Western pear fruit extract, preparation method thereof and skin care composition containing western pear fruit extract

Abstract

The invention relates to an American pear fruit extract, a preparation method thereof and a skin care composition containing the American pear fruit extract. The preparation method of the pear extract comprises the following steps: S1, cleaning pears, drying, carrying out superfine grinding to enable the pears to pass through a 100-mesh sieve, adding a propylene glycol / propyl alcohol aqueous solution, uniformly mixing, and filtering to obtain pear filtrate; s2, adding a composite biological enzyme into the western pear fruit filtrate for enzymolysis, and performing enzyme deactivation to obtain an enzymatic hydrolysate; and S3, uniformly mixing the enzymatic hydrolysate with an extraction solvent, extracting by using an ultrasonic extraction method, and filtering to obtain a separation liquid which is the western pear fruit extract. The prepared western pear fruit extract, PCA zinc and PCA sodium are combined and matched, the obtained skin care composition can achieve the oil control and moisturizing effect of 1 + 1 + 1 > 3, long-term oil control is achieved, and water-oil balance of skin is achieved.

Description

Technical Field

[0001] The present invention belongs to the field of daily chemicals, and particularly relates to an extract of Pyrus communis fruit, a preparation method thereof, and a skin care composition containing the same. Background Art

[0002] With the diversification of modern social lifestyles, human skin problems have become increasingly complex. Among them, problems such as enlarged pores, roughness, and oil accumulation caused by excessive sebum secretion in oily skin are particularly common. Research shows that the formation of oily skin is closely related to various factors such as hormonal level fluctuations (such as unstable hormonal levels during puberty or hormonal level disorders caused by certain diseases or drugs), unbalanced diet structures (long-term consumption of greasy, spicy foods or high-sugar and high-fat intake), environmental factors (high temperature and humidity, electronic radiation), and genetics. Current nursing methods for oily skin mostly rely on frequent cleansing or oil-control ingredients, but excessive cleansing easily damages the skin barrier function, leading to increased water loss and forming a vicious cycle of "oily outside and dry inside". Therefore, it is particularly necessary to develop a natural active ingredient composition with both oil-control, moisturizing, and barrier-strengthening functions.

[0003] Pyrus communis L. is produced in Europe and western Asia and belongs to the Rosaceae family. It is rich in phenolic substances, including chlorogenic acid, gentisic acid, syringic acid, vanillic acid, coumaric acid, ferulic acid, 5-caffeoylquinic acid, catechin, epicatechin, isorhamnetin, quercetin, kaempferol, anthocyanins (red pear varieties), and arbutin, etc. These phenolic substances have significant physiological activities of antioxidant, anti-inflammatory, and regulating lipid metabolism. It has been found that the content and distribution characteristics of phenolic substances in the peel, core, and pulp of Pyrus communis fruit are also different. The contents of arbutin and chlorogenic acid are higher in the peel and core, and lower in the pulp; the contents of total flavonoids and total phenols also show a distribution trend of "peel > core > pulp". These phenolic substances can reduce oil secretion by inhibiting the lipid peroxidation reaction of sebaceous glands and regulating the activity of cyclooxygenase. At the same time, their moisturizing properties can relieve skin dryness after cleansing. Developing an oil-control and moisturizing composition based on the characteristics of Pyrus communis fruit extract has important application value.

[0004] Disclosing the information of this background art section is only intended to increase the understanding of the overall background of the present invention, and is not necessarily regarded as an admission or an indication in any form that this information constitutes the prior art already known to those of ordinary skill in the art. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a preparation method of an extract of Pyrus communis fruit. By combining the extract of Pyrus communis fruit prepared by the present invention with zinc PCA and sodium PCA, the obtained skin care composition can achieve an oil-control and moisturizing effect of 1 + 1 + 1 > 3, realize long-term oil control, and make the skin reach a water-oil balance.

[0006] The technical solution adopted by the present invention to solve the above problems is as follows:

[0007] A method for preparing a Chinese pear fruit extract, comprising the following steps:

[0008] S1. Wash and dry the Chinese pear fruit, ultramicro pulverize it to pass through a 100-mesh sieve, add a propylene glycol / propyl alcohol aqueous solution, mix evenly and then filter to obtain a Chinese pear fruit filtrate;

[0009] S2. Add a composite bio-enzyme to the Chinese pear fruit filtrate for enzymatic hydrolysis, and obtain an enzymatic hydrolysate after inactivating the enzyme;

[0010] S3. Mix the enzymatic hydrolysate with an extraction solvent evenly, perform extraction using ultrasonic extraction method, filter to obtain a separation liquid, and the separation liquid is the Chinese pear fruit extract.

[0011] Preferably, in step S1, the propylene glycol / propyl alcohol solution is a 30 vol% - 45 vol% propylene glycol / propyl alcohol aqueous solution.

[0012] Preferably, the mass ratio of the Chinese pear fruit to the propylene glycol / propyl alcohol solution is (2.5 - 3):1.

[0013] Preferably, in step S2, the composite bio-enzyme is cellulase, phospholipase and transglycosidase; the addition amount of the composite bio-enzyme is 0.3% - 3.0% of the weight of the Chinese pear fruit filtrate.

[0014] Preferably, the weight ratio of the cellulase, phospholipase and transglycosidase is 2:(1 - 2):(1 - 2).

[0015] Preferably, in step S2, the conditions for the enzymatic hydrolysis include a pH of 5.5 - 6.5 and a temperature of 50 - 65 °C.

[0016] Preferably, in step S2, the steps for inactivating the enzyme include: rapidly heating to 90 °C - 100 °C for rapid inactivation for 1 minute after enzymatic hydrolysis, and cooling to 50 - 65 °C.

[0017] Preferably, in step S3, the addition amount of the extraction solvent is 80% - 85% of the weight of the enzymatic hydrolysate.

[0018] Preferably, in step S3, the extraction solvent is an alcohol solution.

[0019] Preferably, in step S3, the specific steps for ultrasonic extraction include: inputting the enzymatic hydrolysate from the feed port of the ultrasonic extractor into the extraction tube, and at the same time inputting the extraction solvent heated from the slag discharge end of the ultrasonic extractor into the extraction tube, and performing countercurrent ultrasonic extraction under normal pressure in the extraction tube.

[0020] A skin care composition containing extracts of Pyrus communis L. fruit, comprising the following raw materials for preparation by weight percentage:

[0021] (A) 2% - 10% of the above-mentioned extracts of Pyrus communis L. fruit;

[0022] (B) 0.1% - 0.5% of zinc PCA;

[0023] (C) 0.1% - 0.5% of sodium PCA;

[0024] (D) 2% - 10% of a humectant;

[0025] (E) 0.5% - 10% of an emulsifier;

[0026] (F) 1% - 15% of an oil;

[0027] (G) 0.05% - 2% of a thickener;

[0028] (H) 0.01% - 0.4% of a neutralizer;

[0029] (I) 0.01% - 1% of a preservative;

[0030] (J) Make up to 100% with pure water.

[0031] In the above technical solution, the zinc PCA is a component with multiple skin care effects; firstly, it has the functions of controlling oil and treating acne, and can effectively reduce the excessive secretion of sebum by controlling the secretion of sebum by sebaceous glands, so as to achieve the effects of treating acne and removing blackheads; secondly, zinc PCA can also inhibit the proliferation of Propionibacterium acnes, reduce the activity of lipase and play an antioxidant role, reduce irritation, soothe inflammation and prevent the formation of acne. Sebum itself has the important functions of maintaining the skin barrier and protecting the flexibility of hair, but when the secretion is unbalanced, excessive sebum not only causes a shiny face, but also creates conditions for the reproduction of microorganisms, leading to follicular inflammatory reactions. The sodium PCA is a natural moisturizing factor, an amino acid derivative, with strong hygroscopicity, and can absorb moisture from the air, and its moisturizing performance is significantly better than that of conventional polyols. In addition to basic moisturization, sodium PCA can also enhance lipid function, improve skin barrier function, and at the same time has antistatic properties, playing multiple conditioning roles in the cosmetic system.

[0032] Preferably, the humectant is one or any combination of two of glycerol, glycerol polyethers, urea, hyaluronic acid, and betaine. Glycerol is a commonly used humectant, which is relatively mild and has no obvious irritation to the body, and has the effect of moisturizing and nourishing. The role of the humectant is to form a thin film on the skin surface to seal the moisture in the skin to prevent moisture evaporation, and at the same time prevent the skin from absorbing moisture in the air, so as to maintain the appropriate humidity of the skin. Allantoin and sodium hyaluronate are also the most commonly used humectants in skin care cosmetics. The humectant is used to simulate the natural moisturizing system composed of oil, water, and NMF in human skin, and its role is to delay moisture loss and increase the moisture penetration of the dermis-epidermis. Provide temporary protection for the skin, reduce damage, and promote the repair process.

[0033] Preferably, the emulsifier is at least one of polyol fatty acid esters, lecithin, fatty alcohol polyoxyethylene ethers, and polyglycerol fatty acid esters. An emulsifier is a substance that forms a stable emulsion of a mixed liquid of two or more immiscible components. Its principle of action is that in the emulsification process, the dispersed phase is dispersed in the continuous phase in the form of microdroplets (micrometer level). The emulsifier reduces the interfacial tension of each component in the mixed system and forms a relatively firm film on the surface of the microdroplets, or forms an electric double layer on the surface of the microdroplets due to the charge given by the emulsifier, preventing the microdroplets from aggregating with each other and maintaining a uniform emulsion.

[0034] Preferably, the oil and fat is at least one of fatty acid glycerides, waxes, fatty alcohols, phospholipids, and vegetable oils. Oil and fat are the general terms for oil and fat. Oil is unsaturated higher fatty acid, and fat is saturated higher fatty acid glyceride. Its role is to form a thin film on the skin surface, which can keep the skin moist and shiny, and can also isolate the air to avoid chemical reactions between some substances and the components in the air.

[0035] Preferably, the thickener is at least one of carbomers, acrylic acids, and cellulose derivatives. The thickener can increase the viscosity of the system, keep the system in a uniform and stable suspension state or emulsion state, or form a gel or mucus; most thickeners have an emulsifying effect at the same time.

[0036] Preferably, the preservative is at least one of sym-xenone, hexylene glycol, and sodium benzoate. The role of the preservative is to interfere with the enzyme system of microorganisms, destroy their normal metabolism, inhibit the activity of enzymes, cause the proteins of microorganisms to coagulate and denature, and interfere with their survival and reproduction. It is to change the permeability of the cytoplasmic membrane, inhibit the enzymes and metabolites in their bodies from being excreted, and cause them to inactivate. The role of preservatives in cosmetics is to avoid the generation of colonies such as Escherichia coli, Staphylococcus aureus, Pseudomonas aeruginosa, molds, and yeasts that are heat-resistant.

[0037] A method for preparing a skin care composition containing extracts of Pyrus communis fruits, comprising the following steps:

[0038] (1) Preparation of oil phase: Mix the emulsifier and oil, and dissolve them by heating in a water bath.

[0039] (2) Preparation of water phase: Mix the humectant, thickener and hot water, keep it warm in a water bath for 15 min and then homogenize.

[0040] (3) Mix the homogenized water phase with the dissolved oil phase and homogenize again. After homogenizing evenly, add the thickener and continue to homogenize. After homogenizing evenly, cool it to room temperature while stirring.

[0041] (4) After cooling, add the neutralizer to adjust the pH value to 5.5 - 6.5. Add the preservative, Pyrus communis fruit extract, zinc PCA and sodium PCA in sequence, stir evenly and then make up with pure water, and then it is ready for discharging.

[0042] Preferably, the neutralizer is sodium hydroxide.

[0043] The present invention has the following beneficial effects:

[0044] The present invention uses the enzyme extraction method and ultrasonic-assisted extraction method to prepare and extract the Pyrus communis fruit extract, which can greatly shorten the extraction time and improve the extraction efficiency, ensure thorough extraction, and obtain an extract with a relatively high purity. The preparation method of the Pyrus communis fruit extract of the present invention has the advantages of high efficiency, safety, environmental protection, etc., with a simple process and easy operation, and does not affect the structure and activity of the extract, and can maximize the retention of the biological activity of the active ingredients. The obtained extraction liquid has few impurities and the active ingredients are easy to separate and purify.

[0045] The present invention adds the obtained Pyrus communis fruit extract, zinc PCA and sodium PCA into the cream to form a skin care composition. Through the reasonable collocation of the dosage of each component and the optimization of the process, a skin care composition with the effects of oil control, moisturizing, soothing and improving skin barrier is developed. Pyrus communis fruit can reduce oil secretion by inhibiting the lipid peroxidation reaction of sebaceous glands and regulating the activity of cyclooxygenase. Zinc PCA also has the effect of oil control, and can remove blackheads while controlling oil, and inhibit the formation of acne by inhibiting colonies such as Propionibacterium acnes. However, simply controlling oil without moisturizing will cause the skin to be too dry, while sodium PCA is a natural component in the skin, has strong hygroscopicity, can absorb moisture in the air, and has stronger moisturizing power than polyols. Therefore, the skin care composition of the present invention can carry out antioxidant and oil control and moisturizing effects while regulating sebum secretion, can control the sebaceous glands to secrete oil to remove acne, blackheads, inhibit Propionibacterium acnes, lipase and oxidation, thereby reducing irritation, soothing inflammation and preventing the formation of acne. Detailed implementation mode

[0046] To make the technical problems, technical solutions, and technical advantages to be solved by the present invention clearer, the following will be described in detail with specific examples. However, the protection scope of the present invention is not limited to the following specific embodiments. The described embodiments are only a part of the embodiments of the present invention, rather than all embodiments, and even less a limitation of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the protection scope of the present invention. Unless otherwise defined, all professional terms used hereinafter have the same meaning as commonly understood by those skilled in the art. The professional terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the protection scope of the present invention. Unless otherwise specifically stated, various raw materials, reagents, instruments, and equipment used in the present invention can be obtained through market purchases or can be prepared by existing methods.

[0047] A method for preparing a extract of Pyrus communis L. fruit, comprising the following steps:

[0048] S1. Wash and dry the Pyrus communis L. fruit, and perform ultrafine pulverization so that it can pass through a 100-mesh sieve. Add a propylene glycol / propyl alcohol aqueous solution, mix evenly and then filter to obtain a filtrate of Pyrus communis L. fruit;

[0049] S2. Add a composite bio-enzyme to the filtrate of Pyrus communis L. fruit for enzymatic hydrolysis. After enzymatic hydrolysis for 2 h, quickly raise the temperature to 100 °C for rapid inactivation for 1 minute, and then cool down to 50 - 65 °C to obtain an enzymatic hydrolysate;

[0050] S3. Input the enzymatic hydrolysate into the extraction tube from the feed port of the ultrasonic extractor, and at the same time input the extraction solvent into the extraction tube from the slag discharge end of the ultrasonic extractor after heating. Perform countercurrent ultrasonic extraction under normal pressure in the extraction tube for 60 min, and filter to obtain a separation liquid, which is the extract of Pyrus communis L. fruit.

[0051] Specifically, in step S1, the propylene glycol / propyl alcohol solution is a 40 vol% propylene glycol / propyl alcohol aqueous solution.

[0052] Specifically, the ratio of the Pyrus communis L. fruit to the propylene glycol / propyl alcohol solution is 3:1.

[0053] Specifically, in step S2, the composite bio-enzyme is cellulase, phospholipase, and transglucosidase; the addition amount of the composite bio-enzyme is 2.0% of the weight of the filtrate of Pyrus communis L. fruit.

[0054] Specifically, the weight ratio of the cellulase, phospholipase, and transglucosidase is 2:1.5:1.5.

[0055] Specifically, in step S2, the conditions for the enzymatic hydrolysis include a pH of 5.5 - 6.5 and a temperature of 50 - 65 °C.

[0056] Specifically, in step S3, the extraction solvent is ethanol; the addition amount of the ethanol is 80% of the weight of the enzymatic hydrolysate.

[0057] Examples 1 to 4 respectively provide a skin care composition containing extracts of Pyrus communis L. fruits, and the dosage formulations of the respective raw materials for preparation are shown in the following table.

[0058] Table 1:

[0059] Raw material components Phase type Example 1 Example 2 Example 3 Example 4 Water A Add up to 100 Add up to 100 Add up to 100 Add up to 100 Polyol A 5 5 5 5 Chelating agent A 0.03 0.03 0.03 0.03 Xanthan gum A 0.05 0.05 0.05 0.05 Acrylic acid A 0.2 0.2 0.2 0.2 Hydrogenated coconut oil glycerides B 1 1 1 1 Caprylic / capric triglyceride B 2 2 2 2 Cetearyl alcohol B 1.5 1.5 1.5 1.5 Polydimethylsiloxane B 3 3 3 3 Natural fatty alcohol B 0.5 0.5 0.5 0.5 Shea butter B 0.8 0.8 0.8 0.8 Camellia seed oil B 2.5 2.5 2.5 2.5 Sodium acrylate C 0.3 0.3 0.3 0.3 Sodium hydroxide D 0.04 0.04 0.04 0.04 Preservative E 0.8 0.8 0.8 0.8 PCA zinc F 0.3 0.3 0.3 0.3 PCA sodium F 0.3 0.3 0.3 0.3 Pear fruit extract F 2 5 8 10

[0060] Comparative Examples 1 to 7 respectively provide a skin care composition, and the dosage formulations of the respective raw materials for preparation are shown in the following table.

[0061] Table 2:

[0062]

[0063]

[0064] The preparation methods of the skin care compositions of the above-mentioned examples and comparative examples are as follows:

[0065] Weigh the substances in phase A into a beaker, stir and mix evenly, and place it in a water bath to heat up to 78 ± 2 °C; weigh the substances in phase B into another beaker, and place it in a water bath to heat up to 78 ± 2 °C until there are no undissolved particles in the oily liquid; homogenize the substances in phase A until it becomes a gel-like state without unhomogenized mixture, add the dissolved phase B, and after homogenizing evenly, add phase C until the emulsion is uniform; cool the mixer to 50 - 55 °C, then add the substances in phase D, sequentially add the substances in phase E and phase F, stir evenly, add pure water to 100%, and stop stirring when the temperature drops below 35 °C to discharge the product.

[0066] Perform instrumental efficacy evaluation on the above 11 cream skin care compositions. Randomly select 352 volunteers with oily skin, divide them into 11 groups on average, and each group corresponds to any one of the examples or comparative examples for a one-month efficacy test. Through the moisture content change rate, skin oil change rate, consumer oil control effect score (effective), and consumer moisturizing effect score (effective), the average results shown in Table 3 are finally obtained.

[0067] The moisture content change rate is as follows: After using the product for one month, if the moisture content of the stratum corneum in the test area shows a significant increase, it indicates that the test sample has a moisturizing effect; after using the product for one month, if there is no significant difference or a significant decrease in the moisture content of the stratum corneum in the test area, it indicates that the test sample does not have a moisturizing effect.

[0068] The skin oil change rate: After using the product for one month, if the water content of the stratum corneum in the test area shows a significant increase, it indicates that the tested sample has a moisturizing effect; compared with the control area, if there is a significant difference in the difference in sebum measurement values in the sample application area, it indicates that the tested sample has an oil control effect. After using the product for one month, if there is no significant difference or a significant decrease in the water content of the stratum corneum in the test area, it indicates that the tested sample does not have a moisturizing effect; compared with the control area, if there is a significant difference in the difference in sebum measurement values in the sample application area, it indicates that the tested sample does not have an oil control effect.

[0069] Table 3:

[0070]

[0071] From the above instrument efficacy evaluation results and volunteer test results, it can be concluded that zinc PCA, sodium PCA and extracts of Pyrus communis L. fruit have a synergistic effect. Pyrus communis L. fruit can reduce sebum secretion by inhibiting lipid peroxidation reaction of sebaceous glands and regulating the activity of cyclooxygenase and other pathways. Zinc PCA also has an oil control effect, and can remove blackheads while controlling oil, and inhibit the growth of colonies such as Propionibacterium acnes to prevent the formation of acne. However, simply controlling oil without moisturizing will cause the skin to be too dry. Sodium PCA is a natural component in the skin, has strong hygroscopicity, can absorb moisture in the air, and has stronger moisturizing power than polyols.

[0072] Compared with the skin care compositions of Comparative Examples 1-7, the skin care compositions of Examples 1-4 can, while regulating sebum secretion, also have antioxidant effects and oil control and moisturizing effects, can control the sebaceous glands to secrete oil to remove acne, blackheads, inhibit Propionibacterium acnes, lipase and oxidation, thereby reducing irritation, soothing inflammation and preventing the formation of acne. From Comparative Examples 1-7, it can be seen that if any one of zinc PCA, sodium PCA and extracts of Pyrus communis L. fruit in the skin care composition is removed, it will have a great impact on the oil control and moisturizing effects of the skin care composition. When 0.5% of zinc PCA, 0.5% of sodium PCA and 8% of extracts of Pyrus communis L. fruit are added to the skin care composition of the present invention, an oil control and moisturizing effect of 1+1+1>3 can be achieved.

[0073] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solutions of the present invention, and these simple modifications all belong to the protection scope of the present invention.

[0074] In addition, it should be noted that, in the case of no contradiction, the various specific technical features described in the above specific embodiments can be combined in any appropriate manner. To avoid unnecessary repetition, the present invention will not separately describe various possible combination methods.

[0075] In addition, any combination can be made among various different embodiments of the present invention, as long as it does not violate the idea of the present invention, and it should equally be regarded as the content disclosed by the present invention.

Claims

1. A method for preparing a pear fruit extract, characterized in that: The steps include: S1. The pear fruit was washed, dried, ultrafinely crushed to pass through a 100-mesh sieve, propylene glycol / propyl alcohol aqueous solution was added, mixed and filtered to obtain a pear fruit filtrate; S2. Adding a composite biological enzyme to the pear fruit filtrate for enzymolysis, and obtaining an enzymolysis solution after inactivating the enzyme; S3. The enzymatic hydrolysate is mixed evenly with the extraction solvent, extracted by ultrasonic extraction, and filtered to obtain a separated liquid, which is the pear fruit extract.

2. The method for preparing the pear fruit extract according to claim 1, characterized in that: In step S1, the propylene glycol / propyl alcohol solution is a 30 vol% to 45 vol% propylene glycol / propyl alcohol aqueous solution; the mass ratio of the pear fruit to the propylene glycol / propyl alcohol solution is (2.5 to 3):

1.

3. The method for preparing the pear fruit extract according to claim 1, characterized in that: In step S2, the composite biological enzyme is cellulase, phospholipase and transglycosidase; the weight ratio of the cellulase, phospholipase and transglycosidase is 2:(1-2):(1-2); the added amount of the composite biological enzyme is 0.3% to 3.0% of the weight of the pear fruit filtrate.

4. The method for preparing the pear fruit extract according to claim 1, characterized in that: In step S2, the conditions for the enzymatic hydrolysis include a pH of 5.5 to 6.5 and a temperature of 50 to 65°C.

5. The method for preparing the pear fruit extract according to claim 1, characterized in that: In step S2, the enzyme inactivation step includes: rapidly heating to 90°C to 100°C for rapid inactivation for 1 minute after enzymatic hydrolysis, and then cooling to 50 to 65°C.

6. The method for preparing the pear fruit extract according to claim 1, characterized in that: In step S3, the amount of the extraction solvent added is 80% to 85% of the weight of the enzymatic hydrolyzate.

7. The method for preparing the pear fruit extract according to claim 1, characterized in that: In step S3, the specific steps of the ultrasonic extraction include: inputting the enzymatic hydrolyzate into the extraction tube from the feed port of the ultrasonic extractor, and simultaneously inputting the extraction solvent into the extraction tube from the slag discharge end of the ultrasonic extractor after heating, and performing countercurrent ultrasonic extraction under normal pressure in the extraction tube.

8. A pear fruit extract prepared by the preparation method according to any one of claims 1 to 7.

9. A skin care composition, characterized in that The preparation comprises the following raw materials by weight percentage: (A) 2% to 10% of the pear fruit extract according to claim 8; (B) PCA zinc 0.1% to 0.5%; (C) PCA sodium 0.1% to 0.5%; (D) humectant 2% to 10%; (E) emulsifier 0.5% to 10%; (F) Oil 1% to 15%; (G) thickener 0.05% to 2%; (H) neutralizing agent 0.01% to 0.4%; (I) preservatives 0.01% to 1%; (J) Make up to 100% with pure water.

10. The skin care composition according to claim 9, characterized in that The preparation method comprises the following steps: (1) Preparation of oil phase: Mix the emulsifier and oil and heat in a water bath to dissolve; (2) Preparation of water phase: Mix the moisturizer, thickener and hot water, keep in a water bath for 15 min and then homogenize; (3) mixing the homogenized water phase and the dissolved oil phase, adding a thickener and continuing to homogenize after homogenization, and cooling to room temperature while stirring after homogenization; (4) After cooling, add a neutralizer to adjust the pH value to 5.5-6.5, add preservatives, pear fruit extract, PCA zinc, and PCA sodium in sequence, stir evenly, add pure water, and then discharge.

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