one or more polyalkylene glycol polymer compounds selected from polyethylene glycol and polypropylene glycol, and even more preferably polyethylene glycol.

[0071] When a polyalkylene glycol polymer compound is used as the water-soluble organic polymer compound, its weight-average molecular weight may be preferably 500 or more, more preferably 2,000 or more, even more preferably 3,000 or more, even more preferably 4,000 or more, and preferably 20,000 or less, more preferably 15,000 or less, and even more preferably 10,000 or less, measured by the GPC method with polystyrene as the standard, from the viewpoint of further increasing the strength of the beneficial substance delivery particles and improving stability such as solubility, suppression of volatilization of the supported beneficial substance during storage, and suppression of leaching. When measuring the molecular weight of polyethylene glycol, water / ethanol is used as the solvent. The weight-average molecular weight of water-soluble nonionic polymer compounds other than water-soluble cationic polymer compounds and polyalkylene glycol polymer compounds is not particularly limited as long as its solubility in water at 80°C is 1 g / 100 g or more; for example, it may be between 500 and 10,000,000. The method for measuring this weight-average molecular weight is the same as described above.

[0072] When the beneficial substance delivery particles of the present invention contain a water-soluble organic polymer compound, the water-soluble organic polymer compound is preferably contained in the particles at a concentration of 0.01% by mass or more, more preferably 0.05% by mass or more, and preferably 30% by mass or less, and more preferably 20% by mass or less, from the viewpoint of fragrance imparted to fibers.

[0073] When the beneficial substance delivery particles of the present invention contain a water-soluble cationic polymer compound, the water-soluble cationic polymer compound is preferably contained in the particles at a concentration of 0.01% by mass or more, more preferably 0.05% by mass or more, and preferably 2.0% by mass or less, and more preferably 1.0% by mass or less, from the viewpoint of particle strength and promoting the adsorption of beneficial substances onto textile products.

[0074] When beneficial substance delivery particles contain a water-soluble nonionic polymer compound, the water-soluble nonionic polymer compound is preferably contained in the particles at a concentration of 0.5% by mass or more, more preferably 1% by mass or more, and preferably 30% by mass or less, and more preferably 20% by mass or less, from the viewpoint of further increasing the strength of the beneficial substance delivery particles, controlling the dissolution rate within the preferred range of the present invention, and improving stability such as suppressing volatilization and leaching of the supported beneficial substance during storage.

[0075] The beneficial substance delivery particles may optionally contain fatty acids or salts thereof having 8 to 20 carbon atoms, from the viewpoint of controlling the dissolution rate within the preferred range of the present invention. The beneficial substance delivery particles may contain one or more types of fatty acids or salts thereof having 8 to 20 carbon atoms. Examples of fatty acid salts having 8 to 20 carbon atoms include alkali metal salts such as sodium salts and potassium salts, alkaline earth metal salts (1 / 2 atom) such as magnesium salts and calcium salts, or organic ammonium salts.

[0076] The number of carbon atoms in the fatty acid having 8 to 20 carbon atoms is 8 or more, preferably 10 or more, more preferably 12 or more, even more preferably 14 or more, and 20 or less, preferably 18 or less, from the viewpoint of controlling the dissolution rate to a preferred range in the present invention. The fatty acid having 8 to 20 carbon atoms may be either a straight-chain fatty acid or a branched-chain fatty acid, with straight-chain fatty acids being preferred. Fatty acids having 8 to 20 carbon atoms or their salts specifically include one or more selected from lauric acid, myristic acid, palmitic acid, and their salts.

[0077] When beneficial substance delivery particles contain fatty acids or salts thereof having 8 to 20 carbon atoms, the particles contain, from the viewpoint of controlling the dissolution rate to a range preferred by the present invention, preferably 0.1% by mass or more, more preferably 1.0% by mass or more, and preferably 30% by mass or less, and more preferably 20% by mass or less.

[0078] The beneficial substance delivery particles may optionally contain an organic solvent from the viewpoint of controlling the dissolution rate within a preferred range of the present invention, promoting the loading of beneficial substances into the pores of the water-soluble solid carrier, suppressing the volatilization of beneficial substances during storage, and suppressing leaching. Examples of organic solvents include one or more selected from methanol, ethanol, ethylene glycol, glycerin, diethylene glycol monoethyl ether, propylene glycol, dipropylene glycol, dipropylene glycol monoethyl ether, 3-methoxy-3-methylbutanol, diethyl phthalate, isopropyl myristate, benzyl myristate, triethyl citrate, diisobutyl adipate, hydrogenated methyl abietate, liquid paraffin, and isoparaffin.

[0079] If the beneficial substance delivery particles contain an organic solvent, the organic solvent is preferably contained in an amount of 0.5% by mass or more, more preferably 1% by mass or more, and preferably 50% by mass or less, and more preferably 30% by mass or less, of the beneficial substance contained in the particles, from the viewpoint of promoting the loading of the beneficial substance into the pores of the water-soluble solid carrier, from the viewpoint of suppressing the volatilization of the beneficial substance during storage, and from the viewpoint of suppressing leaching.

[0080] The beneficial substance delivery particles are preferably particles containing (a) one or more selected from fragrances and fragrance precursors (hereinafter also referred to as (a) component), (b1) a water-soluble inorganic salt (hereinafter also referred to as (b1) component), (b2) a water-soluble organic polymer compound (hereinafter also referred to as (b2) component), and (b3) a fatty acid or salt thereof having 8 to 20 carbon atoms (hereinafter also referred to as (b3) component). Preferred embodiments and specific examples of (a) fragrances and fragrance precursors, (b2) water-soluble organic polymer compounds, and (b3) fatty acids having 8 to 20 carbon atoms or salts thereof are as described above. Furthermore, preferred embodiments and specific examples of (b1) water-soluble inorganic salts are the same as preferred embodiments and specific examples of water-soluble inorganic salts of water-soluble solid carriers.

[0081] If the beneficial substance delivery particles contain component (b1) and optionally component (b2), the mass ratio of the content of component (b2) in the particles to the total content of components (b1) and (b2), which is (b2) / [(b1)+(b2)], is preferably 0.7 or less, more preferably 0.5 or less, even more preferably 0.2 or less, and from the viewpoint of improving efficient delivery to textile products, preferably 0.01 or more, more preferably 0.05 or more, and even more preferably 0.1 or more.

[0082] Furthermore, if the beneficial substance delivery particles contain component (b3), the mass ratio [(b2)+(b3)] / [(b1)+(b2)+(b3)] of the total content of components (b2) and (b3) in the beneficial substance delivery particles to the total content of components (b1), (b2), and (b3) is preferably 0.01 or higher, more preferably 0.05 or higher, and preferably 0.9 or lower, and more preferably 0.8 or lower, from the viewpoint of controlling the dissolution rate to a preferred range of the present invention.

[0083] From the viewpoint of improving the residual fragrance of textile products, the beneficial substance delivery particles preferably include (a) one or more selected from fragrances and fragrance precursors, and fragrance-encapsulated microcapsules. Preferred embodiments and specific examples of the fragrance, fragrance precursor, and fragrance-encapsulated microcapsules are as described above.

[0084] From the viewpoint of improving solubility, the beneficial substance delivery particles preferably contain one or both of a water-soluble solid carrier and a water-soluble nonionic polymer compound. Furthermore, from the viewpoint of improving particle strength, the beneficial substance delivery particles preferably contain a water-soluble nonionic polymer compound as the water-soluble solid carrier. Preferred embodiments and specific examples of water-soluble solid carriers and water-soluble nonionic polymer compounds are as described above.

[0085] The water-soluble solid carrier may be pre-compressed and molded into granules, flakes, or beads, and then dried. The molding method can be any known method. For example, it can be manufactured using compression molding, extrusion granulation, rolling granulation, agitation granulation, or compaction granulation. Among these, molding by compression molding is preferred.

[0086] When compressing a water-soluble solid carrier, the manufacturing machine used is not limited as long as it can produce briquettes or tablets, and well-known briquetting machines, tablet presses, etc., can be used. A briquetting machine is a device that continuously compresses granules between two rolls, each with a pocket on its outer circumference that serves as the mold for the desired compressed material, which bites into each other and rotates at the same speed. Well-known briquetting machines include briquetting machines [manufactured by Shinto Kogyo Co., Ltd.]. A tablet press is a device that fills a die with granules and compresses and forms them between a lower punch and an upper punch. Tablet presses include single-shot tablet presses, in which a pair of upper and lower punches move up and down within a single die to compress, and rotary tablet presses, in which dies are embedded at equal intervals around the outer circumference of a horizontally rotating turntable, and a series of operations of filling, compressing, and discharging are performed continuously while the turntable rotates. As for well-known tablet presses, Riken-made tablet presses can be used for single-shot tablet presses, and Kikusui Chemical Co., Ltd.'s tablet presses can be used for rotary tablet presses.

[0087] When molding by methods other than compression molding, well-known extrusion granulators such as Pelletter Double, Dome Gran, Twin Dome Gran, Disc Pelletter (manufactured by Dalton Co., Ltd.), and Basket-type granulator (manufactured by Kikusui Seisakusho Co., Ltd.), as well as rolling granulators, can be used. Furthermore, the granules can be sized after molding as needed. As the machine used for sized granules, well-known crushers (or pulverizers) can be used, such as Marmelizer (manufactured by Dalton Co., Ltd.), Fitsmill (manufactured by Dalton Co., Ltd.), Powermill (manufactured by Powrec Co., Ltd.), and Cormill (manufactured by Quadro).

[0088] In one form, beneficial substance delivery particles can be manufactured by mixing a water-soluble solid carrier with a beneficial substance. Alternatively, from the viewpoint of suppressing the volatilization of the beneficial substance and improving its stability, beneficial substance delivery particles can be prepared by mixing a mixture obtained by mixing a water-soluble solid carrier with a beneficial substance with other optional components. The preferred mass ratio of the water-soluble solid carrier to the beneficial substance can be the same as that of the beneficial substance delivery particles of the present invention described above.

[0089] The water-soluble solid carrier, beneficial substance, and optional components can be mixed in a substantially uniform manner. The mixer is not particularly limited as long as it can be mixed in a substantially uniform manner, and may include a mixer with a heating means. Examples include drum mixers, ribbon mixers, Nauter mixers, V-type blenders (manufactured by Paulex Co., Ltd.), double-cone mixers (manufactured by Tokuju Kogyosho Co., Ltd.), and ribbon blenders (manufactured by Hosokawa Micron Corporation), and container-rotating granulators (manufactured by Sugiyama Heavy Industries Co., Ltd.).

[0090] The beneficial substance delivery particles can be applied in the washing process of textile products. That is, the present invention can provide a method for fragrance-adding textile products by adding the beneficial substance delivery particles to the textile products during the washing process.

[0091] When beneficial substance delivery particles are added during the washing process of textile products, the amount of beneficial substance delivery particles added may be preferably 5.0 g or more, more preferably 7.0 g or more, and preferably 10.0 g or less, and more preferably 8.0 g or less, per 1 kg of textile product.

[0092] When adding beneficial substance delivery particles to the washing process of textile products, the beneficial substance delivery particles can be added to at least one of the washing water and rinse water, or the beneficial substance delivery particles of the present invention can be added to both the washing water and rinse water.

[0093] When adding beneficial substance-delivering particles to the washing process of textile products, a method of adding them to water is preferred at a concentration of 0.001 ppm or more, more preferably 0.01 ppm or more, and preferably 2,000 ppm or less, and more preferably 1,000 ppm or less. From the viewpoint of ease of use when adding to a washing machine, it is preferable to use the beneficial substance-delivering particles in the wash water, but it is also possible to add them in the rinse water. The concentration of beneficial substance delivery particles during the process of the present invention may be within the preferred range described above.

[0094] <Detergent composition> The detergent composition may be a composition containing (c) a surfactant [hereinafter referred to as component (c)]. (c) The component may be one or more selected from anionic surfactants, nonionic surfactants, cationic surfactants, and amphoteric surfactants, from the viewpoint of improving cleaning power, with one or more selected from anionic surfactants and nonionic surfactants being preferred.

[0095] (c) The nonionic surfactant of component (c) can be one or more selected from alkyl monoglyceryl ethers, polyoxyalkylene monoalkyl or alkenyl ethers, polyoxyalkylene fatty acid esters, sorbitan-based nonionic surfactants, aliphatic alkanolamides, fatty acid monoglycerides, alkyl (poly)glycosides (glycoside-type nonionic surfactants), and sucrose fatty acid esters. The nonionic surfactant of component (c) is preferably polyoxyalkylene alkyl or alkenyl ether. The polyoxyalkylene alkyl or alkenyl ether is preferably a polyoxyalkylene alkyl or alkenyl ether in which the alkyl or alkenyl group has 10 to 18 carbon atoms, the alkylene group of the polyoxyalkylene group is one or more groups selected from ethylene and propylene, the average number of added moles of oxyalkylene groups is 3 to 30, and if it contains ethylene and propylene groups, the oxyethylene and oxypropylene groups may be randomly bonded or block-bonded.

[0096] (c) The anionic surfactant of component (c) is preferably one or more selected from alkyl sulfates, alkenyl sulfates, polyoxyalkylene alkyl ether sulfates, polyoxyalkylene alkenyl ether sulfates, alkylbenzene sulfonic acid, alkenylbenzene sulfonic acid, alkane sulfonic acid, α-olefin sulfonic acid, internal olefin sulfonic acid, alkyl or dialkyl sulfosuccinic acid, alkenyl or dialkenyl sulfosuccinic acid, polyoxyalkylene alkyl or polyoxyalkylenedialkyl sulfosuccinic acid, polyoxyalkylene alkenyl or polyoxyalkylenedialkenyl sulfosuccinic acid, alkyl succinic acid, alkenyl succinic acid, fatty acids, and salts thereof. The alkyl sulfate ester is preferably an alkyl sulfate ester having an alkyl group with 10 to 16 carbon atoms. In polyoxyalkylene alkyl ether sulfate esters, the alkyl group is preferably an alkyl group having 10 to 16 carbon atoms, the alkylene group of the polyoxyalkylene group is preferably one or more selected from ethylene and propylene groups, the average number of added moles of oxyalkylene groups is preferably 0.5 to 5, and if the polyoxyalkylene group includes oxyethylene and oxypropylene groups, the oxyethylene and oxypropylene groups may be randomly bonded or block-bonded. Alkylbenzenesulfonic acid is preferably an alkylbenzenesulfonic acid having an alkyl group with 8 to 18 carbon atoms. Examples of salts of anionic surfactants include alkali metal salts such as sodium salts and potassium salts, alkaline earth metal salts (half an atom) such as magnesium salts and calcium salts, or organic ammonium salts. More preferably, the salt of the anionic surfactant is an alkali metal salt such as sodium salt and potassium salt, or an alkanol ammonium salt such as monoethanolammonium salt or diethanolammonium salt, and even more preferably a sodium salt.

[0097] (c) The cationic surfactant of component (c) can be one or more selected from alkyltrimethylammonium salts having 8 to 22 carbon atoms in the alkyl group, dialkyldimethylammonium salts having 8 to 22 carbon atoms in the alkyl group, alkyldimethylbenzylammonium salts having 8 to 22 carbon atoms in the alkyl group, or benzethonium salts. Examples of these salts include halogenated salts such as chloride salts and alkyl sulfates having 1 to 3 carbon atoms.

[0098] Examples of the amphoteric surfactants in component (c) include N-alkanoylaminopropyl-N,N-dimethylamine oxide, N-alkyl-N,N-dimethylamine oxide, N-alkanoylaminopropyl-N,N-dimethyl-N-carboxymethylammonium betaine, N-alkyl-N,N-dimethyl-N-carboxymethylammonium betaine, N-alkyl-N,N-dimethyl-N-sulfopropylammonium sulfobetaine, N-alkyl-N,N-dimethyl-N-(2-hydroxysulfopropyl)ammonium sulfobetaine, N-alkanoylaminopropyl-N,N-dimethyl-N-sulfopropylammonium sulfobetaine, and N-alkanoylaminopropyl-N,N-dimethyl-N-(2-hydroxysulfopropyl)ammonium sulfobetaine. In these, the alkanoyl group is, for example, lauroyl or myristyl. In these, the alkyl group is, for example, a lauryl group or a myristyl group.

[0099] The detergent composition of the present invention contains component (c) in an amount of preferably 5% by mass or more, more preferably 10% by mass or more, even more preferably 15% by mass or more, and even more preferably 20% by mass or more, from the viewpoint of improving cleaning power, and preferably 90% by mass or less, more preferably 70% by mass or less, and even more preferably 50% by mass or less, from the viewpoint of improving stability.

[0100] If the detergent composition and component (c) contain an anionic surfactant, the provisions regarding the mass of the anionic surfactant shall use the value converted to the sodium salt. Furthermore, if the detergent composition and component (c) contain a cationic surfactant, the provisions regarding the mass of the cationic surfactant shall use the value converted to a chloride salt.

[0101] The detergent composition of the present invention may optionally contain water. For example, ion-exchanged water, tap water, purified water, or water containing 0.1 mg / kg to 3 mg / kg of sodium hypochlorite can be used. The water is used as the remainder of the detergent composition, excluding component (c) and other optional components, in an amount such that the composition of the detergent composition becomes 100% by mass.

[0102] From the viewpoint of improving cleaning power, the detergent composition is mixed such that the concentration in the treatment solution of the present invention is preferably 50 ppm or more, more preferably 100 ppm or more, even more preferably 150 ppm or more, and even more preferably 200 ppm or more, and from the viewpoint of improving fragrance imparted to textile products, it is preferably 3,000 ppm or less, more preferably 2,000 ppm or less, and even more preferably 1,500 ppm or less.

[0103] (c) The component is mixed such that, from the viewpoint of improving cleaning power, its concentration in the treatment solution of the present invention is preferably 50 ppm or more, more preferably 100 ppm or more, even more preferably 150 ppm or more, and even more preferably 200 ppm or more, and from the viewpoint of suppressing foaming, it is preferably 1,000 ppm or less, more preferably 800 ppm or less, and even more preferably 600 ppm or less.

[0104] <Water> The water used can be deionized water, tap water, purified water, or water containing 0.1 mg / kg to 3 mg / kg of sodium hypochlorite.

[0105] From the viewpoint of more effectively enjoying the effects of the present invention, the treatment solution is prepared by mixing water in a ratio of 15 parts by mass or less, preferably 10 parts by mass or less, more preferably 5 parts by mass or less, preferably 1 part by mass or more, more preferably 2 parts by mass or more, and even more preferably 3 parts by mass or more, per 1 part by mass of the textile product to be washed. The ratio of parts by mass of water to 1 part by mass of textile product is also called the bath ratio.

[0106] [Step 2: Washing Process] Step 2 is the step of washing the textile product with the treatment solution prepared in Step 1. The treatment solution of the present invention may contain the beneficial substance delivery particles, the detergent composition, and water. The treatment solution of the present invention may be a treatment solution obtained by mixing the beneficial substance delivery particles, the detergent composition, and water. In Step 2, washing may be done using a rotary washing machine, by hand washing, or by soaking, but from the viewpoint of improving work efficiency, it is preferable to use a rotary washing machine. Examples of rotary washing machines include top-loading washing machines, twin-tub washing machines, front-loading washing machines, pulsator-type washing machines, and agitator-type washing machines. Each of these rotary washing machines can be commercially available for home use.

[0107] The treatment solution of the present invention can be prepared by dissolving the aforementioned beneficial substance delivery particles and detergent composition in water within a washing machine tub. The preferred concentrations of the beneficial substance delivery particles, detergent composition, and component (c) in the processing solution of the present invention may be the preferred concentrations in the preferred mode of use of the beneficial substance delivery particles, detergent composition, and component (c).

[0108] From the viewpoint of improving cleaning performance, the temperature of the processing solution is preferably 0°C or higher, more preferably 3°C or higher, even more preferably 5°C or higher, and preferably 40°C or lower, more preferably 35°C or lower, and even more preferably 30°C or lower.

[0109] From the viewpoint of improving cleaning performance, the washing time is preferably 1 minute or more, more preferably 2 minutes or more, even more preferably 3 minutes or more, and preferably 30 minutes or less, more preferably 20 minutes or less, and even more preferably 15 minutes or less. Washing time refers to the time during which the treatment liquid of the present invention is in contact with the textile product.

[0110] The present invention provides a method for washing textile products, which involves contacting the textile products with the treatment solution of the present invention for washing, and then optionally performing one or more of the following steps in combination: a dewatering step, a rinsing step, and a drying step.

[0111] [Dehydration process] In the present invention's method for washing textile products, a dewatering step can be performed after the step of washing the textile product by bringing the treatment solution of the present invention into contact with the textile product. The dewatering step is a step in the present invention's method for washing textile products that reduces the amount of treatment solution present with the textile product. Performing the dewatering step shortens the drying time described later and makes the textile product suitable for wear. The dehydration process can be carried out using a rotary washing machine.

[0112] [Rinsing process] In the present invention's method for washing textile products, a rinsing step may be performed after the step of washing the textile products by bringing the treatment solution of the present invention into contact with them, or after the dewatering step of dewatering the textile products. In the present invention, the rinsing step refers to the step of reducing the amount of the treatment solution of the present invention carried over with the textile products by bringing the textile products obtained in the washing step into contact with fresh water. The rinsing step can be performed multiple times in conjunction with the dewatering step. The rinsing process can be carried out using a rotary washing machine.

[0113] [Drying process] In the present invention's method for washing textile products, a drying step may be performed after the washing, dewatering, and rinsing steps to dry the textile products. The drying process is a process that reduces the amount of water present in the textile product. Drying can be done by natural drying or by heating using a dryer. Each drying process can be performed multiple times. The drying process can be carried out using a rotary heating dryer.

[0114] <Textile products> The textile products to which the present invention's method for cleaning textile products applies may be either textile products using hydrophobic fibers or textile products using hydrophilic fibers. 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 (vinylidene, etc.), polyolefin-based fibers (polyethylene, polypropylene, etc.), polyurethane-based fibers (polyurethane, etc.), polyvinyl chloride / polyvinyl alcohol copolymer-based fibers (Polycloral, etc.), polyalkylene paraoxybenzoate-based fibers (benzoate, etc.), polyfluoroethylene-based fibers (polytetrafluoroethylene, etc.), glass fibers, carbon fibers, alumina fibers, silicone carbide fibers, rock fibers, slag fibers, metal fibers (gold thread, silver thread, steel fiber), etc. Examples of hydrophilic fibers include seed hair fibers (cotton, kapok, etc.), bast fibers (hemp, flax, ramie, cannabis, jute, etc.), leaf vein fibers (Manila hemp, sisal, etc.), coconut fibers, rush, straw, animal hair fibers (wool, mohair, cashmere, camel hair, alpaca, vicuña, angora, etc.), silk fibers (domestic silk, wild silk), feathers, and cellulose fibers (rayon, polynosic, cupro, acetate, etc.). These fibers are preferably cotton fibers, from the viewpoint of improving the finish. The cotton fiber content in the fibers is preferably 5% by mass or more, more preferably 10% by mass or more, even more preferably 15% by mass or more, even more preferably 20% by mass or more, even more preferably 40% by mass or more, even more preferably 60% by mass or more, even more preferably 80% by mass or more, and preferably 100% by mass or less, and may be 100% by mass.

[0115] Textile products include, for example, woven fabrics, knitted fabrics, nonwoven fabrics, and other fabrics made using the aforementioned fibers, as well as products such as undershirts, T-shirts, dress shirts, blouses, slacks, hats, handkerchiefs, towels, knitwear, socks, underwear, tights, and masks obtained using the same.

[0116] [Textile Cleaning Kit] In an exemplary embodiment, the present invention provides a kit for washing textile products, comprising the beneficial substance delivery particles and a detergent composition in an unmixed state. Specific examples and preferred examples of beneficial substance delivery particles and detergent compositions in the textile product cleaning kit of the present invention are as described above.

[0117] The amount of beneficial substance delivering particles constituting the textile product cleaning kit of the present invention may be, for example, an amount that can come into contact with the textile product in the aforementioned range, and the amount of detergent composition may be an amount that can prepare a treatment solution that can clean the textile product into contact with the beneficial substance delivering particles, containing the detergent composition in the aforementioned range and in a bath ratio within the aforementioned range.

[0118] The beneficial substance delivery particles are brought into contact with the textile product in step 1 or step 2, and the detergent composition is diluted with water in step 1 or step 2 to prepare the treatment solution. The textile product cleaning kit of the present invention is suitably used for cleaning textile products. [Examples]

[0119] The components used in the examples and comparative examples are summarized below. The physical properties of each component in the examples and comparative examples were measured using the following method.

[0120] (1) Dissolution rate (mass%) of beneficial substance delivery particles <Solubility Test> 1 liter of tap water (Wakayama City water, the same applies to the tap water used in the following examples) warmed to 5°C was added to a 1 liter glass beaker, and the mixture was stirred with a magnetic stirrer (4 cm diameter round stirring bar, manufactured by Cowie Technology Group, model number 001.1140.1, 600 rpm), and 1 g of beneficial substance delivery particles was added. After 1 or 5 minutes had elapsed since adding the beneficial substance delivery particles, the sample (tap water containing the beneficial substance delivery particles) was filtered through a 200-mesh filter (manufactured by Hayashi Fukuzo Shoten, HYF110-200MS), and the remaining sample along with the filter was dried in an electric dryer set to 60°C for 2 hours. The mass of undissolved beneficial substance delivery particles after drying was calculated based on the mass of the filter after drying. <Dissolution rate> The dissolution rate was calculated based on the following formula (1). Dissolution rate (mass%) = 100 - [(Mass of beneficial substance delivery particles after drying of undissolved material after 1 or 5 minutes) / (Mass of added beneficial substance delivery particles)] × 100 (1)

[0121] (2) Bulk density The bulk density was calculated using a bulk density meter in accordance with JIS K7365.

[0122] (3) Average particle size of beneficial substance delivery particles The beneficial substance delivery particles were placed on a glass slide, a cover slip was placed on top, and microscopic images were obtained using a microscope (e.g., VHX-5000 digital microscope, KEYENCE, 50x magnification). The spherical equivalent diameter of 250 particles was then calculated using the image analysis software ImageJ.

[0123] <Ingredients used> (a) component Fragrance: Fragrance composed of the fragrance compounds shown in Table 1 below.

[0124] [Table 1]

[0125] • Fragrance-encapsulated microcapsules: Microcapsule slurry obtained in the manufacturing example below. (1) Example of manufacturing a microcapsule slurry 1.7 g of diisobutylene-maleic anhydride copolymer (Demol EP, 25% solids, Kao Corporation) was neutralized with hydrochloric acid and then diluted with deionized water to obtain an aqueous solution with a solids content of 3% and a pH of 4.3. Next, 36 g of fragrance composed of the fragrance compounds shown in Table 2 below was added to 100 g of the diisobutylene-maleic anhydride copolymer aqueous solution, emulsified using a homomixer, and heated to 50°C. Then, an aqueous solution of 12 g of partially methylolated melamine resin (trade name Cyme1385, 80% solids, manufactured by Cytec Industries Inc.) and 35 g of deionized water was added dropwise. This was held at 50°C for 2 hours, then at 70°C for 1 hour, and then at 80°C for 3 hours to complete the encapsulation. After this, it was allowed to cool to obtain a microcapsule slurry with an average particle size of 7 μm and an effective content of 30% by mass (25% by mass of fragrance compounds). The average particle size (median diameter) of fragrance-encapsulated microcapsules was measured using a laser diffraction / scattering particle size distribution analyzer "LA-950" (manufactured by Horiba, Ltd.). A flow cell was used for the measurement, and water was used as the dispersion medium. The refractive index was set to 1.333-i for the dispersion medium and 1.48-0i for the dispersed phase. The dispersion containing the particles to be measured was added to the flow cell, and the measurement was performed at a concentration that showed a transmittance of approximately 90%, and the average particle size (median diameter) was determined.

[0126] [Table 2]

[0127] ·(b1) component Magnesium sulfate: Magnesium sulfate heptahydrate ·(b2) component PEG1: Polyethylene glycol, weight-average molecular weight 8,500, manufactured by Fujifilm Wako Pure Chemical Industries, Ltd. PEG2: Polyethylene glycol, weight-average molecular weight 3,000, manufactured by Fujifilm Wako Pure Chemical Industries, Ltd. ·(c) Component Nonionic surfactant: Polyoxyethylene lauryl ether (average ethylene oxide addition moles: 10 moles) ES: Sodium polyoxyethylene(2) lauryl ether sulfate LAS: Sodium dodecylbenzenesulfonate • Water: Ion-exchanged water

[0128] <Preparation of beneficial substance delivery particles> The beneficial substance delivery particles with the compositions shown in Table 3 were prepared by the following methods. In Table 3, the content of each component represents the amount of the active ingredient. Furthermore, the content of the fragrance-encapsulated microcapsules refers to the amount of fragrance contained in the fragrance-encapsulated microcapsule slurry, and the water and microcapsule content in the slurry, as well as the water contained in component (b2), were included in the content of other components. First, 500 g of magnesium sulfate heptahydrate was weighed into a stainless steel tray, and five trays were placed in an Advantec Toyo DRM620TE forced-air constant-temperature dryer and dried at 120°C for 2 hours. The dried magnesium sulfate heptahydrate had an infrared meter reading of 1.69% by mass and a bulk density of 510 g / L (hereinafter referred to as component (b1)). Component (b1) (solid temperature of component (b1) 50°C) was placed in a 75 L drum-type granulator (φ40 cm × L60 cm) equipped with baffles, in the composition shown in Table 3. While mixing under conditions of a Froude number of 0.118 / drum angle of 12.6°, (a) fragrance was added via piping in the amount shown in Table 3 and mixed for 30 seconds (mixture temperature 25°C, addition time 30 seconds, particle solid temperature after addition 45°C). Furthermore, a mixture of fragrance-encapsulated microcapsules and (b2) polyethylene glycol was added via piping in the amounts shown in Table 3 and mixed for 3 minutes and 30 seconds (mixture temperature 60°C, addition time 30 seconds, particle solid temperature after addition 45°C). The batch size was 6.5 kg (total amount blended). The obtained beneficial substance-delivering particles had component (a) supported on component (b1). The obtained beneficial substance-delivering particles had an average particle size of 4 mm and a bulk density of 635 g / L.

[0129] <Preparation of detergent composition> In a 200 mL beaker, deionized water was added to bring the total volume to 120 g. Then, component (c) was added to the 200 mL beaker and dissolved uniformly, followed by stirring for 10 minutes.

[0130] <How to wash textile products> (1) Process 1 In a fully automatic washing machine (Toshiba Corporation, AW-10GM), cotton T-shirts (Gunze Corporation, white, 100% cotton) were stacked in the height direction of the washing tub to a total weight of 5.6 kg or 2.8 kg. 21 g of beneficial substance delivery particles were then sprinkled onto the topmost T-shirt. The top and bottom T-shirts were marked. Next, 28 liters of tap water (20°C) and the detergent composition were added to the washing tub of a fully automatic washing machine to prepare a treatment solution with the concentrations shown in Table 3. The amount of water added (parts by mass) per part by mass of a T-shirt is shown in the bath ratio column of Table 3. (2) Process 2 Then, the T-shirts placed in the washing tub were washed in a fully automatic washing machine (10 minutes of washing - 2 rinses - 4 minutes of spinning) using the treatment solution prepared in step (1).

[0131] <Evaluation of remaining undissolved material> After the washing process was completed and before drying, the T-shirts were visually inspected for any undissolved residue and evaluated according to the following criteria. [Evaluation Criteria] ○: No undissolved residue ×: There are undissolved particles.

[0132] <Evaluation of uneven fragrance> After washing, T-shirts were dried indoors (temperature 25°C, humidity 65%RH) for one day, and the fragrance intensity of each T-shirt, folded to a size of 30cm x 20cm, was evaluated according to the following evaluation criteria. Then, fragrance unevenness was calculated using the formula (2) below, and based on the calculated fragrance unevenness, the fragrance unevenness between the upper and lower T-shirts was evaluated. A fragrance unevenness value of 0.7 to 1.3 indicates that the treatment is considered to have little unevenness between the upper and lower T-shirts, and the closer the fragrance unevenness value is to 1, the less uneven the fragrance intensity is between the upper and lower T-shirts. Fragrance unevenness = (Fragrance intensity of upper T-shirt) ÷ (Fragrance intensity of lower T-shirt) (2) The fragrance intensity was evaluated by three expert panelists, each scoring according to the following criteria. The average of the panelists' scores was used as the fragrance intensity evaluation result. A higher number indicates a stronger fragrance. [Criteria for evaluating fragrance intensity] 0 points: Odorless 1 point: Very slight feeling 2 points: Feels weak 3 points: Clearly felt 4 points: I feel it strongly. 5 points: I feel it quite strongly.

[0133] [Table 3]

[0134] [Example prescription] Tables 4-7 show examples of formulations for the beneficial substance delivery particles of the present invention. These beneficial substance delivery particles contain beneficial substance delivery particles, a detergent composition, and water. Even when washing is performed with a treatment solution in which the water is mixed at a ratio of 15 parts by mass or less of water per 1 part by mass of the textile product to be washed, the beneficial substances can be uniformly delivered to the washed textile product, and any undissolved beneficial substance delivery particles during the washing process can be suppressed.

[0135] In Tables 4-7, the ingredients used other than those listed above are as follows: <(b2) component> (b21) component • PEG2: Polyethylene glycol, weight-average molecular weight 3,000, melting point 56-59°C, manufactured by Fujifilm Wako Pure Chemical Corporation. (b22) component • Merquart: Dimethyldiallyl ammonium chloride / acrylamide copolymer = 50 / 50 (mass ratio), Merquart 550, manufactured by Lubrizol Advanced Materials, Inc., weight-average molecular weight 1.6 million, cation charge density 5.2 meq / g • PVA1: Polyvinyl alcohol, weight-average molecular weight 1,500, melting point 300°C or higher, solubility in hot water 10g / 100g or higher (80°C), manufactured by Fujifilm Wako Pure Chemical Industries, Ltd., (b22) component • PVA2: Polyvinyl alcohol, weight-average molecular weight 500, melting point 300°C or higher, solubility in hot water 20g / 100g or higher (80°C), manufactured by Fujifilm Wako Pure Chemical Industries, Ltd. <(b3) component> Palmitic acid <Other ingredients> • Antimicrobial agent 1: N-myristyl-N,N-dimethyl-N-ethylammonium ethyl sulfate • Antimicrobial agent 2: N,N-didecyl-N-methyl-N-ethylammonium ethyl sulfate • Antioxidant: Dibutylhydroxytoluene (BHT, the butyl group is a tertiary butyl group), manufactured by Fujifilm Wako Pure Chemical Corporation.

[0136] [Preparation of beneficial substance delivery particles] The beneficial substance delivery particles of the present invention, as described in Tables 4-7, were prepared by the following methods 1-4.

[0137] ·Method 1 Half of component (b1) was mixed with component (a), component (b2) which had been melted at 80°C beforehand, and fragrance-encapsulated microcapsules. Then, half of the remaining component (b1) was added, followed by the addition of 0.20% by mass of antibacterial agent 1, 0.20% by mass of antibacterial agent 2, and 0.70% by mass of antioxidant, which were then mixed and allowed to stand at room temperature for 1 day to stabilize. After that, beneficial substance delivery particles with the formulations listed in Table 4 were prepared by dropping them using a dropper and allowing them to stand at room temperature for 1 day to stabilize. The obtained beneficial substance delivery particles had an average particle size of 4 mm and a bulk density of 635 g / L.

[0138] ·Method 2 (b1) Half of component (a) was added and mixed. Then, half of the remaining (b1) was added, followed by the addition of an aqueous solution of component (b2) (10-20% by mass) mixed with fragrance-encapsulated microcapsules. The mixture was then left to stand at room temperature for one day to stabilize, thereby preparing beneficial substance delivery particles with the formulations listed in Table 5. Each of the obtained beneficial substance delivery particles had an average particle size of 4 mm and a bulk density of 635 g / L.

[0139] ·Method 3 (b1) Half of component (a) was added and mixed. Then, half of the remaining (b1) was added, followed by the addition of components (b2), (b3), and fragrance-encapsulated microcapsules, which had been pre-mixed while heating at 80°C, and the mixture was combined. The mixture was then left to stand at room temperature for 1 day to stabilize, thereby preparing the beneficial substance delivery particles for each formulation listed in Table 6. The obtained beneficial substance delivery particles had an average particle size of 4 mm and a bulk density of 635 g / L.

[0140] ·Method 4 (a) component was mixed with (b2) component and fragrance-encapsulated microcapsules that had been pre-melted at 80°C. Then, 0.10% by mass of antibacterial agent 1, 0.10% by mass of antibacterial agent 2, and 0.20% by mass of antioxidant were added to the particles as other components and mixed, and the mixture was allowed to stand at room temperature for 1 day to stabilize. After that, beneficial substance delivery particles with the formulations listed in Table 7 were prepared by dropping them using a dropper or the like and allowing them to stand at room temperature for 1 day to stabilize. The obtained beneficial substance delivery particles had an average particle size of 4 mm and a bulk density of 635 g / L.

[0141] [Evaluation of solubility of beneficial substance delivery particles] For the beneficial substance delivery particles of the formulation examples listed in Tables 4-7, the dissolution rate of each beneficial substance delivery particle was measured 1 minute and 5 minutes after adding tap water, using the method described in the above examples. The results are shown in Tables 4-7.

[0142] [Table 4]

[0143] [Table 5]

[0144] [Table 6]

[0145] [Table 7]

[0146] In Tables 4-7, the content of fragrance-encapsulated microcapsules refers to the content of fragrance contained in the fragrance-encapsulated microcapsule slurry. The water and microcapsule content in the slurry, as well as the water contained in component (b2), are included in the water (remainder) content.

Claims

1. A method for washing textile products, comprising: preparing a treatment solution by mixing beneficial substance delivery particles containing beneficial substances, having a dissolution rate of 20% by mass or more and 70% by mass or less after 1 minute and a dissolution rate of 70% by mass or more after 5 minutes in the following solubility test, a detergent composition, and water, in a mixing ratio of water to be washed of 15 parts by mass or less of water per 1 part by mass of the textile product to be washed; and washing the textile product with the treatment solution. <Solubility Test> Add 1 liter of water warmed to 5°C to a 1 liter glass beaker, stir with a magnetic stirrer (round stirring bar with a diameter of 4 cm, 600 rpm), and add 1 g of beneficial substance delivery particles. After 1 or 5 minutes have elapsed since adding the beneficial substance delivery particles, filter the sample together with the water through a 200-mesh filter, dry the remaining sample with the filter in an electric dryer set to 60°C for 2 hours, calculate the mass of undissolved beneficial substance delivery particles after drying based on the mass of the filter after drying, and calculate the solubility using the following formula (1). Dissolution rate (mass%) = 100 - [(Mass of beneficial substance delivery particles remaining undissolved after 1 or 5 minutes and after drying) / (Mass of added beneficial substance delivery particles)] × 100 (1)

2. The method for washing textile products according to claim 1, wherein the beneficial substance delivery particles are particles containing component (a) and one or more selected from components (b1), (b2), and (b3) below. (a) Ingredients: One or more selected from fragrances and fragrance precursors. (b1) Components: Water-soluble inorganic salt (b2) Component: water-soluble organic polymer compound (b3) Components: Fatty acids with 8 to 20 carbon atoms or their salts

3. The method for washing textile products according to claim 2, wherein the beneficial substance delivery particles contain component (b1) and optionally component (b2), and the mass ratio of the content of component (b2) to the total content of component (b1) and component (b2), which is (b2) / [(b1) + (b2)], is 0.7 or less.

4. The method for washing textile products according to claim 1 or 2, wherein the average particle size of the beneficial substance delivery particles is 1.0 mm or more and 20 mm or less.

5. The method for washing textile products according to claim 1 or 2, wherein the beneficial substance delivering particles are fragrance delivering particles.

6. Furthermore, the method for washing textile products according to claim 1 or 2, further comprising rinsing the textile products after washing.

7. Furthermore, the method for washing textile products according to claim 1 or 2, further comprising drying the textile products after washing.

8. A beneficial substance delivery particle containing the following component (a) and one or more components selected from the following components (b1), (b2), and (b3), wherein the dissolution rate after 1 minute in the following solubility test is 20% by mass or more and 70% by mass or less, and the dissolution rate after 5 minutes is 70% by mass or more. (a) Ingredients: One or more selected from fragrances and fragrance precursors. (b1) Components: Water-soluble inorganic salt (b2) Component: water-soluble organic polymer compound (b3) Components: Fatty acids with 8 to 20 carbon atoms or their salts <Solubility Test> Add 1 liter of water warmed to 5°C to a 1 liter glass beaker, stir with a magnetic stirrer (round stirring bar with a diameter of 4 cm, 600 rpm), and add 1 g of beneficial substance delivery particles. After 1 or 5 minutes have elapsed since adding the beneficial substance delivery particles, filter the sample together with the water through a 200-mesh filter, dry the remaining sample with the filter in an electric dryer set to 60°C for 2 hours, calculate the mass of undissolved beneficial substance delivery particles after drying based on the mass of the filter after drying, and calculate the solubility using the following formula (1). Dissolution rate (mass%) = 100 - [(Mass of beneficial substance delivery particles remaining undissolved after 1 or 5 minutes and after drying) / (Mass of added beneficial substance delivery particles)] × 100 (1)

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