JP3267723B2 - Manufacturing method of cosmetic tools - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a cosmetic tool, and more particularly, to a method of manufacturing a cosmetic tool having a smooth peripheral portion, suitable for mass production, and particularly excellent in feel and appearance during use. It relates to a manufacturing method.

[0002]

2. Description of the Related Art Cosmetic tools (especially puffs) are required to have excellent feel (feel, softness) during use. For this reason, as shown in FIG. 5, the peripheral side surfaces of the two rubber latex foams 21a and 22a having a substantially elliptical shape or the like are joined to each other with an adhesive, and a cavity 5a is formed in the interior to improve the feel. Easy-to-puff (p. 53-68379)
And the like have been proposed. The joining between the peripheral side surfaces of each plate can also be performed by using a high-frequency welding machine. Further, in the case of a resin foam (for example, urethane foam), since it is a resin and the ventilation holes are too large, the appearance and touch are poor, and a layer for soaking a puff liquid foundation or the like and applying a cosmetic to the skin (hereinafter, referred to as a There is a surface that is not suitable for use as a “cosmetic application layer”. Therefore, a multi-layer puff in which the cosmetic application layer is constituted by a rubber latex foam which feels relatively moist, and the inner layer (or base layer) is constituted by a resin foam having a cell having an appropriate size of air holes. Has also been manufactured. Also in this case, the bonding between the peripheral side surfaces of the respective layers is performed using the above-mentioned adhesive or a high-frequency welding machine. In addition, as shown in FIG. 6, a method of manufacturing a multi-layer puff includes each layer (22b,
There is also a method in which the surface (or back surface) of 3b and 21b) is bonded with an adhesive to form a puff base material, cut into a desired puff shape, and then the front surface, back surface, and side surfaces are polished.

[0003]

However, in the above method and the method using an adhesive, the portion to which the adhesive is applied becomes hard, and in the method using the high frequency welding machine and the method described above, the cut portion is heated. Hardened and hardened, and easily become burr-like. Therefore, the puffs produced by any of the methods have a hard feeling when applied to the skin or are caught on the skin, resulting in poor usability. Further, in the puff manufactured by the method using the above-mentioned adhesive, there is a problem in terms of durability because the adhesive may peel off with the passage of time. Further, the high frequency welding machine is liable to cause a failure due to electric discharge, so that the manufacturing efficiency is deteriorated. In the above-described method of bonding the front surface (back surface) of the resin foam with an adhesive, it is possible to bond vulcanized rubber or the like, which is difficult to weld with a high-frequency welding machine. And a puff substrate (puff) produced by this method.
, The inner layer portion 3b is visible from the outside, so that the appearance is poor.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has a smooth peripheral portion, is suitable for mass production, and is particularly suitable for producing a cosmetic tool which is excellent in feel and appearance during use. The purpose is to provide.

[0005]

SUMMARY OF THE INVENTION According to the present invention, there is provided a method for manufacturing a cosmetic tool, comprising: a base material layer comprising an open-celled polyurethane resin foam (hereinafter referred to as "polyurethane resin foam"); It is formed on at least one surface of the layer, and using a foamed rubber latex material, and a non-vulcanized foam rubber latex surface layer which is shaped, made from type molding
Place the surface smoothing prevention sheet on the bottom surface of
Rubber latex foam foamed on the surface smoothing prevention sheet
And then open-cell polyurethane on top
System resin foam, and then, if necessary,
Injection of foamed rubber latex material and prevention of surface smoothing
After arranging the sheet, leave it as it is
The latex material is shaped, and then the surface is smoothed.
Cutting the polyurethane / unvulcanized rubber laminate manufactured by removing the prevention sheet into a desired shape using a frame-shaped blade body heated at least on the tip side while cutting the laminate. The peripheral portions are vulcanized and bonded, and then the punched laminated body is heated to vulcanize other than the cut peripheral portions, and the base material layer and the unvulcanized foamed rubber latex surface layer Are vulcanized and bonded. Here, the above-mentioned "cosmetic tool" is intended to be used for makeup, and refers to a tool used for applying or wiping a cosmetic or the like. Puffs, applicators, cheek brushes, wipes, etc. The same applies to the following inventions.

The above "polyurethane / unvulcanized rubber laminate"
Placed a surface smoothing prevention sheet on the bottom of the mold,
Thereafter, the foamed rubber latex material was injected onto the surface smoothing prevention sheet, and then an open-cell polyurethane resin foam was placed thereon, and further, if necessary, foamed sequentially. The rubber latex material is injected and the surface smoothing prevention sheet is arranged, and then left as it is to shape the rubber latex material, and then the surface smoothing prevention sheet is removed. The material and shape of the sheet are not particularly limited as long as the generation of a skin surface (a surface where the fine hollow portions are crushed and the surface is smoothed to some extent and the cosmetic is not well held) can be suppressed. For example, a sheet-like or plate-like article (made of resin, metal, or the like) having an uneven surface, a large number of mesh patterns, or a large number of fine through holes can be given.

The above-mentioned “polyurethane / unvulcanized rubber laminate” is obtained by injecting a foamed rubber latex raw material into a molding die, and then placing an open-cell polyurethane resin foam thereon. Further, if necessary, sequentially inject the foamed rubber latex raw material and arrange the surface smoothing prevention sheet, and then leave it as it is to shape the rubber latex raw material. The surface layer of the excipient may be plowed (sliced) to remove the skin layer so that the cell surface having the fine hollow portion is exposed. In addition, even if the surface is not plowed as described above, when a certain amount of fine hollow portions are provided, although the retention of the cosmetic is not sufficiently excellent, the retention of the cosmetic can be expected to a certain extent. Can also be used.

In the method for manufacturing a cosmetic tool of the present invention, the material of the base layer and the material of the surface layer can be reversed. That is, using a foamed rubber latex raw material, a base layer made of a shaped unvulcanized foam rubber latex, and an open-cell polyurethane resin foam formed on at least one surface of the base layer. A cosmetic tool can also be manufactured using a polyurethane / unvulcanized rubber laminate comprising a body surface layer. Also in the present invention, the surface layer must form a cell surface so as to maintain a cosmetic amount or the like. For this purpose, as described above, the skin layer may be formed using a surface smoothing prevention sheet, or the skin layer serving as the skin layer may be removed by plowing.

The rubber component of the above "rubber latex" includes, for example, NBR (acrylonitrile-butadiene rubber), SBR (styrene-butadiene rubber), IR (isoprene rubber), NR (nitrile rubber), urethane rubber, chloroprene rubber, Butyl rubber, polybutadiene rubber, polyisoprene and the like can be used. Of these, it is preferable to use NBR which is excellent in weather resistance, oil resistance, hygiene (mainly the effect of suppressing the generation of microorganisms), and the like. In addition, as the rubber latex raw material, an emulsion in which air bubbles are taken in by physically forcibly stirring is usually used, but a foaming agent and a stabilizer may be further added to stabilize a foaming state. . Also, if necessary,
An anti-aging agent, a softening agent and the like can be added.

The method for manufacturing a cosmetic tool according to the present invention is directed to a vulcanized rubber which is integrally formed by vulcanization and adhesion on at least one surface of the substrate layer comprising a polyurethane resin foam. A peripheral layer of the base material layer and the surface layer, which is simultaneously punched out by a frame-shaped blade body heated at least on the front end side. A cosmetic tool which is heat-welded and does not generate burrs on the heat-welded peripheral portion .
Can be

In the method for producing a cosmetic tool of the present invention, the material of the base layer and the material of the surface layer can be reversed . That is, a base layer made of a vulcanized rubber latex foam, and integrally formed on at least one surface of the base layer by vulcanization adhesion, made of a polyurethane resin foam,
And a surface layer having a fine hollow portion, and the peripheral edges of the base material layer and the surface layer are simultaneously heat-welded while being punched out by a frame-shaped blade body heated at least on the front end side. of the peripheral portion to be heat-welded no burrs
It can be a cosmetic tool .

[0012]

According to the present production method, the above-mentioned polyurethane / unvulcanized rubber laminate is punched into a desired shape by a blade having a heated front end side, and the cut peripheral portions thereof are vulcanized and bonded.
Therefore, the peripheral portion does not have a hardened joint as in the case of using an adhesive, and does not have burrs or the like in the joined portion as in the case of using a high-frequency welding machine. For this reason, a portion that feels hard when applied to the skin or a portion that feels caught is not generated on the peripheral portion of the manufactured cosmetic tool. Further, since the cut peripheral portions are welded to each other, it is possible to firmly join the small joint surfaces. In addition, in the present invention, since the punched laminated body is heated, the front and back surfaces of the polyurethane resin foam and the unvulcanized foamed rubber latex formed body other than the above-mentioned cut peripheral portion are integrally molded. Sulfuric bonding is used, and the bonding between the two becomes strong, and there is no fear of peeling, peeling, etc. over time.

When a surface smoothing prevention sheet is used or a polyurethane / unvulcanized rubber laminate produced by plowing the surface layer is used, a surface layer having a fine hollow portion of a cosmetic tool can be secured. It can be excellent in holding cosmetics. Further, in the case of a cosmetic tool whose surface layer is made of a rubber latex foam, a moist and heavy feel and appearance can be obtained, and since the base material layer is made of a polyurethane resin foam, it is soft and soft. The touch can be obtained and the overall weight can be reduced. On the other hand, in a cosmetic tool in which the surface layer is made of a polyurethane resin foam and the base material layer is made of a rubber latex foam,
It is possible to obtain a heavy dossily as a whole.

[0014]

The present invention will be described below in detail with reference to examples. In the present example, a cosmetic puff was manufactured as follows. First, as shown in FIG. 1, a container-like molding die (about 3 mm) having a substantially rectangular parallelepiped cavity formed therein.
00 × about 300 × about 50 mm) A resin smooth surface generation prevention sheet (thickness: about 10
mm) 11 was arranged such that the uneven surface thereof was directed upward. This uneven surface shape is one in which a large number of recesses of about 20 to 1000 μm (generally about 40 to 100 μm) are continuous (or one in which a large number of groove-like uneven patterns are formed).
Next, on this sheet 11, an acrylonitrile product (trade name; "NBR") in acrylonitrile butadiene rubber was used.
-531 ", a water-based emulsion having an acrylonitrile content of 25% by weight, a concentration of 65%, manufactured by Nippon Zeon Co., Ltd., and a foaming liquid 21 physically foamed with a forced stirrer to a thickness of about 3 mm. Was injected as follows.

Thereafter, a rectangular open-cell type flexible polyurethane resin foam (sheet) (about 30) is placed on the foaming liquid 21.
0 x about 300 x about 3 (thickness) mm, density: 30 kg / m
^3. Number of cells (number of bubbles; about 50 cells / 2.5 mm ² ) 3 was arranged, and then the same amount of foaming liquid 21 and foaming liquid 22 were injected onto resin foam 3. . Next, the smooth surface prevention sheet 11 and the sheet 12
Were arranged such that the uneven surface faces downward. Then, in this state, the foamed liquids 21 and 22 were fixed by leaving them to stand for about 30 minutes to perform shaping, and a certain degree of adhesion between the molded article and the resin foam was also performed.
Next, the smooth surface generation preventing sheets 11 and 12 were removed to prepare a polyurethane / unvulcanized rubber laminate B.

On the other hand, punching of cosmetic puffs from the laminate B was performed by a cutting machine having a pair of blades 41 and 42 as shown in FIG. Each of the blades 41 and 42 has a substantially oval outer shape and is a frame-shaped member that moves in the vertical direction. The blades 41 and 42 are moved downward and upward, respectively. The puff is punched out in a state where the tips 411 and 421 are in contact with each other. The tip portions 411, 421 of the blades 41, 42 are heated to about 180 ° C. by a heating plate disposed inside the blades.

Then, using such a cutting machine, while cutting a puff having a substantially oval outer shape from the rubber laminate B, the cutting peripheral portions of the rubber latexes 21 and 22 are heated and vulcanized. Glued. In addition, the frame-shaped blade body 4
The reference numerals 1 and 42 are not limited to those having the above-mentioned substantially egg-shaped outline, and can be selected according to the desired puff shape. The means for heating the tip portions 411 and 421 of the blade body is not limited to the above case, and the temperature can be selected according to the material (melting point) of the laminate B to be cut.

Next, the puff punched out in this manner was heated in air at a temperature of 50 to 90 ° C. to vulcanize portions other than the above-mentioned cut edge, thereby producing a puff according to the example. . This puff C is, as shown in FIGS. 3 and 4,
When the plane shape is egg-shaped (major axis: about 65 to 70 mm, minor axis: about 4
5 to 50 mm, thickness: about 8 mm), and a vulcanized rubber latex foam integrally formed by vulcanization bonding on both surfaces of the substrate layer 3 made of a polyurethane resin foam and vulcanized adhesion. Surface layer 21 consisting of and having a fine hollow portion
A, 22A. The peripheral portions of the base material layer 3 and the surface layers 21A and 22A are heat-welded so that no burrs are generated.

The puff produced as described above has a surface layer 2
Since the cell surface is formed over the entirety of 1A and 22A, the cosmetic has a very good paste. Also,
Since the peripheral portions of the rubber latex are joined together by vulcanization bonding, the joined portions are not hardened, and the joined portions are free from burrs and the like, and have a soft skin contact. Furthermore, since the surface layers 21A and 22A and the base material layer 3 are firmly joined, there is no fear of peeling over time, peeling, and the like. Further, the manufacturing operation is easy, and the cut peripheral portions can be firmly joined to each other with a small joining surface, and the base material layer is completely hidden by the surface layer, so that the appearance is very good. Furthermore, since the base layer is made of polyurethane resin foam, it is soft and light, and both sides of the base layer are covered with a rubber surface layer, so that when touching the skin, it has a moist, heavy feel. And both surfaces can be used as a cosmetic coating layer.

The present invention is not limited to the specific embodiments described above, but may be variously modified within the scope of the present invention according to the purpose and application. That is,
By providing a blocking layer (non-venting layer) at an appropriate position inside the above-mentioned surface layer, it is possible to have an appropriate liquid holding power. Thus, when the liquid foundation is used, it can be used as a puff which is soft and does not excessively penetrate. The material of the substrate layer and the surface layer is not particularly limited as long as it is within the scope of the present invention. When the surface layer is formed on one surface of the base material layer, it is preferable that the surface of the exposed base material layer also be a cell surface so that the cosmetic amount can be maintained. This is because both sides can be used for makeup.

[0021]

The cosmetic tool manufactured using the manufacturing method of the present invention does not have any hard parts or burrs that are worrisome when touching the skin, is excellent in use comfort, and furthermore has a good quality between the two layers. Bonding becomes strong, and there is no fear of peeling, peeling, etc. over time. Further, in the present invention, since the cut peripheral portions are welded to each other, it is possible to firmly join with a small joint surface. Furthermore, in the case of a cosmetic tool whose surface layer is made of a rubber latex foam, a moist feeling, a soft and soft feeling can be obtained, and the weight can be reduced as a whole. In addition, in the case of a cosmetic tool in which the surface layer is made of a polyurethane-based resin foam and the base material layer is made of a rubber latex foam, it can be made into a heavy dossily as a whole. Further, the present manufacturing method is excellent in workability and mass productivity.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a production process of a polyurethane / unvulcanized rubber laminate in an example.

FIG. 2 is an explanatory longitudinal sectional view showing a state in which a polyurethane / unvulcanized rubber laminate in an example is cut into a puff shape.

FIG. 3 is a longitudinal sectional view of the cosmetic puff according to the present embodiment.

FIG. 4 is a perspective view of a cosmetic puff according to the present embodiment.

FIG. 5 is a longitudinal sectional view of a cosmetic puff according to a conventional example.

FIG. 6 is a perspective view of a cosmetic puff according to a conventional example.

[Explanation of symbols]

11, 12; surface smoothing prevention sheets, 21, 22; foaming liquid, 21A, 22A; surface layer, 3; polyurethane resin foam (base layer), 41, 42; blade body, 411, 421;
Tip of blade body, 5a; cavity, A: mold, B: polyurethane / unvulcanized rubber laminate, C: cosmetic puff.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-1-95041 (JP, A) JP-A-3-234206 (JP, A) JP-A-63-277006 (JP, A) JP-A-62-1987 284606 (JP, A) JP-A-62-148608 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) A45D 34/04

Claims (2)

(57) [Claims] 1. A base layer made of an open-cell polyurethane resin foam and an unprocessed rubber latex material formed on at least one surface of the base layer and expanded using a rubber latex raw material. and硫発foam rubber latex surface layer, it from
Place a surface smoothing prevention sheet on the bottom of the mold,
Then, rubber foamed on the surface smoothing prevention sheet
Inject latex material, then open cell type
Polyurethane resin foam is placed, and if necessary
Inject and list the foamed rubber latex material
Place the surface smoothing prevention sheet, then release
To form the rubber latex material, and then
Manufactured by removing the surface smoothing prevention sheet
While punching the polyurethane / unvulcanized rubber laminate into a desired shape using a frame-shaped blade body heated at least on the tip side, the cutting peripheral portions of the laminate are vulcanized and bonded together. Heating the punched laminate, vulcanizing other than the cut peripheral portion, and vulcanizing and bonding the base layer and the unvulcanized foamed rubber latex surface layer to vulcanized adhesive. Production method. 2. The polyurethane / unvulcanized rubber laminate is prepared by injecting a foamed rubber latex material into a molding die.
After that, open-cell polyurethane resin is released
Place the foam and, if necessary, sequentially foamed
Injection of rubber latex material and surface smoothing prevention sheet
After placing it, leave it on the rubber
The rubber raw material is shaped and then the rubber latex raw material
Plowing the surface layer of the excipient to remove the skin layer
2. The device according to claim 1, wherein the cell surface is formed so as to be exposed.
A method for producing the cosmetic tool according to the above.