TW201841606A - Method for manufacturing decorative film - Google Patents

Abstract

Provided is a method for manufacturing a film that has high adherence to the skin, has excellent usability in that it has little stickiness, and is able to improve the effectiveness of makeup, by means of an electrostatic spraying method. The method for manufacturing a film on the skin is characterized by directly performing electrostatic spraying, onto the skin, of a composition that includes a component (a), a component (b), and a component (c), wherein (a) is one or more volatile substances selected from water, alcohols, and ketones, (b) is a polymer having film-forming properties, and (c) is an oil that is solid at 20 DEG C.

Description

 Method for producing cosmetic film  

The present invention relates to a method of producing a cosmetic film.

Various methods for forming a film by electrostatic spraying are known. For example, Patent Document 1 discloses a skin treatment method comprising electrostatically spraying a composition onto the skin. The composition used in this method contains a liquid insulating material, a conductive material, a particulate powder material, and a tackifier. As such a composition, a cosmetic or skin care composition containing a pigment is typically used. Specifically, a cosmetic foundation is used as a composition. In other words, in the invention described in Patent Document 1, the cosmetic foundation is electrostatically sprayed for the purpose of beauty, and is mainly set to apply makeup to the skin.

Patent Document 2 describes a disposable crucible for use in an electrostatic spray device for cosmetics. This electrostatic spraying device is a hand-held type. This electrostatic coating apparatus is used to spray a cosmetic foundation in the same manner as in Patent Document 1 described above.

[Patent Document 1] Japanese Patent Laid-Open Publication No. 2006-104211

[Patent Document 2] Japanese Patent Laid-Open Publication No. 2003-507165

The present invention provides a method for producing a film on a skin, which is characterized in that a composition containing the component (a), the component (b) and the component (c) is directly electrostatically sprayed onto the skin.

(a) one or more volatile substances selected from the group consisting of water, alcohols, and ketones; (b) a polymer having a film forming ability; and (c) an oil having a solid shape at 20 °C.

10‧‧‧Electrostatic spraying device

10a‧‧‧End

11‧‧‧Low voltage power supply

12‧‧‧High voltage power supply

13‧‧‧Auxiliary circuit

14‧‧‧Micro gear pump

15‧‧‧ Container

16‧‧‧ nozzle

17‧‧‧pipe

18‧‧‧Flexible pipeline

19‧‧‧ Current limiting resistor

20‧‧‧ frame

SW‧‧ switch

Fig. 1 is a schematic view showing the configuration of an electrostatic coating apparatus used in the present invention.

Fig. 2 is a schematic view showing a state in which an electrostatic spray method is performed using an electrostatic spray device.

However, when an oil-containing cosmetic such as a lotion or an emulsion is applied to the skin, when the powder is applied, the foundation is poorly adhered due to oil or the like in the cosmetic, or the foundation is caused by contact with the clothes or the skin. The case of color shift. Further, although the solid shape oil in the cosmetic material can be expected to have moisture retention, it is proportional to the effect, and the viscosity is increased, and the feeling of use is deteriorated. In the case of applying a cosmetic containing solid-form oil or the like to the skin to form a cosmetic film, according to the methods described in Patent Documents 1 and 2, it is attempted to form a cosmetic film by electrostatic spraying, but the resulting cosmetic film is not sufficiently The skin is sticky, and the sticky feeling and color effect are not improved.

Therefore, the present invention provides a method for producing a film having high adhesion to the skin, a small stickiness, a good feeling of use, and an improved color effect by the electrostatic spraying method.

The inventors of the present invention conducted various reviews on the composition of the spray composition used in the electrostatic spray method, and as a result, found that, in addition to the polymer having a film forming ability and a volatile substance, the solid shape was further adjusted at 20 ° C. Oil, the adhesion of the film when the electrostatic spray is directly applied to the skin is remarkably improved, and the resulting film is not sticky, and the makeup effect is also improved.

According to the present invention, it is possible to form a film having a high adhesion between the skin and the film formed by electrostatic spraying, and having less adhesion and an excellent effect of improving the makeup effect.

Hereinafter, the present invention will be described with reference to the drawings based on preferred embodiments. The production method of the present invention is a method for producing a film formed by coating a film on the skin surface. In the present embodiment, a composition containing a predetermined component is directly applied to the skin to form a film. As a method of forming a film, the present invention employs an electrostatic spray method. The electrostatic spray method is a method in which a positive or negative high voltage is applied to a composition to charge the composition, and the charged composition is sprayed toward the skin. The sprayed composition is repetitively refined and expanded into space by Coulomb repulsion, and during its process or after attachment to the skin, the solvent belonging to the volatile substance is dried to form a film on the surface of the skin.

The above-described composition used in the present invention (hereinafter, this composition is also referred to as "a composition for spraying") is liquid in an environment where an electrostatic spray method is applied. This composition contains the following components (a), (b), and (c).

(a) one or more volatile substances selected from the group consisting of water, alcohols, and ketones; (b) a polymer having a film forming ability; and (c) an oil having a solid shape at 20 °C.

Each component will be described below.

The volatile substance of the component (a) is a substance which is volatile in the state of a liquid. In the composition for spraying, the component (a) is prepared by appropriately charging the composition for spraying placed in an electric field, and then discharging it from the tip end of the nozzle toward the skin, and when the component (a) evaporates, The charge density of the composition for spraying becomes excessive, which is made finer by the Coulomb repulsion and the component (a) is further evaporated to finally form a dried film. In order to achieve the object, the vapor pressure of the volatile substance 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, still more preferably 0.67 kPa or more and 40.00 kPa or less, furthermore at 20 ° C. It is preferably 1.33 kPa or more and 40.00 kPa or less.

Among the volatile substances of the component (a), for example, a monohydric chain aliphatic alcohol, a monohydric cyclic aliphatic alcohol, or a monovalent aromatic alcohol is suitably used as the alcohol. The monovalent chain aliphatic alcohol may, for example, be a C ₁ to C ₆ alcohol, and the monocyclic aliphatic alcohol may, for example, be a C ₄ to C ₆ cyclic alcohol, and the monovalent aromatic alcohol may, for example, be benzyl alcohol. Phenylethyl alcohol and the like. Specific examples of such may, for example, be ethanol, isopropanol, butanol, phenylethyl alcohol, n-propanol or n-pentanol. One or two or more kinds selected from these may be used.

Among the volatile substances of the component (a), the ketone is a di-C ₁ -C ₄ alkyl ketone, and examples thereof include acetone, methyl ethyl ketone, and methyl isobutyl ketone. These ketones may be used alone or in combination of two or more.

The volatile matter of the component (a) is preferably one or more selected from the group consisting of ethanol, isopropyl alcohol, butanol and water, more preferably one or more selected from the group consisting of ethanol and butanol, and furthermore. It is good to contain at least ethanol.

The content of the component (a) in the composition for spraying is preferably 50% by mass or more, more preferably 55% by mass or more, still more preferably 60% by mass or more. Further, it is preferably 98% by mass or less, more preferably 96% by mass or less, still more preferably 94% by mass or less. The content of the component (a) in the composition for spraying is preferably 50% by mass or more and 98% by mass or less, more preferably 55% by mass or more and 96% by mass or less, still more preferably 60% by mass or more and 94% by mass or less. By containing the component (a) in the spray composition in this ratio, the composition for spraying can be sufficiently volatilized when the electrostatic spray method is performed.

Further, the amount of the volatile matter of the component (a) is preferably 50% by mass or more, more preferably 65% by mass or more, still more preferably 80% by mass or more. Further, it is preferably 100% by mass or less. The amount of the volatile matter of the component (a) 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, still more preferably 80% by mass or more and 100% by mass. %the following.

The polymer having a film forming ability belonging to the component (b) is generally a substance which is soluble in the volatile matter of the component (a). Here, the term "dissolution" means a state of dispersion at 20 ° C, and the state of dispersion is regarded as a uniform state depending on the purpose, and it is preferably a transparent or translucent state.

The polymer having a film forming ability is suitably used in combination with the properties of the volatile substance of the component (a). Specifically, a polymer having a film forming ability is roughly classified into a water-soluble polymer and a water-insoluble polymer. In the present specification, the term "water-soluble polymer" means a polymer which is impregnated in 10 g of ion-exchanged water after weighing 1 g of the polymer in an atmosphere of 1 atm. and 23 ° C, and after 24 hours. 0.5 g or more of the properties dissolved in water. On the other hand, the term "water-insoluble polymer" as used in the present specification means that after weighing 1 g of the polymer in an atmosphere of 1 atm and 23 ° C, it is immersed in 10 g of ion-exchanged water, and after 24 hours, More than 0.5 g of the impregnated polymer does not dissolve in water.

Examples of the water-soluble film-forming ability polymer include polytriglucose, hyaluronic acid, chondroitin sulfate, poly- γ -glutamic acid, modified corn starch, β-glucan, and grape oligosaccharide. Mucopolysaccharides such as heparin, keratan sulfate, cellulose, pectin, wood glue, lignin, glucomannan, galacturonic acid, flax-purple seed gum, tamarind gum, gum arabic, tracagan Natural high in rubber, soybean water-soluble polysaccharide, alginic acid, carrageenan, laminaria, cold (yellow sugar), fucoidan, methylcellulose, hydroxypropylcellulose, hydroxypropylmethylcellulose, etc. a molecule, a partially alkalized polyvinyl alcohol (in the case where a crosslinking agent is not used), a synthetic polymer having a low alkalinized polyvinyl alcohol, polyvinylpyrrolidone (PVP), polyethylene oxide, sodium polyacrylate, etc. . These water-soluble polymers may be used alone or in combination of two or more. Among these water-soluble polymers, from the viewpoint of easy production of the film, it is preferred to use polytriglucose, partially alkalized polyvinyl alcohol, low alkalinized polyvinyl alcohol, polyvinylpyrrolidone, and polycyclic ring. A synthetic polymer such as oxyethane. When polyethylene oxide is used as the water-soluble polymer, the number average molecular weight thereof is preferably 50,000 or more and 3,000,000 or less, more preferably 100,000 or more and 2.5 million or less.

On the other hand, as a water-insoluble polymer having a film forming ability, for example, a fully alkalized polyvinyl alcohol which can be insolubilized after formation of a film, and a film formed by using a crosslinking agent together with a crosslinking agent can be used. Partially alkalized polyvinyl alcohol, poly(N-propionylethylidene imine) graft-dimethyloxane/ γ -aminopropylmethyloxirane copolymer, etc. It Oxazoline modified polyfluorene oxide, polyvinyl acetal diethylaminoacetate, zein (main component of corn protein), polyester, polylactic acid (PLA), polyacrylonitrile resin, polymethyl Acrylic resin such as acrylic resin, polystyrene resin, polyvinyl butyral resin, polyethylene terephthalate resin, polybutylene terephthalate resin, polyurethane resin, polyfluorene An amine resin, a polyimide resin, a polyamidoximine resin, or the like. These water-insoluble polymers may be used alone or in combination of two or more. Among these water-insoluble polymers, a fully alkalized polyvinyl alcohol which can be insolubilized after the formation of a film, and a part of a base which can be cross-linked after being formed into a film by a combination with a crosslinking agent is preferable. Polyvinyl alcohol, polyvinyl butyral resin, polyurethane resin, poly(N-propionylethylidene) graft-dimethyloxane / γ -aminopropyl Alkoxysilane copolymer, etc. One or more selected from the group consisting of oxazoline-modified polyfluorene oxide, polyvinyl acetal diethylaminoacetate, and zein, more preferably selected from polyvinyl butyral resins and polyurethanes One type or two or more types of resins.

The content of the component (b) in the composition for spraying is preferably 2% by mass or more, more preferably 4% by mass or more, still more preferably 6% by mass or more. Further, it is preferably 50% by mass or less, more preferably 45% by mass or less, still more preferably 40% by mass or less. The content of the component (b) in the composition for spraying is preferably 2% by mass or more and 50% by mass or less, more preferably 4% by mass or more and 45% by mass or less, still more preferably 6% by mass or more and 40% by mass or less. By including the component (b) in the composition for a spray in this ratio, the target film can be efficiently formed.

The content ratio ((a)/(b)) of the component (a) to the component (b) in the composition for spraying is such that when the electrostatic spraying method is performed, the component (a) can be sufficiently volatilized to form a target film. From the viewpoint, it is preferably 0.5 or more and 40 or less, more preferably 1 or more and 30 or less, still more preferably 2 or more and 25 or less.

Moreover, the content ratio ((a)/(b)) of the ethanol (a) and the component (b) in the composition for spraying is such that when the electrostatic spraying method is performed, the ethanol (a) can be sufficiently volatilized to form a target coating. From the viewpoint of the film, it is preferably 0.5 or more and 40 or less, more preferably 1 or more and 30 or less, still more preferably 2 or more and 25 or less.

Component (c) is an oil having a solid shape at 20 °C. When the component (c) is contained in the composition for spraying, the adhesion between the film formed by electrostatic spraying and the skin becomes high, and it does not stick, thereby forming a film having an excellent makeup effect. Further, the formed film is excellent in water resistance and sweat resistance, and is not easily damaged by contact with skin or clothing. Further, when the oil having a solid shape at 20 ° C is applied to the skin, it is not uniformly applied due to the unevenness of the skin, and a uniform makeup effect cannot be obtained on the skin, but according to the present invention, uniform coating is formed on the skin. Membrane, so you can get a uniform makeup effect.

In the present invention, the oil having a solid shape at 20 ° C refers to an oil in which a melting peak is observed at 20 ° C or higher by differential scanning calorimetry (DSC). When the solid sample is melted, since more heat energy is absorbed as the heat of fusion than the reference material, it is confirmed that the melting peak which changes from the solid state to the liquid state is observed. In the present invention, the oil in which the peak is confirmed at 20 ° C or higher is defined as an oil having a solid shape at 20 ° C. The specific measurement method is the method described in the examples.

As the oil having a solid shape at 20 ° C, a user of a general cosmetic can be used, and it is not particularly limited. For example, waxes, cholesterol derivatives, phytol derivatives, dipentaerythritol fatty acid esters, triglycerides, lanolin, lanosterol derivatives, petrolatum, ceramides, advanced Alcohols and higher fatty acids.

The wax may, for example, be an ester wax such as rice bran wax, palm wax, candid wax, beeswax or cetyl wax, a paraffin wax, a paraffin wax, a microcrystalline wax, a polyethylene wax, or a hydrocarbon wax. These may be any of animal wax, vegetable wax, mineral wax, and synthetic wax.

Examples of the cholesterol derivative include cholesteryl isostearate, cholesteryl hydroxystearate, fatty acid cholesteryl ester of macadamia nut, and N-lauric acid-L-glutamic acid II (cholesteryl group 廿2) Keith octyl decyl) ester and the like.

The phytic alcohol derivative may, for example, be N-lauroyl-L-glutamic acid bis (phytosteryl 廿 廿 基 yl -2- octyl decyl) ester, N-lauroyl-L - glutamic acid bis (phytosterol ‧ 2-octyldodetyl) ester, phytyl isostearate phytate and oleic acid oleyl ester.

Examples of the dipentaerythritol fatty acid esters include dinonpentyl hexahydroxystearate and dine pentaerythritol rosinate.

Examples of the triglyceride include glyceryl tris(decyl ‧ sheep wax, myristyl ‧ stearic acid). These triglycerides may also be partially hydrogenated to hardened oil or the like.

Examples of the neurosteroids include natural neural amines and neurosteroids. Examples of the natural neural amide include neurolamine Types 1 to 7 which are subjected to guanidation of ceramide, dihydroneuramin, sphingosine, and dihydrosphingosine. For example, the neurosteroids described in JP-A-2013-53146 can be mentioned.

The higher alcohol may, for example, be a higher alcohol having a carbon number of 12 to 22. Specific examples thereof include myristyl alcohol, cetyl alcohol, stearyl alcohol, and decanediol.

The higher fatty acid may, for example, be a linear fatty acid having 12 to 22 carbon atoms. For example, lauric acid, myristic acid, fatty acid, stearic acid, and sebacic acid can be mentioned.

Among these oils having a solid shape at 20 ° C, from the viewpoint of improving the adhesion of the film, suppressing the adhesion, and enhancing the makeup effect, it is preferably selected from the group consisting of a nervous amine, a higher alcohol, and a higher fatty acid. Kind or more than two.

The content of the oil having a solid shape at 20 ° C in the composition for spraying is preferably 0.01% by mass or more, more preferably 0.05% by mass, from the viewpoint of improving the adhesion of the film, suppressing the adhesion, and improving the makeup effect. More preferably, it is 0.1% by mass or more. Further, it is preferably 15% by mass or less, more preferably 12% by mass or less, still more preferably 10% by mass or less. The content range is preferably 0.01% by mass or more and 15% by mass or less, more preferably 0.05% by mass or more and 12% by mass or less, still more preferably 0.1% by mass or more and 10% by mass or less.

The mass ratio (b/c) of the component (b) to the component (c) in the composition for spraying is preferably 0.5 or more from the viewpoint of improving the adhesion of the film, suppressing the adhesion, and improving the makeup effect. More preferably 2 or more, still more preferably 4 or more, and even more preferably 6 or more. Moreover, from the viewpoint of improving the adhesion of the film, suppressing the adhesion, and improving the makeup effect, it is preferably 700 or less, more preferably 650 or less, still more preferably 120 or less, still more preferably 100 or less. The range containing the mass ratio (b/c) is preferably 0.5 or more and 700 or less, more preferably 2 or more and 650 or less, still more preferably 4 or more and 120 or less, still more preferably 6 or more and 100 or less.

The spray composition may contain only the above component (a), component (b), and component (c), and may contain other components in addition to the component (a), the component (b), and the component (c). Examples of the other component include a plasticizer, a coloring pigment, an extender pigment, a dye, a surfactant, a fragrance, a repellent, an antioxidant, a stabilizer, a preservative, and a polymer having a film forming ability of the component (b). Various vitamins, etc. When the other components are contained in the composition for spraying, 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.

Further, the composition for spraying may contain a glycol. Examples of the glycols include ethylene glycol, propylene glycol, butylene glycol, diethylene glycol, dipropylene glycol, and polypropylene glycol. From the viewpoint of sufficiently evaporating the component (a) in the electrostatic spraying method, the composition for spraying is preferably 10% by mass or less, more preferably 3% by mass or less, still more preferably 1% by mass or less. It is not included in nature.

The present invention is characterized in that the above-mentioned composition for spraying is directly electrostatically sprayed onto the skin.

In the case of performing the electrostatic spray method, the viscosity of the composition for spraying is 25 ° C, preferably 1 mPa ‧ or more, more preferably 10 mPa ‧ s or more, still more preferably 50 mPa ‧ s or more. Further, the viscosity is 25 ° C, preferably 5,000 mPa ‧ s or less, more preferably 2,000 mPa ‧ s or less, still more preferably 1500 mPa ‧ s or less. The viscosity of the composition for spraying is 25 ° C, preferably 1 mPa ‧ or more and 5000 mPa ‧ s or less, more preferably 10 mPa ‧ s or more and 2000 mPa ‧ s or less, still more preferably 50 mPa ‧ s or more and 1500 mPa ‧ s or less. By using a composition for a spray having a viscosity in this range, a porous film, particularly a porous film composed of a deposit of fibers, can be formed uniformly by electrostatic spraying. The formation of the porous film is advantageous from the viewpoints of film adhesion, film transparency, film feeling, and prevention of skin steaming. The viscosity of the composition for spraying was measured at 30 ° C using an E-type viscometer. As the E-type viscometer, for example, an E-type viscometer manufactured by Tokyo Keiki Co., Ltd. can be used. Rotor No. 43 can be used for the rotor at this time.

The composition for spraying is directly sprayed on the target site of human skin by electrostatic spraying. Here, the skin also includes nails. The electrostatic spray method includes a step of electrostatically spraying the composition of the spray onto the skin using an electrostatic spray device. The electrostatic coating apparatus basically includes a container that accommodates the composition, a nozzle that discharges the composition, a supply device that supplies the composition accommodated in the container to the nozzle, and a power source that applies a voltage to the nozzle.

Fig. 1 is a schematic view showing the configuration of an electrostatic coating apparatus suitable for use in the present invention. The electrostatic spray device 10 shown in Fig. 1 is provided with a low voltage power supply 11. The low voltage power source 11 is a voltage that can generate a voltage of several V to ten volts. For the purpose of improving the portability of the electrostatic coating apparatus 10, the low voltage power source 11 is preferably composed of one or two or more batteries. Further, by using a battery as the low-voltage power source 11, there is an advantage that it can be easily replaced as needed. Instead of a battery, an AC adapter or the like can be used as the low voltage power source 11.

The electrostatic spray device 10 is also provided with a high voltage power supply 12. The high-voltage power source 12 is connected to the low-voltage power source 11 and includes a circuit (not shown) that boosts the voltage generated by the low-voltage power source 11 to a high voltage. The booster circuit is generally composed of a transistor, a capacitor, and a semiconductor element.

The electrostatic spray device 10 further includes an auxiliary circuit 13. The auxiliary circuit 13 is interposed between the low voltage power source 11 and the high voltage power source 12, and has a function of adjusting the voltage of the low voltage power source 11 to stabilize the high voltage power source 12. Further, the auxiliary circuit 13 has a function of controlling the number of rotations of the motor provided in the microgear pump 14 to be described later. By controlling the number of rotations of the motor, the supply amount of the composition for the spray of the micro-gear pump 14 by the container 15 by the spray composition described later is controlled. A switch SW is mounted between the auxiliary circuit 13 and the low voltage power source 11, and the electrostatic spraying device 10 can be operated/stopped by switching of the switch SW.

The electrostatic spray device 10 further includes a nozzle 16. The nozzle 16 is made of various conductors such as metal, or a non-conductor such as plastic, rubber, or ceramic, and has a shape in which a spray composition can be discharged from the tip end. A minute space through which the composition for spraying is distributed in the nozzle 16 is formed along the longitudinal direction of the nozzle 16. The size of the cross section of the minute space is preferably 100 μm or more and 1000 μm or less in terms of diameter.

Nozzle 16 is in communication with microgear pump 14 via line 17. The conduit 17 can be an electrical conductor or a non-conducting body. Further, the nozzle 16 is electrically connected to the high voltage power source 12. Thereby, a high voltage can be applied to the nozzle 16. At this time, in order to prevent excessive current from flowing when the nozzle 16 is in direct contact with the human body, the nozzle 16 and the high-voltage power source 12 are electrically connected via the current limiting resistor 19.

The micro-gear pump 14 that communicates with the nozzle 16 via the line 17 has a function as a supply device that supplies the composition for spraying contained in the container 15 to the nozzle 16 . The micro gear pump 14 is operated by receiving a power supply from the low voltage power source 11. Further, the micro gear pump 14 is configured to be supplied to the nozzle 16 by a predetermined amount of the spray composition under the control of the auxiliary circuit 13.

The micro gear pump 14 is connected to the container 15 via a flexible line 18. The container 15 contains a composition for spraying. The container 15 is preferably configured to be in the form of an exchangeable type.

The electrostatic coating apparatus 10 having the above configuration can be used as shown, for example, in FIG. A hand held electrostatic spray device 10 having a size that can be held in one hand is shown in FIG. In the electrostatic coating apparatus 10 shown in Fig. 2, all of the members of the configuration shown in Fig. 1 are housed in a cylindrical casing 20. A nozzle (not shown) is disposed at one end 10a of the longitudinal direction of the casing 20. The nozzle is arranged such that the blowing direction of the composition coincides with the longitudinal direction of the casing 20, and is disposed in the casing 20 so as to be convex toward the skin side. By arranging the tip end of the nozzle toward the skin in the longitudinal direction of the casing 20, the composition for spraying is less likely to adhere to the frame, and the film can be stably formed.

When the electrostatic spraying device 10 is operated, the user, that is, the person who forms the film by electrostatically spraying the target portion on the skin, holds the device 10 by hand, and the device in which the nozzle (not shown) is disposed One end 10a of the 10 faces the application site where electrostatic spraying is performed. Fig. 2 shows a state in which one end 10a of the electrostatic coating apparatus 10 is directed toward the inside of the wrist before the user. In this state, the switch of the apparatus 10 is turned on to perform electrostatic spraying. An electric field is generated between the nozzle and the skin by applying power to the device 10. In the embodiment shown in Fig. 2, a positive high voltage is applied to the nozzle, and the skin becomes a negative electrode. When an electric field is generated between the nozzle and the skin, the composition for spraying at the tip end portion of the nozzle is polarized by electrostatic induction, and the tip end portion thereof is tapered. The droplet of the charged spray composition is separated from the front end of the cone along the electric field and toward the skin. Spit out into the air. When the component (a) which is a solvent is ejected from the composition which is discharged into the space and is charged, the charge density on the surface of the composition for the spray is excessive, and the Coulomb repulsive force is repeatedly finely expanded and spread into the space to reach the skin. At this time, by appropriately adjusting the viscosity of the composition for spraying, the sprayed composition can be brought to the application site depending on the state of the droplet. Alternatively, during the period of being discharged into the space, the volatile matter belonging to the solvent is volatilized from the droplets, and the polymer having the film forming ability belonging to the solute is solidified, and at the same time, the matrix is elongated and deformed by the potential difference to form fibers. This fiber can be deposited on the application site. For example, when the viscosity of the composition for spraying is increased, it is easy to deposit the composition in the form of fibers on the application site. Thereby, a porous film composed of a deposit of fibers is formed on the surface of the application site. The porous film composed of the deposit of the fiber containing the ultraviolet shielding agent can be formed by adjusting the distance between the nozzle and the skin or the voltage applied to the nozzle.

During the electrostatic spraying process, a high potential difference is generated between the nozzle and the skin. However, since the impedance is very large, the current flowing through the human body is extremely small. The present inventors have confirmed that the current flowing through the human body during the electrostatic spraying method is several orders of magnitude smaller than the current flowing through the human body caused by, for example, static electricity generated in normal life.

When the deposit of the fiber containing the ultraviolet shielding agent is formed by the electrostatic spraying method, the thickness of the fiber is preferably 10 nm or more, more preferably 50 nm or more, when it is represented by a circle-equivalent diameter. Further, it is preferably 3,000 nm or less, more preferably 1,000 nm or less. The thickness of the fiber is observed by, for example, scanning electron microscopy (SEM), and the fiber is magnified 10,000 times for observation, and defects (fiber blocks, fiber intersections, droplets) are removed from the two-dimensional image, and 10 fibers are arbitrarily selected. The fibers are drawn perpendicular to the length of the fibers and can be measured by directly reading the fiber diameter.

The film which is a deposit of fibers formed by the electrostatic spray method has a carrier film having a component (c) present on the surface side of the formed fiber. By fiber side, it means a part of the surface or surface and between fibers. The content of the component (c) in the composition for spraying depends on the affinity of the polymer having the film forming ability and the component (c), and when it is about 1% by mass or more, the fibers formed are swollen and soft, and The skin has high followability, and the component (c) is easily oozing out from the constituent fibers, and the component (c) is easily introduced between the fibers and the fibers; on the other hand, the component (c) in the composition for spraying When the content is less than 1% by mass, the component (c) is not easily supported on the surface of the fiber to be formed. When the component (c) is carried on the fiber constituting the film in this manner, the adhesion to the skin is improved, the film adhesion is suppressed, and the makeup effect is enhanced. Moreover, these adhesive effects are further enhanced by the application of the liquid agent described later.

In the case of skin containing sweat or sebum, the fiber (swell) and the plasticity are easily plasticized by compounding the component (c) in the fiber. For example, when the same composition is subjected to electrostatic spraying for 5 seconds on a surface of a metal containing no moisture or oil and a surface of the skin containing water or oil, for example, a palm, if the film diameter is changed over time, Compared with the fibers that are electrostatically sprayed onto the metal surface, the fibers that are electrostatically sprayed onto the surface of the skin become larger in diameter over time due to swelling. Thus, the fiber-containing film formed by electrostatic spraying can be plasticized and softened by the oil and moisture in the skin, the fiber itself has an improved followability to the skin texture, or the component (c) is exuded by the fiber and exists in the fiber. The surface or fiber is between the fibers, so the fiber-containing film is translucent or transparent, giving a natural appearance. When the film formation target is a skin containing sweat or sebum, the fiber diameter due to swelling satisfies the following formula (1).

(electrostatic spraying on the skin, fiber diameter after 30 seconds)> (electrostatic spraying on the metal plate, fiber diameter after 30 seconds). . . (1)

The content of the component (a), the component (b), and the component (c) which are components of the spray is measured as follows. The component (a) which is a volatile substance does not exist in the formed film or volatilizes even if it exists, and therefore the state of the formed film containing only the component (b) and the component (c) is measured. The content was measured as follows.

 <Measurement of the content of component (a), component (b) and component (c) of the composition for spraying >  

There are methods for separation and identification by liquid chromatography (HPLC) depending on the solution state, or identification by infrared spectroscopic spectroscopy (IR). In the liquid chromatography method, since the elution is started from a component having a large molecular weight, the composition can be identified by the prediction of the molecular weight and the elution position of the component. In the case of IR analysis, the functional groups can also be identified by the respective absorbers, and can be identified by comparing the standard maps of the commercially available additives with the IR patterns of the components.

 <Measurement of the content of the component (b) and the component (c) in the formed film >  

The film was dissolved in a solvent, and the film was dissolved in a solvent, and then identified by liquid chromatography (HPLC) or by infrared spectroscopic spectroscopy (IR).

The above-mentioned fibers forming the film are continuous fibers which are infinitely long in the production principle, but preferably have a length of at least 100 times the fiber thickness. In the present specification, a fiber having a length of 100 times or more of the fiber thickness is defined as "continuous fiber". Then, the film produced by the electrostatic spraying method is preferably a porous discontinuous film composed of a deposit of continuous fibers. The film of this form can be handled not only as an aggregate but also as a single sheet, and has a very soft characteristic, and is not easily broken even if a shearing force is applied thereto, and has an advantage of superior followability to the movement of the body. . Furthermore, there is also the advantage that the film is completely removed easily. On the other hand, the continuous film which does not have a fine hole is not easy to peel, and the dispersibility of sweat is very low, and it is easy to generate a steaming. Further, in order to completely remove the film, the porous discontinuous film composed of the aggregate of particles is required to apply friction or the like to the entire film, and it is difficult to completely remove the skin without causing damage to the skin.

In the electrostatic spraying step using the electrostatic spraying device 10, the composition for spraying into a fibrous form by electrostatic spraying causes the component (a) to evaporate, and the component (b) and the component (c) directly reach the skin in a charged state. As described above, since the skin is also charged, the fibers adhere to the skin in the form of a film by electrostatic force. Since fine unevenness such as skin texture is formed on the surface of the skin, the anchoring effect by the unevenness is multiplied, and the fiber is more viscous and adhered to the skin surface in a state of a film. After the electrostatic spraying is thus completed, the power of the electrostatic spraying device 10 is turned off. Thereby, the electric field between the nozzle and the skin disappears, and the surface of the skin is fixed in charge. As a result, the adhesion of the film in the form of one film is more exhibited, and it is less likely to be peeled off from the edge of the film during use, and the durability in use is improved. Moreover, since the fiber constituting the film contains the component (c), the film can be sufficiently adhered to the skin without applying a liquid to the skin. For this reason, it is considered that the component (c) is present in the fiber, and the fiber itself becomes soft due to the plasticizing effect, and the followability to the fine uneven surface is improved, or the component (c) bleeds out to the fiber surface to the fiber and the skin. Caused by liquid cross-linking. Further, since the fibers constituting the film or the surface of the fiber have the coating film containing the component (c), the fibers constituting the film are less likely to reflect light, and the appearance of the film is likely to be transparent, and the appearance can be natural. Cover the skin. These effects are further enhanced by the application of the liquid agent described later.

The distance between the nozzle and the skin also depends on the voltage applied to the nozzle, and is preferably 50 mm or more and 150 mm or less in order to form the film uniformly. The distance between the nozzle and the skin can be measured by a non-contact sensor or the like which is generally used.

The film formed by the electrostatic spraying method preferably has a basis weight of 0.1 g/m ² or more, more preferably 1 g/m ² or more, regardless of whether it is porous or not. Further, it is preferably 50 g/m ² or less, more preferably 40 g/m ² or less. For example, the basis weight of the film is preferably 0.1 g/m ² or more and 50 g/m ² or less, more preferably 1 g/m ² or more and 40 g/m ² or less. By setting the basis weight of the film in this way, the adhesion of the film and the makeup effect can be improved.

Further, the electrostatic spraying step of directly applying the composition to the skin to form a film by electrostatic spraying means a step of directly performing electrostatic spraying on the skin to form a film. The composition is applied to a place other than the skin by electrostatic spraying to form a sheet composed of fibers, and the step of applying the sheet to the skin is different from the above-described electrostatic spraying step.

In the present invention, before or after the electrostatic spraying step of forming a film by electrostatic spraying, a liquid agent containing a liquid selected from the group consisting of a polyol and a liquid at 20 ° C may be used, other than electrostatic spraying. The step of applying to the skin. When the liquid coating step is carried out by a method other than electrostatic spraying, the film formed by the electrostatic spraying step is easily fused to the application site, and the film and the skin can be highly densely viscous and transparent. For example, the step between the end of the film and the skin is less likely to cause a step difference, thereby improving the adhesion between the film and the skin. As a result, peeling or cracking of the film or the like is less likely to occur. In a preferred embodiment, when the coating film is a porous film composed of a deposit of fibers, even if it has a high void ratio, the adhesion to the skin is high, and a large capillary force is likely to occur. Further, when the fibers are fine, the porous film is likely to have a high specific surface area.

In particular, after the step of forming a porous film composed of a deposit of fibers in the electrostatic spraying step, the liquid coating step is performed to form fibers between the fibers of the porous film and/or the surface of the fiber. A film in which the liquid agent is present is formed. Thereby, the adhesion of the film is improved, and the transparency of the film during visual observation is maintained or improved. Especially in the case where the film is colorless or transparent or colored, since the film is less easily recognized, it can be rendered like a natural skin. Further, in the case where the film is colored and transparent, since the film has a transparent feeling, it can be formed as one part of the skin.

Examples of the oil which is liquid at 20 ° C include linear or branched hydrocarbon oils such as flowing paraffin, light isoparaffin, flowing isoalkane, squalane, and squalene; vegetable oils such as jojoba oil and olive oil; An ester oil such as animal oil such as liquid lanolin, a monool fatty acid ester or a polyhydric alcohol fatty acid ester; dimethyl polyoxane, dimethylcyclopolyoxyalkylene, methylphenyl polyoxyalkylene, A polyoxyphthalic acid such as methylhydrogenpolysiloxane or a higher alcohol modified organic polyoxyalkylene. Among these, from the viewpoint of the feeling of use such as the smoothness at the time of application, it is preferably a hydrocarbon oil, an ester oil, a vegetable oil containing a triglyceride or the like, or a polar oil such as a polyoxygenated oil. Preferred are hydrocarbon oils, ester oils and triglycerides. Further, one type of the liquid oils selected from these may be used alone or two or more types may be used in combination.

The hydrocarbon oil may, for example, be a liquid paraffin, squalane, squalene, n-octane, n-heptane, cyclohexane, a light isoparaffin or a flowing isoalkane, and is preferably selected from the viewpoint of use. One or two or more types of paraffin and squalane. Further, from the viewpoint that the electrostatically sprayed film can be adhered to the skin, the viscosity of the hydrocarbon oil at 30 ° C is preferably 10 mPa ‧ or more, more preferably 30 mPa ‧ s or more. From this point of view, the total content of isododecane, isohexadecane, and hydrogenated polyisobutylene in the liquid at a viscosity of less than 10 mPa·s at 30 ° C is preferably 10% by mass or less, more preferably 5% by mass. In the following, it is more preferably 1% by mass or less, still more preferably 0.5% by mass or less, and may not be contained.

Similarly, from the viewpoint that the electrostatically sprayed film can be adhered to the skin, the viscosity of the ester oil and the polyoxygenated oil at 30 ° C is preferably 10 mPa ‧ or more, more preferably 30 mPa ‧ s or more.

Here, the viscosity was measured at 30 ° C using a BM-type viscometer (manufactured by TOKIMEC Co., Ltd., measurement conditions: rotor No. 1, 60 rpm, 1 minute).

Further, from the same viewpoint, the total content of the ether oil such as cetyl-1,3-dimethylbutyl ether, dioctyl ether, dilauryl ether or diisostearyl ether in the liquid agent is preferably 10% by mass or less, more preferably 5% by mass or less, still more preferably 1% by mass or less.

Further, as the liquid oil, a polar oil which is liquid at 20 ° C may be suitably used, and examples thereof include ester oils, vegetable oils containing triglycerides (triglycerides), branched fatty acids or higher alcohols of unsaturated fatty acids. , preservatives, polyoxygenated oils, etc. These liquid oils may be used alone or in combination of two or more.

The ester oil may, for example, be an ester composed of a linear or branched fatty acid or a linear or branched alcohol or a polyhydric alcohol. Specific examples thereof include isopropyl myristate, cetyl octanoate, octyldodecyl myristate, isopropyl palmitate, butyl stearate, hexyl laurate, myristyl myristate, Oxalic acid oleate, hexyl decyl dimethyl octanoate, cetyl lactic acid, myristyl lactate, lanolin acetate, isocetyl stearate, isocetyl isostearate, 12-hydroxystearyl Acid cholesterol ester, di(2-ethylhexanoic acid) ethylene glycol ester, dipentaerythritol fatty acid ester, monoisostearic acid-N-alkyl glycol ester, neopentyl glycol dicaprate, malic acid diiso Stearyl ester, bis(2-heptylundecanoic acid) glyceride, trimethylolpropane tris(2-ethylhexanoate), trimethylolpropane triisostearate, tetra (2- Ethylhexanoic acid) pentaerythritol ester, tris(2-ethylhexanoate) glyceride, trimethylolpropane triisostearate, cetyl 2-ethylhexanoate, palmitic acid-2-ethylhexyl Ester, diethylhexyl naphthalate, benzoic acid (C12-12) alkyl, cetyl stearyl phthalate, tris(octanoic acid) glyceride, (dioctanoic acid/capric acid) ) butyl diester, glyceryl trilaurate, glyceryl trimyristate , tripalmitin, triisostearate, tris(2-heptylundecanoate) glyceride, tristearic acid glyceride, tricocohol fatty acid glyceride, castor oil fatty acid methyl ester, oil Acid oil ester, palmitic acid 2-heptyl lauryl ester, diisobutyl adipate, N-lauryl-L-glutamic acid-2-octyldodecyl ester, adipic acid di(2) -heptyl lauryl ester), ethyl laurate, di(2-ethylhexyl) sebacate, 2-hexyldecyl myristate, 2-hexyldecyl palmitate, adipate-2- Hexyl decyl ester, diisopropyl sebacate, di-2-ethylhexyl succinate, triethyl citrate, 2-ethylhexyl p-methoxycinnamate, bis(trimethylacetic acid) Tripropylene diester and the like.

Among these, from the viewpoint of allowing the electrostatically sprayed film to adhere to the skin and the feeling of being applied to the skin, it is preferably selected from octyl dodecyl myristate. Myristate myristate, isocetyl stearate, isocetyl isostearate, cetearyl isodecanoate, diisobutyl adipate, di(2-ethyl) sebacate Hexyl ester), isopropyl myristate, isopropyl palmitate, diisostearyl malate, neopentyl glycol dicaprate, benzoic acid (C12-12) alkyl, tris(octanoate) ‧1 or 2 or more of glycerides, more preferably selected from the group consisting of isopropyl myristate, isopropyl palmitate, diisostearyl malate, neopentyl glycol dicaprate, benzene One or more of formic acid (carbon number 12-15) alkyl ester and tris(octanoic acid) acid glyceride, more preferably selected from neopentyl glycol dicaprate, benzoic acid (carbon number 12) ~15) One or more of an alkyl ester and a tris(octanoic acid/capric acid) glyceride.

Preferred as the triglyceride is a fatty acid triglyceride, including, for example, olive oil, jojoba oil, macadamia oil, white mulberry oil, castor oil, safflower oil, sunflower oil, avocado oil, canola oil , almond oil, rice germ oil, rice bran oil, and the like.

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

Examples of the preservative include phenoxyethanol, methyl paraben, ethyl p-aminobenzoate, isobutyl p-oxybenzoate, isopropyl p-oxybenzoate, ethyl p-oxybenzoate, and the like. Butyl oxybenzoate, propyl paraoxybenzoate, benzyl p-oxybenzoate, ethyl hexanediol, and the like.

Examples of the polyoxygenated oil include dimethyl polyoxyalkylene oxide, dimethylcyclopolyoxyalkylene oxide, methylphenyl polyoxyalkylene oxide, methyl hydrogen polyoxyalkylene oxide, and higher alcohol modified organic polyoxygen. Alkane, etc.

The dynamic viscosity of the polyoxygenated oil at 25 ° C is preferably 3 mm ² /s, more preferably 4 mm ² /s, and even more preferably 5 mm ² from the viewpoint of adhering the electrostatically sprayed film to the skin. Above /s, and preferably 30 mm ² /s or less, more preferably 20 mm ² /s or less, still more preferably 10 mm ² /s or less.

Among these, dimethylpolysiloxane is preferably contained from the viewpoint of adhering the electrostatically sprayed film to the skin.

The liquid oil content in the liquid preparation is preferably 0.1% by mass or more, more preferably 0.5% by mass or more, still more preferably 5% by mass or more. Further, it is preferably 100% by mass or less. The liquid oil content in the liquid agent 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.

Further, the liquid preparation may further contain a polyhydric alcohol. In the case of containing a polyhydric alcohol, examples of the polyhydric alcohol include alkyl glycols such as ethylene glycol, propylene glycol, 1,3-propanediol, and 1,3-butylene glycol; diethylene glycol, dipropylene glycol, and poly A polyalkylene glycol such as ethylene glycol or polypropylene glycol; or a glycerin such as glycerin, diglycerin or triglycerin. Among these, from the viewpoint of smoothness at the time of application and feeling of use, it is preferably selected from the group consisting of ethylene glycol, propylene glycol, 1,3-butylene glycol, dipropylene glycol, polyethylene glycol, glycerin, and diglycerin. One type or two or more types are more preferably propylene glycol, 1,3-butylene glycol, or glycerin, and still more preferably one or two types selected from the group consisting of propylene glycol and 1,3-butylene glycol.

The liquid agent preferably has a viscosity of about 5000 mPa·s at 25 ° C from the viewpoint of improving the adhesion between the film formed by the electrostatic spray method and the application site. The viscosity measurement method of the liquid is as described above.

When a liquid preparation containing a polyol or a liquid oil is applied to the skin, various methods other than the electrostatic spray method can be used. For example, a thin layer of the liquid preparation can be formed by applying a liquid agent to the skin by dripping, squeezing, or the like, and spreading the liquid agent to a skin or a film. The step of spreading the liquid agent can be carried out, for example, by the user's own finger or by using an applicator or the like. Alternatively, the liquid agent may be dripped or smeared, but by having a step of spreading the coating, it can be fused to the skin or the film to sufficiently improve the adhesion of the film. As another method, the liquid agent is sprayed toward the skin, and a thin layer of the liquid agent may be formed. At this time, it is not particularly necessary to perform the coating expansion separately, but it is also possible to perform the coating expansion after the spraying. Further, when the liquid preparation is applied after the formation of the film, the excess liquid agent can be removed by applying a sufficient liquid agent to the skin by the step of bringing the sheet into contact with the liquid application range.

The amount of the liquid agent applied to the skin by a method other than electrostatic spraying may be sufficient to increase the adhesion between the skin and the film. In the case where the liquid preparation contains a liquid oil, the amount of the liquid agent applied to the skin is preferably based on the basis weight of the liquid oil from the viewpoint of making the adhesion between the skin and the film more reliable. The amount is 0.1 g/m ² or more, more preferably 0.2 g/m ² or more, and is preferably 40 g/m ² or less, more preferably 35 g/m ² or less. For example, the amount of the liquid agent applied to the skin is preferably 0.1 g/m ² or more and 40 g/m ² or less, more preferably 0.2 g/m ² or more and 35 g/m, based on the basis weight of the liquid oil. ² or less.

Further, the amount of the liquid agent applied to the skin or the film is preferably 5 g/m ² or more, more preferably 10 g from the viewpoint of improving the adhesion between the skin and the film, and from the viewpoint of improving the transparency. / m ² or more, still more preferably 15g / m ² or more, and preferably based 50g / m ² or less, more preferably 45g / m ² or less.

The method for producing a film of the present invention as described above can be used as various cosmetic methods for the purpose of not being subjected to human surgery, treatment or diagnostic methods.

The present invention has been described above based on preferred embodiments, but the present invention is not limited to the above embodiments. For example, in the above embodiment, the electrostatic spraying device 10 is held by a person who wants to form a film on his or her own skin, and an electric field is generated between the conductive nozzle of the device 10 and the skin of the device, but it is generated between the two. Before the electric field is lifted, it is not necessary to hold the electrostatic spraying device 10 by a person who wants to form a film on his own skin.

In the above embodiment, the present invention further discloses the following method for producing a film.

<1> A method for producing a film, characterized in that a composition containing the component (a), the component (b), and the component (c) is directly electrostatically sprayed onto the skin.

(a) one or more volatile substances selected from the group consisting of water, alcohols, and ketones; (b) a polymer having a film forming ability; and (c) an oil having a solid shape at 20 °C.

<2> The method for producing a film according to <1>, further comprising applying a liquid agent containing a component selected from the group consisting of a polyol and a liquid which is liquid at 20 ° C to the skin before or after the electrostatic spraying step A step of.

<3> The method for producing a film according to <1> or <2>, wherein the component (c) is selected from the group consisting of a wax, a cholesterol derivative, a phytol derivative, and a dipentaerythritol fatty acid ester. At least one of triglycerides, lanolin, lanosterol derivatives, petrolatum, nervous amines, higher alcohols, and higher fatty acids.

(4) The method of producing a film according to any one of the above aspects, wherein the electrostatic spray coating is provided in a container having a container for accommodating the composition and discharging the composition; The composition is supplied to a supply device of the nozzle and an electrostatic spray device that supplies a voltage to the nozzle.

The method for producing a film according to any one of the above-mentioned items, wherein the vapor pressure of the volatile substance of the component (a) is preferably 0.01 kPa or more at 20 ° C. 106.66 kPa or less, more preferably 0.13 kPa or more and 66.66 kPa or less, still more preferably 0.67 kPa or more and 40.00 kPa or less, still more preferably 1.33 kPa or more and 40.00 kPa or less.

The method for producing a film according to any one of the above-mentioned items, wherein the volatile matter of the component (a) is an alcohol, and the alcohol is preferably selected from the chain of a monohydric alcohol. One or more of an aliphatic alcohol, a monocyclic aliphatic alcohol, or a monohydric aromatic alcohol; more preferably, the alcohol is selected from the group consisting of ethanol, isopropanol, butanol, and phenylethyl alcohol. One or two or more kinds of propanol or pentanol.

The method for producing a film according to any one of the above aspects, wherein the volatile matter of the component (a) is one selected from the group consisting of ethanol, isopropanol, butanol, and water. Further, two or more kinds thereof are more preferably one or more selected from the group consisting of ethanol and butanol, and more preferably a volatile substance containing at least ethanol.

The method for producing a film according to any one of the above aspects, wherein the content of the component (a) in the composition is preferably 50% by mass or more, more preferably 55% by mass. More preferably, it is 60% by mass or more, more preferably 98% by mass or less, more preferably 96% by mass or less, still more preferably 94% by mass or less; and the content of the component (a) in the above composition is preferably 50% by mass. % or more and 98% by mass or less, more preferably 55% by mass or more and 96% by mass or less, still more preferably 60% by mass or more and 94% by mass or less.

The method for producing a film according to any one of the above aspects, wherein the component (b) is, for example, polytriglucose, hyaluronic acid, chondroitin sulfate, poly-γ-glutamic acid, Mucopolysaccharide of corn starch, β-glucan, grape oligosaccharide, heparin, keratan sulfate, cellulose, pectin, wood glue, lignin, glucomannan, galacturonic acid, flax-purple Seed gum, tamarind gum, gum arabic, tragagan gum, soy water-soluble polysaccharide, alginic acid, carrageenan, laminaria, cold days (cabbage), fucoidan, methylcellulose, hydroxypropyl A natural polymer such as cellulose or hydroxypropylmethylcellulose, partially alkalized polyvinyl alcohol (in the case where a crosslinking agent is not used), low alkalinized polyvinyl alcohol, polyvinylpyrrolidone (PVP), and poly A synthetic polymer such as ethylene oxide or sodium polyacrylate. These water-soluble polymers may be used alone or in combination of two or more, preferably selected from the group consisting of polytriglucose, and partially alkalized polyvinyl alcohol, low alkalinized polyvinyl alcohol, polyvinylpyrrolidone, and polyethylene oxide. One or two or more.

The method for producing a film according to any one of the above aspects, wherein the component (b) is selected from the group consisting of fully alkalized polyvinyl alcohol which can be insolubilized after the film is formed, and Partially alkalized polyvinyl alcohol, poly(N-propionyl extended ethyl imine) graft-dimethyloxane/γ-amine which can be cross-linked after being formed into a film together with a crosslinking agent Propyl propyl methoxide copolymer, etc. Oxazoline modified polyfluorene oxide, polyvinyl acetal diethylaminoacetate, zein (main component of corn protein), polyester, polylactic acid (PLA), polyacrylonitrile resin, polymethyl Acrylic resin such as acrylic resin, polystyrene resin, polyvinyl butyral resin, polyethylene terephthalate resin, polybutylene terephthalate resin, polyurethane resin, polyfluorene One or two or more kinds of water-insoluble polymers of an amine resin, a polyimide resin, and a polyamidoximine resin; more preferably, it is selected from fully alkalized polyvinyl alcohol which can be insolubilized after formation of a film. a partially alkalized polyvinyl alcohol, a polyvinyl butyral resin, a polyurethane resin, a poly(N-propionyl group) which can be crosslinked after being formed into a film by a combination with a crosslinking agent. Ethylimine) graft-dimethyloxane/γ-aminopropylmethyloxane copolymer, etc. An oxazoline-modified polyfluorene oxide, a polyvinyl acetal diethylaminoacetate, or one or more water-insoluble polymers of zein; more preferably, a polyvinyl butyral resin and One or two or more kinds of water-insoluble polymers of a polyurethane resin.

The method for producing a film according to any one of the above aspects, wherein the content of the component (b) in the composition is preferably 2% by mass or more, more preferably 4% by mass. More preferably, it is more preferably 6% by mass or more, further preferably 50% by mass or less, more preferably 45% by mass or less, still more preferably 40% by mass or less, and the content of the component (b) in the above composition is preferably 2% by mass. % or more and 50% by mass or less, more preferably 4% by mass or more and 45% by mass or less, still more preferably 6% by mass or more and 40% by mass or less.

The method of producing a film according to any one of the above-mentioned items, wherein the content of the component (c) in the composition is preferably 0.01% by mass or more, more preferably 0.05% by mass or more. Further, it is more preferably 0.1% by mass or more, still more preferably 15% by mass or less, still more preferably 12% by mass or less, still more preferably 10% by mass or less.

The method for producing a film according to any one of the above aspects, wherein the component (b) and the component (c) in the composition are preferably contained in a mass ratio (b/c). It is 0.5 or more and 150 or less, more preferably 1 or more and 130 or less, still more preferably 1.2 or more and 120 or less.

The method for producing a film according to any one of the above aspects, wherein the electrostatic spray device is provided with an electrostatic spray method; the electrostatic spray device includes a nozzle; and the nozzle is made of metal. Each of the conductors, or a non-conductor such as a plastic, a rubber or a ceramic, is formed into a shape from which the composition can be discharged from the tip end.

The method for producing a film according to any one of the above aspects, wherein the electrostatic spray device is provided with an electrostatic spray method, and the electrostatic spray device includes a nozzle and a frame; The nozzle is disposed at one end of the longitudinal direction, and the nozzle is disposed such that the blowing direction of the composition coincides with the longitudinal direction of the frame and is convex toward the skin side.

The method for producing a film according to any one of the above aspects, wherein the composition to be sprayed is such that a volatile substance belonging to a solvent evaporates from the droplet, and the substance belongs to the solute. The polymer of the film forming ability is solidified while being elongated and deformed by a potential difference to form fibers.

The method for producing a film according to any one of the above-mentioned items, wherein the electrostatic spraying device is provided with an electrostatic spray method; the electrostatic spraying device includes a nozzle; and the distance between the nozzle and the skin is set. It is 50 mm or more and 150 mm or less.

The method for producing a film according to any one of the above-mentioned items, wherein the basis weight of the film formed by the electrostatic spraying method is preferably 0.1 g/m ² or more, more preferably 1 g/ m ² or more; further preferably 30 g/m ² or less, more preferably 20 g/m ² or less; the basis weight of the film is preferably 0.1 g/m ² or more and 30 g/m ² or less, more preferably 1 g/m ² The above is 20 g/m ² or less.

<19> The method for producing a film according to any one of <1> to <18>, wherein a content ratio ((a)/(b)) of the component (a) to the component (b) is 0.5 or more and 40 or less. It is preferably 1 or more and 30 or less, more preferably 2 or more and 25 or less.

The method for producing a film according to any one of <7> to <18> wherein the content ratio ((a)/(b)) of the ethanol (a) to the component (b) is 0.5 or more and 40 Hereinafter, it is preferably 1 or more and 30 or less, more preferably 2 or more and 25 or less.

The method for producing a film according to any one of the above aspects, wherein the composition further contains 10% by mass or less of a glycol.

The method for producing a film according to any one of <1> to <21> wherein the component (a) is a volatile substance containing at least ethanol, and the component (b) is selected from the group consisting of polyvinyl butyral. One or two or more kinds of a resin and a urethane resin.

The method for producing a film according to any one of the above aspects, wherein the component (a) is a volatile substance containing at least ethanol and further contains 10% by mass or less of a glycol.

The method for producing a film according to any one of <1> to <23> wherein the component (a) is a volatile substance containing at least ethanol, and the content of the alcohol in the volatile substance is 50% by mass or more. 100% by mass or less and containing 10% by mass or less of glycols.

The method of producing a film according to any one of the above aspects, wherein the component (a) is contained in the composition in an amount of 30% by mass or more and 98% by mass or less, and the component (b) The content of the component (c) is 0.001% by mass or more and 50% by mass or less, based on the composition for the spray, of 2% by mass or more and 50% by mass or less.

The method of producing a film according to any one of the above aspects, wherein the content of the component (a) is 55 mass% or more and 96 mass% or less in the composition, and the component (b) The content of the component (c) is from 0.01% by mass to 30% by mass in the composition for spray. The content of the component (c) is from 0.01% by mass to 30% by mass.

The method of producing a film according to any one of the above aspects, wherein the component (a) is contained in the composition in an amount of 60% by mass or more and 94% by mass or less, and the component (b) The content of the component (c) is 0.1% by mass or more and 15% by mass or less based on the composition for the spray.

The method for producing a film according to any one of <1> to <27> wherein the component (a) is a volatile substance containing at least ethanol, and the component (b) is selected from the group consisting of polyvinyl butyral. One or two or more kinds of a resin and a urethane resin.

The method for producing a film according to any one of the above aspects, wherein the component (a) is a volatile substance containing at least ethanol, and further contains 10% by mass or less of a glycol.

The method for producing a film according to any one of the above aspects, wherein the component (a) is a volatile substance containing at least ethanol, and the content of the alcohol in the volatile substance is 50% by mass or more. 100% by mass or less and containing 10% by mass or less of glycols.

 [Examples]  

Hereinafter, the present invention will be described in more detail by way of examples. However, the scope of the invention is not limited to the embodiments. Unless otherwise specified, "%" means "% by mass".

 [Example 1]    (1) Modulation of the composition for spraying  

As a component (a) of the composition for the spray, ethanol (manufactured by Wako Pure Chemical Industries, Ltd.: trade name: ethanol (99.5)) was used. As component (b) of the composition for spraying, polyvinyl butyral (manufactured by Sekisui Chemical Co., Ltd.: trade name: S-LEC B BM-1) was used. As the component (c) of the composition for spraying, cetyl alcohol (manufactured by Advanced Alcohol Industrial Co., Ltd.: trade name: CETANOL NX) was used. The blending ratio in the spray composition is shown in Table 1. Further, the amount of ethanol shown in Table 1 is an effective amount without water.

 (2) Liquid application steps  

(2-1) A film was formed in the same manner as in Example 1 except that the oil agent was applied before the electrostatic spraying step. As an oil agent, ESTEMOL N-01 manufactured by Nissin OilliO Co., Ltd. was used.

(2-2) Apply the emulsion before the electrostatic spraying step. As the emulsion, ALBLANC MEDICATED EMULSION IV (made by Kao) was used.

 (3) Electrostatic spraying step  

Using the electrostatic coating apparatus 10 having the configuration shown in Fig. 1 and having the appearance shown in Fig. 2, the electrostatic spraying method was directly applied to the skin for 20 seconds. The conditions of the electrostatic spray method are as follows.

‧Applied voltage: 10kV

‧The distance between the nozzle and the skin: 100mm

‧ Discharge of spray composition: 5mL / h

‧Environment: 25 ° C, 30% RH

By this electrostatic spraying, a film of a film form composed of a deposit of fibers is formed on the surface of the skin. The film is a circle having a diameter of about 4 cm and a mass of about 3.8 mg. The fiber thickness measured by the above method was 660 nm.

 [Example 2 to Example 14]  

Except that the components (a), (b), and (c) of the composition for spraying were changed to the conditions shown in the following Table 4, the same procedure as in Example 1 was carried out, and an electrostatic spraying step was carried out to obtain a deposit composed of fibers. The film.

 [Comparative Example 1 to Comparative Example 3]  

The composition of Table 1 and the liquid agent were applied to the skin by fingers without electrostatic spraying. .

 [Evaluation]  

With respect to the film formed in the examples and the comparative examples, the adhesion to the skin and the appearance of the film were evaluated according to the following criteria. The results are shown in Table 2.

 <The adhesion to the skin>  

1: The film was almost completely peeled off immediately after the electrostatic spraying in the electrostatic spraying step.

2: Although the film adhered immediately after the electrostatic spraying in the electrostatic spraying step, after 30 minutes in the static state, 50% or more of the film area was peeled off.

3: Although the film adhered immediately after the electrostatic spraying in the electrostatic spraying step, after 30 minutes in the static state, the film area was peeled off by less than 50%.

4: After the electrostatic spraying in the electrostatic spraying step, the film adhered to the stationary state for 30 minutes, but peeled off when the shearing force was caused by the fingers in the parallel direction.

5: After the electrostatic spraying in the electrostatic spraying step, the film adhered at a standstill for 30 minutes, even if the shearing force was caused by the fingers in the parallel direction.

 <Evaluation of sticky feeling>  

The following evaluation was performed immediately after the film formation. A mask was formed on the inside of the front wrist by a specialized functional examiner, and the finger was slid at 100 g/cm ² on the formed film to evaluate the adhesive feeling. The evaluation of the adhesiveness was evaluated as "5" in the case where the film was completely viscous, and the most satisfactory feeling was used, and the evaluation of the film viscosity and the feeling of use was evaluated as "1", and the evaluation was carried out in five stages. The evaluation results are expressed as the average of the evaluation results of the three specialized examiners.

 <The makeup feeling of powder cake>  

After the film formation, the powder cake was used for evaluation. A film was formed on the inside of the front wrist by a specialized functional examiner, and the powder was applied to the formed film by a powder puff at 100 g/cm ^{2 to} evaluate the adhesion. The evaluation of the adhesion of the foundation was evaluated as "5" when the film was completely and uniformly adhered, and the feeling of use was the best, and the unevenness of the foundation was evaluated, and the person who was inferior in use was evaluated as "1", and the evaluation was carried out in five stages. The evaluation results are expressed as the average of the evaluation results of the three specialized examiners.

As can be seen from the results of Table 2, the film formed by the method of each of the examples had a high adhesion to the skin and a small adhesiveness, and the usability was good as compared with the film formed by the method of the comparative example. Furthermore, the film is completely and uniformly adhered to the powder, and the makeup effect is good. The effect of improving the usability of the film of the method of the present invention is not limited to the fact that the preparation film is simply present on the skin, but is uniformly distributed on the film and uniformly present on the skin.

Claims (16)

 A method for producing a film on a skin, characterized in that a composition containing the component (a), the component (b) and the component (c) is directly electrostatically sprayed onto the skin; (a) is selected from the group consisting of water, alcohols and One or more volatile substances of ketones; (b) a polymer having a film forming ability; and (c) an oil having a solid shape at 20 °C.    The method for producing a film according to claim 1, wherein the liquid preparation containing one or more liquids selected from the group consisting of a polyol and a liquid which is liquid at 20 ° C is electrostatically sprayed before or after the electrostatic spraying step. The method of applying to the skin.    The method for producing a film according to claim 1, wherein the component (c) is selected from the group consisting of waxes, cholesterol derivatives, phytol derivatives, dipentaerythritol fatty acid esters, triglycerides, and wool. At least one of a fat, a lanosterol derivative, a petrolatum, a nervous amine, a higher alcohol, and a higher fatty acid.    The method of producing a film according to claim 1, wherein the electrostatic spraying system uses a container that houses the composition, a nozzle that discharges the composition, and a supply device that supplies the composition contained in the container to the nozzle. And an electrostatic spraying device that supplies a voltage to the nozzle.    The method for producing a film according to claim 1, wherein the component (a) is at least one selected from the group consisting of ethanol, isopropyl alcohol, butanol, and water.    The method for producing a film according to claim 1, wherein the component (a) is a volatile substance containing at least ethanol.    The method for producing a film according to claim 1, wherein the component (a) is a volatile substance containing at least ethanol, and the content of the alcohol in the volatile substance is 50% by mass or more and 100% by mass or less.    The method for producing a film according to claim 1, wherein the content of the component (a) is 30% by mass or more and 98% by mass or less based on the composition.   The method for producing a film according to claim 1, wherein the component (b) is selected from the group consisting of fully alkalized or partially alkalized polyvinyl alcohol, polyvinyl butyral resin, polyurethane resin, One or more of oxazoline-modified polyfluorene oxide, water-soluble polyester, and zein.  The method of producing a film according to claim 1, wherein the component (b) is one or more selected from the group consisting of a polyvinyl butyral resin and a polyurethane resin.    The method of producing a film according to claim 1, wherein the content of the component (b) is 2% by mass or more and 50% by mass or less based on the composition for spraying.    The method for producing a film according to claim 1, wherein the content ratio ((a)/(b)) of the component (a) to the component (b) is 0.5 or more and 40 or less.    The method for producing a film according to claim 6, wherein the content ratio ((a)/(b)) of the ethanol (a) to the component (b) is 0.5 or more and 40 or less.    The method for producing a film according to claim 1, wherein the content of the component (c) is 0.01% by mass or more and 15% by mass or less based on the composition.    The method for producing a film according to claim 1, wherein the content ratio ((b)/(c)) of the component (b) to the component (c) is 0.5 or more and 50 or less.    The method for producing a film according to claim 1, wherein the content of the glycol in the composition is 10% by mass or less.