Textile-product detergent article with water-soluble container

Abstract

Provided is a textile-product detergent article with a water-soluble container, the detergent article comprising a detergent composition and a water-soluble container. The detergent composition comprises a specific powder component (A) and a specific liquid component (B), wherein the (B) component is a liquid including a surfactant (b) in an amount of 30-80 mass% with respect to the total mass of the (B) component. The water-soluble container has at least a first accommodation chamber and a second accommodation chamber. The first accommodation chamber contains the (A) component and the second accommodation chamber contains the (B) component, and when the textile-product detergent article with the water-soluble container is put into water, the (A) component is released earlier into the water than the (B) component.

Description

Water-soluble container-packed textile cleaning agent

[0001] The present invention relates to a water-soluble container-packaged fabric cleaning article. This application claims priority to Japanese Patent Application No. 2024-083473, filed May 22, 2024, the contents of which are incorporated herein by reference.

[0002] Metal ions (e.g., calcium ions, magnesium ions) contained in water (laundry liquid) during washing tend to bind to surfactants, which are cleaning ingredients in detergent compositions, weakening the cleaning performance of the detergent composition. Chelating agents are generally used as components that capture these metal ions. For example, Patent Document 1 proposes a water-soluble containerized textile detergent article made from a water-soluble film and having at least two compartments, the first compartment containing a specific liquid component and the second compartment containing a solid component containing a chelating agent. The invention of Patent Document 1 aims to achieve the same overall cleaning effect as a lower-concentration formulation while using a smaller total amount.

[0003] Japanese Patent Application Laid-Open No. 2019-065297

[0004] However, textile detergent articles packaged in water-soluble containers are required to have further improved detergency. In addition, in textile detergent articles packaged in water-soluble containers containing solid components, if the solid components solidify, the formed lumps may affect the water-soluble container. Therefore, the present invention aims to provide a textile detergent article packaged in a water-soluble container that has further improved detergency and can suppress solidification.

[0005] As a result of extensive research, the present inventors have found that by releasing a chelating agent into the wash water and then releasing a detergent component such as a surfactant into the wash liquid, the effect of the chelating agent can be maximized, resulting in high detergency. The present invention has been made based on the above findings and has the following aspects.

[0006] <1> A detergent article for textile products in a water-soluble container, the detergent composition comprising a detergent composition and a water-soluble container, the detergent composition comprising a powder component (A) and a liquid component (B), the component (A) comprising at least one selected from the group consisting of the component (a1) and the component (a2), the component (a1) comprising 10 mass% or more of a carbonate salt relative to the total mass of the component (A), the component (a2) comprising 20 mass% or more of at least one chelating agent (a21) selected from a hydroxycarboxylic acid chelating agent and an aminocarboxylic acid chelating agent relative to the total mass of the component (A), and 0.001 to 0.03 mass parts of a water-insoluble powder (a22) relative to 1 mass part of the component (a21), the component (B) comprising a surfactant (b) in an amount of 30 to 80 mass% relative to the total mass of the component (B), the component (b) comprising a non-soap anionic surfactant (b1), The water-soluble container has at least a first storage chamber and a second storage chamber, the first storage chamber stores the component (A), and the second storage chamber stores the component (B), and when the water-soluble container-packaged textile cleaning article is placed in water, the component (A) is released into the water earlier than the component (B). <2> The water-soluble container-packaged textile cleaning article according to <1>, wherein the first storage chamber stores 50% by volume or more of air, and the second storage chamber stores 40% by volume or less of air. <3> The water-soluble container-packaged textile cleaning article according to <1> or <2>, wherein the specific gravity of the component (A) is 1.50 to 4.00, and the specific gravity of the component (B) is 1.00 to 1.20. <4> The water-soluble container-packaged textile detergent article according to any one of <1> to <3>, wherein the component (b1) includes at least one selected from the group consisting of linear alkylbenzenesulfonic acid or a salt thereof, and polyoxyalkylene alkyl(alkenyl) ether sulfate or a salt thereof.

[0007] The detergent article for textile products encased in a water-soluble container of the present invention further enhances the detergency and is excellent in preventing solidification.

[0008] 1 is a perspective view showing one embodiment of a detergent article for textiles encased in a water-soluble container according to the present invention; 2 is a perspective view showing one embodiment of a detergent article for textiles encased in a water-soluble container according to the present invention;

[0009] (Textile detergent article encased in a water-soluble container) The textile detergent article encased in a water-soluble container of the present invention (hereinafter sometimes simply referred to as the "detergent article") comprises a detergent composition and a water-soluble container containing the detergent composition. An example of a detergent article is shown in FIG. 1. The detergent article in FIG. 1 comprises a water-soluble container 2. The water-soluble container 2 comprises two opposing water-soluble films whose peripheries are sealed with a peripheral seal portion 4, and a storage chamber 3 is formed therein. The storage chamber 3 is partitioned into a first storage chamber 10 and a second storage chamber 20 by a partition seal portion 6. The detergent composition comprises a powder component (A) and a liquid component (B). The powder component (A) is contained in the first storage chamber 10, and the liquid component (B) is contained in the second storage chamber 20.

[0010] <Water-soluble container> The water-soluble container of the present invention is a container that dissolves in water and releases its contents when placed in water. As shown in Figure 1, the water-soluble container 2 of this embodiment is formed by sealing the peripheries of two opposing sheets of water-soluble film with a peripheral seal portion 4. The water-soluble container of the present invention is not limited to this embodiment and may also be a blow-molded container made of a water-soluble resin. In this specification and claims, "water-soluble" means the property of completely dissolving a 50 mm square water-soluble film test piece in 900 mL of water at 25°C within 10 minutes when stirred.

[0011] Resins can be used as materials for the water-soluble container 2. Examples of resins for the water-soluble container 2 (hereinafter sometimes simply referred to as "container resins") include polyvinyl alcohol, polyvinylpyrrolidone, polyalkylene oxide, acrylamide, acrylic acid, cellulose, cellulose ether, cellulose ester, cellulose amide, polyvinyl acetate, polycarboxylic acids or salts thereof, polyamino acids or peptides, polyamides, polyacrylamides, copolymers of maleic acid and acrylic acid, polysaccharides including starch and gelatin, and natural rubbers such as xanthan or carrageenan. Of these materials, polyvinyl alcohol is preferred.

[0012] The resin constituting the container may contain a plasticizer. Examples of the plasticizer include polyhydric alcohols such as glycerin, diglycerin, diethylene glycol, triethylene glycol, propylene glycol, dipropylene glycol, trimethylolpropane, pentaerythritol, and 1,3-butanediol, polyethers such as polyethylene glycol and polypropylene glycol, polyvinylamides such as polyvinylpyrrolidone, phenol derivatives such as bisphenol A and bisphenol S, amide compounds such as N-methylpyrrolidone and dimethylacetamide, compounds obtained by adding ethylene oxide to polyhydric alcohols such as glycerin, pentaerythritol, and sorbitol, and water. These plasticizers may be used alone or in combination of two or more.

[0013] From the viewpoint of improving water solubility, additives to the resin constituting the container are preferably glycerin, diglycerin, diethylene glycol, triethylene glycol, propylene glycol, dipropylene glycol, trimethylolpropane, polyethylene glycol, or polyvinylpyrrolidone. In particular, from the viewpoint of the effect of suppressing a decrease in water solubility of the film due to bleed-out of the plasticizer, preferred plasticizers are glycerin, diglycerin, trimethylolpropane, polyethylene glycol, or polyvinylpyrrolidone.

[0014] The content of the plasticizer contained in the resin constituting the container is preferably 1 to 50 parts by mass, more preferably 20 to 40 parts by mass, per 100 parts by mass of the resin. By making the amount of plasticizer contained in the water-soluble film and the amount of plasticizer contained in the content liquid approximately the same, a state of equilibrium in the transfer of plasticizer that occurs between the film and the content liquid can be maintained, thereby maintaining the softness of the film. Therefore, when the content of the plasticizer contained in the water-soluble film is within the above range, it is possible to impart appropriate flexibility to the water-soluble container 2.

[0015] The resin constituting the container may contain additives, as necessary, such as inorganic fillers (e.g., silica, heavy, light, or surface-treated calcium carbonate, aluminum hydroxide, aluminum oxide, titanium oxide, diatomaceous earth, barium sulfate, calcium sulfate, zeolite, zinc oxide, silicic acid, silicates, mica, magnesium carbonate, kaolin, clays such as halloysite, pyrophyllite, and sericite, and talc), colorants, fragrances, extenders, antifoaming agents, release agents, ultraviolet absorbers, surfactants, carboxymethylcellulose, polyacrylamide, polyacrylic acid or a salt thereof, methylcellulose, hydroxymethylcellulose, and other water-soluble polymers.

[0016] Examples of commercially available water-soluble films include Monosol M8310, M8312, M8630, M7061, M8775, and M8900 (all trade names) manufactured by Monosol LLC (Merrillville, Indiana, USA).

[0017] The wall thickness of the water-soluble container 2 (thickness of the water-soluble film) can be determined appropriately within a range that does not impair strength and water solubility, and is set to, for example, 70 to 90 μm.

[0018] The wall thickness (thickness of the water-soluble film) of the water-soluble container 2 in the first storage chamber 10 and the wall thickness (thickness of the water-soluble film) of the water-soluble container 2 in the second storage chamber 20 may be the same or different. However, when the detergent article 1 is placed in water, the content of the first storage chamber 10 (powder component (A)) is released into the water earlier than the content of the second storage chamber 20 (liquid component (B)). In other words, the wall thickness of the water-soluble container 2 is set so that the release of the powder component (A) occurs earlier than the release of the liquid component (B). For example, if the wall thickness of the water-soluble container 2 in the first storage chamber 10 and the wall thickness of the water-soluble container 2 in the second storage chamber 20 are the same, the wall of the first storage chamber 10 containing the powder component (A) will begin to dissolve in water earlier than the wall of the second storage chamber 20 containing the liquid component (B). This effect can be inferred as follows. Because the specific gravity of the powder component is higher than that of the liquid component, when both components are contained at the same weight, the volume of the powder component will be smaller than that of the liquid component. In other words, the volume of air in the storage chamber containing the powder component is larger in the storage chamber containing the powder component, and therefore the buoyancy (or internal pressure) of the storage chamber containing the powder component is greater in water, which is thought to cause the storage chamber containing the powder component to collapse earlier than the storage chamber containing the liquid component. This results in the release of powder component (A) earlier than the release of liquid component (B). The wall thickness of the water-soluble container 2 in the first storage chamber 10 may be thinner than the wall thickness of the water-soluble container 2 in the second storage chamber 20. This results in the release of powder component (A) earlier than the release of liquid component (B).

[0019] The proportion of the water-soluble container is preferably 4 to 18% by mass, more preferably 5 to 10% by mass, relative to the total mass of the cleansing article. When the proportion of the water-soluble container is equal to or greater than the lower limit, the puncture strength of the film can be improved. When the proportion of the water-soluble container is equal to or less than the upper limit, the undissolved portion of the film can be reduced.

[0020] <Detergent Composition> The detergent composition contains a powder component (A) and a liquid component (B). Because the powder component (A) is contained in the first storage chamber 10 and the liquid component (B) is contained in the second storage chamber 20, they are not mixed in the water-soluble container. However, in this specification, the components that dissolve in water and mix to form the laundry liquid are collectively referred to as the "detergent composition." By storing the solid and liquid components of the detergent composition separately, it is possible to prevent the solid from solidifying and becoming less soluble in water. Furthermore, storing the detergent composition in a water-soluble container makes it easier to handle when using the detergent composition. The powder component (A) and the liquid component (B) are mixed in water only after the detergent article is dissolved in water. Since the first storage chamber 10 dissolves in water faster than the second storage chamber 20, the powder component (A) dissolves in water first, chelating metal ions in the water and preventing the non-soap anionic surfactant from chelating the metal ions in the water, thereby preventing a decrease in the amount of the non-soap anionic surfactant that contributes to the cleaning effect, and thereby making it easier to further enhance the cleaning power of the liquid component (B) containing the non-soap anionic surfactant. The powder component (A) and the liquid component (B) may each be composed of a single component or a mixture of two or more components.

[0021] <Powder Component (A)> Powder component (A) (component (A)) contains at least one selected from the following component (a1) and component (a2). By including component (A), the detergent composition can enhance the detergency of component (B), which will be described later. The average particle size of component (A) is, for example, preferably 100 to 1,000 μm, more preferably 200 to 600 μm, and even more preferably 300 to 500 μm. When the average particle size of component (A) is equal to or greater than the above-mentioned lower limit, solidification can be further suppressed (i.e., the solidification suppression effect is high). When the average particle size of component (A) is equal to or less than the above-mentioned upper limit, component (A) can be dissolved more quickly in water (excellent solubility). The average particle size is a weight-average particle size measured by a sieving method. Specifically, it is measured by the following method. The average particle size is measured by a classification operation using six sieves with openings of 1000 μm, 710 μm, 500 μm, 300 μm, 250 μm, and 150 μm and a tray. The classification operation involves stacking sieves on a tray in order from smallest to largest openings, placing 100 g of sample per run on the top 1000 μm sieve, covering it with a lid, and attaching it to a low-tap sieve shaker (manufactured by Iida Seisakusho Co., Ltd., tapping: 156 times / min, rolling: 290 times / min), vibrating for 10 minutes, and then recovering the sample remaining on each sieve and tray for each sieve opening. By repeating this operation, classified samples of each particle size are obtained, including those of 1000 μm or more (on a 1000 μm sieve), 710 to 1000 μm (on a 710 μm sieve), 500 to 710 μm (on a 500 μm sieve), 300 to 500 μm (on a 300 μm sieve), 250 to 300 μm (on a 250 μm sieve), 150 to 250 μm (on a 150 μm sieve), and those of the tray to 150 μm (passing through a 150 μm sieve, on the tray), and the masses of the samples are measured. The mass frequency (%) of the tray and each sieve is then calculated. The opening of the first sieve where the cumulative mass frequency is 50% or more is designated as "a (μm)," the opening of the sieve one size larger than a (μm) is designated as "b (μm)," the cumulative value of the mass frequency from the tray to the sieve of a (μm) is designated as "c (%)," and the mass frequency on the sieve of a (μm) is designated as "d (%)." The average particle size (50% particle size) is calculated using the following formula, and this is the average particle size obtained by the sieving method of the sample.

[0022]

[0023] [Component (a1)] Component (a1) is a carbonate. Carbonates are alkaline agents for adjusting pH and also function as chelating agents for capturing metal ions. Examples of component (a1) include sodium carbonate, sodium bicarbonate, double salts of sodium carbonate and sodium bicarbonate (sodium sesquicarbonate), sodium percarbonate, potassium carbonate, and potassium bicarbonate. As component (a1), sodium carbonate and potassium carbonate are preferred, and sodium carbonate is more preferred, from the viewpoint of further enhancing detergency. Component (a1) may be used alone or in combination of two or more.

[0024] As the component (a1), an anhydrate, monohydrate, or decahydrate can be used. From the viewpoint of enhancing the solidification suppression effect of the component (A), the anhydrate or monohydrate is preferred, and the anhydrate is more preferred.

[0025] The content of component (a1), relative to the total mass of component (A), is preferably 10% by mass or more, more preferably 60% by mass or more, and even more preferably 90% by mass or more. When the content of component (a1) is equal to or greater than the above-mentioned lower limit, detergency can be further enhanced. The upper limit of the content of component (a1) is not particularly limited, but is, for example, 99.99% by mass or less. The content of component (a1) is preferably 2.5% by mass or more, more preferably 15% by mass or more, and even more preferably 22% by mass or more, relative to the total mass of the detergent composition. When the content of component (a1) is equal to or greater than the above-mentioned lower limit, detergency can be further enhanced. The upper limit of the content of component (a1) is not particularly limited, but is, for example, 30% by mass or less.

[0026] [Component (a2)] The component (a2) is a combination of at least one chelating agent selected from hydroxycarboxylic acid chelating agents and aminocarboxylic acid chelating agents (component (a21)), and a water-insoluble powder (component (a22)).

[0027] The component (a21) is at least one selected from the group consisting of hydroxycarboxylic acid chelating agents and aminocarboxylic acid chelating agents.

[0028] The hydroxycarboxylic acid chelating agent is a chelating agent having a hydroxy group and a carboxy group. The hydroxycarboxylic acid chelating agent may have a primary, secondary, or tertiary amino group. Examples of the hydroxycarboxylic acid chelating agent include citric acid or a salt thereof, tartaric acid or a salt thereof, gluconic acid or a salt thereof, serine diacetic acid or a salt thereof, hydroxyiminodisuccinic acid or a salt thereof, hydroxyethylethylenediaminetriacetic acid or a salt thereof, and dihydroxyethylglycine or a salt thereof.

[0029] Examples of aminocarboxylic acid chelating agents include aminocarboxylic acids and salts thereof. Chelating agents having a hydroxy group, a carboxy group, and a primary to tertiary amino group are classified as hydroxycarboxylic acid chelating agents. Examples of aminocarboxylic acids and salts thereof include nitrilotriacetic acid and salts thereof, ethylenediaminetetraacetic acid and salts thereof, diethylenetriaminepentaacetic acid and salts thereof, β-alaninediacetic acid and salts thereof, aspartic acid diacetic acid and salts thereof, methylglycinediacetic acid and salts thereof, iminodisuccinic acid and salts thereof, and ethylenediaminedisuccinic acid and salts thereof.

[0030] Examples of salts constituting component (a21) include alkali metal salts, alkaline earth metal salts, alkanolamine salts, and ammonium salts. Examples of alkali metal salts include sodium salts and potassium salts. Examples of alkaline earth metal salts include magnesium salts and calcium salts. Examples of alkanolamine salts include monoethanolamine salts, diethanolamine salts, and triethanolamine salts. These components (a21) may be used alone or in combination of two or more.

[0031] The content of component (a21) is preferably 20 to 99.99 mass%, more preferably 40 to 99.99 mass%, and even more preferably 60 to 99.99 mass%, relative to the total mass of component (A). When the content of component (a21) is equal to or greater than the above-mentioned lower limit, detergency can be further enhanced. When the content of component (a21) is equal to or less than the above-mentioned upper limit, the solidification suppression effect can be enhanced. The content of component (a21) is preferably 5 to 25 mass%, more preferably 10 to 25 mass%, and even more preferably 15 to 25 mass%, relative to the total mass of the detergent composition. When the content of component (a21) is equal to or greater than the above-mentioned lower limit, detergency can be further enhanced. When the content of component (a21) is equal to or less than the above-mentioned upper limit, the solidification suppression effect can be enhanced.

[0032] The component (a22) is a water-insoluble powder. The water-insoluble powder component means a component whose solubility in 100 mL of ion-exchanged water at 25°C is 0.1 g or less.

[0033] Examples of component (a22) include aluminosilicates such as zeolite, phosphates such as sodium tripolyphosphate, natural or synthetic montmorillonite, bentonite (mainly composed of montmorillonite), smectite clay minerals such as beidellite, nontronite, saponite, sauconite, hectorite, and stevensite, vermiculite, and synthetic fluorine mica (e.g., Na-type synthetic mica and Li-type synthetic mica). Other examples of component (a22) include highly metal ion-substituted clay minerals obtained by ion-exchanging the clay minerals to improve swelling power. Among these, aluminosilicates such as zeolite are preferred as component (a22) from the viewpoints of anti-caking performance and environmental friendliness. Aluminosilicates may be either crystalline or amorphous. From the viewpoint of cation exchange capacity, crystalline aluminosilicates are preferred as component (a22). Examples of crystalline aluminosilicates include A-type, X-type, Y-type, and P-type zeolites. These components (a22) may be used alone or in combination of two or more.

[0034] The content of component (a22) is preferably 0.1 to 5 mass%, more preferably 0.1 to 3 mass%, and even more preferably 0.1 to 2 mass%, relative to the total mass of component (A). When the content of component (a22) is equal to or greater than the above-mentioned lower limit, the solidification-inhibiting effect is exhibited. When the content of component (a22) is equal to or less than the above-mentioned upper limit, the proportion of the chelating agent is increased, thereby improving cleaning performance. The content of component (a22) is preferably 0.025 to 1.25 mass%, more preferably 0.025 to 0.75 mass%, and even more preferably 0.25 to 0.5 mass%, relative to the total mass of the detergent composition. When the content of component (a22) is equal to or greater than the above-mentioned lower limit, the solidification-inhibiting effect is exhibited. When the content of component (a22) is equal to or less than the above-mentioned upper limit, the proportion of the chelating agent is increased, thereby improving cleaning performance.

[0035] The (a21) component and the (a22) component are used in combination. The compounding ratio of the (a21) component to the (a22) component is preferably 0.001 to 0.03 parts by mass, more preferably 0.001 to 0.01 parts by mass, per 1 part by mass of the (a21) component. That is, the mass ratio of the (a22) component to the (a21) component (hereinafter simply referred to as the "a22 / a21 ratio") is preferably 0.001 to 0.03, more preferably 0.001 to 0.01. When the a22 / a21 ratio is equal to or greater than the lower limit, solidification of the (a21) component can be more effectively suppressed. When the a22 / a21 ratio is equal to or less than the upper limit, the (a21) component dissolves more quickly in water, resulting in enhanced detergency.

[0036] [Other Components] The component (A) may contain a component other than the component (a1) or the component (a2) (optional component A). Examples of optional component A include an excipient (such as Glauber's salt, silicate, etc.), a colorant, a fragrance, a fluorescent agent, etc.

[0037] The content of component (A) is preferably 10 to 80 mass %, more preferably 15 to 50 mass %, and even more preferably 20 to 30 mass %, based on the total mass of the detergent composition. When the content of component (A) is equal to or greater than the lower limit, the detergency-improving effect of the chelating agent can be fully exerted. When the content of component (A) is equal to or less than the upper limit, the amount of activator increases, improving detergency.

[0038] The specific gravity of component (A) is preferably 1.50 to 4.00, more preferably 1.50 to 3.00, and even more preferably 1.50 to 2.70. If the specific gravity of component (A) is within the above range, a desirable porosity (ratio of the volume of air to the total volume of the storage chamber) can be ensured even when the maximum amount of component (A) is stored in the first storage chamber. In this specification, the specific gravity is measured by gas-phase substitution, using He gas to determine the volume of the sample from the change in pressure and volume. The density of the sample is calculated by measuring the volume and then weighing it.

[0039] The ratio of the volume of air in the first storage chamber to the total volume of the first storage chamber (hereinafter also referred to as porosity) is preferably 50% by volume or more, more preferably 60% by volume or more. If the porosity is equal to or greater than the above-mentioned lower limit, component (A) is more likely to be released from the storage chamber in water within 20 seconds. Furthermore, the porosity is preferably 90% by volume or less, more preferably 80% by volume or less. If the porosity is equal to or less than the above-mentioned upper limit, it is possible to secure a storage chamber size that is easy to use while storing a sufficient amount of component (A) for cleaning. In other words, the porosity of the first storage chamber is preferably 50 to 90% by volume, more preferably 60 to 80% by volume.

[0040] Liquid Component (B) Liquid component (B) (component (B)) contains a surfactant (b) containing the following component (b1). That is, component (B) is a liquid detergent. The detergent composition exhibits detergency by containing component (B).

[0041] [Component (b)] The component (b) is a surfactant and contains the following component (b1):

[0042] Component (b1) is a non-soap anionic surfactant. That is, component (b1) is an anionic surfactant excluding fatty acids having 8 to 22 carbon atoms or salts thereof. By including component (b1) in component (b), detergency can be further enhanced.

[0043] Examples of component (b1) include sulfonic acid-type anionic surfactants, sulfate ester-type anionic surfactants, carboxylate-type anionic surfactants, and phosphate ester-type anionic surfactants. Examples of sulfonic acid-type anionic surfactants include linear alkylbenzenesulfonic acid or its salt (LAS), α-olefinsulfonic acid or its salt (AOS), alkyl-group-containing alkanesulfonic acid or its salt, α-sulfofatty acid ester or its salt, internal olefinsulfonic acid or its salt (IOS), and hydroxyalkanesulfonic acid or its salt (HAS). Examples of sulfate ester-type anionic surfactants include linear or branched alkyl sulfate ester or its salt (AS), polyoxyalkylene alkyl(alkenyl) ether sulfate ester or its salt (AES), and the like. Examples of carboxylic acid-type anionic surfactants include alkyl ether carboxylic acid or its salt, polyoxyalkylene ether carboxylic acid or its salt, alkylamide ether carboxylic acid or its salt, alkenylamide ether carboxylic acid or its salt, and acylaminocarboxylic acid or its salt. Examples of phosphate ester-type anionic surfactants include alkyl phosphate esters or salts thereof, polyoxyalkylene alkyl phosphate esters or salts thereof, polyoxyalkylene alkylphenyl phosphate esters or salts thereof, and glycerin fatty acid ester monophosphate esters or salts thereof.

[0044] Examples of salts constituting component (b1) include alkali metal salts, alkaline earth metal salts, alkanolamine salts, and ammonium salts. Examples of alkali metal salts include sodium salts and potassium salts. Examples of alkaline earth metal salts include magnesium salts and calcium salts. Examples of alkanolamine salts include monoethanolamine salts, diethanolamine salts, and triethanolamine salts. These components (b1) may be used alone or in combination of two or more.

[0045] As the component (b1), LAS, AOS, AS, and AES are preferred, and from the viewpoint of further enhancing detergency, LAS and AES are more preferred.

[0046] The LAS preferably has a linear alkyl group having 12 to 14 carbon atoms.

[0047] AES is expressed by the following formula (b11): １７ -O-[(EO) ｍ / (PO) ｎ ]-SO ３ － M ＋ ...(b11) (In the formula (b11), R １７ is a linear or branched alkyl group having 8 to 20 carbon atoms or a linear or branched alkenyl group having 8 to 20 carbon atoms. EO is an oxyethylene group. PO is an oxypropylene group. m is a number of 0.1 or more representing the average number of EO repeats. n is a number of 0 to 6 representing the average number of PO repeats. [(EO) ｍ / (PO) ｎ ] indicates that the order of EO and PO is not limited, and M ＋ is the counter cation.)

[0048] The AES preferably has a linear or branched alkyl group having 10 to 20 carbon atoms or a linear or branched alkenyl group having 8 to 20 carbon atoms, to which an average of 1 to 5 moles of alkylene oxide is added. The number of carbon atoms in the alkyl or alkenyl group is preferably 10 to 20, and more preferably 12 to 14. In particular, a linear alkyl group having 10 to 20 carbon atoms is preferred, and a linear alkyl group having 12 to 14 carbon atoms is more preferred. Examples of the alkyl group include a dodecyl group, a tridecyl group, and a tetradecyl group.

[0049] In formula (b11), m is preferably 0.1 to 5, more preferably 0.1 to 3, even more preferably 0.5 to 2, and particularly preferably 0.5 to 1.5. n is 0 to 6, preferably 0 to 3, and more preferably 0. m+n is preferably greater than 0, and more preferably 1 to 5. When n is not 0, that is, when AES has EO and PO, [(EO) ｍ / (PO) ｎ In the above, the distribution (arrangement order) of EO and PO is not particularly limited, and they may be arranged in a block form or randomly.１７ -O-" or PO may be bonded to "R １７ Examples of a method for arranging EO and PO in a block form include a method of introducing ethylene oxide and then propylene oxide, a method of introducing propylene oxide and then ethylene oxide, and a method of introducing ethylene oxide, then propylene oxide, and then ethylene oxide.

[0050] The content of component (b1) is preferably 30 to 80% by mass, more preferably 40 to 60% by mass, and more preferably 40 to 50% by mass, relative to the total mass of component (B). When the content of component (b1) is equal to or greater than the above-mentioned lower limit, the detergency can be further improved and the anti-redeposition performance can be enhanced. When the content of component (b1) is equal to or less than the above-mentioned upper limit, the stability during storage (storage stability) can be enhanced. When the content of component (b1) is equal to or less than the above-mentioned lower limit, the detergency can be further improved and the anti-redeposition performance can be enhanced. When the content of component (b1) is equal to or less than the above-mentioned upper limit, the stability during storage (storage stability) can be enhanced.

[0051] When component (b1) contains LAS, the content of LAS is preferably 10 to 80% by mass, more preferably 20 to 60% by mass, relative to the total mass of component (B). When the content of LAS is equal to or greater than the above-mentioned lower limit, protein detergency and anti-soil redeposition ability can be improved. When the content of LAS is equal to or less than the above-mentioned upper limit, storage stability can be improved. When component (b1) contains AES, the content of AES is preferably 10 to 80% by mass, more preferably 20 to 60% by mass, relative to the total mass of component (B). When the content of AES is equal to or greater than the above-mentioned lower limit, detergency can be further improved.

[0052] The content of component (b1) relative to the total mass of component (b) is preferably 30 mass% or more, more preferably 40 mass% or more, and may be 100 mass%. When the content of component (b1) is equal to or more than the above lower limit, detergency can be further improved.

[0053] Component (b) may contain a surfactant (optional surfactant) other than component (b1). Examples of the optional surfactant include nonionic surfactants, cationic surfactants, semi-polar surfactants, and amphoteric surfactants. Of these, nonionic surfactants are preferred as the optional surfactant.

[0054] Examples of nonionic surfactants include polyoxyalkylene-type nonionic surfactants, alkylphenols, alkylene oxide adducts of fatty acids having 8 to 22 carbon atoms or amines having 8 to 22 carbon atoms, polyoxyethylene polyoxypropylene block copolymers, fatty acid alkanolamines, fatty acid alkanolamides, polyhydric alcohol fatty acid esters or alkylene oxide adducts thereof, polyhydric alcohol fatty acid ethers, alkyl (or alkenyl) amine oxides, alkylene oxide adducts of hydrogenated castor oil, sugar fatty acid esters, N-alkyl polyhydroxy fatty acid amides, alkyl glycosides, etc. Among these, polyoxyalkylene-type nonionic surfactants are preferred, and among these, a compound represented by the following formula (b21) (hereinafter also referred to as "compound (b21)") and a compound represented by the following formula (b22) (hereinafter also referred to as "compound (b22)") are more preferred.

[0055] The compound (b21) is a surfactant represented by the following formula (b21): １１ -O-[(EO) ｓ / (A １１ O) ｔ ]-(EO) ｕ -R １２ ...(b21) (In formula (b21), R １１ is a linear hydrocarbon group having 8 to 22 carbon atoms. １２ is a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, or an alkenyl group having 2 to 6 carbon atoms. EO is an oxyethylene group. s is a number from 3 to 25 indicating the average number of EO repeats. A １１ O represents at least one of PO (oxypropylene group) and BO (oxybutylene group). １１ is a number from 0 to 6 indicating the average number of repeats of O. u is a number from 0 to 20 indicating the average number of repeats of EO.

[0056] (b21) In the formula, R １１ The hydrocarbon group of R has 8 to 22 carbon atoms, preferably 10 to 18 carbon atoms, and more preferably 12 to 18 carbon atoms. １１ The hydrocarbon group of R is linear. １１ The hydrocarbon group may or may not have an unsaturated bond. １１ The carbon atom in R may be a primary or secondary carbon atom. １２ When R is an alkyl group, it has 1 to 6 carbon atoms, preferably 1 to 3 carbon atoms. １２ When R is an alkenyl group, it has 2 to 6 carbon atoms, preferably 2 to 3 carbon atoms. １２ is particularly preferably a hydrogen atom.

[0057] s is 3 to 25, preferably 5 to 25, more preferably 7 to 20, and even more preferably 7 to 18. t is 0 to 6, preferably 0 to 3. u is 0 to 20, preferably 0 to 15, and more preferably 0 to 10. s+u is preferably 3 to 30, more preferably 5 to 25, even more preferably 5 to 20, and particularly preferably 7 to 20.

[0058] When t is not 0, that is, when the compound (b21) has EO and PO, EO and BO, or EO, ​​PO and BO, [(EO) ｓ / (A １１ O) ｔ In the formula, the distribution (arrangement order) of EO and PO, EO and BO, or EO, ​​PO and BO is not particularly limited, and they may be arranged in a block form or randomly. １１ -O-" or PO or BO may be bonded to "R １１ However, when u is not 0, it may be bonded to [(EO) ｓ / (A １１ O) ｔ ] at the end of -(EO) ｕ A binds to １１ O, that is, PO or BO. When t is not 0, the compound (b21) preferably has EO and PO, or EO and BO.

[0059] An example of a commercially available product of compound (b21) is Lion Corporation's product name "LMAL-90" (in the formula (b21), R １１ are a linear alkyl group having 12 carbon atoms (D12, the number after D indicates the number of carbon atoms in the alcohol; the same applies below) and a linear alkyl group having 14 carbon atoms (D14) (mass ratio of D12:D14=75:25), and R bonded to the oxygen atom １１ The carbon atom in R is a primary carbon atom, １２ is a hydrogen atom, s is 12, t is 0, and u is 0), and trade name "Leox DL-70" manufactured by Lion Corporation (a mixture of an alcohol having 12 carbon atoms and an alcohol having 14 carbon atoms).

[0060] The compound (b22) is a compound represented by the following formula (b22): １３ -O-[(EO) ｖ / (A １２ O) ｗ ]-(EO) ｘ -R １４ ...(b22) (In the formula (b22), R １３ is a branched hydrocarbon group having 8 to 22 carbon atoms. １４ is a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, or an alkenyl group having 2 to 6 carbon atoms. EO is an oxyethylene group. v is a number from 3 to 25 indicating the average number of EO repeats. A １２ O represents at least one of PO (oxypropylene group) and BO (oxybutylene group). １２ x is a number from 0 to 6 that indicates the average number of repeats of EO. x is a number from 0 to 20 that indicates the average number of repeats of EO.

[0061] (b22) In the formula, R １３ The hydrocarbon group of R has 8 to 22 carbon atoms, preferably 10 to 18 carbon atoms, and more preferably 12 to 18 carbon atoms. １３ The hydrocarbon group of R is a branched chain. １３ The hydrocarbon group may or may not have an unsaturated bond. １３ The carbon atom in R may be a primary or secondary carbon atom. １４When R is an alkyl group, it has 1 to 6 carbon atoms, preferably 1 to 3 carbon atoms. １４ When R is an alkenyl group, it has 2 to 6 carbon atoms, preferably 2 to 3 carbon atoms. １４ is particularly preferably a hydrogen atom.

[0062] v is 3 to 25, preferably 5 to 18, more preferably 5 to 15, even more preferably 5 to 10, and particularly preferably 5 to 8. w is 0 to 6, preferably 0 to 3. x is 0 to 20, preferably 0 to 15, and more preferably 0 to 10. v+x is preferably 3 to 30, more preferably 5 to 25, even more preferably 5 to 20, particularly preferably 5 to 15, most preferably 5 to 10, and very preferably 5 to 8.

[0063] When w is not 0, that is, when the compound (b22) has EO and PO, EO and BO, or EO, ​​PO and BO, [(EO) ｖ / (A １２ O) ｗ In the formula, the distribution (arrangement order) of EO and PO, EO and BO, or EO, ​​PO and BO is not particularly limited, and they may be arranged in a block form or randomly. １３ -O-" or PO or BO may be bonded to "R １３ However, when x is not 0, it may be bonded to [(EO) ｖ / (A １２ O) ｗ ] at the end of -(EO) ｘ A binds to １２ O, that is, PO or BO. When w is not 0, compound (b22) preferably has EO and PO, or EO and BO.

[0064] Commercially available products of compound (b22) include, for example, compounds obtained by adding 3 to 10 moles of ethylene oxide to alcohols such as Diadol (registered trademark) (D13) manufactured by Mitsubishi Chemical Corporation, NeoCol (registered trademark) (a mixture of D12 and D13) manufactured by Shell, Safol (registered trademark) 23 (a mixture of D12 and D13) manufactured by Sasol, and EXXAL (registered trademark) 13 (D13); compounds obtained by adding 3, 5, or 7 moles of ethylene oxide to alcohol D13 obtained by subjecting an alkene having 12 carbon atoms obtained by trimerizing butene to the oxo method (Lutensol (registered trademark) TO3, Lutensol TO5, Lutensol TO7, manufactured by BASF); Examples of such an alcohol include a D13 alcohol obtained by subjecting an alkene having 12 carbon atoms, obtained by trimerizing butene, to the Oxo process, to which 12 or 15 moles of ethylene oxide have been added (Lutensol (registered trademark) TO12, Lutensol TO15, etc., manufactured by BASF); a D10 alcohol obtained by subjecting pentanol to the Guerbet reaction, to which 9 moles of ethylene oxide have been added (Lutensol XP90, manufactured by BASF); a D10 alcohol obtained by subjecting pentanol to the Guerbet reaction, to which 7 moles of ethylene oxide have been added (Lutensol XL70, manufactured by BASF); and a D10 alcohol obtained by subjecting pentanol to the Guerbet reaction, to which 6 moles of ethylene oxide have been added (Lutensol XA60, manufactured by BASF). Among these, Safol 23 (branching ratio: 50 mass%), a trade name of Sasol (produced by subjecting olefins obtained from coal gasification to an oxo process to obtain alcohol, which is then hydrogenated), and Neodol 23 (branching ratio: 20 mass%), a trade name of Shell Chemicals (produced by a modified oxo process from n-olefins and then rectified), are not compounds (b22) alone, but a mixture of compounds (b21) and (b22). Note that the "branching ratio" refers to the ratio of the R １１ R having —O— １１ —OH and R of compound (b22) １３ R having —O— １３R relative to the total amount of —OH １３ The proportion of --OH (mass %) is shown.

[0065] The nonionic surfactant may contain a compound represented by the following formula (b23) (hereinafter also referred to as "compound (b23)") as a polyoxyalkylene-type nonionic surfactant.

[0066] R １５ -X-[(EO) ｐ / (A １３ O) ｑ ]-(EO) ｒ -R １６ ...(b23) (In formula (b23), R １５ is a hydrocarbon group having 7 to 21 carbon atoms. -X- is -COO- or -CONH-. R １６ is a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, or an alkenyl group having 2 to 6 carbon atoms. EO is an oxyethylene group. p is a number from 3 to 25 that indicates the average number of EO repeats. A １３ represents at least one of PO (oxypropylene group) and BO (oxybutylene group). １３ is a number from 0 to 6 indicating the average number of repeats of EO. r is a number from 0 to 20 indicating the average number of repeats of EO.

[0067] (b23) In the formula, R １５ The hydrocarbon group of R has 7 to 21 carbon atoms, preferably 9 to 19 carbon atoms, and more preferably 11 to 19 carbon atoms. １５ The hydrocarbon group of R may be a straight chain or a branched chain. １５ The hydrocarbon group may or may not have an unsaturated bond. １５ The carbon atom in is a secondary carbon atom.

[0068] R １６ When R is an alkyl group, it has 1 to 6 carbon atoms, preferably 1 to 3 carbon atoms. １６ When R is an alkenyl group, it has 2 to 6 carbon atoms, preferably 2 to 3 carbon atoms. １６is particularly preferably an alkyl group. p is 3 to 25, preferably 5 to 20, more preferably 10 to 18, and even more preferably 12 to 18. q is 0 to 6, preferably 0 to 3. r is 0 to 20, preferably 0 to 15, and more preferably 0 to 10. p+r is preferably 5 to 30, more preferably 5 to 25, even more preferably 5 to 20, and especially preferably 10 to 20.

[0069] When q is not 0, that is, when the compound (b23) has EO and PO, EO and BO, or EO, ​​PO and BO, [(EO) ｐ / (A １３ O) ｑ In the formula, the distribution (arrangement order) of EO and PO, EO and BO, or EO, ​​PO and BO is not particularly limited, and they may be arranged in a block form or randomly. １５ -X-" or PO or BO may be bonded to "R １５ However, when r is not 0, [(EO) ｐ / (A １３ O) ｑ ] is bound to -(EO)r at the end of A １３ O, that is, PO or BO. When q is not 0, compound (b23) preferably has EO and PO, or EO and BO.

[0070] When component (b) contains a nonionic surfactant, the content of the nonionic surfactant is preferably 10% by mass or more, more preferably 15 to 40% by mass, and even more preferably 20 to 35% by mass, relative to the total mass of component (B). When the content of the nonionic surfactant is equal to or greater than the above-mentioned lower limit, detergency can be further enhanced and uneven cleaning can be suppressed. When the content of the nonionic surfactant is equal to or less than the above-mentioned upper limit, the storage stability of component (B) can be enhanced. When component (b) contains a nonionic surfactant, the content of the nonionic surfactant is preferably 8% by mass or more, more preferably 8 to 30% by mass, and even more preferably 15 to 20% by mass, relative to the total mass of the detergent composition. When the content of the nonionic surfactant is equal to or greater than the above-mentioned lower limit, detergency can be further enhanced and uneven cleaning can be suppressed. When the content of the nonionic surfactant is equal to or less than the above-mentioned upper limit, the storage stability of component (B) can be enhanced.

[0071] The content of component (b) is preferably 30% by mass or more, more preferably 30 to 60% by mass, and even more preferably 40 to 50% by mass, relative to the total mass of component (B). When the content of component (b) is equal to or greater than the above-mentioned lower limit, detergency can be further increased and uneven cleaning can be suppressed. When the content of component (b) is equal to or less than the above-mentioned upper limit, the storage stability of component (B) can be enhanced. The content of component (b) is preferably 20% by mass or more, more preferably 20 to 45% by mass, and even more preferably 30 to 40% by mass, relative to the total mass of the detergent composition. When the content of component (b) is equal to or greater than the above-mentioned lower limit, detergency can be further increased and uneven cleaning can be suppressed. When the content of component (b) is equal to or less than the above-mentioned upper limit, the storage stability of component (B) can be enhanced.

[0072] Component (b) may contain soap (higher fatty acid salt). When component (b) contains soap, the defoaming properties are enhanced. As the salt, from the viewpoint of making component (B) liquid, alkanolamine salts are preferred, and among these, monoethanolamine salts are preferred.

[0073] [Other Components] The component (B) may contain other components (optional component B) in addition to the component (b1) and water. Examples of optional component B include water, colorants, fragrances, pH adjusters, monohydric alcohols having 1 to 3 carbon atoms, plasticizers, polyhydric alcohols, enzymes, hydrotropes, pH adjusters, and antibacterial agents.

[0074] Examples of the plasticizer include glycerin, diglycerin, diethylene glycol, triethylene glycol, propylene glycol, dipropylene glycol, trimethylolpropane, polyethylene glycol, and polyvinylpyrrolidone.

[0075] When component (B) contains a plasticizer, the content of the plasticizer relative to the total mass of component (B) is preferably 10 to 40% by mass, more preferably 15 to 30% by mass. When the content of the plasticizer is equal to or greater than the above-mentioned lower limit, component (B) can be more easily dispersed in water. When the content of the plasticizer is equal to or less than the above-mentioned upper limit, dissolution of the water-soluble container when not in use can be more effectively prevented.

[0076] The content of optional component B is preferably 40% by mass or more, more preferably 40 to 70% by mass, and even more preferably 50 to 60% by mass, relative to the total mass of component (B). When the content of optional component B is equal to or greater than the above-mentioned lower limit, hardening of the film can be suppressed. When the content of optional component B is equal to or less than the above-mentioned upper limit, softening of the film can be suppressed. The content of optional component B is preferably 30% by mass or more, more preferably 30 to 50% by mass, and even more preferably 35 to 45% by mass, relative to the total mass of the cleaner composition. When the content of optional component B is equal to or greater than the above-mentioned lower limit, hardening of the film can be suppressed. When the content of optional component B is equal to or less than the above-mentioned upper limit, softening of the film can be suppressed.

[0077] When component (B) contains water, the content of water relative to the total mass of component (B) is preferably 5 to 25% by mass, more preferably 10 to 20% by mass. When the water content is equal to or greater than the above-mentioned lower limit, component (B) can be more easily dispersed in water. When the water content is equal to or less than the above-mentioned upper limit, dissolution of the water-soluble container when not in use can be more effectively prevented.

[0078] The content of component (B) is preferably 20 to 90 mass%, more preferably 50 to 85 mass%, and even more preferably 70 to 80 mass%, based on the total mass of the detergent composition. When the content of component (B) is equal to or greater than the above-mentioned lower limit, the appearance attractiveness can be improved. When the content of component (B) is equal to or less than the above-mentioned upper limit, the cleaning performance improving effect of component (A) (chelating agent) can be fully exerted.

[0079] The specific gravity of component (B) is preferably 1.00 to 1.20, more preferably 1.00 to 1.15, and even more preferably 1.00 to 1.10. When the specific gravity of component (B) is within the above range, a preferable porosity can be ensured even when the maximum amount of component (B) is contained in the second storage chamber.

[0080] The ratio of the volume of air in the second storage chamber to the total volume of the second storage chamber (hereinafter also referred to as porosity) is preferably 40% by volume or less, more preferably 30% by volume or less. If the porosity is equal to or less than the above upper limit, component (A) is more likely to be released into water faster than component (B). Furthermore, the porosity is preferably 8% by volume or more, more preferably 10% by volume or more. If the porosity is equal to or greater than the above lower limit, component (B) can be easily accommodated. In other words, the porosity of the second storage chamber is preferably 8 to 40% by volume, more preferably 10 to 30% by volume.

[0081] The mass ratio of component (A) / component (B) is preferably 0.1 to 4, more preferably 0.3 to 2. The ratio of [porosity of first storage chamber] / [porosity of second storage chamber] is preferably 1.2 to 11, more preferably 2.0 to 8.0. When this ratio is equal to or less than the upper limit, a sufficient amount of component (B) for cleaning can be accommodated. When this ratio is equal to or greater than the lower limit, hardness components can be sufficiently captured by component (A) before component (B) is released into water.

[0082] The proportion of the detergent composition is preferably 82 to 96% by mass, more preferably 90 to 95% by mass, based on the total mass of the detergent article. When the proportion of the detergent composition is equal to or greater than the lower limit, the film's undissolved portion can be improved. When the proportion of the detergent composition is equal to or less than the upper limit, the film's puncture strength can be improved.

[0083] The mass ratio expressed as [mass of water-soluble container] / [mass of detergent composition] is preferably 0.04 to 0.23, more preferably 0.04 to 0.15. When this mass ratio is equal to or greater than the lower limit, the puncture strength of the film can be improved. When this mass ratio is equal to or less than the upper limit, the undissolved film can be improved.

[0084] When the water-soluble container has a third storage chamber, for example, the third storage chamber may contain a solid component different from the component (A) contained in the first storage chamber, or a liquid component different from the component (B) contained in the second storage chamber. As the solid component, any of those listed as the component (A) may be used, or any of the solid components known as components of detergent compositions may be used. As the liquid component, any of those listed as the component (B) may be used, or any of the liquid components known as components of detergent compositions may be used.

[0085] The total volume of the storage chambers is preferably 1 to 60 mL, more preferably 3 to 30 mL, and even more preferably 5 to 25 mL. This range provides excellent usability during cleaning. The volume is measured by filling the storage chambers of the mold with water (specific gravity 1 g / mL) and measuring the weight of the water.

[0086] (Manufacturing Method) The cleaning article of the present invention is manufactured by a conventionally known manufacturing method. Component (A) is prepared by powder mixing. Component (b) and optional component B, if necessary, are mixed to prepare component (B). Using a mold having multiple recesses, a water-soluble film is placed to block the openings of the recesses. The pressure inside the recesses is reduced, and the water-soluble film is drawn into the recesses to form two or more storage compartments with open tops. Next, component (A) is placed in one storage compartment, and component (B) is placed in another storage compartment adjacent to the storage compartment containing component (A). Another wetted water-soluble film is then placed to block the openings of the storage compartments and seal them. In this way, a cleaning article is obtained in which component (A) is placed in the first storage compartment and component (B) is placed in the second storage compartment, with both storage compartments separated by a seal. The amount of component (A) to be placed is determined appropriately taking into account the composition of component (A), etc., and is, for example, 2 to 8 g. The amount of component (B) to be contained is determined appropriately taking into consideration the composition of component (B) and the like, and is, for example, 8 to 24 mL. The volume of the first storage chamber may be smaller than or the same as the volume of the second storage chamber. The volume of air in the first storage chamber is preferably larger than the volume of air in the second storage chamber.

[0087] (Method of Use) The method of using the detergent article of the present invention (method of washing the articles to be washed) is the same as the conventionally known washing method, except that the detergent article of the present invention is used.

[0088] Examples of items to be washed include textile products such as clothing, fabrics, sheets, curtains, and carpets.

[0089] The detergent article 1 and water are placed in the washing tub. The order of placing the items in the washing tub is not particularly limited; water (washing water) may be placed in the washing tub before the detergent article 1 is placed, or the detergent article 1 may be placed in the washing tub before water is placed. Either order results in the detergent article 1 being placed in water. The items to be washed may be placed in the washing tub in advance, or may be placed in the washing tub after water is placed in the washing tub.

[0090] When the detergent article 1 is immersed in water, the wall (water-soluble film) of the first storage chamber 10 begins to dissolve before the wall (water-soluble film) of the second storage chamber 20, and the component (A) in the first storage chamber 10 is released into the water. At this time, if the component (A) contains the component (a21), the coexistence of the component (a22) with the component (a21) increases the fluidity of the powder, and the component (a21) disperses quickly in the water. When the component (A) is released into the water, the component (a1) or the component (a21) in the component (A) captures hardness components (calcium, silica, etc.) in the water.

[0091] The time it takes for component (A) to begin to be released into water after the detergent article 1 is placed in water (release initiation time) is preferably within 20 seconds, more preferably within 10 seconds. If the release initiation time is equal to or less than the above upper limit, the hardness components can be sufficiently captured before component (B) is released into water. The lower limit of the release initiation time for component (A) is not particularly limited, but is substantially equal to or greater than 1 second. The release initiation time for component (A) can be adjusted by combining the material and thickness of the water-soluble film, etc. Furthermore, the inventors have found that it can also be adjusted by adjusting the porosity. Adjusting the porosity is the easiest and least costly method. For example, they have found that a smaller particle size of component (A) results in a larger porosity for the same amount of component (A), resulting in a faster release initiation time.

[0092] When component (A) contains component (a1), the content of component (a1) in water is preferably 50 to 200 ppm by mass.When component (A) contains component (a21), the content of component (a21) in water is preferably 50 to 200 ppm by mass.

[0093] Next, the wall of the second storage chamber 20 of the detergent article 1 in the water begins to dissolve, and the component (B) in the second storage chamber 20 is released into the water. Thus, the component (B) disperses in the water, and the water becomes a laundry liquid containing the component (b). Since the hardness components are sufficiently captured in this laundry liquid, the surface activity of the component (b) can be enhanced. Therefore, washing items with this laundry liquid further enhances the detergency.

[0094] The time it takes for component (B) to begin to be released into water after the detergent article 1 is placed in water (release initiation time) is preferably 30 to 180 seconds, more preferably 45 to 120 seconds. When the release initiation time is equal to or less than the upper limit, component (A) can sufficiently capture the hardness components before component (B) is released into water. When the release initiation time is equal to or less than the upper limit, the effective cleaning time is extended, further enhancing detergency. The release initiation time of component (B) can be adjusted by combining the water content and plasticizer content in component (B). For example, the release initiation time of component (B) can be extended by lowering the water / plasticizer ratio. The water / plasticizer ratio is preferably 1 / 8 to 1 / 2, more preferably 1 / 5 to 3 / 8. By extending the release initiation time of component (B), it becomes easier to clean stains that re-adhere to the item being washed after being removed.

[0095] The content of component (b) in water (in the washing liquid) is preferably 300 to 700 ppm by mass. When the content of component (b) is equal to or greater than the lower limit, the detergency can be further enhanced. When the content of component (b) is equal to or less than the upper limit, the rinsing time can be further shortened. The content of component (b1) in the washing liquid is preferably 100 to 300 ppm by mass.

[0096] After washing the items with the washing liquid containing the components (A) and (B), the washing liquid is discarded, and the items are rinsed with water, dehydrated, and dried.

[0097] As described above, according to the detergent article of the present embodiment, the component (A) can be released into water before the component (B), thereby further enhancing detergency.

[0098] (Other Embodiments) In the above-described embodiment, the cleaning agent article has two storage chambers, but the number of storage chambers may be three or more. The upper limit of the number of storage chambers is not particularly limited, but is preferably six or less, for example. FIG. 2 shows an example of a cleaning agent article having three storage chambers. The cleaning agent article 100 in FIG. 2 has a water-soluble container 102. The water-soluble container 102 has two opposing water-soluble films whose peripheries are sealed with a peripheral seal portion 104, and a storage chamber 103 is formed therein. The storage chamber 103 is partitioned into a first storage chamber 110, a second storage chamber 120, and a third storage chamber 130 by partition seal portions 106 and 108. In this embodiment, the first storage chamber 110 is located between the second storage chamber 120 and the third storage chamber 130 in the surface direction of the water-soluble container 102.

[0099] The detergent composition includes a powder component (A), a liquid component (B1), and a liquid component (B2). The powder component (A) is contained in a first storage chamber 110, the liquid component (B1) is contained in a second storage chamber 120, and the liquid component (B2) is contained in a third storage chamber 130.

[0100] The material and composition of the water-soluble container 102 are the same as the material and composition of the water-soluble container 2. The liquid component (B1) is the same as the liquid component (B). The liquid component (B2) is the same as the liquid component (B). The liquid components (B1) and (B2) may be the same or different. The volume of the third storage chamber may be smaller than or the same as the volume of the second storage chamber. It is preferable that the volume of air in the first storage chamber is larger than the volume of air in the second storage chamber and the volume of air in the third storage chamber. The volume of air in the third storage chamber may be smaller than or the same as the volume of air in the second storage chamber.

[0101] Although the cleaning article 100 contains a powder component in one storage chamber and a liquid component in two storage chambers, the present invention is not limited to this. The cleaning article 100 may contain a powder component in two storage chambers and a liquid component in one storage chamber. Therefore, when the cleaning article has three or more storage chambers, the liquid component may be contained in two or more storage chambers, or the powder component may be contained in two or more storage chambers.

[0102] The present invention will be described in detail below with reference to examples, but the present invention is not limited to the following description.

[0103] (Raw Materials Used) <Component (a1)> Sodium carbonate: Trade name "Soda Ash", manufactured by Sumitomo Shoji Chemical Co., Ltd. <Component (a21)> Citric acid: Trade name "DitriD ADiC", manufactured by Jthus Corporation. MGDA: Trade name "Trilon M Max BioBaseC Gran", manufactured by BASF Corporation. <Component (a22)> Zeolite: Trade name "Synthetic Zeolite, A-3", manufactured by Fujifilm Wako Pure Chemical Industries, Ltd. <Optional Component A> Glauber's salt: Trade name "Glaunium salt", manufactured by Nippon Chemical Industry Co., Ltd. <Component (b1)> LAS: Linear alkylbenzenesulfonic acid having an alkyl group having 10 to 14 carbon atoms, trade name "Lipon (registered trademark) LH-200", manufactured by Lion Specialty Chemicals. AES: Polyoxyalkylene alkyl ether sulfate (alkyl group carbon number 12 to 14, average number of added moles of EO: 2). Product name "ASDO 24-2 / 70", manufactured by AK DhemteDh. <Optional surfactants> AE: Plant-derived alcohol (mass ratio of C12 alcohol / C14 alcohol = 7 / 3) to which 7 moles of ethylene oxide have been added. In (b21), R １１ is a linear alkyl group having 12 carbon atoms (C12) and a linear alkyl group having 14 carbon atoms (C14) (mass ratio of C12:C14=70:30), R １２ is a hydrogen atom, and —O— is bonded to R １１A compound in which the carbon atom in is a primary carbon atom, s is 5, t is 0, and u is 0. Trade name "MONOPOL LAE7", manufactured by Tonan Synthetic Co., Ltd. Palm fatty acid: Trade name "Palm Fatty Acid", manufactured by P.T. Musim Mas. <Optional Component B> Propylene glycol: Trade name "Propylene glyDol InCustry PG-I", manufactured by SKD. Sorbitol: Trade name "C-Sorbitol", manufactured by PAIK KWANG InCustrial Co., Ltd. Glycerin: Trade name "Glycerin", LG Househol C & HealthDare. Monoethanolamine: Trade name "Monoethanolamine", manufactured by Nippon Shokubai Co., Ltd. Water: Trade name "Purified Water", manufactured by Kanto Chemical Co., Ltd.

[0104] (Evaluation Method) <Evaluation of Detergency> The reflectance of the fabric was measured using a color difference meter (manufactured by Nippon Denshoku Industries Co., Ltd., product name: SE-2000), and the reflectance R was calculated from the Hunter whiteness Z according to the following formula (1).

[0105] R=Z / 100...(1)

[0106] First, the reflectance of 10 wet artificially soiled cloths (purchased from the Laundry Science Association; hereinafter, also referred to as "soiled cloths") before washing was measured. These soiled cloths are generally used to evaluate sebum detergency. A Terg-O-Tometer (manufactured by U.S. Testing Co.) was used as a cleaning tester. According to the compositions shown in Tables 1 to 4, components (A) and (B) were dispersed in water at 15°C to achieve the washing liquid concentrations (by mass) shown in the tables, to prepare the washing liquid for each example. In the tables, the total of all components contained in component (A) was defined as 100% by mass, and the total of all components contained in component (B) was defined as 100% by mass. The components (A) and (B) were used in a mass ratio of 77:231 (component (A) / component (B) = 0.33). Ten soiled fabrics and charge fabrics (knitted fabrics cut into small pieces, thoroughly washed, rinsed, and dried) were placed in a washing tank, followed by the addition of washing liquid. The amount of charge fabric was set to a liquor ratio of 30:1. The wash time was 10 minutes. Items marked "X→Y" in the table were washed for 1 minute with a diluted solution of component (A), followed by 9 minutes of washing with component (B). Items marked "Y&X" in the table were washed for 10 minutes with a diluted solution of component (A) and component (B). The washing conditions were 10 minutes at 120 rpm at 15°C, followed by two 3-minute rinses with 900 mL of 4°C hard water at 15°C. The items were then dried. The reflectance R of the dried soiled fabrics (hereinafter also referred to as washed fabrics) was measured using a 460 nm filter, and the cleaning rate (unit: %, rounded to the nearest whole number) was calculated using the following formula (2): In the formula, K represents the absorption coefficient, S represents the scattering coefficient, and R represents the reflectance. The standard white cloth is the original white cloth (raw cloth) that has not been soiled, and the calculation was performed assuming that the reflectance R of the standard white cloth is 80. The larger the value of the cleaning rate obtained by the following formula (2), the higher the cleaning power.

[0107] Cleaning rate (%) = (soiled cloth K / S - cleaned cloth K / S) / (soiled cloth K / S - unsoiled cloth K / S) × 100 (2) [K / S = (1 - R / 100) ２ / (2R / 100)]

[0108] The average value of the cleaning rate of 10 soiled cloths was calculated, and the difference in the average cleaning power (cleaning power difference) Δ was calculated using the following formula (3). The value of the cleaning power difference Δ was classified according to the following evaluation criteria: Cleaning power difference Δ = (average cleaning power value of "X → Y") - (average cleaning power value of "Y & X") (3)

[0109] <Evaluation criteria> ◎: 2% or more. ○: 0% or more and less than 2%. ×: Less than 0%.

[0110] <Evaluation of the effect of inhibiting solidification> 3 g of component (A) from each example was placed in a container (50 mm x 20 mm) made of water-soluble film (product name "M8312", manufactured by Monosol LLC), and this was then placed in an aluminum-deposited pouch. In this state, the container was left to stand in a thermostatic chamber at 25°C for storage. After storage, the aluminum-deposited pouch was opened, and the component (A) inside the container was visually observed. The appearance stability of the powder component of each example was evaluated according to the following evaluation criteria. <Evaluation criteria> ⊚: No solidification occurred after 24 hours. ◯: Partial solidification occurred after 24 hours. ×: Overall solidification occurred after 24 hours.

[0111] (Examples 1 to 17, Comparative Examples 1 to 5) According to the compositions shown in Tables 1 to 4, the raw materials for component (A) were powder-mixed to obtain a powdered component (A). Furthermore, the raw materials for component (B) were mixed to obtain a liquid component (B). The resulting components (A) and (B) were evaluated for their detergency and solidification properties, and the results are shown in the tables. The blend amounts in the tables are pure content equivalents. Furthermore, components for which no blend amount is listed in the tables were not blended.

[0112]

[0113]

[0114]

[0115]

[0116] As shown in Tables 1 to 4, Examples 1 to 17 had a detergency difference Δ of 1 or more, and the solidification inhibition effect was rated as "◎" or "◯." Comparative Example 1, which contained neither the (a1) nor the (a21) component; Comparative Example 2, in which the content of the (a1) component was 1 mass% relative to the total mass of the (A) component; Comparative Example 3, in which the content of the (a21) component was 10 mass% relative to the total mass of the (A) component; and Comparative Example 5, which did not contain the (b1) component, all had a detergency difference Δ of less than 0. Comparative Example 4, in which the a22 / a21 ratio was 0.0001, and Comparative Example 5, which did not contain the (b1) component, all had a solidification inhibition effect rated as "×." These results confirmed that application of the present invention can further enhance detergency and achieve a solidification inhibition effect.

[0117] Experimental Example 1 A water-soluble container similar to the water-soluble container 2 in FIG. 2 was prepared using a water-soluble polyvinyl alcohol film (manufactured by Monosol LLC, product name "M8775," thickness 76 μm). 5 g of component (A) from Example 1 (specific gravity 2.54, porosity 68% by volume) was placed in the first storage chamber (volume 6.2 mL), and 7.5 g of component (B) from Example 1 (specific gravity 1.08, porosity 23% by volume) was placed in each of the second and third storage chambers (volume 9.0 mL), to prepare a detergent article. When the prepared detergent article was placed in 1 L of water, component (A) was released into the water 3 seconds after the addition, and component (B) was released into the water 1 minute later. Furthermore, the cleaning performance of the above detergent article was confirmed using the method described below, and it was confirmed that it had 61% detergency, which was equivalent to X→Y in Example 1.

[0118] Experimental Example 2 A water-soluble container similar to that shown in FIG. 1 was prepared using a water-soluble polyvinyl alcohol film (manufactured by Monosol LLC, product name "M8775," thickness 76 μm). A detergent article was prepared by placing 5 g of component (A) from Example 1 (specific gravity 2.54, porosity 50% by volume) in a first storage chamber (volume 4.0 mL) and 15 g of component (B) from Example 1 (specific gravity 1.08, porosity 40% by volume) in a second storage chamber (volume 40.5 mL). The prepared detergent article was placed in 1 L of water. 20 seconds after the placement, component (A) was released into the water, and 30 seconds later, component (B) was released into the water. Furthermore, the cleaning performance of the above detergent article was confirmed using the method described below. It was confirmed that the cleaning power was 60%, which was the same as that of X→Y in Example 1.

[0119] <Evaluation of Detergency (Detergency Rate)> First, the reflectance of 10 wet, artificially soiled cloths (purchased from the Laundry Science Association; hereinafter, also referred to as "soiled cloths") before washing was measured. These soiled cloths are generally used to evaluate sebum detergency. A Terg-O-Tometer (manufactured by U.S. Testing Co.) was used as a cleaning tester. Ten soiled cloths, charge cloths (knitted cloth cut into small pieces, thoroughly washed, rinsed, and dried; the amount of charge cloth was set so that the liquor ratio was 30 times), and the detergent articles shown in Experimental Examples 1 and 2 were placed in a washing tank, and washing was immediately started. The washing conditions were a rotation speed of 120 rpm, a temperature of 15°C, and 10 minutes. After washing, the cloths were rinsed twice for 3 minutes with 900 mL of 4°C CH hard water at 15°C, and then dried. The reflectance R of the dried washed cloth was measured using a 460 nm filter, and the cleaning rate for each cloth was calculated using the above formula (2). The average of the cleaning rates for the 10 soiled cloths was taken as the overall cleaning rate.

[0120] The detergent article for textile products encased in a water-soluble container of the present invention further enhances detergency and is excellent in inhibiting solidification of solid components.

[0121] 1, 100: Textile cleaning agent article contained in a water-soluble container 2, 102: Water-soluble container 10, 110: First storage chamber 20, 120: Second storage chamber 130: Third storage chamber

Claims

1. A water-soluble container-packed textile detergent article having a detergent composition and a water-soluble container, wherein the detergent composition comprises a powder component (A) and a liquid component (B), wherein the component (A) comprises at least one selected from the group consisting of components (a1) and (a2), wherein the component (a1) is a carbonate in an amount of 10% by mass or more relative to the total mass of the component (A), and the component (a2) is a combination of at least one chelating agent (a21) selected from hydroxycarboxylic acid chelating agents and aminocarboxylic acid chelating agents in an amount of 20% by mass or more relative to the total mass of the component (A), and 0.001 to 0.03 parts by mass of a water-insoluble powder (a22) per part by mass of the component (a21), wherein the component (B) is a liquid containing a surfactant (b) in an amount of 30 to 80% by mass relative to the total mass of the component (B), and the component (b) comprises a non-soap anionic surfactant (b1), The water-soluble container has at least a first storage chamber and a second storage chamber, the first storage chamber stores the component (A), and the second storage chamber stores the component (B), and when the water-soluble container-packaged textile cleaning article is placed in water, the component (A) is released into the water earlier than the component (B).

2. The water-soluble container-packed textile cleaning article according to claim 1, wherein the first storage chamber contains 50% or more by volume of air, and the second storage chamber contains 40% or less by volume of air.

3. The water-soluble container-packaged textile detergent article according to claim 1 or 2, wherein the specific gravity of component (A) is 1.50 to 4.00, and the specific gravity of component (B) is 1.00 to 1.

20.

4. A water-soluble container-packaged textile cleaning article according to claim 1, wherein the component (b1) comprises at least one selected from the group consisting of linear alkylbenzene sulfonic acid or a salt thereof, and polyoxyalkylene alkyl (alkenyl) ether sulfate or a salt thereof.

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