JP2003189929A - Coating tool and manufacturing method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an applicator used for applying various powders and liquids in the fields of makeup, writing, painting, medicine, etc., particularly as a tip or applicator for applying an eye shadow as a cosmetic tool. Provided are a suitable applicator and a method for manufacturing the same. SOLUTION: In forming an applicator main body by bonding fiber bundles with a resin solution, the resin solution impregnated in the applicator main body is so hard that the outer peripheral portion of the applicator main body has a higher hardness than the central portion. By removing the solvent by hot air drying, the resin is adhered so that the resin is unevenly distributed on the outer peripheral side of the fiber bundle, and the outer peripheral portion of one or both ends is ground to be a coated portion, and the outer peripheral portion that is not ground is removed. An applicator is used as the holding unit.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an applicator used for applying various powders or liquids in the fields of makeup, writing, painting, medicine, etc., and a method for producing the same. More specifically, the present invention relates to an applicator suitable as a tip or an applicator for applying eye shadow and a manufacturing method thereof, which belongs to the technical field of makeup tools, writing tools, paints, medical tools and the like.

[0002]

2. Description of the Related Art A variety of applicators are used in a wide range of fields such as writing tools and paintings and medicine. However, its form varies widely depending on the application. For example,
As makeup products, various types such as face brush, cheek brush, eye shadow brush, eye shadow tip (applicator), eye color brush, eye color tip, lip brush, etc. such as brush type and sponge type are commercially available. Has been done.

Also, as a method of manufacturing an applicator, for example, a method of bundling animal hair or synthetic fibers into a brush or a brush, or a coating member in which the ends of fiber bundles bonded with an adhesive are processed into a sharp shape Method, a method of using a molded article having a synthetic resin porous sponge-like material as a tip, and an extrusion molded article of an elastic or soft thermoplastic synthetic resin having a slit-shaped capillary tube formed therein as a coating member There are ways.

[0004]

With respect to these various applicators, investigations are always being made in search of better ones. Among them, powder eye shadow applicators, eye shadow tips (applicators) and eye shadow brushes have various problems as described below.
There is a strong demand for its elimination.

That is, since the sponge tip (applicator) and the NBR tip (applicator) change greatly over time and are often discolored or cured, they may be deteriorated to pieces. The flocky tip (applicator) using electrostatic flocking has a problem that the hair falls out. Animal hair has not only problems in terms of environmental protection and animal welfare, but also in terms of price.

In view of the above situation, the inventor has attempted to solve the problem by using a fiber bundle widely used in writing instruments such as a pen and a writing brush, particularly a fiber bundle made of synthetic fiber. As a result, when binding and adhering the fiber bundle with the synthetic resin, the synthetic resin used for adhering the fiber bundle is unevenly distributed in the outer peripheral portion of the fiber bundle such that the outer peripheral portion is hard and the central portion is uneven. It was found that an excellent applicator for makeup can be obtained by softening the portion, and the present invention has been completed.

That is, the present invention provides an applicator which is excellent in durability and can be used in a wide range of applications, is easy to manufacture, and is satisfactory in terms of cost, and a manufacturing method thereof. It is a thing.

[0008]

In order to achieve the above object, the invention according to claim 1 of the present invention is characterized in that when the fiber bundle is adhered with a synthetic resin to form the applicator body, A coating characterized by bonding so that the hardness of the outer peripheral portion is higher than the hardness of the central portion, grinding the outer peripheral portion of one or both end portions as an application portion, and the outer peripheral portion not ground as a holding portion. It is a tool.

Further, the invention according to claim 2 is characterized in that the difference between the hardness of the outer peripheral portion and the hardness of the central portion is due to uneven distribution of the synthetic resin used for bonding the fiber bundle to the outer peripheral portion. The applicator according to claim 1.

The invention according to claim 3 is the hardness of the outer peripheral portion (durometer hardness: JIS K6301A type).
Is the hardness of the central part (durometer hardness: JISK630
It is 1.3 times or more hardness of 1A type), It is an applicator of Claim 1 or 2 characterized by the above-mentioned.

The invention according to claim 4 is the hardness of the outer peripheral portion (durometer hardness: JIS K6301A type).
Is the hardness of the central part (durometer hardness: JISK630
The applicator according to any one of claims 1 to 3, wherein the applicator has a hardness of 1.3 times or more that of 1A type) and a hardness of 30 or more.

The invention according to claim 5 is characterized in that the synthetic resin for adhesion is a polyurethane resin and the fiber bundle is a polyester fiber bundle or a nylon fiber bundle. It is a tool.

The invention according to claim 6 is the applicator according to claim 1, characterized in that the applied portion has the bundle of fibers unraveled.

Further, the invention according to claim 7 is the applicator according to claim 1, wherein the application part is angular, cylindrical, substantially hemispherical, or shell-shaped.

Further, in the invention described in claim 8, when the fiber bundle converged to a required diameter is impregnated with the resin solution to be bonded, the hardness of the outer peripheral portion of the fiber bundle impregnated with the resin solution is The applicator is characterized in that the applicator main body is molded by curing so as to have a hardness higher than that of the part, and one end portion or both outer peripheral portions of the obtained applicator main body is ground to form the applicator portion. Is a manufacturing method.

According to the invention of claim 9, after the resin solution is impregnated with a long fiber bundle converged to a required diameter, the hardness of the outer peripheral portion of the fiber bundle is higher than the hardness of the central portion. In curing so that one side of the fiber bundle is immersed in the resin solution, by removing the solvent in the impregnated resin solution from the surface of the fiber bundle on the other end side, the resin on the outer peripheral portion The method for manufacturing an applicator according to claim 8, wherein the applicator is unevenly distributed.

Further, in the invention according to claim 10, the fiber bundle is obtained by removing the solvent in the resin solution from the surface of the fiber bundle by drying the fiber bundle impregnated with the resin solution with hot air. The method for manufacturing an applicator according to claim 8 or 9, wherein the hardness of the outer peripheral portion is made higher than the hardness of the central portion.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION The applicator of the present invention is impregnated with a resin when a converged fiber bundle is bonded with a synthetic resin (hereinafter simply referred to as "resin"), as in a conventional pen tip. The hardness of the outer peripheral portion of the fiber bundle is made higher than that of the central portion to form the applicator body. Specific examples of fibers and resins include the following.

Examples of fibers constituting the applicator include synthetic fibers such as nylon, polyester, acryl and vinylon. Among these synthetic fibers, polyester fibers, which facilitate the preparation of a brush-shaped applicator, and nylon fibers, which give a soft feeling of use, are preferable.

The fiber single yarn decitex varies depending on the use, but generally 1 to 100 decitex is used. Usually, those having 2 to 50 decitex are preferable. The total decitex of the fiber used depends on the application, shape, and outer diameter of the applicator and is usually 3,0
It is 00 to 170,000 decitex.

As the resin for adhering the fiber bundle,
Examples thereof include thermosetting resins such as unsaturated polyester, urea formalin, phenol, epoxy, melamine and polyurethane, and thermoplastic resins such as polyvinyl acetate, polyolefin and low melting point polyester. Among them, polyurethane resin is preferable from the viewpoints of coating performance, resin characteristics, applicator applicability, and productivity.

The polyurethane resin is composed of polyisocyanate and polyol. As the polyisocyanate, a diisocyanate compound represented by tolylene diisocyanate, diphenylmethane diisocyanate, polymethylene polyphenyl isocyanate, hexamethylene diisocyanate, xylylene diisocyanate, etc., a diisocyanate compound derived from diol or diamine and diisocyanate, and one molecule of trimethylol Triisocyanates and their derivatives produced from propane and three molecules of toluylene diisocyanate,
Further, a blocked isocyanate in which these isocyanate groups are masked with a blocking agent such as phenol or cresol can be mentioned.

These resins are used as a solution when bonding the fiber bundle. As a solvent used for forming a solution, a solvent that can be easily recovered and reused and has a high evaporation rate is preferable. Specifically, it is mainly composed of methylene chloride, methanol, acetone, ethyl acetate and the like, and phenol, cresol, dimethylformamide, dimethylacetamide and the like are used together. The resin solution, which depends on the impregnation conditions and the like, is preferably one having a resin concentration of 1 to 30% by mass. More preferably 2 to 30% by mass, particularly preferably 2 to 20
Those having a mass% and a viscosity of 50 cps or less are preferable.

In the applicator of the present invention, these resins are used to bond the fiber bundle. that time,
Making the hardness of the outer peripheral portion of the applicator body higher than the hardness of the central portion, in other words, unevenly distributing the resin in the outer peripheral portion in a large amount (naturally, in the central portion) makes the outer peripheral portion hard and the central portion soft. That is an essential condition. Specifically, it is carried out by controlling the removal of the solvent in the resin solution with which the fiber bundle is impregnated.

As a means for adhering the fiber bundles with a large amount of resin unevenly distributed on the outer peripheral portion, a method of immersing the fiber bundles cut to an appropriate length in the resin solution for a certain period of time or a method of spraying the resin solution can be considered. Both conditionally and industrially, it is preferable to divert the apparatus used for producing a pen tip or the like from a conventional fiber bundle.

That is, the conventional device used for manufacturing a pen tip or the like is devised to prevent uneven distribution of the resin in order to maintain the uniformity of quality, and the respective conditions are strictly set. It was In the present invention, the fiber bundle bonded by the resin unevenly distributed on the outer peripheral portion can be obtained by eliminating or changing those ideas and conditions.

An example of a manufacturing apparatus for obtaining the applicator of the present invention will be described below with reference to FIG. This manufacturing apparatus is formed into a bobbin 3 on which a large number of continuous fibers 1 are wound, a feed roll 2 for tension adjustment, a heating block 4 for heating a large number of fibers 1 into a bundle, and a bundle. The resin solution tank 7 for impregnating the fiber bundle with the resin, the hot-air drying furnace 11 for curing the resin impregnating the fiber bundle, and the resin-cured fiber bundle drawn from the take-up roller 12 are cut into a required length. It is composed of a cutter 13 for.

A large number of fibers 1 fed from the bobbin 3
Is fed to the die 5 while the tension is adjusted by the feed roll 2 and subjected to heating / compression molding to form a columnar fiber bundle 6. The die 5 usually has a temperature of 210 to 250 ° C. for polyester fiber and a temperature of 17 for nylon fiber.
0 to 215 ° C, temperature of 190 to 25 for acrylic fiber
It is heated to the range of 0 ° C.

Fiber bundle 6 formed into a pillar shape by a die 5
Is sent to the resin solution tank 7 through the orifices 8 and 10. The resin solution 9 is impregnated into the inside by passing through the same tank. The fiber bundle 6 impregnated with the resin solution 9 is supplied to the hot air drying furnace 11, and the hot air removes the solvent from the surface and cures the resin inside.

At this time, the solvent contained in the resin solution is removed from the surface of the fiber bundle 6 by the hot air while being evaporated. At that time, the resin impregnated in the central portion moves to the surface of the fiber bundle 6, and as a result, the resin is unevenly distributed in the outer peripheral portion. However, the fiber bundle 6 existing in the hot air drying furnace 11 is continuous with the fiber bundle 6 existing in the resin solution tank 7. Therefore, the resin solution 9 is constantly supplied to the fiber bundle 6 in the hot air drying furnace 11 by the capillary action. Therefore, the amount of resin unevenly distributed in the outer peripheral portion can be controlled by changing various heating conditions.

The amount of resin unevenly distributed on the outer peripheral portion of the fiber bundle can be adjusted by adjusting the concentration of the resin solution 9 used. The temperature of the hot air drying furnace 11 is usually 40 to 25.
Depending on the type and concentration of the solvent of the resin solution 9 within the range of 0 ° C,
It is adjusted appropriately.

The thus obtained fiber bundle 6 in which the resin is unevenly distributed in the outer peripheral portion and the hardness of the outer peripheral portion is higher than the hardness of the central portion, the fiber bundle 6 is taken by the take-up roll 12 and optionally cut by the cutter 13. The length of fiber bundle 14 is cut.

Required diameter (thickness) cut to an arbitrary length
In the fiber bundle 14 having the above, one end portion or the outer peripheral portion of both end portions is ground by a grinder or the like for a required length to expose the central portion to form the coating portions 22 and 23. The outer peripheral portion that is not ground is used as the holding portion 21 of the applicator 20.

The central portion (applied portion) exposed by grinding the unevenly distributed outer peripheral portion into a square shape, a substantially hemispherical shape or a shell shape is soft because the resin is not attached so much, and is slightly used when used. The tip is released by various stresses, giving a soft feeling of use. At that time, as shown in FIG. 2, a stress such as rubbing is applied to the central portion of the fiber bundle so that the fiber bundle is well resolved to form a cylindrical brush shape as shown in FIG.
B (bullet shape) and FIG. 2C (chisel shape) are partially disentangled to be soft and made into a brush shape to give a softer feeling of use.

It should be noted that the softness, the feeling of use, the holding power of the coating material, etc. can be freely set according to the diameter of the fiber bundle, the kind and amount of the fiber, the kind and amount of the resin, the length and thickness of the grinding portion, etc. It is possible to adjust. Further, the shape of the fiber bundle can be adjusted by forming it into a cylindrical shape, a prismatic shape, a plate shape, or the like.

In the applicator of the present invention, as shown in FIGS. 3 and 4, the outer peripheral portions of both ends of the fiber bundle 14 having a required diameter can be ground into the applicator portions 22 and 23. That is, in the applicator 20 shown in FIG. 3, one end of the holding part 21 has a brush shape (22) and the other end has a cannonball shape (23). The applicator 30 shown in FIG. One end is sharp-edged (33) and the other end is hemispherical (32),
It is possible to combine them arbitrarily depending on the use and purpose.

In the applicator of the present invention, a portion having a hard outer peripheral portion where the resin is unevenly distributed is used as a holding portion, and an end portion whose surface is ground to reveal the central portion is used as the coating portion. At that time, the characteristics vary greatly depending on the amount of the resin impregnated or unevenly distributed on the surface. Therefore, it is extremely important for the present invention to control the amount of the resin that is impregnated or unevenly distributed. It is not easy to measure the resin impregnated or unevenly distributed in the fiber bundle. However, since the hardness of the fiber bundle varies depending on the resin amount, the resin amount is estimated by measuring the hardness,
It is possible to adjust the performance of the applicator. This method is preferred for this invention.

In the present invention, as the hardness of the fiber bundle adhered by the resin, the outer peripheral portion where the resin is unevenly distributed has a durometer hardness (JIS K6301A type) of 30 to 100.
Is preferred. It is more preferably 40 to 100, particularly preferably 60 to 100. Further, the hardness of the central portion is preferably 70 or less, more preferably 60 or less, and particularly preferably 50 or less. If the hardness of the outer peripheral portion is less than 30, the holding portion may be broken even by a slight stress during use, so it is preferable to avoid it. If the hardness of the central part exceeds 70,
It is preferable to avoid it in the same manner, because the coated part becomes difficult to be loosened and the usability is deteriorated. The hardness is JISK6301
Using an A type durometer hardness meter, the cross section cut perpendicular to the axial direction was measured.

The ratio of hardness between the outer peripheral portion and the central portion usually indicates uneven distribution of the resin. Therefore, in order to improve the performance of the applicator of the present invention, the hardness of the outer peripheral portion is preferably 1.3 times or more the hardness of the central portion, more preferably 1.5 times or more, and more preferably 1.9. It is particularly preferable that the amount is twice or more. The upper limit of the hardness ratio is preferably 7.0 times or less. The change in this value is due to uneven distribution of the resin. As will be described later, when the outer peripheral portion is coated with a synthetic resin, etc., it can be sufficiently used even if it exceeds this range.

The applicator thus obtained can be used as it is. You can enjoy the change of appearance by coloring the holding part and the coating part with dye. There is no particular limitation on the dye used, but when polyester fiber is used as the fiber, it is desirable to use a disperse dye.

Further, by coating the holding portion with a synthetic resin and covering it with a shrink film or the like,
The ease of use can be improved. In addition, a colored shrink film can be used to change the appearance.
Further, it is possible to make the exterior film slidable and protect the application part, especially the brush-like application part, with the exterior film when the application part is not used.

The applicator of the present invention has a holding part, and the application part applies the separately prepared coating material such as powder, gel and liquid. At that time, connect the tubular body containing the liquid coating material to the end and apply the coating material with the other terminal as the coating portion, and attach the holding portion to one end of the wooden shaft detachably. It is also possible to use the applicator by changing the applicator according to the application charge. The applicator of the present invention can also be used for cleaning precision parts by using a cleaning agent or the like as an applied material.

[0043]

Example 1 A polyester fiber having a fiber thickness of 3 decitex was converged while adjusting the tension so that the total amount was 44,000 decitex, and heat compression molded in a pipe-shaped die to obtain an outer diameter. After finishing into a cylindrical fiber bundle of 4 mmφ, it is passed through an orifice through a resin solution tank containing a resin solution having the following composition. Composition of resin solution Urethane resin (isocyanate + polyol) 3% by mass Methylene chloride 97% by mass A cylindrical fiber bundle impregnated with the resin solution was introduced at an inlet temperature of 100
The solvent is removed and the resin is cured by passing it through a hot air drying oven set to a temperature of ℃ and an outlet temperature of 190 ℃. The obtained cylindrical fiber bundle had an outer diameter of about 4 mm ± 0.05φ, a porosity of about 65% inside, a central hardness (durometer hardness) of 32, and an outer peripheral hardness of 63 (hardness ratio 1.9
73), the resin content was unevenly distributed in the outer peripheral portion. This cylindrical fiber bundle was cut into a length of 50 mm, the outer periphery of the end portion 10 mm was ground with a grinder, and the center portion of the exposed fiber bundle was rubbed. An applicator having an excellent property was obtained.

Example 2 The results of making various applicators according to Example 1 while variously changing the conditions such as fiber type, thickness, fiber bundle thickness, resin type and concentration, etc. It shows in Table 1.

[0045]

[Table 1]

<Embodiment 3> In Embodiment 1, 0.01
Mass% oily red dye (manufactured by Nippon Kayaku Co., Ltd .; Kaya
set Red K-BL) A brush-shaped applicator was obtained in the same manner except that a dissolved resin solution was used. As is clear from FIG. 5 which is a micrograph of the cross section of the cylindrical fiber bundle in the process of production, the resin is unevenly distributed in the outer peripheral portion of the fiber bundle, so that the outer peripheral portion is red and the color is closer to the center and the color is different. It was getting thinner. Further, a brush-shaped applicator obtained by grinding the cylindrical fiber bundle with a grinder,
The outer peripheral portion, that is, the holding portion was red and the brush portion was white.

Example 4 The applicator prepared in Example 3 was applied with 0.025 of a yellow dye for dyeing polyester fiber (Katsuya Fine Goods; Coal Dye Hot H5 Yellow).
Dyeing was performed for 1 hour at a temperature of 95 ° C. with a solution prepared by adding 0.25 g / l of a dyeing auxiliary to a mass% aqueous solution. In order to wash away the excess dye of the dyed applicator, 0.025 mass% soaping solution is used for reduction cleaning at a temperature of 80 ° C. for 10 minutes. The brush part is yellow and the holding part is orange. I got the ingredients.

[0048]

According to the applicator of the present invention, when the fiber bundle is adhered with the resin to form the applicator body, the hardness of the outer peripheral portion of the fiber bundle is set to be higher than the hardness of the central portion. It has excellent weather resistance and has no problems such as hair loss, and it is a cosmetic applicator, especially a powder eye shadow applicator.
There is no fear of the magnitude of change over time, discoloration, or deterioration due to resin curing of the eye shadow chip (applicator) or eye shadow brush.

Further, the method for manufacturing an applicator of the present invention is an extremely simple means of removing the solvent in the resin from the outer peripheral portion by an appropriate means when the fiber bundle is bonded with the resin, and is excellent in weather resistance, It is possible to manufacture an applicator of excellent quality that does not cause hair loss or the like. Further, the device is also excellent in that the conventional device can be diverted and is simplified and the manufacturing cost is reduced.

[Brief description of drawings]

FIG. 1 is a schematic process drawing showing an example of a manufacturing process of an applicator according to the present invention.

2A and 2B are explanatory diagrams showing a grinding state of an outer peripheral portion in a manufacturing process, in which FIG. 2A shows a brush-shaped coating portion, FIG. 2B shows a shell shape, and FIG.

FIG. 3 is a front view showing an example of an applicator according to the present invention.

FIG. 4 is an explanatory view showing still another example of the applicator according to the present invention.

FIG. 5 is a micrograph showing a cross-sectional structure of an applicator according to the present invention.

[Explanation of symbols]

1 fiber bundle 2 Feed roll 3 bobbins 4 heating block 5 dies 6 columnar fiber bundles 7 Resin solution tank 8 orifices 9 Resin solution 10 Orifice 11 Hot air drying oven 12 Collection roll 13 cutter 14 Cut fiber bundle 20,30 applicator 21,31 Holding part

Claims (10)

[Claims] 1. When a fiber bundle is bonded with a synthetic resin to form an applicator main body, the applicator main body is adhered so that the hardness of the outer peripheral portion thereof is higher than the hardness of the central portion, and one or both end portions of the applicator main body are adhered. An applicator characterized in that the outer peripheral part of the is ground as an application part, and the outer peripheral part that is not ground is a holding part. 2. The applicator according to claim 1, wherein the difference between the hardness of the outer peripheral portion and the hardness of the central portion is caused by uneven distribution of the synthetic resin used for bonding the fiber bundle in the outer peripheral portion. . 3. The hardness of the outer peripheral portion (durometer hardness: J
ISK6301A type has the hardness of the central part (durometer hardness: JISK6301A).
The hardness of the mold is 1.3 times or more that of the mold). 4. The hardness of the outer peripheral portion (durometer hardness: J
ISK6301A type has the hardness of the central part (durometer hardness: JISK6301A).
The applicator according to any one of claims 1 to 3, wherein the hardness is 1.3 times or more that of the mold) and the hardness is 30 or more. 5. The applicator according to claim 1, wherein the adhesive synthetic resin is a polyurethane resin, and the fiber bundle is a polyester fiber bundle or a nylon fiber bundle. 6. The applicator according to claim 1, wherein the applicator has a bundle of fibers unraveled. 7. The applicator according to claim 1, wherein the applicator portion is angular, cylindrical, substantially hemispherical, or shell-shaped. 8. When impregnating a resin solution with a fiber bundle converged to a required diameter and adhering the fiber bundle, the outer periphery of the fiber bundle impregnated with the resin solution is cured so as to be higher than the hardness of the central portion. A method for manufacturing an applicator, wherein the applicator main body is molded by the above, and one end portion or both end portions of the obtained applicator main body is ground to form an applicator portion. 9. A resin solution is impregnated with a fiber bundle converged to a required diameter, and when the outer periphery of the fiber bundle is hardened so as to be higher than the hardness of the central portion, one side of the fiber bundle is The resin is unevenly distributed in the outer peripheral portion by removing the solvent in the impregnated resin solution from the surface of the fiber bundle on the other end side in a state of being immersed in the resin solution. Manufacturing method of applicator. 10. The fiber bundle is obtained by removing the solvent in the resin solution from the surface of the fiber bundle by drying the fiber bundle impregnated with the resin solution with hot air. The method for manufacturing an applicator according to claim 8 or 9, wherein the method is larger than the above.