JP4799055B2 - Pencil-type cosmetics - Google Patents

Description

  The present invention relates to a pencil-type cosmetic, and more particularly to a pencil-type cosmetic comprising a cosmetic core and an exterior shaft that encloses the cosmetic core.

In general, the pencil manufacturing process consists of (1) sawmill (large, small, wood cutting), (2) planar, (3) cutting, (4) steaming, degreasing, (5) degassing, ( 6) There are processes such as pressure injection of dye + paraffin emulsion, (7) drying, etc. in the woodworking process (1) Grooving, (2) Centering, (3) Adhesion, bonding, (4) Drying, ( There are processes such as 5) shaft making, (6) small cutting, and finally there is a painting process.
The pencil obtained by such a process is composed of a core material and a wooden shaft containing the core material. Recently, resin shafts molded as exterior shafts other than wooden shafts have been used.

Further, a pencil-type cosmetic using a cosmetic core as a core material has been proposed (see, for example, cited document 1). Pencil-type cosmetics are said to be defective because the components contained in the cosmetic core, such as fats and oils, fats, fragrances, and ethereal oils diffuse and penetrate into the wooden shaft. That is, the cosmetic core itself is thinned because the oil component is removed from the cosmetic core, and as a result, the cosmetic core is removed from the wooden shaft, and the cosmetic core is hardened or weakened due to a decrease in the oil content in the cosmetic core. It is said that this is a bug. Therefore, a pencil-type cosmetic is proposed in which a UV resin film is formed between the encapsulated cosmetic core and the wooden shaft.
Japanese Patent Laid-Open No. 10-174616

  There is a point which should be improved in the pencil type cosmetics using the conventional wax core. Since the pencil-type cosmetic is intended for application to the skin, that is, the application to the soft surface or the flexible application surface, a soft touch core is desired for the cosmetic core. For this reason, since wax and oil having a relatively low melting point are blended, a feeling of stickiness and an unpleasant coating feeling such as melting at a high temperature are given. Therefore, in order to improve the feeling of use, powders such as colored pigments, pearl pigments, and extenders are included in the framework of mesoporous ceramics and resins, etc. A lead that has been hardened by pressing a powder such as a coloring pigment, a pearl pigment, or an extender with a core to be taken out or a slight amount of wax or oil has been proposed. However, the cosmetic core formed as described above has a disadvantage that it is not able to withstand actual use because it is broken immediately after receiving an impact in the exterior shaft due to dropping or the like.

  Therefore, in view of such circumstances, the object of the present invention is a pencil-type cosmetic that is excellent in drop impact resistance, and that the cosmetic core easily disintegrates at the time of application and has excellent applicability to a flexible application surface such as skin. Is to provide.

The present inventor has improved the drop impact resistance of pencil-type cosmetics by adding spherical particles to the wood shaft used during processing or the adhesive between the resin shaft and the cosmetic core, and prevents core breakage. Thus, it has been found that the prevention of breakage of the core enables the use of a cosmetic core excellent in applicability to the skin, which is a flexible coated surface, and has led to the present invention.
That is, the present invention is characterized by having the following configuration or structure.

(1) In the pencil type cosmetics comprising a sheath axis which encloses a cosmetic stick and the cosmetic stick, pencil, characterized in that the addition of spherical particles in the adhesive for bonding the cosmetic stick and the outer shaft Cosmetics.
(2) The pencil-type cosmetic according to (1), wherein the spherical particles do not have corners on the surface.
(3) The pencil-type cosmetic as described in (1 ) above, wherein the spherical particles are true silica beads or true resin beads.
(4) The pencil-type cosmetic as described in (1) above, wherein the spherical particles are resin beads, and the resin beads are hollow resin beads or foamed resin beads.
( 5 ) The pencil-type cosmetic according to (1), wherein the exterior shaft is a wooden shaft or a resin shaft.
( 6 ) The pencil-type cosmetic according to any one of (1) to (5), wherein the average particle diameter of the spherical particles is in the range of 1 to 100 μm.
( 7 ) The pencil-type cosmetic according to any one of (1) to ( 6 ), wherein the amount of the spherical particles is 0.1 to 20 parts by mass with respect to 100 parts by mass of the adhesive. .

  According to the pencil-type cosmetic of the present invention, when the pencil-type cosmetic is dropped by adding spherical particles to the adhesive that bonds the cosmetic core and the exterior shaft, the spherical particles are shock absorbers for drop impact. Acts as a core to prevent breakage. As a result, the present invention provides a pencil-type cosmetic that can enhance the drop impact strength of the pencil-type cosmetic and enables the use of a cosmetic core that is excellent in applicability to the skin.

Hereinafter, embodiments of the pencil-type cosmetic of the present invention will be described in detail with reference to the accompanying drawings. In addition, the pencil-type cosmetics of this invention are not limited to the following embodiment, Of course, various changes can be added within the range which does not deviate from the summary of this invention.
1A and 1B are a side sectional view and a transverse sectional view of a pencil-type cosmetic according to the present invention.

As shown in FIG. 1, the pencil-type cosmetic 1 includes a cosmetic core 3 and an exterior shaft 2 that encloses the cosmetic core 3. An adhesive 4 is filled between the exterior shaft 2 and the cosmetic core 3, and spherical particles are added to the adhesive.
Examples of the exterior shaft 2 of the pencil-type cosmetic material 1 include a wood shaft obtained by processing natural wood, and a synthetic resin shaft made of a thermoplastic resin such as polystyrene, vinyl chloride resin, and ABS resin. Moreover, since the exterior shaft 2 preferably has rigidity, machinability, oil / oil resistance, etc., it is preferable to use a US incense cedar material as the wood shaft, and the resin shaft exhibits machinability. Therefore, use of a foamable resin or the like is preferable.

  Examples of the cosmetic core 3 include various cosmetic cores such as eyebrow, eyeliner, lip, lip liner, eyeshadow, and concealer. Therefore, since the cosmetic core is intended for application to the skin, that is, application to a soft surface or a flexible application surface, a core with a soft touch to the skin is desired. For example, a cosmetic core in which a powder such as a color pigment, a pearl pigment, or an extender is contained in a skeleton such as a mesoporous ceramic or resin is suitable in the present invention.

  Examples of the index that gives a soft touch to the skin include the degree of easy disintegration in the cosmetic core, that is, the amount of wear, the adhesiveness that is quantified from the breakage strength, the hardness, etc. .

  As the adhesive 4, a conventionally known adhesive can be used. The adhesive may be inorganic or organic, and the organic adhesive may be a natural polymer or a synthetic polymer. In particular, synthetic polymer adhesives are preferred because of their versatility. Synthetic polymer adhesives are roughly classified into thermosetting resins, thermoplastic resins, and rubber systems. Additives that are not desirable for cosmetics as additives, such as thermoplastic resin adhesives such as polyvinyl acetate, polystyrene, nylon, acrylic polymers, and rubber adhesives such as chloroprene rubber, nitrile rubber, SBR, urethane rubber An agent can be used, and among them, polyvinyl acetate, polystyrene and the like are preferable in the present invention.

Spherical particles are uniformly dispersed and added to the adhesive 4. The shape of the spherical particles is not necessarily a true sphere, and may be a shape that does not have a corner on the surface. However, the spherical particles in the present invention are preferably close to true spheres.
The spherical particles are preferably those that can be added to cosmetics and / or those that do not melt into the cosmetic core, etc. Specific spherical particles may be inorganic powders such as silica beads, nylon beads, PMMA ( (Polymethacrylmethyl acrylate) beads and urethane beads may be used, and resin beads are particularly preferable. The resin beads may be hollow inside, or may be foamed resin beads.

The average particle diameter of the spherical particles is preferably in the range of 1 to 100 μm, particularly in the range of 2 to 20 μm. If the average particle diameter of the spherical particles is less than 1 μm, the drop impact resistance of the pencil-type cosmetic cannot be sufficiently increased. On the other hand, when the average particle diameter of the spherical particles exceeds 100 μm, the adhesiveness may be lowered.
The adhesive is dissolved in a solvent or provided as an emulsion, and the amount of spherical particles in the adhesive ranges from 0.1 to 20 parts by mass with respect to 100 parts by mass of the adhesive (excluding the solvent). The range of 0.5-10 mass parts is especially preferable. If the blending amount of the spherical particles is less than 0.1 mass, sufficient drop impact resistance cannot be imparted to the pencil-type cosmetic. On the other hand, when the blending amount of the spherical particles exceeds 20 parts by mass, the adhesiveness is lowered.

About the manufacturing method of the pencil-type cosmetics using such an exterior shaft and cosmetics core, it can implement as follows, for example.
Applying or impregnating the above-mentioned adhesive containing spherical particles to the surface of the grooves of the pair of halves (slat members) that will be the exterior shaft, that is, the surface where the core material contacts and / or the entire joint surface of the slats I do. Separately, the core material of the cosmetic material extruded into a core shape by an extruder or the like, or the hot melted cosmetic material is filled into a core mold, and the core material is cooled and solidified and inserted into the groove, A slat material, which is a half that has been subjected to the same treatment, is combined and bonded, and is shaved into a shaft by a conventional method to produce a pencil-type cosmetic.

Another method is to bond the half slats without loading the core to the pair of halves (slats), and shaving it into a shaft by a conventional method, To make. Alternatively, a pencil-shaped cylindrical object is made by punching a bar-shaped central portion carved from wood into a pencil shape with a drill or the like. Thereafter, the above-mentioned adhesive is applied to the inner wall surface by spraying, impregnating, dipping or the like on the surface in contact with the core material. This is poured into a cosmetic core material which is heated and dissolved, and then cooled and solidified to produce a pencil-type cosmetic material.
In the pencil-type cosmetics configured as described above, a cosmetic core excellent in drop impact resistance and excellent in applicability to a flexible application surface such as skin can be used.

Hereinafter, the present invention will be described with reference to examples. However, the present invention is not limited to the following examples.
<Prescription of cosmetics and manufacturing method of cosmetic core>
The following eye shadow formulation examples are shown.
(Eyeshadow Formula 1)
・ Talc 15 parts by mass ・ Kaolin 75 parts by mass ・ Pentonite 4 parts by mass ・ Carbon black 6 parts by mass The above ingredients are uniformly mixed with a mixer, 20 parts by mass of purified water is added, and after kneading with a roll machine, extrusion molding is performed. It was formed into a rod-shaped product having a diameter of 4.0 mm and a thickness of 100 mm by a machine, and dried at a temperature of 150 ° C. for 2 hours to completely remove moisture. The dried rods were arranged in a ceramic container, and the atmosphere in the container was completely replaced with nitrogen gas.
This was heat-treated by holding it at 650 ° C. for 1 hour in an inert atmosphere with an electric furnace.

(Eyeshadow prescription 2)
-Microcrystalline wax 20 parts by mass-Sugar ester 10 parts by mass-Carnauba wax 5 parts by mass-Candelilla 15 parts by mass-Mica 15 parts by mass-Talc 15 parts by mass-Carbon black 20 parts by mass The above ingredients are heated and mixed with stirring. Then, it was molded into a rod-shaped product having a diameter of 4.0 mm and a thickness of 100 mm by an extruder, and cooled and solidified to obtain a core material.

Example 1
An adhesive containing 2 parts by mass of nylon powder (average particle size: 10 μm) with respect to 100 parts by mass of vinyl acetate emulsion adhesive (resin concentration: 50% by mass) is applied to the surface of the slat material to be the exterior shaft, The core material of the eye shadow prescription 1 is placed in the groove and bonded together with a slat material that is a half processed in the same manner, and is shaved into a shaft by a conventional method to produce a pencil-type cosmetic. Evaluation of the broken core when the pencil-type cosmetic was dropped, evaluation of the broken core at the time of shaving, and evaluation of its usability were performed. The results are shown in Table 1.

(Example 2)
Example 1 except that an adhesive containing 2 parts by mass of crosslinked PMMA particles (average particle size: 10 μm) with respect to 100 parts by mass of a vinyl acetate emulsion adhesive (resin concentration: 50% by mass) was used as the adhesive. A pencil-type cosmetic is produced in the same manner. Evaluation of the broken core when the pencil-type cosmetic was dropped, evaluation of the broken core at the time of shaving, and evaluation of its usability were performed. The results are shown in Table 1.

(Comparative Example 1)
A pencil-type cosmetic is produced in the same manner as in Example 1 except that an adhesive containing only a vinyl acetate emulsion adhesive (resin concentration: 50% by mass) is used. Evaluation of the broken core when the pencil-type cosmetic was dropped, evaluation of the broken core at the time of shaving, and evaluation of its usability were performed. The results are shown in Table 1.
(Reference Example 1)
As an adhesive, an adhesive containing only a vinyl acetate emulsion adhesive (resin concentration of 50% by mass) is used, and the above-mentioned eye shadow prescription 2 (a solid wax core formulation conventionally used for reference and reference) A pencil-type cosmetic is produced in the same manner as in Example 1 except that the above is used. Evaluation of the broken core when the pencil-type cosmetic was dropped, evaluation of the broken core at the time of shaving, and evaluation of its usability were performed. The results are shown in Table 1.

<Evaluation of broken core when dropped>
Sharpen one end of the pencil-type cosmetic material, cover it with an AS resin transparent cap, and drop it horizontally on a cedar board with a thickness of 30 mm to a thickness of 30 mm until it breaks up to 10 times. The “drop strength” was calculated by the following equation, where “the number of drops” and the number of breaks of the core of the protruding portion were “the number of breaks”.
Drop strength = Σ {(number of drops-1) × (number of breakage)}

For example, if the number of broken lines at the fifth time is 3, the number of broken lines at the sixth time is five, and the number of broken lines at the seventh time is two, {(5-1) × 3} + {(6 −1) × 5} + {(7-1) × 2}, the “drop strength” is “49”. Also,
Further, if there is no breakage at the 10th time, it is considered that 10 pieces are broken at the 11th time, and the “drop strength” is {(11−1) × 10} and is “100”. In addition, when only 2 breaks at the 10th time, for example, {(10-1) × 2} + {(11-1) × 8} and the drop strength becomes 98.
<Evaluation of broken core during cutting>
The pencil-type cosmetic is sharpened until the core comes out 5 to 6 mm, and whether or not the core breaks during the cutting is confirmed with 10 samples.
<Evaluation during use>
The feeling of use when using a pencil-type cosmetic was divided into three grades: good, normal, and sticky, and was evaluated in three stages.

  The pencil-type cosmetic of the present invention is one in which spherical particles are added to an adhesive between a wooden shaft or a resin shaft and a cosmetic core used in processing, and thereby the drop-type impact strength of the pencil-type cosmetic is reduced. It is a pencil-type cosmetic that is improved and has excellent industrial applicability without broken cores.

1A and 1B are a side sectional view and a transverse sectional view of a pencil-type cosmetic according to the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pencil type cosmetics 2 Exterior shaft 3 Cosmetic core 4 Adhesive

Claims (7)

A pencil-type cosmetic comprising a cosmetic core and an exterior shaft containing the cosmetic core, wherein spherical particles are added to an adhesive that bonds the cosmetic core and the exterior shaft. The pencil-type cosmetic according to claim 1, wherein the spherical particles have no corners on the surface. The pencil-type cosmetic according to claim 1, wherein the spherical particles are true silica beads or true resin beads. The pencil-type cosmetic according to claim 1, wherein the spherical particles are resin beads, and the resin beads are hollow resin beads or foamed resin beads.   The pencil-type cosmetic according to claim 1, wherein the exterior shaft is a wooden shaft or a resin shaft. The pencil-type cosmetic according to any one of claims 1 to 5 , wherein the average particle diameter of the spherical particles is in the range of 1 to 100 µm. The pencil-type cosmetic according to any one of claims 1 to 6 , wherein a blending amount of the spherical particles is in a range of 0.1 to 20 parts by mass with respect to 100 parts by mass of the adhesive.

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