CN111405929A - Skin cleansing method and kit - Google Patents

Abstract

The invention provides a quick and convenient skin cleaning method. A skin cleansing method comprising the steps of: (a) mixing water and a composition comprising carbonate and/or bicarbonate and an acid in a container to obtain a liquid mixture, wherein (i) in the container The mass ratio [(i)/(ii)] of the total content of carbonate and bicarbonate to (ii) water is 0.005 or more and 0.05 or less, and the ratio of water to the internal volume of the container is 0.3 or more and 0.9 or less; (b) sealing the container containing the liquid mixture; (c) supersaturating the carbon dioxide produced in the container; and (d) releasing the liquid mixture from the container and applying the liquid mixture to the skin.

Description

Skin cleansing method and kit

technical field

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

Background technique

Conventionally, as a method of cleansing the skin and relaxing, tub baths and showers are widely used. For example, there is known a technique for quickly eliminating the effects of excessive stress and soothing the mind and body using a body wash containing an extract of Japanese Chuanxiong (Cndium officinale) of the Umbelliferae and/or chamomile (Matricaria recutita) of the Compositae family ) and an extract of Mentha (Mentha) of Lamiaceae and/or an extract of Rosemary (Rosmarinus officinalis) of Lamiaceae (Patent Document 1).

In bathing, a carbon dioxide-generating body wash having 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). In addition, as a cleaning technique using carbon dioxide gas, a technique of cleaning the head such as the scalp and the buttocks 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

SUMMARY OF THE INVENTION

The present invention relates to a kind of skin cleaning method, wherein, comprises the following steps:

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

(b) sealing the container containing the liquid mixture;

(c) supersaturate the carbon dioxide produced in the vessel; and

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

Description of drawings

[ Fig. 1 ] A schematic view showing a container according to the present invention.

[ Fig. 2 ] A schematic view showing a cap according to the present invention.

[ Fig. 3 ] An embodiment of step (a) is shown.

[FIG. 4] An embodiment of step (c) is shown.

[ Fig. 5 ] An embodiment of step (d) is shown.

[Fig. 6] A pouch containing a composition (powder) inside is shown.

[Fig. 7] shows an internal filter that can be installed inside the container.

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

[ FIG. 9 ] shows the size of the hole, the appearance of the ejection port of the cap, and the result of ejecting the liquid mixture.

Detailed ways

Skin cleansing and relaxation methods vary from country to country due to cultural and climatic differences. For example, Japanese prefer tubs and showers, while Southeast Asians prefer to pour water from buckets or shower.

However, in recent years, regardless of the country or region people live in, the number of people who are busy, get up early and work late, and stay up late to enjoy hobbies or social activities has increased. Meanwhile, when bathing or showering to fully wash the skin, it takes tens of minutes, including rinsing 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 tub or shower is desired. Merely pouring water on the body does complement the expectation of cleansing or refreshing the skin in a short amount of time, but this method hardly cleans the body sufficiently, nor does it provide a lasting refreshment.

Conventional cleaning techniques using carbon dioxide gas are designed for topical use, but devices used for this technique have complex structures or require the installation of a water supply. Therefore, this cleansing technique is not suitable as a simple, quick skin cleansing and/or refreshing method, and a new cleansing method is desired to replace the conventional method.

Therefore, the present invention is concerned with providing a new method that can easily and quickly clean the skin without limitation of location, such as inside or outside a building.

The present inventors focused on a container containing water and a carbon dioxide generator comprising carbonate and/or bicarbonate and acid. The inventors have found that when a carbon dioxide generator is mixed with water in a container, then sealed, and the carbon dioxide produced in the sealed container is supersaturated before reopening the container to eject the carbon dioxide-containing solution from the container, It cleanses the skin with a carbon dioxide-containing solution in a quick and easy way, refreshes the skin and improves blood circulation. Furthermore, the method is not limited to indoor use, but can be performed outdoors, such as in gardens, beaches, mountains, forests, riversides, fields.

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

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

(b) sealing the container containing the liquid mixture;

(c) supersaturate the carbon dioxide produced in the vessel; and

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

Each step will be described below.

The skin cleansing method according to the present invention comprises: a container having a sealable lid, water and a composition comprising carbonate and/or bicarbonate and an acid (also known as a carbon dioxide generator). In the present invention, the skin may comprise the entire body or parts of the body, including the scalp, face, neck, shoulders, chest, abdomen, waist, back, buttocks, hands, palms, arms, elbows, legs, ankles, feet, toes, Sole, heel, etc. 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 accommodate a liquid such as water therein. The container may be a bottle, pitcher, jar, 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, resins are preferable from the viewpoints of light weight, usability, and ease of manufacture. Polyvinyl resin is more preferable, and polyethylene terephthalate (PET) resin as an example shown in FIG. 1 is still more preferable.

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

The size of the container may vary depending on the application and may not be absolutely determined. If the size of the container has an internal volume of 400 mL or more and 600 mL or less, from a similar viewpoint, the maximum inner diameter of the container is preferably 50 mm or more and 135 mm or less, more preferably 55 mm or more and 115 mm or less, and further preferably 60 mm or more and 85 mm or less . The height of the container is preferably 200 mm or more and 320 mm or less, more preferably 200 mm or more and 270 mm or less, and further preferably 200 mm or more and 240 mm or less. In the present invention, the maximum inner diameter of the container is defined such that when the container is upright, it is the maximum inner diameter among the diameters of the horizontal cross-section of the container. If the cross section is not circular, it is the diameter of an imaginary circle with equal area.

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

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

In terms of sealing the liquid mixture in step (b), and in terms of releasing 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 can be configured to seal and release the liquid mixture, such as a push-pull lid, flip-top lid, or screw-on lid. In addition, the cover may be provided with an ejection port. One of the embodiments of the cap is a cap with inner and outer spouts, and the liquid mixture passes through the inner spout and out from the outer spout. It is preferable to provide a discharge port diameter adjustment function in the cap. For example, the cap is preferably configured such that the diameter of the ejection opening can be adjusted in a helical manner.

Just in step (d) the liquid mixture containing carbon dioxide is released from the container and continuously exhibits the cleaning effect, refreshing effect of the liquid mixture, namely the carbon dioxide-containing aqueous solution (the liquid mixture may be hereinafter referred to as "carbon dioxide-containing aqueous solution) As well as perhaps for the effect of promoting blood circulation, it is also preferable to provide a cover of the dip tube (Fig. 2). Furthermore, the dip tube has a length that can reach 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 container is then sealed by step (b) and the carbon dioxide produced is partially dissolved in water and partially combined with air in the headspace (the part of the container other than the liquid mixture) 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 expelled from the vessel. For instant discharge, one effective method is to invert the container before releasing the liquid mixture, another method is to use a container that provides a dip tube. By this method, carbon dioxide is released through the tube, and therefore, the effects of the present invention can be continuously enjoyed to some extent.

Hereinafter, the composition (this composition is a carbon dioxide generator) containing carbonate and/or bicarbonate and an acid is demonstrated.

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

Carbonate and/or bicarbonate include 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, that is, the ability to generate bubbles, one or more selected from the group consisting of sodium carbonate and sodium bicarbonate are preferred.

In terms of ensuring storage stability, the acid is preferably an organic acid. Organic acids include, 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, and the like , one or more of them can be used. Among them, for the same reason, 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 and salicylic acid are preferred. For the same reason, more preferred is 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, one or more selected from the group consisting of succinic acid, malic acid and fumaric acid are further preferred.

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

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

The composition may contain additional agents such as water-insoluble or nearly water-insoluble powders, cooling agents, UV absorbers, conditioners, essential oils, fragrances, excipients, binders, disintegrants, animal Or plant extracts, preservatives, dyes, fragrances, oily ingredients, surfactants, etc.

According to the skin cleansing method of the present invention, the skin can be washed by applying a carbon dioxide-containing aqueous liquid mixture (containing no or a small amount of surfactant) for a period of time in a fairly sustainable manner. Therefore, one Embodiment of this invention contains 2 mass % or less of surfactant with respect to the whole composition, Preferably it is 1 mass % or less. This means that one of the embodiments of the present invention comprises a substantially surfactant-free method.

Water-insoluble or almost water-insoluble powders include silicone powder, bentonite, potassium aluminum sulfate, zinc phenolsulfonate, and the like. In terms of imparting freshness and smoothness to the skin after showering, 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%. the following.

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

Conditioners include polyols designed to moisturize, reduce limescale, and facilitate removal of buildup from the skin. Typical polyols include polyalkylene glycols, more preferably alkylene polyols and derivatives thereof, such as propylene glycol, dipropylene glycol, polypropylene glycol, polyethylene glycol, sorbitol, hydroxypropyl sorbitol, hexane Diols, 1,3-butanediol, 1,2,6-hexanetriol, ethoxylated glycerol, propoxylated glycerol, and mixtures thereof.

UV absorbers include p-aminobenzoic acid, octyl p-methoxycinnamate (2-ethylhexyl p-methoxycinnamate), glyceryl mono-2-ethylhexanoyl di-p-methoxycinnamate, Silylisoamyltrimethoxycinnamate trisiloxane and other cinnamic acid-based UV absorbers, 2,2'-hydroxy-5-methylphenylbenzotriazole, 2-(2'- Hydroxy-5'-tert-octylphenyl)benzotriazole, 2-(2'-hydroxy-5'-methylphenyl)benzotriazole, 4-methoxy-4'-tert-butyldiazole Benzoylmethane, 5-(3,3-dimethyl-2-norbornenyl)-3-pentan-2-one, bis-ethylhexyloxyphenol-methoxyphenyltriazine, 2,4,6-Tris[4-(2-ethylhexyloxycarbonyl)anilino]1,3,5-triazine, dimorpholinopyridoazinone.

Essential oils include amber oil, bergamot oil, cedarwood 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, Pear berry oil, lemongrass oil, neroli oil, perilla oil, rose oil, rosemary oil, sandalwood oil, citrus oil, tea tree oil, thyme oil, ylang ylang oil, etc.

In addition to essential oils, fragrances include, but are not limited to, aldehydes, ketones, esters, and the like.

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

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

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, by the GPC method using polystyrene as a standard from the viewpoint of balancing viscosity control and operation during pulverization. More preferably, it is 7,000 or more and 9,000 or less. To measure polyethylene glycol as a water-soluble binder, a water/ethanol mixture can be used as 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 mass % or more and 20 mass % or less, and more preferably 5 mass % or more and 15 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 can be used for other purposes depending on the purpose, for example, the fragrance can be used as a cooling agent, or can also be used for other purposes than their intended use, for example, as a fragrance-containing agent and the effect of cooling agents.

The composition may be in the form of a solid, such as granules, powders, tablets, agglomerates, and the like, in terms of rapidly dissolving in water and generating carbon dioxide, as well as improving the stability of carbonate or bicarbonate salts. Tablets can be formed by rotary presses, hydraulic presses, eccentric presses, briquette presses, compactors, and the like.

Among them, tablets are preferable from the viewpoint of being easy to put them in a container. Carbon dioxide can be generated in the water when they sink toward the bottom of the container, and from the viewpoint of generating a carbon dioxide-containing liquid mixture with an appropriate pressure, they can preferably be 15 seconds or more and 120 seconds or less, more preferably 20 seconds or more and 90 seconds. seconds or less, more preferably 25 seconds or more and 70 seconds or less, are dissolved in water. For longer durations, it is also preferred to shake the container containing the liquid mixture to keep the insoluble carbonate or bicarbonate ratio above 10% and below 30%, preferably above 15% and below 25%. After the liquid mixture started to be released, the flow rate was gradually reduced. 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 1 mm or more and 12 mm or less, more preferably 1.5 mm or more and 11 mm or less, and further preferably 1.8 mm or more and 10 mm or less. The average particle size can be determined as a particle size distribution that can be measured according to JIS K 0069. The average height (thickness) is preferably 0.8 mm or more and 10 mm or less, more preferably 1.0 mm or more and 8 mm or less, and still more preferably 2 mm or more and 7 mm or less. In the present invention, under the condition that the tablet is upright, the average particle size refers to the largest horizontal dimension, and the average height refers to the largest vertical dimension. The shape of the tablet is not limited to a particular shape, but may be spherical or aspherical and/or may be symmetrical or asymmetrical.

Here, the average particle diameter and the average tablet height (thickness) represent the average value of the maximum diameter and the average value of 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°C), but from the viewpoint that the tablet quickly sinks to the bottom and dissolves in water, it is preferably 1 or more, more preferably more than 1, still more preferably It is 1.1 or more and 2.5 or less. 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 density of the tablets are within the above ranges, the tablets are moderately dissolved when the tablets are mixed with water to obtain a mixed solution. "Moderately dissolved" means that most of the tablet dissolves, but there are still some undissolved tablets. A fixed amount of the carbon dioxide-containing aqueous solution can be continuously applied to the skin by the method of the present invention. For this reason, it is preferred that the tablets do not dissolve completely immediately and some of them do 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, 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 released state to the sealed state. Thus, a carbon dioxide-containing aqueous solution having sufficient pressure to cleanse and impart a refreshing feel can be continuously applied to the skin.

From the viewpoint of being rapidly dissolved in water, 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 0.01 mm or more and 12 mm or less, for example. The average particle size can be determined as a particle size distribution that can be measured according to JIS K 0069. Apparent density can be measured according to JIS K 3362. In addition, from the viewpoint of preventing the powder from caking, an anti-caking agent is preferably contained in the powder. Preferred anti _- caking agents include MgO, _SiO2 , _Ca2O4Si , _{Mg3Si4O10 (OH)2 , talc} , kaolin, bentonite, and the like.

Indeed, powders are preferred from the standpoint of rapid dissolving in water, but dissolving too quickly may result in a rapid reaction of carbonate and/or bicarbonate with acid. Liquid mixture may spill. Considering the equilibrium dissolution rate, powders can be stored in porous or water-soluble pouches to delay the dissolution of powders in water. The pouch containing the powder can be placed in the container of step (a).

FIG. 6 shows an embodiment in which a composition comprising carbonate and/or bicarbonate and an acid (as various powders 10 ) is enclosed in a tetrahedral pouch 100 . The material of the pouch 100 is not particularly limited as long as it delays the dissolution of the composition in water, but the pouch may be made of mesh material, filter paper, non-woven fabric (eg, polyethylene), water-soluble film (eg, polyvinyl alcohol), etc. . In Figure 6, powder 10 is enlarged for better understanding. For example, the powder can be placed in a pouch before filling the container. The sachet prevents direct contact of the powder with water and delays its dissolution in water.

In another embodiment, the composition can be placed in an internal filter. FIG. 7 shows an embodiment of the inner filter 20 . The inner filter 20 is provided with a plurality of meshes 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 in an internal filter disposed in the container of step (a). The filter structure delays the dissolution of the composition in water. In Figure 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 to the cap via a threaded structure. Additionally or alternatively, the cap receiver 20 may be configured to be attached to the spout via a screw to easily drain the liquid mixture.

In step (a), water and the composition comprising carbonate and/or bicarbonate and acid are mixed in a vessel to obtain a liquid mixture (Figure 3). That is, for example, (i) by introducing the above composition into a container containing water, by adding the above composition to water and then immediately introducing the liquid mixture into the container, (ii) by introducing the water and the above composition simultaneously or into the container separately, or (iii) introducing water into the container containing the above composition, whereby the water and the above composition are mixed in the container. The volume of water introduced into the container is not limited, but may be 300 mL or more and 3 L or less, more preferably 350 mL or more and 2 L or less, and even more preferably 350 mL or more and 1 L or less within the inner volume of the container. In one embodiment, it is preferable that the volume of water in the container is 300 mL or more and 3 L or less, and that the container is made of resin.

Here, from the viewpoint of obtaining a sufficiently high-concentration carbon dioxide-containing aqueous solution and obtaining a sufficient ejection force, the mass ratio of (i) the total content of carbonate and bicarbonate to (ii) water in the container [(i) )/(ii)] is preferably 0.005 or more and 0.5 or less, more preferably 0.006 or more and 0.3 or less, and still more preferably 0.007 or more and 0.1 or less. In the present invention, (i) the total content of 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 carbon dioxide-containing aqueous solution and imparting a sufficient injection force, the mass ratio of the (iii) composition to (ii) water in the container [(iii)/(ii)]) is preferably 0.007 or more and 0.08 or less, more preferably 0.009 or more and 0.06 or less, still more preferably 0.01 or more and 0.05 or less.

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 container is shaken in step (c), the ratio (volume ratio) of water to the internal volume of the container (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, still more preferably 0.7 to 0.9.

From the viewpoint of obtaining a high-concentration carbon dioxide-containing aqueous solution, and from the viewpoint of producing a sufficient amount of carbon dioxide when the step (c) is performed, the headspace after the step (c) producing carbon dioxide and the carbon dioxide-containing The volume ratio of the liquid mixture (headspace/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 to be used is preferably 20°C or higher and 43°C or lower from the viewpoints of the solubility of carbonate or bicarbonate and the refreshing feeling when the liquid mixture is sprayed onto the skin. From the viewpoint of improving the refreshing effect, the temperature of the water to be used is preferably 20°C or higher and 35°C or lower, and more preferably 25°C or higher and 35°C or lower. From the viewpoint of enhancing the heating effect, the temperature is preferably 30°C or higher and 42°C or lower, and more preferably 38°C or higher and 42°C or lower.

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

Step (c) is a step of supersaturating the carbon dioxide produced in the vessel. Examples of the step of generating carbon dioxide include methods such as standing the container and shaking the container by hand or agitating 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.

Depending on the purpose of the present invention, the frequency with which the container is shaken can be varied. For example, if a strong pressure is desired from an aqueous solution containing carbon dioxide, the container can be shaken at high frequency. Otherwise, if you want to enjoy this application for a long time, you can shake the container at low frequency. This frequency can be determined by looking at how much carbonate or bicarbonate dissolves in the water. For longer durations, the container is preferably shaken in order to dissolve preferably 70% to 90%, more preferably 75% to 85% of the carbonate or bicarbonate in the water.

Step (d) is the step of releasing the liquid mixture from the container and applying the liquid mixture to the body (Figure 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 violently ejected 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 spray 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 still more preferably 45 seconds or more and 90 seconds or less. . In order to adjust the spraying time within this range, the spraying speed can be adjusted, and the spraying speed is determined by the mass ratio of the total content of carbonate and bicarbonate in the container to the water and the ratio of water to the internal volume of the container, the container The amount of water in the container, the inner diameter and outer diameter of the outlet of the container, etc. are determined. The position of the ejection port is not limited, and one embodiment is to provide the ejection port in the container, and another embodiment is to provide the ejection port in the lid. The ejection port includes an outer port and an inner port. The outer port is visible from the outside of the container, and the inner port is the other side of the outer port. The liquid mixture should pass through the inner port and then spray out 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 ejection ports is one or more, preferably 1 or more and 60 or less, and more preferably 1 or more and 40 or less. Another embodiment of the number of jets depends on the ratio of the outer diameter of the jets to the diameter of the spray area and the ratio of the total area of the jets to the spray area. The spray area is defined as the area with a single jet or several jets arranged in a pattern with an imaginary circle drawn from the furthest point at the edge of the outermost port to the other port. 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 port 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 discharge port is preferably 0.01 mm or more and 5 mm or less, and more preferably 0.1 mm or more and 4 mm or less. The outer diameter of the discharge port is preferably 0.01 mm or more and 5 mm or less, and more preferably 0.1 mm or more and 4 mm or less.

The form of the ejection port is represented by the relationship between the ejection port on the external outlet side from which the liquid mixture is ejected, and the ejection port on the inlet side leading to the ejection side. That is, the shape of the spout may be a cone in which the diameter of the spout increases or decreases from below (from the lower part of the container toward the spout), may be straight, or may be inclined from below or downward from above tilt. As shown in FIG. 9 , specific examples include one conical ejection port whose ejection port diameter increases from the lower direction, 2 to 30 straight ejection ports, and 2 to 30 ejection ports inclined from the lower direction.

By adjusting the inner diameter of the ejection port, the time for ejecting the liquid mixture from the container can be adjusted. That is, 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, when the inner diameter of the jetting port is reduced, the jetting time of the liquid mixture can be sufficiently increased. For example, when the volume of the liquid mixture is 400 mL or more and 1 L 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 inner diameter of each ejection port may be 1 mm or more. and 4mm or less.

The shape of the ejection port may be a circle, an ellipse, a polygon, etc., and is not particularly limited. From the point of view of applying the liquid mixture to the desired site in a constant manner, circular shapes are preferred.

Figure 8 shows the dip tube in the container when the container is turned upside down. In this embodiment, the diptube has a weight at the tip. When the container is turned upside down, the tip of the dip tube lowers, keeping the liquid mixture expelled from the container regardless of the reduced volume of the mixture. The dip tube is preferably a flexible tube with weights attached 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 present invention may also comprise an additional step: step (e) of squeezing the container to release the liquid mixture. Further, the method according to the invention can also be applied after or before the application of a conventional shower without carbonates. The method according to the present 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 surface of the skin can be washed, and a refreshing effect can be obtained on the surface of the skin, and perhaps a blood circulation-boosting effect can be obtained. Moreover, these effects can be obtained in a very short time with simple actions. Most importantly, the method according to the invention can release higher levels of carbon dioxide mixtures because the water and the carbonate and/or bicarbonate containing composition are prepared separately before use, but only mixed at the time of use .

Furthermore, the method according to the present invention can not only release higher levels of carbon dioxide mixtures to the whole body, but also through the use of compositions containing cooling agents, UV absorbers, conditioners, fragrances, etc. to release these agents throughout the body. That is, the present invention can be used as a leave-in cosmetic that does not require a step of rinsing with water.

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

With regard to the above-described embodiments, the present invention further discloses the following cleaning methods.

<1> A skin cleansing method comprising the following steps:

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

(b) sealing the container containing the liquid mixture;

(c) making carbon dioxide in a container; and

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

<2> The skin washing 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 inner volume of the container is preferably 300 mL or more and 3 L or less, and more preferably 350 mL or more and 2 L 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 50 mm or more and 135 mm or less, more preferably 55 mm or more and 115 mm or less, further preferably 60 mm or more and 85 mm or less, and/or the height of the container is preferably 200 mm or more and 320 mm or less, more preferably 200 mm or more and 270 mm or less, and further preferably 200 mm or more and 240 mm or less.

<5> The skin washing 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 includes a dip tube whose length can reach the bottom of the container.

<7> The skin washing method according to any one of <1> to <6>, wherein the dip tube is a flexible tube to which a weight is attached so as 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 selected from the group consisting of succinic acid, fumaric acid, malic acid, adipic acid, tartaric acid, benzene One or more of formic acid, citric acid, pyroglutamic acid, and salicylic acid, more preferably one or more selected from succinic acid, fumaric acid, malic acid, adipic acid, tartaric acid, benzoic acid, and citric acid. one or more, more preferably one or more selected from 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 carbonate and bicarbonate is 5% by mass or more and 80% by mass or less, more preferably 10% by mass or more and 60 mass % or less, and/or the amount of acid is 10 mass % or more and 80 mass % or less, more preferably 15 mass % or more and 60 mass % or less.

<10> The skin cleansing method according to any one of <1> to <9>, wherein the composition further comprises a water-insoluble or almost water-insoluble powder, a cooling agent, an ultraviolet absorber, a conditioning agent, an essential oil , one or more of fragrances, excipients, binders, disintegrants, animal or plant extracts, preservatives, dyes, fragrances, oily ingredients and surfactants.

<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, monomenthyl 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, silylisoamyltrimethoxycinnamate trisiloxane and other cinnamic acid-based UV absorbers, 2,2'-hydroxy- 5-Methylphenylbenzotriazole, 2-(2'-hydroxy-5'-tert-octylphenyl)benzotriazole, 2-(2'-hydroxy-5'-methylphenyl)benzene Triazole, 4-methoxy-4'-tert-butyldibenzoylmethane, 5-(3,3-dimethyl-2-norbornenyl)-3-pentan-2-one, Bis-ethylhexyloxyphenol-methoxyphenyltriazine, 2,4,6-tris[4-(2-ethylhexyloxycarbonyl)anilino]1,3,5-triazine, bis Morpholinopyridoazinone.

<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-Butanediol, 1,2,6-hexanetriol, ethoxylated glycerol and propoxylated glycerol.

<15> The skin cleansing method according to <10>, wherein the essential oil is selected from the group consisting of amber oil, bergamot essential oil, cedarwood 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, pear berry oil, lemongrass oil, neroli oil, perilla oil, rose oil, rosemary oil, sandalwood oil, citrus oil, tea tree oil, Thyme Oil, Ylang 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 1 mm or more and 12 mm or less, more preferably 1.5 mm or more and 11 mm or less, further preferably 1.8 mm or more and 10 mm or less.

<18> The skin cleansing method according to any one of <1> to <17>, wherein the mass ratio of (i) the total content of carbonate and bicarbonate to (ii) water is [(i)/(ii) )] is preferably 0.006 or more and 0.3 or less, and 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 (ii) water in the container is preferably It is 0.007 or more and 0.08 or less, more preferably 0.009 or more and 0.06 or less, and still 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 the ratio (volume ratio) of water to the internal volume of the container is preferably 0.3 or more and 0.9 or less, more preferably 0.5 or more and 0.9 Hereinafter, it is 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°C or higher and 43°C or lower, more preferably 20°C or higher and 35°C or lower and/ or above 30°C and below 43°C.

<22> The skin cleansing method according to any one of <1> to <21>, wherein the spraying 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, More preferably, it is 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 the inner diameter of the ejection port is preferably 0.01 mm or more and 5 mm or less, more preferably 0.1 mm or more and 4 mm or less, and/or The outer diameter of the discharge port is preferably 0.01 mm or more and 5 mm or less, and more preferably 0.1 mm or more and 4 mm or less.

<25> The skin cleansing method according to any one of <1> to <24>, wherein the jetting port has a conical shape in which the jetting port diameter increases from below, a vertically straight shape, or a shape from below upward sloping shape.

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

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

Example

The present invention is explained in more detail by examples, but the scope of the present invention is not limited to these examples.

Example 1

(1) Preparation of tablets

Tablet A, Tablet B, and Tablet C shown in Table 1 were mixed and compression-molded by a tablet manufacturing apparatus.

(2) Device

A capped PET bottle (mouth diameter: approx. 2.5 cm; bottle height: approx. 20.5 cm; body diameter: approx. 6.6 cm) is provided where when the PET bottle is filled with 400 mL of water, 123 mL of headspace will be created. The cap is provided with a screw-type resealable mechanism and ejection ports (shape: straight, number of ejection ports: 6) having a diameter of 1 mm or more and 4 mm or less.

[Table 1]

*Other ingredients of Tablet A: Dextrose, PEG6000, MgO, Ca ₂ O ₄ Si, Silicate, Sucrose Fatty Acid Esters, Glycine, Flavor and Colorant.

*Other ingredients of Tablet B: Al ₂ (SO ₄ ) ₃ ·16H ₂ O, menthol, tea extract, polyoxyethylene (caprylic/capric) glycerides, ethanol, flavors and colorants.

*Other ingredients of tablet C: MgSO ₄ , anhydrous NaSO ₄ , soybean oil, PEG(120), polyoxyethylene polyoxypropylene ethylenediamine tetra, PVP, BHT, flavors and colorants.

(3) Evaluation

(3-1) First emission test

The cap of the above-mentioned PET bottle was opened, and 400 mL of water at 30° C. was introduced. Then, the above-mentioned composition (8 grams for Examples 1-1, 1-2 and 1-3; 4 grams for Example 1-4; 30 grams for Example 1-5) was introduced, and PET bottles were used according to the table 3. The lid is sealed. The bottle was shaken 30 times with one hand at an amplitude of 30 cm, the bottle was opened, and the carbon dioxide-containing aqueous solution was released until the last possible drop was discharged in one discharge, regardless of the remaining composition in the liquid mixture for another round of discharge. Measure the volume and time of the first discharge to determine the average volumetric flow rate.

(3-2) Evaluation of clean skin feel

The cap of the above-mentioned PET bottle was opened, and 400 mL of water at 30° C. was introduced. Then, the above-mentioned composition (8 grams for Examples 1-1, 1-2 and 1-3; 4 grams for Example 1-4; 30 grams for Example 1-5) was introduced, and PET bottles were used according to the table 3. The lid is sealed. Shake the bottle 30 times with one hand at an amplitude of 30 cm, open the bottle, release the carbon dioxide-containing aqueous solution, and apply to the arm of a professional rater, then reseal the bottle and shake again a few times, then repeat the same application steps to complete all contents. Meanwhile, pour water onto the other arm. Each of the five evaluators who performed the above application performed sensory evaluation on the clean feeling by touching the skin after wiping the arm with a towel according to the five-level evaluation criteria shown below. An average of the scores from five raters was determined.

5: Clear and clean feeling / not sticky at all

4: Cleans better than water alone/less sticky

3: Feels no different from applying water alone/slightly sticky

2: Poor cleaning/sticky

1: Not at all clean/very sticky

(3-3) Evaluation of refreshing skin feeling

The cap of the above-mentioned PET bottle was opened, and 400 mL of water at 30° C. was introduced. Then, the above-mentioned composition (8 grams for Examples 1-1, 1-2 and 1-3; 4 grams for Example 1-4; 30 grams for Example 1-5) was introduced, and PET bottles were used according to the table 3. The lid is sealed. Shake the bottle 30 times with one hand at an amplitude of 30 cm, open the bottle, release the carbon dioxide-containing aqueous solution, and apply it to the arm of a professional rater, then reseal the bottle and shake a few times, then repeat the same application steps to Complete all contents. Meanwhile, pour water onto the other arm. Each of the five evaluators who performed the above application performed sensory evaluation on the refreshing feeling after wiping the arm with a towel according to the five-level evaluation criteria shown below. An average of the scores from five raters was determined.

5: Clear refreshing feeling

4: The refreshing feeling is better than using water alone

3: Feels no different than using water alone

2: hardly refreshing

1: Not refreshing at all

The results are shown in Table 2. The results in Table 2 show that the method is applicable to various compositions, such as Examples 1-1, 1-2, and 1-3, and can be achieved by changing the mass ratio of carbonate and bicarbonate to water, such as Examples 1-1, 1-2 and 1-3 1-1 to 1-5 to get the desired discharge.

[Table 2]

The method is also applied to the whole body or parts of the body such as chest, arms, shoulders, abdomen and legs for 14 seconds to more than 1 minute and imparts cleanliness and refreshment by using the formula, container and lid as described above .

Example 2

Provide a PET bottle with a cap (mouth diameter: about 2.5cm; bottle height: about 20.5cm; bottle diameter: about 6.6cm), when 400mL of water is filled in the PET bottle, it will generate 123mL of headspace. The cover is provided with a screw-type sealable mechanism and a spout. As shown in #1, #2 and #3 of Fig. 7, the ejection port of the cap was changed, and the ejection state of the liquid mixture from the ejection port was investigated using Tablet B in Table 1 (see Table 3).

[table 3]

By this operation, regardless of the mode of the cover, the sweat on the arm is also washed cleanly, and a further refreshing feeling is obtained.

Example 3

(1) Composition Tablet C in Table 1 was used in this example.

(2) Device

A capped PET bottle (about 2.5cm in diameter, 20.5cm in height, and 6.6cm in diameter) with a cap will create a headspace of 123mL when 400mL of water is filled in the PET bottle. Use cap #2 from Table 3. The dip tube was attached to the cap of Examples 2-5.

(3) First emission test

The test was carried out in the same manner as in Example 1, except that the bottle was shaken 30 to 60 times with one hand in an amplitude of 10 cm or 30 cm. In Table 4, "Remaining composition in liquid mixture prior to discharge" indicates whether this method can be used again after the first discharge by resealing and shaking the bottle.

(4) Evaluation of clean skin feel

The test was performed in the same manner as described in Example 1, except that the bottle was shaken 30 to 60 times with one hand in steps of 10 cm or 30 cm.

(5) Evaluation of refreshing skin feeling

The test was carried out in the same manner as in Example 1, except that the bottle was shaken 30 to 60 times with one hand in an amplitude of 10 cm or 30 cm.

Conditions and results are shown in Table 4.

The conditions shown in Table 4 and their results show that agitation prior to discharge can result in discharge at different desired ejection rates and times, eg Examples 2-1, 2-2, 2-3 and 2- 4, while Examples 2-5 show that draining can be performed in the presence of a dip tube.

[Table 4]

Through this operation, the sweat on the arm is washed cleanly, and a refreshing feeling is further obtained. Also, the skin is slightly reddish, possibly due to the effect of promoting blood circulation.

Example 4

(1) Comparison method of the present invention

Example 2-1 (see Table 4) was compared to a comparative method such as (1) a normal shower with water only for the same application time; and (2) by applying the liquid mixture to the chest, Arms, shoulders, abdomen and legs, and then wiped with a towel to flow the mixture composition with the same volume of liquid mixture with a common tool (bucket), the volume of the liquid mixture of the present invention was found to be smaller than the usual use volume of the bucket.

(2) Evaluation method

Five respondents rated the cleaning ability, flexibility during use, and mobility of the unit by moving it from one place to another after applying the three cleaning methods described above, in terms of superiority , with scores of "A", "B", "and "C", from highest to lowest.

Conditions and results are shown in Table 5. Clearly, the present invention exhibits performance superior to that of Comparative Examples (1) and (2).

[table 5]

Claims (9)

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.

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