Manufacturing method of oil-based solid cosmetic

Abstract

To provide a method for producing an oil-based solid cosmetic having improved effect of preventing the occurrence of uneven coloring, cavities, air bubbles, pinholes, etc. on the surface. This manufacturing method uses (A) an inner tray container 1, which is a tray-shaped container 1 in which cosmetics can be filled and which can be accommodated in a cosmetics container having a filling hole 11 and an air hole 12 at the bottom of the container 1, (B) a flexible rubber mold 2, and (C) an oil-based cosmetic 4, and includes the steps of setting the rubber mold 2 on the inner tray container 1 so as to seal the opening 13 of the inner tray container 1, heating the oil-based cosmetic 4 and directing the opening 13 of the inner tray container 1 downward so as to send the oil-based cosmetic 4 through the filling hole 11 at the bottom of the inner tray container to fill the internal space formed by the inner tray container 1 and the rubber mold 2, cooling to solidify the oil-based cosmetic 4, and removing the rubber mold 2, wherein the rubber mold 2 has a blasted surface 21 that comes into contact with the oil-based cosmetic 4 and is set with the contact surface 21 facing the internal space.

Description

[Technical field]

[0001] The present invention relates to a method for producing an oily solid cosmetic preparation. [Background technology]

[0002] Generally, as one of the methods for filling oil-based solid cosmetics, when the oil-based solid cosmetics are manufactured, the top surface of the cosmetic is sealed with a rubber mold, and the oil-based cosmetic is poured into the bottom of a dish-shaped container from the outside to form the cosmetic. In particular, when the oil-based solid cosmetics are thin and have a wide surface area, air may get into the cosmetic during filling, causing cavities, bubbles, pinholes, etc., or uneven coloring of the filled product, and furthermore, cracks may occur in the cavities, resulting in a loss of aesthetic beauty. Therefore, the temperature of the cosmetic during filling and the mold temperature were adjusted, and the surface of the filled product was reheated after filling with the oil-based solid cosmetics. However, in the case of oil-based solid cosmetics having a complex pattern or design, reheating was not possible when voids or uneven coloring occurred because the pattern or design of the molded surface would be destroyed, and this was addressed by adjusting the temperature of the cosmetic during filling and the mold temperature. However, depending on the type of oil-based solid cosmetics, the above-mentioned problems could not be solved by adjusting the temperature of the cosmetic during filling and the mold temperature. Therefore, there has been a demand for a new method for producing oil-based solid cosmetics that can solve the problems of pinholes, uneven color, etc. Here, "reheating" refers to remelting the surface of the filled product after it has been heated and filled.

[0003] For example, Patent Document 1 discloses a method for filling a cosmetic material having irreversible properties into a cosmetic inner container, the method comprising the steps of sealing the upper surface of the cosmetic inner container, which is open at the top and bottom, with a filling mold and inverting the container so that the sealed upper surface faces downward and the open lower surface faces upward, and filling the cosmetic material through the lower surface of the cosmetic inner container. Patent Document 2 discloses an oil-based solid cosmetic material having two or more layers and a convex portion obtained by filling a first oil-based solid cosmetic material into a mold with a concave portion, attaching a frame to the outer periphery of the mold, filling a second oil-based solid cosmetic material in a dissolved state into the frame and allowing it to solidify, and then removing the mold, the oil-based solid cosmetic material having two or more layers and a convex portion, the mold with the concave portion having a support portion that can support at least a part of the bottom of the frame when the frame is attached. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Special Publication No. 2019-500121 [Patent Document 2] JP 2014-129270 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, the technology described in Patent Document 1 provides a cosmetic product filled in a cosmetic container that is smooth and free of color unevenness, prevents exudation, has a relatively low hardness, and is easy to apply, but does not provide a design with unevenness on the surface. Also, although it can prevent color unevenness on the surface, it cannot prevent cavities, air bubbles, pinholes, etc. Also, the technology described in Patent Document 2 can provide an oil-based solid cosmetic product with convex portions, but it cannot prevent color unevenness, cavities, air bubbles, pinholes, etc. on the surface.

[0006] Therefore, an object of the present invention is to solve the above-mentioned problems of the conventional technology and to provide a method for producing an oily solid cosmetic preparation which is more effective in preventing the occurrence of uneven coloring, cavities, air bubbles, pinholes, etc. on the surface. [Means for solving the problem]

[0007] As a result of intensive research into solving the above problems, the inventors discovered that the above object could be achieved by using an inner dish container with a filling hole and an air hole at the bottom, and a blasted rubber mold, and filling an oil-based cosmetic through the filling hole at the bottom, and thus completed the present invention.

[0008] That is, the method for producing an oily solid cosmetic preparation of the present invention comprises the steps of: (A) an inner dish container that can be accommodated in a cosmetic container and has a filling hole and an air hole at the bottom of the container; (B) a flexible rubber mold; (C) oil-based cosmetics, A manufacturing method using setting the rubber mold on the inner tray so as to seal the opening of the inner tray; a step of heating the oil-based cosmetic material, and feeding the oil-based cosmetic material through the filling hole at the bottom of the inner tray container with the opening of the inner tray container facing downward to fill an internal space formed by the inner tray container and the rubber mold; A step of cooling to solidify the oil-based cosmetic; removing the rubber mold; Equipped with The rubber mold has a surface that comes into contact with the oil-based cosmetic material and is blasted, and is set so that the contact surface faces the internal space.

[0009] In addition, in the method for producing an oily solid cosmetic product of the present invention, it is preferable that the rubber mold has an uneven portion on its surface that comes into contact with the oily solid cosmetic product, which is used to provide an engraving for decorating the oily solid cosmetic product, and that the rubber mold is set by being fitted onto the outer periphery of the periphery of the opening of the inner dish container.

[0010] In addition, in the method for producing an oily solid cosmetic product of the present invention, it is preferable that the filling hole is located in the center of the inner tray container, the upper limit of the particle size of the abrasive used in the blasting process is a particle size in which, when the abrasive is sieved in the order of a 425 μm mesh sieve, a 300 μm mesh sieve, and a 212 μm mesh sieve, the total amount of the abrasive that passed through the 425 μm mesh sieve and remained on the 300 μm mesh sieve and the 212 μm mesh sieve exceeds 50 mass% when the amount of the abrasive that passed through the 425 μm mesh sieve is taken as 100 mass%, the lower limit of the particle size of the abrasive is a particle size in which, when the abrasive is sieved through a sieve having a mesh size of 150 μm, a sieve having a mesh size of 106 μm, and a sieve having a mesh size of 63 μm in that order, the total amount of the abrasive that passes through the 150 μm sieve and remains on the 106 μm sieve and the 63 μm sieve exceeds 50 mass % when the amount of the abrasive that passes through the 150 μm sieve is taken as 100 mass %, The size of the filling hole is 3 mm to 15 mm, The number of the air holes is 1 to 8. It is preferable that the diameter of the air hole is 0.5 mm to 4 mm.

[0011] Furthermore, in the method for producing an oily solid cosmetic preparation of the present invention, it is preferable that the complex viscosity of the oily cosmetic preparation at a temperature of 80 to 100° C. is 10,000 mPa·s or less. Effect of the Invention

[0012] According to the present invention, a method for producing an oily solid cosmetic preparation having improved effects of preventing uneven coloring on the surface and the occurrence of cavities, air bubbles, pinholes, and the like can be provided. [Brief description of the drawings]

[0013] [Figure 1] (A) A diagram showing a container with a filling hole and an air hole, and (B) a silicone rubber mold that has been blasted. [Diagram 2](B) A diagram showing the blasted silicone rubber mold attached to the inner dish container (A) equipped with a filling hole and an air hole. [Diagram 3] FIG. 13 shows (A) an inner dish container equipped with a filling hole and an air hole, from which a previously prepared (C) oil-based cosmetic composition is poured. [Figure 4] FIG. 13 shows that (A) an inner plate container equipped with a filling hole and an air hole has had (C) the oil-based cosmetic material overflowing from the filling hole and air hole portion removed with a spatula. [Diagram 5] (B) is a diagram showing the completion of the oil-based solid cosmetic product after removing the inner dish container (A) equipped with a filling hole and an air hole from the blasted silicone rubber mold. [Figure 6] 1 is a photograph showing the surface of the oily solid cosmetic preparation of Example 1. [Figure 7] 1 is a photograph showing the surface of the oily solid cosmetic product of Comparative Example 1 in which color unevenness occurred. [Figure 8] 1 is a photograph showing the surface of the oily solid cosmetic preparation of Example 12. [Figure 9] 1 is a photograph showing the surface of the oily solid cosmetic preparation of Comparative Example 9 which had poor releasability and peeled off. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] The method for producing an oily solid cosmetic product of the present invention will be specifically described below, but the present invention is not limited to the embodiments described in this specification. The method for producing an oily solid cosmetic product of the present invention is a novel technology for filling an oily solid cosmetic product, (A) an inner dish container that can be accommodated in a cosmetic container and has a filling hole and an air hole at the bottom of the container; (B) a flexible rubber mold; (C) oil-based cosmetics, A manufacturing method using setting the rubber mold on the inner tray so as to seal the opening of the inner tray; a step of heating the oil-based cosmetic material, and feeding the oil-based cosmetic material through the filling hole at the bottom of the inner tray container with the opening of the inner tray container facing downward to fill an internal space formed by the inner tray container and the rubber mold; A step of cooling to solidify the oil-based cosmetic; removing the rubber mold; The rubber mold is characterized in that the contact surface with the oil-based cosmetic is blasted and the contact surface is set facing the internal space. This makes it possible to provide a method for producing an oil-based solid cosmetic with improved prevention of surface color unevenness, cavities, air bubbles, pinholes, etc. Furthermore, in the method for producing an oil-based solid cosmetic of the present invention, the rubber mold can have an uneven portion on the contact surface for providing an engraving for decorating the oil-based solid cosmetic, and the rubber mold is preferably set by being fitted to the outer periphery of the periphery of the opening of the container. By blasting the contact surface of the rubber mold, it is possible to improve the prevention of color unevenness and the mold releasability. Furthermore, by providing an air hole (a hole for air or (C) oil-based cosmetic protruding from the hole) in the (A) inner plate container, it is possible to improve the prevention of cavities, air bubbles, pinholes, etc. Furthermore, when filling the (C) oil-based cosmetic, air and a small amount of the (C) oil-based cosmetic escape through the air hole, allowing the (A) inner dish container to be filled sufficiently with the (C) oil-based cosmetic. Therefore, even if the (B) rubber mold has a shape corresponding to the uneven portion for engraving, a clear unevenness can be created.

[0015] In the present invention, the material of the (A) inner plate container is not particularly limited as long as the effects of the present invention can be obtained, but metal or resin containers can be used, and when used for foundation, a metal or resin dish-shaped container for foundation can be used. The shape of the (A) inner plate container may be circular or polygonal, such as a square or rectangular shape, when viewed from above, and in the case of a polygonal shape such as a square shape, the corners may be rounded. The size of the (A) inner plate container is also not particularly limited, and a size of a metal or resin plate generally used for cosmetics can be used. Furthermore, the (A) inner plate container can be attached and stored in an outer container such as a compact container by a known method.

[0016] Furthermore, in the present invention, the filling hole of the (A) container is not limited as long as the (C) oil-based cosmetic can be filled into the (A) container, but since the (C) oil-based cosmetic is liquid when filled, the filling hole of the (A) container has a hole diameter of 3 mm to 15 mm, preferably 4 mm to 10 mm, and more preferably 5 mm to 7 mm. If the hole diameter is smaller than 3 mm, the flow rate will increase and the product will be filled while entraining air, resulting in a filled product with voids, or the voids will cause poor releasability, and if the hole diameter is larger than 15 mm, the (C) oil-based cosmetic will be discharged from the filling hole, making it impossible to retain the (C) oil-based cosmetic in the (A) container, or cracks will occur due to the voids, affecting the releasability. In addition, the shape of the filling hole of the (A) container can be a circle, a square, or the like, depending on the shape of the nozzle, but is not particularly limited, and is preferably a circle. In the present invention, the "hole diameter" of a filling hole or air hole means the diameter of a circle if the hole is circular, and means the diameter of the inscribed circle of the polygon such as a triangle or a rectangle.

[0017] Furthermore, in the present invention, the number and position of the filling holes in the (A) container are not limited as long as the (C) oil-based cosmetic can be filled into the (A) container, and may be, for example, on the side of the lower part of the (A) container, but it is preferable that there is at least one filling hole in the center of the (A) container, and the filling hole may be in another position as long as it is possible to fill the container, or may have multiple filling holes. Here, the center refers to the center of the circle when the (A) container is circular, and refers to the intersection of the diagonals when the (A) container is rectangular.

[0018] Furthermore, in the present invention, the number of air holes in the (A) container is not limited as long as it can remove air and the (C) oil-based cosmetic that protrudes from the holes when the (C) oil-based cosmetic is filled into the (A) container, and may be located, for example, on the side of the lower part of the (A) container, but it is preferable that the (A) container has 1 to 8 air holes at the corners of the (A) container, and 1 to 4 air holes at the corners of the (A) container, and more preferably 4 air holes at the corners of the (A) container. If the (A) container has less than one air hole, it is not possible to remove air that is entrained during filling or air in the internal space generated when the (A) container and the (B) rubber mold are set, and if the number of air holes exceeds 8, a large amount of the (C) oil-based cosmetic is likely to leak during filling, resulting in the formation of voids or deterioration of releasability due to the voids, and the effect of the present invention cannot be obtained. Here, "corner" refers to the outer periphery of the circle if the (A) inner plate container is circular, and can be provided at any interval on the outer periphery; if it is rectangular, it refers particularly to the four corners of the outer periphery of the rectangle; if it is triangular, it refers particularly to the three corners of the outer periphery; and if it is polygonal, it can be provided on the outer periphery, particularly at the corners, depending on the number of corners.

[0019] In the present invention, the shape of the air hole in the (A) inner tray container is not limited as long as it can remove air and the (C) oil-based cosmetic that protrudes out of the hole when the (C) oil-based cosmetic is filled into the (A) inner tray container; a circle, a square, etc. can be used, and although not limited thereto, a circle is particularly preferable.

[0020] In the present invention, the diameter of the air hole in the (A) inner tray container is not limited as long as it can remove air and the (C) oil-based cosmetic that protrudes from the hole when the (C) oil-based cosmetic is filled into the (A) inner tray container, but the hole diameter is preferably 0.5 mm to 4 mm, more preferably 1 mm to 3 mm, and even more preferably 1.2 mm to 1.7 mm. If the hole diameter is smaller than 0.5 mm, air is difficult to remove, resulting in voids, which may cause an insufficient amount of the (C) oil-based cosmetic to be filled into the (A) inner tray container, or the voids may cause deterioration of the mold releasability, and if the hole diameter is larger than 4 mm, a large amount of the (C) oil-based cosmetic is discharged together with the air, making it impossible to retain the (C) oil-based cosmetic in the (A) inner tray container, and the voids may cause cracks to form, which may cause deterioration of the mold releasability, or the filling of the oil-based cosmetic into the uneven parts that become the imprints may be insufficient, or the mold release may be incomplete.

[0021] In the present invention, the flexible rubber mold (B) is not limited as long as the effects of the present invention can be obtained. For example, rubber such as silicone rubber or butylene rubber can be used, but it is particularly preferable that the mold be made of silicone rubber.

[0022] Furthermore, in the present invention, the (B) rubber mold having a blasted surface that comes into contact with the oil-based cosmetic is a rubber mold made of silicone or the like that has been blasted, and can further have a design with projections and recesses that serve as a transfer mold for decorating the surface of the oil-based solid cosmetic. The design formed by the projections and recesses is not limited to letters, symbols, etc. Furthermore, the depth (height difference) of the projections and recesses of the (B) rubber mold for decoration is preferably 0.05 mm or more, more preferably 0.2 mm or more, in order to more clearly bring out the three-dimensional effect and design of the surface, and more preferably 0.3 mm to 20 mm, in particular, when a three-dimensional effect is to be produced.

[0023] In the present invention, blasting is a surface processing method in which an innumerable particulate abrasive (abrasive grains, blasting material) is sprayed onto an object and collided with the object to roughen and grind the surface of the object, and in the method for producing an oily solid cosmetic product of the present invention, the surface of the (B) rubber mold is roughened by subjecting the surface of the metal mold used in producing the (B) rubber mold to blasting and molding. Furthermore, in the present invention, the abrasive (abrasive grains, blasting material) used in the blasting can be metal, ceramic, glass, etc.

[0024] In the present invention, the upper limit of the particle size of the abrasive is set to 50% by mass when the abrasive is sieved through a 425 μm mesh sieve, a 300 μm mesh sieve, and a 212 μm mesh sieve in that order, and the total amount of the abrasive that passed through the 425 μm mesh sieve and remained on the 300 μm mesh sieve and the 212 μm mesh sieve is taken as 100% by mass of the abrasive that passed through the 425 μm mesh sieve. It is preferable that the lower limit of the particle size of the abrasive is a particle size in which, when the abrasive is sieved through a sieve having a mesh size of 150 μm, a sieve having a mesh size of 106 μm, and a sieve having a mesh size of 63 μm in that order, the total amount of the abrasive that passed through the 150 μm sieve and remained on the 106 μm sieve and the 63 μm sieve exceeds 50 mass % when the amount of the abrasive that passed through the 150 μm sieve is taken as 100 mass %. In addition, the upper limit of the particle size of the abrasive is a particle size in which, when the abrasive is sieved through a sieve with a mesh size of 250 μm, a sieve with a mesh size of 180 μm, and a sieve with a mesh size of 125 μm in that order, the total amount of the abrasive that passes through the 250 μm sieve and remains on the 180 μm sieve and the 125 μm sieve exceeds 50% by mass when the amount of the abrasive that passes through the 250 μm sieve is taken as 100% by mass, More preferably, the lower limit of the particle size is a particle size in which the abrasive is sieved through a sieve with a mesh size of 212 μm, a sieve with a mesh size of 150 μm, and a sieve with a mesh size of 106 μm in that order, and the total amount of the abrasive that passes through the 212 μm sieve and remains on the 150 μm sieve and the 106 μm sieve exceeds 50% by mass when the amount of the abrasive that passes through the 212 μm sieve is taken as 100% by mass. Abrasives can be freely combined and selected from within the particle size range of these abrasives according to the design of the surface state after filling of the oil-based solid cosmetic. The particle size range of such abrasives is, for example, a range in which the upper limit passes through a sieve with a mesh size of 425 μm, and the lower limit passes through a sieve with a mesh size of 425 μm, and the total amount of the abrasive that remains on the 45 μm sieve exceeds 80% by mass when the amount of the abrasive that passes through the 425 μm sieve is taken as 100% by mass. If the particle size of the projection agent used is outside the above range, the mold releasability will be poor and color unevenness will occur, which may impair the appearance.

[0025] In addition, JIS R 6001-1 classifies the size of abrasives into 26 stages represented by F4 to F220, and expresses the particle size, with a smaller number indicating a coarse surface and a larger number indicating a fine surface, but if the requirements of the present invention are met, abrasives with particle sizes specified in JIS R 6001-1 can be used. Specifically, JIS R 6001-1 F60 to F150 are preferred, F70 to F120 are more preferred, and F90 to F100 are even more preferred.

[0026] In the present invention, the oil-based cosmetic (C) is not limited as long as it has a fluidity that allows it to be filled from a filling nozzle when heated at 60°C to 120°C and solidifies when cooled, and may contain water. The oil-based cosmetic includes a water-in-oil emulsion cosmetic, and is a cosmetic that has the property of being able to maintain its shape at room temperature (25°C) and melt when heated to a predetermined temperature or higher. Specifically, the complex viscosity of the oil-based cosmetic (C) at a temperature of 80 to 100°C is preferably 10,000 mPa·s or less, more preferably 7,000 mPa·s or less, and even more preferably 4,000 mPa·s or less.

[0027] Furthermore, in the present invention, the oil-based cosmetic (C) may contain solid oils, liquid oils, semi-solid oils, powders, etc. Such solid oils are not particularly limited as long as they are solid oils used in ordinary oil-based solid cosmetics, and examples thereof include solid oils and fats such as sunflower seed wax, candelilla wax, silicone wax, cacao butter, coconut oil, horse tallow, hardened coconut oil, palm oil, beef tallow, mutton tallow, hardened beef tallow, palm kernel oil, lard, beef bone fat, Japan Rice Clover kernel oil, hardened oil, beef foot fat, Japan Rice Clover, and hardened castor oil, beeswax, cotton wax, carnauba wax, bayberry wax, Japanese laurel wax, whale wax, montan wax, rice bran wax, kapok wax, lanolin acetate, lanolin, sugar cane wax, lanoline fatty acid isopropyl, hexyl laurate, reduced lanolin, hard lanolin, Examples of the solid oil include waxes such as shellac wax, POE lanolin alcohol ether, POE lanolin alcohol acetate, POE cholesterol ether, lanolin fatty acid polyethylene glycol, and POE hydrogenated lanolin alcohol ether; hydrocarbon oils such as solid paraffin and microcrystalline wax; higher fatty acids such as myristic acid, palmitic acid, stearic acid, and behenic acid; and higher alcohols such as cetyl alcohol, stearyl alcohol, behenyl alcohol, myristyl alcohol, and cetostearyl alcohol. One or more solid oils can be selected and blended as desired.The liquid oil is not particularly limited as long as it is a liquid oil used in ordinary oil-based solid cosmetics, and examples thereof include safflower oil, soybean oil, grape seed oil, sesame oil, wheat germ oil, avocado oil, olive oil, olive squalane, castor oil, macadamia nut oil, medfoam oil, sunflower oil, palm oil, almond oil, rosehip oil, apricot oil, camellia oil, evening primrose oil, etc., as well as plant-derived triglycerides such as glyceryl triisostearate and tri(capryl-caprate)glyceryl, dimer diol or dimer acid. Esters, animal oils such as mink oil, turtle oil, and liquid lanolin, hydrocarbons such as liquid paraffin, squalane, heavy liquid isoparaffin, and polybutene, fatty acid esters of lower alcohols such as isopropyl myristate, isopropyl isostearate, and isopropyl lanolin fatty acid, fatty acid esters of higher alcohols such as 2-ethylhexyl isononanoate, octyldodecyl myristate, octyldodecyl oleate, cetyl 2-ethylhexanoate, isocetyl 2-ethylhexanoate, and isostearyl isostearate, diisostearate malate, hydroxyethyl esters of higher alcohols such as glyceryl tricaprylate, glyceryl tri-2-ethylhexanoate, propylene glycol dicaprylate, propylene glycol di(capryl-caprate), propylene glycol diisostearate, neopentyl glycol di-2-ethylhexanoate, and other polyhydric alcohol fatty acid esters; higher fatty acids such as oleic acid, erucic acid, linoleic acid, and isostearic acid; higher alcohols such as oleyl alcohol and isostearyl alcohol; dimethylpolysiloxane; methylphenyl Examples of the liquid oil include linear polysiloxanes such as diphenylpolysiloxane, cyclic polysiloxanes such as octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, silicone oils such as modified polysiloxanes such as amino-modified polysiloxane, polyether-modified polysiloxane, alkyl-modified polysiloxane, fluorine-modified polysiloxane, and fluorine oils such as perfluoropolyether and perfluorocarbon. One or more types of liquid oils can be selected and blended as desired.Furthermore, the semi-solid oil is not particularly limited as long as it is a semi-solid oil used in ordinary oil-based solid cosmetics, and examples thereof include hydrogenated castor oil stearate, hydrogenated castor oil isostearate, tri(caprylic / capric / myristic / stearic acid)glyceryl, shea butter, cholesteryl hydroxystearate, cholesteryl isostearate, dihydrocholesteryl macadamiate, phytosteryl ricinoleate, phytosteryl isostearate, phytosteryl macadamiate, lanolin, octyldodecyl lanolate, hexahydroxystearic acid, Examples of semi-solid oils include dipentaerythrityl, dipentaerythrityl (hydroxystearate / stearic acid / rosin acid), dipentaerythrityl (hydroxystearate / isostearate), dipentaerythrityl rosinate, hydroxyalkyl dimer dilinoleyl ether, hydrogenated dimer acid di(phytosteryl / isostearyl / cetyl / stearyl / behenyl) ester, N-lauroyl-L-glutamic acid di(cholesteryl / behenyl / octyldodecyl), horse oil, hydrogenated vegetable oil, petrolatum, and the like. One or more types of semi-solid oils can be selected and blended as desired. Furthermore, the powder is not particularly limited as long as it is a powder used in ordinary oil-based solid cosmetics, and examples thereof include talc, kaolin, mica, synthetic mica, silica, barium sulfate, boron nitride, nylon powder, polyethylene powder, organopolysiloxane elastomer, bentonite, smectite, aluminum silicate calcium silicate, magnesium silicate, silicic anhydride, crystalline cellulose, polymethacrylate (methyl, ethyl ester), polyacrylate (methyl, ethyl ester), nylon powder, and polyvinylpyrrolidone. Examples of the powder include polymethylsilsesquioxane powder, which has a network structure in which siloxane bonds extend three-dimensionally and has an intermediate structure between inorganic and organic in which a methyl group is bonded to one silicon atom; titanium dioxide, zinc oxide, iron oxide (such as red iron oxide), ultramarine, Prussian blue, pearl pigments (such as titanium mica), aluminum powder, organic dyes such as Red No. 104, Red No. 201, Red No. 202, Red No. 226, Yellow No. 4, Orange No. 204, Blue No. 404, Blue No. 1, Green No. 3, and lakes thereof, and one or more types of powder can be selected and blended as desired.The shape of the powder may be spherical, similar to a sphere, plate-like, needle-like, etc., and both porous and non-porous particles may be used for the powder.

[0028] In the present invention, the oil-based cosmetic preparation (C) may contain, in addition to the above-mentioned components, other components that are generally used in cosmetics and pharmaceuticals, etc., within the scope of not impairing the effects of the present invention. Examples of such components include moisturizers, various polymers and resins, surfactants, film-forming agents, thickeners, ultraviolet absorbers, lower alcohols, polyhydric alcohols, colorants, water, vitamins, preservatives, antioxidants, fragrances, etc.

[0029] Furthermore, in the present invention, the oily solid cosmetic composition refers to a cosmetic that can be used on the human body, etc., and does not exclude applications such as quasi-drugs and pharmaceuticals, and includes basic cosmetics (external skin preparations), makeup cosmetics, hair cosmetics, bath additives, etc., of which makeup cosmetics are preferred, and can in particular be used as foundation, concealer, eye shadow, highlighter, shading, blush, lipstick, eyebrow, etc.

[0030] In the present invention, the oil-based cosmetic preparation (C) can be produced by a method for producing a normal cosmetic preparation.

[0031] The present invention will be described in more detail below with reference to examples, but the present invention is not limited to these examples. In addition, the numerical values ​​in the formulations below indicate mass %. EXAMPLES

[0032] (Examples 1 to 11, Comparative Examples 1 to 8) Oil-based solid cosmetic preparations of Examples 1 to 11 and Comparative Examples 1 to 8 were manufactured according to the "Manufacturing Procedure for Oil-Based Solid Cosmetics" below. The particle size (size) of the abrasive used in the blasting treatment and the sizes of the filling hole and air hole in the inner plate container were as shown in Tables 1 to 4. The obtained oil-based solid cosmetic preparations of Examples 1 to 11 and Comparative Examples 1 to 8 were subjected to the following void test, color unevenness test, and releasability test, and the results are also shown in Tables 1 to 4. The complex viscosity of the (C) oil-based cosmetic preparation used in Examples 1 to 11 and Comparative Examples 1 to 8 was 935 mPa s at 95°C.

[0033] (Manufacturing procedure for oil-based solid cosmetics) FIG. 1 is a diagram showing (A) an inner plate container having a filling hole and an air hole, and (B) a silicone rubber mold that has been subjected to a blast treatment, FIG. 2 is a diagram showing the silicone rubber mold that has been subjected to a blast treatment (B) being attached to the inner plate container that has a filling hole and an air hole (A), FIG. 3 is a diagram showing the pouring of a previously prepared (C) oil-based cosmetic through the filling hole of the inner plate container that has a filling hole and an air hole (A), FIG. 4 is a diagram showing the removal with a spatula of the (C) oil-based cosmetic that has protruded from the filling hole and air hole of the inner plate container that has a filling hole and an air hole (A), and FIG. 5 is a diagram showing the removal of the inner plate container that has a filling hole and an air hole (A) from the silicone rubber mold that has been subjected to a blast treatment (B) to complete the oil-based solid cosmetic. In the figures, 1 is the inner tray container, 11 is a filling hole, 12 is an air hole, 13 is an opening, 2 is a rubber mold, 3 is a filling nozzle, 4 is an oil-based cosmetic, 5 is the solidified oil-based cosmetic after cooling, 51 is the "solidified oil-based cosmetic" that has protruded from the inner tray container and been removed, and 6 is the oil-based solid cosmetic of the present invention. As shown in Figures 1 to 5, the surface 21 that comes into contact with the oil-based cosmetic has been subjected to a blasting treatment, and uneven parts are formed for applying an engraving as necessary. (B) A flexible silicone rubber mold 2 is provided with a filling hole 11 and an air hole 12. (A) A metal inner tray container 1 is fitted around the periphery of the opening 13 of the metal inner tray container 1 with the contact surface of the rubber mold 2 facing the internal space of the inner tray container 1 so as to seal the opening 13 of the container. The (C) oil-based cosmetic material 4 that had been previously prepared was heated and then fed into the filling hole 11. After cooling, the (C) oil-based cosmetic material 51 that had protruded from the filling hole 11 and air hole 12 of the (A) inner plate container 1 equipped with the filling hole 11 and air hole 12 was removed with a spatula, and the (A) inner plate container 1 equipped with the filling hole 11 and air hole 12 filled with the (C) oil-based cosmetic material was taken out of the (B) blasted silicone rubber mold 2, thereby producing an oil-based solid cosmetic material 6.

[0034] (Particle size condition) The particle sizes A to E and "-" in the table below correspond to the following conditions. A: When an abrasive is sieved through a 425 μm sieve, a 300 μm sieve, and a 212 μm sieve in that order, the total amount of the abrasive that passed through the 425 μm sieve and remained on the 300 μm sieve and the 212 μm sieve is more than 50% by mass when the amount that passed through the 425 μm sieve is taken as 100% by mass. In this case, the amount of the abrasive that passed through the 45 μm sieve is less than 20%. B: When an abrasive is sieved through a 250 μm sieve, a 180 μm sieve, and a 125 μm sieve in that order, the total amount of the abrasive that passed through the 250 μm sieve and remained on the 180 μm sieve and the 125 μm sieve is more than 50% by mass when the amount that passed through the 250 μm sieve is taken as 100% by mass. In this case, the amount of the abrasive that passed through the 45 μm sieve is less than 20%. C: When an abrasive is sieved through a 150 μm sieve, a 106 μm sieve, and a 63 μm sieve in that order, the total amount of the abrasive that passed through the 150 μm sieve and remained on the 106 μm sieve and the 63 μm sieve is more than 50% by mass when the amount that passed through the 150 μm sieve is taken as 100% by mass. In this case, the amount of the abrasive that passed through the 45 μm sieve is less than 20%. D: When an abrasive is sieved through a 1000 μm mesh sieve, a 710 μm mesh sieve, and a 500 μm mesh sieve in that order, the total amount of particles that passed through the 1000 μm mesh sieve and remained on the 710 μm mesh sieve and the 500 μm mesh sieve is more than 50% by mass when the amount of particles that passed through the 1000 μm mesh sieve is taken as 100% by mass. E: An abrasive is sieved through a 125 μm mesh sieve, a 90 μm mesh sieve, and a 53 μm mesh sieve in that order, and the total amount of the particles that passed through the 125 μm mesh sieve and remained on the 90 μm mesh sieve and the 53 μm mesh sieve is more than 50% by mass when the amount of the particles that passed through the 125 μm mesh sieve is taken as 100% by mass. -: No abrasives (no blasting applied to silicone rubber mold)

[0035] (Void test) Regarding the obtained oil-based solid cosmetic, (A) the inner dish container with a filling hole and an air hole filled with (C) the oil-based cosmetic was removed from (B) the blast-treated silicone rubber mold, and then the surface was thinly scraped to check for the presence or absence of voids (porosity) inside, and evaluated according to the following evaluation criteria. ◎ (Excellent): No voids. ○(Good): Almost no voids. △(Acceptable): There is some void. × (unacceptable): There is a gap.

[0036] (Color unevenness test) The inner dish container (A) filled with the oil-based cosmetic (C) and equipped with a filling hole and an air hole was removed from the blast-treated silicone rubber mold (B), and the color unevenness on the surface of the obtained oil-based solid cosmetic was visually confirmed and evaluated according to the following evaluation criteria. ◎(Excellent): No color unevenness. ○(Good): Almost no color unevenness. △(Acceptable): There is some color unevenness. × (Not acceptable): Color is uneven.

[0037] (Releasability test) The obtained oil-based solid cosmetic was visually inspected for the release property from the blast-treated silicone rubber mold (B) when removing the inner dish container (A) filled with the oil-based cosmetic (C) and equipped with a filling hole and an air hole from the blast-treated silicone rubber mold (B), as well as the surface condition of the oil-based solid cosmetic, and evaluated according to the following evaluation criteria. ◎ (Excellent): Very easy to release, and the surface of the oil-based solid cosmetic is uniform. ◯ (Good): The product was easy to release, but slight peeling was observed on the surface of the oil-based solid cosmetic preparation. △(Fair): Release was somewhat difficult, and peeling was observed on the surface of the oil-based solid cosmetic preparation. × (Unacceptable): Release was difficult, and significant peeling was observed on the surface of the oil-based solid cosmetic.

[0038] [Table 1]

[0039] [Table 2]

[0040] [Table 3]

[0041] [Table 4]

[0042] Fig. 6 is a photograph showing the surface of the oil-based solid cosmetic preparation of Example 1, and Fig. 7 is a photograph showing the surface of the oil-based solid cosmetic preparation of Comparative Example 1 in which color unevenness occurred. From the results of Figs. 6 and 7 and Tables 1 to 4, the oil-based solid cosmetic preparations of Examples 1 to 11 had good results in the void test, color unevenness test, and releasability test, and oil-based solid cosmetic preparations were produced that had improved effects in preventing the occurrence of surface color unevenness, cavities, air bubbles, pinholes, etc. On the other hand, the oil-based solid cosmetic preparations of Comparative Examples 1 to 8 had poor releasability compared to the oil-based solid cosmetic preparations of Examples 1 to 11, voids occurred in Comparative Examples 2, 3, 7, and 8, and color unevenness occurred in Comparative Examples 1, 4, 5, and 6.

[0043] Example 12 8 is a photograph showing the surface of an oil-based solid cosmetic product (Example 12) produced by replacing the blast-treated silicone rubber mold (B) with a rubber mold provided with an uneven portion for providing an imprint for decorating the oil-based solid cosmetic product in Example 1. In Example 12, there were also no voids or uneven coloring, the mold releasability was good, and the unevenness of the decorative portion was also clear.

[0044] Similarly, the surface condition of oil-based solid cosmetics produced by replacing the silicone rubber mold subjected to the blast treatment (B) in Examples 2 to 11 with a rubber mold provided with an uneven portion for providing an imprint for decorating the oil-based solid cosmetic was confirmed. Here too, the results of the void test, color unevenness test, and releasability test were good, and oil-based solid cosmetics with improved effects of preventing the occurrence of surface color unevenness, cavities, air bubbles, pinholes, etc. were produced.

[0045] Comparative Example 9 9 is a photograph showing the surface of an oil-based solid cosmetic product (Comparative Example 9) produced by replacing the silicone rubber mold not subjected to blasting (B) with a rubber mold provided with an uneven portion for providing an imprint for decorating the oil-based solid cosmetic product in Comparative Example 1. The mold releasability was poor, peeling occurred, and the unevenness of the decorative portion was unclear. [Explanation of symbols]

[0046] 1 Medium Plate Container 11 Filling hole 12 Air hole 13 Aperture 2 Rubber mold 21 Contact surface 3 Filling nozzle 4. Oil-based cosmetics 5. Solidified oil-based cosmetics 51 "Solidified oil-based cosmetic material" removed from the container 6. Oil-based solid cosmetic preparation of the present invention

Claims

1. (A) An inner dish container that can be accommodated in a cosmetic container, the inner dish container being a dish-shaped container that can be filled with cosmetics and that has a filling hole and an air hole at the bottom of the container; (B) a flexible rubber mold; (C) an oil-based cosmetic preparation, A manufacturing method using setting the rubber mold on the inner tray so as to seal the opening of the inner tray; a step of heating the oil-based cosmetic material, and feeding the oil-based cosmetic material through the filling hole at the bottom of the inner tray container with the opening of the inner tray container facing downward to fill an internal space formed by the inner tray container and the rubber mold; A step of cooling to solidify the oil-based cosmetic; removing the rubber mold; Equipped with A method for producing an oily solid cosmetic product, wherein the rubber mold has a surface that comes into contact with the oily cosmetic material and is blasted, and the rubber mold is set so that the contact surface faces the internal space.

2. 2. The method for producing an oily solid cosmetic product according to claim 1, wherein the rubber mold has an uneven portion on a surface that comes into contact with the oily solid cosmetic product, the uneven portion being used to provide an engraving for decorating the oily solid cosmetic product.

3. 2. The method for producing an oily solid cosmetic product according to claim 1, wherein the rubber mold is fitted and set on the outer periphery of the opening of the inner tray container.

4. 2. The method for producing an oily solid cosmetic product according to claim 1, wherein the filling hole is located at the center of the inner tray container.

5. the upper limit of the particle size of the abrasive used in the blasting process is a particle size in which, when the abrasive is sieved through a 425 μm mesh sieve, a 300 μm mesh sieve, and a 212 μm mesh sieve in that order, the total amount of the abrasive that passes through the 425 μm mesh sieve and remains on the 300 μm mesh sieve and the 212 μm mesh sieve exceeds 50 mass % when the amount of the abrasive that passes through the 425 μm mesh sieve is taken as 100 mass %, the lower limit of the particle size of the abrasive is a particle size in which, when the abrasive is sieved through a sieve having a mesh size of 150 μm, a sieve having a mesh size of 106 μm, and a sieve having a mesh size of 63 μm in that order, the total amount of the abrasive that passes through the 150 μm sieve and remains on the 106 μm sieve and the 63 μm sieve exceeds 50 mass % when the amount of the abrasive that passes through the 150 μm sieve is taken as 100 mass %, The size of the filling hole is 3 mm to 15 mm, The number of the air holes is 1 to 8. A method for producing the oily solid cosmetic preparation according to claim 1.

6. The method for producing an oily solid cosmetic preparation according to claim 5, wherein the air hole has a hole diameter of 0.5 mm to 4 mm.

7. The method for producing an oil-based solid cosmetic according to any one of claims 5 and 6, wherein the complex viscosity of the oil-based cosmetic at a temperature of 80 to 100°C is 10,000 mPa·s or less.

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