A calming, reparative, and sunscreen mask and method of making same

Abstract

This invention discloses a calming, repairing, and sun-protective mask and its preparation method, relating to the field of mask technology. The mask includes a mask body and ear loops. The mask body, from the outside to the inside, comprises an outer layer, a sun-protective layer, a barrier layer, and an antibacterial hydrophilic repair layer. The antibacterial hydrophilic repair layer has a split structure, including two separate left and right substrates, with a cavity between the two substrates corresponding to the mouth and nose that exposes the barrier layer. Repair microcapsules are loaded on the repair layer, with the wall material being a composite wall material of temperature-sensitive and friction-sensitive materials, and the core material being a skin-care active composition. This invention achieves precise, zoned skin care and inhalation safety through its split structure and mouth / nose cavity, and achieves long-lasting skin care through dual sustained-release microcapsules. The mask of this invention is comfortable and safe to wear, combining sun protection, skin care, and antibacterial functions, effectively solving the "mask face" problem.

Description

Technical Field

[0001] This invention relates to the field of mask technology, and in particular to a calming, repairing, and sun-protective mask and its preparation method. Background Technology

[0002] Existing molded masks are mostly simple derivatives of bras, offering only basic coverage without sophisticated design for facial sun protection, humidity and heat irritation, and long-term wearing comfort. Traditional masks suffer from the following drawbacks: poor support, easily sticking to the mouth and smudging makeup; prolonged wear compresses the skin, causing "mask face," which is harmful to facial skin; limited functionality and lack of synergy, with current technologies simply combining sun protection, cooling, and moisturizing functions, each component acting independently, failing to provide a systematic solution for the complex scenario of "sun protection + humid and hot environment irritation"; repairing ingredients struggle to exert their effects stably and for a long time, as conventional spraying and padding processes simply attach skincare ingredients to the fiber surface, which are easily lost or deactivated by friction and humid and hot environments, failing to achieve long-term repair; and the definition of "soothing and repairing" is vague and lacks technical support, with many products remaining at the level of promotional concepts, failing to clearly define the core active ingredients and mechanisms of action, and lacking objective efficacy verification data.

[0003] Therefore, developing a calming and repairing sunscreen mask with a reasonable structure, synergistic functions, long-lasting repair, and comfortable wearing has significant market value and practical significance. Summary of the Invention

[0004] To address the problems existing in the prior art, the present invention aims to provide a calming and repairing sun protection mask and its preparation method. Through a unique layered structure design and functional synergy, it achieves a system integration of external protection, internal repair, and high comfort, solving the problems of existing masks having single function, poor support, and easy loss of repairing components.

[0005] This invention provides the following technical solution: This invention provides a calming, repairing, and sun-protective mask, comprising a mask body and hanging straps disposed on both sides of the mask body. The mask body comprises, from the outside to the inside, the following components: Outer layer; A sun protection layer is disposed on the inner side of the outer layer and is loaded with sun protection functional ingredients; A barrier layer, laminated to the inner side of the sun protection layer, is made of water-repellent nylon nonwoven fabric. An antibacterial hydrophilic repair layer is disposed inside the barrier layer and is made of hydrophilic fibers, on which repair microcapsules are loaded. The antibacterial hydrophilic repair layer has a split structure, including two separate left and right substrates, which correspond to the left and right cheek areas of the human body when wearing a mask, respectively. The two substrates form a cavity between the mouth and nose that exposes the barrier layer. The wall material of the repair microcapsule is a composite wall material of thermosensitive material and friction-sensitive material, and the core material is a first skin care active composition. The composite wall material is used to initiate the initial release under the action of body temperature by the thermosensitive material and to initiate the secondary release under the action of friction during wearing, so as to achieve long-term and controllable sustained release of the first skin care active composition.

[0006] Preferably, the outer layer is made of lily yarn.

[0007] Preferably, the weight of the lily yarn is 20-35 g / m². 2 .

[0008] Preferably, the lily yarn is composed of fibers with irregular cross-sections, and the fiber surface forms a micro-uneven structure. When light is incident, the micro-structure induces uniform diffuse reflection and multiple refractions, giving the outer layer a soft matte texture and a shimmering, watery, skin-like visual effect. At the same time, the irregular fiber structure of the lily yarn gives the outer layer a good soft touch and breathability, and it is firmly bonded to the inner sun protection layer. Without affecting the stability of the multi-layer structure, it forms effective physical protection for the sun protection layer, achieving a synergistic unity of protective function and visual aesthetics.

[0009] Furthermore, the sun protection layer is made of polypropylene nonwoven fabric that has been treated with a finishing liquid containing ultraviolet absorbers.

[0010] Preferably, the ultraviolet absorber is selected from at least one of benzophenone ultraviolet absorbers, benzotriazole ultraviolet absorbers, triazine ultraviolet absorbers, and cinnamic acid ester ultraviolet absorbers. Preferably, the benzophenone ultraviolet absorber is selected from benzophenone-3 and benzophenone-4; the benzotriazole ultraviolet absorber is 2-(2'-hydroxy-5'-methylphenyl)benzotriazole; the triazine ultraviolet absorber is 2,4,6-tris(2'-hydroxy-4'-butoxyphenyl)-1,3,5-triazine; and the cinnamic acid ester ultraviolet absorber is ethylhexyl methoxycinnamate.

[0011] Preferably, the dispersant is selected from at least one of sodium polyacrylate, polyethylene glycol, sodium dodecyl sulfate, and Tween-80.

[0012] The polypropylene nonwoven fabric has a basis weight of 30-50 g / m². 2 .

[0013] Furthermore, to further enhance the sun protection effect, the finishing liquid also contains modified mineral sunscreen powder. This modified mineral sunscreen powder is made from a sunscreen matrix that has undergone surface modification with polyols or modified silk fibroin. The sunscreen matrix is ​​selected from at least one of nano-zinc oxide and nano-titanium dioxide. The modified mineral sunscreen powder not only provides physical sun protection but also acts as a white pigment, giving the sunscreen layer good whiteness and coverage, making the mask more aesthetically pleasing. Simultaneously, the surface modification not only inhibits the photocatalytic activity of nano-zinc oxide and titanium dioxide, preventing them from burdening the skin, but also improves the adhesion and dispersibility of the powder on the nonwoven fibers. The polyol modification also imparts a cooling sensation upon contact, while the modified silk fibroin enhances its binding force with the fibers.

[0014] Preferably, the particle size of the sunscreen matrix is ​​20-50 nm, and the crystal form is rutile or hexagonal.

[0015] Preferably, the polyol is selected from one or more of xylitol, erythritol, and sorbitol; the modified silk fibroin is polyethylene glycol modified silk fibroin.

[0016] Preferably, the finishing liquid comprises the following components by mass percentage: 5%-15% modified mineral sunscreen powder, 2%-8% ultraviolet absorber, 0.5%-2% dispersant, 0.5%-5% binder, 0.5%-2% crosslinking agent, and the balance being solvent. The solvent is water or ethanol.

[0017] The modified mineral sunscreen powder is prepared by the following method: (1) Disperse the sunscreen base in anhydrous ethanol, with the solid content controlled at 10%-20%, and ultrasonically disperse it for 30-60 minutes at a power of 300-500W to ensure that the powder is fully dispersed.

[0018] (2) Add a surface modifier, the amount of which is 5%-20% of the mass of the sunscreen substrate. Stir and react at 60-80℃, preferably 65-75℃ for 2-4 hours to allow the surface modifier to fully coat the surface of the sunscreen substrate.

[0019] (3) After the reaction is completed, centrifuge at 3000-5000 rpm for 10-20 minutes. The resulting solid precipitate is washed with anhydrous ethanol 3-5 times, then vacuum dried at 40-60℃ for 12-24 hours. Finally, it is ground through a 200-400 mesh sieve to obtain the modified mineral sunscreen powder.

[0020] Preferably, the sunscreen layer is prepared by the following method: A1. Preparation of the sunscreen layer finishing solution: Add the dispersant to the solvent and stir at 200-500 rpm for 10-20 minutes until completely dissolved. Then, while stirring, add the modified mineral sunscreen powder and increase the stirring speed to 500-1000 rpm, continuing to stir for 30-60 minutes. Subsequently, add the ultraviolet absorber and continue stirring at 300-500 rpm for 30-60 minutes to obtain a mixture. Place the mixture in an ultrasonic disperser and ultrasonically disperse it for 20-40 minutes at a power of 300-600W and a frequency of 20-40kHz to fully disperse the powder and form a uniform and stable suspension. Let it stand for 2-4 hours to eliminate air bubbles, and then filter it through a 200-400 mesh sieve to remove undispersed particles, obtaining the sunscreen layer finishing solution.

[0021] A2. Immerse the polypropylene nonwoven fabric in the above finishing solution for 1-5 minutes to ensure the nonwoven fabric fully absorbs the finishing solution. Remove excess liquid by squeezing with a rolling mill, controlling the rolling mill pressure at 0.2-0.5 MPa, to achieve a roll-off rate of 70%-90%.

[0022] A3. The impregnated polypropylene nonwoven fabric is first pre-dried at 60-80℃ for 2-5 minutes to remove most of the moisture, and then baked at 100-130℃ for 1-3 minutes to allow the sun protection functional ingredients to adhere to the fiber surface.

[0023] Preferably, in step A3, the baking process further includes washing the baked polypropylene nonwoven fabric with water at 40-50℃ for 2-5 minutes, and then drying it at 80-100℃ for 2-5 minutes to remove unfixed free sunscreen components and crosslinking agent residues, thereby improving safety and adhesion.

[0024] Preferably, the barrier layer is made of nylon nonwoven fabric treated with a water-repellent agent.

[0025] Preferably, the basis weight of the nylon nonwoven fabric is 35-45 g / m². 2 .

[0026] The water-repellent agent consists of the following components: 10-30 g / L of fluorinated water-repellent agent, 1-5 g / L of crosslinking agent, 0.5-2 g / L of penetrant, and the balance being water.

[0027] The fluorinated water repellent is selected from at least one of perfluoroalkyl acrylate copolymers and perfluoroalkyl ethyl acrylate copolymers.

[0028] The crosslinking agent is selected from at least one of blocked isocyanate and melamine resin, and is used to promote the crosslinking of water repellent on the fiber surface to form a film and improve wash resistance.

[0029] The penetrant is selected from at least one of fatty alcohol polyoxyethylene ether and sodium alkyl sulfonate, which helps the water repellent to penetrate evenly into the fiber.

[0030] The barrier layer is prepared by the following method: B1. At room temperature, add the penetrant to water according to the specified ratio and stir at 200-300 rpm for 5-10 minutes until completely dissolved. Then, slowly add the fluorinated water-repellent agent while stirring, and continue stirring for 10-15 minutes. Finally, add the crosslinking agent and continue stirring for 10-15 minutes to ensure that all components are thoroughly mixed. After preparation, let stand for 15-30 minutes to defoam before use.

[0031] B2. Immerse the nylon nonwoven fabric in the above-mentioned water-repellent finishing solution for 1-3 minutes to ensure the nonwoven fabric fully absorbs the finishing solution. After immersion, remove excess liquid by squeezing with a roller, controlling the roller pressure at 0.3-0.5 MPa to achieve a pick-up rate of 65%-80%.

[0032] B3. After impregnation, the nylon nonwoven fabric enters the drying and baking process. First, it is pre-dried at 80-100℃ for 2-4 minutes to remove most of the moisture; then it is baked at 160-180℃ for 1-3 minutes. During the baking process, the fluorinated water-repellent agent undergoes a cross-linking reaction on the fiber surface, forming a strong water-repellent film layer, significantly reducing the surface energy of the nylon fibers and achieving a long-lasting water-repellent effect. After baking, it is naturally cooled to room temperature to obtain a water-repellent barrier layer material.

[0033] Furthermore, the hydrophilic fibers of the antibacterial hydrophilic repair layer include chitosan fibers, which account for 30%-60% of the total mass of the hydrophilic fibers. The chitosan fibers can effectively inhibit bacterial growth in the humid and hot environment inside the mask. The antibacterial hydrophilic repair layer also includes other hydrophilic fibers accounting for 40%-70% of the total mass of the hydrophilic fibers.

[0034] Preferably, the other hydrophilic fibers are selected from at least one of viscose fiber, cotton fiber, lyocell fiber, chitosan fiber, and modified polyester fiber.

[0035] Furthermore, the temperature-sensitive material is selected from one of phase change wax and temperature-sensitive polyurethane, with a phase change temperature of 35-38℃, corresponding to the temperature rise range of human skin when wearing a mask. When the skin temperature rises, the temperature-sensitive material undergoes a phase change or softens, initiating the initial release of the microcapsules. The friction-sensitive material is selected from one of modified chitosan and polyurea resin. During mask wearing, the mask generates micro-friction with the skin, and this friction causes the friction-sensitive material to gradually break down, achieving a secondary release. This dual release mechanism of "temperature-sensitive + friction-sensitive" allows for the continuous and controllable release of active ingredients during wear, achieving long-lasting skin care. The repair microcapsules have an average particle size of 5-15μm and a loading of 15%-25%.

[0036] Furthermore, the first skincare active composition comprises the following components in parts by weight: 3-8 parts of 1,3-propanediol; 2-5 parts glycerin; Butanediol 2-5 parts; 1,2-Pentanediol 1-3 parts; Dipotassium glycyrrhizate 0.1-1 part; Sodium hyaluronate 0.1-1 part; 0.1-5 parts of active additive; 70-90 parts water; The active additive is selected from at least one of acetylated sodium hyaluronate, hydrolyzed sodium hyaluronate, sodium hyaluronate crosspolymer, ethylhexylglycerin, xanthan gum, panthenol, asiaticoside, and centella asiatica extract.

[0037] Furthermore, the mask also includes a dot matrix support layer disposed inside the antibacterial hydrophilic repair layer. The surface of this support layer facing away from the antibacterial hydrophilic repair layer has a dot matrix structure composed of multiple micro-protrusions, forming dot-like support between the mask and the skin. This transforms surface contact into point contact, significantly reducing pressure per unit area and preventing prolonged pressure on the skin. Simultaneously, the micro-protrusions create tiny gaps between the mask and the skin, forming airflow channels, improving microcirculation and reducing stuffiness. Secondly, the micro-protrusions can deliver the first skin-care active composition released by the antibacterial hydrophilic repair layer to the skin. In addition, the dot matrix support layer prevents the inner layer of the mask from directly adhering to the skin, avoiding friction and makeup smudging.

[0038] Furthermore, the material of the lattice support layer is a thermoplastic elastomer or silicone rubber with a hardness of Shore A 20-40; the lattice density of the lattice structure is 15-35 dots / cm³. 2 The micro-protrusion has a height of 0.2-1.2 mm and a diameter of 0.2-1.0 mm, and its top end is an arc surface.

[0039] In some embodiments, the lattice support layer is formed directly on the side of the antibacterial hydrophilic repair layer facing away from it. Specifically, thermoplastic elastomer or silicone rubber material is deposited on the surface of the antibacterial hydrophilic repair layer in the form of micro-dots, and after curing, forms a micro-protrusion structure integrated with the antibacterial hydrophilic repair layer. In this solution, there is no interfacial gap between the micro-protrusions and the repair layer, and the skin-care active ingredients released by the repair layer can be directly delivered to the skin through the micro-protrusions. Preferably, the lattice support layer is formed directly on the side of the antibacterial hydrophilic repair layer facing away from it using one of the following processes: micro-jet printing, micro-injection molding, printing, or 3D printing.

[0040] In other embodiments, the lattice support layer is an independent microlattice film. In this approach, a film with a micro-protruding lattice structure can be independently prepared, and then this film is laminated to the inner side of the antibacterial hydrophilic repair layer by edge fixing. In this scheme, the lattice support layer includes a film substrate and a lattice structure disposed on the film substrate. The film substrate has multiple through-holes, and the through-holes are staggered with the micro-protrusions, allowing the active ingredients released by the antibacterial hydrophilic repair layer to be directly conducted to the skin surface through the through-holes by the lattice support layer. Simultaneously, the structure of the film substrate corresponds to the antibacterial hydrophilic repair layer; specifically, it includes two separate left and right substrates, corresponding to the left and right cheek areas of the human body when wearing a mask, respectively. A cavity corresponding to the mouth and nose exposing the barrier layer is formed between the left and right substrates. Furthermore, in this scheme, there is a gap between the lattice support layer and the antibacterial hydrophilic repair layer, so that the antibacterial hydrophilic repair layer is in a non-compression state when the micro-protrusions contact the skin. In addition, a second skin care active composition can be loaded on the dot matrix support layer. The second skin care active composition can be loaded on the surface of the micro-protrusion, the surface of the film substrate, or the inner wall of the through hole. During the wearing process, it is released directly through the contact between the micro-protrusion and the skin, or it can be mixed with the first skin care active composition through the through hole and act together on the skin to achieve the synergistic effect of the dual-layer skin care system.

[0041] The parameters of the through hole can be optimized as needed. Preferably, the diameter of the through hole is 0.5-1.0 mm, and the opening ratio is 40%-60%, which ensures good air permeability and provides sufficient support for the micro-protrusions; the shape of the through hole can be circular, elliptical, or polygonal.

[0042] Preferably, the second skincare active composition comprises the following components in parts by weight: 2-6 parts of 1,3-propanediol; 1-4 parts glycerin; Butanediol 1-4 parts; Panthenol 0.5-3 parts; Ceramide NP 0.1-1 part; Sodium hyaluronate 0.05-0.5 parts; Dipotassium glycyrrhizate 0.05-0.5 parts; Centella asiatica extract 0.1-2 parts; 70-90 parts water.

[0043] Preferably, the second skincare active composition further comprises 0.1-5 parts of an active additive, wherein the active additive is selected from at least one of asiaticoside, bisabolol, purslane extract, acetylated sodium hyaluronate, trehalose, menthol, and vitamin E.

[0044] Furthermore, the calming, repairing, and sun-protective mask is a three-dimensional mask.

[0045] Secondly, the present invention provides a method for preparing the above-mentioned calming and repairing sun-protective mask, which includes the following steps: S2. Two nonwoven fabrics are made of hydrophilic fibers containing intrinsic antibacterial materials; S3. Stack the outer layer, sun protection layer, and barrier layer in sequence. Place two pieces of non-woven fabric on the side of the barrier layer away from the sun protection layer, with the two pieces of non-woven fabric symmetrical about the barrier layer. Connect and fix the outer layer, sun protection layer, barrier layer, and non-woven fabric to form the mask body. The barrier layer part corresponding to the gap area between the two pieces of non-woven fabric corresponds to the mouth and nose of the human body when wearing. S4. Spray the liquid containing repair microcapsules onto two pieces of non-woven fabric to form the mask body; S5. Connect the mask body to the hanging strap.

[0046] Further, in step S1, the sunscreen layer is prepared by the following method: The polypropylene nonwoven fabric is immersed in a finishing solution containing ultraviolet absorber for 1-5 minutes, squeezed until the roll-off rate reaches 70%-90%, pre-dried at 60-80℃ for 2-5 minutes, and then baked at 100-130℃ for 1-3 minutes.

[0047] Further, in step S1, the barrier layer is prepared by the following method: The nylon nonwoven fabric is immersed in a water-repellent finishing agent for 1-3 minutes, squeezed until the roll-off rate reaches 65%-80%, pre-dried at 80-100℃ for 2-4 minutes, and then baked at 160-180℃ for 1-3 minutes.

[0048] Preferably, in some embodiments, in step S3, the connection fixing adopts a one-time composite method: Hot pressing is performed on the edge areas of the stacked outer layer, sun protection layer, barrier layer and two non-woven fabrics to connect and fix the outer layer, sun protection layer, barrier layer and two non-woven fabrics in the edge areas, while the middle area remains unpressed. The hot pressing temperature is 100-130℃, the pressure is 0.1-0.3MPa, and the time is 3-10 seconds.

[0049] Preferably, in some embodiments, in step S3, the connection fixing adopts a step-by-step composite method: First, the overlapping outer layer, sun protection layer and barrier layer are hot-pressed together at the edge area to connect the outer layer, sun protection layer and barrier layer at the edge area to form a composite; The two pieces of non-woven fabric are then connected and fixed to the edge area of ​​the barrier layer on the side away from the sun protection layer by means of glue or ultrasonic spot welding, while the main body in the middle remains free.

[0050] Preferably, the ultrasonic spot welding has a frequency of 15kHz, a power of 300W, and a welding time of 0.5-1 second.

[0051] Further, in step S4, the content of repair microcapsules in the spray solution is 3wt%-8wt%; the spray pressure is 0.1-0.3MPa, the spray flow rate is 0.3-0.8mL / s, and the load on each nonwoven fabric is 0.5-1.2mL.

[0052] Preferably, the spraying uses a micron-level atomizing nozzle, with atomized particles controlled at 30-80μm, ensuring the liquid is evenly distributed on the non-woven fabric. During spraying, the mask can be fixed on a conformal mold, and spraying occurs from the inside, with the water-repellent properties of the barrier layer preventing the liquid from penetrating to the outer layer.

[0053] In some embodiments, after step S4, the method further includes: preparing a lattice support layer by micro-jet printing, micro-injection molding, printing or 3D printing processes, and connecting and fixing the lattice support layer to the side of the nonwoven fabric away from the barrier layer after spraying.

[0054] In some other embodiments, step S4 is followed by: preparing a lattice support layer by micro-jet printing, micro-injection molding, printing or 3D printing processes; immersing the lattice support layer in a second skin care active composition; drying the lattice support layer to load the second skin care active composition onto the lattice support layer; and then connecting and fixing the lattice support layer to the side of the nonwoven fabric away from the barrier layer after spraying.

[0055] Preferably, in step S5, the hanging rope is connected to the mask body by adhesive bonding.

[0056] Preferably, the calming and repairing sun protection mask further includes a packaging step after its preparation is completed.

[0057] Through the above design, the present invention has the following effects: This invention utilizes a split-structure design of the antibacterial and hydrophilic repair layer to create cavities corresponding to the mouth and nose of the exposed barrier layer. This ensures that skincare active ingredients are only loaded onto the left and right cheek areas, keeping the mouth and nose areas dry and eliminating the risk of liquid inhalation. It also prevents the outer layer from becoming damp and causing makeup smudging due to serum soaking. Regarding skincare efficacy, the microcapsule design using a temperature-sensitive and friction-sensitive composite wall material achieves a dual sustained-release mechanism for active ingredients. Initial release is initiated when body temperature rises, and a secondary release is triggered by micro-friction during wear, continuously releasing active ingredients for long-lasting repair. In terms of antibacterial performance, the intrinsic antibacterial properties effectively inhibit bacterial growth on the inside of the mask. Regarding the manufacturing process, a "stepwise composite + reverse spray" process is adopted, placing the microcapsule loading step after hot-pressing composite to avoid damage to the microcapsules due to high temperature and pressure.

[0058] Furthermore, this invention utilizes the micro-protrusions and lattice structure of the lattice support layer to create dot-like support and air gaps between the mask and the skin, transforming surface contact into point contact and significantly reducing skin pressure. Simultaneously, the gaps between the micro-protrusions form micro-airflow channels, improving the humid and hot microcirculation. This works synergistically with the antibacterial and hydrophilic repair layer to effectively solve the "mask face" problem caused by traditional masks. In addition, the lattice support layer can also load a second skincare active composition, forming an "immediate + long-lasting" dual-layer skincare system with the first skincare active composition. Attached Figure Description

[0059] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0060] Figure 1 This is a physical image of the calming, repairing, and sun-protective mask provided in Embodiment 1 of the present invention.

[0061] Figure 2 This is a schematic diagram of the mask body structure provided in Embodiment 1 of the present invention.

[0062] Figure 3 This is an internal view of the mask body provided in Embodiment 1 of the present invention.

[0063] Figure 4 This is a schematic diagram of the mask body structure provided in Embodiment 3 of the present invention.

[0064] Figure 5 This is a schematic diagram of the mask body structure provided in Embodiment 4 of the present invention.

[0065] Figure 6 This is a schematic diagram of the lattice support layer structure provided in Embodiment 4 of the present invention.

[0066] The markings in the diagram are as follows: 1-Outer layer; 2-Sunscreen layer; 3-Barrier layer; 4-Antibacterial and hydrophilic repair layer; 5-Dot matrix support layer; 501-Micro protrusion; 502-Film substrate; 503-Through hole. Detailed Implementation

[0067] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0068] It should be understood that, when used in this specification and the appended claims, the terms “comprising” and “including” indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0069] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0070] The raw materials and instruments used in the embodiments of this invention are as follows: Outer layer: Lily yarn (25g / m²) 2 ); Sunscreen layer substrate: Polypropylene nonwoven fabric (25g / m²) 2 ); Barrier layer matrix: Nylon nonwoven fabric (20g / m²) 2 ); Water-repellent finishing agent: Fluoride water-repellent agent (TG-5801); Hydrophilic fibers: chitosan fiber (degree of deacetylation ≥85%, molecular weight 200,000 Da), viscose fiber (1.5D×38mm); Sunscreen ingredients: Nano zinc oxide (30nm, surface modified with glycerol), nano titanium dioxide (20nm, surface modified with modified silk fibroin), ethylhexyl methoxycinnamate (OMC). Surface modifiers: glycerol (analytical grade), modified silk fibroin (molecular weight 4000 Da); Microcapsule wall materials: phase change wax (phase change temperature 37℃, melting range 36-38℃, melting point 37.2℃), thermosensitive polyurethane (phase change temperature 36℃), modified chitosan (carboxymethyl chitosan, degree of substitution 0.8), polyurea resin; The first skincare active composition ingredients are: 1,3-propanediol, glycerin, butylene glycol, 1,2-pentanediol, dipotassium glycyrrhizate, sodium hyaluronate (molecular weight 1 million Da), panthenol, asiaticoside (purity 98%), and centella asiatica extract (asiaticoside content 10%). Second skincare active composition ingredients: 1,3-propanediol, glycerin, butylene glycol, panthenol, ceramide NP, sodium hyaluronate, dipotassium glycyrrhizate, centella asiatica extract, menthol (food grade). Lattice support layer materials: thermoplastic elastomer (TPE, Shore A 30) and UV-cured liquid silicone rubber (UV-LSR, Shore A 25).

[0071] instrument: Dip mill: Laboratory-sized dip mill (EL-400), with adjustable roll pressure; Hot press laminating machine: Flat plate hot press (YJ-101), temperature range room temperature - 200℃, pressure range 0-0.5MPa; Dispensing machine: Precision dispensing equipment (DSP-300S), minimum dispensing volume 0.001mL; Ultrasonic welding machine: 15kHz (KS-1515), power adjustable from 0-500W; Spray device: micron-level atomizing nozzle (SUE-2A), atomized particles adjustable from 20-100μm, flow rate adjustable from 0.1-1.0mL / s; Contouring mold: Designed based on 3D facial scan data, 3D printed, and features positioning grooves; Scanning electron microscope: JSM-7500F (JEOL), magnification 100,000-500,000x; UV-2600 (Shimadzu) ultraviolet spectrophotometer, wavelength range 200-800nm; In vitro release rate tester: RCZ-6B3, speed adjustable from 10-200rpm, temperature controllable from room temperature to 45℃; Skin moisture meter: Corneometer CM825 (Courage+Khazaka); Skin scratch depth meter: Cutometer MPA580 (Courage+Khazaka); Air permeability tester: YG461E (Ningbo Textile Instrument), differential pressure range 0-500Pa; Artificial skin model: Vitro-Skin (IMS Inc.), used for serum delivery efficiency testing.

[0072] It should be noted that the selection of the above-mentioned raw materials and instruments is merely an illustrative description to help those skilled in the art understand and implement the present invention, and does not constitute a limitation on the scope of protection of the present invention. Those skilled in the art can select equivalent raw materials, equipment, process parameters, etc. for substitution or adjustment according to actual production conditions and product requirements. As long as the technical objectives of the present invention can be achieved, they all fall within the scope of protection of the present invention.

[0073] Example 1 A type of calming, repairing, and sun-protective mask, such as Figure 1 As shown, it includes the mask body and hanging straps located on both sides of the mask body; as Figure 2 As shown, the mask body includes, from the outside to the inside, the following components: Outer layer 1; Sunscreen layer 2 is located inside the outer layer 1 and contains sunscreen ingredients. Barrier layer 3, laminated to the inside of sunscreen layer 2, is made of water-repellent nylon nonwoven fabric; An antibacterial hydrophilic repair layer 4 is disposed inside the barrier layer 3 and is made of hydrophilic fibers, on which repair microcapsules are loaded. The antibacterial and hydrophilic repair layer 4 has a split structure, including two separate left and right substrates, which correspond to the left and right cheek areas of the human body when wearing a mask. The mouth and nose corresponding cavities are formed between the left and right substrates to form an exposed barrier layer. The wall material of the repair microcapsule is a composite wall material of temperature-sensitive and friction-sensitive materials, and the core material is the first skin care active composition.

[0074] Prepare a calming and repairing sun protection mask following these steps: S1. Preparation of the outer layer: Take colored polypropylene nonwoven fabric (25g / m²) 2 Cut according to the 3D mask pattern for later use.

[0075] S2. Preparation of the sunscreen layer: Prepare 1000mL of sunscreen finishing solution with the following formula: 30g ethylhexyl methoxycinnamate, 50g glycerol-modified nano-zinc oxide, 10g dispersant (sodium polyacrylate), 50g waterborne polyurethane adhesive, 5g crosslinking agent aziridine, and deionized water to a final volume of 1000mL. Immerse polypropylene nonwoven fabric in the finishing solution, remove excess liquid by squeezing with a rolling mill (75% residue), pre-dry at 70℃ for 3 minutes, then bake at 130℃ for 2 minutes, wash with water at 45℃ for 3 minutes, and finally dry at 90℃ for 4 minutes to obtain the sunscreen layer.

[0076] S3. Preparation of the barrier layer: Take nylon nonwoven fabric (20g / m²) 2The sample is immersed in a fluorine-containing water-repellent finishing solution (concentration 2wt%), and excess liquid is removed by rolling mill extrusion with a roll-out rate of 70%. It is then dried at 170℃.

[0077] S4. Preparation of the repair layer substrate: Chitosan fibers and viscose fibers are mixed at a mass ratio of 40:60 and hydroentangled to form a hydrophilic nonwoven fabric (35 g / m²). 2 It is cut into two pieces, left and right, each piece measuring 60mm × 80mm.

[0078] S5. Preparation of Repair Microcapsules: Microcapsules with phase change wax (phase change temperature 37℃) / modified chitosan as the wall material were prepared by composite coagulation method, and the core material was the first skin care active composition. The formulation of the first skin care active composition (parts by weight): 5 parts 1,3-propanediol, 3 parts glycerin, 3 parts butylene glycol, 2 parts 1,2-pentanediol, 0.5 parts dipotassium glycyrrhizate, 0.5 parts sodium hyaluronate, 1 part panthenol, 0.5 parts asiaticoside, and 84.5 parts water.

[0079] Preparation method: 5g of phase change wax was dissolved in 20mL of dichloromethane, and 10g of the first skin care active composition was added. The mixture was emulsified and dispersed to obtain the oil phase. 3g of modified chitosan was dissolved in 100mL of 2% acetic acid solution, and the pH was adjusted to 4.5 to obtain the aqueous phase. Under stirring conditions (1000rpm), the oil phase was slowly added to the aqueous phase, emulsified for 30min, heated to 40℃ and stirred for 2h to evaporate the solvent. The mixture was filtered, washed, and dried to obtain microcapsules. The average particle size (D50) was determined by laser particle size analyzer to be 10.2μm, and the core material mass fraction (loading) in the microcapsules was 20.5%.

[0080] S6. Stack the outer layer, sun protection layer, and barrier layer sequentially, and place them in a 3D mask hot-press mold. Place two pieces of non-woven fabric alternately on the barrier layer, opposite to the sun protection layer, ensuring the two pieces are symmetrical about the barrier layer. Apply hot-press bonding to the mask frame area (8mm wide), connecting and fixing the outer layer, sun protection layer, barrier layer, and two pieces of non-woven fabric at the edges, while leaving the center unpressed, forming the 3D mask body. Hot-press parameters: temperature 120℃, pressure 0.2MPa, time 5 seconds.

[0081] S7. Disperse the first skincare active composition containing repair microcapsules in deionized water, add 0.5 wt% dispersant (Tween-80), and ultrasonically disperse for 10 minutes to prepare a spray solution. The content of repair microcapsules in the spray solution is 5 wt%. Fix the dry mask body upside down onto a three-dimensional conforming mold. The mold has grooves that match the three-dimensional shape of the mask. Atomize and spray the solution from the inside of the mask using a spraying device. Spray parameters: atomized particles 50 μm, flow rate 0.5 mL / s, pressure 0.2 MPa, spray time 1.6 seconds / piece, substrate loading per piece 0.8 mL (microcapsule loading 20%). During spraying, the water-repellent properties of the barrier layer prevent the solution from penetrating to the outer layer; the solution is only absorbed by the hydrophilic left and right substrate pieces.

[0082] S8. Connecting the hanging straps: Fix the elastic ear loops to the two side frame areas of the mask body by applying adhesive to obtain a calming, repairing, and sun-protective mask.

[0083] Example 2 The only difference between this embodiment and Embodiment 1 is that step S6 is performed using a step-by-step composite method: S6. Stack the outer layer, sun protection layer, and barrier layer sequentially, and place them in a 3D mask hot-press mold. Apply hot-press bonding to the mask frame area (8mm wide). Hot-press parameters: temperature 120℃, pressure 0.2MPa, time 5 seconds. After hot-pressing, the three layers are firmly bonded at the frame to form a composite, with the middle areas of each layer remaining unpressed. Then, connect and fix two pieces of non-woven fabric to the edge area of ​​the barrier layer opposite to the sun protection layer using ultrasonic spot welding. Ultrasonic spot welding parameters: frequency 15kHz, power 300W, welding time 0.8 seconds. After spot welding, the main body of the two pieces of non-woven fabric remains in a free and fluffy state, forming a cavity in the middle corresponding to the mouth and nose where the barrier layer is exposed, thus obtaining a dry mask body.

[0084] The remaining structure and steps are the same as in Example 1.

[0085] Example 3 Based on Example 1, the mask body of Example 3 also includes a dot matrix support layer 5 (see Example 3). Figure 4 The lattice support layer 5 is disposed inside the antibacterial hydrophilic repair layer 4, and its surface facing away from the antibacterial hydrophilic repair layer has a lattice structure composed of multiple micro-protrusions 501.

[0086] The preparation process also includes the following steps: S9. Fabrication of the lattice support layer: Using UV-curable liquid silicone rubber (UV-LSR, hardness Shore A25) as raw material, it is directly formed on the inner surface of the antibacterial hydrophilic repair layer 4 through micro-jet printing process.

[0087] UV-curable liquid silicone rubber (UV-LSR) is loaded into the cartridge of the microjet printer, with the cartridge temperature controlled at 25°C. Printing parameters: nozzle temperature 25°C, platform temperature 25°C, printing speed 15 mm / s, layer thickness 0.1 mm. Micro-protrusion design parameters: height 0.8 mm, bottom diameter 0.6 mm, top hemispherical arc surface, dot density 25 dots / cm². 2 They are arranged in rows and columns.

[0088] After printing, immediately irradiate with a UV lamp (wavelength 365 nm, power 100 W) for 30 seconds to allow the silicone rubber to fully cure at room temperature, forming a micro-protrusion structure integrated with the antibacterial hydrophilic repair layer 4.

[0089] The remaining steps are the same as in Example 1, and a calming, repairing, and sun-protective mask is obtained.

[0090] Example 4 Based on Example 1, the mask body of Example 3 also includes a dot matrix support layer 5 (see Example 3). Figure 5 and Figure 6 A lattice support layer 5 is disposed inside the antibacterial hydrophilic repair layer 4, and its surface facing away from the antibacterial hydrophilic repair layer 4 has a lattice structure composed of multiple micro-protrusions 501. In this embodiment, the lattice support layer 5 is disposed as an independent layer, which includes a thin film substrate 502 and micro-protrusions 501 disposed on the thin film substrate 502. The thin film substrate 502 is also provided with multiple through holes 503, which are staggered with the micro-protrusions 501. The lattice support layer 5 is also loaded with a second skin care active composition. The second skin care active composition is directly loaded on the surface of the lattice support layer 5 and the inner wall of the through holes 503. When worn, it is released instantly through point contact with the skin, complementing the long-acting sustained release of the repair layer microcapsules.

[0091] The preparation process also includes: S9. Fabrication of the lattice support layer: A micro-injection molding process was used to prepare a film with a lattice structure of micro-protrusions 501 and through-pores 503, based on thermoplastic elastomer (TPE, Shore A 30). Film dimensions: matched to the contour of the antibacterial hydrophilic repair layer, thickness 0.3 mm. Micro-protrusion design parameters: height 0.8 mm, bottom diameter 0.6 mm, top hemispherical arc surface, lattice density 25 protrusions / cm². 2 A circular through-hole 503 with a diameter of 0.8 mm and an opening ratio of 45% is provided on the film substrate 502. Micro-injection molding parameters: mold temperature 40℃, injection pressure 60MPa, holding time 2 seconds, cooling time 10 seconds.

[0092] The lattice support layer was immersed in the second skincare active composition, removed, drained, and dried at 40℃ for 10 min. The formulation of the second skincare active composition (parts by weight): 4 parts 1,3-propanediol, 2.5 parts glycerin, 2.5 parts butylene glycol, 1.5 parts panthenol, 0.5 parts ceramide NP, 0.2 parts sodium hyaluronate, 0.2 parts dipotassium glycyrrhizate, 1 part Centella asiatica extract, 0.05 parts menthol, and 87.55 parts water. After loading, the second composition adhered to the micro-protrusion surface, the film substrate surface, and the inner wall of the pores, with a loading amount of 0.3 mg / cm². 2 .

[0093] S10. The lattice support layer 5 loaded with the second composition is bonded to the inner edge of the antibacterial hydrophilic repair layer 4 via edge dispensing, ensuring that the lattice support layer 5 covers the inner side of the antibacterial hydrophilic repair layer 4, with the micro-protrusions 501 facing away from the antibacterial hydrophilic repair layer 4. Medical pressure-sensitive adhesive is used, applied continuously along the edge of the film, with an adhesive line width of 1 mm. After bonding, due to the presence of the micro-protrusions, a space naturally forms between the lattice support layer 5 and the antibacterial hydrophilic repair layer 4, ensuring that the antibacterial hydrophilic repair layer is in a non-compression state when the micro-protrusions contact the skin. The remaining steps are the same as in Example 1, resulting in a soothing and repairing sunscreen mask.

[0094] Example 5 Based on Example 4, the mass ratio of chitosan fiber to viscose fiber in the antibacterial hydrophilic repair layer was adjusted to 50:50.

[0095] Example 6 Based on Example 4, the micro-protrusion parameters of the lattice support layer and the parameters of the thin film substrate were changed: the micro-protrusion height was 0.2 mm, and the lattice density was 15 particles / cm². 2 The through hole diameter is 0.5mm, and the open area ratio is 35%.

[0096] Example 7 Based on Example 4, the micro-protrusion parameters of the lattice support layer and the parameters of the thin film substrate were changed: the micro-protrusion height was 1.2 mm, and the lattice density was 35 particles / cm². 2 The through hole diameter is 1.5mm, and the opening rate is 60%.

[0097] Comparative Example 1 The selected commercially available 3D sun protection mask has a three-layer structure (outer layer for sun protection, middle layer for filtration, and inner layer for skin-friendliness), no separate repair layer, no skin care function, no dot matrix support, and a UPF value of 48.

[0098] Comparative Example 2 Based on Example 1, the antibacterial hydrophilic repair layer is changed to an integrated structure (one piece, covering the entire inner side of the mask, without mouth and nose cavities), and the rest is the same as in Example 1.

[0099] Comparative Example 3 Based on Example 4, the antibacterial hydrophilic repair layer is changed to an integrated structure (one piece that covers the entire inner side of the mask), and the rest is the same as in Example 4.

[0100] Comparative Example 4 The layer structure of Example 1 was followed, but the preparation process was changed: the repair microcapsules were added to the antibacterial hydrophilic repair layer in step S4, and then all four layers were composited by hot pressing in one step (hot pressing temperature 120°C, pressure 0.2MPa, time 8 seconds), and the rest was the same as in Example 1.

[0101] Comparative Example 5 Based on Example 4, the lattice support layer was replaced with a continuous thin film without through holes (0% porosity), and the rest was the same as in Example 4.

[0102] Comparative Example 6 Based on Example 4, the microcapsule wall material was changed to a single modified chitosan wall material (without temperature-sensitive material). The rest is the same as in Example 4.

[0103] Comparative Example 7 Based on Example 1, the active ingredient loading method was changed: the first skin care active composition (without microcapsules) was directly formulated into a liquid and loaded onto the left and right substrates by spraying, with the loading amount being the same as in Example 1 (0.8 mL per substrate). The remaining steps were the same as in Example 1.

[0104] It should be noted that the first skincare active composition in this comparative example was not encapsulated in microcapsules, but directly adhered to the surface of the hydrophilic fiber and the gaps between the fibers, in order to compare and verify the protective effect of microcapsules on active ingredients and the sustained-release effect.

[0105] To illustrate the technical effects of the above embodiments and comparative examples, the following effect tests were conducted: (1) Microcapsule integrity test The antibacterial hydrophilic repair layer of the masks from each embodiment and comparative example was sampled (cut area sampling, avoiding edges). Ten fields of view were randomly selected under 500x magnification using a scanning electron microscope to calculate the microcapsule integrity rate (number of intact capsules / total number of capsules × 100%). The criteria for judging microcapsule rupture were: obvious cracks, collapse, or leakage of contents from the capsule wall. The results are shown in Table 1.

[0106] Table 1 Microcapsule Integrity Rate As shown in Table 1, the stepwise composite + reverse spraying process used in this invention can effectively protect the microcapsules, with an integrity rate of >95%; while the traditional hot-pressing composite process is prone to causing a large number of microcapsules to rupture.

[0107] Sunscreen performance test The ultraviolet protection factor (UPF) and UVA transmittance of each sample of the mask were tested using an ultraviolet spectrophotometer according to GB / T 18830-2009 "Evaluation of Ultraviolet Protection Performance of Textiles". The results are shown in Table 2.

[0108] Table 2 Sunscreen performance test results The results show that the samples of this invention have excellent sun protection performance, with UPF values ​​all greater than 50, meeting the standard of "anti-ultraviolet products".

[0109] Antibacterial performance test The inhibition rates of each sample against Staphylococcus aureus (ATCC 6538) and Escherichia coli (ATCC 8739) were tested according to GB / T 20944.3-2008 "Evaluation of antimicrobial properties of textiles - Part 3: Shaking method". Before testing, the samples were pretreated at 37℃ and 95% humidity for 4 hours to simulate a hot and humid environment. The results are shown in Table 3.

[0110] Table 3 Antibacterial performance test results The results showed that the chitosan fiber-containing sample of the present invention (chitosan content 40%-50%) had a significant inhibitory effect on both bacteria, with an inhibition rate of >90%.

[0111] Microcapsule release performance test Simulated wearing conditions: constant temperature of 37℃, with slight friction applied (frequency 1Hz, amplitude 5mm, simulating facial micro-movements). The sample was placed in the release medium (pH 5.5 phosphate buffer), and samples were taken periodically to determine the cumulative release rate of the characteristic ingredient (1,2-pentanediol) in the first skin care active composition. The results are shown in Table 4.

[0112] Table 4 Microcapsule release rate The results show that the microcapsules of temperature-sensitive and friction-sensitive composite wall materials used in this invention (Examples 1-4) exhibit good sustained-release characteristics, with continuous release over 8 hours and a cumulative release rate of about 80%; while the microcapsules of single wall materials (Comparative Example 6) release nearly 90% within 2 hours, which is a "burst release" type and has a poor sustained-release effect; Comparative Example 7, which does not contain microcapsules, has no sustained-release effect.

[0113] Wearing comfort test We recruited 30 volunteers (aged 25-45, half male and half female, no facial skin diseases) to wear various sample 3D masks for 4 hours (normal indoor activities, including talking and light walking), and evaluated them based on the following indicators: Facial indentation depth: Immediately after wearing the product, the depth of the most obvious indentation on the cheek (mm) was measured using a skin scratch depth meter. Skin moisture increase rate: The skin moisture content of the cheeks was measured with a skin moisture meter before and after wearing the product. The increase rate was calculated as (after wearing - before wearing) / before wearing × 100%. Degree of contact with mouth: Subjective evaluation by volunteers (1-5 points, 1 point for no contact at all, 5 points for severe contact with mouth). Makeup smudge level: 20 female volunteers wore light makeup (foundation + blush) and then professional makeup artists evaluated the degree of makeup smudges (1-5 points, 1 point for no makeup smudges, 5 points for severe makeup smudges). Breathability: The air permeability of the mask (mm / s) was tested according to GB / T 5453-1997.

[0114] The results are shown in Table 5.

[0115] Table 5. Results of Wearing Comfort Test The results show that the lattice structure combined with the antibacterial hydrophilic repair layer can effectively reduce skin pressure, improve the microcirculation of moisture and heat, and solve the problems of mouth contact and makeup smudging. Simultaneously, the perforations effectively maintain breathability. It should be noted that the GB / T5453 breathability test method mainly measures the ability of airflow to pass vertically through the material body. For samples with a lattice support layer, the micro-protrusion structure generates microscopic turbulence in the vertical direction, therefore the breathability value does not increase monotonically with the opening ratio. However, this test result does not fully reflect the efficiency of moisture and heat exchange during actual wear. Under wearing conditions, the micro-protrusions of the lattice support layer create a three-dimensional gap between the skin and the mask, forming a multi-dimensional airflow channel, effectively promoting the lateral diffusion and exhaust of moist and hot gases. Its actual comfort benefits are superior to the single vertical breathability index. This is also verified by the fact that the skin moisture increase rate in Examples 3, 4, and 7 is lower than that in Example 1 in Table 5.

[0116] Inhalation risk assessment Simulating mouth and nose breathing while wearing the mask, dry filter paper (pre-weighed) was placed on the inside of the mask in the area corresponding to the mouth and nose. The mask was then fixed to an artificial head model and connected to a breathing simulator (frequency 20 breaths / minute, tidal volume 500 mL) for 30 minutes of continuous breathing. The filter paper was then removed and weighed, and the weight gain was calculated. The test sample was a mask loaded with essence. The results are shown in Table 6.

[0117] Table 6 Inhalation Risk Assessment Results The results showed that in Examples 1-3, which had a split antibacterial hydrophilic repair layer (oral and nasal cavity), there was virtually no liquid inhalation in the oral and nasal areas (filter paper weight gain < 3 mg); while in Comparative Examples 2 and 3, which did not have a split structure, there was significant liquid inhalation in the oral and nasal areas, posing a safety hazard.

[0118] (7) Active ingredient delivery efficiency test An artificial skin model (Vitro-Skin) was used, and the model was placed on a constant temperature platform at 37°C. A mask sample was worn, and slight pressure (simulating wearing pressure 2 kPa) and slight friction (frequency 0.5 Hz, amplitude 3 mm) were applied to the model. After 4 hours, the mask was removed, and the content of the common characteristic component (hydroxyascorbic acid) received in the first and second skin-care active compositions on the artificial skin model was extracted. The transfer efficiency was calculated by comparing it with the initial loading of this component in the corresponding examples / comparative examples. The results are shown in Table 7.

[0119] Table 7 Results of Active Ingredient Delivery Efficiency Test The results show that by optimizing the lattice support layer structure and loading the second active composition, the delivery efficiency can be improved while achieving the sustained-release function, thus possessing both "instant" and "sustainable" effects. It should be noted that the lattice support layer of Comparative Example 5 is loaded with the second skincare active composition, and its delivery efficiency comes from the direct contact between the second skincare active composition and the skin; while the delivery efficiency of Examples 4 and 7 is the sum of the first and second skincare active compositions.

[0120] (8) Stability testing (accelerated storage experiment) Test objective: To evaluate the storage stability of the primary skincare active composition in different samples and to verify the protective effect of microcapsules on the active ingredients.

[0121] Test method: In accordance with the "Guidelines for Stability Testing of Cosmetics" and industry practice, accelerated storage experiments were conducted. Mask samples prepared in the same batch were randomly divided into three groups: the 0-minute time group (initial baseline group), the 1-month storage group, and the 3-month storage group, with three replicates in each group.

[0122] Samples from time 0 were tested immediately after preparation: two pieces of the antibacterial hydrophilic repair layer were cut along the edge of the mask, combined, and placed in a stoppered test tube. An appropriate amount of methanol was added, and the samples were ultrasonically extracted for 30 minutes. After filtration and dilution to a fixed volume, the content of the characteristic component (hydroxyasiaticoside) was determined using high-performance liquid chromatography (HPLC). The average value of three parallel samples was used as the initial content baseline.

[0123] The remaining two groups of samples were sealed and placed in a constant temperature and humidity chamber at 40℃±2℃ and 75%±5%RH (relative humidity). After storage for 1 month and 3 months, the samples of the corresponding groups were taken out, and the content of asiaticoside in the antibacterial hydrophilic repair layer was extracted and determined using the same method as the group at time 0. The average value of the three parallel samples was taken as the content after storage.

[0124] Calculate the retention rate of active ingredients: Retention rate (%) = (content after storage / initial content) × 100%.

[0125] The test results are shown in Table 8 below: Table 8. Retention rate of active ingredients (%) under accelerated storage conditions As shown in Table 8, the samples encapsulated with microcapsules exhibited good storage stability under accelerated storage conditions.

[0126] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and these modifications or substitutions should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A calming, repairing, and sun-protective mask, comprising a mask body and hanging straps disposed on both sides of the mask body, characterized in that, The mask body comprises, from the outside to the inside, the following components: Outer layer; A sun protection layer is disposed on the inner side of the outer layer and is loaded with sun protection functional ingredients; A barrier layer, laminated to the inner side of the sun protection layer, is made of water-repellent nylon nonwoven fabric. An antibacterial hydrophilic repair layer is disposed inside the barrier layer and is made of hydrophilic fibers, on which repair microcapsules are loaded. The antibacterial hydrophilic repair layer has a split structure, including two separate left and right substrates, which correspond to the left and right cheek areas of the human body when wearing a mask, respectively. The two substrates form a cavity between the mouth and nose that exposes the barrier layer. The wall material of the repair microcapsule is a composite wall material of thermosensitive material and friction-sensitive material, and the core material is a first skin care active composition. The composite wall material is used to trigger the initial release of the repair microcapsule by the thermosensitive material under the action of body temperature, and to trigger the secondary release of the repair microcapsule by the friction-sensitive material under the action of wearing friction, so as to achieve long-term and controllable sustained release of the first skin care active composition.

2. The calming, repairing, and sun-protective mask as described in claim 1, characterized in that, The temperature-sensitive material is selected from one of phase change wax and temperature-sensitive polyurethane, with a phase change temperature of 35-38℃; the friction-sensitive material is selected from one of modified chitosan and polyurea resin; the repair microcapsules have an average particle size of 5-15μm and a loading of 15%-25%.

3. The calming, repairing, and sun-protective mask as described in claim 1, characterized in that, The hydrophilic fibers of the antibacterial hydrophilic repair layer include chitosan fibers, and the mass of the chitosan fibers accounts for 30%-60% of the total mass of the hydrophilic fibers.

4. The calming, repairing, and sun-protective mask as described in claim 1, characterized in that, The first skincare active composition comprises the following components in parts by weight: 3-8 parts of 1,3-propanediol; 2-5 parts glycerin; Butanediol 2-5 parts; 1,2-Pentanediol 1-3 parts; Dipotassium glycyrrhizate 0.1-1 part; Sodium hyaluronate 0.1-1 part; 0.1-5 parts of active additive; 70-90 parts water; The active additive is selected from at least one of acetylated sodium hyaluronate, hydrolyzed sodium hyaluronate, sodium hyaluronate crosspolymer, ethylhexylglycerin, xanthan gum, panthenol, asiaticoside, and centella asiatica extract.

5. The calming, repairing, and sun-protective mask as described in claim 1, characterized in that, The sun protection layer is made of polypropylene nonwoven fabric that has been treated with a finishing liquid containing ultraviolet absorbers.

6. The calming and repairing sunscreen mask as described in claim 5, wherein the finishing liquid further contains modified mineral sunscreen powder, the modified mineral sunscreen powder being made of a sunscreen matrix that has been surface-modified with polyol or modified silk fibroin, the sunscreen matrix being selected from at least one of nano zinc oxide and nano titanium dioxide.

7. The calming, repairing, and sun-protective mask as described in claim 1, characterized in that, The mask also includes a dot matrix support layer, which is disposed inside the antibacterial hydrophilic repair layer. The surface of the support layer facing away from the antibacterial hydrophilic repair layer has a dot matrix structure composed of multiple micro-protrusions.

8. The calming, repairing, and sun-protective mask as described in claim 7, characterized in that, The lattice support layer is loaded with a second skin-care active composition, which comprises the following components by mass parts: 2-6 parts of 1,3-propanediol; 1-4 parts glycerin; Butanediol 1-4 parts; Panthenol 0.5-3 parts; Ceramide NP 0.1-1 part; Sodium hyaluronate 0.05-0.5 parts; Dipotassium glycyrrhizate 0.05-0.5 parts; Centella asiatica extract 0.1-2 parts; 70-90 parts water.

9. The calming, repairing, and sun-protective mask as described in claim 7, characterized in that, The material of the lattice support layer is a thermoplastic elastomer or silicone rubber with a hardness of Shore A 20-40; the lattice density of the lattice structure is 15-35 dots / cm³. 2 The micro-protrusion has a height of 0.2-1.2 mm and a diameter of 0.2-1.0 mm, and its top end is an arc surface.

10. The calming, repairing, and sun-protective mask as described in claim 1, characterized in that, The outer layer is made of lily yarn.

11. The calming, repairing, and sun-protective mask as described in claim 10, characterized in that, The lily yarn is composed of fibers with irregular cross-sections, and the surface of the fibers forms a micro-uneven structure. The irregular cross-sections are used to allow light to undergo multiple refractions and transmissions inside the fibers, and the micro-uneven structure is used to allow light to undergo uniform diffuse reflection on the fiber surface, so that the outer layer presents a soft matte texture and a shimmering visual effect.

12. A method for preparing a calming, repairing, and sun-protective mask as described in any one of claims 1-9, characterized in that, Includes the following steps: S1. Prepare the outer layer, sun protection layer and barrier layer respectively; S2. Two nonwoven fabrics are made of hydrophilic fibers containing intrinsic antibacterial materials; S3. Stack the outer layer, sun protection layer, and barrier layer in sequence. Place two pieces of non-woven fabric on the side of the barrier layer away from the sun protection layer, with the two pieces of non-woven fabric symmetrical about the barrier layer. Connect and fix the outer layer, sun protection layer, barrier layer, and non-woven fabric to form the mask body. The barrier layer part corresponding to the gap area between the two pieces of non-woven fabric corresponds to the mouth and nose of the human body when wearing. S4. Spray the liquid containing repair microcapsules onto two pieces of non-woven fabric to form the mask body; S5. Connect the mask body to the hanging strap.

13. The preparation method according to claim 12, characterized in that, In step S1, the sunscreen layer is prepared by the following method: The polypropylene nonwoven fabric is immersed in a finishing solution containing ultraviolet absorber for 1-5 minutes, squeezed until the roll-off rate reaches 70%-90%, pre-dried at 60-80℃ for 2-5 minutes, and then baked at 100-130℃ for 1-3 minutes.

14. The preparation method according to claim 12, characterized in that, In step S1, the barrier layer is prepared by the following method: The nylon nonwoven fabric is immersed in a water-repellent finishing agent for 1-3 minutes, squeezed until the roll-off rate reaches 65%-80%, pre-dried at 80-100℃ for 2-4 minutes, and then baked at 160-180℃ for 1-3 minutes.

15. The preparation method according to claim 12, characterized in that, In step S3, the connection fixing includes the following steps: Hot pressing is performed on the edge areas of the stacked outer layer, sun protection layer, barrier layer and two non-woven fabrics to connect and fix the outer layer, sun protection layer, barrier layer and two non-woven fabrics at the edge areas. The hot pressing temperature is 100-130℃, the pressure is 0.1-0.3MPa, and the time is 3-10 seconds.

16. The preparation method according to claim 12, characterized in that, In step S3, the connection and fixation adopts a step-by-step composite method: First, the overlapping outer layer, sun protection layer and barrier layer are hot-pressed together at the edge area to connect the outer layer, sun protection layer and barrier layer at the edge area to form a composite; The two pieces of non-woven fabric are then connected and fixed to the edge area of ​​the barrier layer on the side away from the sun protection layer by means of adhesive or ultrasonic spot welding.

17. The preparation method according to claim 12, characterized in that, In step S4, the content of repair microcapsules in the spray solution is 3wt%-8wt%; the spray pressure is 0.1-0.3MPa, the spray flow rate is 0.3-0.8mL / s, and the load on each nonwoven fabric is 0.5-1.2mL.

18. The preparation method according to claim 12, characterized in that, Step S4 is followed by: preparing a lattice support layer by micro-jet printing, micro-injection molding, printing or 3D printing processes, and connecting and fixing the lattice support layer to the side of the non-woven fabric away from the barrier layer after spraying.

19. The preparation method according to claim 12, characterized in that, Step S4 is followed by: preparing a lattice support layer by micro-jet printing, micro-injection molding, printing or 3D printing processes, immersing the lattice support layer in the second skin care active composition, drying it, loading the second skin care active composition onto the lattice support layer, and then connecting and fixing the lattice support layer to the side of the nonwoven fabric away from the barrier layer after spraying.

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