Powder-liquid type laundry beads and preparation method thereof

Abstract

The present invention relates to a powder-liquid laundry condenser bead, comprising a powder cavity and a liquid cavity. During use, when the powder-liquid laundry condenser bead prepared by the present invention completely dissolves a PVA film, percarbonate can rapidly release active oxygen upon contact with water. The active oxygen can break the chemical bonds between organic pigments and fibers, causing stains to oxidatively decompose into small molecules soluble in water, thereby achieving an effect of easy cleaning. The present invention also unexpectedly discovered that the synergistic effect of a chelating agent, percarbonate, and alkyl pyrrolidone can significantly improve the stain removal ability. The chelating agent can effectively stabilize the percarbonate, greatly reducing the active oxygen release rate of sodium percarbonate in the powder-liquid laundry condenser bead, thereby retaining the product's long-term active oxygen cleaning ability.

Description

Technical Field

[0001] The invention relates to the technical field of fabric washing and care, in particular to a powder-liquid type laundry condensate bead and a preparation method thereof. Background Art

[0002] With the development of society and the improvement of people's living standards, detergent formulations have continued to evolve and diversify. From soap to laundry detergent powder, and then to the declining market share of laundry detergents and the gradual rise of liquid detergents, the latest detergent market research reveals that laundry detergent pods are experiencing even more astonishing market growth. Despite this, powdered detergents still hold a significant market share, driven by the preference for different formulations among different consumer groups. This also demonstrates the irreplaceable nature of powdered detergents in certain areas.

[0003] The rapid growth and consumer popularity of laundry detergent pods are driven by their inherent concentration, versatility, aesthetic appeal, and reduced damage to clothing. However, laundry detergent pods still have some drawbacks, such as the difficulty in adding bleaching agents like peroxide and hypochlorite. This also presents challenges in cleaning some pigmented stains. Therefore, powder-liquid laundry detergent pods offer the advantages of pure liquid pods while also allowing for the addition of more stable and safer bleaching agents, preserving the excellent properties of the powder material.

[0004] For powder-liquid laundry beads, the liquid cavity raw materials can be prepared with conventional surfactants, organic solvents, and additives, and the powder cavity raw materials can be prepared with peroxide particles, soap powder, or other solid surfactants and additives. The laundry beads are encapsulated into powder-liquid laundry beads using laundry beads equipment. For example, although the powder-liquid laundry beads prepared using peroxide particles as the powder cavity material by the above method can have a cleaning effect on a wider range of stain types, it is limited by factors such as the size of the laundry beads cavity loading capacity (the laundry beads loading capacity generally does not exceed 20g), the peroxide content, and the effective action rate. Therefore, the removal effect is relatively weak, and even some commercially available laundry beads cannot meet the requirements for the decontamination of three national standard dirty cloths, JB01, JB02, and JB03, and there is no obvious technical progress compared to pure liquid laundry beads. In addition, if a high-content surfactant powder material is used as the powder cavity to prepare powder-liquid laundry beads, although it can meet the national standard for cleaning dirty cloths, due to the fluidity and dryness of the high-content surfactant particles, it is easy to cause difficulty in feeding or uneven discharge during production.

[0005] In summary, it is urgent to research and develop a technical solution for powder-liquid type laundry detergent beads to solve the problems existing in the existing technology. Summary of the Invention

[0006] Based on this, the present invention provides a powder-liquid laundry detergent pod to overcome the shortcomings of existing technologies. This technical solution is suitable for stable and safe powder-liquid laundry detergent pods with bleaching properties. These laundry detergent pods utilize additives in both powder and liquid forms to promote the decomposition of active oxygen materials and fabric penetration, maximizing the active oxygen's cleaning properties.

[0007] One object of the present invention is to provide a powder-liquid type laundry detergent condenser bead, the powder-liquid type laundry detergent condenser bead comprising a powder cavity and a liquid cavity;

[0008] The powder cavity contains powder; the liquid cavity contains concentrated liquid;

[0009] The powder includes the following components by mass fraction:

[0010]

[0011] in,

[0012] The mass ratio of the powder to the concentrated liquid is 1:1-4:1;

[0013] The chelating agent has the following general structural formula:

[0014]

[0015] R is selected from one of H, Na, and K;

[0016] Preferably, R is Na.

[0017] In a high-temperature alkaline environment, the chelating agent can complex and catalyze the sediments produced during the bleaching process, thereby further improving the cleaning effect and reducing the generation of carbonate and silicate type dirt.

[0018] The alkyl pyrrolidone has the following general structural formula:

[0019]

[0020] R1 is selected from an alkyl group having 6 to 16 carbon atoms, or an alkyl derivative having 6 to 16 carbon atoms;

[0021] Preferably, the alkyl pyrrolidone is selected from one or more of octyl pyrrolidone and dodecyl pyrrolidone;

[0022] More preferably, the alkyl pyrrolidone is octyl pyrrolidone.

[0023] Preferably, the powder comprises the following components in mass fractions:

[0024] Chelating agent 2-15%

[0025] Percarbonate 60-90%

[0026] Detergent A 5-30%;

[0027] The concentrate includes the following components by mass fraction:

[0028]

[0029] Furthermore, the percarbonate is a coated percarbonate.

[0030] Furthermore, the coated percarbonate is selected from one or more of coated sodium percarbonate, coated potassium percarbonate or coated calcium percarbonate.

[0031] Preferably, the coated percarbonate is coated sodium percarbonate.

[0032] Since the coated percarbonate can quickly release active oxygen when it comes into contact with water, the active oxygen can break the chemical bonds between organic pigments and fibers, and oxidize and decompose the stains into small molecules soluble in water, making them easy to clean. The coated percarbonate can be used as the main raw material of the powder and combined with the concentrated liquid composition to prepare powder-liquid laundry beads, which can be used to remove stubborn pigment stains and bleach yellowing.

[0033] Furthermore, the alkaline neutralizer is selected from one or more of an inorganic alkaline neutralizer and an organic alkaline neutralizer.

[0034] Preferably, the inorganic alkaline neutralizing agent is selected from one or more of hydroxides, oxides, carbonates and bicarbonates.

[0035] Furthermore, the organic alkaline neutralizing agent is selected from one or more of monoethanolamine, diethanolamine, triethanolamine, isopropanolamine, and triisopropanolamine.

[0036] Furthermore, the surfactant is selected from one or more of anionic surfactants, nonionic surfactants, amphoteric surfactants, and cationic surfactants.

[0037] Furthermore, the anionic surfactant is selected from one or more of linear alkylbenzene sulfonic acid and its salts, fatty acids and their salts, alkyl sulfates, ethoxylated fatty alcohol sulfates, α-olefin sulfonates, sulfosuccinates, fatty acid alkyl ester sulfonates, and ethoxylated fatty alcohol ether carboxylates.

[0038] The cationic surfactant is selected from one or more of quaternary ammonium surfactants, heterocyclic surfactants and polymeric cationic surfactants.

[0039] The nonionic surfactant is selected from one or more of fatty alcohol alkoxylates, alkyl polyglycosides, fatty acid alkoxylates, fatty acid ethoxylates, fatty acid alkylolamides, and ethoxylated sorbitan esters.

[0040] The amphoteric surfactant is selected from one or more of an amino acid surfactant, an amine oxide surfactant, a betaine surfactant and an imidazoline surfactant.

[0041] Furthermore, the detergent aid A is selected from one or more of enzyme preparations, brighteners, acrylic polymers, carbonates, silicates, fragrances, and pigments.

[0042] Furthermore, the detergent aid B is selected from one or more of enzyme preparations, fluorescent whitening agents, preservatives, colorants, color stabilizers and fragrances.

[0043] Furthermore, the enzyme preparation is selected from one or more of enzyme preparations: protease, α-amylase, cellulase, hemicellulase, phospholipase, esterase, lipase, peroxidase / oxidase, pectinase, lyase, mannanase, cutinase, reductase, xylanase, debranching enzyme, tannase, pentosanase, maltanases, arabinase, and β-glucanase.

[0044] Furthermore, the preservative is selected from one or more of phenoxy alcohol, sodium benzoate, isothiazolinone and derivatives thereof.

[0045] Furthermore, the organic solvent is selected from one or more of ethanol, glycerol, propylene glycol, sorbitol, polyethylene glycol, diethylene glycol butyl ether, dipropylene glycol methyl ether, tripropylene glycol methyl ether, diethylene glycol butyl ether acetate, dipropylene glycol butyl ether and tripropylene glycol butyl ether.

[0046] The present invention also provides a method for preparing powder-liquid type laundry detergent beads, comprising the following steps:

[0047] S1. The chelating agent, percarbonate, and detergent aid A are mixed to obtain a powder;

[0048] S2. Mix water, alkyl pyrrolidone, alkaline neutralizer, surfactant, detergent aid B, and organic solvent, and stir to obtain a concentrate;

[0049] S3. The powder and the concentrated liquid are packaged in separate cavities to form a powder cavity and a liquid cavity to obtain powder-liquid type laundry beads.

[0050] Furthermore, step S2 further includes the following steps:

[0051] (1) Add the alkaline neutralizer to water and stir until it is completely dissolved;

[0052] (2) Add some organic solvent and stir until completely dissolved;

[0053] (3) Add sulfonic acid and saturated fatty acid, adjust pH to neutral, and stir to dissolve;

[0054] (4) Add other surfactants, alkyl pyrrolidone, detergent aid B, and the remaining amount of organic solvent, stir until the appearance is uniform, and obtain a concentrated solution.

[0055] The present invention has the following beneficial effects:

[0056] 1. During the use of the powder-liquid laundry beads prepared by the present invention, after the PVA film is completely dissolved, the percarbonate can quickly release active oxygen when it comes into contact with water. The active oxygen can break the chemical bond that binds the organic pigment to the fiber, causing the stain to be oxidized and decomposed into small molecules that are soluble in water, achieving an effect that is easy to clean. We unexpectedly discovered that the chelating agent, percarbonate, and alkyl pyrrolidone can synergistically significantly improve the ability to remove stains. This is because the alkyl pyrrolidone has a five-membered ring lactam structure that is beneficial to improving its penetration and wetting on the fiber, and its penetration and wetting properties vary with the change of the alkyl carbon number. In the present invention, the alkyl pyrrolidone is conducive to the active oxygen released after the decomposition of the percarbonate to penetrate into the interior of the fiber. At the same time, the carbonate ions that the percarbonate will decompose when the active oxygen takes effect will form a sediment with the calcium and magnesium ions in the water, and the chelating agent will complex with the sediment to reduce the formation of carbonate scale, further enhancing the decontamination effect.

[0057] 2. Since the chelating agent has a good stabilizing effect on percarbonate, it greatly reduces the release rate of active oxygen from sodium percarbonate in the powder-liquid laundry beads, retaining the product's long-term active oxygen cleaning ability. Moreover, after the alkyl pyrrolidone in the liquid cavity dissolves in water, it will further enhance the penetration capacity of active oxygen in the laundry beads, significantly improving the ability to remove stains, making the laundry beads have both excellent decontamination ability and strong stability. DETAILED DESCRIPTION

[0058] In order to more clearly illustrate the technical solutions of the present invention, the following examples are given. Unless otherwise stated, the raw materials, reactions and post-processing methods mentioned in the examples are common raw materials on the market and technical methods well known to those skilled in the art.

[0059] The terms "preferred," "preferably," "more preferred," and the like, used herein, refer to embodiments of the invention that may provide certain benefits under certain circumstances. However, other embodiments may also be preferred under the same or other circumstances. Furthermore, the recitation of one or more preferred embodiments does not imply that other embodiments are not useful, nor is it intended to exclude other embodiments from the scope of the invention.

[0060] It should be understood that, except in any operating examples, or where otherwise indicated, all numbers expressing, for example, quantities of ingredients used in the specification and claims are to be understood as being modified in all instances by the term "about." Accordingly, unless indicated to the contrary, the numerical parameters set forth in the following specification and appended claims are approximations that may vary depending upon the desired properties to be obtained by the present invention.

[0061] The percarbonate in the embodiment of the present invention is coated sodium percarbonate, purchased from Jinke Daily Chemicals, with the brand name SPCC.

[0062] The chelating agent in the embodiment of the present invention was purchased from Shandong Yuanlian Chemical Industry with the brand name IDS-Na4.

[0063] The detergent aid A in the embodiment of the present invention is an enzyme preparation purchased from DuPont, with the brand name EXCELLENZ P1000 alkaline protease.

[0064] The alkyl pyrrolidone in the embodiment of the present invention is octyl pyrrolidone, which is purchased from Ashland with the brand name LP-100.

[0065] The alkaline neutralizing agent in the embodiment of the present invention is monoethanolamine, which is purchased from BASF.

[0066] The surfactants in the embodiments of the present invention include:

[0067] Sulfonic acid: linear alkylbenzene sulfonic acid, carbon number 10-14, anionic surfactant;

[0068] APG: alkyl polyglycoside, nonionic surfactant;

[0069] AES: ethoxylated fatty alcohol sulfate, the carbon number of the fatty alcohol is 10-14, the average degree of ethoxylation is 2, the active matter content is about 70%, anionic surfactant;

[0070] AEO9: ethoxylated fatty alcohol, average degree of ethoxylation 9, nonionic surfactant;

[0071] XL-80: Ethoxylated isomeric decanol, average degree of ethoxylation 8, nonionic surfactant.

[0072] The saturated fatty acid in the examples of the present invention was purchased from PACIFIC OLEO Company with the brand name KORTACID C71.

[0073] The oleic acid in the examples of the present invention was purchased from PACIFIC OLEO Company with the brand name KORTACID 1811 (OLEICACID).

[0074] The polyethylene glycol in the embodiments of the present invention was purchased from Petronas with the brand name PEG-200.

[0075] The washing aid B in the embodiment of the present invention comprises:

[0076] Enzyme preparation, alkaline protease purchased from Novozymes, brand Savinase Ultra 16XL;

[0077] The preservative, a mixture of methylisothiazolinone and chloromethylisothiazolinone, was purchased from Rohm and Haas Electronic Materials Co., Ltd. under the brand name Preservative HG;

[0078] Liquid flavor, purchased from IFF Company, brand GGC-72694.

[0079] The sodium percarbonate in the comparative example of the present invention is mixed sodium percarbonate (non-coated type), purchased from Jinke Daily Chemicals, with the brand name SPC.

[0080] The 4A zeolite in the comparative example of the present invention was purchased from China Aluminum Shandong Co., Ltd. with the brand name Z-4A.

[0081] The penetrant in the comparative example of the present invention was purchased from Tesco Chemicals with the brand name JFC.

[0082] The components and corresponding mass fractions in the powder-liquid laundry detergent beads of Examples 1-3 are shown in Table 1.

[0083] Table 1 Components and their mass fractions in Examples 1-3

[0084]

[0085]

[0086] The preparation method of the powder-liquid type laundry detergent beads of Examples 1-3 comprises the following steps:

[0087] S1. The chelating agent, percarbonate, and detergent aid A are mixed to obtain a powder;

[0088] S2.(1) Add the alkaline neutralizer to water and stir until completely dissolved;

[0089] (2) Add 1 / 3 of the organic solvent and stir until completely dissolved;

[0090] (3) Add sulfonic acid and saturated fatty acid, neutralize, and stir to dissolve;

[0091] (4) Add other surfactants, alkyl pyrrolidone, detergent aid B, and the remaining organic solvent, stir until the appearance is uniform, and obtain a concentrated solution;

[0092] S3. The powder and the concentrated liquid are wrapped with a PVA film to form a powder cavity and a liquid cavity to obtain powder-liquid type laundry beads (wherein the mass ratio of the powder to the concentrated liquid is 1:1).

[0093] Comparative Examples 1-3 were prepared based on Example 2. The components and mass fractions of Comparative Examples 1-3 are shown in Table 2.

[0094] Table 2 Components and their mass fractions in Comparative Examples 1-3

[0095]

[0096]

[0097] The difference between the comparative example and Example 2 is that: in comparative example 1, the chelating agent IDS-Na4 is replaced by an equal mass of 4A zeolite; in comparative example 2, the coated sodium percarbonate SPCC is replaced by an equal mass of mixed sodium percarbonate SPC; and in comparative example 3, the alkyl pyrrolidone LP-100 is replaced by an equal mass of penetrant JFC. The other ingredients and preparation methods are the same.

[0098] Test Case

[0099] 1. Stability test

[0100] Test method:

[0101] High temperature stability: The powder-liquid laundry detergent beads compositions prepared in Example 2 and Comparative Examples 1-3 were respectively bottled and sealed, placed in a 45°C environment, and kept at a constant temperature for 1 month, and then returned to room temperature of 25°C. There was no significant change in the appearance of the composition, no discoloration or agglomeration in the powder cavity, no stratification, turbidity, gel or precipitation in the liquid cavity, and no damage to the water-soluble film, indicating that the high temperature stability was qualified.

[0102] Low-temperature stability: The powder-liquid laundry detergent beads prepared in Example 2 and Comparative Examples 1-3 were sealed in bottles and placed in a constant temperature environment at 0°C for one month. The beads were then removed and immediately observed. The appearance of the beads remained unchanged, with no agglomeration in the powder cavity, no delamination, turbidity, gelation, or precipitation in the liquid cavity, and no damage to the water-soluble coating, indicating acceptable low-temperature stability.

[0103] Room temperature stability: The powder-liquid laundry detergent beads compositions prepared in Example 2 and Comparative Examples 1-3 were sealed in bottles and placed at room temperature (25°C). After one month, there was no discoloration or agglomeration in the powder cavity, no stratification, turbidity, gel or precipitation in the liquid cavity, and no damage to the water-soluble film, indicating that the room temperature stability was qualified.

[0104] The stability test results are shown in Table 3:

[0105] Table 3 Stability test results of Example 2 and Comparative Examples 1-3 Powder-liquid laundry beads

[0106]

[0107] The test results show that the laundry beads of Example 2 can ensure the stability of the sample at various test temperatures, while the laundry beads of Comparative Examples 1-3 have poor stability. This is because in Comparative Example 1, 4A zeolite is used in the powder cavity instead of IDS-Na4. Due to the special porous network structure of 4A zeolite itself, it has a strong adsorption capacity, which accelerates the transfer and exchange capacity between the water-soluble film and external substances, resulting in a slight whitening of the surface of the water-soluble film of the laundry beads. In Comparative Example 2, non-encapsulated sodium percarbonate SPC is used instead of encapsulated SPCC. Since the non-encapsulated SPC itself has poor storage stability, it is more likely to release active oxygen during storage, and active oxygen can penetrate into the liquid cavity, causing the liquid cavity to turn yellow. In Comparative Example 3, since the penetrant JFC is used in the liquid cavity, it affects the stability of the liquid combination in the liquid cavity, and a slight fogging phenomenon appears in the high-temperature stability and low-temperature stability liquid cavities.

[0108] 2. International stain removal test:

[0109] The detergent removal test method involved testing the powder-liquid laundry detergent compositions prepared in Example 2 and Comparative Examples 1-3 for detergency according to GB / T 13174-2008 Detergents for Clothing - Determination of Detergency and Wash Cycle Performance. Different concentrations were used for the standard laundry detergent and the powder-liquid laundry detergent compositions prepared in Example 2 and Comparative Examples 1-3 to ensure similar surfactant content in the samples.

[0110] Among them, JB01 is a carbon black oil-stained cloth; JB02 is a protein-stained cloth; and JB03 is a sebum-stained cloth.

[0111] The test results are shown in Table 4, where the P value represents the cleaning ratio. Generally, a standard laundry detergent is used as a reference sample, and its cleaning ratio is set to 1.00; a higher P value indicates better cleaning performance.

[0112] Table 4 Decontamination test results of laundry beads and standard laundry detergents of Example 2 and Comparative Examples 1-3

[0113]

[0114] As can be seen from Table 4, the laundry beads in Example 2 have significantly better cleaning effects on carbon black, protein, and sebum than standard laundry detergents, especially on carbon black and sebum. Among them, protein-stained cloth is mainly affected by the content of proteases and surfactants. Since the chelating agent IDS-Na4 in Comparative Example 1 is replaced by 4A zeolite of equal mass, it cannot produce obvious synergistic effects with the cleaning power of coated sodium percarbonate SPCC, resulting in a decrease in the cleaning ability of carbon black-stained cloth. In Comparative Example 2, since the coated sodium percarbonate SPCC is replaced by the non-coated sodium percarbonate SPC of equal mass, the cleaning power of carbon black and sebum is greatly affected. Comparative Example 3 replaces alkyl pyrrolidone LP-100 with penetrant JFC, which has a negative impact on the cleaning effect of the three types of stained cloth.

[0115] 3. Actual stain removal test of dirty cloth:

[0116] The detergent removal test method involved testing the powder-liquid laundry detergent compositions prepared in Example 2 and Comparative Examples 1-3 for detergency according to GB / T 13174-2008 Detergents for Clothing - Determination of Detergency and Wash Cycle Performance. Different concentrations were used for the standard laundry detergent and the powder-liquid laundry detergent compositions prepared in Example 2 and Comparative Examples 1-3 to ensure similar surfactant content in the samples.

[0117] Among them, the dirty cloths were replaced with actual dirty cloths made by the technical researchers themselves. The actual dirty cloths were YK01 for grass coffee dirty cloth, YK02 for chocolate iodine dirty cloth, and YK03 for soy sauce and black tea dirty cloth.

[0118] The preparation method of the YK01 grass coffee rag is as follows: ① using grass pressed liquid and Nestle coffee in a mass ratio of 1:1, and then adding water to prepare a 100g / L mixed rag; ② knitted cotton cloth is immersed at room temperature according to a bath ratio of 1:20 for 10 minutes; ③ using a padder to press the immersed rag to make its liquid ratio 1:1, drying it, and cutting it into 6cm*6cm rags for later use.

[0119] The preparation method of the YK02 chocolate iodine stained cloth is as follows: ① adding 20g of Dove chocolate to 1L of water at 70°C for dissolution to prepare a 20g / L stained liquid; ② mixing the stained liquid prepared in ① with 1g / L of iodine tincture in a mass ratio of 1:1 to prepare a stained liquid; ③ impregnating knitted cotton cloth at room temperature according to a bath ratio of 1:20 for 10 minutes; ④ using a padder to press the impregnated stained cloth to make its liquid-carrying ratio 1:1, drying it, and cutting it into 6cm*6cm stained cloth for later use.

[0120] The preparation method of the YK03 soy sauce and black tea stained cloth is as follows: ① adding 5g of black tea to 1L of water, boiling and filtering; ② mixing the stained liquid prepared in ① with Haitian soy sauce in a mass ratio of 2:1 to prepare a stained liquid; ③ impregnating knitted cotton cloth at room temperature in a bath ratio of 1:20 for 10 minutes; ④ using a padder to press the impregnated stained cloth to make its liquid carrying ratio 1:1, drying it, and cutting it into 6cm*6cm stained cloth for later use.

[0121] The test results are shown in Table 5, where the P value represents the cleaning ratio. Generally, a standard laundry detergent is used as a reference sample, and its cleaning ratio is set to 1.00; a higher P value indicates better cleaning performance.

[0122] Table 5 Decontamination test results of laundry beads and standard laundry detergents of Example 2 and Comparative Examples 1-3

[0123]

[0124]

[0125] Coated sodium percarbonate SPCC produces active oxygen during the dissolution process, which can decompose many stains and thus play a cleaning role. This test includes a variety of stains that are sensitive to active oxygen, such as coffee, chocolate, black tea, iodine tincture, etc.

[0126] As can be seen from Table 5, the laundry detergent beads in Example 2 were more effective at removing grassy coffee, chocolate iodine, and soy sauce black tea than standard laundry detergent. In Comparative Example 1, the chelating agent IDS-Na4 was replaced with an equal mass of 4A zeolite, while in Comparative Example 2, the coated sodium percarbonate SPCC was replaced with an equal mass of uncoated sodium percarbonate SPC. In Comparative Example 3, the alkyl pyrrolidone LP-100 was replaced with the penetrant JFC. As can be seen, the efficacy of the coated sodium percarbonate SPCC in Comparative Examples 1 and 3 was affected, resulting in a decrease in detergency. In Comparative Example 2, the replacement of the coated sodium percarbonate SPCC with uncoated sodium percarbonate SPC made the laundry detergent beads more difficult to remove stains such as coffee, chocolate, and tea.

[0127] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations that come within the meaning and range of equivalents of the claims be embraced therein.

[0128] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A powder-liquid type laundry detergent bead, characterized in that: The powder-liquid laundry beads include a powder cavity and a liquid cavity; The powder cavity contains powder; the liquid cavity contains concentrated liquid; The powder includes the following components by mass fraction: Chelating agent 2-20% Percarbonate 50-95% Detergent A 0.1-35%; The concentrate includes the following components by mass fraction: Alkyl pyrrolidone 0.1-10% Alkaline neutralizer 0.1-10% Surfactant 40-70% Detergent B 0.01-20% Organic solvent 10-50% Water balance; in, The mass ratio of the powder to the concentrated liquid is 1:1-4:1; The chelating agent has the following general structural formula: R is selected from one of H, Na, and K; The alkyl pyrrolidone has the following general structural formula: Said R1 is selected from an alkyl group having 6 to 16 carbon atoms; The percarbonate is a coated percarbonate; The coated percarbonate is selected from one or more of coated sodium percarbonate, coated potassium percarbonate or coated calcium percarbonate; The alkaline neutralizing agent is monoethanolamine; The organic solvent is selected from one or more of glycerol, propylene glycol, sorbitol, polyethylene glycol, and ethanol; The washing aid A is selected from one or more of enzyme preparations, brighteners, acrylic polymers, carbonates, silicates, essences, and pigments; The detergent builder B is selected from one or more of enzyme preparations, fluorescent whitening agents, preservatives, colorants, color stabilizers and liquid fragrances.

2. The powder-liquid laundry detergent beads according to claim 1, characterized in that: The powder includes the following components by mass fraction: Chelating agent 2-15% Percarbonate 60-90% Detergent A 5-30%; The concentrate includes the following components by mass fraction: Alkyl pyrrolidone 0.1-10% Alkaline neutralizer 1-8% Surfactant 45-65% Detergent B 1-8% Organic solvent 20-40% Water balance.

3. The powder-liquid laundry detergent beads according to claim 1, characterized in that: The surfactant is selected from one or more of anionic surfactants, nonionic surfactants, amphoteric surfactants, and cationic surfactants.

4. The method for preparing the powder-liquid laundry detergent beads according to any one of claims 1 to 3, characterized in that: The steps include: S1. The chelating agent, percarbonate, detergent aid A are mixed to obtain a powder; S2 water, alkyl pyrrolidone, alkaline neutralizer, surfactant, detergent aid B, organic solvent are mixed and stirred to obtain a concentrate; S3. The powder and the concentrated liquid are packaged in separate cavities to form a powder cavity and a liquid cavity to obtain powder-liquid laundry beads.

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