JP3478738B2 - Cosmetic applicator and manufacturing method thereof - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a cosmetic applicator. In particular, the present invention relates to a stick-shaped cosmetic applicator used for partially applying cosmetics.

[0002]

2. Description of the Related Art Conventionally, a concealer is used as a partial foundation that naturally covers spots, freckles, etc., and eye shadow is used to give a three-dimensional effect by shading the eyelids and the outer corners of the eyes. . To apply a concealer or eye shadow, a cosmetic applicator in which flocking is applied to a rod-shaped plastic core is often used. This rod-shaped applicator is used in combination with cosmetics or in actual use, Sho 54-1225783. There is a single applicator as disclosed in Japanese Patent Publication. The tip of the plastic core of the rod-shaped applicator may be rounded or may have an acute angle like the applicator illustrated in the above publication. An applicator with flocked hair with a rounded tip is suitable for applying cosmetics in spots, and an applicator with flocked hair with a sharp tip has an acute angle with the slope. It's suitable for making blurry makeup with different edges.

However, it has been very time-consuming and expensive to manufacture a cosmetic applicator in which hair is applied to such a rod-shaped plastic core body. That is, in order to implant hair on a plastic core, an adhesive is applied in advance to the area where the hair is to be implanted, and the fiber pile is electrostatically implanted. A water-based adhesive (emulsion type adhesive emulsified in water) is used as the adhesive for electro-planting hair, not a solvent-based adhesive. On the other hand, the water-based adhesive used for flocking is 500c
A low viscosity of ps or less is preferable because it can be thinly applied and can be applied by dip coating, but since the surface of a plastic molded product generally has a property of repelling water, a low viscosity of 500 cps or less can be adhered to the plastic molded product. Even if the agent is applied, the adhesive is repelled, which makes it difficult to uniformly apply the adhesive to the surface of the molded product. Especially 500 cp
Even if you try to apply the adhesive to the surface of a plastic molded product by immersing it in a liquid of a low-viscosity water-based adhesive having a viscosity of s or less, the adhesive is repelled and partially accumulates to cause spots. And only the ones of poor quality can be obtained.

To avoid this, 2000
A high-viscosity water-based adhesive having a viscosity of cps to 10,000 cps may be used. However, when such a high-viscosity adhesive is used for application by dipping, there is a problem that the adhesive layer becomes too thick. For example, if a highly viscous adhesive is applied by dipping to a tip of the core having an acute angle, the adhesive layer becomes too thick, so the resulting flocked product does not have many acute angles, and the desired shape is different. It will be finished.

Therefore, in a conventional stick-shaped hair-applied cosmetic applicator, a high viscosity water-based adhesive having a viscosity of 2000 cps to 10000 cps is used, but it is applied by a spray method in order to thin the adhesive layer. That is, when a highly viscous water-based adhesive is applied to the surface of a plastic core, the adhesive is sprayed onto each plastic core one by one, rather than by dipping. For this reason, there is a problem that the loss of the adhesive is large, and it takes time and effort to apply each one by spraying, resulting in an increase in manufacturing cost.

[0006]

DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned problems of the prior art so that a water-based adhesive having a low viscosity of 500 cps or less can be applied thinly and uniformly to the surface of a molded product by dipping. The present invention provides a cosmetic applicator that allows uniform hair transplantation on the entire surface of a rod-shaped body, does not impair the function as an applicator, and can be manufactured at low cost without much labor and a method for manufacturing the same. It is intended to provide.

[0007]

According to the present invention, the cosmetic application portion comprises a core body and a flocked pile covering the surface of the core body, and the core body is injected in the shape of a rod made of plastic or elastomer. a been molded, the surface of the core body scratch depth 0.1μm~100μm or swelling
The above object is achieved by a makeup applicator characterized by being a frosted glass-like rough surface on which fine irregularities are formed.

In this case, the surface of the core body may be smooth or may have irregularities formed by molding.

According to the present invention, the rod-shaped injection- molded core body made of plastic or elastomer is stirred together with the granular abrasive in a rotating drum so that the surface of the core body is 0.1 μm to 100 μm. Depth of scratches
Or a scraper with fine ridges and ridges
Make a lath-shaped rough surface, and then apply an emulsion type adhesive to the ground glass-like surface of the core, and apply short fibers to the surface.
The above object is achieved by a method for producing a cosmetic applicator, which is characterized in that the hair-implanting process is performed on the hair, and the core body subjected to the flocking is used as a cosmetic application portion of the cosmetic applicator.

Alternatively, the surface of the core is made to have a particle diameter of 0.1 μm by spraying a granular abrasive on a core made of a plastic or an elastomer injection- molded into a rod shape.
Fine recesses with 100 μm deep scratches or bumps
A frosted glass-like roughened surface is formed , and then an emulsion type adhesive is applied to the frosted glass-like surface of the core, short fibers are flocked on the surface, and the flocked core is made up. The above object is achieved by a method of manufacturing a cosmetic applicator, which is characterized in that the cosmetic applicator is used as a cosmetic applicator.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an example of a cosmetic product using the cosmetic applicator of the present invention. (A) is a front view showing the entire cosmetic product, and (b) is a main body 3 It shows a state in which the lid 4 is opened. Cosmetics are contained inside the main body 3, while the lid 4 is provided with the makeup applicator of the present invention. In this embodiment, the makeup applicator comprises a handle 2 and an applying section 1 attached to the tip of the handle 2.

FIG. 2 (a) is a front view showing the core body 11 in the cosmetic application section 1 of the makeup applicator according to the present invention, and FIG. 2 (b) is the core body 11 shown in FIG. 2 (a). FIG. The core body 11 is made of a plastic or elastomer injection-molded into a rod shape, and serves as the core of the coating portion 1.
1a and a mounting portion 11b for mounting on the handle 2. In the present invention, the core body 11, particularly the core portion 11a of the coating portion, is roughened, and fine irregularities are formed on the surface of the core body 11 to form a ground glass. Mounting part 1
2b, the upper half has a quadrangular cross section, the lower half 11c has a circular cross section, and a groove 11d extends in the vertical direction.

FIG. 3 is a front view showing a makeup applicator 1 according to the present invention, in which a coating portion 1 of the present invention is formed at the tip of a handle 2, and a portion 11a of the core body 11 shown in FIG. The pile 12 is flocked to the inner surface of the pile with an adhesive.

FIG. 4 is a front view showing the state of flocking at the application portion of the cosmetic applicator of the present invention. As shown in this figure, in the applicator of the present invention, the pile 12 is the application portion 11a of the core body.
The whole is uniformly covered with hair.

On the other hand, FIG. 5 shows a conventional core body, that is, a plastic core body which has been molded and has a smooth surface, and a low-viscosity water-based adhesive is applied by dipping. The figure shows the result of electrostatic flocking. In the case of a smooth surface that is not roughened in this way, since the adhesive only partially adheres, the portion of the core body 11 can be seen even after the flocking, and the flocking 12 is partially peeled off. It is in a state.

Examples of the core in the present invention include polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), nylon, polyurethane (PU), polyacrylonitrile butadiene styrene (ABS), polystyrene (PS), Polyacrylonitrile butadiene rubber (NBR), polystyrene butadiene rubber (SBR), polyethylene propylene rubber (EP
R), ethylene propylene terpolymer (EPT), polyisoprene (IR), plastics such as silicone rubber, or an elastomer molded product can be used.

In the present invention, in order to finish the surface of the core body into a rough surface having fine irregularities, for example, the core body 11 of the applicator is put together with the granular abrasive in a horizontal cylindrical drum, and the cylindrical drum is set. By rotating around the horizontal axis, the abrasive material and the core body are rubbed with each other, so that the surface of the core body has fine uneven scratches and becomes a rough surface. Alternatively, the surface of the core body is roughened by spraying the granular abrasive material onto the core body made of plastic or elastomer molded in the shape of a rod. In the case of using a cylindrical drum, the time required for finishing the surface to be rough differs depending on the amounts of the core body and the abrasives charged, but is 20 to 6
About 0 minutes is enough. The fine irregularities on the rough surface were scratches or swells with a depth of about 0.1 μm to 100 μm when viewed with an electron microscope.

As the granular abrasive, alumina or alumina, zirconium oxide, natural or synthetic stones such as emery, or sand may be used.

In this way, the surface of the core is finished as a ground glass-like rough surface having fine uneven scratches, so that the wetting property with respect to the water-based adhesive is improved and even a low-viscosity water-based adhesive can be applied uniformly. You can According to experiments, 50
Even a water-based adhesive having a viscosity of 0 cps or less can be uniformly applied to the surface of the core body by dipping. Further, those having a viscosity of 200 to 300 cps were more preferable.

On the other hand, the molding die is provided with fine irregularities,
Similarly, a low-viscosity water-based adhesive was applied to the molded core by dipping, but the adhesive could not be applied uniformly despite the presence of fine irregularities on the surface of the core. Considering to the inventors of the present invention, even if fine irregularities are formed on the surface of the core body by a molding die, the properties of the interface to the water-based adhesive are substantially the same as those without the irregularities. The wetting property of the water-based adhesive is not improved because the properties of the interface are essentially different from the case where the surface is roughened as in the invention.

Then, fine irregularities are formed on the molding die, and the core body molded by this is put into the cylindrical drum together with the granular abrasive and rotated as described above.
The surface of the core body was finished to be rough, and the wetting property with respect to the water-based adhesive was improved.

The piles for flocking in the present invention include nylon, polyester, polybutylene terephthalate,
A fiber pile obtained by cutting fibers such as rayon into 0.5 mm to 1 mm may be used. Alternatively, fine particles of natural sponge, cotton sponge or the like can be used.

As described above, after the surface of the core body is roughened, the water-based adhesive is applied to the surface of the core body by dipping, and flocking is performed by a usual electrostatic flocking machine. This flocked core is used as the application part of the makeup applicator.

[0024]

EXAMPLE 1 A polyethylene molded product having a diameter of 2.5 mm and a length of 15 mm and having an acute-angled end surface as shown in FIG. 2 was used as a core body by injection molding. This core was placed in a rotatable 300-liter horizontal drum for 12,000.
A book and 10 kg of a 300 mesh alumina oxide synthetic abrasive were put therein and the drum was rotated for 30 minutes. After that, when I took out the core, the surface of the core was frosted glass,
When observing this with a microscope, the entire surface of the core body is
Fine scratches (irregularities) having a depth of m or more were formed (note that FIG. 6 shows an electron micrograph of the untreated core, and FIG.
Shows an electron micrograph of the core after the treatment). Further, when water was dropped onto the surface of this core, it immediately spread to the surface and became evenly wet without repelling water.

An aqueous adhesive solution having the following composition was applied to the core body by dip coating.

Dikunal # 1500 [Product of Dainippon Ink and Chemicals, Inc.] 50 parts Dikunal # 1870 [Product of Dainippon Ink and Chemicals, Inc.] 50 parts Denacol EX-614 [Dainippon Ink and Chemicals, Inc.] The product was prepared by adding 3 parts of ammonia water to a viscosity of 350 cps.

Next, as a result of electrostatically flocking a nylon flocking pile having a thickness of 1 d (denier) and a length of 0.6 mm on the core body coated with this adhesive, the edges of the sharp-angled surface are uniformly flocked and excellent in pile standing. Was able to get a sharp one. This was attached to the handle to give a makeup applicator.

Comparative Example The same molded product as in Example 1 was used for the core. This core body was dipped in the same adhesive solution as that used in Example 1 without being subjected to the roughening treatment as in Example 1, and was dip-coated. However, the adhesive liquid does not adapt to the surface of the core body and is repelled, forming a ball on the surface of the core body or partially unevenly attached, and the adhesive liquid cannot be applied to a uniform thickness. It was Example 1 was applied to the core body in this state.
When the nylon flocking pile was electrostatically flocked,
As shown in FIG. 5, there were some places where the pile was not planted, and it was unsuitable for use as an application part of a makeup applicator.

[Example 2] As a core, a polyurethane molded product having a diameter of 2.5 mm and a length of 8 mm and having an acute-angled surface at one end as shown in Fig. 2 was used. While this core was fixed on a plate and rotated, a 400-mesh alumina oxide synthetic abrasive was sprayed. As a result, the surface of the core body was roughened and became frosted glass. When this was observed with a microscope, fine napped substances (unevenness) having a length of 0.1 μm or more were uniformly formed on the entire surface of the core body.

An aqueous adhesive solution having the following composition was applied to the core body by dip coating.

Iodozol WA-60 [Product of Kanegafuchi Spinning Co., Ltd.] 50 parts Kanebinol YC-35 [Product of Kanegafuchi Spinning Co., Ltd.] 1.5 parts Polyzole F-417 [Product of Showa High Polymer Co., Ltd.] 50 parts Deconal EX-614 [Product of Showa Highpolymer Co., Ltd.] 1.5 parts Ammonia water was added to prepare a viscosity of 200 cps.
When this adhesive liquid was applied to the above-mentioned roughened core body by dip coating, it could be applied extremely uniformly. A nylon flocking pile having a thickness of 0.8 d (denier) and a length of 0.6 mm was electrostatically flocked to the core body coated with this adhesive to prepare a coating section for a corn sealer. The hair was evenly planted, the pile was well raised, and the edge of the acute-angled surface was sharp.

[0032]

EFFECTS OF THE INVENTION According to the present invention, the surface of a molded article of plastic or elastomer is provided with fine irregularities to form a frosted glass-like rough surface, and the surface has good wettability with water.

Therefore, the low-viscosity water-based adhesive can be uniformly applied to the surface of the plastic or elastomer core by dipping. Moreover, since the adhesive layer can be thinned, the hair is evenly planted and the pile is well raised, so that the cosmetic can be easily applied. Also, when the tip of the core has an acute angle, even if the adhesive is applied, hair is planted with the acute angle being maintained, so the obtained application part has both the surface portion and the edge. It can be used to apply cosmetics and is suitable for applications that require detailed techniques such as eye shadow.

According to the present invention, since the adhesive can be applied by dipping, compared to the conventional spray coating, it takes less labor, the loss of the adhesive is extremely small, and the manufacturing cost is low.

[Brief description of drawings]

FIG. 1 shows an example of a cosmetic product using a cosmetic applicator of the present invention, (a) is a front view showing the entire cosmetic product, and (b) is a state in which a lid 4 is opened from a main body 3 Is shown.

FIG. 2 (a) is a front view showing a core body 11 in a cosmetic material application section 1 of a makeup applicator according to the present invention, and FIG. 2 (b) is a core body shown in FIG. 2 (a). 11 is a bottom view of FIG.

FIG. 3 is a front view showing a makeup applicator 1 according to the present invention.

FIG. 4 is a front view showing the state of flocking at the application part of the cosmetic applicator of the present invention.

FIG. 5 shows a conventional core in which an adhesive is applied by dipping and electrostatically flocked.

6 is an electron micrograph of the core body used in Example 1 before roughening.

FIG. 7 is an electron micrograph of the core body used in Example 1 after roughening.

[Explanation of symbols]

1 application section 2 patterns 11 core 11a Part that serves as the core of the coating section 11b Attachment part attached to handle 2 12 piles

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Sadaka Hisayama 6-3-1, Nishi-Awaji, Higashiyodogawa-ku, Osaka-shi, Osaka Nakamura & Co., Ltd. Awaji factory (56) Reference JP-A-1-141032 (JP, A) Actual Development Sho 58-100709 (JP, U) Actual Public Sho 53-35077 (JP, Y1) (58) Fields investigated (Int.Cl. ⁷ , DB name) A45D 34/04 A45D 33/34

Claims (3)

(57) [Claims] 1. A cosmetic application part is composed of a core body and a flocked pile covering the surface of the core body, and the core body is a rod-shaped molded article made of plastic or elastomer, The surface has a depth of 0.1 μm to 100 μm.
A rub on which fine irregularities consisting of scratches or bumps are formed
A cosmetic applicator characterized by having a glassy rough surface. 2. A rod-shaped injection- molded core body made of plastic or elastomer is stirred together with a granular abrasive in a rotating drum to remove the surface of the core body.
From scratches or swells with a depth of 0.1 μm to 100 μm
With a frosted glass-like rough surface on which fine irregularities are formed ,
Then, an emulsion type adhesive is applied to the ground glass surface of the core, short fibers are flocked on the surface, and the flocked core is applied to the cosmetic application part of a cosmetic applicator. A method for producing a cosmetic applicator, comprising: 3. The surface of the core body is 0.1 μm to 100 by spraying a granular abrasive to a core body made of plastic or elastomer injection- molded into a rod shape.
Fine unevenness consisting of scratches or ridges with a depth of μm
Made a frosted glass-like roughened surface, then apply an emulsion type adhesive to the frosted glass surface of the core body, short fibers are flocked on the surface, and the flocked core body is applied cosmetically A method for manufacturing a makeup applicator, which is a cosmetic application part of the tool.