ANTIBACTERIAL AND SUN-PROTECTIVE POWDERED SOLID COMPACT COMPOSITION WITH DECORATIVE ELEMENTS AND PREPARATION METHOD THEREOF

Abstract

An antibacterial and sun-protective powdered solid compact composition with decorative elements, consisting of the following raw materials in percentage by weight: 15% to 25% of aluminum starch octenylsuccinate and/or calcium starch octenylsuccinate; 45% to 65% of a carrier powder; 1% to 10% of an ultraviolet protective agent; 0.1% to 0.5% of an antibacterial agent; 1% to 5% of a non-expandable polymer powder; 5% to 15% of an viscous fluid skin-feel modifier; 0.1% to 7.5% of a plant extract, wherein the solid raw materials have a particle size of 5-50 m, and the raw materials are thoroughly mixed and compressed to form a powdered solid compact composition with a density of 8-9 g/cm.sup.3. The manufacturing process comprising pre-mixing, blending, pulverizing, standing, and compacting under appropriate pressure enables reduced energy consumption and effectively mitigates safety hazards caused by certain flammable materials during production.

Claims

1. An antibacterial and sun-protective powdered solid compact composition with decorative elements, characterized by comprising the following raw materials in percentage by weight: Aluminum starch octenylsuccinate and/or calcium starch octenylsuccinate: 15%-25%; Carrier powder: 45%-65%; Ultraviolet protective agent: 1%-10%; Antibacterial agent: 0.1%-0.5%; Non-expandable polymer powder: 1%-5%; Viscous fluid skin-feel modifier: 5%-15%; Plant extract: 0.1%-7.5%; wherein: the carrier powder is one or a mixture of mica, kaolin, silica, white clay, bentonite, magnesium stearate, and aluminum magnesium silicate; the non-expandable polymer powder is one or a mixture of polyethylene powder, polytetrafluoroethylene powder, polyamide powder, and PMMA powder; the solid raw materials have a particle size of 5-50 m, and the raw materials are thoroughly mixed and compressed to form a powdered solid compact composition with a density of 8-9 g/cm.sup.3.

2. The antibacterial and sun-protective powdered solid compact composition with decorative elements according to claim 1, characterized in that: the solid raw materials have a particle size of 10-30 m.

3. The antibacterial and sun-protective powdered solid compact composition with decorative elements according to claim 1, characterized in that: based on the total weight percentage, the viscous fluid skin-feel modifier consists of 1%-2% silicone conditioning agent, 1%-5% synthetic ester oil, and 1%-11% alcohol.

4. The antibacterial and sun-protective powdered solid compact composition with decorative elements according to claim 3, characterized in that: the silicone conditioning agent is selected from one or a mixture of polymethylsiloxane, polydimethylsiloxane, alkyl methyl siloxane, and polydimethylcyclosiloxane; the synthetic ester oil is selected from one or a mixture of caprylic triglyceride, capric triglyceride, ethylhexyl palmitate, glyceryl tri(2-ethylhexanoate), diisobutyl adipate, isopropyl palmitate, cetyl 2-ethylhexanoate, and tocopheryl acetate; the alcohol is selected from one or a mixture of propylene glycol, caprylyl glycol, butylene glycol, pentylene glycol, and 3-[2-(ethylhexyl)oxy]-1,2-propanediol.

5. The antibacterial and sun-protective powdered solid compact composition with decorative elements according to claim 1, characterized in that: based on the total weight percentage, the ultraviolet protective agent is one or a mixture of zinc oxide, cerium oxide, and titanium oxide, added in an amount of 5%-10%.

6. The antibacterial and sun-protective powdered solid compact composition with decorative elements according to claim 1, characterized in that: based on the total weight percentage, the carrier powder is composed of a mixture of 15%-20% mica, 10%-15% kaolin, 15%-20% magnesium stearate, and 5%-10% silica.

7. The antibacterial and sun-protective powdered solid compact composition with decorative elements according to claim 1, characterized in that: the plant extract is one or a mixture of aloe vera extract, calendula extract, Bambusa arundinacea extract, sophora flavescens extract, salvia miltiorrhiza powder, ginger extract, and white willow bark extract.

8. A method for preparing the antibacterial and sun-protective powdered solid compact composition with decorative elements according to claim 1, characterized by the following steps: (1) Pre-mixing: At room temperature, add all solid raw materials, except the plant extract and the viscous fluid skin-feel modifier, into a powder mixing vessel according to their weight percentages; Stir at 2000-2500 rpm until uniformly dispersed, while controlling the temperature of the raw material mixture during stirring to not exceed 40 C.; (2) Mixing: Pre-disperse the plant extract into the viscous fluid skin-feel modifier raw material, then spray it into the powder mixing vessel using an atomization device; During the spraying process, intermittently stir multiple times at 2000-2500 rpm until all components are uniformly dispersed, while controlling the temperature of the raw material mixture during stirring to not exceed 40 C.; (3) Secondary Pulverization: Subject the thoroughly dispersed raw material mixture to pulverization using a high-speed pulverizer to convert it into a powder, and sieve the mixed powder through a 100-200 mesh screen; (4) Standing: Allow the sieved mixed powder to stand thoroughly under environmental conditions of 25-28 C. temperature and 40%-60% humidity until the temperature and humidity of the mixed powder stabilize; (5) Compaction: Load the stood mixed powder into a mold, and compact the powder within the mold to form the powdered solid compact composition with a density of 8-9 g/cm.sup.3.

9. The method for preparing the antibacterial and sun-protective powdered solid compact composition with decorative elements according to claim 8, characterized in that: in step (5), the mixed sieved powder is compacted intermittently multiple times at a pressure of 70-80 kg/cm.sup.2.

Description

BRIEF DESCRIPTION OF DRAWINGS

[0039] FIG. 1 is a schematic diagram illustrating one potential product development form of the present invention.

[0040] FIGS. 2A to 2C are schematic diagrams comparing the application effects of the present invention, a commercially available dusting powder, and a commercially available solid powder compact, respectively.

[0041] FIGS. 3A to 3C are schematic diagrams comparing the application effects of the present invention, a commercially available dusting powder, and a commercially available solid powder compact, respectively.

[0042] FIGS. 4A to 4F are schematic diagrams showing the state of the invention after 0 to 250 application cycles.

[0043] FIGS. 5A to 5C are cross-sectional electron micrograph morphology diagrams of Example 1 according to the present invention.

DETAILED DESCRIPTION OF THE EMBODIMENTS

[0044] The embodiments of the present invention will be described in detail below. However, the present invention is not limited to the following embodiments. The preparation methods for Examples 1-8 described below were all conducted under ambient environmental conditions of approximately 25 C. temperature and about 50% humidity, and identical production and processing equipment was used.

Examples 1-4

[0045] The raw materials were formulated according to the following weight percentages:

TABLE-US-00001 component Name of Raw Material Example 1 Example 2 Example 3 Example 4 A Aluminum Starch 20 18 25 17 Octenylsuccinate A Mica 16.5 20 19 19 A Kaolin 13.5 12 11.7 14 A Magnesium Stearate 17 16 16 18 A Silica 8 6 10 7 A Polyethylene 4 3 2 A PMMA 2 2 A Polytetrachloroethylene 1 A Zinc Oxide 7 5.87 3 8 A Sodium Benzoate 0.45 0.25 0.5 0.1 B Caprylic Triglyceride 1.14 1.5 2 1.55 B Polydimethylsiloxane 1.14 1 1.25 B Ethylhexyl Palmitate 1.14 1.5 2 1.05 B Caprylyl Glycol 0.1 0.2 B Ethylhexyl Glycine 0.5 B Polydimethylsiloxane 0.43 0.5 0.25 B Bis-diglyceryl 0.4 0.38 0.3 0.25 Polyacyladipate-2 C Bambusa Arundinacea 3 5 4.5 3 Stem Extract C Aloe Vera Extract - 5 4 0.5 3 Butylene Glycol Mixture C Calendula Officinalis 1.2 3 1 5 Flower Extract - Butylene Glycol Mixture C Sophora Flavescens 0.38 Root Extract

[0046] The raw materials for Examples 1-4 above were grouped into A, B, and C components. The products for Examples 1-4 were prepared by processing components A, B, and C separately according to the following steps: [0047] (1) Pre-mixing: At ambient temperature, Component Acomprising all solid raw materials except the plant extract and the viscous fluid skin-feel modifierwas added to a powder mixing vessel according to its weight percentage. The mixture was stirred at 2000 rpm until uniformly dispersed, while controlling the temperature of the raw material mixture during stirring not to exceed 40 C. [0048] (2) Mixing: The corresponding plant extract was pre-dispersed in butylene glycol at a 1:5 ratio. Subsequently, the mixed Component B and the mixed Component C were sequentially sprayed into the powder mixing vessel in 6 separate batches each using an atomization device, according to their weight percentages. During the spraying process, intermittent stirring was performed at 2500 rpm for 60 seconds each time, until all components were uniformly dispersed, while controlling the temperature of the raw material mixture during stirring not to exceed 40 C. [0049] (3) Secondary Pulverization: The thoroughly dispersed raw material mixture was pulverized using a high-speed pulverizer. Pulverization was performed twice until the mixture attained a powdered form. After each pulverization, the powder was sieved through a 100-mesh screen, resulting in the mixed sieved powder. [0050] (4) Standing: The mixed sieved powder was allowed to stand thoroughly under environmental conditions of 25-28 C. temperature and 40%-60% humidity, until the temperature and humidity of the powder stabilized. [0051] (5) Compaction: The mixed sieved powder, after standing, was loaded into a mold. The powder within the mold was compacted at a pressure of 75 kg/cm.sup.2. Compaction was performed 4 times, with a dwell time of (3) Seconds for each compression. After demolding, the products obtained for Examples 1-4 all exhibited the antibacterial and sun-protective powdered solid compact composition with decorative elements, as shown in FIG. 1, with a density ranging from 8.25 to 8.45 g/cm.sup.3.

Examples 5-8

[0052] The raw materials were formulated according to the following weight percentages:

TABLE-US-00002 component Name of Raw Material Example 5 Example 6 Example 7 Example 8 A Calcium Starch 7 10 17 3.53 Octenylsuccinate A Aluminum Starch 11 10 6 13 Octenylsuccinate A Mica 18 15 17.5 19 A White Clay 14 15.2 13 17.35 A Magnesium Stearate 17 17 15 18 A Silica 7 7 8.5 7 A Polyethylene 2 2.5 0.5 A Polyamide 2.1 2.5 4 0.5 A Titanium Oxide 5.87 5 7 8 A Zinc Oxide 1 2 A Sodium Sorbate 0.15 0.45 0.3 0.2 B Glyceryl Monostearate 1.5 1.1 2 1.25 B Polyether Siloxane 0.5 1.2 0.5 1.5 B Isocetyl Stearate 2 1.4 0.4 1.1 B Caprylyl Glycol 0.1 0.2 B Ethylhexyl Glycine 0.5 0.25 B 2-Ethylhexyl Palmitate 0.4 0.5 B Bis-diglyceryl 0.38 0.3 0.25 Polyacyladipate-2 C Salix Alba Bark Extract 4 3 2.3 3 C Ginger Extract - 5 4 2.5 3 Propylene Glycol Mixture C Calendula Officinalis 1 2.15 1 0.35 Flower Extract - Pentylene Glycol Mixture

[0053] The raw materials for Examples 5-8 above were grouped into A, B, and C components. The products for Examples 5-8 were prepared by processing components A, B, and C separately according to the following steps: [0054] (1) Pre-mixing: At ambient temperature, Component Acomprising all solid raw materials except the plant extract and the viscous fluid skin-feel modifierwas added to a powder mixing vessel according to its weight percentage. The mixture was stirred at 2500 rpm until uniformly dispersed, while controlling the temperature of the raw material mixture during stirring not to exceed 40 C. [0055] (2) Mixing: Ginger extract was pre-dispersed in propylene glycol at a 1:5 ratio, and calendula extract was pre-dispersed in pentylene glycol at a 1:4 ratio. Subsequently, the mixed Component B and the mixed Component C were sequentially sprayed into the powder mixing vessel in 6 separate batches each using an atomization device, according to their weight percentages. During the spraying process, intermittent stirring was performed at 2500 rpm for 60 seconds each time, until all components were uniformly dispersed, while controlling the temperature of the raw material mixture during stirring not to exceed 40 C. [0056] (3) Secondary Pulverization: The thoroughly dispersed raw material mixture was pulverized using a high-speed pulverizer. Pulverization was performed twice until the mixture attained a powdered form. After each pulverization, the powder was sieved through a 200-mesh screen, resulting in the mixed sieved powder. [0057] (4) Standing: The mixed sieved powder was allowed to stand thoroughly under environmental conditions of 25-28 C. temperature and 40%-60% humidity, until the temperature and humidity of the powder stabilized. [0058] (5) Compaction: The mixed sieved powder, after standing, was loaded into a mold. The powder within the mold was compacted at a pressure of 80 kg/cm.sup.2. Compaction was performed 4 times, with a dwell time of (3) Seconds for each compression. After demolding, the products obtained for Examples 1-4 all exhibited the antibacterial and sun-protective powdered solid compact composition with decorative elements, as shown in FIG. 1, with a density ranging from 8.5 to 8.75 g/cm.sup.3.

Product Form Evaluation

[0059] Examples 1-8 were all compacted using the same mold to achieve the form shown in FIG. 1. Structurally, the product overall presents the shape of a cat's head, featuring various decorative elements at multiple locations such as the left ear 1, right ear 2, bow 3, and whiskers 4. The specific parameters for each decorative part are as follows:

[0060] The heights of both the left ear 1 and the right ear 2 are 18.62 mm. The distance X from the base to the tip of the left ear 1 is 10 mm. The distance Y from the base to the tip of the right ear 2 is 6 mm. Thus, the ratio of the minimum dimension to the maximum dimension for the left ear 1 is approximately 1:1.86. The ratio for the right ear 2 is approximately 1:3.1.

[0061] The highest point of the bow center 31 has a height of 0.8 mm relative to the main body. The longest chord length R of the bow center 31 is 10 mm. Thus, the ratio of the minimum dimension to the maximum dimension for the bow center 31 is 1:12.5. The highest point of the bow side petal 32 has a height of 0.5 mm relative to the main body. The longest dimension Z of the bow side petal 32 is 15 mm. Thus, the ratio of the minimum dimension to the maximum dimension for the bow side petal 32 is 1:30.

[0062] The whiskers 4 have a depth of 0.(2) Mm relative to the main body. The length of the whiskers 4 is 4 mm. Thus, the ratio of the minimum dimension to the maximum dimension for the whiskers 4 is 1:20.

[0063] The products from Examples 1-8, manufactured using their respective processing methods, all successfully formed structures that were robust with clear, well-defined textures. These compositions exhibited high structural stability, allowing them to be held directly for application without chipping or breaking. Upon application to the skin, the powder layer imparted a dry, film-like, smooth tactile sensation. Furthermore, the products demonstrated both antibacterial and sun-protective effects. The structural stability and efficacy of the products were verified through the following tests and observations: hardness testing, application durability testing, dust impact testing, application effect testing, antibacterial efficacy testing, sun protection efficacy testing, and cross-sectional electron microscopy. The test results are summarized below:

Hardness Testing

[0064] This evaluation employed three testing methodshorizontal translation drop test, air column bag drop test, and push-pull gauge hardness testto determine whether the product hardness of Examples 1-8 met specifications.

[0065] Horizontal Translation Drop Test: Test samples from Examples 1-8 were placed on a shelf 100 cm high. They were pushed horizontally off the edge to fall freely onto the ground twice, simulating accidental drops during user handling. The structural stability of the products was observed. The test results indicated that only the product from Example 7 exhibited localized damage (to the tip of the left ear decorative element) after the second drop. The structures of all other products remained stable, resulting in a passing test outcome for them.

[0066] Air Column Bag Drop Test: A single product, housed within its packaging box containing a plastic blister tray insert, was wrapped in an air column cushioning bag. The tester threw the package a distance of 4-5 meters onto the ground, simulating extreme handling conditions during shipping. This was repeated consecutively five times. Testing confirmed that all products from Examples 1-8 maintained structural integrity.

[0067] Push-Pull Gauge Hardness Test: An HANDPI NK-500 dial push-pull gauge, fitted with a 1 cm.sup.2 flat test head, was used as the hardness testing apparatus. Hardness testing was performed on products from Examples 1-8 by pressing the flat test head against the test area until fracture occurred, with the recorded value noted. The test results are as follows:

TABLE-US-00003 Position Exam- Exam- Exam- Exam- Exam- Exam- Exam- Exam- Hardness ple 1 ple 2 ple 3 ple 4 ple 5 ple 6 ple 7 ple 8 Body Hardness 9.4 9.5 9.3 10.1 9.2 9.1 9.8 (kg/cm ) Left Ear Hardness 4.9 5.2 5.0 5.1 (kg/cm ) Right Ear Hardness 5.0 5.2 5.0 5.3 (kg/cm ) indicates data missing or illegible when filed

[0068] The test results demonstrate that the hardness values for Examples 1-8 are relatively similar and are sufficient to withstand commercial transportation and routine user handling.

Application Effect Testing

[0069] Products from Example 1, a commercially available dusting powder, and a commercially available solid powder compact were used as test subjects. Their performance during application was evaluated using two methods: application on natural skin and application on skin in a perspired state.

Application on Natural Skin Test

[0070] FIG. 2A shows the state after application of the Example 1 product onto naturally dry skin surface. FIG. 2B shows the state after application of the commercially available dusting powder onto naturally dry skin surface. FIG. 2C shows the state after application of the commercially available solid powder compact onto naturally dry skin surface.

[0071] Regarding Example 1 product, upon application to the skin surface, it formed a fine, thin powder layer. The thickness of the powder layer was uniform across different areas, and the overall colour consistency was strong.

[0072] Regarding commercially available dusting powder, upon application to the skin surface, it formed a relatively coarse, thin powder layer. A significant amount of loose powder was present on the skin, which could easily transfer to clothing and was inconvenient to manage during cleanup.

[0073] Regarding commercially available solid powder compact, upon application to the skin surface, it formed a fine, thin powder layer. However, the initial application area showed the presence of loose powder, requiring the user to perform a secondary application to achieve uniformity.

Application on Perspired Skin Test

[0074] FIG. 3A shows the state after application of the Example 1 product onto a skin surface that had been wiped dry but retained a sticky, damp feeling. FIG. 3B shows the state after application of the commercially available dusting powder onto the same type of skin surface. FIG. 3C shows the state after application of the commercially available solid powder compact onto the same type of skin surface.

[0075] Regarding the product in FIG. 3A, upon application to the skin surface, it formed a fine, thin powder layer. It effectively absorbed moisture from the skin surface and helped refine the appearance of pores. Users experienced a dry, film-like, smooth tactile sensation.

[0076] Regarding the product in FIG. 3B, upon application to the skin surface, obvious clumping and aggregation of the powder occurred in multiple areas, resulting in a coarse texture. Users needed to remove the aggregated powder clumps before attempting a secondary application. Additionally, users perceived a slight warming sensation and dryness during use.

[0077] Regarding the product in FIG. 3C, upon application to the skin surface, the powder layer appeared dissolved and indistinct, offering relatively weak moisture-absorbing performance.

Application Durability Test

[0078] The product from Example 2 was used as the test sample. It was applied to a paper substrate with each application stroke being approximately 10-15 cm in length. The relationship between the number of application strokes and the reduction in product thickness was observed. The test continued until the main body or decorative elements of the product exhibited structural failure. The test results are as follows:

TABLE-US-00004 Product Thickness Simulated Measured Application Powder Photo Number Thickness Cracking or Not FIG. 4A 0 18.62 MM Integrity without Cracking FIG. 4B 100 11.44 MM Integrity without Cracking FIG. 4C 150 8.39 MM Integrity without Cracking FIG. 4D 200 5.05 MM Integrity without Cracking FIG. 4E 220 4.98 MM Slightly Cracking FIG. 4F 250 4.04 MM Cracking into Two

[0079] The results indicate that the product can be applied by holding it directly, and it exhibits high durability during use.

Dust Impact Effect Test

[0080] A PC-3A laser inhalable dust continuous tester (manufactured by Qingdao Jingcheng Instrument Co., Ltd.) was used as the testing instrument. Measurements were taken of the initial ambient air, followed by the air during the use of a commercially available loose powder dusting powder, a commercially available solid powder compact (applied with a puff), and the products prepared according to Examples 1, 3, and 8. The test simulated natural application by a user. After 30 seconds of natural application, the changes in the concentrations of PM2.5 and PM10 in the air were measured within a test range 50 cm from the user. The test results are as follows:

TABLE-US-00005 Initial Commercial Commercial Test Environment Dusting Solid Powder Exam- Exam- Exam- Item State Powder Compact ple 1 ple 3 ple 8 pm2.5 0.009 0.026 0.020 0.010 0.010 0.010 (mg/m ) pm10 0.038 0.560 0.512 0.047 0.048 0.043 (mg/m ) indicates data missing or illegible when filed

[0081] The measurements demonstrate that compared to the other products, the use of Examples 1, 3, and 8 resulted in a significant reduction in the concentration of inhalable particles within the tested spatial range. Furthermore, the concentration of fine particulate matter within this range during use of these examples was lower. This effectively reduces the health risk associated with user inhalation of dust during product application.

Antibacterial Efficacy Test

[0082] The product prepared according to Example 4 was tested for its bactericidal effect using the Carrier Immersion Bactericidal Test method outlined in the Technical Standard for Disinfection. The test microorganisms selected were three common resident bacteria: Staphylococcus aureus, Pseudomonas aeruginosa, and Escherichia coli. The antibacterial efficacy of the product was determined, and the test results are as follows:

TABLE-US-00006 Positive Control Product Action Colony Count Bacterial Kill Kill Duration Test Bacteria (CPU/g) Colony Count Log Value Rate (%) Original Staphylococcus aureus 5.8 10 1.1 10 4.72 99.9981% Sample Pseudomonas aeruginosa 6.7 10 1.2 10.sup.4 4.75 99.9982% 2 mins Escherichia coli 7.3 10 1.1 10 4.82 99.9985% Original Staphylococcus aureus 5.8 10 9.9 10 4.77 99.9983% Sample Pseudomonas aeruginosa 6.7 10 1.1 10 4.78 99.9984% 5 mins Escherichia coli 7.3 10 1.1 10 4.82 99.9985% Original Staphylococcus aureus 5.8 10 7.5 10 4.89 99.9987% Sample Pseudomonas aeruginosa 6.7 10 8.0 10 4.92 99.9988% 10 mins Escherichia coli 7.3 10 9.4 10 4.89 99.9987% indicates data missing or illegible when filed

[0083] The test confirmed that the product exhibits strong bactericidal action against Staphylococcus aureus, Pseudomonas aeruginosa, and Escherichia coli, achieving a kill rate of over 99.99% for each.

Sun Protection Effect Test

[0084] The products prepared according to Examples 1, 3, 5, and 7 were tested using the Sun Protection Factor (SPF) Test Method specified in the Cosmetics Safety Technical Specifications. The test instrument used was a Sun Protection Factor Analyzer, model SPF-290AS. The test environment was maintained at 211 C. and 5010% relative humidity.

Test Procedure

[0085] (1) Secure 3M tape, artificial skin, or a PVC film onto the sample plate. [0086] (2) First, measure the baseline curve of the blank substrate. Then, apply the sample uniformly onto the 3M tape using dots. Using a finger covered with a latex glove, spread the sample gently and evenly over a 50 cm.sup.2 area of the 3M tape at an application density of (2) Mg/cm.sup.2. [0087] (3) Place the sample plate after application in a dark environment at a temperature of 202 C. and relative humidity of 505% to dry naturally for 20 minutes. [0088] (4) Turn on the instrument power and preheat for 30 minutes. Once confirmed to be operating normally, use the SPF-290AS analyzer to select 6 points on the 3M tape. Measure and plot the Monochromatic Protection Factor (MPF) curves for these 6 wavelengths. The accompanying software then performs calculation and analysis, outputting the SPF value and standard deviation for the single test, as well as the SPF value for each scanning point. The test results are as follows:

TABLE-US-00007 Adjacent SPF UVA PF Wavelength Sum Label Measured Measured Measured Protection Sample Value Value Value Value Rating Example 1 N/A 20 19.5 372.60 SPF15 PA+ Example 3 N/A 21 30.5 376.20 SPF15 PA++ Example 5 N/A 21 20 376.10 SPF15 PA++ Example 7 N/A 21 20 376.10 SPF15 PA++

[0089] The results above indicate that the products from Examples 1, 3, 5, and 7 all achieved a sun protection rating of SPF 15 PA+ or higher, capable of meeting users' daily sun protection needs.

Cross-Sectional Electron Microscopy Observation

[0090] The product from Example 1 was used as the sample. Observation of the internal morphology and structure was conducted using a Hitachi benchtop scanning electron microscope (TM4000PlusII) under the following conditions: acceleration voltage of 10 kV, signal mode BSE, working distance of 7.1 mm, and direct observation without gold sputtering. Micrographs were taken at magnifications of 200, 500, and 1000, as shown in FIGS. 5A, 5B, and 5C, respectively.

[0091] The electron micrographs reveal that the aluminum starch octenylsuccinate, the low-swelling particulate powder, and the non-expandable polymer powder are well dispersed. Furthermore, the aluminum starch octenylsuccinate and the low-swelling particulate powder exhibit different absorption capacities for the viscous fluid skin-feel modifier, leading to the formation of particulate structures of varying sizes. Under compression, some of these structures undergo deformation into irregular curved, concave-convex, flake-like, or three-dimensional polygonal forms. Microscopically, adjacent particulate structures demonstrate mutual interlocking and embedding. Macroscopically, this translates into a product with high overall structural stability. During application to the skin, these fine particulate structures form a delicate, thin powder layer. The aluminum starch octenylsuccinate and the low-swelling particulate powder further absorb moisture from the skin, drying the skin surface and providing a micro-moist tactile response.

[0092] Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention and are not intended to limit the scope of protection. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that modifications or equivalent replacements to the technical solutions of the present invention may be made without departing from the spirit and scope of the technical solutions of the present invention.