JP2006141979A - Cosmetic application wick - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cosmetic application wick which can apply application liquid of high viscosity such as ointment and jelly as well as liquid form of high viscosity more smoothly to a wetting application surface area from the start of application without giving the skin and lips unpleasant stimulus. <P>SOLUTION: In a cosmetic application wick 1 which consists of a porous body using thermoplastic products of a spatial network with open cells, a through-hole 3 penetrating into an application surface area 2 of a leading edge from a rear anchor in the porous body is provided. The through-hole 3 has a diameter suitable for letting application liquid of high viscosity in an axis line direction and is formed in the state of communication by exposing the cells to the application surface area 2 and the through-hole 3. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an application core for various cosmetics in the form of liquids such as lipsticks, blushers, nail polish, lip balm, and other liquids, ointments, or jellys.

Various attempts have been made to apply the tip of the applicator with a cosmetic viscous coating liquid in a container, but even if it can be applied relatively easily and cleanly by applying the application surface to the skin or lips. There were still many problems in applying without unpleasant irritation.
In order to solve such a problem, Patent Document 1 discloses a method in which a plurality of ultrafine crimped fibers are partially joined with a polyurethane synthetic resin and a highly viscous coating liquid is caused to flow along the longitudinal direction of the center thereof. A single coating through-hole having a suitable diameter is disclosed. This is not a problem when a highly viscous coating liquid is easily poured or exuded from the coating core, but in fact, the fibers are partially bonded with polyurethane synthetic resin, so the skin, especially irritation Unpleasant irritation is strongly felt in the lips sensitive to the skin. In addition, when the application surface is slanted, a sharp tip shape is formed by the cutting or grinding process, so that the edge portion remains and further gives an unpleasant stimulus to the skin and lips. There is a problem.
Japanese Utility Model Publication No. 3-41607

  The problem to be solved is that, firstly, a highly viscous liquid such as an ointment or jelly is not given unpleasant irritation to the skin and lips, as well as a highly viscous liquid. A cosmetic coating core that can be applied smoothly from the beginning of application by the application surface portion rich in wettability, and secondly, a cosmetic coating core that can be applied by controlling the extrusion amount of the coating liquid to an appropriate amount. 3 is a cosmetic coating core having a structure that is easy to mold, and fourth is a cosmetic coating core that is easy to apply with high fluidity of the coating liquid on the coating surface, and fifth, An object of the present invention is to provide a cosmetic coating core that has a high coating liquid supply capability and can be stably supplied to various portions of the coating surface.

In order to achieve the above-mentioned problems, the present invention is characterized by the following configuration.
1. In a cosmetic coating core made of a porous body using a three-dimensional network thermoplastic product having continuous pores, a through-type through-hole is formed from the base end portion to the tip coating surface portion of the porous body. The through hole has a diameter suitable for flowing a highly viscous coating liquid in the axial direction, and is formed in a continuous shape by exposing the pores to the coating surface portion and the through hole.
2. In 1 described above, the porosity due to the pores may flow slightly to the extent that the coating solution stays in the pores when a force for pushing out a highly viscous coating solution from the opening of the through hole in the coating surface portion is loaded. It is formed to the extent.
3. In 1 or 2 described above, the through hole is composed of a thin short small through hole on the application surface side and a thick long long through hole in communication with the small through hole.
4). In any one of 1 to 3 described above, a groove portion extending between a plurality of openings is provided on the coating surface portion.
5). In any one of 1 to 4 described above, the plurality of openings in the application surface portion and the through holes communicating with the respective openings are mutually connected via a slit-like communication portion that extends shallowly from the application surface portion toward the base end side. It is characterized by communication.

The highly viscous coating liquid in the present invention refers to creams such as lip balm, ointments such as petrolatum, jelly, and the like.
The porous body consists of a thermoplastic product (polyolefin foam) having a three-dimensional network structure having continuous pores in communication with each other and having a shape retaining property as a core while having appropriate flexibility. For example, a porous body formed by a sintering method in which each granular particle made of a thermoplastic resin is partially fused to each other and continuous continuous pores are formed between the granular particles. It may be an embodiment in which a fine powdery inorganic compound that is dissolved in an acid is mixed with a thermoplastic resin, and the inorganic compound is eluted with an acid after molding to form pores in the elution trace. The aspect which is a porous body shape | molded by a method may be sufficient.

The porosity of the coating core made of a porous material is adjusted to 10 to 80% from the extent that the coating liquid stays in the pores when the force for extruding the high-viscosity fluid from the opening is applied to the extent that it can flow slightly. It is preferable to do. When the porosity is less than 10%, the flow rate of the coating liquid with high cosmetic viscosity is insufficient, and since the amount of the filler is small and the amount of elution is small, the unevenness of the surface of the polyolefin resin is reduced. An increase in the contact area with the skin gives discomfort to the skin and lips. In addition, when the porosity exceeds 80%, the supply becomes excessive, the softness is too soft, and the durability during use is inferior.
Examples of the thermoplastic resin include polyethylene resin, chlorinated polyethylene resin, and ethylene-vinyl acetate copolymer resin. In order to form a coating core rich in flexibility, a plurality of combinations of polyethylene resin, ethylene-vinyl acetate copolymer resin and the thermoplastic resin can be used, and the hardness thereof can be JIS-A hardness 30 or more to JIS-D. It is desirable to use a resin having a hardness of 60 or less. Those having a JIS-A hardness of less than 30 are too soft and lose their waist, and those having a JIS-D hardness of more than 60 are too hard and give unpleasant irritation to the skin and lips.

The coating core may have a round bar shape, a square bar shape, or any other appropriate shape, and the coating surface portion of the coating core may have any known shape such as a brush shape, a nail shape, or a chisel shape. The base end shape is appropriately configured in a known shape such as straight or stepped depending on the configuration of the main body through which the coating liquid having high viscosity is directly passed from the reservoir tank or the like.
This application surface portion has a mode in which only one or a plurality of through-hole openings are opened, and a groove portion extending between some or all of the openings is provided. May be.
A through-hole is a thing of the aspect which consists of a thin short small through-hole extended to the middle toward the base end side from the opening part of an application surface part, and the thick long long through-hole at the base end side connected with the said small through-hole. There may be. When there are a plurality of through-holes, some of the through-holes may communicate with each other via a slit-shaped connecting portion that extends shallowly from the application surface portion toward the base end, or all the through-holes communicate with each other. The aspect may be sufficient.
The shape of the through hole is not particularly limited, and it may be a straight shape in which holes of the same diameter are formed in the axial direction, a tapered shape in which the hole diameters at one end side and the other end side are different, or a large and small hole diameter. A combination may be used, and it is appropriately formed depending on the configuration of the main body through which the coating liquid having a high viscosity is directly passed from the reservoir tank or the like and the viscosity of the coating liquid. The cross-sectional shape of the through hole may be any of a circular shape, an elliptical shape, a polygonal shape, and the like. Moreover, the hole diameter of a through-hole is determined by the viscosity of a coating liquid with high viscosity, and the diameter becomes large, so that a viscosity is high.
The application surface portion, the through hole, the groove portion, and the connecting portion are preferably formed in a state where the pores are exposed and communicated with each of these surfaces.

  When the coating core is a porous body made of a polyolefin foam in which thermoplastic resin particles are partially fused to form pores between the particles, the particles form a porosity of 10 to 80%. It is sufficient if it is possible, and examples include powders having a particle size of 50 mesh or less. In the above process, the coating feeling and porosity can be adjusted by resin hardness, particle diameter, etc., and since it is a sintering method using a mold, chamfering etc. of the coated surface is easy, and there are various types depending on the purpose. An application core can be obtained.

When the coating core is a porous body made of a polyolefin foam in which pores are formed in the elution trace of the inorganic compound by the acid, the acid-soluble filler includes calcium carbonate, magnesium carbonate, calcium hydroxide, magnesium hydroxide. In addition to the above, a finely divided inorganic compound that dissolves in an acid can be used. The filler is particularly important in forming fine continuous pores having a three-dimensional network structure, and carbonates carry out impurities in the pores and uneluting fillers to the outside by bubbles generated when leaching with an acid. Therefore, it is particularly preferable. The most preferred acid soluble filler is finely divided calcium carbonate or magnesium carbonate. The acid used for elution of the acid-soluble filler may be any acid that can elute the filler such as hydrochloric acid and nitric acid. Usually hydrochloric acid is used.
Solvents are useful to obtain foams with continuous pores and to aid resin flow. A preferred solvent is a solvent having a high boiling point and a small amount that improves the fluidity of the resin and has a small loss of heat. Materials that are highly vaporized in the raw material kneading process and the molding process are inappropriate. Specifically, polyoxyalkylene glycols and cellosolves are suitable. In addition, higher alcohols and ketones having a relatively high boiling point are also useful. Furthermore, other appropriate additives such as antioxidants, lubricants, dispersants and the like may be blended.
In the above process, the coating feel and porosity can be adjusted by the resin hardness and the ratio of the acid-soluble filler amount, etc., and because of injection molding using a mold, chamfering of the coated surface is easy, etc. Various coating cores can be obtained.

A. According to the first aspect, not only a liquid with high viscosity but also a highly viscous coating liquid such as an ointment or jelly can be extruded from the through hole to the application surface portion, and the application surface portion and the through hole are applied to the application surface. Since the pores are exposed and communicated with the surface portion and the through-hole surface, it is rich in wettability, so that the flow of the coating liquid in the through-hole is smooth and it is applied without giving unpleasant stimulation to the skin and lips. It can be applied smoothly from the beginning.
Therefore, it is suitable for applying an ointment or a jelly-like coating liquid.
B. According to the second aspect of the present invention, the coating liquid can be applied while being controlled to an appropriate amount.
C. Further, according to the third aspect, since the through hole is formed by a thin short small through hole on the coating surface side and a thick long long through hole on the base end side, it is easy to form structurally.
D. According to the fourth aspect, the fluidity of the coating liquid on the coated surface portion is high and the coating is easy to apply.
E. According to the fifth aspect of the present invention, it is possible to stably supply a coating liquid with high supply capability to various portions of the coating surface.

FIG. 1 illustrates an embodiment of a cosmetic coating core according to the present invention. The coating core 1 is made of a porous body using a polyolefin-based foam having fine continuous pores having a three-dimensional network structure by an elution method. A single coating through-hole 3 having a diameter suitable for flowing a highly viscous coating liquid from the base end portion 1a to the coating surface portion 2 of the distal end portion 1b is formed in the porous body in the axial direction.
The application surface portion 2 is formed in a nail shape, and an opening 3 a of the through hole 3 is opened at substantially the center of the application surface portion 2. The through hole 3 is formed in a tapered hole shape having a small diameter as it reaches the opening 3a.
The pores are exposed on the coating surface portion 2 and the through-hole 3 hole surface, and are formed in a continuous shape. The porosity of the pores is 10 to 80%, and the coating liquid stays in the pores when a force for extruding a highly viscous coating liquid from the opening 3a of the through hole 3 in the coating surface portion 2 is applied. It is formed to such an extent that it can flow.
As a result, since the coating core 1 is made of a porous material, it is highly flexible, adheres well to the skin and lips that are the coated surface, and conforms to the coating surface. Since the fine continuous pores communicate with the coating surface portion 2 and the wall surface around the through-hole 3 through the through-hole 3 having a diameter suitable for the coating surface, the coating surface portion at the tip is provided. The coating liquid can be sent to 2 and the wettability is maintained and the coating liquid can be smoothly applied.

2 and 3 illustrate another embodiment of the cosmetic core according to the present invention, and the configuration is basically the same as that of the above-described embodiment of FIG. The description of the configuration will be omitted by applying the same reference numerals, and a different configuration will be described.
The through holes 3 are formed in a total of six on and around the axis, and the openings 3a of the respective through holes 3 are dispersed and opened on the application surface portion 2.
As a result, the coating liquid is further sent out from each of the dispersed openings 3a in the application surface portion 2, so that the entire surface of the application surface portion 2 can be applied.

FIG. 4 illustrates another embodiment of the cosmetic coating core according to the present invention. The coating core 10 is formed by sintering, and the granular particles are partially fused with each other. A porous body made of a polyolefin-based foam having continuous pores communicating with each other between granular particles. The porous body is highly viscous from the base end portion 10a to the coating surface portion 11 of the tip end portion 10b in the axial direction. A single coating through hole 12 having a diameter suitable for flowing the coating liquid is formed.
The application surface portion 11 is formed in a nail shape, and an opening portion 12 a of the through hole 12 is opened at substantially the center of the application surface portion 11. The through hole 12 is formed in a tapered hole shape having a small diameter as it reaches the opening 12a.
Pores are exposed on the coating surface portion 11 and the through-hole 12 surface, and are formed in a continuous shape. The porosity of the pores is 10 to 80%, and the coating liquid stays in the pores when a force for pushing out the highly viscous coating liquid from the opening 12a of the through hole 12 in the coating surface portion 11 is applied. It is formed to such an extent that it can flow.
As a result, since the coating core 10 is made of a porous material, it is highly flexible, adheres well to the skin and lips that are the coated surface, and conforms to the coating surface. Since the fine continuous pores communicate with the coating surface portion 11 and the wall surface around the through hole 12, the coating surface portion at the tip can be spread uniformly on a desired coating surface through the through hole 12 having a diameter suitable for The coating liquid can be sent to No. 11 and the wettability is maintained to smoothly apply the coating liquid.

FIG. 5 and FIG. 6 illustrate another embodiment of the cosmetic coating core of the present invention, and the configuration is basically the same as that of the above-described embodiment of FIG. The description of the configuration will be omitted by applying the same reference numerals, and a different configuration will be described.
The through-holes 12 are formed in a total of six on and around the axial center, and openings 12 a of the respective through-holes 12 are dispersed and opened on the application surface portion 11.
Thereby, since the coating liquid is further sent out from each of the dispersed openings 12a in the application surface portion 11, the entire surface of the application surface portion 11 can be applied.

FIGS. 7 to 10 illustrate other forms of the application surface portion in the cosmetic application core of the present invention. In the application surface portions 2 and 11 illustrated in FIGS. Grooves 4 are respectively disposed between the portions 3a and 12a and the surrounding openings 3a and 12a. On the surface of the radial groove portion 4, pores are exposed to form a continuous shape. Thereby, it is easy to apply by further improving the flow of the coating liquid on the application surface portions 2 and 11.
In the application surface portions 2 and 11 illustrated in (a) and (b) of FIG. 8, the central and peripheral openings 3 a and 12 a and the through holes 3 and 12 communicating with the openings 3 a and 12 a include It forms so that it may mutually communicate through the slit-shaped connection part 5 extended shallowly toward the base end side from the application surface parts 2 and 11. FIG. On the surface of the radial slit-shaped connecting portion 5, pores are exposed to form a continuous shape. Thereby, the supply capability of the coating liquid can be further stably supplied to each of the application surface portions 2 and 11.
In the application surface portions 2 and 11 illustrated in FIGS. 9A and 9B, the groove portions 4 are disposed between the surrounding openings 3a and 12a, and the surrounding openings 3a and 12a The through-holes 3 and 12 communicating with the openings 3a and 12a are formed so as to communicate with each other via a slit-shaped connecting portion 5 that extends shallowly from the coating surface portions 2 and 11 toward the base end side. . The annular groove portion 4 surface and the radial slit-shaped connecting portion 5 surface are respectively formed in a continuous manner by exposing pores. As a result, the flow of the coating liquid on the application surface portions 2 and 11 is improved, so that the application can be easily performed.
The application surface portion 13 illustrated in FIG. 10 is formed into a chisel shape, and the through holes 3 and 12 have a total of five on and around the shaft center, and three openings 3a and 3a on the flat portion 13a at the tip. 12a, each one opening 3a, 12a is each opened in both slope part 13b. Thereby, it can apply | coat to an appropriate width | variety further using the flat part 13a in the application surface part 13, or the slope part 13b.

FIG. 11 illustrates another form of the through hole in the cosmetic coating core of the present invention. In the through holes 3 and 12 illustrated in FIG. It is formed by narrow and short small through holes 3b and 12b and one large and long large through hole 3c and 12c on the base end side communicating with all the small through holes 3b and 12b. As a result, the thin small through-holes 3b, 12b are short, and the large large through-holes 3c, 12c on the base end side communicating with all the small through-holes 3b, 12b are long, so that it is easy to form structurally. .
In the through-holes 3 and 12 illustrated in FIG. 11B, six thin and short small through-holes 3b and 12b on the application surface portions 2 and 11 side, and one large and long large through-hole 3c on the base end side. 12c is formed to communicate with each other through small through holes 3b and 12b on the axial center, and each of the central and peripheral openings 3a and 12a and the small through holes communicated with the openings 3a and 12a. The holes 3b and 12b are formed so as to communicate with each other through a slit-like connecting portion 5 that extends shallowly from the coating surface portions 2 and 11 toward the base end side. As a result, the thin small through-holes 3b, 12b are short, and the large large through-holes 3c, 12c on the base end side communicating with all the small through-holes 3b, 12b are long, so that it is easy to form structurally. .

  FIG. 12 illustrates a stick-shaped lip marker assembled with the above-described coating core of FIG. 4 according to the present invention. By rotating the knob 21 at the rear end of the shaft cylinder 20, the coating surface portion 11 in the coating core 10 is illustrated. An appropriate amount of lip balm can be extruded and applied to the surface to be coated such as skin and lips.

  Next, a manufacturing example of the coating core will be described. As a method of obtaining the coating core illustrated in FIG. 1, an acid-soluble filler, an appropriate solvent and other additives are added to a polyolefin resin, kneaded with a kneader, etc., and then processed into a pellet by an extruder to form an injection molding machine. Examples include a method of forming a coated core made of a porous material by supplying, molding into a desired shape with a desired mold, and further eluting the filler using an acid.

  An example is given below. First, 120 parts of cyclohexane in which 10 parts by weight of an antioxidant is dissolved, 80 parts by weight of ethanol in which 50 parts by weight of a foaming agent are dissolved, 150 parts by weight of glycerin, 80 parts by weight of 2-ethyl-1,3-hexanediol are mixed. And completely dissolved. Subsequently, the obtained solution, 500 parts by weight of polyethylene resin, and 200 parts by weight of calcium bicarbonate 200 # 1000 were put into a kneader barrel, heated and kneaded at 180 ° C., and kneaded in 15 to 25 minutes. Thus, the obtained kneaded material is taken out from the barrel, cooled and pulverized, processed into a pellet through a kneader, and subjected to injection molding with a mold having a through-hole space to obtain a coated core having a through-hole. It was. The coated core thus obtained was put into a solution obtained by adding 0.05 part by weight of a nonionic surfactant to an aqueous solution of about 80 parts by weight of hydrochloric acid, and calcium carbonate was eluted for about 8 hours. Subsequently, washing with water was repeated until the pH of the washing water did not drop below 5. Subsequently, after neutralizing by adding a small amount of dilute ammonia water, it was dried to produce a coating core 1 having a porosity of 70% and having through-holes 3.

As a method for obtaining the coated core illustrated in FIG. 4, a powder composed of a polyolefin resin is put into a desired mold, compressed, and sintered at a temperature below the melting point of the powder to form a coated core composed of a porous body. The method of shaping | molding is mentioned.
An example is given below. A polyolefin resin powder (particle size: 100 mesh) having a melting point of 80 ° C. is placed in a mold having a through hole space, compressed, sintered at 150 ° C. for about 20 minutes, and a porosity of 56%. A coating core 10 having 12 was produced.

The perspective view which illustrates one form of implementation in the cosmetics application core of the present invention. The perspective view which illustrates one other form of implementation in the cosmetics application core of the present invention. FIG. The perspective view which illustrates one other form of implementation in the cosmetics application core of the present invention. The perspective view which illustrates one other form of implementation in the cosmetics application core of the present invention. FIG. (A) is the partial front view which illustrates the other form of the application surface part in the coating core for cosmetics of this invention, (b) is a partial longitudinal cross-sectional view. FIG. (A) is the partial front view which illustrates the other form of the application surface part in the coating core for cosmetics of this invention, (b) is a partial longitudinal cross-sectional view. (A) is the partial front view which illustrates the other form of the application surface part in the coating core for cosmetics of this invention, (b) is a partial longitudinal cross-sectional view. The fragmentary perspective view which illustrates the other form of the application surface part in the cosmetics coating core of this invention. (A)-(b) is each longitudinal cross-sectional view which has illustrated the other form of the through-hole in the cosmetics coating core of this invention. The use condition figure which assembled | attached the coating core of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,10 Application | coating core 1a, 10a Base end part 1b, 10b Tip part 2,11,13 Application | coating surface part 3,12 Through-hole 3a, 12a Opening part 4 Groove part 5 Connection part 3a, 12b Small through-hole 3c, 12c Large through-hole 13a Flat part 13b Slope part 20 Shaft cylinder 21 Picking

Claims (5)

  In a cosmetic coating core made of a porous body using a three-dimensional network thermoplastic product having continuous pores, a through-type through-hole is formed from the base end portion to the tip coating surface portion of the porous body. The makeup is characterized in that the through hole has a diameter suitable for flowing a highly viscous coating liquid in the axial direction, and is formed in a continuous shape by exposing the pores to the coating surface portion and the through hole. Application core.   The porosity due to the pores is formed such that the coating liquid stays in the pores and can flow slightly when a force for extruding the highly viscous coating liquid from the opening of the through hole in the coating surface portion is loaded. The cosmetic coating core according to claim 1, wherein the cosmetic coating core is provided.   The cosmetic application according to claim 1 or 2, wherein the through hole comprises a thin short small through hole on the application surface side and a thick long long through hole in communication with the small through hole. core.   The cosmetic coating core according to any one of claims 1 to 3, wherein a groove portion extending between the plurality of openings is disposed on the coating surface portion.   The plurality of openings in the application surface portion and the through-holes communicating with each of the openings communicate with each other via a slit-like connecting portion that extends shallowly from the application surface portion toward the base end side. Item 5. The cosmetic coating core according to any one of Items 1 to 4.

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