JP5760707B2 - Brush ear - Google Patents

Description

  The present invention is a coating brush in which the tips of a plurality of types of filaments made of synthetic resin are tapered, and the filaments are mixed and bundled. Especially, the application brush is a cosmetic liquid such as an eyeliner or nail, a handwriting correction liquid, and an adhesive. The present invention relates to an application brush used for a quick-drying applicator that can quickly dry a viscosity application liquid or ink.

  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 is a problem of low wear resistance. There is also the problem of high prices due to a decrease in the yield of straw.

  Thus, synthetic resin brushes are used instead of animal hairs that form brush ears. In order to taper the tip of the synthetic resin to make a synthetic resin brush such as animal hair, a method of bringing a synthetic resin fiber into contact with a treatment solution for dissolving or decomposing has been proposed. (See Patent Document 1 and Patent Document 2)

  However, a brush tip using a synthetic resin brush with a tapered tip has a problem that the holding power of the cosmetic is low and a problem that the feeling of use is hard and bad when applied. In order to solve this problem, a brush ear (refer to Patent Document 3) in which animal hair and a synthetic resin brush with a tapered tip are mixed, or a wave-shaped curve (crimp), each of which has a different wavelength. Using brushes made of many different synthetic resin brushes (see Patent Document 4) and filaments made of synthetic resin with a tapered tip, the brush has a straight cross section and a cross section having a crimp. There has been proposed a brush ear (see Patent Document 5) in which a brush and a brush with a straight cross-section are mixed.

  However, in the case where the animal hair is mixed with the synthetic resin brush whose tip is tapered, it has to have the disadvantages of animal hair, and many synthetic resins have different crimp wavelengths. In the case of the brush made of brush, the space is likely to be large and the coating property is improved, but there are also problems that the waist becomes weak and the unit of the brush head becomes poor. In addition, when using a brush made of synthetic resin with a tapered tip, in the case of a mixture of a brush with a circular straight section and a brush with a crimp-shaped cross section and a brush with a deformed straight section, The space becomes too large and the ink content is good, but there is a problem that the fibers are easily misaligned, the brush ears are easily broken, and the writing performance is deteriorated.

  In order to solve these problems, there has been proposed a brush head (see Patent Document 6) in which two or more kinds of brushes including brushes having irregularities on the brush surface are mixed.

Japanese Patent Publication No.49-6159 (Claims) Japanese Examined Patent Publication No. 60-30556 (column 3, line 24 to column 4, line 15) JP-A 63-102998 (Claims) Japanese Utility Model Publication No. 62-114781 (Scope of Claim for Utility Model Registration) JP 2008-30335 PR (Claims) JP 2008-295706 PR (Claims)

  However, in the case of an application brush in which two or more types of brushes including uneven brushes are mixed on the surface of the filament, the straight filament surface is a solid filament with an uneven cross section, and the filament surface having a crimp is The smooth cross-section mixes with the solid filament, but since only one characteristic can be obtained with one filament, the filament with a solid cross-section with a straight filament surface improves the wetting of the filament surface, The filament surface with the crimp has a smooth cross section and the filament has a larger space ratio, so it has the characteristics of each filament such as improving the containment of the coating solution, but each filament has its own characteristics. Since it cannot be used, it is difficult for the entire application brush to be in a uniform state. If the coating brush is too well-organized and the coating solution is a high-viscosity coating solution or a fast-drying coating solution that dries quickly, it can be applied. The problem that the discharge of a liquid was bad and the problem that an application brush was easy to aggregate were left.

The present invention provides a coating brush in which the tips of a plurality of types of filaments made of synthetic resin are tapered and the filaments are mixed and bundled to form fine irregularities on the surface of at least one type of filaments of the plurality of types of filaments. In addition, the filament is formed by applying a wavy crimp process, and the filament is made of a hydrophobic material or characteristic, and the arithmetic average height of the fine irregularities is in the range of 80 nm to 500 nm. It is characterized by being formed by .

The coating brush according to the present invention is a coating brush in which the tips of a plurality of types of filaments made of synthetic resin are tapered, and the filaments are mixed and bundled. The coating brush is fine on the surface of at least one type of filaments of the plurality of types of filaments. In addition to forming irregularities and forming a wavy crimping process, the filament is made of a hydrophobic material or property, and the arithmetic average height of the fine irregularities is 80 nm. Since it is formed in the range of ˜500 nm, one filament has three characteristics, and the entire coating brush is likely to be in a uniform state, and a uniform coating effect can be obtained in any part. . Specifically, by forming fine irregularities on the filament surface, the surface area with which the coating solution comes into contact is increased, the wettability of the filament is improved, and by applying a wavy crimping process, the ink holding power is increased. Become good. In addition, since the filament is made of a hydrophobic material or a characteristic, the coating liquid is easily separated from the coating brush, so that ink discharge is good. As a result, the ink supply as a whole becomes better, the touch at the time of writing becomes smooth, and the aggregation of the application brush is suppressed, so an application brush that can be written smoothly at any time is obtained regardless of the frequency of use. It is done. Furthermore, since a fine irregularity is formed on one filament and a wavy crimping process is performed, a combination of fine irregularities and large crimp-like irregularities makes it possible to form a crimp-like shape in the coating brush. Since the fine irregularities on the filament surface absorb the excess coating liquid accumulated in the space, the entire coating brush tends to be more uniform.

1 is a schematic side view of an application brush according to the present invention. (A) It is the cross section by which the application brush was inserted and fixed to the front shaft. (B) It is the cross-sectional view by which the thing which inserted and fixed the application brush to the front axis | shaft was inserted and fixed from the front-end part of the axis | shaft. It is an expansion schematic diagram of each filament used for this invention. FIG. 2 is an enlarged schematic view of a filament 2 formed by forming fine irregularities on the surface of the filament and applying a wavy crimping process, and the filament is made of a hydrophobic material or characteristic. It is an expansion schematic diagram of the crimp shape of the filament 2 which concerns on this invention. (a) It is the front view and top view which show the modification of the front-end | tip shape of an application brush. (b) It is the front view and top view which show the modification of the front-end | tip shape of an application brush.

  The present invention will be described below. In FIG. 1, reference numeral 1 is an application brush 1 for a cosmetic liquid, and this application brush 1 is inserted and fixed to a front shaft 5, and this front shaft 5 is inserted and fixed to the front end of a shaft 6 to form a brush. ing. Further, the application brush 1 is formed by forming fine irregularities on the surface of a filament whose tip is tapered, and by applying a wavy crimping process, and the filament has a hydrophobic material or characteristics. Using mixed filament 2 and filament 3 with a straight tapered filament surface having a smooth cross section and a hollow filament 3 having a smooth tapered cross section and a filament 4 having a smooth smooth section and having a smooth cross section. It is formed by focusing in the longitudinal direction and fixing the rear end portion by a method such as heat welding or bonding with an adhesive.

  The filament 2 used in the coating brush 1 is formed by forming fine irregularities on the surface of the filament whose tip is tapered and by applying a wavy crimping process, and the filament has a hydrophobic material or characteristics. In order to form fine irregularities on the filament surface here, it is preferable to use a material in which a mineral (mineral) or the like is kneaded in the filament resin. This is because the mineral kneaded in the filament resin forms irregularities on both the filament surface and inside the filament, so that irregularities can be formed even by melting such as taper processing. Contrary to this, if the surface of the filament is uneven by plasma treatment or laser, the surface unevenness disappears due to dissolution such as taper processing, or depending on the frequency of use, the surface unevenness is lost. Therefore, it is not preferable.

  As the synthetic resin material used for the filament 2, it is preferable to use a material having hydrophobic characteristics such as polyester (polyethylene terephthalate, polybutylene terephthalate, etc.). However, even if the material has hydrophilic properties such as polyamide (6,6-nylon, 6-nylon, 12-nylon, 6,10-nylon, 6,12-nylon, etc.), the filament surface has fluorine. If water-repellent treatment such as resin processing is performed and hydrophobic properties are applied, the same effect can be obtained if fine irregularities are formed on the surface of the filament as well as the filament 2 and wave-shaped crimping is applied. Can be used. However, when water-repellent treatment such as fluororesin is performed, it is more preferable to knead the fluororesin into the filament resin than to coat the filament surface. This is because, when the filament surface is coated, surface irregularities disappear due to melting such as taper processing, or depending on the frequency of use, the surface irregularities fall off.

  In addition, as a material made of synthetic resin used for the filaments 3 and 4, when the filament 2 having a polyester-based hydrophobic property is used, the brushes 3 and 4 are made of a polyamide-based hydrophilic material. It is preferable to use a material having the characteristics of sex. However, even a hydrophilic material such as nylon may be used for the filament 2 as long as it has hydrophobic characteristics.

The material of the filaments 2, 3, and 4 used in the coating brush 1 may be the same or different, but the point is to form fine irregularities on the surface of the filament and to apply a wave-like crimping process. In addition, it is important that at least one type of the filament having a hydrophobic material or characteristic and a filament having a hydrophilic characteristic are combined in combination. This is because the above result cannot be obtained unless these two characteristics are combined.

The filaments 3 and 4 mixed with the filament 2 are straight filament surfaces with a smooth cross-section hollow filament, straight filament surfaces with a smooth cross-section irregular filament, straight filament surfaces with a smooth cross-section innocent However, the present invention is not limited to this. Here, two types of filaments are mixed into the filament 2, but one type, two types, or any number of types may be mixed depending on the size of the application brush 1 to be used or the intended use. However, since the material or characteristic used for the filament 2 is always hydrophobic, at least one type of filament having hydrophilic characteristics must be mixed. Others may be hydrophobic or hydrophilic.

  The diameter D of the bases of the synthetic resin filaments 2, 3 and 4 used in the application brush 1 varies depending on the production application or size (diameter and length), but the cosmetic application brush 1 according to the present invention. The diameter D of the bases of the filaments 2, 3, and 4 is preferably 0.05 mm to 0.16 mm. The filament diameter D mentioned here refers to the diameter of the portion that is not tapered.

  In order to make the filaments 2, 3, 4 made of synthetic resin tapered toward the rear from the tip, a method using a chemical treatment liquid is preferable, and a specific example thereof is polyamide. On the other hand, a mixed liquid of metacresol and calcium chloride-methanol solution, and a combination of sodium hydroxide and the like with respect to polyester can be mentioned. However, it is not necessarily limited to this method, and other methods such as mechanical taper such as grinder polishing may be employed.

  A fine unevenness is formed on the surface of the filament 2 of the coating brush 1 made of a synthetic resin with a tapered tip, and a wavy crimping process is performed, and the filament has a hydrophobic material or characteristics. The purpose of using the filament 2 made of material is to combine three characteristics with one filament, and the entire coating brush is likely to be in a uniform state, and a uniform coating effect can be obtained in any part. Become. Specifically, since fine irregularities are formed on the surface of the filament, the surface area with which the coating solution comes into contact is increased, the wetting of the surface of the filament is improved, and a wavy crimping process is performed, thereby providing ink. The holding power of is improved. In addition, since the filament is made of a hydrophobic material or characteristic, the coating liquid is easily separated from the filament, and ink discharge is improved. As a result, the ink supply as a whole is improved, the touch during writing becomes smooth, and the aggregation of the application brush is suppressed, so that writing can be performed smoothly at any time regardless of the frequency of use. Furthermore, since a fine irregularity is formed on one filament and a wavy crimping process is performed, a combination of fine irregularities and large crimp-like irregularities makes it possible to form a crimp-like shape in the coating brush. Excess coating liquid accumulated in the space is absorbed by fine irregularities on the filament surface, and the entire coating brush tends to become more uniform.

In addition, since the filament 2 has three characteristics with one filament, the entire coating brush is likely to be in a uniform state, and a uniform coating effect can be obtained in any part, and there is little variation and the quality coating brush 1 has a low quality. It is obtained.
By the way, if only one characteristic can be obtained for one filament, for example, a straight filament surface with an irregular cross-section filament and a crimped filament surface with a smooth filament cross-section with solid hair However, since each filament can exhibit only the respective characteristics, the entire coating brush is difficult to be in a uniform state, a uniform coating effect cannot be obtained, and the coating brush is likely to vary.

  Moreover, it is preferable to use what formed the arithmetic mean value height of the fine unevenness | corrugation of the surface of the said filament 2 in the range of 80 nm-500 nm. The reason is that if the arithmetic average height of the fine irregularities on the surface of the filament 2 is less than 80 nm, the irregularities on the surface are too fine, and the wetting of the filament and the inclusion of the coating liquid are not improved. Also, if the arithmetic average height of the fine irregularities on the surface of the filament 2 exceeds 500 nm, the irregularities on the filament surface become too large, and the filaments tend to be misaligned, and the coating brush becomes poorly organized, This is because the touch becomes lumpy and the feeling of use becomes worse.

  The height of the surface irregularities of the filament 2 was measured using an atomic force microscope (AFM). The atomic force microscope uses a sharp, sharp cantilever to trace the sample surface, trace it at a constant distance from the sample surface, and measure the vertical displacement of the cantilever. What measured the height of a shape as an arithmetic mean value was used.

  The crimp waveform shape of the filament 2 is preferably such that the crimp waveform height H is 0.01 mm to 0.5 mm and the waveform pitch P is 1.0 mm to 5.0 mm. The reason is that when the crimp waveform height H is less than 0.01 mm, the crimp hardly forms, and the content of the coating liquid may be reduced. On the other hand, if the crimp waveform height H exceeds 0.5 mm, the space ratio becomes too large and the feeling of use becomes worse, and the coating brush 1 is broken or cracked. Further, if the corrugated pitch P is less than 1.0 mm, although depending on the corrugated height H, the pitch P is too short and the feeling of use becomes worse, and the coating brush 1 becomes unorganized. Further, when the corrugated pitch P exceeds 5.0 mm, the crimp is hardly formed in the coating brush, and the inclusion of the coating liquid is reduced.

  In addition, a fine asperity is formed on the surface of the filament 2, and a wavy crimping process is performed, and the filament is composed of a hydrophobic material or characteristic. Those in the range of ˜60% weight are preferred. The reason is that if the blending ratio of the filament 2 is less than 20%, the space ratio in the coating brush 1 is lowered and the filament surface is poorly coated, and the dischargeability of the coating liquid is lowered. On the other hand, when the blending ratio of the filament 2 exceeds 60%, the space ratio becomes too large, the familiarity of the filaments becomes worse, the unity of the application brush 1 becomes worse, and the touch at the time of use is lowered. is there.

  Moreover, although the cross-sectional shape of this application brush 1 changes with manufacturing uses or a magnitude | size (diameter and length), although the cross-sectional shape of the application brush 1 was created in the circular cone shape this time, it is limited to this. The same effect is exhibited even if it is used for an elliptical or rectangular shape (see FIG. 6A) or an inclined flat shape (see FIG. 6B).

  In manufacturing the cosmetic liquid application brush 1 according to the present invention, the filaments 2, 3, and 4 are mixed, and the rear ends are welded, bonded, or the rear part is tied with a thread to prevent the filament from falling off. The mixed application brush 1 is formed by applying a wavy crimping process to the surface of the filament with the tip tapered and forming the hydrophobic filament. Filament 2 made of a material with specific properties or characteristics, straight filament surface with a tapered tip and a smooth cross section of hollow filament 3 and straight filament surface with a tapered tip and a smooth cross section are innocent. It is preferable that the filaments 4 are uniformly mixed with each other and arranged.

Examples of the present invention will be described below.
FIG. 1 shows a brush as an example of use of the cosmetic liquid application brush 1 of the present invention. Reference numeral 1 is an application brush 1 for a cosmetic liquid, in which filaments 2, 3, and 4 are mixed and their rear ends are welded. The application brush 1 is inserted and fixed to the front shaft 5, and the front shaft 5 is inserted and fixed to the front end of the rear shaft 6 to form a brush.
The filament 2 is formed by forming fine irregularities on the surface of the filament with the tip tapered and applying a wavy crimping process, and the filament is formed of a hydrophobic material or characteristic. 2 and a filament 3 with a smooth straight section with a tapered tip and a hollow section 3 with a smooth cross section and a filament 4 with a straight section with a tapered tip and a smooth section with a smooth cross section are used. Show.

  Tables 2 (Examples 1 to 9), Tables 3 (Examples 10 to 18) for conditions such as surface irregularities of the filaments of the coating brushes of Examples 1 to 18 and Comparative Examples 1 to 15, crimp shape, and resin properties, It shows in Table 4 (Comparative Examples 1-9) and Table 5 (Comparative Examples 10-15).

A cosmetic liquid application brush shown in FIG. 1 was formed using the application brushes of Examples 1 to 18 and Comparative Examples 1 to 15, and a cosmetic liquid application test was performed.
The cosmetic liquid was subjected to a coating test using an eyeliner ink.

Application test (monitor test)
Method: We asked a monitor extracted arbitrarily to actually use a cosmetic liquid application brush and conducted a monitor survey on usability. The results are shown in Table 6.

DESCRIPTION OF SYMBOLS 1 Coating brush 2 Filament which formed the fine unevenness | corrugation on the surface of the filament which taper-processed the front-end | tip, and gave a wavy crimp process, and formed the said filament with what has a hydrophobic characteristic 3 front-end | tip Filament with a smooth straight surface with a tapered cross-section and a hollow filament with a smooth cross section 4 Filament with a straight straight section with a tapered end and a smooth cross-section 5 Front shaft 6 shaft

Claims (5)

In a coating brush in which the tips of a plurality of types of filaments made of synthetic resin are tapered, and the filaments are mixed and bundled, fine irregularities are formed on the surface of at least one type of filaments of the plurality of types of filaments. The filament is made of a material having a hydrophobic material or characteristics, and the arithmetic average height of the fine irregularities is in the range of 80 nm to 500 nm. An application brush characterized by. 2. The coating brush according to claim 1, wherein a crimp corrugated height of the synthetic resin filament is in a range of 0.01 mm to 0.5 mm and a corrugated pitch of 1.0 mm to 5.0 mm. The material of the said filament made from a synthetic resin is a filament made from PBT , The coating brush of Claim 1 or Claim 2 characterized by the above-mentioned . The coating brush according to claim 1 or 2, wherein the synthetic resin filament is made of a nylon filament and water-repellent. To form the surface fine unevenness of the synthetic resin filaments, and formed by subjecting a wavy crimping and,混毛ratio of filaments composed of a sequence of said filaments having a hydrophobic material or characteristics The application brush according to any one of claims 1 to 4, wherein the weight is in a range of 20 to 60% by weight.

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