JP4131695B2 - Method for producing solid cosmetic - Google Patents

Description

  The present invention relates to a method for producing a solid cosmetic and a solid cosmetic obtained by the production method.

  In recent years, there has been a demand for solid cosmetics that have an appearance that emphasizes the brilliant feeling in producing an attractive appearance in solid cosmetics containing a glittering pigment. This requirement is particularly noticeable in solid cosmetics used for the eyes, such as eye shadows and eye colors.

  In the conventional molding of solid cosmetics, the surface of the woven fabric or paper is added to the surface of the obtained solid cosmetic due to the arrangement of the woven fabric or paper between the raw powder cosmetic and the mold. The shape was transferred, the surface was not smooth, and the appearance was not bright.

  For example, in the molding of solid cosmetics, a method has been proposed in which moldability is ensured by placing a woven fabric or paper between the raw powder cosmetics and the molds, and the molded products are stably produced. (See Patent Document 1). However, since the surface shape of the woven fabric is transferred to the surface of the obtained solid cosmetic, the surface is not smooth and the appearance is not bright.

  A flexible sheet is placed between the powder cosmetic and the mold having elasticity, and an attempt is made to prevent the sheet from lifting the surface of the solid cosmetic by recovering the elasticity of the mold and the sheet after the press is released. Technology is also known (see Patent Document 2). An example of the flexible sheet is a soft napkin paper. However, even if such a sheet is used, the brightness of the appearance of the solid cosmetic is poor as in Patent Document 1.

  In the same molding, a technique for improving the finishing of the upper surface by arranging a cloth, paper, polyethylene sheet or the like between the powder cosmetic and the stamping die is also known (see Patent Document 3). However, when the adhesion between the sheet and the powder is strong, the sheet may lift the surface of the solid cosmetic when the press is released after molding, and stable production becomes difficult.

  As described above, each of the above-described conventional techniques describes that a woven fabric, paper, and a film having a smooth surface are disposed between a powder cosmetic material as a raw material and a stamping die. However, in these methods, even if it can be stably molded, the surface smoothness of the obtained solid cosmetic becomes poor. On the other hand, even if solid cosmetics with a smooth surface can be produced using a smooth film, stable production is difficult, or solid cosmetics with an appearance that emphasizes radiance are sufficiently stable. Can not.

Japanese Patent Laid-Open No. 5-77801 Japanese Patent No. 2787000 Japanese Patent Laid-Open No. 8-119833

  Accordingly, an object of the present invention is to provide a method for producing a solid cosmetic that can eliminate the various disadvantages of the above-described conventional technology.

  In the case where the powder cosmetic material as a raw material is molded into a predetermined shape using a film, the present inventors have a deformation rate in the thickness direction within a specific range, and the critical surface tension is a specific value or more. It has been found that by using a film, a solid cosmetic excellent in surface smoothness can be stably obtained, and a solid cosmetic having an appearance excellent in glitter can be stably produced.

That is, in the present invention, when a powder cosmetic for producing a solid cosmetic is compression-molded using a mold, the critical surface tension at 25 ° C. is 3 between the powder cosmetic and the mold. The present invention provides a method for producing a solid cosmetic, in which compression molding is performed by interposing a film having a deformation rate of 1 to 8% in a thickness direction of 5 × 10 ⁻⁴ N / cm or more.

  Moreover, this invention provides the solid cosmetics manufactured by the said manufacturing method.

  According to the production method of the present invention, it is possible to stably obtain a solid cosmetic excellent in surface smoothness by using a specific film, and in particular, a solid cosmetic having an appearance excellent in glitter. Can be stably produced.

Hereinafter, the present invention will be described based on preferred embodiments with reference to the drawings. The production method of the present invention can be carried out by using, for example, a press molding apparatus shown in FIG. In the press molding apparatus of FIG. 1, a powder cosmetic 1 as a raw material is filled in an inner dish 2 supported by a core 8 in a press concave mold 7. The powder cosmetic 1 is weighed and filled in advance. A pressing convex die 6 as a pressing die is driven downward by a pressurizing device 9 at a predetermined speed. The lower surface of the press convex die 6 is compacted into a predetermined shape by compacting the powder cosmetic 1 in the inner dish 2 through a press film (hereinafter also simply referred to as a film) 3. After maintaining the pressure state for a certain time as necessary, the press convex die 6 is driven upward at a predetermined speed by the pressure device 9 and its lower surface is separated from the film 3. The film 3 is unwound from the unwinding device 4 and taken up by the take-up device 5. When the press convex die 6 rises, the film 3 is pitch-fed by the winding device 5 with the width of the inner tray 2 and the surface in contact with the powder cosmetic is renewed. The intermediate dish 2 after the press is released is taken out from the press concave mold 7 by raising the core 8. The pressurizing device 9 is a hydraulic cylinder, a servo motor or the like. In this embodiment, with respect to the medium dish area of 3 cm ² , the applied pressure is 0.1 to ² t, and the pressure on the surface of the powder cosmetic is 0.3 to 6.0 × 10 ⁷ Pa. The press surface shape of the press convex mold 6 may be a flat surface, or may have irregularities such as patterns and characters. Moreover, it is preferable from the point of mold release property that the speed | rate which detaches | leaves the film 3 from a to-be-molded article surface after a press is 3-8 cm / s.

Surprisingly, the present inventors measured the film properties such as surface roughness and friction coefficient of various films and compared them with the release properties from the solid cosmetics. It became clear that there was almost nothing to do with type. As a result of further investigations, it was found that the smaller the deformation rate in the thickness direction of the film 3, the better the releasability. This is because the powder constituting the surface of the solid cosmetic material is pressed against the surface of the film 3 at an extremely high pressure during molding. Therefore, if the film 3 is easily deformed, the powder is sunk into the film 3 and captured. This is probably because the powder on the surface peels off. It has also been found that good release properties can be obtained because the critical surface tension of the film 3 is high. That is, in the present invention, the critical surface tension of the film 3 at 25 ° C. is 3.5 × 10 ⁻⁴ N / cm or more, preferably 3.7 × 10 ⁻⁴ N / cm or more, more preferably 3.9 × 10. ^-4 N / cm or more and the deformation rate in the thickness direction of the film is 1 to 8%, preferably 2.5 to 8%, more preferably 4 to 8%. Releasability is ensured. The upper limit value of the critical interfacial tension is not particularly limited and is preferably as high as possible. However, if the upper limit value is about 5.5 × 10 ⁻⁴ N / cm, particularly about 5.0 × 10 ⁻⁴ N / cm, The releasability intended by the invention is sufficiently ensured.

The critical surface tension of the film 3 is that the contact angle θ of the solid surface is measured for a plurality of liquids (surface tension γ) having different surface tensions (temperature 25 ° C.), and extrapolated to cos θ = 1 in the plot of cos θ−γ. Value γ _c (FIG. 2). The smaller the critical surface tension γ _c of the film 3, the larger the liquid contact angle.

The deformation rate in the thickness direction of the film 3 can be measured using, for example, a micro compression tester (for example, MCTM-500 manufactured by Shimadzu Corporation). The measurement conditions are as follows. Continue to compress the film indenter diameter 50μm at a constant speed 0.77mN / s, to measure the deformation amount D ₁ [mu] m when the load has reached 3.0 × 10 ⁷ Pa. And the deformation rate S of the thickness direction of the film 3 is computed from the following formula | equation (1). In the formula, D represents the thickness (μm) of the film 3 before compression.
S = D ₁ / D × 100 (1)

  When placing the film 3 on the stage, care should be taken that the film 3 is in close contact with the stage so that no foreign matter or space exists between the film 3 and the stage. The film 3 is cut as small as possible, and the cut portion is not thicker than the thickness of the film 3. Even when such a treatment is performed, when contact of the indenter with the film 3 is detected at a point thicker than the actual thickness of the film 3, the section in which the film 3 is actually compressed (for example, the load) ) And a section where the film 3 is not actually compressed (for example, a section in the initial stage of the load when the amount of deformation is greatly increased even though the load is extremely low). Is reset to the contact start point of the film 3, that is, zero load and zero deformation, and the deformation rate S is calculated again.

The thickness of the film 3 is preferably 15 to 80 μm, particularly preferably 20 to 60 μm. The elastic modulus in the in-plane direction of the film 3 at a strain of 0.5% is preferably 2 × 10 ⁸ to 50 × 10 ⁸ Pa, particularly 4 × 10 ^{8 to} 48 × 10 ⁸ Pa. This is because when the thickness and the in-plane elastic modulus of the film 3 are in this range, the releasability between the powder cosmetic and the film 3 is further improved. The elastic modulus is measured under the condition where the film 3 is pulled at a tensile rate of 0.1% / s and the strain is 0.5%.

  The film 3 has a surface roughness Ra (JIS B 0601-1994) of 0.001 to 0.2 μm, particularly 0.05 to 0.15 μm, while maintaining good release properties. This is preferable from the viewpoint of obtaining a solid cosmetic excellent in smoothness. However, in the present invention, if the critical surface tension and deformation rate of the film 3 satisfy the numerical values described above, the releasability is improved regardless of the surface roughness Ra of the film 3, and the solid cosmetic is Appearance is improved.

  Examples of the film 3 having physical properties as described above that can be preferably used in the present invention include polyvinylidene chloride (PVDC) and polyethylene terephthalate (PET).

  When the above-described film 3 is used and the compression surface of the press convex die 6 that is a pressing die is three-dimensionally formed and compression-molded, a solid cosmetic having an appearance with an excellent three-dimensional appearance is obtained. This is because the gloss of each surface constituting the solid cosmetic is improved, and the boundary between the surfaces becomes clear. In addition, when the glittering powder is coated on the solid cosmetic of the present invention, there is also an effect that a solid cosmetic excellent in the shedding resistance of the glittering powder can be obtained. The reason for this is that the smoother the surface of the solid cosmetic, the larger the contact area that can be secured to the surface of the solid cosmetic by the glittering powder that is generally plate-like.

  The powder cosmetic for producing the solid cosmetic used in the present invention generally contains various powders and oil components. Examples of the powder include various glitter pigments usually used in the cosmetic field. There are various shapes such as a plate shape, a spherical shape, and a rod shape, but a plate shape is preferable from the viewpoint of glitter after application. The shape of the plate-like powder includes a scale shape, a flat shape, and the like. Examples of the glitter powder include mica titanium, fish scale foil, bismuth oxychloride, synthetic phlogopite, iron oxide-coated mica, and gold leaf powder. Further, by using a surface-coated bright pigment obtained by coating a base powder such as mica titanium, phlogopite, glass powder, or silica powder with a pigment, variations in bright color can be expanded. Specific examples of surface-coated bright pigments include mica titanium; titanium oxide-coated synthetic phlogopite; iron oxide or black iron oxide-coated mica titanium, iron oxide / black iron oxide multilayer-coated mica titanium, titanium oxide / silicon oxide / titanium oxide Multilayer Titanium Mica, Carmine Coated Mica Titanium, Carmine / Conjou Multilayer Coated Mica Titanium, Iron Oxide / Carmine Multilayer Coated Mica Titanium, Pepper Coated Mica Titanium, Iron Oxide / Conjugate Multilayer Mica Titanium, Chromium Oxide Coated Mica Titanium Pigment-coated mica titanium such as titanium mica; titanium oxide-coated glass powder, iron oxide / titanium oxide multilayer coated glass powder, coated glass powder such as glass powder coated with metal such as gold, silver and nickel, etc., titanium oxide-coated silica powder , Titanium oxide / silicon oxide / titanium oxide multilayer coated mica silica powder, iron oxide / acid Titanium multilayer coated silica powder, gold, coated silica powder and the like of the silver and the silica powder such as a metal and a coating of such as nickel and the like. These powders can be used alone or in combination of two or more.

  The various glitter pigments are available as commercial products. For example, Titanium Super Gold, Timilon Starlight Gold (above Merck), Flamenco Gold, Flamenco Sparkle Gold, Flamenco Summit Gold (above Engelhard Asia Pacific), Prestige Gold, Prestige Bright Gold ( As mentioned above, the iron oxide-coated mica includes: Cororona Bordeaux (Merck), Croizone Blue Flambe (Engelhard Asia Pacific), Prestigious Bronze (Eckart); Iron oxide or black iron oxide-coated mica titanium For example, Colorona Bright Gold (Merck), Croizone Golden Bronze (Engelhard Asia Pacific), Prestige Lemon Gold (Eckert); / Timiron Splendid Blue (Merck) as titanium oxide / silicon oxide / titanium oxide multilayer coated titanium; Corolona Carmine Red (Merck), Cloisonone Red (Engelhard Asia Pacific); Carmine / Conju As multi-layer coated mica titanium, Cloisone violet (Engelhard Asia Pacific); As iron oxide / carmine multilayer-coated mica titanium, Cloisonne Nu Antique Red (Engelhard Asia Pacific); BV (Engelhard Asia Pacific Co.); Iron oxide / conju multilayer multi-layer coated mica titanium includes Colorona Patagonian Purple (Merck Co.), Croizone Super Green (Engelhard) Diapacific); as chromic oxide-coated mica titanium, coloro majestic green (Merck), cloisonone green (Engelhard Asia Pacific); as titanium oxide-coated synthetic phlogopite, Prominence SF (Topy Industries); gold As a glass powder coated with a metal such as silver or nickel, Metashine MC2080PS, ME2040PS, ME2025PS, ME2015PS, MC1040NB, MC1020NB, etc. (above, Nippon Sheet Glass Co., Ltd.); MC1080RS, MC1040RS, MC1020RS, MC1120RY, MC1080RY, MC1040RY, MC1020RY, MC1120RR, MC1080RR, MC104 0RR, MC1020RR, MC1080RB, MC1040RB, MC1020RB, MC1080RG, MC1040RG and the like (the Nippon Sheet Glass Co., Ltd.).

  When a glitter pigment is used as the powder contained in the powder cosmetic, the average particle diameter is preferably 15 μm or more from the viewpoint of glitter feeling, and more preferably 18 μm or more from the viewpoint of further enhancing the glitter feeling. . On the other hand, the average particle diameter is preferably 150 μm or less, and more preferably 90 μm or less, from the viewpoint of the uniformity and smoothness of the decorative film. The average particle size can be measured by a laser diffraction / scattering method using a laser diffraction / scattering particle size distribution analyzer (LA-920, manufactured by Horiba, Ltd.).

  The content of the glitter pigment is preferably 5 to 80% by weight in the powder cosmetic. In order to make the appearance of the obtained solid cosmetic material exhibit more sufficient glitter without impairing moldability, it is preferably 10 to 75% by weight.

  The glitter pigment contained in the powder cosmetic may be surface-treated using a hydrophobizing agent. This improves the sustainability of the makeup. Examples of the hydrophobizing agent include silicone oil, ester oil, fatty acid metal salt, alkyl phosphoric acid, alkali metal salt or amine salt of alkyl phosphoric acid, N-mono long chain (carbon number 8 to 22) aliphatic acyl basic Examples include amino acids and fluorine compounds having a perfluoroalkyl group.

  The oily component, which is the other component contained in the raw powder cosmetic, is the main component of the oil phase and has a role as a binder, and the adhesion of the cosmetic film to the skin when the cosmetic is applied. Important in terms. The main functions of the oil phase include moldability in product form, adhesion of a decorative film to the skin, finish and feeling of use due to bonding between powder particles, and the like. Furthermore, other functions such as coloring of the colorant and ultraviolet absorption may be exhibited. In particular, the inventors have also found that the oil component improves the releasability, and the releasability is improved when the oil component easily wets the film 3.

  Oily components that can be used in the present invention include those that are usually used in cosmetics. For example, hydrocarbons, fats and oils, waxes, hardened oils, ester oils, regardless of origin such as animal oils, vegetable oils, synthetic oils, and properties such as solid oils, semi-solid oils, liquid oils, volatile oils, etc. Fatty acids, higher alcohols, silicone oils, fluorine oils, lanolin derivatives, oily gelling agents and the like can be used.

From the viewpoint of releasability, the surface tension of the oil component is 1.5 to 3.5 × 10 ⁻⁴ N / cm, particularly 1.7 to 3.2 × 10 ⁻⁴ N / cm at 25 ° C. preferable. From the viewpoint of further improving the releasability, the oily component is preferably contained in the powder cosmetic material in an amount of 3 to 20% by weight, particularly 5 to 15% by weight. The surface tension is measured by a conventional method, for example, a droplet method.

  Specific examples of the oil component include hydrocarbons such as liquid paraffin, squalane, petrolatum, polyisobutylene, polybutene, paraffin wax, ceresin wax, microcrystalline wax, ethylene propylene copolymer, molasses, montan wax, Fischer-Tropsch wax; olive oil, Fats and oils such as castor oil, jojoba oil, mink oil, macadamian nut oil; waxes such as beeswax, carnauba wax, candelilla wax, gallow, etc .; cetyl isooctanoate, isopropyl myristate, isopropyl palmitate, octyl myristate Dodecyl, glyceryl trioctanoate, polyglyceryl diisostearate, diglyceryl triisostearate, glyceryl tribehenate, pentaerythritol rosinate , Ester oils such as neopentyl glycol dioctanoate, cholesterol fatty acid ester, N-lauroyl-L-glutamate (cholesteryl, behenyl, octyldodecyl); stearic acid, lauric acid, myristic acid, behenic acid, isostearic acid, olein Fatty acids such as acid and 12-hydroxystearic acid; higher alcohols such as stearyl alcohol, cetyl alcohol, lauryl alcohol, oleyl alcohol, isostearyl alcohol, behenyl alcohol, octyldodecanol; low polymerization dimethylpolysiloxane, high polymerization dimethyl Polysiloxane, methylphenyl polysiloxane, decamethylcyclopentasiloxane, octamethylcyclotetrasiloxane, polyether modified polysiloxane, polyoxy Silicone oils such as alkylene polysiloxane / methylpolysiloxane copolymer, alkoxy-modified polysiloxane, cross-linked organopolysiloxane, and fluorine-modified polysiloxane; fluorine such as perfluorodecane, perfluorooctane, and perfluoropolyether Lanolin derivatives such as lanolin, lanolin acetate, lanolin fatty acid isopropyl, lanolin alcohol; dextrin fatty acid ester, sucrose fatty acid ester, starch fatty acid ester, oily gelling agents such as 12-hydroxyaluminum stearate, calcium stearate, etc. Is mentioned. An oil component can be used individually by 1 type or in mixture of 2 or more types. The oil component may be added to the powder during the production of the solid cosmetic, or the surface of the powder may be treated with the oil component in advance.

  The content of the oil component is preferably 3 to 20% by weight, more preferably 5 to 15% by weight in the cosmetic. By setting it within this range, moldability, adhesion to the skin at the time of application, and the like are improved. Further, it is possible to improve the coloration while ensuring moderate disintegration that is not excessive, and to avoid dusting and the like. Furthermore, unevenness, caking of cosmetics, swaying of the cosmetic film, and the like are prevented. Moreover, it is preferable that content of an oil-based component exists in the said range from the balance with the compounding quantity of a luster pigment.

  The powder cosmetics as raw materials may be blended with cosmetic powders other than the above-mentioned glitter pigments within the range that does not impair the effects of the glitter pigment and oil component. For example, you may mix | blend an inorganic pigment, an organic pigment, pigment | dye powder, composite powder, etc. Specifically, inorganic pigments such as conger, ultramarine, red iron oxide, yellow iron oxide, black iron oxide, titanium oxide, carbon black; zinc oxide, aluminum oxide, cerium oxide, silicon dioxide, magnesium oxide, zirconium oxide, antimony oxide, Inorganic powders such as magnesium carbonate, calcium carbonate, chromium oxide, chromium hydroxide, aluminum silicate, magnesium magnesium silicate, magnesium silicate, magnesium aluminum silicate, silicon carbide, barium sulfate; nylon powder, polymethyl methacrylate, acrylonitrile -Methacrylic acid copolymer powder, vinylidene chloride-methacrylic acid copolymer powder, urethane powder, polyethylene powder, polystyrene powder, organopolysiloxane elastomer powder, polymethyl Organic powders such as rusesquioxane powder, polytetrafluoroethylene powder, wool powder, silk powder, crystalline cellulose, magnesium stearate, zinc stearate, N-acyl lysine; organic tar pigments, lake pigments of organic dyes, etc. Dye powders: composite powders such as titanium oxide-containing silicon dioxide and zinc oxide-containing silicon dioxide. These powders may be used in combination of one or more of them. Further, these cosmetic powders may be surface-treated using a hydrophobizing agent. As the hydrophobizing agent, the same hydrophobizing agent that can be applied to the bright pigment described above can be used. These cosmetic powders can be used alone or in combination of two or more thereof, and are preferably contained in the raw material powder in an amount of 0.01 to 30% by weight.

  In addition to the cosmetic powders described above, powder cosmetics include components used in normal cosmetics, such as aqueous components, surfactants, UV absorbers, moisturizers, cooling agents, and antioxidants. Agents, cosmetic ingredients, preservatives, fragrances, and the like can be appropriately blended within a range that does not impair the effects of the present invention.

  A solid cosmetic produced in accordance with the present invention using the powder cosmetic described above as a raw material has an excellent surface smoothness and an external appearance excellent in glitter. Specifically, the solid cosmetic has a low surface roughness Ra of 1 to 3.5 μm, particularly 2 to 3 μm. A method for measuring the surface roughness Ra will be described in Examples described later.

  The solid cosmetics produced according to the present invention are suitably used in the form of eye makeup cosmetics used especially for eye shadows, eye colors, eyeliners and the like.

[Examples 1-3 and Comparative Examples 1-2]
According to the composition and method shown in Table 1, the powder phase component (1-5) is mixed, and after adding the oil phase component (6-7), the mixture is uniformly mixed and pulverized to obtain the powder cosmetic as a raw material. Obtained. Next, using the apparatus shown in FIG. 1, each film is interposed between the powder cosmetic and a pressing die having a planar shape, and the powder cosmetic is press-filled in a medium dish (press pressure 3.0 × 10 ⁷ Pa). Thus, a solid cosmetic (eye shadow) was obtained. The molded product used for the evaluation of the three-dimensional appearance is molded using a stamping tool with a three-dimensional shape (height difference of 1 mm), and the molded product used for the evaluation of the shedding resistance of the glittering powder is the surface of the planar molded product. Are coated with glittering powder (average particle size 80 μm). In Table 1, PVDC represents polyvinylidene chloride, PET represents polyethylene terephthalate, OPP represents stretched polypropylene, and PVC represents polyvinyl chloride. Moreover, the brand name of each component in Table 1 is as follows.
(1) Hydrophobized mica titanium: SA-Timilon Super Red (Miyoshi Kasei Co., Ltd.)
(2) Hydrophobized talc: SA-talc JA-68R (Miyoshi Kasei Co., Ltd.)

〔Evaluation methods〕
The following methods evaluated the release properties, surface roughness, external tourism radiance, stereoscopic appearance, and shedding resistance of the brilliant powder. The results are shown in Table 2.

(1) Releasability 100 solid cosmetics are produced, and the surface of the solid cosmetic is evaluated based on the peeled state of the surface after visual observation. The ratio of the passed solid cosmetics to the total solid cosmetics is calculated, and the releasability is indicated by the following index according to the yield.
◎: Percentage of accepted products is 99% or more ○: Percentage of accepted products is 90% or more Δ: Percentage of accepted products is 70% or more ×: Percentage of accepted products is less than 70%

(2) Surface roughness The three-dimensional shape within a 2 mm square of the surface of the solid cosmetic is converted into a laser-type three-dimensional shape measurement system (comb Co., Ltd. measurement system EMS2002AD-3D and Keyence Co., Ltd. displacement sensor LK-2000). The arithmetic average of the surface roughness Ra of 10 cross sections was determined. The definition of the surface roughness Ra follows JIS B0601-1994. However, in JIS B0601-1994, the evaluation length is 4 mm for Ra 0.1 to 2.0 μm and the evaluation length is 12.5 mm for Ra 2.0 to 10.0 μm. The length is 2.0 mm. This is intended to exclude the influence of the three-dimensional shape of the surface. What provided the solid shape on the surface of solid cosmetics was measured in the plane part. For samples consisting of slopes, the sample was tilted so that the measurement surface was horizontal, and slope correction was performed during data processing to prevent the influence of tilt. In addition, it was confirmed that even if the surface of the solid cosmetic material was coated with glittering powder, the same value could be obtained by measurement including this.

(3) Outer tourism shine The questionnaire survey of 10 professional panelists was conducted on the appearance of solid cosmetics. In the questionnaire, each panelist was allowed to observe the appearance of each solid cosmetic, and “Lust is good”, “Slightly good”, “I can't say either”, “Not very good”, “Lust” It was evaluated in five stages. The results are shown by the following indicators.
◎: 8 to 10 panelists who felt “good radiance” and “slightly good” ○: 6 to 7 panelists felt “good radiance” and “slightly good” Δ: 4 to 5 panelists who felt “good radiance” and “slightly good” X: 0 to 3 panelists felt “good radiance” and “slightly good”

(4) Three-dimensional appearance The questionnaire about the three-dimensional appearance of solid cosmetics was conducted for 10 professional panelists. In the questionnaire, each panelist was asked to observe the appearance of each solid cosmetic, and “three-dimensional effect is good”, “three-dimensional effect is slightly good”, “cannot say either”, “three-dimensional effect is not so good”, “three-dimensional effect” It was evaluated in five stages. The results are shown by the following indicators.
◎: 8 to 10 panelists felt “good 3D” and “good 3D” ○: 6 to 7 panelists felt “good 3D” and “good 3D” Δ: 4 to 5 panelists who felt “good 3D” and “good 3D” ×: 0 to 3 panelists felt “good 3D” and “3D”

(5) Drop-off resistance of glitter powder The solid cosmetic containing glitter powder is dropped 20 times from a height of 50 cm in a container, and solid makeup with glitter powder before dropping is applied. The reduction in the pearly appearance of the solid cosmetic appearance due to the glittering powder after dropping was evaluated by visual observation. The results are shown by the following indicators.
○: The feeling of pearl is hardly changed △: The feeling of pearl is slightly reduced ×: The feeling of pearl is greatly reduced

  As is clear from the results shown in Tables 1 and 2, the solid cosmetics obtained in accordance with the respective examples have better release properties than the solid cosmetics obtained in accordance with the respective comparative examples, and the surface. It can be seen that the roughness is low. Also, it is found that the appearance has a good glitter, and the three-dimensional molded product has a good three-dimensional appearance, and the molded powder coated with the glitter powder is difficult to drop off. .

It is a schematic block diagram which shows an example of the apparatus for enforcing the manufacturing method of this invention. It is explanatory drawing which shows the measuring method of critical surface tension.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Powder cosmetics 2 Medium dish 3 Press film 4 Feeding device 5 Winding device 6 Press convex type (press type)
7 Press concave mold 8 Core 9 Pressurizing device

Claims (7)

When powder cosmetics for producing solid cosmetics are compression molded using a mold, the powder cosmetic is composed of polyvinylidene chloride or polyethylene terephthalate between the mold and the criticality at 25 ° C. A method for producing a solid cosmetic comprising compression molding with a film having a surface tension of 3.5 × 10 ⁻⁴ N / cm or more and a deformation rate in the thickness direction of 1 to 8%. The method according to claim 1, wherein the film has a thickness of 20 to 80 μm and an in-plane elastic modulus of 2 × 10 ^{8 to} 5 × 10 ⁹ Pa at a strain of 0.5%. The manufacturing method of Claim 1 or 2 in which the said powder cosmetics contain 5 to 80weight% of glitter powder with an average particle diameter of 15 micrometers or more. The powder cosmetic any of claims 1 to 3, the surface tension at 25 ° C. containing oil components ^{1.5 × 10 -4 ~3.5 × 10 -4} N / cm 3~20 wt% The manufacturing method of crab. The manufacturing method according to any one of claims 1 to 4 , wherein a moving speed at which the film is detached from the surface of the solid cosmetic obtained by compression molding is 3 to 8 cm / s. Solid cosmetic obtained by the production method according to any one of claims 1 to 5. The solid cosmetic according to claim 6, wherein the surface roughness Ra is 1 to 3.5 µm.

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