JPS63277006A - Cosmetics applicator for liquid foundation - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a cosmetic applicator for liquid foundation.

[Conventional technology]

Various foams such as rubber foams and polyurethane foams have been widely used as cosmetic applicators for liquid foundations.

In particular, foams are often used because they have a porous structure, hold cosmetics well, have elasticity, and feel good on the skin when used.

[Problem that the invention seeks to solve]

When using conventional porous foam cosmetic applicators to apply liquid cosmetics to the skin, they may produce a streaky finish or
The applied part is I! There are disadvantages in that the cosmetic becomes pale and uneven, and furthermore, there is a problem in that the cosmetic penetrates into the interior of the applicator during application, resulting in wasted consumption of the cosmetic.

These phenomena are particularly noticeable in liquid foundations, especially low-viscosity cosmetics, and therefore there is a strong desire for improvements in cosmetic applicators.

Conventionally, among the drawbacks of applicators, the cause of the unevenness phenomenon is that the foam pores of the foam are large (in normal foam, the foam pores of urethane foam are 20μ to 10μ).
00μ, latex foam foam pores 30-3000μ
), and various studies have been conducted to solve this problem.

For example, attempts have been made to utilize the surface layer that normally forms on the surface in contact with the mold surface at the time of molding the porous foam, or to roughen this surface layer using a grinder or the like.

However, applicators that simply use a surface layer,
Since 1fill had a smooth surface, the cosmetic was not easily absorbed, and when the cosmetic was applied, it slipped on the skin surface, making it impossible to apply thickly, making it impractical.

In addition, those whose surface layer is roughened with a grinder etc.
Although the retention of cosmetics is somewhat improved compared to the one that simply uses a face membrane, the application surface has a raised, uneven surface, which causes a problem of irritation to the skin.

Still another method is to form a foam by mixing organic particles or inorganic particles that can be dissolved in water or an aqueous solution in a rubber or synthetic resin liquid, and then molding the foam with water or a water WI liquid. Attempts have also been made to remove the elution pores of the fine particles (which can be controlled within ±20 μm) to create an applicator with fine pores.

Since the surface of the applicator thus obtained is finished as a finely porous surface, problems such as streaks and unevenness are solved. However, there are problems in that cosmetics migrate into the applicator, wasting cosmetics, and because the pores are smaller than conventional foams, the applicator lacks elasticity and feels soft when used. A new problem arises: the lack of

[Means for solving problems]

The present invention solves the conventional problems as described above, and when applying liquid foundation, there is no streaky or uneven finish, and a uniform finish is achieved, and there is no phenomenon of penetration of cosmetics into the applicator. Another object of the present invention is to provide a cosmetic applicator that is highly elastic and provides a soft feel.

According to the present invention, the main body of the cosmetic applicator is made of a flexible, breathable foam, the application surface is a liquid-impermeable layer, and only the surface of the liquid-impermeable layer is dissolvable in water or an aqueous solution. The above-mentioned problems have been solved by a cosmetic applicator for liquid foundation, which is characterized by being provided with micropores formed by fine particles.

(Function) In the present invention, since a flexible and breathable foam (latex foam, urethane foam, etc.) is used for the applicator body, it is elastic and provides a soft feel.

In addition, the application surface of the applicator is a liquid-impermeable layer, and the micropores are formed only on the surface of the liquid-impermeable layer and do not communicate with the inside of the applicator, so the cosmetics can be absorbed into the applicator. It does not penetrate and prevents unnecessary consumption of cosmetics.

Since the surface of the liquid-impermeable layer, which is the coating surface, is provided with micropores formed by fine particles that can be dissolved in water or an aqueous solution, the cosmetic material is well absorbed.

In addition, the diameter of the micropores is relatively small and there is no inconvenience that the cosmetics once inside the applicator are pressed during application and come out to the surface unlike normal foams, so the cosmetics may not be applied unevenly. does not occur.

(Example) Hereinafter, the present invention will be described in detail based on the example shown in the drawings.

FIG. 1 is a sectional view showing an embodiment of the cosmetic applicator of the present invention. The main body 1 of the cosmetic applicator is made of a breathable foam that is flexible even in a dry state, and a liquid-impermeable layer 2 is integrally provided on the cosmetic application surface of the applicator main body 1. Only the surface of the liquid-impermeable layer 2 is provided with micropores 3 formed of microparticles that can be dissolved in water or an aqueous solution.

In this embodiment, the liquid-impermeable layer 2 is formed as a non-porous film layer.

FIG. 2 is a sectional view showing another embodiment of the cosmetic applicator of the present invention. This embodiment has almost the same structure as the embodiment shown in FIG. 1, but whereas the liquid-impermeable layer 2 in the embodiment shown in FIG. The difference is that it is an impermeable foamed film layer (closed cell foam). Micropores 3 are formed only on the surface of the surface i portion 4 of the R foam film layer by elution of microparticles that can be dissolved in water or an aqueous solution.

FIG. 3 is a sectional view showing another embodiment of the cosmetic applicator of the present invention. In this example, the applicator main body 1 and liquid droplet transmission! ! 2 are bonded together with an adhesive, so that an adhesive layer 5 is formed between the applicator main body 1 and the liquid-impermeable layer 2. The liquid-impermeable layer 2 may be either a non-porous film layer or a foamed film layer.

FIG. 4 is a sectional view showing still another embodiment of the cosmetic applicator of the present invention. In this embodiment, both lll! of applicator main body 1! A liquid-impermeable layer 2 having micropores 3 is integrally provided at J.

In the embodiment shown in FIG. 5, a liquid-impermeable layer 2 having micropores 3 is integrally provided on both sides of the applicator body 1 with an adhesive layer 5 interposed therebetween.

In the embodiment shown in FIG. 6, the applicator body 1 and the liquid-impermeable layer 2 are bonded together using an adhesive 5, as shown in FIG. 1 or 2. Both sides are the coating surfaces.

In each of the embodiments shown in FIGS. 4 to 6, the applicator main body 1
Liquid-impermeable layers 2 are provided on both sides of the applicator body 1, but if the entire surface (upper and lower coating surfaces and side surfaces) of the applicator body 1 is covered with the liquid-impermeable layer 2, air circulation in the applicator will become poor. Since it does not dent even when pressed, and the soft feeling during use is impaired, it is preferable to leave the part that is not covered with the liquid-impermeable layer 2. For example, leave a part or all of the side surface of the applicator in place. It's a good idea to leave it there.

As the foam which is flexible even in a dry state and has air permeability constituting the applicator main body 1 of the present invention, for example, synthetic resin R foam such as polyurethane or rubber foam may be used.

The stock solution for forming the liquid-impermeable layer 2 includes synthetic resin liquids such as polyurethane emulsion and polyacrylic acid ester emulsion, NBR latex, SBR latex, and NBR latex.
Rubber latex such as R latex, silicone rubber latex, and fluoro rubber latex can be used. If the liquid-impermeable layer 2 is to be a foamed film layer, a foaming agent may be mixed into these raw materials or air may be blown into the foamed layer.

The fine particles 12 (see FIG. 7) that can be dissolved in water or an aqueous solution for forming micropores 3 on the surface of the liquid-impermeable layer 2 include starch, dextrin, and higher alcohols (for example, oleyl alcohol, stearyl alcohol, and pentaerythritol). , polyethylene glycol, polyethylene glycol, etc.), fatty acids (for example, stearic acid, oleic acid, etc.) may be used.

In addition to these, fibrous fine particles can also be used. For example, the shortness of alginate alkali metal salts such as calcium alginate and aluminum alginate! ! Fibrous fibers, pulp mii, fibrous particles of alkali metal salts of polyacrylic acid, cottonseed flakes, flax meal, etc. may also be used.

The size of the fine particles (particle size or IIN diameter) is related to the micropores 3 formed by the elution of the fine particles and the viscosity and formulation of the cosmetic, so the optimum one may be selected as appropriate.

However, if the fine particle size is too large, it will lead to unevenness of the cosmetic, so it is preferable to select a particle size between about 5 and 200 microns. For general liquid foundations, a thickness of about 20 to 80 microns is good.

Water or an aqueous solution is used to elute the fine particles. This aqueous solution may be an acidic aqueous solution or an alkaline aqueous solution, or an aqueous solution containing an oxidizing agent, a reducing agent, or an enzyme.

In the embodiments shown in FIGS. 3, 5, and 6, the applicator body 1 and the liquid-impermeable layer 2 or the applicator bodies 1 and 1 are bonded together, but the adhesive As polyurethane type, polyester type, polyamide type, acrylic type,
A solution type adhesive such as a rubber type adhesive or a hot melt type adhesive can be used.

A method for manufacturing the cosmetic applicator of the present invention will be explained.

FIG. 7 is a schematic sectional view showing the manufacturing process of the cosmetic applicator shown in FIG. 1 or 2. FIG.

First, as shown in FIG. 7a, a water-soluble adhesive 11 is applied onto the base material 10 by roll coating or spray coating.

As the base material 10, a sheet-like material such as waterproof paper, a metal or synthetic resin sheet (in this case, a finely textured sheet by embossing may be used) is used.

As the water-soluble sizing agent 11, soluble starch, dextrin,
Glue, milk casein, wheat gluten, soybean casein, methylcellulose, carboxymethylcellulose,
Hydroxylethyl cellulose, polygonyl alcohol, sodium alginate, gum arabic, gum tragacanth, sodium polyacrylate, polyethylene oxide, etc. can be used.

Next, the surface of the water-soluble adhesive 11 is coated! Fine particles 12 soluble in water or an aqueous solution are sprayed and planted. In this case, in order to prevent the fine particles 12 from being buried as shown in FIG. 7a, the viscosity of the water-soluble glue 11 must be adjusted or
Alternatively, the coating amount may be adjusted to the particle size.

After this water-soluble glue 11 dries, the above-mentioned stock solution of the liquid-impermeable layer 2 is applied thereon, dried, and the liquid-impermeable layer 2
(a non-porous film layer or a foamed film layer). As shown in FIG.
and the liquid-impermeable layer 2.

Next, the sheet-like material obtained in the above step is placed in a mold, and a foaming stock solution is injected from above to form a foam 1 (forming the applicator body 1) integrally with the liquid-impermeable layer 2. (7th
(See Figure C). Note that a generally employed method may be used to form the foam. For rubber latex,
Rubber latex, foaming aid, coagulant, etc. are mixed, foamed to 2 to 8 times the size by blowing air, poured into a casting mold, solidified, steamed, vulcanized, and washed to form a foam. do. In the case of polyurethane, polyol or polyester, water and isocyanate are mixed and stirred and poured into a casting mold, and the mixture is reacted and foamed to form a foam.

Next, the product thus obtained is taken out from the mold, and the base material 10 is peeled off as shown in FIG. 7d.

Thereafter, the water-soluble adhesive 11 and the water-soluble fine particles 12 are removed by washing with water, and as shown in FIG. obtain. In this way, the cosmetic applicator shown in FIGS. 1 and 2 is obtained.

In order to manufacture the cosmetic applicator shown in FIG.
A sheet-like product is formed in which the fine particles 12 and the liquid-impermeable layer 2 are integrated. Next, the base material 10 is peeled off, and the water-soluble adhesive 11 and the water-soluble fine particles 12 are removed by washing with water.

In this way, the liquid-impermeable layer 2 having micropores 3 on the surface
A sheet-like product is manufactured. This sheet-like material 2 and a separately prepared foam 1 are pasted together using an adhesive 5.

To manufacture the cosmetic applicator shown in FIG. 4, the base material 10, the water-soluble glue 11, the fine particles 12, and the liquid-impermeable layer 2 are integrally formed as described in FIGS. 7a and 7b. First, prepare a sheet-like material. This sheet-like material is placed on both the upper and lower surfaces of a mold, and a foaming raw material is injected between them to form a foamed body 1. After that, the base material 10 on both sides of the foam 1 is peeled off and the water-soluble glue 11 and the water-soluble fine particles 12 are removed by washing with water, resulting in a cosmetic product having a liquid-impermeable layer 2 on both sides with micropores 3 on the surface. An applicator is obtained.

In the method described above, a sheet-like material is used as a base material, and the water-soluble glue 11, fine particles 12, and liquid-impermeable layer 2 are applied to this material. You can also use it. In this case, the water-soluble glue 11 is applied directly to the surface of the casting mold, and the fine particles 1 are applied on top of it.
After drying, the liquid impermeable layer 2 undiluted solution is applied from above, and after this has dried, the foaming undiluted solution is injected.

After the foam is molded, take it out from the mold and add water-soluble glue 1.
1 and the fine particles 12 may be removed by washing with water.

Still another method for manufacturing the cosmetic applicator of the present invention uses a foam 1 provided with a surface layer, and utilizes this surface layer to form fine pores 3.
A liquid-impermeable layer 2 is formed.

That is, a foam from which the surface layer has not been removed is prepared, an undiluted solution of the liquid-impermeable layer 2 is applied onto the surface layer, and before this solution dries, water-soluble fine particles 12 are sprinkled on it, and the undiluted solution is dried. After solidification, it is washed with water or an aqueous solution to remove fine particles.

In this way, the liquid-impermeable layer 2 coated on the surface layer is prevented from permeating into the foam by the surface layer, and forms the liquid-impermeable layer 2 together with the surface layer. Furthermore, since the fine particles 12 are dispersed and implanted before the stock solution dries, the fine pores 3 are left behind after the fine particles are removed.

With this method, water-soluble glue and base materials are not required.

Regardless of the manufacturing method, the applicators obtained had no difference in their usability, and were extremely good as applicators for liquid foundations.

More specific examples will be described in detail.

, <Example 1> A water-soluble sizing agent mixed with 25 parts by weight of soluble starch and 75 parts by weight of water is applied to a polypropylene film having a thickness of 30 microns at a rate of 120 Q/m'.

Calcium alginate short fibers having a thickness of 2 denier and a length of 1.01 mm are sprinkled on top of this at a rate of 500/m'.

Then, dry at 80°C.

After the water-soluble glue has dried, add 2 balls #1571 (product of Nippon Zeon Co., Ltd.) (NBR latex) 100 weight parts, Sumitex Resin M-3 [product of Sumitomo Chemical Industries, Ltd.] (crosslinking agent) 3 weight , Sumitex Accelerator-ACX (Product of Sumitomo Chemical Co., Ltd.) (Catalyst) A spray solution consisting of 0.51 parts by weight was sprayed onto the water-soluble glue at a ratio of 800/m2, and dried. .

The sheet thus obtained was attached to the inner wall of a casting mold.

Next, 100 parts by weight of Nipol LX-511 (product of Nippon Zeon Co., Ltd.) (NBR latex), 0.5 parts by weight of trimene base (polyamine, formalin condensate), and Tsukusela EZ (product of Ouchi Shinko Chemical Industry Co., Ltd.) were added. product)
0.51 parts by weight, Tsukusela MZ (product of Ouchi Shinko Chemical Industry Co., Ltd.) (vulcanization accelerator) 0.5 parts by weight, Antige SP [product of Kawaguchi Chemical Industry Co., Ltd.] (antiaging agent)
1 part by weight, 3.5 parts by weight of sulfur powder, potassium oleate (2 parts by weight)
Mixture A1 consisting of 3 parts by weight of foam stabilizer (0% aqueous solution) and 5 parts by weight of ammonium stearate (30% aqueous solution)
To 50 parts by weight, 20 parts by weight of 25% water emulsion of zinc white (vulcanization activator), 1.8 parts by weight of Accel D (product of Kawaguchi Chemical Industry Co., Ltd.) (vulcanization accelerator), silicon Mixture 818 consisting of 10 parts by weight of a 35% water emulsion of sodium fluoride
The most part of the mixture was mixed and stirred using an oak mixer to expand the foam to four times its original size and was then discharged into the casting mold. Pour the coated polypropylene film into a casting mold,
After being allowed to stand for 30 minutes, it was steamed at 102° C. for 30 minutes to vulcanize, and then removed from the mold.

After removing from the mold, peel off the polypropylene filler, and then soak the foam in 5Q/i of caustic soda for 3 hours [! Pickled,
Calcium alginate 11 fibers and soluble starch were washed off. Thereafter, the coating tool was washed with water and dried to obtain an applicator having a liquid-impermeable layer 2 formed of a foamed film layer having micropores 3 on the coating surface as shown in FIG.

This applicator was able to apply the cosmetic without unevenness, had a good feel during application, and did not transfer the cosmetic to the inside of the application area, and was extremely good.

<Example 2> 100 g/m2 of 25% dextrin aqueous solution on release paper
200 to 300 meshes of milk casein powder was sprinkled on top at a ratio of 40 a/1 and dried.

To this sheet, 100 parts by weight of Nipol #1571 (product of Nippon Zeon Co., Ltd.) (NBR latex), Sumitex Resin M-3 [product of Sumitomo Chemical Co., Ltd.]
(Crosslinking agent) 3 parts by weight, Sumitex Accelerator
ACX (Product of Sumitomo Chemical Co., Ltd.) (Catalyst) 0
．． A spray solution consisting of 51 parts was applied by spraying at a rate of 30 g/m 2 and dried.

Next, after peeling off the release paper, 0.1% of caustic soda was added.
It was washed in a/l aqueous solution (60° C.) for 1 hour to wash off casein particles and dextrin. This was washed with water and dried to obtain a film having micropores only on the surface.

Separately, NBR latex foam with a thickness of 14111 was prepared, and on both sides of this latex foam sheet, 25 parts by weight of Hiker #1072 (product of Nippon Zeon Co., Ltd.) (NBR rubber), 75 parts by weight of toluene, and Super Beckamine 820J (large Products of Nippon Ink Chemical Industry Co., Ltd.)
An adhesive consisting of 25 parts by weight (crosslinking agent) and 0.1 parts by weight (balatoluene sulfone acid catalyst) was applied at a rate of 25 a/m2 using a wire doctor, and the film was attached to both sides of the latex foam sheet. , and dried. In this way, a liquid foundation applicator shown in FIG. 3 was obtained.

This applicator was also good as in Example 1.

<Example 3> 100 parts by weight of Ni-Ball #1571 (NBR latex manufactured by Nippon Zeon Co., Ltd.) and Sumitex Resin M-3 (Sumitomo Chemical Co., Ltd.) were applied to both sides of a 141 m thick NBR latex foam sheet (with surface layer). Products of Kogyo Co., Ltd.) (
Crosslinking agent) 3 parts by weight, Sumitex Accelerator-AC
X (a spray solution consisting of 30.5 parts by weight of a product manufactured by Sumitomo Chemical Co., Ltd. was sprayed onto a 60 mm at a rate of l/m'', and 40 g/m2 of milk casein powder of 200 to 300 mesh was sprinkled thereon, Planted, dried and vulcanized.

Next, the product thus obtained was washed for 1 hour in an aqueous solution of caustic soda O,"IQ/J at 60°C to wash off the casein particles. Then, it was washed with water and dried.

In this way, a cosmetic applicator of NBR latex foam was obtained, which was provided with a liquid-impermeable layer 2 having micropores only on the surface as shown in the first factor.

The above-mentioned manufacturing method is an example of a method for manufacturing the cosmetic applicator of the present invention, and as long as the coating surface is provided with a liquid-impermeable layer 2 and the surface of the liquid-impermeable layer 2 has micropores 3. , any manufacturing method may be used.

For example, a small amount of water-absorbing and water-retaining materials (e.g., water-absorbing and water-retaining materials such as linen, sponge, pulp, viscose rayon, hydrogel, wool, silk, etc.) is added to the liquid impermeable layer 2 liquid. It may be mixed in advance. In this way, it is possible to improve the adhesion of the liquid foundation to the applicator.

〔Effect of the invention〕

According to the cosmetic applicator of the present invention, since the applicator body is made of a flexible and breathable foam (latex foam, urethane foam, etc.), it has elasticity and provides a soft feel.

In addition, the application surface of the applicator is a liquid-impermeable layer, and the micropores are formed only on the surface of the liquid-impermeable layer and do not communicate with the inside of the applicator, so the cosmetics can be absorbed into the applicator. It does not penetrate and prevents unnecessary consumption of liquid foundation liquid.

The surface of the liquid-impermeable layer, which is the application surface, is provided with micropores formed by microparticles that can be dissolved in water or an aqueous solution, so that the cosmetics are well absorbed and there is no streaky appearance during application. Cosmetics can be applied neatly without causing unevenness or unevenness.

Also, there is no irritation when applied.

[Brief explanation of drawings]

1 to 6 are cross-sectional views showing different embodiments of the cosmetic applicator of the present invention, and FIG. 7 shows the manufacturing process of the cosmetic applicator shown in FIG. 1 or 2. It is a schematic sectional view. 1... applicator body, 2... liquid impermeable layer, 3...
Micropore, 4... Surface layer, 5... Adhesive layer, 1
0...Base material, 11...Water-soluble glue, 12...
Fine particles.

Claims (1)

[Claims] 1. The main body of the cosmetic applicator is made of a flexible, breathable foam, the application surface is a liquid-impermeable layer, and only the surface of the liquid-impermeable layer is formed of fine particles that can be dissolved in water or an aqueous solution. A cosmetic applicator for liquid foundation, characterized in that it is provided with fine pores.