JP2018020105A - Brush for cosmetic implements and manufacturing method of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a brush for cosmetic implements in which brush bristles having tapered ends are provided around a support member in the radial direction, and a manufacturing method thereof.SOLUTION: A brush for cosmetic implements according to the present invention includes a brush part attached to a support member. The brush part 3 includes: a plurality of synthetic resin fibers 3b whose tip ends have conically tapered surfaces; and a plurality of fiber bundles 3A composed of a plurality of synthetic resin fibers 3b, formed at least three locations in a radial circumferential surface of a support body 2, and further formed in an axial direction thereof.SELECTED DRAWING: Figure 4

Description

  TECHNICAL FIELD The present invention relates to a cosmetic brush and a method for producing the cosmetic brush, for example, a cosmetic tool having brush hairs extending in the radial direction of the support (in the direction perpendicular to the axis of the support), such as a mascara brush. The present invention relates to a brush and a method for manufacturing the cosmetic brush.

As a brush for a cosmetic tool having brush hairs extending in the radial direction of the brush support (in the direction perpendicular to the axis of the support), for example, a mascara brush used when applying mascara to the eyelashes is known.
The mascara brush has, for example, a large number of brush hairs (fibers) extending from the wire wire (axis) to the radial direction (perpendicular to the axis) between two twisted wire wires. Brush hair (fiber) is fixed.
In addition, some brush hairs (fibers) are formed such that the free ends of the brush hairs (fibers) are tapered so that they can easily enter between the eyelashes when applying mascara.

Various proposals have been made on the tapered bristle (fiber).
For example, Patent Document 1 proposes a bristle in which a cross section of a free end of the bristle is formed in a wedge shape. Patent Document 2 proposes a brush bristle in which the tip of the bristle is melted and extended by thermal processing to form a right-angled triangular taper as seen from the side. Further, Patent Document 3 proposes a brush hair in which a tip portion of the brush bristle is formed by a grinding process of a grindstone or a file to form a tapered portion of a right triangle as viewed from the side.

  However, since the free ends (tip portions) of the bristle shown in Patent Documents 1 to 3 are formed in a wedge shape and a right triangle shape as described above, the cross section is a wedge shape as shown in FIG. If the right-triangle-shaped brush bristles 50 are arranged so as to face the same direction, the repulsive force against the force from the A direction along the axis of the support is different from the repulsive force against the force from the B direction opposite to the A direction. There was a problem. That is, there is a problem that the flexibility of the brush varies depending on the direction of use and the feeling of use is different.

As a method for solving this problem, Patent Document 4 proposes a brush for cosmetics in which the tip of brush hair (fiber) is formed in a conical shape.
The brush for cosmetics shown in this patent document 4 has brush hairs made of synthetic resin, whose hair tips are tapered (conical shape), erected in one row along the longitudinal direction, and adjacent brush hairs are It is comprised by the support part fixed by inserting the brush part formed apart and the brush part.
According to the brush for cosmetics, since the tip of the brush hair (fiber) is formed in a conical shape, the repulsive force against the force from the A direction along the axis of the support and the B direction opposite to the A direction. The repulsive force with respect to the force from the can be made substantially the same, and the feeling of use is improved.

JP 2004-49906 A JP 2008-307304 A JP 2009-60998 A Japanese Patent No. 4846323

  However, as described above, the brush for a cosmetic tool disclosed in Patent Document 4 includes a brush portion in which synthetic resin brush hairs are erected in one row along the longitudinal direction. A plurality of rows of brush hairs are not provided around the periphery (the peripheral surface in the cross section of the support). For this reason, there is a technical problem that, when used, mascara must be applied to the eyebrows while taking care of the position of the brush portion.

In order to solve this problem, it is conceivable to insert and fix a plurality of brush portions around the entire circumference of the support, but a new problem arises that the diameter of the support becomes large.
It is also conceivable to plant the brushed hairs by welding or bonding at a plurality of positions around the radial direction of the support, but the lengths (tips) of the planted brush hairs are uneven. A new problem arises.
Furthermore, after providing the bristle at a plurality of positions around the radial direction of the support, it is conceivable to taper the tip of the bristle, but in the case of grinding with a grindstone or a file, As described above, it is difficult to form the tip of the brush bristles (fibers) in a conical shape, and in the case of thermal processing, the bristles may be welded to each other.

In developing a brush for a cosmetic tool in which brush portions are formed at a plurality of positions around the support in the radial direction, the present inventors formed brush hair around the support, We have conducted intensive research on the assumption that the tip will be tapered.
As a result, according to a specific manufacturing method, it has been found that brush hairs having tapered tips can be formed at a plurality of positions around the radial direction of the support, and the present invention has been completed.

  The present invention has been made in order to solve the above technical problem, and a brush for a cosmetic tool having brush hairs with tapered tips at a plurality of positions around the radial direction of a support, and a method for manufacturing the same. The purpose is to provide.

  A brush for cosmetics according to the present invention made to achieve the above object is a brush for cosmetics having a brush part attached to a support, and the brush part has a conical tapered surface at a tip part. Provided on the peripheral surface of the support so that a fiber bundle comprising a plurality of synthetic resin fibers formed of and formed of a plurality of synthetic resin fibers extends in at least three directions of the support radial direction. Further, the fiber bundle is provided on a peripheral surface in the axial direction of the support.

Thus, since it is provided on the peripheral surface of the support so as to extend in at least three directions of the support radial direction, and further, the fiber bundle is provided on the peripheral surface in the axial direction of the support. When used, mascara can be applied to the eyebrows without worrying about the position of the brush portion, and the usability can be improved.
The radial peripheral surface of the support is not only the peripheral surface of one cross section of the support, but also the cross section during one rotation of the metal wire (support) like a twisting brush described later. It is included in one cross section, and the peripheral surface of this cross section is included in the peripheral surface in the radial direction.

Here, the support is composed of two or more twisted metal wires, and the synthetic fiber bundle is sandwiched between the metal wires, and the metal wire is twisted to thereby support the support. It is desirable to be provided on the body. In particular, by setting the number of metal wires to three or more, the number of combinations of fibers increases, and brushes with various fiber arrangements can be manufactured.
Moreover, it is desirable that the fiber bundle includes a mixture of straight fibers and non-straight fibers. The straight fiber refers to a fiber having a straight fiber axis, and the non-straight fiber refers to a fiber having a curved fiber axis, for example, a crimped fiber.
Thus, by mixing the straight fibers and the non-straight fibers, it is possible to suppress the occurrence of lashes of the eyelashes, suppress the generation of hijiki eyelashes, and suppress the pain of the background. In addition, when straight fibers and non-straight fibers are mixed, the retention (adhesiveness) of the mascara liquid to the brush portion is improved, and reattachment of the liquid can be reduced.

  A brush for cosmetics according to the present invention made to achieve the above object is a brush for cosmetics having a brush part attached to a support, and the brush part has a conical tapered surface at a tip part. And a plurality of synthetic resin fibers are provided on the peripheral surface of the support so as to extend in at least two directions of the support radial direction, The synthetic resin fiber is provided on the peripheral surface in the axial direction of the support, and the support is composed of two or more twisted metal wires, and the synthetic resin fiber is a metal wire. It is characterized by being provided on the support body by being twisted between them and twisting a metal wire.

  Thus, when the support is a so-called twist brush, a plurality of synthetic resin fibers can be easily attached to the support. In particular, by using two metal wires, the outer diameter of the support can be reduced, the manufacturing can be facilitated, the cost can be reduced, and a small and inexpensive cosmetic brush can be provided to the user.

In addition, the brush part of the brush for cosmetics is desirably formed around the entire circumference of the support, and the entire shape of the brush part is formed in a columnar shape or a conical shape with a small tip. It is desirable that
Further, it is desirable that the plurality of synthetic resin fibers include a mixture of straight fibers and non-straight fibers. As in the case of the fiber bundle described above, by mixing the straight fibers and the non-straight fibers, it is possible to suppress the occurrence of eyelash lumps, suppress the generation of lashes and eyelashes, and suppress the pain of the background. In addition, when straight fibers and non-straight fibers are mixed, the retention (adhesiveness) of the mascara liquid to the brush portion is improved, and reattachment of the liquid can be reduced.

  A method for manufacturing a cosmetic brush according to the present invention made to achieve the above object is a method for manufacturing the cosmetic brush, the step of bundling synthetic resin fibers and manufacturing a brush portion on a support. The brush part is immersed in a solution tank containing a solution, the brush part is moved up and down from above the abrasive rubbing blade and rotated, and the brush part is brought into contact with the abrasive rubbing blade for a predetermined time, And a step of dissolving and swelling the surface of the synthetic resin fiber and peeling the surface with the abrasive rubbing blade to form the tapered surface.

  In this way, the brush part is immersed in a solution tank containing a solution, the brush part is moved up and down from above the abrasive rubbing blade and rotated, and the brush part contacts the abrasive rubbing blade for a predetermined time. And having the step of dissolving and swelling the surface of the synthetic resin fiber and stripping with the abrasive rubbing blade to form the tapered surface, the brush hair attached to the periphery of the support, A tapered surface can be easily formed.

  ADVANTAGE OF THE INVENTION According to this invention, the brush for cosmetics in which the front-end | tip taper-shaped brush hair was provided around the radial direction of a support body, and its manufacturing method can be obtained.

FIG. 1 is a cross-sectional view showing a cosmetic using a brush for cosmetics according to the present invention. 2A and 2B are views showing an application body of a brush for cosmetics according to the present invention, in which FIG. 2A is a cross-sectional view and FIG. 2B is a side view. FIG. 3 is a front view of a cosmetic brush application body according to the present invention. FIG. 4 is a perspective view of a cosmetic brush application body according to the present invention. 5A and 5B are diagrams showing synthetic resin fibers (brush hairs), wherein FIG. 5A is a diagram showing fibers (brush hairs) having a tapered surface, and FIG. 5B is a fiber having no tapered surfaces. It is a figure which shows (brush hair). FIG. 6 is a view showing a modified example of synthetic resin fibers (brush hairs). FIG. 7 is a view showing a synthetic resin fiber (brush hair) in which an uneven portion is formed on a tapered surface. FIG. 8 is a diagram showing a brush portion having an overall shape formed in a columnar shape. FIG. 9 is a diagram showing a brush portion having an overall shape formed in a conical shape. FIG. 10 is a schematic view showing the steps of the manufacturing method according to the present invention. FIG. 11 is an enlarged view of a main part of the abrasive sliding contact body shown in FIG. FIG. 12 is a diagram showing the abrasive rubbing blade shown in FIG. FIG. 13 is a schematic view showing a conventional brush for a cosmetic tool.

One embodiment of a brush for cosmetics according to the present invention will be described with reference to FIGS. 1 to 5.
Cosmetics for which the brush for cosmetics according to the present invention is used are, for example, eyeliner, mascara, nail polish, lipstick, hair dye, and the like. In the present embodiment, mascara having fluidity will be described as an example.
As shown in FIG. 1, the cosmetic tool A is immersed in a container body 10 containing a coating liquid K as a liquid, a cap 20 screwed into the container body 10, and the coating liquid K in the container body 10. And an application unit 30 including the brush unit 3.

The container body 10 is formed in a bottomed cylindrical shape having a neck 11, and a predetermined amount of a coating liquid K having fluidity made of mascara is accommodated in the container body 10.
Examples of the coating liquid K include 0.1 to 2% by mass as a viscosity modifier, 0.5 to 30% by mass of a film forming agent, and 0.5 to 30 of a pigment having an average particle diameter of 1 μm or more. Containing 0.1 to 2% by mass of a dispersant, 0.1 to 2% by mass of a surfactant, and 0.1 to 2% by mass of a surfactant, at an EHD viscometer temperature of 25 ° C. and a shear rate of 3.83 S ⁻¹ Those having a viscosity in the range of 2 to 10 Pa · s are used.
A neck portion 11 having an elongated cylindrical opening 12 is integrally formed on the upper portion of the container body 10 upward, and a fastening screw portion 13 is threaded in the circumferential direction on the outer peripheral surface of the neck portion 11. The screw portion 21 on the inner peripheral surface of the cap 20 is detachably screwed to the screw portion 13 of the neck portion 11.

  The ironing body 25 is inserted into the opening 12 of the container body 10. The ironing body 25 is made of a material having flexibility and viscoelasticity, and is basically formed in a substantially cylindrical shape, and its diameter (opening width) is from the vicinity of the upper end (one end) to the lower portion (the other end). ) The diameter is gradually reduced as it goes to. Further, a ring-shaped flange 26 protrudes radially outward from the upper end of the ironing body 25, and this flange 26 is locked to the opening peripheral edge of the neck 11 of the container body 10.

The application unit 30 includes an application shaft 31 and an application body 1, and the application body 1 for attaching the content liquid is attached to the tip of the application shaft 31.
Specifically, the rod-like support body 2 of the application body 1 is fixed to the attachment hole 31a formed on the tip end side of the application shaft 31 by fitting or the like.

Furthermore, the said application body 1 is demonstrated based on FIG. 2 thru | or FIG.
As described above, the application body 1 is a fiber composed of the support body 2 attached to the attachment hole 31a formed on the distal end side of the application shaft 31, and a plurality of synthetic resin fibers 3a extending in the radial direction of the support body 2. The bundle 3 </ b> A includes a radial peripheral surface of the support 2 and a plurality of brush portions 3 arranged in the axial direction. In this embodiment, three brush portions 3 are provided at asymmetrical positions on the circumferential surface of the support 2 in the radial direction.
The brush portion 3 is formed by implanting a fiber bundle 3A composed of a plurality of synthetic resin fibers 3a in a flocking hole 2a of the support 2. The flocking hole 2a is formed at a plurality of locations in the circumferential direction and the axial direction of the support 2, and the fiber bundle 3A is implanted in each flocking hole 2a, so that the fiber bundle 3A becomes the circumferential direction of the support 2 and A plurality of brush portions 3 arranged in the axial direction can be provided. The outer diameter of the brush part 3 is preferably 6 to 8 mm, for example.

  The support 2 is made of a resin such as a polypropylene resin, a polyacetal resin, or a polyoxymethylene resin, and has a diameter of 0.5 to 4.0 mm and a length of 10 to 30 mm, for example. The fiber bundle 3A can be implanted to the support 2 by welding or adhesion.

Further, the synthetic resin fibers 3 a implanted in the support 2 are formed to a length of 1.0 mm to 5.0 mm from the surface of the support 2.
As a material of the synthetic resin fiber 3a constituting the brush part 3, polyamide resin such as 6,6-nylon, 6-nylon, 12-nylon, 6,10-nylon, 6,12-nylon, polyethylene, Polyolefin resins such as polypropylene, and polyester resins such as polyethylene terephthalate, polybutylene terephthalate, and polytrimethylene terephthalate are used.

As this synthetic resin fiber 3a, a fiber having a diameter of 0.03 mm to 0.18 mm, preferably 0.05 mm to 0.12 mm can obtain an appropriate elasticity, and also has an effect of suppressing bending or bending. Therefore, it can be suitably used as a brush.
In addition, the said diameter is a diameter of a cylindrical part (part in which the taper surface 3a1 mentioned later is not formed). Further, the synthetic resin fiber 3a may have an elliptical shape, a star shape, an eyebrow shape, a cross shape, or a polygonal shape in addition to a columnar shape.

  In addition, the number of fibers in one bundle (fiber bundle 3A) in which synthetic resin fibers 3a are assembled can be set as appropriate, but is usually planted in one flocking hole 2a (see FIG. 2 (a)). As the number, 5 to 30 can be suitably used. Moreover, although the number of fiber bundles 3A to be planted can be appropriately set, what is normally planted at 5 to 20 sites can be suitably used.

  In the present embodiment, as shown in FIG. 3, fiber bundles 3 </ b> A composed of a plurality of synthetic resin fibers 3 a are provided at three locations on the circumferential surface of the support 2 in the radial direction, and the axial direction of the support 2 is further provided. It is characterized by being provided in. That is, the fiber bundle 3A is provided on the peripheral surface of the support so as to extend in three directions in the support radial direction, and further, the fiber bundle is provided on the peripheral surface in the axial direction of the support. It is characterized by being.

Furthermore, as shown in FIGS. 2 and 4, in this embodiment, nine places are arranged in a row in the axial direction of the support 2.
Therefore, in this embodiment, a total of 27 fiber bundles 3A are implanted in the circumferential direction and the axial direction of the support 2.
The number of fiber bundles 3A implanted in the peripheral surface direction and the axial direction of the support 2 is not limited to the above 27, and can be increased or decreased as necessary.

As shown in the schematic diagram enlarged in FIG. 5, the synthetic resin fiber 3a constituting the brush portion 3 is formed such that the diameter is gradually reduced toward the tip, and a tapered surface 3b1 is formed at the tip. The tapered fiber (specific synthetic resin fiber) 3b is included.
The taper surface 3b1 length X of the taper fiber 3b is formed in a range of 0.5 to 4 mm from the tip of the synthetic resin fiber.

Further, the length dimension X from the tip of the synthetic resin fiber of the tapered surface and the length dimension X + Y from the tip of the synthetic resin fiber of the mascara brush to the surface of the mascara brush head (surface of the mascara brush support 2) The taper ratio (the length dimension of the tapered surface) that is a percentage of the length dimension Y of the non-tapered surface on which the tapered surface is not formed from 2A1 (synthetic resin fiber planting surface) and the length dimension X. The length dimension X + Y) from the tip of the synthetic resin fiber of X / mascara brush to the surface of the mascara brush head is formed within a range of 10 to 80%.
The tapered fibers 3b are formed to occupy 80% or more of the total number of all synthetic resin fibers constituting the brush.
In addition, 30% or less of the fibers outside the range of the taper fiber 3b described above may be included, or as shown in FIG. 5B, 30% or less of the fiber 3c having no tapered surface may be included. good. These 30% or less fibers are preferably the same material and the same diameter as the tapered fibers 3b in terms of production.

The reason why the taper surface 3b1 length X of the tapered fiber 3b is formed in the range of 0.5 to 4 mm from the tip of the synthetic resin fiber is to allow the fiber to easily enter between each eyelash. .
Here, when the taper surface 3b1 length X is less than 0.5 mm, the taper distance is short, and it is difficult to enter between the eyelashes one by one. On the other hand, when the length X of the taper surface 3b1 exceeds 4 mm, the stiffness (rigidity) of the fiber becomes weak and loses the stiffness (rigidity) of the eyelashes. It is not preferable because the upper eyelashes are pushed up and the lower eyelashes are pushed down, making it difficult to curl both eyelashes.

  In addition, when the taper ratio is less than 10%, the bending strength is strong, the taper fiber 3b dispels the eyelashes, and it becomes difficult for the fibers to enter between each eyelash. On the other hand, when the taper ratio exceeds 80%, the taper fiber 3b is bent halfway, making it difficult for the fiber to enter the back of the eyelashes, further pushing up the upper eyelashes, pushing down the lower eyelashes, etc. Is difficult to curl.

Furthermore, the brush portion 3 is formed so that the number of the tapered fibers 3b occupies at least 80% of the total number of fibers.
When the number of the tapered fibers 3b is less than 70% of the total number of fibers, the above-described effect of the tapered fibers 3b cannot be obtained sufficiently, which is not preferable.

As shown in FIG. 3, the brush portion 3 configured in this manner includes a large amount of taper fibers 3 b, and as shown in FIG. The waist strength (bending strength) can be increased toward the support 2 side), and the feeling of use can be improved.
That is, when applying mascara, the tip of the taper fiber 3b easily enters between the eyelashes. In addition, the waist strength (bending strength) can be increased toward the taper surface 3b1 and further toward the straight body portion 3b2, so that the fibers between each eyelash without losing the stiffness of the eyelashes. The eyelashes can be easily applied to each eyelash, and after application, the upper eyelashes can be pushed up or the lower eyelashes can be pushed down, and both eyelashes can be curled firmly.
Furthermore, since the tip is thin with a taper fiber, it is possible to prevent excessive application of the liquid in addition to having good skin contact with the base of the eyelashes and the skin.

As shown in FIG. 6A, the synthetic resin fiber 3a (tapered fiber 3b) may be formed on a curved surface 3d that is curved in a concave shape in the axial direction, and is flat at the tip. The flat portion 3e may be formed. Further, as shown in FIG. 6B, the tapered surface 3b1 may be formed up to the lower end without having the straight body portion 3b2, and the curved surface portion 3f may be formed at the tip. . Further, as shown in FIG. 6C, a sharp pointed portion 3g may be formed at the tip of the tapered fiber 3b.
Further, as shown in FIG. 6D, the synthetic resin fiber 3a (tapered fiber 3b) may form a plurality of tapered surfaces 3j1, 3j2, 3j3.
The dimensional relationship between the tapered surfaces 3j1, 3j2, 3j3 is, for example, when the cross-sectional area of the synthetic resin fiber 3a (3b) shown in FIG. 6D on the support surface 3k1 is 1, the upper end of the tapered surface 3j1. The overall shape of the fiber is tapered so that the cross-sectional area at the portion 3k2 is 0.8 to 0.9 and the cross-sectional area at the upper end portion 3k3 of the tapered surface 3j2 is 0.2 to 0.4. To be decided. The tapered surface 3j1 may be a straight body portion 3b2 and may be two tapered surfaces 3j2 and 3j3.
Furthermore, as shown in FIG. 6 (e), the synthetic resin fiber 3a may be a non-straight fiber having a curved fiber axis, so-called crimp fiber 3l. The degree of curvature 3lt of the crimp fiber 3l is preferably about 3 to 4 times the fiber diameter. Further, when a tapered surface is formed on the crimp fiber 31, it is preferable to perform a process of forming a tapered surface after crimping (processing into a shape in which the axis is curved).
The distance between the eyelashes, the length and thickness of the eyelashes, and the like vary depending on the user, so the mascara feel is improved by selecting the optimal fiber shape and tapered tip shape according to the characteristics of each eyelash.

Further, as shown in FIG. 7, the surface of the synthetic resin fiber having the tapered surface is formed with a convex portion 3h and a concave portion 3i, and the average depth of the concave portion 3i (from the top of the convex portion 3h to the bottom surface of the concave portion). The length t1 is formed to be 0.01 to 10 μm.
When the average depth t1 of the concave portion 3i is less than 0.01 μm, the synthetic resin fiber surface on which the tapered surface is formed is smooth with almost no irregularities, so that it is difficult to hold the liquid by the concave portion 3i. , Good applicability cannot be obtained.
On the other hand, when the average depth t1 of the concave portion 3i exceeds 10 μm, the rigidity of the fiber decreases, and the liquid applicability decreases, for example, the liquid is excessively accumulated in the concave portion and the liquid transfer to the eyelashes is suppressed. It is not preferable.
Therefore, when the average depth t1 of the concave portion 3i is 0.01 to 10 μm, it is desirable because the liquid retention of the fiber is good and the rigidity of the fiber is also good.

Further, an average interval t2 between the convex portions in the convex 3h is formed to be 10 to 70 μm.
When the average interval t2 between the convex portions is less than 10 μm, the number of concaves and convexes increases, the fiber surface becomes rough, liquid separation from the concave portions becomes worse, and the contact with the skin becomes worse, which is not preferable.
On the other hand, when the average interval t2 between the convex portions exceeds 70 μm, the number of concaves and convexes is small, and the liquid holding effect is lowered.
Therefore, when the average interval between the convex portions in the convex portion 3h is 10 to 70 μm, it is desirable because the liquid retainability is good and the contact with the skin is also good.

The convex portions 3h and concave portions 3i on the fiber surface can be formed by mixing fine particles such as titanium oxide with a fiber material to form irregularities on the fiber surface. However, the presence of foreign matter reduces the rigidity of the fiber. Moreover, since there is a concern that the fine particles may fall off with use, it is not preferable.
In addition, when a blast treatment is performed to form convex portions 3h and concave portions 3i by causing fine particles to collide with the fiber surface on which the tapered surface is not formed, and then the tapered surfaces are formed, the convex portions 3h and concave portions 3i are formed. May disappear, or the fibers may be cut from the recesses 3i. On the other hand, blasting after forming the tapered surface is not preferable because damage to the tapered surface is large and it becomes difficult to use it for a mascara brush.
As a method of forming the convex portion 3h and the concave portion 3i, it is more preferable to form the convex portion 3h and the concave portion 3i by a manufacturing method described later.

Moreover, it is desirable in the manufacturing method mentioned later that the synthetic resin fiber which has a taper surface is formed with a polyamide-type resin. In the manufacturing method described later, the fiber surface of the polyamide-based resin is easy to make the fiber semi-swelled in the solution, and only the necessary portions can be selectively peeled off with an abrasive rubbing body. Since it is easy to create the convex part 3h and the concave part 3i of arbitrary shapes, it is preferable.
In addition, since the polyamide-based resin has a good affinity with water, all synthetic resin fibers including a synthetic resin fiber having a tapered surface may be used to form a mascara brush using a polyamide-based resin. good.

In the said embodiment, the said brush part 3 implants the fiber bundle 3A which consists of several synthetic resin fiber 3a by welding or adhesion | attachment to the circumferential surface of the radial direction of the said support body 2, and several places of an axial direction. Explained the case.
The brush portion 3 according to the present invention is not limited to the above case. For example, as shown in FIG. 8, a plurality of synthetic resins are provided at predetermined intervals between the metal wires 4A and 4B. A fiber bundle 3A made of the fibers 3a may be arranged and the fiber bundle 3A (tapered fiber 3b) may be fixed by twisting the wire rods 4A and 4B. Further, the number of metal wires may be two or more as in 4A and 4B, and may be formed of three or more wires.
Also in the case of such a so-called twisted brush, a fiber bundle 3A composed of a plurality of synthetic resin fibers 3a (tapered fibers 3b) extending in the radial direction of the wires 4A, 4B is used as the wires 4A, 4B (support 2). ) In the longitudinal direction (axial direction).

Further, as shown in FIG. 8, the brush portion 3 has a diameter D1 of the brush portion 3 attached to the front end side of the support body 2 and a diameter D2 of the brush portion 3 attached to the rear end side of the support body 2. Are formed in a substantially cylindrical shape as a whole.
Moreover, as shown in FIG. 9, the diameter D2 of the brush part 3 attached to the rear end side of the support body 2 was formed larger than the diameter D1 of the brush part 3 attached to the front end side of the support body 2. You may form in a cone shape as a whole. Furthermore, as a modification, the support 2 may not be linear with respect to the axis, but may have an arc shape that is curved in accordance with the arrangement of eyelashes.

Next, based on FIG. 10 thru | or FIG. 12, one Embodiment concerning the manufacturing method of this invention is described.
First, as shown in FIG. 10, a predetermined number of synthetic resin fibers 3 a having a predetermined length are bundled and attached to the support 2 to form the brush portion 3.
As described above, the synthetic resin fiber 3a may be attached to the support 2 or may be adhered or welded to the support 2, and the synthetic resin fiber 3a is sandwiched between the metal wires 4A and 4B1. The wire rods 4A and 4B may be attached by twisting.

Next, the taper process of the synthetic resin fiber 3a of the brush part 3 is performed.
The taper process is performed while polishing and rubbing while swelling the synthetic resin fibers using a treatment liquid that is soluble or swellable with respect to the synthetic resin fibers 3a. 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.
In addition, when the brush part 3 is comprised by a crimp fiber, it is preferable to perform this taper process, after crimping the synthetic resin fiber 3a (processed in the shape in which the axis line curved).

The taper treatment of synthetic resin fibers using such a treatment liquid will be described by taking as an example the case of using nylon fibers which are one of polyamide fibers.
In this processing method, as shown in FIG. 10, a processing apparatus in which a plurality of solution tanks are arranged in series is used as indicated by reference numerals 50A, 50B, and 50C. In the case of this treatment method, as each treatment liquid used for polishing rubbing / washing of nylon fibers, metacresol or saturated calcium chloride / methanol solution is used as the solution in the first solution tank 50A, and the second solution tank 50B. A solution of 15% (by weight) calcium chloride and 85% (by weight) of methanol is used as the solution for the solution, and methanol (100%) is used as the cleaning solution in the cleaning solution tank 50C.

Further, in the first solution tank 50A and the second solution tank 50B, there are provided abrasive rubbing bodies 52 for grinding and rubbing the nylon fibers of the brush portion 3 to process them into a tapered shape. As shown in FIGS. 11 and 12, the abrasive rubbing body 52 includes a thin disk-shaped abrasive rubbing blade 53 and a large number of the abrasive rubbing blades 53 arranged in parallel at a predetermined interval. A rotating shaft 54 and a spacer 55 disposed between the abrasive rubbing blades 53.
And at least a part of the abrasive rubbing body 52 (the abrasive rubbing blade 53) is disposed so as to be immersed in the solution tank. Although the abrasive rubbing body 52 is also disposed in the cleaning tank 50C, since the cleaning liquid is non-swellable with respect to the nylon fiber, the abrasive rubbing is hardly performed in this portion.

  When processing the brush portion 3 using the above apparatus, first, the brush portion 3 is rotated (indicated by an arrow R in the figure) and moved up and down from above the abrasive rubbing body 52 (indicated by an arrow Y in the figure). Display) or / and while the abrasive rubbing body 52 is moved back and forth (indicated by an arrow X in the figure), the abrasive rubbing body 52 is moved from the back side to the front side of the paper (in the horizontal direction in FIG. 12). The brush portion 3 is brought into contact with the blade 53 for a predetermined time.

At this time, the solution in the first solution tank 50 </ b> A adheres to the brush portion 3, so that the surface of the nylon fiber is dissolved and swelled and is peeled off by the abrasive rubbing blade 53.
That is, as shown in FIG. 12, since the abrasive rubbing blade 53 is formed with a serrated blade 53a, the abrasive rubbing blade 53 contacts the fibers 3a of the brush portion 3 so as to put a comb, Repeat melting and rubbing. At this time, the brush unit 3 is controlled by controlling the speed of the vertical movement of the brush unit 3, the moving speed from the back side to the front side of the paper in FIG. The nylon fiber which comprises is processed into a taper shape. Moreover, the front-end | tip part of the brush part 3 is made into the taper shape which becomes thin as it goes to a front-end | tip part.

  Although the abrasive rubbing blade 53 may be fixed, the abrasive rubbing blade 53 is moved up and down and moved from the back side of the paper surface to the front side of the paper surface in FIG. The blade 53 may be formed so as to rotate. Further, the nylon fiber was processed into a taper shape by moving the brush part 3 up and down and moving in the lateral direction (in the front-rear and left-right directions in FIG. 12) from the back side to the front side in FIG. Nylon fiber may be processed into a taper shape by rotating it back and forth, moving up and down, and rotating it without performing lateral movement as described above.

Next, the brush part 3 is moved to the second solution tank 50B, moved up and down and rotated, and the brush part 3 is again brought into contact with the abrasive rubbing body 52 for a predetermined time. 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 vertical and rotational speeds of the brush part 3, the nylon fiber 3a constituting the brush part 3 is made into a fiber 3b having a tapered surface 3b1 as shown in FIG.

And finally, it moves to 50 C of washing tanks, the fiber part 3b is wash | cleaned by making the brush part 3 contact the grinding | polishing rubbing body 52 for the predetermined time, and the process of the brush part 3 is complete | finished.
In the above-described method, the vertical movement (movement distance), rotational movement, and movement of the brush unit 3 from the back side to the front side in FIG. 10 (in the horizontal direction in FIG. 12) are controlled. Thereby, as shown in FIG. 7, a plurality of bead-shaped convex portions 3h can be formed on the surface portion of the tapered surface 3b1 in the axial direction of the fiber. At this time, a recess 3i is formed between the protrusion 3h and the protrusion 3h. That is, in the axial direction of the fiber, the concavo-convex portions are alternately and continuously arranged by the bead-shaped convex portions 3h and the concave portions 3i.

Next, the 1st modification concerning the manufacturing method of this invention is demonstrated.
In one embodiment of the manufacturing method, the fiber 3a is tapered using the abrasive rubbing body 52 in order to process it into a tapered shape, but this modification is formed in a cylindrical shape and has an inner peripheral surface. The fiber 3a is tapered using a die provided with an abrasive rubbing body.
A plurality of the abrasive rubbing bodies protrude in a radial direction of the die and are arranged at a predetermined interval in the circumferential direction of the die. The shape of the abrasive rubbing body is such that the outer periphery where the brush portion 3 contacts is a sharp surface or a non-sharp surface, and the fiber 3a can be processed if a constant load is applied to the fiber constituting the rotating brush 3. It has a structure.
Further, the abrasive rubbing body may be one in which a single flat plate is implanted, and may further have a hole in the flat plate or a shape having only an outer frame.

Also in this processing method, as described in the above embodiment, a processing apparatus in which the first to third solution tanks are arranged in series is used, and the dissolved solution in the first solution tank 50A is metacresol or saturated. A solution of calcium chloride / methanol, a solution of 15% (weight) calcium chloride and 85% (weight) of methanol in the solution in the second solution tank 50B, and methanol (100%) in the cleaning liquid in the cleaning liquid tank 50C. Used respectively.
Further, it is sufficient that a part or all of the dice are disposed in the first to third solution tanks.

Then, a predetermined number of synthetic resin fibers 3 a having a predetermined length are bundled and attached to the support 2 to form the brush portion 3, which is then moved to the first solution tank and polished and rubbed in the die. The brush portion 3 is brought into contact with the blade for a predetermined time.
At this time, the solution in the first solution tank 50A adheres to the brush portion 3, so that the surface of the nylon fiber is dissolved and swelled and peeled off by the abrasive rubbing blade. After that, polishing and cleaning are performed with dies in the second and third solution tanks, the fiber 3b having the tapered surface 3b1 is included at the tip of the synthetic resin fiber 3a, and the columnar brush portion 3 is formed as an overall shape. It is formed.
Further, in the first modification, the die (polishing rubbing blade) is disposed outside the solution tank, and after part or all of the bristles of the brush 3 are immersed in the solution tank, the die (polishing) outside the solution tank. Even if the brush 3 is brought into contact with the rubbing blade), the same processing can be performed.

Next, a second modification according to the manufacturing method of the present invention will be described.
In the die of the first modified example, the abrasive rubbing body protrudes by a certain amount in the radial direction of the die and is arranged in a plurality with a predetermined interval in the circumferential direction of the die. In the second modified example, the inner peripheral surface of the cylindrical die is tapered from the upper surface toward the central portion (and is tapered from the lower surface toward the central portion), and It is characterized in that a step portion (abrasive rubbing blade portion) for stripping off the dissolved and swollen resin is provided on the peripheral surface.

  Also in the second modified example, similarly to the first modified example, a processing apparatus in which the first to third solution tanks are arranged in series is used. For the solution in the first solution tank 50A, Metacresol or saturated calcium chloride / methanol solution, a solution of 15% (weight) calcium chloride and 85% (weight) of methanol in the solution of the second solution tank 50B, and methanol ( 100%) are used respectively. Further, it is sufficient that a part or all of the dice are disposed in the first to third solution tanks.

Then, a predetermined number of synthetic resin fibers 3 a having a predetermined length are bundled and attached to the support 2 to form the brush portion 3, which is then moved to the first solution tank, and a step portion (abrasive rubbing blade) ) Is brought into contact with the brush portion 3 for a predetermined time.
At this time, the solution in the first solution tank 50A adheres to the brush portion 3, so that the surface of the nylon fiber is dissolved and swelled and is peeled off by the stepped portion (abrasive rubbing blade). Thereafter, polishing and cleaning are performed with dies in the second and third solution tanks, and the tip 3 of the synthetic resin fiber 3a includes the fiber 3b having the tapered surface 3b1, and the conical brush portion 3 is formed as an overall shape. It is formed.
Also in the second modification, as in the first modification, the die (abrasive rubbing blade) is disposed outside the solution tank, and after some or all of the bristles of the brush 3 are immersed in the solution tank, Even if the brush 3 is brought into contact with the die (abrasive rubbing blade) outside the tank, the same processing can be performed.

By using such a specific manufacturing method, a fiber bundle including a plurality of synthetic resin fibers having a conical tapered surface formed at the tip portion and made of a plurality of synthetic resin fibers is supported by the support. It is possible to obtain a brush for a cosmetic tool that includes brush portions that are formed in at least three locations on the circumferential surface of the body in the radial direction and further formed in the axial direction.
This cosmetic brush can be applied to, for example, eyeliner, nail polish, lipstick, hair dye and the like in addition to the mascara brush for the eyes.

Furthermore, the brush which can suppress the generation | occurrence | production of lashes of an eyelash, can suppress the generation | occurrence | production of a hijiki eyelash, and examined the brush which does not hurt the background. That is, a use experiment was conducted when the fiber bundle was a mixture of straight fibers, non-straight fibers (crimp fibers), and both.
The straight fiber refers to a fiber having a straight fiber axis, and the non-straight fiber (crimp fiber) refers to a fiber having a curved fiber axis. Moreover, although this invention is demonstrated further more concretely based on experiment, this invention is not restrict | limited by this.

  The brush part was planted by adhering a fiber bundle made of 5 to 10 6-nylon fibers to the flock hole of the support. The flocking holes are formed at 30 to 45 locations in the circumferential direction and the axial direction of the support, and the fiber bundle is implanted in each flocking hole, so that the fiber bundle is 30 to 45 in the circumferential direction and the axial direction of the support. Several brush portions were formed. The fiber bundle was formed to a length of 3 mm from the surface of the support, and the outer diameter of the brush part 3 was 8 mm.

  As the 6-nylon fibers, straight fibers having a taper ratio of 10 to 30% and crimp fibers obtained by crimping straight fibers having a taper ratio of 15 to 35% are used, and the mixing ratio is shown in Table 1. I made it. Moreover, the sample which changed the fiber diameter of each fiber with 2.5 mil (about 0.0635 mm), 3.5 mil (about 0.0762 mm), and 4 mil (about 0.00.1016 mm) was used.

The mascara liquid used for the evaluation was 0.6% by mass of synthetic smectite (Lucentite SWN, manufactured by Corp Chemical Co.) as a viscosity modifier, and xanthan gum (Echo Gum GM, manufactured by DSP Gokyo Food & Chemical Co.) as a viscosity modifier. 4% by mass, 25% by mass of an alkyl acrylate copolymer (Yodosol GH800F, manufactured by Akzo Nobel) as a film forming agent, 3% by mass of carbon black (average particle size 0.2 μm, LC902, manufactured by LCW) as a pigment, silica 3% by mass of particles (silica microbead P-500, manufactured by JGC Catalysts & Chemicals), 1% by mass of polyoxyethylene behenyl ether (BB-30, manufactured by Nikko Chemicals) as a surfactant, nylon fiber (NFBR-10D-2T) , Manufactured by Daito Kasei Kogyo Co., Ltd.) 5% by mass, preservatives (methyl paraben, ethyl para Ben, mixture) a suitable amount of phenoxy ethanol, 1,3-butanediol 10 wt%, with mascara in which the residue purified water.
This mascara liquid had a viscosity of 2 to 10 Pa · s at a temperature of 25 ° C. and a shear rate of 3.83 S ⁻¹ as measured by an EHD viscometer.

The evaluation of the performance of the brush is that for the occurrence of lumps on the eyelashes, when mascara is applied to the eyelashes, the number of lumps generated is A for 2 or less, B for 3 to 5 and mascara for the occurrence of lashes. When applied to eyelashes, the number of elbow eyelashes is A within 2 places, B is 3-5 places, and when hitting the eyelashes, A does not hurt the skin when brushing the eyelashes with a brush. , B hurts. In addition, a hijiki eyelash means the eyelash state which the eyelashes adhered and became the lump shape.
The results of the experiment are shown in Table 1.

  Experiments show that when straight fibers and non-straight fibers are combined (mixed), the generation of eyelashes can be suppressed and the generation of hijiki eyelashes can be suppressed compared to the case of straight fibers only or non-straight fibers only. I found out that the skin is not painful.

DESCRIPTION OF SYMBOLS 1 Application body 2 Support body 2a Flocking hole 2b Locking piece 3 Brush part 3a Synthetic resin fiber 3b Fiber 3b which has a taper surface Tapered surface 3b2 Straight body part 3c Fiber 3A which does not have a taper surface Fiber bundle 4A of synthetic resin fiber 4B Metal wire rods 50A, 50B, 50C First to third solution layers 52 Abrasive sliding contact body 53 Abrasive sliding blade

Claims (8)

A brush for cosmetics having a brush portion attached to a support,
The brush part is
Including a plurality of synthetic resin fibers formed with a conical tapered surface at the tip,
A fiber bundle made of a plurality of synthetic resin fibers is provided on the peripheral surface of the support so as to extend in at least three directions of the support radial direction, and the fiber bundle further includes an axis of the support. The brush for cosmetics characterized by being provided in the surrounding surface of a direction. The support is composed of two or more twisted metal wires,
The brush for a cosmetic tool according to claim 1, wherein the synthetic resin fiber bundle is sandwiched between metal wires, and the metal wire is twisted to be provided on the support.   3. The cosmetic brush according to claim 1, wherein the fiber bundle includes a mixture of straight fibers and non-straight fibers. A brush for cosmetics having a brush portion attached to a support,
The brush part is
Including a plurality of synthetic resin fibers formed with a conical tapered surface at the tip,
And a plurality of synthetic resin fibers are provided on the peripheral surface of the support so as to extend in at least two directions of the support radial direction, and further, the synthetic resin fibers are arranged in the axial direction of the support. Provided on the circumference,
The support is composed of two or more twisted metal wires,
A brush for a cosmetic tool, wherein the synthetic resin fiber is sandwiched between metal wires and the metal wire is twisted to be provided on the support.   The cosmetic brush according to claim 4, wherein the plurality of synthetic resin fibers are a mixture of straight fibers and non-straight fibers.   The cosmetic brush according to any one of claims 1 to 5, wherein the brush portion is formed on the entire periphery of the peripheral surface of the support.   The cosmetic brush according to any one of claims 1 to 4, wherein the overall shape of the brush portion is formed in a columnar shape or a tip portion is formed in a conical shape having a small diameter. A method for manufacturing a cosmetic brush according to any one of claims 1 to 7,
Bundling synthetic resin fibers and producing a brush part on the support;
The brush part is immersed in a solution tank containing a solution, and the brush part is brought into contact with the abrasive rubbing blade for a predetermined time to melt and swell the surface of the synthetic resin fiber and is peeled off by the abrasive rubbing blade. And a step of forming the tapered surface.

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