JP4817441B2 - Eyelash cosmetics - Google Patents

Description

  The present invention relates to a cosmetic for eyelashes used as a mascara or the like. More specifically, the present invention relates to a cosmetic for eyelashes containing a modified cross-section hollow fiber.

Conventionally, for eyelash cosmetics, for the purpose of making the eyelashes appear long (long lash effect), fiber-containing cosmetics containing natural fibers and synthetic fibers have been used.
However, it is difficult to obtain a sufficient long lash effect simply by blending fibers into the eyelash cosmetic. Also, the curl effect is difficult to produce. Then, examination which performs surface treatment processing to a fiber is made (for example, refer to patent documents 1). Furthermore, paying attention to the irregular cross-sectional shape of the fiber, studies have been made on blending a fiber having a shape that can be easily oriented to the eyelashes (see Patent Document 2).

  Moreover, in the cosmetics for eyelashes aiming at the volume-up effect, examination which mix | blends the fiber which has a wave is made | formed (for example, refer patent document 3).

However, even in eyelash cosmetics containing surface-treated fibers and wave fibers, when applied to the eyelashes, the directions of the individual fibers are not aligned and fall apart. That is, fibers adhere to the eyelashes sideways, and natural eyelashes cannot be produced.
On the other hand, it is possible to produce natural eyelashes by using a modified cross-section fiber. However, reduction of the curl effect is inevitable.

On the other hand, various patents have been filed for a method for producing a modified cross-section fiber (for example, see Patent Documents 4 and 5). Although hollow fibers have been developed as swimsuit hollow fibers (see, for example, pages 156 to 157 of Non-Patent Document 1), they have never been used in eyelash cosmetics.
JP 2002-154932 A JP 2004-107237 A JP 2002-308735 A JP-A-5-132812 Japanese Patent Publication No. 4-33893 World of high-tech textiles Published by Tatsuya Motomiya Nikkan Kogyo Shimbun

  The present invention has been made in view of the above circumstances, and when applied to the eyelashes, the fibers are aligned so that the direction of the fibers is along the eyelashes. An object of the present invention is to provide eyelash cosmetics that have an excellent long lash effect and can impart a curling effect.

  As a result of intensive studies in view of the above-mentioned viewpoints, the present inventors do not blend fibers having the same circular cross section as the cross section of the eyelashes, but instead use hollow fibers having an irregular cross section different from a circular or elliptical shape. Surprisingly, it has been found that the above-mentioned problems can be solved by blending into cosmetics for cosmetics, and the present invention has been completed.

That is, the present invention provides an eyelash cosmetic comprising the modified cross-section hollow fiber so that the deformed cross-section hollow fiber is a cross section having a shape recessed on each side of the cross section so that the eyelash conforms to the eyelash. Polygonal cross-section hollow fiber (excluding pentagonal cross-section hollow fiber) having depressions that can be oriented in the direction of the hollow fiber, the length of the hollow fiber is 0.5 to 4 mm, and the thickness is 20 to 50 μm The eyelash cosmetic is provided.

Furthermore, the present invention provides the above-described makeup for eyelashes, wherein the polygonal cross-section hollow fiber (excluding the pentagonal cross-section hollow fiber) has a cross-sectional shape in which each side of the polygon is recessed in an arc shape. A fee is provided.

  According to the present invention, when applied to the eyelashes, the fibers are aligned so that the direction of the fibers is along the eyelashes, and it is excellent in the effect of making the eyelashes appear longer without causing the fibers to fall firmly and adhere to the eyelashes. It can provide eyelash cosmetics with excellent effects.

  Hereinafter, the present invention will be described in detail.

  The modified cross-section hollow fiber used in the present invention has a cross section other than a circle or ellipse. The cross section of the fiber has a triangular shape, a quadrangular shape, a pentagonal shape, a polygonal shape, or other specific shape, and the inside is a continuous hollow fiber. The fiber which has a hollow which can be oriented to eyelashes in the outer periphery (part corresponding to the side of the polygon which connects each vertex) of a fiber cross section is preferable. Specifically, it has a cross section shown in FIGS. In particular, a hollow fiber having a modified cross section of a triangle (FIG. 3), a quadrangle (FIG. 2), and a pentagon (FIG. 1) is preferable, and a modified cross-section hollow fiber of a pentagon (FIG. 1) is most preferable. FIGS. 7 to 9 are perspective views of hollow fibers having pentagonal, quadrangular, and triangular cross sections (partial perspective views of the length of a portion of the fiber, and a portion of the side surface of the fiber is shown in black. ).

  As shown in each figure, the depression that can be oriented in the eyelashes preferably has a shape in which each side of the polygon of the cross section is recessed in an arc shape. By this depression, the orientation of the irregular cross-section hollow fibers (fibers attached in the same direction as the eyelashes) is greatly improved, and the long lash effect is improved. Moreover, the phenomenon in which the fibers stick to the eyelashes in the lateral direction and stick out is suppressed, and the beautiful finishing effect is greatly improved.

  1 to 6, the eyelashes are represented by a circular cross section having a diameter of 80 μm. This represents a state in which the modified cross-section hollow fibers are oriented along the eyelashes. The hollow portion of the hollow fiber is a white portion in the figure. The cross-sectional shape of the hollow portion is not limited, but a circular shape as shown in each drawing is preferable.

  The material of the fiber is not particularly limited as long as it is a synthetic fiber that can be hollow processed. Specific examples include synthetic fibers such as nylon, polyester, polypropylene, rayon, cupra, acetate, triacetate, acrylic, polyurethane, vinylon, promix, pinilon, and polynosic. Particularly preferred fiber materials are nylon and polyester.

  The modified cross-section hollow fiber used in the present invention may be produced by a known method by spinning a synthetic fiber using a spinneret designed in an arbitrary shape. Although the modified cross-section hollow fiber itself is not a novel fiber, using it for eyelash cosmetics is an epoch-making invention also from the viewpoint of the effect of the present invention. The degree of hollowness (hollow rate) is preferably around 10% from the viewpoint of the spinneret nozzle design. The hollow structure is not limited.

The length of the modified cross-section hollow fiber is preferably 0.5 to 4 mm, and more preferably 2 to 3 mm. If it is less than 0.5 mm, the effect of making the eyelashes look longer is poor. On the other hand, if it exceeds 4 mm, it is difficult to produce natural eyelashes, and furthermore, it is difficult to apply a cosmetic for eyelashes containing this.
It should be noted that in the case of having a triangular, quadrangular, or pentagonal cross section, the length of 2-3 mm is superior to the length of 4 mm, and the most preferable length is about 2 mm.

The thickness of the irregular cross-section fiber is preferably 20 to 50 μm, more preferably 30 to 40 μm. If it is less than 20 μm, the fibers are not stiff and it is difficult to orient straightly to the eyelashes, so that the effect of making the eyelashes look longer is poor. It is difficult to apply the eyelash cosmetic containing the. Most preferably, it is 40 μm in a pentagonal irregular cross-section fiber.
The thickness of the irregular cross-section fiber is the diameter of the circumscribed circle of the fiber cross section. 1 to 6, the circumscribed circle of the irregularly shaped cross-section fiber indicated by diagonal lines is indicated by a solid line.

  The content of the modified cross-section fiber is preferably 0.5 to 8.0% by mass, more preferably 1 to 7% by mass, based on the total amount of the eyelash cosmetic. If it is less than 0.5% by mass, the effect of making the eyelashes look longer is poor. On the other hand, if it exceeds 8.0% by mass, it is difficult to produce natural eyelashes, and a cosmetic for eyelashes containing this becomes difficult to apply.

  The irregular cross-section fiber may be a fiber dyed in an arbitrary color. Various surface treatments may be performed as necessary.

  The eyelash cosmetic of the present invention preferably contains a wax. The wax means a solid oil component at normal temperature. Specifically, beeswax, candelilla wax, cotton wax, carnauba wax, bayberry wax, ibota wax, whale wax, montan wax, nukarou, lanolin, kapok wax, molasses, lanolin acetate, liquid lanolin, sugarcane wax, lanolin fatty acid isopropyl, hexyl laurate, Reduced lanolin, jojoba wax, hard lanolin, shellac wax, bees wax, microcrystalline wax, paraffin wax, POE lanolin alcohol ether, POE lanolin alcohol acetate, POE cholesterol ether, lanolin fatty acid polyethylene glycol, fatty acid glyceride, hydrogenated castor oil, petrolatum, POE hydrogen Addition lanolin alcohol ether, alkyl silicone, jojoba ester and the like. One or more of these waxes are selected and used.

Although the compounding quantity of the wax to the cosmetics for eyelashes is adjusted suitably, Preferably it is 1-30 mass%, More preferably, it is 5-25 mass%.
If the blending amount is less than 1% by mass, the effect of the present invention may not always be sufficient. On the other hand, if the blending amount exceeds 30% by mass, makeup lasting becomes worse. In addition, the stickiness and hardness are increased, making application difficult.

  The eyelash cosmetic of the present invention preferably contains a film-forming resin. Specifically, latexes such as polyvinyl alcohol, polyvinyl pyrrolidone, polyvinyl acetate, polyalkyl acrylate, dextrin, cellulose derivatives such as alkyl cellulose and nitrocellulose, trimethylsiloxysilicic acid, trimethylsiloxysilylpropylcarbamic acid, fluorine-modified Silicone resins such as silicone and acrylic silicone are used. One or more of these resins are selected and used. Among these, trimethylsiloxysilicic acid is particularly preferable. As commercially available products, KF7312J, X-21-5250 (both manufactured by Shin-Etsu Silicone Co., Ltd.) and the like can be used.

  Although the compounding quantity of film forming resin (solid content) to the eyelash cosmetics is adjusted suitably, Preferably it is 1-25.0 mass%, More preferably, it is 2.0-20 mass%. If the blending amount is less than 0.1% by mass, the curling maintenance effect may be reduced and the secondary adhesion between fibers may occur. Also, from the viewpoint of fiber adhesion, if the film-forming resin is small, fiber dropping may occur. On the other hand, if the blending amount exceeds 25.0% by mass, it becomes difficult to apply, which is not preferable.

  In the present invention, it is preferable to mix a coloring material. The color material is not particularly limited as long as it is generally used for makeup cosmetics. For example, talc, mica, kaolin, calcium carbonate, zinc white, titanium dioxide, red iron oxide, yellow iron oxide, black iron oxide, ultramarine, bitumen, carbon black, low-order titanium oxide, cobalt violet, chromium oxide, chromium hydroxide Inorganic pigments such as cobalt titanate, bismuth oxychloride, titanium-mica pearl pigments; red 201, red 202, red 204, red 205, red 220, red 226, red 228, red 405 No., Orange No. 203, 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 such as chlorophyll, β-carotene, etc. Examples of pigments include dyes. These color materials can be used alone or in combination of two or more.

  The blending amount of the color material is adjusted as appropriate. Preferably it is 0.1-30 mass%, More preferably, it is 3-20 mass%. When it exceeds 30 mass%, it is not preferable in terms of adhesion. If it is less than 0.1% by mass, the effect of the coloring material may be insufficient.

  The cosmetic for eyelashes of the present invention is preferable because it can be adjusted to an appropriate viscosity by adding a thickener. Examples of the thickener include dextrin fatty acid ester, bentonite, xanthan gum, and cellulose gum. These thickeners are used alone or in combination of two or more.

  The blending amount of the thickener is appropriately adjusted according to the desired viscosity. Preferably it is 0.1-30 mass%, More preferably, it is 1-20 mass%. If the blending amount is less than 0.1% by mass, it may be difficult to adjust to a sufficient hardness. On the other hand, if the blending amount exceeds 30% by mass, the hardness becomes too high and the smoothness may be lacking.

  In the present invention, eyelash cosmetics can be produced by blending the above-mentioned components by a conventional method. You may add the component which can be normally mix | blended with makeup cosmetics within the quantitative and qualitative 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.

  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.

"Atypical cross-section hollow fiber"
Atypical cross-section hollow fibers used in the examples are made of nylon, pentagon (with the cross-sectional shape in FIG. 1), quadrangle (with the cross-sectional shape in FIG. 2), and triangle (with the cross-sectional shape in FIG. 3) by a conventional method. It is a fiber spun into the cross section. The hollowness is about 10%. Nylon fibers having lengths of 0.5 mm, 1 mm, 2 mm, 3 mm, 4 mm, and thicknesses of 30 μm and 40 μm, respectively, were blended in the eyelash cosmetics of Examples.
As a comparative example, solid fibers (not hollow) having a circular cross section and a triangular cross section were used. The solid cross-section fibers of the comparative example each have a length of 2 mm, a thickness of 30 μm, and are made of nylon.

"Evaluation methods"
(1) Curling effect The eyelashes were applied 10 times with eyelash cosmetics (mascara) by 20 professional panels, the state was observed with the naked eye, and evaluated according to the following criteria.
◎: Out of 20 people, 16 or more responded that the curl effect was effective. ○: Among 20 people, 9-15 responded that the curl effect was satisfied. Δ: Among 20 people, 5-8 responded that the curl effect was effective. ×: Reply that 4 or less of 20 people have curling effect (2) Long lash effect 20 specialist panelists apply each eyelash sample (mascara) 10 times and measure the length of the eyelashes before and after application with a microscope And evaluated by the relative value of the length. Values are shown in the table.
(3) Beautiful finish (degree of fiber orientation in the same direction as the eyelashes)
Each of the 20 professional panelists applied each eyelash sample (mascara) 10 times, the length of the eyelashes after application was observed with a microscope, and the number of fibers protruding from the eyelashes was counted. Values are shown in the table. The smaller the number, the better the finish.

  A mascara containing the above fibers was produced by a conventional method, and (1) curl effect, (2) long rush effect, and (3) finished beauty (degree of fiber orientation in the same direction as the eyelashes) were examined. As a comparative example, the above effect was also examined for a mascara (comparative example 1) blended with solid fibers having a round cross section that was not hollow and a mascara (comparative example 2) blended with solid fibers having a triangular cross section. Table 1 shows the mascara formulation (mass%) and the results.

"Examples 1-9 and Comparative Examples 1-3"
In Table 1, the nylon fiber has shown length, thickness, and cross-sectional shape. For example, the mascara of Example 2 indicates that a hollow nylon fiber having a triangular cross section having a length of 1 mm and a thickness of 40 μm was used. Comparative Example 2 shows that solid nylon fibers having a circular cross section having a length of 2 mm and a thickness of 30 μm were used.

Looking at the results of Comparative Examples 1 to 3, the long effect and the beauty of the finish are improved by changing from a solid fiber having a circular cross section to a solid fiber having a triangular cross section, but the curl effect is all as low as the result. I understand that.
In contrast, in the example using the hollow fiber, the curl effect is dramatically improved as compared with the comparative example. Further, the beauty of the finish is remarkably improved as compared with the solid fiber with the circular cross section of Comparative Example 2 and the solid fiber with the triangular cross section of Comparative Example 3 (Comparative Example 3: 37.3 → Example 3: 27. 3) Further, the long rush effect was also improved and sufficiently recognized (Comparative Example 3: 1.048 → Example 3: 1.053). In particular, the long rush effect shows a remarkable effect at a length of 2 to 3 mm. Moreover, the beauty of the finish shows a remarkable effect at a length of 2 to 4 mm.
From the above, the eyelash cosmetic of the present invention blended with a modified cross-section hollow fiber exhibits a particularly remarkable curling effect and a long lash compared to the non-hollow round solid fiber and the eyelash cosmetic formulated with a modified cross-section fiber. It is extremely effective in terms of effect and beauty.

Tables 2 to 4 give examples of the eyelash cosmetics of the present invention. Both have a beautiful finish that prevents the fibers from jumping out from the eyelashes in all directions when applied to the eyelashes, and also makes the eyelashes appear longer without sticking firmly to the eyelashes and falling off the fibers. A cosmetic for eyelashes that has an excellent long lash effect and a remarkably excellent curling effect.

Water-in-oil mascara

Oil-in-water mascara

Oil-in-water mascara substrate

  When applied to the eyelashes, the cosmetic for eyelashes of the present invention suppresses the fibers from falling apart from the eyelashes in all directions as the direction of each fiber is not aligned. It is possible to produce natural eyelashes. Furthermore, the eyelash cosmetic is particularly excellent in curling effect.

It is sectional drawing which shows the state in which the hollow fiber which has a pentagonal unusual cross section was orientated to the eyelash. It is sectional drawing which shows the state in which the hollow fiber which has a square irregular cross section was orientated to the eyelash. It is sectional drawing which shows the state in which the hollow fiber which has a triangular irregular cross section was orientated to the eyelash. It is sectional drawing which shows the state in which the hollow fiber which has a hexagonal unusual cross section was orientated to the eyelash. It is sectional drawing which shows the state in which the hollow fiber which has a heptagonal unusual cross section was orientated to the eyelash. It is sectional drawing which shows the state in which the hollow fiber which has an octagonal unusual cross section was orientated to the eyelash. It is a fragmentary perspective view of the hollow fiber which has a pentagonal irregular cross section. It is a fragmentary perspective view of the hollow fiber which has a square modified cross section. 1 is a partial perspective view of a hollow fiber having a triangular profile.

Claims (2)

In the cosmetic for eyelashes characterized by containing a modified cross-section hollow fiber, the modified cross-section hollow fiber has a depression that can be oriented along the eyelash by being a section having a shape recessed in each side of the section. A cosmetic for eyelashes characterized in that it is a polygonal cross-section hollow fiber (excluding a pentagonal cross-section hollow fiber), the length of the hollow fiber is 0.5 to 4 mm, and the thickness is 20 to 50 μm. . The cosmetic for eyelashes according to claim 1, wherein the polygonal cross-section hollow fiber (excluding the pentagonal cross-section hollow fiber) has a cross-section in which each side of the polygon is recessed in an arc shape .

Images