CN115154390A

CN115154390A - Anti-dandruff oil-control shampoo

Info

Publication number: CN115154390A
Application number: CN202211028154.2A
Authority: CN
Inventors: 张飞
Original assignee: Guangdong Juxintang Pharmaceutical Biotechnology Co ltd
Current assignee: Guangdong Juxintang Pharmaceutical Biotechnology Co ltd
Priority date: 2022-08-25
Filing date: 2022-08-25
Publication date: 2022-10-11
Anticipated expiration: 2042-08-25
Also published as: CN115154390B

Abstract

The invention relates to the field of washing and caring products, and particularly discloses a dandruff-removing and oil-controlling shampoo, which comprises the following components: solvent, surfactant, humectant, hair conditioner, antiseptic, aromatic, pearling agent, thickener, suspending agent, pH regulator, chelating agent, dandruff removing agent, and hair conditioner at least including fructus Cnidii extract, lactobacillus/soybean milk fermentation product filtrate, and radix Ipomoeae juice. The invention has the advantages of prolonging the effects of removing dandruff and controlling oil.

Description

Dandruff-removing oil-controlling shampoo

Technical Field

The invention relates to the field of washing and caring products, in particular to an anti-dandruff oil-control shampoo.

Background

The shampoo is the most widely used shampoo, and is mainly used for cleaning grease, sweat stain, cells, dust, microorganisms, residues and the like attached to the scalp and hair, removing bad smell and keeping the scalp and hair clean and beautiful.

Dandruff is a product of metabolism of epidermal cells of human head, is a keratinization process of the epidermal cells of the head, and the stratum corneum is particularly easy to fall off in a dry state, so that the phenomenon of much dandruff is formed.

Oily scalp can be well moisturized due to more grease, dandruff is less generated, but the grease secreted is secreted onto hair, so that the hair is very greasy, the hair is not clean, and the beauty of the hair is seriously affected.

Therefore, in order to relieve the problems of much dandruff or greasy hair, the dandruff removing and/or oil controlling components are usually required to be added into the shampoo, but because the shampoo is applied in the hair washing process, the biggest difference between the shampoo and the skin care product is that after the hair washing is finished, the shampoo is not attached to the scalp and the hair in a large amount, the dandruff removing and oil controlling components in the shampoo can be absorbed by the skin part only in a short time, most of the components are washed away and lost in the washing process, so that the conditioning effect of the effective components in the common shampoo on the scalp is relatively common, therefore, the effects of dandruff removing and oil controlling are difficult to last, and the improvement space is provided.

Disclosure of Invention

In order to prolong the effects of removing dandruff and controlling oil, the application provides the dandruff-removing and oil-controlling shampoo.

The application provides a dandruff control oil shampoo adopts following technical scheme:

the anti-dandruff oil-control shampoo comprises the following components in parts by weight:

75.716809-76.013271 parts of solvent;

5363-3242 parts of a surfactant 15.868-15.922;

0.508 to 0.514 portion of humectant;

3.791529-3.878991 parts of conditioner for hair;

preservative 0.1168-0.1216 parts;

0.49-0.51 parts of aromatic;

1.48-1.52 parts of pearling agent;

0.818 to 0.842 part of thickening agent;

0.29-0.31 part of suspending agent;

0.09-0.11 part of pH regulator;

chelating agent 0.0444-0.0446 weight portions;

0.49-0.51 part of anti-dandruff agent;

the hair conditioner at least comprises fructus Cnidii extract, lactobacillus/soybean milk fermentation product filtrate, and radix Ipomoeae juice;

the mass portion of the cnidium monnieri fruit extract in the anti-dandruff oil-control shampoo is 0.39-0.41;

the mass portion of the lactobacillus/soybean milk fermentation product filtrate in the anti-dandruff oil-control shampoo is 0.009-0.011;

the mass portion of the yacon root juice in the anti-dandruff oil control shampoo is 0.018 to 0.02 portion.

By adopting the technical scheme, the cnidium fruit extract, the lactobacillus/soybean milk fermentation product filtrate and the jerusalem artichoke root juice are added into the anti-dandruff oil-control shampoo, and the skin channel of the scalp can be quickly opened by utilizing the mutual matching of the cnidium fruit extract, the lactobacillus/soybean milk fermentation product filtrate and the jerusalem artichoke root juice, so that the active ingredients in the shampoo are quickly absorbed by the skin, the anti-dandruff oil-control shampoo has a better conditioning effect on the skin, and the persistence of anti-dandruff and oil control is better improved.

The cnidium fruit extract, the lactobacillus/soybean milk fermentation product filtrate and the yacon root juice are matched with each other, the effect of regulating microecological balance on scalp can be achieved, harmful bacteria can be inhibited, the growth of beneficial bacteria can be promoted, the microecological balance of scalp can be regulated, the probiotics can be utilized to propagate on scalp to permanently improve scalp, the scalp is enabled to have a long moisturizing effect, the secretion of oil and fat is controlled, the cuticle is not easy to dry and fall off, meanwhile, a large amount of oil and fat can not be secreted to cause greasiness of hair, the harmful bacteria are inhibited during sterilization, the harmful bacteria are reduced, the growth of the probiotics is promoted, the competitive propagation of the harmful bacteria is utilized to inhibit the propagation of the harmful bacteria through the effect of eliminating the growth of the harmful bacteria, the inhibiting effect on the harmful bacteria is enabled to be lasting, the physiological environment and the skin state of the scalp are durably improved, and the persistence of the oil removing and controlling effect is further improved.

Preferably, the surfactant comprises one or more of sodium laureth sulfate, ammonium laureth sulfate, cocamidopropyl betaine, sodium lauroamphoacetate, cocamide MEA, ethanolamine, coconut oil.

By adopting the technical scheme, the specific selection of the surfactant ensures that the cleaning effect is better, the oil and impurities on the scalp and the hair can be better cleaned, the hair is cleaner after being washed, and the beauty of the hair is better improved by matching the effects of removing dandruff and controlling oil for a long time.

Preferably, the humectant is one or two of glycerin and butanediol.

By adopting the technical scheme, the components of the humectant are specifically selected, a certain moisturizing effect can be generated in the hair washing process, and the effect of improving the scalp by bacterial colony is better improved through the moisturizing capability of the scalp.

Preferably, the hair conditioner further comprises one or more of polygonum multiflorum root extract, cacumen biotae extract, polyquaternium-52, laureth-16, polyquaternium-53, polyquaternium-28, polydimethylsiloxane, trideceth-3, trideceth-10, ethylhexylglycerin, tocopherol, dimethiconol, dodecylbenzene sulfonate TEA salt, chlorphenesin, PEG-20 oleate, C12-13 sodium alkyl polyether sulfate, polyquaternium-7, propylparaben, guar hydroxypropyl trimonium chloride, 1,2-pentanediol, alpha-glucan oligosaccharide, maltodextrin, and lactobacillus.

By adopting the technical scheme, the hair conditioner is more flexible through specific selection of the hair conditioner, has a better effect on microecological balance of the scalp, better conditions the scalp, ensures that the scalp is less prone to generating dandruff and secreting excessive grease, and has more lasting efficacy of removing dandruff and controlling oil.

Preferably, the hair conditioner at least comprises a polygonum multiflorum root extract and a cacumen biotae extract.

By adopting the technical scheme, the fleece-flower root extract, the cacumen biotae extract, the cnidium fruit extract, the lactobacillus/soybean milk fermentation product filtrate and the jerusalem artichoke root juice are specifically selected to be matched, so that the scalp conditioning effect is better, the harmful bacteria inhibiting effect is better, the effect of promoting the growth of the probiotics can be further improved, the probiotics has better competitive advantage, the harmful bacteria can be inhibited for a longer time, the scalp can be improved for a longer time, and the effects of removing dandruff and controlling oil are better.

Preferably, the mass portion of the polygonum multiflorum root extract in the anti-dandruff oil control shampoo is 0.108-0.112;

the mass portion of the cacumen biotae extract in the anti-dandruff oil control shampoo is 0.180-0.112.

By adopting the technical scheme, the scalp conditioning effect is better, the micro-ecological balance adjusting effect is better, the scalp is healthier, and the dandruff removing and oil controlling effects are better by specifically selecting the matching proportion of the polygonum multiflorum root extract, the cacumen biotae extract, the cnidium fruit extract, the lactobacillus/soybean milk fermentation product filtrate and the jerusalem artichoke root juice.

Preferably, the preservative comprises one or more of phenoxyethanol, methyl hydroxybenzoate, methylisothiazolinone, benzyl alcohol and propylene glycol.

By adopting the technical scheme, the stimulation of the preservative to the scalp is reduced through the specific selection of the preservative, the harm to probiotics is reduced, the regulating effect of the microecological balance of the scalp is facilitated, the scalp is better repaired, and the efficacy of removing dandruff and controlling oil is better.

Preferably, the thickener comprises one or two of sodium chloride and hydroxypropyl methyl cellulose.

By adopting the technical scheme, the thickening agent is specifically selected, so that the hair washing cream has proper consistency, better experience is achieved during hair washing, the hair colony can be improved as far as possible by the effective components, the effect of regulating the balance of scalp microorganisms is better, and the persistence of dandruff removal and oil control is higher.

Preferably, the lactobacillus/soybean milk fermentation product filtrate is prepared by the following method:

step 1), mixing red beans, black beans and soybeans, adding water and grinding into soybean milk;

step 2), heating the soybean milk to boil, and maintaining for 5-10min;

step 3), cooling the soybean milk to 38-40 ℃, adding lactobacillus, keeping the temperature at 38-40 ℃, and fermenting for 72-76h;

step 4), fermenting for 72-76h at the constant temperature of 38-40 ℃ and under the pressure of 0.02-0.03 MPa;

and 5), filtering and concentrating to obtain the lactobacillus/soybean milk fermentation product filtrate.

By adopting the technical scheme and through a special fermentation process, after the obtained fermentation product filtrate is matched with the cnidium fruit extract and the yacon root juice, the effect of conditioning the scalp is more efficient, the effect of regulating the microecological balance of the scalp is better, particularly the effect of promoting the growth and the propagation of probiotics is better, and the effect of removing dandruff and controlling oil for a long time is better.

In summary, the present application has the following beneficial effects:

1. according to the application, the cnidium fruit extract, the lactobacillus/soybean milk fermentation product filtrate and the jerusalem artichoke root juice are added into the anti-dandruff and oil-control shampoo, and the cnidium fruit extract, the lactobacillus/soybean milk fermentation product filtrate and the jerusalem artichoke root juice are matched with one another, so that a skin channel of a scalp can be quickly opened, effective ingredients in the shampoo are quickly absorbed by the skin, a better conditioning effect is achieved on the skin, and the persistence of anti-dandruff and oil-control is better improved.

2. In the application, the specific selection of the polygonum multiflorum root extract, the cacumen biotae extract, the cnidium fruit extract, the lactobacillus/soybean milk fermentation product filtrate and the jerusalem artichoke root juice is preferably adopted, so that the scalp conditioning effect is better, the harmful bacteria inhibiting effect is better, the effect of promoting the growth of the probiotics can be further improved, the probiotics has better competitive advantage, the harmful bacteria can be inhibited for a longer time, the scalp can be improved for a longer time, and the anti-dandruff and oil control effects are better.

3. In the application, after the obtained fermentation product filtrate is preferably matched with the cnidium fruit extract and the jerusalem artichoke root juice through a special fermentation process, the scalp conditioning effect is better, the scalp micro-ecological balance adjusting effect is better, particularly the effect of promoting the growth and the propagation of probiotics is better, and the effect of removing dandruff and controlling oil for a long time is better.

Detailed Description

The present application will be described in further detail with reference to examples.

Example 1

The anti-dandruff oil-control shampoo comprises the following components:

solvents, surfactants, moisturizers, hair conditioners, preservatives, fragrances, pearlescers, thickeners, suspending agents, PH adjusters, chelating agents, antidandruff agents.

The solvent is deionized water.

The surfactant is a compound of sodium laureth sulfate, ammonium laureth sulfate, cocamidopropyl betaine, sodium lauroamphoacetate, cocamide MEA, ethanolamine and coconut oil.

The humectant is prepared by compounding glycerol and butanediol.

The hair conditioner is a compound of a cnidium fruit extract, a lactobacillus/soybean milk fermentation product filtrate and a jerusalem artichoke root juice.

The preservative is a compound of phenoxyethanol, methyl hydroxybenzoate, methylisothiazolinone, benzyl alcohol and propylene glycol.

The aromatic is essence.

The pearling agent is ethylene glycol distearate.

The thickener is a compound of sodium chloride and hydroxypropyl methyl cellulose.

The suspending agent is trihydroxystearin.

The pH regulator is citric acid.

The chelating agent is disodium EDTA.

The antidandruff agent piroctone olamine.

The specific amounts of each component added are detailed in table 1.

Wherein, the cnidium fruit extract is a water extract, and the proportion extract is 10:1, purchased from Guangdong gurene Biotech, inc.

The yacon root juice is purchased from megafactory honesty chemical Co., ltd.

The preparation method of the lactobacillus/soybean milk fermentation product filtrate comprises the following steps:

step 1), weighing 1kg of red beans, 2kg of black beans and 1kg of soybeans, putting into a stirring kettle, uniformly mixing, washing with clear water, putting into a wall breaking machine, adding 4kg of water, and breaking the wall to form soybean milk;

step 2), heating the soybean milk to boil, and maintaining for 5min;

step 3), putting the soybean milk into a fermentation tank, cooling to 38 ℃, then putting 3g of lactobacillus into the fermentation tank, closing the fermentation tank, keeping the temperature at 38 ℃, and fermenting for 76 hours;

step 4), keeping the temperature at 38 ℃, pumping out air in the fermentation tank, controlling the pressure in the fermentation tank to be 0.03MPa, and fermenting for 76h;

and step 5), performing filter pressing on the mixture through 200-mesh filter cloth under the pressure filter at 5MPa to obtain filtrate, and concentrating the filtrate at the low pressure of 60 ℃ until the mass of the filtrate is 0.4kg to obtain the lactobacillus/soybean milk fermentation product filtrate.

Wherein the lactobacillus is Lactobacillus plantarum purchased from Sienna Yam Biotechnology Limited, and the viable bacteria content is 1000 hundred million cfu/g.

The preparation method of the anti-dandruff oil-control shampoo comprises the following steps:

step 1) putting water, sodium laureth sulfate, ammonium laureth sulfate, glycerol, sodium lauroamphoacetate, butanediol, phenoxyethanol, methylparaben, ethylene glycol distearate and disodium EDTA into a stirring pot, stirring at a rotating speed of 120r/min, heating to 85 ℃, and stirring for 5min.

Step 2), adding citric acid into the stirring pot at a rotation speed of 120r/min, keeping the temperature at 85 ℃, and stirring for 5min;

step 3), adding the cocamide MEA, the ethanolamine and the coconut oil into a stirring pot, keeping the temperature at 85 ℃, and stirring for 30min;

and 4), cooling the materials in the stirring pot to 45 ℃, adding essence, the cnidium fruit extract, the lactobacillus/soybean milk fermentation product filtrate and the jerusalem artichoke root juice, rotating at the speed of 120r/min, and stirring for 5min.

And step 5), adding cocamidopropyl betaine, piroctone ethoxide, trihydroxystearin, methylisothiazolinone, benzyl alcohol, propylene glycol, hydroxypropyl methyl cellulose and sodium chloride into a stirring pot, stirring at the rotating speed of 120r/min for 5min to obtain the anti-dandruff oil-control shampoo.

Example 2

Compared with example 1, the anti-dandruff oil-control shampoo is characterized in that:

the amounts of the components added are different, and the specific amounts of the components added are detailed in table 1.

Example 3

the hair conditioner is a compound of cnidium fruit extract, lactobacillus/soybean milk fermentation product filtrate, yacon root juice, polygonum multiflorum root extract and cacumen biotae extract.

The specific amounts of each component added are detailed in table 1.

Wherein, the polygonum multiflorum root extract is a water extract, and the proportion extract is 10:1, purchased from Guangzhou Baoji Biotechnology Co., ltd.

The cacumen biotae extract is a water extract, and the proportion of the extract is 10:1, purchased from Guangzhou Baoji Biotechnology Co., ltd.

Example 4

An anti-dandruff oil-control shampoo which is different from the shampoo of example 2 only in that:

The specific amounts of each component added are detailed in table 1.

Example 5

An anti-dandruff and oil-control shampoo, which is different from the shampoo of example 1 only in that:

the conditioner for hair is a compound of cnidium fruit extract, lactobacillus/soybean milk fermentation product filtrate, jerusalem artichoke root juice, polygonum multiflorum root extract, cacumen biotae extract, polyquaternium-52, laureth-16, polyquaternium-53, polyquaternium-28, polydimethylsiloxane, trideceth-3, trideceth-10, ethylhexyl glycerol, tocopherol, dimethiconol, dodecyl benzene sulfonate TEA salt, chlorphenesin, PEG-20 oleate, C12-13 alkanol polyether sodium sulfate, polyquaternium-7, propyl hydroxybenzoate, guar hydroxypropyl trimonium chloride, 1,2-pentanediol, alpha-glucan oligosaccharide, maltodextrin and lactobacillus.

The specific amounts of each component added are detailed in table 1.

Example 6

The specific amounts of each component added are detailed in table 1.

Table 1: the specific amounts (in kg) of each component charged in examples 1-6,

TABLE 1

Example 7

step 2), heating the soybean milk to boil, and maintaining for 10min;

step 3), putting the soybean milk into a fermentation tank, cooling to 40 ℃, then putting 3g of lactobacillus, closing the fermentation tank, keeping the temperature at 40 ℃, and fermenting for 72 hours;

step 4), keeping the temperature at 40 ℃, pumping out air in the fermentation tank, controlling the pressure in the fermentation tank to be 0.02MPa, and fermenting for 72 hours;

Example 8

the lactobacillus/soymilk fermentation product filtrate is commercially available.

Comparative example 1

equal amount of fructus Cnidii extract is replaced by radix Sophorae Flavescentis extract.

Comparative example 2

replacing lactobacillus/soybean milk fermentation product filtrate with radix Sophorae Flavescentis extract.

Comparative example 3

equal amount of radix Sophorae Flavescentis extract is used to replace yacon root juice.

Comparative example 4

Compared with example 3, the anti-dandruff oil-control shampoo is only different from the following components in that:

equal amount of radix Sophorae Flavescentis extract is used to replace radix Polygoni Multiflori extract.

Comparative example 5

An anti-dandruff oil-control shampoo which is different from the shampoo of example 3 only in that:

equal amount of the cacumen Platycladi extract is replaced by radix Sophorae Flavescentis extract.

Experiment 1

A plurality of volunteers are called, 5 persons are called in each group, the anti-dandruff oil-control shampoo of each embodiment and each comparative example is used in groups, the hair is washed once every three days for 5min, and the hair is washed and then cleaned with clear water and dried by electric air blowing.

After the hair is washed for the tenth time and dried, the oil content of the scalp and the quantity of the dandruff are tested and respectively recorded as the initial oil content of the scalp and the initial quantity of the dandruff.

And then, the hair is not washed again, and the oil content of the scalp and the amount of dandruff are tested again at 1d, 3d and 7d after the hair is washed, and are respectively recorded as the oil content of the scalp at 1d, the amount of dandruff at 1d, the oil content of the scalp at 3d, the amount of dandruff at 3d, the oil content of the scalp at 7d and the amount of dandruff at 7 d.

And calculating 1d, 3d and 7d as the change rate of the oil content of the scalp and the change rate of the quantity of the dandruff.

The rate of change of the oil content of the scalp at 1d =1d scalp oil content ÷ initial scalp oil content × 100%.

The rate of change of the scalp oil content of 3d =3d scalp oil content ÷ initial scalp oil content × 100%.

The rate of change of the scalp oil content of 7d =7d scalp oil content ÷ initial scalp oil content × 100%.

Rate of change in dandruff number of 1d = dandruff number of 1 d-initial dandruff number.

3d rate of change in dandruff number =3d dandruff number-initial dandruff number.

Rate of change in dandruff number of 7d = dandruff number of 7 d-initial dandruff number.

Scalp grease test method:

based on the principle of a photometer, the oil on the skin of a human body is absorbed by a special extinction adhesive tape with the thickness of 0.1mm, the extinction adhesive tape can be changed into a semitransparent shape, the light transmission amount is changed, the more the absorbed oil is, the larger the light transmission amount is, so that the skin oil content is measured, the larger the numerical value is, the higher the skin oil content is represented, and the larger the skin oil yield is.

The oil content of the scalp at the top of the head of the subject was measured using a skin oil tester Sebumeter.

Dandruff number test method:

and testing the quantity of the dandruff by using a dandruff test card, and testing the dandruff at the top of the head, above the two ears and at the back of the brain, namely testing the quantity of the dandruff in the four areas, and taking the average value.

The specific assay data for experiment 1 is detailed in Table 2

According to the data in table 2, it can be seen that when the cnidium fruit extract, the lactobacillus/soybean milk fermentation product filtrate and the jerusalem artichoke root juice are compounded, the absorption of the skin to the active ingredients can be better promoted, the skin can be well conditioned in a short time of hair washing, so that the continuous effect of removing dandruff and controlling oil is obviously improved, and when any one of the cnidium fruit extract, the lactobacillus/soybean milk fermentation product filtrate and the jerusalem artichoke root juice is replaced, the continuous effect of removing dandruff and controlling oil is obviously reduced.

The radix polygoni multiflori extract and the cacumen biotae extract are added on the basis of the cnidium fruit extract, the lactobacillus/soybean milk fermentation product filtrate and the jerusalem artichoke root juice, so that the persistence of the anti-dandruff oil control effect can be further improved, and when any one of the radix polygoni multiflori extract and the cacumen biotae extract is replaced, the effect of improving the persistence of the anti-dandruff oil control is obviously reduced.

When the lactobacillus/soybean milk fermentation product filtrate prepared by adopting a specific process is added, compared with the lactobacillus/soybean milk fermentation product filtrate added in the market, the persistence of the anti-dandruff oil control effect is improved to a certain extent.

The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.

Claims

1. The anti-dandruff oil-control shampoo is characterized in that: the paint comprises the following components in parts by mass:

75.716809-79.07241 parts of solvent;

5363-3242 parts of a surfactant 15.868-15.922;

0.508 to 0.514 portion of humectant;

0.417-3.878991 parts of hair conditioner;

preservative 0.1168-0.1216 parts;

0.49-0.51 parts of aromatic;

1.48-1.52 parts of pearling agent;

0.818 to 0.842 portion of thickening agent;

0.29-0.31 part of suspending agent;

0.09-0.11 part of pH regulator;

chelating agent 0.0444-0.0446 parts;

0.49-0.51 part of anti-dandruff agent;

2. The anti-dandruff oil-control shampoo according to claim 1, wherein: the surfactant comprises one or more of sodium laureth sulfate, ammonium laureth sulfate, cocamidopropyl betaine, sodium lauroamphoacetate, cocamide MEA, ethanolamine and coconut oil.

3. The anti-dandruff oil-control shampoo according to claim 1, wherein: the humectant is one or two of glycerin and butanediol.

4. The anti-dandruff oil-control shampoo according to claim 1, wherein: the hair conditioner also comprises one or more of polygonum multiflorum root extract, cacumen biotae extract, polyquaternium-52, laureth-16, polyquaternium-53, polyquaternium-28, polydimethylsiloxane, trideceth-3, trideceth-10, ethylhexylglycerin, tocopherol, dimethiconol, dodecylbenzene sulfonate TEA salt, chlorphenesin, PEG-20 oleate, C12-13 sodium alkyl polyether sulfate, polyquaternium-7, propyl hydroxybenzoate, guar hydroxypropyl trimonium chloride, 1,2-pentanediol, alpha-glucan oligosaccharide, maltodextrin and lactobacillus.

5. The anti-dandruff oil-control shampoo according to claim 4, wherein: the hair conditioner at least comprises a polygonum multiflorum root extract and a cacumen biotae extract.

6. The anti-dandruff oil-control shampoo according to claim 5, wherein: the mass portion of the polygonum multiflorum root extract in the anti-dandruff oil control shampoo is 0.108-0.112;

7. The anti-dandruff oil-control shampoo according to claim 1, wherein: the antiseptic comprises one or more of phenoxyethanol, methyl hydroxybenzoate, methylisothiazolinone, benzyl alcohol and propylene glycol.

8. The anti-dandruff oil-control shampoo according to claim 1, wherein: the thickening agent comprises one or two of sodium chloride and hydroxypropyl methyl cellulose.

9. The anti-dandruff oil-control shampoo according to claim 1, wherein: the preparation method of the lactobacillus/soybean milk fermentation product filtrate comprises the following steps:

step 2), heating the soybean milk to boil, and maintaining for 5-10min;