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Cosmetic foy Eyelashes

a technology for eyelashes and cosmetics, applied in the field of cosmetics for eyelashes, can solve the problems of difficult to obtain a sufficient long lash effect, difficult to achieve curling effect, fibers attached to eyelashes sideways, etc., and achieve superior curling effect, superior long lash effect, and the effect of making eyelashes look longer

Inactive Publication Date: 2008-01-31
SHISEIDO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0020] The present invention can provide a cosmetic for eyelashes wherein, when applied on eyelashes, the fibers line up in the direction of the eyelashes and adhere securely to the eyelashes without falling off, said cosmetic also having a superior long lash effect, i.e. the effect of making eyelashes look longer, and being capable of giving a superior curling effect.

Problems solved by technology

However, it is difficult to obtain a sufficient long lash effect simply by adding fibers to a cosmetic for eyelashes.
Also, the curling effect is hard to achieve.
However, even the cosmetics for eyelashes containing surface-treated fibers and / or wave fibers are applied to eyelashes, each fiber's orientation is random and not in line with others.
That is, the fibers attach to eyelashes sideways and cannot achieve natural looking eyelashes.

Method used

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  • Cosmetic foy Eyelashes
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  • Cosmetic foy Eyelashes

Examples

Experimental program
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Effect test

examples

[0052] The invention is described in specific detail through Examples. The present invention is not limited to these Examples. The blend ratios in the recipes are in relation to the total amount and in mass-percentage units unless specified otherwise.

“Modified Cross-Section Hollow Fibers”

[0053] The modified cross-section hollow fibers used in Examples were prepared with a conventional method by spinning nylon to have pentagonal (cross-section shape of FIG. 1), tetragonal (cross-section shape of FIG. 2), and triangle (cross-section shape of FIG. 3) cross-sections. The hollow ratio is approximately 10%. Nylon fibers, each having a length of 0.5 mm, 1 mm, 2 mm, 3 mm, or 4 mm and a size of 30 μm or 40 μm were blended into the cosmetics for eyelashes of the present invention.

[0054] For Comparative examples, solid (non-hollow) fibers having a round cross-section and those having a triangular cross-section were used. Each of the solid cross-section fibers in Comparative examples has a le...

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Abstract

The present invention is a cosmetic for eyelashes characteristically comprising modified cross-section hollow fibers. What is preferable is a cosmetic for eyelashes characteristically containing said modified cross-section hollow fibers that are polygonal cross-section hollow fibers having depressions so they can orient along the eyelashes wherein the length of the hollow fibers is 0.5-4 mm and the size is 20-50 μm. The object of the present invention is to provide a cosmetic for eyelashes that exhibits a superior curling effect and long lash effect and allows a beautiful finish.

Description

TECHNICAL FIELD [0001] The present invention related to a cosmetic for eyelashes that is used as mascara and such. More specifically it is related to a cosmetic for eyelashes containing modified cross-section hollow fibers. BACKGROUND ART [0002] Conventionally, cosmetics for eyelashes containing fibers, natural fibers and / or synthetic fibers, for the purpose of making eyelashes look longer (long lash effect) have been used. [0003] However, it is difficult to obtain a sufficient long lash effect simply by adding fibers to a cosmetic for eyelashes. Also, the curling effect is hard to achieve. Therefore, surface treatments of fibers have been investigated (see Patent Citation 1 for example). Furthermore, investigations have been carried out on blending in fibers having forms that facilitate orienting along eyelashes, utilizing fibers having modified cross-sections (see Patent Citation 2). [0004] For cosmetics for eyelashes that aim at increasing the volume of eyelashes, investigations ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A45D40/30
CPCA61K8/027A61Q1/10A61K2800/41A61K8/0279C08L2203/12A61K8/88A61K8/72
Inventor KURAHASHI, TAKUMAKANEKO, KATSUYUKI
Owner SHISEIDO CO LTD
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