JP2010053082A - Solid powdery cosmetic and method for producing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a solid powdery cosmetic having a projecting part having high stereoscopicity, and uniform and high hardness as a whole, and being excellent in taking-up property of the powder during using. <P>SOLUTION: This solid powdery cosmetic is provided by compression-molding raw material powder containing ≤15 mass% liquid component, having an approximately flat form having an upper surface and a lower surface and also providing a projecting part at the upper surface. The ratio (H1/D1) of height H1 from the datum level of the upper surface to the highest position of the projecting part to a crossing length D1 in a straight line drawn as passing through the highest position so as to make the crossing length of the powdery cosmetic as a minimum by planar view is 0.05 to 0.4, and the difference of hardness of the powdery cosmetic in the height direction is within 20%. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a solid powder cosmetic and a method for producing the same.

  For the purpose of imparting a design property to a solid powder cosmetic and enhancing a high-class feeling or the like, a technique for making the surface into a three-dimensional shape is known. For example, Patent Document 1 proposes a method for molding the surface of a solid powder cosmetic into a variety of three-dimensional shapes such as a dome shape, a hemispherical shape, a conical shape, a pyramidal shape, and a diamond cut shape. Further, a solid powder cosmetic having a petal-like convex portion on the surface has also been proposed (see Patent Document 2).

  In the production of the solid powder cosmetic having the above-described shape, if the shape of the convex portion having high three-dimensionality is to be molded with high pressure such as hydraulic pressure or electric servo press, the air density in the convex portion is poor and the density of the convex portion is low. It tends to be low and the strength is insufficient. When the press pressure is increased to increase the strength, the molded body is cracked or cracked due to the springback phenomenon of the molded body. These phenomena are not limited to the convex shape, but are the same even when the longitudinal section of the molded body is triangular or semicircular. For this reason, the height and shape of a convex part cannot be designed freely, and it is not easy to manufacture a solid powder cosmetic material having a high design and a solid shape.

  In the production of solid powder cosmetics, it has been proposed to use ultrasonic waves when using the above-described hydraulic or electric servo press devices (see Patent Documents 3 and 4). In particular, in the method described in Patent Document 4, when a powder mixture containing 5 to 80% by weight of a thermoplastic material having a particle size of 5 to 500 μm is placed on the bottom of a pressurizing chamber and pressurized with a piston, Applying sonic power. According to these methods, it is said that compression molding at a low pressure is possible as compared with conventional high pressure press molding. Moreover, although it is said that a convex shape may be sufficient as a cross section, it is not easy to obtain the thing which has uniform hardness over the whole and was excellent in the powder taking-out property at the time of use.

Japanese Patent Laid-Open No. 5-201829 JP 2001-213721 A JP-A 63-275511 JP-A-5-70325

  An object of the present invention is to provide a solid powder cosmetic and a method for producing the same that can eliminate the disadvantages of the above-described conventional techniques.

The present invention is a solid powder cosmetic material having a substantially flat shape formed by compression molding a raw material powder containing a liquid component of 15% by mass or less, having an upper surface and a lower surface and having a convex portion on the upper surface,
A height H1 from the reference surface of the upper surface to the highest position of the convex portion, and the transverse length D1 in a straight line that passes through the highest position and is minimized so that the transverse length of the powder cosmetic is minimized in plan view The ratio (H1 / D1) is 0.05 to 0.4, and a solid powder cosmetic in which the difference in hardness in the height direction of the powder cosmetic is within 20% is provided.

The present invention is also a preferred method for producing the above-described solid powder cosmetic, wherein a raw material powder containing a liquid component of 15% by mass or less is filled in a mold, and the raw material powders are opposed to each other. A substantially flat shape having a top surface and a bottom surface and having a convex portion on the top surface while performing compression molding to compress the raw material powder while applying ultrasonic vibration to the raw material powder with at least one of the molding rods arranged A method for producing a solid powder cosmetic comprising:
Provided a method for producing a solid powder cosmetic that performs pre-molding by applying ultrasonic vibration to the raw material powder in a pulsed manner under a state where a pressure lower than the pressure of the compression molding is applied before compressing the raw material powder. To do.

  According to the present invention, there is provided a solid powder cosmetic having convex portions with high three-dimensionality, having a uniform and high hardness throughout, and having excellent powder take-up properties during use. be able to.

  The present invention will be described below based on preferred embodiments with reference to the drawings. FIG. 1 shows a perspective view of an embodiment of the solid powder cosmetic of the present invention. Fig.2 (a) is a top view of the cosmetics shown in FIG. 1, FIG.2 (b) and (c) are the bb sectional view taken on the line in FIG.2 (a), and the cc sectional view. . The cosmetic 1 according to the present embodiment is characterized in that it has a uniform and high hardness throughout the whole despite having convex portions with a high degree of three-dimensionality, and also has an excellent powder take-out property during use. is there.

  As shown in FIGS. 1 and 2 (a), the cosmetic 1 has a rectangular shape with rounded corners in plan view. As shown in FIG. 2A, this rectangle is composed of a long side L1 (described in FIG. 2) and a short side L2. As shown in FIG.2 (b) and FIG.2 (c), the cosmetics 1 have the upper surface 1a and the lower surface 1b facing this. The lower surface 1b has a flat horizontal surface. On the other hand, the upper surface 1 a has a base surface portion 2 made of a flat horizontal surface located at the peripheral edge portion thereof, and a three-dimensional solid surface portion 3 smoothly connected to the base surface portion 2. The three-dimensional surface portion 3 has a slope portion 3a and a top surface portion 3b parallel to the lower surface 1b. A portion above the base surface portion 2 is a three-dimensional convex portion 4.

  The convex portion 4 has a trapezoidal shape when viewed along the line bb. Moreover, it is trapezoid even if it sees in the cc line cross section. And the cosmetic 1 which has the convex-shaped part 4 of such a shape is carrying out the substantially flat shape when it sees as the whole.

  As described above, the cosmetic 1 of the present embodiment has a high three-dimensionality of the convex portion 4. In this embodiment, H1 / D1 is adopted as a measure of the three-dimensionality of the convex portion 4. Here, H1 is defined as the height from the base surface portion 2 which is the reference surface of the upper surface 1a to the highest position of the convex portion 4. D1 is defined by the crossing length in a straight line that passes through the highest position of the convex portion 4 and is drawn so that the crossing length of the cosmetic 1 is minimized in the plan view of the cosmetic 1. In the present embodiment, since the cosmetic 1 has a rectangular shape in plan view, D1 coincides with L2 that is the short side of the rectangle.

  When two or more highest positions with the same height exist in the convex portion 4, the position where the value of D1 is the smallest is defined as the highest position. Moreover, depending on the shape of the convex part 4, as shown in FIG. 3, the cosmetic 1 whole may comprise the convex part 4, and a horizontal flat part may not exist. The base surface portion in such a case is defined as the lowest position of the convex portion 4, and the height from that position to the highest position is H1.

  In the present embodiment, the above-mentioned H1 / D1, which is a measure of the three-dimensionality of the convex portion 4, is set in the range of 0.05 to 0.4, preferably in the range of 0.1 to 0.3. By setting the value of H1 / D1 within this range, a sufficient three-dimensional effect can be imparted to the cosmetic 1, and a cosmetic with high design properties can be obtained.

  Although the value of H1 / D1 of cosmetic 1 is in the above-described range, the values of H1 and D1 themselves are preferably as follows according to the specific use of cosmetic 1. When the cosmetic 1 is, for example, an eye shadow, this range can be set to 0.5 to 5 mm, particularly 1 to 3 mm for H1. About D1, 5-30 mm is generally used. From the same viewpoint, when the cosmetic 1 is, for example, a foundation, this range can be set to 1 to 5 mm, particularly 2 to 5 mm for H1, and 30 to 60 mm is generally used for D1. In addition, the height H2 from the lower surface 1b of the cosmetic 1 to the base surface portion 2 is not critical in the present embodiment, and can be appropriately set according to a specific application or the like of the cosmetic 1.

Cosmetics in which the value of H1 / D1 is set in the above-described range can generally be made uniform in the pressure applied to each part in plan view due to its three-dimensional shape when manufactured by compression molding. Not easy. On the other hand, the cosmetic 1 of this embodiment has one of the characteristics in that the hardness in each part is uniform. As a measure for hardness uniformity, in this embodiment, the hardness (hereinafter, referred to as a stylus φ0.16 mm, length 0.5 mm) measured by a micro rubber hardness meter MD-1 (manufactured by Kobunshi Keiki Co., Ltd., stylus φ0.16 mm, length 0.5 mm). "Asker hardness"). And the hardness difference of the height direction of the cosmetics 1 is 20% or less, Preferably it is 15% or less. As shown in FIG. 4, the hardness difference in the height direction of the cosmetic 1 is divided into at least three equal parts of the hardness A _{1 on} the upper surface 1a of the cosmetic 1 and the cosmetic 1 from the upper surface 1a toward the lower surface 1b. Asker hardness A ₂ , A ₃ in each layer when the lower layer is sequentially scraped in parallel with the bottom surface so as not to break and compact with a simple milling machine or the like (eg, MDX-40 manufactured by Roland)・ A _n is measured, and the difference between the maximum value A _Max and the minimum value A _Min of the measured Asker hardness is divided by the minimum value A _Min and multiplied by 100, that is, [(A _Max −A _Min ) / A _Min ] × 100. In addition, the Asker hardness of each layer may measure several points and use the average value.

  In the measurement of Asker hardness, when measuring the same place or a place close to each other (for example, a distance within 2 mm) in each layer, taking into account the amount of penetration of the hardness meter needle (0.5 mm), makeup The thickness of scraping off the material 1 is preferably 1 mm or more. On the other hand, in each layer, there is no particular limitation on the thickness at which the cosmetic material 1 is scraped when the hardness measurement site can be separated. However, there is no particular technical meaning in reducing the thickness to be scraped excessively, and it is generally sufficient to scrape with a thickness of about 0.5 to 2 mm.

  The cosmetic 1 may be directly molded by filling the raw material powder in a mold, or may be obtained by compression molding the raw material powder in a container. The container generally has a shallow dish-like shape having a flat bottom surface and an opening having the same shape as the bottom surface on the bottom surface. The cosmetic 1 integrally molded in such a container can be used as it is for cosmetic product forms such as foundations, eye shadows, and teaks.

  Cosmetic 1 is manufactured using the raw material powder containing a liquid component of 15 mass% or less. The liquid component mentioned here includes, for example, water and an aqueous component such as a water-soluble organic solvent such as a lower alcohol, and an oily component that is liquid at room temperature. When the raw material powder having a liquid component of more than 15% by mass is used, the liquid crosslinking power becomes high, and it becomes difficult to obtain the effect of fluidization by ultrasonic waves.

  As a constituent component of the raw material powder, an appropriate one is selected according to the specific use of the cosmetic 1. When the cosmetic 1 is a foundation or teak, for example, the powder component is preferably contained in an amount of 85 to 95% by mass, more preferably 85 to 90% by mass. Examples of the powder component include extender pigments such as talc, mica, sericite, and kaolin, colored pigments such as bengara, yellow iron oxide, and black iron oxide, and bright pigments such as pearl pigments. In addition to the powder component, the cosmetic 1 can appropriately contain a surfactant, an antiseptic, an antioxidant, a fragrance, an ultraviolet absorber, a moisturizer, a bactericide, and the like.

  In particular, when the cosmetic 1 is produced by the method described later, the solid oily component having a melting point of 40 to 150 ° C. is preferably 0.5 to 10% by mass, more preferably 1 to 1%, in the raw material powder. 5% by mass is contained. As a result, it is possible to easily obtain a cosmetic material that has a uniform and high hardness throughout and is excellent in the ability to be removed during use. Examples of the oil component include animal waxes such as beeswax and whale wax; plant waxes such as carnauba wax, candelilla wax, rice wax, and wood wax; minerals such as montan wax, ozokerite, ceresin, paraffin wax, and microcrystalline wax. Synthetic waxes such as polyethylene wax, hydrogenated castor oil, hydrogenated jojoba oil, stearamide, and silicon wax can be used.

  The schematic diagram of the preferable apparatus used in order to manufacture the cosmetics 1 of this embodiment is shown by FIG. The apparatus 10 includes a frame body 11. A molding table 12 is attached to the center of the frame 11 in the height direction in the horizontal direction. A through hole is provided in the center of the molding table 12, and a tablet molding die 13 is fitted in the through hole. The mold 13 has a cylindrical shape whose upper and lower sides are open. The mold 13 has a flange 13a projecting laterally at the top. The flange 13a is bolted (not shown) to the molding table 12.

  Ultrasonic vibrating elements 14 a and 14 b are arranged at positions above and below the cylindrical opening of the mold 13. Each element 14a, 14b is supported by air cylinders 15a, 15b. The upper air cylinder 15a is attached to the top plate 11a of the frame 11 and hangs from it. On the other hand, the lower air cylinder 15 b is mounted on the bottom plate 11 b of the frame body 11. Thereby, each ultrasonic vibration element 14a, 14b can be moved in the vertical direction. Note that the moving means of the ultrasonic vibration element is not limited to the air cylinder, and other devices such as a hydraulic cylinder or a ball screw press using an electric motor may be used.

  Horns 16a and 16b are attached to the tips of the ultrasonic vibration elements 14a and 14b. The tips of the horns 16a and 16b have the same shape as the cylindrical opening of the molding die 13. These three are located on the same axis. Each horn 16a, 16b has a role of giving ultrasonic vibration to the raw material powder when compressing the raw material powder of the cosmetic 1, and a role as a molding cage for compressing the raw material powder. Yes. Therefore, in the following description, these horns will be referred to as an upper rod 16a and a lower rod 16b, respectively. The tip shapes of the flanges 16 a and 16 b are the same as the cylindrical opening of the mold 13.

  The manufacturing method of the cosmetic 1 using the apparatus 10 having the above structure will be described with reference to FIGS. 6A to 6C. First, as shown in FIG. 6A, the lower air cylinder 15b is operated. Then, the lower brace previously inserted in the mold is lowered in the mold in order to fill the raw material powder. Further, the upper air cylinder 15a is operated, and the upper rod 16a is raised and retracted in the space on the molding table 12. As a result, a concave portion defined by the cylindrical opening and the lower collar 16b is formed in the mold 13. The raw material powder 20 is filled in the recess.

  Next, the air cylinder 15a is operated to lower the upper rod 16a, and the upper rod 16 is inserted into the concave portion filled with the raw material powder 20. The position of the upper iron 16a is fixed, and then the lower iron 16b is raised, and the raw material powder 20 is molded by applying a compressive force as shown in FIG. 6 (b). In the case where the raw material powder is filled in a container (for example, a shallow dish-shaped container) and molded, a container (not shown) is placed on the lower iron 16b before the lower iron 16b is lowered in the mold. ) And then lower the lower arm 16b. Alternatively, after lowering the lower punch 16b, a container (not shown) is placed on the lower punch in the mold. Thereafter, the process of filling and compressing the raw material powder in the container is the same as when the container is not used.

  In order to further reduce the hardness difference in the height direction of the cosmetic material to be obtained, it is preferable to perform preliminary compression before the main molding. Preliminary molding consists of applying ultrasonic vibration to the raw material powder 20 in a pulsed manner under a state where a pressure lower than the pressure of the main molding is applied before performing the main molding. By performing this preliminary molding prior to the main molding, the raw material powder 20 is more effectively homogenized in the concave portion of the mold, and air venting is promoted. As a result, it is possible to obtain a cosmetic 1 that has a uniform and high hardness throughout, and has a convex portion 4 with a high degree of stericity that is excellent in ease of use. The application of the ultrasonic vibration may be performed using both the scissors 16a and 16b with the vibration conditions of the scissors 16a and 16b being the same or different, or may be performed by vibrating only one of the scissors. .

  FIG. 7 shows an example of operating conditions for pre-molding and subsequent main molding. In the figure, the solid line indicates the pressure applied to the raw material powder 20, and the alternate long and short dash line indicates the position of the lower punch 16b (the amount of increase from the start of pre-forming). The dotted line indicates the timing of application of ultrasonic vibration, and indicates that ultrasonic vibration is being applied when the pulse is in a lowered state.

  As shown in FIG. 7, in the preliminary molding, a lower pressure than that in the main molding is applied to the raw material powder 20. The pressure at the time of the pre-molding is preferably 10 to 70%, particularly 20 to 50% of the pressure of the main molding from the viewpoint of homogenizing the raw material powder 20 and promoting air bleeding. The application time of ultrasonic vibration applied during the pre-molding is preferably 50 to 300 milliseconds, particularly 100 to 200 milliseconds. If the application time is long, the solid oil component may melt and solidify due to frictional heat generated by ultrasonic vibrations, which may hinder homogenization and air bleeding, so that the solid oil component does not melt due to frictional heat. It is advantageous to employ an application time of The frequency of the ultrasonic waves is preferably 10 to 100 kHz, particularly 15 to 30 kHz. The number of pulses applied is preferably 1 to 5 times, particularly preferably 2 to 3 times. The pulse application interval is preferably 50 to 300, particularly 100 to 200 milliseconds. The application time of each time may be the same on condition that it is in the above-mentioned range, or may be different. The same applies to the application interval and frequency.

  Once the preliminary molding is completed, the main molding is continued. The main molding is performed by further increasing the pressure at the time of preliminary molding without releasing the upper collar 16a and the lower collar 16b. Specifically, the position of the upper punch 16a is the same as that at the time of preforming, and the lower punch 16a is further raised to apply pressure to the raw material powder 20. While raising the lower eyelid 16b, ultrasonic vibration may be applied to the raw material powder 20, or no ultrasonic vibration is applied until the lower eyelid 16b rises to a predetermined position. Application of ultrasonic vibration may be performed at the time when reaches a predetermined position. Under the operating conditions shown in FIG. 7, the application of ultrasonic vibration is started when the lower eyelid 16b reaches a predetermined position.

  In the main molding, compression molding is performed while applying ultrasonic vibrations by the upper and lower ridges 16a and 16b arranged opposite to each other with the raw material powder 20 interposed therebetween. The components of the raw material powder 20 are vibrated by receiving ultrasonic waves, thereby generating frictional heat. Due to this frictional heat, the solid oil component having a melting point of 40 to 150 ° C. contained in the raw material powder 20 is melted to bond the particles together. By applying ultrasonic vibration from above and below the raw material powder 20, the vibration of the particles is promoted, and the strength of the bonding of the powder becomes uniform. As a result, compared with the method described in Patent Document 4 or the like in which compression molding is performed while applying ultrasonic vibration only by one of the scissors, the strength of the compression molded product is comparable even if the compression pressure is lowered. It becomes possible to make it higher. As a result, it is possible to easily obtain the cosmetic 1 having excellent take-off properties despite its high hardness. The vibration conditions of each of the flanges 16a and 16b may be the same or different, but generally the same conditions are set.

  Although depending on the specific application and composition of the cosmetic 1, in this molding, the pressure applied by the upper and lower ridges 16a and 16b is preferably 0.1 to 2.5 MPa, more preferably 0.1 to 1.0 MPa. Can be set to a low pressure. On the other hand, in the method described in Patent Document 4 and the like in which compression molding is performed while applying ultrasonic vibration only by one of the scissors, the compression molding is performed at a pressure higher by one digit or more than the present manufacturing method.

  The ability to set the pressure to a low value has an advantage that physical damage is reduced with respect to the raw material component as the main agent. In this embodiment, the raw material powder may contain a liquid component. Even in such a case, since the pressure of the main molding is low, the powder component is destroyed and the liquid component is stained. There is no problem with quality and no trouble in production due to this.

  The conditions of the ultrasonic vibration applied to the raw material powder 20 can be appropriately adjusted according to the components of the raw material powder 20, the blending amount thereof, the specific use of the target cosmetic 1, and the like. When the cosmetic 1 is, for example, a foundation or a teak, the frequency of the ultrasonic wave is preferably 10 to 100 kHz, particularly 15 to 30 kHz. By setting the frequency within this range, the degree of attenuation of the ultrasonic wave in the raw material powder 20 that is a medium is reduced, and vibration is transmitted to the deep part of the raw material powder 20.

  When the cosmetic 1 is, for example, a foundation or a cheek, the ultrasonic amplitude is preferably 5 to 100 μm, particularly preferably 10 to 50 μm. By setting the amplitude within this range, the vibration of the particles becomes sufficiently large, and sufficient frictional heat is generated due to this. As a result, molding in a short time becomes possible.

  The application time of ultrasonic vibration is sufficient even for a short time, and is not particularly critical in the present embodiment. The reason for this is that ultrasonic vibration is applied from above and below across the raw material powder 20. The application time is preferably 0.1 to 5 seconds, more preferably 0.2 to 2.0 seconds. Depending on the melting point and blending amount of the oil component and the weight and thickness of the raw material powder 20, if it is applied for an excessively long time, the surface becomes high temperature, the deterioration of the raw material, the melt solidification of the oil component proceeds, and the excess hardness (cosmetics 1 It may be difficult to remove powder when using), increased adhesion to wrinkles, and color burn.

  When the main molding is completed, the ultrasonic vibration is stopped, the upper air cylinder 15a is operated as shown in FIG. 6C, and the upper rod 16a is lifted and retracted in the space on the molding table 12. Further, the lower air cylinder 15b is operated and the lower rod 16b is also raised. As a result, the target cosmetic 1 is taken out from the cylindrical opening of the mold 13.

  The cosmetic 1 thus obtained is used as a foundation, teak, eye shadow or the like as described above.

  As mentioned above, although this invention was demonstrated based on the preferable embodiment, this invention is not restrict | limited to the said embodiment. For example, in the above-described embodiment, both the upper eyelid 16a and the lower eyelid 16b are vibrated and ultrasonic vibration is applied. Instead, only one of the upper eyelid 16a and the lower eyelid 16b is used for ultrasonic waves. Vibration may be applied.

  In the above-described embodiment, for the purpose of preventing the raw material powder 20 from adhering to the upper bowl 16a, an anti-adhesion inclusion such as a polytetrafluoroethylene sheet may be interposed therebetween. Alternatively, a mesh pattern may be applied to the surface of the cosmetic 1 by interposing a non-woven fabric and / or a woven fabric to give the cosmetic 1 a higher-class feeling.

  Hereinafter, the present invention will be described in more detail with reference to examples. However, the scope of the present invention is not limited to such examples. Unless otherwise specified, “%” means “mass%”.

[Example 1]
A cheek was produced by the method shown in FIG. 6 using the apparatus shown in FIG. As the ultrasonic vibration elements 14a and 14b in the apparatus 10, Langevin elements (oscillation frequency 19 kHz, maximum output 1200 W, maximum amplitude 26 μm) manufactured by Seidensha Electronics Co., Ltd. were used. As the powder raw material 20, the compositions shown in Table 1 below were mixed and used.

  The apparatus shown in FIG. 5 was changed to the state shown in FIG. 6A, and 5 g of raw material powder was filled in the concave portion of the mold. Next, the upper collar 16a was lowered and inserted into the recess, and fixed at a predetermined position, as shown in FIG. 6 (b). Pre-molding was performed under this condition. The conditions for the pre-molding are as shown in Table 2 below.

  Subsequent to the preliminary molding, the main molding was performed. The conditions for the main molding are as shown in Table 3 below.

  After completion of the main molding, the ultrasonic vibration is stopped, the upper eyelid is raised and retracted, and the lower eyelid is also raised, so that the solid powder cosmetic as the object is put into the mold as shown in FIG. It was taken out from. In this solid powder cosmetic, H1 was 3 mm, D1 was 24 mm, and H1 / D1 was 0.125.

[Example 2]
In Example 1, a solid powder cosmetic (teak) having the same shape and the same size as that of Example 1 was produced in the same manner as Example 1 except that the preforming was not performed.

[Comparative Example 1]
Using the raw material powder shown in Table 1 above, compression is performed at a pressure of 18 MPa using a mold and a punch that can form a solid powder cosmetic of the same shape and size as in Example 1 and a hydraulic cylinder as a pressurizing device. Molded. The filling amount was 5 g as in Example 1. In this way, a solid powder cosmetic (teak) was produced.

[Evaluation]
About the solid powder cosmetics obtained in Examples and Comparative Examples, the hardness difference in the height direction was measured by the method described above. In addition, the appearance was visually evaluated. Furthermore, sensory evaluation was performed on the powder take-off property by 10 expert panelists, and the determination was made according to the following criteria. These results are shown in Table 4 below.

[Evaluation of powder removal]
A: Seven or more people evaluated it as good.
B: Four to six people evaluated it as good.
C: Two to three people evaluated it as good.
D: Rated less than 1 person as good.

  As is apparent from the results shown in Table 4, it can be seen that the solid powder cosmetic of Example 1 (product of the present invention) has a uniform hardness as a whole as compared with the solid powder cosmetic of Comparative Example 1. . In addition, it can be seen that, despite its high hardness, it is excellent in powder picking and can be molded successfully.

FIG. 1 is a perspective view showing an embodiment of the solid powder cosmetic of the present invention. Fig.2 (a) is a top view of the cosmetics shown in FIG. 1, FIG.2 (b) and (c) are the bb sectional view taken on the line in FIG.2 (a), and the cc sectional view. . FIG. 3 is a longitudinal sectional view showing another embodiment of the cosmetic according to the present invention. FIG. 4 is an explanatory view showing a part for measuring the hardness of the cosmetic. FIG. 5 is a schematic view showing a preferred apparatus used for producing the solid powder cosmetic shown in FIG. FIG. 6 is a diagram showing a manufacturing process of a solid powder cosmetic using the apparatus shown in FIG. FIG. 7 is a graph showing operating conditions for pre-molding and main molding.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Solid powder cosmetics 1a Upper surface 1b Lower surface 2 Base surface part 3 Solid surface part 4 Convex part

Claims (8)

A solid powder cosmetic having a substantially flat shape, which is formed by compression molding a raw material powder containing a liquid component of 15% by mass or less, has an upper surface and a lower surface, and has a convex portion on the upper surface,
A height H1 from the reference surface of the upper surface to the highest position of the convex portion, and the transverse length D1 in a straight line that passes through the highest position and is minimized so that the transverse length of the powder cosmetic is minimized in plan view The ratio (H1 / D1) is 0.05 to 0.4, and the hardness difference in the height direction of the powder cosmetic is within 20%.   The solid powder cosmetic according to claim 1, wherein the raw powder is obtained by compression molding in a container.   The solid according to claim 1 or 2, which is obtained by compression molding a raw material powder containing 0.5 to 10% by mass of a solid oily component having a melting point of 40 to 150 ° C while applying ultrasonic vibration. Powder cosmetic.   The compression molding according to any one of claims 1 to 3, which is obtained by being subjected to a preliminary molding in which ultrasonic vibration is applied in a pulsed manner under a state where a pressure lower than the compression molding pressure is applied before the compression molding. The solid powder cosmetic described in 1.   The solid powder cosmetic according to any one of claims 1 to 4, wherein the shape of the upper surface in the longitudinal section is a trapezoidal shape or a convex dome shape. A raw material powder containing a liquid component of 15% by mass or less is filled in a mold, and ultrasonic vibration is applied to the raw material powder by at least one of molding molds arranged opposite to each other with the raw material powder sandwiched therebetween. A method for producing a solid powder cosmetic material having a substantially flat shape having a top surface and a bottom surface and having a convex portion on the top surface, by performing compression molding by applying compression with both sides,
A method for producing a solid powder cosmetic comprising performing pre-molding by applying ultrasonic vibration to a raw material powder in a pulsed manner under a state in which a pressure lower than the pressure of the compression molding is applied before compressing the raw material powder. The method for producing a solid powder cosmetic according to claim 6, wherein the raw material powder is compression molded in a container.   The manufacturing method of Claim 6 or 7 which uses what contains 0.5-10 mass% of solid oily components whose melting | fusing point is 40-150 degreeC as raw material powder.

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