Natural plant extract hair loss preventing and dry hair repairing shampoo and preparation method thereof

Abstract

The invention discloses a natural plant-extracted anti-hair-loss dry hair repair shampoo and a preparation method, and relates to the technical field of daily chemical wash supplies, the shampoo contains 4-8% of a natural plant-extracted anti-hair-loss composite extract, 2-5% of dry hair repair active ingredients, a mild cleaning surfactant and the like, and the balance of deionized water, totaling 100%; the natural plant-extracted anti-hair-loss composite extract is prepared by compounding a cacumen biotae extract, a ginger extract, a polygonum multiflorum extract, a rosemary extract and a panthenol extract, and the dry hair repair active component contains hydrolyzed keratin and the like; the preparation method comprises the steps of raw material pretreatment, water phase preparation, active phase mixing, system adjustment, constant volume homogenization, detection and filling, the homogenization pressure is 20-25 MPa, and each parameter is strictly controlled. The anti-hair-loss shampoo is obvious in anti-hair-loss effect, outstanding in dry hair repairing capacity, mild and free of irritation to scalp; the hair conditioner is stable in system, easy to blister, comfortable and safe to use, capable of improving the problems of alopecia and dryness and suitable for long-term use of various hair qualities.

Description

Technical Field

[0001] This invention relates to the field of daily chemical personal care products, and in particular to a natural plant extract anti-hair loss and dry hair repair shampoo and its preparation method. Background Technology

[0002] With the fast pace of life, irregular schedules, and environmental factors, problems such as hair loss, dry and frizzy hair, and sensitive scalp are becoming increasingly common. Consumers' demands for shampoo have evolved from basic cleaning to a multi-functional combination of "anti-hair loss + repair + gentleness." Currently, most anti-hair loss shampoos on the market rely primarily on chemical anti-hair loss ingredients. While they can provide some short-term protection, long-term use can irritate the scalp, damage the scalp barrier, and fail to address dry hair repair needs. Hair may still experience dryness, split ends, and frizz after use, failing to meet the core repair needs of those with dry hair.

[0003] While some existing patents exist for shampoos targeting hair loss prevention or dry hair repair, significant shortcomings remain, hindering the synergistic effect of both. For example, patent application CN116239871A, titled "A Natural Plant Extract Anti-Hair Loss Shampoo and its Preparation Method," mentions using plant extracts such as arborvitae leaves and ginger as anti-hair loss ingredients to enhance the effect, while employing mild surfactants to reduce scalp irritation. However, this patent lacks a repair system specifically designed for dry hair sufferers, lacking targeted active ingredients for dry hair repair. It fails to address the pain points of dry, frizzy, and brittle hair, and the compounding ratio of plant extracts is not optimized, resulting in limited anti-hair loss effects and difficulty in achieving long-lasting anti-hair loss.

[0004] The patent application document with patent publication number CN115845783B and patent name "A Dry Hair Repair Shampoo and Its Preparation Method" mentions adding repairing ingredients such as hydrolyzed keratin and ceramides to improve the dryness of hair and enhance its smoothness. However, the patent does not involve anti-hair loss function, which cannot meet the needs of consumers who have both hair loss and dry hair problems. Moreover, its compound system of cleansing surfactants is not mild enough, and long-term use may still irritate the scalp, leading to scalp sensitivity and itching. At the same time, it lacks scalp soothing ingredients and cannot relieve scalp discomfort, thus limiting the target population.

[0005] In summary, existing shampoos either focus solely on anti-hair loss while lacking dry hair repair capabilities, or they focus only on dry hair repair without anti-hair loss effects, making it difficult to achieve a synergistic improvement in both. Furthermore, some products suffer from issues such as unreasonable formulation of plant extracts, insufficient gentleness of surfactants, and poor scalp soothing effects, failing to address multiple needs including anti-hair loss, dry hair repair, gentle soothing, and environmental safety. Therefore, developing a shampoo and its preparation method that combines natural plant extracts for anti-hair loss, dry hair repair, and gentle soothing properties, while also being scientifically formulated, safe, and environmentally friendly, is crucial for addressing current industry pain points and meeting diverse consumer needs. Summary of the Invention

[0006] The present invention proposes a natural plant extract anti-hair loss and dry hair repair shampoo and its preparation method to solve the problems mentioned in the prior art.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a natural plant extract anti-hair loss and dry hair repair shampoo, which, by mass percentage, is composed of the following components: 4-8% natural plant extract anti-hair loss compound extract, 2-5% dry hair repair active ingredients, 12-20% mild cleansing surfactant, 3-6% moisturizing film-forming agent, 1-3% scalp soothing agent, 0.1-0.5% pH adjuster, 0.3-0.8% thickener, 0.2-0.6% preservative, 0.1-0.4% fragrance, and deionized water to make up to 100%.

[0008] Furthermore, the natural plant extract anti-hair loss compound extract is composed of arborvitae leaf extract, ginger extract, Polygonum multiflorum extract, rosemary extract, and panthenol extract in a mass ratio of 3:2:2:1:1; the total polyphenol content of the extract is ≥1.5%, the total flavonoid content is ≥1.2%, the extraction solvent is a mixture of food-grade ethanol and deionized water, and the water content of the extract is ≤5%.

[0009] Furthermore, the dry hair repair active ingredient is composed of hydrolyzed keratin, amino acid complex, phytosterol ester, and ceramide 3 in a mass ratio of 4:3:2:1; the hydrolyzed keratin has a molecular weight of 5000-8000 Da, the amino acid complex contains leucine, serine, and arginine, the phytosterol ester has a purity of ≥98%, and the ceramide 3 is extracted from plants with a purity of ≥95%.

[0010] Furthermore, the mild cleaning surfactant is compounded from potassium cocoyl glycinate, sodium lauroyl sarcosinate, and decyl glucoside in a mass ratio of 2:2:1; the active ingredient content of potassium cocoyl glycinate is ≥90%, the active ingredient content of sodium lauroyl sarcosinate is ≥95%, the purity of decyl glucoside is ≥98%, the foaming power of the surfactant system is ≥180mm, and the detergency is ≥90%.

[0011] Furthermore, the moisturizing film-forming agent is composed of sodium hyaluronate, polyquaternium-73, and hydrolyzed tremella polysaccharide in a mass ratio of 1:3:2; the molecular weight of sodium hyaluronate is 100-200kDa, the solid content of polyquaternium-73 is ≥30%, and the purity of hydrolyzed tremella polysaccharide is ≥90%; the scalp soothing agent is compounded from purslane extract, calendula extract, and allantoin in a mass ratio of 2:2:1, and the purity of allantoin is ≥99%.

[0012] Furthermore, the thickener is a compound of xanthan gum and hydroxyethyl cellulose in a mass ratio of 1:1, the viscosity of xanthan gum is ≥1500 cP, and the viscosity of hydroxyethyl cellulose is ≥20000 cP; the pH adjuster is citric acid or sodium citrate; the preservative is a compound of phenoxyethanol and ethylhexylglycerin in a mass ratio of 4:1; and the fragrance is a compound fragrance of natural plant essential oils.

[0013] Furthermore, the preparation method of the natural plant extract anti-hair loss and dry hair repair shampoo includes the following steps: S1: Raw material pretreatment: Dilute the natural plant extract anti-hair loss compound extract, dry hair repair active ingredients, and scalp soothing agent with 5 times their mass of deionized water, and stir until completely dissolved to obtain plant extract diluent, repair diluent, and soothing diluent; disperse the thickener with 10 times its mass of deionized water, and let it stand until there are no particles to obtain thickener dispersion, for later use.

[0014] S2: Aqueous phase preparation: Add 80% of the formula amount of deionized water to the reactor, heat to 75-80℃, add mild cleaning surfactant and thickener dispersion, stir at a rate of 300-400 rpm for 20-30 minutes until the material is completely dissolved and the system is homogeneous and transparent to obtain the aqueous phase.

[0015] S3: Active phase mixing: Cool the aqueous phase to 40-45℃, and add the plant extract diluent, repair diluent, soothing diluent, and moisturizing film-forming agent in sequence. Stir at a speed of 200-300 rpm for 15-20 minutes, and control the system temperature to not exceed 45℃ during the stirring process to obtain the active mixed phase.

[0016] S4: System Adjustment: Add pH adjuster to the active mixed phase and stir slowly for 5-10 minutes to adjust the pH value of the system to 5.5-6.5; then add preservative and fragrance, and stir at a rate of 150-200 rpm for 8-12 minutes to ensure that the components are fully mixed.

[0017] S5: Volume homogenization: Add the remaining deionized water to the system to make up to 100%, stir evenly, and then send the system into a high-pressure homogenizer. Homogenize 2-3 times under a pressure of 20-25MPa, each time for 3-5 minutes, to make the system have uniform particle size and no agglomerated particles.

[0018] S6: Testing and Filling: The homogenized shampoo is subjected to performance testing. After passing the test, it is filtered through a 100-mesh filter cloth and filled using aseptic filling equipment to obtain the finished natural plant extract anti-hair loss and dry hair repair shampoo.

[0019] Furthermore, in S1, the stirring rate of the raw material pretreatment is 150-200 revolutions per minute, the stirring time is 10-15 minutes, and the dilution and dispersion processes are carried out in a constant temperature environment of 30-35℃. After the thickener is dispersed, it needs to be filtered through an 80-mesh filter cloth to remove undispersed coarse particles.

[0020] Furthermore, the reactor in S2 is made of 304 stainless steel with a polished inner wall and a roughness Ra≤0.8μm. The agitator is an anchor-type agitator, and nitrogen gas is continuously purged during the stirring process to prevent oxidation of the raw materials. The viscosity of the aqueous phase is controlled at 500-800 cP, with no wall adhesion or sedimentation.

[0021] Furthermore, the homogenization chamber of the high-pressure homogenizer in S5 is made of ceramic material. During the homogenization process, the system temperature is controlled to not exceed 40℃. After homogenization, the particle size of the system is ≤50μm, and the particle size distribution span is ≤1.2. The performance testing items in S6 include appearance, pH value, viscosity, foaming power, heat resistance stability, and cold resistance stability. The heat resistance stability is 40±2℃ for 24 hours without any abnormalities, and the cold resistance stability is -5±2℃ for 24 hours without any abnormalities.

[0022] Compared with existing technologies, the beneficial effects of this invention are: This invention relates to a natural plant-based anti-hair loss and dry hair repair shampoo and its preparation method, achieving a synergistic improvement in anti-hair loss, dry hair repair, and scalp soothing. Its advantages are significant and comprehensive, effectively solving the core pain point of existing technologies that cannot simultaneously address both anti-hair loss and dry hair repair. Regarding anti-hair loss efficacy, it employs a scientific blend of various natural plant extracts to form a multi-dimensional anti-hair loss system. This system gently nourishes hair follicles, strengthens hair roots, reduces hair loss, and provides a gentle yet long-lasting anti-hair loss effect. It does not rely on chemical anti-hair loss ingredients, avoids scalp irritation, and is suitable for all types of scalp types.

[0023] In terms of dry hair repair, it is specially formulated with targeted active ingredients that can penetrate deep into the hair shaft to replenish the nutrients needed by the hair, repair damaged hair cuticles, and improve problems such as dryness, frizz, split ends, and breakage. It restores dry hair to smoothness, softness, and shine, while forming a moisturizing protective film to reduce moisture loss and lock in hair moisture for a long time. It solves the problem of dry hair from the root and meets the core repair needs of people with dry hair.

[0024] In terms of gentleness and safety, it uses a mild cleansing surfactant complex system, which has sufficient cleansing power yet is gentle and non-irritating. It can effectively clean the scalp and hair of oil without damaging the scalp barrier, making it suitable for people with sensitive scalps. All ingredients are made from natural or environmentally friendly synthetic raw materials, with no irritating or harmful additives. Combined with scalp soothing ingredients, it can relieve scalp sensitivity, itching, and other discomforts, further protecting scalp health and meeting the needs of modern consumers for environmentally friendly and safe hair care products.

[0025] In terms of process and product stability, the preparation method is scientific and the steps are clear. Through precise temperature control, stirring rate adjustment, and high-pressure homogenization, the components are fully mixed and evenly dispersed, avoiding problems such as agglomeration and stratification, thus improving product stability. At the same time, the process parameters are quantifiable and highly repeatable, enabling large-scale production, reducing production costs, and the product has excellent heat and cold resistance and stability, is not easily deteriorated during long-term storage, and has a long service life.

[0026] Furthermore, by further refining the specifications, compounding ratios, and preparation process details of each component, this invention ensures the operability and stability of the technical solution, accurately adapting to the needs of people with different degrees of hair loss and different dry hair conditions. It has broad application prospects in the hair care field, satisfying consumers' dual needs for hair loss prevention and dry hair repair, while providing a gentle, safe, and comfortable hair care experience. Attached Figure Description

[0027] Figure 1 This is a schematic block diagram of the preparation method of the natural plant extract anti-hair loss and dry hair repair shampoo proposed in this invention; Figure 2 A bar chart comparing the anti-hair loss effects of different products; Figure 3 Line graph showing the relationship between the amount of plant extract added and the repair effect. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they may refer to a fixed connection, a detachable connection, or an integral connection; they may refer to a mechanical connection or an electrical connection; they may refer to a direct connection or an indirect connection through an intermediate medium; and they may refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. The invention will now be described in further detail with reference to the accompanying drawings.

[0031] Reference Figures 1 to 3 This is a natural plant-based anti-hair loss and dry hair repair shampoo, composed of the following components by weight percentage: 4-8% natural plant-based anti-hair loss compound extract, 2-5% dry hair repair active ingredients, 12-20% mild cleansing surfactant, 3-6% moisturizing film-forming agent, 1-3% scalp soothing agent, 0.1-0.5% pH adjuster, 0.3-0.8% thickener, 0.2-0.6% preservative, 0.1-0.4% fragrance, and deionized water to make up to 100%; all components are of natural origin or environmentally friendly synthetic raw materials, with no irritating or harmful additives.

[0032] In this invention, the natural plant extract anti-hair loss compound extract is composed of arborvitae leaf extract, ginger extract, Polygonum multiflorum extract, rosemary extract, and panthenol extract in a mass ratio of 3:2:2:1:1; the total polyphenol content of the extract is ≥1.5%, the total flavonoid content is ≥1.2%, the extraction solvent is a mixture of food-grade ethanol and deionized water, and the water content of the extract is ≤5%.

[0033] In this invention, the dry hair repair active ingredient is composed of hydrolyzed keratin, amino acid complex, phytosterol ester, and ceramide 3 in a mass ratio of 4:3:2:1; the hydrolyzed keratin has a molecular weight of 5000-8000 Da, the amino acid complex contains leucine, serine, and arginine, the phytosterol ester has a purity of ≥98%, and the ceramide 3 is extracted from plants with a purity of ≥95%.

[0034] In this invention, the mild cleaning surfactant is composed of potassium cocoyl glycinate, sodium lauroyl sarcosinate, and decyl glucoside in a mass ratio of 2:2:1; the active ingredient content of potassium cocoyl glycinate is ≥90%, the active ingredient content of sodium lauroyl sarcosinate is ≥95%, the purity of decyl glucoside is ≥98%, the foaming power of the surfactant system is ≥180mm, and the detergency is ≥90%.

[0035] In this invention, the moisturizing film-forming agent is composed of sodium hyaluronate, polyquaternium-73, and hydrolyzed tremella polysaccharide in a mass ratio of 1:3:2; the molecular weight of sodium hyaluronate is 100-200kDa, the solid content of polyquaternium-73 is ≥30%, and the purity of hydrolyzed tremella polysaccharide is ≥90%; the scalp soothing agent is composed of purslane extract, calendula extract, and allantoin in a mass ratio of 2:2:1, and the purity of allantoin is ≥99%.

[0036] In this invention, the thickener is a compound of xanthan gum and hydroxyethyl cellulose in a mass ratio of 1:1, the viscosity of xanthan gum is ≥1500 cP, and the viscosity of hydroxyethyl cellulose is ≥20000 cP; the pH adjuster is citric acid or sodium citrate; the preservative is a compound of phenoxyethanol and ethylhexylglycerin in a mass ratio of 4:1; and the fragrance is a compound fragrance of natural plant essential oils.

[0037] This invention includes the following steps: S1: Raw material pretreatment: Dilute the natural plant extract anti-hair loss compound extract, dry hair repair active ingredients, and scalp soothing agent with 5 times their mass of deionized water, and stir until completely dissolved to obtain plant extract diluent, repair diluent, and soothing diluent; disperse the thickener with 10 times its mass of deionized water, and let it stand until there are no particles to obtain thickener dispersion, for later use.

[0038] S2: Aqueous phase preparation: Add 80% of the formula amount of deionized water to the reactor, heat to 75-80℃, add mild cleaning surfactant and thickener dispersion, stir at a rate of 300-400 rpm for 20-30 minutes until the material is completely dissolved and the system is homogeneous and transparent to obtain the aqueous phase.

[0039] S3: Active phase mixing: Cool the aqueous phase to 40-45℃, and add the plant extract diluent, repair diluent, soothing diluent, and moisturizing film-forming agent in sequence. Stir at a speed of 200-300 rpm for 15-20 minutes, and control the system temperature to not exceed 45℃ during the stirring process to obtain the active mixed phase.

[0040] S4: System Adjustment: Add pH adjuster to the active mixed phase and stir slowly for 5-10 minutes to adjust the pH value of the system to 5.5-6.5; then add preservative and fragrance, and stir at a rate of 150-200 rpm for 8-12 minutes to ensure that the components are fully mixed.

[0041] S5: Volume homogenization: Add the remaining deionized water to the system to make up to 100%, stir evenly, and then send the system into a high-pressure homogenizer. Homogenize 2-3 times under a pressure of 20-25MPa, each time for 3-5 minutes, to make the system have uniform particle size and no agglomerated particles.

[0042] S6: Testing and Filling: The homogenized shampoo is subjected to performance testing. After passing the test, it is filtered through a 100-mesh filter cloth and filled using aseptic filling equipment to obtain the finished natural plant extract anti-hair loss and dry hair repair shampoo.

[0043] In this invention, the stirring rate of the raw material pretreatment in S1 is 150-200 revolutions per minute, the stirring time is 10-15 minutes, and the dilution and dispersion processes are carried out in a constant temperature environment of 30-35℃. After the thickener is dispersed, it needs to be filtered through an 80-mesh filter cloth to remove undispersed coarse particles.

[0044] In this invention, the reactor in S2 is made of 304 stainless steel with polished inner wall and roughness Ra≤0.8μm. The stirring paddle is an anchor-type stirring paddle. Nitrogen gas is continuously purged during stirring to prevent oxidation of the raw materials. The viscosity of the aqueous phase is controlled at 500-800 cP, with no wall adhesion or sedimentation.

[0045] In this invention, the homogenization chamber of the high-pressure homogenizer in S5 is made of ceramic material. During the homogenization process, the system temperature is controlled to not exceed 40℃. After homogenization, the particle size of the system is ≤50μm and the particle size distribution span is ≤1.2. The performance testing items in S6 include appearance, pH value, viscosity, foaming power, heat resistance stability, and cold resistance stability. The heat resistance stability is 40±2℃ for 24 hours without any abnormalities, and the cold resistance stability is -5±2℃ for 24 hours without any abnormalities.

[0046] S1: Raw Material Pretreatment. Dilute the natural plant-based anti-hair loss compound extract with five times its mass of deionized water, stirring at 150 rpm for ten minutes until completely dissolved, to obtain a plant extract dilution. Dilute the dry hair repair active ingredient with five times its mass of deionized water, stirring at 150 rpm for ten minutes until completely dissolved, to obtain a repair dilution. Dilute the scalp soothing agent with five times its mass of deionized water, stirring at 150 rpm for ten minutes until completely dissolved, to obtain a soothing dilution. Disperse the thickener with ten times its mass of deionized water, allow to stand until free of particles, then filter through an 80-mesh filter cloth to obtain a thickener dispersion. All the above operations are performed in a constant temperature environment of 30 to 35 degrees Celsius.

[0047] S2: Aqueous Phase Preparation. Add 80% deionized water to a 304 stainless steel reactor with a polished inner wall, and heat to 75 degrees Celsius. Add a mild cleaning surfactant and thickener dispersion, and start the anchor-type stirrer, stirring at 300 rpm for 20 minutes. Nitrogen gas is continuously purged during stirring to prevent oxidation of the raw materials. The materials are completely dissolved and the system is homogeneous and transparent, yielding the aqueous phase. The viscosity of the aqueous phase is controlled between 500 and 800 centipoise, with no wall adhesion or sedimentation.

[0048] S3: Active Phase Mixing. Cool the aqueous phase to 40 degrees Celsius, then add the plant extract diluent, repair diluent, soothing diluent, and moisturizing film-forming agent sequentially. Stir at 200 rpm for 15 minutes, controlling the system temperature to not exceed 45 degrees Celsius throughout the process to ensure full dispersion of the active ingredients, thus obtaining the active mixed phase.

[0049] S4: System Adjustment. Slowly add the pH adjuster to the active mixed phase and stir at low speed for five minutes to adjust the pH of the system to 5.5. Then add the preservative and fragrance, and stir at a rate of 150 revolutions per minute for eight minutes to ensure that all components are mixed evenly.

[0050] S5: Homogenize to a constant volume. Add the remaining deionized water to bring the volume to 100%, and continue stirring until homogeneous. Transfer the system to a ceramic cavity high-pressure homogenizer and homogenize twice at a pressure of 20 MPa, for three minutes each time. The homogenization temperature should not exceed 40 degrees Celsius. After homogenization, the particle size of the system should not exceed 50 micrometers, and the particle size distribution range should not exceed 1.2.

[0051] S6: Inspection and Filling. The shampoo undergoes tests for appearance, pH value, viscosity, foaming power, heat stability, and cold stability. After all indicators pass, it is filtered through a 100-mesh filter cloth and filled using aseptic equipment to obtain the finished natural plant extract anti-hair loss and dry hair repair shampoo.

[0052] Example 2: S1: Raw Material Pretreatment. Dilute the natural plant-based anti-hair loss compound extract with five times its mass of deionized water, stirring at 180 rpm for 12 minutes until completely dissolved, to obtain a plant extract dilution. Dilute the dry hair repair active ingredient with five times its mass of deionized water, stirring at 180 rpm for 12 minutes until completely dissolved, to obtain a repair dilution. Dilute the scalp soothing agent with five times its mass of deionized water, stirring at 180 rpm for 12 minutes until completely dissolved, to obtain a soothing dilution. Disperse the thickener with ten times its mass of deionized water, allow to stand until free of particles, then filter through an 80-mesh filter cloth to obtain a thickener dispersion. All the above operations are performed in a constant temperature environment of 30 to 35 degrees Celsius.

[0053] S2: Aqueous Phase Preparation. Add 80% deionized water to a 304 stainless steel reactor with a polished inner wall, and heat to 78 degrees Celsius. Add a dispersion of mild cleaning surfactant and thickener, and start the anchor-type agitator, stirring at 350 rpm for 25 minutes. Nitrogen gas is continuously purged during stirring to prevent oxidation of the raw materials. The materials are completely dissolved and the system is homogeneous and transparent, yielding the aqueous phase. The viscosity of the aqueous phase is controlled between 500 and 800 centipoise, with no wall adhesion or sediment.

[0054] S3: Active Phase Mixing. Cool the aqueous phase to 42 degrees Celsius, then add the plant extract diluent, repair diluent, soothing diluent, and moisturizing film-forming agent sequentially. Stir at 250 rpm for 18 minutes, controlling the system temperature to not exceed 45 degrees Celsius throughout the process to ensure full dispersion of the active ingredients, thus obtaining the active mixed phase.

[0055] S4: System Adjustment. Slowly add the pH adjuster to the active mixed phase and stir at low speed for eight minutes to adjust the pH of the system to 6.0. Then add the preservative and fragrance, and stir at a rate of 180 rpm for ten minutes to ensure that all components are mixed evenly.

[0056] S5: Homogenize to a constant volume. Add the remaining deionized water to bring the volume to 100%, and continue stirring until homogeneous. Transfer the system to a ceramic cavity high-pressure homogenizer and homogenize twice at a pressure of 22 MPa, for four minutes each time. The homogenization temperature should not exceed 40 degrees Celsius. After homogenization, the particle size of the system should not exceed 50 micrometers, and the particle size distribution range should not exceed 1.2.

[0057] S6: Inspection and Filling. The shampoo undergoes tests for appearance, pH value, viscosity, foaming power, heat stability, and cold stability. After all indicators pass, it is filtered through a 100-mesh filter cloth and filled using aseptic equipment to obtain the finished natural plant extract anti-hair loss and dry hair repair shampoo.

[0058] Example 3: S1: Raw Material Pretreatment. Dilute the natural plant-based anti-hair loss compound extract with five times its mass of deionized water, stirring at 200 rpm for 15 minutes until completely dissolved, to obtain a plant extract dilution. Dilute the dry hair repair active ingredient with five times its mass of deionized water, stirring at 200 rpm for 15 minutes until completely dissolved, to obtain a repair dilution. Dilute the scalp soothing agent with five times its mass of deionized water, stirring at 200 rpm for 15 minutes until completely dissolved, to obtain a soothing dilution. Disperse the thickener with ten times its mass of deionized water, allow to stand until free of particles, then filter through an 80-mesh filter cloth to obtain a thickener dispersion. All the above operations are performed in a constant temperature environment of 30-35 degrees Celsius.

[0059] S2: Aqueous Phase Preparation. Add 80% deionized water to a 304 stainless steel reactor with a polished inner wall, and heat to 80 degrees Celsius. Add a mild cleaning surfactant and thickener dispersion, and start the anchor-type stirrer, stirring at 400 rpm for 30 minutes. Nitrogen gas is continuously purged during stirring to prevent oxidation of the raw materials. The materials are completely dissolved and the system is homogeneous and transparent, yielding the aqueous phase. The viscosity of the aqueous phase is controlled between 500 and 800 centipoise, with no wall adhesion or sediment.

[0060] S3: Active Phase Mixing. Cool the aqueous phase to 45 degrees Celsius, then add the plant extract diluent, repair diluent, soothing diluent, and moisturizing film-forming agent sequentially. Stir at 300 rpm for 20 minutes, controlling the system temperature to not exceed 45 degrees Celsius throughout the process to ensure full dispersion of the active ingredients, thus obtaining the active mixed phase.

[0061] S4: System Adjustment. Slowly add the pH adjuster to the active mixed phase and stir at low speed for ten minutes to adjust the pH of the system to 6.5. Then add the preservative and fragrance, and stir at a rate of 200 rpm for twelve minutes to ensure that all components are mixed evenly.

[0062] S5: Homogenize to a constant volume. Add the remaining deionized water to bring the volume to 100%, and continue stirring until homogeneous. Transfer the system to a ceramic cavity high-pressure homogenizer and homogenize three times at a pressure of 25 MPa, each time for five minutes. The homogenization temperature should not exceed 40 degrees Celsius. After homogenization, the particle size of the system should not exceed 50 micrometers, and the particle size distribution range should not exceed 1.2.

[0063] S6: Inspection and Filling. The shampoo undergoes tests for appearance, pH value, viscosity, foaming power, heat stability, and cold stability. After all indicators pass, it is filtered through a 100-mesh filter cloth and filled using aseptic equipment to obtain the finished natural plant extract anti-hair loss and dry hair repair shampoo.

[0064] Comparative example: The comparative sample used a commercially available conventional anti-hair loss shampoo formula, without the natural plant-based anti-hair loss compound extract of this invention, and without adding dry hair repair active ingredients or a special scalp soothing agent. A single, traditional surfactant was used without gentle compounding. The preparation process did not involve nitrogen protection, segmented cooling, or high-pressure homogenization. All raw materials were mixed and stirred at once without pre-treatment or dilution of the active ingredients, and without controlling particle size and dispersion uniformity. The resulting product only has basic cleaning and partial anti-hair loss effects, weak dry hair repair capabilities, strong scalp irritation, poor system stability, and is prone to stratification and sedimentation during long-term storage.

[0065] Table 1: Comparison of the mass percentage of main components between the examples and comparative examples Table Explanation: This table clearly shows the differences in core components between the three examples and the comparative example. The examples progressively increase the amounts of natural plant extracts, repairing ingredients, surfactants, and film-forming agents to achieve a gradient improvement in efficacy. The comparative example completely lacks anti-hair loss plant extracts, dry hair repairing ingredients, and scalp soothing ingredients, and the surfactant and additive ratios are unreasonable. The comparison visually demonstrates the innovation of this invention in raw material structure, highlighting the design concept of multiple compound effects, and proving that only with the component system described in this invention can the synergistic effects of anti-hair loss, repair, soothing, and gentle cleansing be achieved simultaneously.

[0066] Table 2: Comparison Table of Core Process Parameters for Examples Table Explanation: This table summarizes the key process parameters of the three embodiments. Embodiment 1 uses a gentle, low-energy process, suitable for daily use on sensitive scalps. Embodiment 2 is a balanced process, balancing stability and efficacy. Embodiment 3 uses higher temperatures, higher rotation speeds, and higher pressures to improve the dispersion of active ingredients and product consistency, suitable for severely dry and damaged hair. The parameter changes demonstrate the adjustability and adaptability of the process of this invention, and also prove that under standardized process control, the product system is more stable, the active ingredients are more completely preserved, and the user experience is gentler.

[0067] Table 3: Overall Performance Comparison Table of Examples and Comparative Examples Table Explanation: This table provides a comprehensive evaluation of the product from a practical usage perspective. The three examples all demonstrate excellent performance in terms of hair loss prevention, dry hair repair, gentleness, and stability, with effects gradually improving as the number of active ingredients increases. The comparative example, lacking core active ingredients and scientific processing techniques, shows significantly weaker performance across all indicators. The comparative results prove that this invention, through a blend of natural plant extracts, enhanced dry hair repair, a gentle surfactant system, and refined preparation processes, truly achieves multiple benefits in one, solving the pain point of traditional shampoos' inability to simultaneously address hair loss prevention and dry hair repair, while also improving scalp comfort and product stability, demonstrating significant technological advantages and practical value.

[0068] refer to Figure 2 The bar chart visually presents the differences in hair loss prevention effects between the embodiments of the present invention, the comparative examples, and commercially available products, clearly highlighting the hair loss prevention advantages of the present invention. The hair loss reduction rates of Examples 1 to 3 gradually increase, reaching a maximum of 78%, all significantly higher than the 22% of the comparative example and the 38% of commercially available anti-hair loss shampoos, fully verifying the effectiveness of the natural plant-based anti-hair loss compound extract system. The comparative example, lacking the plant-based compound extract of the present invention, only possesses basic cleansing functions and has a weak anti-hair loss effect; while commercially available products have some anti-hair loss effect, their plant extract components are singular and their compounding is unreasonable, resulting in effects far inferior to the present invention. The chart clearly demonstrates that the present invention, through the scientific compounding of plant extracts such as arborvitae leaf and ginger, can effectively nourish hair follicles and strengthen hair roots, achieving a gentle yet highly effective anti-hair loss effect, solving the pain point of poor efficacy in traditional anti-hair loss products.

[0069] refer to Figure 3 This line graph reveals the correlation between the amount of natural plant-based anti-hair loss compound extract added and the dry hair repair effect, while also demonstrating the technical advantages of this invention. The smoothness score of the example gradually increases with the increase of plant extract addition, rising from 7.2 points at 4% addition to 9.0 points at 8% addition, showing a clear upward trend. This indicates that the plant extract not only prevents hair loss but also synergistically enhances hair smoothness with the dry hair repair ingredients. In contrast, the comparative example, lacking dry hair repair active ingredients, still showed a smoothness score below 5.3 points even with increased plant extract dosage, indicating extremely poor repair effect. Commercially available repair shampoos showed slow score growth and remained consistently lower than the example, due to the lack of synergistic effect between plant extracts and repair ingredients. This graph verifies the synergistic effect of the plant extract and dry hair repair active ingredients of this invention, proving that appropriately increasing the amount of plant extract can further enhance the dry hair repair effect, restoring smoothness and softness to dry hair.

[0070] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A natural plant-based anti-hair loss and dry hair repair shampoo, characterized in that, By weight percentage, it consists of the following components: 4-8% natural plant extract anti-hair loss complex extract, 2-5% dry hair repair active ingredients, 12-20% mild cleansing surfactant, 3-6% moisturizing film-forming agent, 1-3% scalp soothing agent, 0.1-0.5% pH adjuster, 0.3-0.8% thickener, 0.2-0.6% preservative, 0.1-0.4% fragrance, and deionized water to make up to 100%.

2. The natural plant extract anti-hair loss and dry hair repair shampoo according to claim 1, characterized in that, The natural plant extract for preventing hair loss is composed of arborvitae leaf extract, ginger extract, Polygonum multiflorum extract, rosemary extract, and panthenol extract in a mass ratio of 3:2:2:1:

1. The total polyphenol content of the extract is ≥1.5%, the total flavonoid content is ≥1.2%, the extraction solvent is a mixture of food-grade ethanol and deionized water, and the water content of the extract is ≤5%.

3. The natural plant extract anti-hair loss and dry hair repair shampoo according to claim 1, characterized in that, The active ingredient for dry hair repair consists of hydrolyzed keratin, an amino acid complex, phytosterol esters, and ceramide 3 in a mass ratio of 4:3:2:

1. The hydrolyzed keratin has a molecular weight of 5000-8000 Da, the amino acid complex contains leucine, serine, and arginine, the phytosterol esters have a purity of ≥98%, and the ceramide 3 is extracted from plants with a purity of ≥95%.

4. The natural plant extract anti-hair loss and dry hair repair shampoo according to claim 1, characterized in that, The mild cleaning surfactant is composed of potassium cocoyl glycinate, sodium lauroyl sarcosinate, and decyl glucoside in a mass ratio of 2:2:1; the active ingredient content of potassium cocoyl glycinate is ≥90%, the active ingredient content of sodium lauroyl sarcosinate is ≥95%, the purity of decyl glucoside is ≥98%, the foaming power of the surfactant system is ≥180mm, and the detergency is ≥90%.

5. The natural plant extract anti-hair loss and dry hair repair shampoo according to claim 1, characterized in that, The moisturizing film-forming agent is composed of sodium hyaluronate, polyquaternium-73, and hydrolyzed tremella polysaccharide in a mass ratio of 1:3:2; the molecular weight of sodium hyaluronate is 100-200kDa, the solid content of polyquaternium-73 is ≥30%, and the purity of hydrolyzed tremella polysaccharide is ≥90%; the scalp soothing agent is composed of purslane extract, calendula extract, and allantoin in a mass ratio of 2:2:1, and the purity of allantoin is ≥99%.

6. The natural plant extract anti-hair loss and dry hair repair shampoo according to claim 1, characterized in that, The thickener is a compound of xanthan gum and hydroxyethyl cellulose in a mass ratio of 1:1, with xanthan gum having a viscosity ≥1500 cP and hydroxyethyl cellulose having a viscosity ≥20000 cP; the pH adjuster is citric acid or sodium citrate; the preservative is a compound of phenoxyethanol and ethylhexylglycerin in a mass ratio of 4:1; and the fragrance is a compound fragrance of natural plant essential oils.

7. A method for preparing a natural plant extract anti-hair loss and dry hair repair shampoo according to any one of claims 1-6, characterized in that, Includes the following steps: S1: Raw material pretreatment: Dilute the natural plant extract anti-hair loss compound extract, dry hair repair active ingredients, and scalp soothing agent with 5 times their mass of deionized water, and stir until completely dissolved to obtain plant extract diluent, repair diluent, and soothing diluent; disperse the thickener with 10 times its mass of deionized water, and let it stand until there are no particles to obtain thickener dispersion, for later use. S2: Aqueous phase preparation: Add 80% of the formula amount of deionized water to the reactor, heat to 75-80℃, add mild cleaning surfactant and thickener dispersion, stir at a rate of 300-400 rpm for 20-30 minutes until the material is completely dissolved and the system is homogeneous and transparent to obtain the aqueous phase. S3: Active phase mixing: Cool the aqueous phase to 40-45℃, and add the plant extract diluent, repair diluent, soothing diluent, and moisturizing film-forming agent in sequence. Stir at a speed of 200-300 rpm for 15-20 minutes. During the stirring process, control the system temperature to not exceed 45℃ to obtain the active mixed phase. S4: System Adjustment: Add pH adjuster to the active mixed phase and stir slowly for 5-10 minutes to adjust the pH value of the system to 5.5-6.5; then add preservative and fragrance, and stir at a rate of 150-200 rpm for 8-12 minutes to ensure that the components are fully mixed. S5: Volume homogenization: Add the remaining deionized water to the system to make up to 100%, stir evenly, and then send the system to a high-pressure homogenizer. Homogenize 2-3 times under a pressure of 20-25MPa, each time for 3-5 minutes, to make the system have uniform particle size and no agglomerated particles. S6: Testing and Filling: The homogenized shampoo is subjected to performance testing. After passing the test, it is filtered through a 100-mesh filter cloth and filled using aseptic filling equipment to obtain the finished natural plant extract anti-hair loss and dry hair repair shampoo.

8. The preparation method of the natural plant extract anti-hair loss and dry hair repair shampoo according to claim 7, characterized in that, The stirring rate of the raw material pretreatment in S1 is 150-200 rpm, and the stirring time is 10-15 minutes. The dilution and dispersion processes are carried out in a constant temperature environment of 30-35℃. After the thickener is dispersed, it needs to be filtered through an 80-mesh filter cloth to remove undispersed coarse particles.

9. The method for preparing the natural plant extract anti-hair loss and dry hair repair shampoo according to claim 7, characterized in that, The reactor in S2 is made of 304 stainless steel with a polished inner wall and a roughness Ra≤0.8μm. The agitator is an anchor-type agitator, and nitrogen gas is continuously purged during the stirring process to prevent oxidation of the raw materials. The viscosity of the aqueous phase is controlled at 500-800 cP, with no wall adhesion or sedimentation.

10. The method for preparing the natural plant extract anti-hair loss and dry hair repair shampoo according to claim 7, characterized in that, The homogenization chamber of the S5 high-pressure homogenizer is made of ceramic. During the homogenization process, the system temperature is controlled to not exceed 40℃. After homogenization, the particle size of the system is ≤50μm and the particle size distribution span is ≤1.

2. The performance testing items of S6 include appearance, pH value, viscosity, foaming power, heat resistance stability, and cold resistance stability. The heat resistance stability is 40±2℃ for 24 hours without abnormality, and the cold resistance stability is -5±2℃ for 24 hours without abnormality.

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