CN112957302B

CN112957302B - Amino acid facial cleanser and preparation method thereof

Info

Publication number: CN112957302B
Application number: CN202110179948.8A
Authority: CN
Inventors: 王汪送; 廖忠华; 沈育松; 谢阿贵
Original assignee: Fujian Pientzehuang Cosmetics Co ltd
Current assignee: Fujian Pientzehuang Cosmetics Co ltd
Priority date: 2021-02-08
Filing date: 2021-02-08
Publication date: 2022-09-27
Anticipated expiration: 2041-02-08
Also published as: CN112957302A

Abstract

The invention belongs to the technical field of cosmetics, and particularly relates to amino acid facial cleanser and a preparation method thereof. The amino acid facial cleanser provided by the invention mainly comprises the following components in parts by weight: 7-20 parts of amino acid surfactant, 3-13 parts of auxiliary surfactant, 2-5 parts of thickening agent, 4-16 parts of humectant, 0.5-2 parts of pearling agent and 38.5-80.5 parts of water. The amino acid facial cleanser provided by the invention is close to the pH value of human skin, is safe and mild, and is skin-friendly and low in stimulation; the foam is rich and fine, and is high-efficiency and clean; moisten and nourish skin, and is fresh and tight.

Description

Amino acid facial cleanser and preparation method thereof

Technical Field

The invention belongs to the technical field of cosmetics, and particularly relates to amino acid facial cleanser and a preparation method thereof.

Background

The face cleansing cream on the market can be roughly divided into three types, namely a common surfactant type, a fatty acid salt type and an amino acid surfactant type according to the types of the surfactants.

The amino acid facial cleanser is a facial cleanser product which takes amino acid type surface activity as a main cleaning active ingredient, and the weakly acidic amino acid type surfactant is prepared from natural ingredients and is green and natural; the pH value is close to the human skin, and the pH value of the skin cannot be influenced; amino acid is a basic unit for forming protein, so that the product is mild and skin-friendly, has low irritation and proper cleaning capability, and is touted by consumers.

However, the amino acid facial cleanser is difficult to thicken, and the coating property and the foaming property of the facial cleanser are often influenced by adding the high molecular polymer for thickening, so that the amino acid facial cleanser is difficult to coat and melt in the using process, and the foaming time is long. The self-crystallizing thickening type amino acid facial cleanser has the problems of high stability such as alcohol precipitation, water yielding, layering and the like although the foaming is rapid and the foam is rich.

The two types of amino acid facial cleansers have respective defects, and the industrial application development of the amino acid facial cleansers is limited. This phenomenon is urgently to be solved.

Disclosure of Invention

The invention aims to provide an amino acid facial cleanser and a preparation method thereof. The amino acid facial cleanser provided by the invention has good stability; the pH value of the skin of a human body is within a proper range, so that the skin care liquid is safe and mild, is skin-friendly and has low stimulation; the foam is rich and fine, the cleaning is efficient, and the detergent is fresh and not tight after being washed.

The technical scheme of the invention is as follows:

an amino acid facial cleanser mainly comprises the following components in parts by weight: 7-20 parts of amino acid surfactant, 3-13 parts of auxiliary surfactant, 2-5 parts of thickening agent, 4-16 parts of humectant, 0.5-2 parts of pearling agent and 38.5-80.5 parts of water; the pH value of the amino acid facial cleanser is 5.5-7.5; the amino acid surfactant is potassium cocoyl glycinate, the auxiliary surfactant is cocamidopropyl hydroxysulfobetaine and decyl glucoside, the thickening agent is composed of acrylic acid (ester) copolymer and PEG-120 methyl glucose trioleate according to the weight ratio of 5:1, the humectant is glycerin, the pearling agent is ethylene glycol distearate, and the skin conditioner is yeast/rice fermentation product filtrate, dipotassium glycyrrhizinate, pseudo-ginseng, dendrobium officinale stem extract, polygonatum extract, poria cocos extract, radix scrophulariae extract and radix ophiopogonis extract.

Further, the amino acid facial cleanser mainly comprises the following components in parts by weight: 13.5 parts of amino acid surfactant, 8 parts of auxiliary surfactant, 3.5 parts of thickening agent, 10 parts of humectant, 1.5 parts of pearling agent and 59.5 parts of water.

Further, the amino acid surfactant is potassium cocoyl glycinate; the cosurfactants are cocamidopropyl hydroxysultaine and decyl glucoside.

Further, the humectant is glycerin.

Further, the pearlizing agent is ethylene glycol distearate.

Further, the skin conditioner is yeast/rice fermentation product filtrate and plant extract.

Further, the plant extract comprises dipotassium glycyrrhizinate, pseudo-ginseng, dendrobium officinale stem extract, polygonatum extract, poria cocos extract, radix scrophulariae extract and radix ophiopogonis extract.

Further, the thickening agent consists of acrylic acid (ester) copolymer and PEG-120 methyl glucose trioleate according to the weight ratio of 3: 1.

The preparation method of the amino acid facial cleanser comprises the following steps:

s1, adding the amino acid surfactant, the auxiliary surfactant and the humectant into an emulsifying cylinder, heating and stirring uniformly until the mixture is dissolved, and keeping the temperature and stirring for 10-30min when the temperature of the emulsifying cylinder reaches 70-90 ℃, so as to remove the foam in the solution;

s2, adding a pearling agent (ethylene glycol distearate) and an acrylic acid (ester) copolymer in a thickening agent into the mixed solution obtained in the step S1, keeping the temperature at 80-90 ℃, stirring for 15-25min, then opening a cooling system, and cooling to 60-75 ℃ while stirring;

s3, adding PEG-120 methyl glucose trioleate in a thickening agent into the mixture obtained in the step S2, keeping the temperature of 60-75 ℃, stirring for 10-15min, continuing to open a cooling system, and cooling to 45-50 ℃ while stirring;

s4 adding the skin conditioner, essence and antiseptic into the mixture obtained in step S3, keeping the temperature at 45-50 deg.C, stirring for 10-15min, continuing to open the cooling system, cooling to 35-42 deg.C while stirring, and stopping cooling to obtain a smooth and uniform body.

Further, the stirring speed in the step S1, the step S2, the step S3 and the step S4 is 10-35 r/min.

In the invention, the added amino acid surfactant potassium cocoyl glycinate and the auxiliary surfactant cocoamidopropyl hydroxysultaine and decyl glucoside have high safety, good foaming capacity, fine and elastic foam, and capability of mildly cleaning dirt and redundant grease on the face, and the skin is fresh and not tight after washing.

According to the amino acid facial cleanser provided by the invention, the humectant is glycerin, so that the amino acid facial cleanser has high hygroscopicity and good moisturizing effect.

The amino acid cleansing milk provided by the invention comprises yeast/rice fermentation product filtrate, plant extracts dipotassium glycyrrhizinate, pseudo-ginseng, dendrobium officinale stem extract, polygonatum extract, poria cocos extract, radix scrophulariae extract and radix ophiopogonis extract.

The amino acid facial cleanser provided by the invention has the advantages that the thickening agent is composed of acrylic acid (ester) copolymer and PEG-120 methyl glucose trioleate according to a certain proportion, the thickening agent is matched according to a proper proportion, the prepared facial cleanser is moderate in consistency, good in stability, easy to coat and use, good in foaming performance, fine and dense in foam, elastic, and fresh, smooth and tight in skin after washing.

Compared with the prior art, the amino acid facial cleanser provided by the invention has the following advantages:

(1) the amino acid facial cleanser provided by the invention has the advantages that the potassium cocoyl glycinate which is high in safety, mild and non-irritant is selected as the main surfactant, the cocoamidopropyl hydroxysulfobetaine and decyl glucoside are used as auxiliary agents, the pH value range of the human skin is suitable, dirt and redundant grease on the face are mildly cleaned, and the skin is fresh and tight after washing.

(2) The thickener component in the amino acid facial cleanser influences the difficulty of technological deaeration, the spreadability of the formula and the stability. According to the invention, the acrylic acid (ester) copolymer and PEG-120 methyl glucose trioleate are added in a proper proportion to form a thickening framework, so that the stability of the formula is ensured, the influence on the foam performance is minimized, and the fine and elastic foam is provided for the formula.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below, but the present invention is not limited thereto, and all other embodiments obtained by a person skilled in the art according to the basic idea of the present invention belong to the protection scope of the present invention.

The raw materials adopted in the invention are all commercially available cosmetic raw material products.

Example 1

The amino acid facial cleanser comprises the following components in parts by weight: 7 parts of amino acid surfactant potassium cocoyl glycinate, 3 parts of auxiliary surfactant cocoamidopropyl hydroxysulfobetaine and decyl glucoside, 2 parts of thickener acrylic acid (ester) copolymer and PEG-120 methyl glucose trioleate, 4 parts of humectant glycerol, 0.5 part of pearling agent ethylene glycol distearate, 1.5 parts of skin conditioner yeast/rice fermentation product filtrate, dipotassium glycyrrhizinate, pseudo-ginseng, dendrobium officinale stem extract, polygonatum extract, poria cocos extract, radix scrophulariae extract, radix ophiopogonis extract and 80.5 parts of water; the pH value of the amino acid facial cleanser is 6.7.

The thickening agent consists of acrylic acid (ester) copolymer and PEG-120 methyl glucose trioleate according to the weight ratio of 5: 1.

The skin conditioner consists of 0.05-0.5% of saccharomycete/rice fermentation product filtrate, 0.05-0.2% of dipotassium glycyrrhizinate, 0.0008-0.1% of pseudo-ginseng, 0.05-0.15% of dendrobium officinale stem extract, 0.05-0.15% of polygonatum odoratum extract, 0.05-0.15% of poria cocos extract, 0.05-0.15% of radix scrophulariae extract and 0.05-0.15% of radix ophiopogonis extract.

s1, adding the amino acid surfactant, the auxiliary surfactant and the humectant into an emulsifying cylinder, heating and stirring uniformly until the mixture is dissolved, and when the temperature of the emulsifying cylinder reaches 70-90 ℃, keeping the temperature and stirring for 10-30min to remove the foam in the solution;

s4, adding the skin conditioner, the essence and the preservative into the mixture obtained in the step S3, keeping the temperature at 45-50 ℃, stirring for 10-15min, continuing to open the cooling system, and cooling to 35-42 ℃ while stirring, and stopping cooling to form a smooth and uniform material body.

The stirring speed in the step S1, the step S2, the step S3 and the step S4 is 10 r/min.

Example 2

The amino acid facial cleanser comprises the following components in parts by weight: 13.5 parts of amino acid surfactant potassium cocoyl glycinate, 8 parts of auxiliary surfactant cocoamidopropyl hydroxy sulfobetaine and decyl glucoside, 3.5 parts of thickener acrylic acid (ester) copolymer and PEG-120 methyl glucose trioleate, 10 parts of humectant glycerin, 1.5 parts of pearling agent ethylene glycol distearate, 1.5 parts of skin conditioner yeast/rice fermentation product filtrate, dipotassium glycyrrhizinate, pseudo-ginseng, dendrobium officinale stem extract, polygonatum extract, poria cocos extract, radix scrophulariae extract and radix ophiopogonis extract and 59.5 parts of water; the pH value of the amino acid facial cleanser is 6.1.

The skin conditioner consists of 0.05-0.5% of saccharomycetes/rice fermentation product filtrate, 0.05-0.2% of dipotassium glycyrrhizinate, 0.0008-0.1% of pseudo-ginseng, 0.05-0.15% of dendrobium officinale stem extract, 0.05-0.15% of polygonatum odoratum extract, 0.05-0.15% of poria cocos extract, 0.05-0.15% of radix scrophulariae extract and 0.05-0.15% of radix ophiopogonis extract.

The stirring speed in the step S1, the step S2, the step S3 and the step S4 was 23 r/min.

Example 3

The amino acid facial cleanser comprises the following components in parts by weight: 20 parts of amino acid surfactant potassium cocoyl glycinate, 13 parts of auxiliary surfactant cocoamidopropyl hydroxysultaine and decyl glucoside, 5 parts of thickener acrylic acid (ester) copolymer and PEG-120 methyl glucose trioleate, 16 parts of humectant glycerol, 2 parts of pearling agent ethylene glycol distearate, 1.5 parts of skin conditioner yeast/rice fermentation product filtrate, dipotassium glycyrrhizinate, pseudo-ginseng, dendrobium officinale stem extract, polygonatum extract, poria cocos extract, radix scrophulariae extract and radix ophiopogonis extract and 38.5 parts of water; the pH value of the amino acid facial cleanser is 6.5.

The stirring speed in the step S1, the step S2, the step S3 and the step S4 was 45 r/min.

Example 4

The amino acid facial cleanser comprises the following components in parts by weight: 13.5 parts of amino acid surfactant potassium cocoyl glycinate, 8 parts of auxiliary surfactant cocoamidopropyl hydroxy sulfobetaine and decyl glucoside, 3.5 parts of thickener acrylate copolymer and PEG-120 methyl glucose trioleate, 10 parts of humectant glycerol, 1.5 parts of pearling agent ethylene glycol distearate and 62.62 parts of water; the pH value of the amino acid facial cleanser is 6.2.

s2, adding an acrylic acid (ester) copolymer in a pearling agent (ethylene glycol distearate) thickening agent into the mixed solution obtained in the step S1, keeping the temperature at 80-90 ℃, stirring for 15-25min, then opening a cooling system, and cooling to 60-75 ℃ while stirring;

s4, adding essence and preservative into the mixture obtained in the step S3, keeping the temperature at 45-50 ℃, stirring for 10-15min, continuing to open a cooling system, and cooling to 35-42 ℃ while stirring, and stopping cooling to form a smooth and uniform material body.

The stirring speed in the step S1, the step S2, the step S3 and the step S4 was 28 r/min.

Comparative example 1 an amino acid facial cleanser.

The formulation composition of the amino acid facial cleanser was similar to that of example 2.

s4 adding skin conditioner, essence, and antiseptic into the mixture obtained in step S3, stirring at 45-50 deg.C for 10-15min, continuing to open cooling system, and cooling to 35-42 deg.C under stirring to stop cooling.

The stirring speed in the step S1, the step S2, the step S3 and the step S4 was 6 r/min.

The difference from example 2 is that the stirring speed is reduced to 6 r/min.

Comparative example 2 an amino acid facial cleanser.

The difference from example 2 is that the stirring speed is increased to 45 r/min.

Comparative example 3 an amino acid facial cleanser.

s2, adding a pearling agent (ethylene glycol distearate) and an acrylic acid (ester) copolymer in a thickening agent into the mixed solution obtained in the step S1, keeping the temperature at 70 ℃, stirring for 15-25min, then opening a cooling system, and cooling to 60-75 ℃ while stirring;

The difference from example 2 is that the holding temperature of the pearling agent (ethylene glycol distearate) and the acrylic acid (ester) copolymer in the thickener in the step S2 is reduced to 70 ℃.

Comparative example 4 an amino acid facial cleanser.

The amino acid facial cleanser comprises the following components in parts by weight: 13.5 parts of amino acid surfactant potassium cocoyl glycinate, 3.5 parts of thickener acrylic acid (ester) copolymer and PEG-120 methyl glucose trioleate, 10 parts of humectant glycerol, 1.5 parts of pearling agent ethylene glycol distearate, 1.5 parts of skin conditioner yeast/rice fermentation product filtrate, 1.5 parts of dipotassium glycyrrhizinate, pseudo-ginseng, dendrobium officinale stem extract, polygonatum extract, poria extract, radix scrophulariae extract and radix ophiopogonis extract and 70.62 parts of water; the pH value of the amino acid facial cleanser is 7.1.

The amino acid facial cleanser was prepared in a similar manner to example 2.

The difference from example 2 is that the cosurfactants cocamidopropyl hydroxysultaine and decyl glucoside were not added.

Comparative example 5 an amino acid facial cleanser.

The amino acid facial cleanser comprises the following components in parts by weight: 13.5 parts of amino acid surfactant potassium cocoyl glycinate, 8 parts of auxiliary surfactant cocoamidopropyl hydroxysulfobetaine and decyl glucoside, 3.5 parts of thickener acrylic acid (ester) copolymer and PEG-120 methyl glucose trioleate, 10 parts of humectant glycerol, 1.5 parts of pearling agent ethylene glycol distearate, 1.5 parts of skin conditioner yeast/rice fermentation product filtrate, 1.5 parts of dipotassium glycyrrhizinate, pseudo-ginseng, dendrobium officinale stem extract, polygonatum extract, poria cocos extract, radix scrophulariae extract and radix ophiopogonis extract and 62.62 parts of water; the pH value of the amino acid facial cleanser is 6.0.

The thickening agent is prepared from acrylic acid (ester) copolymer and PEG-120 methyl glucose trioleate according to the weight ratio of 9: 1.

The preparation method of the amino acid facial cleanser is similar to that of the example 2.

The difference from example 2 is that the thickener consists of an acrylic acid (ester) copolymer and PEG-120 methyl glucose trioleate 9: 1.

Comparative example 6 an amino acid facial cleanser.

The amino acid facial cleanser consists of the following components in parts by weight: 13.5 parts of amino acid surfactant potassium cocoyl glycinate, 8 parts of auxiliary surfactant cocoamidopropyl hydroxysulfobetaine and decyl glucoside, 3.5 parts of thickener acrylic acid (ester) copolymer and PEG-120 methyl glucose trioleate, 10 parts of humectant glycerol, 1.5 parts of pearling agent ethylene glycol distearate, 1.5 parts of skin conditioner yeast/rice fermentation product filtrate, 1.5 parts of dipotassium glycyrrhizinate, pseudo-ginseng, dendrobium officinale stem extract, polygonatum extract, poria cocos extract, radix scrophulariae extract and radix ophiopogonis extract and 62.62 parts of water; the pH value of the amino acid facial cleanser is 6.7.

The thickening agent is prepared from acrylic acid (ester) copolymer and PEG-120 methyl glucose trioleate according to the weight ratio of 1: 1.

The amino acid facial cleanser was prepared in a similar manner to example 2.

The difference from example 2 is that the thickener consists of an acrylic acid (ester) copolymer and PEG-120 methyl glucose trioleate 1: 1.

Test example one, evaluation of the preparation method.

The preparation method comprises the following steps: in the preparation process, each operation step is observed, and abnormal conditions occurring in the operation process are recorded.

And (3) test results: the results are shown in Table 1

Table 1 amino acid facial cleanser preparation method results

It can be seen from the above table that the proper conditions of stirring speed and heat preservation temperature are the key to obtain a fine, smooth and non-obvious foam sample, and the condition of too low stirring speed or too low heat preservation temperature makes the acrylic acid (ester) copolymer as the thickening agent difficult to completely disperse, resulting in a transparent granular product; the stirring speed is too high, a large amount of foam of a product is difficult to remove in the preparation process, and finally a large amount of foam and unsmooth paste of a sample are caused.

Test example two safety test.

The safety evaluation method comprises the following steps: multiple (acute) skin irritation tests.

And (3) test results: the results are shown in Table 2

Table 2 amino acid facial cleanser safety test results

As can be seen from the above table, the formula of the face cleansers of examples 1-3 is highly safe, and has safe, mild and low-irritation characteristics under the condition that no soothing components such as dipotassium glycyrrhizinate are added by taking potassium cocoyl glycinate as a main surfactant and matching with appropriate cocoamidopropyl hydroxy sulfobetaine and decyl glucoside auxiliary surfactants.

Third test example, physical and chemical Properties test

The appearance evaluation method comprises the following steps: a proper amount of sample is squeezed on clean white paper, 30 volunteers are smeared and spread by hands, and the color and the state of the sample are evaluated.

pH test method: the sample was diluted with deionized water to 10% by mass by the dilution method, and the test was performed with a pH meter.

Viscosity test method: about 200ml of sample is put into a 250ml beaker and placed in a water bath at 25.0 ℃ for 1h, and the temperature of the material body is actually measured to be 25 +/-0.2 ℃. The viscosity measurements were then performed using BROOKFIELD DV-1VISCOMETER at 100rpm with 7# rotor.

And (3) test results: the results are shown in Table 3

TABLE 3 results of testing physicochemical Properties of amino acid face wash

As can be seen from the above table, examples 1-4 and comparative examples 4-6 are all milky in appearance, with a pH in the range of 5.5-7.5. The formula sample in the example 2 is fine and easy to coat and dissolve, and compared with the formula sample in the example 2, the formula sample in the comparative example 4 is not added with the cosurfactant of cocamidopropyl hydroxysultaine and decyl glucoside, the coating and spreading performance of the formula sample is obviously reduced, and the coating and spreading performance is difficult to apply and spread when the formula sample is used. Comparative example 5 the proportion of acrylic acid (ester) copolymer in the thickener was increased compared to example 2, and the spreadability of the coating sample was significantly reduced. Comparative example 6 the proportion of PEG-120 methyl glucose trioleate in the thickener was increased relative to example 2, and the formula sample had a certain pectin feel and was difficult to spread.

Test example four, stability test.

The stability test method comprises the following steps: taking about 30g of the facial cleanser samples obtained in the examples 1-4 and the comparative examples 4-6 in a 50ml transparent inspection bottle, placing the bottle in an oven at 45 +/-1 ℃ for 3 months, and observing the appearance of the sample after the temperature is restored to room temperature so as to detect the heat resistance of the sample; placing in a high-low temperature alternating test chamber at (48 +/-1 ℃) to (-15 +/-1 ℃) for 1 month, and observing the appearance of the sample after the sample is restored to the room temperature so as to detect the cold-heat exchange resistance of the sample; and placing the sample in an oven with the temperature of-10 +/-1 ℃ for 3 months, and observing the appearance of the sample after the sample is restored to the room temperature so as to detect the cold resistance of the sample.

And (3) test results: the results are shown in Table 4

Table 4 stability test results of amino acid face wash

Item

Example 1

Example 2

Example 3

Example 4

Comparative example 4

Comparative example 5

Comparative example 6

Heat resistance

Is normal

Is normal and normal

Is normal

Alternating cold and hot

Is normal

Is normal and normal

Is normal

Cold-resistant

Is normal

Is normal and normal

As can be seen from the above table, examples 1 to 4 and comparative examples 4 to 6 are all normal in heat resistance, cold and hot alternation, and cold resistance, and have good stability.

Test example five evaluation of skin feel

Skin feel evaluation method: 30 volunteers were selected to perform facial cleansing using the same method using the formula samples of example 2 and comparative examples 4-6, respectively. Wetting the face with clear water, spreading a proper amount of the product on the palm, adding a small amount of clear water to gently knead the palm, beating out abundant foam, finely kneading the face to clean, and then washing with clear water. And (4) after face cleaning is finished, filling out a mark on a trial questionnaire, wherein a 7-point system is adopted, and the higher the mark is, the better the satisfaction is. The evaluation indexes include the preference of the appearance of the paste, the preference of the thickness of the paste, the preference of the foam during application, the cleanliness of rinsing, the preference of the skin feeling after rinsing, and the overall evaluation

And (3) test results: the results are shown in Table 5

TABLE 5 skin feel evaluation results

Item	Example 2	Comparative example 4	Comparative example 5	Comparative example 6
					Preference of appearance of paste	5.6	5.0	5.5	5.3
Preference for thickness of paste	5.5	5.2	5.4	5.5
					Foam preference during application	5.5	4.5	4.9	5.0
Cleanliness of rinsing	5.8	5.0	5.0	5.5
					Skin feel preference after rinsing	5.7	4.0	5.1	5.3
General evaluation	5.8	4.5	5.0	5.0

As can be seen from the results of the trial skin feel evaluation of the volunteers in Table 5, the amino acid facial cleanser prepared in example 2 is superior in foaming property, cleansing effect and skin feel after use. The cleansing milk of comparative example 4 did not contain the appropriate co-surfactants cocamidopropyl hydroxysultaine and decyl glucoside, resulting in a significant reduction in lather, lather richness, and lather resiliency. The facial cleansers of comparative example 5 and comparative example 6 increase the ratio of acrylic acid (ester) copolymer, PEG-120 methyl glucose trioleate in the thickener, respectively, and the foaming performance, cleansing effect and skin feel in use are all in adverse directions.

The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can make appropriate modifications or improvements within the technical scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. The amino acid facial cleanser is characterized by mainly comprising the following components in parts by weight: 7-20 parts of amino acid surfactant, 3-13 parts of auxiliary surfactant, 2-5 parts of thickening agent, 4-16 parts of humectant, 0.5-2 parts of pearling agent and 38.5-80.5 parts of water; the pH value of the amino acid facial cleanser is 5.5-7.5;

the amino acid surfactant is potassium cocoyl glycinate, the auxiliary surfactant is cocamidopropyl hydroxysulfobetaine and decyl glucoside, the thickening agent is composed of acrylate copolymer and PEG-120 methyl glucose trioleate according to the weight ratio of 5:1, the humectant is glycerin, the pearling agent is ethylene glycol distearate, and the skin conditioner is yeast/rice fermentation product filtrate, dipotassium glycyrrhizinate, pseudo-ginseng, dendrobium officinale stem extract, polygonatum extract, poria cocos extract, radix scrophulariae extract and radix ophiopogonis extract.

2. The amino acid facial cleanser of claim 1, which is mainly composed of the following components in parts by weight: 13.5 parts of amino acid surfactant, 8 parts of auxiliary surfactant, 3.5 parts of thickening agent, 10 parts of humectant, 1.5 parts of pearling agent and 59.5 parts of water.

3. The method for preparing the amino acid facial cleanser according to any one of claims 1 to 2, comprising the steps of:

s2, adding pearling agent ethylene glycol distearate and acrylate copolymer in the thickening agent into the mixed solution obtained in the step S1, keeping the temperature at 80-90 ℃, stirring for 15-25min, then opening a cooling system, and cooling to 60-75 ℃ while stirring;

4. The method for preparing amino acid facial cleanser of claim 3, wherein the stirring rate in step S1, step S2, step S3 and step S4 is 10-35 r/min.