Cleaning agent article

Abstract

The cleaning agent article is formed by packaging a powder cleaning agent composition containing the following components (a), (b), (c) and (d) in a water-soluble film, and the pH value of a dispersion liquid at 20 DEG C, which is obtained by dispersing the cleaning agent article with water such that the concentration of the powder cleaning agent composition contained in the cleaning agent article is 0.029 mass%, is 9.0 or less. Component (a): a surfactant. Component (b): an acid agent, the pH value of a mixed solution obtained by dispersing or dissolving 1 g of the acid agent in 1000 g of water being 9.0 or less at 20 DEG C, and the mass increase rate exceeding 1 mass% after the mixed solution is left to stand for 24 hours under environmental conditions at 30 DEG C and 70% humidity; component (c): a non-hygroscopic particle group having a mass increase rate of less than 1 mass% after being left to stand for 24 hours under environmental conditions at a temperature of 30 DEG C and a humidity of 70%; component (d): a diphenyl ether compound.

Description

Technical Field

[0001] The present invention relates to a detergent article formed by packaging a powder detergent composition in a water-soluble film. Background Art

[0002] In recent years, as people's preference for convenience has increased, there is a need for easier-to-use cleaning products. From the perspective of improving the usability of cleaning compositions, a technology related to containers for cleaning compositions has been disclosed, for example, a cleaning product in which the cleaning composition is packaged in a water-soluble film.

[0003] Meanwhile, as people become more aware of hygiene, concerns about bacteria and bacterial odors on textile products such as clothing are growing. Skin-resident bacteria and various bacteria present in the environment are known to attach and multiply on clothing, creating a need for technologies to combat or sterilize textile products such as clothing.

[0004] Japanese Patent Application Laid-Open No. 2022-90305 discloses a powdered bleaching article comprising a powdered bleaching composition enclosed in a container formed of a water-soluble film laminated with water-soluble fibers. The powdered bleaching composition comprises (A) a peroxide that generates hydrogen peroxide when dissolved in water, (B) one or more compounds selected from a bleach activator of a specific structure and tetraacetylethylenediamine, (C) an inorganic alkaline agent, and (D) an organic acid.

[0005] Japanese Patent Publication No. 2017-511392 discloses a consumer product composition comprising: (a) a water-soluble organic photoactivator; (b) an electron acceptor that receives electrons from the photoactivator when the photoactivator is in a photoexcited state and / or a reduced state; and (c) a precursor of a beneficial active agent that is converted into the beneficial active agent through electron transfer.

[0006] Japanese Patent Laid-Open No. 2018-44092 discloses a cleaning composition for an automatic cleaning machine, comprising: (a) at least one compound selected from an alkylene oxide adduct of a specific polyol and a specific polyoxyalkylene monoalkyl ether, the total amount of which is 0.01 to 10% by mass; and (b) at least one surfactant selected from a reverse Tetronic block polymer, a Pluronic block polymer, and a Tetronic block polymer, the total amount of which is 0.1 to 10% by mass; preferably, the composition further contains one or more selected from an alkali agent, a chelating agent, a solubilizing agent, a bleaching agent, an anti-corrosion agent, a bactericidal agent, or an enzyme. Summary of the Invention

[0007] Diphenyl ether compounds, such as diclosan, are known as antimicrobial agents. Their antimicrobial effectiveness decreases as the pH of a cleaning solution containing them increases. Therefore, cleaning compositions containing these compounds desirably contain an acidic agent to further lower the pH of the solution when the compound is dissolved or dispersed in water.

[0008] However, the inventors discovered that when a powdered detergent composition containing the compound and an acidic agent is packaged in a water-soluble film as a detergent product, the acidic agent, due to its high hygroscopicity, absorbs moisture from the water-soluble film. Furthermore, the acidic agent, due to its acidic properties, dissolves the water-soluble film, causing it to dry out and yellow, thereby impairing the quality of the product.

[0009] The present invention provides a detergent article which is obtained by packaging a powder detergent composition containing an acidic agent in a water-soluble film and which can suppress drying and yellowing of the water-soluble film caused by the acidic agent.

[0010] The present invention relates to a detergent article, wherein the detergent article is formed by packaging a powder detergent composition containing the following components (a), (b), (c), and (d) in a water-soluble film, wherein the detergent article is dispersed in water so that the powder detergent composition is contained at a concentration of 0.029% by mass, and the resulting dispersion has a pH of 9.0 or less at 20°C.

[0011] Component (a): surfactant;

[0012] Component (b): an acidic agent, wherein a mixture of 1 g of the acidic agent dispersed or dissolved in 1000 g of water has a pH of 9.0 or less at 20°C, and exhibits a mass increase of more than 1% by mass after exposure to ambient conditions of 30°C and 70% humidity for 24 hours.

[0013] Component (c): a non-hygroscopic particle group, the mass increase rate of which after being placed in an environment with an air temperature of 30°C and a humidity of 70% for 24 hours is less than 1% by mass;

[0014] Component (d): diphenyl ether compounds.

[0015] According to the present invention, a detergent article is provided in which a powder detergent composition containing an acidic agent is packaged in a water-soluble film, and in which drying and yellowing of the water-soluble film caused by the acidic agent is suppressed.

[0016] The present invention makes it possible to obtain a detergent article with stable quality even when containing an acid. Furthermore, the powdered detergent composition contained in the detergent article of the present invention contains an acid and a diphenyl ether compound, so it is expected to have an antibacterial effect on fiber products such as clothing, allowing people to easily use the detergent article with the expected antibacterial effect. DETAILED DESCRIPTION

[0017] [Cleaning Items]

[0018] The detergent article of the present invention is formed by packaging a powder detergent composition containing component (a), component (b), component (c), and component (d) (hereinafter referred to as "the powder detergent composition of the present invention") in a water-soluble film.

[0019] The cleaning article of the present invention is composed of a powdered cleaning composition comprising component (a), component (b), component (c), and component (d) (i.e., the powdered cleaning composition of the present invention) and a water-soluble film, and the cleaning composition is packaged in the water-soluble film.

[0020] <Powder Cleanser Composition>

[0021] <Ingredients (a)>

[0022] The powder detergent composition of the present invention contains a surfactant as component (a).

[0023] As the surfactant of component (a), one or more surfactants selected from (a1) anionic surfactants (hereinafter referred to as component (a1)), (a2) nonionic surfactants (hereinafter referred to as component (a2)), (a3) ​​cationic surfactants (hereinafter referred to as component (a3)), and (a4) amphoteric surfactants (hereinafter referred to as component (a4)) can be mentioned. From the viewpoint of cleaning power, one or more surfactants selected from component (a1), component (a2), and component (a3) ​​are preferred, and one or more surfactants selected from component (a1) and component (a2) are more preferred.

[0024] Examples of the anionic surfactant of component (a1) include at least one selected from alkylbenzenesulfonates, polyoxyalkylene alkyl ether sulfates or polyoxyalkylene alkenyl ether sulfates, alkyl sulfates or alkenyl sulfates, olefinsulfonates, alkanesulfonates, saturated fatty acid salts or unsaturated fatty acid salts, alkyl ether carboxylates or alkenyl ether carboxylates, α-sulfo fatty acid salts, N-acylamino acids, phosphoric acid monoesters or diesters, and sulfosuccinates.

[0025] The number of carbon atoms in the alkyl or alkenyl group of the anionic surfactant is, for example, 8 to 22, preferably 10 to 16, and more preferably 12 to 14. In the polyoxyalkylene group of the anionic surfactant, the oxyalkylene group is preferably one or more groups selected from oxyethylene and oxypropylene, more preferably oxyethylene. In the polyoxyalkylene group, the average number of added moles of the oxyalkylene group is, for example, 0 to 10, and preferably 1 to 3.

[0026] Examples of the counter ions of the anionic groups of these anionic surfactants include alkali metal ions such as sodium ion and potassium ion; alkaline earth metal ions such as calcium ion and magnesium ion; ammonium ion; and alkanolamines having 1 to 3 alkanol groups each having 2 or 3 carbon atoms (e.g., monoethanolamine, diethanolamine, triethanolamine, triisopropanolamine, etc.).

[0027] From the viewpoint of detergency, component (a1) is preferably at least one selected from alkylbenzenesulfonates, alkyl ether sulfates or alkenyl ether sulfates, and alkyl sulfates or alkenyl sulfates.

[0028] The number of carbon atoms in the alkylbenzenesulfonate is 10 or more, preferably 12 or more, and 18 or less, preferably 14 or less. The alkyl group is preferably a linear chain.

[0029] The alkyl ether sulfate or alkenyl ether sulfate is preferably a polyoxyalkylene alkyl ether sulfate or a polyoxyalkylene alkenyl ether sulfate. The polyoxyalkylene alkyl ether sulfate or the polyoxyalkylene alkenyl ether sulfate has an alkyl or alkenyl group having 8 or more, preferably 10 or more, and 18 or less, preferably 14 or less carbon atoms. In the polyoxyalkylene alkyl ether sulfate or the polyoxyalkylene alkenyl ether sulfate, the number of carbon atoms of the oxyalkylene group is preferably 2 or 3, more preferably 2, and the average number of added moles of the oxyalkylene group is 0.5 or more, more preferably 1.0 or more, and 4.0 or less, preferably 3.0 or less.

[0030] In the alkyl sulfate ester salt or the alkenyl sulfate ester salt, the number of carbon atoms of the alkyl group or the alkenyl group is 10 or more, preferably 12 or more, and 18 or less, preferably 14 or less.

[0031] The nonionic surfactant of the component (a2) is preferably a nonionic surfactant (a21) containing an oxyalkylene group and having an average number of added moles of the oxyalkylene group of 1 to 30 (hereinafter referred to as the component (a21)).

[0032] The oxyalkylene group of component (a21) is preferably one or more groups selected from oxyalkylene groups having carbon atoms of 2 to 4. The oxyalkylene group having carbon atoms of 2 to 4 is preferably one or more groups selected from oxyethylene groups and oxypropylene groups.

[0033] From the viewpoint of detergency and storage stability, the average number of added moles of the oxyalkylene groups of component (a21) is 1 or more, preferably 6 or more, more preferably 10 or more, and is 30 or less, preferably 25 or less, more preferably 20 or less.

[0034] Component (a21) is preferably a nonionic surfactant represented by the following general formula (a21).

[0035] R 21a (CO) m O-(A 21a O) n -R 22a (a21)

[0036] Where R 21a is an aliphatic hydrocarbon group having 8 or more and 18 or less carbon atoms; R 22a is a hydrogen atom or a methyl group; CO is a carbonyl group, m is 0 or 1; A 21a The O group is an oxyalkylene group having 2 to 4 carbon atoms and including an ethyleneoxy group; n is the average number of added moles, which is 1 to 30.

[0037] From the viewpoint of cleaning power, in the general formula (a21), R 21a The number of carbon atoms is 8 or more, preferably 10 or more, more preferably 12 or more, and is 18 or less, preferably 16 or less, more preferably 14 or less.

[0038] R 21a It is an aliphatic hydrocarbon group, preferably a group selected from an alkyl group and an alkenyl group.

[0039] In the general formula (a21), A 21a The O group is an oxyalkylene group having 2 or more and 4 or less carbon atoms including an oxyethylene group, preferably an oxyalkylene group having 2 or more and 3 or less carbon atoms including an oxyethylene group, and more preferably an oxyethylene group. 21a The O group can also be an oxyalkylene group containing oxyethylene and other oxyalkylene groups (such as oxypropylene). Other oxyalkylene groups are preferably oxypropylene groups. 21a When the O group contains oxyethylene and other oxyalkylene groups, the oxyethylene and other oxyalkylene groups may be bonded in a block type or randomly.

[0040] In the general formula (a21), n ​​is A 21a The average number of added moles of O groups is 1 or more and 30 or less. From the viewpoint of cleaning power and storage stability, in the general formula (a21), n ​​is 1 or more, preferably 6 or more, more preferably 10 or more, and is 30 or less, preferably 25 or less, more preferably 20 or less.

[0041] Specific examples of the nonionic surfactant having no oxyalkylene group other than component (a21) include one or more selected from sucrose fatty acid esters, glycerol fatty acid esters, sorbitan fatty acid esters, alkyl glycosides, and glyceryl monoethers.

[0042] The cationic surfactant as component (a3) ​​is preferably at least one selected from (a31) a compound represented by the following general formula (a31) (hereinafter referred to as component (a31)), and (a32) a compound represented by the following general formula (a32) (hereinafter referred to as component (a32)).

[0043]

[0044] Where R 31a is an aliphatic hydrocarbon group having 8 to 18 carbon atoms, R 32a is 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 33a and R 34a Each independently represents a group selected from an alkyl group having 1 to 3 carbon atoms and a hydroxyalkyl group having 1 to 3 carbon atoms, - is an anion,

[0045]

[0046] Where R 35a is an aliphatic hydrocarbon group having 8 to 18 carbon atoms, R 36a and R 37a Each independently represents a group selected from an alkyl group having 1 to 3 carbon atoms and a hydroxyalkyl group having 1 to 3 carbon atoms, - For anion.

[0047] From the viewpoint of cleaning power, in the general formula (a31), R 31a The number of carbon atoms in R is 8 or more, preferably 10 or more, more preferably 12 or more, and preferably 18 or less, more preferably 16 or less. 31a It is preferably an alkyl group or an alkenyl group, and more preferably an alkyl group.

[0048] In the general formula (a31), R 32a It is 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.

[0049] In R 32a In the case of an aliphatic hydrocarbon group having 8 to 18 carbon atoms, from the viewpoint of detergency, R 32aIt is preferably an alkyl group or alkenyl group having 8 or more, preferably 10 or more, more preferably 12 or more, and preferably 18 or less, more preferably 16 or less carbon atoms, and is more preferably an alkyl group.

[0050] In the general formula (a31), R 33a and R 34a Each independently represents a group selected from an alkyl group having 1 to 3 carbon atoms and a hydroxyalkyl group having 1 to 3 carbon atoms. 33a and R 34a Preferably, each independently represents a group selected from an alkyl group having 1 to 3 carbon atoms. Examples of the alkyl group having 1 to 3 carbon atoms include a methyl group, an ethyl group, and a propyl group. Examples of the hydroxyalkyl group having 1 to 3 carbon atoms include a hydroxymethyl group, a hydroxyethyl group, and a hydroxypropyl group.

[0051] In the general formula (a31), X - is an anion. Examples of the anion include halogen ions such as chloride ions, bromide ions, and iodide ions. In addition, examples include alkyl sulfate ions having 1 to 3 carbon atoms such as methyl sulfate ions, ethyl sulfate ions, and propyl sulfate ions.

[0052] In the general formula (a32), R 35a It is an aliphatic hydrocarbon group having 8 or more and 18 or less carbon atoms. 35a The number of carbon atoms in R is 8 or more, preferably 10 or more, and preferably 18 or less, more preferably 16 or less, and further preferably 14 or less. 35a It is preferably an alkyl group or an alkenyl group, and more preferably an alkyl group.

[0053] In the general formula (a32), R 36a and R 37a Each independently represents a group selected from an alkyl group having 1 to 3 carbon atoms and a hydroxyalkyl group having 1 to 3 carbon atoms. 36a and R 37a Preferably, each independently represents a group selected from an alkyl group having 1 to 3 carbon atoms. Examples of the alkyl group having 1 to 3 carbon atoms include a methyl group, an ethyl group, and a propyl group. Examples of the hydroxyalkyl group having 1 to 3 carbon atoms include a hydroxymethyl group, a hydroxyethyl group, and a hydroxypropyl group.

[0054] In the general formula (a32), X - is an anion. Examples of the anion include halogen ions such as chloride ions, bromide ions, and iodide ions. In addition, examples include alkyl sulfate ions having 1 to 3 carbon atoms such as methyl sulfate ions, ethyl sulfate ions, and propyl sulfate ions.

[0055] Examples of the amphoteric surfactant of component (a4) 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. Among these, the alkanoyl group is, for example, lauroyl or myristoyl. Furthermore, among these, the alkyl group is, for example, lauryl or myristyl.

[0056] <Ingredient (b)>

[0057] The powder detergent composition of the present invention contains an acidic agent as component (b). A mixture prepared by dispersing or dissolving 1 g of the acidic agent in 1000 g of water has a pH of 9.0 or less at 20°C. The acidic agent exhibits a mass increase exceeding 1% by mass after being allowed to stand for 24 hours under environmental conditions of 30°C and 70% humidity. The acidic agent as component (b) is a solid particle group.

[0058] From the viewpoint of antibacterial activity, the pH value of a mixed solution prepared by dispersing or dissolving 1 g of the acid agent in 1000 g of water at 20°C is 9.0 or less, preferably 8.0 or less, more preferably 7.0 or less, even more preferably 6.0 or less, even more preferably 5.0 or less, even more preferably 4.0 or less, even more preferably 3.0 or less. From the viewpoint of further improving quality stability, it is preferably 1 or more, more preferably 1.5 or more.

[0059] The pH value at 20°C is measured as follows: 1 g of an acid agent is mixed with 1000 g of water at 20°C in a cylindrical container (inner diameter 10 cm, height 15 cm, made of glass), a cylindrical stirring bar with a diameter of 11 mm and a length of 43 mm is placed, and the mixture is dispersed using a magnetic stirrer (e.g., NISSIN stirrer SW-M120). The pH value of the mixed solution is measured 10 minutes after the start of mixing.

[0060] From the perspective of the stability of the acidic agent in the powder detergent composition, the mass increase rate of the acidic agent after being left under environmental conditions of a temperature of 30°C and a humidity of 70% for 24 hours exceeds 1% by mass, preferably 5% by mass or more, more preferably 10% by mass or more, and even more preferably 15% by mass or more, and is preferably 40% by mass or less, more preferably 30% by mass or less, and even more preferably 25% by mass or less.

[0061] The acid agent was weighed and stored under environmental conditions of 30° C. and 70% humidity for 24 hours, and the mass increase rate was calculated according to the following formula.

[0062] Mass increase rate (mass %) = {(mass of the acid agent after storage (g) - mass of the acid agent before storage (g)) / mass of the acid agent before storage (g)} × 100

[0063] Specifically, as the acid agent, one or more selected from aluminum sulfate (pH 2.0, mass increase rate 21 mass %), citric acid (pH 2.0, mass increase rate 11 mass %), alum (pH 6.1, mass increase rate 5.1 mass %), malonic acid (pH 2.2, mass increase rate 5.1 mass %), fumaric acid (pH 2.4, mass increase rate 4.3 mass %), tartaric acid (pH 1.9, mass increase rate 6.2 mass %), and succinic acid (pH 2.8, mass increase rate 3.5 mass %) can be listed.

[0064] In parentheses are: the pH value of a mixture obtained by dispersing or dissolving 1 g of each acid in 1000 g of water at 20°C; and the rate of mass increase of each acid after being placed in an environment with an air temperature of 30°C and a humidity of 70% for 24 hours.

[0065] From the viewpoint of the stability of the acidic agent in the powder detergent composition, the acidic agent is preferably one or more selected from aluminum sulfate, citric acid, fumaric acid, malic acid, tartaric acid, succinic acid, alum, and malonic acid, and more preferably one or more selected from aluminum sulfate and citric acid.

[0066] <Ingredient (c)>

[0067] The powder detergent composition of the present invention contains non-hygroscopic particles as component (c), and the mass increase rate of the non-hygroscopic particles after being left under environmental conditions of 30°C and 70% humidity for 24 hours is less than 1% by mass.

[0068] From the perspective of storage stability of the powder detergent composition particles, the mass increase rate of the non-hygroscopic particle group after being left under environmental conditions of a temperature of 30°C and a humidity of 70% for 24 hours is less than 1 mass%, preferably 0.1 mass% or less, more preferably 0.01 mass% or less, and even more preferably 0.001 mass% or less.

[0069] The non-hygroscopic particles were weighed and stored under environmental conditions of a temperature of 30° C. and a humidity of 70% for 24 hours, and the mass increase rate was calculated according to the following formula.

[0070] Mass increase rate (mass %) = {(mass of non-hygroscopic particle group after storage (g) - mass of non-hygroscopic particle group before storage (g)) / mass of non-hygroscopic particle group before storage (g)} × 100

[0071] Specifically, examples of the non-hygroscopic particle group include one or more selected from sodium sulfate (mass increase rate: 0.0001 mass %) and calcium carbonate (mass increase rate: 0.0001 mass %).

[0072] The data in parentheses show the mass increase rate of each non-hygroscopic particle group after being placed in an environment with a temperature of 30°C and a humidity of 70% for 24 hours.

[0073] From the viewpoint of classification within the water-soluble film, the average particle size of the non-hygroscopic particle group of component (c) is preferably 50 μm or more, more preferably 100 μm or more, further preferably 150 μm or more, and is preferably 350 μm or less, more preferably 250 μm or less, further preferably 200 μm or less.

[0074] Here, the average particle size is determined from the mass fraction based on the size of the sieve after vibrating the sieve using a standard sieve of JIS Z 8801 for 5 minutes.

[0075] <Ingredient (d)>

[0076] The powder detergent composition of the present invention contains a diphenyl ether compound as a component (d).

[0077] Diphenyl ether compounds refer to antimicrobial compounds having a diphenyl ether skeleton. Component (d) is preferably an antimicrobial compound containing a halogen atom and having a diphenyl ether skeleton. Specific compounds of component (d) include one or more selected from diclosan (4,4'-dichloro-2-hydroxydiphenyl ether) and triclosan (2,4,4'-trichloro-2'-hydroxydiphenyl ether). From the perspective of formulation stability, diclosan is preferred.

[0078] <Composition, etc.>

[0079] Regarding the powder detergent composition of the present invention, from the viewpoint of cleaning power and storage stability of the powder detergent composition particles, the content of component (a) in the powder detergent composition is preferably 2% by mass or more, more preferably 5% by mass or more, further preferably 10% by mass or more, further more preferably 15% by mass or more, and preferably 40% by mass or less, more preferably 30% by mass or less, further preferably 25% by mass or less.

[0080] Moreover, when the powder detergent composition of this invention contains component (a1) as component (a), the mass of component (a1) is the value converted into sodium salt.

[0081] Moreover, when the powder detergent composition of this invention contains component (a3) ​​as component (a), the mass of component (a3) ​​is the value converted into chloride.

[0082] Regarding the powder detergent composition of the present invention, from the viewpoint of antibacterial properties and suppression of drying and yellowing of the water-soluble film, the content of component (b) in the powder detergent composition is preferably 2% by mass or more, more preferably 4% by mass or more, even more preferably 5% by mass or more, and preferably 40% by mass or less, more preferably 30% by mass or less, even more preferably 20% by mass, even more preferably 15% by mass or less, even more preferably 10% by mass or less, even more preferably 8% by mass or less.

[0083] Regarding the powder detergent composition of the present invention, from the viewpoint of suppressing drying and yellowing of the water-soluble film, the content of component (c) in the powder detergent composition is preferably 10% by mass or more, more preferably 20% by mass or more, further preferably 25% by mass or more, further preferably 28% by mass or more, and is preferably 80% by mass or less, more preferably 70% by mass or less, further preferably 60% by mass or less, further more preferably 50% by mass or less, further more preferably 40% by mass or less, further more preferably 35% by mass or less.

[0084] From the viewpoint of suppressing drying and yellowing of the water-soluble film, in the powder detergent composition of the present invention, the mass ratio (c) / (b) of the content of component (b) to the content of component (c) is preferably 0.01 or more, more preferably 1 or more, even more preferably 2 or more, even more preferably 3 or more, and is preferably 40 or less, more preferably 30 or less, even more preferably 20 or less, even more preferably 15 or less, even more preferably 10 or less, even more preferably 9 or less.

[0085] Regarding the powder detergent composition of the present invention, from the viewpoint of antibacterial properties and storage stability of the powder detergent composition particles, the content of component (d) in the powder detergent composition is preferably 0.01% by mass or more, more preferably 0.02% by mass or more, further preferably 0.05% by mass or more, further more preferably 0.1% by mass or more, and preferably 1.5% by mass or less, more preferably 1.0% by mass or less, further preferably 0.8% by mass or less.

[0086] From the viewpoint of cleaning power, the powder detergent composition of the present invention may contain an alkaline agent as component (e). Component (e) includes one or more alkaline agents selected from alkali metal carbonates, alkali metal hydrogencarbonates, alkali metal silicates, and tripolyphosphates.

[0087] Examples of the alkali metal carbonate include sodium carbonate and potassium carbonate, and sodium carbonate is preferred.

[0088] Examples of the alkali metal hydrogen carbonate include sodium hydrogen carbonate and potassium hydrogen carbonate.

[0089] Examples of the alkali metal silicate include sodium silicate and potassium silicate.

[0090] Examples of the tripolyphosphate include alkali metal tripolyphosphate salts.

[0091] From the viewpoint of cleaning power and suppression of drying and yellowing of the water-soluble film, component (e) is preferably an alkaline agent selected from one or more alkali metal carbonates and alkali metal hydrogen carbonates, more preferably an alkali metal carbonate, further preferably one or more selected from sodium carbonate and potassium carbonate, and even more preferably sodium carbonate.

[0092] When the powder detergent composition of the present invention contains component (e), from the viewpoint of cleaning power and suppression of drying and yellowing of the water-soluble film, the content of component (e) in the powder detergent composition is preferably 1% by mass or more, more preferably 5% by mass or more, even more preferably 10% by mass or more, and is preferably 60% by mass or less, more preferably 50% by mass or less, even more preferably 40% by mass or less, even more preferably 30% by mass or less, even more preferably 20% by mass or less, even more preferably 15% by mass or less.

[0093] From the viewpoint of the fluidity of the powder detergent composition, the powder detergent composition of the present invention may contain, as component (f), one or more compounds selected from zeolite and bentonite.

[0094] Zeolite is also known as a crystalline aluminosilicate. Specific examples of zeolite include crystalline aluminosilicates such as A-type, X-type, and P-type zeolites. The average primary particle size is preferably 0.1 μm or larger, more preferably 1 μm or larger, and preferably 10 μm or smaller, more preferably 5 μm or smaller. A suitable crystalline aluminosilicate is preferably A-type zeolite (for example, trade name "TOYOBUILDER" manufactured by Tosoh Corporation, oil absorption capacity measured by JIS K 5101-13-2 method: 40 mL / 100 g or greater). Suitable zeolites include P-type (e.g., trade names "Doucil A24" and "ZSEO64"; all manufactured by Crosfield; oil absorption capacity 60 to 150 mL / 100 g), X-type (e.g., trade name "Wessalith XD"; manufactured by Degussa; oil absorption capacity 80 to 100 mL / 100 g), and mixed zeolites described in International Publication No. 98 / 42622.

[0095] Bentonite preferably has an ion exchange capacity of 50 to 100 meq / 100 g. Examples of bentonite include at least one selected from the following: (f1) smectite clays selected from montmorillonite, saponite, or hectorite of an alkali metal or alkaline earth metal; (f2) illite; (f3) attapulgite; and (f4) kaolinite. Granulated bentonite can be used. For example, reference can be made to the granulated clay minerals described in Japanese Patent Application Laid-Open No. 2008-189719.

[0096] When the powder detergent composition of the present invention contains component (f), from the viewpoint of the fluidity of the powder detergent composition, the content of component (f) in the powder detergent composition is preferably 1% by mass or more, more preferably 5% by mass or more, further preferably 10% by mass or more, further more preferably 15% by mass or more, and is preferably 60% by mass or less, more preferably 50% by mass or less, further preferably 40% by mass or less.

[0097] From the viewpoint of storage stability of the powder detergent composition particles, the powder detergent composition of the present invention may contain, as component (g), a polyalkylene glycol having a weight average molecular weight of 100 to 100,000.

[0098] As the component (g), one or more kinds selected from polyethylene glycol and polypropylene glycol can be mentioned.

[0099] The weight average molecular weight of component (g) is 100 or more, preferably 1000 or more, more preferably 5000 or more, further preferably 10000 or more, and is 100000 or less, preferably 50000 or less, more preferably 20000 or less.

[0100] Here, the weight average molecular weight is a value determined by gel permeation chromatography using polystyrene as a standard substance.

[0101] When the powder detergent composition of the present invention contains component (g), from the viewpoint of storage stability of the powder detergent composition particles, the content of component (g) in the powder detergent composition is preferably 0.01% by mass or more, more preferably 0.1% by mass or more, further preferably 0.3% by mass or more, and is preferably 10% by mass or less, more preferably 5% by mass or less, further preferably 1.0% by mass or less.

[0102] From the viewpoint of cleaning properties, the powder detergent composition of the present invention may contain, as component (h), a polymer having a carboxylic acid group or a salt thereof and having a weight average molecular weight of 3,000 or more.

[0103] Examples of the component (h) include polymers selected from polyacrylic acid or its salts, and copolymers of acrylic acid and maleic acid or their salts (hereinafter referred to as component (h1)).

[0104] Examples of the polyacrylic acid or a salt thereof include polyacrylic acid, sodium polyacrylate, potassium polyacrylate, and the like. Preferred examples include sodium polyacrylate and potassium polyacrylate.

[0105] Examples of the copolymer of acrylic acid and maleic acid or its salt include copolymers of acrylic acid and maleic acid, sodium salts of copolymers of acrylic acid and maleic acid, and potassium salts of copolymers of acrylic acid and maleic acid. Preferred examples include sodium salts of copolymers of acrylic acid and maleic acid, and potassium salts of copolymers of acrylic acid and maleic acid. The molar ratio of acrylic acid to maleic acid in the copolymer, calculated as the number of moles of acrylic acid / the number of moles of maleic acid, is preferably 1 / 99 or greater, more preferably 10 / 90 or greater, and preferably 99 / 1 or less, more preferably 90 / 10 or less.

[0106] Component (h1) can also be a copolymer comprising monomers other than acrylic acid and maleic acid that can be copolymerized with acrylic acid and / or maleic acid, as long as it is the degree that does not hinder the performance of the effect of the present invention. As monomers other than acrylic acid and maleic acid that can be copolymerized with acrylic acid and / or maleic acid, there can be listed: vinyl monomers, acrylic acid monomers, styrene monomers etc., more specifically, there can be listed: methacrylic acid, methyl acrylate, ethyl acrylate, methyl methacrylate, styrene etc. In component (h1), the molar ratio of monomers other than acrylic acid and maleic acid that can be copolymerized with acrylic acid and / or maleic acid in component (h1) is preferably 0 mol% or more, and preferably 5 mol% or less, more preferably 3 mol% or less, further preferably 0 mol%. Therefore, the polyacrylic acid or its salt of the present invention, and the copolymer of acrylic acid and maleic acid or its salt can be a polymer or copolymer comprising monomers other than acrylic acid and maleic acid that can be copolymerized with acrylic acid and / or maleic acid in a range of 0 mol% or more and 5 mol% or less in all constituent monomers.

[0107] The weight average molecular weight of component (h) is 3,000 or more, preferably 3,500 or more, more preferably 4,000 or more, further preferably 5,000 or more, further more preferably 6,000 or more, further more preferably 7,000 or more, further more preferably 8,000 or more, further more preferably 9,000 or more, further more preferably 10,000 or more, and preferably 100,000 or less, more preferably 50,000 or less, further preferably 10,000 or less.

[0108] The weight average molecular weight can be measured by the following method for measuring the weight average molecular weight.

[0109] <Method for measuring weight average molecular weight>

[0110] The weight average molecular weight of the component (h) can be measured by GPC (gel permeation chromatography) and the weight average molecular weight (Mw) can be determined by conversion to a standard substance.

[0111] The measurement conditions of GPC are shown below.

[0112] Column: Made by Tosoh Corporation, trade name: TSK-GEL guard PWXL

[0113] Made by Tosoh Corporation, trade name: TSK-GEL G4000 PWXL

[0114] Made by Tosoh Corporation, trade name: TSK-GEL G2500 PWXL

[0115] Mobile phase: 0.1 mol / L potassium dihydrogen phosphate and 0.1 mol / L sodium dihydrogen phosphate in water / acetonitrile = 90 / 10 (volume ratio)

[0116] Detector: Differential refractive index detector

[0117] Column temperature: 40°C

[0118] Flow rate: 1.0 mL / min

[0119] Conversion standard substance: Polyacrylic acid [manufactured by American Standard Corporation]

[0120] Sample: Ion-exchanged water was added to an aqueous polymer solution containing 0.8 g of solid content to prepare a total liquid volume of 200 mL. 10 μL of the prepared solution was aliquoted and injected into the column.

[0121] When the powder detergent composition of the present invention contains component (h), from the viewpoint of cleaning properties and storage stability of the powder detergent composition particles, the content of component (h) in the powder detergent composition is preferably 0.5 mass% or more, more preferably 1.0 mass% or more, even more preferably 2.0 mass% or more, and is preferably 15 mass% or less, more preferably 10 mass% or less, even more preferably 5.0 mass% or less.

[0122] When the powder detergent composition of the present invention contains a component (h), the mass of the component (h) is a value converted into a sodium salt.

[0123] The powder detergent composition of the present invention may contain water. Deionized water (sometimes also referred to as ion-exchanged water) or ion-exchanged water supplemented with sodium hypochlorite at a concentration of 1 mg / kg to 5 mg / kg may be used. Alternatively, tap water may be used.

[0124] When the powder detergent composition of the present invention contains water, the water content in the powder detergent composition is preferably 0.01% by mass or more, more preferably 0.1% by mass or more, even more preferably 1.0% by mass or more, and is preferably 15% by mass or less, more preferably 10% by mass or less, even more preferably 5.0% by mass or less.

[0125] The powder detergent composition of the present invention may contain other ingredients known in the field of laundry detergents, and may contain, for example, bleaching agents (perborate, bleach activators, etc.), redeposit inhibitors, reducing agents (sulfites, etc.), fluorescent whitening agents, foam inhibitors (silicone, etc.), organic solvents, enzymes, fragrances, colorants, etc. (however, excluding substances corresponding to components (a) to (h)).

[0126] From the perspective of the usability of the powder detergent composition, the apparent density (bulk density) of the powder detergent composition of the present invention measured by the method specified in JIS K 3362: 2008 is preferably 1000 g / L or less, more preferably 950 g / L or less, even more preferably 900 g / L or less, and is preferably 300 g / L or more, more preferably 400 g / L or more, even more preferably 500 g / L or more, even more preferably 600 g / L or more, and even more preferably 700 g / L or more.

[0127] From the perspective of the fluidity of the powder detergent composition, the average particle size of the powder detergent composition of the present invention is preferably 200 μm or more, more preferably 250 μm or more, and even more preferably 300 μm or more, and is preferably 650 μm or less, more preferably 600 μm or less, and even more preferably 550 μm or less. Here, the average particle size is the value determined by the mass fraction based on the size of the sieve after vibrating a standard sieve according to JIS Z 8801 for 5 minutes.

[0128] The powder detergent composition of the present invention can be produced by known methods. For example, it can be produced by spray drying, dry neutralization, dry granulation, dry blending, fluidized bed drying, thin film drying, extrusion granulation, tumbling granulation, stirring granulation, compaction granulation, surfactant loading, or a combination of these methods.

[0129] Cleaning products

[0130] The detergent article of the present invention is formed by packaging the powder detergent composition of the present invention in a water-soluble film.

[0131] The detergent article of the present invention comprises the powder detergent composition of the present invention and a water-soluble film, wherein the powder detergent composition is packaged in the water-soluble film.

[0132] In the present invention, a water-soluble membrane refers to a membrane that meets the following conditions: 500 g of ion-exchanged water at 30°C is added to a 1-liter glass beaker, a stirring rod made of Teflon (registered trademark) with a diameter of 8 cm is placed, 1 g of the membrane to be evaluated is added thereto, and after stirring at 100 rpm for 30 minutes, no insoluble matter is observed in appearance.

[0133] From the viewpoint of preventing accidental drinking and solubility, the thickness of the water-soluble film is preferably 1 μm or more, more preferably 10 μm or more, and even more preferably 50 μm or more, and is preferably 200 μm or less, more preferably 150 μm or less, and even more preferably 100 μm or less.

[0134] The water-soluble film is preferably composed of a polymer. The water-soluble film can be obtained by methods known in the art such as casting, blow molding, extrusion molding, injection molding, etc. of a polymer. As a non-limiting example of a polymer for making a water-soluble film, examples include: polyvinyl alcohol (PVA), vinyl alcohol copolymer, polyvinyl pyrrolidone, polyoxyalkylene, (modified) cellulose, (modified) cellulose ether or (modified) cellulose ester or (modified) cellulose amide, polycarboxylic acids and their salts, copolymers of maleic acid / acrylic acid, polyamino acids, i.e. peptides, polyamides such as polyacrylamide, polysaccharides such as starch and gelatin, natural rubbers such as xanthan gum and carragheen (carragum). Vinyl alcohol copolymer is a copolymer of vinyl alcohol and other monomers (such as ethylene, acrylic acid). Preferably, the water-soluble film comprises a polymer selected from polyacrylate and water-soluble acrylate, methylcellulose, sodium carboxymethylcellulose, dextrin, ethylcellulose, hydroxyethylcellulose, maltodextrin, polymethacrylate, polyvinyl alcohol, vinyl alcohol copolymer, hydroxypropyl methylcellulose (HPMC), and combinations thereof. More preferably, the water-soluble film comprises a polymer selected from polyvinyl alcohol, vinyl alcohol copolymers, and hydroxypropyl methylcellulose. Even more preferably, the water-soluble film comprises polyvinyl alcohol, such as SOLUBLON available from AICELLO CORPORATION. Polymers suitable for water-soluble films for bag production are described, for example, in U.S. Patent No. 6,995,126.

[0135] In the detergent article of the present invention, the total area of ​​the water-soluble film in contact with the powder detergent composition of the present invention is preferably 2 cm from the viewpoint of further improving the stability of the product. 2 More than 5cm, more preferably2 More than 7cm, more preferably 2 More than 15 cm 2 From the same viewpoint, it is preferably 100 cm 2 Below, more preferably 70cm 2 Below, more preferably 60cm 2 Below, more preferably 45cm 2 the following.

[0136] The detergent article of the present invention can be produced by any suitable process known in the art (e.g., a process for producing a detergent bag). Examples of processes for producing bags are described in U.S. Patent No. 6,995,126, U.S. Patent No. 7,127,874, U.S. Patent No. 8,156,713, U.S. Patent No. 7,386,971, U.S. Patent No. 7,439,215, U.S. Patent Application Publication No. 2009 / 199877, Japanese Patent No. 6915017, and Japanese Patent No. 4514858.

[0137] For the cleaning article of the present invention, the amount of content of each is preferably 5g or more, more preferably 8g or more, and even more preferably 10g or more, and preferably 50g or less, more preferably 30g or less, and even more preferably 25g or less. In addition, the preferred shape and size of each is, for example, a quadrilateral shape, with a side preferably having a length of 1cm or more and 5cm or less, and a thickness preferably having a thickness of 1cm or more and 5cm or less, and even more preferably having a thickness of 1cm or more and 4cm or less. In addition, the mass of each is preferably 5g or more, more preferably 10g or more, and even more preferably 15g or more, and preferably 50g or less, more preferably 40g or less, and even more preferably 30g or less.

[0138] Another preferred shape and size of each is, for example, a rectangular parallelepiped, with a longitudinal length preferably between 5 cm and 20 cm, a transverse length preferably between 1 cm and 4 cm, and a thickness preferably between 1 cm and 5 cm, more preferably between 1 cm and 4 cm. Furthermore, each preferably has a mass of 5 g or more, more preferably between 10 g and 50 g, more preferably between 40 g and 30 g, and even more preferably between 20 g and 20 g.

[0139] From the viewpoint of antimicrobial properties and cleaning properties, the pH value of the dispersion prepared by dispersing the cleaning article of the present invention in water so as to contain the powdered cleaning composition of the present invention at a concentration of 0.029% by mass at 20°C is 9.0 or less, preferably 8.0 or less, more preferably 7.0 or less, even more preferably 6.0 or less, even more preferably 5.0 or less, and preferably 2.0 or more, more preferably 3.0 or more.

[0140] Specifically, in the detergent article of the present invention, the pH value at 20° C. of a dispersion prepared by dispersing the powder detergent composition of the present invention in water so as to achieve a concentration of 0.029% by mass can be within the above range from the viewpoint of antimicrobial properties and cleaning properties.

[0141] The pH value at 20°C is measured as follows: in a cylindrical container (inner diameter 10 cm, height 15 cm, made of glass), the detergent article is mixed with 1000 g of water at 20°C so that the concentration of the powder detergent composition of the present invention contained therein becomes 0.029 mass %, a cylindrical stirring bar with a diameter of 11 mm and a length of 43 mm is placed, and the mixture is dispersed using a magnetic stirrer (e.g., NISSIN stirrer SW-M120). The pH value of the dispersion is measured 10 minutes after the start of mixing.

[0142] The pH value was measured by the pH measurement method described below.

[0143] <pH Measurement Method>

[0144] Connect the composite electrode for pH measurement (glass frosted sleeve type manufactured by HORIBA) to the pH meter (pH / ion meter F-23 manufactured by HORIBA) and turn on the power. As the internal liquid of the pH electrode, a saturated potassium chloride aqueous solution (3.33 mol / L) is used. Next, the pH 4.01 standard solution (phthalate standard solution), pH 6.86 (neutral phosphate standard solution), and pH 9.18 standard solution (borate standard solution) are respectively filled in 100 mL beakers and immersed in a constant temperature bath at 25°C for 30 minutes. The electrode for pH measurement is immersed in the standard solution adjusted to a constant temperature for 3 minutes, and the calibration operation is performed in the order of pH 6.86 → pH 9.18 → pH 4.01. The sample to be measured is adjusted to 25°C, the electrode of the above-mentioned pH meter is immersed in the sample, and the pH value is measured after 1 minute.

[0145] The detergent article of the present invention can be suitably used for cleaning textile products, and is particularly suitably used for cleaning textile products using a washing machine.

[0146] The fiber to be cleaned with the detergent article of the present invention can be any type of hydrophobic fiber or hydrophilic fiber. Examples of hydrophobic fibers include protein fibers (milk protein casein fibers, Promix, etc.), polyamide fibers (nylon, etc.), polyester fibers (polyester, etc.), polyacrylonitrile fibers (acrylic acid, etc.), polyvinyl alcohol fibers (vinylon, etc.), polyvinyl chloride fibers (polyvinyl chloride, etc.), polyvinylidene chloride fibers (vinylidene, etc.), polyolefin fibers (polyethylene, polypropylene, etc.), polyurethane fibers (polyurethane, etc.), polyvinyl chloride / polyvinyl alcohol copolymer fibers (polyvinyl chloride alcohol fibers, etc.), polyalkylene parahydroxybenzoate fibers (benzoate, etc.), polyvinyl fluoride fibers (polytetrafluoroethylene, etc.), glass fibers, carbon fibers, alumina fibers, silicon carbide fibers, rock fibers, slag fibers, metal fibers (gold wire, silver wire, steel fiber), etc. Examples of hydrophilic fibers include: hair fibers (cotton, kapok, etc.), bast fibers (hemp, flax, ramie, hemp, jute, etc.), leaf vein fibers (Manila hemp, ramie, etc.), coconut fibers, rush, straw, animal hair fibers (wool, mohair, cashmere goat hair, camel hair, alpaca hair, llama hair, angora rabbit hair, etc.), silk fibers (domestic silk, wild silk), feathers, cellulose fibers (rayon, high wet modulus viscose fiber, cuprammonium fiber, acetate fiber, etc.), etc.

[0147] Regarding the fiber, from the viewpoint of finishing properties, the fiber is preferably a fiber containing cotton fiber. From the viewpoint of finishing properties of the fiber, the content of the cotton fiber in the fiber 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.

[0148] In the present invention, fiber products refer to fabrics made of the above-mentioned hydrophobic fibers or hydrophilic fibers, such as woven fabrics, knitted fabrics, non-woven fabrics, etc., as well as vests, T-shirts, suit shirts, women's shirts, casual pants, hats, handkerchiefs, towels, knitted fabrics, socks, underwear, tights, etc. obtained by using the fabrics.

[0149] [Cleaning methods for fiber products]

[0150] The present invention provides a method for cleaning a fiber product, wherein the fiber product is cleaned with a cleaning liquid prepared by mixing the detergent of the present invention with water (hereinafter referred to as the "cleaning liquid of the present invention").

[0151] The method for cleaning a textile product of the present invention can appropriately apply the aspects described in the detergent article of the present invention.

[0152] The method for cleaning a fiber product of the present invention may be a method comprising placing the detergent of the present invention and water into a cleaning tank and mixing them to prepare the cleaning solution of the present invention, then placing the fiber product to be cleaned into the tank to clean the fiber product. From the perspective of simplifying cleaning, a preferred method is a method comprising placing the detergent of the present invention, water, and the fiber product into the cleaning tank, dissolving the detergent of the present invention in the water, preparing the cleaning solution of the present invention, and simultaneously cleaning the fiber product.

[0153] In the method for cleaning fiber products of the present invention, from the viewpoint of cleaning performance and rinsing properties, the amount of water when mixing the detergent article of the present invention with water is adjusted so that the total amount of the powder detergent composition of the present invention contained in the detergent article of the present invention relative to 1 L of water is preferably 0.1 g or more, more preferably 0.2 g or more, even more preferably 0.3 g or more, and preferably 10 g or less, more preferably 5 g or less, and even more preferably 1.0 g or less.

[0154] In the cleaning method of the present invention, from the viewpoint of cleaning performance, the water temperature is preferably 10°C or higher, more preferably 20°C or higher, and even more preferably 30°C or higher, and is preferably 100°C or lower, more preferably 80°C or lower, and even more preferably 60°C or lower.

[0155] The temperature of the cleaning liquid of the present invention may be within the above range. The temperature of water used in the cleaning method of the present invention (eg, water used for rinsing) may also be within the above range.

[0156] From the viewpoint of antibacterial properties and cleaning properties, the pH value of the cleaning solution of the present invention at 25°C is 9.0 or less, preferably 8.0 or less, more preferably 7.0 or less, further preferably 6.0 or less, and even more preferably 5.0 or less, and is preferably 2.0 or more, and more preferably 3.0 or more.

[0157] The pH value was measured according to the pH value measurement method described in the above-mentioned detergent articles.

[0158] In the cleaning method of the fiber product of the present invention, from the viewpoint of cleanability and economy, the bath ratio value represented by the ratio of the mass (kg) of the fiber product to the amount (liter) of the cleaning solution containing the detergent composition of the present invention and water (i.e., the value of the amount (liter) of the cleaning solution of the present invention / the mass (kg) of the fiber product) is preferably 8 or more, more preferably 10 or more, further preferably 12 or more, further more preferably 15 or more, and preferably 45 or less, more preferably 40 or less, further preferably 30 or less, and further more preferably 20 or less.

[0159] In the cleaning method of the fiber product of the present invention, from the perspective of cleaning performance, the cleaning time for bringing the detergent article of the present invention, the fiber product and water into contact (i.e., the cleaning time for bringing the cleaning liquid of the present invention into contact with the fiber product) is preferably 1 minute or more, more preferably 3 minutes or more, and even more preferably 5 minutes or more. From the perspective of clothing damage, it is preferably 1 hour or less, more preferably 45 minutes or less, and even more preferably 30 minutes or less.

[0160] The cleaning method of the fiber product of the present invention is suitable for: a method of immersing the fiber in a liquid for refining while conveying the fiber using a roller or the like; and a rotary cleaning method. The rotary cleaning method refers to a cleaning method in which a fiber product that is not fixed to a rotary machine is rotated around a rotating axis together with a cleaning liquid. The rotary cleaning method can be implemented by a rotary washing machine. Therefore, in the cleaning method of the present invention, from the perspective of making the fiber product cleaner, it is preferred to use a washing machine (especially a rotary washing machine) to clean the above-mentioned fiber product. As a rotary washing machine, specifically, there can be mentioned: a drum washing machine, a pulsator washing machine or an agitator washing machine. As these rotary washing machines, commercially available household washing machines can be used.

[0161] After cleaning the fiber products, they can be washed and dehydrated. Washing and dehydration can be performed using a washing machine. Washing and dehydration can be performed alternately multiple times.

[0162] After washing and dehydrating, drying can be performed. Drying can be either natural drying or heat drying. Drying can be performed multiple times.

[0163] The following are examples of the embodiments of the present invention. In these embodiments, the matters described in the detergent article and the method for cleaning a textile product of the present invention can be appropriately applied.

[0164] <1>

[0165] A detergent article comprising a powder detergent composition comprising the following components (a), (b), (c), and (d) packaged in a water-soluble film, wherein the detergent article is dispersed in water so as to have a concentration of the powder detergent composition of 0.029% by mass and wherein the dispersion has a pH of 9.0 or less at 20°C.

[0166] Component (a): surfactant;

[0167] Component (b): an acidic agent, wherein a mixture of 1 g of the acidic agent dispersed or dissolved in 1000 g of water has a pH of 9.0 or less at 20°C, and exhibits a mass increase of more than 1% by mass after exposure to ambient conditions of 30°C and 70% humidity for 24 hours.

[0168] Component (c): a non-hygroscopic particle group, the mass increase rate of which after being placed in an environment with an air temperature of 30°C and a humidity of 70% for 24 hours is less than 1% by mass;

[0169] Component (d): diphenyl ether compounds.

[0170] <2>

[0171] The detergent article according to <1>, wherein the detergent article comprises the powder detergent composition and the water-soluble film, and the powder detergent composition is packaged in the water-soluble film package.

[0172] <3>

[0173] The cleaning article according to <1> or <2>, wherein the pH of a dispersion prepared by dispersing the cleaning article in water so as to contain the powdered cleaning composition at a concentration of 0.029% by mass is 9.0 or less, preferably 8.0 or less, more preferably 7.0 or less, even more preferably 6.0 or less, even more preferably 5.0 or less, and preferably 2.0 or more, more preferably 3.0 or more at 20°C.

[0174] <4>

[0175] The detergent article according to any one of <1> to <3>, wherein the pH of a dispersion obtained by dispersing the powder detergent composition in water so as to achieve a concentration of 0.029% by mass is 9.0 or less, preferably 8.0 or less, more preferably 7.0 or less, even more preferably 6.0 or less, even more preferably 5.0 or less, and preferably 2.0 or more, more preferably 3.0 or more at 20°C.

[0176] <5>

[0177] The cleaning article according to any one of <1> to <4>, wherein component (a) is preferably one or more selected from (a1) anionic surfactants (hereinafter referred to as component (a1)), (a2) nonionic surfactants (hereinafter referred to as component (a2)), (a3) ​​cationic surfactants (hereinafter referred to as component (a3)), and (a4) amphoteric surfactants (hereinafter referred to as component (a4)), more preferably one or more selected from component (a1), component (a2), and component (a3), and even more preferably one or more selected from component (a1) and component (a2).

[0178] <6>

[0179] The cleaning article according to any one of <1> to <5>, wherein component (b) satisfies the following conditions: a mixed solution prepared by dispersing or dissolving 1 g of component (b) in 1000 g of water has a pH at 20°C of 9.0 or less, preferably 8.0 or less, more preferably 7.0 or less, even more preferably 6.0 or less, even more preferably 5.0 or less, even more preferably 4.0 or less, even more preferably 3.0 or less, and preferably 1 or more, more preferably 1.5 or more.

[0180] <7>

[0181] The cleaning article according to any one of <1> to <6>, wherein component (b) satisfies the following conditions: the rate of mass increase of component (b) after being left under environmental conditions of a temperature of 30°C and a humidity of 70% for 24 hours exceeds 1% by mass, preferably 5% by mass or more, more preferably 10% by mass or more, further preferably 15% by mass or more, and is preferably 40% by mass or less, more preferably 30% by mass or less, further preferably 25% by mass or less.

[0182] <8>

[0183] The cleaning article according to any one of <1> to <7>, wherein the component (b) is at least one selected from the group consisting of aluminum sulfate, citric acid, fumaric acid, malic acid, tartaric acid, succinic acid, alum, and malonic acid.

[0184] <9>

[0185] The cleaning article as described in any one of <1> to <8>, wherein component (c) satisfies the following conditions: the rate of mass increase of component (c) after being left under environmental conditions of a temperature of 30°C and a humidity of 70% for 24 hours is less than 1% by mass, preferably 0.1% by mass or less, more preferably 0.01% by mass or less, and even more preferably 0.001% by mass or less.

[0186] <10>

[0187] The cleaning article according to any one of <1> to <9>, wherein the component (c) is at least one selected from sodium sulfate and calcium carbonate.

[0188] <11>

[0189] The detergent article according to any one of <1> to <10>, wherein the average particle size of component (c) is preferably 50 μm or more, more preferably 100 μm or more, further preferably 150 μm or more, and is preferably 350 μm or less, more preferably 250 μm or less, further preferably 200 μm or less.

[0190] <12>

[0191] The detergent article according to any one of <1> to <11>, wherein in the powder detergent composition, the mass ratio (c) / (b) of the content of component (b) to the content of component (c) is preferably 0.01 or more, more preferably 1 or more, further preferably 2 or more, further preferably 3 or more, and is preferably 40 or less, more preferably 30 or less, further preferably 20 or less, further more preferably 15 or less, further more preferably 10 or less, further more preferably 9 or less.

[0192] <13>

[0193] The cleaning article according to any one of <1> to <12>, wherein the component (d) is an antimicrobial compound having a diphenyl ether skeleton, preferably an antimicrobial compound containing a halogen atom and having a diphenyl ether skeleton.

[0194] <14>

[0195] The cleaning article according to any one of <1> to <13>, wherein the component (d) is at least one selected from diclosan and triclosan.

[0196] <15>

[0197] The detergent article according to any one of <1> to <14>, wherein the detergent article is used for fiber products.

[0198] <16>

[0199] A method for cleaning a textile product, comprising cleaning the textile product with a cleaning liquid prepared by mixing the cleaning agent according to any one of <1> to <15> with water.

[0200] Example

[0201] <Ingredients>

[0202] The following components were used in the Examples and Comparative Examples. The formulation compositions of the components other than enzymes in the table indicate the pure amount (mass %) of each component. Enzymes are expressed as a wet weight amount (mass %).

[0203] [ingredient (a)]

[0204] LAS-Na: sodium laurylbenzenesulfonate, NEOPELEX FS, manufactured by Kao Corporation, component (a1).

[0205] ES: sodium polyoxyethylene lauryl ether sulfate, component (a1), EMAL 270J, manufactured by Kao Corporation.

[0206] AS: sodium lauryl sulfate, ingredient (a1), EMAL 10G, manufactured by Kao Corporation.

[0207] C12EO10: polyoxyethylene lauryl ether (the average number of added moles of oxyethylene is 10 mol), EMULGEN 110, manufactured by Kao Corporation, component (a2).

[0208] C16TMAC: In the general formula (a31), R 31a is an alkyl group with 16 carbon atoms, R 32a 、R 33a and R 34a is methyl, X - A compound containing a chloride ion; component (a3).

[0209] [Component (b)]

[0210] Aluminum sulfate: manufactured by Fujifilm Wako Pure Chemical Industries, Ltd., pH 2.0, mass increase rate 21% by mass.

[0211] Citric acid: manufactured by Fujifilm Wako Pure Chemical Industries, Ltd., pH 2.0, mass increase rate 11% by mass.

[0212] Fumaric acid: manufactured by Fujifilm Wako Pure Chemical Industries, Ltd., pH 2.4, mass increase rate 4.3% by mass.

[0213] The pH value of each component (b) is the pH value at 20°C of a mixed solution prepared by dispersing or dissolving 1 g of each component (b) in 1000 g of water. The pH value was measured by mixing 1 g of each component (b) with 1000 g of water at 20°C in a cylindrical container (1 L beaker, inner diameter 10 cm, height 15 cm, made of glass). A cylindrical stirring bar with a diameter of 11 mm and a length of 43 mm was placed in the container, and the mixture was dispersed using a magnetic stirrer (NISSIN stirrer SW-M120). The pH value of the mixed solution was measured 10 minutes after the start of mixing.

[0214] The mass increase rate of each component (b) is the mass increase rate after being placed under environmental conditions of 30°C and 70% humidity for 24 hours. 5.0 g of each component (b) was weighed and stored in a thermostatic chamber at 30°C and 70% humidity for 24 hours. The mass increase rate was calculated using the following formula.

[0215] Mass increase rate (mass %) = {(mass of the acid agent after storage (g) - mass of the acid agent before storage (g)) / mass of the acid agent before storage (g)} × 100

[0216] [Component (c)]

[0217] Sodium sulfate: manufactured by Fujifilm Wako Pure Chemical Industries, Ltd., mass increase rate 0.0001% by mass, average particle size 100 μm

[0218] Calcium carbonate: manufactured by Fujifilm Wako Pure Chemical Industries, Ltd., mass increase rate 0.0001% by mass, average particle size 150 μm

[0219] The mass increase rate of each component (c) described above is the mass increase rate after being placed in an environment with a temperature of 30°C and a humidity of 70% for 24 hours. 5.0 g of each component (c) was weighed and stored in a thermostatic chamber at a temperature of 30°C and a humidity of 70% for 24 hours. The mass increase rate was calculated using the following formula.

[0220] Mass increase rate (mass %) = {(mass of non-hygroscopic particle group after storage (g) - mass of non-hygroscopic particle group before storage (g)) / mass of non-hygroscopic particle group before storage (g)} × 100

[0221] The average particle size of each component (c) was determined from the mass fraction based on the size of the sieve after vibrating the sieve using a standard sieve according to JIS Z 8801 for 5 minutes.

[0222] [Component (d)]

[0223] Diclosan: manufactured by BASF.

[0224] Triclosan: manufactured by BASF.

[0225] [Ingredient (e)]

[0226] Sodium carbonate: manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.

[0227] [ingredient (f)]

[0228] Bentonite: Kunipia F, manufactured by KUNIMINE INDUSTRIES CO., LTD.

[0229] [Ingredients (g)]

[0230] Polyethylene glycol: weight average molecular weight 13,000, PEG-13000, manufactured by Mitsui Chemicals, Inc.

[0231] [Ingredient (h)]

[0232] ·Polyacrylic acid: sodium polyacrylate, weight average molecular weight 10,000, POIZ 536, manufactured by Kao Corporation.

[0233] [Other ingredients]

[0234] Enzyme: Protease, manufactured by Novozymes, Inc., containing 4% by mass of protease (as enzyme protein quantified by a protein assay kit (Lowry kit, manufactured by Nacalai Tesque Co., Ltd.)).

[0235] Fragrance: Methyl salicylate, manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.

[0236] <Preparation of Powder Cleanser Composition>

[0237] The powder detergent compositions shown in Table 1 were prepared by the following method using the above-mentioned formulation ingredients.

[0238] Specifically, the powder detergent composition is prepared by mixing components (c), (e), (g), and (h) that form spray-dried granules with water to prepare a slurry, spray-drying the mixture to prepare base granules; dry-neutralizing the base granule blending component (a); and finally, placing the mixture in a high-speed mixer (manufactured by Fukae Industry Co., Ltd.) and dry-mixing the remaining components (b), (d), and (f) as post-blending components, along with other components, to obtain various powdered detergent compositions. The various prepared powder detergent compositions had a bulk density of 700 to 900 g / L as measured by the method specified in JIS K 3362:2008, and an average particle size of 200 to 650 μm, as determined by the mass fraction based on the size of the sieve, after vibrating for 5 minutes using a standard sieve specified in JIS Z 8801.

[0239] Each of the prepared powder detergent compositions was mixed with 1000 g of water at 20°C in a cylindrical container (1 L beaker, inner diameter 10 cm, height 15 cm, glass) to a concentration of 0.029 mass %. A cylindrical stirring bar with a diameter of 11 mm and a length of 43 mm was placed, and the mixture was dispersed using a magnetic stirrer (NISSIN stirrer SW-M120). The pH of the dispersion was measured 10 minutes after the start of mixing. The results are shown in Table 1.

[0240] <Cleaning Products Production>

[0241] Two 15 cm × 2 cm water-soluble films (M8685, manufactured by Monosol Co., Ltd.) were overlapped and three sides were welded together using a heat sealer (manufactured by Fuji Impulse Co., Ltd.) to make a bag with only one side open. 20 g of each powder detergent composition was added to the bag. Thereafter, one side of the bag was welded and sealed using a heat sealer to obtain a detergent article in which each powder detergent composition was packaged in a water-soluble film. The total area of ​​the water-soluble film in contact with the powder detergent composition was 30 cm 2 .

[0242] <Evaluation of cleaning products>

[0243] The water-soluble film used to prepare the cleaning products was weighed in advance and stored in aluminum bags at 60°C for 24 hours. The water-soluble film was removed from each cleaning product after storage, and the mass loss rate of the water-soluble film was calculated using the following formula. The lower the mass loss rate of the water-soluble film, the more effectively it was able to suppress drying of the water-soluble film caused by the acid. The results are shown in Table 1.

[0244] Mass reduction rate (mass %) = {(mass of water-soluble film before storage (g) - mass of water-soluble film after storage (g)) / mass of water-soluble film before storage (g)} × 100

[0245] The appearance of the water-soluble film of each detergent article after storage was visually inspected, and the case where no yellowing occurred was designated as "◯", and the case where yellowing occurred was designated as "×". The results are shown in Table 1.

[0246]

Claims

1. A cleaning product, wherein The detergent article is formed by packaging a powder detergent composition containing the following components (a), (b), (c), and (d) in a water-soluble film, wherein the detergent article is dispersed in water so that the concentration of the powder detergent composition is 0.029% by mass, and the dispersion has a pH of 9.0 or less at 20° C. Component (a): surfactant; Component (b): an acidic agent, wherein a mixture of 1 g of the acidic agent dispersed or dissolved in 1000 g of water has a pH of 9.0 or less at 20°C, and exhibits a mass increase of more than 1% by mass after exposure to ambient conditions of 30°C and 70% humidity for 24 hours. Component (c): a non-hygroscopic particle group, the mass increase rate of which after being placed in an environment with an air temperature of 30°C and a humidity of 70% for 24 hours is less than 1% by mass; Component (d): diphenyl ether compounds.

2. The cleaning article according to claim 1, wherein Component (b) is one or more selected from the group consisting of aluminum sulfate, citric acid, fumaric acid, malic acid, tartaric acid, succinic acid, alum, and malonic acid.

3. The cleaning article according to claim 1 or 2, wherein Component (c) is at least one selected from sodium sulfate and calcium carbonate.

4. The cleaning article according to any one of claims 1 to 3, wherein The average particle size of the component (c) is 50 μm or more and 350 μm or less.

5. The cleaning article according to any one of claims 1 to 4, wherein In the powder detergent composition, the mass ratio (c) / (b) of the content of the component (b) to the content of the component (c) is 0.01 to 40.

6. The cleaning article according to any one of claims 1 to 5, wherein Component (d) is at least one selected from diclosan and triclosan.

7. The cleaning article according to any one of claims 1 to 6, wherein This detergent article is for use on textile products.

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