High-moisture-retention mask base cloth and preparation process thereof

Abstract

The application relates to the technical field of mask materials, and discloses a high-moisture-retention mask base cloth and a preparation process thereof; the preparation process comprises the following operation steps: wood pulp, cotton pulp and bamboo pulp are uniformly mixed at a certain proportion, are subjected to a papermaking treatment, and are dried to obtain a loose fiber web; arginine-chitosan and histidine are uniformly mixed into polyethylene glycol to obtain a mixed solution A; zinc acetate is uniformly mixed into 50-55 DEG C polyethylene glycol, is immersed into the loose fiber web, is ultrasonically treated for 5-10 minutes, the mixed solution A is added, and ultrasonic treatment is continuously carried out for 10-20 minutes, the loose fiber web A is taken out, is washed, and is dried to obtain a loose fiber web A; a moisture-retention adhesive glue solution is coated on the surface of the loose fiber web A, and the loose fiber web A is dried to constant weight to obtain the high-moisture-retention mask base cloth.

Description

Technical Field

[0001] This invention relates to the field of facial mask material technology, specifically a high-moisturizing facial mask base fabric and its preparation process. Background Technology

[0002] As a carrier of skincare products, the core performance indicators of a mask base fabric are its moisturizing and antibacterial properties. Traditional mask base fabrics mostly use single fiber materials and rely on external essences to achieve moisturizing, which has problems such as easy moisture loss and easy bacterial growth during storage.

[0003] In existing technologies, humectants such as glycerin are often added to improve water retention, but simple physical mixing can easily lead to the release of components and the effect is short-lived. In terms of antibacterial properties, chemical antibacterial agents are often relied upon, which pose risks of irritation and biocompatibility. Natural polymer materials have become a research hotspot due to their good biocompatibility. Chitosan and lignin have certain moisturizing and antibacterial potential, but chitosan has poor water solubility, and lignin has limited effect when used alone. The bonding stability of the two with the fiber substrate is insufficient, which restricts their application in mask base fabric.

[0004] In conclusion, the preparation of a highly moisturizing mask base fabric is of great significance. Summary of the Invention

[0005] The purpose of this invention is to provide a highly moisturizing facial mask base fabric and its preparation process to solve the problems raised in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A process for preparing a high-moisturizing facial mask base fabric includes the following steps:

[0008] Step 1: (1) Wood fiber, cotton pulp and bamboo fiber are added to deionized water and mixed evenly. They are mechanically loosened and then pulped separately to obtain wood pulp, cotton pulp and bamboo pulp. The wood pulp, cotton pulp and bamboo pulp are mixed evenly in a certain proportion, and then processed and dried to obtain a loose fiber web. (2) Arginine-chitosan and histidine are added to polyethylene glycol at 50-55℃ and mixed evenly to obtain mixture A. The mixture is kept warm for later use. Zinc acetate is added to polyethylene glycol at 50-55℃ and mixed evenly. The loose fiber web is immersed in the mixture and sonicated for 5-10 minutes. Mixture A is added and sonicated for another 10-20 minutes. The mixture is then removed, washed and dried to obtain loose fiber web A.

[0009] Step 2: (1) Add lignin-based gelatin, glycerin, sodium glycerophosphate, and polyethylene glycol A to deionized water at 50-60°C and mix evenly to obtain a moisturizing adhesive solution;

[0010] (2) Set the hydroentanglement pressure to 18-20 bar and the diameter of the water needle outlet to 0.08-0.1 mm; reinforce the loose fiber web A with hydroentanglement to obtain the mask base fabric; coat the surface of the mask base fabric with moisturizing adhesive liquid and dry it at 40-50℃ to constant weight to obtain the high moisturizing mask base fabric.

[0011] In a more optimized manner, the wood pulp contains 40-50 wt% wood fiber; the cotton pulp contains 30-40 wt% cotton pulp meal; the bamboo pulp contains 20-30 wt% bamboo fiber; and the mass ratio of the wood pulp, cotton pulp, and bamboo pulp is (7-11):(5-9):(2-4).

[0012] In a more optimized form, the raw materials of the loose fiber web A include the following components: by mass parts, 0.8–1.7 parts arginine-chitosan, 0.03–0.05 parts zinc acetate, 2–3 parts histidine, and 10–15 parts polyethylene glycol; wherein the molecular weight of the polyethylene glycol is 200–400; the raw materials of the moisturizing adhesive liquid include the following components: by mass parts, 5–7 parts lignin-based gelatin, 12–17 parts glycerol, 1–2 parts sodium glycerophosphate, 2–3 parts polyethylene glycol A, and 70–90 parts deionized water; wherein the molecular weight of the polyethylene glycol A is 2000–4000.

[0013] A more optimized method for preparing arginine-chitosan is as follows: chitosan is added to an acetic acid solution and mixed evenly to obtain a chitosan solution; arginine is added to a MES buffer solution with a pH of 5-5.5, followed by EDC and NHS, and the mixture is stirred for 2-3 hours. The chitosan solution is then added, and the mixture is stirred at 20-35°C until it turns dark brown. The mixture is then dialyzed and freeze-dried to obtain arginine-chitosan.

[0014] In a more optimized form, the arginine-chitosan raw material comprises the following components: by mass parts, 4-6 parts chitosan, 1-2 parts arginine, 3.5-5 parts EDC, 2.7-3 parts NHS, 30-40 parts MES buffer, and 80-90 parts acetic acid solution; the concentration of the acetic acid solution is 1-2 wt%.

[0015] A more optimized method for preparing lignin-based gelatin is as follows: (1) Glutamic acid and glutaraldehyde are added to deionized water to obtain mixture A and mixture B, which are set aside; enzymatically hydrolyzed lignin is added to sodium hydroxide aqueous solution, stirred at 90-95°C for 20-30 minutes, mixture A and mixture B are added dropwise, and the addition is completed within 35-40 minutes. The mixture is refluxed for 3-3.5 hours, dilute hydrochloric acid solution is added dropwise, and the mixture is allowed to stand for 4-5 hours to precipitate solid. The solid is repeatedly washed with deionized water, filtered, and dried to obtain glutamic acid-grafted enzymatically hydrolyzed lignin; (2) EDC·HCl and NHS are added to DMSO and mixed evenly. Glutamic acid-grafted enzymatically hydrolyzed lignin is added at 37-42°C and mixed evenly. The mixture is stirred in the dark for 4-5 hours, aminated gelatin is added, and stirring is continued for 18-20 hours. The mixture is dialyzed in deionized water at 37-42°C and freeze-dried to obtain lignin-based gelatin.

[0016] In a more optimized form, the raw material for the glutamic acid grafted enzymatic hydrolysis of lignin comprises the following components: by mass parts, 1-2 parts enzymatic hydrolysis of lignin, 1-2 parts glutamic acid, 0.8-1.5 parts glutaraldehyde, 30-40 parts deionized water, and 70-80 parts sodium hydroxide aqueous solution; wherein the concentration of sodium hydroxide in the sodium hydroxide aqueous solution is 1-2 wt%.

[0017] In a more optimized form, the raw materials for the lignin-based gelatin include the following components: by mass, 5 parts aminated gelatin, 8-15 parts glutamic acid grafted enzymatic hydrolyzed lignin, 1-3 parts EDC·HCl, 0.5-1.5 parts NHS, and 50-60 parts DMSO.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] In this invention, a fiber web is prepared using wood pulp, cotton pulp, and bamboo pulp as raw materials; then, it is reinforced by hydroentangling to obtain a mask base fabric; in order to improve the moisturizing properties of the mask base fabric, a moisturizing adhesive is applied to the mask base fabric and then dried to obtain a highly moisturizing mask base fabric.

[0020] The moisturizing adhesive contains gelatin, glycerin, sodium glycerophosphate, and polyethylene glycol. In this solution, the gelatin solution dries to form a flexible film, providing mechanical support. Glycerin has strong hygroscopic properties, absorbing environmental moisture to prevent the adhesive from drying too quickly, maintaining a moist state, and reducing the brittleness of the gelatin film, improving its flexibility and extensibility, and preventing cracking. Sodium glycerophosphate, in combination with glycerin, enhances the moisturizing effect, adjusts the pH of the adhesive, improves the stability of the gelatin, and prevents acidic degradation. Polyethylene glycol improves user comfort and helps small molecules pass through biological barriers.

[0021] To further enhance the moisturizing properties of the mask base fabric, the proposed method involves introducing lignin into gelatin to improve the binding between lignin and the mask base fabric, thereby enhancing the water retention and antibacterial properties of the mask base fabric. Specifically, the aldehyde group on glutaraldehyde and the amino group on glutamic acid generate N-hydroxymethylamine, which then condenses with enzymatically hydrolyzed lignin containing active hydrogen atoms to obtain glutamic acid-lignin. The carboxyl groups on the glutamic acid-lignin are activated using EDC·HCl and NHS, reacting with the amino groups on the aminated gelatin to introduce lignin into the gelatin, resulting in lignin-based gelatin. Lignin and glutamic acid possess excellent moisturizing and antibacterial properties, which can synergistically improve the moisturizing properties of the gelatin film, thereby enhancing the moisturizing and antibacterial effects of the mask base fabric.

[0022] However, bacteria can grow on the mask base fabric during storage, affecting its use. Therefore, chitosan is added to the moisturizing adhesive for antibacterial purposes, but the antibacterial effect is limited. To improve the antibacterial effect without affecting the use of the mask base fabric, the solution uses arginine-chitosan, histidine, and zinc acetate as finishing agents to modify the fiber web, giving it antibacterial and moisturizing effects. In particular, to enhance the effect of chitosan and zinc ions, arginine is introduced onto chitosan to obtain arginine-chitosan. The guanidinyl group on arginine-chitosan and the imidazole group on histidine coordinate with the zinc ion on zinc acetate to form MOFs structure, which is beneficial to enhance moisturizing and water-locking properties. Small molecule polyethylene glycol is used as a solvent to enhance the interfacial properties with the moisturizing adhesive, synergistically improving moisturizing and antibacterial properties. Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0024] In the following specific embodiments, "parts" refers to parts by weight. It should be noted that there are no special restrictions on the manufacturers of the raw materials involved in this invention. Exemplary examples include: chitosan (food grade); arginine (CAS number 74-79-3, food grade); glutamic acid (CAS number 56-86-0, food grade); enzymatically hydrolyzed lignin (product number A01095); histidine (CAS number 71-00-1, food grade); glycerol phosphate... The CAS number for sodium glycerol is 17603-42-8 (pharmaceutical grade); the CAS number for glycerol is 56-81-5; the CAS number for EDC (1-(3-dimethylaminopropyl)-3-ethylcarbodiimide) is 1892-57-5; the CAS number for NHS (N-hydroxysuccinimide) is 6066-82-6; and the CAS number for EDC·HCl (1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride) is 25952-53-8.

[0025] The preparation method of aminated gelatin is as follows: 6g of fish skin gelatin is added to 90mL of deionized water, 16mL of ethylenediamine is added, 2.2g of EDC·HCl (1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride) is added, the pH is adjusted to 5, the mixture is stirred for 13 hours, and then placed in a 3.5kDa dialysis bag for dialyzing in deionized water. The mixture is then freeze-dried to obtain aminated gelatin.

[0026] Example 1: A preparation process for a high-moisturizing facial mask base fabric, comprising the following steps:

[0027] Pre-preparation: The preparation method of arginine-chitosan is as follows: 6 parts of chitosan are added to 80 parts of acetic acid solution (acetic acid concentration is 1 wt%) and mixed evenly to obtain chitosan solution; 2 parts of arginine are added to MES buffer (30 parts of MES buffer) at pH 5.5, then 4 parts of EDC and 2.7 parts of NHS are added, and the mixture is stirred for 3 hours. The chitosan solution is then added, and the mixture is stirred at 20℃ until dark brown. The mixture is then dialyzed (using a 3.5 kDa dialysis bag) and freeze-dried to obtain arginine-chitosan.

[0028] The preparation method of lignin-based gelatin is as follows: (1) Add 2 parts of glutamic acid and 1.2 parts of glutaraldehyde to 30 parts of deionized water to obtain mixture A and mixture B, and keep warm for later use; add 2 parts of enzymatically hydrolyzed lignin to 75 parts of sodium hydroxide aqueous solution (the concentration of sodium hydroxide is 1.5wt%), stir at 90℃ for 30 minutes, add mixture A and mixture B dropwise, and finish adding within 40 minutes. Reflux for 3 hours, add dilute hydrochloric acid solution, let stand for 4 hours to precipitate solid, and use... The solid was repeatedly washed with deionized water, filtered and dried to obtain glutamic acid grafted enzymatic hydrolysed lignin; (2) 2 parts EDC·HCl and 1.2 parts NHS were added to 50 parts DMSO and mixed evenly. 10 parts glutamic acid grafted enzymatic hydrolysed lignin were added at 38°C and mixed evenly. The mixture was stirred in the dark for 5 hours. 5 parts aminoated gelatin were added and stirred for 18 hours. The mixture was dialyzed in deionized water at 38°C (dialysis bag with 3.5 kDa) and freeze-dried to obtain lignin-based gelatin.

[0029] Step 1: (1) Wood fiber, cotton pulp and bamboo fiber are added to deionized water and mixed evenly. They are mechanically loosened and then pulped to obtain wood pulp (wood fiber content is 50wt%), cotton pulp (cotton pulp content is 30wt%) and bamboo pulp (bamboo fiber content is 25wt%). The wood pulp, cotton pulp and bamboo pulp are mixed evenly in a mass ratio of 10:7:4, and then processed and dried to obtain a loose fiber web. (2) 0.8 parts of arginine-chitosan and 2 parts of histidine are added to 10 parts of polyethylene glycol (molecular weight is 200) at 50℃ and mixed evenly to obtain mixture A. The mixture is kept warm for later use. 0.03 parts of zinc acetate are added to 5 parts of polyethylene glycol (molecular weight is 200) at 50℃ and mixed evenly. The mixture is immersed in the loose fiber web and sonicated for 10 minutes. Mixture A is added and sonicated for another 15 minutes. The mixture is then removed, washed and dried to obtain loose fiber web A.

[0030] Step 2: (1) Add 5 parts of lignin-based gelatin, 12 parts of glycerin, 1 part of sodium glycerophosphate, and 2 parts of polyethylene glycol A (polyethylene glycol A has a molecular weight of 4000) to 90 parts of deionized water at 55°C and mix evenly to obtain a moisturizing adhesive solution.

[0031] (2) Set the hydroentanglement pressure to 18 bar and the diameter of the water needle outlet to 0.08 mm; reinforce the loose fiber web A with hydroentanglement to obtain the mask base fabric; coat the surface of the mask base fabric with moisturizing adhesive liquid and dry it at 45°C to constant weight to obtain the high moisturizing mask base fabric.

[0032] Example 2, a preparation process for a high-moisturizing facial mask base fabric, includes the following steps:

[0033] Pre-preparation: The preparation method of arginine-chitosan is as follows: 6 parts of chitosan are added to 80 parts of acetic acid solution (acetic acid concentration is 1 wt%) and mixed evenly to obtain chitosan solution; 2 parts of arginine are added to MES buffer (30 parts of MES buffer) at pH 5.5, then 4 parts of EDC and 2.7 parts of NHS are added, and the mixture is stirred for 3 hours. The chitosan solution is then added, and the mixture is stirred at 20℃ until dark brown. The mixture is then dialyzed (using a 3.5 kDa dialysis bag) and freeze-dried to obtain arginine-chitosan.

[0034] The preparation method of lignin-based gelatin is as follows: (1) Add 2 parts of glutamic acid and 1.2 parts of glutaraldehyde to 30 parts of deionized water to obtain mixture A and mixture B, and set aside; add 2 parts of enzymatic hydrolyzed lignin to 75 parts of sodium hydroxide aqueous solution (sodium hydroxide concentration is 1.5wt%), stir at 90℃ for 30 minutes, add mixture A and mixture B dropwise, and finish within 40 minutes, reflux for 3 hours, add dilute hydrochloric acid solution, let stand for 4 hours to precipitate solid, wash the solid repeatedly with deionized water, filter and dry to obtain glutamic acid grafted enzymatic hydrolyzed lignin; (2) Add 2 parts of EDC·HCl and 1.2 parts of NHS to 50 parts of DMSO and mix evenly, add 10 parts of glutamic acid grafted enzymatic hydrolyzed lignin at 38℃ and mix evenly, stir in the dark for 5 hours, add 5 parts of aminated gelatin, continue stirring for 18 hours, dialyze in deionized water at 38℃ (dialysis bag of 3.5kDa), freeze dry to obtain lignin-based gelatin;

[0035] Step 1: (1) Wood fiber, cotton pulp and bamboo fiber are added to deionized water and mixed evenly. They are mechanically loosened and then pulped to obtain wood pulp (wood fiber content is 50wt%), cotton pulp (cotton pulp content is 30wt%) and bamboo pulp (bamboo fiber content is 25wt%). The wood pulp, cotton pulp and bamboo pulp are mixed evenly in a mass ratio of 10:7:4, and then processed and dried to obtain a loose fiber web. (2) 1 part arginine-chitosan and 2 parts histidine are added to 10 parts polyethylene glycol (molecular weight is 200) at 50℃ and mixed evenly to obtain mixture A. The mixture is kept warm for later use. 0.05 parts zinc acetate are added to 5 parts polyethylene glycol (molecular weight is 200) at 50℃ and mixed evenly. The loose fiber web is immersed and sonicated for 10 minutes. Mixture A is added and sonicated for another 15 minutes. The web is then removed, washed, and dried to obtain loose fiber web A.

[0036] Step 2: (1) 6 parts of lignin-based gelatin, 15 parts of glycerin, 1 part of sodium glycerophosphate, and 2 parts of polyethylene glycol A (polyethylene glycol A has a molecular weight of 4000) are added to 90 parts of deionized water at 55°C and mixed evenly to obtain a moisturizing adhesive solution.

[0037] (2) Set the hydroentanglement pressure to 18 bar and the diameter of the water needle outlet to 0.08 mm; reinforce the loose fiber web A with hydroentanglement to obtain the mask base fabric; coat the surface of the mask base fabric with moisturizing adhesive liquid and dry it at 45°C to constant weight to obtain the high moisturizing mask base fabric.

[0038] Example 3: A preparation process for a high-moisturizing facial mask base fabric, comprising the following steps:

[0039] Pre-preparation: The preparation method of arginine-chitosan is as follows: 6 parts of chitosan are added to 80 parts of acetic acid solution (acetic acid concentration is 1 wt%) and mixed evenly to obtain chitosan solution; 2 parts of arginine are added to MES buffer (30 parts of MES buffer) at pH 5.5, then 4 parts of EDC and 2.7 parts of NHS are added, and the mixture is stirred for 3 hours. The chitosan solution is then added, and the mixture is stirred at 20℃ until dark brown. The mixture is then dialyzed (using a 3.5 kDa dialysis bag) and freeze-dried to obtain arginine-chitosan.

[0040] The preparation method of lignin-based gelatin is as follows: (1) Add 2 parts of glutamic acid and 1.2 parts of glutaraldehyde to 30 parts of deionized water to obtain mixture A and mixture B, which are set aside; add 2 parts of enzymatically hydrolyzed lignin to 75 parts of sodium hydroxide aqueous solution (the concentration of sodium hydroxide is 1.5 wt%), stir at 90°C for 30 minutes, add mixture A and mixture B dropwise, and finish adding within 40 minutes. Reflux for 3 hours, add dilute hydrochloric acid solution, let stand for 4 hours to precipitate solid, and use deionized water to precipitate the solid. (1) Wash the solid repeatedly with water, filter and dry to obtain glutamic acid grafted enzymatic hydrolysed lignin; (2) Add 2 parts EDC·HCl and 1.2 parts NHS to 50 parts DMSO and mix evenly. Add 10 parts glutamic acid grafted enzymatic hydrolysed lignin at 38°C and mix evenly. Stir for 4-5 hours in the dark. Add 5 parts aminoated gelatin and continue stirring for 18 hours. Dialyze in deionized water at 38°C (3.5kDa dialysis bag) and freeze dry to obtain lignin-based gelatin.

[0041] Step 1: (1) Wood fiber, cotton pulp and bamboo fiber are added to deionized water and mixed evenly. They are mechanically loosened and then pulped to obtain wood pulp (wood fiber content is 50wt%), cotton pulp (cotton pulp content is 30wt%) and bamboo pulp (bamboo fiber content is 25wt%). The wood pulp, cotton pulp and bamboo pulp are mixed evenly in a mass ratio of 10:7:4, and then processed and dried to obtain a loose fiber web. (2) 1.7 parts of arginine-chitosan and 2 parts of histidine are added to 10 parts of polyethylene glycol (molecular weight is 200) at 50℃ and mixed evenly to obtain mixture A. The mixture is kept warm for later use. 0.05 parts of zinc acetate are added to 5 parts of polyethylene glycol (molecular weight is 200) at 50℃ and mixed evenly. The loose fiber web is immersed and sonicated for 10 minutes. Mixture A is added and sonicated for another 15 minutes. The web is then removed, washed, and dried to obtain loose fiber web A.

[0042] Step 2: (1) Add 5 parts of lignin-based gelatin, 17 parts of glycerin, 1.5 parts of sodium glycerophosphate, and 3 parts of polyethylene glycol A (polyethylene glycol A has a molecular weight of 4000) to 90 parts of deionized water at 55°C and mix evenly to obtain a moisturizing adhesive solution.

[0043] (2) Set the hydroentanglement pressure to 18 bar and the diameter of the water needle outlet to 0.08 mm; reinforce the loose fiber web A with hydroentanglement to obtain the mask base fabric; coat the surface of the mask base fabric with moisturizing adhesive liquid and dry it at 45°C to constant weight to obtain the high moisturizing mask base fabric.

[0044] Comparative Example 1 is based on Example 3, but without the introduction of arginine-chitosan;

[0045] Step 1: (1) Wood fiber, cotton pulp and bamboo fiber are added to deionized water and mixed evenly. They are mechanically loosened and then pulped to obtain wood pulp (wood fiber content is 50wt%), cotton pulp (cotton pulp content is 30wt%) and bamboo pulp (bamboo fiber content is 25wt%). The wood pulp, cotton pulp and bamboo pulp are mixed evenly in a mass ratio of 10:7:4, and then processed and dried to obtain a loose fiber web. (2) 2 parts of histidine are added to 10 parts of polyethylene glycol (molecular weight is 200) at 50℃ and mixed evenly to obtain mixture A. The mixture is kept warm for later use. 0.05 parts of zinc acetate are added to 5 parts of polyethylene glycol (molecular weight is 200) at 50℃ and mixed evenly. The loose fiber web is immersed in the mixture and sonicated for 10 minutes. Mixture A is added and sonicated for another 15 minutes. The mixture is then removed, washed and dried to obtain loose fiber web A.

[0046] Step 2: (1) Add 5 parts of lignin-based gelatin, 17 parts of glycerin, 1.5 parts of sodium glycerophosphate, and 3 parts of polyethylene glycol A (polyethylene glycol A has a molecular weight of 4000) to 90 parts of deionized water at 55°C and mix evenly to obtain a moisturizing adhesive solution.

[0047] (2) Set the hydroentanglement pressure to 18 bar and the diameter of the water needle outlet to 0.08 mm; reinforce the loose fiber web A with hydroentanglement to obtain the mask base fabric; coat the surface of the mask base fabric with moisturizing adhesive liquid and dry it at 45°C to constant weight to obtain the high moisturizing mask base fabric.

[0048] Comparative Example 2 is based on Example 3, except that polyethylene glycol 200 is replaced with deionized water; the other operating steps remain the same.

[0049] Step 1: (1) Wood fiber, cotton pulp and bamboo fiber are added to deionized water and mixed evenly. They are mechanically loosened and then pulped to obtain wood pulp (wood fiber content is 50wt%), cotton pulp (cotton pulp content is 30wt%) and bamboo pulp (bamboo fiber content is 25wt%). The wood pulp, cotton pulp and bamboo pulp are mixed evenly in a mass ratio of 10:7:4, and then processed and dried to obtain a loose fiber web. (2) 1.7 parts of arginine-chitosan and 2 parts of histidine are added to 10 parts of polyethylene glycol (molecular weight is 200) at 50℃ and mixed evenly to obtain mixture A. The mixture is kept warm for later use. 0.05 parts of zinc acetate are added to 5 parts of polyethylene glycol (molecular weight is 200) at 50℃ and mixed evenly. The loose fiber web is immersed and sonicated for 10 minutes. Mixture A is added and sonicated for another 15 minutes. The web is then removed, washed, and dried to obtain loose fiber web A.

[0050] Step 2: (1) Add 5 parts of lignin-based gelatin, 17 parts of glycerin, 1.5 parts of sodium glycerophosphate, and 3 parts of polyethylene glycol A (polyethylene glycol A has a molecular weight of 4000) to 90 parts of deionized water at 55°C and mix evenly to obtain a moisturizing adhesive solution.

[0051] (2) Set the hydroentanglement pressure to 18 bar and the diameter of the water needle outlet to 0.08 mm; reinforce the loose fiber web A with hydroentanglement to obtain the mask base fabric; coat the surface of the mask base fabric with moisturizing adhesive liquid and dry it at 45°C to constant weight to obtain the high moisturizing mask base fabric.

[0052] Comparative Example 3 is based on Example 3, but the gelatin was not modified; the remaining operating steps remained the same.

[0053] Step 1: (1) Wood fiber, cotton pulp and bamboo fiber are added to deionized water and mixed evenly. They are mechanically loosened and then pulped to obtain wood pulp (wood fiber content is 50wt%), cotton pulp (cotton pulp content is 30wt%) and bamboo pulp (bamboo fiber content is 25wt%). The wood pulp, cotton pulp and bamboo pulp are mixed evenly in a mass ratio of 10:7:4, and then processed and dried to obtain a loose fiber web. (2) 1.7 parts of arginine-chitosan and 2 parts of histidine are added to 10 parts of polyethylene glycol (molecular weight is 200) at 50℃ and mixed evenly to obtain mixture A. The mixture is kept warm for later use. 0.05 parts of zinc acetate are added to 5 parts of polyethylene glycol (molecular weight is 200) at 50℃ and mixed evenly. The mixture is immersed in the loose fiber web and sonicated for 10 minutes. Mixture A is added and sonicated for another 15 minutes. The mixture is then removed, washed and dried to obtain loose fiber web A.

[0054] Step 2: (1) Add 5 parts gelatin, 17 parts glycerin, 1.5 parts sodium glycerophosphate, and 3 parts polyethylene glycol A (polyethylene glycol A has a molecular weight of 4000) to 90 parts deionized water at 55°C and mix evenly to obtain a moisturizing adhesive solution.

[0055] (2) Set the hydroentanglement pressure to 18 bar and the diameter of the water needle outlet to 0.08 mm; reinforce the loose fiber web A with hydroentanglement to obtain the mask base fabric; coat the surface of the mask base fabric with moisturizing adhesive liquid and dry it at 45°C to constant weight to obtain the high moisturizing mask base fabric.

[0056] Comparative Example 4 is based on Example 3, with arginine-chitosan added to the moisturizing adhesive solution; the remaining operation steps remain unchanged;

[0057] Pre-preparation: The preparation method of arginine-chitosan is as follows: 6 parts of chitosan are added to 80 parts of acetic acid solution (acetic acid concentration is 1 wt%) and mixed evenly to obtain chitosan solution; 2 parts of arginine are added to MES buffer (30 parts of MES buffer) at pH 5.5, then 4 parts of EDC and 2.7 parts of NHS are added, and the mixture is stirred for 3 hours. The chitosan solution is then added, and the mixture is stirred at 20℃ until dark brown. The mixture is then dialyzed (using a 3.5 kDa dialysis bag) and freeze-dried to obtain arginine-chitosan.

[0058] Step 1: (1) Wood fiber, cotton pulp and bamboo fiber are added to deionized water and mixed evenly. They are mechanically loosened and then pulped separately to obtain wood pulp (wood fiber content is 50wt%), cotton pulp (cotton pulp content is 30wt%) and bamboo pulp (bamboo fiber content is 25wt%). The wood pulp, cotton pulp and bamboo pulp are mixed evenly in a mass ratio of 10:7:4, and then processed and dried to obtain a loose fiber web.

[0059] Step 2: (1) Add 5 parts of lignin-based gelatin, 17 parts of glycerol, 1.5 parts of sodium glycerophosphate, 1.7 parts of arginine-chitosan, and 3 parts of polyethylene glycol A (polyethylene glycol A has a molecular weight of 4000) to 90 parts of deionized water at 55°C and mix evenly to obtain a moisturizing adhesive solution.

[0060] (2) Set the hydroentanglement pressure to 18 bar and the diameter of the water needle outlet to 0.08 mm; reinforce the loose fiber web A with hydroentanglement to obtain the mask base fabric; coat the surface of the mask base fabric with moisturizing adhesive liquid and dry it at 45°C to constant weight to obtain the high moisturizing mask base fabric.

[0061] Test experiment: (1) Water retention: Weigh the mask base fabric samples prepared in Examples 1-3 and Comparative Examples 1-4 and record them as M0; immerse them in water until saturated and weigh them as M1; place them in an environment with a temperature of 50℃ and a wind speed of 0.5m / s for 6 hours, weigh them, and record the sample weight as M2. The formula for calculating the water retention rate is: water retention rate = 1-(M1-M2) / (M1-M0); (2) Detect the antibacterial rate (%) against Staphylococcus aureus according to GB / T20944-2008 standard;

[0062] Table 1

[0063] Water retention rate (%) Bacteriostatic rate (%) Example 1 72.3 96.4 Example 2 75.8 98.2 Example 3 77.5 99.8 Comparative Example 1 63.3 84.6 Comparative Example 2 73.6 90.3 Comparative Example 3 66.5 95.2 Comparative Example 4 69.2 86.5

[0064] Conclusions: Comparative Example 1, based on Example 3, did not introduce arginine-chitosan, resulting in decreased water retention and antibacterial properties. Comparative Example 2, based on Example 3, replaced polyethylene glycol 200 with deionized water, causing zinc ions to coordinate with arginine-chitosan and histidine, leading to decreased adhesion and reduced interfacial properties with the moisturizing adhesive during hydroentangling reinforcement of the fiber web, thus reducing the performance of Comparative Example 2. Comparative Example 3, based on Example 3, did not modify gelatin; lignin possesses certain antibacterial and water-retention properties, thus reducing the performance of Comparative Example 3. Comparative Example 4, based on Example 3, added arginine-chitosan to the moisturizing adhesive; however, no MOF structure was formed, resulting in decreased performance of Comparative Example 4.

[0065] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

Claims

1. A preparation process for a high-moisturizing facial mask base fabric, characterized in that: The following steps are included: Step 1: (1) Wood fiber, cotton pulp and bamboo fiber are added to deionized water and mixed evenly. They are mechanically loosened and then pulped separately to obtain wood pulp, cotton pulp and bamboo pulp. The wood pulp, cotton pulp and bamboo pulp are mixed evenly in a certain proportion, and then processed and dried to obtain loose fiber web. (2) Arginine-chitosan and histidine are added to polyethylene glycol at 50~55℃ and mixed evenly to obtain mixture A. The mixture is kept warm for later use. Zinc acetate is added to polyethylene glycol at 50~55℃ and mixed evenly. The loose fiber web is immersed in the mixture and sonicated for 5~10 minutes. Mixture A is added and sonicated for another 10~20 minutes. The mixture is then removed, washed and dried to obtain loose fiber web A. Step 2: (1) Add lignin-based gelatin, glycerin, sodium glycerophosphate and polyethylene glycol A to deionized water at 50~60℃ and mix evenly to obtain a moisturizing adhesive solution; (2) Set the hydroentanglement pressure to 18~20 bar and the diameter of the water needle outlet to 0.08~0.1 mm; reinforce the loose fiber web A with hydroentanglement to obtain the mask base fabric; coat the surface of the mask base fabric with a moisturizing adhesive liquid and dry it at 40~50℃ to constant weight to obtain a high moisturizing mask base fabric. The raw materials of the loose fiber web A include the following components: by mass parts, 0.8-1.7 parts arginine-chitosan, 0.03-0.05 parts zinc acetate, 2-3 parts histidine, and 10-15 parts polyethylene glycol; the molecular weight of the polyethylene glycol is 200-400. The raw materials of the moisturizing adhesive liquid include the following components: by mass parts, 5-7 parts lignin-based gelatin, 12-17 parts glycerol, 1-2 parts sodium glycerophosphate, 2-3 parts polyethylene glycol A, and 70-90 parts deionized water; the molecular weight of the polyethylene glycol A is 2000-4000.

2. The preparation process of a high-moisturizing facial mask base fabric according to claim 1, characterized in that: The wood pulp contains 40-50 wt% wood fiber; the cotton pulp contains 30-40 wt% cotton pulp meal; the bamboo pulp contains 20-30 wt% bamboo fiber; and the mass ratio of the wood pulp, cotton pulp, and bamboo pulp is (7-11):(5-9):(2-4).

3. The preparation process of a high-moisturizing facial mask base fabric according to claim 1, characterized in that: The preparation method of arginine-chitosan is as follows: chitosan is added to acetic acid solution and mixed evenly to obtain chitosan solution; arginine is added to MES buffer solution with pH 5~5.5, then EDC and NHS are added, and the mixture is stirred for 2~3 hours. The chitosan solution is added, and the mixture is stirred at 20~35℃ until dark brown. The mixture is then dialyzed and freeze-dried to obtain arginine-chitosan.

4. The preparation process of a high-moisturizing facial mask base fabric according to claim 3, characterized in that: The arginine-chitosan raw material comprises the following components by mass: 4-6 parts chitosan, 1-2 parts arginine, 3.5-5 parts EDC, 2.7-3 parts NHS, 30-40 parts MES buffer, and 80-90 parts acetic acid solution; the concentration of the acetic acid solution is 1-2 wt%.

5. The preparation process of a high-moisturizing facial mask base fabric according to claim 1, characterized in that: The preparation method of the lignin-based gelatin is as follows: (1) Glutamic acid and glutaraldehyde are added to deionized water to obtain mixture A and mixture B, and kept warm for later use; Add the enzymatically hydrolyzed lignin to the sodium hydroxide aqueous solution, stir at 90~95℃ for 20~30 minutes, add the mixture A and the mixture B dropwise, and finish the addition within 35~40 minutes. Reflux for 3~3.5 hours, add the dilute hydrochloric acid solution, let stand for 4~5 hours to precipitate the solid, wash the solid repeatedly with deionized water, filter and dry to obtain glutamic acid grafted enzymatically hydrolyzed lignin; (2) Add EDC·HCl and NHS to DMSO and mix evenly, add the glutamic acid grafted enzymatically hydrolyzed lignin at 37~42℃ and mix evenly, stir in the dark for 4~5 hours, add the aminoated gelatin, continue stirring for 18~20 hours, dialyze in deionized water at 37~42℃, freeze dry to obtain lignin-based gelatin.

6. The preparation process of a high-moisturizing mask base fabric according to claim 5, characterized in that: The raw material for the glutamic acid grafted enzymatic hydrolysis of lignin comprises the following components: by mass, 1-2 parts enzymatic hydrolysis of lignin, 1-2 parts glutamic acid, 0.8-1.5 parts glutaraldehyde, 30-40 parts deionized water, and 70-80 parts sodium hydroxide aqueous solution; the concentration of sodium hydroxide in the sodium hydroxide aqueous solution is 1-2 wt%.

7. The preparation process of a high-moisturizing facial mask base fabric according to claim 6, characterized in that: The raw materials for the lignin-based gelatin include the following components by mass: 5 parts aminated gelatin, 8-15 parts glutamic acid grafted enzymatic hydrolyzed lignin, 1-3 parts EDC·HCl, 0.5-1.5 parts NHS, and 50-60 parts DMSO.

8. A high-moisturizing mask base fabric is prepared according to any one of claims 1 to 7.