Friction controlled-release fragrant and moist playing toy based on essence microcapsules and preparation method of friction controlled-release fragrant and moist playing toy

Abstract

The invention discloses a friction controlled-release fragrant damp toy based on essence microcapsules and a preparation method of the friction controlled-release fragrant damp toy. The friction controlled-release fragrant damp toy comprises a damp toy body, a texture adaptive primer layer and an essence microcapsule coating from inside to outside. The tide toy body is subjected to plasma pretreatment, and the primer layer is acrylate primer. A visual identification precise spraying and gradient curing process is adopted in the preparation process. Through the synergistic effect of the wall material, the primer layer and plasma pretreatment, the fragrance retention time of the product reaches 100 days, the 10N friction fragrance release concentration is 3.8 mg / m, the coating adhesion is level 1, the friction resistance is excellent, skin irritation is avoided, and the multi-sensory interaction and collection requirements are met.

Description

Technical Field

[0001] This invention relates to the field of toy manufacturing technology, and in particular to a triboelectric controlled-release fragrance toy based on fragrance microcapsules and its preparation method. Background Technology

[0002] As a refined category of plastic toys, trendy toys are highly favored by teenagers and collectors due to their accurate model reproduction and rich artistic expression. However, the decorative effects of existing trendy toy products are mostly focused on the visual level, enhancing aesthetics through color spraying and detailed engraving. Their functionality is relatively limited, lacking tactile and olfactory interactive experiences, making it difficult to meet consumers' diverse needs for product fun and immersive experiences.

[0003] Some toy manufacturers have attempted to add fragrance to trendy toys to enhance their appeal, but they all use traditional fragrance addition methods. These methods have several drawbacks, such as extremely short-lasting fragrance, which can easily trigger allergic reactions when in contact with consumers' skin. Furthermore, fragrance molecules are easily affected by external environmental factors and can oxidize and deteriorate under the influence of oxygen and humidity. This can not only cause the fragrance to change its taste but may also produce harmful substances, affecting the safety of product use.

[0004] Microencapsulation technology, as a mature functional material preparation technology, has been widely used in food, daily chemicals, and pharmaceuticals. This technology encapsulates a liquid core material with a polymer wall material to form a microcapsule structure, effectively isolating the core material from the external environment, reducing volatilization and deterioration, and achieving a controllable "externally triggered release" effect. In the food industry, flavor substances encapsulated using microencapsulation technology can have a longer fragrance retention time; in the daily chemicals industry, microcapsule fragrance products can release fragrance on demand through friction, pressing, etc. However, there is currently no technical solution to combine microencapsulation technology with trendy toys. The main reason is that trendy toys have extremely high requirements for appearance, texture, and shape integrity. If the particle size and coating thickness of conventional microcapsule materials are not properly controlled, it will damage the delicate shape and surface smoothness of the toys. Furthermore, trendy toys are used in everyday touch and friction scenarios, requiring the microcapsule wall material to precisely rupture and release fragrance within a specific pressure range (finger friction pressure), and the coating must have good adhesion and abrasion resistance to prevent peeling and affecting the product's appearance. These technical challenges prevent microencapsulation technology from being directly applied to trendy toys.

[0005] Therefore, developing a friction-controlled fragrance-releasing trendy toy based on fragrance microcapsules and its preparation method that can achieve controlled fragrance release, long-lasting fragrance, safe use, and ensure the integrity of the shape and the texture of the appearance is of great practical significance. Summary of the Invention

[0006] The main objective of this invention is to overcome the above-mentioned shortcomings and provide a friction-controlled fragrance release trendy toy based on fragrance microcapsules and its preparation method, which can achieve controlled fragrance release, long-lasting fragrance, safe use, and ensure the integrity of the shape and the texture of the appearance.

[0007] To achieve the above objectives, this invention provides a tribologically controlled-release fragrance toy based on fragrance microcapsules, comprising, from the inside out, a toy body, a texture-adaptive primer layer, and a fragrance microcapsule coating; the texture-adaptive primer layer is an acrylic primer, applied to specific areas of the toy body prone to friction; the fragrance microcapsule coating is prepared by mixing fragrance microcapsules, film-forming aids, dispersants, and diluents in a mass ratio of (8-12):(2-4):(0.8-1.2):(5-7); the fragrance microcapsules are formed by encapsulating liquid fragrance core material and polymer wall material through a microcapsule preparation process, wherein the polymer wall material is a gelatin-gum arabic composite wall material, sodium alginate wall material, or polyurea resin wall material.

[0008] Preferably, the toy body is made of environmentally friendly ABS plastic or PVC plastic, which complies with the GB 6675 toy safety standard.

[0009] Preferably, the thickness of the texture-adaptive primer layer is 20-50 μm; and the thickness of the fragrance microcapsule coating is 30-150 μm.

[0010] Preferably, the specific areas prone to friction include the hands of the toy, the folds of clothing, the raised parts of the hairstyle, and the surface of the accessory.

[0011] Preferably, the flavor microcapsules have a particle size of 5-50 μm and a wall material thickness of 2-5 μm.

[0012] Preferably, the core material of the flavor microcapsule is selected from one or more of strawberry flavor, rose flavor, and peppermint flavor, and the mass ratio of the core material to the wall material is 1:(3-6).

[0013] Preferably, the acrylic primer is an environmentally friendly acrylic polyurethane primer in various colors, provided by Xuzhou Daguang Coatings Co., Ltd.

[0014] Preferably, the film-forming aid is polyethylene glycol monomethyl ether acrylate with a number average molecular weight of 480.

[0015] Preferably, the dispersant is a polyethylene glycol dispersant with a number average molecular weight of 600.

[0016] Preferably, the diluent is a mixture of food-grade ethanol and deionized water at a volume ratio of 7:3.

[0017] Preferably, the preparation method of the flavor microcapsules includes the following steps: dissolving gelatin and gum arabic in deionized water at a mass ratio, adjusting the pH to 4.0-4.5, adding liquid flavor core material, emulsifying at 1000-1500 r / min for 10-20 min, cooling to 4-10℃, adding crosslinking agent glutaraldehyde, keeping the reaction at this temperature for 1-2 h, filtering, washing, and freeze-drying to obtain flavor microcapsules.

[0018] Preferably, the mass ratio of the gelatin, gum arabic, deionized water, and crosslinking agent glutaraldehyde is 1:(1-2):(18-38):(0.02-0.033).

[0019] Preferably, the preparation method of the flavor microcapsules includes the following steps: adding sodium alginate to deionized water and stirring to dissolve it at 40-50°C to form a sodium alginate aqueous solution with a mass fraction of 2%-5%; adding liquid flavor core material and emulsifying at 800-1000 r / min for 5-10 min to form a uniform emulsion; passing the emulsion through a sharp-hole plate with a pore size of 50-100 μm and dropping it into a calcium chloride solution with a mass fraction of 2%-5%, and solidifying for 10-20 min; filtering and collecting the microcapsules, washing them 3-5 times with deionized water, and drying them with hot air at 30-40°C for 8-12 h to obtain dried flavor microcapsules.

[0020] Preferably, the mass ratio of sodium alginate to calcium chloride solution is 1:(3-6).

[0021] Another object of the present invention is to provide a method for preparing the aforementioned triboelectric controlled-release fragrance toy based on fragrance microcapsules, comprising the following steps: Step S1, Pre-treatment of the collectible toy: Plasma is used to pre-treat the collectible toy. Step S2, Texture Adaptation Primer Coating: Using a high-precision atomizing spraying equipment equipped with a vision recognition system, the texture outline of the trendy toy is identified in real time. The primer is applied to the easily rubbed parts of the trendy toy body at a spraying angle of 50-90° and a pressure of 0.3-0.5MPa. It is pre-cured at 30-40℃ for 10-20 minutes, and then heated to 50-70℃ at a heating rate of 4-6℃ / min and held for 20-30 minutes. Step S3, Fragrance Microcapsule Layer Coating: After mixing all the raw materials for the fragrance microcapsule layer evenly, add them to a high-speed shear emulsifier and stir at 1000-1500 r / min for 40-60 min to form a uniform slurry; use a precision positioning spraying equipment to adaptively adjust the spraying amount according to the texture depth of the trendy toy, apply it to the surface of the primer layer with a pressure of 0.2-0.4 MPa, and dry at 50-60℃ for 25-35 min; Step S4, Finished Product Post-processing: Place the trendy toy in a constant temperature and humidity chamber at 25℃ and 50%RH for 24 hours to mature. After passing the appearance inspection, friction fragrance release test, and safety performance test, it is packaged to obtain the finished product.

[0022] Preferably, the plasma pretreatment power is 300-500W and the time is 3-5min.

[0023] Due to the application of the above technical solution, the present invention has the following beneficial effects: (1) The triboelectric controlled-release fragrance toy based on fragrance microcapsules disclosed in this invention, by precisely controlling the particle size (5-50μm) and coating thickness (30-150μm) of the fragrance microcapsules, combined with the buffering effect of the texture-adaptive primer layer, not only does not damage the original engraved details and surface texture of the toy, but also, through high-precision visual recognition spraying technology, makes the coating highly consistent with the texture outline of the toy, and the coating at some raised shapes can even slightly enhance the three-dimensionality of the texture. This effect of "functional coating not deteriorating the appearance, but enhancing the expressiveness of details" exceeds expectations and solves the industry problem of compatibility between functional materials and refined toy shapes.

[0024] (2) The friction-controlled fragrance release trendy toy based on fragrance microcapsules disclosed in this invention uses microcapsules prepared with customized polymer wall materials (gelatin-gum arabic composite wall materials, etc.). The microcapsules can be precisely broken and release fragrance under normal friction pressure of the fingers, while remaining closed when touched lightly in daily life, thus achieving precise triggering of "on-demand fragrance release". At the same time, the isolation and protection effect of the wall material protects the fragrance core material from the influence of oxygen and humidity, and the fragrance always remains pure and does not deteriorate, achieving a dual breakthrough of "controllable fragrance release" and "long-lasting fragrance", greatly improving the continuity of the user experience.

[0025] (3) The friction-controlled release fragrance trendy toy based on fragrance microcapsules disclosed in this invention completely avoids direct contact between the fragrance and human skin by encapsulating the fragrance core material with the microcapsule wall material. It has been tested according to GB 6675 toy safety standard and has no skin irritation. At the same time, the adhesion between the texture-adaptive primer layer and the trendy toy body has been tested and can withstand more than 500 repeated rubbings without falling off. The bonding strength between the fragrance microcapsule coating and the primer layer is also significantly better than that of conventional coatings. The use of food-grade diluents and environmentally friendly raw materials makes the product both skin-safe and environmentally friendly, solving the industry pain point of "safety and durability cannot be achieved at the same time" in functional toys.

[0026] (4) The friction-controlled release fragrance trendy toy based on fragrance microcapsules disclosed in this invention constructs an immersive interactive experience integrating "visual-tactile-olfactory" through a friction-triggered olfactory feedback design. Furthermore, the compounding scheme of various fragrance core materials can realize personalized fragrance customization, opening up the scenario-based application space of trendy toy products. At the same time, the intelligent technologies such as plasma pretreatment and visual recognition precision spraying incorporated into its manufacturing process not only improve product consistency but also provide a replicable technical paradigm for the functional upgrading of the trendy toy industry, promoting the industry's transformation from "refined shape" to "intelligent function and diversified experience".

[0027] (5) The friction-controlled release fragrance trendy toy based on fragrance microcapsules disclosed in this invention achieves controlled release of fragrance by coating specific parts of the trendy toy body with a fragrance microcapsule coating and utilizing the frictional rupture characteristics of the microcapsule wall material. This combines visual and olfactory experiences, significantly enhancing the fun and interactivity of the trendy toy product, meeting consumers' demand for immersive experiences, and strengthening the product's market competitiveness. By isolating the liquid fragrance core material from the outside world through the polymer wall material, the volatilization and deterioration of the fragrance are effectively avoided, and the fragrance retention time is extended. At the same time, the isolation effect of the wall material reduces the risk of direct contact between the fragrance and the human body. Combined with environmentally friendly trendy toy body materials and food-grade fragrance, the safety of the product is further improved. The fragrance microcapsule coating can be precisely sprayed on specific friction parts of the trendy toy, and the coating thickness and particle size are suitable, without damaging the original shape details and appearance texture of the trendy toy. At the same time, different types of liquid fragrance core materials can be selected according to the theme style of the trendy toy, adapting to diverse product design needs. It has a wide range of applications and strong practicality and promotional value. Detailed Implementation

[0028] The following description is intended to disclose the invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art. Example 1

[0029] A tribologically controlled-release fragrance toy based on fragrance microcapsules comprises, from the inside out, a toy body, a texture-adaptive primer layer, and a fragrance microcapsule coating; the texture-adaptive primer layer is an acrylic primer, applied to specific friction-prone areas of the toy body; the fragrance microcapsule coating is made by mixing fragrance microcapsules, film-forming aids, dispersants, and diluents in a mass ratio of 8:2:0.8:5; the fragrance microcapsules are formed by encapsulating liquid fragrance core material and polymer wall material through a microcapsule preparation process, wherein the polymer wall material is a gelatin-gum arabic composite wall material.

[0030] The toy body is made of environmentally friendly ABS plastic, which meets the GB 6675 toy safety standard; the thickness of the texture-adaptive primer layer is 20μm; the thickness of the fragrance microcapsule coating is 30μm; the easily rubbed specific part is the toy's hand; the fragrance microcapsule particle size is 5μm and the wall material thickness is 2μm.

[0031] The core material of the flavor microcapsules is strawberry flavor, and the mass ratio of the core material to the wall material is 1:3; the acrylic primer is an environmentally friendly acrylic polyurethane primer in various colors, provided by Xuzhou Daguang Coatings Co., Ltd.; the film-forming aid is polyethylene glycol monomethyl ether acrylate with a number average molecular weight of 480; the dispersant is polyethylene glycol dispersant with a number average molecular weight of 600; and the diluent is a mixture of food-grade ethanol and deionized water at a volume ratio of 7:3.

[0032] The preparation method of the flavor microcapsules includes the following steps: dissolving gelatin and gum arabic in deionized water at a mass ratio, adjusting the pH to 4.0, adding liquid flavor core material, emulsifying at 1000 r / min for 10 min, cooling to 4℃, adding crosslinking agent glutaraldehyde, keeping the reaction at this temperature for 1 h, filtering, washing, and freeze-drying to obtain flavor microcapsules; the mass ratio of gelatin, gum arabic, deionized water, and crosslinking agent glutaraldehyde is 1:1:18:0.02.

[0033] A method for preparing the aforementioned triboelectric controlled-release fragrance toy based on fragrance microcapsules includes the following steps: Step S1, Pre-treatment of the toy body: Plasma pre-treatment is used on the toy body; the power of the plasma pre-treatment is 300W and the time is 3min; Step S2, Texture Adaptation Primer Coating: Using a high-precision atomizing spraying equipment equipped with a vision recognition system, the texture outline of the trendy toy is identified in real time. The coating is applied to the easily rubbed parts of the trendy toy body at a spraying angle of 50° and a pressure of 0.3MPa. It is pre-cured at 30°C for 10 minutes, then heated to 50°C at a heating rate of 4°C / min and kept at that temperature for 20 minutes. Step S3, Fragrance Microcapsule Layer Coating: After mixing all the raw materials of the fragrance microcapsule layer evenly, add them to a high-speed shear emulsifier and stir at 1000r / min for 40min to form a uniform slurry; use a precision positioning spraying equipment to adaptively adjust the spraying amount according to the texture depth of the trendy toy, apply it to the surface of the primer layer with a pressure of 0.2MPa, and dry at 50℃ for 25min. Step S4, Finished Product Post-processing: Place the trendy toy in a constant temperature and humidity chamber at 25℃ and 50%RH for 24 hours to mature. After passing the appearance inspection, friction fragrance release test, and safety performance test, it is packaged to obtain the finished product. Example 2

[0034] A tribologically controlled-release fragrance toy based on fragrance microcapsules comprises, from the inside out, a toy body, a texture-adaptive primer layer, and a fragrance microcapsule coating; the texture-adaptive primer layer is an acrylic primer, applied to specific areas of the toy body prone to friction; the fragrance microcapsule coating is prepared by mixing fragrance microcapsules, film-forming aids, dispersants, and diluents in a mass ratio of 9:2.5:0.9:5.5; the fragrance microcapsules are formed by encapsulating liquid fragrance core material and polymer wall material through a microcapsule preparation process, wherein the polymer wall material is sodium alginate wall material.

[0035] The toy body is made of environmentally friendly PVC plastic, conforming to the GB 6675 toy safety standard; the thickness of the texture-adaptive primer layer is 30μm; the thickness of the fragrance microcapsule coating is 50μm; the specific areas prone to friction are the folds of clothing; the particle size of the fragrance microcapsules is 10μm, and the wall material thickness is 3μm; the core material of the fragrance microcapsules is rose fragrance, and the mass ratio of core material to wall material is 1:4; the acrylic primer is an environmentally friendly acrylic polyurethane primer in various colors, provided by Xuzhou Daguang Coatings Co., Ltd.; the film-forming aid is polyethylene glycol monomethyl ether acrylate with a number average molecular weight of 480; the dispersant is polyethylene glycol dispersant with a number average molecular weight of 600; the diluent is a mixture of food-grade ethanol and deionized water at a volume ratio of 7:3.

[0036] The preparation method of the flavor microcapsules includes the following steps: adding sodium alginate to deionized water and stirring to dissolve it at 40°C to form a 2% sodium alginate aqueous solution; adding liquid flavor core material and emulsifying at 800 r / min for 5 min to form a uniform emulsion; passing the emulsion through a 50 μm pore size plate and dripping it into a 2% calcium chloride solution, and solidifying for 10 min; filtering and collecting the microcapsules, washing them three times with deionized water, and drying them with hot air at 30°C for 8 h to obtain dried flavor microcapsules; the mass ratio of sodium alginate to calcium chloride solution is 1:3.

[0037] A method for preparing the aforementioned triboelectric controlled-release fragrance toy based on fragrance microcapsules includes the following steps: Step S1, Pre-treatment of the toy body: Plasma pre-treatment is used on the toy body; the power of the plasma pre-treatment is 350W and the time is 3.5min; Step S2, Texture Adaptation Primer Coating: Using a high-precision atomizing spraying equipment equipped with a vision recognition system, the texture outline of the trendy toy is identified in real time. The coating is applied to the easily rubbed parts of the trendy toy body at a spraying angle of 60° and a pressure of 0.35MPa. It is pre-cured at 33°C for 13 minutes, heated to 55°C at a heating rate of 4.5°C / min, and held at that temperature for 23 minutes. Step S3, Fragrance Microcapsule Layer Coating: After mixing all the raw materials of the fragrance microcapsule layer evenly, add them to a high-speed shear emulsifier and stir at 1200r / min for 45min to form a uniform slurry; use a precision positioning spraying equipment to adaptively adjust the spraying amount according to the texture depth of the trendy toy, apply it to the surface of the primer layer with a pressure of 0.25MPa, and dry at 53℃ for 27min. Step S4, Finished Product Post-processing: Place the trendy toy in a constant temperature and humidity chamber at 25℃ and 50%RH for 24 hours to mature. After passing the appearance inspection, friction fragrance release test, and safety performance test, it is packaged to obtain the finished product. Example 3

[0038] A tribologically controlled-release fragrance toy based on fragrance microcapsules comprises, from the inside out, a toy body, a texture-adaptive primer layer, and a fragrance microcapsule coating layer; the texture-adaptive primer layer is an acrylic primer, applied to specific areas of the toy body prone to friction; the fragrance microcapsule coating layer is made by mixing fragrance microcapsules, film-forming aids, dispersants, and diluents in a mass ratio of 10:3:1:6; the fragrance microcapsules are formed by encapsulating liquid fragrance core material and polymer wall material through a microcapsule preparation process, wherein the polymer wall material is a gelatin-gum arabic composite wall material.

[0039] The toy body is made of environmentally friendly ABS plastic, conforming to the GB 6675 toy safety standard; the thickness of the texture-adaptive primer layer is 35μm; the thickness of the fragrance microcapsule coating is 100μm; the easily rubbed specific area is the hair-style protrusion; the particle size of the fragrance microcapsules is 20μm, and the wall material thickness is 3.5μm; the core material of the fragrance microcapsules is peppermint fragrance, and the mass ratio of core material to wall material is 1:4.5; the acrylic primer is an environmentally friendly acrylic polyurethane primer in various colors, provided by Xuzhou Daguang Coatings Co., Ltd.; the film-forming aid is polyethylene glycol monomethyl ether acrylate with a number average molecular weight of 480; the dispersant is polyethylene glycol dispersant with a number average molecular weight of 600; the diluent is a mixture of food-grade ethanol and deionized water at a volume ratio of 7:3.

[0040] The preparation method of the flavor microcapsules includes the following steps: dissolving gelatin and gum arabic in deionized water at a mass ratio, adjusting the pH to 4.3, adding liquid flavor core material, emulsifying at 1300 r / min for 15 min, cooling to 7°C, adding crosslinking agent glutaraldehyde, maintaining the temperature for 1.5 h, filtering, washing, and freeze-drying to obtain flavor microcapsules; the mass ratio of gelatin, gum arabic, deionized water, and crosslinking agent glutaraldehyde is 1:1.5:28:0.025.

[0041] A method for preparing the aforementioned triboelectric controlled-release fragrance toy based on fragrance microcapsules includes the following steps: Step S1, Pre-treatment of the toy body: Plasma pre-treatment is used on the toy body; the power of the plasma pre-treatment is 400W and the time is 4min; Step S2, Texture Adaptation Primer Coating: Using a high-precision atomizing spraying equipment equipped with a vision recognition system, the texture outline of the trendy toy is identified in real time. The coating is applied to the easily rubbed parts of the trendy toy body at a spraying angle of 70° and a pressure of 0.4MPa. It is pre-cured at 35°C for 15 minutes, and then heated to 60°C at a heating rate of 5°C / min and kept at that temperature for 25 minutes. Step S3, Fragrance Microcapsule Layer Coating: After mixing all the raw materials of the fragrance microcapsule layer evenly, add them to a high-speed shear emulsifier and stir at 1300r / min for 50min to form a uniform slurry; use a precision positioning spraying equipment to adaptively adjust the spraying amount according to the texture depth of the trendy toy, apply it to the surface of the primer layer with a pressure of 0.3MPa, and dry at 55℃ for 30min. Step S4, Finished Product Post-processing: Place the trendy toy in a constant temperature and humidity chamber at 25℃ and 50%RH for 24 hours to mature. After passing the appearance inspection, friction fragrance release test, and safety performance test, it is packaged to obtain the finished product. Example 4

[0042] A tribologically controlled-release fragrance toy based on fragrance microcapsules comprises, from the inside out, a toy body, a texture-adaptive primer layer, and a fragrance microcapsule coating; the texture-adaptive primer layer is an acrylic primer, applied to specific areas of the toy body prone to friction; the fragrance microcapsule coating is made by mixing fragrance microcapsules, film-forming aids, dispersants, and diluents in a mass ratio of 11:3.5:1.1:6.5; the fragrance microcapsules are formed by encapsulating liquid fragrance core material and polymer wall material through a microcapsule preparation process, wherein the polymer wall material is sodium alginate wall material.

[0043] The toy body is made of environmentally friendly PVC plastic, conforming to the GB 6675 toy safety standard; the thickness of the texture-adaptive primer layer is 40μm; the thickness of the fragrance microcapsule coating is 130μm; the easily rubbed specific part is the toy's hand; the fragrance microcapsule particle size is 40μm, and the wall material thickness is 4μm; the core material of the fragrance microcapsules is a blend of strawberry fragrance, rose fragrance, and mint fragrance in a mass ratio of 1:2:2, and the mass ratio of core material to wall material is 1:5; the acrylic primer is an environmentally friendly acrylic polyurethane primer in various colors, provided by Xuzhou Daguang Coatings Co., Ltd.; the film-forming aid is polyethylene glycol monomethyl ether acrylate with a number average molecular weight of 480; the dispersant is polyethylene glycol dispersant with a number average molecular weight of 600; the diluent is a mixture of food-grade ethanol and deionized water in a volume ratio of 7:3.

[0044] The preparation method of the flavor microcapsules includes the following steps: adding sodium alginate to deionized water and stirring to dissolve it at 48°C to form a sodium alginate aqueous solution with a mass fraction of 4.5%; adding liquid flavor core material and emulsifying at 950 r / min for 9 min to form a uniform emulsion; passing the emulsion through a sharp-hole plate with a pore size of 90 μm and dropping it into a calcium chloride solution with a mass fraction of 4.5% and solidifying for 18 min; filtering and collecting the microcapsules, washing them 5 times with deionized water, and drying them with hot air at 38°C for 11 h to obtain dried flavor microcapsules; the mass ratio of sodium alginate to calcium chloride solution is 1:5.5.

[0045] A method for preparing the aforementioned triboelectric controlled-release fragrance toy based on fragrance microcapsules includes the following steps: Step S1, Pre-treatment of the toy body: Plasma pre-treatment is used on the toy body; the power of the plasma pre-treatment is 450W and the time is 4.5min; Step S2, Texture Adaptation Primer Coating: Using a high-precision atomizing spraying equipment equipped with a vision recognition system, the texture outline of the trendy toy is identified in real time. The coating is applied to the easily rubbed parts of the trendy toy body at a spraying angle of 80° and a pressure of 0.45MPa. It is pre-cured at 38°C for 18 minutes, heated to 65°C at a heating rate of 5.5°C / min, and held at that temperature for 28 minutes. Step S3, Fragrance Microcapsule Layer Coating: After mixing all the raw materials of the fragrance microcapsule layer evenly, add them to a high-speed shear emulsifier and stir at 1400r / min for 55min to form a uniform slurry; use a precision positioning spraying equipment to adaptively adjust the spraying amount according to the texture depth of the trendy toy, apply it to the surface of the primer layer with a pressure of 0.35MPa, and dry at 58℃ for 33min. Step S4, Finished Product Post-processing: Place the trendy toy in a constant temperature and humidity chamber at 25℃ and 50%RH for 24 hours to mature. After passing the appearance inspection, friction fragrance release test, and safety performance test, it is packaged to obtain the finished product. Example 5

[0046] A tribologically controlled-release fragrance toy based on fragrance microcapsules comprises, from the inside out, a toy body, a texture-adaptive primer layer, and a fragrance microcapsule coating layer; the texture-adaptive primer layer is an acrylic primer, applied to specific friction-prone areas of the toy body; the fragrance microcapsule coating layer is made by mixing fragrance microcapsules, film-forming aids, dispersants, and diluents in a mass ratio of 12:4:1.2:7; the fragrance microcapsules are formed by encapsulating liquid fragrance core material and polymer wall material through a microcapsule preparation process, wherein the polymer wall material is a gelatin-gum arabic composite wall material.

[0047] The toy body is made of environmentally friendly ABS plastic, conforming to the GB 6675 toy safety standard; the thickness of the texture-adaptive primer layer is 50μm; the thickness of the fragrance microcapsule coating is 150μm; the easily rubbed specific parts include the toy's hands, clothing folds, hair styling protrusions, and accessory surfaces; the fragrance microcapsules have a particle size of 50μm and a wall material thickness of 5μm; the core material of the fragrance microcapsules is strawberry fragrance, with a core material to wall material mass ratio of 1:6; the acrylic primer is an environmentally friendly acrylic polyurethane primer in various colors, provided by Xuzhou Daguang Coatings Co., Ltd.; the film-forming aid is polyethylene glycol monomethyl ether acrylate with a number average molecular weight of 480; the dispersant is polyethylene glycol dispersant with a number average molecular weight of 600; the diluent is a mixture of food-grade ethanol and deionized water at a volume ratio of 7:3.

[0048] The preparation method of the flavor microcapsules includes the following steps: dissolving gelatin and gum arabic in deionized water at a mass ratio, adjusting the pH to 4.5, adding liquid flavor core material, emulsifying at 1500 r / min for 20 min, cooling to 10℃, adding crosslinking agent glutaraldehyde, keeping the reaction at this temperature for 2 h, filtering, washing, and freeze-drying to obtain flavor microcapsules; the mass ratio of gelatin, gum arabic, deionized water, and crosslinking agent glutaraldehyde is 1:2:38:0.033.

[0049] A method for preparing the aforementioned triboelectric controlled-release fragrance toy based on fragrance microcapsules includes the following steps: Step S1, Pre-treatment of the toy body: Plasma pre-treatment is used on the toy body; the power of the plasma pre-treatment is 500W and the time is 5min; Step S2, Texture Adaptation Primer Coating: Using a high-precision atomizing spraying equipment equipped with a vision recognition system, the texture outline of the trendy toy is identified in real time. The coating is applied to the easily rubbed parts of the trendy toy body at a spraying angle of 90° and a pressure of 0.5MPa. It is pre-cured at 40°C for 20 minutes, heated to 70°C at a heating rate of 6°C / min, and kept at that temperature for 30 minutes. Step S3, Fragrance Microcapsule Layer Coating: After mixing all the raw materials of the fragrance microcapsule layer evenly, add them to a high-speed shear emulsifier and stir at 1500r / min for 60min to form a uniform slurry; use a precision positioning spraying equipment to adaptively adjust the spraying amount according to the texture depth of the trendy toy, apply it to the surface of the primer layer with a pressure of 0.4MPa, and dry at 60℃ for 35min. Step S4, Finished Product Post-processing: Place the trendy toy in a constant temperature and humidity chamber at 25℃ and 50%RH for 24 hours to mature. After passing the appearance inspection, friction fragrance release test, and safety performance test, it is packaged to obtain the finished product.

[0050] Comparative Example 1 A triboelectric controlled-release fragrance toy based on fragrance microcapsules and its preparation method are basically the same as those in Example 5, except that there is no texture-adaptive primer layer.

[0051] Comparative Example 2 A triboelectric controlled-release fragrance toy based on fragrance microcapsules and its preparation method are basically the same as those in Example 5, except that an equal amount of gelatin is used instead of gum arabic.

[0052] Comparative Example 3 A friction-controlled release fragrance trendy toy based on fragrance microcapsules and its preparation method are basically the same as those in Example 5, except that an equal amount of gum arabic is used instead of gelatin.

[0053] Comparative Example 4 A triboelectric controlled-release fragrance toy based on fragrance microcapsules and its preparation method are basically the same as those in Example 5, except that there is no plasma pretreatment step.

[0054] To further illustrate the beneficial technical effects of the friction-controlled release fragrance toy based on fragrance microcapsules involved in the embodiments of the present invention, relevant performance tests were conducted on the friction-controlled release fragrance toy based on fragrance microcapsules involved in Example 5 and Comparative Examples 1-4. The test results are shown in Table 1, and the test methods are as follows: (1) Fragrance retention time test: The samples of each case were placed in a constant temperature and humidity environment of 25℃ and 50% relative humidity, and rubbed regularly (once a week, 10N pressure for 10 times). The electronic nose detection method (detecting the concentration of fragrance characteristic components) was used. The samples were tested once a day, and the time when the concentration of the electronic nose detected characteristic components of the sample dropped to the detection limit was recorded as the fragrance retention time.

[0055] (2) Friction release test: A tension gauge was used to simulate the friction pressure of a finger. A specific part of the sample was rubbed 10 times with a pressure of 10N (friction speed 1 time / second). The concentration of fragrance characteristic components in the environment after friction was detected by gas chromatography-mass spectrometry (GC-MS) and used as the friction release amount.

[0056] (3) Skin irritation test: 30 healthy subjects (15 males and 15 females, aged 18-45 years) were selected. The coated part of the sample was in contact with the skin on the inner side of the subject's forearm for 24 hours. The irritation reaction such as erythema, edema, and itching was observed at the contact site.

[0057] (4) Coating adhesion test: Refer to GB / T 9286-1998 "Cross-cut test of paint and varnish film", use a cross-cut tester to cut 10×10 1mm² squares on the sample coating surface, with the cross-cut depth reaching the surface of the toy body. Then apply 3M tape and quickly peel it off, observe the peeling of the coating in the squares. Adhesion grade standard: Grade 1 = no peeling, Grade 2 = peeling area ≤5%, Grade 3 = peeling area 5%-15%, Grade 4 = peeling area 15%-35%, Grade 5 = peeling area >35%.

[0058] (5) Abrasion resistance test: Using an abrasion tester, the coating part of the sample is subjected to 500 reciprocating frictions under a 500g load (the friction medium is cotton cloth, and the friction speed is 50 times / minute). After friction, the integrity of the coating is observed and whether peeling or cracking occurs is recorded.

[0059] Table 1 project Example 5 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Scent duration (days) 100 45 70 65 85 Fragrance release concentration from friction (mg / m³) 3.8 1.6 2.9 2.5 3.2 Number of people experiencing skin irritation 0 0 0 0 0 Adhesion rating (level) 1 4 2 2 3 Coating condition after 500 rubs Complete, no peeling, no cracks Large areas peeled off, exposing the original body. Slight cracking, no peeling No cracks, slight wear on the edges Partial detachment As shown in Table 1, the friction-controlled fragrance release toys of Example 5 (containing gelatin-gum arabic composite wall material, texture-matching primer layer, and plasma pretreatment) have a fragrance retention time of up to 100 days, a friction fragrance release concentration of 3.8 mg / m³, a coating adhesion of Grade 1, and remain intact after 500 rubs without peeling off. All samples showed no skin irritation. In contrast, Comparative Example 1 (without primer layer) had a fragrance retention time of only 45 days and a large area of ​​the coating peeled off. Comparative Examples 2-3 (single gelatin / gum arabic wall material) had a fragrance retention time of 65-70 days and a fragrance release concentration of 2.5-2.9 mg / m³. Comparative Example 4 (without plasma pretreatment) had a fragrance retention time of 85 days and a partial coating peeling off. This fully demonstrates that the synergistic effect of the composite wall material, primer layer, and plasma pretreatment can significantly improve the fragrance retention time, friction fragrance release effect, coating adhesion, and abrasion resistance of the toys.

[0060] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. A triboelectric controlled-release fragrance toy based on fragrance microcapsules, characterized in that, From the inside out, the toy consists of a toy body, a texture-adaptive primer layer, and a fragrance microcapsule coating. The texture-adaptive primer layer is an acrylic primer, applied to specific areas of the toy body that are prone to friction. The fragrance microcapsule coating is made by mixing fragrance microcapsules, film-forming aids, dispersants, and diluents in a mass ratio of (8-12):(2-4):(0.8-1.2):(5-7). The fragrance microcapsules are formed by encapsulating liquid fragrance core material and polymer wall material through a microcapsule preparation process. The polymer wall material is a gelatin-gum arabic composite wall material, sodium alginate wall material, or polyurea resin wall material.

2. The triboelectric controlled-release fragrance toy based on fragrance microcapsules according to claim 1, characterized in that, The toy itself is made of environmentally friendly ABS or PVC plastic, and complies with the GB 6675 toy safety standard.

3. The triboelectric controlled-release fragrance toy based on fragrance microcapsules according to claim 1, characterized in that, The thickness of the texture-adaptive primer layer is 20-50 μm; the thickness of the fragrance microcapsule coating is 30-150 μm.

4. The triboelectric controlled-release fragrance toy based on fragrance microcapsules according to claim 1, characterized in that, The specific areas prone to friction include the hands of the toy, the folds of clothing, the protrusions of the hair styling, and the surface of accessories.

5. The triboelectric controlled-release fragrance toy based on fragrance microcapsules according to claim 1, characterized in that, The flavor microcapsules have a particle size of 5-50 μm and a wall thickness of 2-5 μm.

6. The triboelectric controlled-release fragrance toy based on fragrance microcapsules according to claim 1, characterized in that, The core material of the flavor microcapsule is selected from one or more of strawberry flavor, rose flavor, and peppermint flavor, and the mass ratio of the core material to the wall material is 1:(3-6).

7. The triboelectric controlled-release fragrance toy based on fragrance microcapsules according to claim 1, characterized in that, The acrylic primer is an environmentally friendly acrylic polyurethane primer in various colors; the film-forming aid is polyethylene glycol monomethyl ether acrylate with a number average molecular weight of 480; the dispersant is polyethylene glycol dispersant with a number average molecular weight of 600; and the diluent is a mixture of food-grade ethanol and deionized water at a volume ratio of 7:

3.

8. The triboelectric controlled-release fragrance toy based on fragrance microcapsules according to claim 1, characterized in that, The preparation method of the flavor microcapsules includes the following steps: dissolving gelatin and gum arabic in deionized water at a mass ratio, adjusting the pH to 4.0-4.5, adding liquid flavor core material, emulsifying at 1000-1500 r / min for 10-20 min, cooling to 4-10℃, adding crosslinking agent glutaraldehyde, keeping the reaction at the temperature for 1-2 h, filtering, washing, and freeze-drying to obtain flavor microcapsules; the mass ratio of gelatin, gum arabic, deionized water, and crosslinking agent glutaraldehyde is 1:(1-2):(18-38):(0.02-0.033).

9. The triboelectric controlled-release fragrance toy based on fragrance microcapsules according to claim 1, characterized in that, The preparation method of the flavor microcapsules includes the following steps: adding sodium alginate to deionized water and stirring to dissolve it at 40-50°C to form a sodium alginate aqueous solution with a mass fraction of 2%-5%; adding liquid flavor core material and emulsifying it at a speed of 800-1000 r / min for 5-10 min to form a uniform emulsion. The emulsion was passed through a sharp-hole plate with a pore size of 50-100 μm and dropped into a calcium chloride solution with a mass fraction of 2%-5%, and solidified for 10-20 min. The microcapsules were collected by filtration, washed 3-5 times with deionized water, and dried with hot air at 30-40℃ for 8-12 h to obtain dried fragrance microcapsules. The mass ratio of sodium alginate to calcium chloride solution was 1:(3-6).

10. A method for preparing a triboelectric controlled-release fragrance toy based on fragrance microcapsules according to any one of claims 1-9, characterized in that, Includes the following steps: Step S1, Pre-treatment of the toy body: Plasma pre-treatment is used on the toy body; the power of the plasma pre-treatment is 300-500W and the time is 3-5min; Step S2, Texture Adaptation Primer Coating: Using a high-precision atomizing spraying equipment equipped with a vision recognition system, the texture outline of the trendy toy is identified in real time. The primer is applied to the easily rubbed parts of the trendy toy body at a spraying angle of 50-90° and a pressure of 0.3-0.5MPa. It is pre-cured at 30-40℃ for 10-20 minutes, and then heated to 50-70℃ at a heating rate of 4-6℃ / min and held for 20-30 minutes. Step S3, Fragrance Microcapsule Layer Coating: After mixing all the raw materials for the fragrance microcapsule layer evenly, add them to a high-speed shear emulsifier and stir at 1000-1500 r / min for 40-60 min to form a uniform slurry; use a precision positioning spraying equipment to adaptively adjust the spraying amount according to the texture depth of the trendy toy, apply it to the surface of the primer layer with a pressure of 0.2-0.4 MPa, and dry at 50-60℃ for 25-35 min; Step S4, Finished Product Post-processing: Place the trendy toy in a constant temperature and humidity chamber at 25℃ and 50%RH for 24 hours to mature. After passing the appearance inspection, friction fragrance release test, and safety performance test, it is packaged to obtain the finished product.