Antibacterial nonwoven fabric containing tea polyphenols and preparation method thereof

Abstract

The invention discloses an antibacterial non-woven fabric containing tea polyphenols, which is made of functionalized polylactic acid fibers containing tea polyphenols and absorbent cotton fibers as raw materials, wherein the functionalized polylactic acid fibers containing tea polyphenols account for 15-25% of the total weight of the raw materials, and the absorbent cotton fibers account for 75-85% of the total weight of the raw materials. The invention also discloses a method for preparing the antibacterial non-woven fabric containing tea polyphenols. The non-woven fabric prepared by the invention has excellent and lasting antibacterial and antioxidant effects, and is soft to the touch, highly comfortable, and has good mechanical properties, and is particularly suitable for making sanitary products with high comfort requirements such as face towels and towels.

Description

Technical Field

[0001] The invention relates to the technical field of functional non-woven fabric materials, and in particular to an antibacterial non-woven fabric containing tea polyphenols and a preparation method thereof. Background Art

[0002] A face towel is a cleaning product used to wipe the skin of the face or other parts to achieve the effect of decontamination and cleaning. In addition to being used for basic cleaning, face towels can also be used to remove makeup, clean facial masks, etc., and are widely used in daily life. Traditional face towels are mostly made of pure cotton or non-woven fabrics. Among them, pure cotton face towels are soft and fit the skin, but the performance is relatively simple. In recent years, with the improvement of people's living standards, higher requirements have been put forward for the quality of face towels, and materials for face towels with functions such as antibacterial, antioxidant, beauty, and moisturizing have emerged in an endless stream. Under this trend, compounding pure cotton with functionalized fibers to obtain functionalized non-woven fabric materials has become a hot spot for development. Polylactic acid fibers are not only degradable, but also have certain hygroscopicity, wrinkle resistance and resilience, so they are more comfortable. Compounding polylactic acid fibers loaded with antibacterial and antioxidant substances, such as tea polyphenols, with cotton fibers can obtain non-woven fabric materials with certain antibacterial and antioxidant effects, good quality and high comfort. However, on the one hand, in order to maintain excellent comfort of non-woven materials, the dosage of functionalized polylactic acid fiber should not be too high, and the content of tea polyphenols that it can carry is also limited, and the antibacterial effect is not good; on the other hand, how to prolong the durability of the antibacterial effect of non-woven materials is also a very important issue. Summary of the invention

[0003] Based on the technical problems existing in the background technology, the present invention proposes an antibacterial non-woven fabric containing tea polyphenols and a preparation method thereof.

[0004] The antibacterial non-woven fabric containing tea polyphenols is prepared from functionalized polylactic acid fibers containing tea polyphenols and absorbent cotton fibers as raw materials, wherein the functionalized polylactic acid fibers containing tea polyphenols account for 15-25% of the total weight of the raw materials, and the absorbent cotton fibers account for 75-85% of the total weight of the raw materials;

[0005] The preparation method of the functionalized polylactic acid fiber containing tea polyphenols comprises:

[0006] (1) using quaternary ammonium salt grafted β-cyclodextrin to include tea polyphenols to obtain a tea polyphenol-quaternary ammonium salt grafted β-cyclodextrin inclusion complex;

[0007] (2) After the polylactic acid and the tea polyphenol-quaternary ammonium salt grafted β-cyclodextrin inclusion compound are mixed, they are first melt-extruded through a twin-screw extruder to obtain a polylactic acid composite masterbatch, and then melt-spun through a melt spinning machine to obtain the polylactic acid composite masterbatch.

[0008] Preferably, in step (1), the method of using quaternary ammonium salt grafted β-cyclodextrin to include tea polyphenols is as follows: adding quaternary ammonium salt grafted β-cyclodextrin into water, stirring and dissolving at 40-60°C to obtain a quaternary ammonium salt grafted β-cyclodextrin aqueous solution, dissolving tea polyphenols in anhydrous ethanol to obtain an ethanol solution of tea polyphenols, adding the ethanol solution of tea polyphenols dropwise into the quaternary ammonium salt grafted β-cyclodextrin aqueous solution, stirring at 40-60°C for 4-6h, filtering, washing and drying to obtain a tea polyphenol-quaternary ammonium salt grafted β-cyclodextrin inclusion complex.

[0009] Preferably, in step (1), the mass ratio of quaternary ammonium salt grafted β-cyclodextrin to tea polyphenols is 1:(0.3-0.5).

[0010] Preferably, the preparation method of the quaternary ammonium salt grafted β-cyclodextrin is: first, polyethyleneimine-β-cyclodextrin is added to water and dispersed evenly, then propylene oxide is added, stirred and reacted at 0-4°C for 6-12h, after filtering and washing, the obtained product is added to tert-amyl alcohol and dispersed evenly, then iodomethane is added, stirred and reacted at 50-70°C for 10-20h, filtered, washed and dried to obtain the product.

[0011] Preferably, in the preparation method of the quaternary ammonium salt grafted β-cyclodextrin, the mass ratio of polyethyleneimine-β-cyclodextrin, propylene oxide and iodomethane is 1:(2-4):(5-10).

[0012] In the present invention, polyethyleneimine-β-cyclodextrin can be prepared by conventional methods. Preferably, the preparation method of polyethyleneimine-β-cyclodextrin is as follows: dissolving β-cyclodextrin in dimethyl sulfoxide to obtain a cyclodextrin solution, dissolving N,N'-carbonyldiimidazole in dimethyl sulfoxide to obtain an N,N'-carbonyldiimidazole solution, and dissolving polyethyleneimine in dimethyl sulfoxide to obtain a polyethyleneimine solution; firstly, adding the N,N'-carbonyldiimidazole solution dropwise to the cyclodextrin solution under light-proof conditions, and then adding triethylamine and stirring the mixture at room temperature for 2-4 hours under light-proof conditions and under nitrogen protection, and after the reaction is completed, slowly adding the polyethyleneimine solution dropwise, stirring the mixture at room temperature for 5-15 hours, and after the reaction is completed, dialyzing the reaction product for 12-24 hours, and freeze-drying the mixture to obtain polyethyleneimine-β-cyclodextrin; preferably, the mass ratio of the β-cyclodextrin, N,N'-carbonyldiimidazole, triethylamine, and polyethyleneimine is 1:(0.5-2):(1-3):(2-5).

[0013] Preferably, the molecular weight of the polyethyleneimine is 500Da-10000Da.

[0014] Preferably, in step (2), the mass ratio of polylactic acid to the tea polyphenol-quaternary ammonium salt grafted β-cyclodextrin inclusion complex is 100:(5-10).

[0015] Preferably, in step (2), the temperature of melt extrusion is 140-210°C.

[0016] Preferably, in step (2), the temperature of melt spinning is 160-230°C.

[0017] Preferably, the nonwoven fabric has a gram weight of 50-100 g / m 2 .

[0018] A method for preparing the antibacterial non-woven fabric containing tea polyphenols comprises the following steps:

[0019] The functionalized polylactic acid fibers containing tea polyphenols and absorbent cotton fibers are mixed and combed to form a fiber web, which is then reinforced by hydroentanglement to obtain the fiber web.

[0020] The beneficial effects of the present invention are as follows:

[0021] The present invention adopts functionalized polylactic acid fiber containing tea polyphenols and absorbent cotton fiber as raw materials, and prepares non-woven fabrics by carding into a web and water-entangled reinforcement. By adjusting the proportion of polylactic acid fiber and absorbent cotton fiber, the non-woven fabric has high comfort, soft hand feeling and good mechanical properties; the polyethyleneimine-β-cyclodextrin obtained by grafting β-cyclodextrin with polyethyleneimine is reacted with tertiary amination reagent propylene oxide and quaternization reagent methyl iodide to carry out quaternary ammonium salt grafting, thereby obtaining the quaternary ammonium salt grafted β-cyclodextrin and tea polyphenol form a tea polyphenol-quaternary ammonium salt grafted β-cyclodextrin inclusion compound, which is then mixed with polylactic acid and melt-spun to prepare a functionalized polylactic acid fiber containing tea polyphenols instead of ordinary polylactic acid fibers. The quaternary ammonium salt cyclodextrin and tea polyphenols have an antibacterial synergistic effect, which can significantly improve the antibacterial performance of the non-woven fabric. Since the tea polyphenols are coated in the cavity of the quaternary ammonium salt grafted β-cyclodextrin, the antibacterial and antioxidant effects can be effectively extended, thereby improving the durability of the antibacterial and antioxidant effects. The non-woven fabric prepared by the present invention has excellent and lasting antibacterial and antioxidant effects, and is soft to the touch, has high comfort, and has good mechanical properties. It is particularly suitable for making sanitary products with high comfort requirements such as face towels and towels. DETAILED DESCRIPTION

[0022] The technical solution of the present invention is described in detail below through specific embodiments.

[0023] Example 1

[0024] An antibacterial non-woven fabric containing tea polyphenols is made of functionalized polylactic acid fibers containing tea polyphenols and absorbent cotton fibers as raw materials, wherein the functionalized polylactic acid fibers containing tea polyphenols account for 20% of the total weight of the raw materials, and the absorbent cotton fibers account for 80% of the total weight of the raw materials;

[0025] The preparation method of functionalized polylactic acid fiber containing tea polyphenols comprises:

[0026] (1) adding quaternary ammonium salt grafted β-cyclodextrin into water, stirring and dissolving at 50° C. to obtain a quaternary ammonium salt grafted β-cyclodextrin aqueous solution, dissolving tea polyphenols in anhydrous ethanol to obtain an ethanol solution of tea polyphenols, dropping the ethanol solution of tea polyphenols into the quaternary ammonium salt grafted β-cyclodextrin aqueous solution, stirring at 50° C. for 5 hours, filtering, washing, and drying to obtain a tea polyphenol-quaternary ammonium salt grafted β-cyclodextrin inclusion complex, wherein the mass ratio of quaternary ammonium salt grafted β-cyclodextrin to tea polyphenols is 1:0.4;

[0027] (2) After polylactic acid and the tea polyphenol-quaternary ammonium salt grafted β-cyclodextrin inclusion complex are mixed in a mass ratio of 100:8, they are first melt-extruded at 140-210° C. through a twin-screw extruder to obtain a polylactic acid composite masterbatch, and then melt-spun at 160-230° C. through a melt spinning machine to obtain a polylactic acid composite masterbatch.

[0028] The preparation method of quaternary ammonium salt grafted β-cyclodextrin is as follows: first, polyethyleneimine-β-cyclodextrin is added into water and dispersed evenly, then propylene oxide is added, stirred and reacted at 3°C ​​for 8 hours, filtered and washed, and the obtained product is added into tert-amyl alcohol and dispersed evenly, then iodomethane is added, stirred and reacted at 60°C for 12 hours, filtered, washed and dried to obtain the product, wherein the mass ratio of polyethyleneimine-β-cyclodextrin, propylene oxide and iodomethane is 1:3:6.

[0029] The preparation method of polyethyleneimine-β-cyclodextrin is as follows: dissolving β-cyclodextrin in dimethyl sulfoxide to obtain a cyclodextrin solution, dissolving N,N'-carbonyldiimidazole in dimethyl sulfoxide to obtain an N,N'-carbonyldiimidazole solution, and dissolving polyethyleneimine with a molecular weight of 2000Da in dimethyl sulfoxide to obtain a polyethyleneimine solution; firstly, dropping the N,N'-carbonyldiimidazole solution into the cyclodextrin solution under light-proof conditions, then adding triethylamine, stirring and reacting at room temperature for 3 hours under light-proof conditions and under nitrogen protection, slowly dropping the polyethyleneimine solution after the reaction is completed, stirring and reacting at room temperature for 8 hours, dialyzing the reaction product for 18 hours after the reaction is completed, and freeze-drying to obtain polyethyleneimine-β-cyclodextrin, wherein the mass ratio of β-cyclodextrin, N,N'-carbonyldiimidazole, triethylamine and polyethyleneimine is 1:1:2:4.

[0030] The method for preparing the antibacterial non-woven fabric containing tea polyphenols comprises the following steps:

[0031] The functionalized polylactic acid fibers containing tea polyphenols and absorbent cotton fibers are mixed and combed to form a fiber web, which is then reinforced by hydroentanglement to obtain the fiber web.

[0032] Example 2

[0033] An antibacterial non-woven fabric containing tea polyphenols, which is made of functionalized polylactic acid fibers containing tea polyphenols and absorbent cotton fibers as raw materials, wherein the functionalized polylactic acid fibers containing tea polyphenols account for 15% of the total weight of the raw materials, and the absorbent cotton fibers account for 85% of the total weight of the raw materials;

[0034] The preparation method of functionalized polylactic acid fiber containing tea polyphenols comprises:

[0035] (1) adding quaternary ammonium salt grafted β-cyclodextrin into water, stirring and dissolving at 40° C. to obtain a quaternary ammonium salt grafted β-cyclodextrin aqueous solution, dissolving tea polyphenols in anhydrous ethanol to obtain an ethanol solution of tea polyphenols, dropping the ethanol solution of tea polyphenols into the quaternary ammonium salt grafted β-cyclodextrin aqueous solution, stirring at 40° C. for 4 hours, filtering, washing, and drying to obtain a tea polyphenol-quaternary ammonium salt grafted β-cyclodextrin inclusion complex, wherein the mass ratio of quaternary ammonium salt grafted β-cyclodextrin to tea polyphenols is 1:0.3;

[0036] (2) After polylactic acid and the tea polyphenol-quaternary ammonium salt grafted β-cyclodextrin inclusion complex are mixed in a mass ratio of 100:5, they are first melt-extruded at 140-210° C. through a twin-screw extruder to obtain a polylactic acid composite masterbatch, and then melt-spun at 160-230° C. through a melt spinning machine to obtain a polylactic acid composite masterbatch.

[0037] The preparation method of quaternary ammonium salt grafted β-cyclodextrin is as follows: first, polyethyleneimine-β-cyclodextrin is added into water and dispersed evenly, then propylene oxide is added, stirred and reacted at 0°C for 12 hours, filtered and washed, and the obtained product is added into tert-amyl alcohol and dispersed evenly, then iodomethane is added, stirred and reacted at 50°C for 20 hours, filtered, washed and dried to obtain the product, wherein the mass ratio of polyethyleneimine-β-cyclodextrin, propylene oxide and iodomethane is 1:2:5.

[0038] The preparation method of polyethyleneimine-β-cyclodextrin is as follows: dissolving β-cyclodextrin in dimethyl sulfoxide to obtain a cyclodextrin solution, dissolving N,N'-carbonyldiimidazole in dimethyl sulfoxide to obtain an N,N'-carbonyldiimidazole solution, and dissolving polyethyleneimine with a molecular weight of 600Da in dimethyl sulfoxide to obtain a polyethyleneimine solution; firstly, dropping the N,N'-carbonyldiimidazole solution into the cyclodextrin solution under light-proof conditions, then adding triethylamine, stirring and reacting at room temperature for 2 hours under light-proof conditions and nitrogen protection, slowly dropping the polyethyleneimine solution after the reaction is completed, stirring and reacting at room temperature for 5 hours, dialyzing the reaction product for 12 hours after the reaction is completed, and freeze-drying to obtain polyethyleneimine-β-cyclodextrin, wherein the mass ratio of β-cyclodextrin, N,N'-carbonyldiimidazole, triethylamine and polyethyleneimine is 1:0.5:1:2.

[0039] The method for preparing the antibacterial non-woven fabric containing tea polyphenols comprises the following steps:

[0040] The functionalized polylactic acid fibers containing tea polyphenols and absorbent cotton fibers are mixed and combed to form a fiber web, which is then reinforced by hydroentanglement to obtain the fiber web.

[0041] Example 3

[0042] An antibacterial non-woven fabric containing tea polyphenols is made of functionalized polylactic acid fibers containing tea polyphenols and absorbent cotton fibers as raw materials, wherein the functionalized polylactic acid fibers containing tea polyphenols account for 25% of the total weight of the raw materials, and the absorbent cotton fibers account for 75% of the total weight of the raw materials;

[0043] The preparation method of functionalized polylactic acid fiber containing tea polyphenols comprises:

[0044] (1) adding quaternary ammonium salt grafted β-cyclodextrin into water, stirring and dissolving at 60° C. to obtain a quaternary ammonium salt grafted β-cyclodextrin aqueous solution, dissolving tea polyphenols in anhydrous ethanol to obtain an ethanol solution of tea polyphenols, dropping the ethanol solution of tea polyphenols into the quaternary ammonium salt grafted β-cyclodextrin aqueous solution, stirring at 60° C. for 4 hours, filtering, washing, and drying to obtain a tea polyphenol-quaternary ammonium salt grafted β-cyclodextrin inclusion complex, wherein the mass ratio of quaternary ammonium salt grafted β-cyclodextrin to tea polyphenols is 1:0.5;

[0045] (2) After polylactic acid and the tea polyphenol-quaternary ammonium salt grafted β-cyclodextrin inclusion compound are mixed in a mass ratio of 100:10, they are first melt-extruded at 140-210° C. through a twin-screw extruder to obtain a polylactic acid composite masterbatch, and then melt-spun at 160-230° C. through a melt spinning machine to obtain a polylactic acid composite masterbatch.

[0046] The preparation method of quaternary ammonium salt grafted β-cyclodextrin is as follows: first, polyethyleneimine-β-cyclodextrin is added into water and dispersed evenly, then propylene oxide is added, stirred and reacted at 4°C for 6 hours, filtered and washed, and the obtained product is added into tert-amyl alcohol and dispersed evenly, then iodomethane is added, stirred and reacted at 70°C for 10 hours, filtered, washed and dried to obtain the product, wherein the mass ratio of polyethyleneimine-β-cyclodextrin, propylene oxide and iodomethane is 1:4:10.

[0047] The preparation method of polyethyleneimine-β-cyclodextrin is as follows: dissolving β-cyclodextrin in dimethyl sulfoxide to obtain a cyclodextrin solution, dissolving N,N'-carbonyldiimidazole in dimethyl sulfoxide to obtain an N,N'-carbonyldiimidazole solution, and dissolving polyethyleneimine with a molecular weight of 10000Da in dimethyl sulfoxide to obtain a polyethyleneimine solution; firstly, dropping the N,N'-carbonyldiimidazole solution into the cyclodextrin solution under light-proof conditions, then adding triethylamine, stirring and reacting at room temperature for 4 hours under light-proof conditions and nitrogen protection, slowly dropping the polyethyleneimine solution after the reaction is completed, stirring and reacting at room temperature for 15 hours, dialyzing the reaction product for 24 hours after the reaction is completed, and freeze-drying to obtain polyethyleneimine-β-cyclodextrin, wherein the mass ratio of β-cyclodextrin, N,N'-carbonyldiimidazole, triethylamine and polyethyleneimine is 1:2:3:5.

[0048] The method for preparing the antibacterial non-woven fabric containing tea polyphenols comprises the following steps:

[0049] The functionalized polylactic acid fibers containing tea polyphenols and absorbent cotton fibers are mixed and combed to form a fiber web, which is then reinforced by hydroentanglement to obtain the fiber web.

[0050] Comparative Example 1

[0051] An antibacterial non-woven fabric containing tea polyphenols is made of functionalized polylactic acid fibers containing tea polyphenols and absorbent cotton fibers as raw materials, wherein the functionalized polylactic acid fibers containing tea polyphenols account for 20% of the total weight of the raw materials, and the absorbent cotton fibers account for 80% of the total weight of the raw materials;

[0052] The preparation method of functionalized polylactic acid fiber containing tea polyphenols comprises:

[0053] (1) adding β-cyclodextrin to water, stirring and dissolving at 50° C. to obtain a β-cyclodextrin aqueous solution, dissolving tea polyphenols in anhydrous ethanol to obtain an ethanol solution of tea polyphenols, dropping the ethanol solution of tea polyphenols into the β-cyclodextrin aqueous solution, stirring at 50° C. for 5 h, filtering, washing, and drying to obtain a tea polyphenol-β-cyclodextrin inclusion complex, wherein the mass ratio of β-cyclodextrin to tea polyphenols is 1:0.4;

[0054] (2) After polylactic acid and the tea polyphenol-β-cyclodextrin inclusion compound are mixed in a mass ratio of 100:8, they are first melt-extruded at 140-210° C. through a twin-screw extruder to obtain a polylactic acid composite masterbatch, and then melt-spun at 160-230° C. through a melt spinning machine to obtain a polylactic acid composite masterbatch.

[0055] The method for preparing the antibacterial non-woven fabric containing tea polyphenols comprises the following steps:

[0056] The functionalized polylactic acid fibers containing tea polyphenols and absorbent cotton fibers are mixed and combed to form a fiber web, which is then reinforced by hydroentanglement to obtain the fiber web.

[0057] Test example

[0058] The nonwoven fabrics (weight 60 g / m 2 ) was used to test the antibacterial performance, and the test method was based on GB / T 20944.3-2008. The results are shown in Table 1:

[0059] Table 1

[0060]

[0061] It can be seen from Table 1 that the nonwoven fabric of the present invention can have an excellent antibacterial effect while ensuring comfort.

[0062] The nonwoven fabrics of Examples 1-3 (weight 60 g / m 2 ) Mechanical properties were tested according to GBT24218.3-2010. The results showed that the nonwoven fabrics of Examples 1-3 had a transverse breaking strength of ≥40N / 5cm, a longitudinal breaking strength of ≥45N / 5cm, a transverse breaking elongation of ≥20%, and a longitudinal breaking elongation of ≥30%, and had excellent mechanical properties.

[0063] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An antibacterial nonwoven fabric containing tea polyphenols, characterized in that: The invention is prepared from functionalized polylactic acid fiber containing tea polyphenols and absorbent cotton fiber as raw materials, wherein the functionalized polylactic acid fiber containing tea polyphenols accounts for 15-25% of the total weight of the raw materials, and the absorbent cotton fiber accounts for 75-85% of the total weight of the raw materials; The preparation method of the functionalized polylactic acid fiber containing tea polyphenols comprises: (1) using quaternary ammonium salt grafted β-cyclodextrin to encapsulate tea polyphenols to obtain a tea polyphenol-quaternary ammonium salt grafted β-cyclodextrin inclusion complex; the mass ratio of quaternary ammonium salt grafted β-cyclodextrin to tea polyphenols is 1:(0.3-0.5); The preparation method of the quaternary ammonium salt grafted β-cyclodextrin is as follows: first, polyethyleneimine-β-cyclodextrin is added into water and dispersed evenly, then propylene oxide is added, stirred and reacted at 0-4°C for 6-12h, filtered and washed, then the obtained product is added into tert-amyl alcohol and dispersed evenly, then iodomethane is added, stirred and reacted at 50-70°C for 10-20h, filtered, washed and dried to obtain the product; the mass ratio of polyethyleneimine-β-cyclodextrin, propylene oxide and iodomethane is 1:(2-4):(5-10); (2) After mixing polylactic acid and the tea polyphenol-quaternary ammonium salt grafted β-cyclodextrin inclusion complex, firstly melt-extrude through a twin-screw extruder to obtain a polylactic acid composite masterbatch, and then melt-spin through a melt spinning machine to obtain; the mass ratio of polylactic acid to the tea polyphenol-quaternary ammonium salt grafted β-cyclodextrin inclusion complex is 100:(5-10).

2. The antibacterial nonwoven fabric containing tea polyphenols according to claim 1, characterized in that: In step (1), the method of using quaternary ammonium salt grafted β-cyclodextrin to include tea polyphenols is as follows: quaternary ammonium salt grafted β-cyclodextrin is added into water, and stirred and dissolved at 40-60° C. to obtain a quaternary ammonium salt grafted β-cyclodextrin aqueous solution, tea polyphenols are dissolved in anhydrous ethanol to obtain an ethanol solution of tea polyphenols, and the ethanol solution of tea polyphenols is added dropwise into the quaternary ammonium salt grafted β-cyclodextrin aqueous solution, and stirred at 40-60° C. for 4-6 hours, and after filtering, washing, and drying, a tea polyphenol-quaternary ammonium salt grafted β-cyclodextrin inclusion complex is obtained.

3. The antibacterial nonwoven fabric containing tea polyphenols according to claim 1, characterized in that: In step (2), the temperature of melt extrusion is 140-210°C.

4. The antibacterial nonwoven fabric containing tea polyphenols according to claim 1, characterized in that: In step (2), the temperature of melt spinning is 160-230°C.

5. The antibacterial nonwoven fabric containing tea polyphenols according to claim 1, characterized in that: The nonwoven fabric has a gram weight of 50-100 g / m 2 .

6. A method for preparing an antibacterial nonwoven fabric containing tea polyphenols according to any one of claims 1 to 5, characterized in that: The steps include: The functionalized polylactic acid fibers containing tea polyphenols and absorbent cotton fibers are mixed and combed to form a fiber web, which is then reinforced by hydroentanglement to obtain the fiber web.

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