Preparation process of sunscreen powder

Abstract

The invention provides a preparation process of sunscreen powder, belongs to the technical field of cosmetic preparation, and solves the technical problems that materials are easily attached to the inner wall of a dispersion container in the existing dispersion process, gas is easily entrained among the materials, and the dispersion effect is influenced. The invention relates to a preparation process of sunscreen powder, which comprises the following steps: adding nano TiO2 into deionized water, carrying out ultrasonic stirring, and adding stearic acid and aluminum chloride in the stirring process to obtain modified nano TiO2 dispersed slurry with good dispersity; the preparation method comprises the following steps: adding absolute ethyl alcohol into deionized water, fully and uniformly mixing, adding concentrated sulfuric acid to adjust the pH value to 5, adding into a mixture of a silane modifier and a silicone oil modifier, stirring for 20 minutes, and stopping stirring when the solution turns from a transparent phase to a blue phase so as to obtain hydrolysate; the device has the advantages that materials attached in the preparation tank are reduced, the dispersing and stirring effect and the production efficiency are improved, gas generated or entrained during material mixing in the dispersing and mixing process is exhausted, and the material dispersing and mixing uniformity degree is further improved.

Description

Technical Field

[0001] This invention belongs to the field of cosmetic preparation technology, and relates to a compound preparation device, particularly a sunscreen powder preparation process. Background Technology

[0002] Sunscreen powder compacts are solid cosmetic products in the form of cakes, made by mixing and pressing various powder raw materials (including pigments), binders (oil components), and sunscreen agents. They have the functions of covering, adhering, spreading, coloring, and modifying. Depending on the method of use, they are divided into dry, wet, and dual-use types.

[0003] A search revealed a Chinese patent document disclosing a sunscreen compound and a dual-use (wet and dry) sunscreen powder containing the compound [Application No.: 202210930207.3; Publication No.: CN 115252443 B]. This sunscreen compound and its dual-use (wet and dry) sunscreen powder belong to the field of micro / nano powder assembly and composite. The sunscreen compound, by weight, comprises 55-90 parts of component A, 1-5 parts of component B, and 10-40 parts of modified nano-TiO2. Component A is selected from at least one of synthetic fluorophlogopite, silica, muscovite, sericite, talc, alumina, and organosilicon powder, with a particle size ranging from 5-15 μm. Component B is selected from at least one of silane modifiers and silicone oil modifiers. Utilizing the sunscreen compound of this invention improves the dispersibility of inorganic sunscreen agents in the powder, allowing the sunscreen agent to exert its full effect.

[0004] Although this patent improves the dispersibility of inorganic sunscreen agents in powder compacts, allowing the sunscreen agents to exert a greater effect, the sunscreen complex using this invention requires a dispersion and homogenization device. Existing dispersion and homogenization devices tend to have materials adhering to the inner wall of the dispersion container during the dispersion process, affecting the dispersion and homogenization effect. Furthermore, due to the shearing and collision frequency between materials during the dispersion process, gas can easily be trapped between materials, affecting the dispersion effect and dispersion efficiency. Summary of the Invention

[0005] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a preparation process for sunscreen powder. The technical problem this invention aims to solve is: how to effectively reduce mixing dead zones, enabling materials to be more evenly distributed within the preparation tank, reducing the chance of materials adhering within the preparation tank, thereby improving dispersion and mixing effects and production efficiency, and expelling gases generated or entrained during the material mixing process to further improve the uniformity of material dispersion and mixing.

[0006] The objective of this invention can be achieved through the following technical solutions:

[0007] A process for preparing sunscreen powder includes the following steps:

[0008] S1. Add nano-TiO2 to deionized water and ultrasonically stir. Stearic acid and aluminum chloride are added during the stirring process to obtain a modified nano-TiO2 dispersion with good dispersibility.

[0009] S2. Add anhydrous ethanol to deionized water and mix thoroughly. Add concentrated sulfuric acid to adjust the pH value to 3-5. Add the mixture of silane modifier and silicone oil modifier and stir for 15-20 minutes. Stop stirring when the solution changes from transparent to blue. This is how to obtain the hydrolysate.

[0010] S3. Add at least one of the following to a high-speed mixer: zeolite imidazole ester skeleton, silica, synthetic fluorophlogopite, sericite, muscovite, alumina, talc, and organosilicon powder, and mix for 30-40 minutes to obtain mixed aggregate.

[0011] S4. Then, the mixed aggregate is fed into the mixer and mixed for 20-30 minutes. During the mixing process, the modified nano-TiO2 dispersion prepared in S1 is added. After thorough mixing, the hydrolysate prepared in S2 is added into the mixer and mixed for another 10-15 minutes to obtain a composite paste.

[0012] S5. Distribute the composite paste evenly and put it into a dryer for drying. After drying, composite blocks are obtained. Place the obtained composite blocks into a disperser for uniform dispersion to form composite particles.

[0013] S6. Place the dispersed composite particles in a grinder and grind them to obtain the desired composite powder.

[0014] In step S1, after adding aluminum chloride and stearic acid, stir for 20-25 minutes until there are no obvious floating solids on the surface of the slurry. If there are obvious floating solids, continue stirring and mixing. After stirring is completed, adjust the pH value to 4-5.

[0015] In step S6, the temperature of the dryer is set to 100-150°C, and the time is 7-9 hours.

[0016] The disperser used in step S5 is a sunscreen powder preparation device, including a first shell and a second shell. The first shell and the second shell are fixedly connected by multiple bolts. A preparation tank is installed inside the first shell. A first transmission bevel gear and a second transmission bevel gear are rotatably connected inside the first shell. A third transmission bevel gear is coaxially fixedly connected to the top surface of the preparation tank. Both the second and third transmission bevel gears mesh with the first transmission bevel gear. A dispersing rod is rotatably connected inside the preparation tank. The top end of the dispersing rod is pin-connected to the axis of the second transmission bevel gear. The rod is fixed with dispersing blades, and the preparation tank is equipped with a multi-angle dispersing component that cooperates with the dispersing rod. Both the first and second shells are equipped with stabilizing components to stabilize the rotation of the preparation tank. The bottom of the first shell is fixed with a drive motor, and the output shaft of the drive motor is coaxially fixed with a fixing sleeve. The fixing sleeve is inserted into the preparation tank, and the fixing sleeve is equipped with a limiting component to fix the connection state of the preparation tank. The top of the preparation tank is equipped with a feeding component, and the bottom of the preparation tank is equipped with a discharging component. The first shell is equipped with a striking component to vibrate the preparation tank.

[0017] The working principle of this invention is as follows: A drive motor rotates the preparation tank as a whole. This rotation, through the meshing of transmission bevel gear three and transmission bevel gear one, drives transmission bevel gear one to rotate. Transmission bevel gear one then drives transmission bevel gear two to rotate, which in turn drives the dispersing rod to rotate. The dispersing blades on the dispersing rod disperse and stir the composite materials within the preparation tank, improving their integration. Furthermore, the counter-rotation of the preparation tank and the dispersing rod enhances the dispersion power and effect on the composite materials. The multi-angle dispersing components generate strong turbulence during the stirring and dispersion process, thereby improving the uniformity of dispersion and mixing. The materials undergo omnidirectional, multi-angle mixing within the mixing drum, effectively reducing dead zones in the mixing process and ensuring the materials are thoroughly mixed within the preparation tank. The material is more evenly distributed inside the tank, reducing the chance of material adhering to the tank, thereby improving the dispersion and mixing effect and production efficiency. The stabilizing component improves the stability of the tank during rotation, stabilizes the rotation state of the tank, and improves structural strength to prevent excessive rotational force from causing the tank to detach. The limiting component enables quick and easy fixed connection between the tank and the drive motor, and facilitates disassembly of the tank, improving the efficiency of inspection and maintenance. The feeding component controls the entry of the required materials into the tank, and the discharging component controls the discharge of the mixed compound, thereby improving overall operability and overall preparation efficiency. The tapping component discharges the gas generated or carried during the material mixing process, further improving the uniformity of material dispersion and mixing.

[0018] Both the first and second housings have a pair of combined toothed rails fixed inside. The two pairs of toothed rails are connected to form a pair of toothed rings, and each toothed ring is connected to a multi-angle dispersion component. The multi-angle dispersion component includes a connecting frame fixedly connected to the dispersion tank, a pair of transmission bevel gears four rotatably connected to the connecting frame, and a transmission bevel gear five rotatably connected to the dispersion tank. Both transmission bevel gears four mesh with their corresponding transmission bevel gears five. A pair of dispersion turbines are rotatably connected inside the dispersion tank, and both dispersion turbines are coaxially fixedly connected to their corresponding transmission bevel gears five. Both transmission bevel gears four are coaxially fixedly connected to transmission gears, and both transmission gears mesh with their corresponding toothed rings.

[0019] Using the above structure, the preparation tank can be rotated as a whole, causing the two transmission gears to rotate through meshing with the gear ring. After the two transmission gears rotate, they will drive the corresponding transmission bevel gear four to rotate. After the two transmission bevel gears four rotate, they will drive the corresponding transmission bevel gear five to rotate. After the transmission bevel gear five rotates, it will drive the corresponding dispersion turbine to rotate, thus achieving a multi-angle dispersion and mixing effect.

[0020] The stabilizing component includes a pair of sliding arms slidably connected within the connecting frame and a meshing gear 1 rotatably connected within the connecting frame. Both sides of the meshing gear 1 are coaxially fixedly connected to transmission screws, and both transmission screws are threadedly connected to the corresponding sliding arms. Both housing 1 and housing 2 are fixedly fitted with mutually mating limit rails, and both sliding arms are slidably connected to the limit rails. A servo motor 1 is fixedly installed within the connecting frame, and the output shaft of the servo motor 1 is coaxially fixedly connected to a meshing gear 2. A toothed belt is connected to the meshing gear 2 and the meshing gear 1.

[0021] With the above structure, the servo motor can drive the meshing gear 2 to rotate, and the meshing gear 2 can then drive the meshing gear 1 to rotate via a toothed belt. After the meshing gear 1 rotates, it will drive the two transmission screws to rotate. After the two transmission screws rotate, they will drive the two sliding arms to move in opposite directions or in opposite directions through the threaded connection with the corresponding sliding arms, so as to realize the quick sliding docking of the two sliding arms with the limit slide rail.

[0022] The limiting assembly includes a limiting cylinder fixed on a fixed sleeve and a limiting rod slidably connected inside the limiting cylinder. The bottom end of the preparation tank has a snap-fit ​​hole, and the limiting rod has an adjusting threaded groove. A transmission bevel gear six is ​​rotatably connected inside the limiting cylinder. An adjusting screw is coaxially fixedly connected to the transmission bevel gear six. The adjusting screw is threadedly connected to the adjusting threaded groove. A transmission bevel gear seven is rotatably connected inside the limiting cylinder. The transmission bevel gear seven meshes with the transmission bevel gear six. An adjusting wheel is provided outside the limiting cylinder. The adjusting wheel is coaxially fixedly connected to the transmission bevel gear seven. One end of the limiting rod is snapped into the snap-fit ​​hole.

[0023] With the above structure, the transmission bevel gear seven can be rotated by the adjusting wheel. After the transmission bevel gear seven rotates, it will drive the transmission bevel gear six to rotate. After the transmission bevel gear six rotates, it will drive the adjusting screw to rotate. The adjusting screw is then connected to the adjusting thread groove by a thread, pushing the limit rod to move as a whole. Then, it moves to the insertion hole through the limit rod to engage with the insertion hole, realizing a quick fixed connection between the preparation tank and the drive motor. It also facilitates the disassembly of the preparation tank and improves the efficiency of inspection and maintenance.

[0024] The feeding assembly includes a feeding rack fixed on the preparation tank, a feeding port opened inside the feeding rack, a feeding hopper fixed on the feeding port, and a conveying channel opened inside the feeding rack. A conveying screw is rotatably connected inside the conveying channel, and a servo motor is fixed inside the feeding rack. A meshing gear three is coaxially fixedly connected to the output shaft of the servo motor one, and a meshing gear four is rotatably connected inside the feeding rack. The meshing gear four is coaxially fixedly connected to the conveying screw, and the meshing gear three meshes with the meshing gear four. The bottom end of the feeding port is connected to the conveying channel, and one end of the conveying channel is connected to the preparation tank. An electric brake is fixed to one end of the conveying channel.

[0025] Using the above structure, the mixed raw materials can be poured into the feed hopper and flow into the conveying channel. At this time, servo motor one is started, which drives meshing gear three to rotate. After meshing gear three rotates, it drives meshing gear four to rotate. After meshing gear four rotates, it drives the conveying screw to rotate. After the conveying screw rotates, it will transport the mixed raw materials into the preparation tank.

[0026] The discharge assembly is a discharge valve fixed on the preparation tank. The input end of the discharge valve is connected to the preparation tank. A conveying assembly is installed inside the housing, and the output end of the discharge valve is connected to the conveying assembly.

[0027] With the above structure, the discharge of the compound can be controlled by the discharge valve, and the compound can be received by the conveying component and transported and stored.

[0028] The conveying assembly includes a movable slot opened within a housing, a receiving hopper slidably connected within the movable slot, an adjusting screw rotatably connected within the housing, and a servo motor II fixed within the housing. The output shaft of the servo motor II is coaxially fixedly connected to the adjusting screw, and the adjusting screw is threadedly connected to the receiving hopper. A feeding pump is fixed within the housing, and the input end of the feeding pump is connected to the output end of the receiving hopper via a telescopic tube. The output end of the feeding pump is exposed outside the housing. The feed end of the feeding hopper is mated with the output end of the discharge valve.

[0029] With the above structure, the control screw can be rotated by the servo motor, and the rotation of the control screw will drive the receiving hopper to adjust its height. When the receiving hopper is raised, it will dock with the output end of the discharge valve, receive the compound and transport the compound through the conveying pump. When the receiving hopper is lowered, it will disengage from the discharge valve and will not affect the normal rotation of the preparation tank.

[0030] The striking assembly includes a striking frame fixedly connected within a housing, a guide groove within the striking frame, a first extrusion block slidably connected within the guide groove, a return spring fixed between the first extrusion block and the bottom of the guide groove, a striking block fixed to the bottom of the first extrusion block, the bottom end of the striking block engaging with the surface of the preparation tank, and a second extrusion block fixed to the shaft of a second transmission bevel gear. Both the first and second extrusion blocks are semi-circular plates, and their arc ends engage with each other.

[0031] With the above structure, when the second transmission bevel gear rotates, it will drive the second pushing block to rotate around the second transmission bevel gear. During the continuous reciprocating rotation, the second pushing block, through the squeezing cooperation with the first pushing block, repeatedly pushes and pushes the first pushing block up and down. The first pushing block, in turn, drives the striking block to continuously strike the surface of the preparation tank through this action, causing the entire preparation tank to produce slight vibrations, which helps to discharge the gas entrained in the internal raw materials.

[0032] An exposed opening is provided on the frame, and a cover is hinged to the exposed opening. A handle is fixed to the cover.

[0033] With the above structure, the exposed opening allows personnel to easily pour the materials needed for preparation into the feed hopper, and the sealing cover reduces interference from the external environment.

[0034] The preparation tank is equipped with an exhaust valve, and multiple baffles are fixed inside the preparation tank.

[0035] With the above structure, the gas generated during the mixing and dispersion process can be discharged through the exhaust valve, and the intensity of turbulence can be increased through multiple baffles.

[0036] Compared with existing technologies, the preparation process of this sunscreen powder has the following advantages:

[0037] 1. The preparation tank is rotated as a whole by a drive motor. After the preparation tank rotates, the transmission bevel gear three meshes with the transmission bevel gear one, which in turn drives the transmission bevel gear two to rotate. The rotation of the transmission bevel gear two then drives the dispersing rod to rotate. The dispersing blades on the dispersing rod disperse and stir the composite material in the preparation tank, improving the degree of integration between them. Furthermore, the opposite rotation of the preparation tank and the dispersing rod improves the dispersion power and effect of the composite material.

[0038] 2. The multi-angle dispersion component can generate strong turbulence during the mixing and dispersion process, thereby improving the uniformity of dispersion and mixing. The material is subjected to all-round and multi-angle mixing in the mixing drum, which can effectively reduce the mixing dead corners, make the material more evenly distributed in the preparation tank, reduce the chance of material adhering in the preparation tank, and thus improve the dispersion and mixing effect and production efficiency.

[0039] 3. The limiting component improves the stability of the preparation tank during rotation, stabilizes the rotation state of the preparation tank, and improves the structural strength to prevent excessive rotational force from causing the preparation tank to detach.

[0040] 4. The feeding assembly controls the entry of the required materials into the preparation tank, and the discharging assembly controls the discharge of the mixed composite material into the preparation tank, thereby improving overall operability and overall preparation efficiency.

[0041] 5. By tapping the component, the gas generated or entrained during the material mixing process is discharged, further improving the uniformity of material dispersion and mixing.

[0042] 6. This invention improves the dispersibility of nano-TiO3. On the other hand, the composite material has the effects of sun protection, filling and improving skin feel, and effectively avoids the concept of nanomaterials. The sun protection performance is improved to a certain extent, the cost is significantly reduced, and the skin feel and spreadability are more excellent. Attached Figure Description

[0043] Figure 1 This is a comparison table of the sun protection performance test results of this invention.

[0044] Figure 2 This is a process flow diagram of the present invention.

[0045] Figure 3 This is a schematic diagram of the preparation equipment of the present invention.

[0046] Figure 4 This is a schematic diagram of the overall internal structure of the preparation equipment in this invention.

[0047] Figure 5 This is a schematic diagram of the internal structure of the preparation tank in this invention.

[0048] Figure 6 This is a schematic diagram of the stabilizing component in this invention.

[0049] Figure 7 This is a schematic diagram of the limiting component in this invention.

[0050] Figure 8 This is a schematic diagram of the striking component in this invention.

[0051] Figure 9 This is a schematic diagram of the feeding assembly in this invention.

[0052] Figure 10 This is a schematic diagram of the material discharge component in this invention.

[0053] In the diagram, 1. Shell frame one; 2. Shell frame two; 3. Preparation tank; 4. Transmission bevel gear one; 5. Transmission bevel gear two; 6. Transmission bevel gear three; 7. Dispersing rod; 8. Dispersing blade; 9. Drive motor; 10. Fixing sleeve; 11. Gear ring; 12. Connecting frame; 13. Transmission bevel gear four; 14. Transmission bevel gear five; 15. Dispersing turbine; 16. Transmission gear; 17. Sliding arm; 18. Meshing gear one; 19. Transmission screw; 20. Limiting slide rail; 21. Servo motor one; 22. Meshing gear two; 23. Toothed belt; 24. Limiting cylinder; 25. Limiting rod; 26. Insertion hole; 27. Adjusting threaded groove; 28. Transmission bevel gear six; 2 9. Control screw; 30. Transmission bevel gear seven; 31. Control wheel; 32. Feed rack; 33. Feed inlet; 34. Feed hopper; 35. Conveying channel; 36. Conveying screw; 37. Servo motor one; 38. Meshing gear three; 39. Meshing gear four; 40. Electric brake one; 41. Discharge valve; 42. Movable groove; 43. Receiving hopper; 44. Control screw; 45. Servo motor two; 46. Conveying pump; 47. Impact frame; 48. Guide chute; 49. Extrusion block one; 50. Return spring; 51. Impact block; 52. Push block two; 53. Exposed opening; 54. Cover; 55. Handle; 56. Air outlet valve; 57. Baffle. Detailed Implementation

[0054] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0055] Example 1

[0056] A process for preparing sunscreen powder includes the following steps:

[0057] S1. Add nano-TiO2 to deionized water and ultrasonically stir. Stearic acid and aluminum chloride are added during the stirring process to obtain a modified nano-TiO2 dispersion with good dispersibility.

[0058] S2. Add anhydrous ethanol to deionized water and mix thoroughly. Add concentrated sulfuric acid to adjust the pH value to 3. Add the mixture of silane modifier and silicone oil modifier and stir for 15 minutes. Stop stirring when the solution changes from transparent to blue. This is how to obtain the hydrolysate.

[0059] S3. Add at least one of the following to a high-speed mixer: zeolite imidazole ester skeleton, silica, synthetic fluorophlogopite, sericite, muscovite, alumina, talc, and organosilicon powder, and mix for 30 minutes to obtain mixed aggregate.

[0060] S4. Then, the mixed aggregate is fed into the mixer and mixed for 20 minutes. During the mixing process, the modified nano-TiO2 dispersion prepared in S1 is added. After thorough mixing, the hydrolysate prepared in S2 is added into the mixer and mixed for another 10 minutes to obtain a composite paste.

[0061] S5. Distribute the composite paste evenly and put it into a dryer for drying. After drying, composite blocks are obtained. Place the obtained composite blocks into a disperser for uniform dispersion to form composite particles.

[0062] S6. Place the dispersed composite particles in a grinder and grind them to obtain the desired composite powder.

[0063] In step S1, after adding aluminum chloride and stearic acid, stir for 20 minutes until there are no obvious floating solids on the surface of the slurry. If there are obvious floating solids, continue stirring and mixing. After stirring is completed, adjust the pH value to 4.

[0064] In step S6, the dryer temperature is set to 100°C and the time is 7 hours.

[0065] The equipment used in this embodiment are all molding equipment that can be purchased on the existing market.

[0066] Example 2

[0067] A process for preparing sunscreen powder includes the following steps:

[0068] S1. Add nano-TiO2 to deionized water and ultrasonically stir. Stearic acid and aluminum chloride are added during the stirring process to obtain a modified nano-TiO2 dispersion with good dispersibility.

[0069] S2. Add anhydrous ethanol to deionized water and mix thoroughly. Add concentrated sulfuric acid to adjust the pH value to 3. Add the mixture of silane modifier and silicone oil modifier and stir for 15 minutes. Stop stirring when the solution changes from transparent to blue. This is how to obtain the hydrolysate.

[0070] S3. Add at least one of the following to a high-speed mixer: zeolite imidazole ester skeleton, silica, synthetic fluorophlogopite, sericite, muscovite, alumina, talc, and organosilicon powder, and mix for 30 minutes to obtain mixed aggregate.

[0071] S4. Then, the mixed aggregate is fed into the mixer and mixed for 20 minutes. During the mixing process, the modified nano-TiO2 dispersion prepared in S1 is added. After thorough mixing, the hydrolysate prepared in S2 is added into the mixer and mixed for another 10 minutes to obtain a composite paste.

[0072] S5. Distribute the composite paste evenly and put it into a dryer for drying. After drying, composite blocks are obtained. Place the obtained composite blocks into a disperser for uniform dispersion to form composite particles.

[0073] S6. Place the dispersed composite particles in a grinder and grind them to obtain the desired composite powder.

[0074] In step S1, after adding aluminum chloride and stearic acid, stir for 20 minutes until there are no obvious floating solids on the surface of the slurry. If there are obvious floating solids, continue stirring and mixing. After stirring is completed, adjust the pH value to 4.

[0075] In step S6, the dryer temperature is set to 100°C and the time is 7 hours.

[0076] The disperser used in step S5 is a sunscreen powder preparation device, including a frame 1 and a frame 2. Frame 1 and frame 2 are fixedly connected by multiple bolts. A preparation tank is installed inside frame 1. Drive bevel gear 1 and drive bevel gear 2 are rotatably connected inside frame 1. A drive bevel gear 3 is coaxially fixedly connected to the top surface of the preparation tank. Both drive bevel gear 2 and drive bevel gear 3 mesh with drive bevel gear 1. A dispersing rod is rotatably connected inside the preparation tank. The top end of the dispersing rod is pin-connected to the shaft of drive bevel gear 2. The preparation tank is equipped with a dispersing blade fixed on top, and a multi-angle dispersing component that cooperates with the dispersing rod is installed inside the preparation tank. Both the first and second shells are equipped with stabilizing components to stabilize the rotation of the preparation tank. A drive motor is fixed at the bottom of the first shell, and a fixing sleeve is coaxially fixed to the output shaft of the drive motor. The fixing sleeve is inserted into the preparation tank, and a limiting component is installed on the fixing sleeve to fix the connection state of the preparation tank. A feeding component is installed at the top of the preparation tank, and a discharging component is installed at the bottom of the preparation tank. A striking component is installed inside the first shell to vibrate the preparation tank.

[0077] The working principle of this invention is as follows: A drive motor rotates the preparation tank as a whole. This rotation, through the meshing of transmission bevel gear three and transmission bevel gear one, drives transmission bevel gear one to rotate. Transmission bevel gear one then drives transmission bevel gear two to rotate, which in turn drives the dispersing rod to rotate. The dispersing blades on the dispersing rod disperse and stir the composite materials within the preparation tank, improving their integration. Furthermore, the counter-rotation of the preparation tank and the dispersing rod enhances the dispersion power and effect on the composite materials. The multi-angle dispersing components generate strong turbulence during the stirring and dispersion process, thereby improving the uniformity of dispersion and mixing. The materials undergo omnidirectional, multi-angle mixing within the mixing drum, effectively reducing dead zones in the mixing process and ensuring the materials are thoroughly mixed within the preparation tank. The material is more evenly distributed inside the tank, reducing the chance of material adhering to the tank, thereby improving the dispersion and mixing effect and production efficiency. The stabilizing component improves the stability of the tank during rotation, stabilizes the rotation state of the tank, and improves structural strength to prevent excessive rotational force from causing the tank to detach. The limiting component enables quick and easy fixed connection between the tank and the drive motor, and facilitates disassembly of the tank, improving the efficiency of inspection and maintenance. The feeding component controls the entry of the required materials into the tank, and the discharging component controls the discharge of the mixed compound, thereby improving overall operability and overall preparation efficiency. The tapping component discharges the gas generated or carried during the material mixing process, further improving the uniformity of material dispersion and mixing.

[0078] Both shell frame one and shell frame two have a pair of combined toothed rails fixed inside. The two pairs of toothed rails are connected to form a pair of toothed rings, and each toothed ring is connected to a multi-angle dispersion component. The multi-angle dispersion component includes a connecting frame fixedly connected to the dispersion tank, a pair of transmission bevel gears four rotatably connected to the connecting frame, and a transmission bevel gear five rotatably connected to the dispersion tank. Both transmission bevel gears four mesh with their corresponding transmission bevel gears five. A pair of dispersion turbines are rotatably connected inside the dispersion tank, and both dispersion turbines are coaxially fixedly connected to their corresponding transmission bevel gears five. Both transmission bevel gears four are coaxially fixedly connected to transmission gears, and both transmission gears mesh with their corresponding toothed rings.

[0079] Using the above structure, the preparation tank can be rotated as a whole, causing the two transmission gears to rotate through meshing with the gear ring. After the two transmission gears rotate, they will drive the corresponding transmission bevel gear four to rotate. After the two transmission bevel gears four rotate, they will drive the corresponding transmission bevel gear five to rotate. After the transmission bevel gear five rotates, it will drive the corresponding dispersion turbine to rotate, thus achieving a multi-angle dispersion and mixing effect.

[0080] The stabilizing component includes a pair of sliding arms slidably connected within the connecting frame, and a meshing gear 1 rotatably connected within the connecting frame. Both sides of the meshing gear 1 are coaxially fixedly connected to transmission screws, and both transmission screws are threadedly connected to the corresponding sliding arms. Both housing 1 and housing 2 have mutually mating limit rails fixed inside, and both sliding arms are slidably connected to the limit rails. A servo motor 1 is fixed inside the connecting frame, and the output shaft of the servo motor 1 is coaxially fixedly connected to a meshing gear 2. A toothed belt is connected to the meshing gear 2 and the meshing gear 1.

[0081] With the above structure, the servo motor can drive the meshing gear 2 to rotate, and the meshing gear 2 can then drive the meshing gear 1 to rotate via a toothed belt. After the meshing gear 1 rotates, it will drive the two transmission screws to rotate. After the two transmission screws rotate, they will drive the two sliding arms to move in opposite directions or in opposite directions through the threaded connection with the corresponding sliding arms, so as to realize the quick sliding docking of the two sliding arms with the limit slide rail.

[0082] The limiting assembly includes a limiting cylinder fixed on a fixed sleeve and a limiting rod slidably connected inside the limiting cylinder. A snap-fit ​​hole is opened at the bottom of the preparation tank. An adjusting threaded groove is opened inside the limiting rod. A transmission bevel gear six is ​​rotatably connected inside the limiting cylinder. An adjusting screw is coaxially fixedly connected to the transmission bevel gear six. The adjusting screw is threadedly connected to the adjusting threaded groove. A transmission bevel gear seven is rotatably connected inside the limiting cylinder. The transmission bevel gear seven meshes with the transmission bevel gear six. An adjusting wheel is set outside the limiting cylinder. The adjusting wheel is coaxially fixedly connected to the transmission bevel gear seven. One end of the limiting rod is snapped into the snap-fit ​​hole.

[0083] With the above structure, the transmission bevel gear seven can be rotated by the adjusting wheel. After the transmission bevel gear seven rotates, it will drive the transmission bevel gear six to rotate. After the transmission bevel gear six rotates, it will drive the adjusting screw to rotate. The adjusting screw is then connected to the adjusting thread groove by a thread, pushing the limit rod to move as a whole. Then, it moves to the insertion hole through the limit rod to engage with the insertion hole, realizing a quick fixed connection between the preparation tank and the drive motor. It also facilitates the disassembly of the preparation tank and improves the efficiency of inspection and maintenance.

[0084] The feeding assembly includes a feeding rack fixed on the preparation tank, a feeding port opened in the feeding rack, a feeding hopper fixed on the feeding port, and a conveying channel opened in the feeding rack. A conveying screw is rotatably connected in the conveying channel, and a servo motor is fixed in the feeding rack. The output shaft of the servo motor is coaxially fixedly connected to a meshing gear three. A meshing gear four is rotatably connected in the feeding rack. The meshing gear four is coaxially fixedly connected to the conveying screw. The meshing gear three and the meshing gear four mesh. The bottom end of the feeding port is connected to the conveying channel, and one end of the conveying channel is connected to the preparation tank. An electric brake is fixed at one end of the conveying channel.

[0085] Using the above structure, the mixed raw materials can be poured into the feed hopper and flow into the conveying channel. At this time, servo motor one is started, which drives meshing gear three to rotate. After meshing gear three rotates, it drives meshing gear four to rotate. After meshing gear four rotates, it drives the conveying screw to rotate. After the conveying screw rotates, it will transport the mixed raw materials into the preparation tank.

[0086] The discharge assembly is a discharge valve fixed on the preparation tank. The input end of the discharge valve is connected to the preparation tank. A conveying assembly is installed inside the shell frame, and the output end of the discharge valve is connected to the conveying assembly.

[0087] With the above structure, the discharge of the compound can be controlled by the discharge valve, and the compound can be received by the conveying component and transported and stored.

[0088] The conveying assembly includes a movable slot within a housing, a receiving hopper slidably connected within the movable slot, a control screw rotatably connected within the housing, a servo motor II fixed within the housing, the output shaft of the servo motor II being coaxially fixedly connected to the control screw, the control screw being threadedly connected to the receiving hopper, a feed pump fixed within the housing, the input end of the feed pump being connected to the output end of the receiving hopper via a telescopic tube, and the output end of the feed pump being exposed outside the housing, and the feed end of the feed hopper being mated with the output end of the discharge valve.

[0089] With the above structure, the control screw can be rotated by the servo motor, and the rotation of the control screw will drive the receiving hopper to adjust its height. When the receiving hopper is raised, it will dock with the output end of the discharge valve, receive the compound and transport the compound through the conveying pump. When the receiving hopper is lowered, it will disengage from the discharge valve and will not affect the normal rotation of the preparation tank.

[0090] The striking assembly includes a striking frame fixedly connected within a housing, a guide groove within the striking frame, a first extrusion block slidably connected within the guide groove, a return spring fixed between the first extrusion block and the bottom of the guide groove, a striking block fixed to the bottom of the first extrusion block, the bottom end of the striking block engaging with the surface of the preparation tank, and a second extrusion block fixed to the shaft of a second transmission bevel gear. Both the first and second extrusion blocks are semi-circular plates, and their arc ends engage with each other.

[0091] With the above structure, when the second transmission bevel gear rotates, it will drive the second pushing block to rotate around the second transmission bevel gear. During the continuous reciprocating rotation, the second pushing block, through the squeezing cooperation with the first pushing block, repeatedly pushes and pushes the first pushing block up and down. The first pushing block, in turn, drives the striking block to continuously strike the surface of the preparation tank through this action, causing the entire preparation tank to produce slight vibrations, which helps to discharge the gas entrained in the internal raw materials.

[0092] An exposed opening is provided on the frame, and a cover is hinged to the exposed opening. A handle is fixed to the cover.

[0093] With the above structure, the exposed opening allows personnel to easily pour the materials needed for preparation into the feed hopper, and the sealing cover reduces interference from the external environment.

[0094] An exhaust valve is fixed on the preparation tank, and multiple baffles are fixed inside the preparation tank.

[0095] With the above structure, the gas generated during the mixing and dispersion process can be discharged through the exhaust valve, and the intensity of turbulence can be increased through multiple baffles.

[0096] Example 3

[0097] A process for preparing sunscreen powder includes the following steps:

[0098] S1. Add nano-TiO2 to deionized water and ultrasonically stir. Stearic acid and aluminum chloride are added during the stirring process to obtain a modified nano-TiO2 dispersion with good dispersibility.

[0099] S2. Add anhydrous ethanol to deionized water and mix thoroughly. Add concentrated sulfuric acid to adjust the pH value to 5. Add the mixture of silane modifier and silicone oil modifier and stir for 20 minutes. Stop stirring when the solution changes from transparent to blue. This is how to obtain the hydrolysate.

[0100] S3. Add at least one of the following to a high-speed mixer: zeolite imidazole ester skeleton, silica, synthetic fluorophlogopite, sericite, muscovite, alumina, talc, and organosilicon powder, and mix for 40 minutes to obtain mixed aggregate.

[0101] S4. Then, the mixed aggregate is fed into the mixer and mixed for 30 minutes. During the mixing process, the modified nano-TiO2 dispersion prepared in S1 is added. After thorough mixing, the hydrolysate prepared in S2 is added into the mixer and mixed for another 15 minutes to obtain a composite paste.

[0102] S5. Distribute the composite paste evenly and put it into a dryer for drying. After drying, composite blocks are obtained. Place the obtained composite blocks into a disperser for uniform dispersion to form composite particles.

[0103] S6. Place the dispersed composite particles in a grinder and grind them to obtain the desired composite powder.

[0104] In step S1, after adding aluminum chloride and stearic acid, stir for 25 minutes until there are no obvious floating solids on the surface of the slurry. If there are obvious floating solids, continue stirring and mixing. After stirring is completed, adjust the pH value to 5.

[0105] In step S6, the dryer temperature is set to 150°C and the time is 9 hours.

[0106] The equipment used in this embodiment is the same as that used in Embodiment 2, the difference being the different process conditions.

[0107] Example 4

[0108] A process for preparing sunscreen powder includes the following steps:

[0109] S1. Add nano-TiO2 to deionized water and ultrasonically stir. Stearic acid and aluminum chloride are added during the stirring process to obtain a modified nano-TiO2 dispersion with good dispersibility.

[0110] S2. Add anhydrous ethanol to deionized water and mix thoroughly. Add concentrated sulfuric acid to adjust the pH value to 5. Add the mixture of silane modifier and silicone oil modifier and stir for 20 minutes. Stop stirring when the solution changes from transparent to blue. This is how to obtain the hydrolysate.

[0111] S3. Add at least one of the following to a high-speed mixer: zeolite imidazole ester skeleton, silica, synthetic fluorophlogopite, sericite, muscovite, alumina, talc, and organosilicon powder, and mix for 40 minutes to obtain mixed aggregate.

[0112] S4. Then, the mixed aggregate is fed into the mixer and mixed for 30 minutes. During the mixing process, the modified nano-TiO2 dispersion prepared in S1 is added. After thorough mixing, the hydrolysate prepared in S2 is added into the mixer and mixed for another 15 minutes to obtain a composite paste.

[0113] S5. Distribute the composite paste evenly and put it into a dryer for drying. After drying, composite blocks are obtained. Place the obtained composite blocks into a disperser for uniform dispersion to form composite particles.

[0114] S6. Place the dispersed composite particles in a grinder and grind them to obtain the desired composite powder.

[0115] In step S1, after adding aluminum chloride and stearic acid, stir for 25 minutes until there are no obvious floating solids on the surface of the slurry. If there are obvious floating solids, continue stirring and mixing. After stirring is completed, adjust the pH value to 5.

[0116] In step S6, the dryer temperature is set to 150°C and the time is 9 hours.

[0117] The equipment used in this embodiment is the same as that used in Embodiment 2, the difference being the different process conditions.

[0118] Human skin feel test: The examples and existing products were randomly numbered, and 3 volunteers were selected to be tested separately. They used their index fingers to take an appropriate amount of sample powder and spread it 4cm above their wrists for a length of 7cm. The application feeling was evaluated. Easy application and smooth skin feel indicate good treatment effect. The test results are shown in Table 1.

[0119] Table 1: Skin Feel Record Sheet

[0120] sample Example 1 Example 2 Example 3 Example 4 Existing products Skin feel It's easy to apply evenly and forms a film quickly, but its adherence to the skin is slightly poor. Easy to apply evenly, and forms a film quickly. It is easy to apply evenly, forms a film quickly, has a light and thin texture, but its oil control effect is slightly poor. Easy to apply evenly, fast film formation, and lightweight texture. It feels sticky and makes makeup cake.

[0121] This application presents performance tests on the sunscreen powders provided in Examples 1-4 and existing products. The testing was conducted using an SPF meter, with 10 tests performed per test. For each test, the sunscreen powder or pressed powder was applied to a heat-sensitive plate and kept at a constant temperature of 40°C for 3 hours. The performance test results for the sunscreen powders provided in Examples 1-4 and existing products are shown in Table 2.

[0122] Table 2 Comparison of Sunscreen Performance Test Results:

[0123] Number of tests Example 1 Example 2 Example 3 Example 4 Existing products 1 41.24 47.64 45.51 45.62 32.55 2 40.31 46.72 43.32 43.88 34.73 3 42.47 47.13 44.14 46.13 30.85 4 41.2 45.97 45.76 45.68 26.74 5 39.68 46.22 43.93 45.73 31.46 6 43.44 46.37 42.88 46.35 27.74 7 42.52 47.56 44.54 44.98 25.47 8 39.98 47.42 43.26 44.37 32.48 9 40.56 46.39 44.47 45.36 29.12 10 42.13 45.76 45.36 45.71 33.56

[0124] As can be seen from Table 2, compared with existing products, the sun protection values ​​of the materials obtained in Examples 1-4 are more stable and do not fluctuate much.

[0125] The only difference between Example 1 and Example 2 is the preparation equipment in S5. The sun protection performance of the sunscreen powder in Example 2 is significantly stronger than that in Example 1. Therefore, the sun protection performance of the sunscreen powder can be improved by using the sunscreen powder preparation equipment of the present invention.

[0126] Compared with Example 2, Examples 3 and 4 differ only in the processing conditions; the equipment used in the processing steps is the same. The sun protection performance values ​​of the sunscreen powder in Examples 3 and 4 are slightly weaker than those in Example 2. This shows that different processing conditions can also affect the sun protection performance value of sunscreen powder.

[0127] In summary, the sun protection performance of the sun protection powder prepared using this process is superior to that of sun protection powder prepared using existing processes.

[0128] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A preparation process for sunscreen powder, characterized in that: Includes the following steps, S1. Add nano-TiO2 to deionized water and ultrasonically stir. Stearic acid and aluminum chloride are added during the stirring process to obtain a modified nano-TiO2 dispersion with good dispersibility. S2. Add anhydrous ethanol to deionized water and mix thoroughly. Add concentrated sulfuric acid to adjust the pH value to 3-5. Add the mixture of silane modifier and silicone oil modifier and stir for 15-20 minutes. Stop stirring when the solution changes from transparent to blue. This is how to obtain the hydrolysate. S3. Add at least one of the following to a high-speed mixer: zeolite imidazole ester skeleton, silica, synthetic fluorophlogopite, sericite, muscovite, alumina, talc, and organosilicon powder, and mix for 30-40 minutes to obtain mixed aggregate. S4. Then, the mixed aggregate is fed into the mixer and mixed for 20-30 minutes. During the mixing process, the modified nano-TiO2 dispersion prepared in S1 is added. After thorough mixing, the hydrolysate prepared in S2 is added into the mixer and mixed for another 10-15 minutes to obtain a composite paste. S5. Distribute the composite paste evenly and put it into a dryer for drying. After drying, composite blocks are obtained. Place the obtained composite blocks into a disperser for uniform dispersion to form composite particles. S6. Place the dispersed composite particles in a grinder and grind them to obtain the desired composite powder.

2. The preparation process of a sunscreen powder according to claim 1, characterized in that, In step S1, after adding aluminum chloride and stearic acid, stir for 20-25 minutes until there are no obvious floating solids on the surface of the slurry. If there are obvious floating solids, continue stirring and mixing. After stirring is completed, adjust the pH value to 4-5.

3. The preparation process of a sunscreen powder according to claim 2, characterized in that, In step S6, the temperature of the dryer is set to 100-150°C, and the time is 7-9 hours.

4. The preparation process of a sunscreen powder according to claim 1, characterized in that, The disperser used in step S5 is a sunscreen powder preparation equipment, including a first shell (1) and a second shell (2). The first shell (1) and the second shell (2) are fixedly connected by multiple bolts. A preparation tank (3) is set inside the first shell (1). A first transmission bevel gear (4) and a second transmission bevel gear (5) are rotatably connected inside the first shell (1). A third transmission bevel gear (6) is coaxially fixedly connected to the top surface of the preparation tank (3). Both the second transmission bevel gear (5) and the third transmission bevel gear (6) mesh with the first transmission bevel gear (4). A dispersing rod (7) is rotatably connected inside the preparation tank (3). The top end of the dispersing rod (7) is pin-connected to the axis of the second transmission bevel gear (5). The preparation tank (3) is equipped with a dispersing blade (8) and a multi-angle dispersing component that cooperates with the dispersing rod (7). Both the first shell (1) and the second shell (2) are equipped with stabilizing components to stabilize the rotation of the preparation tank (3). The bottom of the first shell (1) is equipped with a drive motor (9). The output shaft of the drive motor (9) is coaxially fixed with a fixing sleeve (10). The fixing sleeve (10) is inserted into the preparation tank (3). The fixing sleeve (10) is equipped with a limiting component to fix the connection state of the preparation tank (3). The top of the preparation tank (3) is equipped with a feeding component. The bottom of the preparation tank (3) is equipped with a discharging component. The first shell (1) is equipped with a striking component to strike and vibrate the preparation tank (3).

5. The preparation process of a sunscreen powder according to claim 4, characterized in that, Both the first shell (1) and the second shell (2) have a pair of combined toothed rails fixed inside. The two pairs of toothed rails are connected to form a pair of toothed rings (11), and each toothed ring (11) is connected to a multi-angle dispersion component. The multi-angle dispersion component includes a connecting frame (12) fixedly connected to the dispersion tank, a pair of transmission bevel gears four (13) rotatably connected to the connecting frame (12), and a transmission bevel gear five (14) rotatably connected to the dispersion tank. Both transmission bevel gears four (13) mesh with the corresponding transmission bevel gear five (14). A pair of dispersion turbines (15) are rotatably connected inside the dispersion tank, and both dispersion turbines (15) are coaxially fixedly connected to the corresponding transmission bevel gear five (14). Both transmission bevel gears four (13) are coaxially fixedly connected with transmission gears (16). Both transmission gears (16) are... The stabilizing component includes a pair of sliding buckle arms (17) slidably connected in the connecting frame (12) and a meshing gear one (18) rotatably connected in the connecting frame (12). Both sides of the meshing gear one (18) are coaxially fixedly connected to transmission screws (19). Both transmission screws (19) are threadedly connected to the corresponding sliding buckle arms (17). Both the first shell frame (1) and the second shell frame (2) are fixedly connected to mutually mating limit slide rails (20), and both sliding buckle arms (17) are slidably connected to the limit slide rails (20). A servo motor one (37) is fixedly fixed in the connecting frame (12). The output shaft of the servo motor one (37) is coaxially fixedly connected to a meshing gear two (22). A toothed belt (23) is connected to the meshing gear two (22) and the meshing gear one (18).

6. The preparation process of a sunscreen powder according to claim 4, characterized in that, The limiting assembly includes a limiting cylinder (24) fixed on a fixed sleeve (10) and a limiting rod (25) slidably connected inside the limiting cylinder (24). The bottom end of the preparation tank (3) is provided with a snap-fit ​​hole (26). An adjusting thread groove (27) is provided inside the limiting rod (25). A transmission bevel gear six (28) is rotatably connected inside the limiting cylinder (24). An adjusting screw (29) is coaxially fixedly connected to the transmission bevel gear six (28). The adjusting screw (29) is threadedly connected to the adjusting thread groove (27). A transmission bevel gear seven (30) is rotatably connected inside the limiting cylinder (24). The transmission bevel gear seven (30) meshes with the transmission bevel gear six (28). An adjusting wheel (31) is provided outside the limiting cylinder (24). The adjusting wheel (31) is coaxially fixedly connected to the transmission bevel gear seven (30). One end of the limiting rod (25) is snapped into the snap-fit ​​hole (26).

7. The preparation process of a sunscreen powder according to claim 4, characterized in that, The feeding assembly includes a feeding rack (32) fixed on the preparation tank (3), a feeding port (33) opened inside the feeding rack (32), a feeding hopper (34) fixed on the feeding port (33), and a conveying channel (35) opened inside the feeding rack (32). A conveying screw (36) is rotatably connected inside the conveying channel (35), and a servo motor (37) is fixed inside the feeding rack (32). The output shaft of the servo motor (37) is coaxially fixedly connected to a... The feeding rack (32) is rotatably connected to the meshing gear three (38), the feeding rack (32) is coaxially fixedly connected to the feeding screw (36), the meshing gear three (38) and the meshing gear four (39) mesh, and the bottom end of the feeding port (33) is connected to the feeding channel (35), and one end of the feeding channel (35) is connected to the preparation tank (3), and one end of the feeding channel (35) is fixed with the electric brake one (40).

8. The preparation process of a sunscreen powder according to claim 4, characterized in that, The discharge assembly is a discharge valve (41) fixed on the preparation tank (3). The input end of the discharge valve (41) is connected to the preparation tank (3). A conveying assembly is provided inside the first shell (1). The output end of the discharge valve (41) is connected to the conveying assembly. The conveying assembly includes a movable groove (42) opened inside the first shell (1) and a receiving hopper (43) slidably connected inside the movable groove (42). An adjusting screw (44) is rotatably connected inside the first shell (1), and a fixed part is inside the first shell (1). Servo motor 2 (45) is coaxially fixedly connected to the control screw (44). The control screw (44) is threadedly connected to the receiving hopper (43). The housing 1 (1) is fixed with a feed pump (46). The input end of the feed pump (46) is connected to the output end of the receiving hopper (43) through a telescopic tube. The output end of the feed pump (46) is exposed outside the housing 1 (1). The feed end of the feed hopper (34) is docked with the output end of the discharge valve (41).

9. The preparation process of a sunscreen powder according to claim 4, characterized in that, The striking assembly includes a striking frame (47) fixedly connected inside the shell frame (1), a guide groove (48) opened inside the striking frame (47), a pushing block (49) slidably connected inside the guide groove (48), a return spring (50) fixed between the pushing block and the bottom of the guide groove (48), a striking block (51) fixed at the bottom of the pushing block, the bottom end of the striking block (51) striking the surface of the preparation tank (3), a pushing block (52) fixed on the shaft of the transmission bevel gear (5), both the pushing block and the pushing block (52) are semi-circular plates, and the arc ends of the pushing block and the pushing block (52) are pressed together.

10. The preparation process of a sunscreen powder according to claim 4, characterized in that, The shell frame (1) has an exposed opening (53), a cover (54) is hinged to the exposed opening (53), a handle (55) is fixed on the cover (54), an exhaust valve (56) is fixed on the preparation tank (3), and multiple baffles (57) are fixed inside the preparation tank (3).

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