Tea fiber composite mask cloth and preparation method thereof

Abstract

The present application relates to a kind of tea fiber composite mask cloth and its preparation method, belong to daily cosmetics technical field.The modified tea fiber prepared by mixing silkworm chrysalis protein and tea extract and the modified tea fiber of microcrystalline cellulose are prepared by spunlace composite to have the mask cloth of herringbone line, the mask cloth combines the excellent antioxidant, antibacterial property of tea fiber and the skin care of silkworm chrysalis protein fiber, and the water-locking of mask cloth is improved by the tea fiber of microcrystalline cellulose modification treatment, the herringbone line on surface can enhance the structural stability, air permeability, water absorption of mask cloth, to obtain the tea fiber mask cloth with excellent water-locking, antioxidant property.

Description

Technical Field

[0001] This invention belongs to the field of daily cosmetics technology, and relates to a tea fiber composite facial mask cloth and its preparation method. Background Technology

[0002] With the development of the facial mask industry, mask fabrics made primarily of tea fiber have emerged on the market. These tea fiber mask sheets typically use natural tea leaf fibers as raw materials. This type of fiber is natural, pollution-free, and more skin-friendly. Furthermore, tea fiber is rich in tea polyphenols, which have natural antibacterial and antioxidant properties, helping the skin resist environmental damage. Tea fiber mask sheets have strong water absorption properties, quickly absorbing and locking in essence, allowing the skin to fully absorb nutrients. Tea fiber mask sheets are gentle and non-irritating, suitable for all skin types, especially sensitive skin.

[0003] Although tea fiber mask sheets are soft and delicate, they may feel slightly rougher to the touch compared to other materials such as silk. Because tea fiber mask sheets have strong absorbency, they may have some limitations in holding the essence, and some essence may remain in the mask pouch or drip onto areas such as the neck during application.

[0004] Therefore, there is a need to develop a tea fiber facial mask sheet with high water retention and soft, delicate texture. Summary of the Invention

[0005] The purpose of this invention is to provide a tea fiber composite facial mask fabric and its preparation method. The tea fiber composite facial mask fabric prepared by this invention has excellent water-locking and antioxidant properties.

[0006] The objective of this invention can be achieved through the following technical solutions:

[0007] A tea fiber composite facial mask fabric, wherein the tea fiber composite facial mask fabric is composed of tea fiber modified with silkworm pupa protein and tea fiber modified with microcrystalline cellulose;

[0008] The preparation process of the silkworm pupa protein-modified tea fiber is as follows:

[0009] Step 1: At 100-110℃, tea leaves with a mass ratio of 1:(20-25) are mixed evenly with deionized water and extracted for 2 hours. After cooling to room temperature, the mixture is filtered through a nanofiltration membrane with a pore size of 10μm to obtain the filtrate. The filtrate is concentrated into a solid by evaporation and then dried by spray drying equipment to obtain the tea extract.

[0010] Step 2: Dissolve silkworm pupa protein in a 10-14% sodium hydroxide solution to prepare a 15-25% solution. Filter to remove solids to obtain silkworm pupa protein solution. Mix the silkworm pupa protein solution and tea extract at a mass ratio of (0.4-0.6):(1-1.3) and stir evenly. Concentrate and degas at 70-80℃ and 0.01-0.1MPa to form a spinning solution. Spin the spinning solution by wet spinning to obtain silkworm pupa protein modified tea fiber, wherein the spinning speed is 0.1-0.2mL / min.

[0011] As a preferred embodiment of the present invention, the spray drying equipment controls the inlet air temperature at 180-210°C and the exhaust air temperature at 100-110°C during the drying process.

[0012] As a preferred embodiment of the present invention, the specific preparation process of the microcrystalline cellulose-modified tea fiber is as follows:

[0013] 20–25 parts of microcrystalline cellulose were soaked in 70 parts of a 2–4% sodium hydroxide solution for 3–4 hours. After soaking, the dried microcrystalline cellulose was obtained. Tea leaves and deionized water were mixed evenly at a mass ratio of 1:(20–25) at 100–110°C and extracted for 2 hours. After cooling to room temperature, the mixture was filtered through a nanofiltration membrane with a pore size of 10 μm to obtain the filtrate. 20–25 parts of microcrystalline cellulose were soaked in 20–30 parts of the filtrate for 2 hours. The solution was heated to 85°C until the deionized water was completely evaporated. After cooling to room temperature, the obtained solid was dissolved in 1-butyl-2-methylimidazolium chloride and dimethyl sulfoxide at a volume ratio of 1:1. After stirring for 1 hour, the mixture was allowed to stand for degassing at a pressure of 0.01–0.1 MPa to obtain a blended spinning solution. The blended spinning solution was then wet-spun to prepare microcrystalline cellulose-modified tea fiber.

[0014] A method for preparing a tea fiber composite facial mask fabric includes the following steps:

[0015] S1. Open and mix silkworm pupa protein modified tea fiber and microcrystalline cellulose modified tea fiber to obtain mixed tea fiber. Comb the mixed tea fiber to make a fluffy fiber web.

[0016] S2. The fluffy fiber web is pre-wetted, and then the resulting wet fiber web is subjected to the first drum hydroentanglement, the second drum hydroentanglement, and the third flat web hydroentanglement to initially form a hydroentangled nonwoven fabric.

[0017] S3. Rinse and wash the spunlace nonwoven fabric.

[0018] S4. After the debleaching and washing process, the fabric is subjected to a fourth drum hydroentangling process while being passed through a wire mesh for jacquard weaving, forming a texture on the surface of the non-woven fabric.

[0019] S5. The spunlace nonwoven fabric after the spunlace jacquard process is dehydrated under negative pressure and dried by a hot air penetration dryer to prepare the tea fiber composite mask fabric.

[0020] As a preferred technical solution of the present invention, in step S1, the mass ratio of silkworm pupa protein modified tea fiber and microcrystalline cellulose modified tea fiber in the mixed tea fiber is (2-4):(6-8).

[0021] As a preferred technical solution of the present invention, in step S2, the water spun pressure of the first rotating drum water spunting is 0.9-1.0 MPa, the water spun pressure of the second rotating drum water spunting is 12-14 MPa, and the water spun pressure of the third flat net water spunting is 18-20 MPa.

[0022] As a preferred embodiment of the present invention, in step S4, the water piercing pressure of the fourth drum water piercing is 40-45 MPa.

[0023] As a preferred embodiment of the present invention, in step S4, the wire mesh sleeve has a mesh count of 200 and the mesh is diamond-shaped.

[0024] As a preferred embodiment of the present invention, in step S5, the pressure of the negative pressure dehydration is -0.3 to -0.1 MPa, and the time is 30 to 35 min.

[0025] Tea extract is rich in tea polyphenols and flavonoids, which are evenly distributed in the fiber. These extracts can disrupt the cell wall structure of bacteria, inhibit their growth and reproduction, and possess excellent antioxidant properties. Silkworm pupa protein contains a variety of amino acids that can decompose free radicals produced by the human body, helping to eliminate skin fatigue and maintain a youthful appearance. Components such as serine and threonine can delay skin oxidation and maintain the activity of epidermal cells through antioxidant capacity. From a molecular structure perspective, silkworm pupa protein contains hydrophilic groups such as hydroxyl groups, containing natural moisturizing factors that can improve the water-locking properties of the fiber. Treating silkworm pupa protein with an alkaline solution can improve its solubility and dispersibility, and promote the rearrangement of the protein molecular chains. These changes and gaps in the molecular structure improve its spinnability, allowing it to bind more tightly with tea fibers during the spinning process. Silkworm pupa protein fibers have a fine texture, resulting in a delicate and soft feel. Modified tea fibers, prepared by blending them with tea extracts, improve the surface roughness of the fibers, enhance the moisture retention of the membrane, and complement the skin-care and antioxidant functions of silkworm pupa protein fibers with the antibacterial and antioxidant functions of tea fibers, thus improving the overall functionality of the fibers. Furthermore, both silkworm pupa protein fibers and tea fibers are environmentally friendly fibers; silkworm pupa protein fibers are biodegradable, while tea fibers are derived from natural plants.

[0026] Microcrystalline cellulose, as a natural cellulose, possesses high crystallinity, high modulus, and high strength. When used to modify tea fiber, it effectively enhances the physical properties of the tea fiber. By processing microcrystalline cellulose, it fills the voids in the tea fiber, forming a denser structure and thus improving the density of the tea fiber. Microcrystalline cellulose is immersed in tea extract, and after complete evaporation, the tea extract is uniformly loaded onto the microcrystalline cellulose. The resulting solid is dissolved in a mixed solution of 1-butyl-2-methylimidazolium chloride and dimethyl sulfoxide. The ionic liquid maintains the stability of the spinning solution and provides good solubility. Wet spinning is then used to prepare more uniform fibers from the uniformly mixed microcrystalline cellulose and tea extract. Due to the good hygroscopic and breathable properties of microcrystalline cellulose, its introduction into tea fiber improves these properties, thus preventing excessive water absorption that could hinder the effective loading of liquid onto the mask fabric during application.

[0027] In this invention, a diamond-shaped pattern is created on the surface of the prepared mask fabric through hydroentangling and jacquard processes. This diamond-shaped pattern enhances the structural stability of the mask fabric, allowing it to remain flat when applied to the skin and preventing deformation or shifting. This stability helps the mask fabric better conform to the facial contours, ensuring that the essence in the mask is evenly distributed on the skin. Simultaneously, the diamond-shaped pattern increases the breathability of the mask fabric, allowing the skin to maintain some breathing space while wearing the mask. This breathability helps reduce discomfort such as stuffiness and tightness when using a mask, and also increases the contact area between the mask fabric and the skin, thereby enhancing the mask fabric's absorption capacity.

[0028] The beneficial effects of this invention are:

[0029] This invention utilizes modified tea fiber prepared by mixing silkworm pupa protein with tea extract and microcrystalline cellulose-modified tea fiber to prepare a mask fabric with a diamond-patterned texture through hydroentangling. This mask fabric combines the excellent antioxidant and antibacterial properties of tea fiber with the skin-care properties of silkworm pupa protein fiber. The microcrystalline cellulose-modified tea fiber enhances the water-locking ability of the mask fabric, while the diamond-patterned texture on the surface enhances the structural stability, breathability, and water absorption of the mask fabric, thereby obtaining a tea fiber mask fabric with excellent water-locking and antioxidant properties. Detailed Implementation

[0030] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with embodiments, is provided below.

[0031] In the following examples and comparative examples:

[0032] The wire mesh used in the jacquard process has a mesh count of 200 and a diamond-shaped grid.

[0033] Tea leaves: sourced from the Fujian Tea Experimental Base of Shanghai Mianfu Biotechnology Co., Ltd.

[0034] Silkworm pupa protein: purchased from Hebei Qiansheng Biotechnology Co., Ltd., brand: Qiansheng;

[0035] 1-Butyl-2-methylimidazolium chloride: purchased from Shanghai Maclean Biochemical Technology Co., Ltd., product number: B915173;

[0036] Microcrystalline cellulose: purchased from Shanghai Yuanye Biotechnology Co., Ltd., product number: S14009-250g.

[0037] Example 1

[0038] Preparation of silkworm pupa protein-modified tea fiber:

[0039] Step 1: At 100-110℃, tea leaves and deionized water at a mass ratio of 1:20 are mixed evenly and extracted for 2 hours. After cooling to room temperature, the mixture is filtered through a nanofiltration membrane with a pore size of 10μm to obtain the filtrate. The filtrate is concentrated into a solid by evaporation and then dried by spray drying equipment to obtain tea extract. The inlet air temperature is controlled at 180℃ and the exhaust air temperature is 100℃.

[0040] Step 2: Dissolve silkworm pupa protein in a 10% sodium hydroxide solution to prepare a 15% solution. Filter to remove solids to obtain silkworm pupa protein solution. Mix the silkworm pupa protein solution and tea extract at a mass ratio of 0.4:1 and stir evenly. Concentrate and degas at 70℃ and 0.01MPa to form a spinning solution. Wet spin the spinning solution to obtain silkworm pupa protein modified tea fiber at a spinning speed of 0.1mL / min.

[0041] Preparation of microcrystalline cellulose-modified tea fiber:

[0042] Twenty parts of microcrystalline cellulose were soaked in 70 parts of a 2% sodium hydroxide solution for 3 hours. After soaking, the dried microcrystalline cellulose was obtained. Tea leaves and deionized water were mixed evenly at a mass ratio of 1:20 at 100℃ and extracted for 2 hours. After cooling to room temperature, the mixture was filtered through a nanofiltration membrane with a pore size of 10 μm to obtain the filtrate. Twenty parts of microcrystalline cellulose were soaked in 20 parts of the filtrate for 2 hours. The solution was heated to 85℃ until the deionized water was completely evaporated. After cooling to room temperature, the obtained solid was dissolved in 1-butyl-2-methylimidazolium chloride and dimethyl sulfoxide at a volume ratio of 1:1. After stirring for 1 hour, the mixture was allowed to stand for degassing at a pressure of 0.01 MPa to obtain a blended spinning solution. The blended spinning solution was then wet-spun to prepare microcrystalline cellulose-modified tea fiber.

[0043] Preparation of tea fiber composite facial mask fabric:

[0044] S1. Open and mix silkworm pupa protein modified tea fiber and microcrystalline cellulose modified tea fiber in a mass ratio of 2:6 to obtain mixed tea fiber. Comb the mixed tea fiber to make a fluffy fiber web.

[0045] S2. The fluffy fiber web is pre-wetted, and then the resulting wet fiber web is subjected to first drum hydroentangling, second drum hydroentangling, and third flat web hydroentangling to initially form a hydroentangled nonwoven fabric. The hydroentangling pressure of the first drum hydroentangling is 0.9 MPa, the hydroentangling pressure of the second drum hydroentangling is 12 MPa, and the hydroentangling pressure of the third flat web hydroentangling is 18 MPa.

[0046] S3. Rinse and wash the spunlace nonwoven fabric.

[0047] At S4 and 40MPa, the fabric after debleaching and washing is subjected to the fourth drum hydroentangling process while being jacquard through a wire mesh sleeve to form a texture on the surface of the nonwoven fabric.

[0048] S5. The spunlace nonwoven fabric after the spunlace jacquard process is dehydrated under negative pressure at -0.3MPa for 30 minutes, and then dried by a hot air penetration dryer to prepare the tea fiber composite mask fabric.

[0049] Example 2

[0050] Preparation of silkworm pupa protein-modified tea fiber:

[0051] Step 1: At 105℃, tea leaves and deionized water at a mass ratio of 1:22 are mixed evenly and extracted for 2 hours. After cooling to room temperature, the mixture is filtered through a nanofiltration membrane with a pore size of 10μm to obtain the filtrate. The filtrate is concentrated into a solid by evaporation and then dried by spray drying equipment to obtain tea extract. The inlet air temperature is controlled at 190℃ and the exhaust air temperature is 105℃.

[0052] Step 2: Dissolve silkworm pupa protein in a 12% sodium hydroxide solution to prepare a 20% solution. Filter to remove solids to obtain silkworm pupa protein solution. Mix the silkworm pupa protein solution and tea extract at a mass ratio of 0.5:1.1 and stir evenly. Concentrate and degas at 75℃ and 0.05MPa to form a spinning solution. Wet spin the spinning solution to obtain silkworm pupa protein modified tea fiber at a spinning speed of 0.15mL / min.

[0053] Preparation of microcrystalline cellulose-modified tea fiber:

[0054] 22 parts of microcrystalline cellulose were soaked in 70 parts of a 3% sodium hydroxide solution for 3.5 hours. After soaking, the dried microcrystalline cellulose was obtained. Tea leaves and deionized water were mixed evenly at a mass ratio of 1:22 at 105℃ and extracted for 2 hours. After cooling to room temperature, the mixture was filtered through a nanofiltration membrane with a pore size of 10 μm to obtain the filtrate. 22 parts of microcrystalline cellulose were soaked in 25 parts of the filtrate for 2 hours. The solution was heated to 85℃ until the deionized water was completely evaporated. After cooling to room temperature, the obtained solid was dissolved in 1-butyl-2-methylimidazolium chloride and dimethyl sulfoxide at a volume ratio of 1:1. After stirring for 1 hour, the mixture was allowed to stand for degassing at a pressure of 0.01-0.1 MPa to obtain a blended spinning solution. The blended spinning solution was then wet-spun to prepare microcrystalline cellulose modified tea fiber.

[0055] Preparation of tea fiber composite facial mask fabric:

[0056] S1. Open and mix silkworm pupa protein modified tea fiber and microcrystalline cellulose modified tea fiber in a mass ratio of 3:6 to obtain mixed tea fiber. Comb the mixed tea fiber to make a fluffy fiber web.

[0057] S2. The fluffy fiber web is pre-wetted, and then the resulting wet fiber web is subjected to the first drum hydroentangling, the second drum hydroentangling, and the third flat web hydroentangling to initially form a hydroentangled nonwoven fabric. The hydroentangling pressure of the first drum hydroentangling is 0.95 MPa, the hydroentangling pressure of the second drum hydroentangling is 13 MPa, and the hydroentangling pressure of the third flat web hydroentangling is 19 MPa.

[0058] S3. Rinse and wash the spunlace nonwoven fabric.

[0059] At S4 and 43MPa, the fabric after debleaching and washing is subjected to the fourth drum hydroentangling process while being subjected to jacquard process through a wire mesh sleeve to form texture on the surface of the nonwoven fabric.

[0060] S5. The spunlace nonwoven fabric after the spunlace jacquard process is dehydrated under negative pressure at -0.2MPa for 33 minutes, and then dried by a hot air penetration dryer to prepare the tea fiber composite mask fabric.

[0061] Example 3

[0062] Preparation of silkworm pupa protein-modified tea fiber:

[0063] Step 1: At 110℃, tea leaves and deionized water at a mass ratio of 1:25 are mixed evenly and extracted for 2 hours. After cooling to room temperature, the mixture is filtered through a nanofiltration membrane with a pore size of 10μm to obtain the filtrate. The filtrate is concentrated into a solid by evaporation and then dried by spray drying equipment to obtain tea extract. The inlet air temperature is controlled at 210℃ and the exhaust air temperature is 110℃.

[0064] Step 2: Dissolve silkworm pupa protein in a 14% sodium hydroxide solution to prepare a 25% solution. Filter to remove solids to obtain silkworm pupa protein solution. Mix the silkworm pupa protein solution and tea extract at a mass ratio of 0.6:1.3 and stir evenly. Concentrate and degas at 80℃ and 0.1MPa to form a spinning solution. Wet spin the spinning solution to obtain silkworm pupa protein modified tea fiber at a spinning speed of 0.2mL / min.

[0065] Preparation of microcrystalline cellulose-modified tea fiber:

[0066] 25 parts of microcrystalline cellulose were soaked in 70 parts of a 4% sodium hydroxide solution for 4 hours. After soaking, the dried microcrystalline cellulose was obtained. Tea leaves and deionized water were mixed evenly at a mass ratio of 1:25 at 110℃ and extracted for 2 hours. After cooling to room temperature, the mixture was filtered through a nanofiltration membrane with a pore size of 10 μm to obtain the filtrate. 25 parts of microcrystalline cellulose were soaked in 30 parts of the filtrate for 2 hours. The solution was heated to 85℃ until the deionized water was completely evaporated. After cooling to room temperature, the obtained solid was dissolved in 1-butyl-2-methylimidazolium chloride and dimethyl sulfoxide at a volume ratio of 1:1. After stirring for 1 hour, the mixture was allowed to stand for degassing at a pressure of 0.1 MPa to obtain a blended spinning solution. The blended spinning solution was then wet-spun to prepare microcrystalline cellulose modified tea fiber.

[0067] Preparation of tea fiber composite facial mask fabric:

[0068] S1. Open and mix silkworm pupa protein modified tea fiber and microcrystalline cellulose modified tea fiber in a mass ratio of 4:8 to obtain mixed tea fiber. Comb the mixed tea fiber to make a fluffy fiber web.

[0069] S2. The fluffy fiber web is pre-wetted, and then the resulting wet fiber web is subjected to the first drum hydroentangling, the second drum hydroentangling, and the third flat web hydroentangling to initially form a hydroentangled nonwoven fabric. The hydroentangling pressure of the first drum hydroentangling is 1.0 MPa, the hydroentangling pressure of the second drum hydroentangling is 14 MPa, and the hydroentangling pressure of the third flat web hydroentangling is 20 MPa.

[0070] S3. Rinse and wash the spunlace nonwoven fabric.

[0071] At S4 and 45MPa, the fabric after debleaching and washing is subjected to the fourth drum hydroentangling process while being subjected to jacquard process through a wire mesh sleeve to form texture on the surface of the nonwoven fabric.

[0072] S5. The spunlace nonwoven fabric after the spunlace jacquard process is dehydrated under negative pressure at -0.1MPa for 30 minutes, and then dried by a hot air penetration dryer to prepare the tea fiber composite mask fabric.

[0073] Comparative Example 1

[0074] The difference between Comparative Example 1 and Example 2 is that silkworm pupa protein was not used to modify the tea fiber in Comparative Example 1, but all other operations were the same.

[0075] Comparative Example 2

[0076] The difference between Comparative Example 2 and Example 2 is that microcrystalline cellulose was not used to modify the tea fiber in Comparative Example 2, but all other operations were the same.

[0077] Comparative Example 3

[0078] The difference between Comparative Example 3 and Example 2 is that no steel wire mesh was used in Comparative Example 3 for jacquard fabric fabric processing; all other operations were the same.

[0079] Performance testing:

[0080] 1. Antibacterial properties:

[0081] Taking Escherichia coli and Staphylococcus aureus as examples, the specific method refers to GB 15979-2002 to test their antibacterial rate against Escherichia coli and Staphylococcus aureus.

[0082] 2. Antioxidant test: According to GB / T / CCTA 20102-2023 DPPH method, quantitative analysis was performed by spectrophotometry, and the antioxidant capacity was tested by measuring the free radical scavenging rate;

[0083] The results of antibacterial and antioxidant tests on the mask fabrics prepared in Examples 1-3 and Comparative Examples 1-3 are shown in Table 1:

[0084] Table 1

[0085]

[0086] As shown in Table 1, the examples have better antibacterial effects than the comparative examples, indicating that the modified tea fiber prepared by spinning silkworm pupa protein and tea extract has stronger antibacterial and antioxidant properties.

[0087] 3. Water absorption test: The water absorption performance of the mask fabric is tested according to QB / T 2872-2017 "Facial Masks";

[0088] 4. Breathability: According to GB / T 5453-1997, a YG461H fully automatic breathability meter was used at a pressure of 100MPa. The mask fabric was cut into 20cm pieces. 2 The area;

[0089] 5. Water-locking performance test:

[0090] Cut the mask sheet into 5cm x 5cm pieces and weigh them initially, denoted as G0. Immerse the pieces in deionized water at 25℃ for 10 minutes, then remove and weigh them, denoted as G1. Place the pieces in a constant temperature incubator at 37℃ for 1 hour and weigh them again, denoted as G2. Finally, calculate the water retention rate (%) of the pieces: Water retention rate (%) = (G2 - G0) / (G1 - G0).

[0091] The results are shown in Table 2 below:

[0092] Table 2

[0093]

[0094] Based on the above data, the water absorption rate and water retention rate of the composite high moisturizing mask fabrics prepared in Examples 1-3 are significantly higher than those in the comparative examples. According to Comparative Examples 2-3, the tea fiber modified with microcrystalline cellulose and the surface diamond pattern treatment of the mask fabric can effectively improve the water-locking and breathability of the mask fabric.

[0095] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A tea fiber composite facial mask fabric, characterized in that, The tea fiber composite mask cloth is composed of tea fiber modified with silkworm pupa protein and tea fiber modified with microcrystalline cellulose. The preparation process of the silkworm pupa protein-modified tea fiber is as follows: Step 1: At 100~110℃, tea leaves with a mass ratio of 1:(20~25) and deionized water are mixed evenly and extracted for 2 hours. After cooling to room temperature, the mixture is filtered through a nanofiltration membrane with a pore size of 10μm to obtain the filtrate. The filtrate is concentrated into a solid by evaporation and then dried by spray drying equipment to obtain the tea extract. Step 2: Dissolve silkworm pupa protein in a 10-14% sodium hydroxide solution to prepare a 15-25% solution. Filter to remove solids to obtain silkworm pupa protein solution. Mix the silkworm pupa protein solution and tea extract in a mass ratio of (0.4-0.6):(1-1.3) and stir evenly. Concentrate and degas at 70-80℃ and 0.01-0.1MPa to form a spinning solution. Spin the spinning solution by wet spinning to obtain silkworm pupa protein modified tea fiber, wherein the spinning speed is 0.1-0.2mL / min. The specific preparation process of the microcrystalline cellulose-modified tea fiber is as follows: 20-25 parts of microcrystalline cellulose were soaked in 70 parts of a 2-4% sodium hydroxide solution for 3-4 hours. After soaking, the dried microcrystalline cellulose was obtained. Tea leaves and deionized water were mixed evenly at a mass ratio of 1:(20-25) at 100-110℃ and extracted for 2 hours. After cooling to room temperature, the mixture was filtered through a nanofiltration membrane with a pore size of 10 μm to obtain the filtrate. 20-25 parts of microcrystalline cellulose were soaked in 20-30 parts of the filtrate for 2 hours. The solution was heated to 85℃ until the deionized water was completely evaporated. After cooling to room temperature, the obtained solid was dissolved in 1-butyl-2-methylimidazolium chloride and dimethyl sulfoxide at a volume ratio of 1:

1. After stirring for 1 hour, the mixture was allowed to stand for degassing at a pressure of 0.01-0.1 MPa to obtain a blended spinning solution. The blended spinning solution was then used to prepare microcrystalline cellulose modified tea fiber by wet spinning.

2. The tea fiber composite facial mask fabric according to claim 1, characterized in that, During the drying process, the inlet air temperature of the spray drying equipment is controlled at 180~210℃, and the exhaust air temperature is 100~110℃.

3. The method for preparing a tea fiber composite facial mask fabric as described in any one of claims 1-2, characterized in that, Includes the following steps: S1. Open and mix silkworm pupa protein modified tea fiber and microcrystalline cellulose modified tea fiber to obtain mixed tea fiber. Comb the mixed tea fiber to make a fluffy fiber web. S2. The fluffy fiber web is pre-wetted, and then the resulting wet fiber web is subjected to the first drum hydroentanglement, the second drum hydroentanglement, and the third flat web hydroentanglement to initially form a hydroentangled nonwoven fabric. S3. Rinse and wash the spunlace nonwoven fabric. S4. After the debleaching and washing process, the fabric is subjected to a fourth drum hydroentangling process while being passed through a wire mesh for jacquard weaving, forming a texture on the surface of the non-woven fabric. S5. The spunlace nonwoven fabric after the spunlace jacquard process is dehydrated under negative pressure and dried by a hot air penetration dryer to prepare the tea fiber composite mask fabric.

4. The method for preparing the tea fiber composite facial mask fabric according to claim 3, characterized in that, In step S1, the mass ratio of silkworm pupa protein modified tea fiber to microcrystalline cellulose modified tea fiber in the mixed tea fiber is (2~4):(6~8).

5. The method for preparing the tea fiber composite facial mask fabric according to claim 3, characterized in that, In step S2, the water spun pressure of the first rotating drum water spun is 0.9~1.0MPa, the water spun pressure of the second rotating drum water spun is 12~14MPa, and the water spun pressure of the third flat net water spun is 18~20MPa.

6. The method for preparing the tea fiber composite facial mask fabric according to claim 3, characterized in that, In step S4, the water jet pressure of the fourth drum water jet is 40~45MPa.

7. The method for preparing the tea fiber composite facial mask fabric according to claim 3, characterized in that, In step S4, the wire mesh sleeve has a mesh count of 200 and a diamond-shaped grid.

8. The method for preparing the tea fiber composite facial mask fabric according to claim 3, characterized in that, In step S5, the negative pressure dehydration pressure is -0.3 to -0.1 MPa, and the time is 30 to 35 minutes.

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