JP5181774B2 - Brush ear - Google Patents

Description

  The present invention relates to a brush for applying powder or high-viscosity ink such as mascara or lip brush and other cosmetic liquids, handwriting correction liquids, cosmetic brushes, and lacquer ware. It relates to a smooth application brush.

  Traditionally, brushes such as brushes have used animal hair such as horses, deer, pigs, rabbits, foxes, chestnuts, rabbits, sheep, etc. The hardness and thickness of the brushes depends on the purpose of use and user preference. In order to adjust the length, etc., the types and combinations of the above animal hairs are changed into products. Generally, it is said that the quality of a brush head made only of animal hair having a long brush shape and a delicate surface state and elasticity at the tip is good. Representative examples are eyelashes, wool and eyelashes. However, since animal hair is a natural product, it is difficult to obtain a product with a constant quality, it is difficult to obtain an arbitrary size and shape, and there are problems such as low wear resistance. There is also the problem of higher prices due to a decrease in the yield of straw, straw and straw.

  In view of this, synthetic resin brush hair is used instead of animal hair forming the brush ears. In order to taper the tip of the synthetic resin fiber to form a synthetic resin brush like animal hair, a method of bringing the synthetic resin fiber into contact with a treatment solution for dissolving or decomposing has been proposed. (See Patent Document 1 and Patent Document 2).

By the way, a brush tip using a synthetic resin brush with a tapered tip has a problem that the holding power of the coating solution is low and a problem that the spout is poor when applied. In order to solve this problem, the hair of the animal hair and the synthetic resin brush with a tapered tip are mixed (see Patent Document 3) or wave-curved (crimped) with different wavelengths. Using a brush consisting of a large number of synthetic resin brushes (see Patent Document 4) and a synthetic resin brush with a tapered tip, blend straight brushes with large and small diameters and cross-sectional shapes. Have been proposed (see Patent Document 5).
Japanese Patent Publication No. 49-6159 (Claims). Japanese Patent Publication No. 60-30556 (column 3, line 24 to column 4, line 15). JP-A 63-102998 (claims). (Japanese Utility Model Laid-Open No. 62-114781 (claim of utility model registration)). Japanese Utility Model Laid-Open No. 4-124683 (utility model registration request).

  However, in the case of a mixture of animal hair and synthetic resin brush with a tapered tip, it must have the disadvantages of animal hair, and it is made of many synthetic resins with different crimp wavelengths. In the case of brushes, the space ratio tends to be large and the coatability is improved, but the feeling of use is weakened due to weakness and the space is large, so the touch becomes soft, and the surface coating is good, though it is included There was a problem that the scraping property of the liquid deteriorated. In addition, using a synthetic resin brush with a tapered tip, the brush head mixed with straight, large and small diameter brushes with an irregular cross-sectional shape has good scraping properties, but the coating solution The problem that it was easy to enter into the groove and the discharge of the coating solution was poor.

  The present invention is an application brush in which a plurality of types of filaments made of synthetic resin are mixed and bundled, and the arithmetic average height (Ra) is 10 nm to 30 nm on the surface of at least one type of filaments of the plurality of types of filaments, and The gist is that fine irregularities having a maximum height difference (Rz) of 120 nm to 300 nm were formed.

  The application brush according to the present invention is an application brush in which a plurality of types of filaments made of synthetic resin are mixed and bundled, and an arithmetic average height (Ra) is 10 nm to 30 nm on the surface of at least one type of filaments of the plurality of types of filaments. In addition, since fine irregularities having a maximum height difference (Rz) of 120 nm to 300 nm are formed, a coating brush that improves the retention and discharge of the coating liquid and smoothes the feeling during use can be obtained. Is.

  The present invention will be described below. In FIG. 1, reference numeral 1 is an application brush for a makeup brush. The application brush 1 is inserted and fixed to a front shaft 2, and the front shaft 2 is inserted and fixed to the front end of a shaft 3 to form a brush. Yes. In addition, the application brush 1 has a plurality of fine concave portions 4a and convex portions 4b that are partially different in shape on a tapered surface of the tip, and is arranged randomly and continuously without any gaps, and the concave portions 4a and the convex portions 4b. Are gathered in the longitudinal direction by using a filament 4 having a corner 4c formed thereon, a filament 5 having a crimped tip, and a straight filament 6 having a tapered tip, and the rear end is thermally welded or bonded. It is formed by being fixed by a method such as adhesion with an agent.

In addition, you may form the recessed part 4d curled toward the longitudinal direction of the filament 4 in the recessed part 4a of the said filament 4, or the convex part 4b. The coating liquid can also be held in the recessed portion 4d and can be applied for a long time.
In this embodiment, the application brush 1 for a cosmetic brush is described as an example, but the application brush 1 is not limited to this. For example, the application brush 1 is applied to filaments for mascara brushes, lip brushes, correction fluids, and lacquerware. May be.
Further, the configuration of the application brush 1 is described as a configuration in which filaments are bundled and the rear end portion is fixed by heat welding, adhesive, or the like. However, the configuration is not limited to this, and for example, the filament is made of metal. It is possible to apply to various configurations in which the core wire is arranged in a crossing manner between the core wires and the core wire is spirally wound.

  Synthetic fiber materials used for filaments include polyamide (6,6-nylon, 6-nylon, 12-nylon, 6,10-nylon, 6,12-nylon, etc.) polyester (polyethylene terephthalate, poly Butylene terephthalate, etc.), polyurethane, polyacrylonitrile, acrylonitrile-styrene copolymer, acrylonitrile-butadiene copolymer, etc. can be used, but the material of each filament may be the same or different.

A plurality of fine concave portions 4a and convex portions 4b having corners formed on the surface are arranged continuously and randomly without any gaps, and concave portions 4d that are scooped in the longitudinal direction by the concave portions 4a and convex portions 4b. As a commercially available product of the filament 4 formed with tie neck brush filament: Round type Thenon-smooth and random surface finish of Tynex natrafil code TYNF0901HN (material: nylon, manufactured by DuPont, USA).
In this example, the concave portion 4a formed with the corner portion 4c and the concave portion 4d that is bent in the longitudinal direction on the convex portion 4b are formed, but this is not always necessary. However, by forming the recessed portion 4d, the scraping property and the retention property of the coating liquid are improved.
Moreover, although the corner | angular part 4c in this example has comprised the obtuse angle and the acute angle, you may comprise circular arc shape partially. Further, the corners 4c having obtuse angles or acute angles are not necessarily required for the recesses and projections, but are preferably formed in many recesses and projections in consideration of the scraping property of the coating liquid.

In order to taper the tip of the synthetic resin fiber to form an application brush, as described above, a method using a treatment liquid is preferable. As a specific example, mixing of metacresol and calcium chloride-methanol solution with polyamide is preferable. A combination of a sodium hydroxide aqueous solution or the like may be used with respect to the liquid and polyester. However, the method is not necessarily limited to this method, and other methods such as, for example, applying a heat stretch to a synthetic resin fiber and drawing it into a tapered shape, or mechanically tapering such as grinder polishing may be adopted. .
This time, an example of a makeup brush has been described, but depending on the product to be manufactured, the filament may be used without being tapered. For example, a screw type mascara brush is an example.

  The diameter D (diameter) of the filament used in the application brush 1 varies depending on the production application or size (thickness and length), but the filaments 4, 5, and 6 in the application brush 1 for the makeup brush according to the present invention are as follows. 0.05 to 0.16 mm is preferably used. In addition, the diameter of a filament here means the diameter of the part which is not taper-processed.

Here, the purpose of using the filament 4 in which the concave portions 4a and the convex portions 4b are continuously formed on the surface and the corner portions 4c are formed on the concave portions 4a and the convex portions 4b is to remove the coating liquid. It is used for the purpose of improving the retainability and the dischargeability from the fine recess 4a. In this state, fine concave portions 4a and convex portions 4b are continuously formed on the surface of the filament, corner portions 4c are formed in the concave portions 4a and convex portions 4b, and the concave portions 4a and convex portions 4b are formed. It is preferable to form a recess 4d that is bent in the longitudinal direction. The reason is that the filament surface has no flat portion, and the fine concave portion 4a and the convex portion 4b in which the corner portions 4c are formed are continuously present without any gap, so that the coating liquid has a fine convex portion. It is easy to scrape off by 4b and the corner | angular part 4c, and is easy to be hold | maintained at the fine recessed part 4a. As a result, the coating liquid tends to adhere to the entire surface of the filament, and when coating, the coating liquid is well separated from the surface, that is, the discharge from the fine recesses is good and the coating liquid is applied. Can be easily transferred.
Incidentally, since the convex part of the filament having an irregular cross-sectional shape is continuous in the axial direction, the scraping property of the coating liquid of the convex part is good in the vertical direction of the axial direction, but in the axial direction, The scraping property is poor, and the filament surface is flat, so the scraping property and holding property are poor, so only a small amount of coating solution can be held, and it can be applied for a long time. Is a little inconvenient. In addition, there are filaments in which concave portions and convex portions are formed, but the distance between the concave portions and the convex portions is large, and the scraping property of the coating liquid is good, but the holding property is poor. That is, since the interval between the concave and convex portions is wide, the coating liquid is not held in the flat portion formed between the concave and convex portions.
The filament 4 preferably has a diameter in the range of 0.05 to 0.10 mm, and any number may be used within this range.

A plurality of fine concave portions 4a and convex portions 4b having corners formed on the surface are arranged continuously and randomly without any gaps, and concave portions 4d that are scooped in the longitudinal direction by the concave portions 4a and convex portions 4b. In the filament 4 in which the convex portion 4b is formed, the maximum height difference between the convex portion 4b and the concave portion 4a is preferably between 300 nm and 120 nm. The reason is that if the maximum height difference between the convex portion 4b and the concave portion a is 120 nm or less, the height difference is too fine and the scraping property of the coating liquid is deteriorated, and it is difficult to be held in the fine concave portion 4a. As a result, there is a problem that the coating liquid is difficult to adhere to the entire surface of the filament, and the discharge of the coating liquid is deteriorated. Further, if the maximum height difference between the convex portion 4b and the concave portion a is 300 nm or more, the height difference becomes too large, and the scraping performance of the coating liquid is good, but the height difference is large, so the variation in the scraping performance of the coating liquid is large. Or the coating solution easily enters the recess 4a, and the separation from the surface becomes worse when the coating solution is applied. As a result, the coating solution is difficult to uniformly adhere to the surface of the filament, and discharge is good in certain portions. This is because there is a problem that discharge is bad in a certain part.
In addition, a plurality of fine concave portions 4a and convex portions 4b each having a corner portion formed on the surface thereof are continuously and randomly arranged without any gaps, and concave portions that are scooped in the longitudinal direction by the concave portions 4a and the convex portions 4b. As for the filament 4 which formed the part 4d, arithmetic mean height of the height difference of the convex part 4b and the recessed part 4a is between 10 nm-30 nm. The reason is that if the arithmetic average height of the maximum height difference between the convex portion 4b and the concave portion a is 10 nm or less, the arithmetic average height of the maximum height difference is too fine, and the scraping property of the coating liquid is deteriorated. This makes it difficult for the coating liquid to be held in the concave portions 4a, and as a result, the coating liquid does not easily adhere to the entire surface of the filament, resulting in poor discharge of the coating liquid. Moreover, when the arithmetic average height of the maximum height difference between the convex portion 4b and the concave portion a is 30 nm or more, the arithmetic average height of the height difference becomes too large, and the scraping property of the coating liquid is good, but the arithmetic difference of the height difference. Since the average height is large, there is a large variation in the scraping property of the coating solution, the coating solution can easily enter the recess 4a, and the coating solution is applied to the surface of the filament. This is because the dispersion of the coating liquid occurs such that the liquid is difficult to adhere uniformly, and there is a large amount of ejection at a certain portion and poor ejection at a certain portion.

The filament 5 having crimps is used for the purpose of softening the coating solution retainability and the feeling of use, and various crimped states can be adopted. The diameter is preferably about 0.05 mm to 0.10 mm. The reason is that if the diameter is less than 0.05 mm, rough hair that is not tapered due to taper processing may be mixed in. If the diameter exceeds 0.10 mm, the skin feel at the time of application becomes hard and the feeling of use Because it gets worse.
The crimp pitch P of the filament 5 is preferably 1.0 mm to 6.0 mm, and the crimp height H is preferably 0.02 mm to 1.0 mm. In addition, any number of filaments may be used as long as the filament diameter D is in the range of 0.05 to 0.10 mm.

  The filament 6 having a circular straight cross-sectional shape is used for the purpose of improving the waist stability at the time of application and the collection of the brush head. The diameter is preferably about 0.05 mm to 0.16 mm. The reason is that if the diameter is less than 0.05 mm, rough hair without the taper may be mixed on the taper processing. If the diameter exceeds 0.16 mm, the waist at the time of application becomes hard. This is because the feeling of use becomes worse.

  The filament 7 having an irregular cross-sectional shape is used for the purpose of improving the retention of the coating liquid during coating. The diameter is preferably about 0.07 mm to 0.16 mm. The reason is that if it is less than 0.07 mm, the space ratio becomes too small and the retention of the coating liquid becomes poor. If the diameter exceeds 0.16 mm, the space ratio becomes too large and the coating brush 1 is collected. Because it gets worse.

  In manufacturing the coating brush 1 of the present invention, the surface is formed by continuously forming fine concave portions 4a and convex portions 4b on the surface, and at least a filament having corners 4c formed on the concave portions 4a and convex portions 4b. The rear end is welded and bonded, or the rear part is tied with a thread to prevent the filament from falling off, thereby forming the application brush 1. The mixed application brush 1 has fine concave portions 4a and convex portions 4b on the surface. Are formed continuously, and the filament 4 having the corner 4c formed in the concave portion 4a and the convex portion 4b, the filament 5 having a crimp, and the filament 6 having a straight cross-sectional shape are uniformly arranged with each other. Is preferred. The filament 4 used this time used three types of filaments including those in which fine concave portions 4a and convex portions 4b are continuously formed on the surface and corner portions 4c are formed on the concave portions 4a and convex portions 4b. However, the present invention is not limited to this, and it is possible to mix many types of filaments as long as fine concave portions 4a and convex portions 4b are continuously formed on the surface, and filaments in which corner portions are formed in the concave portions 4a and convex portions 4b are included. You may do it.

(Example)
Examples will be described below.
FIG. 1 shows a brush as an example of use of an application brush 1 for a cosmetic brush according to the present invention. Reference numeral 1 denotes an application brush 1, which is obtained by mixing filaments 4, 5, and 6 described later and welding the rear part thereof. The application brush 1 is inserted and fixed to the front shaft 2, and the front shaft 2 is inserted and fixed to the front end of the rear shaft 3 to form a brush.
The filament is tapered at the tip, and the concave portion 4a and the convex portion 4b are continuously formed on the surface, and the filament 4 in which the corner portion 4c is formed on the concave portion 4a and the convex portion 4b, and the tip is tapered. The filament 5 having a processed crimp and the filament 6 having a straight cross-sectional shape are used, but other conditions are shown in Table 1.

Examples 1-16
Table 2 shows the blended filaments of the application brushes of Examples 1 to 16 and Comparative Examples 1 to 20.

Using the application brushes for cosmetic brushes of Examples 1 to 16 and Comparative Examples 1 to 20 described above, a brush (blush) is formed as shown in FIG. A questionnaire survey was conducted.
Application test (questionnaire survey)
Method: We conducted a questionnaire survey on the usability of cheek brushes for women who were randomly selected.

[BRIEF DESCRIPTION OF THE DRAWINGS] It is a front view of the brush with which the application brush of one Example of this invention was mounted | worn. It is an expansion schematic diagram of a filament. The enlarged schematic diagram of the filament 4 which formed the fine recessed part and the convex part continuously on the surface, and formed the corner | angular part in these recessed part and convex part. It is an expansion schematic diagram of the filament which has a crimp. Cross-sectional view of filament 7 having a different cross-sectional shape (A) Front view showing a modification of the tip of the application brush (b) Front view showing a modification of the tip of the application brush Screw type mascara brush according to the present invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Application brush 2 Front shaft 3 Rear shaft 4 The filament which formed the fine recessed part and the convex part continuously on the surface which tapered the front-end | tip, and formed the corner | angular part in these recessed part and convex part 5 Crimp which tapered the front-end | tip Filaments 6 Filaments with a straight cross-sectional shape with a tapered tip 7 Circular filaments with a tapered cross-sectional shape with a tapered tip

Claims (9)

In an application brush in which a plurality of types of filaments made of synthetic resin are mixed and bundled, the arithmetic average height (Ra) is 10 nm to 30 nm on the surface of at least one type of the plurality of types of filaments, and the maximum height difference ( A coating brush characterized in that fine irregularities having a Rz) of 120 nm to 300 nm are formed. The application brush according to claim 1, wherein corners are formed in the fine recesses and / or protrusions. The coating brush according to claim 1, wherein a concave portion that is rolled in the longitudinal direction is formed in the fine concave portion and / or convex portion. The coating brush according to any one of claims 1 to 3, wherein a filament having a crimp is mixed in the filament. The coating brush according to any one of claims 1 to 4, wherein the filament is mixed with a filament having an irregular cross-sectional shape. The coating brush according to any one of claims 1 to 5, wherein a filament having a circular straight cross section is mixed with the filament. The coating brush according to any one of claims 1 to 6, wherein three kinds of filaments, a filament having a crimp in the filament and a filament having a straight cross section are circular are mixed. The coating brush according to any one of claims 1 to 7, wherein three types of filaments, a filament having an irregular shape in cross section and a filament having a straight cross section are circular are mixed. The coating brush according to any one of claims 1 to 8, wherein a conical taper process is applied to the first filament.

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