Micro-current mask based on FDM multi-material 3D printing and preparation method thereof

Abstract

The invention discloses a micro-current mask based on FDM multi-material 3D printing and a preparation method thereof.The micro-current mask comprises a thin film battery layer, a supporting layer, an active component layer and an adsorption layer, the multi-layer overlapping type structural design is adopted, all the layers are matched with one another and are sequentially arranged from inside to outside, and the areas of all the layers are gradually decreased according to the radian and the contour of the face, so that the micro-current mask is formed. The fitting degree of the micro-current mask is enhanced through the design that the area is gradually reduced in a positive pyramid shape, the micro-current mask better fits the skin according to the facial contour, and pulling and discomfort to the face are reduced. According to the preparation method of the micro-current mask, on the basis of user face scanning data and through multi-dimensional feature fusion analysis, the obtained data is subjected to integrated analysis, so that an established three-dimensional model is more natural and fits the actual face of a user, the micro-current mask is accurately customized, and the fitting degree and comfort of the micro-current mask are improved; meanwhile, the FDM multi-material 3D printing technology is adopted, accurate combination and function integration of multiple materials are supported, and the efficacy and safety of the micro-current mask are enhanced.

Description

Technical field

[0001] However, existing microcurrent masks are mostly single structures, which are difficult to customize according to the user's facial contours and skin characteristics, resulting in poor fit and unable to meet the care needs of different skin types, affecting the use effect; and the existing manufacturing process has limitations on the combination of multiple materials, making it difficult to integrate multiple functional materials into a mask, limiting the functionality and innovation of the product. [Summary of the invention] In order to solve the technical problems that the current microcurrent mask has a single structure, is difficult to customize according to the user's facial contour and skin characteristics, and cannot meet the user's needs for efficient, safe and comfortable skin care, the present invention proposes a microcurrent mask based on FDM multi-material 3D printing and a preparation method thereof.

[0002] To achieve the above objectives, the present invention proposes a microcurrent facial mask based on FDM multi-material 3D printing, wherein the microcurrent facial mask comprises a thin film battery layer, a support layer, an active ingredient layer and an adsorption layer; The thin film battery layer is located on the outermost layer and is detachably connected to the support layer. The thin film battery layer is used to provide microcurrent for the microcurrent mask. The support layer is located below the thin film battery layer, and the support layer is used to enhance the mechanical strength of the microcurrent mask; The active ingredient layer is located below the support layer, and the active ingredient layer is used to quickly release the active ingredient under the stimulation of microcurrent; The adsorption layer is located below the active ingredient layer. The adsorption layer includes a microporous membrane layer and a first inductive hydrogel layer. The microporous membrane layer is in contact with the skin, and the first inductive hydrogel layer is in contact with the active ingredient layer. Under the action of microcurrent, the first inductive hydrogel layer promotes the skin to absorb the active ingredient released by the active ingredient layer.

[0003] By adopting the above-mentioned technical solution, the microcurrent mask adopts a multi-layer overlapping structure design. The layers cooperate with each other and are arranged in sequence from the inside to the outside. The area of ​​each layer gradually decreases according to the curvature and contour of the face. The positive pyramid-shaped gradually decreasing area design enhances the fit of the microcurrent mask, so that it can better fit the skin according to the facial contour, reducing pulling and discomfort on the face.

[0004] As described above, in a microcurrent facial mask based on FDM multi-material 3D printing, the support layer includes a conductive fiber layer and a second inductive hydrogel layer, the conductive fiber layer is detachably connected to the thin-film battery layer and covers the second inductive hydrogel layer, the conductive fiber layer is used to conduct microcurrent, the second inductive hydrogel layer is located in the innermost layer and is in contact with the active ingredient layer, and the second inductive hydrogel layer is used to control the active ingredient layer to release active ingredients under the action of microcurrent.

[0005] In the microcurrent facial mask based on FDM multi-material 3D printing as described above, the thin film battery layer includes: A battery unit, wherein a plurality of battery units are provided and the battery units are attached to the conductive fiber layer; A protective layer, located at the outermost layer, for sealing the battery cell and providing protection; An electrode layer, the electrode layer is connected to the battery cell, the electrode layer includes a positive electrode and a negative electrode, and the electrode layer is used to transmit current; an electrolyte layer, the electrolyte layer being connected to the electrode layer and configured to transport ions between the positive electrode and the negative electrode of the electrode layer; A conductive connection layer is located in the innermost layer. Contacts are provided at the connection between the conductive connection layer and the battery cells. The contacts are connected to the conductive fiber layer through an interface to form a closed loop.

[0006] As described above, in a microcurrent mask based on FDM multi-material 3D printing, the protective layer is made of a flexible protective material, the thickness of the protective layer is 50 to 100 microns, the thickness of the electrode layer is 10 to 50 microns, and the electrolyte layer is made of a solid polymer material, the thickness of the electrolyte layer is 50 to 100 microns.

[0007] As described above, in a microcurrent facial mask based on FDM multi-material 3D printing, the active ingredient layer includes active ingredients and functional ingredients, the active ingredients include freeze-dried powder, and the functional ingredients include any one of moisturizing factors, anti-aging ingredients and antibacterial ingredients, or a combination of two or more.

[0008] As described above, a microcurrent facial mask based on FDM multi-material 3D printing, the microporous membrane layer includes a matrix material, an antibacterial agent, a plasticizer and a cross-linking agent, the mass ratio of the matrix material to the antibacterial agent is 1:5 to 1:10, the addition ratio of the plasticizer is 2 to 5% of the volume of the microporous membrane layer, and the molar ratio of the cross-linking agent is 0.01 to 0.05 per unit number of chitosan molecules in the matrix material.

[0009] In addition, to achieve the above objectives, the present invention also proposes a method for preparing a microcurrent facial mask based on FDM multi-material 3D printing, comprising the following steps: Acquire facial three-dimensional shape and surface feature data; According to the facial three-dimensional shape and surface feature data, a three-dimensional model is established based on a multi-dimensional feature fusion analysis of facial curvature and texture features; Determine the spatial layout of the support layer, active ingredient layer, and adsorption layer based on the three-dimensional model, and establish a corresponding two-dimensional printing path; The microcurrent facial mask is obtained by printing layer by layer according to the spatial layout and the two-dimensional printing path.

[0010] By adopting the above-mentioned technical solution, based on the user's facial scanning data and through multi-dimensional feature fusion analysis, the acquired data is integrated and analyzed, making the established three-dimensional model more natural and close to the user's actual face, so that the surface curvature and thickness of the microcurrent mask can be accurately customized, and the fit and comfort of the microcurrent mask can be improved; at the same time, FDM multi-material 3D printing technology is adopted to support the precise combination and functional integration of multiple materials, thereby enhancing the efficacy and safety of the microcurrent mask.

[0011] The method for preparing a microcurrent facial mask based on FDM multi-material 3D printing as described above, wherein the spatial layout of the support layer, the active ingredient layer, and the adsorption layer is determined according to the three-dimensional model, and a corresponding two-dimensional printing path is established, further comprising the following steps: Mapping the three-dimensional model onto the 2.5D model to generate a boundary outline of the microcurrent mask; determining the spatial layout of the support layer, the active ingredient layer, and the adsorption layer based on the differences in the boundary contours; According to the spatial layout of the support layer, active ingredient layer and adsorption layer, the printing paths of the support layer, active ingredient layer and adsorption layer are obtained by processing with a two-dimensional slice printing path adaptive algorithm.

[0012] The method for preparing a microcurrent facial mask based on FDM multi-material 3D printing as described above, wherein the support layer, the active ingredient layer, and the adsorption layer are printed layer by layer according to the spatial layout and the two-dimensional printing path to obtain the microcurrent facial mask, further comprises the following steps: Printing the support layer: printing the conductive fiber layer and the second inductive hydrogel layer layer by layer along a spiral path that gradually expands outward from the center area of ​​the facial contour according to the printing path of the support layer; Spraying the active ingredient layer: According to the printing path of the active ingredient layer and the spatial layout of the active ingredient layer, the active powder is evenly sprayed on the second inductive hydrogel layer of the support layer by electrostatic spraying, wherein the active powder includes active ingredients and functional ingredients; Printing the adsorption layer: Printing the first inductive hydrogel and the microporous membrane layer layer by layer according to the printing path of the adsorption layer. When printing the microporous membrane layer, the printing method of the partitioned network structure is adopted to gradually transition from the central area of ​​the face to the edge area; Printing thin-film battery layers.

[0013] In the method for preparing a microcurrent facial mask based on FDM multi-material 3D printing as described above, the support layer, the active ingredient layer, and the adsorption layer are printed layer by layer according to the spatial layout and the two-dimensional printing path. Before obtaining the microcurrent facial mask, a facial mask solution required for the printing process needs to be prepared. The step of preparing the facial mask solution required for the printing process includes the following steps: Chitosan was added to deionized water at 45°C at a concentration of 3-7 mg / mL and stirred until the chitosan was completely dissolved to form a mixed solution; Add 10% gelatin by volume to the mixed solution and stir thoroughly while raising the temperature of the mixed solution to 60°C to form a uniform matrix solution; Add sodium alginate at a concentration of 0.5-1 mol / L dropwise to the matrix solution and stir thoroughly to ensure that it is evenly dispersed in the matrix solution; After cooling to room temperature, 100 μg / mL silver ions and 0.08 mg / mL antimicrobial peptide were added, stirred evenly, and then 3% glycerol was added as a plasticizer; A cross-linking agent with a molar ratio of 0.03 was added to obtain the mask solution required for printing the microporous membrane layer.

[0014] Compared with the existing technology, the microcurrent facial mask based on FDM multi-material 3D printing and its preparation method proposed in the present invention have the following beneficial effects: 1. The microcurrent mask proposed in the present invention adopts a multi-layer overlapping structure design. The layers cooperate with each other and are arranged in sequence from the inside to the outside. The area of ​​each layer gradually decreases according to the curvature and contour of the face. The positive pyramid-shaped step-by-step decreasing area design enhances the fit of the microcurrent mask, so that it can better fit the skin according to the facial contour, reducing pulling and discomfort on the face.

[0015] 2. The thin-film battery layer proposed in the present invention can be removed from the microcurrent mask and recycled after use, thereby reducing material waste and improving environmental protection performance. Users can also flexibly choose whether to use the microcurrent function according to their different skin conditions and skin care needs, thereby improving the applicability of the product.

[0016] 3. The preparation method proposed in the present invention is based on the user's facial scanning data and integrates and analyzes the acquired data through multi-dimensional feature fusion analysis, so that the established three-dimensional model is more natural and fits the user's actual face, thereby accurately customizing the surface curvature and thickness of the microcurrent mask, improving the fit and comfort of the microcurrent mask; at the same time, FDM multi-material 3D printing technology is used to support the precise combination and functional integration of multiple materials, thereby enhancing the efficacy and safety of the microcurrent mask.

[0017] 4. The conductive fiber layer proposed in this invention adopts the technology of dynamically regulating microcurrent. Through the segmented optimized printing design of the conductive fiber layer, precise regulation of microcurrent in different facial areas is achieved, so that the microcurrent can act evenly on the skin and promote the release and absorption of active ingredients.

Brief Description of the Drawings

[0018] Figure 1 This is a schematic diagram of the overall effect of the microcurrent mask based on FDM multi-material 3D printing of the present invention; Figure 2 It is a schematic diagram of the gradient grid interweaving structure of the present invention; Figure 3 Schematic diagram of the process interface of FDM multi-material 3D printing of the present invention; Figure 4 This is a flow chart of the method for preparing a microcurrent facial mask based on FDM multi-material 3D printing of the present invention.

[0019] Figure 5 for Figure 4 Specific flow chart of step S3 in FIG.

[0020] Figure 6 for Figure 4 Specific flow chart of step S4 in FIG. [Specific implementation method] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0021] The present invention proposes a microcurrent facial mask based on FDM multi-material 3D printing and a preparation method thereof. The microcurrent facial mask is made using the FDM multi-material 3D printing process. The FDM multi-material 3D printing process is a fused deposition modeling (FDM) printing technology, which refers to the use of multiple materials in the same printing process to manufacture products with composite properties or complex structures.

[0022] The 3D printing device used is prior art, and the specific structure of the 3D printing device is not described in detail in the embodiment of the present invention.

[0023] The present invention adopts the FDM multi-material 3D printing process to make the microcurrent mask. Based on the user's facial scanning data and combined with the layer-by-layer stacking characteristics of FDM, the surface curvature and thickness of the microcurrent mask can be customized to improve the fit and breathability; at the same time, it supports the precise combination and functional integration of multiple materials to enhance the efficacy and safety of the microcurrent mask.

[0024] First embodiment: Please refer to Figures 1 to 3 As shown, this embodiment proposes a microcurrent mask based on FDM multi-material 3D printing, wherein the microcurrent mask includes a thin film battery layer 10, a support layer 20, an active ingredient layer 30 and an adsorption layer 40. The thin film battery layer 10 is located at the outermost layer and is detachably connected to the support layer 20. The thin film battery layer 10 is used to provide microcurrent for the microcurrent mask. The support layer 20 is located below the thin film battery layer 10. The support layer 20 is used to enhance the mechanical strength of the microcurrent mask. The active ingredient layer 30 is located below the support layer 20. The active ingredient layer 30 is used to quickly release active ingredients under the stimulation of microcurrent. The adsorption layer 40 is located below the active ingredient layer 30. The adsorption layer 40 includes a microporous membrane layer and a first inductive hydrogel layer. The microporous membrane layer contacts the skin. The first inductive hydrogel layer is in contact with the active ingredient layer 30. Under the action of microcurrent, the first inductive hydrogel layer promotes the skin to absorb the active ingredients released by the active ingredient layer.

[0025] In this embodiment, the microcurrent mask adopts a multi-layer overlapping structure design. The layers cooperate with each other and are arranged from the inside out. The area of ​​each layer gradually decreases according to the curvature and contour of the face. The positive pyramid-shaped gradually decreasing area design enhances the fit of the microcurrent mask, so that it can better fit the skin according to the facial contour, reducing pulling and discomfort on the face. In addition, under the stimulation of microcurrent, the microcurrent mask will promote skin metabolism, allowing the active ingredients in the active ingredient layer to penetrate into the skin more quickly and deeply, thereby improving the skin's elasticity and firmness; at the same time, the thin-film battery layer can be removed and recycled from the microcurrent mask after use, which reduces material waste, improves environmental performance, and improves safety. Users can also flexibly choose whether to use the microcurrent function according to their different skin conditions and skin care needs, thereby improving the applicability of the product.

[0026] Furthermore, as a preferred embodiment of the present invention but not a limitation, the support layer 20 includes a conductive fiber layer and a second inductive hydrogel layer, the conductive fiber layer is detachably connected to the thin film battery layer 10, the conductive fiber layer is covered on the second inductive hydrogel layer, the conductive fiber layer is used to conduct microcurrent, the second inductive hydrogel layer is located in the innermost layer and is in contact with the active ingredient layer 30, and the second inductive hydrogel layer is used to control the release of active ingredients from the active ingredient layer 30 under the action of microcurrent.

[0027] Specifically, the conductive fiber layer conducts microcurrent and controls the melting rate of the second inductive hydrogel layer through intermittent stimulation, thereby controlling the rate at which the active ingredient layer 30 releases the active ingredient. At the same time, the second inductive hydrogel layer is converted into a liquid under the stimulation of the microcurrent, combines with substances such as freeze-dried powder in the active ingredient layer 30, and is ultimately absorbed by the skin through the adsorption layer.

[0028] In this embodiment, the conductive fiber layer can effectively conduct microcurrent, ensuring that the microcurrent can be stably transmitted from the thin-film battery layer to the subsequent active ingredient layer and adsorption layer, so that the microcurrent can act evenly on the skin, promoting the release and absorption of the active ingredients; the second inductive hydrogel layer is in contact with the active ingredient layer, and can accurately control the release of active ingredients under the action of microcurrent, improve the utilization efficiency of active ingredients, and enhance the skin care effect of the microcurrent mask; at the same time, the support layer with a multi-layer structure design can better adapt to the facial contour, provide good fit and comfort, and can also buffer the external force impact of the microcurrent mask during use, reduce the pulling and discomfort on the facial skin, while maintaining the stability and shape of the mask.

[0029] Alternatively, the conductive fiber layer is made of a flexible polymer-based material, and the thickness of the conductive fiber layer is 100-150 microns; the second inductive hydrogel layer is made of a highly water-absorbent conductive material, and the thickness of the second inductive hydrogel layer is 150-200 microns.

[0030] Furthermore, as a preferred embodiment of the present invention but not a limitation, the thin film battery layer 10 includes a battery cell, a protective layer, an electrode layer, an electrolyte layer and a conductive connection layer. There are multiple battery cells, and multiple battery cells are attached to the conductive fiber layer. The protective layer is located at the outermost layer, and the protective layer is used to seal the battery cell and provide protection. The electrode layer is connected to the battery cell, and the electrode layer includes a positive electrode and a negative electrode. The electrode layer is used to transmit current. The electrolyte layer is connected to the electrode layer, and the electrolyte layer is used to transmit ions between the positive electrode and the negative electrode of the electrode layer. The conductive connection layer is located at the innermost layer, and a contact is provided at the connection between the conductive connection layer and the battery cell. The contact is connected to the conductive fiber layer through an interface to form a closed loop.

[0031] Among them, the conductive method of the conductive connection layer and the conductive fiber layer is an interface press type, that is, in the initial state (that is, the unpressed state), the contacts of the conductive connection layer and the contacts of the conductive fiber layer are at a certain distance or in a high resistance state, and current cannot pass effectively; when pressure is applied, the contacts of the conductive connection layer and the contacts of the conductive fiber layer are pressed tightly, so that the contact area between the conductive materials increases and the resistance decreases, thereby triggering electrical closure and establishing an effective electrical circuit.

[0032] In addition, in the central area of ​​the face, since this area has more oil secretion, the battery cells on the conductive fiber layer in this area are connected in series to increase the voltage output, thereby enhancing the penetration of the microcurrent, allowing the microcurrent to act more deeply on the deep tissues of the skin, promoting the skin to effectively absorb active ingredients and improving the skin care effect; in the edge area of ​​the face, since this area has less oil secretion, the battery cells on the conductive fiber layer in this area are connected in parallel to provide a more uniform microcurrent distribution, ensuring that the skin in the edge area can also fully absorb the active ingredients.

[0033] In this embodiment, the conductive connection layer and the conductive fiber layer adopt an interface press-type conductive method, which can prevent the microcurrent mask from being accidentally energized when not in use, avoiding harm to the user due to accidents such as current leakage, and improving usage safety; According to different facial areas, the battery units use different connection methods to achieve precise adjustment of microcurrents in different facial areas, ensuring that the entire face can obtain appropriate current intensity and skin care effects.

[0034] Alternatively, the size of the battery unit is preferably 50 mm x 40 mm x 5 mm, and the battery unit has a flexible shape adapted to the skin mask.

[0035] Alternatively, the protective layer is made of a flexible protective material, the thickness of the protective layer is 50 to 100 microns, the electrode layer is made of a conductive material, the thickness of the electrode layer is 10 to 50 microns, and the electrolyte layer is made of a solid polymer material, the thickness of the electrolyte layer is 50 to 100 microns.

[0036] Preferably, in this embodiment, the protective layer has a thickness of 80 microns, the electrode layer has a thickness of 30 microns, and the electrolyte layer has a thickness of 70 microns.

[0037] Furthermore, as a preferred embodiment of the present invention but not limitation, the active ingredient layer 30 is composed of active ingredients and functional ingredients, the active ingredients include freeze-dried powder, and the functional ingredients include any one of moisturizing factors, anti-aging ingredients and antibacterial ingredients, or a combination of two or more.

[0038] Among them, in addition to freeze-dried powder, the active ingredients may also include but are not limited to liquid active ingredients, gel active ingredients, and solid active ingredients. In the actual printing process, different active ingredients can be added according to the user's personal needs for personal customization. The freeze-dried powder proposed in this embodiment is only an example and is not specifically limited to this.

[0039] Furthermore, as a preferred embodiment of the present invention but not a limitation, the microporous membrane layer includes a matrix material, an antibacterial agent, a plasticizer and a cross-linking agent. The mass ratio of the matrix material to the antibacterial agent is 1:5 to 1:10, the addition ratio of the plasticizer is 2 to 5% of the volume of the microporous membrane layer, and the molar ratio of the cross-linking agent is 0.01 to 0.05 of the number of chitosan molecules per unit in the matrix material.

[0040] As a preferred embodiment, the matrix material comprises the following components: chitosan 3-7 mg / mL, gelatin 8-12%, sodium alginate 0.5-1 mol / L; The components of the antibacterial agent include the following components: 50-150 μg / mL of silver ions and 0.05-1 mg / mL of antimicrobial peptides.

[0041] In this embodiment, the matrix material can ensure that the matrix layer has good biocompatibility and adsorption properties, the antibacterial agent can ensure effective inhibition of bacterial growth and maintain biosafety, and the plasticizer and cross-linker are used to improve the mechanical properties and overall stability of the microcurrent mask.

[0042] As a preferred embodiment, the microporous membrane layer is provided with a specific sensing area in the forehead area. The membrane layer thickness in the sensing area is significantly thinner than that in other areas, with a thickness of 10 to 50 microns, so as to significantly enhance the user's perception of changes in active ingredients. When the mask usage time reaches the point where the active ingredients are exhausted, the sensing area prompts the user to stop using it through physical changes in the membrane layer (local deformation) to prevent discomfort or damage to the skin that may be caused by excessive use.

[0043] Second embodiment: Based on the embodiment of the present invention, a microcurrent mask based on FDM multi-material 3D printing, please refer to Figures 4 to 6 As shown, the embodiment of the present invention further proposes a method for preparing a microcurrent facial mask based on FDM multi-material 3D printing, the preparation method comprising steps S1-S4, wherein: S1, obtain facial three-dimensional shape and surface feature data.

[0044] Specifically, through 3D scanning technology, the face is scanned with structured light and multi-spectral dual focus. The facial surface is scanned with structured light, and the camera captures the deformed light image. The three-dimensional coordinates of each point are calculated (that is, the geometric shape of the face is obtained). Multi-spectral light of different wavelengths (such as visible light, near-infrared, etc.) is emitted to illuminate the face, and the reflection / absorption characteristics of the skin for different spectra are captured to obtain the texture characteristics of the skin. The three-dimensional coordinates and skin texture characteristics obtained by the scan are analyzed and processed by a computer to obtain the three-dimensional shape and surface feature data of the face.

[0045] In this embodiment, by obtaining the facial three-dimensional shape and surface feature data, the microcurrent mask can be accurately customized so that it can completely fit the user's facial contour. At the same time, it can also meet the facial feature care needs of different users and improve the use effect and comfort of the microcurrent mask.

[0046] S2, establishing a three-dimensional model based on the facial three-dimensional shape and surface feature data and multi-dimensional feature fusion analysis of facial curvature and texture features.

[0047] Specifically, the collected facial three-dimensional shape and surface feature data are subjected to multi-dimensional feature fusion analysis based on facial curvature and texture features to obtain a three-dimensional model. The multi-dimensional feature fusion analysis refers to a technical process of integrating, correlating and collaboratively analyzing feature information of different data sources or different dimensions (such as geometric shape, surface texture, etc.) through algorithms to extract higher-level comprehensive features or decision-making basis.

[0048] In this embodiment, the three-dimensional shape and surface feature data of the face are integrated and analyzed through multi-dimensional feature fusion analysis, which comprehensively considers the facial shape and surface texture, overcomes the limitations of a single data source, and makes the established three-dimensional model more accurate; at the same time, multi-dimensional feature fusion analysis supports adaptive modeling of different postures and expressions, so that the established three-dimensional model is more natural and close to the actual face, and also lays the foundation for personalized customization of microcurrent masks.

[0049] S3, determining the spatial layout of the support layer, the active ingredient layer, and the adsorption layer according to the three-dimensional model, and establishing a corresponding two-dimensional printing path.

[0050] Specifically, the established three-dimensional model contains various data about the microcurrent mask. These data are mapped to the 2.5D model to generate the boundary contour of the microcurrent mask. According to the differences in the boundary contour, the layer thickness, adsorption area and distribution of functional materials in different regions are adjusted. Based on the adjustment of the layer thickness, adsorption area and distribution of functional materials in different regions, the two-dimensional slice structure of the microcurrent mask is determined. Through the two-dimensional slice printing path adaptive algorithm processing, the printing path of the support layer 20, the active ingredient layer 30 and the adsorption layer 40 can be obtained.

[0051] The data on the microcurrent mask include but are not limited to the curvature, undulations, oil distribution, and pore distribution of the face; the differences in the boundary contour include but are not limited to the softness of the skin, oil concentration, and regional functional requirements; 2.5D model: It is a graphic technology between two-dimensional (2D) and three-dimensional (3D). Based on the two-dimensional plane, the 2.5D model creates a three-dimensional effect by adding height information, shadows, perspective, multi-layer plane combination and other visual techniques, making the image or scene appear to have a certain sense of three-dimensionality and layering.

[0052] In this embodiment, since the rendering and processing of three-dimensional models usually require a large amount of computing resources to process complex geometric information, surface texture features and other information, after reducing its dimensionality to a 2.5D model, the computational complexity is significantly reduced. At the same time, the 2.5D model is more efficient when processing complex structures with planar symmetry, especially when analyzing stacked structures, and can significantly shorten the processing and analysis time while maintaining a high degree of accuracy.

[0053] Furthermore, as a preferred embodiment of this solution but not limiting, step S3 includes steps S31-S33, wherein: S31, mapping the three-dimensional model onto the 2.5D model to generate a boundary outline of the microcurrent mask; S32, determining the spatial layout of the support layer, the active ingredient layer, and the adsorption layer according to the difference in the boundary contours; S33 , obtaining printing paths of the support layer, the active ingredient layer, and the adsorption layer by processing the printing paths through a two-dimensional slicing printing path adaptive algorithm according to the spatial layout of the support layer, the active ingredient layer, and the adsorption layer.

[0054] Specifically, various data about the microcurrent mask in the three-dimensional model are mapped to the 2.5D model to generate the boundary contour of the microcurrent mask. Based on the 2.5D model analysis, the facial area is divided into the T zone (such as the bridge of the nose, forehead and chin), the flexible area (such as the area around the eyes and the corners of the mouth) and the transition area (such as the cheeks). At the same time, according to the differences in the boundary contours, the layer thickness and distribution of functional materials in different areas are adjusted. For example, for the T zone, since this area has more oil secretion and is prone to acne, the mask layer thickness in this area is set to 0.1mm-0.5mm to enhance the adsorption effect. The functional materials in this area mainly contain oil control, anti-inflammatory and other ingredients, and the thickness of the functional material layer is set to 0.2mm-1.0mm; for the flexible area, since the skin in this area is thinner, the mask layer thickness in this area is set to 0.05mm-0.2mm to ensure comfort and appropriate protection. The functional materials in this area mainly contain moisturizing and repairing ingredients, and the thickness of the functional material layer is set to 0.1mm-0.3mm to adapt to the sensitive needs of this area; for the transition area, the mask layer thickness in this area is set to 0.1mm-0.3mm to adapt to normal skin characteristics. The functional materials in this area mainly contain moisturizing and aging ingredients, and the thickness of the functional material layer is set to 0.1mm-0.5mm.

[0055] Based on the adsorption areas, layer thicknesses in different regions, and functional material distribution determined above, the two-dimensional slice structure of the microcurrent mask was determined. The 2.5D model was used to analyze the determined two-dimensional slice structure of the microcurrent mask, ultimately determining the spatial distribution of the support layer 20, active ingredient layer 30, and adsorption layer 40. For example, the support layer 20 is located at the outermost layer of the microcurrent mask, covering the entire surface of the microcurrent mask, and has a layer thickness of 0.05mm-0.2mm. It is used to provide microcurrent and also serves to enhance the mechanical strength of the microcurrent mask and provide stable support for it. The support layer 20 gradually thickens at the edge area to increase support force according to the shape and fitting requirements of the microcurrent mask, and ensures that the mask is not easily broken or deformed during use. The active ingredient layer 30 is located below the support layer 20. In the T zone, the layer thickness of the active ingredient layer 30 should be appropriately increased, and the layer thickness is set to 0.5mm-1.0mm to better meet the requirements of oil control and cleansing. In the flexible area and transition area, a thinner active ingredient layer 30 should be used, and the layer thickness is set to 0.1mm-0.3mm to meet the sensitive requirements of these areas. The adsorption layer 40 is located below the active ingredient layer 30. In the T zone, a thicker adsorption layer 40 should be used, and its layer thickness is set to 0.3mm-0.5mm. In the flexible area and transition area, a thinner adsorption layer 40 should be used, and its layer thickness is set to 0.1mm-0.3mm to avoid discomfort to sensitive areas.

[0056] Based on the determined spatial layout of the support layer 20, active ingredient layer 30 and adsorption layer 40, the two-dimensional slicing printing path adaptive algorithm is processed, and the printing path of each film layer is accurately drawn according to the geometric details of the structure of each film layer, ensuring that the shape and characteristics of each film layer after printing are highly consistent with the three-dimensional model after simulated attachment.

[0057] In this embodiment, based on the 2.5D model analysis, the face is divided into different areas, and the layer thickness and functional material distribution of each area are adjusted according to the characteristics and needs of each area, so that the microcurrent mask can better fit the facial contour and improve the comfort of use. It can also meet the care needs of different areas and improve the overall efficacy and pertinence of the microcurrent mask. At the same time, for users with different facial contours, skin types and skin problems, they can customize a microcurrent mask for themselves by adjusting parameters such as the area division, layer thickness and functional material distribution of the microcurrent mask, thereby improving the applicability and effectiveness of the mask.

[0058] S4, printing layer by layer according to the spatial layout and the two-dimensional printing path to obtain the microcurrent facial mask.

[0059] Furthermore, as a preferred embodiment of this solution but not limiting, step S4 includes steps S41-S44, wherein: S41, printing the support layer: according to the printing path of the support layer, the conductive fiber layer and the second inductive hydrogel layer are printed layer by layer along a spiral path that gradually expands outward from the central area of ​​the facial contour.

[0060] Specifically, when printing the support layer, the 3D printing device's print head switches to the one suitable for printing the support layer. The conductive fiber layer is printed first. Once the conductive fiber layer is printed, the second inductive hydrogel layer is printed along the same path. During printing, the print head deposits the layers layer by layer along a spiral path that gradually expands outward from the center of the facial contour. When printing the conductive fiber layer, a certain amount of space is reserved to accommodate the printing of the second inductive hydrogel layer, ensuring a flat surface after embedding. Furthermore, the path density within different areas is adjusted accordingly based on the characteristics of the facial region. For example, the path density is increased in areas with higher facial curvature (such as the T-zone) and reduced in areas with lower facial curvature (such as the flexible and transitional areas) to enhance softness and comfort.

[0061] In addition, when printing the conductive fiber layer, in order to ensure the uniformity and regional adaptability of the microcurrent conducted by the conductive fiber layer, the microcurrent intensity I acting on the skin is calculated according to the formula:

[0062] Among them, I is the microcurrent intensity (microamperes), V is the voltage (volts), is the resistivity of the i-th segment of the conductive fiber (ohm·cm), is the path length of the i-th segment of the conductive fiber (cm), is the weight correction parameter related to the i-th segment, which is adjusted in combination with the fiber spatial distribution, battery block and regional characteristics. The effects of the skin resistance characteristics of the facial area (roughness, humidity, and color obtained through preliminary scanning images and data analysis) and the spiral laying density of the conductive fiber layer on the microcurrent path are taken into consideration to ensure the uniformity of microcurrent distribution and regional adaptability. The conductive fiber path is segmented and optimized according to the needs of the facial area, with lower current requirements set in areas with higher current requirements (such as the T zone). and and by increasing the path density and length Improve the conductive efficiency; set higher current in areas with lower current demand (such as flexible areas and transition areas) and shorter To balance flexibility and comfort.

[0063] In this embodiment, the spiral path printing method that gradually expands from the center of the facial contour outward can better adapt to the curved surface structure of the face, making the printed support layer fit the facial contour more closely, thereby reducing the displacement and wrinkling of the mask during use and improving user comfort; at the same time, the technology of dynamically regulating microcurrent is adopted, and the segmented optimization printing design of the conductive fiber layer is optimized to achieve precise adjustment of the microcurrent in different facial areas, so that the microcurrent can act evenly on the skin and promote the release and absorption of active ingredients.

[0064] S42, spraying the active ingredient layer: according to the printing path of the active ingredient layer and the spatial layout of the active ingredient layer, spraying the active powder evenly on the second inductive hydrogel layer of the support layer by electrostatic spraying, the active powder including active ingredients and functional ingredients.

[0065] Specifically, when spraying the active ingredient layer, the print head of the 3D printing device will switch to an electrostatic powder spraying print head. According to the determined printing path of the active ingredient layer and the spatial layout of the active ingredient layer, the active ingredient layer is evenly sprayed on the second inductive hydrogel layer of the support layer by electrostatic spraying. During the spraying process, the active powder is directedly adsorbed on the surface of the second inductive hydrogel by the action of the electrostatic field, ensuring a close bond between the active ingredient layer and the support layer. In addition, the spraying amount is controlled according to the characteristics of different facial areas to form a structure with a gradual thickness. At the same time, the movement speed and spraying voltage of the spraying print head are adjusted to achieve uniform coverage of the active powder, ensuring that the spraying effect of different facial areas is accurate and uniform.

[0066] Among them, the spraying thickness is controlled at 10 to 50 microns to ensure the effective storage and release performance of the active ingredients. The moving speed of the spray print head is 50 to 100 mm / s, and the spraying voltage range is 30 to 50 kV.

[0067] As a preferred embodiment, during the spraying process, the spray print head maintains a distance of 10 cm from the film layer.

[0068] S43, printing the adsorption layer: printing the first inductive hydrogel and the microporous membrane layer layer by layer according to the printing path of the adsorption layer, and printing the microporous membrane layer by gradually transitioning from the central area of ​​the face to the edge area using a partitioned network structure printing method.

[0069] Specifically, when printing the adsorption layer, the print head of the 3D printing device will switch to a print head suitable for printing the adsorption layer, first printing the first inductive hydrogel layer. After the first inductive hydrogel layer is printed, the microporous membrane layer is printed. When printing the microporous membrane layer, a gradient grid structure with gradually changing density is dynamically generated based on regional differences in facial skin conditions, by taking into account differences in skin thickness, elasticity, and absorption characteristics. That is, printing is performed in a partitioned grid structure that gradually transitions from the center area of ​​the face to the edge areas. The partitioned grid structure refers to a high-density staggered grid structure in the central area of ​​the face, with a grid density of 80% to 90%, a grid unit size of 100 to 200 microns, and a staggered angle of 0° / 90° or 45° / 135° to provide enhanced mechanical support and conductive properties; the transition area is morphologically adjusted by decreasing the grid density and increasing the unit size, with the grid density gradually transitioning from 80% to 50%, and the grid unit size gradually changing from 200 microns to 300 microns, and gradually changing from a staggered grid to a honeycomb grid in morphology; the edge part uses a low-density flexible spiral grid with a grid density of 50% to 70%, and the spiral spacing gradually decreases from 500 to 800 microns to 300 to 400 microns to enhance flexibility and fit.

[0070] During the printing process, dynamic adjustments will be made based on the different facial regions. The dynamic adjustment rules follow the grid density formula:

[0071] in, is the grid density at the current position, is the maximum density in the central area, is the minimum density of the edge area, d is the distance from the current point to the center, r is the mask radius, and n is the adjustment parameter; The grid cell size is given by the formula:

[0072] in, is the grid cell size at the current position, and are the minimum and maximum sizes of the center and edge regions respectively, and m is the adjustment parameter.

[0073] In this embodiment, based on the regional differences in facial skin conditions, a gradient grid structure with gradually changing density is dynamically generated. This design can accurately adapt to the skin thickness, elasticity and absorption characteristics of different areas of the face. By adjusting the grid density and unit size, it can be ensured that the mask can provide optimal mechanical support and conductive performance in each area; at the same time, by dynamically adjusting the grid density and unit size, the distribution path of the microcurrent can be optimized, which helps to improve the stimulation effect of the microcurrent on the facial skin and promote the skin's absorption of active ingredients.

[0074] S44, printing the thin film battery layer.

[0075] Specifically, when printing the thin-film battery layer, the print head of the 3D printing device will switch to a print head suitable for printing the thin-film battery layer. First, the battery cell is printed and attached to the conductive fiber layer of the support layer. After printing is completed, the conductive connection layer, electrolyte layer, electrode layer and protective layer are printed layer by layer. It should be noted that when printing the conductive connection layer, the contact between the conductive connection layer and the battery cell is printed as an interface press-type contact, so that the contact is connected to the matching contact of the conductive fiber layer through the interface to form a closed loop.

[0076] In this embodiment, the battery cells are directly printed and attached to the conductive fiber layer of the support layer, so as to enhance the adhesion between the battery cells and the support layer, reduce the damage to the battery cells caused by the stretching or folding of the microcurrent mask, and improve the overall structural stability of the mask; when printing the conductive connection layer, the contact point is designed as an interface press-type contact, which can ensure a reliable connection between the conductive connection layer and the conductive fiber layer, thereby preventing poor contact caused by external force or slight displacement during use, and ensuring the stable conduction of microcurrent.

[0077] Furthermore, as a preferred embodiment of this solution but not a limitation, before step S4, a facial mask solution required for the printing process needs to be prepared. The step of preparing the facial mask solution required for the printing process includes steps S51-S55, wherein: S51, adding chitosan at a concentration of 5 mg / mL to deionized water at 45°C, and stirring until the chitosan is completely dissolved to form a mixed solution; S52, adding 10% by volume of gelatin to the mixed solution and stirring thoroughly, while raising the temperature of the mixed solution to 60° C. to form a uniform matrix solution; S53, adding sodium alginate with a concentration of 0.8 mol / L to the matrix solution dropwise and stirring thoroughly to ensure that it is evenly dispersed in the matrix solution; S54, after cooling to room temperature, adding 100 μg / mL silver ions and 0.08 mg / mL antimicrobial peptide, stirring evenly, and then adding 3% glycerol as a plasticizer; S55, adding a cross-linking agent with a molar ratio of 0.03 to obtain a mask solution required for printing the microporous membrane layer.

[0078] As a preferred embodiment, after all the above ingredients are evenly mixed, the mask solution can be degassed using an ultrasonic degassing device to eliminate bubbles in the solution and ensure the uniformity and stable performance of the final microcurrent mask.

[0079] As a preferred embodiment, after the microcurrent mask is manufactured, it is also tested, and the test includes: Test the current intensity in different battery cell connection modes (series or parallel) to ensure it is within the range of 10μA to 20μA; Test the microcurrent conduction capability of the conductive fiber layer path to confirm that the microcurrent intensity in each area meets the design requirements; Measure the concentration changes of active ingredients in the mask using a chromatographic analyzer or other suitable chemical analysis methods; Conduct wearing tests in a simulated environment to record the contact between the mask and facial skin; Test the intelligent reminder function to ensure that when the active ingredient is about to be exhausted, the film in the forehead area can effectively deform and trigger the reminder mechanism.

[0080] Those skilled in the art should understand that the above description is provided as an example of an implementation method in conjunction with specific content, and the specific implementation of the present invention is not limited to these descriptions. Furthermore, due to differences in industry nomenclature, the present invention is not limited to the above nomenclature, nor is it limited to English nomenclature. Any similarity or similarity to the methods and structures of the present invention, or any technical deduction or substitution based on the concept of the present invention, shall be considered within the scope of protection of the present invention.

Claims

1. A microcurrent facial mask based on FDM multi-material 3D printing, characterized in that: The microcurrent facial mask comprises a thin film battery layer, a support layer, an active ingredient layer and an adsorption layer; The thin film battery layer is located on the outermost layer and is detachably connected to the support layer. The thin film battery layer is used to provide microcurrent for the microcurrent mask. The support layer is located below the thin film battery layer, and the support layer is used to enhance the mechanical strength of the microcurrent mask; The active ingredient layer is located below the support layer, and the active ingredient layer is used to quickly release the active ingredient under the stimulation of microcurrent; The adsorption layer is located below the active ingredient layer. The adsorption layer includes a microporous membrane layer and a first inductive hydrogel layer. The microporous membrane layer is in contact with the skin, and the first inductive hydrogel layer is in contact with the active ingredient layer. Under the action of microcurrent, the first inductive hydrogel layer promotes the skin to absorb the active ingredient released by the active ingredient layer.

2. A microcurrent facial mask based on FDM multi-material 3D printing according to claim 1, characterized in that: The supporting layer includes a conductive fiber layer and a second inductive hydrogel layer. The conductive fiber layer is detachably connected to the thin-film battery layer and covers the second inductive hydrogel layer. The conductive fiber layer is used to conduct microcurrent. The second inductive hydrogel layer is located in the innermost layer and is in contact with the active ingredient layer. The second inductive hydrogel layer is used to control the release of active ingredients from the active ingredient layer under the action of the microcurrent.

3. A microcurrent facial mask based on FDM multi-material 3D printing according to claim 2, characterized in that: The thin film battery layer includes: A battery unit, wherein a plurality of battery units are provided and the battery units are attached to the conductive fiber layer; A protective layer, located at the outermost layer, for sealing the battery cell and providing protection; an electrode layer, the electrode layer being connected to the battery cell, the electrode layer comprising a positive electrode and a negative electrode, and the electrode layer being used to transmit current; an electrolyte layer, the electrolyte layer being connected to the electrode layer and configured to transport ions between the positive electrode and the negative electrode of the electrode layer; A conductive connection layer is located in the innermost layer. Contacts are provided at the connection between the conductive connection layer and the battery cells. The contacts are connected to the conductive fiber layer through an interface to form a closed loop.

4. The microcurrent facial mask based on FDM multi-material 3D printing according to claim 3, characterized in that: The protective layer is made of a flexible protective material, and the thickness of the protective layer is 50 to 100 microns. The thickness of the electrode layer is 10 to 50 microns. The electrolyte layer is made of a solid polymer material, and the thickness of the electrolyte layer is 50 to 100 microns.

5. The microcurrent facial mask based on FDM multi-material 3D printing according to claim 1, characterized in that: The active ingredient layer includes active ingredients and functional ingredients. The active ingredient includes freeze-dried powder. The functional ingredient includes any one of moisturizing factors, anti-aging ingredients and antibacterial ingredients, or a combination of two or more of the above.

6. The microcurrent facial mask based on FDM multi-material 3D printing according to claim 1, characterized in that: The microporous membrane layer includes a matrix material, an antibacterial agent, a plasticizer and a cross-linking agent. The mass ratio of the matrix material to the antibacterial agent is 1:5 to 1:

10. The addition ratio of the plasticizer is 2 to 5% of the volume of the microporous membrane layer. The molar ratio of the cross-linking agent is 0.01 to 0.05 per unit number of chitosan molecules in the matrix material.

7. A method for preparing a microcurrent facial mask based on FDM multi-material 3D printing, characterized in that: The following steps are involved: Acquire facial three-dimensional shape and surface feature data; According to the facial three-dimensional shape and surface feature data, a three-dimensional model is established based on a multi-dimensional feature fusion analysis of facial curvature and texture features; Determine the spatial layout of the support layer, active ingredient layer, and adsorption layer based on the three-dimensional model, and establish a corresponding two-dimensional printing path; The microcurrent facial mask is obtained by printing layer by layer according to the spatial layout and the two-dimensional printing path.

8. The method for preparing a microcurrent facial mask based on FDM multi-material 3D printing according to claim 7, characterized in that: The method of determining the spatial layout of the support layer, the active ingredient layer, and the adsorption layer according to the three-dimensional model and establishing a corresponding two-dimensional printing path further includes the following steps: Mapping the three-dimensional model onto the 2.5D model to generate a boundary outline of the microcurrent mask; determining the spatial layout of the support layer, the active ingredient layer, and the adsorption layer based on the differences in the boundary contours; According to the spatial layout of the support layer, active ingredient layer and adsorption layer, the printing paths of the support layer, active ingredient layer and adsorption layer are obtained by processing with a two-dimensional slice printing path adaptive algorithm.

9. The method for preparing a microcurrent facial mask based on FDM multi-material 3D printing according to claim 7, characterized in that: The method further comprises the following steps: printing the support layer, the active ingredient layer, and the adsorption layer layer by layer according to the spatial layout and the two-dimensional printing path to obtain the microcurrent facial mask; Printing the support layer: printing the conductive fiber layer and the second inductive hydrogel layer layer by layer along a spiral path that gradually expands outward from the center area of ​​the facial contour according to the printing path of the support layer; Spraying the active ingredient layer: According to the printing path of the active ingredient layer and the spatial layout of the active ingredient layer, the active powder is evenly sprayed on the second inductive hydrogel layer of the support layer by electrostatic spraying, wherein the active powder includes active ingredients and functional ingredients; Printing the adsorption layer: Printing the first inductive hydrogel and the microporous membrane layer layer by layer according to the printing path of the adsorption layer. When printing the microporous membrane layer, the printing method of the partitioned network structure is adopted to gradually transition from the central area of ​​the face to the edge area; Printing thin-film battery layers.

10. The method for preparing a microcurrent facial mask based on FDM multi-material 3D printing according to claim 7, characterized in that: Before printing the support layer, the active ingredient layer, and the adsorption layer layer by layer according to the spatial layout and the two-dimensional printing path to obtain the microcurrent facial mask, it is necessary to prepare a facial mask solution required for the printing process. The step of preparing the facial mask solution required for the printing process includes the following steps: Chitosan was added to deionized water at 45°C at a concentration of 3-7 mg / mL and stirred until the chitosan was completely dissolved to form a mixed solution; Add 10% gelatin by volume to the mixed solution and stir thoroughly while raising the temperature of the mixed solution to 60°C to form a uniform matrix solution; Add sodium alginate at a concentration of 0.5-1 mol / L dropwise to the matrix solution and stir thoroughly to ensure that it is evenly dispersed in the matrix solution; After cooling to room temperature, 100 μg / mL silver ions and 0.08 mg / mL antimicrobial peptide were added, stirred evenly, and then 3% glycerol was added as a plasticizer; A cross-linking agent with a molar ratio of 0.03 was added to obtain the mask solution required for printing the microporous membrane layer.

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