WO2023189922A1

WO2023189922A1 - Method for cleaning textile products

Info

Publication number: WO2023189922A1
Application number: PCT/JP2023/011165
Authority: WO
Inventors: 理中川; 渉上野
Original assignee: 花王株式会社
Priority date: 2022-03-31
Filing date: 2023-03-22
Publication date: 2023-10-05
Also published as: JP2023150473A; JP7309957B1

Abstract

Provided is method for cleaning textile products, wherein cleaning is performed by bringing water and a powder detergent composition containing 5-30 mass% of component (A) and 0.5 mass% or more of component (B) into contact with the textile products, and applying an external force to the textile products together with the powder detergent composition remaining undissolved on the textile products. Component (A): anionic surfactant. Component (B): anionic water-soluble polymer.

Description

How to wash textile products

The present invention relates to a method for cleaning textile products.

BACKGROUND ART There are two main types of cleaning methods for textile products such as clothing: hand washing and machine washing using a washing machine or the like. In recent years, washing machines have become more popular in Asia, but hand-washing is still widely practiced due to its cleaning power, economic efficiency, cultural background, and awareness of washing. Hand-washing allows the worker to wash while checking how much dirt has been removed, so it not only removes general dirt attached to the fibers, but also dirt that is difficult to remove, such as organic dirt such as sebum stains on the collar, and dirt on socks. It is also suitable for cleaning to remove inorganic dirt such as adhered mud. In hand-washing, many workers wash textile products using a detergent, such as a washing liquid obtained by dissolving a powdered detergent in water.

JP 2010-189488A discloses that 1 to 25 parts by mass of a predetermined layered clay mineral (b) and 1 to 25 parts by mass of a predetermined acid source particle (c) are added to 100 parts by mass of base detergent particles (a). and a detergent composition containing the detergent particles, wherein a layer containing the layered clay mineral (b) and the acid source particle (c) is formed on the surface of the base detergent particle (a), and a detergent composition containing the detergent particle. things are disclosed.
Further, Japanese Patent Publication No. 11-512483 discloses laundry particles comprising (a) a predetermined porous carrier and (b) a predetermined detergent. It is then disclosed that detergent compositions containing the laundry particles are suitable for machine and hand washing operations.
International Publication No. 2015/098265 discloses that one or more compounds selected from (a) a predetermined anionic surfactant, (b) a predetermined carboxylic acid, (c) an inorganic sulfate and an inorganic halogen compound, A powder cleaning composition containing a predetermined amount of protease granules and cellulase granules, and having a pH of 2.5 when diluted 300 times with water at 20°C. As described above, a powder detergent composition for use in hand-washing laundry, which has a molecular weight of 6.5 or less, has been disclosed.
Japanese Patent Application Publication No. 2001-520266 discloses that (a) a predetermined surfactant, (b) a predetermined builder system, and (c) an alkalinity system containing a predetermined carbonate at a predetermined content. A detergent composition suitable for manual laundering is disclosed containing:

Summary of the Invention Hand washing is a task that is accompanied by great physical and mental fatigue, and workers want to be able to finish the task as quickly as possible.
Therefore, there is a need for further improvement in the ability to clean stains that are difficult to remove, such as organic stains such as sebum stains on collars and inorganic stains such as mud on socks. Even if it is sufficient to wash the textile product, such hard-to-remove stains may make the remaining stains more noticeable, which may impair satisfaction with the finish quality of the textile product.
The present invention provides a method for cleaning textile products that is excellent in cleaning properties of textile products, particularly in cleaning sebum stains and mud stains attached to textile products.

The present invention involves contacting a textile product with water and a powder detergent composition containing the following component (A) in an amount of 5% by mass or more and 30% by mass or less and the following component (B) in an amount of 0.5% by mass or more, The present invention relates to a method for cleaning textile products, in which cleaning is performed by applying external force to the textile products together with the powdered detergent composition remaining dissolved on the textile products.
(A) Component: Anionic surfactant (B) Component: Anionic water-soluble polymer

According to the present invention, a method for cleaning textile products is provided that is excellent in cleaning properties of textile products, particularly in cleaning sebum stains and mud stains attached to textile products.

DETAILED DESCRIPTION OF THE INVENTION Surprisingly, the present invention provides a method for cleaning textile products using a cleaning liquid obtained by dissolving almost the entire amount of the powder cleaning composition. It has been discovered that the cleaning performance of textile products is improved by applying external force to textile products that contain water along with objects.
The reason why the method of cleaning textile products of the present invention improves the cleaning performance of textile products, especially the cleaning performance of sebum stains and mud stains attached to textile products, is not necessarily clear, but it is assumed as follows.
It is presumed that by applying component (B) to textile products at a high concentration, the dispersibility of solid stains such as sebum stains and mud stains and the effect of preventing re-contamination are improved, and the effects of the present invention are realized. .
To be more specific, solid dirt inside a textile product is difficult to apply mechanical force to during cleaning, and tends to remain inside the textile product. Therefore, in the method for cleaning textile products of the present invention, by applying an external force after bringing component (B) into contact with the textile product at a high concentration, the polymer is drawn into the gap between the textile product and the solid dirt. It is believed that when the textile product is then rinsed with water, the water and the polymer come into contact with each other, causing the polymer to swell, which acts to separate the textile product from the solid dirt. Furthermore, since such polymers have a high affinity for solid soils, it is believed that by rinsing with water, the solid soils will be washed away along with the polymer. As a result, the method for cleaning textile products of the present invention has the excellent effect of being able to significantly clean various stains attached to fibers, organic stains such as sebum stains attached to collars, and inorganic stains such as mud attached to socks. is thought to be expressed.
Note that the method for cleaning textile products of the present invention is not limited to the above mechanism of action.

The method for cleaning textile products of the present invention includes water, a powder cleaning composition containing the following component (A) in an amount of 5% by mass or more and 30% by mass or less, and the following component (B) in an amount of 0.5% by mass or more. are brought into contact with each other, and an external force is applied to the textile product together with the powder detergent composition present on the textile product to perform cleaning.
(A) Component: Anionic surfactant (B) Component: Anionic water-soluble polymer

<Powder cleaning composition>
First, the powder detergent composition used in the textile product cleaning method of the present invention will be explained in detail. The powder cleaning composition of the present invention is a powder cleaning composition for textile products, furthermore, a powder cleaning composition for textile products for application cleaning, furthermore a powder cleaning composition for textile products for application hand washing. good. In the present invention, application cleaning may mean cleaning by bringing the powdered cleaning composition into direct contact with the textile product.
The powder cleaning composition of the present invention contains the above-mentioned component (A) and component (B).

Component (A) is an anionic surfactant. Specific examples of component (A) include one or more anionic surfactants selected from the following components (a1), (a2), (a3) and (a4).
(a1) component: alkyl or alkenyl sulfate salt (a2) component: polyoxyalkylene alkyl or alkenyl ether sulfate salt having an alkyleneoxy group (a3) component: anionic surfactant having a sulfonic acid group (a4) component: Fatty acid having 12 to 24 carbon atoms or a salt thereof

Component (a1) is specifically one or more anions selected from alkyl sulfate salts in which the alkyl group has 10 to 18 carbon atoms and alkenyl sulfate salts in which the alkenyl group has 10 to 18 carbon atoms. Examples include surfactants. From the viewpoint of detergency, component (a1) is preferably one or more anionic surfactants selected from alkyl sulfate salts in which the alkyl group has 12 to 14 carbon atoms; One or more anionic surfactants selected from the following sodium alkyl sulfates are more preferred.

Component (a2) is specifically a polyoxyalkylene alkyl ether sulfate salt in which the alkyl group has 10 or more carbon atoms and 18 or less and the average number of added moles of alkylene oxide is 1 or more and 3 or less, and the alkenyl group has 10 or more carbon atoms. One or more anionic surfactants selected from polyoxyalkylene alkenyl ether sulfate salts having an average number of added moles of alkylene oxide of 1 or more and 3 or less are exemplified. Examples of the oxyalkylene group include one or more groups selected from oxypropylene groups and oxyethylene groups. From the viewpoint of detergency, component (a2) is preferably a polyoxyethylene alkyl ether sulfate salt having an average number of added moles of ethylene oxide of 1 or more and 2.2 or less, an alkyl group having 12 or more carbon atoms and 14 or less, and , polyoxyethylene alkyl ether sulfate salts having an average added mole number of ethylene oxide of 1 or more and 2.2 or less are more preferred, and their sodium salts are even more preferred.

The component (a3), an anionic surfactant having a sulfonate group, refers to an anionic surfactant having a sulfonate group as a hydrophilic group.
Component (a3) specifically includes an alkylbenzenesulfonate whose alkyl group has 10 to 18 carbon atoms, an alkenylbenzenesulfonate whose alkenyl group has 10 to 18 carbon atoms, and an alkyl group whose carbon number is 10 to 18. Alkanesulfonates having 10 to 18 carbon atoms, α-olefin sulfonates having 10 to 18 carbon atoms in the α-olefin moiety, α-sulfofatty acid salts having 10 to 18 carbon atoms in the fatty acid moiety, and One or more anionic surfactants selected from α-sulfofatty acid lower alkyl ester salts having 10 to 18 carbon atoms and having 1 to 5 carbon atoms in the ester moiety are mentioned. From the viewpoint of detergency, component (a3) is preferably an alkylbenzenesulfonate salt in which the alkyl group has 11 or more carbon atoms and 16 or less carbon atoms, and more preferably a sodium alkylbenzenesulfonate in which the alkyl group has 11 or more carbon atoms and 16 or less carbon atoms. The carbon atom of the alkyl group bonded to the benzene ring of the alkylbenzene sulfonate may be a secondary carbon atom.

Component (a4) is a fatty acid having 12 to 24 carbon atoms or a salt thereof. A fatty acid having 12 to 24 carbon atoms or a salt thereof is an anionic surfactant having an aliphatic hydrocarbon group having 11 to 23 carbon atoms as a hydrophobic group and a carboxylic acid or a salt thereof as a hydrophilic group. Specific examples of component (a4) include lauric acid, myristic acid, palmitic acid, palmitoleic acid, stearic acid, oleic acid, elaidic acid, linoleic acid, linolenic acid, and salts thereof.

Examples of the salt of the anionic surfactant which is component (A) include alkali metal salts such as sodium and potassium salts, alkaline earth metal salts such as magnesium, alkanolamine salts having 2 to 8 carbon atoms, etc. Alkali metal salts are preferred, sodium or potassium salts are more preferred, and sodium salts are even more preferred.

From the viewpoint of detergency and foaming, the powder cleaning composition of the present invention preferably contains one or more anionic surfactants selected from the components (a3) as the component (A), and It is more preferable to contain one or more anionic surfactants selected from alkylbenzene sulfonates having a carbon number of 10 to 18 and alkenylbenzene sulfonates having an alkenyl group of 10 to 18 carbon atoms. It is further preferable to contain one or more anionic surfactants selected from alkylbenzene sulfonates having 10 or more and 18 or less carbon atoms.
In the powder cleaning composition of the present invention, the proportion of the alkylbenzenesulfonate having an alkyl group having 10 to 18 carbon atoms is preferably 50% by mass or more based on the total component (A) contained in the cleaning composition. , more preferably 60% by mass or more, still more preferably 70% by mass or more, and preferably 100% by mass or less.

The molecular weight of component (A) is preferably 100 or more, more preferably 200 or more, from the viewpoint of detergency and foaming, and preferably 1,000 or less, more preferably 500 or less, and even more preferably may be 400 or less.

Component (B) is an anionic water-soluble polymer. As component (B), one type of polymer may be used alone, or a plurality of types of polymers may be used in combination. Component (B) may be an anionic dispersant polymer.

Here, the term "water-soluble" of a water-soluble polymer refers to one in which the water-insoluble content measured by the following method is 0.5% or less.

<Measurement method of water-insoluble content>
In a 1,000 mL beaker, 1 g of polymer is dissolved in 499 g of water at 25° C. by stirring for 5 hours. The obtained aqueous polymer solution is filtered using a mesh having an opening of 100 μm that has been weighed in advance, and is further washed from above with 500 mL of water at 25° C. The residue together with the mesh is dried in a vacuum dryer at 120° C. for 6 hours, and the water-insoluble amount is determined by the following formula (I).
Water-insoluble amount (%) = [Amount of polymer residue after drying (g)] / [Amount of polymer when dissolved (g)] x 100 (I)

Examples of the anionic water-soluble polymer of component (B) include polymers containing monomer units having a carboxy group or a salt thereof, and polymers containing monomer units having a sulfonic acid group or a salt thereof. Among these anionic water-soluble polymers, polymers containing a monomer unit having a carboxy group or a salt thereof are preferred from the viewpoint of affinity with solid dirt (particularly mud particles).

Polymers containing monomer units having a carboxy group or a salt thereof include polymers containing monomer units derived from carboxylic acid compounds having polymerizable unsaturated bonds, such as acrylic acid, methacrylic acid, and maleic acid; Natural polymers having monomer units derived from sugars having a carboxy group such as galagturonic acid and polymers obtained by carboxylating polysaccharides having monomer units derived from sugars such as cellulose can be mentioned. Specifically, polyacrylic acid, acrylic acid/maleic acid copolymer, acrylic acid/acrylamidomethylpropanesulfonic acid copolymer, styrene/maleic acid copolymer, olefin/maleic acid copolymer, and their alkali metals. Alternatively, salts of alkanolamines having a molecular weight of 150 or less may be mentioned. Examples of natural or naturally derived polymers include chitansan gum, alginic acid, carboxymethyl cellulose (generally referred to as CMC), and their alkali metal or alkanolamine salts having a molecular weight of 150 or less.

As the alkali metal salt, sodium salts and potassium salts are preferred. Examples of alkanolamine salts having a molecular weight of 150 or less include monoethanolamine salts, diethanolamine salts, triethanolamine salts, and N-methylmonoethanolamine salts, with monoethanolamine salts being more preferred. The anionic water-soluble polymer may be a copolymer having monomer units of a nonionic water-soluble polymer, for example, a PEG chain may be branched to a part of the carboxy group of the polyacrylic acid chain. Conversely, polymers in which polyacrylic acid chains are branched from PEG chains are also included in this category. As an example of such a polymer, reference may be made to, for example, JP-A No. 2010-275468.

Examples of the anionic polymer containing a monomer unit having a sulfonic acid group or a salt thereof include polystyrene sulfonic acid or a salt thereof. In the case of polystyrene sulfonic acid or a salt thereof, it can be obtained by sulfonating polystyrene, and depending on the ratio of sulfonation, it may be a polystyrene/styrene sulfonic acid copolymer or a salt thereof. In addition, the preferable salt is the same as the anionic water-soluble polymer having a carboxy group described above.

From the viewpoint of availability and cleanability, preferred polymer components include sodium carboxymethylcellulose, sodium alginate, sodium polyacrylate, sodium polystyrene sulfonate, sodium acrylic acid/sodium maleate, sodium acrylic acid/acrylamidomethylpropanesulfonate, and Mention may be made of olefin/sodium maleate.

Component (B) is preferably one or more selected from carboxymethylcellulose, acrylic acid/maleic acid copolymer, acrylic acid/acrylamidomethylpropanesulfonic acid copolymer, and salts thereof. When component (B) is a salt, examples include salts of alkali metals or alkanolamines having a molecular weight of 150 or less. As the alkali metal salt, sodium salt and potassium salt are preferred. Examples of alkanolamine salts having a molecular weight of 150 or less include monoethanolamine salts, diethanolamine salts, triethanolamine salts, and N-methylmonoethanolamine salts, with monoethanolamine salts being more preferred.

The weight average molecular weight of component (B) is preferably 1,000 or more, more preferably 5,000 or more, still more preferably 10,000 or more, and preferably 2,000 or more, from the viewpoint of particle redeposit prevention. ,000 or less, more preferably 1,000,000 or less, still more preferably 700,000 or less.
The weight average molecular weight of component (B) is preferably 1,000 or more and 2,000,000 or less, more preferably 5,000 or more and 1,000,000 or less, even more preferably 10,000 or more and 700,000 or less.
This weight average molecular weight can be measured according to the method for measuring weight average molecular weight described below.
<Method for measuring weight average molecular weight>
The weight average molecular weight of the component (B) can be measured by GPC (gel permeation chromatography), and the weight average molecular weight (Mw) can be determined using a conversion standard substance. The GPC measurement conditions are shown below.
・Column: Manufactured by Tosoh Corporation, product name: TSK-GEL guard PWXL
Manufactured by Tosoh Corporation, product name:TSK-GEL G4000 PWXL
Manufactured by Tosoh Corporation, product name:TSK-GEL G2500 PWXL
・Mobile phase: 0.1 mol/L potassium dihydrogen phosphate and 0.1 mol/L sodium dihydrogen phosphate aqueous solution/acetonitrile = 90/10 (volume ratio)
・Detector: Differential refractive index detector ・Column temperature: 40℃
・Flow rate: 1.0mL/min
・Conversion standard material: Polyacrylic acid [manufactured by American Standard Corporation]
- Sample: Add ion-exchanged water to a polymer aqueous solution containing 0.8 g of solid content to prepare a total liquid volume of 200 mL, then take 10 μL from this prepared solution and inject it into the column.

<Composition and other ingredients>
The powder cleaning composition of the present invention contains component (A) in an amount of 5% by mass or more, preferably 10% by mass or more, more preferably 12.5% by mass or more, still more preferably 15% by mass or more, from the viewpoint of detergency and foaming. The content is at least 30% by mass, preferably at most 25% by mass, more preferably at most 22.5% by mass, even more preferably at most 20% by mass, from the viewpoint of foam breakage. In the present invention, when component (A) can take the form of acid type and salt type, the content of component (A) is a value converted to sodium salt.
The powder cleaning composition of the present invention contains component (A) in an amount of 5% by mass or more and 30% by mass or less, preferably 10% by mass or more and 25% by mass or less, more preferably The content is 12.5% by mass or more and 22.5% by mass or less, more preferably 15% by mass or more and 20% by mass or less.

The powder cleaning composition of the present invention contains component (B) in an amount of 0.5% by mass or more, preferably 0.8% by mass or more, more preferably 1.0% by mass or more, from the viewpoint of improving cleaning performance, and From the viewpoints of cost and formulation, the content is preferably 10% by mass or less, more preferably 8% by mass or less, still more preferably 6% by mass or less, even more preferably 4% by mass or less. In addition, in the present invention, when component (B) can take the form of acid type and salt type, the content of component (B) is a value converted to sodium salt.
In the powder cleaning composition of the present invention, the component (B) is preferably 0.5% by mass or more and 10.0% by mass or less, more preferably 0.8% by mass, from the viewpoint of improving cleaning performance, cost, and formulation. % or more and 8.0% by mass or less, more preferably 1.0% by mass or more and 6.0% by mass or less.

The powder cleaning composition of the present invention may optionally contain (C) a clay mineral [hereinafter referred to as component (C)].
Examples of the clay mineral of component (C) include smectite clay minerals. Examples of the smectite clay mineral include, but are not limited to, saponite, hectorite, sauconite, stevensite, montmorillonite, beidellite, nontronite, and the like.

In addition, although the component (C) is not particularly limited, it is preferable to include, for example, a clay mineral represented by the following general formula (c1).
[Si ₈ (Mg _a Al _b ) O ₂₀ (OH) ₄ ] ^X-・Me ^X+ (c1)
(In the formula, 0<a≦6, 0<b≦4, x=12-2a-3b, and Me is at least one of Na, K, Li, Ca, Mg and _NH4 , preferably is at least one of Na and Ca.)

The average particle size of the smectite clay mineral is preferably 50 μm or less, more preferably 30 μm or less, even more preferably 20 μm or less, and preferably 1 μm or more, more preferably 5 μm or more, from the viewpoint of comfort during coating and cleaning work. More preferably, it is 10 μm or more.
The average particle size of the smectite clay mineral is preferably 1 μm or more and 50 μm or less, more preferably 5 μm or more and 30 μm or less, and even more preferably 10 μm or more and 20 μm or less, from the viewpoint of comfort during coating and cleaning operations.

The average particle size of the smectite clay mineral can be measured using, for example, a laser diffraction/scattering particle size distribution measuring device equipped with a dry measuring unit. Specifically, measurement can be performed by connecting an optional dry measurement unit G0310630 to Partica LA-950 (manufactured by Horiba, Ltd.) using the Mie scattering method. The compressed air settings for powder dispersion were normal and measured.

Examples of smectite-type clay minerals include "bentonite", "Detasoft GIS", "Detasoft GIB", and "Detasoft GISW" manufactured by Raviossa, "Odosolve K-400" manufactured by Kurosaki Hakudo Kogyo Co., Ltd., and Sud. Examples include "Round Rosil DGA212", "Round Rosil PR414", "Round Rosil DG214", "Round Rosil DGA Powder", and "Furasoft-1 Powder" manufactured by Chemi Corporation, and Pure Bentonite, Standard Bentonite, and Premium Bentonite manufactured by CSM.

The powder cleaning composition of the present invention contains component (C) in an amount of preferably 1% by mass or more, more preferably 2% by mass or more, still more preferably 3% by mass or more, from the viewpoint of comfort during application and cleaning work, and , preferably 15% by mass or less, more preferably 12% by mass or less, still more preferably 10% by mass or less.
In the powder cleaning composition of the present invention, the component (C) is preferably 1% by mass or more and 15% by mass or less, more preferably 2% by mass or more and 12% by mass or less, from the viewpoint of comfort during application and cleaning work. Preferably, it can be contained in a range of 3% by mass or more and 10% by mass or less.

In the powder cleaning composition of the present invention, the mass ratio (B)/(C) of the content of component (B) and the content of component (C) is determined from the viewpoint of particle cleaning performance and comfort during application cleaning work. , preferably 0.08 or more, more preferably 0.16 or more, even more preferably 0.24 or more, and preferably 2 or less, more preferably 1.33 or less, still more preferably 1.00 or less, even more preferably is 0.50 or less.
After the content of component (B) and component (C) satisfies the above range, the mass ratio (B)/(C) of the content of component (B) and the content of component (C) is within the above range. It is preferable that

The powder cleaning composition of the present invention can optionally contain (D) one or more compounds selected from inorganic sulfates and inorganic halogen compounds [hereinafter referred to as component (D)]. Component (D) is not only used as a skeleton for forming the powder cleaning composition, but also has the effect of reducing irritation caused by surfactants by protecting hands during hand washing.
Component (D) is not particularly limited as long as it is an inorganic sulfate or an inorganic halogen compound. For example, from the viewpoint of protecting hands, a compound selected from sodium sulfate, magnesium sulfate, sodium chloride, and magnesium chloride is preferred. preferable. Component (D) may be a hydrate or an anhydride.

The powder cleaning composition of the present invention preferably contains one or more compounds selected from inorganic sulfates as component (D). The proportion of inorganic sulfate in component (D) is 100% by mass or less than 100% by mass, preferably 97% by mass or less, and preferably 60% by mass or more, more preferably 70% by mass. % or more, more preferably 80% by mass or more, even more preferably 90% by mass or more.
Moreover, it is more preferable that the powder cleaning composition of the present invention contains at least sodium sulfate as component (D). The proportion of sodium sulfate in component (D) is 100% by mass or less than 100% by mass, preferably 97% by mass or less, and preferably 60% by mass or more, more preferably 70% by mass. The content is more preferably 80% by mass or more, even more preferably 90% by mass or more.
Component (D) can be contained as the remainder after removing component (A), component (B), component (C), and other optional components.

The powder cleaning composition of the present invention can contain a crystalline aluminosilicate other than the component (C) as the component (E). Examples of component (E) include zeolite. Component (E) is generally used to improve the cleaning properties of stains adhering to textile products.

Examples of component (E) include zeolite. Specific examples of zeolites include crystalline aluminosilicates such as A-type, X-type, and P-type zeolites. The average primary particle diameter of component (E) is preferably 0.1 μm or more, more preferably 1 μm or more, and preferably 10 μm or less, more preferably 5 μm or less. Component (E) is preferably A-type zeolite (for example, trade name "TOYOBUILDER" manufactured by Tosoh Corporation, oil absorption capacity according to JIS K 5101 method: 40 mL/100 g or more), and P-type (for example, product name "Doucil A24", "ZSEO64", etc.; both made by Crosfield; oil absorption capacity 60-150 mL/100 g), type X (for example, product name "Wessalith The hybrid zeolite described in International Publication No. 9842622 is also suitable.

In the powder cleaning composition of the present invention, the component (E) is preferably 1% by mass or more, more preferably 3% by mass or more, still more preferably 5% by mass or more, from the viewpoint of cleaning aid in coating and cleaning work. From the viewpoint of visibility of stain removal during coating and cleaning work, the content is preferably 20% by mass or less, more preferably 17.5% by mass or less, still more preferably 15% by mass or less.
In the powder cleaning composition of the present invention, the component (E) is preferably 1% by mass or more and 20% by mass or less, more preferably 3% by mass, from the viewpoint of cleaning aid in coating cleaning work and visibility of stain removal. The content can be 17.5% by mass or less, more preferably 5% by mass or more and 15% by mass or less.

The powder cleaning composition of the present invention optionally contains (F) one or more alkaline agents selected from alkali metal carbonates, alkali metal hydrogen carbonates, alkali metal silicates, and tripolyphosphates [hereinafter referred to as (F) component].

Examples of the alkali metal carbonate include sodium carbonate and potassium carbonate, with sodium carbonate being preferred.
Examples of the alkali metal hydrogen carbonate include sodium hydrogen carbonate and potassium hydrogen carbonate.
Examples of alkali metal silicates include sodium silicate and potassium silicate.
As the tripolyphosphate, an alkali metal salt of tripolyphosphoric acid is preferable, and sodium tripolyphosphate is more preferable.

The powder cleaning composition of the present invention can contain an alkali metal carbonate as the component (F).

The powder cleaning composition of the present invention may optionally contain a bleaching agent (perborate, bleach activator, etc.), a redeposition inhibitor, a softening agent (cationic activator, etc.), a reducing agent, an optical brightener, etc. , foam suppressants (silicone, polysiloxane, etc.), fragrances, enzymes (cellulase, protease, peptinase, lipase, dextranase, amylase, etc.), colorants, and the like.

<Method for manufacturing powder cleaning composition>
The powder cleaning composition of the present invention can be manufactured by applying a known method. For example, spray drying method, dry neutralization method, for example, dry neutralization method described in Japanese Patent No. 3313372, dry granulation method, dry blending method, fluidized bed drying method, thin film drying method, extrusion granulation method, rolling granulation method. It can be manufactured by applying a granulation method, a stirring granulation method, a consolidation granulation method, a surfactant loading method, or a combination thereof. Among these, the powder cleaning composition of the present invention is preferably produced by a dry neutralization method because of its high bulk density. The dry neutralization method is a production method that includes a dry neutralization step of neutralizing an acid precursor of an anionic surfactant with an alkali agent. The powder cleaning composition of the present invention was produced by a manufacturing method including a dry neutralization step in which the acid precursor of an anionic surfactant is mixed with a particulate alkaline agent to neutralize the acid precursor. Preferably.

<How to wash textile products>
Next, the method for cleaning textile products of the present invention will be explained. In the method for cleaning textile products of the present invention, textile products can be cleaned using the powder detergent composition of the present invention. The powder detergent composition used in the textile product cleaning method of the present invention contains the above-mentioned components (A) and (B), and can optionally contain components (C) to (F). In addition, in the powder cleaning composition used in the textile product cleaning method of the present invention, preferred embodiments and preferred contents of components (A) to (F) are as described in the powder cleaning composition of the present invention above. is the same as

The method for cleaning textile products of the present invention includes a powder cleaning composition containing water, 5% by mass or more of the above component (A) and 30% by mass or less, and 0.5% by mass or more of the above component (B), for the textile product. are brought into contact with each other, and an external force is applied to the textile product together with the powder detergent composition present on the textile product to perform cleaning.
In the textile product cleaning method of the present invention, the presence of the powder cleaning composition on the textile product may be a state in which it can be visually confirmed that the powder cleaning composition remains dissolved on the textile product. .
Specifically, the presence of a powder detergent composition in a textile product means that when the textile product is observed at a magnification of 30x with a digital microscope (VHX7000, manufactured by Keyence Corporation), the powder detergent composition is present in the textile product. It may be in a state where any of powder particles, crystals, and insoluble matter can be confirmed.

Further, the method for cleaning textile products of the present invention includes water, the above-mentioned (A) component being 5% by mass or more and 30% by mass or less, and the above-mentioned (B) component being 0.5% by mass or more, and the above-mentioned water The method for cleaning textile products may include contacting the textile product with a powder detergent composition that exceeds the saturated dissolution amount in the textile product and applying external force to the textile product. It is preferable to contact the textile product with water and the powdered detergent composition, and apply an external force to the textile product together with the powdered detergent composition present on the textile product, thereby cleaning the textile product.
The saturated dissolution amount in water is the limit mass of the powder cleaning composition that can be dissolved in the water. The saturated solubility in water can be determined from the solubility of the powder detergent composition in water at a predetermined temperature and the mass of water brought into contact with the textile product. The solubility of a powder detergent composition in water is determined from the maximum mass of the powder detergent composition that dissolves in 100 g of water at a given temperature (eg, 25° C.).

Further, the method for cleaning textile products of the present invention includes water and a powder cleaning agent containing water and the above component (A) in an amount of 5% by mass or more and 30% by mass or less and the above component (B) in an amount of 0.5% by mass or more. A method for cleaning a textile product, which comprises contacting the textile product with a composition and applying an external force to the textile product together with the powdered detergent composition present on the textile product without substantially adding any further water. It may be.

Here, the method for cleaning textile products of the present invention will be explained in detail by giving specific examples. The method for cleaning textile products of the present invention is not limited to the specifically illustrated embodiments. For example, Step 1 and Step 2 below may be performed at the same time or after Step 2.

The method for cleaning textile products of the present invention includes a step of bringing water into contact with the textile product (step 1), a step of bringing the powdered cleaning composition into contact with the textile product that has been in contact with water (step 2), and A method for cleaning textile products includes a step (step 3) of applying an external force to the textile products together with a powdered cleaning composition to wash the textile products.

Step 1 is a step of bringing water into contact with the textile product, that is, bringing water into contact with a soiled part of the textile product to wet the soiled part of the textile product with water. The water may be tap water, well water, river water, lake water, etc.

The amount of water that is contacted with the textile in step 1 is adjusted based on the weight of the powder cleaning composition that is contacted with the textile in step 2. For example, in step 1, from the viewpoint of detergency, the amount of the powder cleaning composition that is brought into contact with the textile product in step 2 is preferably 0.100 g or more, more preferably 0.120 g or more, more preferably 0.125 g or more, even more preferably 0.250 g or more, even more preferably 0.375 g or more, and preferably 1.000 g or less from the viewpoint of stain visibility during coating and cleaning. , more preferably 0.750 g or less, still more preferably 0.500 g or less, the textile product can be brought into contact with water.
In step 1, the powder cleaning composition applied in step 2 is preferably 0.100 g or more per 1 g of water contacted in step 1 from the viewpoint of cleaning performance and dirt visibility during application and cleaning. Add water to the textile product so that the weight is 0.000 g or less, more preferably 0.120 or more and 0.750 or less, even more preferably 0.125 or more and 0.750 or less, even more preferably 0.250 or more and 0.500 or less. can be brought into contact.

The German hardness of the water used in step 1 is preferably 2° dH or higher, more preferably 4° dH or higher, even more preferably 6° dH or higher, and preferably 30° dH or lower, from the viewpoint of particle cleaning performance. , more preferably 25°dH or less, still more preferably 15°dH or less.

In the present invention, German hardness (°dH) refers to the concentration of calcium and magnesium in water, calculated as CaCO ₃ equivalent concentration, 1 mg/L (mg/kg) = approximately 0.056°dH (1°dH = 17.8 mg/kg). kg). The German hardness of water used for cleaning can be adjusted, for example, based on a value calculated from the type and amount of hardness components added. In addition, when water of unknown hardness, such as tap water, is used for washing, the German hardness of the water can be determined by the chelate titration method using ethylenediaminetetraacetic acid disodium salt described below. . The specific method for measuring the German hardness of water is shown below.
<How to measure the German hardness of water>
〔reagent〕
・0.01 mol/L EDTA/2Na solution: 0.01 mol/L aqueous solution of disodium ethylenediaminetetraacetate (titration solution, 0.01M EDTA-Na2, manufactured by Sigma-Aldrich)
・Universal BT indicator (product name: Universal BT, manufactured by Dojindo Laboratories Co., Ltd.)
・Ammonia buffer solution for hardness measurement (a solution in which 67.5 g of ammonium chloride was dissolved in 570 mL of 28 w/v% ammonia water and the total volume was made up to 1,000 mL with ion-exchanged water)
[Measurement of German hardness]
(1) Collect 20 mL of water as a sample into a conical beaker using a whole pipette.
(2) Add 2 mL of ammonia buffer for hardness measurement.
(3) Add 0.5 mL of Universal BT indicator. Confirm that the solution is reddish-purple after addition.
(4) While shaking the conical beaker well, add 0.01 mol/L EDTA/2Na solution dropwise from the burette, and the end point of the titration is when the sample water turns blue. (5) The total hardness is calculated using the following formula.
Hardness (°dH) = T x 0.01 x F x 56.0774 x 100/A
T: Titration amount (mL) of 0.01 mol/L EDTA/2Na solution
A: Sample volume (20 mL, sample water volume)
F: Factor of 0.01mol/L EDTA/2Na solution

The German hardness of not only the water used in step 1 but also the water used in other steps (for example, the process of washing textile products in a washing machine, the process of rinsing textile products, etc.) It is preferable to have a German hardness similar to that of German hardness.

Step 2 is a step of bringing the powder cleaning composition into contact with the textile product that has come into contact with water, specifically, the portion of the textile product that has come into contact with water. For example, the powder detergent composition can be brought into contact with the textile product by applying or pouring the powder detergent composition onto the textile product.
Step 2 may be a step of contacting the powder detergent composition in an amount exceeding the saturation solubility in the water contacted in Step 1. Further, the powder cleaning composition is a powder cleaning composition containing 5% by mass or less of an anionic surfactant as component (A) and 30% by mass or less of an anionic surfactant as component (A) and 0.5% or more by mass of a water-soluble polymer as component (B). It may be a composition.

In step 2, from the viewpoint of application and cleaning properties, the concentration of the powder cleaning composition in the water contained in the textile product, that is, the concentration of the powder cleaning composition in the water in which the powder cleaning composition is dissolved in the textile product, is preferably is more than 5% by mass, more preferably 10% by mass or more, even more preferably 20% by mass or more, and from the viewpoint of comfort during coating and cleaning work, preferably 80% by mass or less, more preferably 70% by mass or less, More preferably, the powder cleaning composition is brought into contact with the textile product in an amount of 60% by mass or less. In addition, in the present invention, the concentration of the powder detergent composition mentioned above can be regarded as the concentration of the powder detergent composition dissolved in the water brought into contact with the textile product in step 1 as the concentration of the powder detergent composition in water. . The mass of the powder detergent composition dissolved in water is calculated by subtracting the mass of the powder detergent composition remaining dissolved from the mass of the powder detergent composition brought into contact with the textile product.
In step 2, from the viewpoint of achieving both application cleanability and comfort during application and cleaning work, the powder cleaning agent composition concentration of water contained in the textile product is preferably more than 5% by mass and 80% by mass or less, more preferably The powder cleaning composition is brought into contact with the textile product in an amount of 10% by mass or more and 70% by mass or less, more preferably 20% by mass or more and 60% by mass or less.

In addition, the powder detergent composition is added to the textile products so that the amount of the powder detergent composition that is contacted with the textile products in step 2 is within the range described in step 1 above, per 1 g of water that was brought into contact with the textile products in step 1. By bringing the powder into contact with the powder detergent composition, the concentration of the powder detergent composition in the water contained in the textile product can be kept within the above range.

In Steps 2 and 3, the pH of the water brought into contact with the textile product and in which the powder cleaning composition is dissolved is preferably 9.5 or higher at 25° C. from the viewpoint of particle application and cleaning properties. More preferably 10 or more, still more preferably 10.5 or more, and from the viewpoint of safety to hand skin, preferably 13 or less, more preferably 12.5 or less, still more preferably 12 or less. Note that the pH in the present invention is measured by a glass electrode method. Specifically, the pH of the water in which the powder cleaning composition was dissolved was measured by the following method.
<Method for measuring pH>
A pH electrode (model 6367) was placed in advance on a Horiba pH meter (D-52) with phthalate buffer (pH 4.01), phosphate standard solution (pH 6.84), and borate standard solution (pH 9.18). Calibrate and rinse thoroughly with deionized water. The pH electrode calibrated and cleaned as described above is placed in water in which the powder cleaning composition is dissolved and the temperature is adjusted to 25° C., and the pH electrode is measured using the AUTO HOLD mode of the pH meter until the measured value becomes constant.
Note that the pH of 15 g of the powder detergent composition dissolved in 40 g of ion-exchanged water at 25° C. can be regarded as the pH at 25° C. of the water in which the powder detergent composition in the textile product is dissolved.

Step 3 is a step in which external force is applied to the textile product together with the powder detergent composition present on the textile product to perform cleaning. Step 3 may be a step in which cleaning is performed by applying an external force to the textile product together with the powdered cleaning composition present on the textile product without substantially adding additional water.

In the present invention, "without substantially adding further water" means that in Step 2 and/or Step 3, further addition of water to the extent that the powder cleaning composition on the textile product is wetted with water, or washing is performed without substantially adding water. This does not preclude further addition of water to the extent that the entire textile product provided is wetted with water.
For example, in step 2, the concentration of the powder detergent composition in the water contained in the textile product, that is, the concentration of the powder detergent composition in the water in which the powder detergent composition is dissolved in the textile product, is preferably 5% by mass. and more preferably 10% by mass or more, still more preferably 20% by mass or more, and 80% by mass or less, more preferably 70% by mass or less, still more preferably 60% by mass or less. Addition is acceptable.

In step 3, cleaning can be performed by applying an external force to the textile product that has been brought into contact with water and the powder cleaning composition without reducing the concentration of the powder cleaning composition in the water in which the powder cleaning composition is dissolved. preferable.
In step 3, washing by applying external force to the textile product may mean washing the textile product by applying physical force to the textile product by hand, for example, washing the textile product by applying a physical force to the textile product. The textile product that has been brought into contact with the textile product may be subjected to at least one selected from massaging, brushing, and pounding. In step 3, one or more selected from the group consisting of massaging the textile product together with the powdered detergent composition present on the textile product and brush washing the textile product together with the powdered detergent composition present on the textile product. It is preferable to perform washing by applying external force to the textile product. These actions may be performed manually.

In step 3, it is preferable that the powder detergent composition that was brought into contact with the textile product in step 2 remains undissolved. Since the powder detergent composition remains dissolved in step 3, it is possible to wash the textile product by applying external force without reducing the concentration of the powder detergent composition dissolved in the water contained in the textile product. can.
The mass of the powder cleaning composition remaining dissolved in Step 3 is preferably 10% by mass or more, more preferably 10% by mass or more of the mass of the powder cleaning composition brought into contact with the textile product in Step 2, from the viewpoint of coating and cleaning properties. is 15% by mass or more, more preferably 20% by mass or more, and from the viewpoint of comfort during coating and cleaning work, preferably 70% by mass or less, more preferably 60% by mass or less, even more preferably 50% by mass or less. .
In addition, the mass of the powder cleaning composition remaining dissolved in the step 3 may satisfy the above range either from the time when applying external force to the textile product to the time when applying the external force to the textile product. It is preferable that the mass of the powder detergent composition remaining dissolved when the external force is applied to the textile product satisfies the above range.
The mass of the powdered cleaning composition remaining dissolved in step 3 is determined from the mass of the powdered cleaning composition brought into contact with the textile product in step 2, from the viewpoint of both application cleaning performance and comfort during application and cleaning work. , preferably 10% by mass or more and 70% by mass or less, more preferably 15% by mass or more and 60% by mass or less, still more preferably 20% by mass or more and 50% by mass or less.

In step 3, the mass of the undissolved powdered cleaning composition can be determined by collecting the undissolved powdered cleaning composition on the textile product with a spatula and drying the collected powdered cleaning composition. can. To explain with a specific example, in step 3, the mass of the powder cleaning composition remaining dissolved on the textile product when the external force has been applied to the textile product is It can be determined by the mass of the solid content obtained by collecting the undissolved powder detergent composition on the textile product with a spatula and drying it in an oven at 105°C for 1 hour.
If it is difficult to measure the mass of the powdered cleaning composition remaining dissolved on the textile product, place the amount of the powdered cleaning composition that was brought into contact with the textile product in step 2 on a folded aluminum foil, and then , add the same amount of water that was brought into contact with the textile product in step 1, fold the aluminum foil in half and wash it by applying the same external force as in step 3, and collect the insoluble matter remaining on the aluminum foil. The mass of the solids dried in an oven at 105° C. for 1 hour may be regarded as the mass of the powder cleaning composition remaining dissolved on the textile product when the external force is applied to the textile product in step 3. . If it is difficult to separate the insoluble and soluble components of the powder cleaning composition, ADVANTEC No. The insoluble content of the powder cleaning composition may be determined by using the filter paper of No. 3 or the like and subtracting the mass of the filter paper.

Furthermore, after performing the washing in Steps 1 to 3, one or more steps selected from washing the textile product in a washing machine, washing the textile product by hand, and rinsing the textile product with water are performed. Good too.

The method for cleaning textile products of the present invention can target various types of fibers, such as natural fibers, synthetic fibers, and semi-synthetic fibers. The textile product cleaning method of the present invention can be applied to textile products containing these fibers. The textile product may be, for example, clothing.

The fibers may be either hydrophobic fibers or hydrophilic fibers. Examples of hydrophobic fibers include protein fibers (milk protein casein fiber, Promix, etc.), polyamide fibers (nylon, etc.), polyester fibers (polyester, etc.), polyacrylonitrile fibers (acrylic, etc.), and polyvinyl alcohol fibers. 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/ Examples include polyvinyl alcohol copolymer fibers (polycleral, etc.), polyalkylene paraoxybenzoate fibers (benzoate, etc.), polyfluoroethylene fibers (polytetrafluoroethylene, etc.). Examples of hydrophilic fibers include seed fibers (cotton, kapok, etc.), bast fibers (hemp, flax, ramie, hemp, jute, etc.), leaf vein fibers (manilla hemp, sisal, etc.), palm fibers, rush, Straw, animal hair fibers (wool, mohair, cashmere, camel hair, alpaca, vicuña, angora, etc.), silk fibers (domestic silkworm silk, wild silkworm silk, etc.), feathers, cellulose fibers (rayon, polynosic, cupro, acetate, etc.), etc. is exemplified.
In the present invention, textile products include fabrics such as woven fabrics, knitted fabrics, and non-woven fabrics using the above-mentioned hydrophobic fibers and hydrophilic fibers, as well as undershirts, T-shirts, dress shirts, blouses, slacks, and hats obtained using the same. Refers to products such as handkerchiefs, towels, knitwear, socks, underwear, and tights. Preferred textile products are woven fabrics such as woven fabrics and knitted textiles, and woven textile products, and from the same point of view, preferred textile products are textile products containing cotton fibers.

Example <Composition ingredients>
The following components were used to produce the powder cleaning compositions shown in Table 1 and the powder cleaning compositions A and B shown in Table 2.
(A) Ingredient/LAS: Sodium laurylbenzenesulfonate (Neoperex G-15, manufactured by Kao Corporation)
(B) Component/CMC: Carboxymethyl cellulose, Sunrose B2B (manufactured by Nippon Paper Industries Co., Ltd.), viscosity 5-30 mPa・s (concentration 1%, 25°C), degree of etherification 0.4-0.8
・Acrylic acid/maleic acid copolymer (sodium salt): Poise 521 (manufactured by Kao Corporation)
・Sulfonic acid copolymer: Aron 6012 (manufactured by Toagosei Co., Ltd.), solid content 40%, viscosity 100 to 350 mPa・s (25°C)
・Sodium polyacrylate (manufactured by Kao Corporation), weight average molecular weight 10,000 ・Xanthan gum (manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.): weight average molecular weight > 2,000,000
(B') Component/HEC: Hydroxyethyl cellulose (SE850K, manufactured by Daicel Millize Co., Ltd.)
・PEG: Polyethylene glycol (manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.), weight average molecular weight 20,000, 50 to 200 mPa・s (25% by mass aqueous solution)
(C) Component/bentonite: Kunipia F (manufactured by Kunimine Kogyo Co., Ltd.)
・Saponite: Sumecton SA (manufactured by Kunimine Kogyo Co., Ltd.)
・Hectorite: Synthetic hectorite (manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.), hydrophilic ・Kaolin (manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.)
(D) Component/Sodium sulfate: Anhydrous Glauber's Salt (manufactured by Shikoku Kasei Kogyo Co., Ltd.)
(E) Ingredient - Zeolite: Synthetic zeolite (manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.), A-4, powder, passing through 75 μm (200 mesh) (F) Ingredient - Sodium carbonate: Light ash (manufactured by Central Glass Co., Ltd.)
・Other ingredients ・Fluorescent dye: Chino Pearl CBS (manufactured by Ciba Specialty Chemicals)

<Powder cleaning compositions in Table 1 and powder cleaning compositions A and B in Table 2>
In order to evaluate the cleaning methods for textile products in Examples and Comparative Examples, the powder cleaning compositions in Table 1 and the powder cleaning compositions A and B for textile products in Table 2 were dried using the above components. Manufactured by neutralization method.
The powder cleaning composition shown in Table 1 was prepared by blending the components shown in Table 1 in the amounts shown in Table 1, and adjusting the balance with sodium sulfate.
Powder cleaning composition A contains 17.5% by mass of sodium laurylbenzenesulfonate, 37% by mass of sodium carbonate, 0.5% by mass of sodium polyacrylate, 5.5% by mass of zeolite, and 0.025% by mass of fluorescent dye. The remainder was adjusted with sodium sulfate.
Powder detergent composition B was prepared by blending 2.18% by mass of carboxymethyl cellulose and 3% by mass of bentonite with powder detergent composition A, and adjusting the increase in the blended components with sodium sulfate.

<Water used for each evaluation>
In the following evaluation, unless otherwise specified, water containing the following hardness components was used. 78.50 g of calcium chloride dihydrate (manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.) and 73.58 g of magnesium chloride hexahydrate (manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.) were added to 1 L of ion-exchanged water. A concentrated stock solution was prepared. This concentrated stock solution had a calcium/magnesium ratio of 6/4 (molar ratio). The obtained concentrated stock solution was diluted with dilution water having an alkalinity of 100 mg/L (calculated as CaCO ₃ ) and a pH of 7.5, and was adjusted to a German hardness of 10° dH before use. The dilution water was prepared by adding sodium bicarbonate (manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.) to ion-exchanged water to adjust the alkalinity, and by adding hydrochloric acid (manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.) to adjust the pH. Obtained by adjusting.

<Preparation of artificial mud contaminated cloth>
The model contaminated cloth used in the evaluation was created using the following procedure. This method causes particles to adhere between the fibers due to re-contamination, resulting in a contaminated cloth that is more difficult to remove than ordinary contaminated cloth with mud applied to its surface. The mud used was Kanuma Gardening Akadama soil, which was dried at 120°C ± 5°C for 4 hours, crushed, and passed through a 75 μm sieve before use. 6 g of mud was added to 1,000 mL of ion-exchanged water, stirred, and then ultrasonicated for 15 minutes. These were transferred to a tergotometer, 15 g of cotton knitted cloth (purchased from Tanigashira Shoten, 6 cm x 6 cm) was added, and the mixture was stirred at 20° C. and 100 rpm for 20 minutes. Thereafter, it was rinsed with running water for 1 minute, dehydrated for 1 minute, and air-dried overnight.

<Preparation of artificial sebum-contaminated cloth>
-Artificial soil A composition containing the following A, B, C, D, and E was used as an artificial soil. Each mass % is the proportion in the artificial stain of the final composition, and the amount of B was adjusted so that the total was 100 mass %.
A: Model sebum stain (mass% in artificial stain: 0.44% by mass of lauric acid, 3.15% by mass of myristic acid, 2.35% by mass of pentadecanoic acid, 6.31% by mass of palmitic acid, 0% by mass of heptadecanoic acid) .44% by mass, stearic acid 1.6% by mass, oleic acid 7.91% by mass, triolein 13.33% by mass, n-hexadecyl palmitate 2.22% by mass, and squalene 6.66% by mass. use)
B: Hard water obtained by weighing 105 mg of calcium chloride dihydrate and dissolving it in distilled water to make 1,000 mL C: Egg white lecithin liquid crystal 1.98% by mass (11.37 g of arginine hydrochloride, 4 histidine in 80 mL of distilled water) Egg white lecithin liquid crystal obtained by dissolving .20 g and serine 2.44 g and adjusting the pH to 5.0 with concentrated hydrochloric acid, and thoroughly mixing this solution and egg white lecithin with a mixer) D: Kanuma red clay 8.11 mass%
E: Carbon black 0.025% by mass
The artificial sebum-contaminated cloth used was a 6 cm x 6 cm cotton/polyester broad blend dyed cloth (cotton/polyester ratio = 35/65, purchased from Tanigashira Shoten), and 100 mg of artificial dirt having the above composition was added to each cloth. It was gravure coated to make it look like this.

<Evaluation of cleaning power>
(1) Examples 1-1 to 1-12, 2-1 and Comparative Examples 1-1 to 1-2 (coating and cleaning)
For each of the powder cleaning compositions shown in Table 1, the artificial mud-contaminated cloth was cleaned by the following coating cleaning process, and the cleaning power was evaluated. In addition, regarding the powder detergent composition of Example 2-1 in Table 2, the above-mentioned artificial mud-stained fabric and artificial sebum-stained fabric were each washed by the following coating cleaning method, and the detergency was evaluated.
For each of the artificial mud-contaminated cloth and the artificial sebum-contaminated cloth, after adding 2.5 mL of hard water with a calcium carbonate equivalent of 179 mg/L (this hard water corresponds to 10° dH on the German hardness scale) per contaminated cloth. , 0.3 g of each of the powdered cleaning compositions listed in Table 1 or Table 2 was directly applied, and the applied state was rubbed by hand five times from two directions. After hand-rubbing, the contaminated cloth was observed visually and with a digital microscope (VHX7000, manufactured by Keyence Corporation) with a magnification of 30x, and powder cleaning composition was confirmed on the contaminated cloth for all powder cleaning compositions. It was confirmed that the contaminated cloth was hand kneaded with the powdered cleaning composition.
Next, in 600 mL of the above-mentioned hard water in which 0.6 g of each of the above-mentioned powder detergent compositions had been dissolved, 4 pieces of contaminated cloth hand-rubbed with each of the above-mentioned powder detergent compositions were added, and the cleaning time was 10 minutes using a tergotometer. Washing was carried out at a rotational speed of 100 rpm and a water temperature of 30°C. The water used to prepare the cleaning solution was water whose temperature was 25° C. and whose German hardness was adjusted to 10° dH. After washing, a rinse was performed for 1 minute with the same water used to prepare the washing solution.
The detergency was evaluated based on the cleaning rate (%) calculated based on the following formula (1). Specifically, the reflectance of the original cloth before contamination and the contaminated cloth before and after cleaning was measured using a colorimeter (Nippon Denshoku Co., Ltd. Z-300A), and the cleaning was performed based on the following formula (1). The rate (%) was calculated. The cleaning rate results show the average of the calculation results for four contaminated cloths. The higher the cleaning rate, the better the cleaning performance.
Cleaning rate (%) = 100 × [(Reflectance of contaminated cloth after cleaning - Reflectance of contaminated cloth before cleaning) / (Reflectance of original cloth - Reflectance of contaminated cloth before cleaning)] (1)

(2) Comparative Examples 2-1 and 2-2 (washing using a washing machine)
Add 4 each of artificial mud-contaminated cloth and artificial sebum-contaminated cloth to 1 L of cleaning liquid in which the powdered cleaning composition listed in Table 2 has been dissolved, and use a tergotometer (MS-8212 manufactured by Ueshima, inner diameter 12 cm). , height 17.5 cm) for 10 minutes at 100 r/min. The concentration of the powder cleaning composition in the cleaning liquid was 0.1% by mass. The water used to prepare the cleaning solution was water whose temperature was 25° C. and whose German hardness was adjusted to 10° dH. After washing, a rinse was performed for 1 minute with the same water used to prepare the washing solution. The cleaning rate was calculated based on formula (1) in the same manner as in (1) above for any contaminated cloth. The cleaning rate results show the average of the calculation results for four contaminated cloths.

(3) Comparative Examples 2-3, 2-4 (model evaluation assuming hand washing)
Four pieces of each of artificial mud-contaminated cloth and artificial sebum-contaminated cloth were added to 1 L of cleaning liquid in which the powdered cleaning composition listed in Table 2 was dissolved, and after soaking for 30 minutes, a Tergotometer (manufactured by Ueshima) MS-8212 (inner diameter 12 cm, height 17.5 cm) was used for washing at 180 r/min for 3 minutes. The concentration of the powder cleaning composition in the cleaning solution was 0.4% by mass. The water used to prepare the cleaning solution was water whose temperature was 25° C. and whose German hardness was adjusted to 10° dH. After washing, a rinse was performed for 1 minute with the same water used to prepare the washing solution. The cleaning rate was calculated based on formula (1) in the same manner as in (1) above for any contaminated cloth. The cleaning rate results show the average of the calculation results for four contaminated cloths.

<pH measurement method>
A composite electrode for pH measurement (glass rubbed sleeve type, manufactured by HORIBA) was connected to a pH meter (PH/ion meter F-23 manufactured by HORIBA), and the power was turned on. A saturated potassium chloride aqueous solution (3.33 mol/L) was used as the pH electrode internal solution. Next, fill a 100 mL beaker with each of pH 4.01 standard solution (phthalate standard solution), pH 6.86 (neutral phosphate standard solution), and pH 9.18 standard solution (borate standard solution), It was immersed in a constant temperature bath at ℃ for 30 minutes. The pH measuring electrode was immersed in a standard solution adjusted to a constant temperature for 3 minutes, and a calibration operation was performed in the order of pH 6.86 → pH 9.18 → pH 4.01. Adjust the sample to be measured (a solution of 15 g of powdered cleaning composition dissolved in 40 g of ion-exchanged water) to 25°C, immerse the electrode of the pH meter in the sample, and measure the pH after 1 minute. did. When the pH of the powder cleaning compositions listed in Tables 1 and 2 was measured using this method, the pH range of each powder cleaning composition was in the range of 10 to 13.

<Measurement of insoluble matter after hand washing>
0.3 g of the powder cleaning composition shown in Table 1 or Table 2 was placed on a folded aluminum foil, and 2.5 mL of 10° dH hard water was added. In the same manner as in the application washing described in <Evaluation of detergency> (1) above, the aluminum foil was folded in half and then rubbed by hand five times in each direction. Thereafter, the insoluble matter remaining on the aluminum foil was collected using a spatula, and the mass of the solid material was measured after drying in an oven at 105° C. for 1 hour. Then, the ratio (mass%) of the insoluble matter to the powder cleaning composition placed on the aluminum foil is calculated as (mass of the solid after drying)/(total mass of the powder cleaning composition placed on the aluminum foil). Calculated by.
The proportion of this insoluble matter is calculated as the proportion of the powdered detergent composition that remained dissolved after hand kneading in (1) of <Evaluation of detergency> to the total amount of the powdered detergent composition that was brought into contact with the contaminated cloth. Tables 1 and 2 show the powder cleaning composition remaining dissolved after massaging/powder cleaning composition contacted with contaminated cloth (% by mass).

<Evaluation of slipperiness of clothing during hand washing>
After adding 2.5 mL of hard water with a calcium carbonate equivalent of 179 mg/L (this hard water corresponds to 10° dH on the German hardness scale) to each artificial mud-contaminated cloth, add the powder cleaning agent listed in Tables 1 and 2. 0.3 g of the composition (0.01 g in the case of Comparative Examples 2-3 and 2-4) was directly applied to each, and the applied state was rubbed by hand five times from two directions. The slipperiness of clothing during hand washing was sensory evaluated based on the feel of the clothing during washing. Five panelists judged whether clothing felt slippery based on the base powder detergent composition. The evaluation criteria are shown below. It can be said that the more panelists judge that the item is slippery, the higher the comfort level of hand washing.
The base powder cleaning composition contains (A) 17.5% by mass of sodium laurylbenzenesulfonate, 37% by mass of sodium carbonate, and 0.025% by mass of fluorescent dye, and the remainder is (D) sodium sulfate. This is a prepared composition.
-Evaluation Criteria: ○: 3 or more out of 5 panelists judged that the clothing was slippery.
△: More than 1 and less than 2 out of 5 panelists judged that the clothing was slippery.

*1: The concentration (mass%) of the powder cleaning composition in Examples and Comparative Examples in Table 1 and Example 2-1 in Table 2 is based on the mass of water brought into contact with the contaminated cloth and the amount of water applied to the contaminated cloth in Step 2. This is the concentration calculated based on the mass of the powdered detergent composition that was contacted, excluding the powdered detergent composition that remained dissolved after hand kneading.

Claims

A textile product is brought into contact with water and a powder cleaning composition containing the following component (A) in an amount of 5% by mass or more and 30% by mass or less and the following component (B) in an amount of 0.5% by mass or more. A method for cleaning textile products, which comprises washing the textile products by applying an external force to the textile products together with the undissolved powder detergent composition.
(A) Component: Anionic surfactant (B) Component: Anionic water-soluble polymer
A textile product is brought into contact with water and the powder detergent composition in excess of the saturated solubility in the water, and an external force is applied to the textile product together with the powder detergent composition remaining dissolved on the textile product. 2. The method for cleaning textile products according to claim 1, wherein the cleaning is performed by washing the textile products.
Step 1 of contacting the textile product with water; Step 2 of contacting the textile product with the water with the powder detergent composition in excess of the saturated solubility in the water; and the powder remaining dissolved on the textile product. 3. The method for cleaning textile products according to claim 1, comprising the step of cleaning by applying an external force to the textile products together with a cleaning agent composition.
4. The method for cleaning textile products according to claim 3, wherein the amount of the powder detergent composition that is brought into contact with the textile product in step 2 is 0.100 g or more and 1.000 g or less per 1 g of water that is contacted in step 1.
The method for cleaning textile products according to claim 3 or 4, wherein in step 3, the powder cleaning composition that was brought into contact with the textile product in step 2 remains undissolved.
Any one of claims 1 to 5, wherein after the textile product is brought into contact with water and the powder cleaning composition, the textile product is washed by applying an external force to the textile product without substantially adding water. Methods for cleaning textile products as described in Section.
Any one of claims 1 to 6, wherein the mass of the powdered cleaning composition remaining dissolved on the textile product is 10% by mass or more and 70% by mass or less of the mass of the powdered cleaning composition brought into contact with the textile product. Methods for cleaning textile products as described in Section.
The method for cleaning textile products according to any one of claims 1 to 7, wherein the powder cleaning composition concentration of the water in which the powder cleaning composition is dissolved exceeds 5% by mass.
The method for cleaning textile products according to any one of claims 1 to 8, wherein 0.1 g or more of the powder cleaning composition is brought into contact with the textile product per 1 g of water that is brought into contact with the textile product.
Cleaning of textile products according to any one of claims 1 to 9, wherein the pH of a solution obtained by dissolving 0.3 g of the powder cleaning composition in 0.8 g of water at 25° C. is 10 or more and 13 or less. Method.
Washing the textile product by applying an external force means massaging the textile product together with the powder cleaning agent composition that remains dissolved on the textile product, and washing the textile product together with the powder cleaning composition that remains dissolved on the textile product. The method for cleaning textile products according to any one of claims 1 to 10, comprising one or more methods selected from the group consisting of brush washing the textile products together with the agent composition.
After washing the textile product by applying an external force, further performing one or more steps selected from washing the textile product in a washing machine, washing the textile product by hand, and rinsing the textile product with water. The method for cleaning textile products according to any one of claims 1 to 11.
Any one of claims 1 to 12, wherein the component (B) is one or more selected from carboxymethylcellulose, acrylic acid/maleic acid copolymer, acrylic acid/acrylamidomethylpropanesulfonic acid copolymer, and salts thereof. The method for cleaning textile products according to item 1.
The method for cleaning textile products according to any one of claims 1 to 13, wherein the powder cleaning composition contains (C) a clay mineral [hereinafter referred to as component (C)].
The method for cleaning textile products according to claim 14, wherein the component (C) is a smectite clay mineral.
The powder cleaning composition contains component (B) at 0.8% by mass or more and 4% by mass or less, component (C) at least 3% by mass, and the content of component (B) and the content of component (C). The method for cleaning textile products according to claim 14 or 15, wherein the mass ratio (B)/(C) is 0.08 or more and 1.33 or less.