Manufacturing method of solid cosmetics

Abstract

To provide a production method capable of efficiently molding a solid cosmetic having a desired shape or dimension, and high shape-holding property.SOLUTION: A production method has a process of discharging fluid of a cosmetic composition L from a nozzle 21 in a non-heated state, and molding a solid cosmetic onto a subject. The cosmetic composition L contains volatile solvent, non-volatile solvent, binder and cosmetic powder. The cosmetic composition L has a viscosity of 0.1 Pa s or more and 2000 Pa s or less at 25°C. The nozzle 21 has a maximum length D1 of 0.01 mm or more and 5 mm or less at a cross section orthogonal to a flow direction of the cosmetic composition L. The penetration hardness at 25°C of the solidified cosmetic composition after being discharged is 10 g or more and 10000 g or less.SELECTED DRAWING: Figure 1

Description

[Technical Field]

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

[0002] Solid cosmetics such as eye shadow and foundation are generally produced as shaped objects by filling a fluid containing cosmetic ingredients into a container having a predetermined shape, or by discharging the fluid onto a separate, pre-formed solid cosmetic.

[0003] As an example of a method for producing such cosmetics, a casting method for producing cosmetic products is disclosed in Patent Document 1. The method described in this document involves fluidizing an oil-containing composition by heating, injecting the fluidized composition from a nozzle onto a support, and then cooling the injected composition to obtain a solid composition. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Special Publication No. 2017-518983 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the method described in Patent Document 1, a composition fluidized by heating is injected and then cooled and solidified, resulting in a large amount of energy consumption in the heating and cooling steps. Furthermore, raw materials that are sensitive to heat require temperature adjustment during the mixing step. Furthermore, the fluid composition flows out of the injected area between the time of injection and the time of solidification, making it difficult to form a cosmetic product with the desired shape and dimensions and high shape retention.

[0006] Therefore, the present invention relates to a production method that can efficiently form a solid cosmetic material having a desired shape and dimensions and high shape retention. [Means for solving the problem]

[0007] The present invention provides a method for producing a solid cosmetic preparation, comprising the steps of: The method includes a step of discharging a fluid cosmetic composition from a nozzle in an unheated state to form a solid cosmetic on an object, The cosmetic composition comprises (A) a volatile solvent, (B) a non-volatile solvent, (C) a binder, and (D) a cosmetic powder; the cosmetic composition has a viscosity at 25°C of 0.1 Pa·s or more and 2000 Pa·s or less; the nozzle has a cross section perpendicular to the flow direction of the cosmetic composition, the cross section having a maximum length of 0.01 mm or more and 5 mm or less; The present invention relates to a method for producing a solid cosmetic product, in which the cosmetic composition after being discharged and solidified has a penetration hardness at 25°C of 10 g or more and 10,000 g or less. [Effects of the Invention]

[0008] According to the present invention, it is possible to efficiently form a solid cosmetic material having a desired shape and dimensions and high shape retention. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a perspective view schematically showing one embodiment of a manufacturing apparatus used in the manufacturing method of the present invention. [Figure 2] 2(a) to 2(c) are cross-sectional views that schematically show one embodiment of the step of forming a deposit in the manufacturing method of the present invention. [Figure 3] 3(a) and 3(b) are cross-sectional views schematically illustrating another embodiment of the step of forming a deposit in the manufacturing method of the present invention. [Figure 4] 4(a) and 4(b) are cross-sectional views schematically illustrating still another embodiment of the step of forming a deposit in the manufacturing method of the present invention. [Figure 5] FIG. 5 is a photograph showing the appearance of the cosmetics produced in the examples and comparative examples. DETAILED DESCRIPTION OF THE INVENTION

[0010] The present invention will be described below based on preferred embodiments thereof. The cosmetic material produced by this production method can be applied to the human body by directly applying it to the skin, or by dissolving or dispersing it in a solvent such as water and applying, spraying, or dripping the liquid onto the skin. The cosmetic material is solid at 1 atmosphere and 20°C. Examples of such cosmetics include, but are not limited to, makeup cosmetics, soaps, bath additives, and the like. Examples of makeup cosmetics include eye shadow, foundation, and lipstick. Cosmetics typically include cosmetic powders.

[0011] This manufacturing method is suitable for use in decorating an object by supplying a cosmetic composition having fluidity (hereinafter also referred to simply as "composition") onto the object, then solidifying the composition, and forming a deposit of solid cosmetic material derived from the composition on the object.

[0012] In the present invention, a cosmetic composition having fluidity is a liquid fluid, and excludes a purely solid or purely gaseous form. Examples of such cosmetic compositions include dispersions (so-called slurries) that are mixtures containing cosmetic powders and liquid dispersion media such as volatile solvents and non-volatile solvents. Details of the cosmetic composition and its constituent materials will be described later.

[0013] The object to which the cosmetic composition is supplied is not particularly limited, and examples thereof include paper, film, nonwoven fabric, metal, resin, and cosmetic containers made of these, as well as already-manufactured cosmetics having the same or different composition as the composition, etc. Examples of such cosmetics include molded products for powder cosmetics.

[0014] An example of a manufacturing apparatus suitable for use in the manufacturing method of the present invention is shown in Figure 1. The manufacturing apparatus 10 shown in the figure typically includes a supply unit 20 that supplies a flowable composition onto an object 70 to which the composition is to be supplied (hereinafter also simply referred to as "object"), and a nozzle 21 that is integrally arranged so as to communicate with the supply unit 20. The composition L is discharged from the nozzle 21 in an unheated state. The manufacturing apparatus 10 used in the present invention typically has a flat object placement section 90 arranged below the nozzle 21 and opposite the nozzle 21, and the object 70 can be placed or fixed on the upper surface of the object placement section 90. The details of the embodiment having these structures are shown in FIGS. 2(a) to 2(c).

[0015] As shown in FIG. 1, the manufacturing apparatus 10 used in the present invention preferably includes a position adjustment unit 50 that supports or holds the supply unit 20 and the target object placement unit 90 at predetermined positions. The position adjustment unit 50 preferably includes a position adjustment mechanism that moves the position of the nozzle 21 and the position of the object placement unit 90 relatively in any direction. This allows for modeling to be performed by moving at least one of the nozzle 21 and the object placement unit 90 in a planar direction, a vertical direction, or a combination thereof, thereby moving at least one of the nozzle 21 and the object 70 on the object placement unit 90 relatively to the other. The position adjustment mechanism may be manual, or may be automatically controlled in response to an electrical signal sent from a controller or the like.

[0016] The supply unit 20 is a member that delivers the fluid composition L to the target object 70. The supply unit 20 preferably includes a liquid delivery unit 25 and a composition storage unit . It is preferable that the liquid delivery section 25 is connected in communication with the composition storage section 26 via a tube 28. This allows the composition L supplied from the composition storage section 26 to the inside of the liquid delivery section 25 to be supplied to the nozzle 21 side continuously or discontinuously, or the supply can be stopped. As such a liquid delivery section 25, a jet dispenser capable of discharging the composition L in the form of droplets, or a mono dispenser or screw dispenser capable of continuously discharging the composition L can be used. It is preferable that one side of the composition storage section 26 is connected to a pressurizing means such as air or a pump, and that the composition L stored in the composition storage section 26 can be pressure-fed to the liquid delivery section 25 side via the tube 28.

[0017] The nozzle 21 is typically a tubular member that supplies the composition L from the supply unit 20 toward the target object 70. The nozzle 21 has a flow path for the composition L, which is a space formed inside the nozzle 21, formed along the flow direction R of the composition L. One end of the nozzle 21, which is the nozzle tip, constitutes a supply port for the composition L, and the other end is connected and communicates with the supply unit 20 described above. The material of which the nozzle is made is not particularly limited, and for example, metal or plastic can be used.

[0018] The nozzle 21 has a maximum length D1 (see Figure 2(a)) of the flow path in a cross section perpendicular to the flow direction R of the nozzle 21 of the composition L, which is expressed as the maximum length of the internal space, from the viewpoints of preventing nozzle clogging, stabilizing continuous discharge, and reducing pressure loss, and is preferably 0.01 mm or more, more preferably 0.1 mm or more, and even more preferably 0.2 mm or more. Moreover, the above-mentioned maximum length D1 is preferably 5 mm or less, more preferably 3 mm or less, and even more preferably 2 mm or less, from the viewpoint of enabling fine application and suppressing dripping. The maximum length D1 of the flow path of the nozzle 21 described above is synonymous with the inner diameter of the nozzle 21 when the nozzle 21 is circular.

[0019] The nozzle 21 has a cross-sectional area of ​​0.00008 mm2 or more in a cross section perpendicular to the flow direction R of the composition L through the nozzle 21, from the viewpoints of suppressing nozzle clogging, stabilizing continuous discharge, and reducing pressure loss. 2 More than 0.008mm, preferably 0.008mm 2 More preferably, 0.032 mm 2That's all. The cross-sectional area of ​​the nozzle 21 is preferably 19.5 mm from the viewpoint of enabling fine application and suppressing dripping. 2 Less than or equal to 7.5mm, preferably 2 Less than 3.1 mm, more preferably 2 The following is the result.

[0020] 2(a) to 2(c), the production apparatus 10 is preferably provided with a temperature control member 80 for adjusting the temperature of the composition L. The temperature control member 80 may be provided in at least a part of the flow path leading to the supply of the composition L to the target object 70. The temperature control member 80 may be disposed in the manufacturing apparatus 10 at, for example, the outer surface of at least one of the supply unit 20, the nozzle 21, the liquid delivery unit 25, the composition storage unit 26, and the tube 28.

[0021] As shown in Figures 2(a) to 2(c), the manufacturing method of the present invention includes a step of supplying a composition L having a predetermined viscosity from a nozzle 21 to an object 70 and forming a deposit derived from the composition on the object. In this case, the composition L is ejected from the nozzle 21 in an unheated state. As used herein, the term "unheated state" excludes intentional heating of the composition L. Therefore, even when the temperature of the composition L inevitably rises as the composition L is ejected, this falls under the category of "unheated state." The advantage of ejecting the composition L in an unheated state is that it allows for the simple and efficient formation of a solid cosmetic product having the desired shape and dimensions and high shape retention. Furthermore, ejecting the composition L in an unheated state reduces energy consumption. Furthermore, it becomes possible to use heat-sensitive raw materials. In the present invention, it is generally preferable to eject the composition L in a temperature range of 10°C to 30°C, including room temperature (25°C).

[0022] In the modeling process, it is preferable to supply a fluid composition L from a nozzle 21 to an object 70 while moving the nozzle 21 relative to the object 70 to form a deposit derived from the composition on the object.

[0023] In the manufacturing method of the present invention, the composition L may be supplied to the object 70 discontinuously in the form of droplets, or may be supplied continuously in a linear form in the form of a straight line, a curved line, or a combination thereof. In the following explanation, an example will be given in which a cosmetic slurry containing (A) a volatile solvent, (B) a non-volatile solvent, (C) a binder, and (D) a solid cosmetic powder is used as composition L, and the slurry is continuously supplied in a linear form to form a linear deposit.

[0024] As a typical example, prior to the modeling process, the object 70 is placed on the object placement unit 90, and in this state, the nozzle 21 and the object 70 are moved relatively to each other so that the nozzle 21 faces a predetermined position above the object 70. This position of the nozzle 21 is the position from which the supply of the composition L to the object 70 starts. At this time, it is preferable that there is a gap between the tip of the nozzle 21 and the object 70, and that they are not in contact with each other. Relative movement between the nozzle 21 and the object 70 can be performed by a position adjustment mechanism in the position adjustment unit 50. An example of this is shown in Fig. 2(a).

[0025] Subsequently, while supplying the composition L from the nozzle 21 toward the object 70, at least one of the nozzle 21 and the object 70 is moved relative to the other to form a deposit S derived from the composition on the object 70 (forming step). At this time, the supply of the composition L from the nozzle 21 continues. The relative movement direction of the nozzle 21 can be a planar direction, a vertical direction, or a combination of these directions, depending on the planar shape or three-dimensional shape of the target deposit S, or the design to be depicted. In this specification, design means, for example, Japanese characters such as hiragana and katakana, the alphabet, Arabic numerals, Roman numerals, various characters such as foreign characters, straight lines and curves, and figures and geometric shapes consisting of combinations of these, symbols, colors, patterns, or shapes combining these. These designs are displayed in a color that is the same as or different from the background color of the object 70 on which the design is to be placed, an example of which is shown in Figure 2(b).

[0026] The composition L used in the modeling step is preferably a fluid that has flowability and a predetermined viscosity at least when supplied to the object 70. The viscosity of composition L at 25°C is preferably 0.1 Pa s or more, more preferably 1 Pa s or more, and even more preferably 10 Pa s or more, from the viewpoints of improving the uniform dispersion of the materials contained in the composition, stabilizing the quality, and suppressing the collapse of the deposit discharged from the nozzle and stabilizing the shape. Furthermore, from the viewpoint of improving the feedability and dischargeability from the nozzle and improving the moldability, the viscosity of composition L at 25°C is preferably 2000 Pa·s or less, more preferably 1200 Pa·s or less, and even more preferably 500 Pa·s or less. The viscosity of Composition L at 25°C is a value measured using a Brookfield viscometer (digital viscometer TVB-10R, manufactured by Toki Sangyo Co., Ltd.) The measurement conditions in this case are as follows: rotor No. M1, M2, M3, M4, H1, H2, H3, H4, H5, H6, H7, TA, TB, TC, TD, or TE is selected to match the viscosity range of the sample; the rotation speed is 3 to 100 rpm; and the measurement time is 60 seconds. The viscosity of composition L can be adjusted to fall within the above range by, for example, changing the blending ratio of the liquid and powder in the composition or by changing the type of liquid.

[0027] In the molding process, it is preferable to supply the composition L onto the object 70 while maintaining a predetermined relationship between the maximum length D1 of the cross section of the nozzle 21 and the distance H1 between the tip of the nozzle 21 and the object 70 (distance H1 / maximum length D1). In detail, the ratio (H1 / D1) of the distance H1 to the maximum length D1 in the modeling process is preferably 0.3 or more, more preferably 0.5 or more, and even more preferably 0.7 or more, from the viewpoint of preventing the ejected deposit from being crushed by the nozzle or the line width from becoming too thick. In addition, the ratio (H1 / D1) of the distance H1 to the maximum length D1 in the modeling process is preferably less than 3, more preferably 2.5 or less, and even more preferably 2 or less, from the viewpoint of improving the ability of the ejected deposit to follow the relative movement between the nozzle and the object. The above-mentioned H1 / D1 may be maintained constant from the start to the end of the modeling process, or may vary within the above-mentioned range.

[0028] The maximum length D1 of the cross section of the nozzle 21 in the modeling process can be within the above-mentioned range. The distance H1 between the tip of the nozzle 21 and the object 70 in the modeling process is preferably 0.003 mm or more, more preferably 0.2 mm or more, and even more preferably 0.25 mm or more, from the viewpoint of preventing contact between the nozzle and the object. Furthermore, the above-mentioned distance H1 is preferably 5 mm or less, more preferably 2.5 mm or less, and even more preferably 2 mm or less, from the viewpoint of improving the ability of the discharged deposit to follow the relative movement between the nozzle and the object. The distance H1 can be adjusted as appropriate by the position adjustment unit 50 described above, for example.

[0029] The amount of composition L supplied in the molding step is preferably 0.05 mm from the viewpoint of improving production capacity. 3 / s or more, preferably 0.1 mm 3 / s or more, more preferably 0.4 mm 3 / s or more. The amount of composition L supplied in the modeling step is not particularly limited as long as it is operable, but from the viewpoint of achieving stable formation of a highly precise deposit by balancing with the relative movement speed of the nozzle, it is preferably 150 mm 3 / s or less, preferably 50 mm 3 / s or less, more preferably 15 mm 3 / s or less. When the above-mentioned dispenser is used as the liquid delivery section 25 in the supply section 20, the supply amount can be appropriately changed by appropriately adjusting the rotation speed of the rotor, or by adjusting the shape and inner diameter of the nozzle 21, the viscosity of the composition L, etc.

[0030] Finally, the supply of the composition L from the nozzle 21 is stopped. Through the above steps, a deposit S having a predetermined shape is formed on the object 70. As a result, for example, the deposit S formed using the cosmetic slurry can be made into a three-dimensional object consisting of linear bodies containing the cosmetic derived from the composition. If necessary, the nozzle 21 may be moved relative to the object 70 on the same plane, or moved away from the object 70. An example of this is shown in FIG. 2(c).

[0031] From the viewpoint of enhancing the shape retention of the deposit S, improving the impact resistance during distribution and use, and enhancing the usability of the product, a step of solidifying the deposit S (solidification step) can be carried out after the shaping step. A preferred example of the solidification step is a method of drying under non-heating conditions. Examples of methods for drying under non-heating conditions include natural drying or vacuum removal at room temperature, or liquid removal methods such as vacuum freeze drying, etc. In this way, the liquid derived from the slurry is removed or solidified from the composition L to form a solidified deposit S.

[0032] The deposit S formed by solidifying the composition after discharge has a hardness, expressed as a penetration hardness at 25°C, of ​​10 g or more, preferably 30 g or more, and more preferably 150 g or more, from the viewpoint of ensuring sufficient shape retention. Furthermore, in order to ensure sufficient "removal" as a cosmetic, the deposit S after the solidification step has a penetration hardness at 25°C of 10,000 g or less, preferably 7,000 g or less, and even more preferably 3,500 g or less. In this specification, the penetration hardness is a value measured using a rheometer (Sun Scientific Co., Ltd.) Specifically, composition L for producing deposit S is leveled and filled into a metal dish having a length of 26.5 mm, a width of 26.5 mm, and a height of 3.5 mm under the same conditions as those for producing deposit S, and after all the volatile solvent has dried, the penetration hardness is measured at 25°C using a 2 mm diameter jig.

[0033] The deposit S shaped in this manner may be used as the desired cosmetic product as is, or may be further processed to produce the desired cosmetic product. In either case, according to the manufacturing method of the present invention, even when a composition that is fluid at room temperature is used, a mold or the like is not required, and the formulation of the composition itself can improve shape retention while allowing the desired design to be depicted with high precision and high definition, making it possible to simply and efficiently perform shaping and decoration with good shape and dimensional precision.

[0034] The thickness (length along the vertical direction) T1 of the deposit S produced by the above-mentioned method is preferably 0.05 mm or more, more preferably 0.1 mm or more, and even more preferably 0.15 mm or more, from the viewpoint of forming a three-dimensional design. Furthermore, the thickness T1 of the deposit S is not particularly limited, but is preferably 1 mm or less, more preferably 0.5 mm or less, and even more preferably 0.3 mm or less, from the viewpoint of suppressing collapse of the deposit when one layer of the deposit is formed. When the deposit is a single layer, the thickness T1 indicates the thickness of the single layer, and when a plurality of deposits are stacked, the thickness T1 indicates the total thickness of the plurality of stacked deposits. The thickness T1 of the deposit S can be changed as appropriate, for example, by setting the distance H1 between the tip of the nozzle 21 and the target object 70 within the range described above, or by adjusting the shape and inner diameter of the nozzle 21, the supply amount, composition, viscosity, etc. of the composition L.

[0035] In the manufacturing method of the present invention, the above-described shaping step may be performed only once, depending on the design to be imparted to the desired cosmetic product. Alternatively, the above-described shaping step may be performed multiple times to form multiple deposits S on the same plane or to stack them to form a three-dimensional shape. In other words, after performing the first shaping step to form the first deposit, the shaping step including the second shaping step may be performed one or more times to form one or more deposits other than the first deposit. In this case, the other deposits may be formed separately and independently on the target object 70, may be formed so as to be stacked on the first deposit S1, or may be formed as a combination of these.

[0036] Specifically, as an example of stacking another deposit on a first deposit, a first modeling step is performed to form a first deposit S1 on the target object 70. Thereafter, with the supply of the composition L from the nozzle 21 stopped, the nozzle 21 is moved relatively to the target object 70 on the same plane (moving step). By performing the moving step, the position of the nozzle 21 is repositioned to the start position of supply of the composition L to the target object 70. An example of this embodiment is shown in FIG. 3(a). Then, the supply of the composition L from the nozzle 21 is resumed and the second modeling step is further performed to form a second deposit S2 as a deposit S other than the first deposit S1 on the target object 70. An example of this embodiment is shown in FIG. 3(b).

[0037] As an example of forming a deposit other than the first deposit separately and independently, a first modeling step is performed to form the first deposit S1 on the target object 70. Then, a moving step is performed. An example of this embodiment is shown in FIG. 4(a). Then, the supply of the composition L from the nozzle 21 is resumed and the second modeling step is further carried out to form a second deposit S2 on the first deposit S1 as a deposit S other than the first deposit S1. An example of this embodiment is shown in FIG. 4(b).

[0038] In any of the above-described embodiments, the molding process and the moving process can be repeated in this order to form one or more deposits other than the deposit S already formed on at least one of the target object 70 and the first deposit S1. The compositions L used to form the deposits S may be the same or different. After the formation of each deposit S, a step of solidifying each deposit S may be carried out as necessary. The solidification step may be carried out multiple times each time a deposit S is formed, or may be carried out after all of the desired deposits S have been formed.

[0039] By the above-described manufacturing method, a cosmetic containing the deposit can be obtained. For example, if the object 70 is a cosmetic, such as a powder cosmetic mold (solid powder cosmetic), the deposit can be formed directly on the cosmetic, making the design of the deposit visible and resulting in a cosmetic with high designability. A wide variety of designs can be easily created and molded. Furthermore, the formed deposit is three-dimensional, has excellent shape retention, and is highly precise, so the visible design also has good designability. If necessary, a separately formed deposit can be layered on the cosmetic for decoration, or a packaging process can be carried out in which the cosmetic is placed in a packaging bag or box, etc., before distribution to the market. Alternatively, a first deposit filled in a container and shaped according to the method of the present invention may be used as the object 70, and a second deposit made of a decorated body shaped according to the method of the present invention may be provided on the first deposit. In this case, the composition for shaping the first deposit and the composition for shaping the second deposit may be the same or different in composition.

[0040] One embodiment of the cosmetic comprising a deposit includes a three-dimensionally shaped body containing the cosmetic as the deposit. The three-dimensionally shaped body is, for example, a porous body having open or closed pores. This configuration provides a pleasant feel when in contact with the skin and also a pleasant peeling sensation. To make the resulting deposit porous, for example, the cooling temperature and stirring speed of the composition may be adjusted to control the size of the ice crystals. Whether or not the obtained deposit is porous can be determined, for example, by observing it with a microscope and checking whether or not pores of about 10 to 100 μm are formed. Furthermore, since the three-dimensional shaped body is a deposit, it is preferable that the solid content of the powder be as described above.

[0041] The following describes matters applicable to the above-mentioned production method. Unless otherwise specified, the states (three states) of substances described below are based on 1 atmosphere and 25°C.

[0042] The cosmetic composition L of the present invention contains (A) a volatile solvent, (B) a non-volatile solvent, (C) a binder, and (D) a cosmetic powder. (D) The cosmetic powder preferably includes, for example, powders used in ordinary cosmetic ingredients, such as color pigments and extender pigments. Examples of color pigments and extender pigments include inorganic powders, organic powders, and composite powders of inorganic and organic powders. Examples of inorganic powders include silicic acid, silicic acid anhydride, magnesium silicate, talc, sericite, mica, kaolin, red iron oxide, clay, bentonite, mica, titanium-coated mica, bismuth oxychloride, zirconium oxide, magnesium oxide, titanium oxide, zinc oxide, aluminum oxide, calcium sulfate, barium sulfate, magnesium sulfate, calcium carbonate, magnesium carbonate, iron oxide, ultramarine, chromium oxide, chromium hydroxide, calamine, carbon black, boron nitride, and complexes thereof. Examples of organic powders include polyamide, nylon, polyester, polypropylene, polystyrene, polyurethane, vinyl resin, urea resin, phenolic resin, fluororesin, silicone resin, acrylic resin, melamine resin, epoxy resin, polycarbonate resin, divinylbenzene-styrene copolymer, silk powder, cellulose, long-chain alkyl phosphate metal salt, N-mono long-chain alkyl acyl basic amino acid, and complexes of these. These extender pigments or color pigments may be colored or non-colored (e.g., white or essentially transparent) and may provide one or more of the following effects to the composition or to the skin: color, light diffraction, oil absorption, translucency, opacity, gloss, matte appearance, smooth feel, etc.

[0043] The content of the cosmetic powder in the cosmetic composition is preferably 5% by mass or more, more preferably 10% by mass or more, and even more preferably 20% by mass or more, from the viewpoints of maintaining shape and preventing collapse during the process of forming a deposit. Furthermore, from the viewpoints of the viscosity, ejection property, and drainage property of the cosmetic composition having fluidity, and the hardness, impact resistance, and feel (removal) of the solid cosmetic, the content of powder in the cosmetic composition is preferably 80% by mass or less, more preferably 75% by mass or less, and even more preferably 70% by mass or less. By ensuring that the content is in this range, it becomes easier to produce a cosmetic having a highly precise three-dimensional shape, and it is also possible to improve the pleasant feeling when using the product. The average particle size of the powder in the composition is preferably 0.1 μm or more, more preferably 1 μm or more, from the viewpoint of facilitating adjustment of optical properties such as coloring power, brightness, and saturation. The average particle size of the powder in the composition is preferably 300 μm or less, more preferably 150 μm or less, and even more preferably 100 μm or less, from the viewpoint of suppressing nozzle clogging and enabling continuous, stable ejection. The average particle size is the volume cumulative particle size D50 at 50% by volume of the cumulative volume measured using a laser diffraction / scattering particle size distribution analyzer.

[0044] The volatile solvent (A) used in the present invention is used for the purpose of uniformly mixing the components of the cosmetic composition, and is evaporated and removed from the composition after it is discharged from the nozzle. For this purpose, the volatile solvent is preferably water or an organic solvent. The organic solvent preferably has a flash point of 10°C to 87°C at 25°C. The volatile solvent to be used may be appropriately selected depending on the types of components that make up the composition.

[0045] When a water-soluble organic solvent is used as the volatile solvent, examples thereof include lower monohydric alcohols, such as ethanol, propanol, isopropyl alcohol, and butanol.

[0046] When an oily solvent is used as the volatile solvent, examples thereof include volatile silicone oils and volatile hydrocarbon oils. Examples of volatile silicone oils include linear dimethylpolysiloxanes such as dimethylpolysiloxane (1cs), dimethylpolysiloxane (1.5cs), and dimethylpolysiloxane (2cs); branched siloxanes such as methyltrimethicone, tris(trimethylsilyl)methylsilane, and tetrakis(trimethylsilyl)silane; and cyclic dimethylsiloxanes such as octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, and dodecamethylcyclohexasiloxane. Examples of volatile hydrocarbon oils include isoparaffin hydrocarbon oils such as isodecane, isododecane, and hydrogenated polyisobutene, and cyclic paraffin hydrocarbon oils such as cyclodecane and cyclododecane. Of these, hydrocarbon oils having 8 to 16 carbon atoms are preferred, hydrocarbon oils having 10 to 16 carbon atoms are more preferred, and hydrocarbon oils having 12 carbon atoms are even more preferred. These volatile solvents can be used alone or in combination of two or more.

[0047] The content of the volatile solvent in the cosmetic composition is preferably 15% by mass or more, more preferably 20% by mass or more, and even more preferably 25% by mass or more. The content of the volatile solvent in the composition is preferably 70% by mass or less, more preferably 60% by mass or less, and even more preferably 50% by mass or less. Within such a range, the uniform dispersion of the constituent materials of composition L can be improved, and the handling properties can also be improved.

[0048] The non-volatile solvent (B) used in the present invention is used for the purpose of adjusting the hardness of the composition after it has solidified after being ejected from the nozzle. For this purpose, it is preferable that the non-volatile solvent has a flash point of 88°C or higher. As the non-volatile solvent, water-soluble organic solvents and oil-based solvents can be used. The type of non-volatile solvent to be used can be appropriately selected depending on the type of solid cosmetic preparation.

[0049] When a water-soluble organic solvent is used as the non-volatile solvent, examples thereof include monohydric alcohols and polyhydric alcohols such as dihydric and trihydric alcohols. The monohydric alcohols include phenoxyethanol. Examples of dihydric alcohols include ethylene glycol, propylene glycol, propanediol, 1,3-butylene glycol, 1,3-propanediol, dipropylene glycol, 1,2-pentylene glycol, 1,3-pentylene glycol, 1,4-pentylene glycol, 1,5-pentylene glycol, and hexylene glycol. Examples of trihydric alcohols include glycerin, diglycerin, polyglycerin, and trimethylolpropane.

[0050] When an oily solvent is used as the non-volatile solvent, the oily solvent is preferably a liquid or paste at 25° C., and any oily solvent commonly used in cosmetics may be used, such as hydrocarbon oil, ester oil, ether oil, silicone oil, and higher alcohol.

[0051] Examples of hydrocarbon oils include straight-chain or branched-chain hydrocarbon oils such as squalane, liquid paraffin, liquid isoparaffin, polybutene, hydrogenated polyisobutene, hydrogenated polydecene, and petrolatum.

[0052] Ester oils include monoester oils, diester oils, triester oils and tetraester oils.

[0053] Examples of monoester oils include monoesters of aliphatic or aromatic monocarboxylic or dicarboxylic acids having 2 to 24 carbon atoms. Specific examples include cetyl 2-ethylhexanoate, cetyl octanoate, isononyl isononanoate, isotridecyl isononanoate, hexyl laurate, isopropyl myristate, octyldodecyl myristate, myristyl myristate, 2-hexyldecyl myristate, isopropyl palmitate, octyl palmitate, 2-hexyldecyl palmitate, butyl stearate, isocetyl stearate, isocetyl isostearate, decyl oleate, isodecyl benzoate, octyl methoxycinnamate, hexyldecyl dimethyloctanoate, cetyl lactate, myristyl lactate, lanolin acetate, 2-ethylhexyl succinate, 2-hexyldecyl adipate, and alkyl benzoates (C12 to C15).

[0054] Examples of diester oils include diesters of dicarboxylic acids having 3 to 18 carbon atoms and difatty acid esters of polyhydric alcohols. Specific examples include propylene glycol dicaprylate, neopentyl glycol dicaprate, glycol distearate, propylene glycol diisostearate, glyceryl diisostearate, diglyceryl diisostearate, polyglyceryl diisostearate, glyceryl monomyristate monoisostearate, glycerin di-2-heptylundecanoate, di-2-ethylhexyl succinate, diisopropyl sebacate, diisostearyl malate, ethylene glycol di-2-ethylhexanoate, diisobutyl adipate, di-2-heptylundecyl adipate, and di-2-ethylhexyl sebacate.

[0055] Triester oils include tri-fatty acid esters of trivalent or higher polyhydric alcohols, and specific examples include glyceryl trimyristate, glyceryl triisopalmitate, glyceryl tri-2-heptylundecanoate, trimethylolpropane triethylhexanoate, trimethylolpropane trioctanoate, tri(caprylic / capric)glycerin, glyceryl trioleate, glyceryl tri-2-ethylhexanoate, glyceryl triisostearate, diglyceryl triisostearate, polyglyceryl triisostearate, olive oil, and jojoba oil.

[0056] Examples of tetraester oils include tetra-fatty acid esters of tetrahydric or higher polyhydric alcohols, and specific examples include pentaerythrite tetra(behenate / benzoate / ethylhexanoate), pentaerythrite tetraethylhexanoate, pentaerythrite tetraoctanoate, pentaerythrite tetra-2-ethylhexanoate, pentaerythrityl tetraisostearate, and dipentaerythrityl tetraisostearate.

[0057] Examples of pentaester oils include penta-fatty acid esters of pentahydric or higher polyhydric alcohols, and specific examples thereof include pentaerythrityl pentaisostearate and dipentaerythrityl pentaisostearate.

[0058] The ether oils include dialkyl ethers, and specific examples thereof include dihexyl ether, dicaprylyl ether, and cetyl-1,3-dimethylbutyl ether.

[0059] Examples of silicone oils include crosslinked methylpolysiloxane, network methylpolysiloxane, dimethylpolysiloxane, methyltrimethicone, dimethylcyclopolysiloxane, diphenyldimethicone, diphenylsiloxyphenyltrimethicone, trimethylpentaphenyltrisiloxane, and higher alcohol-modified organopolysiloxane.

[0060] Examples of higher alcohols include those having a linear or branched alkyl or alkenyl group having 10 to 24 carbon atoms, such as lauryl alcohol, myristyl alcohol, isocetyl alcohol, isostearyl alcohol, 2-octyldodecanol, and oleyl alcohol.

[0061] The non-volatile solvents can be used alone or in combination of two or more.

[0062] The content of the non-volatile solvent in the cosmetic composition is preferably 0.05% by mass or more, more preferably 0.1% by mass or more, and even more preferably 0.5% by mass or more. The content of the non-volatile solvent in the composition is preferably 50% by mass or less, more preferably 30% by mass or less, and even more preferably 10% by mass or less. By ensuring that the content is within this range, the hardness of the composition after solidification, i.e., the solid cosmetic preparation, can be made appropriate for use as a cosmetic preparation, and the composition will have excellent shape retention, impact resistance, and feel when used.

[0063] The binder (C) used in the present invention is used for the purpose of binding the particles of the cosmetic powder together, thereby adjusting the hardness of the composition after it has been discharged from the nozzle and solidified, and achieving a good balance between the feel when used.

[0064] Examples of binders include highly water-absorbent polymers, water-soluble polymers, and oil-soluble coating agents. Examples of highly water-absorbent polymers include sodium acrylate-grafted starch, sodium polyacrylate, polyacrylate crosspolymer-6, and (ammonium acryloyldimethyltaurate / VP) copolymer.

[0065] Examples of water-soluble polymers include plant-based polymers such as gum arabic, tragacanth, arabinogalactan, locust bean gum (carob gum), guar gum, karaya gum, carrageenan, pectin, agar, quince seed (quince), starch (rice, corn, potato, wheat), algae colloid, tolanthus gum, and locust bean gum; microbial-based polymers such as xanthan gum, dextran, succinoglucan, and pullulan; animal-based polymers such as collagen, casein, albumin, deoxyribonucleic acid (DNA) and salts thereof; starch-based polymers such as carboxymethyl starch and methylhydroxypropyl starch; methylcellulose, ethylcellulose, methylhydroxypropylcellulose, carboxymethylcellulose, ... Examples of suitable polymers include cellulose-based polymers such as dimethyl cellulose, hydroxymethyl cellulose, hydroxypropyl cellulose, nitrocellulose, sodium cellulose sulfate, sodium carboxymethyl cellulose, crystalline cellulose, and cellulose powder; alginic acid-based polymers such as sodium alginate and propylene glycol alginate; vinyl-based polymers such as polyvinyl methyl ether, polyvinylpyrrolidone, and carboxyvinyl polymer; polyoxyethylene-based polymers such as polyethylene glycol and polyethylene glycol silane; polyoxyethylene-polyoxypropylene copolymer-based polymers; and acrylic polymers such as sodium polyacrylate, polyethyl acrylate, and polyacrylic acid amide.

[0066] The oil-soluble film-forming agent is soluble in an oil such as a volatile oil and forms a film after drying. It is not particularly limited as long as it is one commonly used in cosmetics. Examples of suitable oil-soluble film-forming agents include terpene resins, silicone resins, hydrocarbon resins, and vinyl acetate resins. Specific examples include silicone resins such as trimethylsiloxysilicate, polymethylsilsesquioxane, and acrylic-modified silicone; rosin-modified phenolic resins; rosin acid resins such as rosin acid esters; candelilla resins; vinyl acetate resins; polyisobutylene; silicone / polyether polyurethane resins; (acrylates / propyl methacrylate trimethicone) copolymers; (acrylates / dimethicone) copolymers; 3-[tris(trimethylsiloxane)silyl]propylcarbamate pullulan; polyether-grafted acrylic silicones; and fluoro-modified silicone resins.

[0067] The binder may be used alone or in combination of two or more.

[0068] The content of the binder in the composition varies depending on the purpose, but the total amount is preferably 0.01% by mass or more, more preferably 0.05% by mass or more, and even more preferably 0.15% by mass or more. The content of the binder in the composition is preferably 12% by mass or less, more preferably 7.5% by mass or less, and even more preferably 5% by mass or less. By ensuring that the content is in this range, a good balance can be achieved between the hardness of the composition after solidification, that is, the solid cosmetic preparation, and the feel when used.

[0069] The cosmetic composition used in the present invention may contain other ingredients, such as one or more ingredients selected from surfactants, sequestering agents, pH adjusters, antioxidants, fragrances, preservatives, etc., as appropriate, within a range that does not impair the effects of the present invention. [Example]

[0070] The present invention will be described in more detail below with reference to examples, but the scope of the present invention is not limited to these examples.

[0071] [Examples 1 to 10 and Comparative Examples 1 to 9] A cosmetic slurry prepared by mixing the raw materials shown in Tables 1 and 2 below was used as Composition L.

[0072] Next, a molded product for the powder cosmetic was used as the object 70, and the above-mentioned composition L was continuously supplied onto it to carry out a modeling process. Composition L was filled into a 30 ml SUS dispenser and attached to a three-dimensional modeling device (Musashi Engineering, SM100SX-3A-SS). The dispenser was moved according to the three-dimensional data, and composition L was pressurized and discharged (unheated) from a nozzle (diameter 1 mm) at an air pressure of 0.1 MPa, forming a solid powder cosmetic consisting of a three-dimensional object (drawn lines approximately 1.2 mm thick and approximately 0.5 mm thick) with the design shown in Figure 5 on the molded product for the powder cosmetic. In this way, a three-dimensional object consisting of the deposit S was formed on the object 70. As a result, a makeup cosmetic having the appearance shown in Figure 5 was obtained. The molded product of the powder cosmetic, which served as the base object 70, was produced in the following manner: 90% by mass of the cosmetic powder and 10% by mass of the non-volatile solvent were mixed using a Henschel mixer, and then 3 g of the mixture was filled into a metal dish measuring 26.5 mm in length, 26.5 mm in width, and 3.5 mm in height, and pressed into a mold. The molded product was placed in a plastic compact container that could fit the metal dish, yielding object 70. The viscosity (25°C) of composition L and the maximum length of the nozzle cross section in the modeling process were set as shown in the following Tables 1 and 2. The viscosity of composition L was measured by the measurement method described above.

[0073] 〔evaluation〕 For each of the Examples and Comparative Examples, ejection properties, drainage properties, impact resistance, and usability were evaluated by the following methods. The results are shown in Tables 1 and 2.

[0074] [Dischargeability] The cosmetic composition was filled into a 30 ml stainless steel dispenser, and the cosmetic composition was continuously ejected from the nozzle for 1 minute at an air pressure of 0.1 MPa. The ejection properties at that time were visually evaluated. The evaluation criteria were as follows: ◯: Continuous discharge was possible without clogging. △: Although there was some clogging and discontinuity, ejection was possible to the end. ×: Clogging occurred and ejection became impossible.

[0075] [Liquid drainage] The cosmetic composition was filled into a 30 ml stainless steel dispenser, and the cosmetic composition was ejected from the nozzle using an air pressure of 0.1 MPa. At this time, ejection for 1 second and stopping for 1 second were repeated 60 times. The liquid drainage was then visually evaluated. The evaluation criteria were as follows: ○: No liquid leaked from the nozzle when stopped. △: A small amount of liquid leaked from the nozzle when stopped. ×: Liquid was constantly leaking from the nozzle when stopped.

[0076] [Impact resistance] The cosmetic was dropped horizontally onto an acrylic plate from a height of 40 cm (with the bottom of the compact container shown in Figure 5 facing downwards), and the number of times it was dropped was counted until the formed solid cosmetic broke or peeled off from the object 70. The evaluation criteria were as follows: 〇: More than 10 times. △: 5 to 9 times. ×: Less than 5 times.

[0077] [Feeling of use] The amount of cosmetic removed during use was visually evaluated, and the evaluation criteria were as follows: 〇: Can be taken in appropriate amounts. △: A little too much or too little is harvested. ×: Too much or no fruit is harvested.

[0078] [Table 1]

[0079] [Table 2]

[0080] In Tables 1 and 2, *1 to *3 are as follows: *1: Covacryl MV60 (Sensient Technologies Japan Co., Ltd.) *2: SEPIMAX ZEN (manufactured by SEPPIC) *3: SR1000 (Momentive Performance Materials)

[0081] As is clear from the results shown in Tables 1 and 2, the cosmetic compositions of the Examples have good ejection properties and drainage properties. Furthermore, the Examples provide cosmetic compositions with good impact resistance and a good feel when used.

Claims

1. A method for producing a solid cosmetic product, comprising: a step of continuously discharging a fluid cosmetic composition from a nozzle in an unheated state in a linear shape, a curved shape, or a combination thereof, while moving the nozzle relative to an object, thereby forming a solid cosmetic composition consisting of a three-dimensional linear deposit on the object; a solidification step of drying the deposit, The deposit after the solidification step is used as it is as the solid cosmetic product, The cosmetic composition comprises: (A) a volatile solvent selected from water or organic solvents having a flash point of 10°C to 87°C; (B) a non-volatile solvent having a flash point of 88°C or higher; (C) a binder; and (D) a cosmetic powder. The cosmetic composition has a viscosity at 25°C of 0.1 Pa·s or more and 2000 Pa·s or less, The cosmetic composition has a content of the volatile solvent of 25% by mass or more and 70% by mass or less, The cosmetic composition has a content of the non-volatile solvent of 0.5% by mass or more and 10% by mass or less, The cosmetic composition has a binder content of 0.15% by mass or more and 5% by mass or less, The cosmetic composition has a cosmetic powder content of 20% by mass or more and 70% by mass or less, the nozzle has a cross section perpendicular to the flow direction of the cosmetic composition, the cross section having a maximum length of 0.01 mm or more and 5 mm or less; A method for producing a solid cosmetic, wherein the cosmetic composition after being discharged and solidified has a penetration hardness at 25°C of 10 g or more and 10,000 g or less.

2. The method according to claim 1 , wherein the organic solvent that is the volatile solvent is a water-soluble organic solvent or an oil-based solvent.

3. The method according to claim 1 or 2, wherein the non-volatile solvent is a water-soluble organic solvent or an oil-based solvent.

4. After forming a first solid cosmetic product on the object by the above process using the first cosmetic composition, 4. The manufacturing method according to claim 1, wherein a second solid cosmetic composition is shaped on the first solid cosmetic composition and / or on the object by the process using a cosmetic composition that is the same as or different from the first cosmetic composition.

5. A manufacturing method described in any one of claims 1 to 4, wherein in the process, shaping is performed under conditions where the value of H1 / D1, which is the ratio of the maximum length D1 of the cross section of the nozzle to the distance H1 between the tip of the nozzle and the object, is 0.3 or more and less than 3, and the supply rate of the cosmetic composition is 0.05 mm 3 / s or more and 150 mm 3 / s or less.

6. A manufacturing method described in any one of claims 1 to 5, wherein in the solidification process, the deposit is dried under non-heating conditions.

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