Detergent composition and cleaning method for textile products

Abstract

To provide a detergent composition for fiber products with improved washability with regard to blood dirt while suppressing damage to fiber products such as clothing.SOLUTION: A detergent composition for fiber products according to an embodiment includes an amphoteric surfactant (A), a fatty acid alkanolamide (B), at least one carbonate (C) of sodium carbonate and potassium carbonate, and at least one bicarbonate (D) of sodium bicarbonate and potassium bicarbonate.SELECTED DRAWING: None

Description

Technical Field

[0001] The present invention relates to a detergent composition and a washing method for textile products.

Background Art

[0002] As a detergent composition for washing textile products such as clothes, for example, Patent Document 1 discloses that by blending a salt of an organic phosphate ester anion and an organic amine derivative cation, and a nonionic surfactant, the detergency of mud stains can be improved. However, with the detergent described in Patent Document 1, it is difficult to remove blood stains adhering to textile products.

[0003] Generally, if a detergent with an alkaline agent added to increase the pH is used, blood stains can be removed. However, a detergent with a high pH will damage textile products. Therefore, Patent Document 2 discloses a detergent composition for textile products containing a phosphate ester type anionic surfactant and a carbonate of an alkali metal, with a pH of 9.5 to 11.5.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] An embodiment of the present invention aims to provide a detergent composition and a washing method for textile products that can improve the detergency against blood stains while suppressing damage to textile products.

Means for Solving the Problems

[0006] The present invention includes embodiments shown below. [1] A detergent composition for textile products comprising an amphoteric surfactant (A), a fatty acid alkanolamide (B), a carbonate of at least one of sodium carbonate and potassium carbonate (C), and a bicarbonate of at least one of sodium bicarbonate and potassium bicarbonate (D). [2] The detergent composition for textile products according to [1], wherein the content of the carbonate (C) is 5 to 80 parts by mass and the content of the bicarbonate (D) is 3 to 80 parts by mass per 100 parts by mass of the amphoteric surfactant (A). [3] The detergent composition for textile products according to [1] or [2], wherein the content of the fatty acid alkanolamide (B) is 5 to 85 parts by mass per 100 parts by mass of the amphoteric surfactant (A). [4] A detergent composition for textile products according to any one of [1] to [3], further comprising a quaternary ammonium salt (E).

[0007] [5] A cleaning method for cleaning textile products using a cleaning agent composition comprising an amphoteric surfactant (A), a fatty acid alkanolamide (B), a carbonate of at least one of sodium carbonate and potassium carbonate (C), and a bicarbonate of at least one of sodium bicarbonate and potassium bicarbonate (D). [6] The washing method according to [5], wherein the content of the carbonate (C) is 5 to 80 parts by mass and the content of the bicarbonate (D) is 3 to 80 parts by mass per 100 parts by mass of the amphoteric surfactant (A). [7] The washing method according to [5] or [6], wherein the content of the fatty acid alkanolamide (B) is 5 to 85 parts by mass per 100 parts by mass of the amphoteric surfactant (A). [8] The cleaning method according to any one of [5] to [7], wherein the cleaning agent composition further comprises a quaternary ammonium salt (E). [Effects of the Invention]

[0008] According to embodiments of the present invention, it is possible to improve the cleaning performance against blood and sebum stains while minimizing damage to textile products such as clothing. [Modes for carrying out the invention]

[0009] Embodiments of the present invention will be described in detail below.

[0010] [Amphoteric surfactant (A)] The detergent composition for textile products according to this embodiment (hereinafter also referred to as the "detergent composition") contains an amphoteric surfactant as component (A). Examples of amphoteric surfactants include betaine-type amphoteric surfactants, sulfobetaine-type amphoteric surfactants, and amine oxide-type amphoteric surfactants. Any one or more of these can be used in combination. Preferably, a betaine-type amphoteric surfactant is used as component (A).

[0011] Betaine-type amphoteric surfactants have a quaternary ammonium group as a cationic group and a -COO group as an anionic group. - These are surfactants that possess the properties of [the property]. Specific examples of betaine-type amphoteric surfactants include alkylbetaine-type amphoteric surfactants such as lauryldimethylaminoacetic acid betaine and coconut oil dimethylaminoacetic acid betaine, amidebetaine-type amphoteric surfactants such as lauric acid amidopropyl betaine, octanoic acid amidopropyl betaine, coconut oil fatty acid amidopropyl betaine, and palm kernel oil fatty acid amidopropyl betaine, and imidazolinium betaine-type amphoteric surfactants such as 2-alkyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine. Any one or more of these can be used in combination. Among these, at least one selected from the group consisting of alkyldimethylaminoacetic acid betaine, fatty acid amidopropyl betaine, and 2-alkyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine is preferably used.

[0012] The hydrocarbon group serving as a hydrophobic group in the alkylbetaine-type amphoteric surfactant described above may be saturated or unsaturated, or a mixture of both, and is preferably a saturated alkyl group. The number of carbon atoms in the hydrocarbon group is not particularly limited and may be 8 to 20, 8 to 18, or 10 to 18. The short-chain hydrocarbon group bonded to the nitrogen atom together with the hydrophobic group is preferably an alkyl group having 1 to 4 carbon atoms, and more preferably a methyl group.

[0013] The hydrocarbon group acting as a hydrophobic group in the above-mentioned amide-betaine type amphoteric surfactant may be saturated or unsaturated, or a mixture of both. The number of carbon atoms in the hydrocarbon group is not particularly limited and may be 8 to 20, 8 to 18, or 10 to 18. The number of carbon atoms in the alkylene group interposed between the NH of the amide bond and the nitrogen atom of the quaternary ammonium is not particularly limited and may be 1 to 6, 2 to 4, and preferably a trimethylene group with 3 carbon atoms. The short-chain hydrocarbon group bonded to the nitrogen atom of the quaternary ammonium is preferably an alkyl group with 1 to 4 carbon atoms, and more preferably a methyl group.

[0014] The hydrocarbon group acting as a hydrophobic group in the above-mentioned imidazolinium betaine-type amphoteric surfactant may be saturated or unsaturated, or both may be present. The number of carbon atoms in the hydrocarbon group is not particularly limited and may be 8 to 20, 8 to 18, or 10 to 18.

[0015] The above sulfobetaine-type amphoteric surfactant has a quaternary ammonium group as a cationic group and -SO3 as an anionic group. - These are surfactants that possess [a certain property]. Examples of sulfobetaine-type amphoteric surfactants include alkyl hydroxysulfobetaine and alkylamido hydroxysulfobetaine.

[0016] Examples of the above-mentioned amine oxide-type amphoteric surfactants include alkyldimethylamine oxides such as lauryldimethylamine oxide.

[0017] [Fatty acid alkanolamide (B)] The detergent composition according to this embodiment contains fatty acid alkanolamide as component (B). Fatty acid alkanolamide is an amide compound of a fatty acid and an alkanolamine and is a kind of nonionic surfactant.

[0018] Examples of the fatty acid alkanolamide include fatty acid monoalkanolamide, fatty acid dialkanolamide, and those to which polyoxyalkylene (for example, polyoxyethylene) is added. Among these, fatty acid dialkanolamide is preferred.

[0019] The fatty acid constituting the fatty acid alkanolamide is not particularly limited and may be a saturated fatty acid, an unsaturated fatty acid, or a mixture of both. The number of carbon atoms of the fatty acid is not particularly limited and may be 8 to 20, 8 to 18, or 10 to 18. Further, the number of carbon atoms of the hydroxyalkyl group (that is, the group derived from alkanolamine) bonded to the nitrogen atom of the amide bond is preferably 1 to 4, and more preferably a hydroxyethyl group having 2 carbon atoms.

[0020] Specific examples of the fatty acid alkanolamide include fatty acid monoethanolamides such as lauric acid monoethanolamide, stearic acid monoethanolamide, coconut oil fatty acid monoethanolamide, palm kernel oil fatty acid monoethanolamide, lauric acid isopropanolamide, coconut oil fatty acid isopropanolamide, and fatty acid dialkanolamides such as lauric acid diethanolamide, myristic acid diethanolamide, stearic acid diethanolamide, coconut oil fatty acid diethanolamide, palm kernel oil fatty acid diethanolamide. Any one or a combination of two or more of these can be used. Among these, fatty acid diethanolamide is preferably used.

[0021] [Sodium carbonate and / or potassium carbonate (C)] The detergent composition according to this embodiment contains at least one carbonate of sodium carbonate and potassium carbonate (hereinafter referred to as "carbonate (C)") as component (C). That is, the detergent composition may contain only sodium carbonate, only potassium carbonate, or both sodium carbonate and potassium carbonate as component (C).

[0022] The inclusion of such carbonate (C) improves the cleansing ability against blood stains, and when used in combination with components (A) and (B) above, it improves the cleansing ability against sebum stains.

[0023] [Sodium bicarbonate and / or potassium bicarbonate (D)] The detergent composition according to this embodiment contains at least one of sodium bicarbonate and potassium bicarbonate (hereinafter referred to as "bicarbonate (D)") as component (D). That is, the detergent composition may contain only sodium bicarbonate, only potassium bicarbonate, or both sodium bicarbonate and potassium bicarbonate as component (D).

[0024] By including such bicarbonate (D), it is possible to maintain the cleaning power against blood stains caused by the carbonate (C) while minimizing damage to textile products.

[0025] [Quaternary ammonium salt (E)] The detergent composition according to this embodiment may further contain a quaternary ammonium salt as component (E) in addition to the above components (A) to (D). By including a quaternary ammonium salt, disinfectant (antibacterial) properties can be imparted to the detergent composition.

[0026] Examples of quaternary ammonium salts are not particularly limited and include dialkyldimethylammonium salts such as didecyldimethylammonium chloride, coconut alkyldimethylammonium chloride, dioleyldimethylammonium chloride, distearyldimethylammonium chloride, and dihydrogenated beef tallow alkyldimethylammonium chloride; alkyldimethylbenzylammonium salts such as lauryldimethylbenzylammonium chloride, coconut alkyldimethylbenzylammonium chloride, tetradecyldimethylbenzylammonium chloride, and alkyl(C8-18)dimethylbenzylammonium chloride (benzalkonium chloride); and alkyltrimethylammonium salts such as decyltrimethylammonium chloride, lauryltrimethylammonium chloride, cetyltrimethylammonium chloride, stearyltrimethylammonium chloride, coconut alkyltrimethylammonium chloride, beef tallow alkyltrimethylammonium chloride, and oleyltrimethylammonium chloride. Any one or more of these can be used in combination.

[0027] [Detergent composition for textile products] The detergent composition according to this embodiment contains the above-mentioned amphoteric surfactant (A), fatty acid alkanolamide (B), carbonate (C), and bicarbonate (D). This makes it possible to improve the cleaning performance against blood and sebum stains while suppressing damage to textile products such as clothing. In particular, the inclusion of carbonate (C) improves the cleaning performance against blood stains. Furthermore, the inclusion of amphoteric surfactant (A) and fatty acid alkanolamide (B) together with carbonate (C) improves the cleaning performance against sebum stains. Moreover, by using bicarbonate (D) in combination with carbonate (C), it is possible to suppress the rise in pH and reduce damage to textile products while maintaining cleaning performance.

[0028] The proportions of components (A) to (D) described above are not particularly limited. In one embodiment, the content of component (B) per 100 parts by mass of component (A) is preferably 5 to 85 parts by mass, more preferably 10 to 70 parts by mass, and even more preferably 15 to 50 parts by mass.

[0029] In one embodiment, the content of component (C) relative to 100 parts by mass of component (A) is preferably 5 to 80 parts by mass, more preferably 10 to 70 parts by mass, and even more preferably 20 to 50 parts by mass.

[0030] In one embodiment, the content of component (D) relative to 100 parts by mass of component (A) is preferably 3 to 80 parts by mass, more preferably 10 to 60 parts by mass, and even more preferably 15 to 40 parts by mass.

[0031] The content of component (A) in the detergent composition is not particularly limited. For example, it may be 10 to 80% by mass, 20 to 70% by mass, or 30 to 60% by mass, based on 100% by mass of the total solids (non-volatile content) of the detergent composition.

[0032] In one embodiment, the detergent composition preferably further contains a quaternary ammonium salt (E). This imparts disinfectant (antibacterial) properties to the detergent composition. In particular, according to this embodiment, since components (A) to (D) are not anionic surfactants, it is possible to achieve both the original effects of suppressing damage to textile products and the cleaning effect while also imparting a disinfectant effect by the quaternary ammonium salt (E).

[0033] The content of component (E) is not particularly limited. In one embodiment, the content of component (E) relative to 100 parts by mass of component (A) may be 3 to 50 parts by mass, 5 to 30 parts by mass, or 10 to 25 parts by mass.

[0034] The detergent composition is preferably a liquid detergent composition containing water along with components (A) to (D) and an optional component (E). In such a liquid detergent composition, the inclusion of the amphoteric surfactant (A) can suppress turbidity and separation of the detergent composition and improve its stability.

[0035] The solid content concentration (non-volatile content concentration) of the liquid detergent composition is not particularly limited. For example, when the product is manufactured as a concentrate to be diluted with water for use during washing, the solid content concentration of the liquid detergent composition may be 10 to 50% by mass or 15 to 40% by mass. On the other hand, when the liquid detergent composition is applied directly to textile products, the solid content concentration of the liquid detergent composition may be lower, for example, 0.01 to 30% by mass or 0.1 to 10% by mass. Therefore, the solid content concentration in both cases combined may be 0.01 to 50% by mass or 0.1 to 40% by mass.

[0036] Furthermore, when commercializing a liquid detergent composition as a stock solution, as described above, incorporating fatty acid alkanolamide (B) can improve usability by providing a thickening effect.

[0037] The pH of the detergent composition is not particularly limited, but it is preferably 9.5 to 11.5, more preferably 9.8 to 11.2, and even more preferably 10.0 to 11.0 in a 1% by mass aqueous solution. Here, the pH of a 1% by mass aqueous solution is the pH measured at 25°C when the detergent composition is dissolved in water or diluted with water to prepare an aqueous solution with a solid content of 1% by mass. Here, the pH is measured by the glass electrode method in accordance with JIS Z8802.

[0038] In addition to components (A) to (D), component (E) as an optional component, and water, the detergent composition according to this embodiment may contain other components, provided that they do not inhibit the effects of the components. Examples of other components include other surfactants, chelating agents, pH adjusters (such as sodium hydroxide, potassium hydroxide, sulfuric acid, and hydrochloric acid), bleaches, fabric softeners, fluorescent agents, enzymes, preservatives, fragrances, colorants, defoamers, and hydrophilic solvents (such as monohydric and dihydric alcohols). However, the inclusion of anionic surfactants impairs the disinfecting properties of the quaternary ammonium salt (E). Therefore, when the quaternary ammonium salt (E) is included, it is preferable that the detergent composition does not contain anionic surfactants.

[0039] Other surfactants mentioned above include, for example, nonionic surfactants other than component (B) and cationic surfactants other than component (E). Examples of nonionic surfactants include polyoxyalkylene alkyl ethers, polyoxyalkylene alkylphenyl ethers, polyoxyalkylene fatty acid esters, polyoxyalkylene sorbitan fatty acid esters, and sucrose fatty acid esters. Here, polyoxyalkylene is preferably polyoxyethylene.

[0040] Examples of the chelating agents mentioned above include tetrasodium ethylenediaminetetraacetate, nitrilotriacetate, diethylenetriaminepentaacetate, hydroxyethylethylenediaminetriacetate, triethylenetetraminehexaacetate, 1,3-propanediaminetetraacetate, L-glutamic acid diacetate, ethylenediamine disuccinate, citrate, 1-hydroxyethylidene-1,1-diphosphonate, nitrilotris(methylenephosphonic acid) salt, and ethylenediaminetetra(methylenephosphonic acid) salt.

[0041] [How to wash textile products] The detergent composition according to the embodiment described above can be used as a detergent for cleaning textile products such as clothing. Therefore, the method for cleaning textile products according to the embodiment involves cleaning the textile products using the above-described detergent composition.

[0042] The specific cleaning method is not particularly limited. For example, the cleaning agent composition may be added to water such as tap water and agitated together with the textile product using a washing machine such as a drum-type washing machine or a pulsator-type washing machine. Alternatively, the textile product may be soaked in a cleaning solution obtained by dissolving or diluting the cleaning agent composition in water, or washed by hand. Furthermore, the cleaning agent composition may be applied directly to the soiled areas of the textile product, and then washed with water.

[0043] The amount of the above-mentioned detergent composition used is not particularly limited, and the solid content concentration in the cleaning solution obtained by mixing the detergent composition with water may be 0.01 to 2% by mass, or 0.1 to 1% by mass. The bath ratio (volume of cleaning solution (L) used to wash 1 kg of the object to be cleaned) is also not particularly limited, and may be, for example, 1:3 to 1:40, or 1:5 to 1:30.

[0044] Examples of textile products include woven fabrics, knitted fabrics, and nonwoven fabrics made from organic fibers, as well as clothing (garments, underwear, etc.) and other textile products (e.g., towels, sheets) obtained using these materials. Examples of organic fibers include synthetic fibers such as polyester fibers, polyamide fibers, and acrylic fibers, natural fibers such as cotton, linen, and silk, and cellulose fibers such as rayon and acetate.

[0045] Furthermore, unless otherwise specified, the various numerical ranges mentioned above, including the blending amounts, carbon number, concentration, and pH, each include their respective upper and lower limits. The upper and lower limits of these numerical ranges can be combined in any way, and all such combinations are described herein as preferred numerical ranges. [Examples]

[0046] The present invention will be described in more detail below with reference to examples, but it is not limited to these.

[0047] A detergent composition was prepared by mixing the components (A) to (E) listed below and water according to the formulation (parts by mass) shown in Table 1. Note that when using an aqueous solution of each component, the parts by mass in the table represent the parts by mass of the active ingredient (solid content).

[0048] (A) Ingredients: A-1: Lauryldimethylaminoacetate betaine (Amogen SH, manufactured by Daiichi Kogyo Seiyaku Co., Ltd.) A-2: Coconut oil fatty acid amidopropyl betaine (Amorgen CB-H, manufactured by Daiichi Kogyo Seiyaku Co., Ltd.) A-3: 2-Alkyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine (manufactured by Lion Specialty Chemicals Co., Ltd. as "Energicol C-40H")

[0049] (B) Ingredients: • B-1: Coconut oil fatty acid diethanolamide (Dianol CDE, manufactured by Daiichi Kogyo Seiyaku Co., Ltd.) • B-2: Lauric acid diethanolamide (Aminone L-02, manufactured by Kao Corporation)

[0050] (C) Ingredients: ·C-1: Sodium carbonate C-2: Potassium carbonate

[0051] (D) Ingredients: · D-1: Sodium bicarbonate ·D-2: Potassium bicarbonate

[0052] (E) Ingredients: • E-1: Lauryldimethylbenzylammonium chloride (Kachiogen BC-50, manufactured by Daiichi Kogyo Seiyaku Co., Ltd.) • E-2: Didecyldimethylammonium chloride ("Katiogen DDM-PG" manufactured by Daiichi Kogyo Seiyaku Co., Ltd.)

[0053] For each detergent composition obtained, stability, blood stain removal ability, sebum stain removal ability, fabric damage after washing, and antibacterial properties were evaluated using the evaluation method described below. In addition, the pH of a 1% by mass aqueous solution (25°C) of each detergent composition was measured according to the method described above.

[0054] ·Stability: The detergent composition was stored at 50°C for 24 hours, and it was confirmed that there was no turbidity or separation. If it was clear, it was labeled "A," and if turbidity or separation occurred, it was labeled "B."

[0055] • Bloodstain cleaning ability: A standard artificial soiled cloth (Swissatest "EMPA111") cut into 6cm x 6cm pieces was used as the object to be cleaned for the cleaning test. Each cleaning agent composition was diluted to 2% by mass with water (50-fold dilution), and the soiled cloth was immersed in 1 L of the cleaning solution and stirred for 10 minutes. After that, the soiled cloth was removed, rinsed with 1 L of tap water for 10 seconds, rinsed again with 1 L of tap water for 10 seconds, and dried at room temperature. After drying, the Y value by reflection (specular reflection treatment SCE) was measured using a spectrophotometer (Nippon Denshoku Industries Ltd. "SD6000") and evaluated according to the following criteria. Evaluation Criteria A: Y value is 70 or higher B: Y value is 65 or higher, less than 70. C:Y value is less than 65

[0056] • Sebum-cleansing properties: The standard artificial soiled cloth was changed to WFK's "WFK10D," and the Y value was measured in the same manner as for blood stain cleanability, and evaluated according to the following criteria. Evaluation Criteria A: Y value is 55 or higher B: Y value is 50 or greater, less than 55. C:Y value is less than 50

[0057] • Fabric damage after washing: A 1 L washing solution, prepared by diluting the detergent composition 50 times with water, was placed in a turgotometer. After adjusting the temperature to 30°C, a Kanakin No. 3 cloth (10 x 10 cm) was added as a test cloth, and a washing test was conducted at a speed of 100 rpm for 20 minutes. After rinsing with tap water for 1 minute, the cloth was lightly squeezed and hung to dry at room temperature for 2 hours. This was repeated 5 times, and the resulting test cloths were compared to a control cloth, with 10 panelists checking for surface roughness and evaluating them according to the following criteria. The control cloth was obtained by performing the same washing test using water instead of the above washing solution. Evaluation Criteria A: 8 or more people judged it as no disruption. B: 5-7 people judged that there were no disturbances. C: 4 people or less judged to be no disruptive behavior

[0058] ·Eliminating properties: The cleaning agent composition was diluted 50 times with sterile water, and 4.9 mL of the resulting diluted solution was mixed with a pre-prepared bacterial solution (bacterial count: 5.0-45.0 × 10⁶). 5~6 0.1 mL of CFU / mL was added and stirred, then allowed to stand for 20 minutes. Further dilution was performed 10-fold with a neutralizing agent, and after standing for 10 minutes, the number of viable bacteria was checked by smear method. The sterilization rate relative to the control was determined and evaluated according to the following criteria. For the control, 4.9 mL of sterile water was used instead of the 4.9 mL of the above dilution, and the number of viable bacteria was checked in the same manner as before. The sterilization rate is the percentage reduction in the number of viable bacteria relative to the control. Evaluation tests were performed for Staphylococcus aureus and Escherichia coli. The results for Staphylococcus aureus were rated as "sterilization effectiveness 1," and the results for Escherichia coli were rated as "sterilization effectiveness 2," and the results are shown in Table 1. Evaluation Criteria A: Sterilization rate of 99% or higher B: Sterilization rate of 90% or more but less than 99% C: Sterilization rate less than 90%

[0059] [Table 1]

[0060] The results are shown in Table 1. In Comparative Example 1, because it did not contain an amphoteric surfactant (A), it was ineffective at cleaning sebum stains, and separation was observed in the stability evaluation of the detergent composition, indicating poor stability. In Comparative Example 2, because it did not contain a fatty acid alkanolamide (B), it was ineffective at cleaning sebum stains. In Comparative Example 3, because it did not contain a carbonate (C), it was ineffective at cleaning blood stains and sebum stains. In Comparative Example 4, because it did not contain a bicarbonate (D), there was significant fabric damage after washing.

[0061] In contrast, Examples 1-18, which incorporated all of components (A) to (D), demonstrated excellent cleaning performance for blood and sebum stains while suppressing fabric damage after washing, and also exhibited excellent stability of the detergent composition. Furthermore, Examples 1-14 and 16-18, which further incorporated component (E), achieved both suppression of fabric damage and excellent cleaning performance for blood and sebum stains, while also imparting antibacterial properties to the detergent composition.

[0062] Although several embodiments of the present invention have been described above, these embodiments are presented as examples and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their omissions, substitutions, and modifications are included in the scope and spirit of the invention, as well as in the claims and their equivalents.

Claims

1. amphoteric surfactant (A), Fatty acid alkanolamide (B) and, A carbonate (C) of at least one of sodium carbonate and potassium carbonate, A bicarbonate (D) of at least one of sodium bicarbonate and potassium bicarbonate, Includes, The content of the fatty acid alkanolamide (B) is 5 to 85 parts by mass per 100 parts by mass of the amphoteric surfactant (A), the content of the carbonate (C) is 5 to 80 parts by mass, and the content of the bicarbonate (D) is 3 to 80 parts by mass. A detergent composition for textile products, wherein the pH of a 1% by mass aqueous solution measured at 25°C is 9.5 to 11.

5.

2. Furthermore, the detergent composition for textile products according to claim 1, further comprising a quaternary ammonium salt (E).

3. A cleaning method for cleaning textile products using a cleaning agent composition comprising an amphoteric surfactant (A), a fatty acid alkanolamide (B), a carbonate of at least one of sodium carbonate and potassium carbonate (C), and a bicarbonate of at least one of sodium bicarbonate and potassium bicarbonate (D), The aforementioned detergent composition has a content of 5 to 85 parts by mass of the fatty acid alkanolamide (B) per 100 parts by mass of the amphoteric surfactant (A), a content of 5 to 80 parts by mass of the carbonate (C), a content of 3 to 80 parts by mass of the bicarbonate (D), and a pH of 9.5 to 11.5 measured at 25°C in a 1% by mass aqueous solution. Cleaning method.

4. The cleaning method according to claim 3, wherein the cleaning agent composition further comprises a quaternary ammonium salt (E).

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