A washing and cleaning composition, its preparation method, and washing and cleaning sheets

Abstract

This application discloses a washing and cleaning composition, its preparation method, and a washing and cleaning sheet, belonging to the field of cleaning products. The washing and cleaning composition comprises the following components in parts by weight: amino acid surfactant: 10-30 parts; anionic surfactant: 1-20 parts; plant polysaccharide: 15-45 parts; form promoter: 5-15 parts; nonionic surfactant: 1-10 parts; amphoteric surfactant: 0.5-5 parts; plant extract: 0.5-5 parts; moisturizer: 0.5-5 parts; chelating agent: 0.1-5 parts; fragrance: 0-5 parts; enzyme preparation: 0-5 parts; water: 20-105 parts. The washing and cleaning sheet obtained by this application has the characteristics of low allergy and gentleness, can be directly applied to the skin, has a moderate dissolution rate, and moderate cleaning power, and can be used in shampooing, bathing, facial cleansing, hand washing, underwear cleaning, baby fabric cleaning, toy cleaning, and other fields.

Description

Technical Field

[0001] This application relates to the field of cleaning products, and in particular to a washing and cleaning composition, a method for preparing it, and washing and cleaning sheets. Background Technology

[0002] Amino acid surfactants, with their mildness, environmental friendliness, and multifunctionality, have become an ideal alternative to traditional surfactants and have gained increasing popularity in personal care, cosmetics, and cleaning products in recent years, especially for sensitive skin care, high-end personal care, and the development of green products. Existing applications include facial cleansing sheets with amino acid surfactants attached to cotton pads, which are convenient to carry, but are not easily dissolved and tend to shed powder. To enhance their solubility, there are also shampoo and conditioner sheets that use polyethylene glycol or polyvinyl alcohol as film-forming agents in addition to amino acid surfactants.

[0003] The disadvantage of using amino acid surfactants is the difficulty in thickening. Amino acid surfactants typically have a high critical micelle concentration, meaning a higher concentration is required to form micelles. Even with a large amount of amino acid surfactant added, the effective micelle concentration may still be insufficient to support the viscosity. Instead, the system may become thinner due to the dilution effect. Hydrophilic polyols may alter the polarity of the solvent, competing for water molecules and further weakening the interactions between surfactant micelles, interfering with their self-assembly behavior. This makes it difficult to form solid wash sheets with good flexibility in formulations where amino acid surfactants are the primary surfactant. Summary of the Invention

[0004] In order to improve the flexibility of shampoo and conditioner sheets with amino acid surfactants as the main surfactants, this application provides a shampoo and conditioner cleaning composition, a preparation method, and a shampoo and conditioner sheet.

[0005] Firstly, the cleaning and care composition provided in this application adopts the following technical solution:

[0006] A washing and cleaning composition, the raw materials for which are prepared include the following components in parts by weight:

[0007] Amino acid surfactants: 10-30 parts; anionic surfactants: 1-20 parts; plant polysaccharides: 15-45 parts; shape promoters: 5-15 parts; nonionic surfactants: 1-10 parts; amphoteric surfactants: 0.5-5 parts; plant extracts: 0.5-5 parts; humectants: 0.5-5 parts; chelating agents: 0.1-5 parts; fragrances: 0-5 parts; enzyme preparations: 0-5 parts; water: 20-105 parts.

[0008] The mass ratio of the amino acid surfactant to the anionic surfactant is (1.5-14):1, the total mass ratio of the amino acid surfactant, anionic surfactant, nonionic surfactant, and amphoteric surfactant to the mass ratio of the plant polysaccharide is (0.8-3.5):1, and the mass ratio of the plant polysaccharide to the growth promoter is (1-6):1.

[0009] By employing the above technical solution, plant polysaccharides, acting as thickeners, can significantly increase the viscosity of the slurry. This allows the system, with amino acid surfactants as the main surfactant, to also form dense foam, maintaining the slurry viscosity. Consequently, after the slurry is dried, it promotes the formation of the detergent sheets, giving them good flexibility. Secondly, by adjusting the ratio of amino acid surfactants to other surfactants, the system further helps maintain the slurry viscosity, promotes detergent sheet formation, and improves the detergency and degreasing capabilities of the detergent composition. Furthermore, the plant polysaccharides and the forming agent form a three-dimensional network structure, enhancing the flexibility of the detergent sheets and mitigating moisture absorption.

[0010] Plant polysaccharides are bio-based materials. Compared with shampoo and conditioner sheets that use petroleum-based materials such as polyethylene glycol or polyvinyl alcohol as film-forming agents, the shampoo and conditioner sheets of this application have the advantages of being non-irritating and highly degradable, which meets the current requirements of green environmental protection and safety. Moreover, plant polysaccharides can dissolve at room temperature or low temperature, so the resulting shampoo and conditioner sheets are suitable for different water temperatures in various seasons.

[0011] Optionally, the amino acid surfactant includes at least two of sodium lauryl / cocoylmethylaminopropionate, sodium lauryl / cocoylmethyltaurate, sodium cocoyl malic acid, sodium lauroyl aspartate, sodium lauryl / cocoyl glycinate, sodium lauryl / cocoyl glutamate, and sodium lauryl / cocoyl sarcosinate.

[0012] By adopting the above technical solution, the hydrophilic amino acid salt and hydrophobic fatty acid chain in the molecular structure of amino acid surfactant work synergistically to reduce the surface tension of the liquid and effectively remove oil and dirt. It is especially suitable for use on sensitive skin, achieving exfoliation and can be used to cleanse the skin, achieving the effect of washing and conditioning.

[0013] Optionally, the polysaccharide includes at least two of alginate, pectin, xanthan gum, guar gum, hydroxypropyl starch ether, methylcellulose, hydroxyethylcellulose, konjac glucomannan, hydroxypropyl methylcellulose, and pullulan.

[0014] By adopting the above technical solution, the plant polysaccharide has good water solubility and makes the slurry of the washing composition maintain dense foam, which helps to form washing and care sheets and improves the flexibility of washing and care sheets.

[0015] Optionally, the forming agent is a C3-C8 polyol.

[0016] By adopting the above technical solution, C3-C8 polyols can prevent plant polysaccharides from clumping when in contact with water, thus improving the dispersion stability of the slurry. In addition, during the preparation of the washing and care sheets, C3-C8 polyols can combine with multiple reaction sites of plant polysaccharides to form a three-dimensional network structure, increasing the cross-linking density, thereby enabling the washing and care sheets to be better molded and improving their toughness.

[0017] Optionally, the C3-C8 polyol includes at least one of glycerol, propylene glycol, butanediol, hexanediol, heptahydrin, and octanediol.

[0018] Optionally, the anionic surfactant includes at least one of sodium alkyl glycoside sulfosuccinate, sodium α-olefin sulfonate, and sodium alkyl hydroxyethyl sulfonate.

[0019] Optionally, the nonionic surfactant includes at least one of C8-18 alkyl glycosides, sophorolipids, rhamnolipids, lauryl / cocamidopropylamine oxide, and sucrose fatty acid esters; the amphoteric surfactant includes at least one of lauryl / cocamidopropyl hydroxysulfonate, lauryl / cocamidopropyl betaine, cocamidoethyl betaine, lauryl / cocamidopropyl hydroxysulfonate, sodium lauryl / cocamidopropyl acetate, and sodium lauryl / cocamidopropyl propionate.

[0020] Optionally, the C8-18 alkyl glycoside includes at least one of decyl glucoside, lauryl glucoside, alkyl maltodextrin, cetearyl glucoside, and palmitoside.

[0021] By adopting the above technical solutions, anionic surfactants, nonionic surfactants, and amphoteric surfactants work together to achieve the effects of cleaning and degreasing.

[0022] Optionally, the chelating agent includes at least one of sodium citrate, sodium gluconate, tetrasodium glutamate diacetate, trisodium methylglycine diacetate, sodium polyaspartate, and sodium polyglutamate.

[0023] By adopting the above technical solution, the chelating agent can chelate with metal ions in hard water or tap water, form a synergistic effect with plant polysaccharides to achieve better water softening, and the chelating agent can also play a role in adjusting the pH of the slurry.

[0024] Optionally, the moisturizer includes at least one of allantoin, dextran, biomimetic phospholipids, trehalose, and water-soluble olive oil.

[0025] By employing the above-mentioned technical solutions, in personal care, the moisturizer can form a transparent gel film on the epidermis, providing long-lasting hydration and repairing the skin and hair barrier. In fabric washing, the moisturizer can penetrate the fiber surface, repairing minor damage caused by friction, sun exposure, or chemical detergents, enhancing fabric resilience, and repairing protein fibers such as wool and silk, helping to restore elasticity and reduce pilling. It also helps fibers maintain moisture content and prevents dryness and brittleness.

[0026] Optionally, the plant extract includes at least one of the following: bacas fruit extract, large-flowered cocoa extract, babassu palm extract, rice bran extract, soapberry extract, camellia seed extract, aloe vera extract, and chamomile extract.

[0027] By adopting the above technical solutions, plant extracts have natural antibacterial and moisturizing effects on the skin.

[0028] Secondly, the preparation method of the washing and cleaning composition provided in this application adopts the following technical solution:

[0029] A method for preparing a washing and cleaning composition includes the following steps:

[0030] The plant polysaccharide and the shaping agent were stirred and mixed to moisten the solid powder of plant polysaccharide with the shaping agent, thus obtaining a premix.

[0031] Anionic surfactants and amino acid surfactants are mixed with preheated water. After the mixture is allowed to stand and dissolve until homogeneous, it is added to the premix in batches while stirring to obtain a mixture.

[0032] Add nonionic surfactants and amphoteric surfactants to the mixture, add a chelating agent to adjust the pH to 5.5-7, add plant extracts, continue stirring, add a humectant, continue stirring, add liquid enzyme preparations and fragrances to obtain a washing and cleaning composition.

[0033] By adopting the above technical solution, since a large amount of plant polysaccharides will clump together when directly combined with water, the plant polysaccharides on the outside of the clumps will swell after absorbing water, making it impossible for the plant polysaccharides inside to dissolve and first forming a premix. Therefore, the plant polysaccharides are first mixed and moistened with the forming agent to promote the subsequent dissolution of plant polysaccharides in the mixture.

[0034] After the anionic surfactant is mixed with water, it is allowed to dissolve without stirring, thus avoiding the formation of foam before the addition of plant polysaccharides. This helps the plant polysaccharides to fully absorb water and swell, providing a certain viscosity to the mixture and maintaining a dense foam.

[0035] Thirdly, the shampoo and conditioner sheet provided in this application adopts the following technical solution:

[0036] A shampoo and conditioner sheet is prepared by drying and slicing a shampoo and conditioner cleaning composition; wherein, if the enzyme preparation in the shampoo composition is a solid enzyme preparation, the enzyme preparation is not added when preparing the shampoo composition, and the enzyme preparation is sprinkled onto the slice.

[0037] By adopting the above technical solution, a shampoo and conditioner sheet containing amino acid surfactants and with good flexibility is obtained. The shampoo and conditioner sheet performs well in terms of stain removal and skin cleansing, and at the same time, it has high biodegradability and high environmental protection.

[0038] Optionally, the drying method of the washing composition is the casting method, which involves casting the slurry and then shaping it using a blower drying device.

[0039] In summary, this application has the following beneficial effects:

[0040] 1. Plant polysaccharides, acting as thickeners, significantly increase the viscosity of the slurry, enabling the system, where amino acid surfactants are the main surfactants, to form dense foam and maintain the slurry viscosity. This promotes the formation of shampoo and conditioner sheets after the slurry is dried, giving the sheets good flexibility. Secondly, the proportion of amino acid surfactants with other surfactants helps maintain the slurry viscosity, promotes the formation of shampoo and conditioner sheets, and improves the detergency and degreasing abilities of the washing composition, resulting in strong skin cleansing power. Furthermore, plant polysaccharides and the forming agent form a three-dimensional network structure, improving the flexibility of the shampoo and conditioner sheets and mitigating moisture absorption.

[0041] 2. The hydrophilic amino acid salt and hydrophobic fatty acid chain in the molecular structure of amino acid surfactants work synergistically to reduce the surface tension of liquids, effectively removing oil and dirt. They are especially suitable for sensitive skin, exfoliating and cleansing the skin for a washing and conditioning effect. Attached Figure Description

[0042] Figure 1 This is the magnified microscopic morphology of the shampoo and conditioner sheet used in Example 1 of this application.

[0043] Figure 2 This is the form of the shampoo and conditioner sheet after being folded in half, as described in Example 1 of this application.

[0044] Figure 3 This is the magnified microscopic morphology of the shampoo and conditioner sheet in Comparative Application Example 1 of this application.

[0045] Figure 4 This is the form of the shampoo and conditioner sheet after being folded in half, as shown in Comparative Application Example 1 of this application.

[0046] Figure 5 This is the form of the shampoo and conditioner sheet used in Comparative Application Example 2 of this application.

[0047] Figure 6 This is the form of the shampoo and conditioner sheet used in Comparative Application Example 3 of this application.

[0048] Figure 7 This is the form of the shampoo and conditioner sheet used in Comparative Application Example 4 of this application. Detailed Implementation

[0049] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.

[0050] Example 1

[0051] A washing and cleaning composition, the raw materials for which are prepared include the following components in parts by weight:

[0052] Amino acid surfactants: 26 parts; anionic surfactants: 14 parts; nonionic surfactants: 8 parts; amphoteric surfactants: 5 parts; plant polysaccharides: 16 parts; forming agents: 13 parts; plant extracts: 1.7 parts; humectants: 2 parts; chelating agents: 0.2 parts; enzyme preparations: 1 part; water: 45 parts.

[0053] Specifically, the amino acid surfactant is composed of 14 parts sodium lauroyl methyl aminopropionate and 14 parts sodium lauroyl sarcosinate;

[0054] The anionic surfactant is 2 parts sodium alkyl glycoside sulfosuccinate;

[0055] The nonionic surfactant is sophorolipid.

[0056] The amphoteric surfactant is cocamidopropyl hydroxysulfonate betaine;

[0057] The plant polysaccharide is composed of 30 parts alginate and 15 parts hydroxyethyl cellulose;

[0058] The shape promoter consists of 4 parts propylene glycol and 5 parts glycerol;

[0059] The plant extract consists of 0.1 parts of Bakas fruit extract, 0.1 parts of large-flowered cocoa extract, 0.1 parts of babassu palm extract, 1 part of rice bran extract, and 0.5 parts of soapberry extract.

[0060] The moisturizer consists of 0.5 parts allantoin and 0.5 parts biomimetic phospholipids;

[0061] The chelating agent consists of 0.4 parts sodium polyaspartate and 0.4 parts sodium polyglutamate.

[0062] The enzyme preparation is cellulase.

[0063] A method for preparing a washing and cleaning composition includes the following steps:

[0064] The plant polysaccharide and the shaping agent are stirred and mixed to completely wet the solid powder of plant polysaccharide, thus obtaining a premix.

[0065] Anionic surfactants and amino acid surfactants are mixed with water at 50°C. After standing and dissolving to a homogeneous state, the mixture is added in batches to the premix while stirring is started at a speed of 1050 r / min for 15 minutes. This allows the plant polysaccharides to fully absorb water and swell, providing viscosity to the slurry and obtaining a mixture. The viscosity of the mixture is controlled at 10000±5000 mPa·S.

[0066] Add nonionic surfactants and amphoteric surfactants to the mixture, add chelating agents to adjust the pH to the range of 5.5-7, then add plant extracts, continue stirring, add humectants, continue stirring, add enzyme preparations and fragrances to obtain a washing and cleaning composition.

[0067] Examples 2-7

[0068] The difference between Examples 2 to 7 of the washing and cleaning compositions and Example 1 is that the raw materials used to prepare the washing compositions are different, as shown in Table 1.

[0069] Table 1

[0070]

[0071]

[0072]

[0073] Comparative Example 1

[0074] A composition comprising the following raw materials in weight percentages:

[0075] Surfactant 35%, polyvinyl alcohol 24%, polyvinylpyrrolidone 3%, fragrance 0.1%, pigment 0.2%, aloe vera oil 0.2%, cucumber oil 0.2%, nanocomposite powder 9%, deionized water balance.

[0076] The raw materials in the nanocomposite powder are, by mass percentage, with the total amount of nanocomposite powder being 100%, of which nano-sized titanium dioxide is 58%, nano-sized zinc oxide is 36%, and nano-silver is 6%.

[0077] The raw materials in the surfactant are expressed as follows by mass percentage, with the total surfactant content being 100%, including 13% decyl glucoside, 25% sodium lauroyl glutamate, 14% sodium lauryl sulfate, 9% cocoyl propyl betaine, 25% dodecyl diethanolamine, 5% sodium pyrrolidone carboxylate, 2% isopropyl palmitate, 2% sodium dodecyl glucocarboxylate, and 5% dodecyl quaternary ammonium salt.

[0078] A method for preparing a composition, comprising the following steps:

[0079] Polyvinyl alcohol and polyvinylpyrrolidone were mixed and stirred to dissolve in water at 90°C.

[0080] Each component of the composite powder is dispersed and dissolved separately with an equal mass of water;

[0081] Then mix the above ingredients together and stir until well combined.

[0082] Comparative Example 2

[0083] The difference from Example 1 is that the raw materials used to prepare the washing and cleaning composition are different, specifically as follows: the amount of plant polysaccharide added is 7 parts, and the plant polysaccharide is composed only of hydroxyethyl cellulose; in Comparative Example 2, the ratio of the total mass of amino acid surfactant, anionic surfactant, nonionic surfactant and amphoteric surfactant to the mass of plant polysaccharide is 5.1:1.

[0084] Comparative Example 3

[0085] The difference from Example 1 lies in the raw materials used to prepare the washing and cleaning composition, as follows:

[0086] The amount of glycerol added was 16 parts, making the total amount of the shape promoter 20 parts. In Comparative Example 3, the mass ratio of plant polysaccharide to shape promoter was 2.25:1.

[0087] Comparative Example 4

[0088] The difference from Example 1 lies in the raw materials used to prepare the washing and cleaning composition, as follows:

[0089] The amount of glycerol added was 0, so the total amount of the shape promoter added was 4 parts. In Comparative Example 4, the mass ratio of plant polysaccharide to shape promoter was 11.25:1.

[0090] Comparative Example 5

[0091] The difference from Example 1 lies in the raw materials used to prepare the washing and cleaning composition, as follows:

[0092] The amount of alginate added was 50 parts, the amount of water added was 105 parts, and the ratio of the total mass of amino acid surfactant, anionic surfactant, nonionic surfactant and amphoteric surfactant to the mass of plant polysaccharide was 0.55:1.

[0093] Comparative Example 6

[0094] The difference from Example 1 lies in the raw materials used to prepare the washing and cleaning composition, as follows:

[0095] The amount of sodium alkyl glycoside sulfosuccinate added is 1.4 parts, so that the total amount of anionic surfactant added is 1.4 parts, and the mass ratio of amino acid surfactant to anionic surfactant is 20:1.

[0096] Application Example 1

[0097] A shampoo and conditioner sheet is made by drying and slicing the shampoo and conditioner cleaning composition obtained in Example 1.

[0098] The drying method is the casting method, which involves casting the slurry, conveying it in parallel after casting, and then shaping it through a blower drying device.

[0099] Application Examples 2-7

[0100] The difference between Application Examples 2 to 7 and Application Example 1 is that the shampoo and conditioner sheets in Application Examples 2 to 7 are sliced ​​from the shampoo and conditioner cleaning compositions prepared in Examples 2 to 7 after drying.

[0101] Comparative Application Examples 1-6

[0102] The difference between Comparative Application Examples 1 to 6 and Application Example 1 is that the Comparative Application Examples 1 to 6 are made by drying and slicing the washing and cleaning compositions prepared in Comparative Examples 1 to 6.

[0103] The shampoo and conditioner sheets prepared in Application Examples 1-7 exhibit good molding properties, do not shed powder, and are not easily broken. The microscopic image of the shampoo and conditioner sheet in Application Example 1 is shown below. Figure 1 As shown in Example 1, plant polysaccharides are used as film-forming agents. The overall structure is distributed in a staggered manner like natural fibers, and a loose network structure or slight inhomogeneity can be observed. The modifying groups of the film-forming agent disrupt the regularity of the molecular chains and significantly reduce the crystallinity, which makes the shampoo and conditioner sheets more flexible and easier to dissolve than PVA shampoo and conditioner sheets.

[0104] Furthermore, when the shampoo and conditioner sheet is folded twice and then unfolded, the sheet remains undamaged and the creases are not obvious. The shampoo and conditioner sheet used in Example 1 is an example of this. Figure 2 As shown.

[0105] This application describes a shampoo and conditioner sheet that uses amino acid surfactants as the main surfactant. The sheet can be easily molded and has good flexibility. Furthermore, the film-forming agent does not contain petroleum-based polyethylene glycol or polyvinyl alcohol, making it environmentally friendly.

[0106] In contrast to Application Example 1, where petrochemical-derived polyvinyl alcohol (PVA) was used as a film-forming agent, the pore distribution was denser, smoother, and more uniform. This is because the PVA molecular chains are relatively regular, allowing hydroxyl groups to form strong intramolecular and intermolecular hydrogen bonds. Unmodified PVA can form fairly complete crystalline regions, such as... Figure 3As shown. Even with rapid drying during the film-forming process, the film typically contains a high proportion of crystalline regions. These crystalline regions act as physical cross-linking points, providing strength and rigidity, but also contributing to its brittleness.

[0107] In contrast, the shampoo and conditioner sheet prepared in Application Example 1, although able to be shaped, has poor flexibility. When folded twice and then unfolded, the creases are obvious, and the sheet cannot regain its original shape. Figure 4 As shown.

[0108] In contrast, application example 2 failed to form sheets after drying, and the product remained granular. Figure 5 As shown.

[0109] In contrast, the shampoo and conditioner sheets prepared in Example 3 could not be dried into sheets and exhibited severe moisture absorption. Figure 6 As shown.

[0110] Compared to the shampoo and conditioner sheets prepared in Example 4, these sheets were severely brittle and cracked immediately after being folded in half. Figure 7 As shown.

[0111] In contrast, the shampoo and conditioner sheets prepared in Application Example 5 were severely brittle and could not be completely dissolved in water.

[0112] In contrast, in application example 6, the low consistency of the slurry prevented the formation of sheets.

[0113] The results of the above comparative application examples demonstrate that this application overcomes the problem of mutual interference between surfactant micelles by adjusting the proportions of plant polysaccharides, amino acid surfactants, and other surfactants, thereby obtaining a shampoo and conditioner sheet with good molding and high flexibility.

[0114] Performance testing

[0115] The following tests were conducted on the shampoo and conditioner sheets prepared using various application examples and application comparisons.

[0116] 1. Fabric stain removal test.

[0117] According to GB / T 13174-2021 "Determination of detergency and recycle performance of detergents for clothing", the washing water was hard water with 250 mg / kg CaCl2. The test fabrics were national standard carbon black JB-01 soiled fabric, national standard protein JB-02 soiled fabric, and national standard sebum JB-03 soiled fabric. The detergency was determined. The sample concentration was 0.05%, with 0.2% standard laundry detergent as a control. The detergency ratio Pi was obtained, where Pi ≥ 1.0 was considered qualified, and Pi < 1.0 was considered unqualified. The results are shown in Table 2.

[0118] Table 2 Decontamination Results

[0119] Application Example 1 1.59 1.32 1.88 qualified Application Example 2 1.56 1.43 1.93 qualified Application Example 3 1.44 1.34 1.84 qualified Application Example 4 1.20 3.29 1.87 qualified Application Example 5 1.62 1.59 1.86 qualified Application Example 6 1.48 2.87 1.73 qualified Application Example 7 1.52 2.04 1.76 qualified Comparative Application Example 1 1.13 1.05 1.30 qualified

[0120] 2. Skin water and oil content test.

[0121] Test participants: 100 volunteers aged 22-30 were selected and divided into 10 groups of 10 each; the cleansing and conditioning products were applied to the same location on the inside of the volunteers' arms, and no cosmetics other than the test products were allowed to be used during the test.

[0122] Test procedure: Before use, rinse the skin area to be tested with clean water, gently press with a towel until there is no water flowing on the surface, wait 10 minutes, and then use a skin moisture meter to test the oil and moisture content of the volunteer's skin; after washing with the cleansing and conditioning products, gently press with a towel until there is no water flowing on the skin surface, wait 10 minutes, and then use a skin moisture meter to test the oil and moisture content of the volunteer's skin.

[0123] The exfoliating effect of the product was evaluated using the skin moisture content change rate (WE%), and the oil-controlling effect was evaluated using the sebum content change rate (OE%). The specific calculation formulas are as follows:

[0124] Moisture content change rate WE (%) = [(Moisture content after product use - Moisture content before product use) / Moisture content before product use] × 100%;

[0125] Sebum content change rate OE (%) = [(Oil content after product use - Oil content before product use) / Oil content before product use] × 100%;

[0126] The average values ​​of the water content change rate (WE) and sebum content change rate (OE) of the 10 volunteers in each group were recorded as the water content change rate (WE) and sebum content change rate (OE) of that group. The average values ​​of the water content change rate (WE) and sebum content change rate (OE) of all 10 groups were then recorded as the average WE and OE values ​​of the exfoliating cleansing pads. The results are shown in Table 3.

[0127] Table 3 Results of changes in skin moisture and oil content

[0128] Application Example 1 24.13 -8.33 Application Example 2 13.64 -6.67

[0129] 3. Product safety testing.

[0130] In vitro skin irritation tests and human skin model tests (OECD TG 439 test) were conducted, and the test results are shown in Table 4.

[0131] Table 4 Results of in vitro skin irritation test

[0132]

[0133]

[0134] In vitro skin corrosion test: Reconstructed human epidermis (RhE) test method OECD TG 431 (2019), judged according to GB / T 26396-2011 "Safety Technical Specification for Soaps and Detergents". The test results are shown in Table 5.

[0135] Table 5 In vitro skin corrosion test

[0136]

[0137] 5. Degradation test.

[0138] According to Appendix A of the "Test Method for Biodegradability of Surfactants" (GB / T 15818-2018), and in accordance with the requirement of at least 90% primary biodegradability of surfactants in the "Safety Technical Specifications for Detergent Products" (GB / T 26396-2011), the test results are shown in Table 6.

[0139] Table 6 Degradation Results

[0140]

[0141]

[0142] Based on the above test results, it can be seen that the washing composition prepared in the examples, even with the presence of amino acid surfactants, can still exhibit good shampoo sheet forming effect, high flexibility, strong detergency, no skin irritation, and exfoliation and degreasing effects, meeting the requirements for skin cleansing. In addition, the use of bio-based plant polysaccharides to replace petroleum-based polyvinyl alcohol meets the current requirements for green and environmentally friendly washing products.

[0143] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this specific embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. A shampoo and conditioner sheet, characterized in that: It is prepared from raw materials comprising the following parts by weight, dried, and then sliced: Amino acid surfactants: 10-30 parts; anionic surfactants: 1-20 parts; plant polysaccharides: 15-45 parts; shape promoters: 5-15 parts; nonionic surfactants: 1-10 parts; amphoteric surfactants: 0.5-5 parts; plant extracts: 0.5-5 parts; Moisturizer: 0.5-5 parts; Chelating agent: 0.1-5 parts; Flavoring: 0-5 parts; Enzyme preparation: 0-5 parts; Water: 20-105 parts; The shaping agent is a C3-C8 polyol; The mass ratio of the amino acid surfactant to the anionic surfactant is (1.5-14):1; the total mass ratio of the amino acid surfactant, anionic surfactant, nonionic surfactant, and amphoteric surfactant to the mass ratio of the plant polysaccharide is (0.8-3.5):1; and the mass ratio of the plant polysaccharide to the growth promoter is (1-6):

1. The amino acid surfactant includes at least two of the following: sodium lauryl / cocoyl methyl aminopropionate, sodium lauryl / cocoyl methyl taurate, sodium cocoyl malic acid, sodium lauroyl aspartate, sodium lauryl / cocoyl glycinate, sodium lauryl / cocoyl glutamate, and sodium lauryl / cocoyl sarcosinate. The plant polysaccharides include at least two of the following: alginate, pectin, xanthan gum, guar gum, hydroxypropyl starch ether, methylcellulose, hydroxyethylcellulose, konjac glucomannan, hydroxypropyl methylcellulose, and pullulan. The anionic surfactant includes at least one of sodium alkyl glycoside sulfosuccinate, sodium α-olefin sulfonate, and sodium alkyl hydroxyethyl sulfonate. The nonionic surfactant includes at least one of C8-18 alkyl glycosides, sophorolipids, rhamnolipids, lauryl / cocamidopropylamine oxide, and sucrose fatty acid esters; the amphoteric surfactant includes at least one of lauryl / cocamidopropyl hydroxysulfonate, lauryl / cocamidopropyl betaine, cocamidoethyl betaine, lauryl / cocamidopropyl hydroxysulfonate, sodium lauryl / cocamidopropyl acetate, and sodium lauryl / cocamidopropyl propionate.

2. The shampoo and conditioner sheet according to claim 1, characterized in that: The chelating agent includes at least one of sodium citrate, sodium gluconate, tetrasodium glutamate diacetate, trisodium methylglycine diacetate, sodium polyaspartate, and sodium polyglutamate.

3. The shampoo and conditioner sheet according to claim 1, characterized in that: The moisturizer includes at least one of allantoin, dextran, biomimetic phospholipids, trehalose, and water-soluble olive oil.

4. A method for preparing a shampoo and conditioner sheet according to any one of claims 1-3, characterized in that: Includes the following steps: The plant polysaccharide and the shaping agent were stirred and mixed to moisten the solid powder of plant polysaccharide with the shaping agent, thus obtaining a premix. Anionic surfactants and amino acid surfactants are mixed with preheated water. After the mixture is allowed to stand and dissolve until homogeneous, it is added to the premix in batches while stirring to obtain a mixture. Add nonionic surfactants and amphoteric surfactants to the mixture, add chelating agents to adjust the pH to 5.5-7, add plant extracts, continue stirring, add humectants, continue stirring, and add or omit enzyme preparations and fragrances as needed to obtain a washing and cleaning composition. The shampoo and conditioner sheets are prepared by drying the shampoo and conditioner composition and then slicing it.

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