JP2001220317A - Method for producing solid powdery cosmetic - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for producing a solid powdery cosmetic having high shape retainability and good feeling after applied without the need of significantly altering conventional production equipment therefor. SOLUTION: This method for producing a solid powdery cosmetic comprises the following process: a mixture of powder and oil is sieved using an ultrasonic vibratory sieve 100-800 μm in mesh size and the resultant mixture passed through the sieve is subjected to pressure molding to a specified shape.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a solid powder cosmetic such as a foundation and an eye shadow.

[0002]

2. Description of the Related Art Generally, in order to produce a solid powder cosmetic, one or more powders, which are main components, are gently mixed with a rocking mixer or the like, and then crushed and mixed. An oil agent containing a solid oil and / or a liquid oil is mixed, and the obtained mixture is pulverized and mixed, sieved, and then compression-pressed.

[0003] However, in the above-mentioned production method, it is possible to improve the shape-retaining property of the solid powder cosmetics while maintaining a high level of the tendency to enhance their functions, for example, a moist feeling and a smooth feeling at the time of application. It's getting harder. In particular, with the diversification of powders used, simply changing the mixing conditions and compression molding conditions so as to satisfy the shape retention properties tends to cause caking, and impairs the aesthetics of the molded product of the solid powder cosmetic. In addition, there is a drawback that the cosmetic composition such as puffs is poorly removed from cosmetics. Therefore, Japanese Patent Application Laid-Open No. 7-26
No. 24 proposes a new method for producing a solid powder cosmetic, but requires new equipment and greatly increases the burden of production costs.

Accordingly, an object of the present invention is to provide a method for producing a solid powder cosmetic having high shape retention and feeling of use without greatly changing conventional production equipment. Another object of the present invention is to provide a method for producing a solid powder cosmetic which is less likely to crack or crack and has high impact resistance.

[0005]

According to the present invention, a powder is mixed with an oil agent to obtain a mixture.
What has achieved the object by providing a method for producing a solid powder cosmetic in which a mixture is sieved with an ultrasonic vibrating sieve equipped with a 00 μm sieve, and then the mixture passed through the sieve is pressed into a predetermined shape. It is.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The solid powder cosmetic of the present invention is described below.
A description will be given based on the preferred embodiment. First, each raw material used in the method for producing a solid powder cosmetic of the present invention will be described. Powders and oils are used as the raw materials.

As the powder, extenders and coloring pigments usually used in cosmetics are used. For example, an inorganic powder such as mica or talc or a composite thereof, an organic powder such as polyamide or a composite thereof, or a composite powder of the inorganic powder and the organic powder is used.

[0008] In particular, powders whose surfaces are originally hydrophobic or powders whose surfaces have been subjected to a hydrophobic treatment are preferred because they have a better feeling in use. The hydrophobizing treatment may be performed, for example, using a silicone oil, a metal salt of a fatty acid, an alkyl phosphoric acid, an alkali metal salt or an amine salt of an alkyl phosphoric acid, an N-mono long chain (having 8 to 22 carbon atoms).
The treatment is performed using a hydrophobizing agent such as an aliphatic acyl basic amino acid or a fluorine compound having a perfluoroalkyl group. There is no particular limitation on the method of hydrophobizing the powder. The treatment amount of the hydrophobizing agent for the powder is 0.05 to 2
It is preferably 0% by weight, particularly preferably 2 to 10% by weight.

The average particle size of the powder depends on the specific application of the solid powder cosmetic, but is generally 0.01 to 250 μm.
m, particularly preferably 0.05 to 200 μm.

An example of the powder used in the present invention is a mixed powder containing the following components or a mixed powder similar thereto. Silicone-treated mica (average particle size: 10 to 25 μm): 15 to 60% by weight Silicone-treated talc (average particle size: 7 to 15 μm): 5 to 20% by weight Spherical silicone resin (average particle size: 3 to 20 μm): 5 to 20% by weight % Silicon-treated titanium oxide: 0 to 10% by weight Silicone-treated color pigment: 1 to 5% by weight

The oil agent is used for the purpose of imparting a moist feeling to the solid powder cosmetic and improving the impact resistance of the solid powder cosmetic. Examples of the oil include solid and semi-solid oils such as petrolatum, lanolin, ceresin, microcrystalline wax, carnauba wax, candelilla wax, higher fatty acids, higher alcohols, etc .; squalane, liquid paraffin, ester oil, diglyceride, triglyceride, silicone oil, etc. Fluid oil component; fluorine-based oils such as perfluoropolyether, perfluorodecalin, and perfluorooctane. The oil agent may be used alone or in combination of a plurality of types.
Up to about 0% by weight, especially 1 to 20% by weight, more preferably 1.5 to
It is preferable to be blended so as to be 15% by weight.

In order to carry out the method for producing a solid powder cosmetic according to the present invention, first, the powder is finely pulverized to a predetermined particle size using, for example, an atomizer. When the powder is composed of two or more mixed powders, the mixed powders are roughly mixed using, for example, a rocking mixer before the fine pulverization.

[0013] The finely ground powder is then mixed with the oil agent. For mixing, for example, a Henschel mixer is used. Thereafter, the powder mixed with the oil agent is pulverized once again using an atomizer or the like.

The mixture of the powder and the oil agent thus obtained is then sieved through a sieve having a predetermined mesh size. As a result, the lumps present in the mixture are removed, and as a result, the texture of the resulting solid powder cosmetic is improved. In addition, the uniformity of the surface is improved. Further, the shape retention and the impact resistance of the product are improved.

It is effective to use a sieve mesh having a mesh size of 100 to 800 μm specified in JIS Z8801. With a sieve having an opening diameter of less than 100 μm, clogging easily occurs and sieving is impossible, and with an opening diameter of more than 800 μm, the texture and shape retention of the obtained solid powder cosmetic are improved. I can't hope. From the viewpoint of further improving the texture, surface uniformity, shape retention, and impact resistance of the obtained solid powder cosmetic by making the mixture more homogeneous, the opening diameter is preferably 100 to 600 µm. Further, if the wire diameter of the sieve mesh is too small, the durability of the sieve is reduced. If the wire diameter is too large, the opening ratio of the sieve is reduced, and the sieving ability is reduced.
μm, particularly preferably 80 to 450 μm.

In order to sieve the mixture, an ultrasonic vibrating sieve equipped with a sieve having the mesh size is used. Types of sieve devices include vibration sieve, in-plane motion sieve, and rotary sieve.
In the present invention, an ultrasonic vibrator is directly or indirectly connected to the sieve mesh of the vibrating sieve, and the mixture is clogged in the sieve mesh by using an ultrasonic vibrating sieve in which the entire sieve mesh is ultrasonically vibrated. And the mixture can be efficiently sieved to homogeneity. In particular, when a vibrating sieve is used, the mixture vibrates not only in a direction parallel to the mesh surface but also in a direction perpendicular to the mesh surface, so that the processing capacity is increased.

The output of the ultrasonic oscillator in the sieving using the ultrasonic sieve is 20 to 15,
2,000 W / m ² , especially 100 to 12,000 W / m ² , is preferable because clogging is prevented and high processing performance can be obtained.

Next, the mixture passed through the sieve screen by the above-described sieving is subjected to pressure molding to obtain a solid powder cosmetic. In this case, the mixture that has passed through the sieve screen is immediately pressure-formed, and no operation is performed on the mixture between sieving and pressure-forming, which is a result of the setting of the mixture caused by external force. Aggregate formation is prevented, and a solid powder cosmetic having good appearance and high impact resistance is more preferable. In order to press-mold the mixture immediately after passing through the sieve mesh, for example, the ultrasonic vibrating sieve is placed above a hopper of a forming machine used for the pressure forming, and the above-mentioned mixture having passed through the sieve mesh is used. The mixture may be supplied directly to the hopper.

As an example of the method of the pressure molding, a method of filling the mixture into a container having a predetermined shape, for example, a shallow bottom receiving tray made of various metals or resins, and compression-molding the mixture at room temperature can be mentioned. The molding pressure at this time can be appropriately determined according to the type, size, and shape of the intended solid powder cosmetic, but is 981 kPa or less, particularly 98.1 to 491 k.
Pa is preferable from the viewpoint that caking does not occur and the impact resistance of the solid powder cosmetic is increased.

Various additives for further improving the performance and quality of the product can be appropriately added to the solid powder cosmetic produced by the method of the present invention as long as the effects of the present invention are not impaired. Examples of the additive include an ultraviolet absorber, a surfactant, an antioxidant, a dye, a thickener, a pH adjuster, a fragrance, a humectant, a blood circulation enhancer, a cooling agent, an antiperspirant, a bactericide, and a skin activating agent. Agents and the like can be used. These additives are preferably mixed with the powder when the additive is a solid that does not dissolve in the oil, and the powder after mixing is preferably mixed with the oil, wherein the additive is a liquid or the oil. When it is a solid that dissolves in the oil, it is preferable to mix the oil with the oil and mix the mixed oil with the powder.

The present invention is not limited to the above embodiment. For example, the solid powder cosmetics produced by the production method of the present invention can be applied not only to foundations and eye shadows, but also to other cosmetics, for example, makeup cosmetics such as face powder and blusher.

[Examples 1 to 7 and Comparative Examples 1 to 4] The components I shown in Table 1 which have been finely pulverized using an atomizer in advance.
Was mixed with the mixed powder of the above using a Henschel mixer to obtain a mixture. This mixture was pulverized again using an atomizer. This mixture was sieved using a vibration type sieving apparatus. The mesh diameter of the used sieve mesh is as shown in Table 2. Table 2 also shows whether or not sieving was performed using an ultrasonic vibration sieve. The mixture passed through a sieve mesh, inner diameter 52mm, depth 4mm,
The mixture was filled in a 0.7 mm-thick aluminum shallow-bottom receiving dish, and compression-pressed at 3.43 MPa to obtain a solid powder foundation.

With respect to the obtained solid powder foundation, uniformity of surface, impact resistance and usability were evaluated by the following methods. Table 2 shows the results.

[Evaluation Method of Surface Uniformity] After applying a constant load of 0.2157 Pa (22 gf / m ² ) to the puff and rubbing the surface of the solid powder foundation 50 times, the caking of the surface was carried out by five expert panelists. The incidence was visually evaluated on a five-point scale. The average score was used as a criterion for “◎” to “X”.・ Score 5: Caking occurrence rate: 0% 4: 0% <Caking occurrence rate ≦ 15% 3: 15% <Caking occurrence rate ≦ 30% 2: 30% <Caking occurrence rate ≦ 50% 1: 50% <Caking occurrence Rate ≦ 100% ・ Criteria ◎: 4.5 or more and 5 or less ○: 3.5 or more and less than 4.5 Δ: 2.5 or more and less than 3.5 ×: less than 2.5

[Evaluation Method of Impact Resistance] The solid powder foundation stored in the storage dish is stored in a plastic compact container, and the compact container is placed on a plywood plate having a height of 50 cm and a thickness of 25 mm. Was repeatedly dropped, and the number of times until abnormalities such as chipping, cracking and cracking occurred was measured. The larger the number of times, the higher the impact resistance is evaluated. The measurement was performed at N = 50.

[Evaluation Method of Usability] Five specialized panelists took the solid powder foundation with a special puff and applied it to the face. The usability was evaluated according to the following five-point scores. The average score is the following "◎" ~
The criterion of "x" was used.・ Score 5: Very good 4: Good 3: Normal 2: Bad 1: Very bad ・ Criteria ◎: 4.5 or more and 5 or less ○: 3.5 or more and less than 4.5 △: 2.5 or more and less than 3.5 ×: less than 2.5

[0027]

[Table 1]

[0028]

[Table 2]

As is evident from the results shown in Table 2, the solid powder foundations of the examples manufactured according to the manufacturing method of the present invention have higher surface uniformity than those of the comparative examples. Further, it can be seen that the impact resistance is high and the usability is excellent. In Comparative Example 1 in which the ultrasonic vibrating sieve was not used, and the sieve had an opening diameter of more than 800 μm, the mixture was clogged in the sieve during sieving, and the obtained solid powder foundation had a uniform surface. Decreased. Comparative Example 2 in which an ultrasonic vibration sieve is used, but the sieve has an opening diameter of less than 100 μm, and the sieve has an opening diameter of 100 to 800.
In Comparative Example 3, which was in the range of μm but did not use an ultrasonic vibration sieve, the mixture did not pass through the sieve. In Comparative Example 4 in which the mixture was not sieved, the obtained solid powder foundation had poor surface uniformity and impact resistance, and was inferior in usability.

[0030]

According to the method for producing a solid powder cosmetic of the present invention, a solid powder cosmetic having high shape retention and feeling of use can be produced without greatly changing conventional production equipment. Further, according to the present invention, it is possible to produce a solid powder cosmetic which hardly causes cracks and cracks and has high impact resistance.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Tomokazu Convenient 2-1-3 Bunka, Sumida-ku, Tokyo Inside Kao Corporation Research Laboratory (72) Inventor Ryogo Tachibana 2-1-3 Bunka, Sumida-ku, Tokyo Kao Corporation Research Laboratory (72) Inventor Yasuhiro Miura 2-1-3 Bunka, Sumida-ku, Tokyo Kao Corporation Research Laboratory (72) Inventor Tsuyoshi Atsugi 2-1-3 Bunka, Sumida-ku, Tokyo Kao Corporation F term in company research laboratory (reference) 4C083 AB242 AB432 AD092 AD152 BB11 DD17 DD21 EE03 EE06 FF05

Claims (2)

[Claims] 1. A powder and an oil agent are mixed to obtain a mixture, and the mixture is sieved by an ultrasonic vibrating sieve equipped with a sieve having an opening diameter of 100 to 800 μm, and then the mixture passed through the sieve A method for producing a solid powder cosmetic, wherein the cosmetic is press-formed into a predetermined shape. 2. The method for producing a solid powder cosmetic according to claim 1, wherein the mixture that has passed through the sieve is immediately pressure-formed into the predetermined shape.