JP3187673B2 - Cosmetic applicator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cosmetic applicator having a good feel suitable for highly functional application for foundation cosmetics.

[0002]

2. Description of the Related Art Soft foams such as polyurethane and synthetic rubber are often used as foundation cosmetic applicators. However, cosmetic applicators are used delicately on sensitive skin. The feel to the skin is of particular importance. Improving the feel to the skin, when the applicator is processed for the purpose of improving the texture, the properties such as elongation and the amount of application of the cosmetic during application are greatly affected, and these properties are often inferior. Although improvements have been made as seen in the prior art described in the above, they have not yet reached a satisfactory level. As a conventional touch and texture improvement technology, a method of covering the foam body surface with a flexible synthetic resin layer
Although there is no tingling sensation due to the sharp point of the foam body, it is hardened and the friction resistance increases, the texture is poor, the feeling of tension is strong, and a soft sponge puff is I couldn't say. In the case of applying a flexible resin to a continuous foam and sealing the open pores to a certain depth (Japanese Patent Publication No. 52-20896), the penetration of cosmetics can be stopped by sealing. In addition, the foam hardened significantly due to the impregnation of the flexible resin, and a soft sponge puff having a good texture could not be obtained.

In the method of incorporating a silicone oil having a property of poor compatibility with a foam (Japanese Patent Laid-Open No. Hei 6-311909), the feeling of tightness is eliminated by selecting a silicone oil having poor compatibility with the foam. Although it can be used as cosmetics, silicone-treated talc, silicone-treated mica, silicone-treated titanium dioxide, silicone-treated red iron oxide, silicon-treated yellow iron oxide, silicone-treated zinc oxide, carbinol-modified siloxane, squalane, liquid paraffin, etc. The emulsified foundation in which the cosmetic ingredients are mixed does not fit well with the specific silicone oil, and the cosmetic does not adhere well to the skin. In addition, it is inevitable that quality instability such as separation of cosmetics is incurred, and a problem unfavorable in quality of cosmetics has occurred.

On the other hand, in order to improve the surface structure of the foam, the main body is made of a flexible air-permeable foam according to the invention of the present inventor, and the application surface is a liquid impermeable layer, Micropores provided only on the surface of the transmission layer
There is a method in which the fine foamed layer is torn to generate fine feather-like naps, and the outer surface having the feather-like naps is used as a cosmetic-applied surface (Japanese Patent Publication No. 4-15681).
Since the foam surface has a very soft feeling and has fine pores on the surface, it is optimal for low-viscosity emulsion foundations and liquid foundations, but at the initial use, cosmetics penetrate into the continuous pores of the puff. As a result, the amount of the cosmetic on the application surface is extremely reduced, so that the frictional resistance at the time of application is large. As a result, the extension of the cosmetic is poor, and there has been a problem that only a thin coating can be performed.

[0005]

As a sponge puff having an excellent soft feel and texture to the skin, there are a main body made of a flexible foam and a fine foam having a continuous foam finer than the main body on the surface of the main body. The outer surface of the sponge puff having the layers adhered thereto and the fine foam layer of the laminated sponge puff has an excellent hand feeling of a sponge puff having fine fluffy raised brushes generated by tearing of the foam layer, and Fine pores make it ideal for low-viscosity liquid foundations and emulsion foundations, but at the time of initial use, cosmetics penetrate into the puff's fine continuous pores and increase penetration due to the pressure of the fingers during application. As a result, puffs and cosmetics are poorly stretched because the cosmetics on the surface of the puffs are only slightly contained, and the coating has to be thinly applied. Sponge puff to all the functionality of sufficiency had not yet obtained. In the present invention, it is possible to form a puff having a soft feeling brought about by the above structural improvement and exhibiting excellent performance in terms of coating functionality, and has no adverse effect on the quality of cosmetics. In addition, a sponge puff with excellent cosmetic properties and excellent texture, soft feeling and application function were obtained.

[0006]

SUMMARY OF THE INVENTION The cosmetic applicator of the present invention improves the sponge puff disclosed in Japanese Patent Publication No. 4-62721 and Japanese Patent Publication No. 4-56861 according to the inventor's earlier invention. In the continuous pores of the fine foam layer of the soft cosmetic applicator comprising a main body made of a flexible foam and a fine foam layer having fine continuous foam laminated on the surface of the main body, or of the fine foam layer. Soft feel, texture and coating functionality are achieved by impregnating the continuous pores of the fine foam layer of a soft cosmetic tool with fine fluffy brushes generated by tearing the entire outer surface with a cosmetic oil compatible with cosmetics. This is a drastically improved cosmetic applicator. The soft sponge puff of the present invention does not impair the soft feeling at all, exhibits the effect of seeping out the cosmetic on the application surface, a so-called smoothing effect, and is well compatible with the cosmetic, affecting the quality of cosmetics and affecting the skin. And there is no problem in terms of safety.

As a material for forming the foam body, general-purpose synthetic rubber latex and natural rubber latex can be used, and in addition, a synthetic resin capable of obtaining a flexible foam can be used. NB from the comprehensive aspects such as skin feel, texture, sensation, flexibility, mass and economics
R (nitrile-butadiene rubber) latex is most suitable. The material for forming the fine foam layer to be laminated on the applicator main body may be the same or different from the main body forming material, but polyurethane is dissolved in a solvent such as dimethylformamide and a foam regulator is mixed. It is preferable to apply the so-called polyurethane wet coagulation method in which a dope is applied and immersed in water. Furthermore, in order to laminate the wet foamed layer of the polyurethane on the foam body, a conventional compounding agent such as a vulcanizing agent, a vulcanization accelerator, a gelling agent and the like is added to the NBR latex on the fine foamed layer sheet. What is foamed by a foaming machine may be directly cast and vulcanized to have a thickness of 50 to 500 μm, or a wet foamed sheet of polyurethane of the above thickness may be preliminarily vulcanized and molded into an NBR foam. It can also be formed. At this time, it is preferable to provide an adhesive or a dense layer between the applicator body and the fine foam layer as a blocking layer for blocking the passage of the cosmetic oil.

[0008] In order to provide a fine fluffy nap by tearing the outer surface of the fine foam layer, a fine foam sheet is formed on a carrier such as a nonwoven fabric by a wet coagulation method at the time of producing a wet foam sheet of polyurethane. Next, the NBR latex foam is cast on the fine foam sheet with the nonwoven fabric face down and vulcanized to a desired thickness, and then the nonwoven fabric is forcibly peeled off from the end. It is torn and a fine fluffy nap is formed on the tear surface.

The cosmetic oils suitable for the present invention include liquid paraffin, squalane, glycerin trioctanoate,
Octyldodecyl myristate, isocetyl stearate, isocetyl alcohol, decamethylcyclopentanesiloxane, copolymer of dimethylsiloxane and polyoxyalkylenesiloxane, trimethylsiloxysilicic acid, glycerin tri-2-ethylhexanoate, tetra-2-ethyl Erythritol hexanoate, trimethylolpropane triisostearate, neopentyl glycol dicaprate, ethylene glycol di-2-ethylhexanoate
Examples thereof include types or a mixture of two or more types, but are not limited to these oil agents. In order to improve the compatibility of the cosmetic oil with the cosmetic, the ratio of inorganic to organic (IOB value) of the cosmetic oil is determined by the required HL of the cosmetic.
What is necessary is just to match with B value. Cosmetic oil may be directly impregnated into the fine foam layer. However, dimethyl silicone crosslinked elastic material in the form of ultrafine particles, such as Trefil E-505C (a product of Dow Corning Toray Co., Ltd.), Trefil E-506C ( Same as above), a fine foamed layer impregnated with a cosmetic oil may be impregnated into a slurry. The amount of the cosmetic oil to be impregnated in the applicator are 50~500g fine foam layer per m ^2, and preferably from the range of 100 to 300 g. The method of impregnation is not limited, and for example, an appropriate means such as treatment by coating, spraying, dipping, and squeezing with a mangle can be used.

[0010]

EXAMPLE 1 A sponge puff is manufactured by laminating a polyurethane fine foam layer on the surface of an NBR foam body by a wet coagulation method. A dimethylsiloxane and methyl (polyoxyethylene) siloxane copolymer (a product of Toray Dow Turning Co., Ltd.,
A 30% aqueous solution of SH3771C) was applied in an amount of 200 g / m ² ,
After drying at 30 ° C. for 30 minutes, a sponge foundation shown in FIGS. 2 and 5 was prepared. As a result of using a commercially available foundation using the above-mentioned sponge puff, the amount of the foundation to be sucked is small, the texture is good, the touch can be applied without any resistance with a light touch, and the extension of the cosmetic is good, and the skin is thin. There was no dark application. The electron micrographs of the fine foam layer before and after use at this time are shown in FIGS. 1, 3 and 4 show electron micrographs according to the prior art. 2, 5, and 6 show electron micrographs according to Example 1. FIG.

[0011]

Embodiment 2 A polyurethane fine foam layer is laminated on the surface of an NBR foam body by a wet coagulation method. Next, the surface of the wet polyurethane microfoam is thinly torn to form a surface having fine fluffy naps on the surface. Furthermore, liquid paraffin is added to the sponge puff having the fine fluffed brush.
24%, Trimethylsiloxysilicic acid (Toray Dow Corning KK, DC-593) 59%, Dimethylsiloxane and methyl (polyoxyethylene) siloxane copolymer (Toray Dow Corning KK, SH-3771C) 17% Is impregnated with a 200 g / m ² coating amount of a cosmetic oil mixed with stirring.
dry. Using the obtained puff, a W / O emulsion type foundation was applied to the skin. The amount of suction of the foundation was small, and the foundation could be applied without any smooth feeling during use. In addition, the extension of the cosmetics was remarkable, and there was no thinning and a thick application was possible.

[0012]

Example 3 Using a sponge puff in which a polyurethane fine foam layer was laminated on the surface of an NBR foam body by a wet coagulation method, squalane 10%, isocetyl alcohol 33%, trioctane was applied to the surface of the wet polyurethane fine foam layer. A cosmetic oil prepared by mixing and stirring 18% of glyceryl acid and 39% of liquid paraffin was applied at 200 g / m ² and dried. An O / W emulsion type foundation was applied to the skin using the puff.
There was little suction of the foundation, and even when using the puff, it could be applied smoothly and without any resistance. In addition, the extension of the cosmetics was remarkable, and there was no thinning and a thick application was possible.

[Brief description of the drawings]

FIG. 1 is a photograph (50 × magnification) of a cross-sectional structure of a sponge puff laminated according to a conventional technique.

FIG. 2 is a photograph (50 × magnification) of a cross-sectional structure of a sponge puff laminated according to Example 1.

FIG. 3 is a photograph of a cross-sectional structure of a laminated sponge puff microfoam layer according to the prior art (magnification: 600 before use of cosmetics).
Times).

FIG. 4 is a photograph of a cross-sectional structure of a sponge puff fine foam layer laminated according to the prior art (after using cosmetics, magnification: 600).
Times).

FIG. 5 is a photograph of a cross-sectional structure of a laminated sponge puff fine foam layer according to Example 1 (magnification: 600 before use of cosmetics).
Times).

FIG. 6 is a photograph of a cross-sectional structure of a sponge puff fine foam layer laminated according to Example 1 (after using cosmetics, magnification: 600).
Times).

Continuation of the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) A45D 33/00-40/30 A46B 1/00-17/08 A46D 1/00-9/06 C08J 9/00-9 / 42

Claims (1)

(57) [Claims] 1. A main body made of a flexible foam, and a fine foam layer laminated on the surface of the main body and having a finer continuous foam than the main body. a cosmetic applicator good cosmetic oil compatibility is being impregnated, the amount of the cosmetic oil to be impregnated into the communicating hole of the finely foamed layer is in the range of 50 to 500 g in finely foamed layer per m ² A cosmetic applicator characterized in that: