JP7085398B2 - Applying tool - Google Patents

Description

The present invention relates to a coating tool for applying a coating liquid such as ink or a cosmetic liquid, such as a writing tool or a cosmetic tool.

As is well known, various coating tools such as writing tools such as brush pens or cosmetic tools, and coating tools such as ink or cosmetic liquid are conventionally used to apply a coating liquid such as ink or cosmetic liquid to a coating medium such as a paper surface or a skin surface.

In particular, there is an increasing demand for fine coating, and in order to respond to this, a coating tool that reliably guides the coating liquid to the tip portion while the coating portion has a small diameter and tries to apply the coating liquid in a good state is disclosed. ing.

For example, Patent Document 1 discloses a coating tool in which a core is charged in a writing portion to guide a liquid, and in order to prevent leakage of the coating liquid of the coating tool, a collector is provided by a toe shaft and a shaft body. Covering.

Further, Patent Document 2 discloses a structure in which a liquid supply portion having a groove is provided on the outer periphery of a fine brush, and the liquid supply portion is fixed by press-fitting into a batting. No fixed means are disclosed.

Japanese Unexamined Patent Publication No. 2015-2984 Japanese Unexamined Patent Publication No. 2012-101395

In view of such circumstances, the present invention provides a coating tool capable of reliably supplying a liquid from a relay core to a liquid guiding portion provided around the coating portion.

The present invention is a coating tool in which a coating portion is provided in a shaft cylinder and a liquid is guided to the coating portion by a relay core. In the shaft cylinder, a tubular liquid derivative is arranged around the coating portion to provide the liquid. A coating tool in which a derivative is in contact with the outer periphery of the coating portion and a relay core and a collector are attached from behind the liquid derivative, and a coating liquid guide groove is formed in the relay core or the collector. be.

In the present invention, it is preferable that a step portion is formed on the inner peripheral surface of the front end of the collector, and a coating liquid guide groove is formed on the step portion. The coating liquid can be reliably guided even through the step.

In the present invention, it is preferable that the step portion is formed with a locking portion for locking the rear end of the liquid derivative.

In the present invention, it is preferable that the relay core is made of a material that does not contain formaldehyde. The formaldehyde-free material refers to a material that does not substantially contain synthetic resins such as acetal resin, phenol resin, urea resin, and melamine resin. Specifically, it shows that the object, i.e. the relay core, contains less than 500 ppm, preferably less than 200 ppm of free formaldehyde based on the total weight of the polyaldehyde solids measured according to the VDA275 test method.

In the present invention, it is preferable that the center of gravity of the applicator is arranged at the rear portion in the axial direction.

According to the coating tool of the present invention, by forming a groove in the collector or the relay core, the coating liquid outflow property is improved, so that the liquid can be reliably supplied from the relay core to the liquid derivative and the coating portion. It can produce an excellent effect.

In particular, when the flange portion is formed in the coating portion, the size does not depend on the outer diameter thereof, so that the coating portion can be easily miniaturized.

Further, by using a material that does not contain formaldehyde for the relay core, it is possible to prevent formalin from elution into a coating liquid such as a cosmetic liquid, and to provide a highly safe coating tool. It is preferable to use an olefin-based elastomer.

Further, by setting the center of gravity of the applicator at the rear portion, it is possible to provide a stable usability when applying the applicator to the eyes or the like.

It is explanatory drawing of the state which attached the cap of the collector type coating tool which concerns on 1st Embodiment of this invention, (a) is the whole side view, (b) is the whole longitudinal section along the line BB of (a). The top view, (c) is a partially enlarged vertical sectional view from the writing part to the front part of the collector in (b). It is explanatory drawing of the state which the cap of the collector type coating tool which concerns on 1st Embodiment is removed, (a) is the whole side view, (b) is the whole vertical sectional view along the line BB of (a). , (C) is a partially enlarged vertical sectional view from the writing part to the collector front part in (b). It is a component diagram of the liquid derivative of the collector type coating tool according to the first embodiment, (a) is a perspective view from the front, (b) is a perspective view from the front, (c) is a side view, and (d) is. (C) is a vertical cross-sectional view along the DD line, (e) is a perspective view from the rear, and (f) is a perspective view from the rear. It is a component drawing of the collector of the collector type coating tool which concerns on 1st Embodiment, (a) is a view from the front, (b) is one side view seen from the slit side, (c) is (a). A vertical sectional view along the line CC, (d) is another side view, (e) is a vertical sectional view along the line EE of (a), and (f) is a rear view. It is a perspective view of the collector of the collector type coating tool which concerns on 1st Embodiment, (a) is a perspective view from a little front, (b) is a perspective view from the front, (c) is a perspective view from the rear. be. It is a perspective view which combined the collector of the collector type coating tool which concerns on 1st Embodiment, and the coating part. It is a perspective view which combined the collector of the collector type coating tool which concerns on 1st Embodiment, a liquid derivative, and a coating part. It is a component drawing of the relay core of the collector type coating tool which concerns on 1st Embodiment, (a) is a perspective view, (b) is a side view. It is explanatory drawing of the state which the cap of the collector type coating tool which concerns on 2nd Embodiment is removed, (a) is the whole side view, (b) is the whole vertical sectional view along the line BB of (a). , (C) is a partially enlarged vertical sectional view from the writing part to the collector front part in (b). It is a component drawing of the collector of the collector type coating tool which concerns on the 2nd Embodiment, (a) is a view from the front, (b) is one side view seen from the slit side, (c) is (a). A vertical sectional view along the line CC, (d) is another side view, (e) is a vertical sectional view along the line EE of (a), and (f) is a rear view. It is a component drawing which combined the collector and the relay core of the collector type coating tool which concerns on the 2nd Embodiment, (a) is a view from the front, (b) one side view, (c) is C of (a). -A vertical sectional view along line C, (d) is a perspective view from the front, (e) is a perspective view from the rear, and (f) is a perspective view from the rear. It is a component diagram of the relay core of the collector type coating tool according to the second embodiment, (a) is a view from the front, (b) a view from above (slit side) (one side view), (c). ) Is a vertical cross-sectional view along the CC line of (a), (d) is a view from another side (other side view), and (e) is a vertical cross-sectional view along the EE line of (a). , (F) is a perspective view from the front, (g) is a perspective view from the rear, and (h) is a perspective view from the rear.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

1 to 8 are explanatory views of a collector-type coating tool according to the first embodiment. FIG. 1 shows a state in which the cap is attached with the collector-type applicator, and FIG. 2 shows a state in which the cap is removed. FIG. 3 is a liquid derivative (for example, a sintered body), and FIGS. 4 and 5 are parts diagrams of the collector. FIG. 6 is an assembly diagram in which the collector and the coating portion are combined, FIG. 7 is an assembly diagram in which the collector, the coating portion and the liquid derivative are combined, and FIG. 8 is a component diagram of the relay core.

As shown in FIGS. 1 and 2, in this coating tool, a coating portion 10 is provided in a toe shaft (corresponding to a "shaft cylinder") 12, and a coating liquid (simply "liquid") is provided by a relay core 14 mounted in the collector 18. ”) Is guided to the coating unit 10. In this coating tool, a tubular liquid derivative 20 is arranged around the coating portion 10 in the front shaft 12, and the front end portion of the coating portion 10 protrudes and is exposed from the tip of the front shaft 12. The liquid derivative 20 is in contact with the outer periphery of the coating portion 10. Further, in the tip shaft 12, the tip end portion of the collector 18 is mounted so as to wrap the rear end portion of the liquid derivative 20. The tip of the relay core 14 in the collector 18 is in contact with the rear end surface of the coating portion 10 to guide the liquid, and the collector 18 is configured to guide the liquid via a plurality of coating liquid guiding grooves 18d (see FIG. 4). The coating tool is designed so that the coating liquid is guided from the core 14 to the liquid derivative 20. It should be noted that the coating liquid guide groove 14b (see FIG. 12) can also be formed in the relay core 14 as in the collector-type coating tool according to the second embodiment described later.

A more specific configuration will be described with reference to the drawings.

In the applicator according to the first embodiment, as shown in FIGS. 1 and 2, a coating portion 10 formed on a flange 10a having an enlarged rear end portion is provided in the front shaft 12, and a liquid is provided by a relay core 14. Is a coating tool that guides the coating unit 10.

The front shaft 12 is fitted and fixed to the tip of the shaft body 16 (inside the liquid accommodating portion 16a). A collector 18 is mounted in the toe shaft 12 and the shaft body 16.

[Collector 18]
As shown in FIGS. 1 and 2, a hollow hole 18a along the axial direction is formed through the inside of the collector 18, and the relay core 14 is mounted in the hollow hole 18a. Further, a plurality of single-wafer bodies 18b are arranged outside the collector 18 at intervals, and the collector 18 functions to hold the liquid between the single-wafer bodies 18b. As shown in FIG. 4 (e), a slit 18c is formed so as to cut the single-wafer body 18b in the vertical direction (axial direction), and a rib 18a1 is formed in the hollow hole 18a. It has a structure that supports the relay core 14.

Liquid is temporarily held in the collector 18 by capillary force between the sheet piles 18b via the slit 18c so that the liquid can flow in and out. The collector 18 is mounted inside from the front shaft 12 to the shaft body 16, and the inside of the shaft body 16 from the rear portion of the collector 18 becomes the liquid accommodating portion 16a (see FIGS. 1 and 2). The rear end surface (rear end portion) of the relay core 14 mounted in the hollow hole 18a of the collector 18 is exposed to the liquid accommodating portion 16a, and the relay core 14 directs the liquid in the liquid accommodating portion 16a forward. It is a configuration to guide.

As shown in FIG. 4, the tip of the collector 18 has a cup shape, and the tip of the cup is positioned by being fitted into a step portion 12d formed inside the front shaft 12. Further, as shown in FIGS. 1 and 2, the rear end of the liquid derivative 20 in the front shaft 12 is pressed by the front step portion 18e1 formed inside the cup-shaped tip portion of the collector 18. Further, the tip of the relay core 14 in the collector 18 is in contact with the rear end of the coating portion 10. The rear end portion of the collector 18 is exposed to the liquid accommodating portion 16a, and when the internal pressure of the collector 18 rises, the coating liquid in the liquid accommodating portion 16a passes through the slit 18c and the single-wafer body 18b of the collector 18 is used. Hold in between. The front shaft 12 is formed with an air hole 12b for ventilating the inside and outside. The outside air flows from the air hole 12b to the inside of the front shaft 12, and therefore, the outside air flows to the single-wafer body 18b and the slit 18c on the outer periphery of the collector 18 housed in the front shaft 12. Even if the internal pressure of the liquid accommodating portion 16a fluctuates, it is alleviated by the ventilation in the toe shaft 12 to prevent the coating liquid from being blown out from the coating portion 10 or the like, running out of the coating liquid, or the like.

Specifically, as shown in FIGS. 4 to 6, the tip side of the collector 18 has a bowl shape, and a plurality of coating liquid guiding grooves 18d are formed along the axial direction in the inner peripheral portion thereof, and the coating liquid is formed. The guide groove 18d allows the coating liquid from the toe shaft 12 (shaft cylinder) to pass through, so that a stable outflow can be obtained. It is preferable that the width of the coating liquid guiding groove 18d appropriately corresponds to the viscosity of the coating liquid and the capillary force to guide the coating system to the coating portion, but in the embodiment, 0.1 to 0.5 mm is preferable.

A front step portion 18e1 and a rear step portion 18e2 are formed in the axial direction at the plurality of coating liquid guide groove 18d forming portions of the collector 18. That is, the front step portion 18e1 in which the locking portion for locking the rear end of the liquid derivative 20 is formed in the step portion, and the rear side for locking the flange 10a at the rear end of the coating portion 10. It has a step portion 18e2. A convex portion 18f that engages with the concave portion 14a at the front of the relay core 14 is formed so as to project in the inner diameter direction behind the stepped portion 18e1 on the front side and the stepped portion 18e2 on the rear side.

In fixing the liquid derivative 20, as shown in FIG. 1, an interference portion 22 may be provided in the toe shaft 12 so as to press the outer surface of the liquid derivative 20 by the inner surface of the toe shaft 12.

[Axis 16]
As shown in FIGS. 1 and 2, the shaft body 16 is partitioned by a partition wall 16b, and the front side of the partition wall is located in the liquid accommodating portion 16a. It is blocked by. The appearance design can be improved by selecting the color of the tail plug 16c or the like.

Further, the rear portion of the front shaft 12 (rear portion of the flange portion 12a) is fitted into the front portion of the shaft body 16, and the rear portion of the collector 18 mounted in the front shaft 12 is the shaft body 16. It is adjacent to the other side.

In the front portion of the shaft body 16, the space between the rear portion of the collector 18 and the partition wall 16b is the liquid accommodating portion 16a, and the liquid is stirred together with the liquid (coating liquid) in the liquid accommodating portion 16a. A stirring ball 16d for the purpose is housed.

[Front axis 12]
As shown in FIGS. 1 and 2, the front shaft 12 is a resin product having a hollow structure in which the front portion is tapered in a tapered shape and the rear portion is in the shape of a pipe.

Further, there are a front portion and a rear portion of the front shaft 12, and a flange portion 12a is formed so as to project outward in the outer radial direction on the outer peripheral surface of the rear portion.

Further, the inside of the front portion has a stepped smaller diameter (a step portion 12d is formed), and an air hole 12b is opened slightly along the axial direction at a rear portion adjacent to the reduced diameter portion. In the state, a plurality of places are formed in the circumferential direction.

The inner surface of the front portion is tapered in a tapered shape, and the diameter of the front portion is reduced in a stepped manner at the tip to form the opening portion 12c of the front end. The structure is such that the tip is locked and prevented from coming off. In the front shaft 12, the inner diameter of the front opening 12c is formed to be the smallest through the front and rear portions.

Further, a portion adjacent to the air hole 12b inside the tip of the toe shaft 12 is connected to a stepped portion 12d having a reduced diameter. The tip portion of the collector 18 is fitted and fixed to the step portion 12d. Further, an annular projection, which is an interference portion 22 described later, can be formed inwardly at a destination portion adjacent to the step portion 12d. The inner surface of the toe shaft 12 ahead of the protrusion of the interference portion 22 is gently tapered in diameter.

The front shaft 12 has a substantially cylindrical rear portion, and the flange portion 12a is formed by expanding the outer periphery of the rear portion. In the front shaft 12, a portion rearward from the flange portion 12a is inserted into and fixed to the tip portion of the shaft body 16 (see FIGS. 1 and 2). When the front shaft 12 is mounted on the shaft body 16, the flange portion 12a abuts on the tip end portion of the shaft body 16 so that the front shaft 12 does not slip into the shaft body 16.

It should be noted that, on the outer periphery of the rear portion of the flange portion 12a of the front shaft 12, a plurality of uneven portions are formed to prevent and fix the flange portion 12a when it is fitted to the shaft body 16. Concavo-convex portions are also formed at the inner peripheral portions of the shaft body 16 corresponding to the plurality of portions, and are fitted to each other to maintain liquid tightness and prevent them from coming off.

[Cap 24]
In the coating tool, as shown in FIG. 1, the inner cap 24a of the cap 24 covering from the coating portion 10 to the front shaft 12 when not in use is in airtightly in contact with the rear slope of the air hole 12b of the front shaft 12. .. In the main body forming the outer wall of the cap 24, the inner cap 24a is urged backward by the spring 24b. The main body of the cap 24 is fitted to the toe shaft 12 and abuts on the flange portion 12a.

Further, the toe shaft 12, the shaft body 16, the cap 24 and the like can be formed of a liquidtight material such as various resin materials such as polyethylene, polypropylene and ABS.

[Applying portion 10]
The coating portion 10 is composed of a brush having a plurality of bristles.

The coating portion 10 has a brush shape and can be a fine brush having an outer diameter of 2.0 mm or less. The brush of the coating portion 10 may be either a natural fiber or an artificial fiber. In FIGS. 1 to 2, the coating portion 10 is a bundle of resin fibers, has a tapered shape in which the tip portion is formed as thinner as the tip portion, and the rear end portion is heat-welded in the outer peripheral direction. It is formed into a protruding flange shape (flange 10a) and the fibers are fixed so as not to come apart. At the rear end of the coating portion 10, the peripheral flanges 10a are clogged between the fibers and the coating liquid is difficult to penetrate, but the central portion is easy for the coating liquid to penetrate between the fiber bundles. .. The relay core 14 abuts against the central portion of the coating portion 10, and the liquid in the liquid storage portion 16a is guided by the relay core 14.

The material of the coating portion 10 is not particularly limited, but for example, it is preferable to use a synthetic resin fiber made of a polyester fiber such as a polyamide fiber or PBT (polybutylene terephthalate).

[Liquid derivative 20]
As shown in FIGS. 1 and 2, a tubular liquid derivative 20 is arranged around the coating portion 10 in the toe shaft 12, and the liquid derivative 20 is in contact with the outer periphery of the coating portion 10. Then, the rear part of the liquid derivative 20 is attached to the front part of the collector 18. The relay core 14 is attached to the collector 18, and the tip of the relay core 14 is in contact with the rear end of the coating portion 10. Further, the rear portion of the liquid derivative 20 is fitted into the bowl-shaped tip portion of the collector 18, and the liquid derivative 20 is positioned in the toe shaft 12 by the step portion 18e1 (see FIG. 4) on the front side of the collector 18.

In the embodiment, the liquid derivative 20 is made of a sintered core, but may be another porous material as long as the liquid can flow out. Further, as shown in FIG. 3, the outer peripheral portion of the liquid derivative 20 has a cylindrical rear portion 20a, and the outer peripheral portion from the central portion to the front portion is tapered in a tapered shape. Further, the inner peripheral portion of the liquid derivative 20 is formed to have substantially the same diameter. The flange 10a of the coating portion 10 abuts on the rear end portion of the liquid derivative 20 to prevent the coating portion 10 from coming off from the liquid derivative 20 as shown in FIG.

[Relay core 14]
As shown in FIG. 8, the relay core 14 has a concave portion 14a formed on the peripheral surface of the tip portion thereof, and as shown in FIGS. 1 and 2, when the relay core 14 is fitted into the collector 18, the inner peripheral protrusion (convex portion) of the collector 18 is formed. 18f: see FIG. 4) has a structure in which the recess 14a is fitted and prevented from coming off. The relay core 14 is made of a fiber bundle made of a resin material, a molded core, or the like, and has a structure capable of inducing a liquid by exerting a capillary force.
As the material of the relay core 14, it is preferable that the relay core 14 is made of a material that does not substantially contain formaldehyde, such as an olefin-based elastomer. This is because a material containing formaldehyde may elute formalin from the relay core 14 into the cosmetic liquid, which is inappropriate as a cosmetic tool. Further, as the material of the relay core 14, it is more preferable that the material does not contain acetal-based materials such as polyacetal, phenol resin, urea resin and melamine resin used for adhesives.

[Cosmetics]
The applicator according to the first embodiment is a liquid cosmetic applicator using an appropriate applicator such as a brush tip or a pen core as the applicator portion 10, and the liquid cosmetics contained in the liquid accommodating portion 16a are at least. , Carbon black, water, a dispersant composed of a film-forming resin, 0.5 to 5% by mass, a film-forming agent, 2 to 15% by mass (in terms of solid content), and a surfactant of 0.5% by weight or less. The viscosity can be in the range of 2 to 8 mPa · s at a temperature of 25 ° C. and a shear rate of 3.83S ^-1 by an ELD type viscometer.

The carbon black used for cosmetics is used as a coloring material, and is not particularly limited as long as it is a carbon black normally used as a coloring material for black liquid cosmetics, and various carbon blacks may be used. can.

The content of this carbon black is preferably 1 to 20% by mass, more preferably 5 to 15% by mass, based on the total amount of the liquid cosmetic. If the content of this carbon black is less than 1% by mass, the color is light and insufficient as a cosmetic, while if it exceeds 20% by mass, the viscosity becomes too high and liquid cosmetics such as collector type and batting type. It is not preferable to use the applicator because the liquid is not discharged smoothly.

The dispersant used in the cosmetics is made of a film-forming resin, which improves the dispersibility of carbon black, which is a coloring material, and also functions as a film-forming resin.

The dispersant that can be used in the cosmetics is not particularly limited as long as it has the above functions, and for example, acrylic acid, methacrylic acid or an alkyl ester or derivative thereof, vinyl acetate, vinyl pyrrolidone. Examples thereof include a copolymer composed of one selected from one or more of the above, a betaine-type alkyl acid-based amphoteric resin, and the like, preferably acrylic acid and methacrylic acid from the viewpoint of further dispersion performance of carbon black. Alternatively, one selected from those alkyl esters or derivatives and a polymer of vinyl acetate, a polymer of vinylpyrrolidone and vinyl acetate, acrylic acid, methacrylic acid or one or more of their alkyl esters and octylacrylamide. A copolymer with octylacrylamide is particularly preferable, and more preferably, from the viewpoint of dispersion performance and film forming ability, one or more of acrylic acid, methacrylic acid or alkyl esters thereof and octylacrylamide are used.

The content of these dispersants is preferably 0.5 to 5% by mass, more preferably 2 to 4% by mass, based on the total amount of the liquid cosmetics.

If the content of this dispersant is less than 0.5% by mass, the dispersion stability of carbon black, which is a coloring material, becomes insufficient, while if it is contained in excess of 5% by mass, the viscosity becomes too high and the dispersion stability. No improvement is seen and it is not economical.

The film-forming agent used in the cosmetics is, for example, a copolymer selected from one or more monomers among acrylic acid, methacrylic acid or an alkyl ester or derivative thereof, styrene, and vinyl acetate. Emulsion resin can be mentioned.

In the cosmetic, the dispersant is also made of a film-forming resin, and the difference from the dispersant is that the soluble resin and the emulsion resin are different. The emulsion resin uses a monomer as a polymerization solvent. It is an aqueous suspension obtained by emulsion polymerization in water. In the dispersion of carbon black in the cosmetics, a more stable carbon black dispersion is obtained with the soluble resin than with the emulsion resin. It is used separately in this respect.

The content of the film-forming agent (emulsion resin) is preferably 2 to 15% by mass, more preferably 2 to 10% by mass, based on the total amount of the liquid cosmetic in terms of solid content (resin content). ..

If the content of these film-forming agents (emulsion resin) is less than 2% by mass in terms of solid content (resin content), the water resistance is poor, while it is contained in excess of 15% by mass in terms of solid content (resin content). Then, there may be a problem that the application portion (brush tip, pen core, etc.) of the liquid cosmetic application tool becomes dry and cannot be applied, which is not preferable.

Surfactants may be used to stabilize these film-forming agents (emulsion resins), but the surfactants contained therein have little effect on the adhesiveness of the present invention. The content shall not be considered.

The surfactant used in the liquid cosmetics functions as a dispersion aid with respect to the dispersion of carbon black, and examples thereof include nonionic surfactants, anionic surface active agents, and cationic surfactants, and lecithin. , Polyethylene glycol fatty acid ester, glycerin fatty acid ester, polyglycerin fatty acid ester, polyoxyethylene alkyl ether, polyoxyethylene polyoxypropylene alkyl ether, polyoxyethylene alkyl ether phosphate / phosphate, polyethylene glycol fatty acid ester, alkyl Examples thereof include one or a mixture of two or more kinds such as sulfates, sulfonates, polyoxyethylene alkyl ether sulfates and the like.

The content of these surfactants is preferably 0.5% by mass or less, more preferably 0 to 0.3% by mass, based on the total amount of the liquid cosmetics.

If the content of this surfactant exceeds 0.5% by weight, the water resistance is inferior and sufficient fixing force cannot be obtained, which is not preferable.

The liquid cosmetic uses water (including purified water, distilled water, ion-exchanged water, pure water, ultrapure water, etc.) as a solvent. The content of this water is the balance containing each of the above components and an optional component described later.

Further, the liquid cosmetic may contain optional ingredients and the like used in ordinary liquid cosmetics, in addition to the essential ingredients and the like. Specifically, it contains an appropriate amount of preservatives, antioxidants, neutralizers, ultraviolet absorbers, chelating agents, moisturizers, beauty ingredients, fragrances, viscosity modifiers, etc., as long as the effects of the cosmetics are not impaired. Can be blamed.

The liquid cosmetic has a viscosity in the range of 2 to 8 mPa · s at a temperature of 25 ° C. and a shear rate of 3.83S ^-1 by an ELD type viscometer, and is particularly preferably 3 mPa · s to 6 mPa · s. Is desirable.

If this viscosity value is less than 2 mPa · s, the liquid will flow into wrinkles and cause bleeding, while if it exceeds 8 mPa · s, the viscosity will be high. The liquid cosmetics built into the agent coating tool do not discharge the liquid smoothly, which is not preferable. The viscosity measurement conditions (including the examples described later) are specifically measured at a temperature of 25 ° C. and a shear rate of 3.83 (S ^-1 ) at 1 rpm of an ELD type viscometer standard cone rotor manufactured by Tokimec. Means the value that was set.

According to the coating tool according to the first embodiment, since the coating liquid outflow property is improved by forming a plurality of coating liquid guide grooves 18d in the collector 18, the liquid derivative 20 and the coating portion 10 are formed from the relay core 14. It can have an excellent effect that the liquid can be reliably supplied.

In particular, although the flange portion 10a is formed on the coating portion 10, since the tip portion of the relay core 14 is abutted against the coating portion 10, the dimension does not depend on the outer diameter of the relay core 14, so that the coating portion 10 is downsized. Becomes easier.

9 to 12 are explanatory views of the coating tool according to the second embodiment.

The difference from the coating tool of the first embodiment is that a plurality of grooves for guiding the liquid are formed in the relay core 14 instead of the collector 18, and heavy parts are housed in the rear portion in the shaft body 16. It was.

Specifically, as shown in FIGS. 10 and 11, the collector 18 does not form the coating liquid guide groove as in the coating tool of the first embodiment, but has a flat surface from the tip portion to the inside thereof. It is something that is. Then, as shown in FIG. 12, a plurality of coating liquid guiding grooves 14b extending in the longitudinal direction are formed on the outer periphery of the relay core 14. It is preferable that the width of the coating liquid guiding groove 14b appropriately corresponds to the viscosity of the coating liquid and the capillary force to guide the coating system to the coating portion, but in the embodiment, 0.1 to 0.5 mm is preferable. Further, as the material of the relay core 14, it is preferable that the relay core 14 is formed of an elastomer material that does not contain formaldehyde.
Further, the tip portion 14c of the relay core 14 is expanded in diameter so as to be fitted to the step portion 18e1 on the front side of the collector. The tip portion 14c has a bowl shape, and the rear end of the coating portion 10 is fitted together with the flange 10a in the recessed portion of the tip.

Then, in the coating tool of the second embodiment, the solid body 16c1 housed in the space closed by the tail plug 16c arranged in the rear portion of the partition wall 16b of the shaft body 16 is used as a heavy component. .. By accommodating and fixing the solid body 16c1 of this heavy component to the rear part of the barrel 16 by the tail plug 16c, the center of gravity of the applicator is moved from the center to the rear in the axial direction, so that the usability at the eyeline or the like is improved. (See Fig. 9).

According to the coating tool according to the second embodiment, since the coating liquid outflow property is improved by forming a plurality of coating liquid guiding grooves 14b in the relay core 14, the liquid derivative 20 is coated from the relay core 14. It can exert an excellent effect that the liquid can be reliably supplied to the portion 10.

Further, since the solid body 16c1 of a heavy object is housed in the rear part of the shaft body 16, the weight is balanced and it is easy to apply.

Further, as a liquid cosmetic suitable for the second embodiment, a glass transition point of 20 ° C. or lower obtained by polymerizing monomers selected from an acrylic acid monomer, a methacrylic acid monomer, an acrylic acid ester monomer, and a methacrylic acid ester monomer is formed. A liquid cosmetic containing an aqueous emulsion of an acrylic acid-based polymer, fermented cellulose, a coloring material containing at least a flat pigment, and water. Further, the aqueous emulsion of the acrylic acid-based polymer is 2 to 20% by mass, the fermented cellulose is 0.05 to 0.6% by mass, the at least flat pigment or iron oxide particles, and a coloring material containing a chelating agent. Liquid cosmetics characterized by having a viscosity of 1 to 30% by mass, a temperature of 25 ° C. by an EMD type viscometer, and a viscosity of 30 to 200 mPa · s at a shear rate of 76.6S ^-1 are suitable. According to this second embodiment, an applicator that does not blur on the skin even when applied, has no brilliant color unevenness, has low viscosity with little sagging (dropping), and can draw bright lines deeply. Can be provided.

To describe liquid cosmetics in detail, as an aqueous emulsion of an acrylic acid-based polymer, one or more monomers selected from an acrylic acid monomer, a methacrylic acid monomer, an acrylic acid ester monomer, and a methacrylic acid ester monomer are polymerized with each other. As long as it is an aqueous emulsion having a glass transition point of 20 ° C. or less obtained thereby, various aqueous emulsions can be used without particular limitation.
The aqueous emulsion of the acrylic acid-based polymer used is used as a film-forming agent, and preferably has a glass transition point (Tg) of −20 ° C. or higher to 20 ° C. or higher in terms of film-forming property and elasticity of the film to be formed. It is desirable to use an aqueous emulsion whose temperature is below ℃. If the glass transition point exceeds 20 ° C., the elasticity and film-forming property of the dried cosmetics are lowered, and the makeup retention is lowered, which is not preferable.
In the present invention, the glass transition point (Tg) was measured as follows. First, the resin was made into a lacquer, a lacquer-like resin was formed into a film, and then the solvent was dried to form a film. Using a differential scanning heat analyzer (DSC) manufactured by Rigaku Co., Ltd., the film-formed acrylic resin is heated from -20 ° C to + 150 ° C at a heating rate of 10 ° C / min to measure the differential scanning calorimetry. , The obtained endothermic curve was differentiated to obtain a variable pole point, and this variable pole point was determined to be Tg.

Specific examples of the aqueous emulsion of the acrylic acid-based polymer that can be used include yodsol GH800 (glass transition point: -15 ° C., solid content 45%, manufactured by Axonobel), which is an alkyl acrylate copolymer emulsion, and yodsol GH810F. (Glass transition point: 10 ° C, solid content 46%, manufactured by Axonobel), COVACRYL MS11 (glass transition point: 0 ° C, solid content 57%, manufactured by SENSIENT), which is an alkyl acrylate copolymer emulsion, is used. can.
If necessary, for neutralization, for example, 2-amino-2-methyl-1-propanol, 2-amino-2-methyl-1,3-propanediol, triethanolamine, L-arginine, etc. Ammonia water, sodium hydroxide and the like may be used.
The content of the aqueous emulsion of these acrylic acid-based polymers is 2 to 20% by mass (hereinafter, simply "%") with respect to the total amount of the liquid cosmetic composition in terms of solid content (resin content). It is preferable, more preferably 5 to 15%.
Water resistance can be improved by setting the content of these aqueous emulsions to 2% or more in terms of solid content (resin content), while making it 20% or less in terms of solid content (resin content). As a result, good coating performance can be exhibited without drying the coating portion of the coating tool.
For aqueous emulsions that serve as film-forming agents, surfactants may be used for the purpose of stabilizing these emulsions themselves. The amount of the surfactant added here is not particularly limited because it has little effect on the water resistance and skin adhesion, which are the performances of liquid cosmetics.

The fermented cellulose used in the present invention refers to cellulose produced by cellulose-producing bacteria classified into the genus Acetobacter, the genus Pseudomonas, the genus Agrobacterium, etc. Cellulose fiber obtained from is separated and recovered, and is a fibrous substance that forms a very fine three-dimensional network structure in an aqueous medium.
As the fermented cellulose that can be used, commercially available ones may be used, but acetic acid bacteria such as Acetobacter xylinum and Acetobacter pasturianas are used in a medium containing nutrients such as nitrogen source, carbon source, water and oxygen. Those obtained by culturing may be used. For example, a product prepared by fermenting coconut pulp or juice with the above-mentioned acetic acid bacterium or other cellulose-producing bacterium may be used as the fermented cellulose of the present invention.

The content of these fermented celluloses is preferably 0.05 to 0.6%, more preferably 0.07 to 0.4%, based on the total amount of the liquid cosmetic composition. desirable.
By setting the content of these fermented celluloses to 0.05% or more, sedimentation of the flat pigment can be suppressed and a bright and dense line can be drawn, while by setting it to 0.6% or less. , You can draw a line that is brilliant and has good elongation.

In the present invention, as the coloring material, a coloring material containing at least a flat pigment is used.
Examples of the flat plate pigment used in the present invention include mica titanium, carmine-coated mica titanium, chromium oxide-coated mica titanium, iron oxide-coated mica titanium, iron oxide / carmine-coated mica titanium, iron oxide / navy blue-coated mica titanium, and blue coating. Mica Titanium, Navy Blue Film Mica Titanium, Bengala Film Mica, Bengala Film Mica Titanium, Bengala Carmine Film Mica Titanium, Bengala / Iron Oxide Film Mica Titanium, Bengala / Navy Blue Film Mica Titanium, Bengala / Iron Oxide / Navy Blue Film Mica Titanium, etc. Further, at least one kind (each alone or a mixture of two or more kinds, the same applies hereinafter) such as a glittering pigment coated with a metal or a metal oxide on the base material of glass flakes or lumpy flakes can be mentioned.
Preferred are iron oxide-coated mica titanium, mica titanium, and blue-coated mica titanium, and in particular, iron oxide-coated mica titanium and mica, from the viewpoint of obtaining uniformity and coatability of the coating film and excellent brilliant drawing lines. The use of titanium is desirable.
In these flat pigments, it is preferable that the average particle size is 5 to 100 μm, and more preferably 10 to 60 μm.
By blending these flat pigments with an average particle size and fermented cellulose, high dispersibility can be achieved without aggregation in water, sufficient hue and clogging in the coating tool, and excellent ejection performance. It will be something that can be realized. Here, in the present invention, the "average particle size" is a value obtained from a digital microscope VHX-2000 (manufactured by KEYENCE CORPORATION).
The content of these flat pigments is preferably 1 to 30%, preferably 5 to 25%, based on the total amount of the liquid cosmetic composition, in order to obtain coating performance, use characteristics, and brilliant lines.
By setting the content of this flat pigment to 1% or more, a product having good usability and good coatability with brilliance can be obtained, while from the viewpoint of coating performance, use characteristics, and brilliant line drawing. It is desirable that it is 30% or less.

In the present invention, a pigment other than the flat pigment can be used from the viewpoint of coloring as a liquid cosmetic for eye makeup.
Pigments that can be used include, for example, carbon black, iron oxide particles (black iron oxide particles, yellow iron oxide particles, etc.), titanium oxide, navy blue, ultramarine, blue No. 1, valve handle, chromium oxide, chromium hydroxide, and the like. Zinc oxide, zirconium oxide, cobalt oxide, fish scale foil, bismuth oxychloride, blue 2, blue 404, red 201, red 202, red 220, red 102, red 104, yellow 4, yellow 4 Pigments such as No. Al rake and at least one such as aluminum-coated polyester film can be mentioned.
As will be described later, the content range of this pigment (excluding the flat plate pigment) is adjusted to a suitable amount within the range of the total content of the pigment and the coloring material containing the flat pigment.

The content of the coloring material containing these flat pigments is preferably 1 to 30%, more preferably 5 to 25%, based on the total amount of the liquid cosmetic composition.
If the content of the coloring material containing these flat pigments is less than 1%, the color development is light and insufficient as a cosmetic, while if it exceeds 30%, the viscosity becomes too high and it becomes a liquid cosmetic application tool. When used, the liquid will not be discharged smoothly, which is not preferable.
Color materials such as organic pigments and dyes other than the above pigments used in the liquid cosmetic composition may be used as long as the effects of the present invention are not impaired.

The liquid cosmetic of the present invention uses water (including purified water, distilled water, ion-exchanged water, pure water, ultrapure water, etc.) as a solvent. The content of this water is the balance containing each of the above components and an optional component described later.
Further, the liquid cosmetic of the present invention may contain, in addition to the above-mentioned components, any component used in a normal liquid cosmetic composition. Specifically, the present invention comprises surfactants, pigment dispersants, moisturizers, preservatives, antioxidants, neutralizers, ultraviolet absorbers, chelating agents, moisturizers, beauty ingredients, fragrances, viscosity modifiers, and the like. It can be contained in an appropriate amount as long as the effect of the above is not impaired.

As the surfactant that can be used, for example, any kind of nonionic, cationic or anionic surfactant can be used. Specifically, lecithin, propylene glycol fatty acid ester, glycerin fatty acid ester, polyglycerin fatty acid ester, polyoxyethylene alkyl ether, polyoxyethylene polyoxypropylene alkyl ether, polyoxyethylene alkyl ether phosphoric acid (phosphoric acid ester), polyethylene glycol fatty acid. Examples thereof include ester / alkyl sulfate (sulfonic acid ester) and polyoxyethylene alkyl ether sulfate.
The content of these surfactants is preferably 0.5% or less with respect to the total amount of liquid cosmetics, and if it is contained in excess of 0.5%, the water resistance is inferior and sufficient fixing force is obtained. I can't.

In the present invention, a dispersant can be contained, if necessary, in order to further improve the dispersibility of the pigment.
The dispersant that can be used is not particularly limited, and for example, sodium polyaspartate, behenylpolyoxyethylene ether, alkyl acrylate copolymer, and the like can be used, and these dispersants are used in the total amount of liquid cosmetics. However, it can be contained in an amount of 0.1 to 5%.
Examples of chelating agents that can be used include edetic acid or a salt thereof, ethylenediamine triacetic acid or a salt thereof, gluconic acid or a salt thereof, phytic acid or a salt thereof, pyrophosphate or a salt thereof, polyphosphoric acid or a salt thereof, and metaphosphoric acid. Or a salt thereof, hydroxyethandiphosphonic acid or a salt thereof, citric acid or a salt thereof, tartrate acid, gluconic acid, phytic acid and the like, and these chelating agents are 0.01 to 0.01 to the total amount of liquid cosmetics. It can contain 0.5%.
As the moisturizing agent that can be used, for example, water such as 1,3-butylene glycol, 1,4-butylene glycol, pentylene glycol, ethylene glycol, diethylene glycol, polyethylene glycol, propylene glycol, dipropylene glycol, and glycerin can be used. An appropriate amount of dissolved glycols or the like can be used.

Examples of preservatives that can be used include parabens, sodium dehydroacetate, phenoxyethanol and the like. The preservative of the present invention contains an antibacterial agent, and examples of the parabens as the preservative include methyl paraoxybenzoate, ethyl paraoxybenzoate, propyl paraoxybenzoate, butyl paraoxybenzoate, and paraoxybenzoic acid. An appropriate amount of isopropyl or the like can be used.

From the viewpoint of stability and coatability, the liquid cosmetic has a temperature of 25 ° C. by an EMD type viscometer, a shear rate of 76.6S ^-1 , and a viscosity of 30 to 200 mPa · s (20 rpm).
A more preferable range in the above viscosity range varies depending on the type and use (eyeliner, eye shadow, skin cosmetic, etc.) of the ingredients of the liquid cosmetic, but more preferably 40 to 150 mPa · s. Is desirable.
When this viscosity value is 30 mPa · s or more, a bright and dense line can be drawn, while when it is 200 mPa · s or less, a liquid using a brush or a pen core as the coating means of the present invention. The liquid cosmetics contained in the cosmetic application tool can be smoothly discharged.

In the present invention, the viscosity measurement conditions (including the examples described later) specifically mean the values measured at each shear rate using an EMD type viscometer manufactured by Toki Sangyo Co., Ltd.
More preferably, the viscosity at a temperature of 25 ° C. and a shear rate of 38.3 S ^-1 (10 rpm) is 40 to 350 mPa · s, and the viscosity at a shear rate of 383 s ^-1 (100 rpm) is 20 to 70 mPa · s. desirable.
Further, in order to make the viscosity range, it can be carried out by suitably combining the amounts of each component such as a coloring material containing a flat pigment, water, an aqueous emulsion serving as a film-forming agent, and fermented cellulose.

Further, the liquid cosmetic of the present invention preferably has a surface tension in the range of 25 to 60 mN / m at a temperature of 25 ° C. by the Wilhelmy method (plate method) from the viewpoint of good spreadability at the time of application, which is more preferable. Is preferably in the range of 30 to 45 mN / m. When this surface tension is 25 mN / m or more, there is no bleeding or unevenness in the coated lines, and smooth coating is possible, and when it is 60 mN / m or less, the followability of the coating liquid is improved. Smooth application can be performed.
In the present invention, the surface tension is measured by using a CBVP-Z type tensiometer (plate method) manufactured by Kyowa Surface Chemistry Co., Ltd. and refers to a value obtained at a temperature of 25 ° C.
In addition, in order to make the surface tension within the range, it can be carried out by suitably combining the amounts of each component such as a coloring material containing a flat pigment, water, an aqueous emulsion serving as a film-forming agent, and fermented cellulose.

The present invention is not limited to the above embodiment, and can be modified within the scope of the present invention. For example, the liquid derivative is preferably a porous sintered body, but it can also be a liquid derivative of a resin molded body having a liquid guide groove provided on the inner circumference or the outer circumference along the axial direction.

The applicator of the present invention can be used as a collector-type applicator for a cosmetic container such as an eyeliner or an eyebrow having a brush tip or a pen core as an applicator.

10 Coating part 10a Flange 12 Front shaft 12c Front opening 12d Stepped part 14 Relay core 14a Recessed 16 Shaft body 18 Collector 18a Hollow hole 18c Slit 18d Coating liquid guide groove 18e1 Front step 18e2 Rear step 18f Convex 20 Liquid derivative 22 Interference part

Claims (3)

In a coating tool in which a coating portion is provided in a barrel and the liquid is guided to the coating portion by a relay core.
A tubular liquid derivative is arranged around the coating portion in the barrel, the liquid derivative is in contact with the outer periphery of the coating portion, and a relay core and a collector are mounted from behind the liquid derivative.
A coating tool characterized in that a step portion is formed on the inner peripheral surface of the front end of the collector, and a coating liquid guide groove is formed in the step portion . The coating tool according to claim 1 , wherein a locking portion for locking the rear end of the liquid derivative is formed in the step portion. The coating tool according to claim 1 or 2 , wherein the relay core is made of a material containing no formaldehyde.

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