KR20210023407A - Manufacturing method for liquid soap - Google Patents

Abstract

The present invention relates to a manufacturing method of a liquid soap, comprising: a fatty acid manufacturing step for separating vegetable fatty acids from plants; an accelerator manufacturing step of mixing potassium carbonate and purified water; and a soap manufacturing step of stirring the vegetable fatty acid and the accelerator. Accordingly, it is less burdensome to handle by using potassium carbonate, a material which can be added to foods, the saponification reaction can proceed at room temperature through reaction with fatty acids, and all materials used are made of food-added materials, thereby being free from product defect rates due to safety issues while ensuring safety during a manufacturing process. In addition, even when compared to products using general surfactants, skin irritation can be remarkably reduced while maintaining a decent level of cleaning power.

Description

Manufacturing method for liquid soap {Manufacturing method for liquid soap}

The present invention relates to a liquid soap, and more particularly, to a liquid soap that does not add a surfactant, and is composed of only edible materials, which can reduce irritation to the skin as well as excellent cleansing power.

The surface of the skin is covered with a stratum corneum to protect the skin first, and various harmful impurities adhere or penetrate into the skin of humans who engage in social activities while exposed to various pollutant environments.

Impurities adhering to the skin or penetrating into the skin are provided as nutrients for bacteria or interfere with the smooth cell activity of the skin, causing skin troubles such as dermatitis, and blocking the sweat glands, leading to side effects such as deterioration of the body temperature control function through sweat discharge. As it occurs, the skin needs to be cleaned frequently.

The detergent has adequate foaming power in cold water and hot water, cleanly removes oily and aqueous contamination adhering to the skin, has less irritation to the skin, prevents excessive degreasing, supplies moisture to the skin that is easy to be taken away during washing, and evaporates moisture at the same time. It is desirable to have a product that has excellent skin moisturizing power so that it can prevent skin roughness and increase skin flexibility.

Typically, detergents include surfactants, cleaning agents, moisturizing agents such as natural moisturizing ingredients and natural vegetable oils, active ingredients for pursuing functionality, and fragrances with an aroma effect. It gives moisturizing power, cleaning power and foaming power to the product. Looking at the product characteristics according to the surfactant, if only fatty acid soap, which is an anionic surfactant, is used, it has excellent foaming power and cleansing power, but if the cleansing power is excessive, it can weaken or roughen the skin. On the other hand, the interface excluding fatty acid soap components In the case of the active agent, the foaming power is adequate, but there is a problem in that a slippery sensation remains due to insufficient skin adsorption and rinse properties of the surfactant, and skin irritation caused by the surfactant is sometimes caused.

On the other hand, natural soap refers to a soap made by adding a natural material having a surfactant function without adding a synthetic surfactant, which is a chemical substance. Unlike conventional soaps using a synthetic surfactant, it has the advantage of significantly reducing irritation to the skin. . Such natural soap is disclosed in'Patent Document 1'.

'Patent Literature 1'relates to a liquid soap manufacturing method using bamboo charcoal, and the claim 1 relates to an oil base by heating and stirring a mixed oil of palm oil, coconut oil, castor oil, and rice bran oil to 80°C. Oil base manufacturing step of manufacturing; A saponification solution preparation step of mixing 115 parts by weight of purified water and 115 parts by weight of potassium hydroxide based on 500 parts by weight of the mixed oil, heating to 80° C. and stirring to prepare a saponification solution; A soap paste preparation step of preparing a soap paste by mixing the oil base and the saponification solution and then stirring with a blender until a gelled state is achieved; A sugar mixture preparation step of mixing 115 parts by weight of purified water and 35 parts by weight of sugar based on 500 parts by weight of the mixed oil and heating to 80° C. to prepare a sugar mixture; A transparent soap paste manufacturing step of adding the sugar mixture to the soap paste and stirring to prepare a transparent soap paste; A bathing step of cooling the transparent soap paste after bathing; A bamboo soap paste manufacturing step of preparing a bamboo soap paste by adding 1 to 2 parts by weight of aroma oil and 5 to 10 parts by weight of bamboo charcoal powder to the transparent soap paste bathed in the bathing step based on 500 parts by weight of the mixed oil; A stabilizing step of stabilizing the bamboo soap paste for 2 to 4 weeks at a temperature between 2° C. and 5° C.; A dilution step of preparing a liquid bamboo soap by mixing the stabilized bamboo soap paste with a diluent in a ratio of 1:2 and adding 0.2 to 0.5 parts by weight of bamboo salt; liquid soap using bamboo charcoal, comprising: Manufacturing method” is disclosed.

However, even in the case of'Patent Document 1', potassium hydroxide is used as an accelerator to induce the saponification reaction. Potassium hydroxide is a strongly basic substance and requires a high level of management and supervision to prevent accidents in the manufacturing process. Also, the high pH can cause problems when ingested by animals or children.

KR 10-2019-0064830 A1 (2019. 6. 11.)

The present invention was devised to solve the above problems, and the problem to be solved in the present invention is to use potassium carbonate as a food additive as an accelerator for inducing a saponification reaction, and to improve the reaction efficiency from potassium carbonate. It is to provide a method for producing liquid soap reacted with fatty acids.

The manufacturing method of the liquid soap according to the present invention for solving the above problems includes a fatty acid manufacturing step of separating vegetable fatty acids from plants; An accelerator manufacturing step of mixing potassium carbonate and purified water; And a soap manufacturing step of stirring the vegetable fatty acid and the accelerator.

The manufacturing method of liquid soap according to the present invention uses potassium carbonate, a material that can be added to food, so that the burden on handling is low, and the saponification reaction can proceed at room temperature through reaction with fatty acids, and all materials used are food additives. It ensures safety in the manufacturing process and is free from the defect rate of products due to safety issues.

In addition, it is possible to significantly reduce skin irritation while maintaining an acceptable level of cleansing power even when compared to products using general surfactants.

1 is a block diagram of a method of manufacturing a liquid soap according to the present invention
2 is a photograph showing the appearance of Example 2
3 is a photograph showing the appearance of Comparative Example 3

Terms and words used in the present specification and claims conform to the technical idea of the present invention based on the principle that "the inventor can appropriately define the concept of terms in order to describe his or her invention in the best way." It should be construed as a meaning and concept, but not limited to a conventional or dictionary meaning.

Therefore, the embodiments described in the present specification and the configurations shown in the drawings are only the most preferred embodiments of the present invention, and do not represent all the technical spirit of the present invention, and thus various equivalents that can replace them at the time of application It should be understood that there may be water and variations.

The fatty acid production step (S10) is a step of preparing a fatty acid, which is a reactant for a saponification reaction, and the present invention extracts and uses a fatty acid from vegetable oil. As raw materials for vegetable oils that can be used, palm oil, coconut oil, sunflower oil, grapeseed oil, olive oil, avocado oil, jojoba oil, evening primrose oil, soybean oil, brown rice oil, canola oil, and the like can be used. The present invention has the advantage of performing an efficient reaction even at room temperature by performing a saponification reaction using the fatty acid extracted from vegetable oil as described above. Hereinafter, it will be described based on the use of coconut fatty acids extracted from coconut oil.

The accelerator manufacturing step (S20) is a step of preparing an accelerator that emulsifies in a saponification reaction, and an aqueous potassium carbonate solution is used as the accelerator of the present invention. In general, the present invention uses potassium carbonate, which is an edible substance, not sodium hydroxide or potassium hydroxide, which are representative substances of the saponification reaction, i) is free from safety accidents due to harmful substances that may occur during the manufacturing process of soap, and ii) even after the saponification reaction. There is also the advantage of being free from the problem of product defect rates (for example, high pH or toxicity) due to residual potassium hydroxide.

However, compared to sodium hydroxide or potassium hydroxide, potassium carbonate has a somewhat lower limit in reactivity, but the present invention can compensate for the limitation of potassium carbonate by using fatty acids extracted from oil.

On the other hand, in the accelerator manufacturing step (S20), sodium hydrogen carbonate may be further added. Sodium hydrogen carbonate serves to increase the cleaning power, and it is preferable to add 0.5 to 7% by weight based on the total weight. When it exceeds 7% by weight, it is not completely dissolved at room temperature, and when it is less than 0.5% by weight, cleaning power cannot be supplemented.

The soap production step (S30) is a step of preparing a soap by mixing the vegetable fatty acid prepared in the fatty acid production step (S10) and an accelerator to perform a saponification reaction.

The soap production step (S30) is mixed by stirring the fatty acid and the accelerator with a stirrer at a temperature of 4°C or higher. This is because if the saponification reaction does not occur sufficiently and part of the base oil remains unreacted, a problem of rancidity occurs. Preferably, it should be stirred for at least 30 minutes. In addition, the present invention has the advantage that the reaction can sufficiently occur even when stirring at room temperature without the need to stir while heating by using the fatty acid of the plant.

In addition, in the soap manufacturing step (S30), it is preferable to mix the fatty acids while gradually administering the fatty acids to the container containing the accelerator, because if mixed at once, there is a problem that a reaction may occur explosively due to carbon dioxide gas generation. Accordingly, in order to perform the process quickly and stably, the gas generated by the vacuum deaerator can be immediately discharged.

In terms of the amount added, the fatty acid is preferably 5 to 25% by weight based on the total weight ratio. When the fatty acid is less than 5% by weight, the cleaning power is rapidly reduced and the viscosity is too low, so that the cleaning agent easily flows down during actual use. On the other hand, when the fatty acid exceeds 30% by weight, the viscosity is excessively increased, so that it is difficult to come out of the container during actual use, and there is a problem that bubbles do not occur in the container that generates bubbles during pumping.

And in the case of potassium carbonate, it is preferably 7% to 35% by weight. This is due to the fact that the ratio of the fatty acid to the potassium carbonate is considered, and the ratio of the fatty acid to the potassium carbonate is preferably mixed in a ratio of 1:1 to 5:7 based on the weight ratio. If potassium carbonate is mixed below the above ratio, there is a problem that the viscosity is lowered and washed less and becomes cloudy. If it is mixed above the above ratio, it is difficult to adjust the pH, and the skin moisturizing power decreases due to the excess of potassium carbonate. have.

The liquid soap according to the present invention has a pH of 8.0 to 9.8 depending on the dosage of potassium carbonate, but a separate pH adjusting agent is not administered. This is because when the pH falls below 8.0, there is a problem that transparency decreases as it becomes cloudy.

Example

Coconut fatty acid was separated and extracted from coconut oil, potassium carbonate was dissolved in purified water, and then the coconut fatty acid was added little by little to the potassium carbonate aqueous solution and stirred for 30 minutes to complete the soap. The room temperature was 25°C. And the composition ratio according to each example is shown in Table 1 below (variables are indicated in red).

Experimental Example 1. Observation of appearance and measurement of viscosity

The appearance of the liquid soap prepared according to Examples and Comparative Examples was observed, and the viscosity was measured using a viscosity meter. The results are shown in Table 2 below.

All of Examples 1 to 6 were evaluated to be transparent, and in particular, the appearance of Example 2 was as shown in FIG. 2, and the other examples were also transparent to a similar level. On the other hand, in the case of Comparative Example 3, it was evaluated as being opaque as shown in FIG. 3, and in Comparative Example 5, it was evaluated that there was a settled precipitate, although it was transparent.

Experimental Example 2. Measurement of the amount of foam

The amount of foam in Examples and Comparative Examples was measured. Specifically, the amount of foam was measured through a cross-miles foam test. The results are shown in Table 3 below.

It can be seen that all of the other comparative examples except Examples 1 to 6 and Comparative Example 1 have an excellent level of foam generation ability.

Experimental Example 3. Detergency test (sensory test)

The cleaning power of Examples 2 and 4 and Comparative Examples 3 and 4 was evaluated for 10 men and women between their 20s and 40s. The smoothness when washing hands and the cleanliness after rinsing with water were evaluated, and 5 points for excellent and 1 point for poor evaluation were evaluated according to the 5-point evaluation method. The results are shown in Table 4 below.

Examples 2 and 4 and Comparative Example 4 were all evaluated for excellent level of cleanliness, and among them, Example 4 was evaluated at a relatively higher level. On the other hand, in the case of Comparative Example 3, it can be seen that the cleanliness is somewhat low, but according to the opinions of evaluators, the answer was that it was caused by residual substances on hands after washing.

In terms of slippery, Examples 2 and 4 and Comparative Example 3 were evaluated to have almost no slippery after use at an excellent level, but in the case of Comparative Example 4, it was evaluated that there was a slippery.

Claims (5)

Fatty acid production step of separating the vegetable fatty acid from the plant;
An accelerator manufacturing step of mixing potassium carbonate and purified water; And
A method for producing a liquid soap comprising the step of preparing a soap for stirring the vegetable fatty acid and the accelerator.
The method according to claim 1,
The fatty acid is 5 to 25% by weight based on the total weight ratio,
Potassium carbonate is 7% to 35% by weight based on the total weight ratio,
A method for producing a liquid soap, characterized in that the ratio of fatty acid to potassium carbonate is mixed in a ratio of 1:1 to 5:7 based on a weight ratio.
The method according to claim 1,
The soap manufacturing step is a method for producing a liquid soap, characterized in that stirring while gradually adding the vegetable fatty acid to the accelerator.
The method according to claim 1,
The additive manufacturing step further comprises peppermint oil or sodium hydrogen carbonate.
Liquid soap, characterized in that prepared according to any one of claims 1 to 4.

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