JPH0121608Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a cosmetic applicator, and particularly to a cosmetic applicator for make-up cosmetics.

[Conventional technology]

Recent make-up cosmetic applicators often use foams such as rubber and urethane, and porous materials such as non-woven fabrics. The reason why porous materials are often used is that porous sheets have soft elasticity.
This is because it has a good feel when applied for cosmetics (soft to the touch) and contains good powder components, making it easy to apply cosmetics.

However, even with these porous materials,
Some people still complain of irritation such as tingling or stiffness in areas with thin skin such as the edges of the eyes and lips, and improvements have been desired.

In order to solve these problems, various attempts have been made to modify the properties of the surface of the skeleton forming the porous material.

For example, as disclosed in Japanese Utility Model Publication No. 58-12645, the applicant of the present application has formed a polyamino acid resin layer on the surface of a porous material that has a texture similar to that of human skin, thereby eliminating the tingling and stiffness described above. I tried to eliminate the irritating feeling such as feeling.

[Problem that the invention attempts to solve]

Although the above-mentioned cosmetic applicator in which a polyamino acid resin layer is formed on the surface of a porous material eliminates the feeling of irritation when applying cosmetics, a problem arises in that the durability is insufficient. In other words, the polyamino acid resin layer on the surface of the skeleton is soft when it contains water (moist), but tends to become hard when completely dry, and may peel off from the surface of the skeleton with use over time. come. In addition, in order to remove dirt adhering to the cosmetic applicator, repeated washing with detergent, hot water, etc. will speed up the removal. Therefore, there is a problem that the product can be used for a relatively short period of time without causing irritation, and an improvement has been desired.

The object of the present invention is to solve the above-mentioned problems and provide a cosmetic applicator that is highly durable, non-irritating, and has an improved usability.

[Means for Solving the Problems] The cosmetic applicator of the present invention is a cosmetic applicator made of a porous material that is breathable and flexible even in a dry state. It is characterized in that a coating layer made of a mixture of an amino acid-based polymer and a synthetic resin or a mixture of an amino acid-based polymer and rubber is formed on the surface.

〔Example〕

Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.

The cosmetic applicator of the present invention has a main part made of a porous material 1 that is breathable and flexible even in a dry state, and the surface of the main part 1 of the applicator is coated with an amino acid-based polymer and other materials. A coating layer 2 made of a mixture with a synthetic resin or a mixture of an amino acid polymer and rubber is formed. The coating layer 2 may be a foam or a regular (non-foam) film.

In the embodiment shown in FIG. 1, a foam is used as the porous material 1, and the entire surface of the skeleton 10 of the foam (i.e., the outer surface of the applicator and the skeletal surface inside the applicator) is covered with an amino acid polymer. It is coated with a coating layer 2 made of a mixture of and synthetic resin.

In the embodiment shown in FIG. 2, a nonwoven fabric is used as the porous material 1, and the entire surface of the skeleton (fiber body) 10 of this nonwoven fabric (i.e., the outer surface of the applicator and the skeletal surface inside the applicator) is made of amino acid. It is coated with a coating layer 2 consisting of a mixture of polymer and latex.

In the example shown in FIG. 3, the outer surface of an applicator made of a porous material 1 is coated with a coating layer 2 made of a mixture of an amino acid polymer and a synthetic resin (the coating 2 is a coating layer 2 made of a mixture of an amino acid polymer and a synthetic resin). It enters the interior near the outer surface, but does not penetrate deep inside). In this embodiment, the thickness of the coating layer 2 may be relatively thicker than in the embodiments of FIGS. 1 and 2. In addition, in order to improve the absorption of cosmetics, the coating layer 2
It is preferable to form the foam into an open-celled foam.

As the foam that is the porous material 1, a foam having open cells such as foamed polyurethane, foamed rubber, or foamed polyvinyl chloride may be used.

Further, as the nonwoven fabric that is the porous material 1, for example, a nonwoven fabric made of a fibrous material such as polyester, polyamide, acrylic, rayon, vinylon, polyolefin, etc. may be used.

The amino acid-based polymer in the present invention refers to a polymer containing an amino acid, and includes polyamino acids, copolymers of polyamino acids and other resins, polymers in which amino acids are added to other resins, and the like.

Polyamino acids are produced by polymerizing amino acids, and suitable are those produced by polymerizing collagen or amino acids with molecular structures similar to collagen, such as alanine, leucine, and methionine.

For example, as a polyamino acid, "Azikoat" (registered trademark: released by Ajinomoto Co., Inc.) is a polyamino acid obtained by repolymerizing the amino acid obtained by hydrolyzing protein and dissolving it in an organic solvent.
Alternatively, a polyamino acid resin such as "Himarge" (registered trademark: sold by Sumitomo Chemical Co., Ltd.: powder type or liquid type) can be used.

Copolymers of polyamino acids and other resins include, for example, copolymers of polyamino acids and polyurethane, copolymers of polyamino acids and polyesters, and grafting of polyamino acids onto polyacrylic acid acrylate copolymers. Polymers etc.

A typical example of a polymer in which an amino acid is added to another resin is, for example, one in which an amino acid is added to polyurethane.

Furthermore, examples of natural amino acid-based polymers include water-soluble proteins such as milk casein, soybean casein, egg white, and gelatin.

The synthetic resin that forms the coating layer 2 together with the amino acid polymer is preferably one that is flexible even in a dry state, and includes acrylic resin, polyurethane resin,
Suitable examples include polyester resins, polyamide resins, polyolefin resins, vinyl resins, silicone resins, and fluorine resins. In particular, for summer cosmetic applicators, it is recommended to use highly hydrophilic polyamino acids or hydrophilic polyurethane resins, or add hydrophilic cationic activators to further increase water absorption and water retention. is preferred.

Further, the rubber forming the coating layer 2 together with the amino acid polymer may be natural rubber or synthetic rubber, such as NBR and SBR. in this case,
It is preferable to use rubber as latex and mix the amino acid-based polymer therein.

The mixing ratio of the amino acid polymer and the synthetic resin or rubber may be arbitrarily selected in a weight ratio of 1:10 to 10:1, preferably 3:7 to 7:3.
The mixing ratio may be changed appropriately depending on the synthetic resin or rubber used.

To form a film on the surface of the porous material 1, a mixture of the amino acid polymer and the synthetic resin or rubber is made into a liquid, and this treatment liquid is subjected to an appropriate method such as dipping, spray coating, or roll coating. Therefore, by adhering it to a porous material, a film can be formed.

For example, a mixture of a commercially available polyamino acid resin liquid as described above and another resin in the form of a solution can be used as the treatment liquid. Alternatively, a water-soluble protein is mixed with a rubber latex (synthetic or natural) or a synthetic resin emulsion to form a treatment liquid, which is then attached to a porous material to form a film. In this case, a crosslinking agent (for example, melamine formalin resin, urea formalin resin, resin containing a water-soluble blocked isocyanate group, etc.) may be added in advance to the treatment liquid to insolubilize the protein.

In the embodiment shown in FIGS. 1 and 2, the coating layer 2 is formed by dipping. First, the porous material 1 is immersed in a treatment liquid made of a mixture of an amino acid polymer and a synthetic resin. In this way, since the porous material 1 is a breathable material (open-cell foam or nonwoven fabric),
The treatment liquid permeates into the inside of the porous material 1. After immersion, the water and liquid are drained and a drying process is performed, whereby the synthetic resin component is firmly fixed to the surface of the skeleton 10 of the porous material 1, and the amino acid-based polymer 3 is contained in the synthetic resin component. are also in a dispersed and fixed state.

In this way, when the immersion treatment is performed, the porous material 1
Since the treatment liquid permeates into the interior of the cosmetic applicator, the entire surface of the skeleton 10 forming the porous material 1 is covered with the coating layer 2.

When forming the coating layer 2 into a foam, air is blown into the treatment liquid using an oak mixer or the like, and the treatment liquid is stirred to have fine air bubbles mixed therein. The method forms a foamed coating layer.

Further, as another method of forming the coating layer 2 into a foam, a chemical that generates gas when heated may be appropriately mixed into the processing liquid in advance.

When the film is formed by roll coating or spray coating, the film layer 2 is formed only near the surface of the cosmetic applicator, as shown in the embodiment of FIG.

[Effect of idea]

Since the surface of the porous material of the cosmetic applicator of the present invention is coated with a film layer, it does not give any irritating sensations such as tingling or stiffness to the skin during use.
Moreover, since the coating layer contains the amino acid polymer, it provides a good feeling of use similar to that of the skin.

According to the present invention, the amino acid polymer forms a coating layer together with the synthetic resin or rubber, and this synthetic resin or rubber adheres well to the skeleton of the porous material, fixing the skeleton and the amino acid polymer. It functions as a bonding agent. Therefore, even if the cosmetic applicator of the present invention is used for a long period of time, the coating layer will not peel off.

In addition, the cosmetic applicator of this invention does not have a hard coating layer even in dry conditions, so it is suitable not only for applying water-based cosmetics but also for liquid, cream, and powder type cosmetics. . In particular, since an amino acid-based polymer is present in the film layer, this is especially true when applying cosmetics to the applicator after moistening the applicator with water, or when using makeup that contains moisture such as liquid or cream type cosmetics. When applying the material, a softer touch can be used.

Further, in the present invention, since the coating is formed from a mixture of amino acid polymer and synthetic resin or rubber, it is easier to form the coating layer into a foam. The foam coating layer is more flexible when touching the skin compared to conventional products of this type.
Usability can be significantly improved.

In addition, if a hydrophilic polyurethane resin is used as the synthetic resin to be mixed with the amino acid-based polymer or a hydrophilic cationic activator is added to the treatment liquid, water absorption and water retention properties will further increase, and when applying cosmetics. Provides a refreshing feeling. Therefore, it is especially important to form such a film on cosmetic applicators for summer use that use water, or on items that do not themselves have water absorption properties, such as rubber latex sponge cosmetic applicators. preferable.

[Brief explanation of the drawing]

FIG. 1 is a partially enlarged sectional view of one embodiment of the cosmetic applicator of the present invention, FIG. 2 is a partially enlarged sectional view of another embodiment, and FIG. 3 is a sectional view of still another embodiment. 1... Porous material, 10... Skeleton, 2... Film layer.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A cosmetic applicator made of a porous material that is breathable and flexible even in a dry state,
A cosmetic applicator characterized in that a coating layer made of a mixture of an amino acid polymer and a synthetic resin or a mixture of an amino acid polymer and rubber is formed on the surface of the porous material. 2. The cosmetic applicator according to claim 1, wherein the coating layer covers the entire surface of the skeleton forming the porous material. 3. The cosmetic applicator according to claim 1 or 2, wherein the coating layer covers the entire surface of the skeleton forming the porous material in the form of a foam layer.