HK1169285A - Makeup applicator - Google Patents

Abstract

When using a makeup applicator, a cosmetic material has been excessively absorbed into the makeup applicator, sound due to void has occurred during the use of the makeup applicator, or wrinkles have occurred by the use thereof. In order to solve this, provided is a makeup applicator wherein one surface of a slice sheet (1) obtained by slicing an open-cell foam sponge forms a coating surface, and a coating layer (2) is provided so as to adhere to a recessed section, in accordance with the shape of the inner surface thereof, in which two types of recessed sections: a recessed section formed by that the surface of the other surface of the slice sheet (1) is roughened by a slice blade, and a recessed section formed by that the original foams of the open-cell foam sponge are cut are combined and formed, and wherein the surface on the side on which the coating layer (2) of the slice sheet (1) is formed is bonded to a base material (3).

Description

Cosmetic applicator

Technical Field

The present invention relates to a cosmetic applicator formed by closely attaching a coating film to one surface of a cut continuous foam body in accordance with a concave shape and joining the coating film surface to a base material. More specifically, the present invention relates to a cosmetic applicator formed by thermal transfer of a film that is in close contact with a plurality of concave portions formed on a cut surface.

Background

When the amount of the cosmetic applied to the applicator is large, the applicator slips and cannot be applied uniformly. Conversely, when the amount of the cosmetic on the applicator is small, the resistance on the skin increases during application, which is not preferable from the viewpoint of the feeling of use.

Therefore, in order to apply an appropriate amount of cosmetic composition, a cosmetic sponge has been developed in which the amount of cosmetic composition to be impregnated into the sponge is improved by adjusting the foam structure, foam density, and thickness of the cosmetic sponge.

Specifically, for foaming of NBR latex and NR latex, and wet foaming of urethane, a method is used in which the amount of impregnation is adjusted within an appropriate range by improving the size and density of bubbles, and the amount of impregnation of the cosmetic is adjusted by adjusting the cut thickness of a continuous bubble body.

The former technique of adjusting the size and density of the cells to control the impregnation amount within an appropriate range is a technique that can be arbitrarily performed by a person skilled in the art, but there are some problems to be improved in the latter technique of adjusting the cut thickness of the continuous cell body. That is, the amount of impregnation can be arbitrarily adjusted by utilizing the foaming structure of the sponge and its physical properties to improve the touch and spreadability of the skin, and therefore, the sponge has received a high degree of attention from the industry, but there is a problem that the cosmetic penetrates into the surface on the opposite side to cause contamination.

Therefore, as a solution to this problem, the following methods a to c are known, in which a coating film is provided to form an impermeable layer or the like.

a. A cosmetic puff applicator comprising an elastic sheet and a porous layer such as a thin wet-foamed urethane layer having a wet-formed surface layer, the porous layer being formed on the elastic sheet through a hot-melt resin film. Specifically, the puff for cosmetics is obtained by using a porous layer formed by a solution coating method on a woven fabric (Nylon Tricot Half) with a wet foamed urethane sheet having a thickness of 0.4 to 0.8mm, or a porous layer formed by a wet method by coating a release paper with a urethane resin, and thermally fusing an elastic sheet with a hot-fusible resin film having a thickness of 30 to 70 μm to form the puff for cosmetics. (see patent document 1).

b. A cosmetic sponge puff which is a method for adjusting the impregnation amount of a non-skin film, wherein a mesh pattern having a width of 1mm and an interval of 3mm is thermally compressed on one surface of an open cell sponge so that cells are partially clogged. (see patent document 2).

c. A cosmetic puff in which an application part sponge and a base material sponge are joined to each other via an impermeable layer, a coating film is provided by the joining, and the application part sponge is hot-pressed with an uneven pattern to adjust the amount of penetration (see patent document 3). In this example, NBR sponge having a thickness of 8mm was used as the base material sponge, the surface layer was used as the impermeable layer, an open-cell urethane sponge sheet was provided thereon as the coating portion sponge, and the coating portion sponge was subjected to thermocompression with a metal mold to compress the uneven pattern to a thickness of 0.5 mm.

Documents of the prior art

Patent document

Patent document 1 Japanese Kokai publication Sho 55-095611

Patent document 2 Japanese patent application laid-open No. H09-164017

Japanese patent application laid-open No. 2005-118433 of patent document 3

Disclosure of Invention

The porous surface of the cosmetic puff of the above a has a surface layer on the surface, and the surface layer has a dense layer because the foaming density is different between the surface and the inside, so that the cosmetic supplied to the surface of the cosmetic puff is mainly present on the surface layer, and is not impregnated in a large amount in the inside. Thus, the porous layer cannot be said to be particularly effective for impregnation and application of cosmetics. Further, since the cosmetic puff is not a cut sheet but a film made of a generally used hot-melt resin, a film adhering to the shape of the concave portion cannot be obtained.

Further, it cannot be said that the surface of the elastic sheet on which the porous body is located can be coated with the hot-melt resin in accordance with the shape of the inner surface of the concave portion.

Therefore, since the porous layer of such a cosmetic puff does not contain the cosmetic, the entire amount of the cosmetic puff adheres to the skin immediately after the start of application, and the cosmetic is gradually supplied to the skin by a force or the like applied during application, and it is difficult to achieve the intention of the user or achieve a uniform application amount.

The cosmetic sponge puff of the above b has a hard texture due to the air bubbles being blocked by the thermal compression of the mesh pattern on the sponge. Further, since the non-permeable layer is not provided on the back surface or the like, the cosmetic penetrated from the surface has a problem of bleeding from the side surface and the back surface, and therefore, the technique is not practical as compared with the technique of forming a film.

The cosmetic puff of c above is provided with an impermeable layer, and the porous layer having the uneven pattern is provided by a method such as bonding a porous sheet through the impermeable layer. However, since the impermeable layer is a surface layer of the cosmetic puff body and does not cover the surface of the recessed portion of the porous application layer in contact therewith, and the gap between the surface film of the porous application layer and the sponge does not disappear by the hot pressing of the uneven pattern, the cosmetic impregnated with the puff reaches the surface layer and fills the recessed portion when used.

As described above, as described in patent documents 1 and 3, it is known that an applicator for controlling the amount of a cosmetic product to be impregnated is provided with a coating film on an open-cell sponge. However, when the open cell sponge is sliced, a concave portion formed by combining concave portions, which is larger in size than the foam formed by catching the open cell foam with a cutting blade when the open cell foam is cut, and a concave portion having a foam cell size from the cell cross section of the open cell sponge are present on the surface of the open cell sponge, and when the film is simply bonded to the open cell sponge, a void is generated from the concave portion formed by combining the sliced surface and the film. The voids are larger than the bubbles in the sponge.

Since the gap excessively sucks the cosmetic when the puff is used, even after the cosmetic is released from the puff and the application is completed, the cosmetic remains in the recessed portion formed by the combination of the puff and the cosmetic. And relatively flat portions such as the cheek and forehead and relatively convex portions such as the jaw and nose, the convex position is suitable for more cosmetics since the pressure applied to the puff contact surface at the convex portion is greater even if the same force is applied to the puff by hand due to the different shapes of the face surfaces.

In this way, it has been difficult to uniformly apply the cosmetic, and the cosmetic may be applied too much depending on the body part.

Further, when the puff after use is washed, a lot of cosmetic remains on the puff, and it takes much time and effort to wash, and if the impregnated cosmetic is dried without washing in time, the more cosmetic remains on the puff, the greater the degree of hardening of the puff due to the dried material on the cosmetic is, and the usability thereof is further deteriorated thereafter.

Further, the noise may be generated during use, and wrinkles may be generated during use.

The present invention solves the above problems caused by the formation of a coating film, and provides a cosmetic applicator having a coating film in which the amount of impregnation can be arbitrarily adjusted.

A makeup applicator comprising a cut piece formed by cutting an open cell sponge, one surface of the cut piece having a concave portion formed by roughening the surface by a cutting blade and a concave portion formed by cutting the original cells of the open cell sponge, a skin film layer formed by thermal transfer in accordance with the shape of the concave portion formed by combining the 2 concave portions, the surface on the side where the skin film layer of the cut piece is formed being bonded to a base material [ claim 1], the thickness of the cut piece layer being 0.2 to 2.0mm [ claim 2], the skin film layer being formed by thermal transfer [ claim 3], the skin film layer formed by thermal transfer being a polyester urethane resin having a tensile failure stress of 45 to 60MPa and a tensile failure strain of 500 to 700%, the thickness being 2 to 50 μm, the skin film layer being bonded in accordance with the shape of the concave portion formed by combining the 2 concave portions [ claim 4], the film may contain an antibacterial agent [ embodiment 5], the surface of the cut film on which the film is formed may be bonded to a base material, one or both surfaces of the base material may have a coating portion formed by a cutting surface facing the surface on which the film is formed or the surface of the cut film on which the film is formed may be bonded to the base material, the base material may be included in a part of a support device, and the entire surface of the part of the support device may have the coating portion formed by the cut surface [ embodiments 6 to 8 ].

The sliced surface was flat only with the naked eye, but there were wavy recesses as shown in fig. 5. The concave portion shape is generated by the cutting blade during cutting, and the diameter and depth of the concave portion are different depending on the shape, specification, and cutting condition of the cutting blade, but are significantly larger than the diameter and depth of the concave portion generated by cutting the original bubble of the slice.

In addition to such recesses, there are also smaller recesses formed by cutting the cells originally present in the continuous foam, and in the present invention, there are recesses formed by combining these 2 types of recesses on the cut piece surface.

The surface of the continuous bubble body on which the film is provided is brought into close contact with the inner surface of the recess formed by the cutting to form the film.

As a result, the cosmetic or the like is impregnated with the application surface, which is the surface of the cut piece, during use, and the cosmetic or the like impregnated in the open cells penetrates into the deep part of the cut piece.

At this time, although the impregnated cosmetic or the like also penetrates the open cells, the coating film formed in the recessed portion is formed so as to block the passage between the open cells extending from the cut piece surface and the cosmetic or the like connected to the recessed portion, and therefore, the coating film does not reach the recessed portion, does not fill the recessed portion, and is not excessively impregnated.

Therefore, when a user applies cosmetics or the like, the cosmetics supplied from the applicator can be applied to the skin or the like a small amount at a time, and thus a desired amount can be applied uniformly regardless of the location without slipping. Furthermore, since no cosmetic or the like remains in the recessed portion after use, the recessed portion can be easily cleaned, and the cosmetic applicator can be prevented from being hardened by drying the remaining cosmetic or the like even when the cleaning is not performed. Further, it is possible to prevent the generation of a noise during use due to the residual cosmetics or the like in the concave portion, and to prevent the generation of wrinkles in the cut piece due to the presence of the concave portion, thereby improving the feeling of use.

Drawings

Fig. 1 is a process diagram of a puff manufactured by disposing a coating layer on a cut sheet layer and laminating it on a substrate.

FIG. 2 is a view showing a cosmetic stick made of the cosmetic applicator of the present invention.

Fig. 3 shows a cosmetic applicator provided with a grip.

Fig. 4 shows a cosmetic applicator provided with a grip.

Fig. 5 is a photograph of the surface of the coating film, a cut sheet, and a photograph of a cross section of the coating film layer obtained in example 1.

Fig. 6 is a cross-sectional photograph of the cut piece and the membranous layer obtained in comparative example 1.

Description of the symbols

1-slicing; 2-a skin membrane layer; 3-a substrate; 4-a support means; 5-a core; 6-a holding part.

Detailed Description

(slice layer)

In the present invention, as the sponge used as the material of the slice layer, known sponges such as a sponge made of NBR or NR latex according to the DUNLOP (DUNLOP) method, a sponge made of wet foaming of polyurethane, and a sponge formed by processing closed cells of polyurethane can be used. The properties of the sponge such as the foaming ratio can be adjusted at will, and the soaking amount on the slice layer can also be adjusted by adjusting the foaming ratio.

The sponge is cut with a cutting blade to a thickness of 0.2 to 2.0mm, more preferably 0.2 to 1.0mm, to obtain a cut sheet layer having both sides cut. The cutting is performed for the purpose of removing a dense layer existing on the surface of the sponge, that is, removing a surface layer, and adjusting the thickness to adjust the amount of the cosmetic or the like to be impregnated at the time of use. It is difficult to make the thickness of the sliced layer smaller than 0.2mm, but it is not preferable because the thickness of the sliced layer is not smaller than 2.0mm because the adjustment of the impregnation amount is not useful. Further, if the air bubbles are not continuous, it is difficult to sufficiently impregnate and hold the cosmetic or the like.

When the bubbles of the open-cell sponge are cut by the cutting blade as described above, the surface of the cut piece has large irregularities due to the wall surface of the bubble caught by the blade, and the irregularities are larger than those due to the bubbles of the sponge.

(thermal transfer sheet)

The thermal transfer sheet is a material for providing a thermal transfer layer as a skin layer on one surface of the cut sheet layer, the skin layer being a layer that prevents cosmetics and the like from permeating to the maximum.

The thermal transfer sheet is a sheet in which a heat-resistant resin film such as PET is used as a base film, and a release layer and a thermal transfer resin layer are formed in this order on one side of the base film.

The heat-resistant resin film preferably has a thickness of 20 to 30 μm because of the necessity of flexibility, and the release layer is a layer for separating the base film and the thermal transfer layer at the time of thermal transfer and peeling the thermal transfer layer from the base film.

The release layer is heated and melted to reduce the adhesive force between the base layer and the thermal transfer layer, and thus the thermal transfer layer can be easily peeled.

The release layer may be one that liquefies during thermal transfer to provide a soft elasticity, and for example, it is necessary to have a soft elasticity in which the film is made of a solid low-melting polymer at room temperature and is brought into close contact with the irregularities present on the surface of the cut piece by a liquid formed by the heat during thermal transfer. By this action, the irregularities, particularly the skin layer of the recesses can be thickened, and the depth of the recesses can be reduced.

Examples of the release agent include a low-density polyethylene resin having a melting point of 60 to 100 ℃, for example, UBE (registered trademark) polyethylene UM8928 having a melting point of 69 ℃, UBE (registered trademark) polyethylene UM8420 having a melting point of 94 ℃, and products of yushu pill-polyethylene co. The thickness of the release layer is preferably 25 to 40 μm.

In addition, in the case where a coating film is not formed on the thermal transfer layer so as to be in close contact with the concave portions of the irregularities on the surface of the cut piece, the continuous bubbles communicate with the concave portions, and thus a defect is caused from the concave portions, that is, a defect is caused in which the space formed by the concave portions communicates with the continuous bubbles in the cut piece, and the continuous bubbles excessively fill the impregnated cosmetic in the space formed by the concave portions, and thus the concave portions have a defect such as a cosmetic remaining in the concave portions after the excessive application or use. However, according to the present invention, when a film is formed in close contact with the concave portion having the concave and convex shapes so that the open cells do not communicate with the concave portion, the concave portion is not excessively filled with the cosmetic or the like, and this problem can be solved.

(tunica mucosa layer)

As described above, since the coating layer functions by being in close contact with the shape of the concave portion existing on the surface of the cut piece, the coating layer existing in the concave portion is formed to have a relatively small thickness, and the coating layer existing in the convex portion is formed to be relatively thin. The thickness of the skin layer is 2 to 50 μm, more preferably 2 to 20 μm, but the thickness is an average thickness and is the same as the thickness when the release layer before thermal transfer printing is formed on the base film.

Further, since the coating layer is formed so as to be in close contact with the shape of the recess, the passage communicating with the cut piece is buried in the recess, and the passage does not communicate with the bubble. In addition, when the cosmetic applicator is used, the cosmetic or the like impregnated into the surface layer formed by the cut piece does not reach the concave portion, and therefore, the cosmetic or the like does not stay in the concave portion, and the impregnated amount determined by the thickness of the cut piece and the predetermined application amount can be applied accurately. At the same time, the cosmetic applicator can be prevented from absorbing excessive cosmetic, and from generating noise during use and from generating wrinkles on the application surface with use.

As a component of the film as the thermal transfer layer provided on the release layer, an impermeable film is formed by being in close contact with the irregularities. The soft resin coating component is preferably a polyester urethane resin having a tensile breaking force of 45 to 60MPa and a tensile breaking strain of 500 to 700%. More preferably, the tensile failure force is 48 to 53MPa, and still more preferably, the tensile failure strain is 550 to 650%. When the range of the tensile breaking force and the tensile breaking strain is smaller than this range, the coating film is easily broken, and when it is larger, the adhesiveness is poor, and the coating film cannot be completely adhered to and covered on the concave portion of the cut piece. In order to form a thermal transfer layer having a thickness of 2 to 50 μm formed of the polyester urethane, the resin is dissolved in a solvent and applied to the surface of a release layer on a base sheet.

In addition, there are resident bacteria and the like on the skin that adhere to the cosmetic applicator used once. For example, when an aqueous cosmetic or the like is applied to a cosmetic applicator, the cosmetic applicator may generate a smell due to the proliferation of resident bacteria or the like. In addition, when the cosmetic applicator containing water is washed after use, the water may also cause an odor due to the proliferation of aquatic bacteria and the like present in the water. However, if the skin layer contains an antibacterial agent, the antibacterial agent gradually diffuses into the cosmetic applicator, and the antibacterial agent can prevent the growth of resident bacteria, aquatic bacteria, and the like, and can sterilize them, thereby preventing the generation of odor.

As the antibacterial agent that can be used for this purpose, known antibacterial agents such as silver-based antibacterial agents such as silver zeolite and silver-containing glass, and antibacterial agents that can be used for cosmetics can be arbitrarily selected and used. Among them, silver-based antibacterial agents are preferred from the viewpoint of safety to the human body, such as antibacterial properties, chemical stability, and no irritation to the skin.

In this way, it is necessary to add an antibacterial agent to the skin layer from the viewpoint of preventing generation of odor. If an antibacterial agent is added to the sponge layer, the sponge is a vulcanized foam, the antibacterial agent reacts with the sulfur compound and loses antibacterial activity, and even if an antibacterial agent is added to the foam obtained by a wet method, for example, a silver-containing antibacterial agent is eluted simultaneously with soluble particles eluted by forming bubbles in a liquid, and therefore, the antibacterial agent does not remain in the sponge layer, and thus the antibacterial activity cannot be exerted.

In addition, known additives for resins such as perfumes, colorants, and fillers may be optionally contained in the coating layer, and when a colorant is used, the color may be changed depending on the surface of the cosmetic applicator, or a pattern may be drawn on the surface of the cosmetic applicator.

(thermal transfer method)

In the present invention, a thermal transfer method may be used to form a coating film on one surface of the cut sheet, and as the thermal transfer method, there are a continuous transfer method and an intermittent transfer method.

In any of these methods, it is necessary to soften the surface of the cut sheet by heating to such an extent that the concave shape of the surface of the cut sheet can be covered with the coating layer, or to heat the release agent layer, which functions by heating, to a temperature at which the function can be exhibited.

In the continuous transfer method, for example, the thermal transfer sheet in a web form is superposed on the cut piece in a web form, and the resultant is subjected to a calendering treatment by continuous hot pressing under a temperature condition that the speed is 15mm/Sec and the surface temperature of the roll is 180 ℃.

In the intermittent transfer method, when the cut sheet and the thermal transfer sheet are stacked and hot-pressed at a temperature of 150 ℃ for 4 to 5 seconds, the film in the shape of the concave portion can be transferred while being in close contact with the concave-convex portion.

(applicator for cosmetic)

The cosmetic applicator of the present invention refers to a puff, a cosmetic stick (tip), and the like, and the applicator is applied to a target part of the body by impregnating a cosmetic with the cosmetic from an application surface of the puff, the cosmetic stick, and the like. Of course, a cosmetic applicator other than a puff or a cosmetic stick may be used as long as the structure of the present invention is provided. The size, shape, and structure of the hand-held portion of the puff, stick, or other cosmetic applicator can be any known.

The cosmetic applicator is formed by joining a skin layer provided on one surface of the cut piece to the surface of the base material. Specifically, a coating layer is laminated on the surface of a substrate having a size usable as a puff, a cosmetic stick, or the like, and the cut piece is exposed on the surface. As the laminating method, a method of bonding or welding using a known adhesive such as olefin, rubber, or acrylic can be used. When the skin layer is thermally transferred, when the lamination is performed with a part of the release agent layer remaining on the skin layer, it is necessary to select, for example, an adhesive that does not adversely affect the adhesion.

The coating film of the thermal transfer layer provided on the release layer is a component which adheres to the irregularities of the cut piece to form an impermeable coating film. As the soft resin coating component, the polyester urethane resin having a tensile breaking force of 45 to 60MPa and a tensile breaking strain of 500 to 700% as described above is preferable. When the tensile breaking force and tensile breaking strain are smaller than the above ranges, the film is easily broken, and when the tensile breaking force and tensile breaking strain are larger than the above ranges, the adhesiveness is poor, and the concave shape of the sliced piece cannot be entirely covered. The resin is dissolved in a solvent and applied to form a thermal transfer layer having a thickness of 2 to 50 μm made of the polyester urethane.

As a cosmetic applicator, the following cosmetic applicators can be used: (1) a makeup applicator for foundation in which a film-formed surface is joined to a base material and a cut surface opposite to the joined surface is used as an application portion, and (2) a makeup stick in which a cut film surface is joined to both surfaces of a base material and the base material is enclosed in one end of a holder so that the cut surface can be used as an application portion.

The brush-like applicator may be an applicator having a grip portion made of a hard material such as resin, metal, or wood, and a base material having a surface on which a coating surface is formed is fixed.

The substrate may be selected from known antibacterial agents, perfumes, colorants, fillers, and the like, as in the case of the coating layer.

The invention is illustrated with reference to the accompanying drawings.

Fig. 1 (a) to (e) show the manufacturing process of the cosmetic applicator of the present invention.

(a) The section (c) shows a slit layer (1) obtained by cutting an open-cell sponge, and a coating layer (2) is provided thereon by thermal transfer printing.

The laminate (c) is formed by bonding the coating film layer of the laminate (c) to the surface of the base material 3 to form a puff or the like (d) having a coated surface on one side, and further bonding the laminate (c) formed by the chip layer 1 and the coating film layer 2 to the other side of the base material as necessary.

Further, FIG. 2 shows a cosmetic stick in which the above (c) is bonded to the surface of the conical base material 3 supported by the supporting tool 4.

Fig. 3 and 4 show a puff in a brush-like form, in which a flat-plate-shaped core 5 is connected to a grip portion 6 made of a hard material, a base material layer 3 is provided on the front and back surfaces of the core 5, and a chip layer 1 is formed on the surface of the base material layer through a film 2. When in use, the holding part 6 is gripped with fingers to impregnate the cut sheet layer 1 with the cosmetic, so that the fingers are not stained with the cosmetic or the like during use.

The cosmetic applicator of the present invention can be used as the following cosmetic applicators: (1) a makeup applicator for foundation in which a film-formed surface is joined to a base material and a cut surface opposite to the joined surface is used as an application portion, (2) a makeup applicator in which a cut film surface is joined to both surfaces of a base material and both surfaces have application portions, and (3) a makeup stick in which a cut film surface is joined to a base material and the base material is enclosed in a support device, whereby application portions can be formed on both surfaces of the support device. Examples of the base material include porous base materials such as NBR, NR, polyurethane sponge and nonwoven fabric, and non-porous base materials such as rubber and flexible resin molded bodies, and also include materials that are flexibly deformed in accordance with the surface of the skin and that can press the cut sheet layer on the surface against the surface of the skin.

Examples

The present invention is more specifically illustrated by examples, but the present invention is not limited to the examples.

The tensile breaking force in the present invention is measured according to JISK7161, and the tensile breaking strain is also measured according to JISK 7161. (JIS is Japanese Industrial Standard)

Example 1

(thermal transfer sheet)

A release layer of 30 μm, which was formed by dry-laminating a UBE (registered trademark) polyethylene UM8928 (product of Yu-Tanshan polyethylene Co., Ltd.) film of LDPE having a melting point of 69 ℃ as a soft elastic release layer, was provided on one surface of a PET film of 25 μm thickness. On the release layer, Vylon (registered trademark) UR-2300 (product of Toyo Boseki Kabushiki Kaisha) having a tensile breaking stress of 50MPa and a tensile breaking strain of 600% was dissolved in methyl ethyl ketone to form a 30% solution, and the solution was coated and dried to form a film having a thickness of 15 μm, thereby obtaining a thermal transfer sheet.

In comparative example 1, a film having a thickness of 15 μm was formed using Kuramiron (registered trademark) U8175 (product of Kuraray corporation) having a tensile failure stress of 42MPa and a tensile failure strain of 355%, in place of Vylon (registered trademark) UR-2300.

(formation of skin film by transfer)

As the cut pieces of the continuous bubble sponge, the polyurethane wet-foamed sponge was cut into 0.7 mm. The thermal transfer sheet was laminated on the cut sheet, and the sheet was pressed at 150 ℃ for 4 seconds to form a close-contact film having a thickness of 15 μm.

The cut piece having the film thus obtained was joined to a porous base material to produce the following cosmetic applicator.

(1) A cosmetic applicator was prepared by joining the film-forming surface of the cut piece to an NBR sponge having a thickness of 7mm as a porous base material.

(2) A cosmetic applicator was prepared by joining the film-forming surface of the cut piece to both surfaces of 7mm thick NBR sponge as a porous base material.

(3) A cosmetic stick was produced by joining an NBR sponge having a thickness of 1mm as a porous base material to the film-formed surface of the cut piece, joining the porous base material to an end of a support of the cosmetic stick having a length of 11mm, and using the surface of the cut piece as a coating portion.

(evaluation)

The residual amounts of the foundation solutions on the applied surfaces of the prepared products (1) and (2) were measured under the following measurement conditions, and the results are shown in table 1.

TABLE 1

Example 1 and comparative example 1 are applicators having a coating film cut to the same thickness, but the residual amount of the comparative example is large because the concave shape of the surface of the cut piece of the coating film forming surface is not sufficiently covered, and the impregnated cosmetic reaches the concave portion formed by the combination of the large concave portion formed when the other surface of the cut piece is cut and the concave portion formed when the air bubbles contained in the cut piece are cut. In the embodiment, since the concave portion is sufficiently covered, the foundation liquid can be effectively used, and the amount of the cosmetic remaining in the applicator after use can be reduced. In the conventional film formation, it was not possible to achieve a film thickness of less than 0.012ml/cm²The residual amount of (2), for example, as shown in comparative example 1, 0.058ml/cm²Such a large amount of cosmetics.

Measurement conditions of the amount of remaining cosmetic:

a piece of a 30 mm-diameter round applicator sample of a known weight was placed on the surface of the applicator sample, 0.8g of a liquid foundation was placed thereon, and the applicator sample was manually applied to the inside of the wrist. The residual amount of the foundation solution remaining on the applicator after application was determined from the obtained weight of the applicator before and after application by measuring the weight of the applicator after application.

Fig. 5 is a sectional view showing a state where a coating film is formed in close contact with the concave-convex portion in example 1.

(a) The photograph of the surface of the coating layer formed on one side of the cut piece confirmed that the irregularities formed on the surface by cutting remained. The bonding state between the skin layer and the cut piece is shown in (b) to (d). From these figures, it was confirmed that the concave portions of the whitish slice surface were in close contact with the black coat layer. The surface of the coating layer reflects the surface irregularities of the cut piece itself, and as shown in (a), the surface of the coating layer also has irregularities.

Fig. 6 shows the state of bonding between the surface of the cut piece and the skin layer obtained in comparative example 1, and a space is present in the concave portion of the cut piece under the black skin layer. Therefore, the surface of the coating layer is flat, and the surface of the coating layer is not formed into irregularities reflecting the irregularities on the surface of the sliced layer.

(evaluation of spreadability on skin)

In the evaluation of the use of the spread, according to the examples, the cosmetic was not excessively inhaled and the residual amount was made 0.012ml/cm². The residual amount of the cosmetic is small, even if the application force and the application position are different, the more uniform application can be performed, the cleaning and the removal of the residual cosmetic after the use are easy, and even if the cosmetic is dried without being cleaned after the use, the degree of hardening of the applicator due to the small amount of the cosmetic after the drying is small, and the usability is maintained at the next use. Further, the problem of the applicator having a coating film which does not generate sound or wrinkles when not used can be solved.

In comparative example to this, a residual amount of 0.058ml/cm remained²A large amount of cosmetic. There is still a problem of a coating device having a coating film which generates a sound when used or due to a gap or which generates wrinkles from a gap as a starting point.

Claims (8)

1. A makeup applicator characterized in that a cut piece formed by cutting an open cell sponge has a first surface formed into an application surface, a concave portion formed by cutting the open cell sponge and original cells of the open cell sponge are formed on the other surface of the cut piece, a skin layer is formed in close contact with the inner surface shape of the concave portion formed by combining the 2 kinds of concave portions, and the surface on the side where the skin layer of the cut piece is formed is joined to a base material.

2. The cosmetic applicator according to claim 1, wherein the thickness of the cut sheet layer is 0.2 to 2.0 mm.

3. A cosmetic applicator according to claim 1 or claim 2, wherein the skin layer is formed by thermal transfer printing.

4. A cosmetic applicator according to claim 3, wherein the skin layer formed by thermal transfer printing is a polyester urethane resin having a tensile failure stress of 45 to 60MPa and a tensile failure strain of 500 to 700%, has a thickness of 2 to 50 μm, and is adhered to the recesses formed by the combination of the 2 kinds of recesses.

5. The cosmetic applicator according to any one of claims 1 to 4, wherein the film contains an antibacterial agent.

6. A cosmetic applicator according to any one of claims 1 to 5, wherein the cut sheet has a film-forming surface joined to the base material, and one surface has an application portion formed by a cut surface facing the film-forming surface.

7. A cosmetic applicator according to any one of claims 1 to 5, wherein the 2-piece skin film forming surface of the cut piece is joined to both surfaces of the base material, and both surfaces have an application part formed by a cut surface.

8. The cosmetic applicator according to any one of claims 1 to 5, wherein the film-forming surface of the cut piece is joined to a base material included in a part of the support device, and the entire surface of the part of the support device has an applicator portion formed by the cut piece surface.