JP6816066B2 - Footbath warming method and footbath warming set - Google Patents

Description

The present invention relates to a footbath warming method and a footbath warming set using a solid bath agent.

A technique is known in which the legs, which are the lower limbs, are inserted into a boots-shaped tank to reduce the pressure around the blood vessels in the legs, and the blood flow increases in response to negative pressure only in the blood vessels around the legs as the heart beats. (Patent Document 1).

According to this technique, muscle fatigue can be improved, but a device for maintaining a negative pressure environment is required. On the other hand, a footbath warming method called a footbath has been known from the past, and it is practiced to fill a tool such as a bucket with hot water at home, but it is difficult to obtain a sustainable warming effect. Is.

Therefore, a carbon dioxide gas generator for generating carbon dioxide gas / steam in the lower limb cover is known (Patent Document 2).

According to this technology, carbon dioxide and steam are raised inside the lower limb cover, so it is not only a technology that is far from easy use at home, but also a long-lasting warming effect can be obtained. There wasn't.

Japanese Unexamined Patent Publication No. 2011-10994 Japanese Unexamined Patent Publication No. 2008-113750

Therefore, a first object of the present invention is to provide a footbath warming method and a footbath warming set that can be easily used at home or the like and can obtain a sustained lower limb warming effect.

A second object of the present invention is to provide a footbath warming method and a footbath warming set that can further sustain the lower limb warming effect by a combination configuration of a specific solid bath agent and a specific boots-shaped soft tank. ..

Other objects of the present invention are clarified by the following description.
In the present invention, "amount" represents "mass" unless otherwise specified, and "%" represents "mass%" unless otherwise specified.

The present invention that solves the above problems has the following configuration.

[Invention 1]
It contains a carbonate and an organic acid, the carbonate is sodium hydrogen carbonate or potassium hydrogen carbonate, the organic acid is at least one of citric acid, fumaric acid, succinic acid, and malic acid, and the following group A A solid bath agent containing at least one selected from the above, which substantially does not contain a surfactant and / or a bicarbonate ion blocking substance, and has a degree of abrasion of 10.0 wt% or less.
A solid bath having a pH of 5.5 to 9.0 immediately after being dissolved in hot water.
It is characterized by injecting a solution dissolved in a boots-shaped soft tank or a solution of the solid bath agent into the boots-shaped soft tank, and obtaining a long-lasting warming effect of the lower limbs inserted into the boots-shaped soft tank by bicarbonate ions. How to warm the footbath.
[Group A]
Sodium n-octane sulfonate, sodium n-heptane sulfonate, sodium tetradecene sulfonate, sodium coconut oil fatty acid ethyl ester sulfonate [Invention 2]
The footbath warming method according to the above invention 1, wherein the hardness of the solid bath agent is 15 kg or more.
[Invention 3]
The footbath warming method according to the above invention 1 or 2, wherein the diameter and thickness of the solid bath agent are 7 mm or more.
[Invention 4]
The footbath warming method according to any one of the above inventions 1 to 3, wherein the solid bath agent contains at least one selected from the following.
[Group B]
Isopropylmethylphenol, salicylic acid, tricloic acid, glycyrrhizic acid, β-glycyrrhizic acid, trichlorocarbanilide, benzalkonium chloride [Invention 5]
It contains a carbonate and an organic acid, the carbonate is sodium hydrogen carbonate or potassium hydrogen carbonate, the organic acid is at least one of citric acid, fumaric acid, succinic acid, and malic acid, and the following group A A solid bath agent containing at least one selected from the above, which substantially does not contain a surfactant and / or a bicarbonate ion blocking substance, has a degree of abrasion of 10.0 wt% or less, and is dissolved in hot water. Immediately after, a solid bath having a pH of 5.5 to 9.0 and
Composed of a combination with a boots-shaped soft tank,
The solid bath agent is dissolved in the boots-shaped soft tank, or a solution in which the solid bath agent is dissolved is injected into the boots-shaped soft tank, and the warming effect of the lower limbs inserted into the boots-shaped soft tank by bicarbonate ions is maintained. A footbath bathing set characterized by having a structure that gives sex.
[Group A]
Sodium n-octane sulfonate, sodium n-heptane sulfonate, sodium tetradecene sulfonate, sodium coconut oil fatty acid ethyl ester sulfonate [Invention 6]
The footbath bathing set according to the above invention 5, wherein the hardness of the solid bathing agent is 15 kg or more.
[Invention 7]
The footbath bathing set according to the above invention 5 or 6, wherein the solid bathing agent has a diameter and a thickness of 7 mm or more.
[Invention 8]
The footbath bathing set according to any one of the above inventions 5 to 7, wherein the solid bathing agent contains at least one selected from the following.
[Group B]
Isopropylmethylphenol, salicylic acid, tricloic acid, glycyrrhizic acid, β-glycyrrhizic acid, trichlorocarbanilide, benzalkonium chloride [Invention 9]
Any of the above inventions 5 to 8, wherein the boots-shaped soft tank is disposable with a flexible material having a thickness of 1 mm or less, and has a protruding portion on the inner surface of the bottom of the tank so that the sole of the foot is separated from the bottom of the tank. Footbath bathing set described in Crab.
[Invention 10]
The footbath bathing set according to any one of the above inventions 5 to 9, wherein the boots-shaped soft tank has a protruding portion on the inner surface of the tank body that separates the skin of the lower limbs from the surface of the tank body.
[Invention 11]
The footbath bathing set according to any one of the above inventions 5 to 10, wherein the protruding portion is a protrusion or a piece of tongue.
[Invention 12]
The footbath bathing set according to any one of the above inventions 5 to 11, wherein the boots-shaped soft tank has a heat insulating member that keeps the hot water in the soft tank warm when the lower limbs are inserted.
[Invention 13]
The footbath bathing set according to any one of the above inventions 5 to 12, wherein the heat insulating member has a heat insulating lid portion crowned on the upper end opening edge of the boots-shaped soft tank.
[Invention 14]
The footbath bathing set according to any one of the above inventions 5 to 13, wherein the heat insulating lid has a lower limb insertion hole in the center thereof and a cut that separates the lid portion from the lower limb insertion hole.

According to the present invention, carbon dioxide gas generated as microscopic bubbles from a solid bath agent put into hot water water stretched in a boots-shaped soft tank rapidly changes to bicarbonate ions depending on the pH of the hot water water. It dissolves in hot water, suppresses escape into the air, and efficiently dissolves as bicarbonate ions at a high concentration. Bicarbonate ions are quickly absorbed into the skin of the lower limbs and their blood vessels, increasing blood flow and lower limbs. It has become possible to provide a footbath warming method and a footbath warming set that can obtain a long-lasting warming effect.
That is, the present invention is characterized in that it has become possible to provide a footbath warming method and a footbath warming set that can obtain a sustainable lower limb warming effect in a footbath using a boots-shaped soft tank. We succeeded in investigating this point.

Further, according to the present invention, by realizing a solid bath having a high concentration of bicarbonate ion and a solution pH specified, bicarbonate ion can exist freely, and the free bicarbonate ion removes the mineral attached to the skin of the lower limbs, and the bicarbonate ion thereof is removed. It is now possible to remove the lower limb odor caused by mineral stains. That is, in the present invention, "mineral stain" has the following meaning.
The coat (body hair) is said to be a mineral outlet, and unnecessary minerals (calcium, magnesium, potassium, sodium, etc.) in the body are discharged from the pores and become mineral stains. That is, if this mineral content is left as it is, it adheres to the skin together with sebum and accumulates, causing stubborn stains and odor.
This mineral content is a positive ion that is electrostatically bound to the negatively charged skin, etc., and if a bicarbonate ion that is strongly negatively charged than the skin, etc. is used, this mineral stain is attracted and washed away. We have found that this is possible.

According to the present invention, which is substantially free of surfactants, bicarbonate ions can be present more freely, and free hydrogen ions can also be present, which enhances the cleaning effect of mineral stains and has a higher health effect. It was possible to provide a footbath warming method and a footbath warming set, and the effect of the present invention was remarkable.

Further, according to the present invention, the solid bath agent can be solidified into powders, granules, tablets, etc., and more active generation of carbon dioxide gas can be obtained at a specific neutral to weak alkaline pH, and a remarkable effect of the invention can be obtained. In particular, according to the inventions 2, 3 and 4, the neutralization reaction can be activated when the tablet is added, and the effect of the present invention is remarkable.

According to the inventions 2, 3 and 4, carbon dioxide gas can efficiently continuously generate micro-sized carbon dioxide gas bubbles having a certain diameter or less for a long time, and the pH of the aqueous solution after the solid bath agent is dissolved can be easily adjusted. It can be neutralized to bicarbonate ions and dissolved at a high concentration, and it can maintain a sufficient carbon dioxide gas concentration without impairing the neutralization reactivity in the solid bath, especially citric acid, succinic acid, etc. The skin affinity of fumaric acid and malic acid enhances the transdermal absorption of carbon dioxide, making it possible to provide a footbath warming method and footbath warming set with high health and beauty effects. Furthermore, in the case of citric acid, the effect is very high.

According to the present invention, the solid bath agent can be made into a tablet, for example, and the acidic component inside the tablet dissolves in a high concentration and comes into contact with each other to easily cause a neutralization reaction, and the micro-sized fine carbon dioxide gas inside the tablet. Efficiently generate bubbles, micro-sized bubbles can be continuously generated for a long period of time, the concentration of carbon dioxide component dissolved in water can be maximized, and the effect of the present invention is remarkable. it can.

Perspective view of boots-shaped soft tank according to the present invention Cross-sectional view showing the footbath as above Perspective view showing an isolated soft member having a tongue piece as a protrusion Partial notch side view in footbath when the above isolated soft member is used Perspective view showing a heat insulating lid for heat retention

First, the boots-shaped soft tank according to the present invention will be described. 1 is a boots-shaped soft tank, which is formed of natural or synthetic rubber or soft synthetic resin, and when a leg is inserted, it is connected to the tank body 2. It has a size that forms a gap (G) between them, and also has a size that forms a gap (G) between the foot portion and the tank foot portion 3. Further, a protrusion 5 is provided between the sole of the foot and the bottom of the tank 4 in contact with the sole of the foot, and a gap (G) is also formed between the sole of the foot and the bottom of the tank 4.

A protruding portion 6 is provided to hold a gap (G) between the tank body 2 and the leg, and the protruding portion 6 is preferably a protrusion 6a or a tongue piece 6b. As shown in FIG. 2, it is preferable that the former protrusions 6a project from each other with a gap between them and the protrusions 6a adjacent to each other.

On the other hand, as shown in FIG. 3, it is preferable that the latter tongue piece 6b is scattered and projected with a gap between the tongue pieces 6b adjacent to each other. In this case, as shown in FIG. 4, when the leg is inserted into the soft tank 1, the tip of each tongue piece 6b is curved downward while being pressed by the foot to form a gap G.

The boots-shaped soft tank 1 according to the present invention preferably uses a heat insulating lid 7 that keeps the hot water in the soft tank 1 warm with the legs inserted, and the heat insulating lid 7 is crowned on the upper end opening edge of the soft tank 1. It has a heat insulating lid portion 8 to be formed, the lid portion 8 has a leg insertion hole 9, and has a cut 10 for separating the lid portion 8.
In addition, in order to maintain the heat retention of hot water, a configuration such as binding and closing the upper end edge of the soft tank 1 with a binding tool or the like may be adopted.

According to this one embodiment, when a leg is inserted through the leg insertion hole 9 of the heat insulating lid 7 crowned on the upper end edge of the boots-shaped soft tank 1, the lid portion 8 having the cut 10 becomes a leg due to the presence of the cut 10. It curves downward while in contact with the skin of the soft tank 1 to block the hot water and the outside air of the soft tank 1, and the heat retention of the hot water can be maintained.
The boots-shaped soft tank 1 according to the present invention may be used (structure) for either a plurality of uses or a single use (structure), and in particular, by adopting a single-use structure (so-called disposable), it is unspecified in a sports venue or the like. A large number of people can enjoy the footbath effect of the present invention.
If the tongue pieces 6b shown in FIG. 3 are continuously projected in the lateral direction without interruption, the heat insulating and heat retaining effect on the hot water in the boots-shaped soft tank 1 is also exhibited.
In the present invention, a solution in which the following solid bathing agent is dissolved (dissolved hot water) is injected into the boots-shaped soft tank 1, or hot water is filled in the boots-shaped soft tank 1 and the following solid bathing agent is added to dissolve hot water. It may be any of the above.
Hereinafter, the solid bath agent according to the present invention will be described.

The present inventors present 28% or more of carbon dioxide as bicarbonate ions, especially at pH 6.2 or higher, and these bicarbonate ions do not destroy the barrier layer of the skin at all and remove stains including old keratin. However, it was found that bicarbonate ions can be ion-encapsulated to remove mineral stains on the legs that could not be sufficiently removed with a surfactant.

In addition, despite being a footbath, bicarbonate ions are percutaneously absorbed, improving blood flow, parasympathetic nerves dominate, and you can relax very much, and you can get a good sleep (deep sleep). The inventors have determined.

When the compound selected from the following group B is at least 0.03% by mass to 0.18% by mass, the effect of the present invention is satisfactorily exhibited. Furthermore, it was found that within this range, the bactericidal action appears well and the effects of the present invention are synergistically produced.
[Group B]
Isopropylmethylphenol, salicylic acid, tricloic acid, glycyrrhizic acid, β-glycyrrhizic acid, trichlorocarbanilide, benzalkonium chloride

The present invention preferably contains water-soluble silicon or a water-soluble silicon compound, and when the content thereof is 0.5% by mass to 5.0% by mass, the effect of the present invention is satisfactorily exhibited.

Further, when the solid bath agent is a tablet-type bath agent, the tablet hardness is preferably 15 kg or more, particularly 25 kg or more, which is effective for the stability of tablet molding. When the degree of abrasion of the tablet is 10.0 wt% or less, the acidic component inside the tablet dissolves in a high concentration and comes into contact with each other to easily cause a neutralization reaction, and the generation of fine micro-sized carbon dioxide bubbles inside is efficient. It can be raised well, micro-sized bubbles can be continuously generated for a long time, the concentration of carbon dioxide component dissolved in water can be maximized, and the effect of the present invention can be remarkable. When the degree of abrasion is 5.0 wt% or less, the bubbles of the fine carbon dioxide gas having a micro size are generated more efficiently, and the effect of the present invention is more preferably exhibited, and the degree of abrasion is 3.0 wt% or less. Is the most preferable.

A method for measuring the degree of abrasion of a tablet according to the present invention will be described. The degree of abrasion is the tablet abrasion degree tester (
Put the tablets in Kayagaki Medical Science Industry Co., Ltd.) so that the tablet weight is 31 g or more. For example, when the weight of one tablet is 15 g, three tablets are put in and rotated for 2 minutes (rotation speed is 25 rotations / minute). The powder on the surface of each tablet after completion is brushed (for example, a brush used for cleaning a chemical balance) with a brush (wear), and it is calculated by the following formula.
[(Total tablet weight before abrasion (g) -Total weight of tablet after abrasion (g) Total lang = EN-US>) / Total weight of tablet before abrasion (g) Total] × 100 = Tablet abrasion degree (wt%)
style ='color: black; mso-themecolor: text1'> For example, the weight of one tablet is 40g.
In the case of, 1 tablet is put in, and in the case of 60 g, 1 tablet is put in, and if 1 tablet is 16.5 g, 2 tablets are put in. lang = EN-US>

When the degree of abrasion of the tablet is 10.0 wt% or less, the binding force of each component is improved, micro-sized foaming in the tablet is slowly caused, and the dissolution of carbon dioxide gas in the liquid can be efficiently controlled. Therefore, the degree of abrasion is preferably 10.0 wt% or less, more preferably 5.0 wt% or less, and particularly preferably 3.0 wt% or less. Regarding the degree of abrasion in the present invention, carbon dioxide gas is generated more efficiently in the tablet after the tablet starts to dissolve, carbon dioxide gas is efficiently dissolved in water, and the diameter of the foam is fine. As a result, micro-sized bubbles are continuously generated, and the effect of the present invention is satisfactorily achieved.

Due to its ease of handling, the present invention is preferably a tablet bath rather than a powder bath and a granular bath.

The solid bath agent of the present invention is prepared by putting hot water at about 40 ° C. in a boots-shaped soft tank according to the present invention, dissolving it, and then immersing the lower limbs, for example, the legs below the knee, in this solution for at least 15 minutes (preferably 15). ~ 20 minutes, more preferably 30 minutes more.) By soaking in the footbath, the effect of the present invention is satisfactorily achieved.

When citric acid is used as the organic acid, the neutralization reaction with the carbonate occurs more effectively than when other organic acids are used, so that the effect of the present invention can be exhibited more remarkably.

As the water-soluble silicon or the water-soluble silicon compound preferably used in the present invention, for example, silica (SiO ₃ ), orthosilicic acid and other publicly known materials can be used, and the names of UMO micron powder and fine silicon powder are given by Lynx Co., Ltd. You can also get it at. In particular, when UMO micron powder is used, the effect of the present invention can be remarkably exhibited.

The term "surfactant" in the present invention means to include all compounds and substances well known to those skilled in the art.

Hereinafter, the present invention will be described in more detail.
In the present invention, even if the pH immediately after the solid bath is dissolved is a specific value of neutral or weakly alkaline, an environment in which the neutralization reaction occurs efficiently appears in the bath, and the reaction is continued for a certain period of time. The concentration of carbon dioxide gas dissolved in water can be made sufficiently high, and the dissolved carbonate component can be converted into high-concentration bicarbonate ion, and a part of it can be converted into free bicarbonate ion in hot water. ..

The pH immediately after dissolution of the solid bath agent in the present invention is in the range of pH 5.5 to 9.0, particularly pH 6.2 to 8.0, in order to neutralize the dissolved carbon dioxide component and dissolve it as bicarbonate ion at a high concentration. It is important that the pH is in the range of 7.0 to 8.0, which causes carbon dioxide generation and efficient conversion to bicarbonate ions, especially substantially surfactants and bicarbonates. When the composition does not contain an ion blocking substance, it is important in terms of enhancing the effect of the present invention.

The pH immediately after dissolution means that carbon dioxide gas naturally volatilizes and the pH gradually rises immediately after the solid bath is dissolved, even if the bicarbonate ion is near the neutral pH. For example, immediately after the dissolution. Even if the pH of is 7.0, the pH changes to about 7.3 after 24 hours, and the pH is further increased by blowing air with a jet bath or the like. Therefore, it is appropriate to specify the pH after dissolution by the pH immediately after dissolution.

The required amount of the solid bath agent of the present invention is about 20 g to 100 g (0.01% to 5%) per 200 liters of hot water, and in the case of the footbath of the present invention, for example, hot water is about 0.1 to 2 liters per leg. In the case of a close contact type of disposable flexible material, it may be 0.1 liter or less per leg. The pH immediately after the solid bath is dissolved is the pH value required for the presence of bicarbonate ions in a high concentration.

When the pH value of the solid bath agent according to the present invention is adjusted to the pH value of the present invention with an acid or alkaline pH adjuster as necessary, a neutralization reaction occurs efficiently and the rate is appropriate for dissolution in hot water. One of the features of the present invention is that the pH of the hot water or the aqueous solution in which the solid bath agent has been dissolved can be set to a specific value of neutral by generating carbon dioxide gas. In particular, it is a preferred embodiment to adjust the pH with sodium bicarbonate.

Originally, the neutralization reaction is unlikely to occur in neutral, but in powders, granules or tablets, bicarbonate and organic acids come into contact with high concentrations, causing a neutralization reaction and adjusting the pH of a large amount of dissolved hot water. It can be within the scope of the present invention.

In the present invention, the amount of the organic acid added to the bicarbonate (preferably sodium bicarbonate) may be within the range of the present invention even for pH adjustment, but is preferably 1/100 to 2/3, particularly 1/50. ~ 1/3 is preferable.

As a result, the generated carbon dioxide component is neutralized to become bicarbonate ion, but even if bicarbonate is added from the beginning, for example, the footbath effect of warming the legs cannot be obtained at all, so it is similar to natural carbonated spring. In addition, the present inventors have made a surprising discovery that the effect of the present invention cannot be obtained unless a mechanism for generating carbon dioxide gas and converting it into bicarbonate ion via the carbon dioxide gas is passed. I am proud of it.

As described above, when the hot water is in a neutral state, the bicarbonate and the organic acid citric acid and the like react slowly and finely, so that a high footbath effect can be obtained and a product with high added value can be provided.

The above effect of the present invention is that bicarbonate and organic acid (particularly citric acid) are granulated with polyethylene glycol and mixed under conditions within a certain ratio, and the pH of the solid bath immediately after dissolution is within a certain range. By designing as such, when hot water permeates the bath agent, it reacts violently and uniformly and continuously, and the generated carbon dioxide gas bubbles are generated as micro-sized fine carbon dioxide gas, and the bath agent produces small and fine bubbles until the end. A large number of them are generated and dissolve in hot water before the bubbles come out into the air, and the concentration of carbon dioxide gas in the liquid and the bicarbonate ion that dissolves can be increased, and the carbon dioxide gas dissolves and becomes bicarbonate ion. The pH of the resulting water is 5.5 to 9.0, preferably 6.2 to 8.0, and contains the lubricant of the present invention such as n-octane sulfonate, more preferably. The effect of the present invention is maximized by using a bath agent adjusted to have a structure that does not substantially contain a surfactant or a bicarbonate ion blocking substance.

Further, in the present invention, the mixture of bicarbonate is a granulated product prepared by coating with polyethylene glycol (PEG) using a fluidized bed, so that a uniform reaction in tablets can be achieved. The manifestation of the effect is greatly exhibited.

Further, in the present invention, when the solid bath agent of the present invention is used as a tablet, the higher the tablet hardness, the more neutral the solution becomes, but the neutralization reaction efficiency inside the tablet can be maximized.

In the present invention, it is preferable that the bath agent does not contain the above-mentioned slaked carbonate ion blocking substance, and the slaked carbonate ion blocking substance is an organic or inorganic compound containing mineral components such as calcium and magnesium, and specifically. Refers to calcium salts such as calcium sulfate, calcium silicate, calcium carbonate, calcium oxide and calcium hydroxide, and magnesium salts such as magnesium sulfate, magnesium silicate, magnesium carbonate, magnesium oxide, magnesium hydroxide and magnesium stearate.

Specific examples are as described above, but other compounds containing calcium and magnesium have the same action of blocking bicarbonate ions, and the present invention does not contain these bicarbonate ion blocking compounds. It is preferable to exert the effect.

However, the present invention preferably contains water-soluble silicon. As the water-soluble silicon, any known and publicly available silicon may be used. In particular, water-soluble silicon can be obtained from Lynx Co., Ltd. under the names of UMO micron powder and fine silicon powder, and when UMO micron powder is used, the effect of the present invention can be remarkably exhibited. In addition, a plant-derived water-soluble silicon sold by Mediations Co., Ltd. was available, which also showed a remarkable effect similar to that of UMO micron powder.

As the organic acid used in the present invention, citric acid, fumaric acid, succinic acid, malic acid and the like are used, but using an organic acid containing at least citric acid makes the neutralization reaction in the bath agent more effective. It is possible to generate persistent and fine bubbles, and the effect of the present invention can be more remarkably exhibited as a preferable compound.

When producing the solid bath agent according to the present invention, when at least one of bicarbonate and organic acid is granulated in a fluidized bed to obtain a granulated product, a machine that does not substantially use air as a stirring action. When a fluidized bed granulator is used, the reaction in the tablet can be efficiently enhanced. The mechanical stirring type flow layer does not use air for stirring, but uses mechanical blades such as a propeller to flow the powder. Therefore, moisture brought in from moist air during granulation. It is also possible to create a vacuum with a decompression pump during granulation without absorbing moisture, and since granulation can be performed by reducing the amount of PEG, the diameter of foaming bubbles is extremely small while making the neutralization reaction more active. It is preferably used because it can exert the desired effect.

A mechanical fluidized bed granulator that does not substantially use air as a stirring action is a mixer in which a plow-shaped excavator is placed in a horizontal drum to cause centrifugal diffusion and eddy current action, and to make it flow three-dimensionally. For example, it is sold in the market as a product manufactured by Germany's Ladyge or Matsuzaka Giken.

It is more preferable that the granulator is equipped with a vacuum pump for depressurizing. That is, it is preferable in order to improve the effect of the present invention by reducing the pressure at the time of cooling and operating so that the water is removed as much as possible. Further, it is preferable to have a chopper for preventing the granulated granules from becoming coarse particles when cooled. That is, by operating the chopper during cooling and sizing the carbon dioxide bubbles of the present invention, the effect of making the diameter of the carbon dioxide bubbles of the present invention smaller and finer is exhibited, and the micro-sized bubbles are combined with the wear degree regulation according to the present invention. The effect of the present invention, which is continuously generated, can be exhibited, which is a more preferable granulation method.

In the most preferable production method in the present invention, sodium bicarbonate is granulated by a fluidized bed granulator using PEG and a mechanical stirring method, and a certain ratio of organic acid, anhydrous sodium carbonate and PEG are added to the granulated product. Is added, mixed, and then compression-molded at high pressure to obtain a solid bath agent, whereby the effect of the present invention is greatly exhibited.

Of course, a mixture mainly composed of an organic acid can also be granulated using PEG, and the bicarbonate can be simply mixed with PEG without granulation, and mixed with the organic acid granulated product and compression molded to obtain a tablet. , The amount of the compound to be granulated is relatively small, which is a preferable method as a manufacturing method from the aspect of process, but in any case, from the aspect of cost, either bicarbonate or organic acid is produced. It is desirable to granulate and manufacture one by simply mixing. The effect of the present invention can be greatly exerted by using this granulated product as a powder as it is, but carbon dioxide gas that maintains the neutralization reaction of the present invention for a long time and dissolves by compression molding into a single tablet can be obtained. Can be increased. However, it is also a preferable production method to use both a bicarbonate and an organic acid by mixing or coating with PEG.

The PEG used in the present invention preferably has an average molecular weight of 1000 to 8000 in that the effects of the present invention can be obtained. An average molecular weight of 1450 or 6000 in terms of molding stability, punch adhesion resistance, capping, and tablet molding speed improvement by a compression molding tableting machine such as a rotary tableting machine.
A degree of PEG can make the granulation result favorable, and when the powder / granule or tablet is dissolved in hot water, the carbon dioxide component can be dissolved to the bicarbonate ion to the maximum, and the powder / granule can be dissolved. The effect of the present invention can be more remarkable as the hardness, the thickness and the diameter of the solid bath agent of the present invention composed of the agent or the tablet become larger.

The ratio of PEG to 100 parts by mass of granulated product A or mixture A of bicarbonate (sodium hydrogen carbonate or potassium hydrogen carbonate) is 1/100 to 1/5, particularly preferably 1/100 to 1/10, and PEG. If the ratio of carbon dioxide is less than the above amount, the diameter of the carbon dioxide foam becomes large and the foaming time becomes short, and the carbon dioxide component dissolved in hot water may not be large. On the other hand, if the amount of PEG becomes larger than the above, The amount of bubbles generated may be suppressed, and the amount of carbon dioxide gas dissolved in the same manner may be reduced.

Further, in the present invention, anhydrous sodium carbonate or anhydrous potassium carbonate is obtained in the step of obtaining granulated product A or PEG mixture A of bicarbonate and then adding organic acid or organic acid granulated product B or PEG organic acid mixture. By adding an anhydride such as, the effect of the present invention can be exerted more remarkably, and the effect of increasing the amount of foaming and maintaining it for a long time while making the foam diameter of carbon dioxide gas optimally fine. Was found to be obtained.

As for the effect of this anhydride, anhydrous sodium carbonate is a compound that exerts a more preferable effect of the present invention.

Further, in the present invention, when the organic acid is not granulated but the granulated product A and the organic acid are simply mixed with PEG to form a solid powder / granule or compression molded into a tablet, the micro size of the present invention is used. It was found that the carbon dioxide component dissolved in hot water could be increased by foaming the foam for a long time, and a good bathing agent could be obtained. In this case, the process can be largely omitted, and the manufacturing method is desirable in terms of cost effectiveness.

On the other hand, even in the case of compression molding by simply granulating an organic acid with PEG and mixing bicarbonate and PEG at a constant temperature, the micro-sized foam of the present invention is foamed for a long time and dissolved in hot water. It was found that it is a desirable manufacturing method when the carbon dioxide component to be produced is maximized, the process can be largely omitted, and the cost effect is also combined.

The ratio of PEG used to the organic acid in this production method is preferably 5 to 15 parts by mass with respect to 100 parts by mass of the organic acid.

The amount of the organic acid or the organic acid mixture B or the organic acid granulated product B added to the bicarbonate granulated product A or the PEG mixture A is not specified, but is preferably 1/100 to 2/3, particularly preferably 1. It is desirable that the ratio is 1/10 to 1/3 to maximize the effect of the present invention.

The effect of the present invention can be obtained by adding an anhydride without particularly granulating the organic acid, but more preferably, it is added together with PEG or made into PEG granulated product B and mixed with granulated product A. Then, it is possible to formulate a solid bath having a neutralization reactivity, which is preferably tableted by powder or compression molding.

Further, in the present invention, the step of preparing the granulated product A or the mixture A, or the step of mixing the granulated product A with the organic acid or the granulated product B, such as powder / granulation or compression molding. It is preferable to add the above-mentioned anhydride to the step.

In the present invention, sodium lauryl sulfate, sodium lauroyl sarcosinate, sodium myristylmethylalanine, sodium lauryl sulfonate, sodium n- (normal) octane sulfonate, tetradecene as compounds desirable to be used when mixing powders or for tablet molding. Sodium sulfonate, coconut oil fatty acid ethyl ester Sodium sulfonate and sucrose fatty acid ester In particular, sucrose lauric acid ester, sucrose myristic acid ester, sucrose palmitate ester can be mentioned. Among these, sodium n- (normal) octane sulfonate, sodium n-heptane sulfonate and sodium tetradecene sulfonate can remarkably obtain the effect of the object of the present invention. That is, when the bath agent according to the present invention is dissolved in hot water, this compound causes micro-sized foaming to maintain the transparency of the hot water after dissolution, and also has the effect of sustaining leg warming by the bath agent. It also has a favorable effect in terms of getting a good night's sleep.
The amount of the compound used at the time of mixing the powder or for tablet molding may be about 0.0005 to 0.01% by mass of the solid bath agent according to the present invention.

In the present invention, in addition to the main component, other components (additives) can be mixed as needed. Other additives include health ingredients such as hyaluronic acid, fragrances, pigments and the like.

As the organic acid or the mixture B of the organic acid and the granulated product B, an anhydride such as sodium carbonate, a fragrance, a dye, PEG and the like are mentioned as desirable additives.

A known compression molding machine can be used without special restrictions for compression molding in which powders are mixed or tablets are produced. For example, a hydraulic press, a single-shot tableting machine, a rotary tableting machine, a briquetting machine, etc. can be used. Can be used. The size of the pestle used for this tableting machine or the like is preferably 7 mm or more in diameter when the pestle is circular, and 7 mm or more in diameter when converted to a circular pestle when the pestle is triangular or quadrangular. Is preferable. The same applies to the thickness of the pestle. When obtaining a circular tablet product, the diameter of the tablet is preferably 7 mm or more, more preferably 10 mm or more, and the thickness is also 7 mm or more, preferably 10 mm or more. When a tablet such as a triangle or a quadrangle is obtained, a round tablet is used. It is more preferable to convert and make the above.

As described above, in the case of a tablet, it does not necessarily have to be a circular shape having a flat surface, and as long as it is a solid substance of 7 mm or more, the shape is not limited to an ellipse, a tablet, or a sphere.

In the present invention, it is preferable that micro-sized foaming is slowly caused in a hard solid bath having a certain size or more to more efficiently dissolve carbon dioxide gas in the liquid, and therefore the hardness is 15 kg or more, particularly 30 kg or more. The diameter and thickness are preferably 7 mm or more, the hardness is particularly preferably 60 kg or more, and the higher the hardness, the more effectively the generation of carbon dioxide gas in the tablet occurs and the efficiency of dissolution of carbon dioxide gas in hot water is efficient. The diameter of the foam is reduced to produce favorable results.

Hereinafter, hardness, which is a preferable requirement when the solid bath agent of the present invention is made into tablets, will be described.

In order to realize the present invention, the hardness as the tablet breaking strength from the diametrical direction used in the examples of many patent specifications was measured.

In this method, the breaking strength of the tablet is measured, and the hardness [kg] of the tablet was measured four times using the digital tablet hardness tester New Speed Checker TS75NL manufactured by Okada Seiko Co., Ltd. as a method for measuring the hardness in the radial direction. .. In this case, the hardness was reproducible, and no large variation in the values was observed.

When the bubble diameter of carbon dioxide gas generated in hot water, which is a preferable condition of the tablet of the present invention, is visually measured, the tablet diameter is 7 mm or less, the tablet is uniformly generated without foam merging, the neutralization reaction is completed, and the tablet is obtained. Measure the tablet hardness using 12 kinds of 7 lot samples of the test-produced tablets so that the tablets react while submerged in the bottom of the hot water until they are completely dissolved and the carbon dioxide gas can be efficiently dissolved in the hot water. However, if it is the average value of four measurements, the fluctuation width of the measured value can be ignored, and the surface average hardness is 15 kg or more, preferably 18 kg or more (more preferably 25 kg or more, most preferably 30 kg or more, especially 60 kg or more). It was confirmed that it was a tablet.

It is preferable that the present invention has a structure that does not substantially contain a bicarbonate ion blocking substance. In the present invention, the bicarbonate ion blocking substance is an inorganic compound and an organic compound containing mineral components such as calcium and magnesium as described above.

In the present invention, the presence of a bicarbonate ion blocking substance blocks the bicarbonate ions generated in hot water by the present invention, and therefore adheres to mineral stains ionically bonded to leg proteins and keratin. Not only may it not be possible to achieve the effect of dissolving the protein, but also the effect of keeping the footbath warm and the effect of a good sleep time cannot be sufficiently obtained. On the other hand, the effect of the present invention can be expected if the structure is such that the bicarbonate ion blocking substance does not exist.

In the present invention, it is desirable not to add compounds other than the compounds of the present invention as much as possible, but 1 or 2 of acidic components, alkaline components, fragrance components, and if necessary, turbid hot spring components that do not belong to the bicarbonate ion blocking substance are added. The above can also be added.

In the present invention, if the amount of the organic acid component with respect to the amount of bicarbonate is larger than the preferable range of the present invention, the diameter of the foam is large, the reaction is intense, and the reaction may be completed in a short time, and the reaction with respect to the amount of bicarbonate may be completed. If the amount of the organic acid component is too small, the neutralization reaction does not occur efficiently and the amount of carbon dioxide gas generated is small, so that the effect of the present invention may not be exhibited.

If the amount of bicarbonate is too small, the amount of PEG used must be increased, otherwise the neutralization reaction will be too intense and the bubble diameter will be large, impairing the effectiveness of the present invention. It may happen. Further, when the amount of PEG is large or small with respect to the amount of bicarbonate or the amount of organic acid, the neutralization reaction may not occur uniformly and continuously, and the bubble diameter may not be constant. ..

As described above, after adding the necessary components of the present invention in a preferable amount ratio, a pH adjuster that sufficiently exerts the effect of the present invention is added, and the pH of the dissolved hot water is set within the scope of the present invention. It is a desirable embodiment to be inside.

As the pH adjuster used in the present invention, sodium carbonate, sulfuric acid, or an organic acid is preferably used, but any of the publicly known and publicly available ones can be used without particular limitation, and in particular, a pH adjuster as a food additive. Is preferable for safety because the bath preparation may get into the eyes and mouth. For example, trisodium citrate (sodium citrate), disodium citrate, monosodium citrate, potassium gluconate. , Sodium gluconate, disodium succinate, sodium acetate, DL-sodium tartrate, L-sodium tartrate, potassium carbonate, sodium hydrogen carbonate, sodium carbonate, sodium lactate, DL-sodium citrate, and the like.

Hereinafter, the present invention will be described in detail with reference to examples, but the embodiments of the present invention are not limited thereto.

[Example-1]
Hereinafter, the present invention will be described in detail with reference to examples, but the embodiments of the present invention are not limited thereto.

1. 1. Preparation of powder bath for comparison The target powder bath (Comparison 1) was prepared by adding to the modified Ladyge mixer VT1200 manufactured by Matsuzaka Giken Co., Ltd. so that the total weight was 430 kg and mixing for about 10 minutes. ..
Ingredients (% by mass) Comparison 1
Anhydrous sodium carbonate 25
Succinic acid 25
L-Cysteine Hydrochloride 0.4
Titanium oxide powder 0.1
Dextrin 0.1
CMC (* 1) 0.6
PEG6000 6
Lactose 3
Fragrance 0.2
Hydrolyzed keratin 0.01
Carrot powder 0.01
Cha extract 0.01
Licorice flavonoid 0.01
Benzarkoniu Chloride 0.0005
Hydrolyzed collagen 0.015
Natural Vitamin E 0.05
Granular sugar 39.4945
100
(* 1) CMC: Water-soluble carboxymethyl cellulose Granulated saccharides contained sucrose, lactose and dextrin, and Meiji Seika's granulated saccharides filled with high-pressure gas were used.

2. 2. Preparation of powdered bathing agent of the present invention Add the powdered bathing agent VT1200 manufactured by Matsuzaka Giken Co., Ltd. so that the total weight is 430 kg, and mix for about 10 minutes to prepare the desired powdered bathing agent (the present invention 1). did.
Ingredients (% by mass) Invention 1
Anhydrous sodium carbonate 4.0
Sodium bicarbonate 74.9
Citric acid anhydride 15.8
PEG6000 4.8
OSA-Na (* 2) 0.5
100
(* 2) OSA-Na: Sodium n-octane sulfonate The degree of abrasion was set to 10.00 wt%.

3. 3. Preparation of comparative bathing agent and cleaning powder of the present invention 2. In, the amounts of anhydrous sodium carbonate, sodium bicarbonate and citric acid were adjusted so as to have the pH shown in Table 1, and comparisons 2, 3, 4 and 5 and the present inventions 2, 3 and 4 were prepared.

Above 1. ~ 3. Dissolve 1.5 g of the powdered bath agent prepared in step 1 in 4 L of hot water at a temperature of 40 ° C to prepare the footbath shown in Table 1, and conduct an experiment to confirm the effect of the footbath on 5 people, and the result (average of 5 people). The values are shown) are summarized in Table 1.

In the implementation, the above-mentioned boots-shaped soft tank shown in FIGS. 1 and 2 (the amount of hot water in the state of FIG. 2 with the legs inserted is 2 L for one leg) and 2 L of hot water (42 ° C.) per leg. Inject 0.8 g of powdered bath agent per leg to make bath agent-dissolved hot water, put the legs in, and give a footbath for 25 minutes to 5 people, and the result (average value of 5 people) (Shown) is shown in Table 1. The experiment was conducted at an outside air temperature of 28 ° C.

[Evaluation criteria]
(A) Detergency evaluation 1: Sticky dirt on the legs remains (less than 50% when completely removed)
Evaluation 2: There is a slight amount of stickiness on the legs (50% or more and less than 80% when completely removed).
Evaluation 3: The dirt on the legs was removed. The water in the legs is gone and it is dry. (80% or more when completely removed and less than 50% satisfaction with water)
Evaluation 4: The dirt on the legs was removed. The water in the legs is a little low, and it is a little dry. (80% or more when completely removed and 50% or more and less than 90% satisfaction with water)
Evaluation 5: The dirt on the legs is removed, and the legs are moist and smooth. (80% or more when completely removed and 90% or more of moisture satisfaction 100%)

(B) Warmth of toes 30 minutes after footbath Evaluation 1: Less than 10% based on evaluation 5: Thermography of the toes after 30 minutes, the entire finger is blue.
Evaluation 2: Warmth of 10% or more and less than 20% based on evaluation 5.
Evaluation 3: Warmth of 20% or more and less than 50% based on evaluation 5.
Evaluation 4: Warmth of 50% or more and less than 80% based on evaluation 5.
Evaluation 5: Warm as warm as after bathing: Thermography of the toes after 30 minutes, the entire finger is red. (100% by standard).

(C) The ratio of sound sleep time was evaluated using the OMRON sleep meter HSL-101.
Evaluation 1: Sound sleep time less than 10%.
Evaluation 2: Sound sleep time 10% or more and less than 20%.
Evaluation 3: Sound sleep time 20% or more and less than 40%.
Evaluation 4: Sound sleep time 40% or more and less than 50%.
Evaluation 5: Sound sleep time 50% or more.

溶液ｐＨとは、洗浄粉剤０．８ｇを２Ｌの湯水に溶解し、室温で溶解直後に測定した値である。 [Table 1]

The solution pH is a value measured immediately after dissolving 0.8 g of the cleaning powder in 2 L of hot water and dissolving it at room temperature.

As is clear from Table 1, the present invention does not contain a surfactant, has excellent detergency, removes foot mineral stains, and further, bicarbonate ions enter the blood vessels through the percutaneous, and the bicarbonate ion concentration increases. , Blood flow is improved by sending oxygen obtained from breathing to neutralize it, and even just taking a footbath allows sufficient blood flow to the capillaries of the toes at the end, improving the feeling of warmth. However, it can be seen that the proportion of time during which a person was able to sleep soundly increases due to an increase in core body temperature.

[Example 2]
Preparation of powdered bathing agent of the present invention (5 and 6 of the present invention) 2. Isopropylmethylphenol was added in an amount of 0.1% by mass based on the weight ratio of, and the ratio of other components was evenly reduced by the amount of the addition. Created in the same way.
Water-soluble silicon (UMO micron powder purchased from Lynx Co., Ltd.) was added in an amount of 2.0% by mass, and the amount added was lowered evenly according to the ratio of other components to prepare the present invention 6.
The evaluation was performed in the same manner as in Example 1, and the results are summarized in Table 2.

[Table 2]

From the results in Table 2, it can be seen that the effects of the present invention are particularly well exhibited when isopropylmethylphenol and water-soluble silicon are added.
Furthermore, it was found that the bactericidal effect of isopropylmethylphenol itself can be exhibited, the slackening of the skin of the legs, which is the effect of water-soluble silicon, can be eliminated, the skin can be stretched, and the unique effect of the material can be exhibited. In addition, the same effect was observed for the compounds of the present invention other than isopropylmethylphenol.

[Example 3]
Operation-1
Add 390 kg of sodium hydrogen carbonate to the modified model of Ladyge Mixer VT1200 manufactured by Matsuzaka Giken Co., Ltd., circulate hot water at 60 ° C. in the jacket at a rotation speed of 115 rpm, and when the product temperature reaches 55 ° C., add 20 kg of PEG6000 to granulate. When the product temperature reaches 65 ° C., circulate cold water in the jacket, reduce the pressure at 10 tolls, and cool until the product temperature reaches 45 ° C.
The obtained granules are called AA granules.

Operation-2
Mixture A is prepared by adding 333 kg of AA granules, 67 kg of anhydrous citric acid, 17 kg of anhydrous sodium carbonate, 4 kg of PEG6000 and 2 kg of OSA-Na to the modified Ladyge mixer VT1200, and stirring at 115 rpm for 10 minutes.

Operation-3
After adding up to PEG6000 in the same manner as in Operation-2 above, 0.4 kg of isopropylmethylphenol and 2 kg of OSA-Na were added, and the mixture was stirred at 115 rpm for 10 minutes to prepare a mixture B.

Operation-4
After adding up to PEG6000 in the same manner as in Operation-2 above, 8 kg of water-soluble silicon (Lynx UMO Micron Powder Co., Ltd.) and OSA-Na were added and stirred at 115 rpm for 10 minutes to prepare a mixture C.

Operation-5
A weight of 7 tons was added to the mixture prepared by the above operation using a tough press collect 1527HU (tablet making machine) manufactured by Kikusui Seisakusho to prepare tablets having a diameter of 30 mm, a thickness of 15 mm, and a weight of 15 g as shown in Table 3.
The same experiment as in the above example was performed, and the evaluation results are summarized in Table 3.

[Table 3]

From the results in Table 3, if tablets are used, the dissolution time becomes longer, and microcarbon dioxide gas that is finer than the powder is generated, so that the amount of carbon dioxide gas that dissolves in hot water increases, and the carbon dioxide gas becomes bicarbonate ions. It was found that the effect of promoting blood flow is increased, the blood flow to the end is increased, the toes are warmed, and the core body temperature is also raised, so that a deep sleep can be achieved.

Mixtures B and C can increase the tablet hardness by adding them, and thus can exert the effect of improving blood flow to the terminal by further improving blood flow and the effect of the present invention on deep sleep by improving core body temperature. found.

[Example 4]
In place of OSA-Na in Steps-2, 3 and-4 of Example 3, 2 kg of sodium tetradecenesulfonate was added, and other than that, the same procedure as in Example 3 was carried out, and the evaluation thereof is shown in Table 4. The results are summarized.

[Table 4]

From the results in Table 4, it was found that the effect of the present invention can be obtained even if the lubricant is changed from OSA-Na to sodium tetradecenesulfonate.
The same effect of the present invention was obtained even when the mixture was changed to sodium n-heptane sulfonate.

[Example 5]
Instead of OSA-Na in Step-2, Step-3 and Step-4 of Example 3, 2 kg of sodium coconut oil fatty acid ethyl ester sulfonate was added, and other than that, the same procedure as in Example 3 was carried out, and Table 4 The evaluation results are summarized in.

[Table 5]

From the results in Table 5, it was found that the effect of the present invention can be obtained even if the lubricant is changed from OSA-Na to sodium coconut oil fatty acid ethyl ester sulfonate.

[Example 6]
In the mixtures A, B and C of Example 3, the load of operation 5 and the tableting speed are changed at any time, and in particular, the degree of abrasion is changed by changing the loading time of the maximum load of tableting according to the tableting speed. Made different tablets. The dissolved pH was 7.0. The evaluation results are summarized in Table 6.

[Table 6]

From the results in Table 6,
When the degree of abrasion of the tablet is 10.0 wt% or less, micro-sized foaming in the tablet is slowly caused, and the dissolution of carbon dioxide gas in the liquid can be efficiently controlled. Therefore, the degree of abrasion is preferably 10.0 wt% or less, more preferably 5.0 wt% or less, and particularly preferably 3.0 wt% or less. The degree of abrasion in the present invention is such that the generation of carbon dioxide gas in the tablet occurs more efficiently, particularly after the tablet starts to dissolve, the carbon dioxide gas is efficiently dissolved in water, and the diameter of the foam increases. It becomes finer and it can be seen that the effect of the present invention is satisfactorily exhibited. Further, from the mixtures B and C, it can be seen that the addition of the compound of the present invention favorably exerts the effect of the present invention.

In the above embodiment, it was confirmed that the effect of the present invention can be obtained even when the outside air temperature is lowered by enhancing the heat retention effect by using the heat insulating lid shown in FIG. 5 in the boots-shaped soft tank.

In each of the above examples, the dissolved hot water in which the solid bath agent is dissolved is injected into the boots-shaped soft tank 1, but the boots-shaped soft tank 1 is filled with hot water and the solid bath agent is injected into the boots-shaped soft tank 1. The same effect as described above was also obtained in the mode of using dissolved hot water.

Claims (8)

A solvent prepared by dissolving the solid baths in hot water, at boot-shaped soft tank (hot water temperature adjustment heating device and those carried when not in use with the exception of folding bag can.) And combinations are footbath footbath bath set There,
The solid bath contains a carbonate and an organic acid, the carbonate is sodium hydrogen carbonate or potassium hydrogen carbonate, and the organic acid is citric acid, fumaric acid, succinic acid, malic acid, at least 1 It contains at least one selected from the following group A and at least one selected from the following group B, and further contains substantially no bicarbonate ion blocking substance, and has a degree of abrasion of 10. It is 0 wt% or less, and the pH immediately after being dissolved in hot water is 5.5 to 9.0.
The solid bath agent is dissolved in the boots-shaped soft tank, or a solution in which the solid bath agent is dissolved is injected into the boots-shaped soft tank, and the warming effect of the lower limbs inserted into the boots-shaped soft tank by bicarbonate ions. A footbath bathing set characterized by a structure that provides a long-lasting and sound sleep effect.
[Group A]
Sodium n-octane sulfonate, sodium n-heptane sulfonate, sodium tetradecene sulfonate, sodium coconut oil fatty acid ethyl ester sulfonate [Group B]
Isopropylmethylphenol, salicylic acid, tricloic acid, glycyrrhizic acid, β-glycyrrhizic acid, trichlorocarbanilide, benzalkonium chloride

The footbath bathing set according to claim 1 , wherein the hardness of the solid bathing agent is 15 kg or more. The footbath bathing set according to claim 1 or 2 , wherein the solid bathing agent has a diameter and a thickness of 7 mm or more. The boots-shaped soft tank is disposable with a flexible material with a thickness of 1 mm or less, and has a protruding portion on the inner surface of the bottom of the tank that separates the sole of the foot from the bottom of the tank .
The footbath bathing set according to any one of claims 1 to 3 , wherein the inner surface of the tank body has a protruding portion that separates the skin of the lower limbs from the surface of the tank body . The footbath bathing set according to claim 4 , wherein the protruding portion is a protrusion or a piece of tongue. The footbath bathing set according to any one of claims 1 to 5 , wherein the boots-shaped soft tank has a heat insulating member that keeps the hot water in the soft tank warm when the lower limbs are inserted. The footbath bathing set according to claim 6 , wherein the heat insulating member has a heat insulating lid that is crowned on the upper end opening edge of the boots-shaped soft tank. The footbath bathing set according to claim 7 , wherein the heat insulating lid has a lower limb insertion hole in the center thereof and has a cut that separates the lid portion from the lower limb insertion hole.

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