A composite facial mask containing Astragalus complanatus and its manufacturing method

Abstract

This invention discloses a Astragalus complanatus composite mask and its manufacturing method, belonging to the field of skin care technology. The composite mask uses Astragalus complanatus extract, Eucommia ulmoides leaf extract, Tremella fuciformis fruiting body extract, and ergothioneine as the active phase, enabling the mask to possess multiple skin care effects such as whitening and brightening, anti-inflammatory and soothing, moisturizing and repairing, and anti-aging, solving the problem of single-effect issues in existing skin care products. Furthermore, the Astragalus complanatus composite mask is prepared using a simple and easy-to-implement process, effectively protecting the structure and efficacy of the active ingredients, significantly improving the retention rate and bioavailability of the active ingredients in the mask, and solving the problem of low effective ingredient content and poor skin care effects in existing technologies due to unreasonable control of manufacturing process conditions.

Description

Technical Field

[0001] This invention relates to the field of skincare technology, and in particular to a compound facial mask made from Astragalus complanatus and its manufacturing method. Background Technology

[0002] With the rapid development of the skincare market, consumers are increasingly demanding multi-functional, natural, and safe skincare products. Currently, many skincare products on the market suffer from limited efficacy, failing to simultaneously achieve multiple benefits such as moisturizing, soothing, reducing fine lines, and anti-wrinkle effects. Furthermore, some skincare products contain large amounts of synthetic chemicals, which can easily irritate the skin, especially for those with sensitive skin, causing allergic reactions such as redness, itching, and swelling, thus failing to meet consumer needs. In addition, existing skincare manufacturing processes suffer from inadequate control over process conditions such as temperature, time, and raw material dosage, resulting in low levels of effective ingredients and poor skincare results. Summary of the Invention

[0003] The main objective of this invention is to provide a compound facial mask made from Astragalus complanatus and its manufacturing method, aiming to solve the problems of existing facial masks having limited efficacy, the addition of a large number of chemical ingredients that can easily irritate the skin, and unreasonable control of manufacturing process conditions, resulting in low content of effective ingredients and poor skin care effects.

[0004] To achieve the above objectives, the present invention provides a composite facial mask containing Astragalus complanatus, wherein the components of the composite facial mask include an active phase, a moisturizing phase, a thickening phase, a solubilizing phase, and an auxiliary phase; the active phase includes Astragalus complanatus extract, Eucommia ulmoides leaf extract, Tremella fuciformis fruiting body extract, and ergothioneine.

[0005] Optionally, in the composition of the composite mask, the active phase accounts for 6.0%-10.0% by mass, the moisturizing phase accounts for 10.0%-16.0% by mass, the thickening phase accounts for 0.5%-0.8% by mass, the solubilizing phase accounts for 6.0%-9.0% by mass, the auxiliary phase accounts for 0.3%-1.0% by mass, and the balance is deionized water.

[0006] Optionally, in the active phase, the mass percentage of the Astragalus complanatus extract is 3.0%-6.0%, the mass percentage of the Eucommia ulmoides leaf extract is 1.0%-1.5%, the mass percentage of the Tremella fuciformis fruiting body extract is 1.5%-1.8%, and the mass percentage of the ergothioneine is 0.5%-0.7%.

[0007] Optionally, the moisturizing phase includes glycerin, sodium hyaluronate, hydroxyethyl urea, sodium PCA, glycine, and β-glucan; the thickening phase includes xanthan gum, polyacrylate crosspolymer-6, and allantoin; the solubilizing phase includes at least two of 1,3-propanediol, 1,2-hexanediol, and butylene glycol; and the auxiliary phase includes phenoxyethanol and citric acid.

[0008] To achieve the above objectives, the present invention also provides a method for manufacturing a *Astragalus complanatus* composite facial mask, used to manufacture the aforementioned composite facial mask, the manufacturing method comprising: A basic aqueous solution is prepared based on a thickening phase, a first moisturizing phase, and deionized water. In the aqueous base solution, a co-solvent phase, an active phase, and an auxiliary phase are added sequentially, and the mixture is stirred and homogenized to obtain a crude composite mask. The crude composite mask is filtered, tested, and filled to obtain the Astragalus complanatus composite mask.

[0009] Optionally, the method for preparing an aqueous base solution based on a thickening phase, a first moisturizing phase, and deionized water includes: The thickening phase is added to deionized water, and the mixture is heated to a first temperature and stirred while maintaining the temperature. Then, the first moisturizing phase is added, and the mixture is stirred while maintaining the temperature until homogeneous to obtain the aqueous base solution. The thickening phase includes xanthan gum, polyacrylate crosspolymer-6, and allantoin, and the first moisturizing phase includes glycerin, sodium hyaluronate, and hydroxyethyl urea.

[0010] Optionally, the method of sequentially adding the solubilizing phase, the active phase, and the auxiliary phase to the aqueous base solution, and stirring to homogenize, to obtain the crude composite mask includes: The aqueous base solution is cooled to a second temperature, the co-solvent is added, and the mixture is kept warm and stirred. Then, the solution is cooled to a third temperature, the active phase is added, and the mixture is kept warm and stirred until homogeneous. After homogeneity, the auxiliary phase and the second moisturizing phase are added sequentially, and the mixture is kept warm and stirred until homogeneous. The pH is then adjusted to 5.5-6.0. The co-solvent includes at least two of 1,3-propanediol, 1,2-hexanediol, and butanediol. The auxiliary phase includes phenoxyethanol and citric acid, and the second moisturizing phase includes sodium PCA, glycine, and β-glucan.

[0011] Optionally, the method for preparing the active phase includes: Solvents were added to extracts of Astragalus complanatus, Eucommia ulmoides leaves and Tremella fuciformis fruiting bodies, and the mixture was magnetically stirred at room temperature until completely dissolved. After standing and filtering, the supernatant was collected to obtain the first active mother liquor. Solvent was added to ergothioneine and magnetically stirred at room temperature until completely dissolved to obtain the second active mother liquor. The first and second active mother liquors were mixed with methyl diisopropyl propionamide and stirred until homogeneous in a water bath at 45°C-50°C to obtain the active phase.

[0012] Optionally, the method of heating to a first temperature and then maintaining and stirring includes: Heat to 80℃-84℃ and homogenize for 2-3 minutes, then keep warm and stir at 300rpm-400rpm for 25-30 minutes.

[0013] Optionally, the method of cooling the aqueous base solution to a second temperature, adding the co-solvent phase, and maintaining the temperature with stirring includes: The aqueous base solution is cooled to 65℃-70℃, and then the co-solvent is added. The solution is kept warm and stirred at 150rpm-200rpm for 5min-10min. The method of cooling to the third temperature, adding the active phase, and then maintaining the temperature with stirring includes: After cooling to 45℃-50℃, add the active phase and keep it warm and stirred at 150rpm-200rpm for 10min-15min.

[0014] Compared with the prior art, the beneficial effects that the present invention can achieve are as follows: 1. The Astragalus complanatus composite mask disclosed in this invention uses Astragalus complanatus extract, Eucommia ulmoides leaf extract, Tremella fuciformis fruiting body extract, and ergothioneine as active phases, enabling the mask to possess multiple skincare effects such as whitening and brightening, anti-inflammatory and soothing, moisturizing and repairing, and anti-aging, thus solving the problem of single-effect skincare products in existing skincare products. Furthermore, through the synergistic combination of active phase, moisturizing phase, thickening phase, solubilizing phase, and auxiliary phase, the physical and chemical stability of the final composite mask product during its shelf life is ensured. Simultaneously, through synergistic formulation, good compatibility between the product and facial skin is ensured, resulting in excellent skin feel and safety, thus solving the problem of skin irritation caused by the addition of large amounts of chemical ingredients in existing skincare products.

[0015] 2. The manufacturing method of the Astragalus complanatus composite mask disclosed in this invention is completed through a three-stage process, which is simple and easy to implement, reducing the difficulty of process operation. Moreover, by clearly defining the composition of each phase, the proportion of effective ingredients and the final performance of the product have significant controllability and repeatability. At the same time, it effectively protects the structure and efficacy of active ingredients, significantly improves the retention rate and bioavailability of active ingredients in the mask, and solves the problem of low content of effective ingredients and poor skin care effect in the existing technology due to unreasonable control of manufacturing process conditions. Attached Figure Description

[0016] Figure 1This is a schematic diagram of the process flow for preparing the Astragalus complanatus composite face mask according to the present invention. Detailed Implementation

[0017] 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 a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0018] To address the problems of existing facial masks having limited efficacy, excessive chemical additives that can irritate the skin, and poor skincare effects due to inadequate manufacturing process control, this invention provides a *Astragalus complanatus* composite facial mask. The *Astragalus complanatus* composite facial mask comprises an active phase, a moisturizing phase, a thickening phase, a solubilizing phase, and an auxiliary phase. The active phase includes *Astragalus complanatus* extract, *Eucommia ulmoides* leaf extract, *Tremella fuciformis* fruiting body extract, and ergothioneine.

[0019] Optionally, the total flavonoids in the above-mentioned Astragalus complanatus extract are ≥8%, and the astragaloside is ≥1.2%.

[0020] Optionally, the ratio of chlorogenic acid to total flavonoids in the above-mentioned Eucommia ulmoides leaf extract can be 1:1.

[0021] Optionally, the above-mentioned Tremella fruiting body extract contains ≥40% Tremella polysaccharide.

[0022] In one possible implementation, the composition of the composite mask comprises, by mass, 6.0%-10.0% of the active phase, 10.0%-16.0% of the moisturizing phase, 0.5%-0.8% of the thickening phase, 6.0%-9.0% of the solubilizing phase, 0.3%-1.0% of the auxiliary phase, with the remainder being deionized water.

[0023] It should be noted that in the aforementioned Astragalus complanatus composite mask, by limiting the content of the active phase, i.e., the mass percentage, to 6.0%-10.0%, the active ingredients of Astragalus complanatus extract, Eucommia ulmoides leaf extract, Tremella fuciformis fruiting body extract, and ergothioneine in the active phase can directly act on the deep layers of the skin, thereby achieving significant skin care effects such as a melanin index reduction of ≥18%, a reduction in the depth of fine lines around the eyes of ≥20%, and a reduction in redness area of ​​≥25%, achieving multiple effects such as whitening, anti-inflammation, moisturizing, anti-wrinkle, and anti-aging. Among them, the flavonoid components of Astragalus complanatus and ergothioneine can work synergistically to scavenge free radicals, and Eucommia ulmoides leaf extract and Astragalus complanatus glycosides can work synergistically to promote microcirculation around the eyes. Furthermore, limiting the content of the moisturizing phase to 10.0%-16.0% complements the Tremella fuciformis extract in the active phase, further enhancing the mask's moisturizing effect. Limiting the content of the thickening phase to 0.5%-0.8% and the solubilizing phase to 6.0%-9.0% are key technologies for ensuring the practicality of the mask formula and the activity of its ingredients. The thickening phase regulates the viscosity of the mask essence, ensuring even distribution on the mask sheet and preventing dripping. It also improves the spreadability and residence time of the essence on the skin surface, allowing the active ingredients to fully contact the skin. The solubilizing phase significantly improves the solubility of the active phase ingredients, enhances the compatibility of the components, avoids stability issues such as layering and turbidity, and ensures uniform dispersion of the active and moisturizing phases, guaranteeing stable and efficient function of each ingredient. The auxiliary phase, at 0.3%-1.0%, further synergizes with the active phase, strengthening the skin barrier repair ability and improving skin sensitivity and redness.

[0024] In one possible implementation, in the above-mentioned active phase, the mass percentage of the above-mentioned Astragalus complanatus extract is 3.0%-6.0%, the mass percentage of Eucommia ulmoides leaf extract is 1.0%-1.5%, the mass percentage of Tremella fuciformis fruiting body extract is 1.5%-1.8%, and the mass percentage of ergothioneine is 0.5%-0.7%.

[0025] It should be noted that when the content (by mass) of Astragalus complanatus extract in the above-mentioned active phase is 3.0%-6.0%, it ensures that the abundant flavonoids, polyphenols, and Astragalus complanatus glycosides in the extract form an effective concentration on the skin, achieving the core effects of anti-oxidation, regulating skin metabolism, and nourishing, thereby effectively delaying skin dullness and early aging caused by environmental factors. When the content of Eucommia ulmoides leaf extract is 1.0%-1.5%, it ensures that the chlorogenic acid it contains can inhibit tyrosinase activity, while avoiding skin irritation or antagonistic reactions between components due to excessive amounts, thus achieving effects such as brightening skin tone and improving pigmentation. Furthermore, it can form a good antioxidant synergy with Astragalus complanatus extract, enhancing the skin's ability to resist external stress, thereby improving redness and post-inflammatory hyperpigmentation. When the content of Tremella fuciformis fruiting body extract is 1.5%-1.8%, it is close to that of Eucommia ulmoides leaf extract. This replenishes natural moisturizing factors without causing the essence to be sticky, heavy, or forming an excessively thick film due to excessive polysaccharide content. The Tremella fuciformis polysaccharide component can form a breathable moisturizing film on the skin surface, achieving long-lasting hydration and relieving dryness and peeling. The ergothioneine content is 0.5%-0.7%, providing highly effective cellular-level protection. It can significantly remove reactive oxygen species (ROS) in the skin, protect cell membranes from oxidative damage, enhance skin cell resilience, and reduce fine lines and sagging caused by staying up late and ultraviolet rays. It can also synergize with the effects of Astragalus complanatus and Eucommia ulmoides leaf extract, further enhancing the antioxidant effect of the mask.

[0026] In the aforementioned active phase components, changing the dosage of each component—for example, if the content of Astragalus complanatus extract is <3%, the total flavonoids and Astragalus complanatus glycosides in a unit of mask formulation will be insufficient, thus failing to achieve antioxidant and anti-aging effects; if the content is >6%, the mask essence will darken in color, easily change color, and even experience sedimentation and turbidity. If the content of Eucommia ulmoides leaf extract is <1%, the chlorogenic acid content will be insufficient, thus failing to effectively inhibit tyrosinase activity, significantly reducing the mask's brightening and pigmentation-improving effects; if the content is higher than 1.5%, the chlorogenic acid concentration will be too high, causing some irritation, and excessive flavonoids will disrupt the pH balance of the formula, potentially causing stinging, redness, and other discomfort during use. Furthermore, if the ergothioneine content is below 0.5% or above 0.7%, problems such as ineffective removal of reactive oxygen species from the skin or instability in the mask's ingredient system will occur.

[0027] In one possible implementation, the moisturizing phase comprises glycerin, sodium hyaluronate, hydroxyethyl urea, sodium PCA, glycine, and β-glucan; the thickening phase comprises xanthan gum, polyacrylate crosspolymer-6, and allantoin; the solubilizing phase comprises at least two of 1,3-propanediol, 1,2-hexanediol, and butylene glycol; and the auxiliary phase comprises phenoxyethanol and citric acid.

[0028] Optionally, the content, i.e. the mass percentage, of each component in the above-mentioned moisturizing phase may be 6.0%-8.0% glycerol, 0.30%-1.25% sodium hyaluronate, 2.0%-3.0% hydroxyethyl urea, 1.0%-1.5% sodium PCA, 0.5%-1.5% glycine and 0.2%-0.75% β-glucan.

[0029] Optionally, the content, i.e. the mass percentage, of each component in the above thickening phase can be xanthan gum 0.15%-0.2%, polyacrylate crosspolymer-6 0.2%-0.3%, and allantoin 0.15%-0.3%.

[0030] Optionally, the content, i.e. the mass percentage, of each component in the above-mentioned fluxing phase can be 3.0%-4.0% of 1,3-propanediol, 1.0%-2.0% of 1,2-hexanediol, and 2.0%-3.0% of butanediol.

[0031] Optionally, the content, i.e. the mass percentage, of each component in the above auxiliary phase can be 0.25%-0.7% phenoxyethanol and 0.05%-0.3% citric acid.

[0032] It should be noted that among the components of the aforementioned phases, the large molecules of sodium hyaluronate in the moisturizing phase possess water-locking capabilities, while the small molecules of glycerin and sodium PCA can replenish moisture. Hydroxyethylurea and glycine exhibit significant penetration and further promote molecular activity, and β-glucan can play a role in barrier repair. Therefore, the complex system of the moisturizing phase can achieve end-to-end moisturizing from deep hydration of the stratum corneum to surface water locking, and enhance skin tolerance. Xanthan gum in the thickening phase provides excellent pseudoplastic rheological properties, while polyacrylate cross-linked polymer-6 provides a refreshing gel texture. The combination of these two avoids the stickiness of a single thickener. Allantoin, as an auxiliary thickener, possesses anti-inflammatory and soothing effects, allowing the system to provide skincare benefits while ensuring carrier stability. The solubilizing phase selects at least two of 1,3-propanediol, 1,2-hexanediol, and butylene glycol to solve the problem of miscibility of active phase ingredients, ensuring that the serum system remains clear and does not separate during long-term storage. Citric acid in the auxiliary phase can precisely adjust the pH of the system to a weakly acidic state, and at the same time, it can be combined with phenoxyethanol to optimize the ionization state and solubility of the active ingredients, thereby ensuring the safety and stability of the formulation.

[0033] Furthermore, when the content of the above components is limited, for example, in the moisturizing phase, 2.0%-3.0% hydroxyethyl urea can assist the active phase ingredients in penetrating the skin's base layer; 0.5%-1.5% glycine and 0.2%-0.75% β-glucan work synergistically to repair the skin barrier and relieve dryness, itching, and redness caused by dryness. In the thickening phase, 0.15%-0.2% xanthan gum and 0.2%-0.3% polyacrylate crosspolymer-6 can form an ideal thickening ratio, making the essence a refreshing, non-sticky gel that does not drip when applied and leaves the skin feeling refreshed when removed; 0.15%-0.3% allantoin can not only help stabilize the thickening system but also exert anti-inflammatory, soothing, and cell regeneration-promoting effects, enhancing the overall repair level of the mask. 1,2-Hexanediol, in the range of 1.0%-2.0%, can form a highly efficient preservative synergy with phenoxyethanol, reducing the amount of a single preservative required and improving product safety.

[0034] For the components of each phase mentioned above, deleting or replacing any component in any phase, such as removing glycine or β-glucan from the moisturizing phase, will significantly reduce the moisturizing and repairing effect of the mask; deleting xanthan gum from the thickening phase will cause the rheological control of the mask system to run out. Therefore, in the above mask system, the components of any phase, as well as the components of each phase, cooperate and assist each other to achieve synergistic effects and efficacy, thereby realizing the technical effects of significant efficacy, stability and safety, and excellent skin feel of the resulting composite mask.

[0035] To achieve the above objectives, the present invention also provides a method for manufacturing a *Astragalus complanatus* composite facial mask, such as... Figure 1 As shown, the manufacturing method of the composite mask includes: A basic aqueous solution is prepared based on a thickening phase, a first moisturizing phase, and deionized water. In an aqueous base solution, a co-solvent phase, an active phase, and an auxiliary phase are added sequentially and stirred to homogenize, thereby obtaining a crude composite mask. The crude composite mask was filtered, tested, and filled to obtain the Astragalus complanatus composite mask.

[0036] In the above manufacturing method, the proportions of the components involved can be selected with reference to the above text.

[0037] In one possible implementation, the above method for manufacturing an aqueous base solution includes: Add the above thickening phase to deionized water, heat to a first temperature and stir while maintaining the temperature; then add the above first moisturizing phase, continue stirring while maintaining the temperature until homogeneous, to obtain the above aqueous basic solution; wherein, the thickening phase includes xanthan gum, polyacrylate crosspolymer-6 and allantoin, and the first moisturizing phase includes glycerin, sodium hyaluronate and hydroxyethyl urea.

[0038] In one possible implementation, the method of heating to a first temperature and then holding and stirring includes: Heat to 80℃-84℃ and homogenize for 2-3 minutes, then keep warm and stir at 300rpm-400rpm for 25-30 minutes.

[0039] Optionally, the above homogenization process of 2-3 minutes can be carried out at 10,000-11,000 rpm.

[0040] Optionally, before adding the thickening phase to the deionized water, the deionized water can be injected into a vacuum emulsification vessel, stirred, and then the thickening phase can be added.

[0041] It should be noted that the above-mentioned manufacturing process of the Astragalus complanatus composite mask employs a three-stage process. This process, tailored to the multiphase system characteristics of the mask, achieves technical effects such as thickener dispersion, active ingredient retention, and system homogeneity and stability. First, the thickening phase is added at a high temperature of 80℃-84℃, accompanied by 2-3 minutes of homogenization. This instantly breaks up the agglomeration of thickener particles, ensuring thorough hydration and dispersion. Simultaneously, the moisturizing phase is added while stirring at 300rpm-400rpm, allowing it to perfectly integrate with the already formed network structure of the thickened system. Furthermore, if the temperature is below 80℃ or the homogenization time is less than 2 minutes when adding the thickening phase, insufficient hydration of the thickening phase will result in insufficient system viscosity or uneven distribution, leading to layering, turbidity, or the presence of visible particulate impurities in the resulting mask. If the temperature exceeds 84℃ or the homogenization time exceeds 3 minutes, it will cause the thermal decomposition or oxidation of heat-sensitive ingredients such as astragaloside and ergothioneine in the subsequently added active phase, resulting in a significant decrease in the multiple effects of the mask. In addition, if the stirring speed is less than 300 rpm or greater than 400 rpm, it may cause local turbidity, poor miscibility, or excessive air bubbles in the essence, affecting the filling accuracy.

[0042] In the manufacturing method of the above-mentioned Astragalus complanatus composite mask, if the order of adding materials is changed, such as adding the active phase first, the plant extracts will oxidize and change color, causing the mask essence to turn yellow or brown, and the active ingredients such as ergothioneine to become ineffective. If the active phase is added first and then the solubilizing phase is added, the active phase may precipitate and clump, resulting in extremely poor product stability and layering or precipitation within the shelf life.

[0043] In one possible implementation, the method of sequentially adding a solubilizing phase, an auxiliary phase, and a second active phase to an aqueous base solution, followed by stirring and homogenization to obtain a crude composite mask includes: The aqueous base solution is cooled to a second temperature, a co-solvent is added, and the mixture is kept warm and stirred. Then, the solution is cooled to a third temperature, an active phase is added, and the mixture is kept warm and stirred until homogeneous. After homogeneity, the above-mentioned auxiliary phase and second moisturizing phase are added sequentially, and the mixture is kept warm and stirred until homogeneous. The pH is then adjusted to 5.5-6.0. The co-solvent includes at least two of 1,3-propanediol, 1,2-hexanediol, and butanediol. The auxiliary phase includes phenoxyethanol and citric acid, and the second moisturizing phase includes sodium PCA, glycine, and β-glucan.

[0044] In one possible implementation, the method of cooling to a second temperature, adding a co-solvent, and stirring while maintaining the temperature includes: cooling the aqueous base solution to 65°C-70°C, then adding the co-solvent, and stirring while maintaining the temperature at 150 rpm-200 rpm for 5 min-10 min. The above-mentioned method of cooling to the third temperature, adding the active phase, and then maintaining the temperature with stirring includes: After cooling to 45℃-50℃, add the active phase and keep stirring at 150rpm-200rpm for 10min-15min.

[0045] It should be noted that in the above-mentioned process of manufacturing the crude composite mask, in the first stage, the aqueous base solution is first cooled to 65℃-70℃, then the co-solvent phase is added, and the mixture is kept warm and stirred. Within this temperature range, the polyols and surfactants in the co-solvent phase can quickly penetrate into the thickener network structure formed at high temperature, ensuring the fluidity of the co-solvent phase and effectively dissolving any trace amounts of lipid-soluble components that may be present in the active phase, preventing subsequent turbidity or crystallization. In the second stage, the temperature is lowered to 45℃-50℃, then the active phase is added, and stirring is maintained. Within this temperature range, the active ingredients in the active phase will not undergo thermal degradation or oxidative discoloration, and the stirring speed of 150rpm-200rpm avoids the mechanical damage of the large molecules in the active phase by high shear force, allowing them to be evenly dispersed in the system and exert a long-lasting moisturizing and repairing effect. After stirring evenly, the auxiliary phase and the remaining moisturizing phase components are added sequentially, and stirring is continued until uniform, then the pH is adjusted to 5.5-6.0. In the final stage, natural moisturizing factors such as sodium PCA are added to precisely replenish the ingredients needed by the skin.

[0046] In the aforementioned process of manufacturing the crude composite mask, in the first stage, if the temperature is too low, such as <65℃, the solubilizing efficiency of the co-solubilizing phase will be insufficient, resulting in poor compatibility. If the temperature is too high, such as >70℃, it may accelerate the degradation of residual heat-labile components in the system, thereby posing a thermal risk to the subsequently added active phase. In the second stage, if the temperature after cooling is too low, such as <45℃, the viscosity of the system will increase sharply, making it difficult to disperse evenly after the active phase is added, which may easily lead to excessively high local concentrations causing skin irritation and affecting the product's transparency. If the temperature is >50℃, it may cause browning of polyphenols and ergothioneine in the Astragalus complanatus extract, and the structure of the effective ingredients will be destroyed, resulting in the mask having no anti-aging or antioxidant effects.

[0047] In one possible implementation, the method for manufacturing the above-mentioned active phase includes: Solvents were added to extracts of Astragalus complanatus, Eucommia ulmoides leaves and Tremella fuciformis fruiting bodies, and the mixture was magnetically stirred at room temperature until completely dissolved. After standing and filtering, the supernatant was collected to obtain the first active mother liquor. Solvent was added to ergothioneine and magnetically stirred at room temperature until completely dissolved to obtain the second active mother liquor. The first and second active mother liquors were mixed with methyl diisopropyl propionamide and stirred until homogeneous in a water bath at 45°C-50°C to obtain the active phase.

[0048] Optionally, the solvent for dissolving the plant extracts can be 1,3-propanediol.

[0049] Optionally, when using 1,3-propanediol to dissolve plant extracts, the amount can be 10%-50%.

[0050] Optionally, the active phase may further include a cooling stock solution, wherein the cooling stock solution may be composed of menthol lactate, methyl diisopropyl propionamide and menthol alkyl ethylamine.

[0051] Optionally, when using 1,3-propanediol to dissolve plant extracts, a magnetic stirrer can be used for stirring. After complete dissolution, let it stand for 10-15 minutes.

[0052] It should be noted that during the preparation of the above-mentioned active phase, the insoluble impurities in the extract can be removed by dissolving and allowing it to stand, resulting in a pure active mother liquor. This ensures that the essence system is clear and transparent, free of particle sediment, and reduces the risk of sensitization during subsequent mask use from the source. Simultaneously, the separate dissolution of ergothioneine avoids skin irritation caused by competitive adsorption or excessively high local concentrations due to direct mixing with high-concentration plant extracts. Finally, the two active mother liquors are mixed with methyl diisopropylpropionamide and stirred until homogeneous in a 45℃-50℃ water bath. This effectively reduces the viscosity of the system, increases the diffusion rate of the two mother liquors, and ensures that the active ingredients are fully and uniformly integrated. Furthermore, methyl diisopropylpropionamide, as a stabilizer, can encapsulate the active phase molecules, preventing flocculation or crystallization during subsequent mixing with the aqueous phase. This ensures that the active phase remains stable and homogeneous during storage, thus providing the mask with long-lasting and stable skincare benefits.

[0053] If the active phase mentioned above is directly obtained by mixing Astragalus complanatus extract, Eucommia ulmoides leaf extract, Tremella fuciformis fruiting body extract, and ergothioneine, it will contain a large amount of insoluble plant fiber, starch, colloids, and other impurities. These impurities will be suspended in the essence, making the mask liquid cloudy and dark, and will cause severe stratification of the product during storage. In addition, undissolved active ingredients are encapsulated in impurity clumps, which will cause some areas of the mask system to have excessively high concentrations of active ingredients that irritate the skin, while other areas will have too low a concentration and no skin care effect. Furthermore, solid particles cannot penetrate into the stratum corneum of the skin, and the active ingredients can only remain on the skin surface and evaporate with the essence, thus failing to achieve any skin care effect.

[0054] Example 1 A method for manufacturing a compound facial mask containing Astragalus complanatus includes: S10. Prepare an aqueous base solution based on the thickening phase, the first moisturizing phase, and deionized water, as detailed in S101-S102: S101. According to the amount of each phase in the composite mask composition, take the remaining 870.2% of deionized water (which can be 870.2g) and pour it into the reaction vessel. Turn on the stirring device, and then slowly add 0.15% xanthan gum, 0.25% polyacrylate crosspolymer-6 and 0.15% allantoin while stirring to prevent the thickener from agglomerating. At the same time, raise the temperature to the first temperature of 82°C, turn on the homogenizer and homogenize for 2.5 minutes to fully hydrate and disperse the thickener. Then adjust the stirring speed to 350 rpm and keep stirring at this temperature for 27 minutes until the system is uniform and free of particles. S102. While maintaining a constant stirring rate, add 6.0% glycerol, 0.3% sodium hyaluronate, and 2.5% hydroxyethyl urea. Continue stirring for 5 minutes until all three components are completely dissolved and the system is clear and transparent, thus obtaining an aqueous basic solution for later use. S20. To the aqueous base solution obtained in S10, add the co-solvent, active phase, and auxiliary phase sequentially, stir and homogenize to obtain the crude composite mask, as shown in S201-S202: S201. Cool the aqueous base solution obtained in S10 to the second temperature of 67°C, add 3.5% of 1,3-propanediol, 1.25% of 1,2-hexanediol and 2.5% of butanediol, adjust the stirring speed to 175 rpm, keep warm and stir for 7 min until the co-solvent phase is completely dispersed and the system is free of oil droplets and turbidity. S202. Continue cooling the system to the third temperature of 47℃, add the pre-prepared active phase, which consists of 4.5% Astragalus complanatus extract, 1.25% Eucommia ulmoides leaf extract, 1.65% Tremella fuciformis fruiting body extract, and 0.6% ergothioneine. The Astragalus complanatus extract contains ≥8% total flavonoids and ≥1.2% Astragalus complanatus glycosides. The ratio of chlorogenic acid to total flavonoids in the Eucommia ulmoides leaf extract is 1:1. The Tremella fuciformis fruiting body extract contains ≥40% Tremella fuciformis polysaccharides. Maintain a stirring speed of 175 rpm and stir for 12 min until the active phase is completely integrated with the system and there is no stratification. Then, add 0.6% phenoxyethanol, 0.05% citric acid, 1.25% sodium PCA, 0.75% glycine, and 0.3% β-glucan in sequence, and continue stirring for 10 min until all components are completely dissolved and the system is homogeneous. Then, use citric acid to fine-tune the pH of the system to 5.7 and stir for 5 min to obtain the crude composite mask. The preparation method of the active phase is as follows: Take 4.5% of Astragalus complanatus extract, 1.25% of Eucommia ulmoides leaf extract, and 1.65% of Tremella fuciformis fruiting body extract, add 5% deionized water as solvent, place on a magnetic stirrer, and stir magnetically for 15 min at room temperature (25℃) until the three extracts are completely dissolved; then let stand for 10 min, filter with a 0.22μm filter membrane to remove insoluble impurities, collect the supernatant to obtain the first active mother liquor; take 0.6% ergothioneine, add 5% deionized water as solvent, and stir magnetically for 8 min at room temperature until the ergothioneine is completely dissolved and there are no visible particles to the naked eye to obtain the second active mother liquor; mix the first and second active mother liquors with 2.0% methyl diisopropylpropionamide, place in a 47℃ water bath, keep the water bath temperature stable between 45℃ and 50℃, and stir magnetically for 12 min until the system is uniform, clear, without layering or precipitation to obtain the active phase; S30. Filter the crude composite mask obtained in S20 using a 0.22μm filter membrane to remove minute impurities, air bubbles, and incompletely dissolved microparticles that may have been introduced during the production process, resulting in a clear and uniform mask essence. Take a small amount of the filtered essence and test its pH value, viscosity, microbial indicators, and active ingredient content to ensure that all indicators meet the technical requirements. Fill the qualified mask essence into a mask cloth, such as a silk mask cloth, at a rate of 25g-30g per sheet, seal and label to complete the preparation of the Astragalus complanatus composite mask and obtain the finished product.

[0055] Based on S10-S30, a composite facial mask made from Astragalus complanatus was obtained. The composite facial mask consists of an active phase, a moisturizing phase, a thickening phase, a solubilizing phase, and an auxiliary phase. The active phase is composed of 4.5% Astragalus complanatus extract, 1.25% Eucommia ulmoides leaf extract, 1.65% Tremella fuciformis fruiting body extract, and 0.6% ergothioneine. The Astragalus complanatus extract contains ≥8% total flavonoids and ≥1.2% Astragalus complanatus glycosides. The ratio of chlorogenic acid to total flavonoids in the Eucommia ulmoides leaf extract is 1:1. The Tremella fuciformis fruiting body extract contains ≥40% Tremella fuciformis polysaccharides. The moisturizing phase comprises 6.0% glycerin, 0.3% sodium hyaluronate, 2.5% hydroxyethyl urea, 1.25% sodium PCA, 0.75% glycine, and 0.3% β-glucan; the thickening phase comprises 0.15% xanthan gum, 0.25% polyacrylate crosspolymer-6, and 0.15% allantoin; the solubilizing phase comprises 3.5% 1,3-propanediol, 1.25% 1,2-hexanediol, and 2.5% butylene glycol; and the auxiliary phase comprises 0.6% phenoxyethanol and 0.05% citric acid.

[0056] The core efficacy of the Astragalus complanatus composite mask obtained in Example 1 was measured and evaluated, specifically including: evaluation of moisturizing efficacy, evaluation of antioxidant efficacy, evaluation of repair efficacy and evaluation of formula stability, as detailed below.

[0057] First, the moisturizing effect was evaluated: The synergistic effect of moisturizing (hydration, water retention, and repair) was verified by testing skin moisture content and transepidermal water loss before and after using the mask. Specifically, 20 volunteers (10 with dry skin and 10 with normal skin) were selected for the test, and the results are as follows: Skin moisture content: The average facial moisture content before application was 32.5%. One hour after application, the average moisture content increased to 58.3%, and after four hours, it remained at 47.6%, representing a 79.4% increase. The continued high level of moisture retention after four hours indicates a long-lasting moisturizing effect. Transepidermal water loss (TEWL): The average TEWL value before application was 28.6 g / (m²). 2 After 4 hours of use, the average TEWL value decreased to 18.2 g / (m³). 2The decrease of 36.4% (·h) indicates that β-glucan and moisturizing ingredients work synergistically to effectively repair the skin barrier and reduce moisture loss.

[0058] Secondly, the antioxidant efficacy was evaluated: DPPH free radical scavenging rate, ABTS free radical scavenging rate, and changes in skin surface free radical content were used as indicators. The antioxidant capacity was verified through in vitro free radical scavenging experiments, and combined with skin surface free radical testing, the actual antioxidant effect after the active ingredients penetrated was verified. The results were as follows: In the in vitro free radical scavenging experiment, the DPPH free radical scavenging rate of the mask essence in the example was 82.7% (concentration of 50 μg / mL), and the ABTS free radical scavenging rate was 88.3% (concentration of 50 μg / mL), indicating that it has strong in vitro antioxidant capacity. Skin surface free radical test: 1 hour after using the mask, the content of free radicals on the skin surface decreased by an average of 63.5%, and 51.2% after 3 hours. This indicates that the active ingredients can effectively penetrate the skin surface, exert a continuous antioxidant effect, and reduce the damage of free radicals to the skin.

[0059] In addition, the repair efficacy was evaluated using skin barrier repair rate and skin redness as scoring indicators. Fifteen volunteers with sensitive skin were selected and used the mask once a day for three consecutive days. The results were as follows: Skin barrier repair rate: Before use, the average skin barrier damage index was 3.8 (1-5 points, the higher the score, the more serious the damage). After 3 days of use, the average dropped to 1.6, with a repair rate of 57.9%, indicating that it can effectively repair the damaged skin barrier. Skin redness index: The average facial redness score before use was 3.2, and after 3 days of use, it dropped to an average of 1.3, with significant relief of redness. There was no stinging, itching or other discomfort, indicating that the product is gentle.

[0060] Formulation stability evaluation: Appearance, viscosity, and pH were used as evaluation indicators, specifically: Viscosity: After 12 months of storage at room temperature, the viscosity remained between 1480 mPa·s and 1520 mPa·s (initial viscosity 1500 mPa·s), with a change of ≤2.7%, indicating that the rheological properties of the system are stable. pH value: After 12 months of storage, the pH value remains between 5.6 and 5.8 without significant fluctuations, which meets the requirement of pH 5.5-6.0 in the technical solution, ensuring the stability of the active ingredients; Appearance: After 12 months of storage at room temperature, the essence of the mask remains clear and transparent, without turbidity, layering, sedimentation, or discoloration, and its appearance is consistent with that when it was first prepared, with no impurities visible to the naked eye.

[0061] Example 2 A method for manufacturing a compound facial mask containing Astragalus complanatus includes: S10. Prepare an aqueous base solution based on the thickening phase, the moisturizing phase, and deionized water, as detailed in S101-S102: S101. According to the dosage of each phase in the composite mask composition, take the remaining deionized water and pour it into the reaction vessel. Turn on the stirring device, and then slowly add 0.2% xanthan gum, 0.3% polyacrylate crosspolymer-6 and 0.15% allantoin while stirring to prevent the thickener from agglomerating. At the same time, raise the temperature to the first temperature of 80°C, turn on the homogenizer and homogenize for 3 minutes to fully hydrate and disperse the thickener. Then adjust the stirring speed to 300 rpm and keep stirring at this temperature for 30 minutes until the system is uniform and free of particles. S102. While maintaining a constant stirring rate, add 7.0% glycerol, 0.65% sodium hyaluronate, and 2.0% hydroxyethyl urea. Continue stirring for 5 minutes until all three components are completely dissolved and the system is clear and transparent, thus obtaining an aqueous basic solution for later use. S20. To the aqueous base solution obtained in S10, add the co-solvent, active phase, and auxiliary phase sequentially, stir and homogenize to obtain the crude composite mask, as shown in S201-S202: S201. Cool the aqueous base solution obtained in S10 to the second temperature of 65℃, add 3.0% of 1,3-propanediol, 1.0% of 1,2-hexanediol and 3.0% of butanediol, adjust the stirring speed to 150 rpm, keep warm and stir for 10 min until the co-solvent phase is completely dispersed and the system is free of oil droplets and turbidity. S202. Continue cooling the system to the third temperature of 45℃, add the pre-prepared active phase, which consists of 6.0% Astragalus complanatus extract, 1.5% Eucommia ulmoides leaf extract, 1.8% Tremella fuciformis fruiting body extract, and 0.7% ergothioneine. The Astragalus complanatus extract contains ≥8% total flavonoids and ≥1.2% Astragalus complanatus glycosides. The ratio of chlorogenic acid to total flavonoids in the Eucommia ulmoides leaf extract is 1:1. The Tremella fuciformis fruiting body extract contains ≥40% Tremella fuciformis polysaccharides. Maintain a stirring speed of 150 rpm and stir for 15 min until the active phase is completely integrated with the system and there is no stratification. Then, add 0.6% phenoxyethanol, 0.05% citric acid, 1.5% sodium PCA, 0.7% glycine, and 0.2% β-glucan in sequence, and continue stirring for 10 min until all components are completely dissolved and the system is homogeneous. Then, finely adjust the pH of the system to 6.0 with citric acid and stir for 5 min to obtain the crude composite mask. The preparation method of the active phase is as follows: 6.0% of Astragalus complanatus extract, 1.0% of Eucommia ulmoides leaf extract, and 1.5% of Tremella fuciformis fruiting body extract were added to 5% deionized water as a solvent and placed on a magnetic stirrer. The mixture was magnetically stirred for 15 minutes at room temperature (25℃) until the three extracts were completely dissolved. Then, the mixture was allowed to stand for 10 minutes and filtered through a 0.22μm filter membrane to remove insoluble impurities. The supernatant was collected to obtain the first active mother liquor. Ergothioneine was added to 5% deionized water as a solvent and magnetically stirred for 8 minutes at room temperature until the ergothioneine was completely dissolved and there were no visible particles, thus obtaining the second active mother liquor. The first and second active mother liquors were mixed with 2.0% methyl diisopropylpropionamide and placed in a 47℃ water bath. The water bath temperature was kept stable between 45℃ and 50℃ and magnetically stirred for 12 minutes until the system was homogeneous, clear, and free of stratification and precipitation, thus obtaining the active phase. S30. Filter the crude composite mask obtained in S20 using a 0.22μm filter membrane to remove minute impurities, air bubbles, and incompletely dissolved microparticles that may have been introduced during the production process, resulting in a clear and uniform mask essence. Take a small amount of the filtered essence and test its pH value, viscosity, microbial indicators, and active ingredient content to ensure that all indicators meet the technical requirements. Fill the qualified mask essence into a mask cloth, such as a silk mask cloth, at a rate of 25g-30g per sheet, seal and label to complete the preparation of the Astragalus complanatus composite mask and obtain the finished product.

[0062] Based on S10-S30, a *Astragalus complanatus* composite facial mask was obtained. The composite mask comprises an active phase, a moisturizing phase, a thickening phase, a solubilizing phase, and an auxiliary phase. The active phase consists of 6.0% *Astragalus complanatus* extract, 1.5% *Eucommia ulmoides* leaf extract, 1.8% *Tremella fuciformis* fruiting body extract, and 0.7% ergothioneine. The *Astragalus complanatus* extract contains ≥8% total flavonoids and ≥1.2% *Astragalus complanatus* glycosides. The ratio of chlorogenic acid to total flavonoids in the *Eucommia ulmoides* leaf extract is 1:1. The *Tremella fuciformis* fruiting body extract contains ≥40% *Tremella fuciformis* polysaccharides. The moisturizing phase includes 7.0% glycerin, 0.65% sodium hyaluronate, 2.0% hydroxyethyl urea, 1.5% sodium PCA, 0.7% glycine, and 0.2% β-glucan; the thickening phase includes 0.2% xanthan gum, 0.3% polyacrylate crosspolymer-6, and 0.15% allantoin; the solubilizing phase includes 3.0% 1,3-propanediol, 1.0% 1,2-hexanediol, and 3.0% butylene glycol; and the auxiliary phase includes 0.6% phenoxyethanol and 0.05% citric acid.

[0063] Example 3 The difference between this embodiment and Embodiment 2 is that the active phase of this composite mask consists of 3.0% Astragalus complanatus extract, 1% Eucommia ulmoides leaf extract, 1.5% Tremella fuciformis fruiting body extract and 0.5% ergothioneine. The remaining steps and process conditions are the same as in Embodiment 2, and the Astragalus complanatus composite mask is finally obtained.

[0064] Comparative Example 1 Comparative Example 1 was set up under Example 2. In Comparative Example 1, the active phase was obtained by directly mixing Astragalus complanatus extract, Eucommia ulmoides leaf extract, Tremella fuciformis fruiting body extract and ergothioneine and stirring evenly. The remaining steps and process conditions were the same as in Example 2, and the Astragalus complanatus composite mask was finally obtained.

[0065] Comparative Example 2 Comparative Example 2 was set up under Example 2. The difference between Example 2 and Example 2 is that the manufacturing temperature was controlled at 45℃-50℃ throughout the process; the other components, contents and processes were the same as in Example 2, and the final product was a Astragalus complanatus composite mask.

[0066] Comparative Example 3 Comparative Example 3 was set up under Example 2. The difference between Example 2 and Example 3 is that the active phase does not contain ergothioneine and is replaced by an equal amount of deionized water; the other components, contents and processes are the same as those in Example 2, and the final product is a Astragalus complanatus composite mask.

[0067] Comparative Example 4 Comparative Example 4 was set up under Example 2. The difference between Example 2 and Example 4 is that the active phase does not contain Astragalus complanatus extract and is replaced by an equal amount of deionized water; the other components, contents and processes are the same as those in Example 2, and the Astragalus complanatus composite mask is finally obtained.

[0068] Comparative Example 5 Comparative Example 5 was set up under Example 2. The difference between Comparative Example 5 and Example 2 is that Comparative Example 5 contains only moisturizing phase, thickening phase, solubilizing phase, auxiliary phase and deionized water, and does not contain active phase. The rest of the process is the same as that of Example 2, and the final product is a Astragalus complanatus composite mask.

[0069] The Cosmetic Safety Technical Specifications (2015 Edition) measured several parameters of the Astragalus complanatus composite masks obtained in Examples 1-3 and Comparative Examples 1-5, including appearance, viscosity change, increase in skin moisture content, decrease in TEWL, DPPH free radical scavenging rate, skin barrier repair rate, and redness improvement score. Some of the test items were the same as those in Example 1, and the test methods were the same as those in Example 1. The results are shown in Table 1.

[0070] The basis for setting each indicator, the testing method, and the judgment criteria are as follows: 1. Appearance (stored at room temperature for 12 months) (1) Basis for setting: The core of this invention is to solve the problem of poor stability caused by unreasonable process of existing masks. Appearance is the most intuitive manifestation of product stability, which directly reflects the compatibility of the formula, the uniformity of the dispersion of the active phase and the rationality of the process. It is the basic indicator for judging the technical effect of "product stability" in the patent.

[0071] (2) Testing method: The finished masks of each experimental group (filled into silk membrane cloth and sealed) were placed in a normal temperature (25±2℃) and relative humidity (60±5%) environment and stored in the dark for 12 months. The appearance changes were observed once a month and the final state was summarized after 12 months.

[0072] (3) Judgment criteria: "Clear and transparent, no sediment, no layering, and uniform color" is the best; "Clear and transparent, no sediment, and no layering" is good; "Slightly turbid, no layering, and no obvious sediment" is qualified but has poor stability; "Turbid, with particles, layering, and sediment" is unqualified, which is consistent with the advantages of the process and formula of this invention.

[0073] 2. Viscosity change (12 months, %) (1) Basis for setting: Viscosity directly affects the skin feel (refreshing, non-dripping) and stability of the mask essence. The purpose of the compounding of the thickening phase in this invention is to control viscosity. Therefore, it is necessary to verify the synergistic effect of the thickening phase and the long-term stability of the formula through the viscosity change after 12 months of storage, which echoes the technical effect of "improving product stability" in the patent.

[0074] (2) Detection method: Using a rotational viscometer (NDJ-1 type), the initial viscosity of the mask essence in each experimental group (within 24 hours after preparation) and the viscosity after 12 months of storage at room temperature were measured at 25℃ and 60 rpm. The viscosity change rate was calculated using the formula: viscosity change rate (%) = |viscosity after 12 months - initial viscosity| / initial viscosity × 100%.

[0075] (3) Judgment criteria: viscosity change rate ≤ 1.0% is excellent stability; 1.0% < change rate ≤ 2.0% is good stability; 2.0% < change rate ≤ 10.0% is poor stability; change rate > 10.0% is unqualified stability.

[0076] 3. Increased skin hydration (1 hour, %) (1) Basis for setting: Moisturizing is one of the core effects of this invention. The increase in skin moisture content directly reflects the moisturizing ability of the mask. Combining the synergistic moisturizing design of the moisturizing phase and the active phase (Tremella fuciformis extract) of this invention, this indicator is set to verify the technical effect of "full-link moisturizing" and quantify the moisturizing effect advantage.

[0077] (2) Detection method: 20 volunteers (10 with dry skin and 10 with neutral skin) were selected. Before the experiment, they cleaned their faces with warm water and sat quietly for 30 minutes to adapt to the environment (25±2℃, humidity 60±5%). The initial moisture content of the designated area (cheek) of the face was detected by the skin moisture meter (Corneometer CM825). The corresponding experimental group mask was applied for 20 minutes. After removing the mask, the residual essence was gently wiped off with a clean tissue. The moisture content of the area was detected after 1 hour. The improvement rate was calculated by formula: Moisture content improvement rate (%) = (moisture content after 1 hour - initial moisture content) / initial moisture content × 100%. The average value of the 20 volunteers was taken as the final data.

[0078] (3) Judgment criteria: an improvement rate of ≥80% is the best; 75%≤improvement rate<80% is good; 50%≤improvement rate<75% is average; 40%≤improvement rate<50% is poor; and an improvement rate<40% is the worst.

[0079] 4. TEWL decreased (4h, %) (1) Basis for setting: TEWL (transepidermal water loss) reflects the function of the skin barrier. The present invention aims to achieve the dual effects of "moisturizing + repairing". The decrease in TEWL can quantify the water-locking ability and repair effect of the skin barrier, which echoes the technical purpose of "repairing the skin barrier and reducing water loss" in the patent.

[0080] (2) Detection method: Simultaneously with the skin moisture content detection, the transdermal water loss tester (Tewameter™ 300) was used to detect the TEWL value of a designated area of ​​the face of volunteers before applying the mask and 4 hours after application; the decrease rate was calculated using the formula: TEWL decrease rate (%) = (initial TEWL value - TEWL value after 4 hours) / initial TEWL value × 100%, and the average value of 20 volunteers was taken.

[0081] (3) Judgment criteria: a decrease rate ≥ 35% is the best; 30% ≤ decrease rate < 35% is good; 20% ≤ decrease rate < 30% is average; 10% ≤ decrease rate < 20% is poor; and a decrease rate < 10% is the worst.

[0082] 5. DPPH free radical scavenging rate (%) (1) Basis for setting: The core function of the active phase (Sophora astragalus extract + ergothioneine, etc.) in this invention is anti-oxidation. DPPH free radical scavenging rate is a classic quantitative indicator of in vitro antioxidant capacity. It is used to verify the synergistic antioxidant effect of the quaternary compound of the active phase and support the technical effect of the patent "anti-oxidation and anti-aging".

[0083] (2) Detection method: In vitro free radical scavenging experiment was adopted. The essence of each experimental group of mask was diluted to a concentration of 50 μg / mL. 2 mL of the diluted solution was mixed with 2 mL of DPPH solution (0.1 mmol / L) and reacted in the dark for 30 min. The absorbance was measured at a wavelength of 517 nm using a UV spectrophotometer (752 type). Anhydrous ethanol was used as a blank control. The scavenging rate was calculated by formula: Scavenging rate (%) = (Absorbance of blank group - Absorbance of sample group) / Absorbance of blank group × 100%. Each sample was measured in parallel 3 times and the average value was taken.

[0084] (3) Judgment criteria: ≥85% clearance rate is the best; 80%≤clearance rate<85% is good; 60%≤clearance rate<80% is average; 40%≤clearance rate<60% is poor; clearance rate<40% is the worst.

[0085] 6. Skin barrier repair rate (3 days, %) (1) Basis for setting: This invention is designed for people with sensitive skin. Repairing the skin barrier is one of the core functions. This indicator quantifies the mask's ability to repair the damaged skin barrier, verifies the synergistic repair effect of the active phase (ergothioneine, β-glucan) and the moisturizing phase, and enhances the inventiveness of the patent.

[0086] (2) Detection method: 15 volunteers with sensitive skin (skin barrier damage index 3-4 points, 1-5 points, the higher the score, the more serious the damage); the skin barrier damage index of the volunteers' face was detected before the experiment; for 3 consecutive days, the corresponding experimental group mask was applied for 20 minutes each day; after the application on the 3rd day, the skin barrier damage index was detected; the repair rate was calculated, the formula is: repair rate (%) = (initial damage index - damage index after 3 days) / initial damage index × 100%, and the average value of 15 volunteers was taken.

[0087] (3) Judgment criteria: Repair rate ≥ 60% is the best; 55% ≤ repair rate < 60% is good; 35% ≤ repair rate < 55% is average; 30% ≤ repair rate < 35% is poor; repair rate < 20% is the worst.

[0088] 7. Redness Improvement Score (1-5 points, the lower the score, the better) (1) Basis for setting: Redness is a common problem of sensitive skin. This invention aims to solve the problem of "easy irritation and redness" of existing skin care products. This indicator directly reflects the anti-inflammatory and soothing effect of the mask, quantifies the gentleness of the product, and supports the technical advantages of the patent "safety and soothing".

[0089] (2) Detection method: Simultaneously with the skin barrier repair rate test, 15 volunteers with sensitive skin were selected. Before the experiment, the degree of facial redness of the volunteers was scored according to the "Cosmetic Efficacy Evaluation Standard" (1 point: no redness; 2 points: slight redness; 3 points: obvious redness; 4 points: severe redness; 5 points: redness and swelling). After applying the corresponding experimental group mask for 3 consecutive days, the score was scored again, and the average score of the 15 volunteers was taken as the final data.

[0090] (3) Judgment criteria: a score ≤ 1.2 is the best; 1.2 < score ≤ 1.5 is good; 2.0 < score ≤ 2.8 is average; and a score > 3.0 is the worst.

[0091] Table 1

[0092] Analysis of Table 1 shows that the composite mask prepared in Example 1 has the best effect. In this example, the active phase components (4.5% Astragalus complanatus extract, 1.25% Eucommia ulmoides leaf extract, 1.65% Tremella fuciformis fruiting body extract, and 0.6% ergothioneine) achieve the best synergistic effect. Furthermore, it strictly follows the three-stage temperature control process and the graded dissolution and filtration process of the active phase. Therefore, it performs best in all test items. Specifically, the skin moisture content increase of 82.6%, DPPH free radical scavenging rate of 86.5%, and skin barrier repair rate of 61.3% are all significantly higher than other examples. The viscosity change is only ≤0.8%, the appearance remains optimal, and the redness improvement score is as low as 1.1 points. This indicates that the formula and process can maximize the synergistic effect of each component, achieving the optimal balance of moisturizing, anti-oxidation, repair, and stability.

[0093] The composite masks prepared in Examples 2 and 3 were of slightly lower quality, but still better than all comparative examples. In Example 3, the concentration of each active component in the active phase was relatively low, resulting in all efficacy indicators being slightly lower than those in Example 1. In Example 2, the concentration of Astragalus complanatus extract in the active phase was high, resulting in a slightly yellowish mask and a slightly higher viscosity change than in Example 1. At the same time, the excessively high concentration of active components did not further improve efficacy. Instead, due to a slight deviation in the synergistic ratio between components, all efficacy indicators were slightly lower than those in Example 1. This confirms that the higher the concentration of the active phase, the better the effect. The optimal synergistic effect can be achieved by a ratio within the middle range.

[0094] Comparative Example 5 showed the worst results: This comparative example contained only moisturizing phase, thickening phase, solubilizing phase, auxiliary phase, and deionized water, without any active phase components. Therefore, all efficacy indicators were the lowest, with skin hydration increasing by only 28.3%, DPPH free radical scavenging rate at only 12.7%, skin barrier repair rate at only 15.3%, and redness improvement score as high as 3.1 points. This proves that the active phase is the key to achieving the core effects of moisturizing, anti-oxidation, anti-inflammatory repair, etc. in the mask of this invention. Without the active phase, the expected skin care effect cannot be achieved, further proving the necessity of the active phase formula of this invention.

[0095] The absence of ergothionein, a key component in the active phase, in Comparative Example 3 resulted in a significant decrease in antioxidant efficacy. At the same time, the skin barrier repair rate and hydration improvement were also greatly reduced. This indicates that ergothionein has a synergistic antioxidant and repair effect with Astragalus complanatus extract, Eucommia ulmoides leaf extract, and Tremella fuciformis fruiting body extract. The absence of any single component can lead to a significant decline in overall efficacy, which confirms the ingenuity of the quaternary compound active phase.

[0096] Comparative Example 1 did not employ the active phase fractionation dissolution, filtration for impurity removal, and addition of methyl diisopropyl propionamide processes of this invention, resulting in stability issues such as turbidity, layering, and precipitation in the face mask. At the same time, the active ingredients could not be evenly dispersed, and some were encapsulated by impurities and could not exert their effects. Therefore, all efficacy indicators decreased significantly, proving that the active phase preparation process of this invention can effectively improve the utilization rate of active ingredients and product stability, which is an important guarantee for achieving good results.

[0097] Comparative Example 2 did not use the three-stage temperature control process of the present invention, but used a single temperature for feeding throughout the process. This resulted in insufficient hydration of the thickening phase, insufficient solubilization efficiency of the solubilizing phase, and slight degradation of the heat-sensitive components of the active phase. As a result, the product was slightly turbid, and all efficacy indicators and stability were lower than those of the Example. This proves that the three-stage temperature control process can effectively protect the active ingredients and improve the compatibility of each phase.

[0098] Although the extract of Astragalus complanatus in the active phase of Comparative Example 4 retained the extracts of Eucommia ulmoides leaf, Tremella fuciformis fruiting body, and ergothioneine, it still exerted certain moisturizing and antioxidant effects. However, due to the lack of active ingredients such as flavonoids and Astragalus complanatus glycosides in the extract of Astragalus complanatus, the efficacy index was significantly lower than that of the example. This indicates that the extract of Astragalus complanatus is the core component in the active phase that achieves antioxidant and anti-aging effects and works synergistically with other components. This further confirms the non-obviousness of the quaternary complex of the active phase.

[0099] Analysis and comparison show that the technical features of the disclosed technical solution are not simply superimposed, but have a synergistic effect, which significantly improves the efficacy of the obtained Astragalus complanatus composite mask.

[0100] The Astragalus complanatus composite masks obtained in Examples 1-2 were tested and evaluated for safety according to the "Cosmetic Safety Technical Specifications" (2015 edition). The test items included: Microbiological testing: total bacterial count, total mold and yeast count, thermotolerant coliforms, Staphylococcus aureus, Pseudomonas aeruginosa; Physicochemical tests: mercury, lead, arsenic, cadmium, dioxane, and free formaldehyde content; The test results are shown in Tables 2 and 3, respectively.

[0101] Table 2

[0102] Table 3

[0103] Analysis of the test results in Tables 2 and 3 shows that the microbial content and physicochemical indicators of the Astragalus complanatus composite mask obtained in the example all meet the requirements of the "Cosmetic Safety Technical Specifications".

[0104] In accordance with the "Cosmetic Safety Technical Specifications" (2015 edition), the skin irritation of the Astragalus complanatus composite masks obtained in Examples 1-2 was tested, specifically as follows: The subjects of the experiment were healthy adult New Zealand rabbits, weighing 2.0kg-2.5kg, all of which were female, purchased from Jinan Xilingjiao Breeding Center, with experimental animal production license number SCXK (Lu) 2020 0004 and experimental animal quality certificate number NO.370822250100051442. The skin irritation test method was as follows: Animals were acclimatized to the experimental animal room environment for 3 days before the experiment. Four animals were then selected, and hair was removed from both sides of the spine on the back, with each side measuring approximately 3cm × 3cm. After 24 hours of observation, 0.5mL of the original Astragalus complanatus composite mask was applied to one side of the shaved area of ​​an undamaged rabbit, covering an area of ​​2.5cm × 2.5cm. The other side of the shaved area served as a control. The mask was applied twice daily, morning and evening, for 14 consecutive days. Starting from the second day, the hair was clipped before each application, and any remaining test substance was removed with warm water. Skin reactions at the application site were observed 1 hour after removal of the test substance, and skin irritation was scored according to the relevant provisions of the "Cosmetic Safety Technical Specifications" (2015 edition). After the experiment, the total score over 14 days, the average score for each animal over 14 days, and the average score for each animal per day were calculated, and the intensity of skin irritation was graded. The experimental results are shown in Table 4.

[0105] Table 4

[0106] Analysis of the test results in Table 4 shows that the Astragalus complanatus composite mask obtained in the example has no skin irritation.

[0107] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural or procedural transformations made based on the description and drawings of the present invention, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of the present invention.

Claims

1. A composite facial mask containing Astragalus complanatus, characterized in that, The composite mask comprises an active phase, a moisturizing phase, a thickening phase, a solubilizing phase, and an auxiliary phase; the active phase includes extracts of Astragalus complanatus, Eucommia ulmoides leaves, Tremella fuciformis fruiting bodies, and ergothioneine.

2. The composite mask according to claim 1, characterized in that, In the composition of the composite mask, the active phase accounts for 6.0%-10.0% by mass, the moisturizing phase accounts for 10.0%-16.0% by mass, the thickening phase accounts for 0.5%-0.8% by mass, the solubilizing phase accounts for 6.0%-9.0% by mass, the auxiliary phase accounts for 0.3%-1.0% by mass, and the remainder is deionized water.

3. The composite mask according to claim 1, characterized in that, In the active phase, the mass percentage of Astragalus complanatus extract is 3.0%-6.0%, the mass percentage of Eucommia ulmoides leaf extract is 1.0%-1.5%, the mass percentage of Tremella fuciformis fruiting body extract is 1.5%-1.8%, and the mass percentage of ergothioneine is 0.5%-0.7%.

4. The composite mask according to claim 2, characterized in that, The moisturizing phase includes glycerin, sodium hyaluronate, hydroxyethyl urea, sodium PCA, glycine, and β-glucan; the thickening phase includes xanthan gum, polyacrylate crosspolymer-6, and allantoin; the solubilizing phase includes at least two of 1,3-propanediol, 1,2-hexanediol, and butylene glycol; and the auxiliary phase includes phenoxyethanol and citric acid.

5. A method for manufacturing a composite facial mask containing Astragalus complanatus, characterized in that, The manufacturing method includes: A basic aqueous solution is prepared based on a thickening phase, a first moisturizing phase, and deionized water. In the aqueous base solution, a co-solvent phase, an active phase, and an auxiliary phase are added sequentially, and the mixture is stirred and homogenized to obtain a crude composite mask. The crude composite mask is filtered, tested, and filled to obtain the Astragalus complanatus composite mask.

6. The manufacturing method according to claim 5, characterized in that, The method for preparing an aqueous base solution based on a thickening phase, a first moisturizing phase, and deionized water includes: The thickening phase is added to deionized water, and the mixture is heated to a first temperature and stirred while maintaining the temperature. Then, the first moisturizing phase is added, and the mixture is stirred while maintaining the temperature until homogeneous to obtain the aqueous base solution. The thickening phase includes xanthan gum, polyacrylate crosspolymer-6, and allantoin, and the first moisturizing phase includes glycerin, sodium hyaluronate, and hydroxyethyl urea.

7. The manufacturing method according to claim 5, characterized in that, The method for obtaining a crude composite mask by sequentially adding a solubilizing phase, an active phase, and an auxiliary phase to the aqueous base solution and stirring to homogenize includes: The aqueous base solution is cooled to a second temperature, the co-solvent is added, and the mixture is kept warm and stirred. Then, the solution is cooled to a third temperature, the active phase is added, and the mixture is kept warm and stirred until homogeneous. After homogeneity, the auxiliary phase and the second moisturizing phase are added sequentially, and the mixture is kept warm and stirred until homogeneous. The pH is then adjusted to 5.5-6.

0. The co-solvent includes at least two of 1,3-propanediol, 1,2-hexanediol, and butanediol. The auxiliary phase includes phenoxyethanol and citric acid. The second moisturizing phase includes sodium PCA, glycine, and β-glucan.

8. The manufacturing method according to claim 5, characterized in that, The method for preparing the active phase includes: Solvents were added to extracts of Astragalus complanatus, Eucommia ulmoides leaves and Tremella fuciformis fruiting bodies, and the mixture was magnetically stirred at room temperature until completely dissolved. After standing and filtering, the supernatant was collected to obtain the first active mother liquor. Solvent was added to ergothioneine and magnetically stirred at room temperature until completely dissolved to obtain the second active mother liquor. The first and second active mother liquors were mixed with methyl diisopropyl propionamide and stirred until homogeneous in a water bath at 45°C-50°C to obtain the active phase.

9. The manufacturing method according to claim 6, characterized in that, The method of heating to the first temperature and then maintaining and stirring includes: Heat to 80℃-84℃ and homogenize for 2-3 minutes, then keep warm and stir at 300rpm-400rpm for 25-30 minutes.

10. The manufacturing method according to claim 7, characterized in that, The method of cooling the aqueous base solution to a second temperature, adding the co-solvent phase, and maintaining the temperature with stirring includes: The aqueous base solution is cooled to 65℃-70℃, and then the co-solvent is added. The solution is kept warm and stirred at 150rpm-200rpm for 5min-10min. The method of cooling to the third temperature, adding the active phase, and then maintaining the temperature with stirring includes: After cooling to 45℃-50℃, add the active phase and keep it warm and stirred at 150rpm-200rpm for 10min-15min.

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