Solid shampoo soap for improving hair smoothness and preparation method of solid shampoo soap

Abstract

The invention relates to a solid shampoo soap for improving hair smoothness and a preparation method thereof, and belongs to the technical field of daily chemicals. In order to solve the problem that the existing solid shampoo soap is insufficient in cleaning component stimulation and softening effect, the shampoo soap takes a composite plant fermentation extract as a core, is matched with a red clover extract and a dendrobium extract, and is supplemented with components such as an amino acid surfactant and a humectant. The compound plant fermentation extract is prepared by mixing camellia seeds, polygonum cuspidatum roots, cacumen biotae and saussurea involucrata according to a specific ratio and performing anaerobic fermentation through compound strains, and can release natural small molecular active ingredients. During preparation, raw material mixing, homogenizing, curing and post-curing process forming are carried out, the product is mild and clean, hair cuticles and scalp barriers are not damaged, the water content of hair can be increased, the combing difficulty is lowered, branching is reduced, and the advantages of portability and environmental protection are achieved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of daily chemicals, and relates to a solid shampoo soap for improving hair smoothness and a preparation method thereof. BACKGROUND

[0002] The solid shampoo soap has become a popular product in the field of daily chemicals due to the advantages of portability, environmental protection (no plastic packaging), strong cleaning power and the like. However, the existing mainstream shampoo soap has the following core technical defects, which affect the use experience and hair health: 1. Cleaning ingredients stimulate and damage hair scales and scalp barrier: The traditional solid shampoo soap mainly uses sodium / potassium fatty acid (soap base) as the core cleaning ingredient, which is prepared by saponification reaction (such as tallow, palm oil and sodium hydroxide saponification). The pH value of the soap base is as high as 9-11, which is much higher than the normal pH value of the scalp (5.5-6.0), and long-term use will damage the scalp keratin layer barrier, leading to water loss of the scalp; at the same time, the soap base has too strong cleaning power, which will excessively strip the natural oil (sebum film) on the hair scale, leading to the upturning and damage of the hair scale, the loss of smooth protection of the hair, and the occurrence of problems such as dryness, splitting and knotting.

[0003] 2. Lack of softening ingredients, and insufficient hair care effect: Most of the existing solid shampoo soaps only focus on the cleaning function, and do not add effective softening and moisturizing ingredients; some products add silicone oil softening agent, but the silicone oil is difficult to uniformly disperse in the solid base, and is easy to remain on the scalp, and long-term use may block the hair follicles, causing dandruff and itching; the silicone oil-free products have more prominent dryness problem due to the lack of alternative hair care ingredients.

[0004] In order to solve the above problems, the industry tries to develop mild solid shampoo soap, but the existing technology still has the following significant deficiencies: some products use amino acid surfactant to replace the soap base, but the single amino acid surfactant has poor foaming property and high cost, and lacks hair care active ingredients, so the softening effect is limited; a few products add plant extracts (such as ginger and aloe vera), but most of them directly add untreated extracts containing impurities such as crude fibers and tannins, which not only cannot improve the softness, but also may aggravate the dryness of the hair.

[0005] Therefore, it is a technical problem to be solved in the current field of daily chemicals to develop a solid shampoo soap which is mild and clean, has no dryness, can improve the softness of hair, is friendly to the scalp and has excellent stability. SUMMARY

[0006] The present application belongs to the technical field of daily chemicals, and relates to a solid shampoo soap for improving hair smoothness and a preparation method thereof.

[0007] The object of the present application can be achieved by the following technical solutions: A solid shampoo bar for improving hair smoothness, containing the following components by weight: 40-60 parts of compound plant fermented extract, 10-20 parts of red clover extract, and 5-15 parts of dendrobium extract; The compound plant fermentation extract is obtained by grinding camellia seeds, Japanese knotweed root, arborvitae leaves, and snow lotus into powder and then fermenting them with compound microbial strains. The mass ratio of camellia seeds, Japanese knotweed root, arborvitae leaves, and snow lotus is 3-5:2-4:1-3:1-2.

[0008] In a preferred embodiment of the present invention, the composite microbial strain is composed of *Lactobacillus plantarum* bacterial suspension and *Saccharomyces cerevisiae* bacterial suspension in a mass ratio of 2-4:1-3, wherein the concentration of *Lactobacillus plantarum* bacterial suspension is 1.0 × 10⁻⁶. 9 CFU / mL, the concentration of Saccharomyces cerevisiae in the culture was 7.0 × 10⁻⁶. 8 CFU / mL.

[0009] As a preferred embodiment of the present invention, the mass ratio of camellia seeds, Japanese knotweed root, arborvitae leaves, and snow lotus is 4:3:2:1.5.

[0010] As a preferred embodiment of the present invention, the red clover extract is a water-purified extract with a mass fraction of 50%. The Dendrobium extract is a purified extract of ethanol and water with a mass fraction of 40% and a volume ratio of 1:1.

[0011] As a preferred embodiment of the present invention, the preparation steps of the compound plant fermentation extract include: W1. Dry the camellia seeds, Japanese knotweed root, arborvitae leaves and snow lotus separately until the moisture content is less than or equal to 8%, grind them through an 80-100 mesh sieve, and mix them in a mass ratio of 3-5:2-4:1-3:1-2 to obtain mixed plant powder; W2. Mix the mixed plant powder with deionized water at a mass ratio of 1:5-8, adjust the pH to 6.0-6.5, and add compound microbial inoculants at a mass ratio of 3%-5% of the mixed plant powder. W3. Anaerobic fermentation at 30-35℃ for 48-72 hours, with stirring once every 12 hours during the process; W4. The fermented material is sterilized at 80-85℃ for 20-30 minutes, centrifuged at 3000-4000rpm for 15-20 minutes, and the supernatant is collected. The supernatant is filtered through a 0.22μm filter membrane to obtain a compound plant fermentation extract.

[0012] As a preferred embodiment of the present invention, it further includes 0.5-1.5 parts by weight of vitamin E and 0.1-0.3 parts by weight of natural flavoring; The natural fragrance is one or a blend of lemon essential oil and lavender essential oil.

[0013] As a preferred embodiment of the present invention, the solid shampoo bar further comprises 20-30 parts of potassium cocoyl glycinate, 10-15 parts of sodium lauroyl glutamate, 8-12 parts of glycerin, 5-8 parts of sorbitol, 6-10 parts of stearic acid, and 4-7 parts of palmitic acid.

[0014] A method for preparing a solid shampoo bar that improves hair smoothness as described above includes the following steps: W1. Prepare and concentrate the compound plant fermentation extract according to the above method; W2. Mix potassium cocoyl glycinate, sodium lauroyl glutamate, stearic acid, and palmitic acid, then add compound plant fermentation extract, red clover extract, and dendrobium extract, and stir well; W3. Add glycerin, sorbitol, vitamin E, and natural flavoring, and stir homogenize at 50-55℃ to obtain a mixture; W4. Pour the mixture into a mold, solidify, and then cure for 7 days to obtain solid shampoo soap.

[0015] As a preferred technical solution of the present invention, the curing in step W4 refers to curing for 24 hours at 25°C and 50% relative humidity.

[0016] As a preferred technical solution of the present invention, after use, the hair moisture content increases by more than 25%, the combing force decreases by more than 30%, and the split ends are reduced by more than 40%.

[0017] The beneficial effects of this invention are: (1) The natural small molecule saponins in the compound plant fermentation extract, together with potassium cocoyl glycinate and sodium lauroyl glutamate, form a “gentle cleansing network” that ensures that the cleansing power removes excess oil without damaging the cuticle sebum film and avoids excessive degreasing.

[0018] (2) The fermentation of compound microorganisms significantly improves the release rate of plant active ingredients, and small molecule components are easily absorbed by the hair scales, resulting in a better smoothing effect. Detailed Implementation

[0019] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with embodiments, is provided below.

[0020] Example 1 1. Preparation and concentration of compound plant fermentation extracts Raw material pretreatment: Accurately weigh 400.0g of camellia seeds (accuracy ±0.1g), 300.0g of Polygonum cuspidatum root, 200.0g of Platycladus orientalis leaves, and 150.0g of Saussurea involucrata. Spread them evenly on stainless steel trays (each layer 2cm thick) and place them in a 62℃ forced-air drying oven for 8 hours. Turn the raw materials over every 2 hours to ensure uniform drying. After drying, the moisture content of the camellia seeds was 7.5%, the Polygonum cuspidatum root 7.2%, the Platycladus orientalis leaves 7.0%, and the Saussurea involucrata 6.8%. Put the dried raw materials into an ultra-fine pulverizer and set the pulverizing time to 3 minutes. After pulverizing, pass the powder through a 90-mesh stainless steel sieve (manual vibrating sieve for 8 minutes, sieving rate 96%). Mix the sieved raw materials according to the ratio and mix them in a three-dimensional mixer for 10 minutes (speed 20 rpm) to obtain 1050.0g of mixed plant powder, which is sealed and stored in a desiccator for later use.

[0021] Fermentation system construction: 1050.0g of mixed plant powder was added to a 5L three-necked flask, along with 6300.0g of deionized water. A magnetic stirrer was turned on at 150rpm and stirred for 10 minutes until the material was evenly dispersed. The pH was adjusted to 6.2 with 0.1mol / L citric acid solution. 42.0g of the compound microbial culture was accurately weighed, including 25.2g of *Lactobacillus plantarum* (MICROBIOLOGICS® KWIK-STIK 2PK-01144P) bacterial suspension (concentration 1.2×10⁻⁶). 9 CFU / mL (verified by plate count), 16.8g of *Saccharomyces cerevisiae* (CICC®1389) culture (concentration 8.0×10⁻⁶ CFU / mL, verified by plate count method), 8 (CFU / mL, as verified above) is slowly added to a three-necked flask, and stirring is continued for 5 minutes to ensure that the inoculum is evenly dispersed.

[0022] Anaerobic fermentation: Seal a three-necked flask with a silicone stopper (leaving one Φ1mm vent hole), place it in a 32℃ constant temperature water bath anaerobic fermentation chamber, and purge the air in the chamber with nitrogen three times (10 minutes of aeration followed by 5 minutes of venting each time) to maintain an anaerobic environment; ferment for 60 hours, during which time turn on the magnetic stirrer every 12 hours at 100 rpm for 5 minutes, and close the vent hole after stirring; take a 5mL sample daily during the fermentation process to measure the pH value (maintaining it between 5.8 and 6.0) to ensure normal fermentation.

[0023] Post-processing and concentration: After fermentation, the three-necked flask was transferred to an 82°C constant temperature water bath. A thermometer was inserted to monitor the material temperature. After the temperature reached 82°C, it was kept at this temperature for 25 minutes for sterilization. After sterilization, the three-necked flask was removed and allowed to cool to 25°C at room temperature (approximately 2 hours). The material was then transferred to a high-speed centrifuge, set to 3500 rpm, and centrifuged for 18 minutes. After centrifugation, the upper clear liquid (approximately 4800 mL) was aspirated with a pipette, avoiding the aspiration of the lower precipitate (approximately 200 mL). The supernatant was then filtered through a 0.22 μm PES filter membrane under vacuum (vacuum degree -0.08 MPa), and 4650 mL of filtrate was collected. The filtrate was transferred to a rotary evaporator, set to a water bath temperature of 60°C and a vacuum degree of -0.09 MPa, and concentrated under reduced pressure. The solid content was measured every 30 minutes. When the solid content reached 20.5%, the concentration was stopped, yielding 850.0 g of the compound plant fermentation extract, which was sealed and stored at 4°C for later use.

[0024] 2. Preparation of solid shampoo bars Raw material pretreatment: Raw materials: Weigh out 250.0g of potassium cocoyl glycinate, 120.0g of sodium lauroyl glutamate, 80.0g of stearic acid, and 50.0g of palmitic acid. Put them into a universal grinder and grind for 2 minutes. Then pass them through a 60-mesh sieve (vibrate sieve for 8 minutes, passing rate 98%). Place the ground raw materials into a desiccator (silica gel desiccant) and equilibrate for 24 hours (humidity 25%). Excipients: Weigh 100.0g of glycerin, 60.0g of sorbitol, 10.0g of vitamin E, and 2.0g of lemon essential oil, add them to a 500mL beaker, turn on the magnetic stirrer, and stir at 200rpm for 10 minutes until completely mixed and without separation, to obtain 172.0g of liquid excipient mixture, for later use.

[0025] Main mixing: After cleaning and drying the mixing tank of the double planetary mixer, add all the above raw materials, set the mixing speed to 300 rpm, and mix at room temperature for 10 minutes; during the mixing, turn on the wall scraper every 2 minutes at a speed of 50 rpm to prevent the materials from sticking to the wall; after 10 minutes, turn off the mixer and slowly add 200.0g of compound plant fermentation extract, 70.0g of red clover extract (Shanxi Nuosai Biotechnology Co., Ltd., NS-078), and 50.0g of dendrobium extract (Shanxi Fenhai Biotechnology Co., Ltd., FHSW-057), in 3 portions, mixing for 5 minutes after each addition; after all materials have been added, set the mixing speed to 400 rpm and continue mixing for 20 minutes; after mixing, take samples from 3 different parts (upper, middle, and lower) and observe under a microscope at 100x magnification. No obvious agglomerated particles were observed, indicating that the mixture was uniform.

[0026] Additives and homogenization: Add 172.0g of the additive mixture to the mixing tank, turn on the heating device, and raise the material temperature to 52℃; set the stirring speed to 500rpm and stir for 30 minutes; measure the material temperature every 5 minutes during stirring and maintain it at 51-53℃; after stirring, transfer the material to a high-pressure homogenizer, set the homogenization pressure to 22MPa, and homogenize twice, 5 minutes each time; turn on the cooling system during homogenization to ensure the material temperature is ≤55℃; after homogenization, take a sample for observation. The material is a transparent and uniform liquid with no obvious bubbles, and is ready for use.

[0027] Molding: Place the custom silicone soap mold (60g capacity per mold, 11 cavities in total) in a 40℃ constant temperature oven and preheat for 30 minutes; remove and wipe the inner wall of the mold cavity with anhydrous ethanol cotton balls and let it dry; quickly pour the homogenized material into the soap mold, 57g into each cavity, leaving 3g for expansion space; after pouring, gently shake the soap mold with an amplitude of 5mm and a frequency of 2 times / second for 10 seconds to remove air bubbles; place the soap mold at room temperature (25℃) for 2 hours until the material initially solidifies, and the surface has slight elasticity when pressed without indentation; transfer the soap mold to a constant temperature and humidity chamber at 25℃ and 50% humidity for 24 hours to cure; observe every 6 hours during the curing period, and check for delamination and cracking.

[0028] Post-curing and packaging: After curing, remove the soap mold, gently pry open the edge of the mold cavity to release the soap body; check the appearance of the soap body, ensuring there are no missing corners, bubbles, or cracks; place the soap bodies in a single layer on a stainless steel mesh rack with a spacing of 3cm, and place them in a ventilated drying room at 23℃, 50% humidity, and an air flow rate of 0.5m / s for post-curing for 7 days; record the temperature and humidity daily during post-curing, and turn the soap body over once every 24 hours; after 7 days, the moisture content of the soap body drops to 12%, and the hardness is 72 Shore A; package it with biodegradable kraft paper to obtain the finished solid shampoo soap.

[0029] Example 2 1. Preparation and concentration of compound plant fermentation extracts Raw material pretreatment: Weigh 300.0g of camellia seeds, 400.0g of Japanese knotweed root, 100.0g of arborvitae leaves, and 200.0g of snow lotus. Dry them in a forced-air oven at 60℃ for 9 hours (each layer is 2.5cm thick, and the layers are turned over every 2 hours). The moisture content after drying is 7.8%, 7.5%, 7.2%, and 7.0%, respectively. After ultra-fine grinding, the powder is passed through an 80-mesh sieve (vibrating sieve for 10 minutes, with a sieve pass rate of 97%). The powder is then mixed in a three-dimensional mixer for 10 minutes to obtain 1000.0g of mixed plant powder.

[0030] Fermentation system construction: Mixed plant powder + 5000.0g deionized water, pH adjusted to 6.0; add 30.0g of compound bacteria (18.0g of Lactobacillus plantarum + 12.0g of Saccharomyces cerevisiae), stir at 150rpm for 5 minutes.

[0031] Anaerobic fermentation: Ferment in an anaerobic fermentation chamber at 30℃ for 72 hours, stirring at 100 rpm for 5 minutes every 12 hours, and maintaining the pH at 5.7-5.9 during the fermentation process.

[0032] Post-processing and concentration: Sterilize at 80℃ for 30 minutes, centrifuge at 3000rpm for 20 minutes, and take 4600mL of supernatant; filter through a 0.22μm filter membrane, and concentrate by rotary evaporation at 60℃ and -0.09MPa to a solid content of 20.2%, yielding 780.0g of compound plant fermentation extract.

[0033] 2. Preparation of solid shampoo bars Formula: 150.0g of compound plant fermentation extract, 200.0g of potassium cocoyl glycinate, 100.0g of sodium lauroyl glutamate, 50.0g of red clover extract, 30.0g of dendrobium extract, 80.0g of glycerin, 50.0g of sorbitol, 60.0g of stearic acid, 40.0g of palmitic acid, 5.0g of vitamin E, and 1.0g of lavender essential oil.

[0034] Preparation process: The raw materials were crushed and passed through a 60-mesh sieve (97% sieve pass rate), and the auxiliary materials were mixed and stirred at 200 rpm for 10 minutes. Main mixing: Stir the raw materials at 300 rpm for 10 minutes, add the extract and stir at 400 rpm for 20 minutes. Microscopic observation showed no agglomerated particles. Additives: Heat to 50℃, stir at 500 rpm for 30 minutes, and homogenize twice at 20 MPa; Molding: Preheat soap mold to 40℃, pour in material (57g / mold), let stand at 25℃ for 2 hours, and cure at 25℃ and 50% humidity for 24 hours; Post-curing: 7 days of ventilation drying at 22℃ and 48% humidity, resulting in a finished product hardness of 68 Shore A.

[0035] Example 3 1. Preparation and concentration of compound plant fermentation extracts Raw material pretreatment: Weigh 500.0g of camellia seeds, 200.0g of Japanese knotweed root, 300.0g of arborvitae leaves, and 100.0g of snow lotus. Dry them in a forced-air oven at 65℃ for 7 hours (each layer is 1.5cm thick, and they are turned over every 1.5 hours). The moisture content after drying is 7.0%, 6.8%, 6.5%, and 6.2%, respectively. After ultra-fine grinding, pass the powder through a 100-mesh sieve (vibrate sieve for 12 minutes, sieve pass rate 95%), and mix it in a three-dimensional mixer for 10 minutes to obtain 1100.0g of mixed plant powder.

[0036] Fermentation system construction: Mixed plant powder + 8800.0g deionized water, pH adjusted to 6.5; add 55.0g of compound bacteria (33.0g of Lactobacillus plantarum + 22.0g of Saccharomyces cerevisiae), stir at 150rpm for 5 minutes.

[0037] Anaerobic fermentation: Ferment at 35℃ in an anaerobic fermentation chamber for 48 hours, stirring at 100 rpm for 5 minutes every 12 hours, and maintaining the pH at 5.9-6.1 during the fermentation process.

[0038] Post-processing and concentration: Sterilize at 85℃ for 20 minutes, centrifuge at 4000rpm for 15 minutes, and take 8500mL of supernatant; filter through a 0.22μm filter membrane, and concentrate by rotary evaporation at 60℃ and -0.09MPa to a solid content of 20.8%, yielding 920.0g of compound plant fermentation extract.

[0039] 2. Preparation of solid shampoo bars Formula: 250.0g of compound plant fermentation extract, 300.0g of potassium cocoyl glycinate, 150.0g of sodium lauroyl glutamate, 100.0g of red clover extract, 80.0g of dendrobium extract, 120.0g of glycerin, 80.0g of sorbitol, 100.0g of stearic acid, 70.0g of palmitic acid, 15.0g of vitamin E, and 3.0g of lemon and lavender essential oils (in a 1:1 ratio).

[0040] Preparation process: The raw materials were crushed and passed through a 60-mesh sieve (96% passing rate), and the auxiliary materials were mixed and stirred at 200 rpm for 10 minutes. Main mixing: Stir the raw materials at 300 rpm for 10 minutes, add the extract and stir at 400 rpm for 20 minutes. Microscopic observation showed no agglomerated particles. Additives: Heat to 55℃, stir at 500 rpm for 30 minutes, and homogenize twice at 25 MPa; Molding: Preheat soap mold to 40℃, pour in material (57g / mold), let stand at 25℃ for 2 hours, and cure at 25℃ and 50% humidity for 24 hours; Post-curing: 24℃, 52% humidity, and ventilated drying for 7 days, resulting in a finished product hardness of 75 Shore A.

[0041] Comparative Example 1 Camellia seeds were missing from the raw materials of the compound plant fermentation extract. The mass ratio of the other three plants was adjusted to 700g of Polygonum cuspidatum root, 200g of Platycladus orientalis leaf, and 150g of Saussurea involucrata. The remaining components and preparation steps were as described in Example 1.

[0042] Comparative Example 2 The compound bacterial strain was replaced with a single Lactobacillus plantarum strain (42g, concentration 1.2×10⁻⁶). 9 (CFU / mL), the remaining components and preparation steps are as described in Example 1.

[0043] Comparative Example 3 The composition does not contain any compound plant fermentation extracts, which are replaced with an equal mass of deionized water. The remaining components and preparation steps are the same as in Example 1.

[0044] Comparative Example 4 Red clover extract was missing and replaced with an equal mass of dendrobium extract. The remaining components and preparation steps are the same as in Example 1.

[0045] Comparative Example 5 Replace the arborvitae leaves with ginkgo leaves. The raw materials are 400g of camellia seeds, 300g of Japanese knotweed root, 200g of ginkgo leaves, and 150g of snow lotus. The remaining components and preparation steps are the same as in Example 1.

[0046] Comparative Example 6 The compound microbial strain was replaced with a single brewer's yeast (42g, concentration 8.0×10). 8 (CFU / mL), the remaining components and preparation steps are as described in Example 1.

[0047] Comparative Example 7 Lacking snow lotus, the raw materials are 400g of camellia seeds, 300g of Japanese knotweed root, and 350g of arborvitae leaves. The remaining components and preparation steps are the same as in Example 1.

[0048] Comparative Example 8 Since Dendrobium extract was missing, it was replaced with an equal mass of red clover extract. The remaining components and preparation steps were as described in Example 1.

[0049] Performance testing 1. Hair moisture content (%) test Using a moisture analyzer, healthy human hair (15cm in length, 50-60μm in diameter) was selected, cut into 1cm segments, and equilibrated for 24 hours (25℃, 50% humidity). The moisture content before use was measured. Then, the hair was soaked in a 1% sample aqueous solution for 30 minutes (25℃, stirring speed 50rpm). After removal, the surface moisture was blotted with filter paper, and the moisture content after use was measured immediately. The improvement rate was calculated as (after use - before use) / before use × 100%. Five parallel measurements were performed, and the average value was taken.

[0050] 2. Hair smoothness (combing power N) Using a tension meter, a 10cm long hair bundle (containing 50 hairs, weighing 0.05g) was fixed to the lower clamp of the tension meter, and a comb (2mm tooth pitch, plastic material) was connected to the upper clamp. The tension meter was set to descend at a speed of 1cm / s, and the maximum tension (combing force) of the comb through the hair bundle was recorded. The combing force was measured before and after use (using the same hair moisture content treatment method), and the reduction rate was calculated as (before use - after use) / before use × 100%. Five parallel measurements were performed, and the average value was taken.

[0051] 3. Forking reduction rate (%) Ten hairs, each 15cm long, were selected (same as the hair moisture content experiment). The number of splits in each hair was counted under a microscope (splits ≥0.5mm in length were considered valid splits). The total number of splits before use was obtained. After treatment with the hair moisture content treatment method, the total number of splits after use was counted in the same way. The reduction rate was calculated as (before use - after use) / before use × 100%. Three parallel tests were conducted (10 hairs in each group), and the average value was taken.

[0052] 4. Smoothness rating (1-5 points) One hundred volunteers (50 men and 50 women, aged 25-45, all with dry and frizzy hair, and ≥3 split ends per 10cm) were recruited. Each volunteer used the sample shampoo bar to clean their hair once (following the standard shampooing process: 3 minutes of rubbing and 5 minutes of rinsing). After cleaning, the hair was air-dried, and sensory evaluations were conducted after 2 hours: 1 point (extremely dry, noticeably tangled when combing, requiring forceful pulling), 2 points (dry, slightly tangled when combing, requiring moderate force), 3 points (normal, combable but not smooth), 4 points (smooth, combable with a slight silky feel), and 5 points (extremely smooth, no resistance when combing, noticeably silky). The average score of the 100 volunteers was taken and rounded to one decimal place.

[0053] The test results are recorded in Table 1.

[0054] Table 1

[0055] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A solid shampoo bar for improving hair smoothness, characterized in that, By weight, it contains the following components: 40-60 parts of compound plant fermentation extract, 10-20 parts of red clover extract, and 5-15 parts of dendrobium extract; The compound plant fermentation extract is obtained by grinding camellia seeds, Japanese knotweed root, arborvitae leaves, and snow lotus into powder and then fermenting them with compound microbial strains. The mass ratio of camellia seeds, Japanese knotweed root, arborvitae leaves, and snow lotus is 3-5:2-4:1-3:1-2.

2. The solid shampoo bar according to claim 1, characterized in that, The compound microbial strain consists of *Lactobacillus plantarum* bacterial suspension and *Saccharomyces cerevisiae* bacterial suspension in a mass ratio of 2-4:1-3, wherein the concentration of *Lactobacillus plantarum* bacterial suspension is 1.0 × 10⁻⁶. 9 CFU / mL, the concentration of Saccharomyces cerevisiae in the culture was 7.0 × 10⁻⁶. 8 CFU / mL.

3. The solid shampoo bar according to claim 1, characterized in that, The mass ratio of camellia seeds, Japanese knotweed root, arborvitae leaves, and snow lotus is 4:3:2:1.

5.

4. The solid shampoo bar according to claim 1, characterized in that, The red clover extract is a water-purified extract with a mass fraction of 50%. The Dendrobium extract is a purified extract of ethanol and water with a mass fraction of 40% and a volume ratio of 1:

1.

5. The solid shampoo bar according to claim 1, characterized in that, The preparation steps of the compound plant fermentation extract include: W1. Dry the camellia seeds, Japanese knotweed root, arborvitae leaves and snow lotus separately until the moisture content is less than or equal to 8%, grind them through an 80-100 mesh sieve, and mix them in a mass ratio of 3-5:2-4:1-3:1-2 to obtain mixed plant powder; W2. Mix the mixed plant powder with deionized water at a mass ratio of 1:5-8, adjust the pH to 6.0-6.5, and add compound microbial inoculants at a mass ratio of 3%-5% of the mixed plant powder. W3. Anaerobic fermentation at 30-35℃ for 48-72 hours, with stirring once every 12 hours during the process; W4. The fermented material is sterilized at 80-85℃ for 20-30 minutes, centrifuged at 3000-4000rpm for 15-20 minutes, and the supernatant is collected. The supernatant is filtered through a 0.22μm filter membrane to obtain a compound plant fermentation extract.

6. The solid shampoo bar according to claim 1, characterized in that, It also includes 0.5-1.5 parts by weight of vitamin E and 0.1-0.3 parts by weight of natural flavoring; The natural fragrance is one or a blend of lemon essential oil and lavender essential oil.

7. The solid shampoo bar according to claim 1, characterized in that, The solid shampoo bar also contains 20-30 parts of potassium cocoyl glycinate, 10-15 parts of sodium lauroyl glutamate, 8-12 parts of glycerin, 5-8 parts of sorbitol, 6-10 parts of stearic acid, and 4-7 parts of palmitic acid.

8. A method for preparing a solid shampoo bar for improving hair smoothness as described in any one of claims 1-7, characterized in that, Includes the following steps: W1. Prepare and concentrate the compound plant fermentation extract according to the above method; W2. Mix potassium cocoyl glycinate, sodium lauroyl glutamate, stearic acid, and palmitic acid, then add compound plant fermentation extract, red clover extract, and dendrobium extract, and stir well; W3. Add glycerin, sorbitol, vitamin E, and natural flavoring, and stir homogenize at 50-55℃ to obtain a mixture; W4. Pour the mixture into a mold, solidify, and then cure for 7 days to obtain solid shampoo soap.

9. The solid shampoo bar according to claim 8, characterized in that, The curing described in step W4 refers to curing at 25°C and 50% relative humidity for 24 hours.

10. The solid shampoo bar according to any one of claims 1-7, characterized in that, After use, hair moisture content increases by ≥25%, combing power decreases by ≥30%, and split ends are reduced by ≥40%.

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