JP2012231941A - Applicator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an applicator smoothly dispensing an application liquid without clogging a flow path with the liquid inside an application portion to draw beautifully applied line or the like.SOLUTION: The applicator includes an application body provided at the front part of an application liquid-storing case from which the application liquid stored in front of a liquid pressurizing mechanism is dispensed by the liquid pressurizing mechanism, and made of thermoset rubber or thermoset elastomer. The applicator is structured as follows: the application body 30 has a tapered shape; a liquid flow path 31 is formed inside the application body; the application body 30 has an application liquid outflow opening portion 32 and is communicating with the liquid flow path 31 inside the application body; the surface of the application liquid outflow opening portion 32 is almost flat or inclined; an application surface 34 more tapered and having an almost flat part is formed at a part ahead of the surface of the opening portion 32; and a part except for the application surface 34 more tapered and having an almost flat part formed at a part ahead of the surface of the application liquid outflow opening portion 32 has the liquid flow path having a shape almost analogous to the external-diameter shape of the application body.

Description

  The present invention provides an applicator that can smoothly dispense a coating liquid such as ink or liquid cosmetics, particularly a coating liquid containing giant particles, without clogging the flow path in the coating section and draw a beautiful coating line. About.

  Conventionally, when using an applicator containing a coating liquid such as liquid cosmetics and using it on the eyes, a line may not be drawn well. As a solution, it is possible to draw a line by simply reducing the size of each part, but the usability and the like are deteriorated.

As a typical technique of a conventional applicator, for example, 1) a liquid pressing unit that pressurizes the coating liquid inside the main body is provided, and the coating liquid is supplied to the tip application body by the pressure of the liquid pressing unit. In the applicator characterized in that the applicator is spread over a wide range such as the skin and the oral cavity, the applicator is made of an elastic material, and a communication path that communicates with the inside and outside of the main body is formed. When the coating liquid is closed by elasticity and the coating liquid is pressurized by the liquid pressing means, the communication path has a valve mechanism that can be elastically deformed and opened. An applicator characterized by a slit-shaped discharge port facing the passage (see, for example, Patent Document 1), 2) In a viscous cosmetic containing a viscous cosmetic in an extrudable container that can be returned to the contents, Made of elastic material, the application surface is It is a flat inclined surface inclined with respect to the longitudinal axis of the container body, and the cylindrical viscous cosmetic supply pipe of the container has a diameter of 1.7 to 2.2 mm. A discharge port for discharging outward is provided on the coating surface in an open state, and the viscous cosmetic has a viscosity of 19000 mPa · s or more at a shear rate of 0 to 5 sec ⁻¹ and a shear rate of 40 sec ⁻¹ . Viscous cosmetics having a viscosity of 11000 mPa · s or less and further containing dipropylene glycol at 0.2 wt% or more (see, for example, Patent Document 2) are known.

  3) In order to provide a liquid applicator that can be easily applied over a wide range such as the skin or the oral cavity even with a high-viscosity application liquid, the liquid applicator is a liquid that pressurizes the application liquid inside the main body. A pressing mechanism (liquid pressing means) is provided, and the coating liquid is supplied to the application body by pressing of the liquid pressing mechanism. The application body is made of an elastic material made of rubber, elastomer, or a closed cell body having resilience. A communication passage comprising a through hole communicating with the inside and outside of the main body is formed, and the application portion of the application body is provided to protrude further from the slit-like discharge port of the communication passage to the tip. (For example, refer to Patent Document 3) 4) In order to provide a liquid applicator in which the hardness and bending elastic force of the applicator body are appropriate and the applicability is uniform without uneven coating, the liquid applicator is applied inside the main body. Liquid pressurizing mechanism for pressurizing liquid In the liquid applicator provided with a liquid pressing means and supplying the application liquid to the application body at the tip of the main body by pressing the liquid pressurizing mechanism, the application body is made of an elastic material and is provided inside and outside the main body. A communicating passage is formed, and an application portion is provided so as to protrude further from the discharge port of the communication passage to the tip. The application portion has a vertical repulsive force of 0.3 (mm) from the tip. A liquid applicator that is 01 to 1.40 (N) (see, for example, Patent Document 4) is known.

However, in the applicators of Patent Documents 1 to 4 described above, if a cosmetic containing a large particle size, for example, a large particle size glittering material is incorporated in the applicator, the application unit is clogged and repeatedly used. And that trend may be even greater. Moreover, when a coating part is a brush, at the time of repeated use, a big particle is filtered between brush fibers, a particle | grain accumulates in the liquid flow path inside a brush, and a malfunction may arise.
Patent Documents 3 and 4 are techniques similar to the invention of the present application, but the shape and structure of the coated surface described in Patent Documents 3 and 4 still cannot draw a line well when used for the eyes. There is a current situation.

International Publication WO2006 / 049283 (Claims, Examples, etc.) JP 2007-319392 A (Claims, Examples, etc.) JP 2007-130157 A (Claims, Examples, etc.) JP 2007-236529 A (Claims, Examples, etc.)

  The present invention has been made in view of the above-mentioned problems of the prior art and the current situation, and is intended to solve this problem. Even in the case of a coating liquid such as ink or liquid cosmetic containing a large particle size glittering material or the like, An object of the present invention is to provide an unprecedented applicator that can be smoothly ejected without clogging on the road and can draw a beautiful application line even in a thin application part such as the eyes.

  As a result of intensive studies on the above-described conventional problems, the present invention is applied by a specific material provided in front of a coating liquid built-in container that discharges the coating liquid built in front of the liquid pressing mechanism by the liquid pressing mechanism. An applicator having a body, wherein the shape of the applicator is a specific shape, the surface of the applicator opening is a surface of a specific shape, and the front surface of the applicator further has a substantially flat portion further tapered. The above-mentioned applicator can be obtained by having a liquid flow passage having a specific shape, except for a portion having a surface, and a portion excluding the application surface having a substantially flat portion that is further tapered from the surface of the opening. The headline and the present invention have been completed.

That is, the present invention resides in the following (1) to (6).
(1) An applicator having an application body formed of a thermoplastic rubber or a thermoplastic elastomer provided in front of a coating liquid built-in container for discharging a coating liquid built in front of the liquid pressing mechanism by a liquid pressing mechanism. The application body has a tapered shape, forms a liquid flow passage inside the application body, the application body has one application liquid outflow opening, and communicates with the liquid flow passage inside the application body. In addition, the surface of the opening is a substantially flat surface or an inclined surface, and further includes a coating surface having a substantially flat surface portion that is further tapered ahead of the surface of the opening portion, and a substantially flat surface portion that is further tapered ahead of the surface of the opening portion. The applicator is characterized in that the portion excluding the application surface having a liquid flow passage substantially similar to the outer diameter shape.
(2) When the front end of the coating surface having the substantially flat portion I that is further tapered toward the front side of the opening A is bent by 2 mm, the opening A and the bottom of the liquid flow path below the opening A The following formula (I) is satisfied, where the distance is a and the distance between the opening A before being bent and the bottom of the liquid flow path below the opening A is b. Applicator.
a / b <0.9 (I)
(3) When the cross-sectional area of the liquid flow passage inside the application body is B, the cross-sectional area of the liquid flow passage joined to the opening A is C, and the area of the opening A is S, the following formula (II) The applicator according to (1) or (2) above, wherein all of (IV) to (IV) are satisfied.
1.5 mm ² <B <3.0 mm ² ......... (II)
0.5 mm ² <C <B (……) (III)
0.6 mm ² <S <2.0 mm ² ......... (IV)
(4) The ratio when the sum of the cross-sectional area B of the liquid flow passage and the cross-sectional area C of the liquid flow passage is divided by the distance D between the liquid flow passages BC satisfies the following formula (V): The applicator according to (3) above.
(B + C) / D> 0.5 (V)
The applicator according to any one of claims 1 to 3, wherein the applicator is used.
(5) The ratio of the outer diameter volume Y of the application body and the volume X of the substantially similar liquid flow passage in the portion excluding the application surface having the substantially flat surface portion I that is further tapered ahead of the surface of the opening A. Satisfy | fills following formula (VI), The applicator as described in any one of said (1)-(4) characterized by the above-mentioned.
X / Y> 0.4 ......... (VI)
(6) The coating solution is a glycerin derivative having a pigment and a film-forming resin of 0.5 to 5% by mass, a film-forming agent of 2 to 15% by mass (in terms of solid content), and a molecular weight of 200 to 4300. 3 to 15% by mass and water, and the viscosity (25 ° C.) at a shear rate of 76.8S ⁻¹ in an EMD viscometer is in the range of 20 to 250 mPa · s ( The applicator according to any one of 1) to (5).

According to the present invention, the clogged surface of the application body, the outer diameter size is reduced by holding the application liquid such as a small amount of cosmetics in the application liquid outflow opening without causing clogging in the liquid flow passage in the application body. Even so, since the size of the application body is small and the width of the application surface arranged at the tip of the opening can be narrowed, an applicator that can easily draw a thin application line is provided.
According to the second aspect of the present invention, there is provided an applicator that can easily draw a thin application line by smoothly discharging even a coating liquid containing giant particles without clogging in the flow passage in the application body. The
In the applicator according to the third to fifth aspects of the present invention, the internal space is larger than the size of the outer shape of the applicator, and by forming the applicator within this range, the flow path is further secured and the deformability is maintained. Therefore, it is possible to provide an applicator capable of easily drawing a thin application line by smoothly discharging without clogging the liquid flow path in the application body.
In the applicator according to the sixth aspect of the present invention, clogging of the coating liquid containing the pigment inside the coated body can be further prevented.

It is explanatory drawing of the whole cross section of the applicator which concerns on the 1st Embodiment of this invention. It is explanatory drawing of the application body in the applicator of FIG. 1, Comprising: (a) is a top view of an application body, (b) is sectional drawing of an application body. (A) is explanatory drawing of the partial cross-sectional aspect of an application body at the time of bending 2 mm from the front-end | tip of the application surface in an application body, (b) and (c) are for describing the shape and structure of an application body in detail. It is each explanatory drawing shown in a plane aspect and a cross-sectional aspect. It is explanatory drawing of the whole cross section of the applicator at the time of setting the liquid pressing mechanism of the applicator of this invention as other embodiment. It is explanatory drawing of the whole cross section of the seal part at the time of making the seal part of the applicator of this invention into other embodiment. It is a component figure of the application body of Example 1, a top view, (b) is sectional drawing. It is a component figure of the application body of Example 2, a top view, (b) is sectional drawing. It is a component figure of the application body of Example 3, a top view, (b) is sectional drawing. It is a component figure of the application body of the comparative example 1, a top view, (b) is sectional drawing. It is a component figure of the application body of the comparative example 2, a top view, (b) is sectional drawing. It is a component figure of the application body of the comparative example 3, a top view, (b) is sectional drawing.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is an explanatory view of the entire cross section of the applicator according to the first embodiment of the present invention, FIG. 2 is an explanatory view of the applicator of the applicator of FIG. 1, and FIG. A top view and (b) are sectional views of an application object.
The applicator according to the first embodiment of the present invention is an applicator in which the liquid pressing mechanism is a rotary feeding type, and is built in front of the liquid pressing mechanism 10 by the liquid pressing mechanism 10 as shown in FIG. The coating body formed of thermoplastic rubber or thermoplastic elastomer provided in front of the coating liquid-containing container 11 serving as a reservoir for discharging the applied coating liquid (in this embodiment, “liquid cosmetic”, hereinafter the same) 30.
The liquid pressing mechanism 10 is applied by feeding the coating liquid in the container (reservoir) 11 by rotating the feeding member 13 disposed at the rear end of the shaft body 12 relative to the shaft body 12 in the circumferential direction. It is configured to be supplied to the body 30.

  The liquid pressing mechanism 10 of the applicator A includes a feeding member 13 that is rotatably fitted to the rear end of the shaft body 12, and a drive cylinder 15 that transmits the rotational force of the feeding member 13 by the user to the screw rod 14. A screw body 16 fixed to the shaft main body 12 and screwed with the screw rod 14, a screw rod 14 with a piston body 17 rotatably engaged at the tip, and a piston sliding in the storage portion 11 of the shaft main body 12. And a body 17. The rotation of the feeding member 13 is transmitted to the screw rod 14 via the drive cylinder 15, and the screw rod 14 and the piston body 17 are advanced by the rotation of the screw rod 14 via the female screw of the nut-like screw body 16. The coating liquid is fed from the storage unit 11 to the coating body 30.

As shown in FIG. 1, the feeding member 13 is configured such that a cylindrical operation portion closed by fitting the crown 13 a at the rear end is rotatably fitted and exposed at the rear end portion of the shaft body 12. It is what. The drive cylinder 15 is fitted into the feeding member 13 and fixed in the rotational direction, and the screw body 16 is mounted in the drive cylinder 15 so as to be fixed in the rotational direction and relatively movable in the axial direction (the screw body does not move). Has been. Reference numeral 13b denotes a spring member that urges the feeding member 13 serving as a rotating body to the rear (a member called a cam body below the arrow 10 in FIG. 1 is urged forward).
In the applicator A, the seal portion 18, the joint member 19, the tip shaft 20, and the applicator 30 are attached to the front end portion 12 a of the shaft body 12 by fitting. The storage portion 11 of the shaft main body 12 stores the coating liquid, and the coating liquid drawn from the storage portion 11 passes through the flow path in the joint member 19 and is discharged onto the coating body 30 to be applied. Further, the cap 40 is formed so that it can be attached (fitted) to the front shaft 20 so as to cover the application body 30 and the front shaft 20 after use.

Moreover, in FIG. 1, the code | symbol 21 is a stirring ball which stirs the coating liquid in the storage part 11 by reciprocation, and 22 is a seal ball. Reference numeral 41 denotes an inner cap in the cap 40, and reference numeral 42 denotes a spring for biasing the inner cap rearward.
Further, the reference numeral 23 designates the front shaft 20 in order to position the seal portion 18, the joint member 19, the front shaft 20, and the coating body 30 at a position where the flow path of the coating liquid toward the coating body 30 when not in use is closed. This is a stopper in which a ring-shaped portion is mounted between the rear end and the front surface of the stepped portion of the front end portion 12a of the shaft body 12. In this stopper 23, a part of the ring-shaped part is cut off, a knob piece is integrally formed on the opposite side of the cut-off part, and by pulling the knob piece, the ring-shaped part expands from the cut-off part and the diameter is increased. It can be removed from between the rear end of the front shaft 20 and the front end portion 12 a of the shaft body 12.

  As shown in FIG. 1, when not in use, the seal ball 22 is fitted and sealed in the inner diameter portion of the seal portion 18 serving as a seal ball receiving portion, so that the application liquid does not flow into the application body 30 side. . On the other hand, in use, the user pulls out the stopper 23 from the shaft main body 12 and pushes the front shaft 20 toward the rear end, so that the rear end narrow diameter portion of the joint member 19 abuts against the seal ball 22 and the seal ball 22 is sealed. It is removed from the inner diameter part of the part 18 and enters the storage part 11, and the coating liquid in the storage part 11 flows into the liquid flow path of the application body 30 from the inner diameter part of the joint member 19 and enters the application body 30. It is supplied from the inside and can be applied to the target part.

  As shown in FIGS. 2A and 2B, the application body 30 according to the present invention has a tapered shape, and a liquid flow path 31 is formed inside the application body 30. It has a liquid outflow opening 32 (in this embodiment, an opening having an elliptical shape in plan view), communicates with the liquid flow passage 31 inside the application body 30, and the surface of the opening 32 is substantially flat or inclined (present) (Approx. Flat in the embodiment) 33, the application surface 34 having a further tapered substantially flat portion is provided further ahead of the surface of the opening 32, and the application surface 34 having a further tapered substantially flat portion further than the surface of the opening 32. The portion excluding “” has a liquid flow passage 31 a that is substantially similar to the outer diameter shape. The application body 30 is fitted into the front shaft 20, and the rear flange portion 35 is sandwiched and fixed between the rear step portion 20 a of the front shaft 20 and the distal end portion 19 a of the joint member 19.

In this application body 30, it is preferable that the tip of the application surface 34 having a substantially flat portion I that is further tapered toward the front side of the opening 32 is 2 mm as shown in FIGS. 3 (a) and 3 (b). When bent, the distance between the opening A (32 in the figure, the same applies below) and the bottom of the liquid flow passage 31b at the lower part of the opening A is a, and the opening A before the bending and the lower part of the opening A are bent. When the distance from the bottom of the liquid flow passage is b, it is desirable to satisfy the following formula (I).
a / b <0.9 (I)
In the above formula (I), when the tip of the coating surface 34 having a further tapered and substantially flat surface portion I is further bent from the surface of the opening A, the liquid flow path bottom surface 31b below the opening A is opened. It is an expression showing the relationship of the length approaching A, and more preferably 0.5 ≦ a / b <0.9.

By satisfy | filling said Formula (I), clogging with the flow path 31a inside the application body of a coating liquid can be prevented. In particular, the effect can be exhibited when unused for a long period of time.
The technical significance of the above formula (I) will be described in further detail. When the tip of the coating surface 34 having a substantially tapered portion and a flat surface portion I is further deflected from the surface of the opening A on the fulcrum [FIG. )]], A bending point is generated near the lower portion of the opening A, and the liquid flow path bottom surface 31b below the opening A approaches the opening. More specifically, the liquid flow passage 31c below the opening A is formed with a slope in the direction of the tapered application surface I from the lower portion of the opening A on the coating liquid built-in side, and the angle (α) is 160 ° to 175. It is preferable to be °.
When this applicator is used, a bending point is likely to occur near the beginning of the slope at the time of application, and as a result, a bending point is generated near the lower portion of the opening A, and a liquid flow path below the opening A. When the bottom surface 31b approaches the opening A, the coating liquid held in the liquid flow path 31c flows out from the opening A and is added to the first hemispherical coating liquid to supply the next coating liquid. By doing so, the coating line can be drawn longer.
When the coating liquid contains large particles of 150 μm to 300 μm, such as glitter pigment particles, the bottom surface of the lower portion of the opening A is easily deformed, and the liquid flow path bottom surface 31b below the opening A is easily deformed. Is close to the opening A, so that the effect of reducing the accumulation of large particles is obtained. Furthermore, when the application is repeated again on the part where the coating liquid containing large particles is applied, the bottom surface 31b of the liquid flow path below the opening A is close to the opening A. Entrainment can be prevented.

Furthermore, while satisfy | filling said Formula (I), as shown in FIG.3 (b), let the cross-sectional area of the liquid flow path inside the application body 30 be B, and let the liquid flow path cross-sectional area joined to the opening part A be C. When the area of the opening A is S, it is preferable to satisfy all of the following formulas (II) to (IV).
1.5 mm ² <B <3.0 mm ² ......... (II)
0.5 mm ² <C <B (……) (III)
0.6 mm ² <S <2.0 mm ² ......... (IV)
Furthermore, by satisfying all of the above formulas (II) to (IV), a beautiful thin coating line can be drawn, and the internal space is large compared with the size of the outer shape of the coated body. By forming the application body 30 in the range, the securing of the flow path and the deformability can be effectively maintained, and the effects of the present invention can be further exhibited.

More specifically, when all of the above formulas (II) to (IV) are satisfied, the coating liquid discharged from the opening A flows out into a substantially hemispherical shape, and the hemispherical coating liquid is discharged from the surface of the opening. When the tip end of the coating surface having a further tapered substantially flat portion is moved to the opening side direction starting from the tip of the coating surface, the coating surface 34 having a further tapered substantially flat portion I is further ahead of the surface of the opening A. Move in a necessary and sufficient state. As a result, a beautiful thin coating line can be drawn. In addition, the starting point for drawing the coating line is further tapered toward the tip of the substantially flat surface portion I beyond the surface of the opening A, so that the starting coating line can be easily drawn. A more preferable state can be obtained by further providing a groove or the like in the substantially planar portion I that is further tapered from the surface of the opening A.
Further, the liquid flow path bottom surface 31b below the opening A has an effect of causing the opening A to approach the opening A, and a wide surface is applied. As in the prior art, the liquid flow passage bottom 31b is disposed ahead of the surface of the opening A. If the ratio between the length H of the applied surface and the long diameter G of the opening is out of the preferable range of 0.7 <(H / G) <1.6, for example, it is disposed ahead of the surface of the opening A. Only the coating surface bends and loses the effect of allowing the bottom of the liquid flow path below the opening A to approach the opening A. In this case, the operation of forming the coating line, running out of the coating liquid again from the opening A, becomes necessary and complicated. In addition, when the coating liquid contains large particles, the effect of making the liquid flow path bottom surface 31b below the opening A approach the opening A is lost, so that large particles are easily deposited in the opening A. In the case of repeated use, problems may occur, but these problems can be solved by satisfying all of the above formulas (II) to (IV).
Further, in order to simply discharge, if a large amount of liquid is set and the opening A is designed to be large, the problem of deposition of large particles when the supply amount of the coating liquid and large particles of the coating liquid are included may be avoided. Although there is a possibility that it can be obtained, problems such as the application line etc. can not be drawn, a large amount adheres, the starting point of the application line is not known, and when performing makeup operation etc. looking at the mirror, it may be hidden behind the application tool However, when all of the above formulas (II) to (IV) are satisfied, these problems are also solved. Furthermore, by making the length H of the coating surface thin (the thickness F of the coating surface is, for example, 0.5 to 1.2 mm), the length of the coating surface before the opening A is short, and the opening By adopting a structure in which a bending point is likely to occur near the lower part of the liquid, the lower part of the liquid flow path near the cross section C is easily deformed, and the liquid is easily applied.

In the present invention, the following formula (V) is further obtained in the ratio when the sum of the liquid flow passage cross-sectional area B and the liquid flow passage cross-sectional area C of the application body 30 is divided by the distance D between the liquid flow passages BC. It is preferable to satisfy [see FIG. 3 (b)].
(B + C) / D> 0.5 (V)
Furthermore, the outer diameter volume Y of the portion excluding the coating surface 34 having the substantially flat portion I which is further tapered from the front shaft 20 to the discharge portion in the discharge portion, and the liquid flow passage having a substantially similar shape. It is preferable that the ratio of the volume X satisfies the following formula (VI) (see FIG. 3B).
X / Y> 0.4 ......... (VI)
By satisfying the above formula (V) and / or formula (VI), the internal space can be further increased compared to the size of the outer shape of the coated body, and these ranges [the above formula (V) and / or formula ( VI), and further, by forming the coated body 30 with the above formula (V) and / or formula (VI) including the above formulas (II) to (IV)], further securing of the flow path and synergisticity are achieved. And effectively, the effects of the present invention can be further exhibited.

The coated body 30 having the above structural characteristics can be integrally formed by using a material such as a styrene-based, ester-based, urethane-based thermoplastic rubber, thermoplastic elastomer or the like.
Preferably, from the viewpoint of moldability, applicability, usability, and the like, it is desirable to use a styrene-based elastomer. Further, in order to improve applicability and operability, if the hardness of the applied body is too soft, the above thermoplasticity A blended resin such as PP, PE, TPU, or PBT so that the durometer A hardness is 70 or more may be used for an elastomer or the like.

As the coating liquid used in the applicator of the present invention, various coating liquids can be used depending on the form of the applicator, and for example, ink for writing instruments, liquid cosmetics, and the like can be used.
The coating liquid of this embodiment is used as a liquid cosmetic as described above. As a blending composition of the liquid cosmetic suitable for the applicator of the present invention, 0.5 to 5% by mass of a dispersant composed of a pigment and a film-forming resin, and 2 to 15% by mass of the film-forming agent (in terms of solid content) And a glycerin derivative having a molecular weight of 200 to 4300 and water, and a viscosity (25 ° C.) at a shear rate of 76.8S ⁻¹ in an EMD type viscometer is in the range of 20 to 250 mPa · s. Are preferred.
This cosmetic is a liquid cosmetic suitable for water-based eye makeup cosmetics having excellent water resistance, friction resistance, non-drying properties, and excellent reversion when the coated part is dried. It is.

The pigment to be used is used as a coloring material and is not particularly limited as long as it is normally used as a pigment for liquid cosmetics, and inorganic pigments, organic pigments, and the like can be used. For example, black iron oxide, yellow iron oxide, chromium oxide, ultramarine, bitumen, zinc oxide, aluminum oxide, silicon dioxide, titanium oxide, magnesium oxide, chromium hydroxide, calcium carbonate, titanium yellow, bengara, and titanium dioxide coated flakes Pearl pigments (high brightness particles), laminated film powder, blue No. 1 Al lake, red No. 205, blue blue No. 226, etc. Examples thereof include at least one selected from organic pigments such as No. 228 and Blue No. 404 (each alone or a mixture of two or more). In the applicator of the present invention, the effect of the present invention can be exhibited even when the pigment contains large particles such as a pearl pigment (high-brightness particles) having a particle diameter of 150 μm to 300 μm. In addition, the “particle diameter” in the present invention (including examples and the like) is a value based on the average particle diameter of the measurement result of an arbitrary portion of n = 20 or more observed with a microscope.
The content of these pigments is 1 to 20% by mass with respect to the total amount of the liquid cosmetic from the viewpoints of color developability, suitable viscosity, and smooth dischargeability in the liquid cosmetic applicator having an application part. Hereinafter, it is simply referred to as “%”), more preferably 1 to 10%.

The dispersant composed of the film-forming resin used improves the dispersibility of the pigment and also functions as a film-forming resin.
As a dispersing agent consisting of a film-forming resin that can be used, for example, one or two or more selected from acrylic acid, methacrylic acid or alkyl esters thereof (1 to 4 carbon atoms and 8 carbon atoms). A homopolymer or copolymer using the above compound as a raw material monomer is used. Preferably, the homopolymer or copolymer has an acidic residue as a side chain in the repeating structure, and is preferably an acrylic resin or alkyl acrylate copolymer that can be dissolved in water by neutralization. .
As a particularly preferred alkyl acrylate copolymer, a copolymer of tert-butyl acrylate, ethyl acrylate and methacrylic acid is exemplified, and commercially available products include Luvimer 100P (manufactured by BASF).
The content of the dispersant composed of these film-forming resins is preferably 0.5 to 5%, more preferably 2 to 4% with respect to the total amount of the cosmetic from the viewpoint of improving the dispersion stability of the pigment. is there.

The film forming agent to be used is selected from acrylic acid, methacrylic acid or their (carbon number 1 to 4, carbon number 6, 8, 10, 12) alkyl ester, and two or more of styrene and diacetone acrylamide. Examples include copolymers using compounds as raw materials, or emulsions of copolymers (water suspensions obtained by emulsion polymerization in water using a monomer as a polymerization solvent). A plus size L-53P (manufactured by Ogaku Kogyo Co., Ltd.), which is an amine solution, may be mentioned.
The content of these film forming agents is preferably 2 to 15% with respect to the total amount of the cosmetic in terms of solid content, from the viewpoint of improving the effects of water resistance and friction resistance.

The glycerin derivative having a molecular weight of 200 to 4300 is used when softening (plasticizing) the dried film-forming resin to improve the non-dry property while maintaining water resistance and friction resistance, and when the coated part is dried. For example, polyglycerin, polyoxyalkylene glyceryl ether, polyoxyalkylene diglyceryl ether, and the like can be used.
As polyglycerin, triglycerin, tetraglycerin, hexaglycerin, decaglycerin, and the like can be used. As polyoxyalkylene glyceryl ether, polyoxyethylene glyceryl ether, polyoxypropylene diglyceryl ether, and the like can be used. Particularly preferred are polyoxypropylene glyceryl ether and polyoxypropylene diglyceryl ether.
The content of these glycerin derivatives sufficiently exerts the lubricity effect, and when filled in the applicator, further improves the flowability of the pigment particles in the opening of the applicator of the present invention and the flow path in the applicator. While improving, there is no feeling of stickiness and 3 to 15% and 4 to 10% are preferable with respect to the total amount of cosmetics from the point of improvement of drying property.
Other ingredients that can be used include chelating agents, humectants, thickeners (natural polysaccharides such as xanthan gum), water-soluble polymers, surfactants, preservatives that are commonly used in liquid cosmetics. , Antioxidants, pH adjusters, ultraviolet absorbers, fragrances and the like, and the remainder is prepared with water such as purified water or ion-exchanged water.
Furthermore, in this liquid cosmetic, from the viewpoints of pigment sedimentation control, redispersibility, and coating performance, the viscosity range at an EMD viscometer, 25 ° C., standard cone rotor 20 rpm, shear rate 76.8 s ⁻¹ The liquid cosmetic is 20 to 250 mPa · s, preferably 20 to 200 mPa · s. In addition, the viscosity measuring method of the liquid cosmetics used as the coating liquid used in the present invention is an EMD type viscometer (manufactured by Toki Sangyo Co., Ltd.), 25 ° C., standard cone rotor 20 rpm, shear using the obtained liquid cosmetics. The viscosity at a speed of 76.8 s ⁻¹ is measured.

In the applicator configured in this way, the clogging in the flow path in the applicator part is carried out smoothly and the application liquid outflow opening holds a small amount of the application liquid such as cosmetics, and the tapered application surface, Even with the outer diameter, the size of the application body is small, and the width of the application surface disposed at the tip of the application liquid outflow opening can be reduced, so that a thin application line can be easily drawn.
In particular, in the application body 30, an application body satisfying the above formula (I) was used when bent by 2 mm starting from the tip of the application surface 34 having the substantially flat portion I that is tapered from the surface of the opening 32. In this case, if the tip of the coating surface having a substantially flat portion that is further tapered toward the fulcrum is deflected from the surface of the opening, a bending point is generated near the bottom of the opening, and the liquid at the bottom of the opening The bottom surface of the flow path approaches the opening, and at the time of application, a bending point is likely to occur near the beginning of the slope in the previous period. With this action, a bending point is generated near the lower part of the opening A. As the bottom of the liquid flow passage approaches the opening A, the cosmetic material retained in the liquid flow channel flows out from the opening A and is added to the first hemispherical cosmetic material to supply the cosmetic material. If possible, the line can be drawn longer, even if it contains large particles, The bottom surface of the lower part of the mouth A is easily deformed, and the bottom of the liquid flow passage at the lower part of the opening A approaches the opening A, so that the effect of reducing the accumulation of large particles can be obtained. Even when the coating is repeated again on the portion where the coating material is applied, the bottom of the liquid flow path below the opening A is close to the opening A, so that large particles can be prevented from being caught in the opening A. .

The applicator of the present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the spirit of the present invention.
Since the applicator of the present invention is characterized by the shape, structure, etc. of the applicator 30, other configurations can be appropriately employed for other configurations.
For example, in the above embodiment, the liquid eye liner and the liquid eye shadow applicator have been described as examples of the applicator, but the present invention is not limited to this, and the eyebrow applicator that draws a line on the eyebrows and the line on the skin. In addition to the above, the application liquid may be a writing instrument Western ink and may be a writing instrument that can draw a thin line.
Further, the chamfering process of the opening 32 of the application body 30 and the peripheral surface of the application surface 34 may be performed, respectively.
Further, as the liquid pressing mechanism of the applicator of the above embodiment, the applicator that is a rotary feed type shown in FIG. 1 is used. For example, the applicator that is a knock feed type shown in FIG. 4 is used. Is also good.

FIG. 4 is an explanatory view of a knock-type feeding type applicator. In FIG. 4, the same parts as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.
As shown in FIG. 4, the knock-type feeding type applicator according to this embodiment is applied in the storage portion 11 by pressing the knock member 50 disposed at the rear end portion of the shaft body 12 forward in the axial direction. A knock mechanism 60 that converts the pressure of the knocking member 50 by a user's knocking operation into a rotational force by a cam mechanism, and a screw body 61 fixed to the shaft main body 12. The screw rod 62 is screwed into the screw body 61, and the screw rod 62 is rotated by the rotational force converted by the knock mechanism 60 to advance the screw rod 62 through the screw body 61. Then, the coating solution is fed out. Further, the knock mechanism 60 that converts the force generated by the pressing of the knock member 50 into the rotational force includes a rotating body 63 having first and second cam surfaces, a screw body 61 having a first fixed cam surface, The cam body 65 having two fixed cam surfaces is a main component.

  When the knock type feeding type applicator presses the knock member 50 in the axial direction and starts knocking, the knock member 50 and the rotating body 63 start moving forward integrally while compressing the spring member 64, When knocking continues, the rotating body 63 moves forward while rotating in a predetermined direction. At this time, since the rotating body 63 is rotatably attached to the knock member 50, the knock member 50 itself does not rotate. Along with the rotation of the rotating body 63 at the time of knocking, the screw rod 62 that is regulated in the rotating direction and freely movable in the axial direction rotates together with the rotating body 63. Since the screw rod 62 is screwed with the screw body 61, the screw rod 62 moves forward together with the piston body 66 and feeds the coating liquid in the storage portion 11. The knock is released from this state. The spring member 64 disposed in the screw body 61 releases the knock by pushing up the rotating body 63. At this time, the rotating body 63 starts to rotate and move backward in a predetermined rotation direction. When the knock release is further continued, the rotating body 63 also moves backward while rotating by the pushing force of the spring member 64. Also during this rotation, the screw rod 62 is rotated as described above to move forward with the piston body 66, and the coating liquid is fed out. By repeating the above knocking operation, the axial knocking and releasing operations are converted into rotational force, and the coating liquid can be dispensed quantitatively by rotating the screw rod 62 and pushing out the piston body 66. It becomes.

Furthermore, in the applicator of each of the embodiments shown in FIGS. 1 and 4, the joint member 19 is sealed by using the seal ball 22 for the seal 18 serving as the seal ball receiving portion. It is not limited to. For example, as shown in FIG. 5, an annular thin film 18 a serving as a sealing member can be integrally provided in the seal portion 18 to replace the seal ball 22.
In this form, when not in use, the annular thin film 18a seals the liquid flow path inside the seal portion 18 so that the application liquid does not flow into the application body 30 side. On the other hand, at the time of use, as in the first embodiment, the user pulls out the stopper 23 from the shaft body 12 and pushes the front shaft 20 toward the rear end, so that the rear end narrow diameter portion of the joint member 19 is an annular thin film. The annular thin film 18a is partly removed from the inner diameter portion of the seal ball receiving portion 18 by a notch groove (cross-sectional V-shaped groove) 18b formed in the outer peripheral shape of the annular thin film 18a by striking the 18a, and the coating liquid in the storage portion 11 Flows into the liquid flow path of the application body 30 from the inner diameter portion of the joint member 19 and is supplied from the inside to the application body 30 so that it can be applied to the target portion.

  Moreover, in the application body 30 which satisfy | fills at least 1 of said Formula (I), (II)-(IV) and (V), as shown in FIG.3 (b) from the point which exhibits the effect of this invention further. Further, it is preferable that the distance D from the liquid flow path B inside the application body to the liquid flow path C joined to the opening A is 0 mm <D <5 mm, and the taper is further tapered toward the end of the surface of the opening A. The tip of the coating surface having the substantially flat surface portion I is preferably 0.8 mm <E <1.6 mm in the width E of the tip when viewed from the opening.

  EXAMPLES Next, although an Example and a comparative example demonstrate this invention further in detail, this invention is not limited to the following Example etc.

(Examples 1-3 and Comparative Examples 1-3)
Application of Examples 1 to 3 and Comparative Examples 1 to 3 having the formula (I), formulas (II) to (IV) and formula (V) shown in Table 1 below, and the shapes and dimensions shown in FIGS. Each application tool (product) conforming to FIG. 1 was prepared using a coating solution having the composition shown in Table 2 below (Composition Example 1, filling amount: 1.4 ml). Each evaluation of the ease of writing and clogging of the coated body was performed. These results are shown in Table 3 below. In addition, each said application body is integrally molded by the shaping | molding method using the styrene-type elastomer (the product name "actimer" by Riken Technos Co., Ltd.).

(Eyeline writeability evaluation method)
The applicability was evaluated by a sensory three-step evaluation with a product filled with a coating solution as a test solution from 20 arbitrary monitors.
(Evaluation method for clogging)
The obtained coating solution was stored in a constant temperature layer at a temperature of 50 ° C. and 0%, and after storage for 7 days, it was evaluated by a three-step evaluation whether it could be applied. (N = 20)

  As is apparent from the results of Tables 1 to 3, the applicators using the application bodies of Examples 1 to 3 (FIGS. 6 to 8) that fall within the scope of the present invention are comparative examples 1 to 1 that fall outside the scope of the present invention. Compared with the applicator using the applicator 3 (FIGS. 9 to 11), it was found that the applicator can be easily drawn without clogging.

  It can be used suitably for applicators such as liquid eye liners and liquid eye shadows.

DESCRIPTION OF SYMBOLS 10 Liquid press mechanism 12 Shaft main body 13 Feeding member 17 Piston body 18 Seal part 19 Joint member 20 Lead axis 30 Application body 31 Liquid flow path 32 Opening part 34 Application surface

Claims (6)

  An applicator having an application body formed of a thermoplastic rubber or a thermoplastic elastomer provided in front of a coating liquid-containing container for discharging a coating liquid built in front of the liquid pressing mechanism by a liquid pressing mechanism, The application body has a tapered shape, forms a liquid flow passage inside the application body, the application body has one application liquid outflow opening, communicates with the liquid flow passage inside the application body, and The surface of the opening is a substantially flat surface or an inclined surface, and is provided with a coating surface having a further tapered surface portion further ahead of the surface of the opening portion, and a coating surface having a further tapered surface portion further ahead of the opening surface. The applicator characterized in that the portion excluding the surface has a liquid flow passage substantially similar to the outer diameter shape. The distance between the opening A and the bottom of the liquid flow path at the bottom of the opening A when the tip of the coating surface having the substantially flat surface portion I further tapered from the surface of the opening A is bent 2 mm. The applicator according to claim 1, wherein when the distance between the opening A before being bent and the bottom of the liquid flow path below the opening A is b, the following formula (I) is satisfied.
a / b <0.9 (I) When the cross-sectional area of the liquid flow passage inside the coated body is B, the cross-sectional area of the liquid flow passage joined to the opening A is C, and the area of the opening A is S, the following formulas (II) to (IV) The applicator according to claim 1 or 2, wherein all of the above are satisfied.
1.5 mm ² <B <3.0 mm ² ......... (II)
0.5 mm ² <C <B (……) (III)
0.6 mm ² <S <2.0 mm ² ......... (IV) The following formula (V) is satisfied in the ratio when the sum of the cross-sectional area B of the liquid flow passage and the cross-sectional area C of the liquid flow passage is divided by the distance D between the liquid flow passages BC. The applicator according to 1 or 2.
(B + C) / D> 0.5 (V)
The applicator according to claim 3, wherein: The ratio between the outer diameter volume Y and the volume X of the substantially similar liquid flow passage in the portion excluding the coating surface having the substantially flat portion I that is further tapered ahead of the surface of the opening A is represented by the following formula (VI). The applicator according to any one of claims 1 to 4, wherein:
X / Y> 0.4 ......... (VI) The coating liquid is a glycerin derivative 3 to 15 having a pigment, 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 molecular weight 200 to 4300. The viscosity (25 ° C.) at a shear rate of 76.8S ⁻¹ in an EMD type viscometer is in the range of 20 to 250 mPa · s. The applicator according to any one of the above.

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