JP6217899B2 - Cosmetics and cosmetic fibers - Google Patents

Description

  The present invention relates to a cosmetic containing hollow fibers and a hollow fiber used for cosmetics, and more specifically, suitable for cosmetics for eyelashes such as mascara in which hollow fibers having a defect portion are formed in the peripheral wall of the hollow part. The present invention relates to a cosmetic and a hollow fiber used for the production thereof.

  Conventionally, in makeup cosmetics such as foundations, it is known to blend fibers in order to enhance the makeup effect or to give a smooth feeling of use. In addition, in eyelash cosmetics such as mascara, it is known that natural fibers or synthetic fibers are blended for the purpose of making the eyelashes appear long (long lash effect). However, since a sufficient effect cannot be obtained simply by blending fibers, studies on the shape of the blended fibers have been conducted earnestly. For example, in makeup cosmetics by making the fibers have an irregular cross-sectional shape. A method of improving the beauty of the finish and improving the long lash effect in eyelash cosmetics has been proposed (see Patent Document 1).

  Moreover, the cosmetics for eyelashes which mix | blended the hollow fiber instead of the dense fiber are also proposed, for example, patent document 2 has an irregular cross section of length 0.5-2.0 mm and thickness 20-50 micrometers. A cosmetic for eyelashes containing hollow fibers is described (see claim 2). According to Patent Document 2, it is described that the long lash effect and the curl effect are further improved by making the shape of the fiber an irregular cross section and hollow. Patent Document 3 describes a mascara cosmetic containing a hollow fiber having a length of 0.1 mm to 5.0 mm and a single fiber fineness of 0.1 to 30 dtex (see claim 4). It is described that the shape of the hollow cross-section fiber is round, flat, polygonal, multilobal, etc., among which multilobal is preferable (see paragraph 0025). Patent Document 3 also describes that the length of the eyelashes can be made longer, a volume appearance can be given, and the appearance can be made into a clean eye. However, even in mascara cosmetics blended with hollow fibers having a modified cross-section as proposed in Patent Documents 2 and 3, the adhesion between eyelashes and fibers is not always sufficient, and the direction of each fiber is Further improvement has been demanded in terms of the separation effect of keeping the eyelashes separated from each other, the separation effect without sticking the eyelashes, and the curling effect of curling the eyelashes upward.

  On the other hand, in Patent Document 4, the single yarn fineness is 1.0 to 7.0 dtex, and the length of the fiber has a shape in which two circular shapes each having an opening as a cross section are connected at at least one point. Make-up cosmetics containing irregularly shaped fibers of 20 to 1,000 μm, preferably 100 to 500 μm are described (see claim 1 and paragraph 0037), the fibers having a curved shape and a bulky structure It is described that it has excellent light diffusing action and reflecting action and also has an excellent volume-up effect. Further, in Patent Document 4, it is not preferable that the single yarn fineness exceeds 7 dtex because it gives a feeling of foreign matter when applied to the bare skin. If the length is longer than 1,000 μm, the feeling of foreign matter is not felt at the time of application. It is described that it is easy to feel and inferior to the beauty of the finish. Furthermore, Patent Document 4 describes a makeup cosmetic using hollow fibers having a cross-sectional shape of C-shaped length of 400 μm or 1,000 μm and a fineness of 2.5 dtex as a comparative example. And when blending such a hollow fiber having a C-shaped cross section, that is, a hollow fiber in which a part of the peripheral wall of the hollow portion is missing in the longitudinal direction, in terms of light reflection diffusion effect and volume feeling It is described that a sufficient effect cannot be achieved (see Comparative Example 9 and Comparative Example 13).

JP 2004-107237 A JP 2006-273864 A JP 2008-044860 A JP 2009-221645 A

  The present invention has been completed under such background technology, and its purpose is to align the fibers so that the fibers are aligned along the eyelashes when applied to the eyelashes, and to adhere firmly to the eyelashes. An object of the present invention is to provide a cosmetic that is excellent in a long lash effect that makes the eyelash appear longer and a natural appearance without causing fibers to fall, and that can also impart a curling effect and a separation effect. Another object of the present invention is to provide a novel fiber suitable for producing such a cosmetic.

  As a result of intensive studies in view of the above-mentioned problems, the present inventors have found that the cross-sectional shape exemplified as an unfavorable fiber in Patent Document 4 is deficient in the longitudinal direction of the peripheral wall of the hollow fiber, such as C type. Even if it is a fiber provided with a part, when a fiber having a specific fiber length and a specific fineness is used, it has been found that a makeup cosmetic excellent in curling effect, long lash effect and separate effect can be obtained. It came to be completed.

Thus, according to the present invention, the following inventions are provided.
(1) The length is 0.5 to 6 mm, the diameter of the circumscribed circle in the cross section is 20 to 120 μm, the hollowness is 5 to 50%, and the defect rate of the peripheral wall in the cross section is 0.5. A cosmetic comprising hollow fibers in which a part of the peripheral wall of the hollow part is missing in the longitudinal direction, which is -30% and the fineness is 6 to 30 dtex.
(2) The cosmetic according to (1), wherein the cosmetic is eyelash cosmetic.
(3) The cosmetic according to (1) or (2), wherein the shape of the cross section is a substantially triangular shape and has a defect on one side.
(4) The cosmetic according to any one of (1) to (3), wherein the hollow fiber has a length of 1 to 5 mm and a fineness of 8 to 25 dtex.
(5) The cosmetic according to any one of (1) to (4), wherein the hollow fiber has a curvature radius of 0.2 to 15 mm in the length direction.
(6) The length is 0.5 to 6 mm, the diameter of the circumscribed circle in the cross section is 20 to 120 μm, the hollowness is 5 to 50%, and the defect rate of the peripheral wall in the cross section is 0.5. A hollow fiber for cosmetics having a part of the peripheral wall of the hollow part missing in the longitudinal direction, having a fineness of -30% and a fineness of 6-30 dtex.

  According to the present invention, it is possible to provide a cosmetic for eyelashes that adheres firmly to the eyelashes, has an excellent effect of making the eyelashes look longer and has a natural appearance without dropping, and has an excellent curl effect and separation effect. it can. Moreover, the novel short fiber useful for preparation of this cosmetic for eyelashes can be provided.

FIG. 1 is a scanning electron micrograph showing the cross-sectional shape of a hollow fiber having a defect in the peripheral wall of the hollow part used in the examples (magnification 500 times). FIG. 2 is an illustration of a cross-section of a hollow fiber having a defect in the surrounding wall, where (1) is approximately oval, (2) is approximately triangular, (3) is approximately square, and (4) is approximately circular. It is a schematic diagram which shows a cross section. FIG. 3 is an explanatory view showing a method for calculating the hollow ratio and the defect ratio of the hollow fiber.

  The hollow fiber used in the present invention is a fiber in which a part of the peripheral wall of the hollow part is missing and the hollow part and the missing part are continuously formed in the longitudinal direction of the fiber. The cross-sectional shape of the fiber is not particularly limited as long as it has a blank inside and has a defect in a part of the surrounding wall. As a specific example, for example, a triangle ((2 in FIG. 2) )), Quadrangle (see (3) in FIG. 2), polygon such as pentagon, hexagon, octagon, etc., circular (see (4) in FIG. 2), saddle circle (or horseshoe) ((1 in FIG. 2) For example). These shapes may be appropriately modified, for example, a trilobal shape in which each side of the triangle is recessed, a shape in which only one side of the triangle is recessed and the other two sides are linear or slightly bulging, a hexagon It may be a six-leaf shape in which each side is recessed. Among these, a shape having a defect portion on one side of a substantially triangular shape, for example, a shape having a defect portion in the center of a substantially heart-shaped side having a depression as shown in (2) of FIG. 1 and FIG. From the viewpoint of adhesion to eyelashes and curl effect.

  In particular, as shown in FIG. 3, when the length of the side where the defect is present is W and the height from the side to the apex formed by the other two sides is H (both are based on the outside of the fiber cross section). The ratio of H to W (H: W) in the substantially triangular shape is 0.2: 1 to 1.2: 1, and further 0.4: 1 to 1: 1. Preferably, by making such a numerical range, the adhesion of the hollow fiber to the eyelashes becomes good. In addition, it is preferable that two sides other than the bottom side of the substantially triangular shape have a slightly bulging shape on the outside, that is, a convex curve. The hollow part is usually formed by one hole.

In the present invention, the hollow fiber has a defect in the peripheral wall, thereby improving the adhesion between the fiber and the eyelashes. As a result, the long lash effect is increased, a natural appearance is obtained, and the curl effect and The separation effect is increased, but the mechanism of action is considered as follows.
(1) Since it has a hollow structure with a deficient portion on the peripheral wall, the eyelash cosmetic liquid easily enters the inside.
(2) Since there is a defect in the surrounding wall, the fibers tend to adhere to the eyelashes along the defect.
(3) The solvent of the eyelash cosmetic liquid contained in the hollow part volatilizes through the defect part, and the film-forming component is solidified between the defect part and the eyelash to firmly bond the fiber and the eyelash.
(4) Since it has a hollow structure, after the solvent is volatilized, the fiber is lighter than the solid structure, and the curling effect is easily maintained.
(5) Since it has a hollow structure with a deficient portion on the peripheral wall, it tends to be slightly curved fiber even by ordinary spinning, and when such a fiber is used, the effect of curling eyelashes is particularly high.
(6) Unlike the eyelashes, the fibers that do not swell in water or a solvent adhere firmly to the eyelashes, so that the rigidity of the eyelashes increases and the eyelashes are less likely to adhere to each other, and the separation effect is enhanced.

  The material of the hollow fiber of the present invention is not particularly limited as long as it is a synthetic fiber that can be spun. Specifically, polyamides such as nylon-6, nylon-6,6, polyesters such as polyethylene terephthalate, polyolefins such as polypropylene, rayon, cupra, acetate, triacetate, acrylic, polyurethane, vinylon, promix, polynosic, etc. Fiber. Among these, preferred fiber materials are polyamide, polyester, and polyolefin, and polyamide is particularly preferably used. The hollow fiber used in the present invention is produced by spinning a synthetic fiber according to a conventional method except that a spinneret designed to be a hollow fiber having a desired cross-sectional shape is used.

  The length of the hollow fiber of the present invention is 0.5 to 6 mm, preferably 1 to 5 mm, and more preferably 1.5 to 4 mm. If it is less than 0.5 mm, the effect of making the eyelashes look long cannot be exhibited. If it exceeds 6 mm, it is difficult to produce natural eyelashes, and it is difficult to finish beautifully. The hollow fiber has a circumscribed circle diameter of 20 to 120 [mu] m, preferably 40 to 100 [mu] m, more preferably 50 to 90 [mu] m. If it is less than 20 μm, it cannot follow the eyelashes, resulting in an unnatural finish, and if it exceeds 120 μm, the adhesion to the eyelashes is poor and it tends to fall off. Note that, depending on the shape of the cross section, it may not be possible to draw a circumscribed circle in contact with all the apex parts, but in that case, a circumscribed circle with which the most apex parts are in contact is drawn. Furthermore, the fineness is usually 6 to 30 dtex, preferably 8 to 25 dtex, more preferably 10 to 20 dtex, and if the fineness is excessively small, it cannot follow the eyelashes, resulting in an unnatural finish, On the other hand, when it becomes excessively large, the adhesion to the eyelashes is poor, and it tends to fall off.

Moreover, the hollow fiber of this invention is a thing with a hollow rate of 5-50%, and the defect | deletion rate of the surrounding wall in a cross section is 0.5-30%. The hollow ratio and the defect ratio are numerical values calculated as follows.
Hollow ratio (%) = A / B × 100
A: Cross-sectional area of hollow part and defect part B: Total cross-sectional area in fiber outer periphery Defect rate (%) = C / D × 100
C: Linear distance of the defect in the fiber cross section D: Perimeter of the fiber cross section outside

  The values of A and B are calculated in a shape in which both ends a and b of the defect portion are connected by a straight line, as shown in FIG. 3, and the cross section of the hollow fiber is enlarged by an electron microscope. taking measurement. Further, C is the shortest distance connecting both ends of the missing portion in the cross section, and is calculated as the length L as shown in FIG. Further, D is the length of the outer periphery of the peripheral wall in a shape in which both ends of the defect portion are connected at the shortest distance.

  If the hollow ratio of the hollow fiber is less than 5%, the adhesion is poor, and if it exceeds 50%, it becomes difficult to adhere along the eyelashes, resulting in an unnatural finish. The preferable range of the hollow ratio is 10 to 40%, more preferably 15 to 35%. Moreover, if the defect rate is out of the range of 0.5 to 30%, the adhesion to the eyelashes is lowered. A preferable range of the defect rate is 0.7 to 20%, more preferably 1 to 10%.

  The blending amount of the hollow fiber of the present invention can be appropriately selected according to the cosmetic type, but in the case of the eyelash cosmetic, it is preferably 0.1 to 10% by mass relative to the total amount of the cosmetic. Preferably it is 0.5-8 mass%. If the blending amount of the fiber is too small, the effect of making the eyelashes look long is difficult to be exhibited. Conversely, if the amount is excessively large, it is difficult to produce natural eyelashes and it is difficult to finish beautifully.

  The hollow fiber used in the present invention may be linear, but may be shaped slightly curved in the length direction. The curvature radius of the curvature is preferably 0.2 to 15 mm, more preferably 0.5 to 10 mm. If the radius of curvature is excessively large, i.e., close to a straight line, the curl effect will not be improved sufficiently by curving, and if it becomes too small, it will not adhere to the eyelashes and a clean finish will be obtained. It becomes difficult.

  The hollow fiber of the present invention may be colorless or colored in any color. The coloring method may be in accordance with a conventional method. For example, a method by dyeing or a method in which a dye or pigment is kneaded into a fiber forming material can be employed. Further, it may be used after being subjected to a surface treatment with a conventionally known treating agent such as a fluorine compound, a silicone compound, silicic anhydride, or a surfactant.

  In the cosmetic of the present invention, a film-forming resin usually used for cosmetics can be blended. Examples of the film-forming resin include a water-soluble polymer, a polymer emulsion that is an aqueous dispersion of a water-insoluble polymer, and an oil-soluble resin. Examples of the water-soluble polymer include polyvinyl alcohol and polyvinyl pyrrolidone.

  Specific examples of the polymer emulsion include an alkyl acrylate copolymer emulsion, an alkyl methacrylate copolymer emulsion, a styrene / alkyl acrylate copolymer emulsion, a styrene / alkyl methacrylate copolymer emulsion, a vinyl acetate polymer emulsion, Vinylpyrrolidone / styrene copolymer emulsion, alkyl acrylate / vinyl acetate copolymer emulsion, alkyl methacrylate / vinyl acetate copolymer emulsion, acrylic acid / alkyl acrylate copolymer emulsion, acrylic acid / alkyl methacrylate copolymer Combined emulsion, methacrylic acid / alkyl acrylate copolymer emulsion, methacrylic acid / alkyl methacrylate copolymer emulsion, alkyl acrylate dimethicone copolymer emulsion Emissions, and the like.

  As a specific example of the above-mentioned alkyl acrylate copolymer emulsion, there can be mentioned what is named ACLYLATES COPOLYMER (acrylate copolymer) in INCI (International Nomenclature Cosmetic labeling names). Examples thereof include iodosol GH800F (manufactured by Akzo Nobel). In addition, specific examples of the acrylic acid / alkyl acrylate copolymer emulsion include polymers having a name of ACLYLATES / ETHYLHXYL ACRYLATE COPOLYMER ((acrylates / ethyl hexyl acrylate) copolymer), and examples of commercially available products thereof. Examples thereof include Daitozol 5000SJ (manufactured by Daito Kasei Kogyo Co., Ltd.).

  Examples of oil-soluble resins include trimethylsiloxysilicic acid, partially cross-linked organopolysiloxane, trimethylsiloxysilylpropylcarbamic acid, silicone resins such as fluorine-modified silicone, acrylic-modified silicone, and silicone dendrimer-modified resin compound, pentaerythrosyl phosphate And rosin acid-based resins such as candelilla resin, polyvinyl acetate-based resin, polyvinyl isobutyl ether, and polyisobutylene. The candelilla resin is a resin component obtained by fractional extraction of candelilla wax with an organic solvent, and the resin content is preferably 65% by mass or more, more preferably 85% by mass or more, Examples of commercially available products include Candelilla resin E-1 (manufactured by Nippon Natural Products). Examples of the silicone dendrimer-modified resin compound include a copolymer in which an acrylic resin chain is copolymerized with trimethyl silicon dendrimer (acrylates / polytrimethylsiloxy methacrylate). Examples of commercially available products include FA4002 ID Silicone Acrylate (40 (Mass% isododecane solution) (manufactured by Dow Corning Toray).

  These resins may be used alone or in combination of two or more. In the case of eyelash cosmetics, it is possible to blend a copolymer emulsion (acrylates / 2-ethylhexyl acrylate) copolymer or acrylates copolymer, and oil-soluble resins such as candelilla resin, trimethylsiloxysilicic acid or (acrylates / methacrylic acid). It is particularly preferable to blend a polytrimethylsiloxy) copolymer in order to obtain the desired effect by bringing the hollow fibers of the present invention into close contact with the eyelashes.

  Although the compounding quantity of film forming resin (solid content) to cosmetics is adjusted suitably, Preferably it is 1-40 mass%, More preferably, it is 2-35 mass%. When the blending amount is excessively small, it is difficult to obtain the curl maintenance effect, and secondary adhesion between the fibers tends to occur. Also, from the viewpoint of fiber adhesion, the fibers may fall off from the eyelashes. On the other hand, when the amount is excessively large, it becomes difficult to apply.

  The cosmetic of the present invention usually contains a wax. The wax means a solid oil component at normal temperature. Specifically, beeswax, carnauba wax, candelilla wax, cotton wax, bayberry wax, ibota wax, whale wax, montan wax, nuka wax, lanolin, kapok wax, molasses, lanolin acetate, liquid lanolin, sugarcane wax, lanolin fatty acid isopropyl, hexyl laurate, Reduced lanolin, jojoba wax, hard lanolin, shellac wax, microcrystalline wax, paraffin wax, polyoxyethylene lanolin alcohol ether, polyoxyethylene lanolin alcohol acetate, polyoxyethylene cholesterol ether, lanolin fatty acid polyethylene glycol, fatty acid glyceride, hydrogenated castor oil, petroleum jelly , Polyoxyethylene hydrogenated lanolin alcohol ether, alkyl silicone, jojoba ester, etc. It is. These waxes may be used alone or in admixture of two or more. Among these, carnauba wax is particularly preferable.

  Although the compounding quantity of the wax to the cosmetics of this invention is adjusted suitably, Preferably it is 1-40 mass%, More preferably, it is 5-30 mass%. If the blending amount is excessively small, the effect of the present invention may not always be sufficient. On the other hand, when the blending amount is excessively large, stickiness is produced and the viscosity becomes high, it is difficult to apply, and it is difficult to finish beautifully.

  A coloring material can be blended in the cosmetic of the present invention. The coloring material is not particularly limited by the shape, particle diameter, and particle structure as long as it is generally used in the cosmetic field. Specific examples of the shape include, for example, a spherical shape, a plate shape, a needle shape, and the like, and specific examples of the particle diameter include, for example, fumes, fine particles, pigment grades, etc. It may be porous or non-porous.

  Specific examples of the color material include inorganic powders, glitter powders, organic powders, pigment powders, metal powders, composite powders, and the like. More specifically, talc, mica, kaolin, calcium carbonate, silica, zinc white, titanium dioxide, red iron oxide, yellow iron oxide, black iron oxide, ultramarine, bitumen, carbon black, low-order titanium oxide, cobalt violet, Inorganic pigments such as chromium oxide, chromium hydroxide, cobalt titanate, bismuth oxychloride, titanium-mica pearl pigments; polyamide resins, polyethylene resins, polyacrylic resins, polyester resins, fluorine resins, cellulose resins , Polystyrene resin, copolymer resin such as styrene-acrylic copolymer resin, organic polymer resin powder such as polypropylene resin, silicone resin, urethane resin; red 201, red 202, red 204, red 205, Red 220, Red 226, Red 228, Red 405, Orange 20 No., Yellow No. 205, Yellow No. 4, Yellow No. 5, Blue No. 1, Blue No. 404, Green No. 3, etc. Organic pigments such as zirconium, barium or aluminum lakes; Natural pigments such as chlorophyll and β-carotene; Dyes etc. Is mentioned. These color materials may be used alone or in combination of two or more. Among these, it is preferable to use a black color material, particularly black iron oxide and carbon black.

  The blending amount of the color material can be appropriately selected. Preferably it is 0.1-20 mass%, More preferably, it is 0.5-15 mass%. If the blending amount of the color material is excessively large, the adhesion is liable to decrease, and conversely if it is excessively small, the effect of the color material may be insufficient.

  The cosmetic of the present invention can be blended with a thickener in order to adjust to an appropriate viscosity. Examples of the thickener include dextrin fatty acid ester, bentonite, xanthan gum, cellulose gum, and sodium polyacrylate. One or more of these thickeners are selected and used. Among these, sodium polyacrylate has a spinnability and contributes to the improvement of the long lash effect. The blending amount of the thickener can be appropriately selected according to the desired viscosity. Preferably it is 0.1-20 mass%, More preferably, it is 1-15 mass%. If the amount is too small, it may be difficult to adjust to a sufficient viscosity. On the other hand, when the blending amount is excessively large, the viscosity becomes too high and the smoothness may be lacking.

  In this invention, cosmetics can be manufactured by a conventional method by blending the above components. The cosmetic dosage form may be any of an oil-in-water type, a water-in-oil type, and an oily type. Moreover, you may add the other component which can be normally mix | blended with cosmetics within the range which does not impair the effect of this invention. Examples of such components include alcohols, polyhydric alcohols, drugs, surfactants, water-soluble polymers, clay minerals, powders, preservatives, fragrances, antioxidants, ultraviolet absorbers, humectants, fats and oils And oily components such as hydrocarbon oils.

  The case where the cosmetic of the present invention is prepared as a cosmetic for eyelashes has been described above, but the cosmetic of the present invention can also be prepared as a makeup cosmetic such as a foundation and a skin care cosmetic such as a gorge cosmetic. . In this case, components that can be usually blended in cosmetics may be added, and the dosage form may be any of an oil-in-water type, a water-in-oil type, an oily type, an aqueous type, and a powder type.

  When the cosmetic of the present invention is prepared as a makeup cosmetic, it can be used as a foundation, makeup base, blusher, eye shadow, eyebrow, eyeliner and the like. Among them, when used as a foundation or makeup base, a beautiful finish can be obtained by orienting the fibers in irregularities such as skin grooves and wrinkles. When used as skin care cosmetics such as gorgeous cosmetics, the hollow fibers have a structure with defects on the surrounding walls, so they tend to be gathered together like an eraser wrinkle due to the entanglement of the fibers, and the effect of removing dirt and old keratin Gommage cosmetics with excellent usability can be obtained.

  Next, the present invention will be described more specifically with reference to examples. The present invention is not limited by these examples. Unless otherwise specified, the blending amount in the prescription is mass% with respect to the total amount.

Production Example 1 (Spinning of hollow fiber having a defect in the surrounding wall)
Using a spinneret having a cross-sectional shape as shown in FIG. 1, nylon-6 was spun by a conventional method, and after drawing, a length of 1 mm, 1.5 mm, 2 mm, using a guillotine cutter, Cut into 3 mm and 4 mm to obtain hollow short fibers having a defect in the surrounding wall. The cross-sectional shape of this short fiber can be said to have a defect at the center of one side of a substantially triangular shape, and it can also be said to have a defect at the center of a side having a substantially heart-shaped depression. The diameter of the circumscribed circle is about 70 μm, the hollowness is about 25%, the defect rate is about 3%, the fineness is 15 dtex, and the length (W) of the side having the defect part calculated according to the measurement method shown in FIG. The ratio of the height (H) from the side to the apex formed by the other two sides (H / W) was 0.75 / 1. All the short fibers were slightly curved in the length direction, and the average radius of curvature of the short fibers having a length of 2 mm was 7 mm. The performance of the short fibers thus obtained as cosmetic fibers was evaluated in the following examples.

  For comparison, short fibers A to C shown in Table 1 were used.

The cosmetic evaluation methods in Examples 1 to 6 and Comparative Examples 1 to 3 below are as follows.
(1) Curl effect (1-1) Curl effect (1)
The eyelashes were attached to a plastic cylinder having a bottom surface of about 3 cm in diameter along the circumference, and a mascara having a formulation shown in Table 2 was applied. Photographs were taken before and after the application, and changes in the angle at which the eyelashes curled by applying the mascara (curl angle) were observed. The curl angle was calculated as the angle difference between before and after application by measuring on the photograph the internal angle between the line connecting the root and the tip of the eyelash and the vertical line from the base of the eyelash. The mascara was applied five times using the same mascara brush, then dried for 15 seconds, and further applied five times. The curl angle is an average value of 10 coating tests.

(1-2) Curl effect (2)
The eyelash cosmetic (mascara) was applied to the eyelashes of 20 specialist panels, and the eyelashes were visually observed to see if the eyelashes were curled upward, and evaluated according to the following criteria.
◎: Among 20 people, 12 or more responded that there was a curling effect. ○: Among 20 people, 7 to 12 answered that there was a curling effect. △: Among 20 people, 4 to 7 answered that there was a curling effect. Among the names, 3 or less responded that there was a curl effect

(2) Long lash effect The eyelash cosmetic (mascara) was applied to the eyelashes of 20 specialist panels, and the eyelashes were observed with the naked eye to determine whether the eyelashes became longer, and evaluated according to the following criteria.
◎: Among 20 people, 16 or more responded that there was a long lash effect. ○: Among 20 people, 10-15 answered that there was a long lash effect. △: Among 20 people, 4-9 answered that there was a long lash effect. ×: Out of 20, 3 or less responded that there was a long rush effect

(3) Separation effect The eyelash cosmetic (mascara) was applied to the eyelashes of 20 professional panels, and the eyelashes were observed with the naked eye to determine whether the eyelashes were not adhered to each other, and evaluated according to the following criteria.
◎: Among 20 people, 17 or more responded that there was a separation effect. ○: Among 20 people, 11-16 answered that there was a separation effect. △: Among 20 people, 4-10 people answered that there was a separation effect. Among the names, 3 or less responded that they had a separate effect

Example 1 and Comparative Example 1
An oil-in-water mascara composition having the composition shown in Table 2 was prepared by the following production procedure, and its performance was evaluated according to the evaluation method described above. The evaluation results are shown in Table 2.
(Manufacturing procedure)
(1) The phase A mixture shown in Table 2 was heated to 85 ° C, and the phase B mixture was heated to 95 ° C.
(2) The heated phase A and phase B were mixed using a disper mixer and emulsified.
(3) The obtained emulsion was cooled to 60 ° C. with stirring, and components of C phase, D phase and E phase were added and mixed with a disper mixer.
(4) The uniform emulsion was cooled to 32 ° C. to obtain an oil-in-water mascara.

  Looking at Example 1 and Comparative Example 1 in Table 2, at the curl angle in the curl effect (Part 1), the mascara containing the short fiber of the present invention was 18 ° higher than the mascara containing the short fiber A shown in Table 1. In addition, since the curl effect (part 2) was also good, a clear curl-up effect was recognized. Furthermore, it was excellent also in evaluation of the long rush effect and the separate effect. As can be seen from the results, the eyelash cosmetics containing the short fibers of the present invention are significantly superior in curling effect, long rush effect and separation effect compared to the eyelash cosmetics containing round solid fibers. Demonstrated.

Examples 2-4 and Comparative Examples 2-3
An oil-in-water mascara composition having the composition shown in Table 3 was prepared by the same production procedure as in Example 1 and evaluated by the above evaluation method. The evaluation results are shown in Table 3.

  From the results of Table 3, the mascara (Examples 2 to 4) in which the fibers of the present invention were blended was compared with the mascara (Comparative Examples 2 to 3) in which the irregular cross-section hollow fibers having no defects were blended. It turns out that it is excellent in any evaluation item of a long rush effect and a Pareto effect.

Example 5
An oily mascara having the composition shown in Table 4 was prepared by the following production procedure, and its performance was evaluated according to the above evaluation method. As a result, the curl effect, the long lash effect, the separation effect were excellent, and the water resistance and curl durability were further improved. Was also excellent.
(Manufacturing procedure)
(1) A phase A mixture shown in Table 4 was heated to 90 ° C. and mixed uniformly.
(2) The phase B mixture was added to the phase A mixture and pulverized with a roll mill.
(3) Next, the obtained mixture was heated again to 50 ° C., the components of phase C and phase D were added, and uniformly mixed with a disper mixer to obtain an oily mascara.

Example 6
A water-in-oil mascara having the composition shown in Table 5 was prepared by the following production procedure, and its performance was evaluated according to the above evaluation method. As a result, it was excellent in water resistance, curl effect, long rush effect, and separation effect, and was uniformly applied. It was possible to maintain a beautiful finish.
(Manufacturing procedure)
(1) The phase A mixture shown in Table 5 was heated to 95 ° C, and the phase B mixture was heated to 85 ° C.
(2) The heated A phase and B phase were mixed using a disper mixer and emulsified.
(3) The obtained emulsion was cooled to 40 ° C. with stirring, the components of C phase, D phase and E phase were added and mixed with a disper mixer.
(4) The uniform emulsion was cooled to 32 ° C. to obtain a water-in-oil mascara.

Example 7
Water-in-oil foundations having the compositions shown in Table 6 were prepared by the following production procedure.
(Manufacturing procedure)
(1) The mixture of the A phase and the mixture of the B phase were uniformly mixed using a disper mixer at room temperature.
(2) Using a homomixer, the phase A mixture was added to the phase B mixture and emulsified to obtain a water-in-oil foundation.

  This water-in-oil foundation was excellent in water resistance, concealed unevenness and maintained a beautiful finish.

Example 8
A sesame cosmetic having the composition shown in Table 7 was prepared by the following production procedure.
(Manufacturing procedure)
(1) The mixture of the A phase shown in Table 7 was uniformly mixed using the disper mixer at normal temperature.
(2) Next, the mixture of the B phase was added and dispersed uniformly using a disper mixer to obtain a sesame cosmetic.

  When this gorgeous cosmetic is applied to the face and rubbed with a finger, the dirt and fibers on the skin are removed in a lump like an eraser candy, making it easy to use and excellent in removing dirt and old keratin. It was.

  According to the present invention, it is possible to provide a cosmetic for eyelashes that adheres firmly to the eyelashes, has an excellent effect of making the eyelashes look longer and has a natural appearance without dropping, and has an excellent curl effect and separation effect. it can. The cosmetic of the present invention is also useful as a makeup cosmetic such as a foundation and a skin care cosmetic such as a sesame cosmetic. Furthermore, according to this invention, the short fiber useful for preparation of these cosmetics is provided.

Claims (5)

The length is 0.5 to 6 mm, the diameter of the circumscribed circle in the cross section is 20 to 120 μm, the hollowness is 5 to 50%, and the defect rate of the peripheral wall in the cross section is 0.5 to 30%. , and the and fineness of 6-30 dtex, eyelash cosmetics, wherein a portion of the peripheral wall of the hollow portion contains hollow fibers deficient in the longitudinal direction. The cosmetic for eyelashes according to claim 1, wherein the hollow fiber has a length of 1 to 5 mm and a fineness of 8 to 25 dtex. The length is 0.5 to 6 mm, the shape of the cross section is substantially triangular, and have a defect in one side thereof, the diameter of the circumscribed circle of the cross section is 20 to 120, hollow ratio 5 Hollow fiber in which a part of the peripheral wall of the hollow part is missing in the longitudinal direction, which is ˜50%, the defect rate of the peripheral wall in the cross section is 0.5 to 30%, and the fineness is 6 to 30 dtex Cosmetics characterized by containing . The length is 0.5 to 6 mm, the diameter of the circumscribed circle in the cross section is 20 to 120 μm, the hollowness is 5 to 50%, and the defect rate of the peripheral wall in the cross section is 0.5 to 30%. And a hollow fiber having a fineness of 6 to 30 dtex and having a radius of curvature of 0.2 to 15 mm in the length direction and a part of the peripheral wall of the hollow portion missing in the length direction. Features cosmetics. The length is 0.5 to 6 mm, the diameter of the circumscribed circle in the cross section is 20 to 120 μm, the hollowness is 5 to 50%, and the defect rate of the peripheral wall in the cross section is 0.5 to 30%. , and the fineness of the Ri 6 to 30 dtex der, and a portion of the peripheral wall of the hollow portion is deficient in the longitudinal direction, eyelash cosmetic hollow fibers.

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