JPS6312608B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to make-up cosmetics, and particularly to an applicator for liquid foundation.

[Conventional technology]

Traditionally, liquid foundation applicators have been made of urethane resin foam blocks, rubber,
Latex foam blocks have been widely used.

[Problem that the invention seeks to solve]

However, although these applicators have the advantage of being highly elastic, when applying cosmetics, the cosmetics tend to get inside the applicator and end up wasting more than the amount that can be effectively used. There is a problem.

This is due to the phenomenon that the cosmetic applied to the applicator permeates into the interior of the foam through the pores of the foam due to the spreading action during makeup. Furthermore, due to this phenomenon, it becomes impossible to apply multiple coats (thick coats) during use.
There is also the problem that the cosmetic effect cannot be fully satisfied.

In order to prevent cosmetics from penetrating into the applicator, it was first discovered in the 1970s that a sheet-like hot melt adhesive layer or synthetic resin coating was formed on the surface of the applicator.
This method is disclosed in Publication No. 88570 and Japanese Utility Model Application No. 53-146583. Although penetration of cosmetics can be prevented to some extent by the methods disclosed in these publications, the following problems are not solved.

Generally, the surface of a cosmetic applicator made of a foam block is extremely rough and uneven, and streak-like unevenness is likely to occur during application. The reason why the surface is extremely rough and uneven is that polishing pressure cannot be applied uniformly when polishing the foam block, and in order to obtain elasticity, a foam with a high expansion ratio and large cells must be used. This is due to the fact that they cannot afford it.

However, even if a sheet-like hot melt adhesive is welded to the surface of the applicator or a synthetic resin coating layer is formed as disclosed in both of the above-mentioned publications, unevenness still occurs due to the air bubbles in the foam block. This results in uneven coating. On the other hand, if
It is not preferable to make the synthetic resin layer thick enough to eliminate unevenness on the surface of the applicator because the elasticity and flexibility of the foam will be impaired.

In order to improve the feel of the surface of the applicator, some of these foam blocks are simply flocked with pile (short fibers) on the surface, but in addition to the above-mentioned problems, the irregularities on the surface of the foam remain on the flocked surface of flocked products. In addition, these unevenness causes unevenness in the adhesive, causing shedding of the pile and disordered flocking, which reduces the feeling of use when applying makeup.
There is a problem in that the cosmetics are applied unevenly.
This problem similarly occurs in the cosmetic puffs described in the aforementioned Japanese Utility Model Application Publication No. 50-88570 and Japanese Utility Model Application Publication No. 53-146483.

In addition, normally when polyurethane foam is simply flocked, when two sheets are punched together, the upper and lower edges of the punched portion will stick to each other due to the frictional heat during punching, resulting in the formation of a rounded edge. , no special finishing process is required. However, in 1973-
In the puff disclosed in Publication No. 146483, one side of the foam is coated with a polyurethane resin, then coated with an acrylic resin, and then the hair is flocked. If two sheets are overlapped and punched so that they are on the outside, a problem arises in that the upper and lower edges of the punched portion do not stick together.

[Purpose of the invention]

The purpose of the present invention is to prevent ineffective consumption of cosmetics during application, to enable layering (thick coating), and to provide a flat, uniformly dense pile or powder surface that improves the feeling of use. To provide a cosmetic applicator which has good properties and can uniformly apply cosmetics.

[Process leading to the present invention]

Initially, in order to prevent the ineffective consumption of cosmetics, the inventor applied the following methods to the surface of the foam, as disclosed in Japanese Patent Application Laid-Open No. 118557/1983 (which the inventor previously filed).
After forming the synthetic resin coating layer, several attempts were made to place the implant. However, although it is possible to prevent cosmetics from permeating into the foam, it is not possible to completely uniformize the distribution of the planted piles and powder particles.

This was caused by the fact that the variation in the pores on the surface of the foam was too large, and even if a synthetic resin film was simply formed, the shapes of the concave and convex parts of the foam would be faithfully reproduced on the surface of the implant. .

On the other hand, a foam with a small foaming ratio, that is, a foam with small bubbles, can solve this problem, but on the other hand, it lacks elasticity and essentially loses its function as a makeup application tool, making it unable to achieve its original purpose. Nakatsuta.

[Means for solving problems]

The present invention is a cosmetic applicator having a foamed polyurethane material as a base, which comprises a melting layer formed by melting the surface of the foaming polyurethane material, a synthetic resin layer formed on the upper surface of the melting layer, and a synthetic resin layer formed on the upper surface of the melting layer. The above-mentioned problems have been solved by a cosmetic applicator characterized by having an adhesive layer formed on the upper surface of a synthetic resin layer and an implant attached to the adhesive layer.

[Effect]

According to the present invention, the surface of the foam serving as the base of the cosmetic applicator is melted by heat treatment to form a molten layer. This molten layer melts the convex portions on the surface of the foam and closes or reduces the pores, making the surface of the foam flat and uniform. Therefore, the formation of the synthetic resin layer and the planting of piles etc. can be performed uniformly on the molten layer. Furthermore, the molten layer and the synthetic resin layer formed thereon can prevent the cosmetic from penetrating into the applicator.

〔Example〕

Hereinafter, the present invention will be explained in detail based on the drawings.

FIG. 1 is a cross-sectional view of the raw material of urethane foam 1. FIG.

The urethane foam 1 used in the present invention is a polyurethane resin foam obtained from the reaction of polyester-isocyanate and polyether-isocyanate.

As shown in the figure, the surface of the urethane foam 1 always has large convex portions 2 even after cutting. The convex portions 2 are the skeleton of the foam and make the surface of the urethane foam 1 rough, and are a factor closely related to the post-treatment process.

Next, referring to FIG. 2, the convex portions 2, which are the foam skeletons on the surface of the urethane foam 1 shown in FIG. It is something that

The molten layer 3 is formed by heat-treating the surface of the urethane foam 1.

Specific methods of heat treatment include flame treatment using a gas burner, press treatment using a hot plate or hot roll, and hot wire treatment. In particular, the flame treatment can most effectively melt and flatten the surface convex portions 2 of the urethane foam 1.

As a matter of course, the heating temperature must be higher than the melting point of the raw urethane foam. If the treatment is carried out at an extremely high temperature for a long time, the melting will progress too much and the molten layer 3 will become thicker and lose its flexibility, which is not preferable.

Flame treatment is preferable because the convex portions 2 on the surface of the foam come into contact with the flame first, so the flame treatment partially
This is because the urethane foam is melted first, and the molten layer 3 can be formed without substantially affecting the flexibility of the raw urethane foam 1.

The surface of the urethane foam 1 is flattened by the heat treatment. This is because the resin forming the surface convex portions 2 is melted by heat and fills the foamed pores on the surface of the foamed urethane 1. As a result, the surface of the foam 1 is formed to have the same effect as if it were molded with a small expansion ratio.

This has an extremely favorable effect on the formation of the synthetic resin layer in the subsequent process and the stabilization of the implantation process.

Next, FIG. 3 shows a synthetic resin layer 4 formed on the molten layer. This synthetic resin layer 4 is coated with an emulsion type or solvent type coating liquid obtained from acrylic, polyurethane, polyamide, polyester, or polyolefin synthetic resin by spray coating, roll coating, or knife coating, and then heated. It is formed by drying to form a film.

Further, at this time, the synthetic resin layer 4 may be formed as a thin foam layer using these resins.

Other methods for forming the synthetic resin layer 4 include scattering fine powder of the synthetic resin on the surface of the molten layer 3 and then heating the surface with an infrared lamp, or applying a mold release process using Teflon resin. It is also possible to perform press processing using heated rolls or hot plates.

The synthetic resin layer 4 formed on the surface of the molten layer 3 prevents the cosmetic from penetrating into the urethane foam 1.

Moreover, since the molten layer 3 has a flattened surface, the synthetic resin layer 4 formed on the molten layer 3 also becomes an extremely flat layer.

Next, FIGS. 4, 5, and 6 will be explained.

4 to 6 show the synthetic resin layer 4, respectively.
After forming the adhesive layer 5 on top, a pile 6 is planted in Fig. 4, a mixture of powder and granular material 7 and pile 6 is planted in Fig. 5, and powder and granular material 7 is planted in Fig. 6. It is.

The adhesive layer 5 is preferably made of acrylic ester adhesive, rubber adhesive, polyester adhesive, etc.
It can be applied by spray coating, roll coating, or knife coating.

The pile material 6 may be made of fibers such as rayon, polyester, acrylic, polyamide, vinylon, cotton, etc., and its thickness may be appropriately selected depending on the texture and type of cosmetic.

The granular material 7 includes water-absorbing sponge powder, carboxymethylcellulose-based, starch-polyacrylic-based, polyvinyl-based, polyacrylic acid-based, alginate-based granular material, calcium carbonate, anhydrous silicic acid powder, etc. The material may be selected in consideration of water absorption and compatibility with cosmetics.

The pile 6 has the function of holding the liquid foundation between the fibers, and also improves the touch (feel) to the skin. The granular material 7 improves affinity with cosmetics, enhances the ability of the applicator to retain the cosmetics, and has a pine surge effect on the skin.

In these implants 6 and 7, since the surface of the urethane foam 1 serving as the implant base material is formed of a flat fused layer 3, the synthetic resin layer 4 formed thereon is also formed flat. As a result, the pile 6 and the powder 7, which are the implanted bodies adhered to the synthetic resin layer 4, also become flat, uniform, and dense.

〔Effect of the invention〕

According to the present invention, since the surface of the foamed polyurethane material is melted, the melted surface convex portions fill the foamed cells, and the surface becomes flat and in a state similar to the surface of a foam with a small expansion ratio. Therefore, the subsequent formation and implantation of the synthetic resin layer can be performed uniformly.

Further, according to the cosmetic applicator of the present invention, the surface of the implant made of pile or powder is flat, uniform, and dense, and therefore feels good in use.
Moreover, the cosmetic can be applied evenly.

According to the cosmetic applicator of the present invention, ineffective consumption of cosmetics during application can be prevented, and multiple applications (thick applications) can be performed. In addition, when the foam obtained by the heat treatment of the present invention is punched by stacking two sheets with the implanted body facing outward, the upper and lower edges of the punched part will be flattened, so no special finishing is required. It is.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view of the raw material urethane foam, Figure 2 is a cross-sectional view of the urethane foam with a molten layer formed on its surface, and Figure 3 is a cross-sectional view of the urethane foam with a synthetic resin layer formed on the surface of the molten layer. , FIG. 4 is a cross-sectional view of the applicator of the present invention in which the implanted body is a pile, FIG. 5 is a cross-sectional view of the applicator of the present invention in which the implanted body is a powder, and FIG. 6 is the implanted body. FIG. 2 is a cross-sectional view of the applicator of the present invention, which is a pile and powder. 1...Urethane foam, 2...Surface convexity, 3...
Molten layer, 4...Synthetic resin layer, 5...Adhesive layer, 6
...Pile, 7...Powder material.

Claims (1)

[Scope of Claims] 1. A cosmetic applicator having a foamed polyurethane material as a base, comprising: a molten layer formed by melting the surface of the foamed polyurethane material; a synthetic resin layer formed on the upper surface of the molten layer; A cosmetic applicator comprising: an adhesive layer formed on the upper surface of the synthetic resin layer; and an implant attached to the adhesive layer. 2. The cosmetic applicator according to claim 1, wherein the implant is a pile. 3. The cosmetic applicator according to claim 1, wherein the implanted body is a powder or granule. 4. The cosmetic applicator according to claim 1, wherein the implanted body is a pile and powder.