JP2013018940A - Solid soap and method of manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a solid soap in which foaming is excellent to also hard water and which works gently to skin even if a special medicinal effect component is not combined.SOLUTION: The soap is manufactured by using a hot spring water of sodium chloride and hydrogen carbonate fountain, especially a hot spring water that contains as anions, ≥30% by mval of a chlorine ion (Cl) and ≥30% by mval of a hydrogen carbonate ion (HCO) when being manufactured by including oil-and-fat and caustic soda as main raw materials, thereby the solid soap in which foaming is excellent to hard water, which works gently on the skin, and in which a beauty effect can be expected is manufactured.

Description

  The present invention relates to a solid soap and a method for producing the same, and more particularly to a novel solid soap that is gentle to the skin and has a cosmetic effect, and a method for efficiently producing the solid soap.

  Solid soaps containing various additive components are known as solid cosmetic soaps (hereinafter referred to as “solid soaps”) mainly composed of sodium salts of higher fatty acids for the purpose of enhancing beauty effects and other functionalities. .

For example, in JP-A-9-194893 (Patent Document 1), a transparent solid soap containing a certain higher fatty acid salt and a collagen compound as main active ingredients has a smooth and moist feeling on the skin after use. It is described that it has excellent foam quality. Japanese Patent Laid-Open No. 2000-248299 (Patent Document 2) describes medicinal charcoal to prevent skin aging caused by negative ions of charcoal, whitening effect due to bleaching action, and oil content to small pores on the surface of charcoal. There has been proposed a soap bar that suppresses the oxidation of the skin due to the absorption effect of and toxins.
On the other hand, in Japanese Patent Application Laid-Open No. 2003-119499 (Patent Document 3) and Japanese Patent Application Laid-Open No. 2007-217479 (Patent Document 4), respectively, by mixing bamboo leaf powder or mixing barley young leaves, Soaps have been proposed that effectively act on the skin and also have a cosmetic effect. Furthermore, JP 2009-256535 A (Patent Document 5) is blended with trehalose and Moso bamboo extract, has good foaming and foam quality (fine bubbles), and does not become null when rinsed. It is disclosed that a solid soap having a moist skin feel after washing with a feeling of use as described above is obtained.
However, each of these prior arts is intended to give a cosmetic effect etc. by blending a specific additive to soap, and pure water is used as the water essential for soap production. It is assumed that

JP-A-9-194893 JP 2000-248299 A JP 2003-119499 A JP 2007-217479 A JP 2009-256535 A

  The present invention is intended to provide a soap having good foaming with respect to hard water, gentle to the skin, and having a cosmetic effect even if it does not contain a special additive, and is used at the time of the production of soap that has not attracted much attention in the past. As a result of extensive research on water, the inventors have found that the purpose can be achieved by using specific hot spring water, and have achieved the present invention.

Thus, according to the present invention, the following bar soap and its manufacturing method are provided.
1. A soap bar produced using hot spring water of sodium chloride / bicarbonate spring.
2. In the soap of 1 above, the hot spring water of sodium chloride / bicarbonate spring used contains at least 30 millibar% of chloride ions (Cl ⁻ ) and hydrogen carbonate ions (HCO ₃ ⁻ ) as anions. A soap bar characterized by being
3. 1. A solid soap characterized in that the soaps of 1 and 2 are produced using sodium chloride / bicarbonate spring water, fats and oils and alkali compounds as main raw materials.
4). In the soap of said 1-3, the solid oil characterized by using the vegetable oil which made olive oil a main ingredient and mix | blended other vegetable oil with this as fats and oils to be used.
5. In the soap of said 1-4, in addition to said each component, honey is further contained, The solid soap characterized by the above-mentioned.
6). 1 to 5 soap, in addition to the above components, further contains an essential oil (essential oil).
7). Oils and fats and ingredients added as necessary are mixed and dissolved in sodium chloride / bicarbonate spring water, caustic soda is added to make neat soap, and this is molded into solid soap A method for producing a solid soap, characterized in that
8). In the above method, the hot spring water of sodium chloride / bicarbonate spring containing chlorine ions (Cl ⁻ ) and hydrogen carbonate ions (HCO ₃ ⁻ ) of 30 millibar% or more as anions is used. The manufacturing method of the solid soap of Claim 7.

  The solid soap of the present invention is good in foaming and foaming against hard water, has an appropriate hardness as a solid soap, and does not have a problem of deterioration of odor over time. And even if it does not contain a special medicinal component, etc., it has an effect of being gentle to the skin and having a rough skin suppressing effect.

  Ordinary soap is produced by mixing an oil or fat or fatty acid with an alkaline compound such as caustic soda (NaOH) or caustic potash (KOH) together with pure water under superheat. In the present invention, sodium is used instead of pure water. -The greatest feature is the use of hot spring water containing chloride and hydrogen carbonate.

This hot spring water contains, in addition to sodium ions (Na ⁺ ) mainly contained as cations, so-called mineral components such as calcium ions (Ca ²⁺ ) and magnesium ions (Mg ²⁺ ) in total of 3 millibar% or more, and In addition, chlorine ions (Cl ⁻ ) and hydrogen carbonate ions (HCO ₃ ⁻ ) as anions are each contained in an amount of 30 mbar% or more, and substantially free from sulfur components, etc. Hot spring water. The gas contained in the hot spring water preferably contains free carbon dioxide (CO ₂ ) and does not substantially contain free hydrogen sulfide (H ₂ S). The amount of the hot spring water used is suitably about 10 to 40% by weight with respect to the soap weight. In addition, this hot spring water is contained in substantially the same proportion in the soap product immediately after manufacture.

Here, “millibar (mval)” indicating the concentration of each component contained in the hot spring water is a unit representing the concentration of each ion dissolved in 1 kg of hot spring water, and 1 val (val) It is 1 mg equivalent / kg, and the numerical value of millival can be specifically obtained by the following equation.
Millival = [Amount contained in 1 kg of hot spring water (mg) / atomic weight or formula weight] × valence

  “Millival%” is the ratio of the millival value of each ion expressed as a percentage with the total of all ions being 100, and the ratio of the millival value of each cation or anion to the total millival value. It becomes millibar%.

  Examples of the fats and oils used in producing the soap of the present invention include olive oil, coconut oil, corn oil, corn oil, cottonseed oil, palm oil, palm kernel oil, peanut oil, rapeseed oil, safflower oil (safflower oil) Vegetable oils such as sesame oil, soybean oil and sunflower oil are preferred, but beef tallow and lard may be used in some cases. These fats and oils can be used in combination of two or more, and in many cases, it is preferable to use two or more in appropriate combination. For example, olive oil containing squalene, which is a natural moisturizing ingredient that contains a lot of oleic acid that is familiar to human skin, is mainly composed of coconut oil that improves foaming, and palm oil that makes soap hard and difficult to collapse. It is preferable to mix and use as appropriate. In addition, since red palm oil contains abundant natural carotene and vitamin E, an appropriate amount of red palm oil is expected to restore skin damage and rough skin.

  In addition, higher fatty acids having 12 or more carbon atoms such as lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid, linoleic acid, and ricinolenic acid can be used instead of fats and oils, and these are also used in combination of two or more. be able to.

  Among these fatty acids, when lauric acid is used, it becomes a hard soap, dissolves well in cold water, and has good hard water resistance. Furthermore, it is rich in foaming power and produces a large amount of good foam. However, the detergency is inferior to that using fatty acids with higher carbon numbers. Moreover, although water solubility is inferior to the case where myristic acid and lauric acid are used, the texture of the foam is fine and the sustainability is good. Soap using palmitic acid dissolves in water at 50 ° C or higher and exhibits detergency. When stearic acid is used, it dissolves in water at 60 ° C. or higher and exhibits high detergency at high temperatures. However, it becomes hard soap with poor hard water resistance and poor foaming power. Soap from palmitic acid and stearic acid does not dissolve in water and does not exhibit detergency unless the temperature is as high as about 70 ° C.

  On the other hand, oleic acid, which is the main component of olive oil, has an unsaturated bond, so it has good water solubility, dissolves well in cold water, and exhibits detergency. Moreover, it becomes a soft soap with good hard water resistance and good foaming. Soaps using linoleic acid and linolenic acid are softer and better water-soluble than oleic acid soaps, but their detergency is poor. Ricinolenic acid present in castor oil is a transparent soap that is hard and easily dissolved in water.

  In the present invention, caustic soda (NaOH) and caustic potash (KOH) are used as the alkali (basic) compound to be mixed with the above fats and fatty acids, and caustic soda is particularly preferable. Here, in this invention, since the oil good for skin is used, it is preferable to leave 5 to 15% according to a season and skin quality, without neutralizing all the oil. For this reason, the usage-amount of an alkali compound is suitable for the amount by which 85-95% of fatty acid (including the fatty acid in fats and oils) is neutralized.

  In the present invention, it is preferable to add sugar such as honey as a component other than the above as necessary. In particular, honey not only enhances the heat retention effect but also contains isomaltoligosaccharides, gluconolactone, various vitamins, minerals, amino acids, etc. in addition to glucose and fructose, and has high nutritional value. It can be expected to enhance the beauty effect. Other saccharides are preferably solid at room temperature, and mannitol, xylitol, maltitol, erythritol, sorbitol and the like are preferable.

  Saccharides are also preferable because they have an effect of suppressing crystallization in soap and not only contribute to the transparency of solid soap but also improve foaming properties. In addition, these saccharides also have an effect that coloring due to the caramel reaction is less likely to occur in the neutralization step during the production of the soap bar. These saccharides may be used alone or in combination of two or more.

  The soap of the present invention can be blended with various essential oils (essential oils) for the purpose of giving a favorite fragrance. Essential oils include, for example, herbs (lavender, Japanese peppermint, peppermint, lemongrass, rosemary, etc.), trees (juniper, pine, etc.), flower essential oils (rose, jasmine, neroli, chamomile, etc.), citrus (lemon) , Sweet orange, lemon, lime, grapefruit, bergamot, etc.) or those having an oriental (sandalwood, ylang-ylang, etc.) specific fragrance, particularly those having an aromatherapy effect are preferably used. Especially, since red palm oil contains abundant natural carotene and vitamin E, it is expected to repair skin damage and rough skin. These may be used alone or in combination of two or more.

  For example, when emphasizing simplicity and naturalness such as handmade soap, it is preferable that only the above-described components are included and other components are not included. On the other hand, you may make it include the other component of each above-mentioned component according to a use or the objective. For example, nonionic surfactants such as polyoxyethylene (20) sorbitan laurate, polyoxyethylene (20) octyldodecyl ether, polyethylene glycol monolaurate, betaine surfactants, amino acid surfactants, imidazoline Type surfactants, amphoteric surfactants such as amine oxide type surfactants, polyhydric alcohols that are liquid at room temperature such as isoprene glycol, dipropylene glycol, ethoxydiglycol (diethylene glycol monoethyl ether), 1,3-butylene glycol You may mix. These components have a function of suppressing crystallization when producing solid soap by cooling and solidification, and contribute to improving the transparency of the solid soap.

  Mixing polyhydric alcohols that are liquid at room temperature is advantageous in terms of improving foaming and transparency of the resulting solid soap, as well as improving productivity by suppressing crystallization of sugars and decreasing the viscosity of the soap composition during production. It is. Moreover, it is advantageous also in terms of maintaining the hardness of the resulting soap bar and improving foaming.

  In the solid soap of the present invention, by adding a small amount (1 to 3% by weight) of inorganic salts such as sodium chloride, potassium chloride, sodium sulfate, sodium carbonate and sodium nitrate, the hard water resistance is increased. Transparency can be obtained while sufficient foaming is given even to hard water of a degree.

  Moreover, the solid soap of the present invention can contain a non-soap anionic surfactant in order to improve foaming properties at low temperatures and dispersibility of scum. Examples of such anionic surfactants include alkanoyl isethionate, polyoxyethylene alkyl ether sulfate, N-acylmethyl taurate, N-acyl sarcosinate, N-acylated amino acid salt, (di) Examples thereof include alkylsulfosuccinate salts and monoalkyl phosphates.

  Furthermore, the solid soap of this invention can contain organic acids other than a fatty acid for stabilization of fragrance. Examples of such an organic acid include lactic acid and gluconic acid.

  Antibacterial agents such as triclosan and trichlorocarbanilide can be added to the soap bar of the present invention, and moisturizers such as propylene glycol, glycerin, sorbitol, sucrose, lanolin, paraffin, petrolatum, isopropyl myristate, etc. You may mix | blend an oil agent etc.

  Moreover, the solid soap of this invention can also contain the components which are used in the conventional frame kneading soap other than the above-mentioned component, for example, a fragrance | flavor, a pigment, dye, etc. Further, the aloe powder may be blended with a herbal medicine component having a skin care effect for eczema and rough skin.

Next, the manufacturing method of the solid soap of this invention is demonstrated.
In the production of the soap bar of the present invention, first, neat soap (soap base) is prepared by (1) hot process, (2) cold process, or (3) neutralization method described below. Make soap from soap.

<Manufacture of neat soap>
(1) Hot process (pot cooking and saponification)
The hot process is also referred to as a pot cooking saponification method. This is a method for producing soap by heating raw oil and fat contained in a kettle and alkali such as caustic soda (sodium hydroxide) while stirring to cause a saponification reaction. Specifically, it often goes through any of the following saponification salting-out method and squeezing-in method.

A. Saponification salting out After the saponification reaction is finished, salting out removes impurities and obtains a high purity soap. Add caustic soda (NaOH) to the fat and oil and mix well. Heat the mixture of fat and caustic soda to cause a saponification reaction. Salt out the salty soap (soap glue) obtained from the saponification reaction and neat soap. (Soap base), glycerin and impurities. Since pure soap has a property that does not dissolve in electrolytes such as salt water, it can be made a high purity soap by washing the soap glue with salt water many times to remove impurities.

B. A soaking method After the saponification reaction, a method of using soap without salting out can also be employed. In this method, first, caustic soda (NaOH) or caustic potash (KOH) is added to the fat and oil and mixed well, and then the mixture is heated to saponify, and the soap glue obtained by the saponification reaction is finished without salting out. This method does not salt out, so glycerin as well as unreacted oil and impurities in the oil remain as they are in the soap of the product, but the remaining impurities exhibit functions such as moisturizers and are gentle on the skin. Often becomes.

(2) Cold process (cold manufacturing method)
The cold process (cold production method) is a method in which caustic soda (NaOH) is added to fats and oils, stirred and saponified only by heat of reaction, in principle, without being actively heated. In other words, this is a method of saponifying using heat of reaction that occurs naturally only by adding caustic soda (NaOH) to oil and fat and stirring. The obtained soap paste is finished without salting out. In this method, in addition to glycerin, other ingredients other than glycerin and unreacted oil and fatty acids in the oil remain, so the purity of the soap is not so high, but the unreacted oil and other ingredients In some cases, conditions may be set so as to remain, and a fat having a mild cleaning power may be obtained.

(3) Neutralization method The neutralization method is a method in which only a fatty acid obtained by previously decomposing fats and oils is reacted with an alkali compound to form a neat soap (soap base). In this method, fats and oils are decomposed into fatty acids and glycerin in a high-pressure decomposition kettle, and only the obtained fatty acids are neutralized with caustic soda (NaOH) to form neat soap. In this case, since only fatty acids are used from the beginning, salting out to remove impurities is not necessary. In the neutralization method, a specific fatty acid can be selected in the production of soap, and therefore, it is possible to obtain a product that does not contain an irritating lower fatty acid.

<Manufacture of solid soap>
The neat soap (soap base) obtained by frame kneading and mechanical kneading saponification salting-out method or neutralization method is made into a solid soap through steps of drying, blending and molding. In the present invention, the means is not limited. For example, a frame kneading method or a mechanical kneading method described below may be adopted.

(1) Frame kneading method In the frame kneading method, if necessary, add moisturizers, fragrances, pigments, auxiliaries, etc. to neat soap (but no additive in the case of additive-free soap) Pour hot neat soap into a large frame, cool and solidify over a long period of time, and after it cools and solidifies sufficiently, remove the solid soap from the frame, cut it into a certain size, and dry it to remove moisture. After adjustment, the product is stamped with a stamping machine or cut into a predetermined size to obtain a product. Since this frame kneaded soap is gradually cooled over a long period of time, the soap molecules become large crystals, so that it can be made into a soap that is difficult to melt and melt. As described above, the frame-kneaded soap has a property that foaming is slightly inferior to the machine-kneaded soap, but it is difficult to melt and collapse.

(2) Mechanical kneading method In the mechanical kneading method, neat soap is shredded into chips or pellets with a machine and dried. After thoroughly drying, add moisturizing ingredients, fragrances, pigments, auxiliaries, etc. as necessary (if no additive soap, add nothing). After that, knead well with a roll, extrude it into a bar shape with a machine, put it into a cutting and stamping die and make it a soap product by pressure molding etc. In this machine kneading, rapid cooling and In many cases, quick drying is performed, and sufficient drying can be performed, so that the moisture content is low, and the soap particles are gathered during kneading with a strong mechanical force, so that a clean appearance can be obtained. However, contrary to the frame kneading method, there is a tendency that it is easily melted or melted by water. That is, mechanically kneaded soap is a soap that dissolves well in water and has good foaming properties, but has a property that it is slightly melted and broken.

  In addition, about cooling and solidification time, it determines suitably by the kind and compounding quantity of the fats and oils or fatty acid to be used, the compounding quantity of other additives, etc. Further, it varies depending on the material and temperature of the mold, the size and filling amount of the mold, the outside air temperature, the presence or absence of cooling water, and the like.

The bar soap of the present invention obtained as described above is substantially translucent, and when blended with essential oil (essential oil) or the like, has a fragrance and can give a relaxing effect when used.
The bar soap of the present invention is preferably used after about 1 to 3 months have passed since the production. In use, when foaming is insufficient, it is recommended to use soap in a foaming net. Also, it is slightly easier to dissolve than ordinary soap bars, so when storing, it is better to place the bottom of soap bars in contact with air, for example, on a soapy shelf or sponge that is breathable. Is good.

  Hereinafter, the present invention will be described more specifically with reference to examples. However, the scope of the present invention is not limited by these examples.

[Example 1]
As the hot spring water, a sodium chloride / bicarbonate hot spring water (pH value = 7.2) collected in Otemachi, Kokura City, Fukuoka Prefecture was used. The components contained in this hot spring water were as shown in Tables 1-4.

  Soap was manufactured by the cold process (cold manufacturing method) using the above hot spring water. First, alkaline water is prepared by dissolving 75 to 85 g of caustic soda (NaOH) in 240 to 250 ml of this hot spring water, and this alkaline water and the fat and oil components shown in Table 5 are mixed well at 38 to 40 ° C. to obtain honey and essential oil ( Essential oil) was added to prepare a soap composition. Immediately thereafter, the soap composition was placed in a predetermined mold, cooled and solidified to produce a solid soap.

※レッドパーム油は、天然のカロチンとビタミンＥを豊富に含むため、皮膚の傷や荒れ肌の修復を助ける作用を有し、蜂蜜は保温効果を高める作用を有する。

* Red palm oil is rich in natural carotene and vitamin E, so it helps to repair damaged skin and rough skin, and honey has the effect of increasing heat retention.

[Example 2]
In Example 1, solid soap was produced in the same manner as in Example 1 except that the components mixed in the alkaline water prepared using hot spring water were changed to the following composition.

※アロエ粉末は、湿疹や荒れ肌のスキンケア効果を有する。

* Aloe powder has a skin care effect on eczema and rough skin.

These soaps were stored at room temperature for 2 to 3 months after production, and then evaluated by putting them in a foaming net.
In addition, the result at the time of using normal tap water instead of normal hot spring water in Example 1 is shown as Comparative Example 1 for comparison. Moreover, the result at the time of using commercially available soap (Kao White, Kao Corporation make) is shown as Comparative Example 2.
As a result, Example 1 was particularly high in foaming properties, and at the same time, an effect of preventing rough skin was also observed. Further, Example 2 was particularly effective in preventing rough skin, and at the same time, foaming property was also observed.

但し、◎：非常に高い、○：高い、△：中程度、×：低い を示す。

However, ◎: very high, ○: high, Δ: medium, x: low

  ADVANTAGE OF THE INVENTION According to this invention, foaming, especially foaming with respect to hard water is favorable, and the solid soap which has moderate hardness as solid soap is provided. Moreover, even if this bar soap does not contain any special medicinal ingredients, it is gentle to the skin and has an excellent cosmetic effect, so it is useful as a cosmetic soap.

Claims (8)

  A soap bar produced using hot spring water of sodium chloride / bicarbonate spring. As the hot spring water of sodium chloride / bicarbonate springs to be used, hot spring water containing chlorine ions (Cl ⁻ ) and hydrogen carbonate ions (HCO ₃ ⁻ ) as anions at least 30 mbar% is used. The solid soap according to claim 1.   3. The solid soap according to claim 1 or 2, wherein the main soap is sodium chloride / bicarbonate hot spring water, fats and oils, and caustic soda.   The solid soap according to any one of claims 1 to 3, wherein the oil and fat is a vegetable oil mainly composed of olive oil and blended with other vegetable oils.   Furthermore, honey is contained, The solid soap in any one of Claims 1-4 characterized by the above-mentioned.   Furthermore, essential oil is contained, The solid soap in any one of Claims 1-5 characterized by the above-mentioned.   Oil and fat and each component added as needed are dissolved in sodium chloride / bicarbonate hot spring water, caustic soda (NaOH) is added to make neat soap, and this is put into a mold and molded. A method for producing a soap bar, characterized by obtaining a soap bar by cooling. The hot spring water of sodium chloride / bicarbonate spring uses hot spring water containing chlorine ions (Cl ⁻ ) and hydrogen carbonate ions (HCO ₃ ⁻ ) as anions at least 30 mbar%, respectively. The manufacturing method of the solid soap of Claim 7.