JPS5939940Y2 - cosmetic applicator - Google Patents

Description

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

[Conventional technology]

Water-based makeup cosmetics are those that are applied by dissolving the cosmetics in water, and because they use water, they provide a refreshing feeling and have traditionally been widely used as summer cosmetics.

This aqueous makeup cosmetic is in the form of a solid powder, and is applied to the face after being deposited on a sponge body impregnated with water.

Conventionally, natural sponge blocks and polyvinyl alcohol foams have been used as sponge applicators for use in cosmetics.

[Problem that the invention attempts to solve]

The conventional cosmetic applicators as described above have the following problems.

■ In a wet state, it has elasticity and flexibility, making it suitable for applying cosmetics; however, in a dry state, it hardens to the point where it has no elasticity or flexibility, making it impossible to apply cosmetics. It disappears.

■ After use, it begins to harden as moisture evaporates in a short time,
For this reason, it is necessary to wet the entire product by massaging it in water each time it is used.

■ Since water is essential for applying makeup, it is impossible to apply makeup in a place without water.

The above-mentioned problems are extremely inconvenient in the use of cosmetic applicators, and some kind of improvement has been desired.

[Process leading up to the idea]

Initially, in order to solve the above-mentioned problems, the present inventor tried to make a cosmetic applicator by laminating a thin foamed polyvinyl alcohol sheet on the surface of a polyurethane foam having elasticity and flexibility.

However, although this cosmetic applicator could produce an elastic effect, the polyvinyl alcohol foam laminated to the surface hardened during drying, and it was not possible to achieve the expected significant improvement effect.

Next, a cosmetic applicator was prototyped by forming a foam layer with a polyurethane emulsion on the surface of the skeleton constituting the polyurethane foam, and its effectiveness was confirmed.

However, although this cosmetic applicator has no problems with elasticity and flexibility, the foam layer formed on the foam skeleton does not get wet with water.
Water retention was extremely poor, and the solid powder cosmetic did not transfer well to the cosmetic applicator, resulting in an unsatisfactory result.

It was found that this is because the polyurethane resin itself has no water absorbency at all, and only absorbs water through the foamed pores of the foamed layer, which is the cause of poor water wetting and water retention.

[Purpose of invention]

The present invention was developed in view of the above-mentioned background, and its purpose is to provide a cosmetic applicator that has elasticity and flexibility as an applicator both in wet and dry conditions. To provide an extremely convenient cosmetic applicator that can be used to apply makeup even in a place without moisture for a long period of time once wetted with water.

For other purposes, it is extremely easy to use (instantly) when wet.
The object of the present invention is to provide a cosmetic applicator that can be used as a cosmetic applicator.

Still another object is to provide a cosmetic applicator that can be used to apply powder cosmetics other than aqueous makeup cosmetics, if necessary.

[Means for solving problems]

In the present invention, the cosmetic is made of a porous material that is breathable and flexible even in a dry state, and a synthetic resin coating layer containing a hydrogel-forming polymer provided on the surface of the porous material. The applicator achieves the above-mentioned objectives and solves the problems.

[Effect]

In this invention, a synthetic resin coating layer containing a hydrogel-forming polymer is provided on the surface of a porous material with air permeability such as a foam or nonwoven fabric, so it has extremely high water absorption and water retention properties. .

That is, the hydrogel-forming polymer has strong water absorption and water retention properties, and can absorb and retain water tens to hundreds of times its own weight.

Therefore, the moisture on the outer surface of the applicator (the surface of the applicator that comes into contact with the skin), which is retained and absorbed by the hydrogel-forming polymer, provides a cool and refreshing feeling when applying the cosmetic.

In addition, it has good water absorption, so it becomes wet instantly, and once it contains water, it is absorbed and retained by the hydrogel-forming polymer, which has high water absorption and water retention properties, so water evaporates extremely slowly and remains dry for a long time. It can retain moisture for a long time.

Therefore, it is not necessary to wet the entire cosmetic applicator in water each time it is used, and if the cosmetic applicator of the present invention is wetted and carried, it is convenient to apply makeup even in places where there is no water.

Furthermore, the hydrogel-forming polymer is firmly fixed to the surface of the porous material by the synthetic resin and will not peel off.

Since the synthetic resin coating layer containing the hydrogel-forming polymer is provided on the surface of the porous material, the cosmetic applicator of the present invention has a smooth surface, allowing for even application of cosmetics.

In the present invention, the applicator is mainly made of a porous material that is breathable and flexible even in dry conditions.
It has elasticity and flexibility not only in a wet state but also in a dry state, and is suitable for applying powder cosmetics other than water-based makeup cosmetics.

〔Example〕

The present invention will be explained below based on the drawings.

Foams with open cells such as foamed polyurethane, foamed rubber, and foamed polyvinyl chloride (see Figure 1), polyester, polyamide, acrylic rayon, vinylon, etc.
Hydrogel is applied to the surface of a porous breathable material A, such as a nonwoven fabric obtained from a fibrous material such as polyolefin (see Figure 2), in a synthetic resin solution such as acrylic resin, polyurethane resin, or polyester resin. Generated polymer 3
A film is formed using a paint solution containing

As for the film forming method, the immersion treatment method provides the best finish.

In the case of immersion treatment, the treatment liquid penetrates into the interior of the cosmetic applicator made of porous material A, so that the surface of the skeleton 10 forming porous material A is coated.

After immersion, the liquid is drained and a drying process is performed, whereby the synthetic resin component 2 is firmly fixed to the surface of the skeleton 10, and the hydrogel-forming polymer 3 is also dispersed and fixed in the synthetic resin component 2. become in a state of being

In other words, the synthetic resin component 2 functions as a bonding 'fMWr' for fixing the skeleton 1 and the hydrogel-forming polymer 3 together.

The hydrogel-forming polymer has strong water absorption and water retention properties, and in particular, one that can absorb and retain water tens to hundreds of times its own weight is suitable.

The hydrogel-forming polymer 3 used here is produced from a crosslinked product of an alkali metal salt of carboxymethyl cellulose, a metal salt of polyacrylic acid, a crosslinked product of polyalkylene oxide, and a cellulose acrylonitrile graft polymer. Carboxyl alkali metal salts and the like are extremely effective.

These materials have a water-holding capacity (the amount of water they still retain after being immersed in water to absorb water and then centrifuged).
is tens to hundreds of times its own weight, so even if a small amount of external pressure is applied, it will not release the liquid it has absorbed.

In addition, in a test conducted by Applicant A, when a short fiber material such as sponge powder, hemp, cotton, or rayon is used and mixed together with the hydrogel-forming polymer 3, the dry feeling during application increases and the feeling of reuse is improved. It was also found that

[Effect of idea]

The cosmetic applicator of the present invention has a synthetic resin coating layer containing a hydrogel-forming polymer on the surface of an air-permeable porous body, so it has extremely high water absorption and water retention properties.
Provides a cool and refreshing feeling when applying cosmetics.

The hydrogel-generating polymer is firmly fixed to the surface of the porous material by the synthetic resin and will not peel off, and the synthetic resin coating layer makes the surface of the porous material smooth, allowing the cosmetic to be applied evenly. can.

The cosmetic applicator of the present invention is mainly made of a porous material that is breathable and flexible even in a dry state, so it has elasticity and flexibility not only in a wet state but also in a dry state. It is suitable for applying powder cosmetics other than water-based makeup cosmetics.

Hydrogel-forming polymers do not physically retain water in the foam pores or gaps in their skeleton like normal sponges, but instead
It retains water within its molecules.

Therefore, moisture is difficult to evaporate and dry. Moreover, if it retains moisture, it will remain moist for a long period of time.

Therefore, once the cosmetic applicator of the present invention is moistened with water, it can retain moisture for a long time, eliminating the need to wet the entire product by massaging it in water each time it is used, and it can also be carried wet with water. For example, it is convenient because you can apply makeup even in places where there is no water.

In addition, because it has good water absorption, it is extremely easy to wet the applicator, and even if the applicator has a high water content, the hydrogel-forming polymer retains water, so your skin will not get wet more than necessary. It is easy to use and does not impair the usability.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of one embodiment of the cosmetic applicator of the present invention.
The skeleton is made of foam. FIG. 2 is a sectional view of another embodiment of the cosmetic applicator of the present invention, which has a skeleton made of nonwoven fabric. A... Porous material with breathability, 1... Skeleton, 2
...Synthetic resin component, 3-...Hydrogel-forming polymer.

Claims (1)

[Claims for Utility Model Registration] 1. A porous material that is breathable and flexible even in a dry state, and a synthetic resin coating layer containing a hydrogel-forming polymer provided on the surface of the porous material. A cosmetic applicator comprising: 2. The cosmetic applicator according to claim 1, wherein the synthetic resin coating layer containing the hydrogel-forming polymer covers the entire surface of the skeleton forming the porous material.