Electrospinning composition for deodorization

Abstract

To provide compositions and methods for forming a film having deodorant ability with good adhesion to the surface of a human body by forming a film containing a deodorant and fibers on the surface of the human body using the electrospinning method.SOLUTION: Provided is a composition X used to produce fiber deposits discharged from an electrospinning apparatus, the composition X containing the following components (a) to (d), and the mass ratio (d) / (b) of component (d) to component (b) being 0.01 or more and 0.9 or less. (a) One or more volatile substances selected from alcohols and ketones; (b) a water-insoluble polymer that is soluble in component (a); (c) water; and (d) one or more water-soluble deodorant components selected from polyhydroxyamines, polyethyleneimines, alkanolamines, basic amino acids or polymers thereof, and alkali metal phosphates.SELECTED DRAWING: Figure 7

Description

[Technical field]

[0001] The present invention relates to a deodorizing technology that utilizes fiber deposits produced by electrospinning. [Background technology]

[0002] Various methods for forming fiber deposits by electrospinning are known, and as a technology utilizing such a method for deodorization, Patent Document 1 discloses an ultrafine fiber laminate in which a deodorant is exposed on the surface of ultrafine fibers or encapsulated within ultrafine fibers, which is produced by dispersing a deodorant in a water-soluble polymer aqueous solution and spraying it by an electrospinning method. Meanwhile, Patent Document 2 discloses a method for forming a coating containing fibers with excellent adhesion on the surface of the skin or nail by dissolving a water-insoluble polymer in a solvent of volatile alcohol or ketone and water, and directly electrospinning the resulting solution onto human skin or nail. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2019-44282 A [Patent Document 2] JP 2018-177803 A Summary of the Invention [Problem to be solved by the invention]

[0004] The technology described in the cited document 1 uses only water as a solvent and a water-soluble polymer, so when a textile laminate is formed on the surface of the human body, such as human skin, it takes a long time to dry and the textile laminate dissolves due to moisture released from the human body through sweating, etc. In addition, the technology described in the cited document 2 does not take into consideration its application to deodorizing technology, and does not suggest any conditions for incorporating a deodorizing agent.

[0005] Accordingly, the present invention relates to a composition and method for forming a fiber deposit using an electrostatic spinning method, which has deodorizing properties and is resistant to dissolution by moisture such as sweating when applied to the surface of the human body. [Means for solving the problem]

[0006] Therefore, as a result of various investigations, the present inventors have found that by using a water-insoluble polymer, using a volatile alcohol or ketone and water as a solvent, containing a water-insoluble deodorant in a certain ratio, and discharging this composition from an electrostatic spinning device onto the surface of the human body to form a coating containing fibers, or by discharging the composition to a location other than the surface of the human body and applying a sheet containing the fibers formed to the surface of the human body, it is possible to obtain a coating or sheet that is not easily dissolved by moisture such as sweat, has good adhesion to the skin, etc., and has deodorizing properties, and have completed the present invention.

[0007] The present invention provides a composition X used for producing a fiber deposit by being discharged from an electrostatic spinning apparatus, the composition X comprising the following components (a) to (d), in which the mass ratio (d) / (b) of component (d) to component (b) is 0.01 or more and 0.9 or less: (a) One or more volatile substances selected from alcohols and ketones (b) a water-insoluble polymer that is soluble in component (a); (c) water (d) one or more water-soluble deodorizing components selected from polyhydroxyamines, polyethyleneimines, alkanolamines, basic amino acids or their polymers, and alkali metal phosphates;

[0008] The present invention also provides a method for forming a fiber-containing coating on the surface of a human body by electrostatically spinning a composition X containing the following components (a) to (d) onto the surface of the human body, wherein the mass ratio (d) / (b) of component (d) to component (b) is 0.01 or more and 0.9 or less: (a) One or more volatile substances selected from alcohols and ketones (b) a water-insoluble polymer that is soluble in component (a); (c) water (d) one or more water-soluble deodorizing components selected from polyhydroxyamines, polyethyleneimines, alkanolamines, basic amino acids or their polymers, and alkali metal phosphates;

[0009] The present invention further provides a method for deodorizing malodor emitted from the human body by electrostatically spinning a composition X containing the following components (a) to (d) onto the surface of the human body to form a coating containing fibers on the surface of the human body, wherein the mass ratio (d) / (b) of component (d) to component (b) is 0.01 or more and 0.9 or less. (a) One or more volatile substances selected from alcohols and ketones (b) a water-insoluble polymer that is soluble in component (a); (c) water (d) one or more water-soluble deodorizing components selected from polyhydroxyamines, polyethyleneimines, alkanolamines, basic amino acids or their polymers, and alkali metal phosphates;

[0010] The present invention further relates to the following components (B) and (d): (B) Water-insoluble polymer (d) one or more water-soluble deodorizing components selected from polyhydroxyamines, polyethyleneimines, alkanolamines, basic amino acids or their polymers, and alkali metal phosphates; A sheet containing fibers containing the above-mentioned compound, wherein the mass ratio (d) / (B) of component (d) to component (B) is 0.01 or more and 0.9 or less, and the basis weight is 0.05 g / m 2 More than 50g / m 2 The present invention provides a sheet for application to the surface of the human body, wherein the fiber has an equivalent circular diameter of 100 nm or more and 15,000 nm or less. Effect of the Invention

[0011] According to the present invention, by forming a coating containing fibers containing a deodorant on the surface of the human body using electrostatic spinning, or by applying a sheet containing fibers formed in a place other than the surface of the human body to the surface of the human body, the coating or sheet has good adhesion to the surface of the human body and deodorizing ability, and can thereby exhibit sustained deodorizing ability. [Brief description of the drawings]

[0012] [Figure 1] FIG. 1 is a schematic diagram showing the configuration of an electrospinning device preferably used in the present invention. [Diagram 2] FIG. 2 is a schematic diagram showing the configuration of another embodiment of an electrospinning apparatus suitably used in the present invention. [Diagram 3] FIG. 3 is a schematic diagram showing the structure of a cartridge unit and a main body unit provided in the electrospinning apparatus shown in FIG. 2. [Figure 4] 3 is a schematic diagram showing another embodiment of the cartridge unit and the main body unit provided in the electrospinning apparatus shown in FIG. 2. [Diagram 5] FIG. 1 is a schematic diagram showing the configuration of yet another embodiment of an electrospinning apparatus used in the present invention. [Figure 6] FIG. 6 is a schematic diagram showing the structure of a cartridge unit provided in the electrospinning apparatus shown in FIG. 5. [Figure 7] FIG. 1 is a schematic diagram showing a state in which an electrostatic spinning method is performed using an electrostatic spinning device. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] [Component (a): Volatile substances] The volatile substance of component (a) used in the composition X for electrostatic spinning of the present invention is one or more selected from alcohols and ketones, and is a substance that has volatility in a liquid state. After the composition X placed in an electric field is sufficiently charged, it is discharged from the tip of a nozzle toward a flat surface, and as the component (a) evaporates, the charge density of the composition X becomes excessive, and the component (a) further evaporates while being further refined by Coulomb repulsion, and finally a dry fiber deposit can be formed. For this purpose, the vapor pressure of the volatile substance at 20°C is preferably 0.01 kPa or more and 106.66 kPa or less, more preferably 0.13 kPa or more and 66.66 kPa or less, even more preferably 0.67 kPa or more and 40.00 kPa or less, and even more preferably 1.33 kPa or more and 40.00 kPa or less.

[0014] Among the volatile substances of component (a), the alcohols preferably include, for example, monohydric chain aliphatic alcohols, monohydric cyclic aliphatic alcohols, and monohydric aromatic alcohols. As the monohydric chain aliphatic alcohols, those having 1 to 6 carbon atoms are preferred, and examples thereof include ethanol, 1-propanol, 2-propanol, butanol, and pentanol. As the monohydric cyclic aliphatic alcohols, those having 4 to 6 carbon atoms are preferred, and examples of the monohydric aromatic alcohols include benzyl alcohol and phenylethyl alcohol.

[0015] Of the volatile substances of component (a), the ketone is preferably a dialkyl ketone in which the alkyl group has 1 to 4 carbon atoms, such as acetone, methyl ethyl ketone, and methyl isobutyl ketone.

[0016] The volatile substance of component (a) may be one or more kinds, more preferably one or more kinds selected from ethanol, isopropyl alcohol, and butyl alcohol, even more preferably one or two kinds selected from ethanol and butyl alcohol, and from the viewpoint of the feel of the formed fiber, it is even more preferable that it contains ethanol.

[0017] The content of component (a) in composition X is preferably 65% ​​by mass or more, more preferably 67% by mass or more, even more preferably 68% by mass or more, and even more preferably 69% by mass or more. It is also preferably 90% by mass or less, more preferably 88% by mass or less, even more preferably 85% by mass or less, and even more preferably 80% by mass or less. The content of component (a) in composition X is preferably 65% ​​by mass or more and 90% by mass or less, more preferably 67% by mass or more and 88% by mass or less, even more preferably 68% by mass or more and 85% by mass or less, and even more preferably 69% by mass or more and 80% by mass or less. By containing component (a) in composition X at this ratio, component (a) can be sufficiently volatilized when performing electrostatic spinning, and a fiber deposit can be formed.

[0018] Furthermore, from the viewpoint of high volatility and the feel of the formed fiber, the amount of ethanol is preferably 50% by mass or more and 100% by mass or less, more preferably 65% ​​by mass or more and 100% by mass or less, and even more preferably 80% by mass or more and 100% by mass or less, based on the total amount of volatile substances of component (a).

[0019] [Component (b): Water-insoluble polymer] The water-insoluble polymer, component (b), is a substance that can be dissolved in the volatile substance, component (a). Here, "dissolved" means that the polymer is in a dispersed state at 20°C, and the dispersed state is visually uniform, preferably visually transparent or translucent.

[0020] As the water-insoluble polymer, an appropriate one is used according to the properties of the volatile substance of component (a). Specifically, it is a polymer that is soluble in component (a) and insoluble in water, and has fiber-forming ability. In this specification, the term "water-soluble polymer" refers to a polymer that has the property that 1 g of the polymer is weighed and then immersed in 10 g of ion-exchanged water under an environment of 1 atmosphere and 23°C, and after 24 hours, 0.5 g or more of the immersed polymer dissolves in water. On the other hand, in this specification, the term "water-insoluble polymer" refers to a polymer that has the property that 1 g of the polymer is weighed and then immersed in 10 g of ion-exchanged water under an environment of 1 atmosphere and 23°C, and after 24 hours, 0.5 g or more of the immersed polymer does not dissolve, in other words, a polymer that has the property of dissolving less than 0.5 g.

[0021] Examples of water-insoluble polymers having fiber-forming ability include fully saponified polyvinyl alcohol that can be insolubilized after the formation of fiber deposits, partially saponified polyvinyl alcohol that can be crosslinked after the formation of fiber deposits by using a crosslinking agent in combination, oxazoline-modified silicones such as poly(N-propanoylethyleneimine) graft-dimethylsiloxane / γ-aminopropylmethylsiloxane copolymers, polyvinyl acetal diethylaminoacetate, zein (the main component of corn protein), polyester, polylactic acid (PLA), acrylic resins such as polyacrylonitrile resins and polymethacrylic acid resins, polystyrene resins, polyvinyl butyral resins, polyethylene terephthalate resins, polybutylene terephthalate resins, polyurethane resins, polyamide resins, polyimide resins, polyamideimide resins, etc. One or more of these water-insoluble polymers can be used in combination. Of these water-insoluble polymers, it is preferable to use one or more selected from fully saponified polyvinyl alcohol, which can be insolubilized after the formation of a fiber deposit; partially saponified polyvinyl alcohol, which can be crosslinked after the formation of a fiber deposit by using a crosslinking agent in combination; acrylic resins such as polyvinyl butyral resin, polyurethane resin, and polymethacrylic acid resin; oxazoline-modified silicones such as poly(N-propanoylethyleneimine) graft-dimethylsiloxane / γ-aminopropylmethylsiloxane copolymer; polylactic acid (PLA); and zein.

[0022] Of these water-insoluble polymers, from the viewpoints of dispersibility in alcohol solvents and the feel of the fibers, one or more selected from partially saponified polyvinyl alcohol, fully saponified polyvinyl alcohol, polyvinyl butyral resin, polymethacrylic resin, and polyurethane resin are more preferable, and one or more selected from partially saponified polyvinyl alcohol, fully saponified polyvinyl alcohol, and polyvinyl butyral resin are even more preferable. Polyvinyl butyral resin is even more preferable from the viewpoints of the ability to stably and efficiently form fiber deposits and the compatibility between the durability, formability, and followability to the human body surface and the like of the fiber deposits.

[0023] The content of component (b) in composition X is preferably 3% by mass or more, more preferably 4% by mass or more, even more preferably 5% by mass or more, and even more preferably 8% by mass or more. It is also preferably 25% by mass or less, more preferably 20% by mass or less, even more preferably 15% by mass or less, and even more preferably 12% by mass or less. The content of component (b) in composition X is preferably 3% by mass or more and 25% by mass or less, more preferably 4% by mass or more and 20% by mass or less, even more preferably 5% by mass or more and 15% by mass or less, and even more preferably 8% by mass or more and 12% by mass or less. By containing component (b) in composition X at this ratio, a fiber deposit can be formed stably and efficiently.

[0024] The content ratio (b) / (a) of the component (b) to the component (a) in the composition X is preferably 0.02 to 0.20, more preferably 0.03 to 0.18, even more preferably 0.04 to 0.16, and even more preferably 0.06 to 0.14, from the viewpoint of sufficiently volatilizing the component (a) such as ethanol and stably forming a fiber deposit when performing electrostatic spinning. Note that, even when the component (a) is only ethanol, the mass ratio (b) / (a) is similarly preferably 0.02 to 0.20, more preferably 0.03 to 0.18, even more preferably 0.04 to 0.16, and even more preferably 0.05 to 0.14.

[0025] [Component (c): Water] Component (c) is water. Compared with non-ionizing solvents such as ethanol, water is ionized and charged, and therefore can impart electrical conductivity to composition X. Therefore, a fiber deposit is stably formed by electrostatic spinning. In addition, water contributes to improving the adhesion of the fiber deposit formed by electrostatic spinning to the surface of the human body, improving durability, and improving the appearance. From the viewpoint of obtaining these effects, the content of component (c) in composition X is preferably 6% by mass or more, more preferably 8% by mass or more, and even more preferably 10% by mass or more. In addition, the content of component (c) in composition X is preferably 24% by mass or less, more preferably 22% by mass or less, and from the viewpoint of ensuring the formability of the fiber deposit even in summer or in a humid environment, it is preferably 20% by mass or less. The content of water in composition X is preferably 6% by mass or more and 24% by mass or less, more preferably 8% by mass or more and 22% by mass or less, and even more preferably 10% by mass or more and 20% by mass or less, from the viewpoint of forming a fiber deposit even in a humid environment.

[0026] From the viewpoint of stably dissolving sufficient amounts of both the water-soluble deodorant component and the water-insoluble polymer in the composition X, the mass ratio (b) / (c) of the components (b) and (c) is preferably 0.22 or more, more preferably 0.23 or more, and even more preferably 0.25 or more. The mass ratio (b) / (c) is preferably 3 or less, more preferably 2 or less, and even more preferably 1 or less. The range of the mass ratio (b) / (c) is preferably 0.22 or more and 3 or less, more preferably 0.23 or more and 2 or less, and even more preferably 0.25 or more and 1 or less.

[0027] In addition, from the viewpoint of obtaining a fiber deposit stably by electrostatic spinning of the composition X, and improving the adhesion and durability of the obtained fiber deposit, the mass ratio (a) / (c) of the component (a) to the component (c) is preferably 3 or more, and more preferably 3.5 or more. The mass ratio (a) / (c) is preferably 10 or less, more preferably 9.0 or less, and even more preferably 8.0 or less. The range of the mass ratio (a) / (c) is preferably 3 or more and 10 or less, more preferably 3 or more and 9.0 or less, and even more preferably 3.5 or more and 8.0 or less. In addition, when the component (a) is ethanol, the mass ratio (a) / (c) of the component (a) to the component (c) is also preferably 3 or more and 10 or less, more preferably 3 or more and 9.0 or less, and even more preferably 3.5 or more and 8.0 or less.

[0028] [Component (d): Water-soluble deodorizing component] Component (d) is a water-soluble deodorant component, and has a fiber-forming ability in combination with component (b). In this specification, "water-soluble" refers to the property that, in an environment of 1 atmosphere and 23°C, 1 g of the component is weighed out and then immersed in 10 g of ion-exchanged water, and after 24 hours, 0.5 g or more of the immersed component dissolves in water.

[0029] The water-soluble deodorant component of component (d) is selected from polyhydroxyamines, polyethyleneimines, alkanolamines, basic amino acids or polymers thereof, and alkali metal phosphates. Examples of polyhydroxyamines include tris(hydroxymethyl)aminomethane (also known as 2-amino-2-hydroxymethyl-1,3-propanediol), 2-amino-1,3-propanediol, 2-amino-2-methyl-1,3-propanediol, 2-amino-2-ethyl-1,3-propanediol, 2-amino-2-hydroxyethyl-1,3-propanediol, 4-amino-4-hydroxypropyl-1,7-heptanediol, 2-(N-ethyl)amino-1,3-propanediol, 2-(N-ethyl)amino-2-hydroxymethyl-1,3-propanediol, 2-(N-decyl)amino-1,3-propanediol, and 2-(N-decyl)amino-2-hydroxymethyl-1,3-propanediol. Examples of polyethyleneimines include those having a molecular weight of 300 to 100,000, preferably those having a molecular weight of 1,000 to 35,000, more preferably those having a molecular weight of 1,500 to 20,000, and even more preferably those having a molecular weight of 5,000 to 15,000. Examples of alkanolamines include monoethanolamine, isopropanolamine, 2-amino-2-methylpropanol, 2-aminobutanol, and trishydroxymethylaminomethane. Examples of basic amino acids or polymers thereof include arginine, histidine, lysine, ornithine, and polylysine. Examples of alkali metal phosphates include disodium hydrogen phosphate, dipotassium hydrogen phosphate, sodium dihydrogen phosphate, and potassium dihydrogen phosphate.

[0030] From the viewpoint of improving the deodorizing effect, the content of component (d) in composition X is preferably 0.1% by mass or more, more preferably 0.2% by mass or more, even more preferably 0.5% by mass or more, and even more preferably 1.0% by mass or more. From the viewpoint of the stability of the formed coating, it is preferably 10% by mass or less, more preferably 5% by mass or less, even more preferably 4% by mass or less, and even more preferably 3% by mass or less. The content of component (d) in composition X is preferably 0.1% by mass or more and 10% by mass or less, more preferably 0.2% by mass or more and 5% by mass or less, even more preferably 0.3% by mass or more and 4% by mass or less, and even more preferably 0.5% by mass or more and 3% by mass or less.

[0031] The mass ratio (d) / (b) of component (d) to component (b) is 0.01 or more, preferably 0.02 or more, more preferably 0.04 or more, and even more preferably 0.1 or more, from the viewpoint of improving the deodorizing effect, and from the viewpoint of ease of discharge from the electrostatic spinning apparatus and suppressing adhesion between the formed fibers to form a laminated state with a high surface area, it is 0.9 or less, preferably 0.8 or less, more preferably 0.7 or less, and even more preferably 0.6 or less. Note that, the lower this ratio, the easier it is to discharge from the electrostatic spinning apparatus, the better the quality of the formed fibers, and the easier it is to laminate, but the deodorizing effect per discharge amount is reduced. For this reason, when the mass ratio (d) / (b) is low, the amount of discharge onto the human body surface or the like is increased, and the basis weight of the formed coating is increased, thereby achieving both ease of discharge and deodorizing effect.

[0032] The mass ratio (d) / (c) of component (d) to component (c) is preferably 0.02 or more, more preferably 0.05 or more, and even more preferably 0.1 or more, from the viewpoint of improving the deodorizing effect, and is preferably 1.0 or less, more preferably 0.3 or less, even more preferably 0.2 or less, and even more preferably 0.15 or less, from the viewpoint of the blend stability of composition X.

[0033] [Optional ingredients] Composition X may contain only the above-mentioned components (a) to (d), or may contain other components in addition to components (a) to (d). Examples of other components include polyols, pH adjusters, surfactants, liquid oils, plasticizers for the polymer of component (b), conductivity control agents for composition X, water-soluble polymers, powders such as coloring pigments and extender pigments, dyes, water-insoluble deodorants such as porous powders, fragrances, repellents, antioxidants, stabilizers, antibacterial agents, preservatives, various vitamins, etc. When composition X contains other components, the content of the other components is preferably 0.1% by mass or more and 30% by mass or less, more preferably 0.5% by mass or more and 20% by mass or less.

[0034] Polyol From the viewpoint of improving the deodorizing effect and dissolving the component (d), it is preferable that the composition X contains a polyol. Examples of the polyol include dihydric alcohols such as dipropylene glycol, 1,3-butylene glycol, 3-methyl-1,3-butanediol, isoprene glycol, polyethylene glycol, 1,2-pentanediol, 1,2-hexanediol, propylene glycol, polypropylene glycol, ethylene glycol, diethylene glycol, and neopentyl glycol; glycerols such as glycerin, diglycerin, triglycerin, and tetraglycerin; and sugar alcohols such as sorbitol, xylitol, maltitol, and erythritol. Among them, one or more selected from polyethylene glycols and polypropylene glycols having a molecular weight of 3000 or less are preferable.

[0035] The content of polyol in composition X is preferably 0.5% by mass or more, and more preferably 1% by mass or more, from the viewpoint of improving the deodorizing effect and dissolving component (d), and is preferably 10% by mass or less, and more preferably 5% by mass or less, from the viewpoint of stably forming a coating on the fiber.

[0036] pH adjuster Composition X may contain a pH adjuster for pH adjustment. As the pH adjuster, organic acids, inorganic acids and their salts may be used, and organic acids and their salts are particularly preferred. Organic acids include citric acid, glycolic acid, succinic acid, tartaric acid, lactic acid, fumaric acid, malic acid, levulinic acid, butyric acid, oxalic acid, etc., and inorganic acids include hydrochloric acid, phosphoric acid, sulfuric acid, nitric acid, etc.

[0037] Composition X may contain powders such as color pigments and extender pigments. From the viewpoints of the formability of a uniform coating and the durability and adhesion of the coating, the content of powders having a particle size of 0.1 μm or more at 20° C. is preferably 1% by mass or less, more preferably 0.1% by mass or less, and even more preferably 0.01% by mass or less. It is preferable that no powders are contained except in the case of unavoidable contamination.

[0038] 〔viscosity〕 The viscosity of composition X is preferably 2 to 3000 mPa·s at 25°C from the viewpoints of stably forming a fiber deposit, spinnability during electrostatic spinning, improving durability of the fiber deposit, and improving the feel of the fiber deposit. The viscosity is preferably 10 mPa·s or more, more preferably 15 mPa·s or more, even more preferably 20 mPa·s or more, and even more preferably 30 mPa·s or more. The viscosity is preferably 1500 mPa·s or less, more preferably 1000 mPa·s or less, and even more preferably 800 mPa·s or less. The viscosity range is preferably 2 mPa·s or more and 3000 mPa·s or less, more preferably 10 mPa·s or more and 1500 mPa·s or less, even more preferably 15 mPa·s or more and 1000 mPa·s or less, and even more preferably 15 mPa·s or more and 800 mPa·s or less. The viscosity of composition X is measured at 25°C using an E-type viscometer. For example, an E-type viscometer (VISCONIC EMD) manufactured by Tokyo Keiki Co., Ltd. can be used as the E-type viscometer. In this case, the measurement conditions are 25°C, a cone plate rotor No. 43, and a rotation speed appropriate for the viscosity, with 5 rpm for a viscosity of 500 mPa·s or more, 10 rpm for a viscosity of 150 mPa·s or more but less than 500 mPa·s, and 20 rpm for a viscosity less than 150 mPa·s.

[0039] [Formation of fiber deposits, target of deodorization] In the present invention, the fiber deposit may be formed on the surface of the human body (in this case, it becomes a coating containing fibers that covers the surface of the human body), or it may be formed at a location other than the surface of the human body. As for a location other than the surface of the human body, it may be formed on a base layer having a flat surface as described below so that it can be peeled off after formation and used as a sheet to be applied to the surface of the human body, or it may be formed on the following objects so that it can be used without peeling off after formation. Hereinafter, these may be collectively referred to as the "surface to be formed on". Underwear, underwear, socks, stockings, and other clothing Absorbent items such as sweat pads, sanitary products, and urine pads Shoe insoles (midsole), inner soles ·mask

[0040] When the surface to be formed is the surface of the human body, the composition X is directly electrostatically spun onto the surface of the human body to form a coating containing fibers on the surface of the human body. More specifically, the composition X is applied to an electrostatic spinning device, preferably an electrostatic spinning device that can be held by hand, or an electrostatic spinning device having an operating unit equipped with a spray nozzle that can be held by hand, to form a coating made of fibers on the surface of the human body. In the present invention, the water-soluble deodorizing component of component (d) is contained in the formed coating, so that the bad odor released from the surface of the human body can be deodorized. Component (d) exerts a deodorizing effect by being gradually released from the coating into moisture such as sweat from the surface of the human body, and this deodorizing effect can be maintained.

[0041] The present invention deodorizes malodor-causing substances released from the surface of the human body by chemically bonding with the water-soluble deodorizing component of component (d) contained in the coating, or by neutralizing with the water-soluble deodorizing component of component (d), thereby converting the malodor-causing substances into substances different from the original compounds. Thus, the present invention deodorizes solely by acting on the malodor-causing substances released from the surface of the human body, and does not have any effect on the human body. Here, examples of the surface of the human body include skin, mucous membranes, wounds, etc., and among these, skin is preferred, and armpits, lower legs, and buttocks are more preferred.

[0042] The malodors to be deodorized in the present invention include sweat odor, armpit odor, aging odor, and odors caused by tumors and bedsores. Among the malodor-causing substances, examples of compounds that can be deodorized by neutralizing with component (d) include acidic malodor substances such as acetic acid, butyric acid, isovaleric acid, 3-hydroxy-3-methylhexanoic acid, 3-methyl-2-hexenoic acid, 4-methyl-3-hexenoic acid, and nonanoic acid, and basic malodor substances such as ammonia and trimethylamine. Among the malodor-causing substances, examples of compounds that can be deodorized by chemically bonding with component (d) include aldehyde-based malodor substances such as nonanal and nonenal, and ketone-based malodor substances such as acetoin and diacetyl.

[0043] [Electrostatic spinning device] Composition X is discharged by electrostatic spinning directly onto the part of the human body surface on which a fiber deposit (coating) is to be formed, or onto other target surfaces. The electrostatic spinning method includes a step of electrostatically spinning composition X onto a target surface using an electrostatic spinning device. The electrostatic spinning device basically includes a container for containing the composition, a nozzle for discharging the composition, a supply device for supplying the composition contained in the container to the nozzle, and a power source for applying a voltage to the nozzle.

[0044] FIG. 1 shows a schematic diagram of an electrospinning apparatus suitable for use in the present invention. The electrospinning apparatus 10 shown in the figure is equipped with a low-voltage power supply 11. The low-voltage power supply 11 can generate a voltage of several volts to several tens of volts. In order to increase the portability of the electrospinning apparatus 10, the low-voltage power supply 11 is preferably composed of one or more batteries. In addition, using a battery as the low-voltage power supply 11 has the advantage that it can be easily replaced as necessary. Instead of a battery, an AC adapter or the like can also be used as the low-voltage power supply 11.

[0045] The electrospinning apparatus 10 also includes a high-voltage power supply 12. The high-voltage power supply 12 is connected to the low-voltage power supply 11, and includes an electric circuit (not shown) that boosts the voltage generated by the low-voltage power supply 11 to a high voltage. The boost electric circuit is generally composed of a transformer, a capacitor, a semiconductor element, and the like.

[0046] The electrospinning apparatus 10 further includes an auxiliary electric circuit 13. The auxiliary electric circuit 13 is interposed between the low-voltage power supply 11 and the high-voltage power supply 12 described above, and has a function of adjusting the voltage of the low-voltage power supply 11 to stably operate the high-voltage power supply 12. Furthermore, the auxiliary electric circuit 13 has a function of controlling the rotation speed of a motor included in a micro gear pump 15A described later. By controlling the rotation speed of the motor, the amount of composition X supplied from a container 15 for composition X described later to the micro gear pump 15A is controlled. A switch SW is attached between the auxiliary electric circuit 13 and the low-voltage power supply 11, and the electrospinning apparatus 10 can be operated / stopped by turning the switch SW on and off.

[0047] The electrospinning apparatus 10 further includes a nozzle 15. The nozzle 15 is made of various conductive materials such as metals, or non-conductive materials such as plastics, rubber, and ceramics that are provided around the conductive materials, and has a shape that allows the composition X to be discharged from its tip. A minute space through which the composition X flows is formed in the nozzle 15 along the longitudinal direction of the nozzle 15. The size of the cross section of this minute space is preferably 100 μm or more and 2000 μm or less, and more preferably 300 μm or more and 1400 μm or less, in terms of diameter. From the same viewpoint, the flow path length of the nozzle 15 is preferably 2 mm or more and 25 mm or less, and more preferably 4 mm or more and 15 mm or less.

[0048] Nozzle 15 communicates with micro gear pump 15A via conduit 15B. Conduit 15B may be conductive or non-conductive. Nozzle 15 is also electrically connected to high voltage power supply 12. This allows a high voltage to be applied to nozzle 15. In this case, in order to prevent an excessive current from flowing when a human body directly touches nozzle 15, nozzle 15 and high voltage power supply 12 are electrically connected via a current limiting resistor 19. Nozzle 15 and high voltage power supply 12 may be electrically connected via a conductor (not shown) such as an electrode.

[0049] The micro gear pump 15A, which is in communication with the nozzle 15 via a pipe 15B, functions as a supply device that supplies the composition X contained in the container 14 to the nozzle 15. The micro gear pump 15A operates by receiving power from the low-voltage power supply 11. The micro gear pump 15A is also configured to supply a predetermined amount of the composition X to the nozzle 15 under the control of the auxiliary electric circuit 13.

[0050] The micro gear pump 15A is connected to a container 14 via a flexible pipe 15C. The container 14 contains a composition X. The container 14 is preferably in the form of a replaceable cartridge. This cartridge is more preferably a refill cartridge. This cartridge is preferably a refill cartridge, and the composition X is filled in the cartridge.

[0051] From the viewpoint of achieving both the ease of handling of the electrospinning apparatus 10 and good discharge of the composition X, the volume of the storage section 15 is preferably 1 mL or more, more preferably 1.5 mL or more, even more preferably 3 mL or more, and preferably 25 mL or less, more preferably 20 mL or less, and even more preferably 15 mL or less. Specifically, the volume of the storage section 15 is preferably 1 mL or more and 25 mL or less, more preferably 1.5 mL or more and 20 mL or less, and even more preferably 3 mL or more and 15 mL or less. By setting the volume of the container 15 (also referred to as the storage section 15) in such a range, when the container 15 is in a replaceable cartridge form, there is also the advantage that it is small and can be replaced more easily.

[0052] Next, another embodiment of the electrospinning apparatus used in the present invention will be described with reference to Figures 2 to 6. The electrospinning apparatus 10 shown in Figures 2 to 6 differs from the electrospinning apparatus shown in Figure 1 in that it includes a cartridge unit and a main body unit. For the embodiment shown in Figures 2 to 6, the description of the embodiment shown in Figure 1 applies as appropriate to the points that are not particularly described. In Figures 2 to 6, the same members as those in Figure 1 are denoted by the same reference numerals.

[0053] An electrospinning apparatus 10 according to an embodiment shown in Figs. 2 and 3 will be described. 2 and 3, the electrospinning apparatus 10 is roughly divided into a cartridge part 10A and a main body part 10B. The cartridge part 10A is provided with a storage part 14, a gasket 141, a plunger 142, and a nozzle 15. The main body part 10B is provided with a low-voltage power supply 11, a high-voltage power supply 12, an auxiliary electric circuit 13, a power source 16 including a DC motor 160 and a motor reducer 161, and a power transmission part 17 including a screw shaft 171 and a feed screw 172.

[0054] The cartridge part 10A is detachable from the main body part 10B. Due to this, according to the electrospinning apparatus 10 of this embodiment, the composition X can be easily refilled, and the nozzle 15 can be kept clean. Examples of the form in which the cartridge part 10A can be detachable from the main body part 10B include, for example, a method in which a fitting part is formed in the plunger 142 and the feed screw 172 and the fitting is performed, and a method in which a thread is formed in the plunger 142 and the feed screw 172 and the thread is screwed together, but the present invention is not limited to these methods.

[0055] As shown in FIG. 3, the cartridge portion 10A has a cylindrical storage portion 14 capable of storing the composition X. One end of the storage portion 14 forms an opening. The other end of the storage portion 14 is provided with a nozzle 15. A gasket 141 is disposed inside the storage portion 14. The gasket 141 has a shape having the same contour as the cross-sectional shape of the storage portion 14. This allows the gasket 141 to slide inside the storage portion 14 while being in liquid-tight contact with the inner surface of the storage portion 14. The gasket 141 is connected to the front end of a plunger 142. The plunger 142 extends beyond the opening of the storage portion 14 to the outside of the storage portion 14. The rear end of the plunger 142 engages with a feed screw 172. The storage portion 14 may be conductive or non-conductive.

[0056] In this embodiment, the nozzle 15 communicates with the storage section 14. The nozzle 15 is electrically connected to the high-voltage power supply 12. This makes it possible to apply a high voltage to the nozzle 15. In this case, in order to prevent an excessive current from flowing when the nozzle 15 is directly touched by a human body, the nozzle 15 and the high-voltage power supply 12 are electrically connected via a current-limiting resistor 19. The nozzle 15 and the high-voltage power supply 12 may be electrically connected via a conductor (not shown) such as an electrode.

[0057] The main body 10B includes a low-voltage power supply 11. The low-voltage power supply 11 is capable of generating a voltage of several volts to several tens of volts. In order to increase the portability of the electrospinning apparatus 10, it is preferable that the low-voltage power supply 11 is made of one or more batteries. In addition, by using a battery as the low-voltage power supply 11, there is also an advantage that it can be easily replaced as necessary. Instead of a battery, an AC adapter or the like can also be used as the low-voltage power supply 11.

[0058] The main body 10B further includes a high-voltage power supply 12. The high-voltage power supply 12 is connected to the low-voltage power supply 11, and includes an electric circuit (not shown) that boosts the voltage generated by the low-voltage power supply 11 to a high voltage. The boost electric circuit is generally composed of a transformer, a capacitor, a semiconductor element, etc.

[0059] The main body 10B further includes an auxiliary electric circuit 13. The auxiliary electric circuit 13 is interposed between the low-voltage power supply 11 and the high-voltage power supply 12 described above, and has a function of adjusting the voltage of the low-voltage power supply 11 to stably operate the high-voltage power supply 12. Furthermore, the auxiliary electric circuit 13 has a function of controlling the rotation speed of a motor included in a power source 16 described later. By controlling the rotation speed of the motor, the amount of composition X supplied from a storage section 14 in which the composition X is stored to a nozzle 15 that discharges the composition X is controlled. A switch SW is attached between the auxiliary electric circuit 13 and the low-voltage power supply 11, and the electrostatic spinning apparatus 10 can be operated / stopped by turning the switch SW on and off.

[0060] The main body 10B further includes a power source 16 and a power transmission unit 17. The power source 16 generates power for discharging the composition X contained in the storage unit 14 from the nozzle 15. The power source 16 receives power from a low-voltage power source 11 and operates under the control of an auxiliary electric circuit 13. The power generated from the power source 16 is transmitted to the cartridge unit 10A by the power transmission unit 17, so that a predetermined amount of the composition X can be supplied from the storage unit 14 to the nozzle 15.

[0061] The main body 10B includes a power source 16 having a DC motor 160 and a motor reducer 161, and a power transmission unit 17 having a screw shaft 171 and a feed screw 172.

[0062] The DC motor 160 is connected to a motor reducer 161 that reduces and outputs the rotational power of the DC motor 160. The motor reducer 161 is connected to a rotatable screw shaft 171, and the rotational power generated by the DC motor 160 is transmitted to the screw shaft 171 via the motor reducer 161, causing the screw shaft 171 to rotate. The rotational power transmitted to the screw shaft 171 is converted by a feed screw 172 connected to the screw shaft 171 into linear power that moves the position of the feed screw 172 along the longitudinal direction X. The linearly moving feed screw 172 pushes the plunger 142 and the gasket 141 into the storage section 14, thereby enabling the composition X contained in the storage section 14 to be sprayed to the outside through the nozzle 15.

[0063] In FIG. 3, the lead screw 172 and the plunger 142 are separate, and the plunger 142 and the gasket 141 are integrated. However, the lead screw 172 and the plunger 142 may be integrated, and the plunger 142 and the gasket 141 may be separate, or the lead screw 172 and the gasket 141 may be in direct contact with each other to transmit linear power to the gasket 141.

[0064] Due to the conductive nature of the composition X used in the present invention, the high voltage applied to the nozzle 15 may be applied to the power source 16 via the composition X contained in the container 14 or the power transmission unit 17, which may damage the electrostatic spinning apparatus 10 or cause leakage of electric charge, resulting in failure to spray. Therefore, in order to ensure insulation during use of the electrostatic spinning apparatus 10 and to prevent damage to the electrostatic spinning apparatus 10, and in order to prevent leakage of current via the composition X and ensure stability of spinning, it is preferable that the power transmission unit 17 electrically insulates the power source 16 from the cartridge unit 10A. This effectively prevents the high voltage applied to the nozzle 15 from being unintentionally applied to the power source 16. As a method for electrically insulating the power source 16 from the cartridge unit 10A, for example, a screw shaft 171 or a feed screw 172 made of a non-conductive material such as plastic or ceramic is used as the power transmission unit 17. As long as the power transmission section 17 electrically insulates the power source 16 from the cartridge section 10A, the gasket 141 and the plunger 142 may be either conductive or non-conductive.

[0065] An electrospinning apparatus 10 according to an embodiment shown in FIG. 4 will be described. Figure 4 shows another embodiment of the electrospinning apparatus 10 suitable for use in the present invention. For the embodiment shown in Figure 4, the explanation of the embodiment shown in Figures 2 and 3 applies as appropriate unless otherwise specified. In Figure 4, the same members as those in Figures 2 and 3 are denoted by the same reference numerals.

[0066] 4, the cartridge unit 10A includes a storage unit 14, a gasket 141, and a nozzle 15. On the other hand, the main body unit 10B includes a power source 16 including a linear step motor 162, and a power transmission unit 17 including a screw shaft 171. With these configurations, the amount of composition X supplied from the storage unit 14 to the nozzle 15 can be precisely controlled, and the portability of the electrospinning apparatus 10 can be further improved due to the miniaturization of the main body unit 10B.

[0067] The linear step motor 162 has a rotor (not shown) with an internal thread. A male-threaded screw shaft 171 is screwed into the female thread of the rotor. The linear step motor 162 is fixed to a frame (not shown) of the main body 10B. When the rotor in the linear step motor 162 rotates, the screw shaft 171 screwed into the female thread of the rotor moves linearly along the longitudinal direction X. The linearly moving screw shaft 171 pushes the gasket 141 in contact with one end of the screw shaft 171 into the storage section 14, thereby enabling the composition X contained in the storage section 14 to be sprayed to the outside through the nozzle 15.

[0068] An electrospinning apparatus 10 according to an embodiment shown in FIG. 5 will be described. Another embodiment of the electrospinning apparatus is shown in Fig. 5. The electrospinning apparatus 10 shown in the figure is roughly divided into a cartridge section 10A and a main body section 10B. The cartridge section 10A is provided with a storage section 14, a nozzle 15, and a pump section 15P. The main body section 10B is provided with a low-voltage power supply 11, a high-voltage power supply 12, an auxiliary electric circuit 13, a power source 16, and a power transmission section 17.

[0069] The cartridge part 10A is detachable from the main body part 10B. Due to this, according to the electrospinning apparatus 10 of the present embodiment, the composition X can be easily refilled, and the nozzle 15 can be kept clean. Examples of a form in which the cartridge part 10A can be detachable from the main body part 10B include, but are not limited to, a method in which a fitting part is formed in the power transmission part 17 described later, and the pump part 15P and the power source 16 are fitted together via the power transmission part 17.

[0070] The storage unit 14 is capable of storing the composition X and is detachable from the cartridge unit 10A. Due to this, the electrostatic spinning apparatus 10 of this embodiment allows the composition X to be refilled more easily. Examples of a form in which the storage unit 14 is detachable from the cartridge unit 10A include, but are not limited to, a method in which a fitting portion is formed in the storage unit 14 and the pump unit 15P and the fitting portion is fitted to the storage unit 14 and the pump unit 15P.

[0071] A cartridge portion 10A according to an embodiment shown in FIG. 6 will be described. FIG. 6 shows the cartridge part 10A in this embodiment. The cartridge part 10A has a bag-shaped storage part 14. The storage part 14 is formed into a flat bag shape by overlapping two sheets made of a liquid-impermeable and flexible material such as polyethylene and joining the outer edges of the sheets liquid-tightly. This gives the storage part 14 a deformable structure and allows the composition X to be stored inside the storage part 14. The storage part 14 has an opening 14a at a part of its outer edge that can communicate with the pump part 15P in order to supply the composition X to the pump part 15P. The storage part 14 may be a conductive material or a non-conductive material.

[0072] In this embodiment, the nozzle 15 communicates with the pump section 15P. The nozzle 15 is also electrically connected to the high voltage power supply 12. This allows a high voltage to be applied to the nozzle 15. In this case, in order to prevent an excessive current from flowing when the human body directly touches the nozzle 15, the nozzle 15 and the high voltage power supply 12 are electrically connected via a current limiting resistor 19. The nozzle 15 and the high voltage power supply 12 may be electrically connected via a conductor (not shown) such as an electrode. The nozzle 15 may further have a conduit that communicates with the pump section 15P. The conduit may be a conductor or a non-conductor.

[0073] The cartridge part 10A includes a pump part 15P. The pump part 15P is interposed between the storage part 14 and the nozzle 15 and communicates with each of them. The pump part 15P has a connection part 15a with the opening part 14a of the storage part 14. This allows the composition X stored in the storage part 14 to be supplied to the nozzle 15 while maintaining the liquid-tightness of the flow path between the storage part 14 and the pump part 15P. The pump part 15P is driven by the power of a power source 16, which will be described later, transmitted through a power transmission part 17. The pump part 15P shown in FIG. 6 is further provided with a rotatable power transmission recess 15b for transmitting the power of the power source 16 to an internal mechanism (not shown), such as a gear, in the pump part 15P through the power transmission part 17. As the pump part 15P, a gear pump or the like is used from the viewpoint of improving the discharge quantitation of the composition X and from the viewpoint of improving the portability of the electrospinning apparatus 10. As the gear pump, for example, the micro gear pump described in the embodiment shown in FIG. 1 can be used.

[0074] Due to the liquid-tightness of the flow path between the storage portion 14 and the pump portion 15P being maintained, when the composition X is discharged from the storage portion 14 to the nozzle 15 by the operation of the pump portion 15P, the composition X in the storage portion 14 decreases as it is supplied to the nozzle 15, and the internal pressure in the storage portion 14 decreases. As a result, the storage portion 14, which is made of a flexible and deformable material, deforms in a shrinking manner in response to the internal pressure.

[0075] The main body 10B includes a low-voltage power supply 11. The low-voltage power supply 11 is capable of generating a voltage of several volts to several tens of volts. In order to increase the portability of the electrospinning apparatus 10, it is preferable that the low-voltage power supply 11 is made of one or more batteries. In addition, by using a battery as the low-voltage power supply 11, there is also an advantage that it can be easily replaced as necessary. Instead of a battery, an AC adapter or the like can also be used as the low-voltage power supply 11.

[0076] The main body 10B includes a high-voltage power supply 12. The high-voltage power supply 12 is connected to the low-voltage power supply 11, and includes an electric circuit (not shown) that boosts the voltage generated by the low-voltage power supply 11 to a high voltage. The boost electric circuit is generally composed of a transformer, a capacitor, a semiconductor element, etc.

[0077] The main body 10B includes an auxiliary electric circuit 13. The auxiliary electric circuit 13 is interposed between the low-voltage power supply 11 and the high-voltage power supply 12, and has a function of adjusting the voltage of the low-voltage power supply 11 to stably operate the high-voltage power supply 12. Furthermore, the auxiliary electric circuit 13 has a function of controlling the rotation speed of a motor included in a power source 16 described later. By controlling the rotation speed of the motor, the amount of composition X supplied from a storage section 14 in which the composition X is stored to a nozzle 15 that discharges the composition X via a pump section 15P is controlled. A switch SW is attached between the auxiliary electric circuit 13 and the low-voltage power supply 11, and the electrostatic spinning apparatus 10 can be operated / stopped by turning the switch SW on and off.

[0078] The main body 10B further includes a power source 16 and a power transmission unit 17. The power source 17 in this embodiment generates power for discharging the composition X contained in the storage unit 14 from the nozzle 15 via the pump unit 15P. The power source 16 in the present invention is provided with a motor or the like, receives power from the low-voltage power source 11, and operates under the control of the auxiliary electric circuit 13 to generate power. The power generated by the power source 16 is configured to be able to supply a predetermined amount of the composition X from the storage unit 14 to the nozzle 15 via the pump unit 15P by the power transmission unit 17 that transmits the power to the pump unit 15P.

[0079] The power transmission section 17 provided in the main body section 10B transmits power generated from a power source 16 such as a motor to the pump section 15P. This allows the composition X contained in the storage section 14 to be supplied to the nozzle 15 via the pump section 15P. There is no particular limitation on the method of transmitting the power from the power source 16 to the pump section 15P, but for example, a convex structure (not shown) can be formed on the tip of the power transmission section 17 made of a shaft, and the convex structure can be fitted into a power transmission recess 15b provided in the pump section 15P, thereby transmitting the rotational power of the motor in the power source 16 to the pump section 15P.

[0080] Due to the conductive nature of the composition X used in the present invention, the high voltage applied to the nozzle 15 may be applied to the power source 16 via the pump section 15P or the power transmission section 17, which may damage the electrostatic spinning apparatus 10 or cause electric charge leakage and failure to spray. Therefore, in order to ensure the insulation of the electrostatic spinning apparatus 10 during use and to prevent the electrostatic spinning apparatus 10 from being damaged, and in order to prevent leakage of current via the composition X and ensure the stability of spinning, it is preferable that the power transmission section 17 electrically insulates the power source 16 from the cartridge section 10A. This effectively prevents the high voltage applied to the nozzle 15 from being unintentionally applied to the power source 16. As a method for electrically insulating the power source 16 from the cartridge section 10A, for example, a method of using a member made of a non-conductive material such as plastic or ceramic as the power transmission section 17 can be mentioned. As long as the power transmission section 17 electrically insulates the power source 16 from the cartridge section 10A, the other constituent materials may be conductive or non-conductive.

[0081] With the above configuration, the amount of composition X supplied from the storage unit 14 to the nozzle 15 can be precisely controlled, and the portability of the electrospinning apparatus 10 can be further improved due to the miniaturization of the main body unit 10B.

[0082] The usage mode of the electrospinning device will be described with reference to FIG. The electrospinning apparatus 10 having the configuration shown in the embodiment shown in Figs. 1 to 6 can be used, for example, as shown in Fig. 7. Fig. 7 shows a handy type electrospinning apparatus 10 having a size that can be held in one hand. In the electrospinning apparatus 10 shown in the figure, all of the components shown in the configuration diagrams of Figs. 1, 2, or 5 are housed in a cylindrical housing 20. Although the housing 20 shown in Fig. 7 is cylindrical, the shape of the housing 20 is not particularly limited as long as it has a size that can be held in one hand and houses all of the components shown in Fig. 1, and may be a cylindrical shape such as an elliptical cylinder or a regular polygonal cylinder. The "size that can be held in one hand" refers to a weight of the housing 20 in which the electrospinning apparatus 10 is housed, which is preferably 2 kg or less, a maximum length in the longitudinal direction of the housing 20, which is preferably 40 cm or less, and a volume of the housing 20, which is preferably 3000 cm. 3 It is preferable that the following is true. A nozzle (not shown) is disposed at one end 10a in the longitudinal direction of the housing 20. The nozzle is disposed in the housing 20 so that the spray direction of the composition X coincides with the vertical direction of the housing 20 and is convex toward the skin. By disposing the nozzle tip so that it is convex toward the skin in the vertical direction of the housing 20, the composition X is less likely to adhere to the housing, and a coating can be stably formed.

[0083] [Formation of a film on the surface of the human body] Next, the formation of a coating on the surface of the human body will be described. When the electrospinning apparatus 10 is operated, a user, i.e., a person who forms a coating on a part of the human body surface where a coating is to be formed by electrospinning, holds the apparatus 10 by hand and directs one end 10a of the apparatus 10, where a nozzle (not shown) is located, to the application site where electrospinning is to be performed. FIG. 7 shows a state in which one end 10a of the electrospinning apparatus 10 is directed to the inside of the forearm of the user. In this state, the switch of the apparatus 10 is turned on to perform electrospinning. When the power is turned on to the apparatus 10, an electric field is generated between the nozzle and the skin. In the embodiment shown in FIG. 7, a positive high voltage is applied to the nozzle, and the skin becomes the negative electrode. When an electric field is generated between the nozzle and the skin, the composition X at the tip of the nozzle is polarized by electrostatic induction, and the tip part becomes cone-shaped, and droplets of the charged composition X are discharged from the tip of the cone along the electric field into the air (atmosphere) toward the skin. When the solvent component (a) evaporates from the charged composition X discharged into space (air), the charge density on the surface of the composition X becomes excessive, and the composition spreads into space while repeatedly being finely divided by Coulomb repulsion, and reaches the skin. In this case, by appropriately adjusting the viscosity of the composition X, the discharged composition can be made to reach the application site in the form of droplets. In addition, while being discharged into space, the volatile substance as the solvent is evaporated from the droplets, and the polymer having film-forming ability as the solute is solidified, while being elongated and deformed by the potential difference to form fibers, and the fibers can be deposited on the application site. For example, by increasing the viscosity of the composition X, the composition is easily deposited on the application site in the form of fibers. As a result, a porous coating, which is a fiber deposit, is formed on the surface of the application site. Such a porous coating, which is a fiber deposit, can also be formed by adjusting the distance between the nozzle and the skin or the voltage applied to the nozzle.

[0084] During electrospinning, a high potential difference occurs between the nozzle and the surface of the human body. However, the impedance is very large, so the current flowing through the human body is extremely small. The inventors have confirmed that the current flowing through the human body during electrospinning is several orders of magnitude smaller than the current flowing through the human body due to static electricity generated in normal life.

[0085] When a fiber deposit is formed by electrospinning, the thickness of the fiber, expressed as a circle equivalent diameter, is preferably 100 nm or more, more preferably 500 nm or more. Also, it is preferably 15,000 nm or less, more preferably 10,000 nm or less. The fiber thickness can be measured, for example, by observing the fiber at a magnification of 10,000 times using a scanning electron microscope (SEM), removing defects (fiber clumps, fiber intersections, and liquid droplets) from the two-dimensional image, arbitrarily selecting 10 fibers, drawing a line perpendicular to the longitudinal direction of the fiber, and directly reading the fiber diameter.

[0086] The coating, which is a fiber deposit formed by electrospinning, has moisture on the surface side of the fibers that constitute it. The surface side of the fiber means the surface, a part of the surface, or between the fibers. By changing the contents of components (b) and (c) in composition X, the adhesion and transparency of the coating formed on the surface of the human body can be improved. In addition, the coating, which is a fiber deposit formed by electrospinning, may contain a component derived from composition X.

[0087] In the case of skin containing sweat and sebum, the fibers tend to swell or plasticize due to the water and oil being compounded in the fibers. For example, when the same composition is electrostatically spun for 5 seconds on a metal surface not containing water or oil and on a skin surface containing water and oil, such as the palm, to produce a thin film, the fiber electrostatically spun on the skin surface becomes larger in diameter due to swelling over time when the change in fiber diameter is observed over time. In this way, the fiber-containing coating formed by electrostatic spinning becomes softer due to plasticization by the oil and water in the skin, improving the ability of the fiber itself to follow the skin texture, and moisture bleeds out from the fiber and exists on the fiber surface or between the fibers, making the fiber-containing coating translucent or transparent, giving it a natural appearance. In the case of a coating-forming object containing skin containing sweat and sebum, the fiber diameter due to swelling satisfies the following formula (1). (Fiber diameter after 30 seconds of spinning on skin) > (Fiber diameter after 30 seconds of spinning on metal plate) (1)

[0088] The contents of component (a), component (b), component (c) and component (d) in composition X are measured as follows. Component (a), which is a volatile substance, is not present in the formed coating, or volatilizes even if present, so the measurement is performed in a state in which the formed coating contains only components (b), (c) and (d), and their contents are measured as follows.

[0089] <Method for measuring the contents of components (b), (c) and (d) in composition X> There are methods for separation and identification in solution state using liquid chromatography (HPLC) and infrared spectroscopy (IR). With liquid chromatography, the components with larger molecular weights are eluted first, so it is possible to predict the molecular weight and identify the composition based on the elution position of the components. With IR analysis, it is also possible to assign and identify functional groups from individual absorbers, and generally identification is possible by comparing the IR chart of the component with the standard chart of commercially available additives.

[0090] <Method for measuring the contents of components (b), (c) and (d) in the formed coating> A solvent capable of dissolving the coating is searched for, and after dissolving the coating in the solvent, it is separated and identified by high performance liquid chromatography (HPLC) or by infrared spectroscopy (IR).

[0091] The fibers forming the coating are continuous fibers of infinite length in principle, but preferably have a length of at least 100 times the thickness of the fibers. In this specification, fibers having a length of 100 times the thickness of the fibers are defined as "continuous fibers". The coating produced by the electrospinning method is preferably a porous discontinuous coating that is a deposit of continuous fibers. A coating of this type can be handled as a single sheet as an assembly, and is very soft, and has the advantage of being difficult to break apart even when shear force is applied to it, and has excellent followability to body movements. Another advantage is that the coating can be easily removed completely. In contrast, a continuous coating without pores is not easy to peel off, and has low sweat dissipation, so there is a risk of sweating on the skin, etc. In addition, a porous discontinuous coating made of an assembly of particles is difficult to completely remove without damaging the skin, etc., as it requires an action such as applying friction to the entire coating in order to completely remove the coating.

[0092] In the electrostatic spinning process using the electrostatic spinning apparatus 10, the composition X that has been electrostatically spun into a fiber reaches the skin directly with the components (b), (c) and (d) charged while the component (a) evaporates. As described above, since the skin is also charged, the fibers adhere to the skin in the form of a single film by electrostatic force. Since the surface of the skin has fine unevenness such as texture, the fibers adhere to the surface of the skin in the form of a single film even more closely, coupled with the anchor effect of the unevenness. When the electrostatic spinning is completed in this manner, the power supply of the electrostatic spinning apparatus 10 is turned off. This causes the electric field between the nozzle and the skin to disappear, and the charge is fixed on the surface of the skin. As a result, the adhesion of the coating in the form of a single film is further developed, the coating is less likely to peel off from the edge during wear, and the durability during use is improved. In addition, since the fibers that make up the coating contain moisture, the coating does not feel strange, and excellent moisturizing and softening effects are obtained, allowing the coating to adhere sufficiently to the skin. The reason for this is believed to be that the presence of moisture on the surface or between the fibers softens the fibers themselves due to a plasticizing effect, improving their ability to conform to fine uneven surfaces, and moisture bleeds out onto the fiber surface, forming a liquid bridge between the fibers and the skin. Furthermore, since the film has a moisture-carrying coating in which moisture is present between the fibers or on the surface of the fibers that make up the coating, the fibers that make up the coating are less likely to reflect light, and the coating tends to appear transparent, allowing the skin to be covered in a natural-looking state. These effects are further enhanced by the application of liquid agent Y, which will be described later.

[0093] The distance between the nozzle and the surface of the human body depends on the voltage applied to the nozzle, but in order to successfully form a coating, it is preferably 10 mm to 160 mm, more preferably 20 mm to 150 mm, and even more preferably 40 mm to 150 mm. The distance between the nozzle and the skin can be measured using a commonly used non-contact sensor or the like.

[0094] Regardless of whether the electrospun coating contains fibers or not, the coating shall have a basis weight of 0.1 g / m 2 It is preferable that the content is 1 g / m or more. 2More preferably, it is 50 g / m or more. 2 It is preferable that the thickness is less than 40 g / m 2 For example, the basis weight of the coating is 0.1 g / m 2 More than 50g / m 2 It is preferable that the content is less than 1 g / m 2 More than 40g / m 2 By setting the basis weight of the coating in this manner, the adhesion of the coating can be improved.

[0095] In the present invention, before or after the electrospinning step of forming a coating on the surface of the human body by electrospinning described above, a step of applying a liquid agent Y other than composition X, which contains one or more selected from polyols that are liquid at 20 ° C. and oils that are liquid at 20 ° C., to the surface of the human body by a means other than electrospinning, for example, may be performed. By performing the step of applying liquid agent Y, the coating formed in the electrospinning step becomes more compatible with the application site, and the coating can be highly adhered to the skin and can also be made extremely transparent. For example, a step is less likely to occur between the end of the coating and the surface of the human body, thereby improving the adhesion between the coating and the surface of the human body. As a result, peeling or tearing of the coating is less likely to occur. In a more preferred embodiment, when the coating is a porous coating that is a deposit of fibers, the adhesion to the surface of the human body is high despite the high porosity, and a large capillary force is easily generated. Furthermore, when the fibers are fine, it is easy to increase the specific surface area of ​​the porous coating.

[0096] In particular, by carrying out a liquid agent Y application step before or after forming a porous coating, which is a fiber deposit, in the electrospinning step, a coating is formed in which the liquid agent Y is present between the fibers forming the porous coating and / or on the fiber surface. This improves the adhesion of the coating, and maintains or improves the transparency of the coating when viewed with the naked eye. In particular, when the coating is colorless and transparent or colored and transparent, the coating becomes more difficult to see, making it look like natural skin. Also, when the coating is colored and transparent, the coating has a sense of transparency, making it look like a part of the skin.

[0097] Examples of oils that are liquid at 20°C include linear or branched hydrocarbon oils such as liquid paraffin, light isoparaffin, liquid isoparaffin, squalane, and squalene; ester oils such as monoalcohol fatty acid esters, monoglycerin fatty acid esters, triglycerin fatty acid esters, and polyhydric alcohol fatty acid esters; silicone oils such as dimethylpolysiloxane, dimethylcyclopolysiloxane, methylphenylpolysiloxane, methylhydrogenpolysiloxane, and higher alcohol-modified organopolysiloxane; and higher alcohols. Among these, from the viewpoint of usability such as smoothness during application, one or more selected from hydrocarbon oils and ester oils are preferred. In addition, it is also possible to contain vegetable oils such as olive oil and jojoba oil that contain multiple types of hydrocarbon oils and ester oils, and animal oils such as liquid lanolin, or one or more liquid oils selected from the above-mentioned oils that are liquid at 20°C can be used in combination.

[0098] Examples of the hydrocarbon oil include liquid paraffin, squalane, squalene, n-octane, n-heptane, cyclohexane, light isoparaffin, and liquid isoparaffin. From the viewpoint of usability, one or more selected from liquid paraffin and squalane are preferred. From the viewpoint of adhering the electrostatically discharged coating to the skin, the viscosity of the hydrocarbon oil at 30°C is preferably 10 mPa·s or more, more preferably 30 mPa·s or more. From this viewpoint, the total content of isododecane, isohexadecane, and hydrogenated polyisobutene, which have a viscosity of less than 10 mPa·s at 30°C, in the liquid agent Y is preferably 10% by mass or less, more preferably 5% by mass or less, even more preferably 1% by mass or less, and even more preferably 0.5% by mass or less, and may not be contained. Similarly, from the viewpoint of allowing the electrostatically discharged coating to adhere to the skin, the viscosity of the ester oil and silicone oil at 30° C. is preferably 10 mPa s or more, and more preferably 30 mPa s or more. The viscosity here is measured at 30° C. using a BM type viscometer (manufactured by Tokimec Co., Ltd., measurement conditions: rotor No. 1, 60 rpm, 1 minute).

[0099] From the same viewpoint, the total content of ether oils such as cetyl-1,3-dimethylbutyl ether, dicapryl ether, dilauryl ether, diisostearyl ether, etc. in the liquid agent Y is preferably 10% by mass or less, more preferably 5% by mass or less, and even more preferably 1% by mass or less.

[0100] The ester oils include esters of linear or branched fatty acids and linear or branched alcohols or polyhydric alcohols.Specific examples of the ester oils include isopropyl myristate, cetyl octanoate, octyldodecyl myristate, isopropyl palmitate, butyl stearate, hexyl laurate, myristyl myristate, decyl oleate, hexyldecyl dimethyloctanoate, cetyl lactate, myristyl lactate, lanolin acetate, isocetyl stearate, isocetyl isostearate, cholesteryl 12-hydroxystearate, ethylene glycol di-2-ethylhexanoate, dipentaerythritol fatty acid esters, mono N-Alkyl glycol isostearate, neopentyl glycol dicaprate, diisostearyl malate, glycerin di-2-heptyl undecanoate, trimethylolpropane tri-2-ethylhexanoate, trimethylolpropane triisostearate, pentaerythritol tetra-2-ethylhexanoate, glyceryl tri-2-ethylhexanoate, trimethylolpropane triisostearate, cetyl 2-ethylhexanoate, 2-ethylhexyl palmitate, diethyl naphthalene dicarboxylate C12-15 alkyl benzoate, cetearyl isononanoate, caprylic / capric triglyceride, butylene glycol dicaprylic / capric acid, glyceryl trilaurate, glyceryl trimyristate, glyceryl tripalmitate, glyceryl triisostearate, glyceryl tri-2-heptylundecanoate, glyceryl tribehenate, glyceryl tricocoate, methyl ester of castor oil fatty acids, oleyl oleate, 2-heptyl palmitate Examples of suitable oleic acid salts include lauroyl undecyl, diisobutyl adipate, N-lauroyl-L-glutamic acid 2-octyldodecyl ester, di-2-heptylundecyl adipate, ethyl laurate, di-2-ethylhexyl sebacate, 2-hexyldecyl myristate, 2-hexyldecyl palmitate, 2-hexyldecyl adipate, diisopropyl sebacate, di-2-ethylhexyl succinate, triethyl citrate, 2-ethylhexyl paramethoxycinnamate, and tripropylene glycol dipivalate.

[0101] Among these, from the viewpoint of adhering the electrostatically discharged coating to the skin and from the viewpoint of excellent sensation when applied to the skin, octyldodecyl myristate, myristyl myristate, isocetyl stearate, isocetyl isostearate, cetearyl isononanoate, diisobutyl adipate, di-2-ethylhexyl sebacate, isopropyl myristate, isopropyl palmitate, diisostearyl malate, neopentyl glycol dicaprate, alkyl benzoate (carbon number 12 to 15), tri(capryl) At least one selected from isopropyl myristate, isopropyl palmitate, diisostearyl malate, neopentyl glycol dicaprate, alkyl benzoates (having 12 to 15 carbon atoms), and tri(caprylic acid / capric acid)glycerin is preferred, at least one selected from neopentyl glycol dicaprate, alkyl benzoates (having 12 to 15 carbon atoms), and tri(caprylic acid / capric acid)glycerin is more preferred, and at least one selected from neopentyl glycol dicaprate, alkyl benzoates (having 12 to 15 carbon atoms), and tri(caprylic acid / capric acid)glycerin is even more preferred.

[0102] As the triglyceride, fatty acid triglycerides are preferred, and for example, those contained in natural oils such as olive oil, jojoba oil, macadamia nut oil, medfoam oil, castor oil, safflower oil, sunflower oil, avocado oil, canola oil, apricot kernel oil, rice germ oil, and rice bran oil may be contained as natural oils.

[0103] The higher alcohol may be a liquid higher alcohol having 12 to 20 carbon atoms, and specific examples thereof include isostearyl alcohol and oleyl alcohol.

[0104] Examples of preservatives include phenoxyethanol, methyl parahydroxybenzoate, ethyl paraaminobenzoate, isobutyl parahydroxybenzoate, isopropyl parahydroxybenzoate, ethyl parahydroxybenzoate, butyl parahydroxybenzoate, propyl parahydroxybenzoate, benzyl parahydroxybenzoate, and ethylhexanediol.

[0105] Examples of silicone oils include dimethylpolysiloxane, dimethylcyclopolysiloxane, methylphenylpolysiloxane, methylhydrogenpolysiloxane, and higher alcohol-modified organopolysiloxane. The kinetic viscosity of silicone oil at 25°C is 3 mm 2 / s or more is preferable, 4mm 2 / s or more is preferable, and 5mm 2 / s or more is more preferable, and 30 mm 2 / s or less is preferable, 20 mm 2 / s or less is preferable, and 10 mm 2 / s or less is even more preferable. Among these, it is preferable to contain dimethylpolysiloxane from the viewpoint of adhering the electrostatically discharged coating to the skin.

[0106] The content of the liquid oil in the liquid agent Y is preferably 0.1% by mass or more, more preferably 0.5% by mass or more, and even more preferably 5% by mass or more. Also, it is preferably 100% by mass or less. The content of the liquid oil in the liquid agent Y is preferably 0.1% by mass or more and 100% by mass or less, more preferably 0.5% by mass or more and 100% by mass or less.

[0107] The HLB value of the liquid oil is preferably 10 or less, more preferably 8 or less, and even more preferably 6 or less. The HLB value is an index showing the hydrophilic-lipophilic balance, and in the present invention, the value calculated by the following formula proposed by Oda and Teramura et al. is used. HLB = (Σ inorganic value / Σ organic value) × 10

[0108] Examples of polyols that are liquid at 20° C. and are used in the liquid agent Y include alkylene glycols such as ethylene glycol, propylene glycol, 1,3-propanediol, and 1,3-butanediol; polyalkylene glycols such as diethylene glycol, dipropylene glycol, polyethylene glycols having a weight average molecular weight of 2000 or less, and polypropylene glycol; and glycerins such as glycerin, diglycerin, and triglycerin. Among these, from the viewpoint of usability such as smoothness during application, one or more selected from ethylene glycol, propylene glycol, 1,3-butanediol, dipropylene glycol, polyethylene glycols having a weight average molecular weight of 2000 or less, glycerin, and diglycerin are preferred, and one or more selected from propylene glycol, 1,3-butanediol, and glycerin are more preferred, and one or more selected from propylene glycol and 1,3-butanediol are even more preferred.

[0109] It is preferable that the liquid Y has a viscosity of 5000 mPa s or less at 25° C. in order to improve the adhesion between the coating formed by the electrospinning method and the application site. The method for measuring the viscosity of the liquid is as described above.

[0110] Various methods can be used to apply the liquid agent Y to the skin. For example, by applying the liquid agent Y to the skin by a method such as dripping or sprinkling, and providing a step of spreading the liquid agent Y, it becomes possible to blend the liquid agent Y with the skin or coating, and a thin layer of the liquid agent Y can be formed. The step of spreading the liquid agent Y can be, for example, a method such as rubbing with a user's finger or a tool such as an applicator. The liquid agent Y may be simply dripped or sprinkled, but by providing a step of spreading the liquid agent Y, it becomes possible to blend the liquid agent Y with the skin or coating, and the adhesion of the coating can be sufficiently improved. Alternatively, the liquid agent Y can be ejected onto the skin to form a thin layer of the liquid agent Y. In this case, a separate spreading step is not particularly necessary, but the operation of spreading the liquid agent Y after ejection is not prevented. In addition, when the liquid agent Y is applied after the formation of the coating, a sufficient amount of the liquid agent Y is applied to the skin, and the excess liquid agent Y can be removed by a step of contacting a sheet material with the area where the liquid agent has been applied.

[0111] The amount of Liquid Y applied to the skin should be a necessary and sufficient amount to improve the adhesion between the skin and the coating. When Liquid Y contains liquid oil, the amount of Liquid Y applied to the skin should be such that the basis weight of the liquid oil is preferably 0.1 g / m2, from the viewpoint of ensuring the adhesion between the skin and the coating. 2 More preferably, it is 0.2 g / m or more. 2 The amount is preferably 40 g / m or more. 2 More preferably, it is 35 g / m or less. 2 For example, the amount of liquid agent Y applied to the skin is preferably such that the basis weight of the liquid oil is 0.1 g / m 2 More than 40g / m 2 Less than or equal to 0.2 g / m 2 More than 35g / m 2 The quantity is as follows: The amount of the liquid agent Y applied to the skin or coating is preferably 5 g / m from the viewpoint of improving the adhesion between the skin and the coating and improving the transparency. 2 More preferably, it is 10 g / m 2 More preferably, it is 15 g / m 2More preferably, it is 50 g / m 2 More preferably, it is 45 g / m 2 The following is the result.

[0112] In the embodiment of the present invention described above, a person who wishes to form a coating on his or her own skin holds the electrospinning apparatus 10 and generates an electric field between the conductive nozzle of the apparatus 10 and the person's skin. However, as long as an electric field is generated between the two, the person who wishes to form a coating on his or her own skin does not need to hold the electrospinning apparatus 10.

[0113] [Sheet for application to the surface of the human body] The present invention further relates to the following components (B) and (d): (B) Water-insoluble polymer (d) one or more water-soluble deodorizing components selected from polyhydroxyamines, polyethyleneimines, alkanolamines, basic amino acids or their polymers, and alkali metal phosphates; A sheet containing fibers containing the above-mentioned compound, wherein the mass ratio (d) / (B) of component (d) to component (B) is 0.01 or more and 0.9 or less, and the basis weight is 0.05 g / m 2 More than 50g / m 2 The following provides a sheet to be applied to the surface of the human body, wherein the fibers have an equivalent circle diameter of 100 nm or more and 15,000 nm or less.

[0114] The sheet for application to the human body surface of the present invention is formed by discharging the above-mentioned composition X from an electrospinning device to a location other than the human body surface, and depositing fibers containing components (B) and (d) in a film-like form. A flat substrate layer can be used as the location other than the human body surface to facilitate application to the human body surface. Here, examples of the flat substrate layer include chemical fiber cloth, and those with good releasability are preferred, such as synthetic resin films such as polyolefin, polyester, acrylic, rayon, and polyurethane, and natural cellulose fibers such as cotton, pulp, and paper.

[0115] The sheet for application to the human body surface of the present invention can be peeled off from the planar base layer after the volatile substances of the above-mentioned component (a) have almost evaporated and the water of the component (c) has partially evaporated. The sheet can be peeled off and applied directly to the human body surface, or the sheet formed on the base layer can be pressed against the human body surface and applied to the human body surface, thereby deodorizing the malodor emitted from the human body surface.

[0116] The content of component (B) in the sheet for application to the human body surface is preferably 40% by mass or more, more preferably 50% by mass or more, and even more preferably 60% by mass or more. It is also preferably 98% by mass or less, more preferably 96% by mass or less, and even more preferably 95% by mass or less. The content of component (B) in the sheet for application to the human body surface is preferably 40% by mass or more and 98% by mass or less, more preferably 50% by mass or more and 96% by mass or less, and even more preferably 60% by mass or more and 95% by mass or less.

[0117] The content of component (d) in the sheet for application to the human body surface is preferably 2% by mass or more, more preferably 3% by mass or more, even more preferably 4% by mass or more, and even more preferably 5% by mass or more, from the viewpoint of improving the deodorizing effect. Also, from the viewpoint of the stability of the sheet, it is preferably 40% by mass or less, more preferably 30% by mass or less, even more preferably 20% by mass or less, and even more preferably 15% by mass or less. The content of component (d) in the sheet for application to the human body surface is preferably 2% by mass or more and 40% by mass or less, more preferably 3% by mass or more and 30% by mass or less, even more preferably 4% by mass or more and 20% by mass or less, and even more preferably 5% by mass or more and 15% by mass or less.

[0118] The mass ratio (d) / (B) of component (d) to component (B) is 0.01 or more, preferably 0.02 or more, more preferably 0.04 or more, and even more preferably 0.1 or more, from the viewpoint of improving the deodorizing effect, and from the viewpoint of suppressing adhesion between the water-insoluble polymer fibers and maintaining a laminated state with a high surface area, it is 0.9 or less, preferably 0.8 or less, more preferably 0.7 or less, and even more preferably 0.6 or less. Note that, the lower this ratio, the better the quality of the water-insoluble polymer fibers are and the easier they are to laminate, but the deodorizing effect per sheet mass is reduced. Therefore, when the mass ratio (d) / (B) is low, the basis weight can be increased to achieve both the quality of the water-insoluble polymer fibers and the deodorizing effect. In addition, the sheet for application to the human body surface of the present invention may contain a component derived from composition X in addition to the above components (B) and (d).

[0119] The basis weight of the sheet for application to the human body surface is set at 0.05 g / m2 in order to achieve both the quality of the water-insoluble polymer fiber and the deodorizing effect. 2 More preferably, it is 0.1 g / m 2 More preferably, 0.5 g / m 2 More preferably, 1 g / m 2 More preferably, it is 3 g / m or more. 2 More than 50g / m 2 less than 40 g / m 2 Less than or equal to 30 g / m 2 More preferably, 20 g / m 2 The following is the result.

[0120] In the sheet for application to the human body surface, the equivalent circle diameter of the fiber containing components (B) and (d) is 100 nm or more and 15000 nm or less, preferably 500 nm or more and 10000 nm or less. The fiber thickness can be measured, for example, by observing the fiber at 10000 times magnification using a scanning electron microscope (SEM), removing defects (fiber clumps, fiber intersections, and liquid droplets) from the two-dimensional image, arbitrarily selecting 10 fibers, drawing a line perpendicular to the longitudinal direction of the fiber, and directly reading the fiber diameter. EXAMPLES

[0121] Examples 1 to 19, Comparative Examples 1 to 4 Composition X having the composition shown in Tables 1 to 3 was prepared, a coating was formed using an electrostatic spinning device, and various evaluations were performed. Note that all of the water-soluble deodorant components used were confirmed to satisfy the above-mentioned water-solubility conditions prior to the experiment.

[0122] State of composition X Composition X prepared according to the recipe shown in Tables 1 to 3 was stirred at 60 rpm for 6 hours, allowed to stand overnight, and then visually observed for its condition and evaluated according to the following criteria. ×: Precipitation (cloudy precipitation, powdery precipitation) ○: Transparent or almost uniformly dispersed

[0123] Film formation method A coating was formed by electrospinning on a commercially available chemical fiber cloth as a skin model using composition X shown in Tables 1 to 3. Specifically, a plastic container 6.5 cm in diameter and 3.5 cm in height was covered with an 11 cm square piece of black chemical fiber cloth (40% by mass of acrylic fiber, 35% by mass of polyester, 22% by mass of rayon, 3% by mass of polyurethane), and a coating was formed from above using electrospinning under the following conditions. The state of electrospinning was evaluated according to the following criteria. ×: Unable to spin (prescription liquid is precipitated or sedimented and cannot be discharged) ○: Can be spun (can be extruded and forms a film on the fabric)

[0124] <Electrostatic spinning conditions> Applied voltage: 10kV Distance between nozzle and skin model: 10cm Discharge rate (flow rate) of composition X: 4mL / h Nozzle diameter: 0.8mm ·Environment: 25℃, 40%RH

[0125] The thickness (circle equivalent diameter) of the fibers constituting the formed coating was measured by the above-mentioned method using a scanning electron microscope (SEM) and was confirmed to be 2000 nm to 10000 nm.

[0126] Coating basis weight measurement method The same compositions as those shown in Tables 1 to 3 were prepared, and a coating was formed on the black chemical fiber cloth on the cup under the same conditions, and used for calculating the mass. After peeling off the coating with tweezers, the cloth was dried at 70°C for 1 hour in an electric dryer, and the mass was measured. The basis weight (g / m2) was calculated from the mass and the area of ​​the cup (area of ​​a circle with a diameter of 6.5 cm). 2 ) was obtained. By this method, the basis weight of all coatings was approximately 5 g / m 2 It was confirmed that.

[0127] Evaluation of film retention in a sweating model system. In order to check the shape retention of the coating formed as described above when the skin is sweating and wet, an observation evaluation was performed using a model system when sweating. Specifically, the cloth on which the coating was formed was peeled off from the cup, and water was sprayed 20 times (total of 1.4 g) from the back side of the cloth to moisten it. After 20 minutes, the state of the coating was observed to see if the shape of the coating was maintained (whether it had dissolved). ×: The coating dissolves (a sticky feeling typical of polymers occurs) ○: The coating is not dissolved.

[0128] Deodorizing evaluation A cotton ball with a drop of malodor (5 μL of 1% by weight propylene glycol isovalerate solution) was placed inside the cup, and the cloth on which the coating was formed was placed over the cup again and secured with a rubber band. After 20 minutes, the odor emanating from the cloth was displayed according to the following 6-level odor intensity rating, and an overall rating of ◎, ○, △, or × was given. When there was no coating, the odor intensity was rated 3.

[0129] <Six-level odor intensity display> 0: Odorless 1: Smell that can barely be detected (detection threshold) 2: Weak odor that can be identified (cognitive threshold) 3. Easy to detect odors 4: Strong odor 5: Strong odor

[0130] ◎: Very good deodorizing effect (isovaleric acid odor is 0 or 1) ○: Good deodorizing effect (odor of isovaleric acid is 2) △: Deodorizing effect is somewhat good (smell of isovaleric acid is 2.5) ×: No deodorizing effect (smell of isovaleric acid is 3 or more)

[0131] [Table 1]

[0132] [Table 2]

[0133] [Table 3]

[0134] Example 20 Using composition X of Example 10, a coating was formed on a commercially available chemical fiber fabric by electrostatic spinning under the same conditions as above. Area 20cm 2 A coating of 40 mg per sheet (basis weight 10 g / m) was formed on the chemical fiber cloth (acrylic fiber 40% by mass, polyester 35% by mass, rayon 22% by mass, polyurethane 3% by mass) used in the coating formation. 2 The film was peeled off from the synthetic fiber cloth and applied to the depilated armpit area. After exercise during the day, the condition of the coating was maintained and a deodorizing effect on the armpits was also observed.

[0135] Example 21 Composition X of Example 4 was sprayed evenly directly onto half of the toes using an electrostatic spinning device (for about 30 seconds, application amount about 20 mg). After exercise during the day, the condition of the coating was maintained and a deodorizing effect on the soles of the feet was also observed. [Explanation of symbols]

[0136] 10. Electrostatic spinning device 11 Low voltage power supply 12 High voltage power supply 13 Auxiliary Electrical Circuits 14 Container 15 Nozzles 15A Micro Gear Pump 15B Pipeline 15C Flexible Pipe 19 Current limiting resistor 20. Cabinet

Claims

1. Composition X used to produce a fiber deposit upon discharge from an electrospinning apparatus, comprising: Contains the following components (a) to (e): The content of component (b) is 4% by mass or more and 12% by mass or less, The content of component (d) is 0.3% by mass or more and 5% by mass or less, The content of component (e) is 1% by mass or more and 5% by mass or less, The mass ratio (d) / (b) of the component (d) to the component (b) is 0.01 or more and 0.9 or less; Composition X. (a) one or more volatile substances selected from alcohols and ketones (b) Polyvinyl butyral resin (c) water (d) one or more water-soluble deodorizing components selected from polyhydroxyamines, polyethyleneimines, alkanolamines, basic amino acids or their polymers, and alkali metal phosphates; (e) Polypropylene glycol

2. The composition X according to claim 1, wherein the content of component (c) is 6% by mass or more and 24% by mass or less.

3. The composition X according to claim 1 or 2, wherein the mass ratio (b) / (c) is 0.22 or more and 3 or less.

4. The composition X according to any one of claims 1 to 3, wherein the mass ratio (a) / (c) is 3 or more and 10 or less.

5. The composition X according to any one of claims 1 to 4, wherein the mass ratio (d) / (c) is 0.02 or more and 1 or less.

6. Contains the following components (a) to (e): The content of component (b) is 4% by mass or more and 12% by mass or less, The content of component (d) is 0.3% by mass or more and 5% by mass or less, The content of component (e) is 1% by mass or more and 5% by mass or less, The mass ratio (d) / (b) of the component (d) to the component (b) is 0.01 or more and 0.9 or less. A method for forming a fiber-containing coating on a human body surface by electrostatically spinning composition X onto the human body surface. (a) one or more volatile substances selected from alcohols and ketones (b) Polyvinyl butyral resin (c) water (d) one or more water-soluble deodorizing components selected from polyhydroxyamines, polyethyleneimines, alkanolamines, basic amino acids or their polymers, and alkali metal phosphates; (e) Polypropylene glycol

7. 7. The method for forming a coating according to claim 6, wherein the surface of the human body is selected from the group consisting of skin, mucous membrane, and wounds.

8. 7. The method for forming a coating according to claim 6, wherein the surface of the human body is the skin of the armpits, legs or buttocks.

9. The method for forming a coating film according to any one of claims 6 to 8, wherein the content of component (c) in composition X is 6 mass % or more and 24 mass % or less.

10. The method for forming a coating film according to any one of claims 6 to 9, wherein the mass ratio (b) / (c) in the composition X is 0.22 or more and 3 or less.

11. The method for forming a coating film according to any one of claims 6 to 10, wherein the mass ratio (a) / (c) in the composition X is 3 or more and 10 or less.

12. The method for forming a coating film according to any one of claims 6 to 11, wherein the mass ratio (d) / (c) in the composition X is 0.02 or more and 1 or less.

13. The following components (B), (d) and (e) (B) Polyvinyl butyral resin (d) one or more water-soluble deodorizing components selected from polyhydroxyamines, polyethyleneimines, alkanolamines, basic amino acids or their polymers, and alkali metal phosphates; (e) Polypropylene glycol A sheet comprising fibers containing The content of component (B) is 40% by mass or more and 98% by mass or less, the mass ratio (d) / (B) of the component (d) to the component (B) is 0.01 or more and 0.9 or less; Basis weight 0.05 g / m 2 50g / m or more 2 is as follows: The equivalent circle diameter of the fiber is 100 nm or more and 15000 nm or less. A sheet for application to the surface of the human body.

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