阅读说明：本技术 皮肤清洗方法和套件 (Skin cleansing method and kit ) 是由 P·东沙拉姆 T·裕瓦纳科 S·荣育 P·霍姆拉鲁恩 于 2017-11-29 设计创作，主要内容包括：本发明提供一种快速方便的皮肤清洗方法。一种皮肤清洗方法,其包括以下的步骤：(a)在容器中将水和包含碳酸盐和/或碳酸氢盐以及酸的组合物混合以获得液体混合物,其中,容器中的(i)碳酸盐和碳酸氢盐的总含量与(ii)水的质量比[(i)/(ii)]为0.005以上且0.05以下,水相对于容器的内部容积的比例为0.3以上且0.9以下；(b)将包含液体混合物的容器密封；(c)使容器中产生的二氧化碳过饱和；和(d)从容器中释放液体混合物并将该液体混合物施用于皮肤。(The invention provides a rapid and convenient skin cleaning method. A method of skin cleansing comprising the steps of: (a) mixing water and a composition comprising a carbonate and/or bicarbonate salt and an acid in a vessel to obtain a liquid mixture, wherein the mass ratio [ (i)/(ii) ] of (i) the total content of carbonate and bicarbonate salt to (ii) water in the vessel is 0.005 or more and 0.05 or less, and the ratio of water to the internal volume of the vessel is 0.3 or more and 0.9 or less; (b) sealing the container containing the liquid mixture; (c) supersaturating the vessel with carbon dioxide produced; and (d) releasing the liquid mixture from the container and applying the liquid mixture to the skin.)

1. A method for cleaning skin, wherein,

the method comprises the following steps:

(a) mixing water and a composition comprising a carbonate and/or bicarbonate salt and an acid in a vessel to obtain a liquid mixture, wherein the mass ratio (i)/(ii) of (i) the total content of carbonate and bicarbonate salt to (ii) water in the vessel is 0.005 or more and 0.05 or less, and the ratio of water to the internal volume of the vessel is 0.3 or more and 0.9 or less;

(b) sealing the container containing the liquid mixture;

(c) supersaturating the container with carbon dioxide produced; and

(d) releasing the liquid mixture from the container and applying the liquid mixture to the skin.

2. The skin cleansing method according to claim 1,

the composition further comprises a water insoluble or poorly soluble powder.

3. The skin cleansing method according to claim 1 or 2,

the composition further comprises a cooling agent, a conditioning agent, an essential oil and/or a fragrance.

4. The skin cleansing method according to any one of claims 1 to 3,

the container is a container with a lid configured to seal and release the liquid mixture in the container, and step (d) is a step of releasing the liquid mixture through the lid.

5. The skin cleansing method according to any one of claims 1 to 4,

step (c) is a step of shaking the container by hand or stirring the liquid mixture.

6. The skin cleansing method according to any one of claims 1 to 5,

the volume of water in the container is 300m L or more and 3L or less, and the container is made of resin.

7. The skin cleansing method according to any one of claims 4 to 6,

the lid has a dip tube with a length to reach the bottom of the container.

8. The skin cleansing method according to any one of claims 1 to 7,

the composition is a solid selected from the group consisting of granules, powders, tablets and agglomerates.

9. A skin cleanser kit wherein, in the case of a skin cleanser,

comprising a container, a lid, and a composition comprising a carbonate and/or bicarbonate salt and an acid.

Technical Field

The invention relates to a convenient and quick skin cleaning method.

Background

Conventionally, as a method of washing the skin and relaxing, a bath and a shower are widely used. For example, there is known a technique for rapidly eliminating the influence of excessive pressure and making the body and mind comfortable by using a bathing agent containing an extract of cnidium officinale (Cndium officinale) of the family Umbelliferae and/or an extract of chamomilla recutita (Matricaria recutita) of the family Compositae and an extract of peppermint (Mentha) of the family Labiatae and/or an extract of rosemary (Rosmarinus officinalis) of the family Labiatae (patent document 1).

In bathing, a bathing agent which generates carbon dioxide and has an effect of promoting blood circulation is used, and a relaxation effect, a refreshing effect, a fatigue recovery effect, and the like are obtained (patent document 2). As a cleaning technique using carbon dioxide gas, a technique for cleaning a head such as a scalp and a part such as a hip with a specific cleaning device is also known (patent document 3).

(patent document 1) Japanese laid-open patent publication No. 2005-29536

(patent document 2) Japanese laid-open patent publication No. Hei 11-47221

(patent document 3) Japanese laid-open patent publication No. 2003-93262

Disclosure of Invention

The invention relates to a skin cleaning method, which comprises the following steps:

(a) mixing water and a composition comprising a carbonate and/or bicarbonate salt and an acid in a vessel to obtain a liquid mixture, wherein the mass ratio [ (i)/(ii) ] of (i) the total content of carbonate and bicarbonate salt to (ii) water in the vessel is 0.005 or more and 0.05 or less, and the ratio of water to the internal volume of the vessel is 0.3 or more and 0.9 or less;

(b) sealing the container containing the liquid mixture;

(c) supersaturating the vessel with carbon dioxide produced; and

(d) releasing the liquid mixture from the container and applying the liquid mixture to the skin.

Drawings

Fig. 1 shows a schematic view of a container according to the invention.

Fig. 2 shows a schematic view of a cover according to the present invention.

FIG. 3 shows an embodiment of step (a).

FIG. 4 shows an embodiment of step (c).

FIG. 5 shows an embodiment of step (d).

Fig. 6 shows a pouch containing the composition (powder) inside.

Fig. 7 shows an internal filter that can be installed inside a container.

Fig. 8 shows the dip tube when the container is turned upside down.

Fig. 9 shows the size of the orifice, the appearance of the ejection orifice of the cap, and the result of ejecting the liquid mixture.

Detailed Description

Due to cultural and climatic differences, the way skin is cleaned and relaxed varies from country to country. For example, Japanese enjoys a bath and shower, while southeast Asians enjoy pouring water or showering with a bucket.

However, in recent years, the number of people who are busy, work early, and work late at night, and the number of people who enjoy hobbies or social activities overnight have increased regardless of the country or region in which the people live. Meanwhile, when a bath or shower is used to sufficiently wash the skin, it takes several tens of minutes, including washing off the cleanser, drying, and dissipating sweat, etc. Thus, for busy people in recent years, a simple and quick skin cleansing and/or refreshing method that can replace a bath or shower is desired. Pouring water only on the body does complement the desire to wash the skin or refresh in a very short time, but this method hardly washes the body sufficiently and does not provide a long lasting refreshing feeling.

The conventional cleaning technique using carbon dioxide gas is designed for local use, but the structure of the apparatus for the technique is complicated or water supply needs to be installed. Therefore, the cleansing technique is not suitable as a simple, rapid skin cleansing and/or refreshing method, and a new cleansing method is desired to replace the conventional method.

The present invention is therefore directed to providing a new method which allows easy and quick cleaning of the skin without being restricted by the location, for example, the inside or outside of a building.

The inventors have focused on containers that hold water and a carbon dioxide generator comprising a carbonate and/or bicarbonate salt and an acid. The inventor finds that: when the carbon dioxide generating agent is mixed with water in a container and then sealed and the carbon dioxide generated in the sealed container is supersaturated before the container is reopened to eject the carbon dioxide containing solution from the container, it is possible to wash the skin with the carbon dioxide containing solution in a quick and easy manner, to make the skin fresh and to promote blood circulation. Furthermore, the method is not limited to indoor use, but can be performed outdoors, such as in gardens, beaches, mountainous areas, forests, rivers, fields.

The method according to the present invention allows for the rapid and easy spraying of a carbon dioxide containing aqueous liquid mixture onto the skin to impart a cleansing effect, a refreshing effect, etc.

The skin cleansing method according to the present invention comprises the following steps (a), (b), (c) and (d):

(a) mixing water and a composition comprising a carbonate and/or bicarbonate salt and an acid in a vessel to obtain a liquid mixture, wherein the mass ratio [ (i)/(ii) ] of (i) the total content of carbonate and bicarbonate salt to (ii) water in the vessel is 0.005 or more and 0.05 or less, and the ratio of water to the internal volume of the vessel is 0.7 or more and 0.9 or less;

(b) sealing the container containing the liquid mixture;

(c) supersaturating the vessel with carbon dioxide produced; and

(d) releasing the liquid mixture from the container and applying the liquid mixture to the skin.

The respective steps will be explained below.

The skin cleansing method according to the present invention comprises: a container having a sealable lid, water and a composition comprising a carbonate and/or bicarbonate salt and an acid (also referred to as a carbon dioxide generator). In the present invention, the skin may comprise the whole body or a part of the body, including scalp, face, neck, shoulder, chest, abdomen, waist, back, hip, hand, palm, arm, elbow, leg, ankle, foot, toe, sole of the foot, heel, and the like. Among them, the skin cleansing method according to the present invention is preferably a body cleansing method.

The container is not particularly limited as long as it can contain a liquid such as water inside. The container may be a bottle, a pitcher, a jar, a tube, or the like. The container is preferably pressure resistant. As water, not only tap water but also deionized water or mineral water can be used. The container may be made of resin, glass, metal, or the like. As a material for the container, a resin is preferable from the viewpoint of light weight, ease of use, and ease of manufacture. More preferably a polyethylene-based resin, and still more preferably a polyethylene terephthalate (PET) resin as an example shown in fig. 1.

The internal volume of the container is not particularly limited, but from the viewpoint of usability and shower time, the volume of the container that can be filled with water is preferably 300m L or more and 3L or less, and more preferably 350m L or more and 2L or less.

If the size of the container has an internal volume of 400m L or more and 600m L or less, the maximum inner diameter of the container is preferably 50mm or more and 135mm or less, more preferably 55mm or more and 115mm or less, further preferably 60mm or more and 85mm or less, from a similar viewpoint, the height of the container is preferably 200mm or more and 320mm or less, more preferably 200mm or more and 270mm or less, further preferably 200mm or more and 240mm or less.

The skin cleansing method according to the present invention can be easily operated so that even women, children or elderly people can easily control it, and therefore, it does not cause a burden on the body, for example, for women and children, the internal volume is preferably 300m L or more and 1L or less from the viewpoint of improving usability.

In addition, due to its modest size, a sufficient amount of carbon dioxide can be produced by thorough mixing of the carbonate and/or bicarbonate and the acid with the water. When the container has such a size, a continuous washing and refreshing effect can be enjoyed after the liquid mixture is discharged from the container under a moderate pressure.

For the sealing of the liquid mixture in step (b) and for the releasing of the liquid mixture from the container via the lid in step (d), the lid of the container may be configured to seal and release the liquid mixture in the container. The lid may be configured to seal and release the liquid mixture, such as a push-pull lid, flip-top lid, or screw lid. Further, the cap may be provided with an ejection port. One of the embodiments of the cap is a cap having an inner and an outer ejection port, and the liquid mixture is ejected through the inner ejection port and from the outer ejection port. It is preferable to provide an ejection orifice diameter adjusting function in the cap. For example, the cap is preferably configured so that the ejection orifice diameter can be adjusted in a spiral manner.

In terms of the cleaning effect, the refreshing effect and the effect of perhaps promoting blood circulation of the liquid mixture containing carbon dioxide released from the container in step (d), i.e., the carbon dioxide-containing aqueous solution (the liquid mixture may be hereinafter referred to as "carbon dioxide-containing aqueous solution"), the lid provided with a dip tube is also preferable (fig. 2). Further, the dip tube has a length that reaches the bottom of the container.

In the process of the present invention, by step (a), the carbonate and/or bicarbonate is neutralized by an acid and carbon dioxide is produced. The vessel is then sealed by step (b) and the carbon dioxide produced is partially dissolved in the water and partially combined with the air in the headspace (the portion of the vessel other than the liquid mixture) to be in gaseous form. The carbon dioxide gas produced in the headspace exerts pressure on the liquid mixture.

However, by step (d), this pressure is reduced and the liquid mixture is instantaneously drained from the vessel. For instantaneous discharge, one effective method is to invert the container before releasing the liquid mixture, and another method is to use a container that provides a dip tube. In this way, carbon dioxide is released through the tube, and therefore, the effects of the present invention can be enjoyed to some extent continuously.

Hereinafter, a composition containing a carbonate and/or a bicarbonate and an acid (the composition is a carbon dioxide generating agent) will be described.

As described below, the carbonate and/or bicarbonate used in the present invention is a component that generates carbon dioxide by acid neutralization. The carbon dioxide produced is soluble in water and also imparts a cleansing effect and a refreshing feeling when applied to the skin. It is expected to exert the effect of promoting blood circulation.

The carbonate and/or bicarbonate comprises one or more selected from sodium carbonate, sodium bicarbonate, magnesium carbonate, calcium carbonate and potassium carbonate. In particular, from the viewpoint of imparting excellent foamability, i.e., ability to generate bubbles, one or more selected from sodium carbonate and sodium bicarbonate are preferable.

The acid is preferably an organic acid in terms of ensuring storage stability. The organic acid includes, for example, succinic acid, fumaric acid, malic acid, adipic acid, tartaric acid, benzoic acid, citric acid, pyroglutamic acid, salicylic acid, maleic acid, phthalic acid, glutaric acid, oxalic acid, etc., and one or more thereof may be used. Among them, preferred is one or more selected from succinic acid, fumaric acid, malic acid, adipic acid, tartaric acid, benzoic acid, citric acid, pyroglutamic acid and salicylic acid for the same reason. More preferably, one or more selected from the group consisting of succinic acid, fumaric acid, malic acid, adipic acid, tartaric acid and citric acid for the same reason. For the same reason, it is further preferable to select one or more from succinic acid, malic acid and fumaric acid.

The total content of the carbonate and the bicarbonate in the composition is preferably 5% by mass or more and 80% by mass or less, more preferably 10% by mass or more and 60% by mass or less, from the viewpoint of enhancing the carbon dioxide generating effect, the cleaning effect, the refreshing effect, and the blood circulation promoting effect.

For the same reason as described above, the total content of the acid is preferably 10 mass% or more and 80 mass% or less, and more preferably 15 mass% or more and 60 mass% or less.

The composition may comprise additional agents such as water-insoluble or practically water-insoluble powders, cooling agents, uv absorbers, conditioning agents, essential oils, fragrances, excipients, binders, disintegrants, extracts of animals or plants, preservatives, dyes, fragrances, oily ingredients, surfactants, and the like.

According to the skin cleansing method of the present invention, the skin can be cleansed by applying a carbonated aqueous liquid mixture (containing no or a small amount of surfactant) in a fairly sustainable manner for a period of time. Therefore, one embodiment of the present invention contains 2% by mass or less, preferably 1% by mass or less, of the surfactant with respect to the entire composition. This means that one of the embodiments of the present invention comprises a process that is substantially free of surfactant.

The water-insoluble or hardly water-insoluble powder includes silicone powder, bentonite, aluminum potassium sulfate, zinc phenolsulfonate, and the like. The content of the water-insoluble powder is, for example, preferably 0.01% or more and 5% or less, more preferably 0.1% or more and 2% or less, and further preferably 0.2% or more and 1% or less, from the viewpoint of imparting freshness and smoothness to the skin after showering.

Cooling agents include menthol, camphor, mono-menthyl glyceryl ether, menthyl lactate, and the like. The content of the cooling agent in the composition is, for example, preferably 0.01% by mass or more and 5% by mass or less, more preferably 0.01% by mass or more and 0.1% by mass or less, in view of imparting a cooling effect.

Conditioning agents include polyols intended for moisturizing, reducing scale, and promoting the removal of scale from the skin. Typical polyhydric alcohols include polyalkylene glycols, more preferably alkylene polyols and their derivatives, such as propylene glycol, dipropylene glycol, polypropylene glycol, polyethylene glycol, sorbitol, hydroxypropyl sorbitol, hexylene glycol, 1, 3-butylene glycol, 1,2, 6-hexanetriol, ethoxylated glycerol, propoxylated glycerol and mixtures thereof.

Ultraviolet absorbers include p-aminobenzoic acid, octyl p-methoxycinnamate (2-ethylhexyl p-methoxycinnamate), glyceryl mono-2-ethylhexanoyl di-p-methoxycinnamate, silylisopentyl trimethoxycinnamate trisiloxane, and other cinnamate-based ultraviolet absorbers, 2 '-hydroxy-5-methylphenylbenzotriazole, 2- (2' -hydroxy-5 '-tert-octylphenyl) benzotriazole, 2- (2' -hydroxy-5 '-methylphenyl) benzotriazole, 4-methoxy-4' -tert-butyldibenzoylmethane, 5- (3, 3-dimethyl-2-norbornenyl) -3-pentan-2-one, and mixtures thereof, Bis-ethylhexyloxyphenol-methoxyphenyl triazine, 2,4, 6-tris [4- (2-ethylhexyloxycarbonyl) anilino ]1,3, 5-triazine, dimorpholinopyridino-azinone.

The essential oil comprises amber oil, bergamot essential oil, cedar essential oil, chamomile oil, cinnamon oil, citronella oil, cypress oil, eucalyptus oil, geranium oil, ginger oil, grapefruit oil, honey oil, jasmine oil, lavender oil, lemon oil, lime berry oil, lemongrass oil, orange flower oil, perilla oil, rose oil, rosemary oil, sandalwood essential oil, citrus oil, tea tree oil, thyme oil, ylang-ylang oil and the like.

The aromatic includes aldehydes, ketones, esters, etc., in addition to essential oils, but is not limited thereto.

Excipients include, for example, water soluble binders. When the acid is coated with a water-soluble binder, the reaction in the packaging container during storage before use is suppressed, and it can efficiently generate carbon dioxide in use.

The water-soluble binder is preferably at least one selected from the group consisting of polyethylene glycol, polypropylene glycol, polyoxyethylene alkyl ether, and polyoxyethylene phenol ether, and more preferably at least one selected from the group consisting of polyethylene glycol and polypropylene glycol.

From the viewpoint of the equilibrium viscosity control and the operation at the time of pulverization, the number average molecular weight of the water-soluble binder is preferably 4,000 or more and 20,000 or less, more preferably 6,000 or more and 13,000 or less, and further preferably 7,000 or more and 9,000 or less by the GPC method with polystyrene as a standard. For the measurement of polyethylene glycol as a water-soluble binder, a water/ethanol mixture may be used as a solvent.

When a water-soluble binder is used, two or more water-soluble binders having different number average molecular weights may be combined.

From the viewpoint of improving the coating efficiency, the content ratio of the excipient to the acid (excipient/acid) is preferably 2% by mass or more and 20% by mass or less, and more preferably 5% by mass or more and 15% by mass or less. Within the above range, higher solubility in water and higher foamability can be obtained.

The above-mentioned additional agents are not limited to the intended use and may be used for other uses according to the purpose, for example, the fragrance may be used as a cooling agent, or may also be used for other uses than their intended use, for example, as a use having the effects of a fragrance and a cooling agent.

The composition may be in the form of a solid, such as granules, powder, tablets, agglomerates, and the like, from the aspect of rapidly dissolving in water and generating carbon dioxide, and from the aspect of improving the stability of carbonate or bicarbonate. Tablets may be formed by rotary tablet presses, hydraulic tablet presses, eccentric tablet presses, briquetting machines, compactors, and the like.

Among them, tablets are preferable from the viewpoint of easy filling of these into containers. They can generate carbon dioxide in water when they sink toward the bottom of the container, and from the viewpoint of generating a carbon dioxide-containing liquid mixture having an appropriate pressure, they can be dissolved in water preferably for 15 seconds or more and 120 seconds or less, more preferably for 20 seconds or more and 90 seconds or less, further preferably for 25 seconds or more and 70 seconds or less. For a longer duration, it is also preferable to shake the container containing the liquid mixture so that the proportion of carbonate or bicarbonate that is insoluble is kept above 10% and below 30%, preferably above 15% and below 25%. After the initial release of the liquid mixture, the flow rate gradually decreases. However, if undissolved carbonate or bicarbonate (residue) remains in the water, for example, by shaking the container again, carbon dioxide gas can be regenerated.

The average particle diameter of the tablet is preferably 1mm or more and 12mm or less, more preferably 1.5mm or more and 11mm or less, and further preferably 1.8mm or more and 10mm or less. The average particle diameter can be determined as a particle diameter distribution measurable according to JIS K0069. The average height (thickness) is preferably 0.8mm or more and 10mm or less, more preferably 1.0mm or more and 8mm or less, and further more preferably 2mm or more and 7mm or less. In the present invention, the average particle diameter refers to the horizontally largest dimension and the average height refers to the vertically largest dimension under the condition that the tablet is upright. The shape of the tablet is not limited to a particular shape, but may be spherical or non-spherical and/or may be symmetrical or asymmetrical.

Here, the average particle diameter and the average tablet height (thickness) represent an average of the maximum diameter and the maximum height (thickness) of the projected area.

The density of the tablet is not limited as long as it is higher than the density of water (1.0 at 4 ℃), but is preferably 1 or more, more preferably 1 or more, and still more preferably 1.1 or more and 2.5 or less, from the viewpoint that the tablet quickly sinks to the bottom of the water and dissolves in water. The density of a tablet can be calculated by measuring its weight and volume, and then dividing the weight by the volume.

When the average particle diameter and the density of the tablet are within the above ranges, the tablet is moderately dissolved when the tablet is mixed with water to obtain a mixed solution. By "moderately soluble" is meant that most of the tablet dissolves, but there are still some undissolved tablets. A fixed amount of the aqueous solution containing carbon dioxide may be continuously applied to the skin by the method of the present invention. For this reason, it is preferred that the tablet does not immediately dissolve completely and some of it does not dissolve in the liquid mixture. That is, when the pressure is weakened during the application of the carbon dioxide-containing liquid mixture to the skin, the carbon dioxide gas can be further generated by taking the step of generating carbon dioxide again after changing the state of the container from the release state to the sealed state. Thus, a carbonated aqueous solution having sufficient pressure to clean and impart a refreshing feel may be continuously applied to the skin.

From the viewpoint of rapid dissolution in water, a powder is preferred. The time for dissolving the powder in water is, for example, preferably 1 second or more and 20 seconds or less, more preferably 5 seconds or more and 20 seconds or less, and still more preferably 5 seconds or more and 10 seconds or less. The average particle diameter contained in the powder is not limited, but is preferably 0.01mm or more and 12mm or less, for example. The average particle diameter can be determined as a particle diameter distribution measurable according to JIS K0069. The apparent density can be measured according to JIS K3362. In addition, an anti-caking agent is preferably contained in the powder from the viewpoint of preventing caking of the powder. Preferred anti-caking agents include MgO, SiO₂、Ca₂O₄Si、Mg₃Si₄O₁₀(OH)₂Talc, kaolin, bentonite, and the like.

Indeed, powders are preferred from the standpoint of rapid dissolution in water, but dissolution too quickly may result in rapid reaction of the carbonate and/or bicarbonate with the acid. Possibly resulting in spillage of the liquid mixture. The powder may be stored in a porous or water-soluble pouch to delay dissolution of the powder in water, taking into account the equilibrium dissolution rate. The sachet having the powder contained therein may be placed into the container of step (a).

Fig. 6 shows an embodiment in which a composition comprising carbonate and/or bicarbonate and acid (as the plurality of powders 10) is enclosed in a tetrahedral pouch 100. The material of the pouch 100 is not particularly limited as long as it retards the dissolution of the composition in water, but the pouch may be made of a mesh material, filter paper, non-woven fabric (e.g., polyethylene), water-soluble film (e.g., polyvinyl alcohol), or the like. In fig. 6, the powder 10 is enlarged for better understanding. For example, the powder may be placed in a sachet prior to filling it into a container. The sachet prevents the powder from coming into direct contact with water and delays its dissolution in water.

In another embodiment, the composition may be placed in an internal filter. Fig. 7 shows an embodiment of the internal filter 20. The inner filter 20 is provided with a plurality of mesh holes 22. The inner filter 20 is configured to be attachable inside the container. For example, when the composition is a powder, the powder may be placed into an internal filter disposed in the container of step (a). The filter structure delays the dissolution of the composition in water. In fig. 7, the inner filter 20 is provided with a cap receiver 24 at the upper end. In fig. 7, the cap receiver 20 is configured to be connectable with a cap by a screw structure. Additionally or alternatively, the cap receiver 20 may be configured to be attached to the ejection port via a screw to easily discharge the liquid mixture.

In step (a), water and a composition comprising a carbonate and/or bicarbonate salt and an acid are mixed in a container to obtain a liquid mixture (fig. 3), that is, for example, (i) the liquid mixture is introduced into the container by introducing the above composition into the container containing water, by adding the above composition to water and then immediately introducing the liquid mixture into the container, (ii) the water and the above composition are introduced into the container simultaneously or separately, or (iii) the water is introduced into the container comprising the above composition, thereby mixing the water and the above composition in the container the volume of the water introduced into the container is not limited, but may be 300m L or more and 3L or less, more preferably 350m L or more and 2L or less, still more preferably 350m L or more and 1L or less within the internal volume of the container.

Here, from the viewpoint of obtaining a sufficiently high concentration of the carbon dioxide-containing aqueous solution and from the viewpoint of obtaining a sufficient ejection force, the mass ratio [ (i)/(ii) ] of the total content of (i) carbonate and bicarbonate to (ii) water in the vessel is preferably 0.005 or more and 0.5 or less, more preferably 0.006 or more and 0.3 or less, and further more preferably 0.007 or more and 0.1 or less. In the present invention, the total content of (i) carbonate and bicarbonate refers to the amount to be introduced into water or the amount to be introduced into the composition.

From the viewpoint of obtaining a sufficiently high concentration of the carbon dioxide-containing aqueous solution and imparting a sufficient injection force, the mass ratio [ (iii)/(ii) ] of the composition (iii) to the water (ii) in the container is preferably 0.007 to 0.08, more preferably 0.009 to 0.06, and further more preferably 0.01 to 0.05.

From the viewpoint of obtaining a carbon dioxide-containing aqueous solution of high concentration, and from the viewpoint of generating a sufficient amount of carbon dioxide when the container is shaken in step (c), the ratio of water to the internal volume of the container (volume ratio) (water/internal volume) is preferably 0.3 or more and 0.9 or less, more preferably 0.5 or more and 0.9 or less, and further preferably 0.7 to 0.9.

From the viewpoint of obtaining a high-concentration carbon dioxide-containing aqueous solution, and from the viewpoint of generating a sufficient amount of carbon dioxide when the step of generating carbon dioxide in step (c) is taken, the volume ratio (headspace/liquid mixture) of the headspace after the step of generating carbon dioxide in step (c) to the carbon dioxide-containing liquid mixture is preferably 0.1 or more and 2.3 or less, more preferably 0.1 or more and 1.0 or less, and still more preferably 0.1 or more and 0.4 or less.

The temperature of the water used is preferably 20 ℃ or higher and 43 ℃ or lower from the viewpoint of solubility of the carbonate or bicarbonate and a refreshing feeling when the liquid mixture is sprayed onto the skin. The temperature of the water used is preferably 20 ℃ to 35 ℃, more preferably 25 ℃ to 35 ℃ from the viewpoint of enhancing the refreshing effect. From the viewpoint of improving the warming effect, the temperature is preferably 30 ℃ or more and 42 ℃ or less, and more preferably 38 ℃ or more and 42 ℃ or less.

Step (b) is a step of sealing the container containing the liquid mixture. In particular, the container may be sealed with the above-described sealable lid.

Step (c) is a step of supersaturating the vessel with carbon dioxide produced therein. Examples of the step of generating carbon dioxide include a method such as standing the container and shaking the container by hand or stirring the liquid mixture by a machine. From the viewpoint of efficiently generating carbon dioxide in a short time, it is preferable to shake the container by hand (fig. 4). By this step (c), a large amount of carbon dioxide can be produced in the liquid mixture.

According to the object of the invention, the frequency of shaking the container can be varied. For example, if one wishes to obtain a powerful pressure from a carbon dioxide-containing aqueous solution, the container may be shaken at high frequency. Otherwise, if it is desired to enjoy this application for a long time, the container may be shaken at a low frequency. This frequency can be determined by observing the extent to which the carbonate or bicarbonate dissolves in the water. For longer duration, it is preferred to shake the container so that preferably 70% to 90%, more preferably 75% to 85% of the carbonate or bicarbonate is dissolved into the water.

Step (d) is a step of releasing the liquid mixture from the container and applying the liquid mixture to the body (fig. 5). Specifically, when the container is opened, since a large amount of carbon dioxide is generated inside the container, the liquid mixture pushed out by the gas pressure is vigorously sprayed from the container. Thus, the sprayed liquid mixture can be applied to the body.

Here, from the viewpoint of easy cleaning and short time, the total ejection time of the liquid mixture is preferably 15 seconds or more and 3 minutes or less, more preferably 30 seconds or more and 2 minutes or less, and further more preferably 45 seconds or more and 90 seconds or less. In order to adjust the ejection time within this range, the ejection speed may be adjusted, and is determined by the mass ratio of the total content of carbonate and bicarbonate in the container to water and the proportion of water with respect to the internal volume of the above container, the amount of water in the container, the inner and outer diameters of the ejection port of the container, and the like. The position of the ejection port is not limited, and an ejection port is provided in the container in one embodiment, and an ejection port is provided in the cap in another embodiment. The ejection port includes an outer port and an inner port. The outer opening is visible from the exterior of the container, while the inner opening is the other side of the outer opening. The liquid mixture should pass through the inner port and then be ejected from the outer port.

The number of ejection ports of the container or the inner and outer diameters of each ejection port may not be limited. The number of the ejection ports is one or more, preferably 1 or more and 60 or less, more preferably 1 or more and 40 or less. Another embodiment of the number of the ejection openings depends on the ratio of the outer diameter of the ejection openings to the diameter of the shower area and the ratio of the total area of the ejection openings to the shower area. The spray area is defined as an area having a single ejection orifice or several ejection orifices arranged in a pattern having an imaginary circle drawn from the farthest point at the edge of the outermost orifice to another orifice. The ratio of the outer diameter of the discharge port to the diameter of the shower area is preferably 0.01 or more and 0.3 or less, and more preferably 0.05 or more and 0.17 or less. The ratio of the total area of the discharge ports to the shower area is preferably 0.01 or more and 0.2 or less, and more preferably 0.03 or more and 0.1 or less. The inner diameter of the ejection orifice is preferably 0.01mm or more and 5mm or less, and more preferably 0.1mm or more and 4mm or less. The outer diameter of the ejection port is preferably 0.01mm or more and 5mm or less, and more preferably 0.1mm or more and 4mm or less.

The form of the ejection orifice is represented by the relationship between an ejection orifice on the outer outlet side from which the liquid mixture is ejected and an ejection orifice on the inlet side to the ejection side. That is, the shape of the ejection port may be a conical shape in which the diameter of the ejection port increases or decreases from below (from the lower portion of the container toward the ejection port), may be vertically straight, or may be inclined from below or inclined from above. As shown in fig. 9, specific examples include one conical ejection port whose ejection port diameter increases from the lower direction, 2 to 30 direct ejection ports, and 2 to 30 ejection ports inclined from the lower direction.

When a sufficient amount of carbon dioxide is generated inside the container by the step (c) of supersaturating the carbon dioxide generated in the container, the ejection time of the liquid mixture can be sufficiently increased when the inner diameter of the ejection orifice is reduced, for example, when the volume of the liquid mixture is 400m L or more and 1L or less, the inner diameter of each ejection orifice can be 1mm or more and 4mm or less when the ejection time is intended to be adjusted to 45 seconds or more and 2 minutes or less, preferably 45 seconds or more and 90 seconds or less.

The shape of the ejection orifice may be circular, elliptical, polygonal, etc., and is not particularly limited. From the aspect of applying the liquid mixture to the desired site in a constant manner, a circular shape is preferred.

Figure 8 shows the dip tube in the container when the container is turned upside down. In this embodiment, the dip tube has a weight at the tip. When the container is turned upside down, the tip of the dip tube will be lowered, thereby keeping the liquid mixture from draining from the container regardless of the volume reduction of the mixture. The dip tube is preferably a flexible tube with a weight attached to it to easily bend when the container is turned upside down.

Steps (b) to (d) or steps (c) to (d) may be repeated after step (d).

The method according to the invention may also comprise the further step of: a step (e) of squeezing the container to release the liquid mixture. Further, the method according to the invention may also be applied after or before the application of a conventional shower without carbonate. The method according to the invention may comprise a method without any further steps, wherein no rinsing step or drying step is included.

By spraying a liquid mixture containing a large amount of carbon dioxide onto the skin, the skin surface can be cleaned, and a refreshing effect on the skin surface and perhaps an effect of promoting blood circulation can be obtained. Moreover, these effects can be obtained by a simple action in a short time. Above all, since the water and the composition comprising carbonate and/or bicarbonate are prepared separately before use, but are only mixed at the time of use, the process according to the invention allows to release a higher content of carbon dioxide mixture.

Furthermore, the method according to the invention allows not only the delivery of higher amounts of carbon dioxide mixtures to the whole body, but also the delivery of cooling agents, uv absorbers, conditioners, fragrances and the like to the whole body by using compositions containing these agents. That is, the present invention can be used as a leave-on cosmetic that does not require a rinsing step with water.

The invention also relates to a skin cleanser kit. The skin cleanser kit of the present invention may include a container, a cap and a composition comprising a carbonate and/or bicarbonate salt and an acid, all as described above. A skin cleansing kit may be used in the skin cleansing method of the present invention.

In the above embodiment, the present invention further discloses the following cleaning method.

<1> a skin cleansing method, comprising the steps of:

(a) mixing water and a composition comprising a carbonate and/or bicarbonate salt and an acid in a vessel to obtain a liquid mixture, wherein the mass ratio [ (i)/(ii) ] of (i) the total content of carbonate and bicarbonate salt to (ii) water in the vessel is 0.005 or more and 0.05 or less, and the ratio of water to the internal volume of the vessel is 0.7 or more and 0.9 or less;

(b) sealing the container containing the liquid mixture;

(c) producing carbon dioxide in a vessel; and

(d) releasing the liquid mixture from the container and applying the liquid mixture to the skin.

<2> the skin cleansing method according to <1>, wherein the container is made of resin, preferably a polyethylene-based container, more preferably polyethylene terephthalate (PET).

<3> the skin cleansing method according to <1> or <2>, wherein the internal volume of the container is preferably 300m L or more and 3L or less, more preferably 350m L or more and 2L or less.

<4> the skin cleansing method according to any one of <1> to <3>, wherein the maximum inner diameter of the container is preferably 50mm or more and 135mm or less, more preferably 55mm or more and 115mm or less, further preferably 60mm or more and 85mm or less, and/or the height of the container is preferably 200mm or more and 320mm or less, more preferably 200mm or more and 270mm or less, and further preferably 200mm or more and 240mm or less.

<5> the skin cleansing method according to any one of <1> to <4>, wherein the container includes a cap provided with an ejection port, and the cap is configured to be sealable.

<6> the skin cleansing method according to any one of <1> to <5>, wherein the container further comprises a dip tube having a length reaching a bottom of the container.

<7> the skin cleansing method according to any one of <1> to <6>, wherein the dip tube is a flexible tube to which a weight is attached to be easily bent when the container is turned upside down.

<8> the skin cleansing method according to any one of <1> to <7>, wherein the acid is an organic acid, preferably one or more selected from the group consisting of succinic acid, fumaric acid, malic acid, adipic acid, tartaric acid, benzoic acid, citric acid, pyroglutamic acid, salicylic acid, more preferably one or more selected from the group consisting of succinic acid, fumaric acid, malic acid, adipic acid, tartaric acid, benzoic acid, citric acid, and further preferably one or more selected from the group consisting of succinic acid, fumaric acid, and malic acid.

<9> the skin cleansing method according to any one of <1> to <8>, wherein the total content of the carbonate and the bicarbonate is 5% by mass or more and 80% by mass or less, more preferably 10% by mass or more and 60% by mass or less, and/or the amount of the acid is 10% by mass or more and 80% by mass or less, more preferably 15% by mass or more and 60% by mass or less.

<10> the skin cleansing method according to any one of <1> to <9>, wherein the composition further comprises one or more of a water-insoluble or hardly water-insoluble powder, a cooling agent, an ultraviolet absorber, a conditioner, an essential oil, a fragrance, an excipient, a binder, a disintegrant, an extract of an animal or plant, a preservative, a dye, a perfume, an oily ingredient and a surfactant.

<11> the skin cleansing method according to <10>, wherein the water-insoluble or almost water-insoluble powder is selected from the group consisting of silicone powder, bentonite, aluminum potassium sulfate and zinc phenolsulfonate.

<12> the skin cleansing method according to <10>, wherein the cooling agent is selected from the group consisting of menthol, camphor, mono menthyl glyceryl ether and menthyl lactate.

<13> the skin cleansing method according to <10>, wherein the ultraviolet absorber is selected from the group consisting of p-aminobenzoic acid, octyl p-methoxycinnamate (2-ethylhexyl p-methoxycinnamate), glyceryl mono-2-ethylhexanoyl di-p-methoxycinnamate, silylisopentyl trimethoxycinnamate trisiloxane and other cinnamate-based ultraviolet absorbers, 2 '-hydroxy-5-methylphenylbenzotriazole, 2- (2' -hydroxy-5 '-tert-octylphenyl) benzotriazole, 2- (2' -hydroxy-5 '-methylphenyl) benzotriazole, 4-methoxy-4' -tert-butyldibenzoylmethane, 5- (3, 3-dimethyl-2-norbornenyl) -3-pentan-2-one, and mixtures thereof, Bis-ethylhexyloxyphenol-methoxyphenyl triazine, 2,4, 6-tris [4- (2-ethylhexyloxycarbonyl) anilino ]1,3, 5-triazine, dimorpholinopyridino-azinone.

<14> the skin cleansing method according to <10>, wherein the conditioning agent is selected from the group consisting of propylene glycol, dipropylene glycol, polypropylene glycol, polyethylene glycol, sorbitol, hydroxypropyl sorbitol, hexylene glycol, 1, 3-butylene glycol, 1,2, 6-hexanetriol, ethoxylated glycerin and propoxylated glycerin.

<15> the skin cleansing method according to <10>, wherein the essential oil is selected from the group consisting of amber oil, bergamot essential oil, cedar essential oil, chamomile oil, cinnamon oil, citronella oil, cypress oil, eucalyptus oil, geranium oil, ginger oil, grapefruit oil, honey oil, jasmine oil, lavender oil, lemon oil, lime berry oil, lemongrass oil, orange blossom oil, perilla oil, rose oil, rosemary oil, sandalwood essential oil, citrus oil, tea tree oil, thyme oil, ylang oil.

<16> the skin cleansing method according to any one of <1> to <15>, wherein the composition is a tablet.

<17> the skin cleansing method according to <16>, wherein the average particle diameter of the tablet is preferably 1mm or more and 12mm or less, more preferably 1.5mm or more and 11mm or less, and still more preferably 1.8mm or more and 10mm or less.

<18> the skin cleansing method according to any one of <1> to <17>, wherein a mass ratio of (i) a total content of carbonate and bicarbonate to (ii) water [ (i)/(ii) ] is preferably 0.006 or more and 0.3 or less, more preferably 0.007 or more and 0.1 or less.

<19> the skin cleansing method according to any one of <1> to <18>, wherein the mass ratio [ (iii)/(ii) ] of the (iii) composition to the (ii) water in the container is preferably 0.007 or more and 0.08 or less, more preferably 0.009 or more and 0.06 or less, further more preferably 0.01 or more and 0.05 or less.

<20> the skin cleansing method according to any one of <1> to <19>, wherein a ratio of water to an internal volume of the container (volume ratio) is preferably 0.3 or more and 0.9 or less, more preferably 0.5 or more and 0.9 or less, and further more preferably 0.7 or more and 0.9 or less.

<21> the skin cleansing method according to any one of <1> to <20>, wherein the temperature of the water used is preferably 20 ℃ or more and 43 ℃ or less, more preferably 20 ℃ or more and 35 ℃ or less and/or 30 ℃ or more and 43 ℃ or less.

<22> the skin cleansing method according to any one of <1> to <21>, wherein the ejection time of the liquid mixture is preferably 15 seconds or more and 3 minutes or less, more preferably 30 seconds or more and 2 minutes or less, and further more preferably 45 seconds or more and 90 seconds or less.

<23> the skin cleansing method according to any one of <1> to <20>, wherein the container is provided with one or more ejection ports, preferably 1 or more and 60 or less ejection ports, more preferably 1 or more and 40 or less ejection ports.

<24> the skin cleansing method according to any one of <1> to <23>, wherein an inner diameter of the ejection orifice is preferably 0.01mm or more and 5mm or less, more preferably 0.1mm or more and 4mm or less, and/or an outer diameter of the ejection orifice is preferably 0.01mm or more and 5mm or less, more preferably 0.1mm or more and 4mm or less.

<25> the skin cleansing method according to any one of <1> to <24>, wherein the ejection orifice has a conical shape in which a diameter of the ejection orifice increases from a lower direction, a vertically straight shape, or a shape inclined from a lower direction.

<26> the skin cleansing method according to any one of <1> to <15>, wherein the composition is a powder and the powder is put in a pouch before being put in a container.

<27> the skin cleansing method according to any one of <1> to <15>, wherein the composition is a powder, and the powder is put into an internal filter provided in a container.