JPH0516976Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a cosmetic applicator, particularly a cosmetic applicator suitable for applying powder-solid makeup cosmetics that can be used with or without water. It is. That is, the present invention relates to a cosmetic applicator that is suitable for applying cosmetics when the applicator is wet with water, and also suitable for applying cosmetics even when the applicator is dry.

[Conventional technology]

Make-up cosmetics in the form of solid powders have been widely used. These powdered solid cosmetics include those that are applied after dissolving the cosmetic in water, those that are applied as is, and those that can be used with or without water. In recent years, dual-use types are particularly preferred by consumers and are often used.

When using powdered solid cosmetics, in order to achieve a cooling sensation during application during the hot summer months, it is recommended to first wet the applicator with water, dissolve the cosmetics, and then apply it to the skin to obtain a cooling sensation. Liked. Furthermore, during times other than summer, it is preferred to apply cosmetics directly to the skin using an applicator.

As materials for applicators for these cosmetics, sponges, polyvinyl alcohol foams, polyurethane foams, rubber foams, and the like are used.

Looking at the relationship between powdered solid cosmetics and applicators, sponges and polyvinyl foams are preferably used as applicators that are wetted with water. However, although sponges and polyvinyl foams are flexible and soft to the touch when wet, they become hard when dry and cannot function as applicators.

On the other hand, polyurethane foams and rubber foams are soft to the touch when dry, but have a problem in that they do not provide a cooling sensation due to their low water absorption when wet.

Therefore, there is a need for a convenient applicator for powdered solid cosmetics that can be used both with and without water, and various studies have been conducted in recent years.

For example, in Japanese Patent Application Laid-open No. 61-73608, water absorption,
A pub, etc., in which the entire outer periphery of a nonwoven fabric having preservability is covered with a soft foam having a higher water absorbency than the nonwoven fabric is disclosed. This puff is designed to have flexibility with the foam on the surface and a water-retaining effect with the non-woven fabric inside, so that during use, the puff gradually oozes from the non-woven fabric inside to the foam on the surface.

[The problem that the idea aims to solve]

When I actually used the product disclosed in JP-A No. 61-73608, I found that the cooling sensation during use was not much different from that of a normal sponge wet with water, but because there is a nonwoven fabric inside the foam, When applying, the non-woven fabric feels hard on the fingertips and skin, and it lacks flexibility as an applicator.
Usability becomes worse. In order to achieve flexibility, the density of the nonwoven fabric must be reduced, and if the density is reduced, water retention is lost, and this contradictory characteristic makes it impossible to produce a good applicator.

In addition, since the product disclosed in JP-A-61-73608 has a shape in which nonwoven fabric is filled inside the foam, high-speed production such as punching is not possible, and it is necessary to bond each piece using adhesive. However, it is necessary to immerse the nonwoven fabric in a urethane foaming solution and foam it one by one, resulting in poor production efficiency.

[Purpose of invention]

The purpose of the present invention is to provide a cosmetic applicator that is flexible and has a good feel when used with or without water, and that also has a cosmetic applicator that is flexible and feels good when used with or without water. To provide a cosmetic applicator that allows a certain amount of moisture to continue to ooze out on the surface for a long time after squeezing, gives a continuous feeling of cooling until the makeup is finished, and can be applied uniformly. .

[Means to solve the problem]

The present invention comprises a first flexible open-cell foam having water repellency, and a second flexible open-cell foam having water absorption properties provided on the surface of the first foam. The above-mentioned problems have been solved by a cosmetic applicator characterized by the following.

In particular, the second foam having water absorption properties is applied to the foam skeleton itself and to the coating layer covering the foam skeleton.
Preferably, the material has micropores formed by elution of microparticles that can be dissolved in water or an aqueous solution.

[Effect]

In the cosmetic applicator of the present invention, a first foam body made of a water-repellent foam skeleton is present inside the applicator. When this first foam gets wet with water, water is retained in the cells (pores) formed between the foam skeletons, but since the foam skeleton itself has water repellency, the first foam In the body, water can move freely between cells even with slight external pressure.

Since the core of the applicator is made of the first foam, it is flexible and highly elastic, and its state can be freely changed depending on the application.

Furthermore, in the cosmetic applicator of the present invention, the second foam serves as the application part during application. This second foam has a water-absorbing surface on its foam skeleton, so when it is used wet with water, if the water balance decreases on the surface of the applicator when applying cosmetics, the first foam will immediately absorb water. It has a function of pumping up the water retained between the cells of the second foam, supplying it to the cosmetic application surface of the second foam, and causing it to ooze out.

If the moisture present between the foam skeletons (between the cells) of the foam on the surface of the cosmetic application is used alone, as with conventional applicators, a cooling sensation may occur temporarily (for a few seconds) during application, but it will continue to cool down. I couldn't feel the cold for a long time. However, in the cosmetic applicator of the present invention, since the second foam draws up moisture from the first foam,
Provides a lasting cooling sensation.

That is, according to the present invention, by combining a water-repellent foam and a water-absorbing foam, it is possible to obtain a cooling sensation while applying makeup.

In particular, in structures where the skeletal surface causes capillarity, this improves the volatility of water.
The resulting endothermic effect provides a refreshing feeling.

Since the present invention has such a structure, the water retained between the cells of the first foam inside is transmitted through the skeletal surface of the second foam provided on the surface, and oozes out evenly. This results in an applicator with a long cooling period.

Furthermore, even in the case of no water, the flexibility and elasticity characteristic of the foam are not impaired, and the foam has a good feeling of use.

〔Example〕

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

FIG. 1 is a sectional view of an embodiment of the cosmetic applicator of the present invention.

In this example, reference numeral 1 denotes a flexible first open-cell foam having water repellency. Reference numeral 2 indicates a flexible second open-cell foam having water absorption properties. With the water-repellent first foam 1 sandwiched in the middle, two water-absorbing second foams 2 are adhered to the first foam 1 with an adhesive 3, and the second foam The two joining edges are joined by punching.

The flexible first open-cell foam 1 having water repellency may be made of a material that itself has water repellency, such as silicone rubber foam or fluorine rubber foam. . Alternatively, a water-repellent coating layer may be formed on the surface of a foam skeleton such as polyurethane foam or rubber foam. This water-repellent coating layer may be formed by coating with a coating liquid made of a resin that itself is water-repellent, such as a silicone resin or a fluororesin. Alternatively, a water-repellent coating liquid made by blending a water-repellent component such as silicone oil, wax, or paraffin with synthetic resin such as acrylic, polyester, polyurethane, polyamide, or polyolefin resin or rubber latex may be coated. , a water-repellent coating layer may be formed.

In addition, the degree of water repellency of the first foam 1 is JIS-
It is preferable that the water repellency test method according to L-1042 is 80 points or more.

In any case, it is important that the skeletal surface of the first foam has water repellency and that the water retained between the skeletal structures (between cells) can move freely even when subjected to slight external pressure. Therefore, the foam structure is an open cell structure. Further, the foaming ratio is about 2 to 30 times, preferably about 5 to 15 times, and can be freely selected in relation to the stiffness of the applicator, that is, the usability.

The water-absorbing foam 2 includes water-absorbing fiber powder such as cotton, hemp, rayon, vinylon, etc., sponge powder, pulp powder, cellulose derivative, acrylic-starch compound, etc. in the foaming raw material. It is obtained by mixing about 0.5% to 7% of materials and foaming them.

The foam obtained by the above method exhibits water absorbency due to the water absorbing material on the surface of the foam skeleton, so the first
The water retained in the foam 1 can be quickly transferred to the application surface of the cosmetic applicator.

Further, the water-absorbing foam 2 may be manufactured as follows. That is, microparticles that can be dissolved in water or an aqueous solution, such as starch, dextrin, higher alcohol, fatty acid, calcium carbonate, etc., are mixed in advance into a foaming raw material such as polyurethane or rubber latex that forms the foam skeleton, and foam molding is performed. . Thereafter, the fine particles contained in the foam skeleton are eluted with water or an aqueous solution (alkaline or acidic) to expose numerous fine pores on the surface of the foam skeleton. The foam produced in this way has extremely good water absorbency.

This is because micropores are formed on the skeletal surface that constitutes the foam, and water passes through the micropores due to capillary action, allowing moisture to be easily transferred from the first foam 1 to the application surface of the cosmetic applicator.

Furthermore, the water-absorbing foam can also be formed by the following method.

That is, a foam such as polyurethane or rubber latex is formed in advance, and a water-absorbing coating layer is provided on the surface of the foam skeleton of the foam. This coating layer facilitates the transfer of moisture from the first foam 1 to the application surface of the cosmetic applicator.

The coating layer may be formed on the skeletal surface of the foam using a resin liquid that itself has water absorption properties, such as a polyurethane resin liquid or a polyamino acid resin liquid, which has water absorption and hydrophilic properties. Alternatively, water-absorbing materials such as those described above (for example, cotton powder, hemp powder, pulp powder, cellulose derivatives,
Mix acrylic-starch compounds, granules of water-absorbing materials such as rayon, vinylon, etc.) and water-soluble fine particles to form a coating liquid, and coat the base foam to create a water-absorbent coating on the skeletal surface of the foam. A layer may be formed.

Alternatively, the base foam is immersed in a liquid mixture of a synthetic resin such as polyamide, polyester, polyolefin, acrylic, vinyl, etc. and the water-absorbing material mentioned above, squeezed, and dried to absorb water on the skeletal surface of the foam. A coating layer containing a material may be formed.

Alternatively, the above-mentioned water-soluble fine particles may be mixed with a synthetic resin liquid such as polyamide, polyester, polyolefin, acrylic, vinyl, etc., and coated on the base foam as a coating liquid to form a coating layer on the skeletal surface of the foam. may be formed, and then the fine particles contained in the coating layer may be eluted with water or an aqueous solution to expose countless fine pores in the coating layer, thereby imparting water absorption properties.

When forming the coating layer as described above, if the coating layer is made into a foamed state (foamed layer) by blowing air into the coating liquid or using a foaming agent, the water absorption effect will be enhanced, and the water absorption effect will be increased. Moisture can be more easily transferred to the surface of the foam to which the cosmetic is applied.

No matter which method is used to manufacture the second foam, the skeletal surface of the second foam 2 is water-absorbing, so the moisture balance on the surface of the applicator when applying cosmetics is difficult. When the amount decreases, the water retained between the cells of the first foam 1 is immediately drawn up and supplied to the cosmetic application surface of the second foam 2. Therefore, it is possible to obtain a sustained cooling sensation, not simply due to the effect of moisture existing between the foam skeletons (between cells) of the second foam body 2.

Note that the foaming ratio of the second foam 2 is from 1x to
It is 30 times, preferably about 2 times to 8 times, and in relation to the stiffness as an applicator, that is, the usability,
You can choose freely.

Further, it is preferable that the second foam 2 prepared as described above has such water absorbency that when 1 c.c. of water is dropped, the suction time is about 10 seconds or less. .

In order to join the first foam 1 and the second foam 2, first mold the first foam 1, then mold the second foam 1.
The foam 2 may be integrally formed by molding the foam 2 on the surface thereof.

As another joining method, as shown in FIG.
An epoxy-based, urethane-based, polyester-based, polyamide-based, rubber-based adhesive or the like may be applied and bonded by the adhesive layers 3, 3'. However, in this case, the adhesive layers 3 and 3' must be bonded in a discontinuous state (with holes). If the adhesive layers 3 and 3' are completely continuous (no holes), the water passage function will be lost and water will not be able to migrate from the first foam to the second foam. Because it will disappear.

FIG. 2 is a sectional view showing another embodiment of the cosmetic applicator of the present invention.

The cosmetic applicator of this example is made as follows.

First, on one side of the first foam 1, an impermeable sheet 5 made of polyethylene, polypropylene, polyester, polyurethane, etc. is used with an adhesive or
Or heat treatment without using adhesive,
Laminate.

Then, on the opposite side of the first foam 1, a first
After laminating the second foam 2 in the same way as the applicator shown in the figure, it is squeezed, and a top plate 4 coated with hot melt adhesive 6 is pasted on the back side of the synthetic resin sheet to make it into a puff shape. Finish.

The cosmetic applicator of this embodiment also has the same effect as that shown in FIG.

In addition, when laminating the 1st foam 1 and the 2nd foam 2, it is also possible to multilayer by a desired combination of foams with different expansion ratios. For example, if the foaming ratio of the first water repellent material 1 having water repellency is relatively large, and the second foam material 2 is made into two layers, the foaming ratio of the surface to be applied with cosmetics is set to the first foam material 1. It can be made smaller than the one in contact with it.

<Example 1> 3 mm thick polyurethane foam sheet Super Flex 200 (polyether polyurethane emulsion) [Daiichi Kogyo Seiyaku Co., Ltd.] 60 parts Sumitekus Resin M-3 (crosslinked) agent) [Sumitomo Chemical Co., Ltd.] Part 3 = Sumitex Accelerator ACX (catalyst)
[Sumitomo Chemical Co., Ltd.] Immerse in an impregnating solution consisting of 0.5 parts = 17 parts of starch = 40 parts of water, dry and heat to crosslink the polyurethane resin, then wash away the starch with warm water at 60°C and absorb water. Got a sex sheet. When 1 c.c. of water was dropped on the surface of this water-absorbing sheet, it took about 5 seconds to absorb the water.

On the other hand, HZ form [Bridgestone Corporation]
Prepare a 6mm sheet of Scotchigard FC-453 (fluorine-based water repellent)
[Sumitomo 3M Co., Ltd.] 6 parts = Sumitex Resin M-3 (crosslinking agent) [Sumitomo Chemical Co., Ltd.] 2.5 parts = Sumitex Accelerator ACX (catalyst)
[Sumitomo Chemical Co., Ltd.] 0.5 parts = It was immersed in an impregnating solution consisting of 91 parts of water, dried, and heated to obtain a water-repellent sheet. This sheet received a score of 80 or higher in a water repellency test method based on JIS-L-1042.

Next, a water-repellent sheet is sandwiched between the two water-absorbent sheets, and a bonded non-woven fabric type melt-adhesive sheet is placed between the water-absorbent sheet and the water-repellent sheet.
Insert NS-0030 [Kureha Textile Industry Co., Ltd.]
A sheet with a three-layer structure was obtained by sandwiching it between iron plates at 140°C and applying pressure. This three-layered sheet was punched and formed into a water-based cosmetic puff having the cross-sectional structure shown in FIG.

At a relative temperature of 65% at 27°C and a wind speed of 1 m/sec, the surface temperature of this puff was approximately 20°C, giving it an extremely refreshing sensation.

<Example 2> A 6 mm sheet of HZ Foam [Bridgestone Co., Ltd.], which is a polyurethane foam sheet, was prepared as follows: Super Flex 200 [Daiichi Kogyo Seiyaku Co., Ltd.] 60 parts Sumitekus Resin M-3 [Sumitomo Chemical Co., Ltd.] Kogyo Co., Ltd.] 2.5 parts Sumitex Accelerator ACX [Sumitomo Chemical Co., Ltd.] 0.5 parts 30% aqueous solution of ammonium stearate 8 parts Starch 17 parts Water 40 parts Immersed in an impregnating solution and dried. After heating to crosslink the polyurethane resin, starch and ammonium stearate were washed away with a 0.1% aqueous soda ash solution at 80°C to obtain a water absorbent sheet. When 1 c.c. of water was dropped on the surface of this water-absorbing sheet, the absorption time was about 3 seconds or less.

On the other hand, a 5 mm thick sheet of NBR foam rubber was used as follows: Scotch Guard FC-453 [Sumitomo 3M Co., Ltd., Part 6] Fobotex FC (paraffin-modified methylol melamine resin) [Japan Ciba Geigy Co., Ltd.]
A water-repellent sheet was obtained by immersing the sheet in an impregnating solution consisting of 2 parts of acetic acid and 92 parts of water, drying, and heating. The obtained sheet is JIS-L-1042
It achieved a water repellency score of 80 points or higher using a water repellency test method similar to the above.

Next, a water repellent sheet was sandwiched between the two water absorbent sheets, and a 30 micron thick polyester melt-adhesive sheet TP-101 [Nippon Matai Co., Ltd.] was placed between the water absorbent sheet and the water repellent sheet. It was inserted and pressed between aluminum plates at 140°C to obtain a sheet with a three-layer structure. This three-layered sheet was used as a puff material for water-based cosmetics.

This puff material is 1 m/m at 25°C and 65% relative humidity.
Under the wind speed of seconds, its surface temperature is cooled to about
The temperature was 18°C, which had an extremely large cooling effect, and when used in the form of a puff, it had an excellent cooling sensation.

<Example 3> On a sheet of NBR latex foam 8 mm thick: Super Flex 200 [Daiichi Kogyo Seiyaku Co., Ltd.] 100 parts Ammonium oleate 6 parts Starch 17 parts Polyvinyl alcohol (20% aqueous solution) 8 parts = Diatomaceous earth 5 parts = Sumitex Resin M-3 [Sumitomo Chemical Co., Ltd.] 5 parts = Sumitex Accelerator ACX [Sumitomo Chemical Co., Ltd.] 0.5 parts = Water A mixed solution consisting of 10 parts is oaked. Apply the coating liquid to a thickness of 1.5 mm while foaming it 4 times with a mixer.
After drying and heating to crosslink the crosslinking agent, the starch was washed away with a 60°C caustic soda 0.3g/aqueous solution to obtain a sheet with a water absorbent surface. When 1 c.c. of water was dropped on the surface of this water-absorbing sheet, it took about 3 seconds to absorb the water.

On the other hand, a 6 mm sheet of polyurethane foam was immersed in a water-repellent impregnating solution consisting of 3 parts of Scotchigard FC-453 [Sumitomo 3M Ltd.], 2 parts of Fobotex FC [Nippon Ciba Geigy Ltd.], 0.5 parts of acetic acid, and 94.5 parts of water. After that, it was dried and heated to obtain a water-repellent sheet. This sheet is JIS-L
It had water repellency of 80 points or more in the water repellency test method according to -1042.

A water-repellent sheet is sandwiched between two water-absorbent sheets,
TP of film type 30 micron thick melt adhesive sheet between water absorbent sheet and water repellent sheet
-101 [Nippon Matai Co., Ltd.] was inserted and pressed between iron plates at 140°C to obtain a sheet with a three-layer structure. This sheet was used as a puff material for water-based cosmetics. The surface temperature of this puff was approximately 20°C at 27°C, 65% relative humidity, and a wind speed of 1 m/sec, making it possible to produce a puff with an extremely refreshing sensation.

<Example 4> On a sheet of NBR latex foam with a thickness of 8 mm Elastron W-11 (water-absorbing resin emulsion) [Daiichi Kogyo Seiyaku Co., Ltd.] 15 parts Polyvinyl alcohol (20% aqueous solution) 20 parts The polyurethane resin was immersed in an impregnating solution consisting of 2 parts of nonionic activator, 5 parts of diatomaceous earth, and 40 parts of water, dried, and heated to crosslink the polyurethane resin, and then washed with hot water at 60°C to obtain a water-absorbing sheet. This water absorbent sheet had almost the same water absorption rate as Example 3.

On the other hand, a 5 mm thick sheet of NBR latex foam was immersed in an impregnating solution consisting of 3 parts of Scotchigard FC-208 [Sumitomo 3M Ltd.], 3 parts of Fobotex FC [Nippon Ciba Geigy Ltd.] and 94 parts of water, and dried. , and heated to obtain a water-repellent sheet. The obtained sheet is JIS-L-
The water repellency test method according to 1042 gave a score of 80 or higher.

This 6 mm sheet of water-repellent NBR foam is sandwiched between the two water-absorbing sheets, and a film-type melt-adhesive sheet is placed between them.
-101 [Nippon Matai Co., Ltd.] is inserted and heated to 140℃.
A sheet with a three-layer structure was obtained by sandwiching it between two iron plates and applying pressure. This sheet was used as a puff material for water-based cosmetics.

When this puff material is wetted with water, its surface temperature becomes approximately 20°C at 27°C, 65% relative humidity, and a wind speed of 1 m/s, making it possible to produce a puff with an extremely refreshing feeling. .

<Example 5> On a sheet of NBR latex foam with a thickness of 8 mm Azikoat A coating solution consisting of 1 part of the agent was applied to a thickness of 0.8 mm, immersed in water, dried, and washed with warm water at 60°C to obtain a sheet with a water-absorbing surface. When 1 c.c. of water was dropped on the surface of this water-absorbing sheet, it took about 3 seconds to absorb the water.

On the other hand, a sheet of NBR latex foam was immersed in a water-repellent impregnating solution consisting of 3 parts of Scotchigard FC-453 [Sumitomo 3M Ltd.], 2 parts of Fobotex FC [Japan Ciba Geigy Ltd.], 0.5 parts of acetic acid, and 94.5 parts of water. Thereafter, it was dried and heated to obtain a water-repellent sheet. This sheet is JIS-L-
It had water repellency of 80 points or higher in the water repellency test method based on 1042.

Sandwich the above two water-repellent sheets between two water-absorbing sheets, and insert a film type 30 micron thick melt-adhesive sheet TP-101 [Nippon Matai Co., Ltd.] between them. A sheet with a four-layer structure was obtained by sandwiching it between iron plates at 140°C and applying pressure. This sheet was used as a puff material for water-based cosmetics. This puff is at 27℃
At a relative humidity of 65% and a wind speed of 1 m/s, the surface temperature was approximately 20°C, giving it an extremely cool feeling.

[Effect of idea]

According to the cosmetic applicator of the present invention, a water-retaining function is imparted to the core by a flexible open-cell foam having water repellency, and water can be moved with a slight external force.
The surface of the water-repellent foam has a flexible open-cell structure that absorbs water, so even if you press the cosmetic applicator lightly when applying cosmetics, water will be absorbed from the inner layer. It quickly moves from the surface to the surface layer. Therefore, the cosmetic puff of the present invention maintains a state in which water is extremely easy to evaporate until the moisture is exhausted, and the moisture inside can be gradually and uniformly volatilized in the required amount for a long period of time. Therefore,
Its surface is always 5 to 10 degrees Celsius lower than the air temperature, making it an extremely refreshing cosmetic applicator.

In addition, since it is entirely made of foam material, it has excellent flexibility and elasticity, and when used, it does not cause any discomfort when pressed with finger pressure, making it comfortable to use.

It is also ideal as a cosmetic applicator that can be used with or without water.

In the applicator of the present invention, the inner core is also a foam, and the outer surface is also a foam, so when forming the applicator, dimensions must be controlled, punching adhesion, fusing bonding, etc. can be done. Compared to the conventional combination of different materials, production work is easier and more efficient.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of one embodiment of the cosmetic applicator of the present invention, and FIG. 2 is a sectional view of another embodiment. DESCRIPTION OF SYMBOLS 1... First foam having water repellency, 2... Second foam having water absorption, 3... Adhesive, 4...
...Top plate, 5... Impermeable sheet, 6... Adhesive layer.

Claims (1)

[Claims for Utility Model Registration] 1. A flexible first open-cell foam with water repellency, and a flexible second open-cell structure with water absorbency provided on the surface of the first foam. A cosmetic applicator comprising a foam. 2. The cosmetic applicator according to claim 1, wherein the foam skeleton of the second foam contains a water-absorbing material. 3. The cosmetic applicator according to claim 1 or 2, wherein the foam skeleton of the second foam has micropores formed by elution of fine particles soluble in water or an aqueous solution. 4. The cosmetic applicator according to claim 1, wherein the second foam has a foam skeleton surface covered with a water-absorbing film layer. 5. The cosmetic applicator according to claim 4, wherein the coating layer of the second foam is made of a water-absorbing resin. 6. The cosmetic applicator according to claim 4, wherein the coating layer of the second foam is a foam layer that has small pores and is flexible even in a dry state, and the foam layer contains a water-absorbing material. 7. The cosmetic applicator according to claim 4, wherein the coating layer of the second foam has micropores formed by elution of microparticles soluble in water or an aqueous solution. 8. The coating layer of the second foam is a foamed layer having small pores and is flexible even in a dry state, and the foamed layer has micropores formed by elution of fine particles soluble in water or an aqueous solution. 5. The cosmetic applicator according to claim 4, wherein: