An antibacterial laundry detergent bead film, its preparation method and application

Abstract

The present invention belongs to the technical field of daily chemical products, and particularly relates to an antibacterial laundry bead film and its preparation method and application. The antibacterial laundry bead film is prepared from the following raw materials in parts by weight: 10 - 20 parts of polyvinyl alcohol with a hydrolysis degree of 70 - 80; 1 - 5 parts of polyethylene glycol; 1 - 3 parts of water-soluble polyether ester; 1 - 5 parts of plasticizer; 1 - 2 parts of silver salt; 1 - 10 parts of silver ion stabilizer; 85 - 100 parts of water. In the present invention, the silver antibacterial agent is loaded on the film of the laundry beads, avoiding the reaction or interaction between silver ions and components such as surfactants in the content, resulting in the inactivation of the antibacterial property of silver ions, thereby maintaining the antibacterial activity of silver ions and not causing harm to the skin. The obtained antibacterial laundry bead film of the present invention has excellent antibacterial property and a long duration.

Description

Technical Field

[0001] The present invention belongs to the technical field of daily chemical products, and particularly relates to an antibacterial laundry bead film, a preparation method thereof and an application thereof. Background Art

[0002] Silver ions are a broad-spectrum antibacterial agent, which are non-toxic, odorless, non-irritating and non-resistant to drugs. They can replace synthetic antibacterial agents and are widely used in the disinfection of hospitals and public places, personal hygiene, water environmental protection and other fields. However, silver ions have high activity and are easily affected by other substances and lose their effectiveness, resulting in poor compatibility. Due to the complex components of detergents, cosmetics, etc., it is difficult to apply silver ions in these products.

[0003] Most of the currently popular antibacterial laundry detergents add chemically synthesized antibacterial agents, which have certain insecurity. If silver ion antibacterial agents are to be added, the silver ions must be stabilized, such as through complexation, nanometerization and physical isolation technologies. Laundry beads are a high-concentration laundry detergent designed specifically for machine washing, with easy metering. One laundry bead can wash a bucket of clothes. Some antibacterial laundry beads also add chemical antibacterial agents, but they are not suitable for using silver ion antibacterial agents due to poor compatibility with the components of the laundry detergent and low water content. The main film-forming agent of the laundry bead envelope is polyvinyl alcohol with low hydrolysis degree, and the others are functional additives such as plasticizers, such as polyhydroxy compounds such as glycerol, sorbitol, and ethylene glycol. The above compounds cannot stably complex silver ions and have strong reducing ability, which is not conducive to the stability of silver ions.

[0004] The Chinese invention patent application with publication number CN114933937A discloses a long-lasting antibacterial laundry detergent condensate composition, comprising the following components, by mass percentage: 5-80% anionic surfactant, 5-80% nonionic surfactant, 0.1-5% long-acting antibacterial agent, 0.1-5% inorganic antibacterial agent, 0.01-10.0% chelating agent, 1-80% solvent, 0.1-3% active enzyme, other ingredients and the remainder of water, wherein the long-acting antibacterial agent is 4,4-dichloro-2-hydroxydiphenyl ether, the inorganic antibacterial agent is a silver ion antibacterial agent, the silver ion antibacterial agent includes silver element or silver compound, the silver compound includes any one of silver nitrate, silver lactate, silver oxide, and high silver oxide, the other ingredients include water, pH adjuster, whitening agent, thickener, solubilizer, preservative, flavor or pigment at least one, the active enzyme includes protease, lipase, cellulase, amylase, mannanase at least one. The invention improves the rapid and long-lasting antibacterial effects, and can be compounded with anionic surfactants, which is highly safe. However, the patented laundry detergent beads composition uses a silver ion / dichlorohydroxydiphenyl ether composite antibacterial agent, and the various enzymes in the formula are active proteins, which can easily react strongly with silver to inactivate silver ions. In addition, chlorohydroxydiphenyl ether is irritating to the human body.

[0005] The Chinese invention patent application with the publication number CN111808688A discloses an antibacterial laundry gel bead and a preparation method thereof, wherein the laundry gel bead comprises the following components by mass percentage: 20-38% sodium isethionate, 10-30% sodium alkyl sulfate, 10-20% fatty alcohol polyoxyethylene ether, 5-15% ethoxylated amide, 12-30% solubilizer, 2-9% builder, 1-3% antibacterial agent, 0.1-1% antibacterial synergist, and 0.5-3% fragrance. The invention solves the problems of poor stability, easy oxidation and denaturation, and decreased activity of silver ion antibacterial agents in fabric detergents in the prior art, and at the same time enables the laundry gel bead to have excellent antibacterial effect and 4 times the cleaning power. However, the antibacterial agent used in this patent is DM930 silver ion antibacterial agent or JewelSilverⅡ silver ion antibacterial agent. DM930 silver ion antibacterial agent is an antifungal, antibacterial and deodorant used on textiles by Dow Chemical Company of the United States. JewelSilverⅡ silver ion antibacterial agent is a female intimate care product produced by Hahn Company of Germany. The former is ionic silver and will also react strongly with other ingredients to become inactivated. The latter is elemental nanosilver, which is very expensive and has no market significance.

[0006] The Chinese invention patent application with the publication number CN113430067A discloses an antibacterial and acaricidal laundry bead and its preparation method. The cleaning liquid in the laundry bead includes the following components in mass percentage: surfactant 14% - 86%; propylene glycol 5% - 25%; glycerol 5% - 15%; triethanolamine 1% - 15%; water 1% - 10%; polyacrylamide 0.5% - 6%; citric acid 0 - 2%; silver ion antibacterial agent 0.2% - 3.5%; preservative 0 - 0.1%; enzyme 0 - 1%; essence 0 - 2%. By adding polyacrylamide as a stabilizer for the silver ion antibacterial agent and using a specific compound of non-ionic surfactant and anionic surfactant, the obtained laundry bead has excellent antibacterial stability and extremely high detergency. However, in this patent bead, polyacrylamide is added as a stabilizer for the silver ion antibacterial agent. Polyacrylamide is a high molecular weight polymer with amide groups in its side chains. The electron-donating ability of this group is very weak and it has no ability to coordinate with silver ions. The stabilizing effect depends on the encapsulation of silver ions by polyacrylamide macromolecules, but this will cause a significant reduction in the activity of silver ions.

[0007] The invention patent with the publication number CN111088129B discloses a detergent bead containing a thermoplastic polyvinyl alcohol film and its preparation method, mainly solving the problem that the interaction between detergent components in the prior art will affect the washing efficiency. By adopting a detergent bead including a packaging film and a detergent encapsulated in the chamber formed by the packaging film; the packaging film at least includes a water-soluble polyvinyl alcohol film containing the following components in parts by weight: a) 60 - 95 parts of polyvinyl alcohol; b) 5 - 30 parts of a plasticizer; wherein, the plasticizer is selected from dipropylene glycol and at least one of the combinations selected from ethylene glycol, propylene glycol, glycerol, pentaerythritol, diethylene glycol, triethylene glycol, tetraethylene glycol, dipropylene glycol tris, tetrapropylene glycol tris, and glycerol monomethyl ether. The technical solution preferably solves the existing problems and can be used as a packaging material for detergent beads. However, in this patent, polyvinyl alcohol (PVA) is modified into thermoplastic PVA, and no antibacterial components are added to the thermoplastic PVA film. Summary of the Invention

[0008] To overcome the above defects, the purpose of the present invention is to provide an antibacterial laundry bead film, its preparation method and application.

[0009] To achieve the above purpose, the present invention adopts the following technical solutions:

[0010] An antibacterial laundry bead film is prepared from the following raw materials in parts by weight:

[0011] 10 - 20 parts of polyvinyl alcohol with a degree of hydrolysis of 70 - 80;

[0012] 1 - 5 parts of polyethylene glycol;

[0013] 1 - 3 parts of water - soluble polyether ester;

[0014] 1 - 5 parts of plasticizer;

[0015] 1 - 2 parts of silver salt;

[0016] 1 - 10 parts of silver ion stabilizer;

[0017] 85 - 100 parts of water.

[0018] Preferably, the polyethylene glycol is polyethylene glycol 3000, polyethylene glycol 6000 and polyethylene glycol 8000, and the weight ratio of the three is 2 - 4:1 - 3:1.

[0019] Preferably, the water - soluble polyether ester is an esterification product of polyethylene glycol and fatty acid.

[0020] Preferably, the water - soluble polyether ester is an esterification product of polyethylene glycol 400 - 600 and lauric acid.

[0021] Preferably, the plasticizer is one or more of glycerol, propylene glycol, diethanolamine and triethanolamine.

[0022] Preferably, the silver salt is one or more of silver nitrate, silver acetate, silver dihydrogen phosphate and silver sulfate.

[0023] Preferably, the silver ion stabilizer is one or more of cystine, histidine, methionine, N - acetylmethionine, citric acid, tartaric acid, malic acid, lactic acid and glycolic acid.

[0024] A preparation method of the above - mentioned antibacterial laundry bead film, comprising the following steps:

[0025] (1) Dissolve polyvinyl alcohol and plasticizer in water at 85 - 95 °C, and the amount of water is 45 - 55% of the total amount to obtain a first mixed solution;

[0026] (2) Dissolve water - soluble polyether ester and polyethylene glycol in water at 70 - 80 °C, and the amount of water is 25 - 35% of the total amount to obtain a second mixed solution;

[0027] (3) Dissolve silver salt and silver ion stabilizer in water respectively, and the amounts of water for the two are 5 - 10% and 10 - 15% of the total amount of water respectively. Under stirring conditions, add the silver salt aqueous solution to the silver ion stabilizer aqueous solution to obtain a third mixed solution;

[0028] (4) Mix the first mixed solution, the second mixed solution and the third mixed solution in sequence to obtain an antibacterial laundry bead film preparation solution;

[0029] (5) Decompress and defoam the antibacterial laundry bead film preparation solution, then stand for 2 - 3 h, and then make it into a film on a steel - belt casting machine to obtain the product.

[0030] Use of the above antibacterial laundry detergent beads film in preparing laundry detergent beads.

[0031] Preferably, the laundry detergent beads include the above antibacterial laundry detergent beads film and the laundry detergent liquid disposed inside the antibacterial laundry detergent beads film, and the laundry detergent liquid is made from raw materials in the following weight percentages: fatty alcohol polyoxyethylene ether 40 - 50%, potassium laurate 8 - 15%, dodecylphenol polyoxyethylene ether 5 - 12%, acrylic acid - acrylate copolymer 1 - 5%, glycerol 5 - 10%, propylene glycol 10 - 20%, essence 0.1 - 0.6%, anti - hard water agent 0.1 - 0.5%, preservative 0.01 - 0.2%, deionized water 8 - 15%.

[0032] Positive beneficial effects of the present invention:

[0033] 1. The content in the laundry detergent beads prepared by the prior art is a concentrate of ordinary laundry detergent liquid, and the film used for packaging the condensate is a water - soluble PVA material. The antibacterial agents in the antibacterial laundry detergent beads of the prior art are all added to the content. Silver ions are very active substances. If silver ions are added to the content, they will inevitably come into direct contact with components such as surfactants in the content, and it is very easy to react with the components in the content and lose their activity, and it will also reduce the decontamination effect. In the present invention, the silver antibacterial agent is loaded on the film of the laundry detergent beads, rather than added to the content of the beads. The water content in the content of the laundry detergent beads is very small and will not dissolve the film and cause silver ions to diffuse into the content. Silver ions exist in the film, avoiding the reaction or interaction between silver ions and components such as surfactants in the content, resulting in the failure of the antibacterial property of silver ions. Therefore, the long - term antibacterial activity of silver ions is maintained.

[0034] 2. Using chemical antibacterial agents will be adsorbed onto the clothes to be washed in a small amount and will cause harm to the skin. The silver salts in the present invention are one or more of silver nitrate, silver acetate, silver dihydrogen phosphate, and silver sulfate, which are inorganic antibacterial agents, having the advantages of being safe, non - toxic, and having long - term effectiveness. Combining them into the beads film makes the obtained laundry detergent beads have better antibacterial functions and will not cause harm to the skin. At the same time, the silver ion stabilizer further effectively stabilizes silver ions and can be well compatible with the polyvinyl alcohol material. The antibacterial laundry detergent beads film obtained by the present invention has excellent antibacterial property and a long duration. Specific embodiments

[0035] The present invention will be further described below in conjunction with some specific embodiments.

[0036] Example 1

[0037] An antibacterial laundry detergent beads film is prepared from raw materials in the following weight parts:

[0038] 10 parts of polyvinyl alcohol with a degree of hydrolysis of 70 - 80;

[0039] 1 part of polyethylene glycol;

[0040] 2 parts of water - soluble polyether ester;

[0041] 1 part of plasticizer;

[0042] 1 part of silver salt;

[0043] 2 parts of silver ion stabilizer;

[0044] 85 parts of water.

[0045] Furthermore, the polyethylene glycol is polyethylene glycol 3000, polyethylene glycol 6000 and polyethylene glycol 8000, and the weight ratio of the three is 2:1:1.

[0046] Furthermore, the water - soluble polyether ester is an esterification product of polyethylene glycol 400 and lauric acid.

[0047] Furthermore, the plasticizer is glycerol.

[0048] Furthermore, the silver salt is silver sulfate.

[0049] Furthermore, the silver ion stabilizer is a composition of cystine and citric acid, and the weight ratio is 1:1.

[0050] The preparation method of the above - mentioned antibacterial laundry bead film includes the following steps:

[0051] (1) Dissolve polyvinyl alcohol and plasticizer in water at 85 °C, and the amount of water is 50% of the total amount of water to obtain a first mixed solution;

[0052] (2) Dissolve water - soluble polyether ester and polyethylene glycol in water at 70 °C, and the amount of water is 30% of the total amount of water to obtain a second mixed solution;

[0053] (3) Dissolve silver salt and silver ion stabilizer in water respectively, and the amounts of water for the two are 10% and 10% of the total amount of water respectively. Under stirring conditions, add the silver salt aqueous solution to the silver ion stabilizer aqueous solution to obtain a third mixed solution;

[0054] (4) Mix the first mixed solution, the second mixed solution and the third mixed solution in sequence to obtain an antibacterial laundry bead film preparation solution;

[0055] (5) Decompress and defoam the antibacterial laundry bead film preparation solution, then let it stand for 2 h, and then make it into a film on a steel - belt casting machine. The film - making temperature is 60 °C, and an antibacterial laundry bead film with a thickness of 20 μm is obtained.

[0056] Example 2

[0057] An antibacterial laundry bead film is prepared from the following raw materials in parts by weight:

[0058] 12 parts of polyvinyl alcohol with a degree of hydrolysis of 70 - 80;

[0059] 2 parts of polyethylene glycol;

[0060] 1 part of water-soluble polyether ester;

[0061] 2 parts of plasticizer;

[0062] 1.3 parts of silver salt;

[0063] 1 part of silver ion stabilizer;

[0064] 90 parts of water.

[0065] Further, the polyethylene glycol is polyethylene glycol 3000, polyethylene glycol 6000, and polyethylene glycol 8000, and the weight ratio of the three is 3:2:1.

[0066] Further, the water-soluble polyether ester is an esterification product of polyethylene glycol 600 and lauric acid.

[0067] Further, the plasticizer is a composition of propylene glycol and diethanolamine, and the weight ratio is 2:1.

[0068] Further, the silver salt is silver nitrate.

[0069] Further, the silver ion stabilizer is a composition of methionine and tartaric acid, and the weight ratio is 1:1.

[0070] The preparation method of the above antibacterial laundry bead film includes the following steps:

[0071] (1) Dissolve polyvinyl alcohol and the plasticizer in water at 90°C, and the amount of water is 50% of the total amount of water, to obtain a first mixed solution;

[0072] (2) Dissolve the water-soluble polyether ester and polyethylene glycol in water at 80°C, and the amount of water is 25% of the total amount of water, to obtain a second mixed solution;

[0073] (3) Dissolve the silver salt and the silver ion stabilizer in water respectively, and the amounts of water for the two are 10% and 15% of the total amount of water respectively. Under stirring conditions, add the silver salt aqueous solution to the silver ion stabilizer aqueous solution to obtain a third mixed solution;

[0074] (4) Mix the first mixed solution, the second mixed solution, and the third mixed solution in sequence to obtain a preparation solution for the antibacterial laundry bead film;

[0075] (5) After decompressing and defoaming the preparation solution for the antibacterial laundry bead film, let it stand for 3 h, and then make a film on a steel belt type casting machine. The film-making temperature is 60°C, and an antibacterial laundry bead film with a thickness of 20 μm is obtained.

[0076] Example 3

[0077] An antibacterial laundry bead film is prepared from the following raw materials in parts by weight:

[0078] Polyvinyl alcohol with a degree of hydrolysis of 70 - 80, 14 parts;

[0079] Polyethylene glycol, 2 parts;

[0080] Water-soluble polyether ester, 1.5 parts;

[0081] Plasticizer, 3 parts;

[0082] Silver salt, 1.5 parts;

[0083] Silver ion stabilizer, 3 parts;

[0084] Water, 92 parts.

[0085] Furthermore, the polyethylene glycol is polyethylene glycol 3000, polyethylene glycol 6000 and polyethylene glycol 8000, and the weight ratio of the three is 3:2:1.

[0086] Furthermore, the water-soluble polyether ester is an esterification product of polyethylene glycol 600 and lauric acid.

[0087] Furthermore, the plasticizer is a composition of glycerol and triethanolamine, and the weight ratio is 2:1.

[0088] Furthermore, the silver salt is silver acetate.

[0089] Furthermore, the silver ion stabilizer is a composition of N-acetylmethionine and malic acid, and the ratio is 1:2.

[0090] The preparation method of the above antibacterial laundry bead film includes the following steps:

[0091] (1) Dissolve polyvinyl alcohol and plasticizer in water at 87 °C, and the amount of water is 50% of the total amount of water to obtain a first mixed solution;

[0092] (2) Dissolve water-soluble polyether ester and polyethylene glycol in water at 75 °C, and the amount of water is 35% of the total amount of water to obtain a second mixed solution;

[0093] (3) Dissolve silver salt and silver ion stabilizer in water respectively, and the amounts of water for the two are 5% and 10% of the total amount of water respectively. Under stirring conditions, add the silver salt aqueous solution to the silver ion stabilizer aqueous solution to obtain a third mixed solution;

[0094] (4) Mix the first mixed solution, the second mixed solution and the third mixed solution in sequence to obtain an antibacterial laundry bead film preparation solution;

[0095] (5) After subjecting the antibacterial laundry bead film preparation solution to reduced pressure defoaming, let it stand for 2 h, and then form a film on a steel belt casting machine at a film-forming temperature of 55 °C to obtain an antibacterial laundry bead film with a thickness of 20 μm.

[0096] Example 4

[0097] An antibacterial laundry bead film is prepared from the following raw materials in parts by weight:

[0098] Polyvinyl alcohol with a degree of hydrolysis of 70 - 80: 15 parts;

[0099] Polyethylene glycol: 3 parts;

[0100] Water-soluble polyether ester: 2 parts;

[0101] Plasticizer: 3.5 parts;

[0102] Silver salt: 1.8 parts;

[0103] Silver ion stabilizer: 5 parts;

[0104] Water: 96 parts.

[0105] Further, the polyethylene glycol is polyethylene glycol 3000, polyethylene glycol 6000, and polyethylene glycol 8000, and the weight ratio of the three is 4:2:1.

[0106] Further, the water-soluble polyether ester is an esterification product of polyethylene glycol 400 and lauric acid.

[0107] Further, the plasticizer is a composition of glycerol and diethanolamine, and the weight ratio is 2:1.

[0108] Further, the silver salt is silver dihydrogen phosphate.

[0109] Further, the silver ion stabilizer is a composition of N-acetylmethionine and lactic acid, and the weight ratio is 2:1.

[0110] The preparation method of the above antibacterial laundry bead film includes the following steps:

[0111] (1) Dissolve polyvinyl alcohol and the plasticizer in water at 90 °C, and the amount of water is 45% of the total amount of water to obtain a first mixed solution;

[0112] (2) Dissolve the water-soluble polyether ester and polyethylene glycol in water at 80 °C, and the amount of water is 30% of the total amount of water to obtain a second mixed solution;

[0113] (3) Dissolve the silver salt and the silver ion stabilizer in water respectively, and the amounts of water for the two are 10% and 15% of the total amount of water respectively. Under stirring conditions, add the silver salt aqueous solution to the silver ion stabilizer aqueous solution to obtain a third mixed solution;

[0114] (4) Mix the first mixture, the second mixture, and the third mixture in sequence to obtain a preparation solution for an antibacterial laundry bead film;

[0115] (5) After depressurizing and defoaming the preparation solution for the antibacterial laundry bead film, let it stand for 3 h, and then form a film on a steel belt casting machine at a film-forming temperature of 50 °C to obtain an antibacterial laundry bead film with a thickness of 20 μm.

[0116] Example 5

[0117] An antibacterial laundry bead film is prepared from the following raw materials in parts by weight:

[0118] 19 parts of polyvinyl alcohol with a degree of hydrolysis of 70 - 80;

[0119] 4 parts of polyethylene glycol;

[0120] 2.5 parts of water-soluble polyether ester;

[0121] 4 parts of plasticizer;

[0122] 2 parts of silver salt;

[0123] 8 parts of silver ion stabilizer;

[0124] 98 parts of water.

[0125] Furthermore, the polyethylene glycol is polyethylene glycol 3000, polyethylene glycol 6000, and polyethylene glycol 8000, and the weight ratio of the three is 2:3:1.

[0126] Furthermore, the water-soluble polyether ester is an esterification product of polyethylene glycol 500 and lauric acid.

[0127] Furthermore, the plasticizer is a composition of glycerol, propylene glycol, and triethanolamine with a weight ratio of 2:1:1.

[0128] Furthermore, the silver salt is a composition of silver sulfate and silver nitrate with a weight ratio of 1:2.

[0129] Furthermore, the silver ion stabilizer is a composition of cystine, N-acetylmethionine, and citric acid with a weight ratio of 1:1:1.

[0130] The preparation method of the above antibacterial laundry bead film includes the following steps:

[0131] (1) Dissolve polyvinyl alcohol and the plasticizer in water at 92 °C, and the amount of water is 50% of the total amount of water to obtain a first mixture;

[0132] (2) Dissolve the water-soluble polyether ester and polyethylene glycol in water at 78 °C, and the amount of water is 30% of the total amount of water to obtain a second mixture;

[0133] (3) Dissolve the silver salt and the silver ion stabilizer in water respectively. The amounts of water for the two are 10% and 10% of the total amount of water respectively. Add the silver salt aqueous solution to the silver ion stabilizer aqueous solution under stirring conditions to obtain a third mixed solution;

[0134] (4) Mix the first mixed solution, the second mixed solution and the third mixed solution in sequence to obtain a preparation solution for the antibacterial laundry bead film;

[0135] (5) After depressurizing and defoaming the preparation solution for the antibacterial laundry bead film, let it stand for 3 h, and then make it into a film on a steel belt casting machine. The film-making temperature is 70 °C, and an antibacterial laundry bead film with a thickness of 20 μm is obtained.

[0136] Example 6

[0137] An antibacterial laundry bead film is prepared from the following raw materials in parts by weight:

[0138] 20 parts of polyvinyl alcohol with a degree of hydrolysis of 70-80;

[0139] 5 parts of polyethylene glycol;

[0140] 3 parts of water-soluble polyether ester;

[0141] 5 parts of plasticizer;

[0142] 2 parts of silver salt;

[0143] 10 parts of silver ion stabilizer;

[0144] 100 parts of water.

[0145] Further, the polyethylene glycol is polyethylene glycol 3000, polyethylene glycol 6000 and polyethylene glycol 8000, and the weight ratio of the three is 3:2:1.

[0146] Further, the water-soluble polyether ester is an esterification product of polyethylene glycol 600 and lauric acid.

[0147] Further, the plasticizer is a composition of glycerol, propylene glycol and triethanolamine, and the weight ratio is 2:1:1.

[0148] Further, the silver salt is a composition of silver sulfate and silver acetate, and the weight ratio is 1:1.

[0149] Further, the silver ion stabilizer is cystine.

[0150] The preparation method of the above antibacterial laundry bead film includes the following steps:

[0151] (1) Dissolve the polyvinyl alcohol and the plasticizer in water at 95 °C. The amount of water is 55% of the total amount of water to obtain a first mixed solution;

[0152] (2) Dissolve the water-soluble polyether ester and polyethylene glycol in water at 80 °C, with the water volume being 25% of the total water volume, to obtain a second mixed solution;

[0153] (3) Dissolve the silver salt and the silver ion stabilizer in water respectively, with their water volumes being 10% and 10% of the total water volume respectively. Under stirring conditions, add the silver salt aqueous solution to the silver ion stabilizer aqueous solution to obtain a third mixed solution;

[0154] (4) Mix the first mixed solution, the second mixed solution, and the third mixed solution in sequence to obtain a preparation solution for the antibacterial laundry bead film;

[0155] (5) After decompressing and defoaming the preparation solution for the antibacterial laundry bead film, let it stand for 2 h, and then make it into a film on a steel belt casting machine. The film-making temperature is 50 °C, and an antibacterial laundry bead film with a thickness of 20 μm is obtained.

[0156] Example 7

[0157] Application of the antibacterial laundry bead film described in any one of the above Examples 1-6 in the preparation of laundry beads. The laundry beads include the above antibacterial laundry bead film and the laundry detergent provided inside the antibacterial laundry bead film. The laundry detergent is made from the following raw materials in weight percentages: fatty alcohol polyoxyethylene ether 45%, potassium laurate 15%, dodecylphenol polyoxyethylene ether 5%, acrylic acid-acrylate copolymer 3%, glycerol 9.39%, propylene glycol 12%, essence 0.1%, anti-hard water agent 0.5%, preservative 0.01%, deionized water 10%.

[0158] Example 8

[0159] Application of the antibacterial laundry bead film described in any one of the above Examples 1-6 in the preparation of laundry beads. The laundry beads include the above antibacterial laundry bead film and the laundry detergent provided inside the antibacterial laundry bead film. The laundry detergent is made from the following raw materials in weight percentages: fatty alcohol polyoxyethylene ether 40%, potassium laurate 10%, dodecylphenol polyoxyethylene ether 12%, acrylic acid-acrylate copolymer 5%, glycerol 5%, propylene glycol 19.2%, essence 0.4%, anti-hard water agent 0.3%, preservative 0.1%, deionized water 8%.

[0160] Example 9

[0161] Application of the antibacterial laundry bead film described in any one of the above-mentioned Embodiments 1-6 in preparing laundry beads. The laundry beads include the above-mentioned antibacterial laundry bead film and laundry detergent disposed inside the antibacterial laundry bead film. The laundry detergent is made of raw materials in the following weight percentages: fatty alcohol polyoxyethylene ether 50%, potassium laurate 8%, dodecylphenol polyoxyethylene ether 9%, acrylic acid-acrylate copolymer 1%, glycerol 6.1%, propylene glycol 10%, essence 0.6%, anti-hard water agent 0.1%, preservative 0.2%, deionized water 15%.

[0162] Bacteriostatic test

[0163] According to the "Evaluation Method for Antibacterial and Bacteriostatic Effects of Daily Chemical Products" QB / T2738-2012, the antibacterial laundry bead films of Embodiments 1-6 were diluted with water to 40,000 parts by weight respectively, and rapid bacteriostatic and persistent bacteriostatic test detections were carried out. The test results are shown in Table 1 and Table 2 respectively.

[0164] Table 1 Detection results of rapid bacteriostatic effect of antibacterial bead film

[0165] Example Silver concentration / ppm Action time / min Inhibition rate of Escherichia coli / % Inhibition rate of Staphylococcus / % Inhibition rate of Candida albicans / % 1 17 20 98.4 97.8 95.9 2 21 20 98.8 98.9 97.8 3 24 20 98.7 99.2 98.9 4 24 20 99,3 99.2 99.1 5 33 20 99.8 99.9 99.2 6 33 20 99.9 99.9 99.2

[0166] Table 2 Detection results of persistent bacteriostatic effect of antibacterial bead film

[0167] Example Silver concentration / ppm Continuous action time / h Inhibition rate of Escherichia coli / % Inhibition rate of Staphylococcus / % Inhibition rate of Candida albicans / % 1 17 24 98.4 97.7 95.5 2 21 24 98.7 98.8 97.6 3 24 24 98.8 99.3 98.7 4 24 24 99,3 99.2 99.0 5 33 24 99.7 99.9 99.2 6 33 24 99.9 99.9 99.1

[0168] As can be seen from Table 1 and Table 2, the antibacterial laundry bead film obtained by the present invention has excellent antibacterial properties and a long duration.

[0169] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Any other modifications or equivalent replacements made by those of ordinary skill in the art to the technical solutions of the present invention shall be covered by the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solutions of the present invention.

Claims

1. An antibacterial laundry bead film, characterized in that, it is prepared from the following raw materials in parts by weight: 10 - 20 parts of polyvinyl alcohol with a degree of hydrolysis of 70 - 80; 1 - 5 parts of polyethylene glycol; 1 - 3 parts of water-soluble polyether ester; 1 - 5 parts of plasticizer; 1 - 2 parts of silver salt; 1 - 10 parts of silver ion stabilizer; 85 - 100 parts of water; The water-soluble polyether ester is an esterification product of polyethylene glycol 400 - 600 and lauric acid; The silver salt is one or more of silver nitrate, silver acetate, silver dihydrogen phosphate, and silver sulfate; The silver ion stabilizer is one or more of cystine, histidine, methionine, N-acetylmethionine, citric acid, tartaric acid, malic acid, lactic acid, and glycolic acid.

2. The antibacterial laundry bead film according to claim 1, characterized in that, The polyethylene glycol is polyethylene glycol 3000, polyethylene glycol 6000, and polyethylene glycol 8000, and the weight ratio of the three is 2 - 4:1 - 3:

1.

3. The antibacterial laundry bead film according to claim 1, characterized in that, The plasticizer is one or more of glycerol, propylene glycol, diethanolamine, and triethanolamine.

4. A method for preparing the antibacterial laundry bead film according to any one of claims 1 - 3, characterized in that, it includes the following steps: (1) Dissolve polyvinyl alcohol and plasticizer in water at 85 - 95 °C, and the amount of water is 45 - 55% of the total amount to obtain a first mixed solution; (2) Dissolve water-soluble polyether ester and polyethylene glycol in water at 70 - 80 °C, and the amount of water is 25 - 35% of the total amount to obtain a second mixed solution; (3) Dissolve silver salt and silver ion stabilizer in water respectively, and the amounts of water for the two are 5 - 10% and 10 - 15% of the total amount of water respectively. Under stirring conditions, add the silver salt aqueous solution to the silver ion stabilizer aqueous solution to obtain a third mixed solution; (4) Mix the first mixed solution, the second mixed solution, and the third mixed solution in sequence to obtain an antibacterial laundry bead film preparation solution; (5) After decompressing and defoaming the antibacterial laundry bead film preparation solution, let it stand for 2 - 3 h, and then make it into a film on a steel belt type casting machine to obtain the product.

5. Application of the antibacterial laundry bead film according to any one of claims 1 - 3 in the preparation of laundry beads.

6. The application according to claim 5, characterized in that, The laundry bead includes the antibacterial laundry bead film and the laundry detergent arranged inside the antibacterial laundry bead film. The laundry detergent is made from the following raw materials in weight percentages: 40 - 50% of fatty alcohol polyoxyethylene ether, 8 - 15% of potassium laurate, 5 - 12% of dodecylphenol polyoxyethylene ether, 1 - 5% of acrylic acid - acrylate copolymer, 5 - 10% of glycerol, 10 - 20% of propylene glycol, 0.1 - 0.6% of essence, 0.1 - 0.5% of anti-hard water agent, 0.01 - 0.2% of preservative, and 8 - 15% of deionized water.