JP6164276B2 - Nail polish - Google Patents

Description

  The present invention relates to a nail polish that can be applied to perform a capacitive touch panel operation with a toe.

Manicure is widely used among women as a cosmetic for decorative purposes. In addition, some nail varnishes are called base coats for preventing nail cracking and maintaining nail health, and such nail varnishes are widely used not only by women but also by male athletes. In addition, there are nail colors for flashing colors and drawing designs, top coats for protecting the surface of nails coated with nail colors, etc., which are properly used depending on the application.
Recently, various types of nail polish such as those mixed with not only color but also pearl and lame, those with excellent quick-drying properties, and those that can be removed by peeling have been sold (see Patent Documents 1 and 2). More and more women are decorating their nails with nail polish. In addition, with the manicure decoration, the number of women who extend their nails longer is increasing.

  By the way, in recent years, touch panels that can be operated by touching a screen are used for mobile phones and smart phones, ATMs of banks and financial institutions, automatic vending machines (automatic vending machines), etc. A touch panel operates by detecting voltage, ultrasonic waves, light, and the like, and its principle varies. Specifically, there are touch panels such as a resistance film method, a capacitance method, an ultrasonic method, an optical method, and an electromagnetic induction method. Of these, the capacitive touch panel operates by recognizing the position by detecting the capacitance change of the charge on the surface of the touch panel caused by touching the screen.

The capacitive touch panel has two types of detection methods, a surface type and a projection type, each having a different structure.
Hereinafter, description will be given with reference to the drawings.

FIG. 1 is a schematic perspective view showing an example of a general projected capacitive touch panel.
The projected capacitive touch panel 1 has a transparent substrate 2 and a transparent electrode layer 3 disposed on the transparent substrate 2, and a protective cover 4 on the transparent electrode layer 3. Yes. The transparent electrode layer 3 constituting the projected capacitive touch panel 1 is composed of a first transparent electrode layer 31 and a second transparent electrode layer 32.

FIG. 2 is a schematic plan view showing an example of a transparent electrode layer constituting a general projected capacitive touch panel. The transparent electrode layer 3 comprises the first transparent electrode layer 31 and the second transparent electrode layer 32 as described above, and the first transparent electrode layer 31 detects coordinates in the X direction. A plurality of transparent electrodes 31X are formed in the X direction, and a plurality of transparent electrodes 32Y for detecting coordinates in the Y direction are separated in the Y direction on the second transparent electrode layer 32. Formed. The reason why the plurality of transparent electrodes are formed separately is to improve the accuracy of position detection. In addition, although each transparent electrode shown in FIG. 2 is a rhombus electrode, there are other fields such as a tabular electrode.
The transparent electrode 31X and the transparent electrode 32Y formed in the X direction or the Y direction are connected to the X coordinate detection conductive portion 5X and the Y coordinate detection conductive portion 5Y, respectively, and the X coordinate detection conductive portion 5X. Although not shown, the Y coordinate detection conductive portion 5Y is connected to a switching circuit, a detection circuit, and the like. The X coordinate detection conductive portion 5X and the Y coordinate detection conductive portion 5Y function as electrodes for applying a predetermined voltage to the transparent electrode 31X and the transparent electrode 32Y, respectively. A voltage can be selectively applied to either 31X or the transparent electrode 32Y.

FIG. 3 is a schematic diagram illustrating an example of the operating principle of a projected capacitive touch panel.
As described above, an electric field is formed on the surface of the transparent electrode layer 3 to which a voltage is applied, and when the finger 100 approaches the projected capacitive touch panel in this state, a gap between the finger 100 and the transparent electrode is obtained. The capacitance increases. By detecting which position of the X-coordinate conductive portion and the Y-coordinate conductive portion has increased capacitance, the coordinates of the contact position can be obtained.

  The projected capacitive touch panel can detect multiple points from its detection method. Therefore, it is currently used in a wide range of fields.

  Next, FIG. 4 is a schematic perspective view showing an example of a general surface-type capacitive touch panel. The surface-type capacitive touch panel 1 has a transparent substrate 2, a transparent conductive film 6 disposed on the transparent substrate 2, and a protective cover 4 disposed on the transparent conductive film 6.

  FIG. 5 is a schematic plan view showing an example of a transparent conductive film constituting a general surface-type capacitive touch panel. The transparent conductive film 6 has electrodes 61 at four corners, and an electric field is formed on the surface of the transparent conductive film 6 by these electrodes.

FIG. 6 is a schematic diagram illustrating an example of the operating principle of a surface capacitive touch panel.
As shown in FIG. 6, when the finger 100 contacts the surface capacitive touch panel 1, a weak current flows through the finger 100 from the electrodes at the four corners. At this time, since the amount of current increases as the electrode is closer to the position touched by the finger 100, the position touched by the finger 100 can be detected by calculating the ratio of the amount of current flowing from the four corners.
In addition, about the code | symbol which is not demonstrated, since it can be the same as that of FIG. 4, it abbreviate | omits.

  In this way, the capacitive touch panel operates by changing the capacitance, etc., unlike the resistive touch panel that operates by pushing the screen, so it operates lightly just by approaching or touching the screen. be able to. As a result, it is possible to perform an operation of tracing the screen and turning the page, and an operation of inputting a key by hitting the screen. At present, a capacitive touch panel is employed in a mobile phone, a smartphone, a portable information terminal, and the like. In addition, the capacitance type touch panel has a higher transmittance than the resistive film type, so the screen is clear. Furthermore, since the capacitive touch panel can be provided with a protective cover such as glass on the surface, it is resistant to scratches and has excellent durability and environmental resistance.

  However, while the number of women who stretch their nails is increasing with the decoration of the nails, it becomes difficult to approach or touch the touch panel with a finger, and there is a problem that the capacitive touch panel cannot be operated. The capacitive touch panel does not react to anything other than the finger. The capacitive touch panel assumes that the human body is the ground, and when the finger approaches the capacitive touch panel, the transparent electrode or This is because the capacitance on the surface of the transparent conductive film changes, and the position where the finger approaches or comes in contact with the change in the capacitance is detected to operate. In other words, a capacitive touch panel can be operated with a finger or an electrostatic conductivity equivalent to that of a finger.

  As a method of solving such a problem, there is a method of operating using a tool such as a dedicated stylus pen instead of a finger (see Patent Document 3), but the stylus pen is used together with a mobile phone, a smartphone, a portable information terminal, and the like. There is a problem that it is necessary to carry around and that it is difficult to operate with one hand. Therefore, a further solution is demanded.

  As described above, even if it is difficult to operate the capacitive touch panel with decorations such as nail polish and mounted on mobile phones, smartphones, personal digital assistants, etc., the capacitive touch panel Development of a method that can be easily operated without using a dedicated tool is required.

  Furthermore, at present, there are many miniaturized capacitive touch panels, and the input buttons are often small accordingly. Therefore, there are problems such as erroneous input and erroneous operation when inputting with a finger, and development of a method that can be accurately operated with a toe is required.

JP 2002-326911 A JP 2006-312596 A JP 2010-3279 A

  The present invention has been made in view of the above problems, and a main object of the present invention is to provide a nail varnish capable of operating a capacitive touch panel with a nail tip when applied to the nail.

  The present invention provides a nail varnish characterized in that the coating applied to the surface of the nail has an amount of a conductive material that can impart to the nail the conductivity that allows the capacitive touch panel to operate. To do.

According to the present invention, since the nail polish liquid has a conductive material, when the nail coated with the nail polish liquid approaches or comes into contact with the capacitive touch panel, the finger approaches or comes into contact, The capacitance increases between the capacitive touch panel and the nail coated with the nail polish. That is, in the capacitive touch panel, the capacitance of the electrode corresponding to the area where the nail tip to which the nail varnish is applied approaches or contacts changes. Due to the change in capacitance, the capacitive touch panel can recognize the area where the toe is approaching or touching, and can perform the same operation as when the finger is approaching or touching. .
Conventionally, a miniaturized capacitive touch panel is difficult to operate with a finger because input buttons and the like are small, and a dedicated pen such as a stylus pen is required. However, since the nail polish of the present invention is applied to the nail, it can be operated with the tip of the nail, so that the input button of the miniaturized capacitive touch panel can be touched without any erroneous operation. Input operation becomes possible.

  In the present invention, it is possible to provide a nail varnish that can be applied to the nail to operate the capacitive touch panel with the nail tip.

It is a schematic perspective view which shows an example of a general projection type capacitive touch panel. It is a schematic plan view which shows an example of the transparent electrode layer which comprises the general projection type capacitive touch panel. It is the schematic which shows an example of the operation principle of a general projection type capacitive touch panel. It is a schematic perspective view which shows an example of a general surface type capacitive touch panel. It is a schematic plan view which shows an example of the transparent conductive film which comprises the general surface type capacitive touch panel. It is the schematic which shows an example of the operation principle of a general surface type capacitive touch panel. It is a schematic sectional drawing which shows an example of the nail polish liquid of this invention. It is the schematic which shows the other example of the nail polish liquid of this invention. It is a schematic sectional drawing which shows the other example of the nail polish liquid of this invention. It is a schematic sectional drawing which shows the other example of the nail polish liquid of this invention. It is a schematic sectional drawing which shows the other example of the nail polish liquid of this invention. It is a graph which shows the evaluation result of an Example.

I. Nail Polish Liquid The nail polish liquid of the present invention will be described.
The nail varnish of the present invention is characterized in that the coating applied to the nail surface has an amount of a conductive material that can impart to the nail the conductivity sufficient to operate a capacitive touch panel.
The nail polish in the present invention refers to a liquid before being applied to the nail, and the nail polish refers to a coating film formed by applying the nail polish to the nail.

A general nail polish liquid has a function which prevents a nail | claw crack etc. by apply | coating and drying to a nail | claw and protecting the surface of a nail | claw. In addition to the protective function described above, it has a function of giving a cosmetic effect to the nail surface by drawing a vivid color tone or design.
Hereinafter, description will be given with reference to the drawings.

FIG. 7 is a schematic cross-sectional view illustrating the nail polish of the present invention. As shown in FIG. 7, a nail polish 10 formed by applying a nail polish liquid referred to in the present invention includes a base coat 11 formed by applying a base coat nail polish liquid, a nail color 12 formed by applying a nail color nail polish liquid, and a top coat. It includes a top coat 13 formed by applying a nail polish solution.
The base coat nail polish is used for the purpose of maintaining nail health and is often used as a base for a nail color. Therefore, when the nail color nail polish is applied to the surface of the base coat, a colorless or light color that does not affect the color tone of the nail color nail polish is common.
In addition, nail color nail polish is generally used for decoration purposes, and therefore has a relatively large number of colors and has a variety of colors. In addition to the nail color nail polish, it may be called a nail polish nail polish, a nail enamel nail polish, a nail lacquer nail polish or the like.
Further, the nail polish for top coat has a function as a protective film, and is often used by applying on a nail color. Therefore, when applying the nail polish for nail color after applying the nail polish for nail color, a non-colored or light color that does not affect the color tone of the nail polish for nail color is generally used.

By the way, conventionally, when the nail is extended with the decoration of the nail, it is difficult to bring the finger close to or in contact with the capacitive touch panel, and the capacitive touch panel is operated with the nail tip. There was a problem that it was difficult.
According to the present invention, since the nail polish has a conductive material, when the nail coated with the nail polish approaches or comes into contact with the capacitive touch panel, the finger approaches or comes into contact. The capacitance increases between the capacitive touch panel and the nail coated with the nail polish. In other words, on the capacitive touch panel, the nail tip to which the nail polish is applied approaches or the capacitance of the transparent electrode or transparent conductive film surface corresponding to the contacted area changes, and the nail approaches due to the change in capacitance. Or the contacted area can be recognized. In this way, by applying the nail polish of the present invention to the nail, the capacitive touch panel can be operated with the nail tip as when the finger approaches or comes into contact.
Conventionally, a miniaturized capacitive touch panel has small input buttons and is difficult to operate with a finger, and a dedicated pen such as a stylus pen is required to be used. However, since the nail polish of the present invention is applied to the nail, it can be operated with the tip of the nail, so that the input button of the miniaturized capacitive touch panel can be touched without any erroneous operation. Input operation becomes possible.
Hereinafter, the components of the nail polish of the present invention will be described.

The nail polish of the present invention is not particularly limited as long as it has a conductive material that can operate a capacitive touch panel. Examples of general nail polish components include coloring components, film-forming components, resin components, oil and fat components, plasticizers, solvents, and the like, and conductive materials are included as these components to make the nail polish solution. Conductivity may be imparted, or a conductive material may be included in the nail polish as an additive only for imparting conductivity to impart conductivity to the nail polish.
Hereinafter, the components of the conductive material and nail polish used in the present invention will be described.

A. Conductive material The conductive material in the present invention is not particularly limited as long as it is contained in the nail polish so that the capacitive touch panel can be operated with the nail tip coated with the nail polish.

  The conductive material in the present invention may contain a conductive material as a coloring component, a film-forming component, a resin component, an oil and fat component, a plasticizer, a solvent, or other additives that are components of the nail polish, Or the electroconductive material may be contained in the nail polish liquid as an additive only for electroconductivity provision. In the present invention, it is preferable that the nail polish contains a conductive material as an additive only for imparting conductivity.

In the present invention, the degree of conductivity that can operate a capacitive touch panel differs depending on the type and size of the capacitive touch panel, but is equivalent to, for example, the surface of a human finger. If it has the resistance value of, it will not specifically limit. The resistance value of the nail polish when the nail polish liquid of the present invention is applied to the nail surface is preferably 2.10 × 10 ² Ω or less, for example.

  In addition, the said resistance value is the value measured using 4 terminal measuring system LCR meter Loresta GP MCP-T610 type (Mitsubishi Chemical Analytech Co., Ltd.).

The form of such a conductive material is not particularly limited as long as desired conductivity can be imparted by adding it to the nail polish liquid. For example, powder, liquid, gel, fiber, etc. A conductive material of the form.
Specific examples of the conductive material include conductive pigments and conductive dyes.
Examples of the powdered conductive material include tin oxide, tin-antimony oxide, titanium oxide / tin-antimony oxide, and indium-tin oxide. In addition, metals such as Al, Ag, Au, Cu, Fe, Mn, Mo, Ni, Pd, Pt, Sn, W, and zinc can be used. When the metal powder is used as a nail polish, it can give conductivity to the nail polish and give the nail polish a color with a glitter.
Examples of the liquid conductive material include tin-antimony oxide paint / dispersion, indium-tin oxide paint / dispersion, and the like.
Gel-like conductive materials include, for example, polyacetylene, p-phenylene vinylene, polypyrrole, polythiophene, polyaniline, PVC polymer and butadiene (BD) -acrylonitrile (AN) copolymer mixture, graft copolymer, BD-AN-vinyl chloride Examples thereof include conductive polymers such as terpolymers, PVC-polyurethane graft copolymers, styrene-diene-pyrrole-based terpolymers, polyacetylene derivatives, polypyrrole derivatives, polythiophene derivatives, and polyaniline derivatives.
Examples of the fibrous conductive material include white conductive fibers having a conductive polymer layer made of a polyamide-based thermoplastic polymer and a protective polymer made of a fiber-forming thermoplastic polymer.
In addition to the above, it is also possible to use a conductive material in the form of a colloid or fine particles.

Further, as described above, in addition to the conductive material in which the material itself has conductivity, a conductive material obtained by adding a conductivity-imparting substance to a non-conductive material can be used.
Examples of the non-conductive material include general polymers such as polyolefin, polyamide, polyimide, phenol resin, epoxy resin, and polyurethane.
The conductivity-imparting material, Al, Ag, Au, Cu , Fe, Mn, Mo, Ni, Pd, Pt, Sn, W, and a metal powder such as zinc, ZnO, metal oxides such as SnO _2, stainless steel And metal dispersions such as metal fibers or washer. Further, carbon black such as acetylene black, oil furnace black, and thermal black, carbon carbon fibers such as PAN and pitch, and graphite-based dispersants such as natural products and artificial materials can be used. Furthermore, a glass bead, a synthetic fiber, etc. are mentioned.

As described above, the conductive material used in the present invention is not particularly limited as long as it can impart desired conductivity to the nail polish, and includes, for example, the nail polish of the present invention. It may be a conductive material that can be used as a film forming component.
Moreover, as said electroconductive material, the metal powder, pigment, dye, and polymeric material which have electroconductivity can be selected suitably, and it can also be used combining multiple if necessary.

  The color tone of the conductive material is appropriately selected depending on the color tone of the nail polish of the present invention and its use, and is not particularly limited. Examples of the color tone of the conductive material include transparent, white and other light colors, yellow, brown, blue, and the like. In the present invention, when used for base coat nail polish and top coat nail polish, it is preferably a conductive material exhibiting a light color such as transparent or white, and when used for nail color nail polish, A conductive material that does not affect the color tone of the nail color nail polish is preferable.

  The amount of the conductive material added is not particularly limited as long as the desired conductivity can be imparted to the nail polish, but if the amount added is too small, the nail coated with the nail polish is used. It may be difficult to operate the touch panel, and if the amount of the colored conductive material such as metal powder added is too large, the appearance as a nail polish may be deteriorated and the decorative function may be deteriorated.

B. Constituent Components of Nail Polish Liquid The nail polish liquid of the present invention is not particularly limited as long as it can be made a nail polish liquid exhibiting desired conductivity by using a conductive material.
As a component which comprises the nail polish liquid of this invention, a coloring component, a film formation component, a resin component, a fat and oil component, a plasticizer, a solvent, etc. are mentioned, for example. These components are appropriately adjusted according to the type and purpose of nail polish such as nail color nail polish, base coat nail polish and top coat nail polish.
Hereinafter, the components of the nail polish will be described separately for nail color nail polish and base coat nail polish and top coat nail polish.

1. Components of the nail color nail polish liquid The nail color nail polish liquid composition of the present invention is appropriately adjusted according to color tone, gloss, etc., but a general nail color nail polish liquid is a coloring component, A film forming component, a resin component, an oil and fat component, and a plasticizer are mixed and dissolved in a solvent.
Hereinafter, the coloring component, the film forming component, the resin component, the oil and fat component, the plasticizer, and the solvent will be described.

(1) Coloring components Original nail color nail polish has the purpose of decorating nails, and has red, blue, green, yellow, and other colors, white, black brightness, spectral colors, and interference colors. Nail polish for nail colors with various tones such as colors are on the market. Also in the present invention, it is possible to produce the nail color of the present invention having various color tones by using a coloring component as a constituent of the nail color nail polish.

The coloring component is not particularly limited as long as the nail color nail polish of the present invention can have a desired color tone. For example, inorganic pigments, organic pigments, organic dyes, metal foils, plastic foils, fish scales, mica powders, fluorescent dyes and the like can be mentioned.
In the present invention, the above-described components may be used alone, or a plurality of types may be mixed and used.

The content of the colored component in the nail color nail polish of the present invention is not particularly limited, and is appropriately adjusted depending on the type of the colored component and the target color tone.
In addition, the said coloring component is not an essential structural component in the nail polish of this invention.

(2) Film-forming component As the film-forming component constituting the nail color nail polish of the present invention, nitrocellulose is generally used. This is because nitrocellulose has high strength and excellent quick drying properties. In addition to nitrocellulose, acetylcellulose, cellulose acetate butyrate, and the like can be used.

(3) Resin component In addition to the above-described materials, a resin component may be added to impart properties such as flexibility, adhesion, and gloss to the physical properties of the film-forming component.

Examples of such resin components include alkyd resins, acrylic resins, methacrylic resins, melamine resins, polyester resins, vinyl resins, styrene resins, maleic acid resins, modified resins thereof, and copolymers thereof.
Examples of the natural resin include dammar, shellac, and tichro.

(4) Oil and fat component In addition to the above-described materials, an oil and fat component may be added to impart properties such as removability and restorability to the physical properties of the film-forming component and to impart compatibility of the constituent components. .

  Examples of such fats and oils include paraffin, wax, fatty acid or glyceride thereof, higher aliphatic alcohol, carba wax, beeswax, silicone wax and the like.

  By blending the oil and fat component, an effect of preventing excessive defatting of the skin and nails by the solvent can be obtained.

(5) Plasticizer In order to impart flexibility to the physical properties of the film-forming component and prevent cracking and peeling of the film, a plasticizer may be added in addition to the materials described above.

Examples of such plasticizers include dibutyl phthalate, dioctyl phthalate, diisooctyl adipate, acetyl tributyl citrate, dibenzyl sebacate, and triacetin dicetyl lactate (DCM).
In addition, 1,7,7-trimethylbicyclo [2.2.1] heptan-2-one (camphor) is used as a specific plasticizer for the nitrocellulose as the film forming component.

(6) Solvent The solvent that is a constituent component of the nail color nail polish is for uniformly dissolving the above-described materials that are constituent components of the nail color nail polish.
In addition to the uniform solubility of each material, the above solvent is appropriately adjusted by examining the drying speed of the coating film, spreadability, smooth finish, feeling of use, smell, and the like.

  Examples of such solvents include ethyl acetate, methyl formate, dimethyl carbonate, ethyl ether, acetone, methyl ethyl ketone, ethyl alcohol, isopentane, cyclopentane, and petroleum ether having a boiling point of 100 ° C. or lower, butyl acetate, Medium boiling solvents such as isobutyl acetate, methyl ethyl ketone, cellosolve, cellosolve acetate, cyclohexanone, furfural, butyl alcohol, amyl alcohol, toluene, solvent naphtha, etc. in the range of 100 ° C. to 150 ° C., diacetone alcohol, pendyl alcohol, Examples include carbitol, butyl lactate, ethyl benzoate, decalin, high-solubility naphtha, pine oil, turpentine oil and the like having a boiling point in the range of 150 ° C to 180 ° C.

(7) Other additives As components of the nail color nail polish of the present invention, in addition to the above-mentioned coloring component, film forming component, resin component, oil and fat component, plasticizer, solvent, powder as other additives One type or two or more types of agents, pastes, surfactants, stabilizers, acid-alkali agents, masking agents, brighteners, and fragrances can be used, and they are appropriately selected according to the use and purpose.

2. Components of the base coat nail polish and top coat nail polish The components of the base coat nail polish and top coat nail polish of the present invention are appropriately adjusted according to adhesion, gloss, etc. Since it can be the same as that of the nail polish for use, description here is omitted.
However, in the case of the base coat nail polish and the top coat nail polish, the composition of the constituent components is slightly different in order to meet the purpose.
Hereinafter, the base coat nail polish and the top coat nail polish will be described separately.

(1) Base coat nail polish A general base coat nail polish is used for the purpose of maintaining nail health and preventing cracking of the nail, and is applied directly to the nail. In many cases, the nail color nail polish is applied after the base coat nail polish is applied. Therefore, a thing with high adhesiveness with a nail | claw and nail polish nail polish liquid is preferable.

  The base coat nail polish of the present invention preferably uses, for example, nitrocellulose having a nitrification degree of 12 as a film forming component which is a constituent of the nail polish.

  Moreover, it is preferable that the compounding amount of the resin component is slightly increased as compared with the nail color nail polish and the like, and the compounding amount of the medium boiling point solvent is increased. This is because the adhesion of the coating film can be improved.

(2) Nail polish liquid for top coat General nail polish liquid for top coat is used for the purpose of protecting the surface of the nail decorated with nail color nail polish so as not to be scratched. Apply from above nail color nail polish. Therefore, the thing which can harden a coating surface by apply | coating the nail polish liquid for topcoats is preferable.

  The top coat nail polish of the present invention preferably uses, for example, nitrocellulose having a nitrification degree of 11 as a film forming component which is a constituent of the nail polish. This is because the painted surface can be hardened.

II. Method of applying nail polish Liquid The method of applying nail polish of the present invention will be described.
The nail polish liquid of the present invention is obtained by using the capacitance type touch panel through the nail polish applied to the nail surface when the nail to which the nail polish is applied contacts the surface of the capacitance type touch panel. The contact position and the human body are connected, and the capacitive touch panel is operated.
In order to obtain the above effect, it is necessary to apply the nail polish so that the nail polish of the present invention and the human body are in contact with each other, and when the toe touches the surface of the capacitive touch panel. It is necessary to apply nail polish to the contact surface of the toe.
At this time, the nail polish applied to the toe portion approaching or contacting the capacitive touch panel and the nail polish applied so as to come into contact with the human body must be electrically connected to each other. Therefore, it is necessary to apply the nail varnish continuously from the toe part to the part where the nail varnish and the human body come into contact.
Hereinafter, the method of applying the nail polish of the present invention so as to come into contact with the human body and the method of applying the nail polish to the toe portion that comes into contact with the capacitive touch panel will be described in detail.

A. Method of applying in contact with human body A method of applying the nail polish of the present invention in contact with the human body will be described with reference to the drawings.

FIG. 8A is a schematic view showing a finger in which the nail polish of the present invention is applied to the nail surface. 8B is a cross-sectional view taken along the line AA in FIG. 8A, and FIG. 8C is a cross-sectional view taken along the line BB in FIG. 8A.
As shown in FIG. 8 (a), a nail polish (hereinafter sometimes simply referred to as nail polish) 10 formed by applying the nail polish of the present invention is applied to the surface of the nail 7. In addition, there is an effect that the capacitive touch panel can be operated with a toe to which the nail polish is applied.
In order to obtain such an effect, it is necessary that a part of the human body other than the nail polish and the nail be in contact with each other when the nail polish liquid is applied to the nail surface. When the toe coated with the nail polish liquid of the present invention approaches or contacts the surface of the capacitive touch panel, the capacitive touch panel and the human body are connected via the nail polish, This is because the capacitive touch panel operates when current flows.

In the present invention, the contact between the nail polish and the human body means that when the nail polish is applied to the surface of the nail, the nail polish touches the skin around the nail at least at one place. .
For example, as shown in a region surrounded by a dotted line in FIGS. 8A and 8B, the cuticle 8 on the finger 100 and the nail polish 10 are applied so as to come into contact with each other. The cuticle is the skin for protecting the nail half-moon, and the nail half-moon is the part that creates the nail at the nail growth.
Further, as shown in FIG. 8 (b), the nail polish 10 may be applied in contact with the back surface of the nail 7 and the skin 9B on the back of the nail at the boundary between the nail 7 and the skin, Alternatively, as shown in FIG. 8C, even if the nail polish 10 is applied in contact with the skin 9S at the edge of the nail parallel to the length direction of the nail 7 and at the boundary between the nail 7 and the skin. Good.

In addition, as a coating method when all of the base coat nail polish liquid, the nail color nail polish liquid and the top coat nail polish liquid which are the nail polish liquid of the present invention are applied to the nail, at least the human body and the capacitive touch panel are used. If it is connected by the nail polish of this invention, it will not specifically limit.
FIG. 7 is a schematic cross-sectional view showing a finger with a conductive base coat nail polish, nail color nail polish, and top coat nail polish applied on the surface of the nail 7. As shown in FIG. 7, a base coat (hereinafter sometimes simply referred to as a base coat) 11 to which a base coat nail polish is applied, a nail color to which a nail color nail polish is applied (hereinafter simply referred to as a base coat). In some cases, it is referred to as a nail color.) 12 and a top coat (hereinafter sometimes referred to simply as a top coat) 13 to which a top coat nail polish is applied are all in contact with the human body. Although not shown, one or two of a base coat, a nail color and a top coat may be applied so as to come into contact with the human body. In the present invention, it is preferable that all of the nail polish applied to the nail surface is in contact with the human body from the viewpoint of reliably contacting the nail polish of the present invention with the human body.

As described above, when the nail polish of the present invention is applied in contact with the human body, the area where the nail polish and the human body, that is, the skin of the cuticle or the nail, contact is applied to the capacitive touch panel and the nail. The nail polish and the human body are not particularly limited as long as the capacitive touch panel and the human body are connected to each other so that the capacitive touch panel can be operated. And preferably has a contact area of about 30 mm ² . When the contact area between the nail polish and the human body is the above-described size, when the nail polish approaches or comes into contact with the capacitive touch panel, the human body and the capacitive touch panel are connected via the nail polish. This is because a sufficient reaction is observed.
Here, the contact area refers to the total area where the cuticle and the skin at the nail are in contact with the nail polish.

B. Method for Applying Nail Polish Solution of the Present Invention to the Capacitance Type Touch Panel A Method for Applying the Manicure Liquid of the Present Invention to the Portion That Touches the Capacitance Type Touch Panel will be described with reference to the drawings.

FIG. 9 is a schematic cross-sectional view showing a finger with the nail polish of the present invention applied to the nail.
Since the nail polish 10 of the present invention has electrical conductivity, the capacitive touch panel can be operated even when the nail 7 coated with the nail polish approaches or comes into contact with the capacitive touch panel. There is an effect.
In order to obtain such an effect, as described above, the nail polish of the present invention needs to be applied in contact with the human body, but at the same time, it approaches or contacts the capacitive touch panel. The nail polish of the present invention needs to be applied to the toe. When the toe approaches or comes into contact with the capacitive touch panel, the capacitive touch panel and the human body are connected via the nail polish of the present invention, and the capacitance flows as a result of current flowing. This is because the touch panel of the method operates.

In the present invention, the nail polish of the present invention is applied to the toe that comes into contact with the capacitive touch panel. For example, as shown in FIG. 9A, the nail polish 10 of the present invention extends to the tip of the nail 7. It may be applied or may be applied from the tip of the nail 7 to the back as shown in FIG. In the present invention, it is preferable to apply the nail polish from the tip of the nail to the back. When the toe coated with the nail polish of the present invention approaches or comes into contact with the capacitive touch panel, a capacitance is generated between the toe coated with the nail polish and the surface of the capacitive touch panel However, the contact position is detected by the change in the capacitance, but the capacitance generated at this time is proportional to the contact area. Therefore, it is preferable that the nail polish is applied to a wider area in the nail tip area that contacts the capacitive touch panel.
In addition, the action of applying the nail polish to the back surface of the toe is originally performed, and has an effect of making it difficult to peel off the applied nail polish.
As shown in FIG. 9 (b), the back surface here may be only the nail tip region on the back surface, or the entire back surface, although not shown.
In addition, about the code | symbol which is not demonstrated in FIG. 9, since it can be the same as that of FIG. 8, it abbreviate | omits.

FIG. 10 is a schematic cross-sectional view showing a finger with the nail polish of the present invention applied to the nail.
As shown in FIG. 10, the nail polish 10 formed by applying the nail polish solution of the present invention includes a base coat 11, a nail collar 12 and a top coat 13.
When the base coat nail polish liquid, nail color nail polish liquid and top coat nail polish liquid of the present invention are applied to the nail, all of the nail polish liquid is applied to the nail tip region which comes into contact with the capacitive touch panel. Alternatively, it is sufficient that at least one type is applied to the nail tip region that contacts the capacitive touch panel.
For example, as shown in FIG. 10A, the base coat 11 and the nail collar 12 may not cover the tip of the nail 7, and only the top coat 13 may cover the tip of the nail 7. As shown in FIG. 10B, the nail collar 12 and the top coat 13 may not cover the tip of the nail 7, and only the base coat 11 may cover the tip of the nail 7. Further, as shown in FIG. 10C, the base coat 11 and the top coat 13 may not cover the tip of the nail 7, and only the nail collar 12 may cover the tip of the nail 7.

  In FIG. 10C, the nail collar 12 covers only a part of the nail 7, but the base coat 11, the nail collar 12 and the top coat 13 shown in FIG. 10C all have conductivity. It is the manicure 10 of the present invention. Therefore, even if the nail collar 12 covers only a part of the nail 7 as shown in FIG. 10C, when the nail collar 12 approaches or comes into contact with the capacitive touch panel, the capacitance described above. The touch panel of the system is electrically connected to the human body through the base coat 11 and the top coat 13 that are in contact with the nail collar 12. Therefore, when using the base coat nail polish liquid, the nail color nail polish liquid, and the top coat nail polish liquid according to the present invention, it is applied so that the capacitive touch panel and the human body are electrically connected. It is not necessary to apply all the nail polish to the entire surface of the nail surface, and it is possible to adjust appropriately according to the design and purpose.

C. Method for applying nail polish As described above, the method for applying nail polish of the present invention is not particularly limited as long as the capacitive touch panel and the human body are connected, depending on the design and the like. It is appropriately selected.

Further, when applying the base coat nail polish liquid, the nail color nail polish liquid, the top coat nail polish liquid to the nail surface, in the present invention, among the base coat nail polish liquid, the nail color nail polish liquid, and the top coat nail polish liquid, The nail polish of the present invention having at least one of conductivity may be used.
FIG. 11 is a schematic cross-sectional view showing a method of applying a nail polish when only one of the base coat nail polish, the nail color nail polish, and the top coat nail polish has conductivity.
First, FIG. 11A shows a case where only the base coat 11 has conductivity. In this case, the base coat 11 having conductivity is in contact with the human body (herein, the cuticle 8), and the toe portion that is in contact with the capacitive touch panel is covered with the base coat 11. Therefore, even if the nail collar 12 and the top coat 13 on the base coat 11 are not conductive, the toe tip where the base coat 11 of the present invention having conductivity is in contact with the human body and in contact with the capacitive touch panel By covering the portion, when the toe approaches or comes into contact with the capacitive touch panel, it can be operated in the same manner as a finger.
Next, FIG.11 (b) shows the case where only a nail color has electroconductivity. In this case, the conductive nail collar 12 is in contact with the human body (here, the cuticle 8), and the toe portion that is in contact with the capacitive touch panel is the nail, as in FIG. The collar 12 covers it. Therefore, the effect of the present invention can be obtained even in the case shown in FIG.
Moreover, FIG.11 (c) shows the case where only topcoat has electroconductivity. In this case, similarly to the above-described FIGS. 11A and 11B, the conductive top coat 13 is in contact with the human body (the cuticle 8 in this case), and the toe is in contact with the capacitive touch panel. The top coat 13 covers the portion. Therefore, the effect of the present invention can be obtained also in the case shown in FIG.

  The present invention is not limited to the above embodiment. The above-described embodiment is an exemplification, and the present invention has substantially the same configuration as the technical idea described in the claims of the present invention, and any device that exhibits the same function and effect is the present invention. It is included in the technical scope of the invention.

  The following examples illustrate the present invention in more detail.

[Example 1]
(Preparation of nail polish mixture)
The following materials were mixed to prepare a nail polish mixture.
Nitrocellulose 15.0% by weight
Alkyd resin 8.0% by weight
Diptyl phthalate 4.0% by weight
Butyl acetate 30.0% by weight
Ethyl acetate 12.0% by weight
Ethanol 6.0% by weight
Butanol 3.0% by weight
Toluene 22.0% by weight

(Preparation of nail polish)
Next, 45% by weight of Ag metal powder as a conductive material was added to the nail polish mixture to make a nail polish.

(Measurement of resistance value)
The resistance value of the nail polish was measured using a 4-terminal measurement type LCR meter Loresta GP MCP-T610 type (Mitsubishi Chemical Analytech Co., Ltd.).
First, the nail polish solution is uniformly applied on a non-conductive glass substrate to a film thickness of 6 to 8 μm, and the four contact terminals (probes) of the device are brought into contact with the nail polish uniformly applied on the glass substrate, The resistance value was confirmed.

(Confirmation of operability of capacitive touch panel)
Next, it was confirmed whether or not the nail varnish had sufficient conductivity to operate a capacitive touch panel.
First, the nail polish solution was uniformly applied on a non-conductive glass substrate of 15 mm × 50 mm so as to have a film thickness of 6 to 8 μm. At that time, in order to ensure the contact area between the nail polish and the capacitive touch panel, the entire surface of the non-conductive glass substrate, the back surface tip portion 8 mm (contact portion with the touch panel), the front surface and the back surface The nail polish solution was applied to the side surface of the non-conductive glass substrate connecting the application regions.
At the time when the confirmation operation of the capacitive type touch panel, for remembering 30 mm ² approximately of the contact surface to the human body and the nail polish was the manicure approaches or contacts the capacitive touch panel, The capacitive touch panel and the human body were connected via the nail polish.
Then, using a projected capacitive touch panel sensor evaluation kit (Synaptics), the signal level when the nail polish approaches or touches the capacitive touch panel is evaluated. It was determined whether or not the touch recognition level of the capacitive touch panel was satisfied. The contact area between the nail polish and the capacitive touch panel was about 8 mmφ circular area. Note that the capacitive touch panel used this time required a capacitance of less than 1 pf to operate.

[Example 2]
A nail polish was prepared in the same manner as in Example 1 except that 36% by weight of Ag metal powder as a conductive material was added to the nail polish, and the same evaluation as in Example 1 was performed.

[Example 3]
The nail polish was prepared in the same manner as in Examples 1 to 2 except that 50% by weight of Au metal powder as a conductive material was added to the nail polish, and the same as in Examples 1 to 2. Was evaluated.

[Example 4]
The nail polish was prepared in the same manner as in Examples 1 to 3 except that 80% by weight of ITO powder as the conductive material was added to the nail polish, and the same as in Examples 1 to 3. Evaluation was performed.

[Example 5]
The nail polish was prepared in the same manner as in Examples 1 to 4 except that 10% by weight of ITO powder as a conductive material was added to the nail polish, and the same as in Examples 1 to 4. Evaluation was performed.

[Example 6]
The nail polish was prepared in the same manner as in Examples 1 to 5, except that 40% by weight of ITO powder as a conductive material was added to the nail polish and 40% by weight of IZO powder was added to the nail polish. The same evaluation as in Examples 1 to 5 was performed.

[Example 7]
A nail polish was prepared in the same manner as in Examples 1 to 6, except that 90% by weight of a conductive polymer as a conductive material was added to the nail polish, and the same as in Examples 1 to 6. Evaluation was performed.

[Comparative example]
A nail polish was prepared in the same manner as in Examples 1 to 7 except that the nail polish did not have a conductive material, and the same evaluation as in Examples 1 to 7 was performed.

[Evaluation results]
When the resistance value of the nail polish was 2.10 × 10 ² Ω or less, it was confirmed that the operation of the capacitive touch panel by nail polish was possible.
Table 1 shows resistance values, maximum detection reaction values, and determination results of Examples 1 to 7 and Comparative Examples based on the content of the conductive material.
Moreover, the measurement result of the maximum detection reaction value is shown in FIG.
The determination result was “◯” when the maximum detection reaction value was such that the capacitive touch panel would react, and the determination result was “X” when the maximum detection reaction value was less than that.

DESCRIPTION OF SYMBOLS 1 ... Electrostatic capacitance type touch panel 2 ... Transparent substrate 3 ... Transparent electrode layer 31, 32 ... 1st transparent electrode layer, 2nd transparent electrode layer 31X, 32Y ... Transparent electrode 4 ... Protective cover 5X, 5Y ... For X coordinate detection Conductive part, conductive part for Y-coordinate detection 6 ... Transparent conductive film 61 ... Electrode 7 ... Nail 8 ... Cuticle 9B ... Skin on the back of the nail 9S ... Skin on the nail 10 ... Manicure 11 ... Base coat 12 ... Nail color 13 ... Top coat 100 ... finger

Claims (1)

A coating applied to the surface of the nail is a nail polish having an amount of a conductive material that can impart to the toe the conductivity to the extent that the capacitive touch panel operates.
The conductive material is a conductive material exhibiting a transparent or white light color,
Further, a nail polish liquid for base coat or top coat.

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