Preparation method of elastic film cloth, product and application thereof

Abstract

The application relates to a preparation method of an elastic film cloth and products and applications thereof, and the preparation method comprises the following steps: punching an elastic layer, and then combining the elastic layer with a skin-friendly layer through a water jet process to obtain the elastic film cloth; the material of the elastic layer is PU fiber; the pore diameter after punching is 0.5-3 mm; the material of the skin-friendly layer comprises any one or a combination of at least two of pure cotton fiber, lyocell fiber, viscose fiber, bamboo fiber or cuprammonium fiber; and the water jet process is an eight-way water jet process. The preparation method of the application does not use any glue such as an adhesive, and by controlling the reciprocal of the water jet process and the punching pore diameter of the elastic layer, the fibers of different layers can be mutually entangled and combined to form an organic whole, so that delamination is avoided.

Description

Technical Field

[0001] This invention belongs to the field of facial mask fabric technology, specifically relating to a method for preparing an elastic mask fabric, its products, and applications. Background Technology

[0002] As a convenient and efficient skincare carrier, the mask sheet, its core component, plays a crucial role in carrying the essence, adhering to the skin, and promoting the penetration of active ingredients. The manufacturing process of the mask sheet directly determines its skin-friendliness, breathability, liquid-locking ability, and safety, thus affecting the overall skincare effect. With consumers' increasing demands for skincare experience and product safety, the manufacturing technology of mask sheets has been extensively researched and developed. Currently, most mask sheets on the market are made from raw materials such as cellulose fiber, PU fiber, and bamboo fiber, through processes such as carding, web laying, reinforcement, and lamination.

[0003] In existing mask fabric manufacturing processes, adhesives (commonly known as "glue") are often added to achieve fiber entanglement and reinforcement, composite bonding of different fiber layers, or fixation of functional components on the mask fabric. This is currently a common technical method in the industry. Commonly used adhesives include chemically synthesized adhesives (such as acrylic adhesives), hot melt adhesives (such as PUR hot melt adhesives), and modified natural adhesives (such as lignin-based adhesives). Among these, chemically synthesized adhesives are widely used in the manufacturing process of various mask fabrics due to their high bonding strength, low cost, and convenient application. Even some mask fabric manufacturing processes that claim to be "glue-free" often require a small amount of adhesive to assist in interlayer bonding or fixation of functional components, making it difficult to completely eliminate the dependence on glue.

[0004] However, the extensive use of adhesives in the production of facial mask sheets presents numerous insurmountable technical defects, severely impacting the product quality and safety of the masks. Specifically, these defects manifest in several ways: First, adhesives often contain volatile organic compounds (VOCs), residual monomers, preservatives, and other irritating components. These components tend to remain on the surface of the mask sheet, and when in prolonged contact with the skin, they may penetrate the skin's surface, causing discomfort such as skin sensitivity, redness, and itching. This makes the mask particularly unsuitable for people with sensitive skin or other special needs, posing a potential safety hazard. Furthermore, some adhesive components may be absorbed through the skin, indirectly affecting human health.

[0005] Secondly, the presence of glue will clog the natural pores between the fibers of the mask sheet, significantly reducing the breathability and moisture permeability of the mask sheet, causing a stuffy feeling when the mask sheet is applied to the skin. At the same time, it will hinder the penetration of the essence and the absorption of the skin's effective ingredients, weakening the skin care efficacy of the mask. In addition, glue will also reduce the skin-friendliness of the mask sheet, making the mask sheet harder and affecting the comfort of use.

[0006] Furthermore, the adhesive has poor compatibility with the mask fabric fibers. After prolonged storage or contact with essence, it is prone to delamination, separation, and linting, affecting the structural stability and lifespan of the mask fabric. Additionally, the evenness of adhesive application is difficult to control precisely, easily leading to overly tight or loose bonding in parts of the mask fabric, further impacting product consistency. Therefore, providing a simpler method for preparing mask fabric that does not use chemical adhesives is essential. Summary of the Invention

[0007] In view of the shortcomings of the prior art, the purpose of this invention is to provide a method for preparing elastic membrane fabric, as well as its products and applications.

[0008] To achieve this objective, the present invention adopts the following technical solution: In a first aspect, the present invention provides a method for preparing an elastic membrane fabric, the method comprising: perforating an elastic layer and then bonding it to a skin-friendly layer by a hydroentangling process to obtain the elastic membrane fabric; The elastic layer is made of PU fiber; The diameter of the hole after drilling is 0.5-3mm (for example, it can be 0.6 mm, 0.8 mm, 1 mm, 1.2 mm, 1.5 mm, 1.8 mm, 2 mm, 2.2 mm, 2.5 mm or 2.8 mm, etc.). The material of the skin-friendly layer includes any one or a combination of at least two of the following: pure cotton fiber, lyocell fiber, viscose fiber, bamboo fiber, or cupro fiber. The hydroentangling process is an eight-stage hydroentangling process.

[0009] The preparation method of this invention does not use any adhesives or glues. By controlling the number of hydroentangling processes and the perforation diameter of the elastic layer, the fibers of different layers can be intertwined and bound together to form an organic whole, thereby avoiding delamination. In addition, by controlling the size of the perforated pores, not only can the bonding strength and elasticity between the layers be improved, but good essence channels can also be preserved, thus making the membrane absorb essence better. When the pore size is too large, the elasticity of the membrane cannot be well preserved; when the pore size is too small, the entanglement and bonding strength of the fibers are insufficient, and a good whole cannot be formed.

[0010] Preferably, the elastic membrane fabric has a two-layer or three-layer structure. When it has a three-layer structure, the elastic layer is the middle layer and the two sides are skin-friendly layers.

[0011] Preferably, the proportion of longitudinally distributed fibers in the skin-friendly layer is 60%-80% (e.g., 62%, 64%, 66%, 68%, 70%, 72%, 74%, 76%, or 78%), and the proportion of transversely distributed fibers is 20%-40% (e.g., 22%, 24%, 26%, 28%, 30%, 32%, 34%, 36%, or 38%).

[0012] Preferably, the fineness of the fibers used in the skin-friendly layer is 0.4 dtex-1.7 dtex (for example, it can be 0.5 dtex, 0.6 dtex, 0.7 dtex, 0.8 dtex, 0.9 dtex, 1 dtex, 1.1 dtex, 1.2 dtex, 1.3 dtex, 1.4 dtex, 1.5 dtex or 1.6 dtex, etc.), and more preferably 0.45 dtex-0.8 dtex.

[0013] Preferably, the skin-friendly layer is made of viscose fiber and bamboo fiber.

[0014] Preferably, the mass ratio of viscose fiber to bamboo fiber is 1:(0.1-0.5), for example, it can be 1:0.15, 1:0.2, 1:0.25, 1:0.3, 1:0.35, 1:0.4 or 1:0.45, etc.

[0015] Preferably, the basis weight of the skin-friendly layer is 20-50 g / m². 2 For example, it can be 25 g / m 2 30 g / m 2 35 g / m 2 40 g / m 2 Or 45 g / m 2 wait.

[0016] Preferably, the basis weight of the elastic interlayer is 10-20 g / m³. 2 For example, it can be 11 g / m 2 13 g / m 2 15g / m 2 17 g / m 2 Or 19 g / m 2 wait.

[0017] Preferably, the hydroentangling pressure in the hydroentangling process is 0.1-11 MPa, for example, it can be 0.2 MPa, 0.4 MPa, 0.6 MPa, 0.8 MPa, 1 MPa, 1.5 MPa, 2 MPa, 2.5 MPa, 3 MPa, 3.5 MPa, 4 MPa, 4.5 MPa, 5 MPa, 5.5 MPa, 6 MPa, 6.5 MPa, 7 MPa, 7.5 MPa, 8 MPa, 8.5 MPa, 9 MPa, 9.5 MPa, 10 MPa or 10.5 MPa, etc.

[0018] Preferably, in the eight-stage hydroentangling process, the pressure of the first hydroentangling stage is 0.1-0.6 MPa, the pressure of the second hydroentangling stage is 2-4 MPa, the pressure of the third hydroentangling stage is 3-6 MPa, the pressure of the fourth hydroentangling stage is 6-9 MPa, the pressure of the fifth hydroentangling stage is 7-9 MPa, the pressure of the sixth hydroentangling stage is 7-10 MPa, the pressure of the seventh hydroentangling stage is 8-11 MPa, and the pressure of the eighth hydroentangling stage is 2-5 MPa.

[0019] In this invention, by controlling the hydroentangling pressure of different numbers of passes, the bonding effect of the membrane fabric can be improved, resulting in a smoother and finer final product. The hydroentangling pressure of passes one through seven gradually increases, which makes the fibers more saturated and denser, and the skin-friendly layer and elastic layer are more tightly bonded, forming an organic whole that will not separate when exposed to water. The hydroentangling pressure of the eighth pass is reduced to make the fabric surface smoother and finer, improving the skin feel.

[0020] Preferably, the eighth hydroentangling process is followed by drying.

[0021] Preferably, the drying temperature is 60-95℃, for example, it can be 61℃, 63℃, 65℃, 67℃, 69℃, 70℃, 72℃, 74℃, 76℃, 78℃, 80℃, 82℃, 84℃, 86℃, 88℃, 90℃, 92℃ or 94℃, etc.

[0022] Preferably, the drying process is performed in five stages.

[0023] Preferably, the temperatures for the first to third drying stages are each independently 70-95°C.

[0024] Preferably, the temperature for the fourth and fifth drying cycles is 60-70°C, respectively.

[0025] This invention employs a five-stage low-temperature drying process, which ensures that the moisture content of the membrane fabric meets the standard without over-drying and causing the membrane fabric to harden.

[0026] In a second aspect, the present invention provides an elastic membrane fabric, which is prepared by the preparation method described in the first aspect.

[0027] Thirdly, the present invention provides an application of an elastic membrane fabric prepared by the method described in the first aspect or the elastic membrane fabric described in the second aspect in the preparation of a face mask.

[0028] Other specific point values ​​within the range of the above values ​​can be selected, and will not be elaborated on here.

[0029] Compared with the prior art, the present invention has the following beneficial effects: The preparation method of this invention does not use any adhesives or glues. By controlling the reciprocal of the hydroentangling process and the perforation diameter of the elastic layer, the fibers of different layers can be intertwined and bound together to form an organic whole, thereby avoiding delamination. In addition, by controlling the size of the perforated pores, not only can the bonding strength and elasticity between the layers be improved, but also good essence channels can be preserved, thus making the membrane absorb essence better. When the pore size is too large, the elasticity of the membrane cannot be well preserved; when the pore size is too small, the entanglement and bonding strength of the fibers are insufficient, and a good whole cannot be formed. Detailed Implementation

[0030] To further illustrate the technical means and effects of the present invention, the following describes the technical solution of the present invention in conjunction with preferred embodiments of the present invention. However, the present invention is not limited to the scope of the embodiments.

[0031] The raw materials used in the following examples and comparative examples can be used as long as they are purchased from authorized distributors.

[0032] Example 1 This embodiment provides an elastic membrane fabric, the preparation method of which is as follows: (1) Preparation of elastic layer: PU fiber was selected as the material of elastic layer, and the elastic layer was perforated to control the pore size to 1.5 mm; the basis weight of elastic layer was 15 g / m³. 2 ; (2) Preparation of the skin-friendly layer: A mixture of viscose fiber and bamboo fiber (mass ratio of 1:0.3) was selected as the material for the skin-friendly layer. The proportion of longitudinally distributed fibers in the skin-friendly layer was controlled to be 70%, and the proportion of transversely distributed fibers was controlled to be 30%. The fiber fineness was 0.6 dtex, and the basis weight of the skin-friendly layer was 35 g / m². 2 ; (3) Hydroentangle composite: The elastic layer and the skin-friendly layer are combined using an eight-stage hydroentangle process; the hydroentangle pressure of each stage is as follows: 0.3 MPa for the first stage, 3 MPa for the second stage, 4.5 MPa for the third stage, 7.5 MPa for the fourth stage, 8 MPa for the fifth stage, 8.5 MPa for the sixth stage, 9.5 MPa for the seventh stage, and 3.5 MPa for the eighth stage; (4) Drying treatment: After the eighth hydroentangling process is completed, the material is dried through 5 drying modules in sequence. The drying temperature of the first module is 85℃, the drying temperature of the second module is 80℃, the drying temperature of the third module is 75℃, the drying temperature of the fourth module is 70℃, and the drying temperature of the fifth module is 65℃. After the whole process is completed, the material is naturally cooled and shaped to obtain elastic film fabric.

[0033] Example 2 This embodiment provides an elastic membrane fabric, the preparation method of which is as follows: (1) Preparation of elastic layer: PU fiber was selected as the material of elastic layer, and the elastic layer was perforated to control the pore size to be 0.5 mm; the basis weight of elastic layer was 10 g / m 2 .

[0034] (2) Preparation of the skin-friendly layer: A mixture of viscose fiber and bamboo fiber (mass ratio 1:0.5) was selected as the material for the skin-friendly layer. The proportion of longitudinally distributed fibers in the skin-friendly layer was controlled to be 60%, and the proportion of transversely distributed fibers was controlled to be 40%. The fiber fineness was 0.45 dtex, and the basis weight of the skin-friendly layer was 20 g / m². 2 .

[0035] (3) Hydroentangle composite: The elastic layer and the skin-friendly layer are combined using an eight-stage hydroentangle process. The hydroentangle pressure of each stage is as follows: 0.1 MPa for the first stage, 2 MPa for the second stage, 3 MPa for the third stage, 6 MPa for the fourth stage, 7 MPa for the fifth stage, 7 MPa for the sixth stage, 8 MPa for the seventh stage, and 2 MPa for the eighth stage. (4) Drying treatment: After the eighth hydroentangling process is completed, the fabric is dried in five drying modules in sequence. The drying temperature of the first to third modules is 75℃, and the drying temperature of the fourth to fifth modules is 65℃. After the whole process is completed, the fabric is naturally cooled and shaped to obtain the elastic film fabric.

[0036] Example 3 This embodiment provides an elastic membrane fabric, the preparation method of which is as follows: (1) Preparation of elastic layer: PU fiber was selected as the material of elastic layer, and the elastic layer was perforated to control the pore size to 3mm; the basis weight of elastic layer was 20g / m 2 ; (2) Preparation of the skin-friendly layer: A mixture of viscose fiber and bamboo fiber (mass ratio of 1:0.2) was selected as the material for the skin-friendly layer. The proportion of longitudinally distributed fibers in the skin-friendly layer was controlled to be 80%, and the proportion of transversely distributed fibers was controlled to be 20%. The fiber fineness was 0.8 dtex, and the basis weight of the skin-friendly layer was 50 g / m². 2 ; (3) Hydroentangle composite: The elastic layer and the skin-friendly layer are combined using an eight-stage hydroentangle process. The hydroentangle pressure of each stage is as follows: 0.6 MPa for the first stage, 4 MPa for the second stage, 6 MPa for the third stage, 9 MPa for the fourth stage, 9 MPa for the fifth stage, 10 MPa for the sixth stage, 11 MPa for the seventh stage, and 5 MPa for the eighth stage. (4) Drying treatment: After the eighth hydroentangling process is completed, the material is dried through 5 drying modules in sequence. The drying temperature of the first to second modules is 95℃, the drying temperature of the third module is 80℃, and the drying temperature of the fourth to fifth modules is 65℃. After the whole process is completed, the material is naturally cooled and shaped to obtain the elastic film cloth.

[0037] Example 4 This embodiment provides an elastic membrane fabric. The preparation method of the elastic membrane fabric differs from that of Embodiment 1 only in that the pressure of the eight hydroentangling processes is 7.5 MPa, the drying conditions are the same as those in Embodiment 1, and the remaining steps are the same as those in Embodiment 1.

[0038] Example 5 This embodiment provides an elastic membrane fabric. The preparation method of the elastic membrane fabric differs from that of Embodiment 1 only in that the pressures of the eight hydroentangling processes are 3.5 MPa, 9.5 MPa, 8.5 MPa, 8 MPa, 7.5 MPa, 4.5 MPa, 3 MPa and 0.3 MPa, respectively, the drying conditions are the same as those in Embodiment 1, and the remaining steps are the same as those in Embodiment 1.

[0039] Example 6 This embodiment provides an elastic membrane fabric. The difference between the preparation method of the elastic membrane fabric and that of Embodiment 1 is that only one drying treatment is performed after the completion of the eighth hydroentangling process, and the drying temperature is 85°C. The remaining steps are the same as those in Embodiment 1.

[0040] Example 7 This embodiment provides an elastic membrane fabric. The preparation method of the elastic membrane fabric differs from that of Embodiment 1 only in that the drying temperature of the first to fifth modules is 55°C, and the remaining steps are the same as those in Embodiment 1.

[0041] Example 8 This embodiment provides an elastic membrane fabric. The preparation method of the elastic membrane fabric differs from that of Embodiment 1 only in that the drying temperature of the first to fifth drying modules is 100°C, and the remaining steps are the same as those in Embodiment 1.

[0042] Example 9 This embodiment provides an elastic membrane fabric. The preparation method of the elastic membrane fabric differs from that of Embodiment 1 only in that: viscose fiber is selected as the skin-friendly layer material, and the longitudinal and transverse distribution of the fiber, the fiber fineness and the basis weight are kept consistent with those of Embodiment 1. The remaining steps are the same as those of Embodiment 1.

[0043] Example 10 This embodiment provides an elastic membrane fabric. The preparation method of the elastic membrane fabric differs from that of Embodiment 1 only in that bamboo fiber is selected as the skin-friendly layer material, and the longitudinal and transverse distribution of the fiber, the fiber fineness and the basis weight are kept consistent with those of Embodiment 1. The remaining steps are the same as those of Embodiment 1.

[0044] Comparative Example 1 This comparative example provides an elastic membrane fabric. The preparation method of the elastic membrane fabric differs from that of Example 1 only in that: the hydroentangling process adopts a six-stage hydroentangling process, and the hydroentangling pressure of each stage is 0.3 MPa, 3 MPa, 4.5 MPa, 7.5 MPa, 8 MPa and 8.5 MPa respectively. The drying conditions are the same as those in Example 1, and the remaining steps are the same as those in Example 1.

[0045] Comparative Example 2 This comparative example provides an elastic membrane fabric. The only difference between the preparation method of the elastic membrane fabric and that of Example 1 is that the pore diameter after perforation of the elastic layer is 0.3 mm. The remaining steps and process parameters are the same as those of Example 1.

[0046] Comparative Example 3 This comparative example provides an elastic membrane fabric. The only difference between the preparation method of the elastic membrane fabric and that of Example 1 is that the pore diameter after perforation of the elastic layer is 3.5 mm. The remaining steps and process parameters are the same as those of Example 1.

[0047] Comparative Example 4 This comparative example provides an elastic membrane fabric, which is prepared by using the same PU fiber elastic layer as in Example 1 (1.5 mm perforation diameter, 15 g / m² weight). 2 ) and the skin-friendly layer (pure cotton fiber, 70% longitudinally, 30% transversely, 0.6 dtex fineness, 35 g / m² weight). 2 The two layers are bonded together using an acrylic adhesive, dried at 85°C for 30 minutes after bonding, and then cooled and set to obtain the elastic film fabric.

[0048] Test Example 1 Test samples: Elastic membrane fabrics provided in Examples 1-10 and Comparative Examples 1-4.

[0049] Test items and test methods (1) Air permeability (mm / s): The air permeability tester is used to test the air permeability performance of the membrane fabric, reflecting the influence of the hydroentanglement process and drying parameters on the pore size of the membrane fabric; the higher the value, the better the air permeability, and there is no stuffiness during use.

[0050] (2) Liquid retention rate (%): Cut each sample into the same size (5cm×5cm), soak them in the same concentration and volume of skin care essence, take them out after soaking for 30 minutes, drain the surface liquid, and calculate the ratio of the mass of essence adsorbed by the sample to the mass of the sample itself; the higher the value, the stronger the liquid retention ability, and the less likely the essence will be lost when it is attached to the skin.

[0051] (3) Skin irritation: 70 volunteers with sensitive skin were randomly divided into 14 groups of 5 people each. Each group of volunteers tried a sample. The sample was cut to the size that fits the face and applied to the face for 20 minutes. The skin was observed for redness, itching, stinging and other discomfort symptoms within 1 hour. The percentage of volunteers without discomfort symptoms was counted. 100% was considered no irritation, 80%-99% was considered mild irritation, and less than 80% was considered significant irritation.

[0052] (4) Structural stability: each sample was immersed in the essence and left at room temperature for 72 hours. The samples were observed to see if they were layered or shed. The samples were divided into three grades: excellent (no abnormalities), qualified (slight shed, no layering), and unqualified (layering or severe shed).

[0053] The results are shown in Table 1-2.

[0054] Table 1 Table 2 As can be seen from the above test results, compared with the membrane fabric obtained by the traditional method in Comparative Example 4, the elastic membrane fabrics prepared in Examples 1-3 can maintain high bonding strength, structural stability and liquid retention rate, and the air permeability is significantly improved and the skin irritation is significantly reduced.

[0055] In Examples 4-8 and Comparative Example 1, due to changes in process parameters, various properties decreased to varying degrees, especially the adhesive strength and air permeability, which decreased significantly, and the structural stability also deteriorated. This indicates that the eight-stage gradient hydroentangling process and five-stage drying process adopted in this invention achieve a firm bond between the elastic layer and the skin-friendly layer, while retaining the pore structure of the membrane fabric, thus taking into account elasticity, skin-friendliness, and safety.

[0056] In Examples 9-10, since the skin-friendly layer is made of only a single type of viscose fiber or bamboo fiber, it cannot simultaneously achieve excellent structural stability and liquid retention rate.

[0057] In Comparative Examples 2-3, the pore size of the elastic layer is not within the limits of this invention, which affects the structural stability and liquid retention rate of the membrane fabric.

[0058] The applicant declares that this invention illustrates a method for preparing an elastic membrane fabric, its product, and its application through the above embodiments. However, this invention is not limited to the above embodiments, meaning that this invention does not necessarily rely on the above embodiments for implementation. Those skilled in the art should understand that any improvements to this invention, equivalent substitutions of raw materials for the product, additions of auxiliary components, and selection of specific methods all fall within the protection and disclosure scope of this invention.

[0059] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0060] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not describe the various possible combinations separately.

Claims

1. A method for preparing an elastic membrane fabric, characterized in that, The preparation method includes: perforating the elastic layer and then combining it with the skin-friendly layer through a hydroentanglement process to obtain the elastic membrane fabric; The elastic layer is made of PU fiber; The diameter of the hole after drilling is 0.5-3mm; The material of the skin-friendly layer includes any one or a combination of at least two of the following: pure cotton fiber, lyocell fiber, viscose fiber, bamboo fiber, or cupro fiber. The hydroentangling process is an eight-stage hydroentangling process.

2. The method for preparing the elastic membrane fabric as described in claim 1, characterized in that, The skin-friendly layer contains 60%-80% longitudinally distributed fibers and 20%-40% transversely distributed fibers. Preferably, the fineness of the fibers used in the skin-friendly layer is 0.4 dtex-1.7 dtex, and more preferably 0.45 dtex-0.8 dtex.

3. The method for preparing the elastic membrane fabric as described in claim 1 or 2, characterized in that, The skin-friendly layer is made of viscose fiber and bamboo fiber.

4. The method for preparing the elastic membrane fabric according to any one of claims 1-3, characterized in that, The weight of the skin-friendly layer is 20-50 g / m². 2 ; Preferably, the basis weight of the elastic interlayer is 10-20 g / m³. 2 .

5. The method for preparing the elastic membrane fabric according to any one of claims 1-4, characterized in that, The hydroentangling pressure in the process is 0.1-11 MPa.

6. The method for preparing the elastic membrane fabric as described in claim 5, characterized in that, In the eight-stage hydroentangling process, the pressure of the first hydroentangling stage is 0.1-0.6 MPa, the pressure of the second hydroentangling stage is 2-4 MPa, the pressure of the third hydroentangling stage is 3-6 MPa, the pressure of the fourth hydroentangling stage is 6-9 MPa, the pressure of the fifth hydroentangling stage is 7-9 MPa, the pressure of the sixth hydroentangling stage is 7-10 MPa, the pressure of the seventh hydroentangling stage is 8-11 MPa, and the pressure of the eighth hydroentangling stage is 2-5 MPa.

7. The method for preparing the elastic membrane fabric as described in claim 6, characterized in that, After the eighth hydroentanglement process is completed, a drying process is performed. Preferably, the drying temperature is 60-95°C.

8. The method for preparing the elastic membrane fabric as described in claim 7, characterized in that, The drying process is carried out in 5 stages; Preferably, the temperatures for the first to third drying stages are each independently 70-95°C; Preferably, the temperature for the fourth and fifth drying cycles is 60-70°C, respectively.

9. An elastic membrane fabric, characterized in that, The elastic membrane fabric is prepared by the preparation method as described in any one of claims 1-8.

10. The use of an elastic membrane fabric prepared by the method described in claims 1-8 or the elastic membrane fabric described in claim 9 in the preparation of a face mask.

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