JP2018118435A - Fiber for brush - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fiber for a brush and a brush using the same which can obtain coating quality peculiar to synthetic fibers in addition to animal hair quality, by taking advantage of the characteristics of synthetic fibers instead of imitating the shape of animal hair, which is a natural product.SOLUTION: There is provided a fiber for a brush, in which a base fiber diameter D is 50 μm or more and 75 μm or less and a fiber diameter Dat the rear position at a distance 50D which is 50 times the length of the base fiber diameter from the tip end of the fiber is 70% or more and 105% or less of the base fiber diameter D.SELECTED DRAWING: Figure 1

Description

  The present invention relates to cosmetics such as cheek brushes, face brushes, eyeliners and lip brushes, writing brushes for brush pens with built-in brushes and ink used in calligraphy, textiles for brushes used for brushes, brushes, etc. is there.

  Conventionally, synthetic fibers are known as fibers used for brush ears in addition to natural fibers made from animal hair such as goats and squirrels. Synthetic fibers can be manufactured at a lower cost than animal hair, and are preferable from the viewpoint of environmental protection and animal protection. It is known that brush ears made of synthetic fibers have various qualities improved in various forms in order to obtain the same coating quality as animal hair.

  For example, in the invention described in Japanese Patent Application Laid-Open No. 2008-154919 (Patent Document 1), in order to obtain an animal hair-like skin texture, brush hair using a filament having an irregular wave shape in the fiber axis direction is used. A material is disclosed.

  Further, the invention described in Japanese Patent Application Laid-Open No. S49-047618 (Patent Document 2) discloses an animal hair that is tapered to the tip of the fiber.

JP 2008-154919 A Japanese Patent Laid-Open No. 49-047618

  The conventional brush ear fiber is derived from an attempt to obtain animal hair coating quality at a low cost when used as a brush ear, and it cannot be denied that the coating quality is inferior to animal hair.

  The invention described in Patent Document 1 is considered to be an attempt to reproduce the randomness of animal hair, but irregular wave shapes are disadvantageous in terms of stable quality, and the randomness of natural objects is reduced. It is practically difficult to reproduce, and there is a problem that a mass-produced product that can stably control the quality cannot be obtained.

  In addition, the invention described in Patent Document 2 is a fiber obtained by applying a taper process to the tip of the fiber to obtain an animal hair-like fiber. It was hard to say that the quality of animal hair was always obtained when used as a brush.

  In addition to the above-mentioned problems due to the fact that animal hair was considered to be of high quality, it is thought to be derived from the fact that it is a natural product, but the tapered shape is gentle, and this shape Even if it is reproduced with synthetic fibers, there is a problem that the touch is too soft or the touch is exciting due to the sharp tip.

  The present invention does not imitate the shape of animal hair, which is a natural product, but takes advantage of the characteristics of synthetic fibers, and in addition to animal hair-like qualities, brush fibers that provide a coating quality peculiar to synthetic fibers can be obtained. The purpose is to provide used brush ears.

  The present invention relates to a fiber for a brush having a reduced diameter part at the tip part, the base fiber diameter is 50 μm or more and 75 μm or less, and the fiber at a position behind the fiber tip by a distance of 50 times the length of the base fiber diameter A brush fiber having a diameter of 70% or more and 105% or less of the base fiber diameter is a first gist, and a fiber for brush whose fiber is a nylon fiber is a second gist, and the fiber has a period of 1500 μm or more and 5500 μm. A brush fiber that is a corrugated fiber having a wave height of 20 μm or more and 200 μm or less is defined as a third gist, and a fiber for a brush whose average surface roughness Ra is 0.15 μm or more and 0.90 μm or less. It is the gist of 4.

  The brush fiber of the present invention uses a fiber having a relatively small base fiber diameter of 50 μm or more and 75 μm or less, and the fiber as a whole tends to be bent. By setting the fiber diameter at the rear position at a distance of 50 times the length to 70% or more and 105% or less of the base fiber diameter, the fiber diameter of the base is maintained up to the portion close to the tip portion, and the local rigidity Demonstrate. The human skin has a hardness of about 5 to 10 (JIS K 6253 durometer A), and can be applied with soft touch and pressing moderately, so it is applied to push the coating solution or powder into the skin texture. It is presumed that it is possible to form a coating mark with good fixability and good skin color and good color development even with a small coating amount.

  Furthermore, in addition to the above-described shape characteristics, by using a relatively soft nylon fiber, the feeling of use is improved while ensuring the fixing property.

  Moreover, by making this fiber into a repetitive corrugated shape called a crimp and having a period of 1500 μm or more and 5500 μm or less and a wave height of 20 μm or more and 200 μm or less, the corrugated shape as a whole is easy to bend. In addition, a moderately fine space created in the brush head by entanglement and displacement of the fibers when used as a brush ear, and surface friction creates an abundant space volume as a total, and the tip opens appropriately between the tips of the fibers The distance is also moderate and a soft touch is obtained, and it is assumed that the discharge of powder and liquid is performed relatively slowly due to the deformation of the fiber when pressed against the skin while containing a large amount of liquid and powder, A solid color application mark can be formed while applying lightly.

  Further, when the surface of the fiber has an average surface roughness Ra of 0.15 μm or more and 0.90 μm or less, the coating of powder or liquid is smooth and thin, and a coating mark having no spots is easily formed.

The expansion schematic diagram of the fiber for brush ears of this invention. The graph which shows the relationship between the longitudinal direction length of a fiber, (x axis), and a diameter (y axis). FIG. 2 is an equivalent view of a squirrel hair. FIG. 2 is a diagram corresponding to goat hair. The expansion schematic diagram which shows the crimp shape of the fiber for brush ears of this invention. The external view of the makeup brush using the fiber for brush ears of this invention.

  The fiber for a brush of the present invention can be used for applying eyeliner, lip color, nail color, lipstick, foundation cosmetics, etc. on the skin as a brush by forming a fiber bundle. Can be used by attaching the brush tip of the fiber to a rod-shaped handle or attaching it to a container containing liquid or powder to form an application part. Examples of the applicator include makeup brushes and brushes such as an eyeliner and a lip brush.

  Examples of the fiber material include nylon, polyester (polyethylene terephthalate, polybutylene terephthalate, polytrimethylene terephthalate, etc.), polyurethane, polyacrylonitrile, acrylonitrile-styrene copolymer, acrylonitrile-butadiene copolymer, and the like. Can also be used. In particular, when nylon fiber is used, since the nylon fiber has an amide group (—NHCO) in the molecule and is hydrophilic, it has moisture absorption and retains moisture. They attract each other, and the brush heads are well-organized, become moderately soft at the time of water absorption, can give a smooth coating feeling, and are excellent in abrasion resistance and flex recovery properties among synthetic fibers, so in repeated use It is preferable because the hair is less likely to break or change in shape and the quality can be maintained over a long period of time. Examples of the nylon fiber include 6,6-nylon, 6-nylon, 12-nylon, 6,10-nylon, 6,12-nylon, and the like.

  In addition, inorganic fillers such as calcium, manganese, zinc, copper, calcium carbonate, kaolinite, clay, and aluminum hydroxide are added to the material resin to obtain these synthetic fibers, and the strength, wear resistance, and chemical resistance are increased. Mechanical properties such as heat resistance, heat resistance, and shape stability, and adjusting the particle size and blending amount of these inorganic powders to the desired surface roughness. it can.

  When bundling fibers into a brush ear, natural animal hair or other synthetic fibers, which are other materials, can also be used by mixing them. The mixing ratio of nylon fibers is preferably 20% or more by volume ratio. If the mixing ratio of the nylon fibers is less than 20%, the effect of the present invention is difficult to obtain, and the moisture retention due to moisture absorption is reduced, so that the fibers are easily separated from each other, which may affect the unit of the brush head. is there.

  A nylon fiber having a base fiber diameter of 50 μm or more and 75 μm or less is used. A relatively soft fiber such as a nylon fiber is used, and the fiber diameter is 50 μm or more and 75 μm or less, whereby the fiber as a whole can be provided with a preferable bending and elasticity.

  The maximum diameter D of the fibers may be one type, two types, or any number of types. For example, by blending thick fibers and thin fibers, it is possible to achieve both a touch with elasticity and waist as a brush tip and a soft touch feeling that is easy to converge and soft.

  As shown in the enlarged schematic diagram of an example of the fiber shown in FIG. 1, the tip of the fiber is so-called tapered so as to have a pointed shape that gradually decreases in diameter toward the tip.

FIG. 2 is a graph showing the relationship between the length in the longitudinal direction of the fiber shown in FIG. 1 (x axis) and the diameter (y axis). In order to make it easy to understand the displacement of the inclination of the diameter-reduced portion toward the tip subjected to the taper processing, the scale of the x axis as the horizontal axis is shown as a scale display of 50 times the y axis as the vertical axis. . That is, the shape, the fiber diameter _{(D 50)} in the rear position of the length 50 times the distance of the base fiber diameter (D) from the tip of the fiber (50D) is less than 105% 70% of the base fiber diameter ( 0.7D ≦ D ₅₀ ≦ 1.05D), which is about 80%. A more preferable range is 75% or more and 99% or less.
This means that an inflection point where the rate of change in diameter greatly changes toward the tip that becomes the narrowest is located on the side relatively close to the tip that is in the range of 50 times the base fiber diameter (D). In addition, there is an inflection point at such a position, and fibers that have an inflection point near the tip of about 50 times the diameter of the base fiber are not found in natural animal hair. It can be said that this is a shape unique to synthetic fibers that can be designed into various shapes. By reducing the diameter to a special shape in this way, the base fiber diameter is maintained up to the vicinity of the tip, and the above-mentioned fiber as a whole is provided with favorable bending and elasticity, while the tip portion has a short unit and is locally It exhibits rigidity and can be fixed by applying the liquid or powder as a coating agent against human skin (hardness of about 5 to 10 (JIS K 6253 durometer A)).

  Further, the fiber diameter portion of 70% or less of the fiber diameter of the base is in a length range from the fiber tip to 50 times the fiber base diameter and / or in a range from 2.0 mm to 5.0 mm from the fiber tip. It is preferable that it is formed as a loose fiber because it is easy to push in cosmetics and the like and a finish excellent in fixing property is obtained.

  It should be noted that it is possible to use a mixture of a plurality of types as the shape of the tapered end portion. Mixing and using various fibers is likely to benefit from randomness resulting from uncertain diversity such as natural animal hair.

  Examples of the method for reducing the diameter of the tip tapered include a method of processing with a treatment liquid. Specifically, a mixed solution of metacresol and calcium chloride-methanol solution can be mentioned. However, it is not necessarily limited to this method. For example, other methods such as a method in which a synthetic resin fiber is stretched in a tapered shape by heat stretching or a mechanical taper such as grinder polishing may be adopted. good.

  In addition, when mixing the fiber made from polyester as a brush ear, sodium hydroxide aqueous solution etc. can also be used in combination.

  For comparison, FIGS. 3 and 4 show graphs similar to FIG. 2 for squirrel hair and goat hair, which are natural animal hairs, respectively.

FIG. 3 shows a schematic diagram of the outline of a typical squirrel hair. Although the distance 50 times the length of the base fiber diameter (D) from the tip of the fiber the fiber diameter (D ₅₀₎ at a position behind (50D) is in contact skin so has become 64% of the base fiber diameter good, The tip portion is not rigid and cannot be applied to human skin so that it is pushed in when a liquid or powder as an application agent is applied. As a result, the fixing power was weak and the makeup was liable to break, and there was no color development and it was difficult to achieve a satisfactory finish.

FIG. 4 shows a schematic diagram of the outline of a general goat hair. Since the fiber diameter at the rear position of the distance 50 times the length of the base fiber diameter (D) from the tip of the fiber _(50D) (D ₅₀₎ is in the about 70% of the base fiber diameter, the rigidity at the tip portion Yes, it can be applied to human skin by pushing the liquid or powder that is an application agent, but because the base fiber diameter (D) is thick, the fiber itself has high rigidity and poor skin contact. In addition, there were few contact points when used as a brush tip, and the finish was uneven.

  As shown in a schematic diagram in FIG. 5, the fiber is formed into a repetitive corrugated shape called a so-called crimp, and has a period (maximum mountain distance T) of 1500 μm to 5500 μm and a wave height (amplitude length H) of 20 μm to 200 μm. When used as a fiber, the entire fiber is easy to bend due to the corrugated shape, and the space volume is abundant as a total within the brush head due to the entanglement and displacement of the fibers and the surface friction. The tip of the fiber opens moderately and the distance between the tips of the fibers is also moderate and a soft touch is obtained, and the powder and liquid are discharged by deformation of the fiber when pressed against the skin while containing a large amount of liquid and powder. It is presumed that an appropriate amount is applied relatively slowly, and it is preferable because a solid color application mark can be formed while applying lightly. More preferably, the period is 2500 μm and the wave height is 65 μm. Examples of such a crimp forming method include a method of forming a crimp by applying pressure on the upper and lower gears in the radial direction of the fiber, and a method of forming a crimp by applying heat to the fiber.

  It is preferable that the surface of the fiber has an average surface roughness Ra of 0.15 μm or more and 0.90 μm or less because the coating of powder or liquid is smooth and thin and free of spots. More preferably, it is Ra 0.40 μm or more and less than 0.70 μm. As means for obtaining such a surface state, minerals or inorganic powders are kneaded into the resin, and unevenness is formed on the surface of the fiber and the inside of the fiber. Means for forming irregularities, means for forming irregularities on the surface by dipping in a chemical treatment solution suitable for the material of the fiber such as alkali or acid, and the like.

  Further, as the shape of such a single synthetic fiber, in addition to a round cross-sectional shape, a shape having an irregular cross-sectional shape as disclosed in JP-A-2008-055742 may be used in combination. .

  For example, when a cross-section with a circular cross-section is used in combination, a positive space is created between the fibers inside the brush even if it is bundled in a close-packed state. It is preferable when a coating solution using a pigment having large particles or a coating solution having a high viscosity is used. Furthermore, since the contact area between the fibers is reduced, it is possible to suppress interference and entanglement, and generation of static electricity due to friction and deterioration of the unity.

  The fibers of the present invention are bundled into a brush, and bonded to a stick-shaped handle with a metal or elastic fastener such as a synthetic resin material to make a brush, paintbrush, makeup brush, etc., or cosmetic or ink inside. The applicator can be formed by being attached to the tip of the applicator to be accommodated. The built-in coating liquid may be impregnated in a fiber converging body called batting, or may be a so-called raw ink type that is stored in a free state in a container serving as an ink tank. Further, the ink tank and the batting can be exchanged, and the coating liquid can be replenished and used without changing the shaft and the brush tip as an exterior. Moreover, it is also possible to use a type in which the tip is immersed in a coating solution in a container. In addition, for the purpose of protecting the brush head or suppressing the drying of the liquid, the cap can be crowned, or the brush head can be accommodated in the shaft by a shaft operation, and can be extended and protruded.

  FIG. 6 shows an example of a makeup brush.

  The shape of the brush head 1 is formed by bundling fibers, but spreads in a fan shape from the rear end portion of the brush tip to the tip of the brush tip, the tip of the brush tip has a parallel portion 1a, and faces both sides toward the side portion. Symmetric curved portions 1b and 1b 'are formed. The rear end portion of the brush tip can be formed by welding in a circular, elliptical, flat shape or the like.

  The bristle brush 1 bundled in this way is fixed to an AS resin handle 3 with an adhesive mainly composed of an epoxy resin by an aluminum fastener 2.

  Moreover, although the ink and cosmetics to be used are not specifically limited, Dye and / or a pigment can be used as a coloring agent. It is also possible to scoop and apply powdered colored particles or cake color or foundation powder obtained by pressing and solidifying them with a brush.

  Various raw fibers are used as raw material fibers obtained by extruding a fiber raw material composition in which inorganic powders such as minerals are appropriately mixed into the raw material synthetic resin (referred to as mineral blending etc.), and gears with appropriate gear dimensions are pressed. By applying this, fibers for brush ears having various periods and wave heights were obtained. For the obtained fiber, the tip of the fiber is immersed in a mixed solution of metacresol and calcium chloride-methanol solution when the raw material synthetic resin is nylon, or in a sodium hydroxide aqueous solution in the case of polyester. A tip taper portion having a taper angle was formed.

The following were used as the raw fiber.
(Fiber 1) 6.12 Nylon Filaments TYNEX (R) 0900 (nylon fiber, manufactured by DuPont)
(Fiber 2) 6.12 Nylon Filaments TYNEX (R) 0901 (mineral-mixed nylon fiber, manufactured by DuPont)
(Fiber 3) 6.12 Nylon Filaments TYNEX (R) 0993 (Atypical nylon fiber (transverse rhombus, internal four-hole hollow shape), manufactured by DuPont)
(Fiber 4) 6.10 Nylon Filaments (nylon fiber, manufactured by DuPont)
(Fiber 5) 6.12 Nylon Filaments Medex S (nylon fiber, manufactured by PERLON Co., Ltd.)
(Fiber 6) 6.10 Nylon Filaments (nylon fiber, manufactured by PERLON)
(Fiber 7) 6.12 Nylon Filaments (nylon fiber, manufactured by PERLON Co., Ltd.)
(Fiber 8) 6 Nylon Filaments (nylon fiber, manufactured by Toray Monofilament Co., Ltd.)
(Fiber 9) 6.6 Nylon Filaments (nylon fiber, manufactured by Toray Monofilament Co., Ltd.)
(Fiber 10) 6.10 Nylon Filaments (nylon fiber, manufactured by Toray Monofilament Co., Ltd.)
(Fiber 11) 6.12 Nylon Filaments (nylon fiber, manufactured by Toray Monofilament Co., Ltd.)
(Fiber 12) Polyester PBT (PBT fiber, manufactured by DuPont)
Each fiber having a tapered portion at the tip is placed in a brush head forming body with the tip portion facing downward, and formed into a mountain swing shape (R) R15 while applying vibration, and the head length (L ) A cosmetic brush for powder cosmetics having a length of 45 mm, a base long side width (W1) of 24 mm, and a base width (W2) of 14 mm was obtained.

  In addition, the average surface roughness (Ra) of the said brush fiber was measured with the laser microscope (VK-X250, Keyence Corporation make) the surface of the brush fiber, and the uneven | corrugated state of the surface was confirmed.

  The pointed shape of the brush fibers having a reduced diameter is measured by measuring 0.5 mm outside diameter in the longitudinal direction of the fiber with a tool microscope (MM6C-PSZ Olympus), and from the average value of each fiber n = 30. The shape was confirmed.

Examples 1-33, base fiber diameter (D) of the fibers for brushes of Comparative Examples 1-11, fiber diameter (D ₅₀ ) at a position behind the distance 50 times the length of the base fiber diameter, crimp cycle (maximum Table 1 shows various conditions of the mountain distance T), the crimp wave height (amplitude length H), and the average surface roughness (Ra).

塗布用化粧料
ファンデーション用のピュアミネラルパウダーオークル３〈ファンデーション、メイベリンニューヨーク製、米国）を使用して塗布試験を実施した。
試験
上記のパウダー化粧料を用い、上記塗布用化粧料を使用してモニター試験を実施した。結果を表２に示す。

Cosmetics for Application An application test was performed using Pure Mineral Powder Ocher 3 for Foundation (Foundation, Maybelline New York, USA).
Test Using the powder cosmetics described above, a monitor test was conducted using the coating cosmetics. The results are shown in Table 2.

The confirmation items are as follows.
Including powder: By visually observing how the powder adheres to the brush head, it is judged that “good” means that the entire brush head is evenly clean, and “poor” means that the brush head is mottled or powder-free Based on the criteria, the sensory evaluation was performed in the following four-step evaluation.
◎: The powder on the brush head is very beautiful ○: The powder on the brush head is beautiful △: The powder on the brush head is slightly spotted and bad ×: The powder on the brush head is locally attached, or Feeling of touching the skin without powder: “Good” means that the skin touch is smooth and comfortable when applying cosmetics to the skin with brush ears. Was determined as a four-level evaluation by sensory evaluation as described below.
◎: Very good touch (smooth and comfortable)
○: Good touch feeling △: Bad touch feeling ×: Very bad touch feeling (scratching)
Fixing ability: When the cosmetics are applied to the skin with brush ears, the fixability of the powder is visually determined to be “good” if the cosmetics are firmly fixed on the skin. Based on the criteria for determining a product as “bad”, the sensory evaluation was performed as described below in a four-step evaluation.
◎: Fixability is very good and makeup is not broken ○: Fixability is good and makeup is difficult to break △: Fixability is poor and makeup is easy to collapse ×: Color is very poor and fixability is lost By visually observing the presence or absence of gloss (color development) when applying cosmetics to the skin, the skin is glossy (color development) and the skin is glossy (color development). On the basis of the judgment that the powder does not get on, “bad”, the sensory evaluation was performed in the following four grades.
◎: Clear gloss on the skin ○: Easy to gloss on the skin △: Difficult to gloss on the skin, slightly matte tone ×: No gloss on the skin, Matte uniformity: Cosmetics on the skin with brush ears Visually check the presence or absence of unevenness when smeared with a “good” if it is finished cleanly without any unevenness, and the “bad” judgment criteria for unevenness, as shown below, with a sensory evaluation based on four levels Judged by.
◎: Uneven and very beautiful finish ○: Uneven and beautiful finish △: Slightly uneven and poor finish ×: Unevenness and very poor finish When the coating material is applied once, the elongation of the powder is visually evaluated. If the cosmetics are stretched cleanly, “good” is given. Judged by evaluation.
◎: Powder is well stretched and powder is very good ○: Powder is well stretched △: Powder is difficult to stretch ×: Powder is not stretched and powder is very poor

上記、表２の結果から明らかなように、本発明範囲の実施例１〜実施例１７の筆穂用繊維を使用した化粧筆は、比較例１〜比較例８の筆穂用繊維に比べて、定着性が良く、且つ、少ない塗布量であっても肌残りが良く発色性のよい塗布跡が形成できている。

As is apparent from the results in Table 2 above, the makeup brushes using the earbrush fibers of Examples 1 to 17 within the scope of the present invention are compared to the brush fibers of Comparative Examples 1 to 8. In addition, a coating mark having good fixability and a good skin remaining even with a small coating amount can be formed.

In a brush fiber having a reduced diameter portion at the tip, the base fiber diameter is 50 μm or more and 75 μm or less, and the fiber diameter at the position 50 times the length of the base fiber diameter from the tip of the fiber is the base fiber diameter. The fiber diameter of the base part is maintained up to the part close to the tip part because it is 70% or more and 105% or less, and it exhibits local rigidity, moderately soft touch and push-in Therefore, when a brush is used, the coating liquid or powder can be applied to the skin texture.
Further, in Examples 3 to 17, it is presumed that the usability is good while securing the fixing property because the material of the fiber is a relatively soft nylon fiber.

  Further, in Examples 4 to 14, a solid color application mark can be formed while applying lightly. This is because the examples 4 to 14 have a large amount of cosmetics due to the abundant spaces formed by the repetitive corrugated shape called “crimp” in the fiber having a cycle of 1500 μm to 5500 μm and a wave height of 20 μm to 200 μm. Although it is included, it is inferred that the powder was discharged relatively slowly due to the deformation of the fibers when pressed against the skin.

  Further, in Examples 6 to 12, the coating marks were smooth and thin, and the coating marks without spots were obtained, but the average surface roughness Ra of these fiber surfaces was 0.15 μm or more and 0.90 μm or less. This is presumably because the powder can be applied while being appropriately held.

D Base fiber diameter D ₅₀ Fiber diameter at the rear position 50 times the distance of the base fiber diameter T Crimp period (maximum mountain distance)
H Crimp wave height (amplitude length)
1 brush ear 2 fastener 3 pattern

Claims (4)

In a brush fiber having a reduced diameter part at the tip part, the base fiber diameter is 50 μm or more and 75 μm or less, and the fiber diameter at a position behind the fiber tip by 50 times the length of the base fiber diameter is the base fiber. A brush fiber having a diameter of 70% or more and 105% or less. The brush fiber according to claim 1, wherein the fiber is a nylon fiber. The brush fiber according to claim 1 or 2, wherein the fiber is a wave-shaped fiber having a cycle of 1500 µm to 5500 µm and a wave height of 20 µm to 200 µm. The fiber for brushes according to any one of claims 1 to 3, wherein the average surface roughness Ra of the fiber is 0.15 µm or more and 0.90 µm or less.

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