JPH0374087B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a cosmetic applicator material, and particularly to a make-up applicator material and a method for manufacturing the same.

[Conventional technology]

2. Description of the Related Art Conventionally, many applicators for make-up cosmetics, for example liquid cosmetics, are made of porous foams such as foamed rubber and foamed urethane. These cosmetic applicators are manufactured by punching, cutting, polishing, etc., a large foam into a puff shape. Ivy portions will form. Such sharp parts on the surface of the applicator cause skin irritation such as a tingling or stiff feeling when applying cosmetics.

In order to reduce irritation to the skin surface as mentioned above and obtain a cosmetic applicator with a good feeling of use, the applicant of the present application has already developed a structure in which the surface of the skeleton of a foam is made of a flexible material in Japanese Utility Model Publication No. 57-29687. It is proposed to cover it with resin.

As mentioned above, by coating the surface of the skeleton of the foam with a flexible synthetic resin, skin irritation such as tingling or stiffness felt when applying cosmetics is considerably reduced.

[Problem that the invention seeks to solve]

However, even with this method, people with sensitive skin may still experience irritation, and even people with normal skin may experience irritation in sensitive areas of the skin, such as around the eyes. There is a need for cosmetic applicators that are less irritating and easier to use.

In addition, when covering the surface of the foam skeleton with a flexible synthetic resin, in order to round off the obtusely pointed parts of the foam skeleton on the surface of the applicator, it is better to have a thicker coating layer. It is good, but if the coating layer is too thick, the applicator will feel rough and the usability will be poor. On the other hand, if the thickness of the coating layer is too thin, the obtuse pointed portions will not be rounded, and therefore the irritation of the applicator to the skin will not be reduced. Furthermore,
When forming a synthetic resin coating layer on a foam as described above, it is necessary to delicately adjust the viscosity, adhesion amount, etc. of the synthetic resin.

Furthermore, when applying liquid (including cream) foundations, cosmetic applicators made of foam are generally used, but the cosmetics are hardly retained on the skeletal surface of the foam; inside the pores of the body,
In other words, it enters the space between the skeletons and is held there. Therefore, a considerable amount of cosmetics ends up entering the space. Since the cosmetics are trapped between the skeletons, when applying the cosmetics, the foam is pressed relatively firmly against the face, allowing the foundation to ooze out from within the foam. It is coated with a foam skeleton. As a result, too much foundation is produced, resulting in uneven coating, and traces of the foam skeleton resulting in streak-like coating unevenness. Moreover, in order to cause the foundation to ooze out, the applicator must be strongly pressed against the skin to spread the application, which inevitably causes strong irritation to the skin.

[Means for solving problems]

According to the present invention, the above-mentioned problems have been solved by a cosmetic applicator material made of a foam and having spherical beads contained in the foam.

In addition, regarding the manufacturing method of the applicator material,
After mixing spherical beads with foaming raw materials, the mixture is subjected to foaming treatment to form a foamed molded product.

[Effect]

The foam constituting the cosmetic applicator material of the present invention contains spherical beads. Therefore, when cutting a foam by applying a knife to it, the skeletal part of the foam is cut by the knife, but since the spherical beads are round and hard, the knife slides on the surface of the spherical beads, and the spherical beads are cut. Instead, the skeleton near the root of the spherical bead is cut off, avoiding the spherical bead. As a result, when the cosmetic applicator material of the present invention is cut with a knife, spherical beads are precipitated in a convex manner on the surface of the skeleton of the cut surface.

In the cosmetic applicator manufactured from the cosmetic applicator material of the present invention, the spherical beads are deposited on the surface of the skeleton forming the foam, so that the spherical beads come into contact with the skin during application. Spherical beads have round surfaces and no obtuse angles, so they do not give a tingling or stiff feeling when they come into contact with the skin, and are extremely less irritating to the skin.

In addition, in the cosmetic applicator made from the cosmetic applicator material of the present invention, the spherical beads are in point contact with the skin when applying cosmetics, so the contact area between the skin and the foam skeleton is small. Therefore, the frictional resistance when applying and spreading the cosmetic is small, and irritation to the skin is extremely small.

The cosmetic applicator manufactured from the cosmetic applicator material according to the present invention differs from conventional foam skeletons in that the outer surface of the skeleton is not flat, but has fine irregularities formed by spherical beads. is retained. When using the applicator, the cosmetic can be applied simply by applying the cosmetic to the applicator, lightly applying it to the skin, and spreading the application. Unlike conventional applicators, there is no need to forcefully press the foam against the skin surface, and there is no irritation.Also, since it does not apply pressure, it prevents the cosmetic from forming streaks and spots, making it even more effective. A cosmetic applicator with good usability can be obtained.

Embodiments Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.

Note that the drawings schematically represent the cosmetic applicator material of the present invention.Dimensionally, the spherical beads are shown enlarged compared to the foam skeleton.

The cosmetic applicator material of the present invention is formed by mixing spherical beads in a foaming raw material and then foaming the mixture using air, a foaming agent, or a method of generating gas through a chemical reaction. It is present inside the skeleton of the foam 1 and is also deposited on the surface of the skeleton of the foam 1. Note that 3 is a hole in the foam.

The main foam raw materials for manufacturing the applicator material of the present invention include synthetic resins such as polyvinyl chloride, polyester, polyethylene, polyurethane, and polypropylene, NBR (acrylonitrile butadiene rubber), SBR (styrene butadiene rubber), and NR (natural Rubber), silicone rubber, fluorine rubber, etc. can be used.

More specifically, the following can be used as these foam raw materials, for example.

*For synthetic resins: Superflex (polyurethane) Dai-ichi Kogyo Seiyaku Co., Ltd. Bontaiku (polyurethane) Dainippon Ink & Chemicals Co., Ltd. Dayknal (acrylic) Dainippon Ink & Chemicals Co., Ltd. Primal (acrylic) Load& Haas Co., Ltd. These raw materials are in an emulsified form, with crosslinking agents,
For example, melamine, formalin resin, polyamide crosslinking agents, epoxy crosslinking agents, blocked isocyanate crosslinking agents, etc. are used in combination.

*For rubber foams: Nipol 4850 (styrene rubber) Nippon Zeon Co., Ltd. Nippol LX-531 (acrylonitrile rubber) Nippon Zeon Co., Ltd. JSR (0560) (styrene rubber) Nippon Synthetic Rubber Co., Ltd. These raw materials are , is in the form of an emulsion, and a generally known vulcanizing agent or vulcanization accelerator is added to these raw materials to form a foam.

In the case of polyurethane, a polyol or polyester and an isocyanate compound (for example, tridiisocyanate, naphthalene diisocyanate, etc.) may be used as foam raw materials, and these may be chemically reacted to form a foam.

The raw material for the foam may be appropriately selected depending on the type and purpose of the cosmetic.

Next, the spherical beads to be mixed into the foam raw material will be explained.

Spherical beads themselves have recently been developed and commercialized, and are almost completely spherical microscopic powder particles.Currently, their uses include fillers, powder lubricants, adsorbents, and microfiltration agents. has been done.

There are two main methods for producing spherical beads: the building-up method and the breakdown method.

Examples of building-up methods include injection cooling method, liquid phase reaction method, injection drying method, extrusion molding method,
There are briquette sintering methods, etc. In the injection cooling method, materials such as plastics, urea, paraffin, rosin, etc. are melted and injected into particles by utilizing their surface tension and cooled to form spherical particles.

The liquid phase reaction method is based on pearl polymerization, etc., in which a synthetic resin is polymerized into spherical particles by stirring in a liquid.

The spray drying method is a method in which a solution or slurry liquid of starch, cellulose, synthetic resin, etc. is sprayed into particles and dried to form spherical particles.

The briquette sintering method is a method in which powder is solidified into a spherical shape and sintered.

The extrusion molding method involves extruding plastic or the like to form pellets into spheres.

Depending on the material, it can be manufactured by grinding and finishing it into a sphere using a tumbler or finishing it using a spherical pelletizer.

Further, the spherical beads 2 are not limited to solid ones, and may be porous ones or hollow ones such as microcapsules.

Porous spherical beads 2 can be produced, for example, by adding calcium carbonate powder, starch, etc. to a solution containing a synthetic resin, mixing and stirring to form spherical beads, and then eluting and removing the calcium carbonate powder, starch, etc. can be manufactured.

It is also possible to produce porous spherical beads from cellulose or inorganic materials by adding a foaming agent to the synthetic resin or by selecting reaction conditions and sintering conditions.

The material of the spherical beads 2 used in the cosmetic applicator material of the present invention is not particularly limited, and examples thereof include polyethylene, polypropylene, polyurethane, polyester, polyamide, polycarbonate, silicone resin, fluorine resin, phenolic resin, acrylic resin, and polystyrene. epoxy resin, vinyl resin,
Synthetic resins such as benzoguanamine resin; cellulose compounds; starch compounds; protein compounds such as collagen; calcium compounds; inorganic compounds such as ceramics and glass; metals; rubber, etc. can be used.

The material of the spherical beads 3 may be appropriately selected depending on the cosmetic to be applied. For example, water-repellent paraffin, polyethylene, silicone resin, fluororesin, etc. are suitable for cream foundations and the like. When a fluororesin having oil repellency is used, cosmetics adhering to the applicator can be easily washed off.

Water-absorbing proteins such as cellulose, collagen, and casein are suitable for summer foundations that use water. Additionally, using materials such as ceramic, glass, phenolic resin, polycarbonate, polystyrene, polypropylene, polyamide, etc. reduces the frictional resistance of the applicator, making it easier to apply and spread cosmetics on the skin, and is also suitable for pine surgery. .

The spherical beads 2 used in the cosmetic applicator material of the present invention are almost completely spherical, and the particle size is
Particles having an average particle size of about 0.5 to 5000 microns can be used, preferably about 5 to 2000 microns.
For example, if the material is for making an applicator for people with sensitive skin or for applying cosmetics to sensitive skin around the eyes, such as eye shadows, spherical beads 2 with a size of about 0.5 to 30 microns are used. Or,
Spherical beads 2 of about 30 to 100 microns are used as a material for making applicators for liquid foundations, and spherical beads of about 100 to 500 microns are used as materials for applicator tools for powder foundations. 2, or as a material for pine surge, it can be made into spherical beads 2 of 500 microns or more. Note that the relationship between the cosmetic and the particle size of the spherical beads 2 is not limited to that described above.

Furthermore, when porous spherical beads are used, since they have pores, they have excellent absorbency and water retention. The amount of spherical beads to be mixed into the foaming raw material depends on the size of the spherical beads, the material of the spherical beads, the type of cosmetics (viscosity, properties, etc.), and the intended use of the applicator (for applying cosmetics, for pine surge, etc.) , taking into consideration the amount of cosmetics contained, etc., and determining the amount so as to provide a good texture.

If the amount of spherical beads added is large, foaming may become difficult. In such cases, the foaming raw material and foaming conditions are controlled. In normal cases, spherical beads weigh approximately
It is possible to mix up to about 50%. but,
Considering the strength of the obtained foam, it is preferable to set the amount to about 10% to 30% of the weight of the foaming raw material.

Example 1 In the conventional method of producing a flexible polyurethane foam by reacting isocyanates and polyols, 20 parts by weight of nylon spherical beads with an average particle size of 10 μm are added to 100 parts by weight of foaming raw materials in polyol, and then Foaming was carried out while reacting isocyanate to obtain a foam block containing spherical beads in the framework of the foam. Cut this block,
I polished it and made a chip-shaped cosmetic applicator.

Example 2 When producing foamed rubber using the silicided soda method, polyester spherical beads with an average particle size of 15μ are added to the latex as a solid component before foaming and solidification.
Added and blended at a ratio of 20 parts by weight to 100 parts by weight,
Foam casting and vulcanization yielded a foam block containing spherical beads in a rubber foam skeleton. This block was cut and polished to make a cosmetic puff.

Example 3 A resin liquid in which a foam stabilizer, thickener, and crosslinking agent are added to a polyurethane emulsion, and nylon spherical beads with an average particle size of 10μ are added at a ratio of 15 parts by weight to 100 parts by weight of polyurethane solids. Prepare a resin liquid, blow air into this resin liquid to foam it four times,
It was coated on release paper to a thickness of 1.5 mm and dried to obtain a foam sheet with a thickness of 1.0 mm containing spherical beads in the urethane foam skeleton. After laminating this foam sheet onto a nonwoven fabric made of polyester fibers, the surface of the urethane foam sheet was polished and punched to form a cosmetic puff.

As shown in Examples 1 to 3, when producing the cosmetic applicator material of the present invention, it is essential to mix spherical beads into the foamed raw material. Materials for improving the texture (touch) may also be added.

For example, when adding hygroscopicity to a foam and using it as an applicator for summer cosmetics, as a modifying material,
For water absorption and water retention properties of cross-linked polymers of carboxymethyl cellulose, alkali metal carboxylate salts, starch-acrylic polymers, vinylon, rayon, acrylic moisture absorption materials, sponge powder, cotton powder, calcium carbonate, calcium sulfate, polyamino acids, etc. It is possible to blend excellent powders and fibers.

In addition, when used for oil-based foundations, it can be improved by adding silicone resin, silicone oil as a lipophilic material, or fluororesin as an oil repellent agent. In the case of a granular modifier, it is preferable that its size is the same as or smaller than the spherical beads 2. Furthermore, if the mixing ratio of the modifier with the spherical beads 2 is too large, the smooth texture of the spherical beads 2 will not be sufficiently achieved. There is a tendency for this to occur, especially when the powdery modifier is larger.
The amount of the modifying material is preferably limited to the same amount as the spherical beads 2.

Furthermore, when adding spherical beads, it is also possible to mix a plurality of beads with different sizes. That is, by incorporating spherical beads of different particle sizes and materials into a foam that takes into consideration the viscosity, properties, etc. of the make-up cosmetic, it is possible to obtain a cosmetic applicator with even better absorption of the cosmetic. can.

Furthermore, the cosmetic applicator material of the present invention may be laminated with another foam containing no spherical beads to form the application portion using the foam containing spherical beads of the present invention. In this case, punching, cutting, polishing, etc. may be performed after bonding both foams together in advance, or
Alternatively, after processing such as cutting, they may be shaped into a substantially final shape and then bonded together to form a cosmetic applicator.

[Effects of the Invention] The foam constituting the cosmetic applicator material of the present invention contains spherical beads. Therefore, when cutting a foam by applying a knife to it, the skeleton of the foam is cut by the knife, but since the spherical beads are round and hard, the knife slides on the surface of the spherical beads, and the spherical beads are not cut. First, the skeleton near the root of the spherical bead is cut off, avoiding the spherical bead. As a result, when the cosmetic applicator material of the present invention is cut with a knife, spherical beads are precipitated in a convex shape on the surface of the skeleton portion of the cut surface.

The foam that is the cosmetic applicator material of the present invention is cut into a desired shape and processed to produce a cosmetic applicator. A state is reached in which spherical beads are precipitated in a convex shape on the surface of the skeleton portion of the surface. Since the precipitated spherical beads have round surfaces and no obtuse angle parts, they do not give a tingling or stiff feeling even when they come into contact with the skin during application, and are extremely less irritating to the skin.

In addition, when applying cosmetics, the spherical beads are in point contact with the skin, so the contact area between the skin and the applicator is small. Very little stimulation. As described above, the cosmetic applicator made of the cosmetic applicator material of the present invention has an extremely good usability.

Furthermore, according to the present invention, since spherical beads are attached to the outer surface of the cosmetic applicator, the outer surface is not flat unlike conventional foam skeletons, but minute irregularities are formed by the spherical beads. There is.

These fine irregularities (between the spherical beads) hold the cosmetic on the outer surface of the foam skeleton, so you can apply the cosmetic by simply applying it to the applicator and lightly spreading it on the skin. To provide an applicator with excellent usability, which does not cause a feeling of irritation, does not cause the application of makeup under excessive pressure, and does not cause the cosmetic to become uneven.

In order to make a cosmetic applicator using the cosmetic applicator material of the present invention, it is cut, punched, milled, polished, etc. by a known method to form a cosmetic applicator into an arbitrary shape, such as a cosmetic puff or a cosmetic tip. etc., as long as it is finished.

[Brief explanation of drawings]

FIG. 1 is a schematic sectional view showing an embodiment of the cosmetic applicator material of the present invention. 1... Foam skeleton, 2... Spherical beads, 3...
Foam pores.

Claims (1)

[Scope of Claims] 1. A cosmetic applicator material, characterized in that the cosmetic applicator material is made of a foam, and spherical beads are contained in the foam. 2. A method for manufacturing a cosmetic applicator material, which comprises mixing spherical beads with a foaming raw material and then subjecting the mixture to a foaming treatment to form a foamed molded product.