Double-layer spunlace woven cellulose mask cloth and preparation method thereof

Abstract

The invention discloses double-layer spunlace woven cellulose mask cloth and a preparation method thereof, and relates to the field of masks. A double-layer spunlace woven cellulose mask cloth comprises an upper layer fiber net and a lower layer fiber net which are tightly combined into a whole through a spunlace technology, the upper layer is a binchotan fiber net, the lower layer is a mixed fiber net of modified chitosan fibers and carboxymethylcellulose fibers, and the mixing mass ratio of the modified chitosan fibers to the carboxymethylcellulose fibers is 10%-30%: 70%-90%. Wherein the modified chitosan fiber comprises the following raw materials in parts by weight: 20-30 parts of chitosan fiber; 26 to 45 parts of succinic anhydride; 6 to 11 parts of hyaluronic acid; and 5-9 parts of a blue-green algae extract. The mask cloth of a double-layer structure is designed, the essence bearing capacity of the mask cloth is improved, and meanwhile the mask cloth has good skin attaching performance and safety.

Description

Technical Field

[0001] This invention relates to the field of facial masks, and in particular to a double-layer hydroentangled cellulose facial mask fabric and its preparation method. Background Technology

[0002] Facial masks are a common skincare product, typically consisting of a mask sheet and an essence. When used, the essence is applied to the face through the mask sheet, making the skin soft, naturally radiant, and elastic.

[0003] Most facial mask sheets on the market are single-layered. Single-layered masks are prone to dripping when carrying essence, resulting in essence loss and uneven distribution. In addition, the mask sheet has limited adhesion to the skin, affecting the effective delivery and absorption efficiency of active ingredients.

[0004] Therefore, developing a new type of mask fabric that combines excellent load-bearing capacity, high skin-fittingness, and high safety has become a new trend in the industry. Summary of the Invention

[0005] In order to design a double-layer structured facial mask fabric that can improve the ability of the facial mask fabric to carry essence, while having good skin fit and safety, this application provides a double-layer spunlace cellulose facial mask fabric and its preparation method.

[0006] The technical solution of the double-layer hydrospunlace cellulose facial mask fabric and its preparation method provided in this application is as follows: Firstly, this application provides a double-layer hydrospunlace cellulose facial mask fabric, comprising two layers of fiber webs tightly bonded together by hydrospunlace process, the upper layer being binchotan fiber web and the lower layer being a mixed fiber web of modified chitosan fiber and carboxymethyl cellulose fiber, wherein the mixing mass ratio of modified chitosan fiber and carboxymethyl cellulose fiber is 10%-30%: 70%-90%; The modified chitosan fiber comprises the following raw materials in parts by weight: 20-30 parts chitosan fiber; 26-45 parts of succinic anhydride; Hyaluronic acid 6-11 parts; 5-9 parts of blue-green algae extract.

[0007] By adopting the above technical solution, the mask fabric of this application uses a double-layer fiber web structure, which is tightly bonded through a hydroentangling process. Chitosan fiber and binchotan charcoal fiber both possess certain antibacterial properties, inhibiting bacterial growth and improving the safety of the mask fabric. Carboxymethyl cellulose fiber has good hydrophilicity and moisturizing effects, and a strong capacity to carry essence. All three fibers have good skin affinity and fit. Through complementary performance, the prepared mask fabric has good adsorption and carrying capacity for essence, which is beneficial for the effective transfer and absorption efficiency of active ingredients. Simultaneously, it has high skin adhesion, promotes deep nourishment, and has good safety.

[0008] Succinic anhydride, hyaluronic acid, and blue-green algae extract were selected to modify chitosan, which improved the hydrophilic and moisturizing effect of chitosan. At the same time, it helped to promote the bonding between modified chitosan fibers and carboxymethyl cellulose fibers, thereby improving the durability and mechanical strength of the mask sheet.

[0009] Optionally, carboxymethyl cellulose fibers are made from viscose fibers through carboxymethylation, and the degree of substitution of carboxymethyl cellulose fibers is 0.34-0.45.

[0010] By adopting the above technical solution, the degree of substitution of carboxymethyl cellulose fiber is limited, so that carboxymethyl cellulose fiber can maintain high mechanical strength and will not cause the mask cloth to be sticky or loose. The combination of carboxymethyl cellulose fiber and modified chitosan fiber has excellent moisture absorption, strength and toughness.

[0011] Optionally, the binchotan charcoal fiber mesh is a binchotan charcoal fiber mesh loaded with nano-silver, and the nano-silver has a particle size of 30-50nm.

[0012] By adopting the above technical solution, the loading of nano-silver on binchotan charcoal fiber can further enhance the antibacterial properties of the mask fabric and improve the safety of mask use.

[0013] Optionally, carboxymethyl cellulose fibers are obtained by the following preparation methods: An alkalization reaction was carried out with a sodium hydroxide solution of 3%-6% by mass and viscose fiber. The weight ratio of sodium hydroxide solution to viscose fiber was (3-5):1. The reaction was carried out at 40-45℃ for 60-70 minutes to obtain alkali cellulose fiber. A mixture of chloroacetic acid, ethanol and water is added to alkali cellulose fibers in a weight ratio of (40%-50%):(40%-48%):(10%-12%). The mixture is heated to 65-70℃ and reacted for 2-2.5 hours to obtain carboxymethyl cellulose fiber precursor. The initial carboxymethyl cellulose fiber was washed with a mixture of acetone and water and neutralized with hydrochloric acid. It was then washed again with a mixture of acetone and water and dried to obtain carboxymethyl cellulose fiber.

[0014] By adopting the above technical solution, the viscose fiber is first alkalized with sodium hydroxide, and then the predetermined degree of substitution is achieved by controlling the amount of chloroacetic acid added, so as to obtain carboxymethyl cellulose fiber. The method is simple and suitable for production.

[0015] Optionally, the cyanobacteria extract can be prepared by the following method: Mix the dried cyanobacteria powder with water, and extract the mixture at 80-85℃ for 5-6 hours using a water bath shaker to obtain the cyanobacteria extract. Add ethanol to the cyanobacteria extract, let it stand at 4-6℃ to precipitate, and then collect the precipitate after centrifugation to obtain the cyanobacteria extract.

[0016] By adopting the above technical solution, water and ethanol are used as extraction agents to extract blue-green algae extract, thereby improving the extraction rate of effective components and giving full play to the antioxidant protection and moisturizing properties of blue-green algae extract.

[0017] Optionally, the modified chitosan fibers are prepared by the following method: Chitosan fiber and anhydrous ethanol were mixed, succinic anhydride was added, magnetic stirring was turned on, and the mixture was reacted in a water bath at 40-43℃ for 2-2.5h. After filtration, a solid phase was obtained. The solid phase was washed with ethanol and then dried in an oven at 65-70℃ to obtain succinic anhydride modified chitosan fiber. Blue-green algae extract and hyaluronic acid were dissolved in water and dispersed evenly to obtain a solution. Succinic anhydride modified chitosan fibers were immersed in the solution and kept for 3-4 hours. The solution was then heated to solidify the fibers, thus obtaining modified chitosan fibers.

[0018] By adopting the above technical solution, in the process of modifying chitosan fibers, succinic anhydride is used to introduce carboxyl groups after reaction, and then blue-green algae extract and hyaluronic acid are introduced by impregnation. Through distribution treatment, the chitosan fibers are modified to improve their moisturizing and water absorption properties and their ability to carry essence.

[0019] Optionally, the binchotan charcoal fiber web loaded with nano-silver particles comprises the following raw materials in parts by weight: 25-35 parts binchotan charcoal fiber; 3-8 parts silver nitrate; 2-5 parts surfactant; 7-15 parts reducing agent.

[0020] By adopting the above technical solution, a reducing agent is selected to reduce silver nitrate solution to silver nanoparticles, and the addition of surfactant can promote the loading and bonding of silver nanoparticles on binchotan fibers.

[0021] Optionally, the surfactant may be one or more of cetyltrimethylammonium bromide and sodium dodecyl sulfate, and the reducing agent may be one or more of sodium citrate, proanthocyanidins, and vitamin C.

[0022] Secondly, this application provides a method for preparing a double-layer hydroentangled cellulose facial mask fabric, comprising the following steps: Modified chitosan fiber and carboxymethyl cellulose fiber were mixed in a certain mass ratio and then entangled to obtain composite fiber. The composite fibers and binchotan charcoal fibers are opened, carded, and laid into a web to obtain a fiber web layer. After stacking the fiber web layers, hydroentanglement is performed to obtain a semi-finished product; The semi-finished product is dried to obtain a double-sided membrane fabric.

[0023] Optionally, the hydroentanglement pressure can be set to 150-200 bar.

[0024] By adopting the above technical solution and adjusting the hydroentanglement pressure, the two layers of fiber mesh are firmly bonded and do not easily separate, thereby improving the overall strength and safety of the mask fabric.

[0025] In summary, this application has the following beneficial effects: 1. The mask fabric of this application uses a double-layer fiber web structure, tightly bonded through a hydroentangling process. Chitosan fiber and binchotan charcoal fiber both possess antibacterial properties, inhibiting bacterial growth and improving the safety of the mask fabric. Carboxymethyl cellulose fiber has good hydrophilicity and moisturizing effects, and a strong capacity to carry essence. All three fibers have good skin affinity and fit. Through complementary performance, the prepared mask fabric has excellent essence adsorption and carrying capacity, which is beneficial for the effective transfer and absorption efficiency of active ingredients. Simultaneously, it has high skin adhesion, promotes deep nourishment, and has good safety.

[0026] Succinic anhydride, hyaluronic acid, and green algae extract were selected to modify chitosan, which improved the hydrophilic and moisturizing effect of chitosan. At the same time, it helped to promote the bonding between modified chitosan fibers and carboxymethyl cellulose fibers, thereby improving the durability and mechanical strength of the mask sheet.

[0027] 2. Loading nano-silver onto binchotan charcoal fiber can further enhance the antibacterial properties of the mask sheet and improve the safety of mask use. Detailed Implementation

[0028] The present application will be further described in detail below with reference to Examples 1-6 and Comparative Examples 1-2. Example

[0029] Example 1 A double-layer hydroentangled cellulose facial mask fabric includes two layers of fiber webs tightly bonded together by hydroentanglement process. The upper layer is a binchotan fiber web, and the lower layer is a mixed fiber web of modified chitosan fiber and carboxymethyl cellulose fiber. The mass ratio of modified chitosan fiber to carboxymethyl cellulose fiber is 10%:90%.

[0030] The binchotan charcoal fiber was purchased from Shaoxing Xineng Textile Technology Co., Ltd. Chitosan fiber was purchased from Weifang Runfengda Textile Co., Ltd. Carboxymethyl cellulose fiber is produced by carboxymethylating viscose fiber, wherein the viscose fiber is purchased from Shandong Xuzheng Textile Co., Ltd., and the degree of substitution of carboxymethyl cellulose fiber is 0.34-0.45.

[0031] In this embodiment, the modified chitosan fiber comprises the following raw materials in parts by weight: 20 parts chitosan fiber; 26 parts of succinic anhydride; 6 parts hyaluronic acid; Five portions of blue-green algae extract were purchased from Xi'an Xinhe Biotechnology Co., Ltd.

[0032] Modified chitosan fibers were prepared by the following method: Chitosan fiber and 50 parts of anhydrous ethanol were mixed, succinic anhydride was added, magnetic stirring was turned on, and the mixture was reacted in a water bath at 40°C for 2 hours. After filtration, a solid phase was obtained. The solid phase was washed with ethanol and then dried in an oven at 65°C to obtain succinic anhydride modified chitosan fiber. Blue-green algae extract and hyaluronic acid were dissolved in 65 parts of water and dispersed evenly to obtain a solution. Succinic anhydride modified chitosan fiber was immersed in the solution and kept for 3 hours. It was then heated to solidify and obtain modified chitosan fiber.

[0033] Carboxymethyl cellulose fibers are prepared by the following method: An alkalization reaction was carried out between a 3% sodium hydroxide solution and viscose fiber, with a weight ratio of 5:1 between the sodium hydroxide solution and the viscose fiber. The reaction was carried out at 40°C for 60 minutes to obtain alkali cellulose fiber. A mixture of chloroacetic acid, ethanol, and water was added to alkali cellulose fibers in a weight ratio of 40%:48%:12%. The mixture was heated to 65°C and reacted for 2.5 hours to obtain a primary carboxymethyl cellulose fiber product. The degree of substitution of the carboxymethyl cellulose fiber was verified by testing. The initial carboxymethyl cellulose fiber was washed with a mixture of acetone and water and neutralized with hydrochloric acid. It was then washed again with a mixture of acetone and water and dried to obtain carboxymethyl cellulose fiber.

[0034] This embodiment discloses a method for preparing a double-layer hydroentangled cellulose facial mask fabric, including the following steps: Modified chitosan fiber and carboxymethyl cellulose fiber were mixed in a certain mass ratio and then entangled to obtain composite fiber. The composite fibers and binchotan charcoal fibers are opened, carded, and laid into a web to obtain a fiber web layer. After the fiber web layers are stacked, they are hydroentangled. The hydroentanglement pressure is set to 150 bar to obtain a semi-finished product. The semi-finished product is dried to obtain a double-layered membrane fabric.

[0035] Example 2 A double-layer hydroentangled cellulose facial mask fabric includes two layers of fiber webs tightly bonded together by hydroentanglement process. The upper layer is a binchotan fiber web, and the lower layer is a mixed fiber web of modified chitosan fiber and carboxymethyl cellulose fiber. The mass ratio of modified chitosan fiber to carboxymethyl cellulose fiber is 30%:70%.

[0036] The binchotan charcoal fiber was purchased from Shaoxing Xineng Textile Technology Co., Ltd. Chitosan fiber was purchased from Weifang Runfengda Textile Co., Ltd. Carboxymethyl cellulose fiber is produced by carboxymethylating viscose fiber, wherein the viscose fiber is purchased from Shandong Xuzheng Textile Co., Ltd., and the degree of substitution of carboxymethyl cellulose fiber is 0.34-0.45.

[0037] In this embodiment, the modified chitosan fiber comprises the following raw materials in parts by weight: 30 parts chitosan fiber; 45 parts of succinic anhydride; 11 parts hyaluronic acid; Nine portions of blue-green algae extract were purchased from Xi'an Xinhe Biotechnology Co., Ltd.

[0038] Modified chitosan fibers were prepared by the following method: Chitosan fiber and 70 parts of anhydrous ethanol were mixed, succinic anhydride was added, magnetic stirring was turned on, and the mixture was reacted in a water bath at 43°C for 2.5 hours. After filtration, a solid phase was obtained. The solid phase was washed with ethanol and then dried in an oven at 70°C to obtain succinic anhydride modified chitosan fiber. Blue-green algae extract and hyaluronic acid were dissolved in 115 parts of water and dispersed evenly to obtain a solution. Succinic anhydride modified chitosan fiber was immersed in the solution and kept for 4 hours. It was then heated to solidify and obtain modified chitosan fiber.

[0039] Carboxymethyl cellulose fibers are prepared by the following method: A 6% sodium hydroxide solution was used to carry out an alkalization reaction with viscose fiber. The weight ratio of sodium hydroxide solution to viscose fiber was 3:1. The reaction was carried out at 45℃ for 70 min to obtain alkali cellulose fiber. A mixture of chloroacetic acid, ethanol and water was added to alkali cellulose fiber in a weight ratio of 50%:40%:10%. The mixture was heated to 70°C and reacted for 2 hours to obtain a primary carboxymethyl cellulose fiber. The degree of substitution of the carboxymethyl cellulose fiber was verified by testing. The initial carboxymethyl cellulose fiber was washed with a mixture of acetone and water and neutralized with hydrochloric acid. It was then washed again with a mixture of acetone and water and dried to obtain carboxymethyl cellulose fiber.

[0040] This embodiment discloses a method for preparing a double-layer hydroentangled cellulose facial mask fabric, including the following steps: Modified chitosan fiber and carboxymethyl cellulose fiber were mixed in a certain mass ratio and then entangled to obtain composite fiber. The composite fibers and binchotan charcoal fibers are opened, carded, and laid into a web to obtain a fiber web layer. After the fiber web layers are stacked, they are hydroentangled. The hydroentanglement pressure is set to 200 bar to obtain a semi-finished product. The semi-finished product is dried to obtain a double-sided membrane fabric.

[0041] Example 3 The only difference between this embodiment and Embodiment 1 is that the modified chitosan fiber in the raw materials is different.

[0042] In this embodiment, the modified chitosan fiber comprises the following raw materials in parts by weight: 20 parts chitosan fiber; 26 parts of succinic anhydride; 6 parts hyaluronic acid; Five portions of blue-green algae extract were used, with the blue-green algae extract being self-prepared.

[0043] Blue-green algae extract was prepared by the following method: The dry powder of blue-green algae and water were mixed at a mass ratio of 1:20. The mixture was extracted at 80°C for 6 hours using a water bath shaker with a shaking speed of 180 rpm to obtain the blue-green algae extract. Ethanol was added to the blue-green algae extract at a volume ratio of 1:8. The mixture was allowed to stand at 4°C for 12 hours to precipitate. The precipitate was then collected by centrifugation to obtain the blue-green algae extract.

[0044] The preparation methods for modified chitosan, carboxymethyl cellulose fiber, and mask fabric are the same as in Example 1.

[0045] Example 4 The only difference between this embodiment and Embodiment 1 is that the modified chitosan fiber in the raw materials is different.

[0046] In this embodiment, the modified chitosan fiber comprises the following raw materials in parts by weight: 25 parts chitosan fiber; 37 parts of succinic anhydride; 9 parts hyaluronic acid; Seven portions of blue-green algae extract were used, and the blue-green algae extract was prepared in-house.

[0047] Blue-green algae extract was prepared by the following method: The dry powder of blue-green algae and water were mixed at a mass ratio of 1:20. The mixture was extracted at 85°C for 5 hours using a water bath shaker with a shaking speed of 180 rpm to obtain the blue-green algae extract. Ethanol was added to the blue-green algae extract at a volume ratio of 1:8. The mixture was allowed to stand at 6°C for 12 hours to precipitate. The precipitate was then collected by centrifugation to obtain the blue-green algae extract.

[0048] Modified chitosan fibers were prepared through the following steps: Chitosan fiber and 63 parts of anhydrous ethanol were mixed, succinic anhydride was added, magnetic stirring was turned on, and the mixture was reacted in a water bath at 42°C for 2 hours. After filtration, a solid phase was obtained. The solid phase was washed with ethanol and then dried in an oven at 68°C to obtain succinic anhydride modified chitosan fiber. Blue-green algae extract and hyaluronic acid were dissolved in 98 parts of water and dispersed evenly to obtain a solution. Succinic anhydride modified chitosan fiber was immersed in the solution and kept for 3.5 hours. It was then cured by heat treatment to obtain modified chitosan fiber.

[0049] The preparation methods for carboxymethyl cellulose fibers and facial mask fabrics are the same as those in Example 1.

[0050] Example 5 The difference between this embodiment and Embodiment 3 is that the binchotan charcoal fiber mesh in the raw materials is different.

[0051] In this embodiment, the binchotan charcoal fiber mesh is selected from binchotan charcoal fiber mesh loaded with nano-silver. The nano-silver has a particle size of 30-50nm and includes the following raw materials in parts by weight: 25 parts binchotan charcoal fiber; 3 parts silver nitrate; Two parts of surfactant, the surfactant being hexadecyltrimethylammonium bromide; Seven parts of reducing agent, sodium citrate is selected as the reducing agent.

[0052] The binchotan charcoal fiber web loaded with nano-silver was prepared by the following method: Silver nitrate is dissolved in deionized water, and a mixture of surfactant, reducing agent and ethanol is added to generate nano-silver through a reduction reaction. Binchotan charcoal fibers were soaked in a solution containing silver nanoparticles, stirred and mixed evenly, and then heated at 80°C to evaporate the mixture, thereby achieving the loading of nano-silver onto the binchotan charcoal fibers.

[0053] The preparation methods for modified chitosan, carboxymethyl cellulose fiber, and mask fabric are the same as in Example 3.

[0054] Example 6 The difference between this embodiment and Embodiment 3 is that the binchotan charcoal fiber mesh in the raw materials is different.

[0055] In this embodiment, the binchotan charcoal fiber mesh is selected from binchotan charcoal fiber mesh loaded with nano-silver. The nano-silver has a particle size of 30-50nm and includes the following raw materials in parts by weight: 35 parts binchotan charcoal fiber; 8 parts silver nitrate; Five parts of surfactant, the surfactant being sodium dodecyl sulfate; 15 parts of reducing agent, the reducing agent being proanthocyanidins.

[0056] The preparation methods for modified chitosan, carboxymethyl cellulose fiber, and mask fabric are the same as in Example 3.

[0057] Comparative Example Comparative Example 1 The difference between this comparative example and Example 1 is that the raw material of the mask sheet is different.

[0058] In this comparative example, the double-layer hydroentangled cellulose mask fabric includes two layers of fiber webs tightly bonded together by hydroentanglement process. The upper layer is a binchotan fiber web, and the lower layer is a mixed fiber web of chitosan fiber and carboxymethyl cellulose fiber. The mass ratio of chitosan fiber to carboxymethyl cellulose fiber is 10%:90%.

[0059] The binchotan charcoal fiber was purchased from Shaoxing Xineng Textile Technology Co., Ltd. Chitosan fiber was purchased from Weifang Runfengda Textile Co., Ltd. Carboxymethyl cellulose fiber is produced by carboxymethylating viscose fiber, wherein the viscose fiber is purchased from Shandong Xuzheng Textile Co., Ltd., and the degree of substitution of carboxymethyl cellulose fiber is 0.34-0.45.

[0060] Comparative Example 2 The difference between this comparative example and Example 1 is that the raw material of the mask sheet is different.

[0061] In this comparative example, a double-layer hydroentangled woven cellulose mask fabric includes two layers of fiber webs tightly bonded together by hydroentanglement process. The upper layer is a bamboo pulp fiber web, and the lower layer is a carboxymethyl cellulose fiber web.

[0062] Liquid absorption rate for performance testing: The test was conducted according to the method in GB / T 24218.6-2010 "Textiles - Nonwovens - Test Methods - Part 6 - Determination of absorbency"; Antibacterial properties: According to GB / T 20944.3-2008 "Evaluation of antibacterial properties of textiles - Part 3: Shaking method", the test was conducted by shaking method, and Staphylococcus aureus was selected as the bacteria. Skin fit: The softness of the mask fabric is evaluated by testing its bending properties. Sufficient softness allows the mask fabric to fit the face more closely, resulting in better skin fit. The longitudinal bending stiffness of the mask fabric is tested according to GB / T 18318.1-2009 "Determination of bending properties of textiles - Part 1: Inclined plane method". Lower longitudinal bending stiffness indicates greater longitudinal softness of the mask fabric.

[0063] Table 1 Sample Liquid absorption rate / % Antibacterial properties / % Skin fit / (mN·cm) Example 1 749 87.2 0.42 Example 2 756 86.5 0.41 Example 3 782 86.8 0.41 Example 4 767 87.3 0.40 Example 5 778 94.7 0.40 Example 6 784 95.1 0.39 Comparative Example 1 639 74.5 0.58 Comparative Example 2 573 68.4 0.65 According to the data in Table 1, the mask fabric of this application, by selecting binchotan charcoal fiber and modified chitosan fiber / carboxymethyl cellulose fiber as raw materials and using a specific hydroentangling weaving process, results in a double-layer mask fabric with good moisture absorption and breathability, strong capacity to carry essence, antibacterial properties, and good skin adhesion.

[0064] According to the data in the table, compared with Example 1, Examples 3-4 modified the raw material blue-green algae extract in the modified chitosan fiber. The blue-green algae extract prepared by using a water bath shaker extraction method has higher active ingredients. Therefore, when used in modified chitosan, the blue-green algae extract has a better moisturizing and antioxidant effect, thus significantly improving the liquid absorption rate of the mask cloth.

[0065] Compared to Example 3, Examples 5-6 involve loading nano-silver onto binchotan charcoal fibers in a double-layer fiber web structure. The loading of nano-silver onto the binchotan charcoal fibers further enhances the antibacterial properties of the mask fabric, thereby improving the safety of the mask fabric.

[0066] Based on the comparison of Comparative Examples 1-2 and Example 1, when the modified chitosan fiber of the mask fabric was changed, Comparative Example 1 did not modify the chitosan fiber, and Comparative Example 2 did not add chitosan fiber, but used binchotan charcoal fiber and carboxymethyl cellulose fiber for hydroentangling. The resulting mask fabric showed a significant decrease in liquid absorption rate, antibacterial properties, and skin-fitting properties. This indicates that the modified chitosan fiber and carboxymethyl cellulose fiber used in this application have a good degree of integration, which improves the antibacterial properties, water absorption and moisturizing properties, and softness of the fiber web.

[0067] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this specific embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. A double-layer hydroentangled cellulose facial mask fabric, characterized in that: It consists of two layers of fiber web tightly bonded together by hydroentangling. The upper layer is a binchotan fiber web, and the lower layer is a mixed fiber web of modified chitosan fiber and carboxymethyl cellulose fiber. The mass ratio of modified chitosan fiber to carboxymethyl cellulose fiber is 10%-30%: 70%-90%. The modified chitosan fiber comprises the following raw materials in parts by weight: 20-30 parts chitosan fiber; 26-45 parts of succinic anhydride; Hyaluronic acid 6-11 parts; 5-9 parts of blue-green algae extract.

2. The double-layer hydroentangled woven cellulose mask fabric according to claim 1, characterized in that: Carboxymethyl cellulose fiber is made from viscose fiber through carboxymethylation, and the degree of substitution of carboxymethyl cellulose fiber is 0.34-0.

45.

3. The double-layer hydroentangled woven cellulose facial mask fabric according to claim 1, characterized in that: The binchotan charcoal fiber mesh is a binchotan charcoal fiber mesh loaded with nano-silver, and the nano-silver has a particle size of 30-50nm.

4. The double-layer hydroentangled woven cellulose mask fabric according to claim 2, characterized in that: Carboxymethyl cellulose fibers are obtained through the following preparation method: An alkalization reaction was carried out with a sodium hydroxide solution of 3%-6% by mass and viscose fiber. The weight ratio of sodium hydroxide solution to viscose fiber was (3-5):

1. The reaction was carried out at 40-45℃ for 60-70 min to obtain alkali cellulose fiber. A mixture of chloroacetic acid, ethanol and water is added to alkali cellulose fibers in a weight ratio of (40%-50%):(40%-48%):(10%-12%). The mixture is heated to 65-70℃ and reacted for 2-2.5 hours to obtain carboxymethyl cellulose fiber precursor. The initial carboxymethyl cellulose fiber was washed with a mixture of acetone and water and neutralized with hydrochloric acid. It was then washed again with a mixture of acetone and water and dried to obtain carboxymethyl cellulose fiber.

5. The double-layer hydroentangled cellulose facial mask fabric according to claim 1, characterized in that: Blue-green algae extract was prepared by the following method: Mix the dried cyanobacteria powder with water, and extract the mixture using a water bath shaker at 80-85℃ for 5-6 hours to obtain the cyanobacteria extract. Ethanol was added to the blue-green algae extract, and the mixture was allowed to stand at 4-6℃ to precipitate. The precipitate was then collected by centrifugation to obtain the blue-green algae extract.

6. The double-layer hydroentangled woven cellulose facial mask fabric according to claim 1, characterized in that: Modified chitosan fibers were prepared by the following method: Chitosan fiber and anhydrous ethanol were mixed, succinic anhydride was added, magnetic stirring was turned on, and the mixture was reacted in a water bath at 40-43℃ for 2-2.5h. After filtration, a solid phase was obtained. The solid phase was washed with ethanol and then dried in an oven at 65-70℃ to obtain succinic anhydride modified chitosan fiber. Blue-green algae extract and hyaluronic acid were dissolved in water and dispersed evenly to obtain a solution. Succinic anhydride modified chitosan fibers were immersed in the solution and kept for 3-4 hours. The solution was then heated to solidify the fibers, thus obtaining modified chitosan fibers.

7. The double-layer hydroentangled woven cellulose mask fabric according to claim 3, characterized in that: The binchotan charcoal fiber web loaded with nano-silver particles comprises the following raw materials in parts by weight: 25-35 parts binchotan charcoal fiber; 3-8 parts silver nitrate; 2-5 parts surfactant; 7-15 parts reducing agent.

8. The double-layer hydroentangled woven cellulose facial mask fabric according to claim 7, characterized in that: The surfactant is selected from one or more of cetyltrimethylammonium bromide and sodium dodecyl sulfate, and the reducing agent is selected from one or more of sodium citrate, proanthocyanidins, and vitamin C.

9. A method for preparing a double-layer hydroentangled cellulose facial mask fabric according to any one of claims 1-8, characterized in that, Includes the following steps: Modified chitosan fiber and carboxymethyl cellulose fiber were mixed in a certain mass ratio and then entangled to obtain composite fiber. The composite fibers and binchotan charcoal fibers are opened, carded, and laid into a web to obtain a fiber web layer. After stacking the fiber web layers, hydroentanglement is performed to obtain a semi-finished product; The semi-finished product is dried to obtain a double-sided membrane fabric.

10. The method for preparing a double-layer hydroentangled cellulose facial mask fabric according to claim 9, characterized in that: The hydroentanglement pressure is set to 150-200 bar.