A membrane cloth, and a preparation method and application thereof

Abstract

The application belongs to the technical field of membrane cloth, and particularly relates to a membrane cloth, a preparation method and application thereof, wherein the membrane cloth comprises a nanofiber composite membrane and a sebum membrane, the nanofiber composite membrane comprises a first membrane cloth, a second connecting layer connected to the first membrane cloth, and a third membrane layer connected to the second connecting layer, the second connecting layer comprises a first collagen solution, a polyvinyl alcohol solution and an additive, and the third membrane layer comprises a second collagen solution and a collagen peptide solution, the membrane cloth adopts a physiological structure similar to human skin, the nanofiber composite membrane has a small fiber diameter, a high porosity, a high hydrophilicity and a high active substance preservation efficiency, the effective components of the nanofiber composite membrane can be dissolved at a high speed and absorbed through the skin at a high speed, the sebum membrane similar to human skin can effectively lock water and collagen, moisturize the skin, tighten and anti-wrinkle, and the sebum membrane can effectively isolate bacteria and resist infection.

Description

Technical Field

[0001] This invention belongs to the field of membrane fabric technology, and particularly relates to a membrane fabric, its preparation method and application. Background Technology

[0002] Water is one of the essential substances for human survival and a crucial component of the body. A lack of water impairs vital functions such as metabolism; for example, a 10% loss of water can threaten health, and a 20% loss can be fatal. As a vital organ, the skin is also significantly affected by dehydration. Covering the body's surface, the skin is most susceptible to environmental factors and easily loses moisture. Dehydrated skin loses elasticity and its repair and regeneration processes slow down, leading to dryness, aging, and poor elasticity. Therefore, hydration, moisturizing, and repairing the skin have become a central theme in modern cosmetics.

[0003] Most moisturizing products on the market today are creams, lotions, and other cosmetics obtained through emulsification. These products typically contain traditional moisturizers such as hyaluronic acid and plant extracts. While they provide some surface hydration, they cannot penetrate deep into the skin to address the root cause of dehydration. Although some products on the market contain transdermal absorption agents, their effectiveness remains unsatisfactory. Therefore, there is a need to develop a mask sheet that addresses the root cause of skin dehydration, thereby improving the user experience. Summary of the Invention

[0004] The purpose of this invention is to overcome the technical problems that most of the above-mentioned cosmetics add traditional moisturizers such as hyaluronic acid and some plant extracts. These cosmetics can only moisturize the skin on the surface, but cannot reach the deep layers of the skin to solve the problem of dehydration from the root. Currently, there are also transdermal absorption agents on the market, but the effect is still not ideal. The invention provides a membrane cloth.

[0005] The present invention adopts the following technical solution: A membrane fabric includes a nanofiber composite membrane and a sebum membrane. The nanofiber composite membrane includes a first membrane fabric, a second connecting layer connected to the first membrane fabric, and a third membrane layer connected to the second connecting layer. The second connecting layer includes a first collagen solution, a polyvinyl alcohol solution, and additives. The third membrane layer includes a second collagen solution and a collagen peptide solution. The sebum membrane includes a medical-grade TPU solution. The membrane fabric comprises the following components by mass fraction: 25-35 parts of the first collagen solution; 10-20 parts of polyvinyl alcohol solution; 5-10 parts of auxiliary agent; 20-30 parts of the second collagen solution; 5-10 parts of collagen peptide dissolving solution; 15-25 parts of medical-grade TPU solution.

[0006] Specifically, the present invention uses high-purity components, which can ensure the safety and gentleness of the product, making it suitable for all skin types, including sensitive skin, and will not cause irritation or allergic reactions.

[0007] The nanofiber composite membrane of the present invention is a porous material with a high surface area, composed of electrospun freeze-dried nanofibers and freeze-dried collagen arranged in an interlaced three-dimensional porous structure. The structure of the nanofiber composite membrane facilitates the rapid release and penetration of active ingredients. The nanofiber composite membrane has an ultra-fine fiber structure, which allows it to closely adhere to the skin and improve the skin's absorption rate of effective ingredients.

[0008] Specifically, the multi-layered structure of the nanofiber composite membrane, through the use of a first collagen solution, a second collagen solution, and a collagen peptide dissolving solution, can penetrate deep into the skin's basal layer, promoting collagen synthesis, accelerating the repair process of damaged skin, stimulating cell regeneration, and enhancing the skin's self-repair ability. Polyvinyl alcohol can improve the membrane's moisture absorption and retention, while also increasing its flexibility, stability, adhesion, and shapeability, making the membrane more comfortable to use and effectively locking in moisture. Furthermore, the first membrane layer, as the base layer, provides basic support, possessing high breathability and softness to protect the skin and provide comfort. The second connecting layer enhances the adhesion between the first membrane layer and the skin, and also increases its toughness and moisturizing properties, promoting the absorption of active ingredients. The third membrane layer carries and releases active ingredients, providing the skin with the necessary moisture and nutrients, helping to improve skin elasticity and repair capabilities.

[0009] The medical-grade TPU solution of this invention has good biocompatibility and breathability, which can simulate the function of human skin, enhance the sealing and fit of the membrane, thereby helping nutrients to better penetrate into the deep layers of the skin, helping to regulate the skin's water-oil balance, making the skin healthier and stronger, ensuring the safety and comfort of the membrane, and enhancing the skin's barrier function while allowing the skin to breathe, protecting the skin from damage from the external environment.

[0010] Furthermore, the first membrane fabric comprises a nonwoven fabric and coconut oil coated on the nonwoven fabric, wherein the coating amount of coconut oil is 3-5 g / m². 2Specifically, non-woven fabric is a soft and breathable material. As the base of the first membrane layer, it provides sufficient strength and flexibility, while its porous structure facilitates the delivery and absorption of active ingredients. Coconut oil, a natural plant oil, is rich in medium-chain fatty acids and has excellent moisturizing properties, effectively reducing transepidermal water loss and helping the skin retain moisture. The natural aroma and soft texture of coconut oil enhance comfort and user experience. The application of coconut oil helps the membrane adhere better to the skin, easily conforming to various facial contours and improving the penetration of active ingredients.

[0011] When coconut oil is at 3-5g / m 2 When applied to non-woven fabric, coconut oil forms a long-lasting moisturizing layer. The thin coating provides adequate hydration without being overly greasy, effectively locking in skin moisture and preventing water loss. Coconut oil not only moisturizes but also contains abundant antioxidants and vitamins. These components help protect and repair skin damage, protecting it from free radical damage, delaying skin aging, and reducing wrinkles and fine lines. When applied to non-woven fabric and in contact with the skin, these beneficial components are quickly absorbed, providing essential nutrients and repair, improving skin condition, and reducing dryness-related itching and flaking. Furthermore, components such as lauric acid in coconut oil have antibacterial and anti-inflammatory properties, effectively inhibiting the growth of bacteria and viruses and reducing the risk of skin infections. Coconut oil can protect skin health and prevent skin diseases. Its medium-chain fatty acid molecules are small and easily absorbed by the skin. Coconut oil can quickly penetrate the skin surface, helping to soften the stratum corneum. As a good medium, it opens the delivery channel for other nutrients, which can promote the better penetration of active ingredients such as collagen and collagen peptides into the skin, thereby improving the overall moisturizing and repairing effect and increasing the skin's absorption rate of effective ingredients.

[0012] Furthermore, the adjuvants include recombinant type III collagen, palmitoyl tripeptide-5, acetyl hexapeptide-8, dipeptide diaminobutyryl benzylamide diacetate, tetradecylaminobutyryl valine urea trifluoroacetate, soluble collagen, and elastin.

[0013] Specifically, these additives not only promote the synthesis of collagen and elastin, enhancing skin elasticity and firmness, but also reduce the appearance of wrinkles and fine lines, and improve uneven skin tone and dullness. At the same time, they can also enhance the skin's moisturizing ability, keeping the skin hydrated. When these effects work together on the skin, it makes the skin younger, smoother, more delicate and elastic.

[0014] Specifically, recombinant type III collagen is similar to the collagen naturally produced by the human body, has excellent biocompatibility, can reduce skin rejection reactions, and is therefore easily absorbed by the skin. It promotes the adhesion and growth of skin cells, helps repair damaged skin, and also helps restore the skin's elasticity and firmness, reducing the appearance of wrinkles and fine lines.

[0015] Palmitoyl tripeptide-5 is a signal peptide with good chemical stability and is not easily decomposed. By increasing stromal cell activity, palmitoyl tripeptide-5 can significantly increase collagen content in the skin, promote the synthesis of collagen and elastin, making the skin younger and more elastic, and reducing wrinkles and fine lines. Palmitoyl tripeptide-5 has anti-wrinkle effects and is suitable for long-term use. Continuous use of palmitoyl tripeptide-5 can significantly reduce average wrinkle parameters.

[0016] Acetyl hexapeptide-8 is a neurotransmitter inhibitory peptide. Compared to other peptides that mimic the effects of botulinum toxin, it has a higher safety profile and a lower risk of side effects. It blocks the transmission of nerve signals for muscle contraction, thus relaxing overactive muscles. By reducing excessive muscle contraction, acetyl hexapeptide-8 helps smooth wrinkles and reduce dynamic wrinkles such as crow's feet and nasolabial folds.

[0017] Dipeptide diaminobutyryl benzylamide diacetate is an anti-glycation peptide that is stable at room temperature, easy to store and use, and can inhibit glycation reactions, promote skin cell metabolism, improve skin brightness, and improve uneven skin tone.

[0018] Tetradecylaminobutyrylvaline butyrate urea trifluoroacetate is a polypeptide with good chemical stability. It possesses antibacterial and anti-inflammatory properties, reducing skin inflammation and promoting the recovery of the skin barrier function. Simultaneously, tetradecylaminobutyrylvaline butyrate urea trifluoroacetate regulates sebum secretion, minimizes pores, and improves skin texture, helping to control shine and blemishes. Furthermore, it acts as a moisturizer and skin conditioner, improving skin hydration and softness, effectively locking in moisture, preventing water loss, and enhancing the skin's moisturizing ability to maintain a hydrated state.

[0019] Soluble collagen, extracted naturally, has high safety and low allergenicity. Its small molecular weight makes it easily absorbed by the skin, deeply moisturizing it, helping to repair the skin barrier, and providing extra moisture and nutrients. By enhancing skin elasticity and firmness, it makes the skin smoother and more delicate.

[0020] Elastin participates in the skin repair process, accelerating wound healing. Furthermore, by supplementing the body with elastin, the skin's elasticity and firmness can be enhanced, reducing wrinkles and sagging, and combating skin aging.

[0021] Furthermore, the preparation method of the first membrane fabric includes the following steps: heating coconut oil to 30-40 degrees Celsius and then spraying it onto the nonwoven fabric, and then cooling and curing it before winding it up.

[0022] Specifically, the method of heating coconut oil, spraying it onto non-woven fabric, and then cooling and solidifying it to prepare the first membrane cloth has beneficial effects such as natural nourishment, enhanced moisturizing properties, antibacterial and anti-inflammatory effects, improved comfort, environmental safety, and ease of preparation and storage. Coconut oil is solid below 27°C and can form a liquid at 30-40°C. When the membrane cloth is applied to the human body, the body temperature can melt the de-cured coconut oil, allowing it to provide a moisturizing film while being gradually absorbed by the body.

[0023] Optionally, in some embodiments, the coconut oil can be heated to 30-40 degrees Celsius using a water bath or a temperature-controlled heater. This temperature range ensures that the coconut oil remains fluid while avoiding damage to its chemical components that may occur due to excessively high temperatures. Preferably, the heating temperature is 36 degrees Celsius.

[0024] Optionally, in some embodiments, natural cooling, cooling cabinets, or cold air cooling can be used to rapidly solidify the coconut oil and form a stable coating. Preferably, the nonwoven fabric coated with coconut oil can be cooled in a cooling cabinet. Rapid cooling helps to obtain a smoother and denser coating surface. The cooling temperature is 15-20°C, and the cooling time is 5-15 minutes. If the cooling temperature is too low or the cooling time is too long, the coconut oil will become too hard, affecting the softness and adhesion of the membrane. During the winding process, to avoid deformation of the nonwoven fabric or damage to the coconut oil coating due to excessive tension, it is necessary to ensure a clean winding environment to prevent dust or impurities from adhering to the membrane, thus ensuring the purity and quality of the product. In addition, the wound membrane should be stored in a dry, cool environment, avoiding direct sunlight and high temperatures, to maintain the stability and effectiveness of the coconut oil.

[0025] Furthermore, the preparation method of the second connecting layer includes the following steps: the first collagen solution, polyvinyl alcohol solution and auxiliary agent are compounded and then spun; the first membrane cloth is used as the base cloth for receiving; the spinning solution flow rate is 1-5 mL / h; a high voltage DC power supply is used; the nozzle voltage is 15-20 kV; the receiving distance is 18-25 cm; the temperature is 22℃-24℃; the humidity is 35%-40%; and the thickness of the second connecting layer is 0.5-0.8 mm.

[0026] Specifically, the spinning solution flow rate is controlled at 1 to 5 mL / h to ensure that the material can be evenly distributed on the first membrane during the spinning process. Too fast a flow rate will lead to uneven fiber distribution, while too slow a flow rate will affect production efficiency.

[0027] Furthermore, the use of a high-voltage DC power supply for spinning ensures the stability of the spinning solution and the uniformity of the fibers during the spinning process. The nozzle voltage is set at 15–20 kV, and the high-voltage electric field causes the spinning solution to rapidly disperse into tiny fibers after being ejected from the nozzle, forming a fiber web structure. Simultaneously, the spinning solution is maintained at 22–24°C, which helps maintain its stability and avoids excessive evaporation. Humidity is controlled at 35%–40%, which facilitates solvent evaporation and fiber formation during spinning, further improving fiber quality and performance. The distance between the nozzle and the receiving base fabric is controlled at 18–25 cm to ensure the stability and uniformity of the spinning solution during its flight. A closer distance affects the fiber diameter and distribution, while a greater distance produces finer fibers and increases the possibility of fiber dispersion.

[0028] The second connecting layer, manufactured using the first membrane fabric as its base, receives the first membrane fabric. The first membrane fabric provides support, allowing the second connecting layer to adhere closely to the facial skin, reducing air bubbles and gaps. This close fit not only improves the mask's moisturizing effect but also increases comfort. The second connecting layer is made from high-quality materials such as collagen and polyvinyl alcohol, which have excellent biocompatibility and stability. Therefore, the membrane fabric is less prone to deformation, damage, or allergic reactions during use, ensuring safety and reliability. The collagen and other additives in the second connecting layer are quickly absorbed by the skin, providing essential nutrients and moisture. Simultaneously, these ingredients promote skin cell repair and regeneration, improving skin texture and tone.

[0029] The thickness of the second connecting layer is controlled at 0.5-0.8 mm to ensure sufficient absorption capacity and moisturizing performance. By producing a nanofiber membrane with high specific surface area and high porosity, the second connecting layer can have good air permeability and permeability, while being able to carry and slowly release collagen and other active ingredients, which helps the skin absorb and utilize them.

[0030] Specifically, the order of compounding the first collagen solution, polyvinyl alcohol solution, and auxiliary agents is as follows: first, mix the first collagen solution and polyvinyl alcohol solution, then add soluble collagen, palmitoyl tripeptide-5, and acetyl hexapeptide-8, then add recombinant type III collagen and elastin and stir to disperse, and then add dipeptide diaminobutyryl benzylamide diacetate and tetradecylaminobutyryl urea trifluoroacetate.

[0031] Specifically, soluble collagen is readily soluble in water. After adding soluble collagen, recombinant type III collagen, due to its larger molecular weight, needs to be added earlier to ensure complete dissolution. After the soluble collagen is completely dissolved, recombinant type III collagen, also due to its larger molecular weight, needs to be added earlier to ensure complete dissolution. This requires slow addition of recombinant type III collagen, using a stirrer at low speed to promote uniform distribution and prevent clumping. Since elastin significantly affects the viscosity and stability of the system, adding it early helps control the overall stability of the formulation. After the aforementioned components are dissolved, elastin is gradually added, continuing to stir to ensure uniform mixing. Once the solution has cooled to room temperature or a lower temperature, heat-sensitive palmitoyl tripeptide-5 and acetyl hexapeptide-8 are added to prevent precipitation at high temperatures. Finally, dipeptide diaminobutyryl benzylamide diacetate and tetradecylaminobutyryl urea trifluoroacetate are added slowly to avoid rapid addition that could cause precipitation of recombinant type III collagen and elastin, and also to reduce the risk of localized polyvinyl alcohol precipitation.

[0032] Furthermore, the preparation method of the third membrane layer includes the following steps: obtaining the third membrane layer by freeze-drying the second collagen solution and the collagen peptide solution, wherein the thickness of the third membrane layer is 0.5-1.5 mm.

[0033] Specifically, the freeze-drying process involves uniformly spreading and freezing the mixed solution to crystallize the water, thus avoiding uneven film thickness after freeze-drying. The freezing temperature is between -40 and -80°C, and the time is 1-2 hours. Under vacuum, the pressure is reduced to allow the water to directly sublimate from the solid to the gaseous state, thereby removing the water. The sublimation desorption drying temperature is 10-40°C, and the time is 12-15 hours to obtain a dry film.

[0034] Freeze-drying is a gentle processing method that transforms a solution into a solid film without damaging the active ingredients. It avoids the use of chemical additives, resulting in a gentler, non-irritating product suitable for all skin types. Freeze-drying also avoids factors that can damage the activity of raw materials, such as high temperatures and high pressures, thus improving product safety and efficacy. The freeze-dried third film has a smaller volume and lighter weight, facilitating storage and transportation. Furthermore, its solid form reduces the risk of liquid leakage or deterioration during storage and transportation.

[0035] The thickness of the third membrane layer is precisely controlled between 0.5-1.5mm, ensuring sufficient active ingredient load while maintaining the membrane's thinness and breathability for easy skin absorption. Precise control ensures a proper match between the second connecting layer and the skin membrane layer, optimizing the overall performance of the membrane. The freeze-drying process preserves the activity of the second collagen and collagen peptides. These components possess excellent moisturizing properties and good skin affinity, forming a protective film on the skin surface to effectively lock in moisture, prevent water loss, and provide long-lasting hydration. Collagen and collagen peptides promote collagen synthesis, enhancing skin elasticity and firmness. Long-term use of membranes containing the third membrane layer helps improve skin laxity and wrinkles, resulting in younger, smoother skin. These components in the third membrane layer are rapidly absorbed by the skin, providing essential nutrients and promoting skin cell metabolism and repair.

[0036] Furthermore, the preparation method of the sebum film includes the following steps: using a medical-grade TPU solution as a spinning solution, spinning is performed on the third membrane layer. The spinning solution flow rate is 4–9 mL / h, a high-voltage DC power supply is used, the nozzle voltage is 30–40 kV, the receiving distance is 12–15 cm, the temperature is 22℃–24℃, and the humidity is 35%–40%. The thickness of the sebum film is 0.2–0.5 mm. During the electrospinning process, the medical-grade TPU solution is injected into a nozzle with a high-voltage electric field. Due to the effect of the electric field, the spinning solution is stretched into extremely fine fibers and deposited on the third membrane layer to form a fiber web. Electrospinning technology can prepare nanofibers with high specific surface area and porous structure, which can improve the adsorption capacity and moisturizing effect of the membrane. The sebum film can simulate the natural sebum layer of human skin, thereby providing a protective barrier to prevent moisture loss while allowing the skin to breathe appropriately. Good breathability provides a comfortable user experience and reduces skin discomfort.

[0037] In addition, spinning is performed on the third membrane layer. Medical-grade TPU solution is sprayed out through a nozzle to form fibers. The flow rate of the spinning solution is controlled at 4-9 mL / h, which is higher than that of the second connecting layer. This is because the medical-grade TPU solution can produce finer fibers at a faster flow rate, but it also requires higher spinneret pressure and temperature to maintain a continuous spinning process. Thus, the higher flow rate ensures the continuity and uniformity of the fibers, and ensures that the medical-grade TPU solution can be evenly distributed on the third membrane layer during the spinning process.

[0038] Furthermore, a high-voltage DC power supply is used, with the nozzle voltage set at 30-40kV. This voltage range provides sufficient electric field force to spray and stretch the solution into fibers. Increasing the nozzle voltage to 30-40kV helps form finer fibers, increasing the smoothness and adhesion of the sebum film.

[0039] Specifically, the distance between the nozzle and the third film layer is controlled at 12–15 cm. This allows for precise control of TPU fiber deposition, ensuring close adhesion to the third film layer and forming a tight barrier. Maintaining the temperature at 22°C–24°C helps maintain the stability of the spinning solution and avoids excessive evaporation. Humidity control at 35%–40% facilitates solvent evaporation and fiber formation during spinning, helping to control the evaporation rate of the solution and the fiber curing process. These temperature and humidity conditions, consistent with the previous second connecting layer spinning step, maintain process consistency and product stability. The thickness of the sebum film is controlled at 0.2–0.5 mm to ensure sufficient protection and breathability, while maintaining good fit and comfort.

[0040] Another object of the present invention is to provide a method for preparing a membrane fabric.

[0041] A method for preparing a membrane fabric includes the following steps: S1. After mixing the first collagen solution with the polyvinyl alcohol solution, add the auxiliary agent to form a compound solution and spin it, and use the first membrane cloth as the base cloth to receive it to form the second connecting layer. Specifically, nanofibers possess a large specific surface area and high permeability, enabling them to better carry and release moisturizing ingredients, thus improving moisturizing efficiency. Through electrospinning or other spinning techniques, a second connecting layer rich in active ingredients is formed, enhancing the membrane's moisturizing and repairing capabilities. This second connecting layer not only provides physical support but also strengthens the membrane's moisturizing and nutrient delivery capabilities. A mixture of collagen and polyvinyl alcohol provides an excellent moisturizing base, while additives further enhance the moisturizing effect. The combination of the second connecting layer and the third membrane layer achieves a synergistic effect across the multi-layer structure, not only enhancing the moisturizing effect but also providing more nutrients, contributing to comprehensive skin care.

[0042] S2. On the second connecting layer prepared in S1, a nanofiber composite membrane is formed by tightly pressing and bonding it with the third membrane layer. This tight-fitting method ensures a close bond between the two layers, improving the overall strength and durability of the membrane. This step not only increases the thickness and structural strength of the membrane but also achieves deeper nourishment and moisturization through the double-layer design. Medical-grade TPU material has excellent breathability and water resistance, forming a protective film to prevent external pollutants and moisture from harming the skin.

[0043] S3. Using a medical-grade TPU solution as a spinning solution, a skin layer is spun onto the nanofiber composite membrane prepared in S2 to form a membrane fabric. The softness and elasticity of the medical-grade TPU material allow the skin layer to adhere more closely and comfortably to the skin, reducing friction and discomfort. Its excellent elasticity and breathability increase the comfort and practicality of the membrane fabric. The formation of the skin layer further stabilizes the structure and performance of the membrane fabric, ensuring its continuous moisturizing and protective functions during use, and improving the sealing and protective properties of the membrane fabric.

[0044] Furthermore, the fiber diameter of the second connecting layer obtained by spinning in step S1 is 100 nm to 800 nm, and the fiber diameter of the film layer obtained by spinning in step S3 is 50 nm to 230 nm.

[0045] The precise control of nanofiber diameter gives the membrane a soft, delicate feel, allowing it to closely adhere to the skin and reduce friction and discomfort. Simultaneously, its excellent breathability ensures the skin can breathe freely while remaining moisturized, preventing a stuffy feeling from prolonged use. The fine structure of the nanofibers forms a protective film on the skin's surface, enhancing its barrier function. This helps prevent harmful external substances from penetrating the skin and protects it from damage. Precise control of the nanofiber diameter ensures more stable membrane performance. Whether it's moisturizing effect, permeability, or user experience, it remains at a relatively constant level, improving product reliability and durability.

[0046] Specifically, the second connecting layer has a high specific surface area, which is beneficial for the effective loading of active ingredients such as the first collagen and auxiliary agents, and can increase the surface area in contact with the skin, promote the delivery of nutrients and skin absorption, and ensure that the membrane has good permeability.

[0047] Specifically, the membrane layer utilizes finer nanofibers with diameters ranging from 50nm to 230nm, allowing it to closely adhere to the skin and enabling more nutrients and moisturizing factors to quickly penetrate deeper into the skin, thus more effectively moisturizing and nourishing. The fine structure of the nanofibers allows the membrane to store more moisture and effectively lock it in, preventing evaporation and ensuring a continuously hydrated environment for the skin, enhancing moisturizing effects. The membrane layer's higher specific surface area improves breathability and mimics the skin's natural barrier function. The smaller nanofiber diameter contributes to the membrane's softness and fit; the finer fibers offer greater flexibility and higher porosity, making the product more comfortable to use while maintaining excellent breathability.

[0048] Another object of the present invention is to provide an application of a membrane fabric for providing moisturizing effects to the skin.

[0049] Optionally, in some embodiments, the mask sheet can be used as a facial mask in skincare products to provide deep hydration and nourishment to the skin. Of course, it can also be used in conjunction with serums, lotions, creams, etc., before makeup application. The mask sheet provides ample moisture to the skin, making makeup more adherent and natural, reducing caking and makeup slippage. The mask sheet of this invention can effectively lock in moisture, providing long-lasting hydration to the skin, helping the skin better absorb the active ingredients in skincare products, and forming a protective film on the skin surface to prevent moisture loss. Long-term use of the mask sheet can significantly improve skin texture, making the skin softer and smoother, while enhancing skin radiance and giving the skin a natural glow.

[0050] Optionally, in some embodiments, the membrane can be used as a medical care product to provide moisturizing effects to the skin. For example, it can be used to cover burns, wounds, etc., providing a moist environment as a wound dressing to promote wound healing. It can also be used in postoperative care to reduce postoperative skin dryness and aid skin recovery. Of course, the membrane can also be used in chronic skin diseases to alleviate symptoms and keep the skin moisturized. The membrane of this invention is soft and has good elasticity, allowing it to conform to the skin in different areas. It can reduce the irritation of sensitive skin by the external environment, help damaged skin accelerate the repair process, and effectively soothe symptoms when used during skin inflammation or discomfort.

[0051] Optionally, in some embodiments, the membrane can help keep facial skin hydrated and reduce fine lines and wrinkles during beauty care; prevent chapping and keep lip skin soft when used on lips; and reduce chapped skin on hands and feet, thus providing additional moisture. The membrane of this invention can penetrate deep into the skin to provide ample moisture. Its special material and structure allow moisture to be quickly absorbed by the skin and form a water-locking layer inside the skin, effectively preventing moisture loss. This deep moisturizing effect helps improve problems such as dry and rough skin, keeping the skin hydrated and smooth.

[0052] Compared to ordinary moisturizing products, this mask, through its special manufacturing process and material selection, allows for the continuous release of moisturizing ingredients, providing long-lasting hydration to the skin. Simultaneously, the mask's tight fit prevents moisture evaporation, further extending the moisturizing time. Specifically, when the mask is applied to the skin, the coconut oil in the first layer is absorbed by the body. This coconut oil, acting as a carrier, quickly brings the effective ingredients of the second and third connecting layers into contact with and are absorbed by the skin. The small diameter of the membrane layers helps prevent external bacteria from invading the skin while ensuring a certain degree of breathability.

[0053] Compared with the prior art, the present invention has the following advantages: 1. The membrane fabric of this invention adopts the physiological structure of human skin. The nanofiber composite membrane has small fiber diameter and high porosity, and has high hydrophilicity and high efficiency in preserving activity. The effective ingredients of the nanofiber composite membrane can dissolve rapidly and be quickly absorbed through the skin. It adopts the sebum membrane that imitates human skin, which can effectively lock in moisture and collagen, moisturize the skin, tighten and reduce wrinkles. The sebum membrane can play a highly effective role in isolating bacteria and resisting infection, becoming a new "protective wall" for the skin.

[0054] 2. The preparation method of the present invention is controllable and precise, which can ensure that the membrane is thin and comfortable, fits well and does not cause any burden. No preservatives are added during the preparation process, and the raw materials used in the production do not irritate the skin.

[0055] 3. This invention provides moisturizing effects to the skin. Its soft and comfortable texture adheres closely to the skin, providing users with a sense of comfort and relaxation. The moisturizing ingredients of this invention are quickly absorbed by the skin, restoring its hydration in a short time and enhancing user satisfaction. Detailed Implementation

[0056] To enable those skilled in the art to better understand the technical solutions described in this invention, the following embodiments are provided for illustration. Unless otherwise specified, the raw materials, reagents, or devices used in the following embodiments can be obtained from conventional commercial channels or by existing known methods.

[0057] The present invention will be further described below with reference to specific embodiments: Table 1: Membrane Fabric Proportions by Mass Fraction

[0058] Examples 1-5 illustrate the preparation methods of the membrane fabric as follows: Weigh the raw materials according to the mass fraction ratio of the membrane fabric in Table 1, and prepare it according to the following steps. S1. After mixing the first collagen solution with the polyvinyl alcohol solution, add the auxiliary agent to form a compound solution and spin it, and use the first membrane cloth as the base cloth to receive it to form the second connecting layer. S2. On the second connecting layer prepared in S1, a nanofiber composite membrane is formed by pressing and bonding it with the third film layer. S3. Using medical-grade TPU solution as a spinning solution, spin the nanofiber composite membrane prepared in S2 to form a film layer, thus obtaining the membrane fabric.

[0059] The preparation method of the first membrane fabric includes the following steps: heating coconut oil to 30-40 degrees Celsius and then spraying it onto the nonwoven fabric, and then cooling and curing it before winding it up.

[0060] The preparation method of the second connecting layer includes the following steps: a first collagen solution, a polyvinyl alcohol solution and an auxiliary agent are compounded and then spun; a first membrane cloth is used as the base cloth for receiving; the flow rate of the spinning solution is 1-5 mL / h; a high-voltage DC power supply is used; the nozzle voltage is 15-20 kV; the receiving distance is 18-25 cm; the temperature is 22℃-24℃; the humidity is 35%-40%; and the thickness of the second connecting layer is 0.5-0.8 mm.

[0061] The order of compounding the first collagen solution, polyvinyl alcohol solution, and additives is as follows: first, mix the first collagen solution and polyvinyl alcohol solution, then add soluble collagen, palmitoyl tripeptide-5, and acetyl hexapeptide-8, then add recombinant type III collagen and elastin and stir to disperse, then add dipeptide diaminobutyryl benzylamide diacetate and tetradecylaminobutyryl urea trifluoroacetate.

[0062] The preparation method of the third membrane layer includes the following steps: the second collagen solution and the collagen peptide solution are subjected to a freeze-drying process to obtain the third membrane layer. The freeze-drying process is carried out at a freezing temperature of -40°C for 1 hour, followed by a sublimation desorption drying process at a temperature of 30°C for 12 hours.

[0063] The preparation method of the sebum film includes the following steps: using medical-grade TPU solution as spinning solution, spinning is performed on the third film layer; the spinning solution flow rate is 4-9 mL / h; a high-voltage DC power supply is used; the nozzle voltage is 30-40 kV; the receiving distance is 12-15 cm; the temperature is 22℃-24℃; the humidity is 35%-40%; and the thickness of the sebum film is 0.2-0.5 mm.

[0064] Example 1 The preparation method of the first membrane fabric includes the following steps: heating coconut oil to 30°C and then spraying it onto the 50g nonwoven fabric, wherein the coating amount of coconut oil is 3g / m². 2 Then, it is wound up by cooling and curing.

[0065] The polyvinyl alcohol solution is prepared by adding eight parts of purified water to each part of polyvinyl alcohol, calculated by mass fraction.

[0066] The preparation method of the second connecting layer includes the following steps: a first collagen solution, a polyvinyl alcohol solution and an auxiliary agent are compounded and then spun; a first membrane cloth is used as the base cloth for receiving; the spinning solution flow rate is 1 mL / h; a high-voltage DC power supply is used; the nozzle voltage is 15 kV; the receiving distance is 18 cm; the temperature is 22 °C; the humidity is 35%; the thickness of the second connecting layer is 0.5 mm; and the fiber diameter of the second connecting layer is 300 nm.

[0067] The preparation method of the third membrane layer includes the following steps: obtaining the third membrane layer by freeze-drying a second collagen solution and a collagen peptide solution. The thickness of the third membrane layer is 0.5 mm.

[0068] The preparation method of the sebum film includes the following steps: using medical-grade TPU solution as spinning solution, spinning is performed on the third film layer, the spinning solution flow rate is 4 mL / h, a high-voltage DC power supply is used, the nozzle voltage is 30 kV, the receiving distance is 12 cm, the temperature is 22 ℃, the humidity is 35%, the thickness of the sebum film is 0.2 mm, and the fiber diameter of the film layer is 100 nm.

[0069] Example 2 The preparation method of the first membrane fabric includes the following steps: heating coconut oil to 40°C and then spraying it onto the 50g nonwoven fabric, wherein the coating amount of coconut oil is 5g / m². 2 Then, it is wound up by cooling and curing.

[0070] The polyvinyl alcohol solution is prepared by adding eight parts of purified water to each part of polyvinyl alcohol, calculated by mass fraction.

[0071] The preparation method of the second connecting layer includes the following steps: a first collagen solution, a polyvinyl alcohol solution and an auxiliary agent are compounded and then spun; a first membrane cloth is used as the base cloth for receiving; the spinning solution flow rate is 5 mL / h; a high-voltage DC power supply is used; the nozzle voltage is 20 kV; the receiving distance is 25 cm; the temperature is 24 °C; the humidity is 40%; the thickness of the second connecting layer is 0.8 mm; and the fiber diameter of the second connecting layer is 500 nm.

[0072] The preparation method of the third membrane layer includes the following steps: obtaining the third membrane layer by freeze-drying a second collagen solution and a collagen peptide solution. The thickness of the third membrane layer is 1.5 mm.

[0073] The preparation method of the sebum film includes the following steps: using medical-grade TPU solution as spinning solution, spinning is performed on the third film layer, the spinning solution flow rate is 9 mL / h, a high-voltage DC power supply is used, the nozzle voltage is 40 kV, the receiving distance is 15 cm, the temperature is 24 ℃, the humidity is 40%, the thickness of the sebum film is 0.8 mm, and the fiber diameter of the film layer is 150 nm.

[0074] Example 3 The preparation method of the first membrane fabric includes the following steps: heating coconut oil to 36°C and then spraying it onto the 50g nonwoven fabric, wherein the coating amount of coconut oil is 5g / m². 2 Then, it is wound up by cooling and curing.

[0075] The polyvinyl alcohol solution is prepared by adding eight parts of purified water to each part of polyvinyl alcohol, calculated by mass fraction.

[0076] The preparation method of the second connecting layer includes the following steps: a first collagen solution, a polyvinyl alcohol solution and an auxiliary agent are compounded and then spun; a first membrane cloth is used as the base cloth for receiving; the spinning solution flow rate is 4 mL / h; a high-voltage DC power supply is used; the nozzle voltage is 20 kV; the receiving distance is 20 cm; the temperature is 22 °C; the humidity is 40%; the thickness of the second connecting layer is 0.6 mm; and the fiber diameter of the second connecting layer is 100 nm.

[0077] The preparation method of the third membrane layer includes the following steps: obtaining the third membrane layer by freeze-drying a second collagen solution and a collagen peptide solution. The thickness of the third membrane layer is 1 mm.

[0078] The preparation method of the sebum film includes the following steps: using medical-grade TPU solution as spinning solution, spinning is performed on the third film layer, the spinning solution flow rate is 7 mL / h, a high-voltage DC power supply is used, the nozzle voltage is 35 kV, the receiving distance is 15 cm, the temperature is 22 ℃, the humidity is 40%, the thickness of the sebum film is 0.5 mm, and the fiber diameter of the film layer is 50 nm.

[0079] Example 4 The preparation method of the first membrane fabric includes the following steps: heating coconut oil to 36°C and then spraying it onto the 50g nonwoven fabric, wherein the coating amount of coconut oil is 4g / m². 2 Then, it is wound up by cooling and curing.

[0080] The polyvinyl alcohol solution is prepared by adding eight parts of purified water to each part of polyvinyl alcohol, calculated by mass fraction.

[0081] The preparation method of the second connecting layer includes the following steps: a first collagen solution, a polyvinyl alcohol solution and an auxiliary agent are compounded and then spun; a first membrane cloth is used as the base cloth for receiving; the spinning solution flow rate is 2 mL / h; a high-voltage DC power supply is used; the nozzle voltage is 15 kV; the receiving distance is 22 cm; the temperature is 23 °C; the humidity is 37%; the thickness of the second connecting layer is 0.7 mm; and the fiber diameter of the second connecting layer is 800 nm.

[0082] The preparation method of the third membrane layer includes the following steps: obtaining the third membrane layer by freeze-drying a second collagen solution and a collagen peptide solution. The thickness of the third membrane layer is 0.75 mm.

[0083] The preparation method of the sebum film includes the following steps: using medical-grade TPU solution as spinning solution, spinning is performed on the third film layer, the spinning solution flow rate is 5 mL / h, a high-voltage DC power supply is used, the nozzle voltage is 32 kV, the receiving distance is 13 cm, the temperature is 23 ℃, the humidity is 37%, the thickness of the sebum film is 0.6 mm, and the fiber diameter of the film layer is 230 nm.

[0084] Example 5 The preparation method of the first membrane fabric includes the following steps: heating coconut oil to 36°C and then spraying it onto the 50g nonwoven fabric, wherein the coating amount of coconut oil is 3g / m². 2 Then, it is wound up by cooling and curing.

[0085] The polyvinyl alcohol solution is prepared by adding eight parts of purified water to each part of polyvinyl alcohol, calculated by mass fraction.

[0086] The preparation method of the second connecting layer includes the following steps: a first collagen solution, a polyvinyl alcohol solution and an auxiliary agent are compounded and then spun; a first membrane cloth is used as the base cloth for receiving; the spinning solution flow rate is 3 mL / h; a high-voltage DC power supply is used; the nozzle voltage is 17 kV; the receiving distance is 24 cm; the temperature is 22 °C; the humidity is 38%; the thickness of the second connecting layer is 0.65 mm; and the fiber diameter of the second connecting layer is 650 nm.

[0087] The preparation method of the third membrane layer includes the following steps: obtaining the third membrane layer by freeze-drying a second collagen solution and a collagen peptide solution. The thickness of the third membrane layer is 1.25 mm.

[0088] The preparation method of the sebum film includes the following steps: using medical-grade TPU solution as spinning solution, spinning is performed on the third film layer, the spinning solution flow rate is 8 mL / h, a high-voltage DC power supply is used, the nozzle voltage is 37 kV, the receiving distance is 14 cm, the temperature is 22℃, the humidity is 38%, the thickness of the sebum film is 0.4 mm, and the fiber diameter of the film layer is 200 nm.

[0089] Comparative Example 1 Compared with Example 3, Comparative Example 1 differs in that the sebum membrane is replaced with 50g of nonwoven fabric, which is then bonded to the third membrane layer by pressing. The fiber diameter of the nonwoven fabric is 1500nm.

[0090] Comparative Example 2 Compared with Example 3, Comparative Example 2 has the following differences: the preparation method of the second connecting layer includes the following steps: the first collagen solution, polyvinyl alcohol solution and auxiliary agent are compounded and then spun; the first membrane cloth is used as the base cloth for receiving; the spinning solution flow rate is 4 mL / h; a high voltage DC power supply is used; the nozzle voltage is 20 kV; the receiving distance is 20 cm; the temperature is 30 °C; the humidity is 50%; the thickness of the second connecting layer is 0.5 mm; and the fiber diameter of the second connecting layer is 1100 nm.

[0091] Comparative Example 3 Compared with Example 3, Comparative Example 3 has the following differences: the preparation method of the sebum film includes the following steps: using medical-grade TPU solution as spinning solution, spinning is performed on the third film layer, the spinning solution flow rate is 7 mL / h, a high-voltage DC power supply is used, the nozzle voltage is 35 kV, the receiving distance is 8 cm, the temperature is 30 °C, the humidity is 50%, the thickness of the sebum film is 0.6 mm, and the fiber diameter of the film layer is 700 nm.

[0092] Comparative Example 4 Comparative Example 4 differs from Example 3 in the following ways: the preparation method of the first membrane fabric includes the following steps: heating coconut oil to 36°C and then spraying it onto the 50g nonwoven fabric; the coating amount of coconut oil is 12g / m². 2 Then, it is wound up by cooling and curing.

[0093] Comparative Example 5 Compared with Example 3, Comparative Example 4 has the following differences: the first membrane fabric contains only 50g of nonwoven fabric; the additives mix all components together without regard to order and then combine them with the first collagen solution and polyvinyl alcohol solution; the second connecting layer is spun directly on the first membrane fabric.

[0094] Table 2 Performance test results of Examples 1-5

[0095] Among them, wet tensile strength was tested according to GB / T465.2, moisture permeability was tested according to GB / T16928, air permeability was tested according to GB / T5453-2007, and the detection of total bacterial count, mold and yeast count was carried out according to the 2015 edition of "Cosmetic Safety Technical Specifications".

[0096] As can be seen from the performance test results of Examples 1-5 in Table 2, in the test items, the skin layer can improve the overall tensile strength, elongation at break and wet tensile strength. In addition, the second connecting layer is connected to the first membrane fabric through a spinning process, which can also improve the overall physical properties. The fiber diameter of the skin layer and the second connecting layer makes the membrane fabric have high porosity, thus achieving corresponding effects on moisture permeability and air permeability. In addition, the components in the additives, the coconut oil on the first membrane fabric, and the diameter of the skin layer can effectively reduce the contact of bacteria with human skin after penetrating the skin layer and the nanofiber composite membrane, thereby achieving the effect of antibacterial and anti-infection.

[0097] The membrane fabrics in Examples 1-5 adopt a structure that mimics the physiological structure of human skin. The nanofiber composite membrane has small fiber diameter and high porosity, and is highly hydrophilic and efficient in preserving activity. The effective ingredients of the nanofiber composite membrane can dissolve rapidly and be quickly absorbed through the skin. It adopts a sebum membrane that mimics human skin, which can effectively lock in moisture and collagen, moisturize the skin, tighten and reduce wrinkles. The sebum membrane can play a highly effective role in isolating bacteria and resisting infection, becoming a new "protective wall" for the skin.

[0098] The preparation methods of Examples 1-5 are controllable and precise, ensuring that the membrane is thin and comfortable, fits well without burden, and that no preservatives are added during the preparation process, and that the raw materials used do not irritate the skin.

[0099] Examples 1-5 can be used to provide moisturizing effects to the skin. Their soft, comfortable texture adheres closely to the skin, providing a feeling of comfort and relaxation. The moisturizing ingredients of this invention are quickly absorbed by the skin, restoring its hydration in a short time and enhancing user satisfaction.

[0100] Table 3 shows the performance test results of Comparative Examples 1-5.

[0101] By comparing the performance test results of Comparative Examples 1-5 in Table 3 with the performance test results of Example 3 in Table 2, it can be seen that: Compared with Comparative Example 1 and Example 3, although the second connecting layer has a smaller diameter, the sebum film of Example 3 has a smaller fiber diameter than the nonwoven fabric of Comparative Example 1, thereby forming a highly efficient antibacterial and anti-infection effect. As a result, the total number of colonies, mold and yeast in Comparative Example 1 is relatively higher, and the porosity of Comparative Example 1 is smaller, thus affecting the moisture permeability and air permeability, which are inferior to those of Example 3.

[0102] Comparing Comparative Example 2 and Example 3, in an environment with a temperature of 30°C and a humidity of 50%, when the spinning solution of the second connecting layer acts on the first membrane, some of the coconut oil on the first membrane will turn into liquid and be lost. During use, due to the loss of the carrier of small-molecule coconut oil and active ingredients such as lauric acid, the release of other active substances is slowed down. The higher humidity reduces the evaporation of the spinning solution, affecting the fiber diameter of the second connecting layer. This leads to a weakening of the connection effect between the second connecting layer and the third membrane layer and the skin layer, resulting in a decrease in porosity and a relatively higher total number of colonies, molds, and yeasts.

[0103] Comparing Comparative Example 3 and Example 3, in an environment with a temperature of 30°C and a humidity of 50%, when the medical TPU solution is used as a spinning solution on the third membrane layer, heat is transferred from the third membrane layer to the second connecting layer. Some of the coconut oil in the second connecting layer becomes liquid and is lost. During use, due to the loss of the carrier of small-molecule coconut oil and active ingredients such as lauric acid, the release of other active substances is slowed down. The higher humidity reduces the evaporation of the spinning solution, affecting the fiber diameter of the second connecting layer, resulting in a decrease in porosity and a relatively higher total number of colonies, molds, and yeasts.

[0104] Comparing Comparative Example 4 and Example 3, their performance is not significantly different. However, in terms of user experience, Comparative Example 4 has too much coconut oil applied, resulting in an oily and uncomfortable feeling when the membrane is applied to the skin. The effective ingredients of the second connecting layer and the third membrane layer cannot be quickly transferred to the skin, resulting in a poor user experience.

[0105] Compared with Example 3, Comparative Example 5, after mixing all the additives, caused some of the macromolecular recombinant type III collagen and elastin to clump together. At the same time, some dipeptide diaminobutyryl benzylamide diacetate and tetradecylaminobutyryl urea trifluoroacetate caused some of the recombinant type III collagen and elastin in the additives to precipitate out, thereby reducing the effective components in the additives. This affected the antibacterial effect of tetradecylaminobutyryl urea trifluoroacetate, resulting in a relatively higher total number of colonies and mold and yeast. Since some of the additive components clumped and precipitated during spinning of the second connecting layer, it caused nozzle blockage or uneven spraying, affecting the porosity of the second connecting layer.

[0106] The above description is a preferred embodiment of the present invention. For those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A membrane fabric, characterized in that, The invention includes a nanofiber composite membrane and a sebum membrane. The nanofiber composite membrane comprises a first membrane fabric, a second connecting layer connected to the first membrane fabric, and a third membrane layer connected to the second connecting layer. The sebum membrane is connected to the third membrane layer. The second connecting layer is formed by electrospinning a spinning solution composed of a first collagen solution, a polyvinyl alcohol solution, and additives, and has a thickness of 0.5-0.8 mm. The third membrane layer is prepared by freeze-drying a second collagen solution and a collagen peptide solution, and has a thickness of 0.5-1.5 mm. The sebum membrane is formed on the third membrane layer by electrospinning a medical-grade TPU solution, and the fiber diameter of the sebum membrane is 50-230 nm, and the thickness of the sebum membrane is 0.2-0.5 mm. The raw materials for preparing the membrane fabric, calculated by parts by weight, include the following components: 25-35 parts of the first collagen solution; 10-20 parts of polyvinyl alcohol solution; 5-10 parts of auxiliary agent; 20-30 parts of the second collagen solution; 5-10 parts of collagen peptide dissolving solution; 15-25 parts of medical-grade TPU solution; The first membrane fabric comprises a nonwoven fabric and coconut oil coated on the nonwoven fabric, wherein the coating amount of coconut oil is 3-5 g / m². 2 The preparation method of the first membrane includes the following steps: heating coconut oil to 30-40°C and then spraying it onto the nonwoven fabric, and then cooling and curing it before winding it up.

2. The membrane fabric according to claim 1, characterized in that: The preparation method of the second connecting layer includes the following steps: a first collagen solution, a polyvinyl alcohol solution and an auxiliary agent are compounded and then spun; a first membrane cloth is used as the base cloth for receiving; the spinning solution flow rate is 1-5 mL / h; a high-voltage DC power supply is used; the nozzle voltage is 15-20 kV; the receiving distance is 18-25 cm; the temperature is 22℃-24℃; and the humidity is 35%-40%.

3. The membrane fabric according to claim 1, characterized in that: The preparation method of the sebum film includes the following steps: using medical-grade TPU solution as spinning solution, spinning is performed on the third film layer, the spinning solution flow rate is 4-9 mL / h, a high-voltage DC power supply is used, the nozzle voltage is 30-40 kV, the receiving distance is 12-15 cm, the temperature is 22℃-24℃, and the humidity is 35%-40%.

4. The method for preparing the membrane fabric according to any one of claims 1-3, characterized in that, Includes the following steps: S1. After mixing the first collagen solution with the polyvinyl alcohol solution, add the auxiliary agent to form a compound solution and spin it, and use the first membrane cloth as the base cloth to receive and form the second connecting layer. S2. On the second connecting layer prepared in S1, the third film layer is pressed together to form a nanofiber composite film. S3. Using medical-grade TPU solution as a spinning solution, spin the nanofiber composite membrane prepared in S2 to form a sebum film, thus obtaining the membrane fabric.

5. The method for preparing the membrane fabric according to claim 4, characterized in that, The fiber diameter of the second connecting layer obtained by spinning in step S1 is 100 nm to 800 nm.

6. The application of the membrane fabric as described in any one of claims 1-3, characterized in that, The membrane is used to provide moisturizing effects to the skin.

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