JP2000152817A - Applicator for makeup and manufacture thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To transplant hair uniformly on the full surface of a bar-like body by improving the surface water wetting characteristic of a molding made of plastic or elastomer, and enabling the application of adhesive by immersion. SOLUTION: A plastic or elastomer core body formed in a bar shape is stirred in a drum rotated with a particle-like grinder, and thereby satin-finished very fine recessed and projecting portions are formed on the surface of the core body 11. Then, immersion type adhesive is applied to the surface of the core body 11, short fibers are transplanted, and the pair-transplanted core body 11 is taken as the cosmetics applicating portion 1 of an applicator for makeup.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cosmetic applicator. In particular, the present invention relates to a stick-shaped cosmetic applicator used to partially apply a cosmetic.

[0002]

2. Description of the Related Art Conventionally, a concealer has been used as a partial foundation for covering stains, freckles, etc. with a natural feeling, and an eye shadow has been used to give a three-dimensional effect by shading the eyelids and the outer corners of the eyes. . In order to apply a concealer or an eye shadow, a cosmetic applicator in which a stick-shaped plastic core is planted with hair is frequently used, and this stick-shaped applicator is used in combination with cosmetics and Japanese Utility Model Application Laid-Open No. 54-125783. There is a single applicator as disclosed in Japanese Unexamined Patent Publication (Kokai) Publication. In addition, the tip of the plastic core of the rod-shaped applicator may be round or may be acute as in the applicator illustrated in the above-mentioned publication. An applicator implanted on a core with a rounded tip is suitable for applying cosmetics in a spot-like manner, while an applicator implanted on a core with an acute tip has a slope and an acute angle. It is suitable for making a blur with a sharp edge.

However, conventionally, it has been extremely troublesome and expensive to manufacture a cosmetic applicator in which such a rod-shaped plastic core is planted with hair. In other words, in order to implant the hair into the plastic core, an adhesive is applied in advance to the place where the hair is implanted, and the fiber pile is electrostatically implanted. A water-based adhesive (an emulsion-type adhesive emulsified in water) is used as the adhesive for electro-flocking, not a solvent-based adhesive. On the other hand, the water-based adhesive used for flocking is 500 c
It is preferable to use a low-viscosity resin with a viscosity of 500 cps or less, because the surface of a plastic molded product has a property of repelling water, and a low-viscosity material of 500 cps or less can be applied. Even if the agent is applied, there is a problem that the adhesive is repelled and it is difficult to apply the adhesive uniformly on the surface of the molded product. In particular, 500 cp
When the adhesive is applied to the surface of the plastic molded product by immersing it in a low-viscosity water-based adhesive solution having a viscosity of s or less, the adhesive is repelled and partially accumulates, resulting in uneven spots. And only poor quality products can be obtained.

In order to avoid such a problem, 2000
Although a water-based adhesive having a high viscosity of cps to 10,000 cps may be used, if such a high-viscosity adhesive is applied by dipping, there is a problem that the layer of the adhesive becomes too thick. For example, when a high-viscosity adhesive is applied by dipping to a sharp tip of the core body, the adhesive layer becomes too thick, and the resulting flocking product does not have many sharp edges and differs from the desired shape. It will be finished.

For this reason, in a conventional stick-shaped flocked cosmetic applicator, a high-viscosity water-based adhesive of 2,000 cps to 10,000 cps is used, but is applied by a spray method to make the adhesive layer thin. That is, when a high-viscosity water-based adhesive is applied to the surface of a plastic core, the adhesive is applied by spraying the adhesive to each of the plastic cores, not by dipping. For this reason, there is a problem that the loss of the adhesive is large, and that time and labor for applying the adhesive one by one by spraying are increased, thereby increasing the manufacturing cost.

[0006]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems, and enables a low-viscosity water-based adhesive having a viscosity of 500 cps or less to be thinly and uniformly applied to the surface of a molded product by immersion. The present invention provides a cosmetic applicator which can be uniformly inoculated on the entire surface of the rod-shaped body, and which can be manufactured at low cost without impairing the function as an applicator and without labor. The purpose is to provide.

[0007]

According to the present invention, the cosmetic application section comprises a core and a flocking pile covering the surface of the core, and the core is a molded article made of plastic or elastomer. The above object is achieved by a cosmetic applicator characterized in that the surface of the core is a rough surface on which fine irregularities are formed.

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

Further, according to the present invention, the surface of the core is made rough by stirring the core made of plastic or elastomer molded into a rod shape together with the granular abrasive in a rotating drum. Manufacturing of a cosmetic applicator characterized in that an emulsion type adhesive is applied to the surface of a core, short fibers are flocked, and the flocked core is used as a cosmetic application section of a cosmetic applicator. The above object is achieved by a method.

[0010] Alternatively, the surface of the core is made rough by spraying a granular abrasive onto a rod or a core made of plastic or elastomer, and then an emulsion-type adhesive is applied to the core. The above object is achieved by a method for producing a cosmetic applicator, which comprises applying a short fiber to the surface of the cosmetic applicator and implanting the short fibers, and using the implanted core as a cosmetic application section of the cosmetic applicator.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an example of a cosmetic using the cosmetic applicator of the present invention. FIG. 1 (a) is a front view showing the entire cosmetic, and FIG. The state where the lid 4 was opened is shown. The body 3 contains a cosmetic, while the lid 4 is provided with the cosmetic applicator of the present invention. In this embodiment, the makeup applicator comprises a handle 2 and an application portion 1 attached to the tip of the handle 2.

FIG. 2A is a front view showing the core 11 in the cosmetic applying section 1 of the cosmetic applicator according to the present invention, and FIG. 2B is a front view showing the core 11 shown in FIG. 2A. FIG. The core 11 is made of plastic or elastomer injection-molded into a rod shape, and serves as a core 1 of a coating portion.
1a and an attachment portion 11b attached to the handle 2. In the present invention, the core 11, particularly the core 11 a of the coating portion, is roughened, and the surface thereof has fine irregularities, and has a ground glass shape. Mounting part 1
1b, as shown in FIG. 2B, the upper half has a rectangular 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 cosmetic 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 a core 11 shown in FIG. Is piled with a pile 12 via an adhesive.

FIG. 4 is a front view showing the state of flocking at the application section of the cosmetic applicator of the present invention. As shown in this figure, in the applicator of the present invention, the pile 12 is formed by the core application portion 11a.
The hairs are evenly covered and planted.

On the other hand, FIG. 5 shows a conventional core, that is, a molded plastic core having a smooth surface, which is coated with a low-viscosity water-based adhesive by dipping. The figure shows the result of electrostatic flocking. In the case of a smooth surface that is not roughened in this way, the adhesive is only partially adhered, so that the core 11 can be seen even when the hair is implanted, and the hair implantation 12 is partially peeled. It is in a state.

The core in the present invention includes, for example, 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), a molded article of a plastic or elastomer such as ethylene propylene terpolymer (EPT), polyisoprene (IR), or silicone rubber can be used.

In the present invention, in order to finish the surface of the core body to a rough surface having fine irregularities, for example, the core body 11 of the applicator together with the granular abrasive is placed in a horizontal cylindrical drum, and the cylindrical drum is removed. By rotating about the horizontal axis, the abrasive and the core body are rubbed, and the surface of the core body is finely roughened to have a rough surface. Alternatively, the surface of the core body is made rough by spraying a granular abrasive onto the core body made of plastic or elastomer molded into a rod shape. In the case of using a cylindrical drum, the time required for finishing the rough surface varies depending on the amount of the core and the amount of the abrasive to be added.
It may be about 0 minutes. The fine irregularities on the rough surface were scratches or ridges having a depth of about 0.1 μm to 100 μm when viewed with an electron microscope.

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

Since the surface of the core body is finished as a ground glass-like rough surface having fine irregularities as described above, the wettability to the water-based adhesive is improved, and even the low-viscosity water-based adhesive can be uniformly applied. Can be. 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, fine irregularities are given to a molding die,
Similarly, a low-viscosity aqueous 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. The present inventor considers that even if fine irregularities are formed on the surface of the core body by using a molding die, the properties of the interface with the water-based adhesive are substantially the same as when no irregularities are provided. Since the nature of the interface is essentially different from the case where the surface is roughened as in the invention, the wettability of the water-based adhesive is not improved.

Then, fine irregularities are formed on the molding die, and the core thus molded is put into a cylindrical drum together with the particulate abrasive as described above and rotated.
The surface of the core was finished in a rough surface, and the wettability to the water-based adhesive was improved.

The pile for flocking in the present invention includes 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 such as natural sponge and cotton sponge can be used.

As described above, after the surface of the core body is roughened, a water-based adhesive is applied to the surface of the core body by immersion, and flocking is performed by a usual electrostatic flocking machine. The hair-implanted core is used as an application part of a cosmetic applicator.

[0024]

EXAMPLES Example 1 A polyethylene molded product having a diameter of 2.5 mm and a length of 15 mm and having a sharp end at one end as shown in FIG. 2 was used as a core by injection molding. This core is placed in a rotatable 300-liter horizontal drum at 12,000.
The book and 10 kg of a 300-mesh alumina oxide synthetic abrasive were put in, and the drum was rotated for 30 minutes. After that, when you take out the core, the surface of the core is frosted glass,
When observing this with a microscope, 0.1 μ
m (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 on the surface of the core body, it spread immediately on the surface and became uniformly wet without repelling water.

An adhesive solution was applied to the core by dip coating with the following formulation as an aqueous adhesive solution.

Dicnal # 1500 [product of Dainippon Ink and Chemicals, Inc.] 50 parts Dicnal # 1870 [product of Dainippon Ink and Chemicals, Inc.] 50 parts Denacol EX-614 [Dainippon Ink and Chemicals, Inc.] 3 parts) Aqueous ammonia was added to adjust the viscosity to 350 cps.

Next, a nylon flocking pile having a thickness of 1 d (denier) and a length of 0.6 mm was electrostatically transplanted to the core body coated with the adhesive. But I was able to get a sharp one. This was attached to a handle to make a cosmetic applicator.

Comparative Example The same molded product as in Example 1 was used for the core. This core body was immersed in the same adhesive solution as used in Example 1 and subjected to dip coating without performing rough surface processing as in Example 1. However, the adhesive liquid does not adapt to the surface of the core body, and is repelled and beaded on the surface of the core body, or adheres partially unevenly, and the adhesive liquid cannot be applied to a uniform thickness. Was. Example 1 is applied to the core body in this state.
In the same way as above, the nylon flocking pile was electrostatically flocking,
As shown in FIG. 5, there were some places where piles were not implanted, which was unsuitable for use as an application part of a cosmetic applicator.

Example 2 A polyurethane molded product having a diameter of 2.5 mm and a length of 8 mm and having a sharp end at one end as shown in FIG. 2 was used as a core by injection molding. While fixing and rotating this core on a plate, a 400-mesh alumina oxide synthetic abrasive was sprayed. As a result, the surface of the core body was roughened and frosted. When this was observed with a microscope, a fine brush-like material (unevenness) having a length of 0.1 μm or more was uniformly formed on the entire surface of the core body.

An adhesive solution was applied to the core by dip coating with the following formulation as an aqueous adhesive solution.

Iodozole WA-60 [product of Kanebuchi Spinning Co., Ltd.] 50 parts Canebinol YC-35 [product of Kanebuchi Spinning Co., Ltd.] 1.5 parts Polysol F-417 [product of Showa Kogaku Co., Ltd.] 50 parts Deconal EX-614 [product of Showa Polymer Co., Ltd.] 1.5 parts Aqueous ammonia was added to adjust the viscosity to 200 cps.
When this adhesive solution was applied to the above-mentioned rough finished core by dip coating, it could be applied very uniformly. A nylon flocking pile having a thickness of 0.8 d (denier) and a length of 0.6 mm was electrostatically transplanted to the core coated with the adhesive to form a coating portion for a cone sealer. This was uniformly planted, had good pile standing, and had sharp edges.

[0032]

According to the present invention, fine irregularities are formed on the surface of a molded article of a plastic or an elastomer, and the surface of the molded article is made into a frosted glass-like rough surface so that the surface has good water wettability.

Therefore, the low-viscosity aqueous adhesive can be uniformly applied to the surface of the plastic or elastomer core by immersion. Moreover, since the adhesive layer can be made thinner, the hairs are evenly implanted and the pile is well standing, so that the cosmetic can be easily applied. In addition, if the tip of the core has an acute angle, even if the adhesive is applied, the hair is implanted while maintaining the acute state, so the obtained applied portion has both the surface portion and the edge. It can be used to apply cosmetics, and is suitable for applications requiring fine techniques such as eye shadow.

According to the present invention, since the adhesive can be applied by immersion, it takes less time and effort than the conventional spray coating, the loss of the adhesive is extremely small, and the manufacturing cost is reduced.

[Brief description of the drawings]

FIG. 1 shows an example of a cosmetic using the cosmetic applicator of the present invention, in which (a) is a front view showing the entire cosmetic, 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 11 in a cosmetic applying section 1 of the cosmetic applicator according to the present invention, and FIG. 2 (b) is a core shown in FIG. 2 (a). FIG. 11 is a bottom view of FIG.

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

FIG. 4 is a front view showing a flocking state in an application section of the cosmetic applicator of the present invention.

FIG. 5 shows a conventional core body coated with an adhesive by dipping and electrostatically flocking.

FIG. 6 is an electron micrograph before roughening a core body used in Example 1.

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Application part 2 Pattern 11 Core body 11a Portion of application part 11b Mounting part to be attached to pattern 2 12 Pile

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Sadahito Hisayama Inside Nakawa Bussan Co., Ltd. Awaji Plant, 6-3-41 Nishiawaji, Higashiyodogawa-ku, Osaka-shi

Claims (3)

[Claims] 1. A cosmetic application part comprising a core and a flocking pile covering the surface of the core, wherein the core is a molded product made of plastic or elastomer, and the surface of the core is finely uneven. A cosmetic applicator characterized by having a rough surface on which is formed. 2. A rod-shaped core made of plastic or elastomer is stirred together with a particulate abrasive in a rotating drum to roughen the surface of the core, and thereafter, an emulsion-type adhesive is applied to the core. A method for producing a cosmetic applicator, comprising applying a short fiber to the surface of a body, and implanting the short fibers, and using the implanted core as a cosmetic application section of the cosmetic applicator. 3. The surface of the core body is roughened by spraying a granular abrasive onto a core body made of plastic or elastomer molded into a rod shape, and thereafter, an emulsion-type adhesive is applied to the core body. A method for producing a cosmetic applicator, comprising applying a short fiber to a surface of the cosmetic applicator by flocking short fibers, and using the flocked core as a cosmetic application section of the cosmetic applicator.