Solid block composition of antibacterial sunscreen powder having decorative components and method for producing the same

Abstract

A solid block composition of antibacterial sunscreen powder having decorative components, comprising raw materials in the following weight percentages: 15%-25% aluminum starch octenyl succinate and / or calcium starch octenyl succinate, 45%-65% carrier powder, 1%-10% UV inhibitor, 0.1%-0.5% antibacterial agent, 1%-5% non-expanding polymer powder, 5%-15% viscous fluid skin texture modifier, and 0.1%-7.5% plant extract, with each solid raw material having a particle size of 5-50 μm, and after thoroughly and uniformly mixing each raw material and compressing it, the density is 8-9 g / cm³. 3 By forming a powder solid block composition and employing a processing method involving pre-mixing, mixing, grinding, standing, and rational pressure pressing, energy consumption can be reduced, and safety risks caused by certain flammable materials in the production process can be effectively mitigated.

Description

[Technical Field]

[0001] The present invention relates to the field of antibacterial and antiperspirant cosmetics, and more specifically to a solid block composition of antibacterial sunscreen powder having decorative components and a method for producing the same. [Background technology]

[0002] During hot summer weather, the skin is exposed to high-temperature sunlight, making it prone to sweating and unpleasant odors, as well as symptoms such as heat rash and papules. Various types of personal care cosmetics on the market are known to offer varying degrees of effectiveness in suppressing sweat secretion, inhibiting the growth of resident bacteria, and resisting UV damage.

[0003] For example, commonly seen solid powder products can provide antiperspirant and antibacterial effects. These include body powders that are in a powdery state and are used by spraying the powder and applying it to the target area. However, dust tends to be easily stirred up during use, and users (especially infants and children) are prone to accidentally inhaling the dust, which poses a potential health risk. Therefore, competitors on the market have launched solid pressed powder products. By improving the product formulation, the powdered raw materials can be compressed into small disc-shaped or rounded rectangular forms. These can be applied to the skin using a puff or by direct application, forming a thin powdery layer on the skin and reducing dust dispersion.

[0004] In addition to the effects of usage, users have various considerations regarding the functionality of such products. One point of focus is the effect of preventing skin dryness and itching. For example, by adding antifungal drugs containing heterocyclic structures, such as azole compounds, to conventional products, it is possible to achieve good bactericidal and antibacterial effects, thereby alleviating skin hypersensitivity, eczema, etc. However, such antibacterial drugs have lethal carcinogenicity and mutagenic toxicity in animals, and after being absorbed through the epidermis of the skin, they enter the plasma or body fluids, which is detrimental to the user's health. Using natural and standard-compliant raw materials can more effectively ensure consumer benefits.

[0005] In other solid powder products, some products use only inorganic porous powders such as calcium carbonate, magnesium carbonate, magnesium sulfate, and magnesium silicate as the main powder material. When applied to the skin, such products excessively absorb moisture from the skin and release heat, causing adverse reactions such as dryness and itching. Currently, some products combine the objectives of antibacterial and antiperspirant functionality and already use aluminum starch octenyl succinate, which has a sweat and oil adsorption effect, instead of some inorganic porous powders. For example, in Chinese invention patent application CN115670972A, aluminum starch octenyl succinate is used as a material, which can reduce the feeling of excessive dryness during use. Furthermore, when processing up to the intermediate stage using this technical solution, there is an intermediate processing state in which a pressed powder is formed. However, if a method is adopted in which a large amount of high-concentration alcohol is added to it based on this technical solution and the alcohol is evaporated by high-temperature drying, the pressed powder structure formed in the intermediate processing state tends to form a porous and loose structure, and there is a certain lack of stability in the pressed powder structure. For this reason, this solution adopts a dispersed powder state as the final product form, and it is still difficult to avoid the undesirable effect of dust inhalation during use.

[0006] Another aspect of product functionality that attracts user attention is the strength of its sunscreen effect. The sunscreen effect of a product works by absorbing ultraviolet rays, and while some UV absorbers, such as octyl methoxycinnamate, are widely used in sunscreen cosmetics, they can cause adverse reactions such as redness, itching, and hypersensitivity in users with sensitive skin. This is because some UV absorbers may undergo chemical changes and generate heat when they act. Furthermore, when UV absorbers are added in excess, the amount of oil added also has to increase, which can result in stickiness and impair the user experience.

[0007] Furthermore, based on considerations for commercial dissemination, products can be combined with a specific, commercially significant IP image to dramatically establish emotional credibility and approval among consumers. Products with such strong identifiability are more likely to achieve commercial success compared to basic products. At the same time, owners of mature IP images, based on considerations for commercial maintenance, also have relatively strict standards for quality testing of products incorporating the IP image. Conventional solid pressed powder products are limited in their raw material selection, and after being manufactured into relatively stable and simple geometric shapes, they still suffer from insufficient mechanical strength. Solid pressed powders with simple patterns printed on the surface must be used with a puff, and cannot be applied directly to the skin by directly gripping the pressed powder. Furthermore, while other types of small, disc-shaped solid pressed powders can be applied to the skin surface by hand, their formulation is limited by the raw material composition. When creating decorative elements with surface patterns, letters, uneven shapes, corners, rounded edges, or bevels, these are prone to cracking and detachment at the connection points between the decorative elements and the main body. Therefore, from the perspective of image development and deployment, the aforementioned conventional products have relatively low commercial value. [Overview of the project] [Problems that the invention aims to solve]

[0008] The objective of the present invention is to provide a solid block composition of antibacterial sunscreen powder having good antibacterial and sunscreen effects, and in which the formed product form can be equipped with multiple stable decorative members, thereby allowing the product to express various non-uniform shapes, and having good structural stability during the process of direct handling and application to the skin, and having decorative members that significantly reduce safety risks due to the scattering of dust. [Means for solving the problem]

[0009] To achieve the above objectives, the present invention is implemented by employing the following technical means.

[0010] A solid block composition of antibacterial sunscreen powder having decorative components, comprising the following weight percentages of raw materials.

[0011] Aluminum starch octenyl succinate and / or calcium starch octenyl succinate 15%-25%, carrier powder 45%-65%, UV inhibitor 1%-10%, antibacterial agent 0.1%-0.5%, non-expanding polymer powder 1%-5%, viscous fluid texture modifier 5%-15%, plant extract 0.1%-7.5%.

[0012] The process involves first refining the solid raw material components in each of the above raw materials to a particle size of 5-50 μm, then thoroughly mixing each raw material at least sufficiently uniformly, and finally compressing it in a mold, resulting in a density of 8-9 g / cm³. 3 A powder solid block composition is formed, and this formulation is adopted, retaining a UV inhibitor, a viscous fluid skin texture modifier, and an antibacterial agent as active ingredients, ensuring that the user obtains the necessary antibacterial and sunscreen effects upon use, preferably with a density of 8.25 to 8.5 g / cm³. 3 This powder solid block composition forms a stable product structure, and at the same time, when the powder is applied to the skin, it allows for smoother spreading of the powder on the skin.

[0013] More preferably, the particle size of the solid raw material is 10 to 30 μm. When a solid raw material of this particle size is used, excessive aggregation between the solid raw material and the viscous fluid skin texture modifier can be prevented during the mixing process, which is advantageous for the dispersion of the raw material, and at the same time eliminates the rough feeling caused by particles being too large when the product is applied to the skin surface.

[0014] In selecting a viscous fluid texture modifier, it is specifically a material that has a certain viscosity and is adsorbed onto a carrier powder, such as aluminum starch octenyl succinate and / or calcium starch octenyl succinate. Specifically, a silicone conditioner such as polymethylsiloxane, polyethersiloxane, alkylsiloxane, polyalkylarylsiloxane, or polyethersiloxane copolymer is selected. Alternatively, ester oils such as monoglyceride ricinoleate, isobutyl palmitate, glyceryl monostearate, isocetyl alcohol stearate, tallow sulfate, caprylic triglyceride, capric triglyceride, ethylhexyl palmitate, glyceryl tri(2-ethylhexanoate), diisobutyl adipate, isopropyl palmitate, 2-ethylhexyl palmitate, cetyl 2-ethylhexanoate, or tocopherol acetate are selected. Alternatively, it may be an alcohol material such as propylene glycol, triethylene glycol, butanediol, pentanediol, caprylyl glycol, 3-[2-(ethylhexyl)oxy]-1,2-propylene glycol, stearyl alcohol, oleyl alcohol, or cetyl alcohol. Preferably, the total weight percentage is controlled to control the viscosity fluid texture modifier, with the composition being 1% to 2% silicone conditioner, 1% to 5% synthetic ester oil, and 1% to 11% alcohols. For users with varying skin sensitivities, a low-irritation viscous fluid skin texture modifier should be rationally selected. In view of this, and in order to maintain a good structural form in the resulting powder solid block composition formed by the adsorption of some components of the viscous fluid skin texture modifier onto aluminum starch octenyl succinate, calcium starch octenyl succinate, and carrier powder, the silicone conditioner may preferably be selected from a blend of one or more of polymethylsiloxane, polydimethylsiloxane, alkylmethylsiloxane, and polydimethylcyclosiloxane.The synthetic ester oil may be selected from a combination of one or more of the following: caprylic triglyceride, capric triglyceride, ethylhexyl palmitate, glyceryl tri(2-ethylhexanoate), diisobutyl adipate, isopropyl palmitate, cetyl 2-ethylhexanoate, bis-diglyceryl polyacyladipate-2, and tocopherol acetate. The alcohol may be selected from a combination of one or more of the following: propylene glycol, caprylyl glycol, butanediol, pentanediol, and 3-[2-(ethylhexyl)oxy]-1,2-propylene glycol, which provides appropriate fluidity and dispersibility to powder particles applied to the skin, thereby effectively improving the favorable skin lubrication and micro-moisture tactile response.

[0015] Furthermore, the UV-blocking agent comprises one or more of zinc oxide, cerium oxide, and titanium dioxide. By selecting such a UV-blocking agent, the amount added can be reasonably increased to 5% to 10% by total weight percentage. In contrast to using UV-blocking agents with certain skin irritation properties, such as avobenzone, octocrylene, oxybenzone, homosalate, ochizalate, and octyl methoxycinnamate, which are present in low proportions, the formulation of the present invention can use metal oxide-based UV-blocking agents with relatively high relative proportions as raw materials. By rationally using finely particulated metal oxide particles, the fine metal oxide particles react with viscous fluid skin texture modifiers and fatty acids in sebum to fix them, suppressing sebum diffusion. The powdery layer formed after application is advantageous for retention on the skin and provides a delicate touch.

[0016] The carrier powder may be any other suitable low-swelling particulate powder material, such as mica, kaolin, silica, white clay, bentonite, magnesium stearate, or magnesium aluminum silicate. Preferably, the carrier powder is manufactured by blending mica 15% to 20%, kaolin 10% to 15%, magnesium stearate 15% to 20%, and silica 5% to 10% by total weight. By rationally selecting the type and blending ratio of the carrier powder and blending it with aluminum starch octenyl succinate and / or calcium starch octenyl succinate, it is possible to adsorb some viscous fluid texture modifiers, form aggregated fine particles of a reasonable size in the step of uniformly mixing each raw material, and provide the final product with a tactile response that balances skin lubrication and slight moisture, while avoiding the occurrence of a dry or heavy sticky feeling of the powder.

[0017] When a non-expanding polymer powder is uniformly mixed with a carrier powder, aluminum starch octenyl succinate and / or calcium starch octenyl succinate, and the above materials are mixed and dispersed with a viscous fluid skin texture modifier to form a powder material, each raw material has a different adsorption effect on the viscous fluid skin texture modifier, can form a stable structure when compressed, and when applied, the powder components can smoothly form a thin layer on the skin and spread. Preferably, the non-expanding polymer powder is a mixture of one or more of polyethylene powder, polytetrafluoroethylene powder, polyamide powder, and PMMA powder.

[0018] Furthermore, the aforementioned plant extract is a combination of one or more of the following: aloe extract, calendula extract, Indian bamboo extract, Sophora flavescens extract, Salvia miltiorrhiza extract powder, ginger extract, and white willow bark extract.

[0019] The rational addition of plant extracts is important. When relatively low concentrations or weak antibacterial agents are used, it is difficult to achieve a relatively ideal antimicrobial kinetic effect against various types of commensal bacteria. However, when plant extracts with bactericidal and anti-inflammatory properties are rationally added to form a combination with antibacterial agents, a relatively strong antibacterial effect can be achieved. Furthermore, the inventors have discovered that in addition to antibacterial functional effects, plant extracts can also provide certain anti-inflammatory, bactericidal, and anti-itch effects. In the application of the present invention as a body sweat-absorbing antibacterial agent, the product comes into contact with the hands, feet, neck, or other body parts, especially wrinkled skin, and can effectively reduce the occurrence of adverse symptoms such as heat rash and papules.

[0020] In combination with the solid block composition of antibacterial sunscreen powder manufactured according to the present invention, the decorative component parts have a minimum length of 0.1 mm or more, a maximum length of 25 mm or less, and the ratio of the minimum length to the maximum length of the parts is preferably in the range of 1:1 to 40. The overall volume is easy to grasp by hand, easy for the user to grasp, and easy to apply to the skin surface. By having such a rational decorative component, the manufactured product can form multiple different animals, overall trademark shapes, or patterns with complex and highly detailed surface textures, and the product manufactured according to the present invention has relatively high commercial value.

[0021] The present invention further discloses a method for producing a solid block composition of antibacterial sunscreen powder having decorative members, which is produced by the following steps.

[0022] (1) Pre-mixing: At room temperature, place each solid raw material, excluding the plant extract and viscous fluid texture modifier, into a powder-dusting stirring kettle in weight percentage, and stir at 2000-2500 rpm until uniformly dispersed, controlling the temperature of the raw material mixture during the stirring process so as not to exceed 40°C.

[0023] (2) Mixing: The plant extract is preliminarily dispersed in the raw materials of the viscous fluid skin feel regulator, and then injected into the powder punching and stirring kettle by an atomizing device. During the injection process, at the same time, it is intermittently stirred multiple times at 2000 - 2500 rpm until each component is uniformly dispersed, and the temperature of the raw material mixture during the stirring process is controlled not to exceed 40°C.

[0024] (3) Secondary grinding: The raw material mixture after sufficient dispersion is ground by a high-speed grinder to present a powder, and the mixed powder is sieved through a sieve of 100 - 200 mesh.

[0025] (4) Standing: Under the environmental conditions of a temperature of 25 - 28°C and a humidity of 40% - 60%, the mixed sieved powder is sufficiently stood until the temperature and humidity of the mixed sieved powder are stable.

[0026] (5) Pressing: The mixed sieved powder after standing is placed in a mold, and the mixed sieved powder in the mold is pressed to form the solid block composition of the powder with a density of 8 - 9 g / cm 3 as described above.

[0027] The present invention does not adopt the method of treating products at high temperature for the conventional technical solutions, and does not require the use of flammable alcohol as a medium, which can eliminate unnecessary safety risks in the processing process. Moreover, the solid block composition of the formed product powder is different from the porous and loose structure formed by inducing the volatilization of alcohol at high temperature. The formed compression structure has good structural stability and further increases the structural stability and production yield of the product. Therefore, in the stirring process of steps (1) - (2), the temperature of the raw material mixture is controlled not to exceed 40°C to prevent the formation of a block between aluminum octenyl succinate / calcium and other raw materials due to too high temperature, thereby making the mixing effect of each component more uniform. Also, 70 - 80 kg / cm 2This processing method, which involves intermittently pressing the mixed sieved powder multiple times under pressure, ensures that the pressurized powder solid block composition is sufficiently evacuated from the mold. This is effective in making the density of each part of the powder solid block composition uniform, thereby reducing defects that could result in voids or cracks in the product.

[0028] The present invention has at least the following technical effects.

[0029] The powder solid block composition of the present invention can form a delicate powdery layer on the skin after a thin layer is applied, effectively absorbing moisture from the skin surface, constricting pores, and giving the skin a smooth, dry, film-like feel. It can be applied to the skin by directly gripping it, the solid structure of the powder remains stable during use, it can withstand more than 200 applications and wipes, and the concentration of inhalable powder dispersed into the air during use is significantly reduced, thereby effectively reducing the health risk caused by accidental inhalation of the powder.

[0030] This invention adds plant extracts, UV protection agents, and skin texture modifiers as antibacterial and sunscreen ingredients, effectively suppressing the persistence of resident bacteria on the applied surface after application, reducing unpleasant odors caused by the decomposition of sweat and sebum by resident bacteria, and achieving a sunscreen effect level of SPF15 PA+ or higher.

[0031] This invention allows for the formation of a solid form with numerous decorative elements by compression, offering the potential to develop multiple types of product appearances, and possessing stable form, good portability, and durability. [Brief explanation of the drawing]

[0032] [Figure 1] This is a schematic diagram of a certain product development model of the present invention. [Figure 2] This is a schematic diagram comparing the application effects of commercially available body powder and commercially available solid pressed powder according to the present invention. [Figure 3]This is a schematic diagram comparing the application effects of commercially available body powder and commercially available solid pressed powder according to the present invention. [Figure 4] This is a schematic diagram illustrating the state after 0 to 250 applications of the present invention. [Figure 5] This is a configuration diagram of the cross-sectional electron microscope according to Example 1 of the present invention. [Modes for carrying out the invention]

[0033] The embodiments of the present invention will be described in detail below. However, the present invention is not limited to the following embodiments, and the ambient temperature environmental conditions in the manufacturing methods of Examples 1 to 8 below are all approximately 25°C and 50% humidity, and the equipment used is the same production and processing equipment.

[0034] Examples 1-4

[0035] The raw materials are arranged in the following weight percentages.

[0036] JPEG2026513852000002.jpg254107JPEG2026513852000003.jpg14128

[0037] The raw materials from Examples 1 to 4 above are grouped into A, B, and C, and the products of Examples 1 to 4 are manufactured by processing components A, B, and C according to the following steps using the method described below.

[0038] (1) Pre-mixing: At room temperature, each solid raw material except for component A, i.e., the plant extract and the viscosity fluid texture modifier, is placed in a powder-dusting stirring vessel in weight percentage and stirred at 2000 rpm until uniformly dispersed, while controlling the temperature of the raw material mixture during the stirring process so as not to exceed 40°C.

[0039] (2) Mixing: The corresponding plant extracts are pre-dispersed in butanediol in a 1:5 ratio. Then, the raw materials for component B and component C after mixing are further injected into the powder stirring kettle in six separate injections using an atomizer, in order of weight percentage. Simultaneously, the mixture is stirred intermittently at 2500 rpm for 60 seconds each time until each component is uniformly dispersed, and the temperature of the raw material mixture during the stirring process is controlled so as not to exceed 40°C.

[0040] (3) Secondary grinding: The raw material mixture, after being sufficiently dispersed, is ground using a high-speed grinder, and the grinding is carried out twice until the raw material mixture becomes a powder, and after each grinding, it is sieved with a 100-mesh sieve to obtain mixed sieved powder.

[0041] (4) Standing: Allow the mixed sieved powder to stand for a sufficient amount of time in an environment with a temperature of 25-28°C and a humidity of 40-60% until the temperature and humidity of the mixed sieved powder stabilize.

[0042] (5) Pressing: Place the mixed sieved powder after standing onto the mold, and adjust the amount of mixed sieved powder inside the mold to 75 kg / cm³. 2 The product was pressed four times with the specified pressure, holding the pressure for 3 seconds after each press. After demolding, the products manufactured in Examples 1-4 all had a density of 8.25-8.45 g / cm³ as shown in Figure 1. 3 A solid block composition of antibacterial sunscreen powder having a decorative component can be presented.

[0043] Examples 5-8

[0044] The raw materials are arranged in the following weight percentages.

[0045] JPEG2026513852000004.jpg239110

[0046] The raw materials from Examples 5 to 8 above are grouped into A, B, and C, and components A, B, and C are processed according to the following steps to produce the products of Examples 5 to 8.

[0047] (1) Pre-mixing: At room temperature, each solid raw material except for component A, i.e., the plant extract and the viscosity fluid texture modifier, is placed in a powder-dusting stirring vessel in weight percentage and stirred at 2500 rpm until uniformly dispersed, while controlling the temperature of the raw material mixture during the stirring process so as not to exceed 40°C.

[0048] (2) Mixing: Ginger extract is pre-dispersed in propylene glycol in a 1:5 ratio, and calendula flower extract is pre-dispersed in pentanediol in a 1:4 ratio. Then, the raw materials for component B and component C after mixing are further injected into the powder stirring kettle in six separate injections using an atomizer, in order of weight percentage. During the injection process, the mixture is simultaneously and intermittently stirred at 2500 rpm for 60 seconds each time until each component is uniformly dispersed, and the temperature of the raw material mixture during the stirring process is controlled so as not to exceed 40°C.

[0049] (3) Secondary grinding: The raw material mixture, after being sufficiently dispersed, is ground using a high-speed grinder, and the grinding is carried out twice until the raw material mixture becomes a powder, and after each grinding, it is sieved with a 200-mesh sieve to obtain mixed sieved powder.

[0050] (4) Standing: Allow the mixed sieved powder to stand for a sufficient amount of time in an environment with a temperature of 25-28°C and a humidity of 40-60% until the temperature and humidity of the mixed sieved powder stabilize.

[0051] (5) Pressing: Place the mixed sieved powder after standing onto the mold, and adjust the amount of mixed sieved powder inside the mold to 80 kg / cm³. 2 The product was pressed four times with the specified pressure, holding the pressure for 3 seconds after each press. After demolding, the products manufactured in Examples 1-4 all had a density of 8.5-8.75 g / cm³ as shown in Figure 1. 3 A solid block composition of antibacterial sunscreen powder having a decorative component can be presented.

[0052] Product design evaluation

[0053] Examples 1 to 8 all use the same mold to press the shape shown in Figure 1. In terms of product structure, the overall shape is that of a cat's head, with different decorative members at multiple positions such as the left ear 1, right ear 2, flower knot 3, and whiskers 4. The specific parameters of each decorative part are as follows.

[0054] The height of both left ear 1 and right ear 2 is 18.62 mm. The distance X from the base to the tip of left ear 1 is 10 mm, and the distance Y from the base to the tip of right ear 2 is 6 mm. Therefore, the range of the ratio of the minimum to maximum length of the left ear 1 is approximately 1:1.86, and the range of the ratio of the minimum to maximum length of the right ear 2 is approximately 1:31.

[0055] The highest point of the flower knot center 31 is 0.8 mm relative to the height of the main body, and the length R of the longest chord is 10 mm, meaning the ratio range of the minimum length to the maximum length of the flower knot center 31 is 1:12.5. The highest point of the lateral petal portion 32 of the flower knot is 0.5 mm relative to the height of the main body, and the length Z of the longest point is 15 mm, meaning the ratio range of the minimum length to the maximum length of the lateral petal portion 32 of the flower knot is 1:30.

[0056] The depth of whisker 4 relative to the main body is 0.2 mm, and its length is 4 mm; therefore, the ratio of the minimum length to the maximum length of whisker 4 is 1:20.

[0057] The products of Examples 1 to 8, after being manufactured using the corresponding processing methods, all exhibit a stable structure, a clear texture, and a stable structure that allows for direct gripping and application without crumbling. Simultaneously, after application to the skin, the powdery layer provides a smooth, film-like feel and possesses antibacterial and sunscreen effects. The structural stability and effectiveness of the products were verified through multiple tests, including hardness tests, coating durability tests, dust effect tests, coating effect tests, antibacterial effect tests, and sunscreen effect tests, as well as cross-sectional electron microscopy observations. The test results are as follows.

[0058] Hardness test

[0059] This test uses three test methods: translational drop test, air column bag discard test, and hardness test of the test pressure gauge, to test whether the product hardness of the products in Examples 1 to 8 meets the specifications.

[0060] Translational drop test: The test samples in Examples 1 to 8 are placed at a height of a shelf plate 100 cm away from the ground, and the product is flat-pressed to the edge of the shelf plate and freely dropped onto the ground twice, simulating the situation where the user accidentally drops it, observing whether the product structure is stable. According to the test results, only the product in Example 7 has local defects in the decorative member (the tip part of the left ear) after the second drop, and the remaining product structures are still stable, and all the test results are qualified.

[0061] Air column discard test: One product is placed in the product packaging box, the product packaging box has a plastic inner shelf of blister film, the product packaging box is wrapped in an air column bag, and the tester throws it onto the ground 4 to 5 meters away, simulating the conditions where the product is mailed and extremely handled, throwing it continuously 5 times. According to the test, all of Examples 1 to 8 can maintain the integrity of the product structure.

[0062] Hardness test of the test pressure gauge: Use a HANDPI NK~500 dial type push-pull gauge and mount a 1 cm 2 plane test head, and perform a hardness test on the products in Examples 1 to 8 with a product hardness test device. Press the test site with the plane test head press and record the value until the site is crushed. The test results are as follows.

[0063] JPEG2026513852000005.jpg46140

[0064] According to the test results, it was found that the hardnesses of Examples 1 to 8 are all relatively approximate and can meet commercial transportation and daily use by users.

[0065] Coating effect test

[0066] The product from Example 1, along with commercially available body powder and commercially available solid pressed powder, were used as test products. The performance of the products when applied was tested using two test methods: natural skin application and application under sweaty conditions.

[0067] Natural skin application test:

[0068] Figure 2A shows the product of Example 1, Figure 2B shows a commercially available body powder product, and Figure 2C shows the state when a commercially available solid pressed powder product is applied to an air-dried skin surface.

[0069] When the product of Example 1 is applied to the skin surface, a delicate, thin powdery layer can be formed, and at the same time, the thickness of the powdery layer is uniform in each area, resulting in strong color consistency across all areas.

[0070] When commercially available body powder products are applied to the skin surface, a relatively coarse, thin layer of powder can form, and a relatively large amount of loose powder remains on the skin. This loose powder is prone to staining clothing during cleaning and is difficult to remove.

[0071] Commercially available solid pressed powder products can be applied to the skin surface to form a delicate, thin layer of powder. However, the initial application area may have loose powder particles, requiring the user to apply a second layer to ensure uniformity.

[0072] Sweat condition application test:

[0073] Figure 3A shows the product from Example 1, Figure 3B shows a commercially available body powder product, and Figure 3C shows a commercially available solid pressed powder product after applying them to a sticky, damp skin surface after wiping away sweat.

[0074] When the product shown in Figure 3A is applied to the skin surface, it can form a delicate, thin powdery layer that effectively absorbs moisture from the skin surface, tightens pores, and allows the user to experience a smooth, film-like feel on the skin.

[0075] When the product shown in Figure 3B was applied to the skin surface, significant powder aggregation and blockage occurred in multiple locations, resulting in a rough texture. The user cleaned the aggregated powder blocks and then applied a second coat, and also experienced slight warming and dryness during use.

[0076] When the product shown in Figure 3C is applied to the skin surface, the powdery layer dissolves and disappears, making the powdery layer less noticeable and its moisture absorption performance relatively weaker.

[0077] Coating durability test

[0078] The product from Example 2 was used as a test sample. It was applied to paper, with each application length being approximately 10-15 cm. The change in the number of applications and the thickness of the product was observed, and the process was stopped until structural fracture of the main body / decorative material occurred in the product. The test results are as follows.

[0079] JPEG2026513852000006.jpg44140

[0080] The results showed that the product can be applied by the user while being held directly, and that it has high durability during use.

[0081] Dust effect test

[0082] Using the PC-3A laser dust inhalation continuous testing machine from Qingdao Jingcheng Instruments & Instruments Co., Ltd. as the testing machine, tests were conducted using commercially available general powder body powder, commercially available solid pressed powder (puff application form), and the products manufactured in Examples 1, 3, and 8, against the initial environmental conditions. Tests were conducted in which a user naturally applied the above multiple types of test products, and after 30 seconds of natural application, the changes in PM2.5 and PM10 concentrations in the air were tested at a test distance of 50 cm from the user. The test effects are as follows.

[0083] JPEG2026513852000007.jpg40154

[0084] Measurements revealed that, compared to other products, the concentration of inhalable particles in Examples 1, 3, and 8 within the spatial range of the test distance during use was significantly lower than that of commercially available products. Furthermore, the concentration of particulate matter within the spatial range of the test distance during use was lower, thereby effectively reducing the health risks associated with the inhalation of dust by the user.

[0085] Antibacterial efficacy test

[0086] Using the product manufactured in Example 4, the bactericidal effect of the product was tested in a carrier immersion sterilization test according to the "Disinfection Technology Standards." Three types of commensal bacteria were selected as experimental species: Staphylococcus aureus, Pseudomonas aeruginosa, and Escherichia coli. The antibacterial effect of the product was measured, and the test results are as follows.

[0087] JPEG2026513852000008.jpg72154

[0088] Verification has shown that the product has good bactericidal activity against three types of commensal bacteria: Staphylococcus aureus, Pseudomonas aeruginosa, and Escherichia coli, with a sterilization rate of over 99.99% for all of them.

[0089] Sunscreen effectiveness test

[0090] The products manufactured in Examples 1, 3, 5, and 7 were tested using the sunscreen SPF measurement test in accordance with the "Technical Standards for Cosmetic Safety." The test equipment was a sunscreen coefficient tester SPF-290AS, and the test environment was 21±1℃ with a humidity of 50±10%.

[0091] Examination steps:

[0092] (1) Secure 3M tape, artificial skin, or polyvinyl chloride film to the sample plate.

[0093] (2) First, measure the background curve of the blank film, then evenly dot the sample onto 3M tape, and apply it with a finger wearing a latex finger cot, at a concentration of 2 mg / cm². 2Use the amount of sample to measure 50cm 2 Apply a light, even coating to a 3M tape of the specified area.

[0094] (3) Place the coated sample plate in a dark environment at a temperature of (20±2)°C and a relative humidity of (50+5)% and allow it to air dry for 20 minutes.

[0095] (4) After turning on the power and preheating the device for 30 minutes to confirm that it is functioning correctly, six points are selected on the 3M tape using the SPF-290AS analyzer, and six optical wavelength MPF curves are measured and drawn. Simultaneous calculation and analysis are performed using the software installed on the device to obtain the SPF value and standard deviation of the primary test, as well as the sunscreen index SPF value for each scanning point. The test results are as follows.

[0096] JPEG2026513852000009.jpg48155

[0097] Based on the above results, the products manufactured in Examples 1, 3, 5, and 7 all achieved a sunscreen level of SPF15 PA+ or higher, meeting the user's daily sunscreen needs.

[0098] Cross-sectional electron microscope observation

[0099] Using the product from Example 1 as a sample, the topographic structure of the sample's interior was observed using a Hitachi desktop scanning electron microscope TM4000Plus II under the following test conditions: acceleration voltage of 10kV, signal mode BSE, distance between lens and object under test 7.1mm, and direct observation without gold jetting, at magnifications of x200, x500, and x1000. The electron microscope images are shown in Figures 5A to 5C.

[0100] As can be seen from the electron microscope images, the dispersibility of aluminum starch octenyl succinate, low-swelling particulate powder, and non-expanding polymer powder is good. Furthermore, aluminum starch octenyl succinate and low-swelling particulate powder have different absorption performances for viscous fluid skin texture modifiers, forming particle structures of different sizes. Some particle structures, when subjected to pressure, form irregular curved surfaces, uneven sheet-like or three-dimensional polygonal deformations, resulting in mutual interlocking and embedding between adjacent particle structures at a microscopic level, and macroscopically, the entire product exhibits relatively high structural stability. When applied to the skin, the fine particle structure forms a delicate, thin powdery layer on the skin, and the aluminum starch octenyl succinate and low-swelling particulate powder further absorb moisture from the skin, drying the skin surface and providing a slightly moist tactile response.

[0101] Finally, it should be noted that the above embodiments merely illustrate the technical solutions of the present invention and do not limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, as those skilled in the art will understand, the technical solutions of the present invention can be modified or replaced with equivalents without departing from the substance and scope of the technical solutions of the present invention.

Claims

1. A solid block composition of antibacterial sunscreen powder having decorative members, comprising raw materials in the following weight percentages: 15% to 25% aluminum starch octenyl succinate and / or calcium starch octenyl succinate, 45% to 65% carrier powder, 1% to 10% UV inhibitor, 0.1% to 0.5% antibacterial agent, 1% to 5% non-expanding polymer powder, 5% to 15% viscous fluid skin texture modifier, and 0.1% to 7.5% plant extract, wherein the carrier powder is a blend of one or more of mica, kaolin, silica, white clay, bentonite, magnesium stearate, and magnesium aluminum silicate, the non-expanding polymer powder is a blend of one or more of polyethylene powder, polytetrafluoroethylene powder, polyamide powder, and PMMA powder, the particle size of the solid raw materials in the raw materials is 5 to 50 μm, and after thoroughly and uniformly mixing the raw materials and compressing them, the density is 8 to 9 g / cm³. ３ A solid block composition of antibacterial sunscreen powder having a decorative member, characterized by forming a powder solid block composition which is a powder solid block composition.

2. The solid block composition of antibacterial sunscreen powder having a decorative member according to claim 1, characterized in that the particle size of the solid raw material is 10 to 30 μm.

3. The solid block composition of antibacterial sunscreen powder having a decorative member according to claim 1, characterized in that, by total weight percentage, the viscous fluid skin texture modifier consists of 1% to 2% silicone conditioner, 1% to 5% synthetic ester oil, and 1% to 11% alcohols.

4. The solid block composition of antibacterial sunscreen powder having a decorative member as described in 3, characterized in that the silicone conditioner is selected from a blend of one or more of polymethylsiloxane, polydimethylsiloxane, alkylmethylsiloxane, and polydimethylcyclosiloxane; the synthetic ester oil is selected from a blend of one or more of caprylic acid triglyceride, capric acid triglyceride, ethylhexyl palmitate, glyceryl tri(2-ethylhexanoate), diisobutyl adipate, isopropyl palmitate, cetyl 2-ethylhexanoate, and tocopherol acetate; and the alcohols are selected from a blend of one or more of propylene glycol, caprylyl glycol, butanediol, pentanediol, and 3-[2-(ethylhexyl)oxy]-1,2-propylene glycol.

5. The solid block composition of antibacterial sunscreen powder having a decorative member according to claim 1, characterized in that the ultraviolet protection agent is composed of one or more of zinc oxide, cerium oxide, and titanium dioxide in an amount of 5% to 10% by total weight.

6. The solid block composition of antibacterial sunscreen powder having a decorative member according to claim 1, characterized in that the carrier powder is manufactured by blending mica 15% to 20%, kaolin 10% to 15%, magnesium stearate 15% to 20%, and silica 5% to 10% by total weight percentage.

7. The solid block composition of antibacterial sunscreen powder having a decorative member according to claim 1, characterized in that the plant extract is a combination of one or more of the following: aloe extract, calendula extract, Indian bamboo extract, Sophora flavescens extract, Salvia miltiorrhiza extract powder, ginger extract, and White willow bark extract.

8. A solid block composition of antibacterial sunscreen powder having a decorative member according to any one of claims 1 to 7, characterized in that the minimum length of the decorative member portion is 0.1 mm or more, the maximum length of the portion portion is 25 mm or less, and the ratio of the minimum length of the portion portion to the maximum length of the portion portion is in the range of 1:1 to 40.

9. A method for producing a solid block composition of antibacterial sunscreen powder having a decorative member according to any one of claims 1 to 8, (1) Pre-mixing: At room temperature, each solid raw material, excluding plant extracts and viscous fluid texture modifiers, is placed in a powder-dusting stirring kettle by weight percentage and stirred at 2000-2500 rpm until uniformly dispersed, with the temperature of the raw material mixture controlled so as not to exceed 40°C during the stirring process. (2) Mixing: The plant extract is pre-dispersed in the raw materials of the viscous fluid texture modifier, and then sprayed into the powder stirring kettle using an atomizing device. During the spraying process, the mixture is simultaneously stirred intermittently at 2000 to 2500 rpm multiple times until each component is uniformly dispersed, and the temperature of the raw material mixture during the stirring process is controlled so as not to exceed 40°C. (3) Grinding: A step in which the raw material mixture, after being sufficiently dispersed, is ground into a powder using a high-speed grinder, and the mixed powder is passed through a sieve of 100 to 200 mesh, (4) Standing: A step in which the mixed sieved powder is left to stand for a sufficient amount of time under environmental conditions of temperature 25-28°C and humidity 40-60% until the temperature and humidity of the mixed sieved powder stabilizes, (5) Pressing: The mixed sieved powder after standing is placed on a mold, and the mixed sieved powder inside the mold is pressed until the density is 8-9 g / cm³. ３ The steps include forming the aforementioned powder solid block composition, A method for producing a solid block composition of antibacterial sunscreen powder having a decorative component, characterized by including

10. In step (5) above, 70-80 kg / cm ２ A method for producing a solid block composition of antibacterial sunscreen powder having a decorative member, characterized by applying intermittent multiple presses to the mixed sieve powder with the pressure described in 9.

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