JP2017000369A - Applicator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an applicator providing comfortable application by sufficiently including a coating liquid in a brush head.SOLUTION: The applicator according to the present invention includes a coating liquid stored in a rear part, and a brush head as an application part, at a front part. A brush head 23 is composed of linear synthetic fibers, the tips of which are tapered, and is a bundle body of brush bristles composed of only fibers with noncircular and modified cross section. The modified cross-section brush bristles are composed of a plurality of types of brush bristles 23a and 23b with different cross sections.SELECTED DRAWING: Figure 3

Description

  The present invention relates to an applicator, and more particularly to an applicator in which a coating liquid such as a cosmetic for an eyeliner is incorporated in a shaft tube.

Conventionally, various applicators have been proposed in order to obtain good applicability.
For example, in Japanese Patent Application Laid-Open No. 2004-228867, the applicant of the present invention is a brush tip made of a bundle of fibers in which one end of a synthetic resin fiber having a predetermined length is bundled and integrated to hold a liquid between the synthetic resin fibers. A brush tip is proposed in which a concave portion or a convex portion or a concave-convex portion forming a void is formed on at least a part of the surface of the synthetic resin fiber.
The brush tip described in Patent Document 1 has a concave portion or a convex portion or a concave / convex portion that forms a gap for holding a liquid between synthetic resin fibers, so that liquid such as ink penetrates into these gaps. More liquid can be held between the brushes (between the synthetic resin fibers), and the liquid retention of the brush can be improved.

Moreover, in patent document 2, it is a brush tip made of synthetic resin brush with a tapered tip, and the brush tip has two types of brushes with a straight cross section and a brush with a different cross section. The diameter of the straight brush fiber was set to 0.10 to 0.20 mm, and the diameter of the brush having an irregular cross section was set to 0.10 to 0.20 mm. A brushstroke is proposed.
The brush head described in this Patent Document 2 has good collection and waist stability at the time of application, and it has good liquid content, and when drawing a curve by pressing the brush head, a fine line is stably drawn. Can do.

Furthermore, in Patent Document 3, the brush tip is made of a synthetic resin brush having a tapered tip, and the brush tip has a circular brush with a straight cross section and a brush with a circular cross section having a crimp. In addition, a brush tip is proposed in which the cross-sectional shape of the brush tip is an ellipse or a rectangle in a brush tip formed by blending at least hairs having an irregular shape with a straight cross section.
In the brush ear described in this Patent Document 3, the stability and stability of the tip of the tip and the waist are good at the time of application, and the liquid is contained well. When the tip is pressed and curved, the thick and thin lines are stable. Can be drawn.

Moreover, in patent document 4, it is a brush head made of a synthetic resin brush having a tapered tip, and the brush head includes two types of straight brush brushes having different diameters, and a brush brush having a crimp. There has been proposed a brush head formed by blending at least a brush having an irregular cross section.
In the brush ear described in Patent Document 4, the tip of the brush is well-organized, the liquid such as ink is well retained, a smooth touch is obtained, and the writing performance is excellent.

JP 2001-260585 A JP 2008-55742 A JP 2008-30335 A Japanese Utility Model Publication No. 6-24976

  By the way, in the brush tip described in Patent Document 1, a concave portion or a convex portion or a concave and convex portion for forming a gap for holding a liquid between synthetic resin fibers is formed, and a coating liquid is formed in these gaps. However, the coating solution to be held is insufficient, and there is a possibility that the coating solution may run out or become dull at the time of coating.

Further, the brush heads described in Patent Documents 2 to 4 are a mixture of a brush having a straight cross section and a brush having a straight cross section, or a brush having a straight cross section and a crimp. A brush with a circular cross section and a brush with a different straight cross section, two straight brushes with different diameters, a brush with a crimp, and a brush with a cross section And is a mixture of hair. That is, the brush ears described in Patent Documents 2 to 4 include one type of straight brush with an irregular cross section.
Even in the brush heads described in these Patent Documents 2 to 4, the coating solution is retained between the brushes, but the retained coating solution is insufficient, and there is a risk of causing the coating solution to run out or scum at the time of coating. was there.

  The present invention has been made to solve the above technical problem, and an object of the present invention is to provide an applicator that can sufficiently contain a coating solution in a brush tip and that can provide a comfortable application.

  The applicator according to the present invention, which has been made to achieve the above object, contains an application liquid in the rear part, and in the applicator provided with a brush ear that is the application part in the front part, the brush ear is a linear synthetic An assembly of brushes made of only fibers having a non-circular cross section having a non-circular cross section, wherein the brush having the cross section has a plurality of types of brushes having different cross sectional shapes. It is said.

In this way, the brush ear is a collection of brushes made of only a synthetic fiber having a linear shape and a non-circular cross-section of a non-circular cross-section, and the brush of the cross-section has a cross-sectional shape. Therefore, a space (gap) extending in the axial direction of the brush, which holds the coating liquid between the brushes, is formed.
In addition, a sufficient coating solution is held in the space (gap), and it is possible to suppress the coating solution from being cut off or to be damaged at the time of coating, so that the coating can be performed comfortably.

  Here, it is desirable that the brush with the irregular cross-section has a tapered tip. By adopting the tip taper processing, the tip of the entire application portion becomes tapered, and application of details becomes easy.

Further, it is preferable that the odd-shaped cross-section brush includes at least a star-shaped brush having a cross-sectional shape and an eyebrows-shaped brush having a cross-sectional shape and a recessed central portion.
As described above, the star shape has many indented portions and it is easy to collect liquid on the fiber surface. However, when a brush is formed with only the star shape, the indentations partially overlap and the voids are reduced. On the other hand, the eyebrows type has few depressions, but it is easy to form voids between fibers with a long width and a short width. Therefore, by mixing the above two types, many voids are formed between the fiber surface and the fiber, and the liquid containment property is improved. The liquid content is desirably 30 mg or more.

The mixing ratio of the brush having the star shape and the eyebrow having the cross-sectional shape is 1:99 to 99: 1, more preferably 20:80 to 80:20.
In this way, increasing the star shape increases the dents on the fiber surface and increases the voids on the fiber surface, but the surface dents between the fibers are easily caught, making it difficult to mix the fibers, and homogenizing the fibers in the brush. This makes it difficult to mass-produce stable quality brushes. In addition, by increasing the number of eyebrows, it becomes easy to mix the fibers, but the porosity of the fiber surface is reduced, and the liquid content is lowered as a whole.

Here, it is desirable that the irregularly shaped brush has a dent on the outer surface of the fiber and a minimum equivalent diameter of a cross section perpendicular to the axis of the fiber is at least 0.05 mm.
Since the fiber outer surface of the brush having the irregular cross section has a dent, the coating liquid can be stored in the dent. As a result, coupled with the space extending in the axial direction of the brush, a sufficient coating solution is retained, and the coating solution can be applied comfortably by preventing problems such as running out of coating solution and scumming during coating.
Further, since the minimum equivalent diameter of the cross section perpendicular to the fiber axis is at least 0.05 mm, so-called waist weakness can be suppressed and comfortable writing performance can be obtained.

  ADVANTAGE OF THE INVENTION According to this invention, the coating liquid which can fully include a coating liquid in a brush ear and can apply | coat comfortably can be obtained.

Drawing 1 is a figure showing one embodiment of the applicator concerning the present invention, and is a side view showing the state before use. Drawing 2 is a figure showing one embodiment of the applicator concerning the present invention, and is a side view showing a use start state. FIG. 3 is a side view of the brush head used in FIG. FIG. 4 is a side view of one of the brushes used in FIG. FIG. 5 is a side view of another brush used in FIG. FIG. 6 is a side view of another variation of the brush shown in FIG. FIG. 7 is a perspective view showing a modified example in which a concave portion is formed in one of the brushes shown in FIG. FIG. 8 is a perspective view showing a modification in which a concave portion is formed in the other brush shown in FIG. FIG. 9 is a schematic view of a manufacturing apparatus for manufacturing the brush head shown in FIG. 10 is an enlarged view of a main part of the brush ear manufacturing apparatus shown in FIG. FIG. 11 is a schematic view for explaining the state of rubbing between the rotating abrasive rubbing blade and the fiber bundle.

Hereinafter, an embodiment of an applicator according to the present invention will be described with reference to FIGS. 1 to 4.
As shown in FIG. 1, the applicator 1 according to this embodiment is attached to a coating liquid storage portion (accommodating portion) 11 provided in the front inside of the shaft body 10 and a front end portion of the shaft body 10. Before use, the stopper 12 that seals the reservoir (accommodating portion) 11 and the stopper 12 are attached to the stopper 12 to maintain the sealed state of the reservoir (accommodating portion) 11 and are removed from the stopper 12. Thus, a sealing ball 13 that opens the sealed state of the storage part (accommodating part) 11 and discharges the coating liquid from the storage part (accommodating part) 11 is provided.

Further, the applicator 1 includes a stopper 14 that is detachably mounted on the outer peripheral surface of the front end portion of the shaft main body 10, and the stopper 14 is removed at the start of use. And a tip shaft 20 that moves in the direction and is directly joined to the shaft body 10.
The front shaft 20 includes a front shaft main body 21, a pipe joint 22 attached to the front shaft main body 21 and capable of supplying a coating liquid from the storage unit 11 to the brush head (application unit) 23, and the pipe An application liquid conducting tube 24 that connects the joint 22 and the brush head (application unit) 23 is provided.

Since it is configured in this way, in the state shown in FIG. 1 (the state before the start of use), since the stopper 14 is mounted on the shaft body 10, the front shaft 20 does not move, and the storage portion The sealed state of the storage part (accommodating part) 11 is maintained by the plug 12 (sealing ball 13) that seals the (accommodating part) 11.
As shown in FIG. 2, when the stopper 14 is removed at the start of use, the tip shaft 20 moves in the axial direction by the length of the stopper 14 and comes into contact with the shaft main body 10. That is, the pipe joint 22 of the front shaft 20 and the plug body 12 are joined, and the seal ball 13 attached to the plug body 12 is removed by the tip of the pipe joint 22.
As a result, the sealed state of the storage unit (accommodating unit) 11 is released, and the application liquid can be supplied from the storage unit 11 to the brush head (application unit) 23.

A coating liquid discharge mechanism 30 is provided at the rear end portion of the shaft tube main body 10. The coating liquid discharge mechanism 30 is configured to advance the piston 32 by a predetermined distance by rotating the canopy 31 and derive a predetermined amount of coating liquid. The brush head 23 is covered with a cap 40.
In FIGS. 1 and 2, reference numeral 15 denotes a stirring ball for stirring the coating solution. The coating liquid discharge mechanism 30 is disclosed in Japanese Patent Laid-Open No. 2012-157611 previously proposed by the present applicant. The coating liquid discharge mechanism 30 may be not only a rotary type that leads out the coating liquid by rotating the canopy 31 but also a knock type that leads out the coating liquid by pressing the canopy 31.

In the applicator configured in this way, first, the stopper 14 is removed, and the cap 40 (front shaft main body 21) is pushed (moved) to the rear side of the shaft tube main body 10. As a result, the end of the pipe joint 22 comes into contact with the seal ball 13, and the seal ball 13 is detached from the seal receiver 12 so that the coating liquid can be supplied.
Thereafter, the cap 40 is removed, the canopy 31 is rotated, and the piston 31 is moved forward by a predetermined distance, whereby a predetermined amount of coating liquid is derived from the brush head 23, and the coating liquid is applied to the application site of the user. To do.

Next, the brush ear will be specifically described with reference to FIGS.
The brush head 23 is an assembly of brushes 23a and 23b made of a straight synthetic fiber having a tapered tip and a non-circular cross-section of a non-circular cross-section. The bristles 23a and 23b are composed of a plurality of types of brush having different cross-sectional shapes.
These brushes 23a and 23b are welded to each other so as to form one ring-shaped hook-like welded end 23A at one end thereof.
In addition, a hole 23B is provided in the central portion of the bowl-shaped welding end portion 23A to improve the flowability and replenishability of the coating liquid. Note that the holes 23B are not necessarily formed when it is not necessary to circulate and replenish liquids such as coating liquids as frequently.

  In addition, the irregular cross-section brush means that the shape of the surface perpendicular to the axial direction of the brush is other than circular, for example, the cross-sectional shape is a substantially star shape, a substantially eyebrow shape, a substantially cross shape, a substantially triangular shape, Examples include a substantially Y shape, a substantially semicircular shape, and a substantially rectangular shape.

Here, the brush having an irregular cross-section will be described with reference to FIGS. 4 and 5 by taking, as an example, a brush having a cross-sectional shape of a substantially star shape and a substantially eyebrow shape. In addition, although the cross-sectional shape will be described taking a brush with a substantially star shape and a substantially eyebrows as an example, the present invention is not limited to a substantially star shape and a substantially eyebrows shape, and the brush has two types of irregular cross sections. It is not limited, and the brush may have two or more types of irregular cross sections.
Examples of synthetic resin fibers used as a brush material include, for example, polyesters such as polyethylene terephthalate, polybutylene terephthalate, polyethylene terephthalate / isophthalate copolymer, polyolefins such as polyethylene and polypropylene, nylon 6, nylon 610, Examples thereof include synthetic resin fibers obtained by melt spinning a thermoplastic polymer such as polyamide such as nylon 612.

As shown in FIG. 4, in the brush 23a having a substantially star shape in cross section, the dimension La1 between the concave portions facing the convex portion tip is 120 μm to 200 μm, and the convex portion facing the convex portion tip is provided. The dimension La2 between the portions is preferably in the range of 140 μm to 250 μm.
It is preferable to reduce the dimension La1 and increase the dimension La2, since the unevenness formed on the outer peripheral surface of the brush can be deepened (enlarged) and a large amount of coating liquid can be retained. On the other hand, if the dimension La1 is small and the dimension La2 is large, the waist of the brush becomes weak and cannot be applied comfortably. Therefore, it is preferably formed within the above range.

Further, as shown in FIGS. 5 and 6, when the cross-sectional shape of the brush 23 b has a substantially eyebrows shape, the cross-sectional shape is a shape in which two circles having substantially the same shape are connected in FIG. 5. FIG. 6 shows a shape in which two substantially identical circles are connected by a rectangle.
In addition, it is preferable to increase the recess depth dimension (difference between Lb1 and Lb2) formed on the outer peripheral surface of the substantially eyebrows type brush 23b because the amount of the coating liquid can be increased.
However, if the connecting portion length dimension Lb2 is too small, there is a risk that the connected state of the two circles may be damaged, and if it is damaged, it becomes a brush with a normal circular cross section, and the amount of the coating liquid cannot be increased. It is not preferable.
Therefore, Lb1 and Lb3 (dimensions to the line symmetry axis) are 70 μm to 200 μm, Lb2 is 20 μm to 190 μm, Lb4 is in the range of 80 μm to 390 μm, and more preferably Lb1 and Lb3 are from 100 μm to When Lb4 is in the range of 150 μm to 300 μm, the fiber is unlikely to be bifurcated when the tip of the brush is tapered, and the dent tends to remain in the tapered region. Preferably it is.

The brush head 23 is composed of a plurality of types of brushes having different cross-sectional shapes, for example, a brush having a substantially star shape in cross-sectional shape and a brush having a substantially eyebrows cross-sectional shape.
The reason why a plurality of types of brushes having different cross-sectional shapes is used is as follows.
(1) When brushes having the same cross-sectional shape are used, the concavo-convex portions formed on the outer peripheral surface are fitted to each other, and part or all of the concave portions formed on the outer peripheral surface of the brush are filled with the brush. The gap (gap) is reduced, and the coating liquid contained in the brush head is reduced. On the other hand, when a plurality of types of brushes having different cross-sectional shapes are used, the uneven portions formed on the outer peripheral surface are difficult to fit, and the reduction in the gaps (gap) between the brushes is suppressed.
(2) In addition, when brushes having the same cross-sectional shape are used and the uneven portion formed on the outer peripheral surface of the brush is enlarged, the waist of the brush tends to be weakened. On the other hand, by using multiple types of brushes with different cross-sectional shapes, even if the unevenness on the outer peripheral surface of one brush is enlarged, the strength of the brush can be given by the other brush. , Suitable coating properties can be obtained.

  Further, the thickness of the fiber used for the brush is not necessarily limited to this, but the minimum diameter (diameter) of the equivalent diameter of the cross section perpendicular to the axis of the fiber is 0.05. Short fibers having a length of about 0.3 mm and a length of about 5 to 100 mm are used.

Moreover, as shown in FIG. 7, FIG. 8, you may form recessed part 23a1, 23b1 in the surface part of the brush (synthetic resin fiber) 23a, 23b. Thus, since the recessed part 23a1, 23b1 is formed in the fiber surface in a longitudinal direction (axial direction) from the front-end | tip part of the brush 23a, 23b which consists of synthetic resin fibers, the brush (synthetic resin fiber) 23a is formed. , 23b, many minute voids are generated.
As a result, the coating liquid penetrates into these gaps, and a lot of liquid is held between the brushes (synthetic resin fibers).

In addition, the size of the recess formed on the surface of such a fiber is not particularly limited, but in general, the depth of the recess is 20 μm or less, particularly 5 to 10 μm, from the viewpoint of the liquid holding power. Preferably, the average pitch of the irregularities is in the range of 0.1 to 0.5 mm.
Further, even when a concave portion is formed on the surface portion of the brush (synthetic resin fibers) 23a, 23b, the equivalent diameter of the cross section perpendicular to the axis of the concave portion is 0.05 mm or more.

The recesses 23a1 and 23b1 may be formed in a spiral shape continuously from one end side to the other end side of the brushes (synthetic resin fibers) 23a and 23b.
Moreover, you may form a convex part in the surface part of the brush | brush (synthetic resin fiber) 23a, 23b, and this convex part is a spiral shape from one end part side to the other end part side like the said recessed part. It may be formed continuously. In general, it is preferable that the height of the convex portion is 20 μm or less, particularly 5 to 10 μm, and the average pitch of the convex portion is in the range of 0.1 to 0.5 mm.

  The brush (synthetic resin fiber) contains titanium oxide and the like, forming convex portions on the surface portions of 23a and 23b, providing a gap between the fibers, and suppressing the adhesion between the fibers. Also good.

The brush head 23 only needs to be composed of a plurality of types of brushes having different cross-sectional shapes, and the cross-sectional shape is limited to a substantially star-shaped brush and a cross-shaped brush having a substantially eyebrows shape. Is not to be done. For example, it may be a substantially cross shape, a substantially triangular shape, a substantially Y shape, a substantially semicircular shape, a substantially rectangular shape, or the like, and is not limited to two types, but has two or more types of irregular cross sections. Brush hair may be mixed.
This mixing ratio is appropriately set according to the use of the brush ear, particularly the required degree of retention, for example, when the cross-sectional shape of the brush and the cross-sectional shape of the eyebrow are mixed The mixing ratio is preferably 80:20 to 20:80 from the viewpoint of a substantial improvement effect of the holding power.

  Next, a method for producing the brush ear according to the present invention will be described with reference to FIGS. In addition, in order to manufacture the brush ear of this invention, it is not necessarily limited to this method and order.

First, a synthetic resin fiber (brush) having an irregular cross-sectional shape is prepared.
Although this brush may be manufactured by itself, for example, a commercially available synthetic resin fiber (brush) having a star shape or eyebrow cross-sectional shape may be used as the brush.

First, a fiber bundle is produced by binding and integrating the synthetic resin fibers (brushes).
Next, in order to attach the fiber bundle manufactured in this way to the handle, to taper the synthetic resin fiber (brush) of the fiber bundle and to form a concave portion, a convex portion, or a concave-convex portion on the surface Surface treatment is performed.
The taper treatment and the surface treatment are simultaneously performed while polishing and rubbing while swelling the synthetic resin fiber using a treatment liquid that is soluble or swellable with respect to the synthetic resin fiber. The treatment liquid used differs depending on the type of synthetic resin fiber. For example, in the case of polyester resin fibers, a sodium hydroxide aqueous solution is generally used. In the case of polyamide fibers, metacresol and calcium chloride / methanol solution are mixed. Admixtures are used respectively.

The taper treatment and surface treatment of synthetic resin fibers using such a treatment liquid will be described with reference to FIGS. 9 to 11 in the case of a nylon fiber bundle.
In this processing method, as shown by reference numerals 50A, 50B, and 50C, a processing apparatus in which a plurality of solution tanks are arranged in series is used. In the case of this processing method, saturated calcium chloride / methanol solution is used for the solution of the first solution tank 50A and the solution of the second solution tank 50B is used as the processing solution used for polishing rubbing / washing of the nylon fibers. Uses a mixture of calcium chloride 15% (by weight) and methanol 85% (by weight), and methanol (100%) as the cleaning liquid in the cleaning liquid tank 50C.

Further, in the first solution tank 50A and the second solution tank 50B, the nylon fibers of the nylon fiber bundle 51 are polished and rubbed to be processed into a taper shape, and a concave or convex portion or a concave and convex portion is formed on the surface. A rotary polishing rubbing body 52 for forming (surface treatment) is provided.
The rotary abrasive rubbing body 52 includes a thin disc-shaped abrasive rubbing blade 53, a rotating shaft 54 in which a large number of the abrasive rubbing blades 53 are arranged in parallel at a predetermined interval, and the polishing The spacer 55 is arranged between the rubbing blades 53.
Further, at least a part of the rotary abrasive rubbing body 52 (the abrasive rubbing blade 53) is disposed so as to be immersed in the solution tank. Although the rotary polishing rubbing body 52 is also disposed in the cleaning tank 50C, the cleaning liquid is non-swelling with respect to the nylon fiber, and therefore no polishing rubbing is performed in this portion.

When processing the raw applicator with the nylon fiber bundle 51 attached to the tip of the handle 50 using the above apparatus, first, the fiber bundle 51 is directed downward with respect to the rotary head 56. The end of the handle 50 is clamped and moved toward the first solution tank 50A.
Then, the nylon fiber bundle 51 is moved up and down from above the rotating abrasive rubbing body 52 while rotating at a predetermined rotation speed, and the nylon fiber bundle 51 is brought into contact with the abrasive rubbing blade 53 for a predetermined time.

At this time, the solution in the first solution tank 50 </ b> A adheres to the nylon fiber bundle 51, so that the surface of the nylon fiber is dissolved and swelled and peeled off by the abrasive rubbing blade 53.
That is, as shown in FIG. 11, since the rotary abrasive rubbing blade 53 is formed with a serrated blade 53a, the rotary abrasive rubbing blade 53 rotates with the comb on the fibers of the nylon fiber bundle 51. Repeat the process of melting and rubbing. At this time, by controlling the rotational speed and the vertical movement speed of the nylon fiber bundle 51, the nylon fibers constituting the fiber bundle are processed into a taper shape, and as shown in FIGS. Concave portions 23a and 23b that are continuous on the surface are formed in a spiral shape. Further, the overall shape of the nylon fiber bundle 51 is tapered so as to become narrower as it goes to the tip.

Next, the rotary head 11 is raised, the applicator is moved to the second solution tank 50B, and the nylon fiber bundle 51 is again brought into contact with the rotary abrasive rubbing body 52 for a predetermined time while being rotated again. The abrasive rubbing in the second solution tank 50B increases the amount of abrasive rubbing in the first solution tank 50A, and the basic action is the same as that of the first solution tank 50A.
That is, by controlling the rotational speed and the vertical movement speed of the nylon fiber bundle 51, the nylon fibers constituting the fiber bundle are formed into a tapered shape which is the final shape, and the surface thereof is shown in FIGS. The recesses 23a and 23b having a final shape as shown can be formed in a spiral shape. The overall shape of the fiber bundle is also a final tapered shape.

  Finally, the rotary head 56 is raised and slid to move to the cleaning tank 50C, and the nylon fiber is brought into contact with the rotary abrasive rubbing body 52 for a predetermined time to clean the fiber and finish the processing.

  Then, a plurality of types of synthetic resin fibers (brushes) having irregular cross-sectional shapes with concave portions formed on the surface thus manufactured are prepared, mixed at a desired ratio, and a disc-shaped brim is formed at one end. Thus, the brush head 23 as shown in FIG. 3 is formed.

In order to manufacture a synthetic resin fiber brush that does not form a recess, in the above-described method, the rotating abrasive rubbing blade 53 is rotated, the synthetic resin fiber bundle 51 is rotated, and the synthetic resin fiber bundle is vertically moved. This is achieved by controlling the movement of the direction.
Moreover, in the said embodiment, although the taper process and surface treatment were performed using the 1st, 2nd solution tank, it is not limited to this in particular, You may carry out using one solution tank. In addition, the taper process and the surface treatment are simultaneously performed in one process, but the present invention is not particularly limited thereto, and the taper process and the surface process may be performed in separate processes.

The cosmetic material stored in the storage unit (storage unit) 11 is a liquid cosmetic material including at least an inorganic pigment, a dispersant, a neutralizing agent, a film forming agent, and water, and the dispersant is tert- A copolymer of a mixture of butyl acrylate, ethyl acrylate and methacrylic acid is dissolved in water by the neutralizing agent, and the film forming agent is acrylic acid, methacrylic acid or their (C _{1 to} C ₄ and C ₈ ) A homopolymer or copolymer emulsion using one or more compounds selected from alkyl esters or styrene as a raw material monomer, without further adding a surfactant, or A liquid cosmetic comprising 0.5% by mass or less is suitable.

In detail, dispersant, acrylic acid, homopolymers of methacrylic acid or one or more compounds selected from among those (C ₁ -C ₄ and C ₈₎ alkyl ester as a raw material monomer Or it is a copolymer. Desirably, the homopolymer or copolymer has an acidic residue as a side chain in the repeating structure, and is preferably an acrylic resin that can be dissolved in water by neutralization. As a particularly desirable acrylic resin, a copolymer of a mixture comprising tert-butyl acrylate, ethyl acrylate and methacrylic acid is exemplified.

Upon dissolution in water by neutralization, 2-amino-2-methyl-1-propanol, 2-amino-2-methyl, which can form a salt paired with an organic acid residue having a free bulky organic group Organic basic compounds such as -1,3-propanediol and L-arginine, and inorganic basic compounds such as aqueous ammonia and sodium hydroxide can be preferably used. Of these, a particularly preferred basic compound is 2-amino-2-methyl-1-propanol.
In this liquid cosmetic, these basic compounds are allowed to act on the homopolymer or copolymer to form a salt-structure polymer structure, and then the minimum amount of purified water necessary for dissolution is added. An aqueous solution is used as the dispersant.
The acrylic resin-based polymer used as a dispersant in the liquid cosmetic is a betaine-type acrylic acid-based amphoteric resin used as a pigment dispersant in a liquid cosmetic described in JP-A-2003-73220. Are polymers with different structures.

  In the liquid cosmetic, the blending amount of the dispersant is preferably 0.5 to 5% by mass, and more preferably 2 to 4% by mass with respect to the entire liquid cosmetic. If the amount is less than 0.5% by mass, the dispersion stability of the pigment becomes insufficient. On the other hand, if the amount exceeds 5% by mass, the viscosity becomes too high to improve the dispersion stability, which is not economical.

The film-forming agent is a homopolymer using a compound selected from acrylic acid, methacrylic acid or their (C ₁ -C ₄ and C ₈ ) alkyl ester and one or more of styrene as a raw material monomer (however, (Excluding homopolymers consisting only of polystyrene) or emulsions of copolymers (whether homopolymers or copolymers), obtained by emulsion polymerization of monomers in water as a polymerization solvent Meaning an aqueous suspension).
The emulsion as the coating film forming agent, acrylic acid, methacrylic acid or their (C ₁ -C ₄ and C ₈₎ consists of one or more monomers selected from among alkyl ester homopolymer or A copolymer emulsion can be preferably used. Specifically, for example, Yodosol GH800 manufactured by NSC Japan, COVACRYL MS11 manufactured by Daito Kasei Kogyo Co., Ltd., or the like can be used. The blending amount of the emulsion is preferably 2 to 15% by mass of the whole liquid cosmetic in terms of solid content. If it is less than 2% by mass, the water resistance is poor, and if it exceeds 15% by mass, the application part of the applicator may dry and become unapplicable.
In addition, about the emulsion of a film formation agent, surfactant may be used in order to stabilize these emulsion itself. Since the surfactant here has little influence on water resistance and skin adhesion, which are performances of liquid cosmetics, the addition amount is not particularly limited.

  Inorganic pigments include oxides such as titanium oxide, zinc oxide, bengara, chromium oxide, black iron oxide, yellow iron oxide, and sintered pigments such as titanium black, lithium cobalt titanate, titanium / titanium oxide sintered products, Pigments such as bitumen, ultramarine, and carbon black can be suitably used. The primary particle diameter is, for example, about 0.2 μm to 1 μm for black iron oxide and about 0.02 to 0.7 μm for Bengala. The specific gravity of liquid cosmetics containing these pigments is large and depends on the amount of the pigments contained, but when prepared as a cosmetic liquid for eyeliner, the specific gravity is in the range of about 1 to 1.4. In the liquid cosmetic, the blending amount of the inorganic pigment is preferably in the range of 1 to 30% by mass, more preferably in the range of 5 to 25% by mass with respect to the entire liquid cosmetic. If it is less than 1% by mass, the color development is thin and is insufficient as a cosmetic, and even if it is added in excess of 30% by mass, the color development is not so much improved, and the production cost increases, resulting in lack of economic efficiency.

As the surfactant, any of nonionic, cationic and anionic surfactants 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 (phosphate ester), polyethylene glycol fatty acid Examples thereof include esters and alkyl sulfates (sulfonate esters), polyoxyethylene alkyl ether sulfates, and the like.
The amount of the surfactant is preferably 0.5% by mass or less based on the total amount of the liquid cosmetic, and if it exceeds 0.5% by mass, the water resistance is inferior and sufficient fixing strength cannot be obtained.

Moreover, the viscosity value (25 degreeC) of liquid cosmetics exists in the range of 3-200 mPa * s, More preferably, it exists in the range of 5-150 mPa * s. In addition, the viscosity value here is a value measured by Toki Sangyo's EMD viscometer standard cone rotor 20 rpm (shear speed 76.8 s-1). If the viscosity value of the liquid cosmetic is less than 3 mPa · s, it will cause the solid components to settle over time, and the liquid cosmetic filled in the applicator will not be able to be applied uniformly, or a lump will form in the applicator. Is not preferable because it may even be impossible. On the other hand, when the viscosity value of the liquid cosmetic exceeds 200 mPa · s, the followability associated with the application of the liquid cosmetic filled in the applicator is lacking due to the high viscosity, which may make it difficult to apply smoothly. Absent.
Further, the surface tension at a temperature of 25 ° C. by the Wilhelmy method (plate method) is in the range of 30 to 60 mN / m, more preferably in the range of 35 to 55 mN / m. If it is less than 30 mN / m, bleeding and unevenness occur in the coated drawn line, and smooth coating becomes difficult. On the other hand, if it is larger than 60 mN / m, the followability of the coating solution is deteriorated and smooth coating becomes difficult.

The following samples were made.
Star-shaped cross-section fibers (see FIG. 4): La1 130 mm, La2 150 mm
Fibers with eyebrows cross section (see Fig. 5): Lb1 95mm, Lb2 75mm, Lb3 90mm, Lb4 185mm
As a comparative example, a fiber having a circular cross section: outer diameter φ0.15 mm
The coating portion 23 had a total length of 17 mm, an outer diameter φ3 mm of the flange-shaped welding end portion 23A, and the tip was processed into a tapered shape.
The following compounding was used for the coating liquid (liquid cosmetics) used in the Examples and Comparative Examples. In the following description, “part” means “part by mass”.
[Combination]
Black iron oxide 10.0 parts Alkyl acrylate copolymer 0.6 parts Alkyl acrylate copolymer emulsion 20.0 parts (resin content in the above emulsion) 9.0 parts Disodium edetate 0.3 part 1, 3-butylene glycol 8.0 parts xanthan gum 0.3 part methylparaben 0.4 part sodium dehydroacetate 0.1 part purified water remainder (51.3 parts)
Total 100.0 parts The above components were mixed and stirred at room temperature for 3 hours to obtain a black liquid cosmetic with a viscosity of 84 mPa · s. The viscosity was measured at a measurement temperature of 25 ° C. with an EMD viscometer standard cone rotor 20 rpm (shear speed 76.8 s −1) manufactured by Tokimec.
As for the evaluation method, the content of the liquid (hereinafter referred to as “result”) is obtained by transferring the coating liquid (liquid cosmetic) to a deep dish container and immersing 1.5 mm from the tip of the coating part in the coating liquid. The amount of the liquid contained in the coating part was measured in a state where the coating liquid was immersed in the entire coating part. The evaluation criteria were as follows.
A: 30 mg or more O: 25 mg to 30 mg
(Triangle | delta): Less than 25 mg The evaluation result was as follows. The notation is shape 1: shape 2 = fiber blending ratio.
〔Example〕
・ Star: Eyebrows = 75:25 Result ◎
・ Star: Eyebrows = 50:50 Result ◎
・ Star: Mayu = 25: 75 Result ◎
・ Star: Mayu = 1: 99 Result ○
[Comparative Example]
-Eyebrows: Yen = 75:25 Result △
・ Star: Circle = 50: 50 Result △
・ Star: eyebrows: yen = 25:60:15 result △

DESCRIPTION OF SYMBOLS 1 Applicator 10 Shaft body 11 Storage part (accommodating part)
12 Plug body 13 Seal ball 14 Stopper 20 Front shaft 21 Front shaft main body 23 Brush head (application part)
23a Modified cross-section fiber (star)
23a1 Concave part 23b Deformed cross-section fiber (eyebrows type)
23b1 concave portion 23A bowl-shaped welding end 23B hole

Claims (5)

  In the applicator that contains the coating liquid in the rear part and the brush head that is the coating part in the front part, the brush head is made of only a synthetic fiber having a linear shape and a non-circular shaped cross-section fiber. An applicator comprising a plurality of types of brushes having different cross-sectional shapes.   The applicator according to claim 1, wherein the brush tip is tapered.   The applicator according to claim 1 or 2, wherein the odd-shaped cross-section brush includes at least a star-shaped brush and a cross-shaped eyebrow brush.   The mixing ratio of the brush having a cross-sectional shape of a star and the brush having a cross-sectional shape of an eyebrows is 99: 1 to 1:99. The applicator according to 1. The irregular cross-section brush is
While having a dent on the fiber outer surface,
The applicator according to claim 4, wherein a minimum diameter of an equivalent diameter of a cross section perpendicular to the axis of the fiber is at least 0.05 mm.

Images