Charged polylactic acid non-woven fabric as well as preparation method and application thereof

Abstract

The invention discloses a charged polylactic acid non-woven fabric as well as a preparation method and application thereof. The charged polylactic acid non-woven fabric provided by the invention is prepared by selecting a polylactic acid material and utilizing a water electret process technology, a stable charged electret and a surface micro electric field are formed through friction electrification of high-pressure water flow and the surface of the polylactic acid non-woven fabric, and the charged polylactic acid non-woven fabric has lasting charge storage capacity, excellent hydrophilic moisturizing performance and good mechanical performance; the hydrogel has good biocompatibility and biodegradability, is green and environment-friendly, and is simple in preparation process and low in cost. The prepared charged polylactic acid non-woven fabric is used for preparing a mask, cell growth can be effectively promoted, full absorption and utilization of a nutrient solution by skin can be promoted, and the anti-aging effect and other effects are achieved.

Description

Technical Field

[0001] The present invention belongs to the field of biotechnology, and in particular relates to a charged polylactic acid non-woven fabric and a preparation method and application thereof. Background Art

[0002] With rapid economic growth and the continuous improvement of people's quality of life in recent years, facial masks have attracted widespread attention as a quick and convenient skincare product. However, the habit of using and disposing of facial masks has resulted in significant resource waste and environmental pressure. Traditional facial masks are mostly made of synthetic polymers that are difficult to degrade, causing environmental pollution after use and making it difficult to maintain a stable charge and moisturizing properties during use. With the increasing use of biodegradable materials, their use in facial masks further demonstrates their environmental friendliness and resource recycling advantages.

[0003] Traditional facial masks primarily work by being applied to the skin's surface, allowing the active ingredients to penetrate naturally into the skin. However, the natural barrier effect of the skin's stratum corneum significantly reduces the absorption efficiency of the active ingredients, causing most of the ingredients to remain on the skin's surface and struggle to penetrate the subcutaneous tissue and be absorbed and utilized by the body. Related technologies describe a 3D-printed electret microneedle absorption-promoting facial mask, comprising a microneedle array layer on the lower surface of the mask layer, an isolation layer on the upper surface of the mask layer, and an electret layer on the upper surface of the isolation layer. The electret layer utilizes microcurrents and electrostatic fields to promote the penetration of the matrix into the skin. However, this electret layer does not absorb essence and needs to be stacked with the mask layer, resulting in a weak absorption-promoting effect. Furthermore, the preparation method requires an external power supply, is complex in structure, difficult to operate, and has a high cost. Related technologies also describe a method that focuses on studying the properties of seaweed fibers and their application in spunlace mask base fabrics. The method explores the carding process, web formation process, and fiber drop rate of seaweed fibers and hydrophilically modified polyester fibers. However, seaweed fiber and polyester fiber are prone to generate static electricity during the combing process, which affects the uniformity of the web. The preparation process is complicated and costly. In addition, the mechanical properties and durability of the mask base fabric are greatly reduced through the hydroentanglement process. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the above-mentioned prior art. To this end, the present invention provides a charged polylactic acid nonwoven fabric.

[0005] The present invention also provides a method for preparing the charged polylactic acid non-woven fabric.

[0006] The present invention also proposes the use of the charged polylactic acid non-woven fabric in preparing a facial mask base fabric or a facial mask.

[0007] The present invention also proposes the use of the charged polylactic acid non-woven fabric in the preparation of products for anti-aging, moisturizing or promoting penetration.

[0008] The invention also provides a facial mask base fabric.

[0009] The invention also provides a facial mask.

[0010] According to a first aspect of the present invention, a charged polylactic acid nonwoven fabric is provided, which is prepared by subjecting the polylactic acid nonwoven fabric to a water electret treatment. The charged polylactic acid nonwoven fabric is made from polylactic acid, a biodegradable material formed by polymerizing lactic acid monomers formed by microbial fermentation. Polylactic acid has excellent mechanical properties and is easy to process. Polylactic acid has a variety of crystal structures that can stably store charge, and its surface is rich in stable micro-electric fields, which can effectively promote cell growth and achieve anti-aging effects.

[0011] In some embodiments of the present invention, the surface electrostatic potential of the charged polylactic acid non-woven fabric is 600-750V.

[0012] In some embodiments of the present invention, the surface Zeta potential of the charged polylactic acid non-woven fabric is -18 to -33 mV.

[0013] In some embodiments of the present invention, before subjecting the polylactic acid non-woven fabric to the hydroelectret treatment, the step of soaking the polylactic acid non-woven fabric in a solvent is further included.

[0014] In some embodiments of the present invention, the solvent comprises water.

[0015] In some embodiments of the present invention, the soaking time is 3-7 minutes, for example, 3 minutes, 4 minutes, 5 minutes, 6 minutes, or 7 minutes. The purpose of the soaking treatment is to completely soak the polylactic acid nonwoven fabric.

[0016] In some embodiments of the present invention, the water electret treatment specifically includes the following steps: adding the treatment liquid used in the water electret treatment to a high-pressure water flow treatment device, and then performing an electret treatment on the polylactic acid non-woven fabric through the high-pressure water flow treatment device. The water electret technology uses a high-pressure pure water jet to frictionally charge the substrate, which can form an electret on the surface of the polylactic acid non-woven fabric material to store static charge for a long time, and generate a stable electrostatic field in the surrounding space, thereby improving the moisture retention of the polylactic acid non-woven fabric material itself. At the same time, it can provide a driving force for drug molecules to penetrate the skin, and can also regulate the skin's microstructure to ensure that the large amount of nutrient solution carried by the mask is conducive to the skin's full absorption and utilization. Secondly, the non-woven fabric material prepared by this method has a soft feel and a pleasant texture, and has broad application prospects.

[0017] In some embodiments of the present invention, the electret treatment includes maintaining the water droplets from the nozzle perpendicular to the surface of the polylactic acid non-woven fabric to perform water electret.

[0018] In some embodiments of the present invention, the water electret treatment uses a pressure of 3-6 MPa, for example, 3 MPa, 4 MPa, 5 MPa, or 6 MPa.

[0019] In some embodiments of the present invention, the treatment solution used in the water electret treatment includes one of a NaCl solution with a concentration of 0.01-0.5 mmol / L and water.

[0020] In some embodiments of the present invention, the concentration of the NaCl solution is 0.05-0.3 mmol / L.

[0021] In some embodiments of the present invention, the concentration of the NaCl solution is 0.08-0.2 mmol / L.

[0022] In some embodiments of the present invention, the concentration of the NaCl solution is 0.08-0.12 mmol / L.

[0023] In some embodiments of the present invention, the concentration of the NaCl solution is 0.1 mmol / L.

[0024] In some embodiments of the present invention, after the water electret treatment, the steps of negative pressure treatment and drying are further included.

[0025] In some embodiments of the present invention, the negative pressure treatment includes negative pressure suction.

[0026] In some embodiments of the present invention, the negative pressure treatment time is 1-5 minutes, for example, it can be 1 minute, 2 minutes, 3 minutes, 4 minutes, or 5 minutes.

[0027] In some embodiments of the present invention, the pressure used in the negative pressure treatment is 3-7 bar, for example, 3 bar, 4 bar, 5 bar, 6 bar, or 7 bar.

[0028] In some embodiments of the present invention, the drying method includes oven drying.

[0029] In some embodiments of the present invention, the drying condition is drying at 37-45° C. for 1-3 hours.

[0030] In some embodiments of the present invention, the drying condition is drying at 38-42° C. for 1.5-2.5 hours.

[0031] According to a second aspect of the present invention, a method for preparing the charged polylactic acid nonwoven fabric is provided. The method comprises the following steps: preparing the charged polylactic acid nonwoven fabric by subjecting the polylactic acid nonwoven fabric to a water electret treatment.

[0032] In some embodiments of the present invention, before subjecting the polylactic acid non-woven fabric to the hydroelectret treatment, the step of soaking the polylactic acid non-woven fabric in a solvent is further included.

[0033] In some embodiments of the present invention, the solvent comprises water.

[0034] In some embodiments of the present invention, the soaking time is 3-7 minutes, for example, 3 minutes, 4 minutes, 5 minutes, 6 minutes, or 7 minutes.

[0035] In some embodiments of the present invention, the water electret treatment specifically includes the following steps: adding the treatment liquid used for the water electret treatment into a high-pressure water flow treatment device, and then performing the electret treatment on the polylactic acid non-woven fabric through the high-pressure water flow treatment device.

[0036] In some embodiments of the present invention, the electret treatment includes maintaining the water droplets from the nozzle perpendicular to the surface of the polylactic acid non-woven fabric to perform water electret.

[0037] In some embodiments of the present invention, the water electret treatment uses a pressure of 3-6 MPa, for example, 3 MPa, 4 MPa, 5 MPa, or 6 MPa.

[0038] In some embodiments of the present invention, the treatment solution used in the water electret treatment includes one of a NaCl solution with a concentration of 0.01-0.5 mmol / L and water.

[0039] In some embodiments of the present invention, the concentration of the NaCl solution is 0.05-0.3 mmol / L.

[0040] In some embodiments of the present invention, the concentration of the NaCl solution is 0.08-0.2 mmol / L.

[0041] In some embodiments of the present invention, the concentration of the NaCl solution is 0.08-0.12 mmol / L.

[0042] In some embodiments of the present invention, the concentration of the NaCl solution is 0.1 mmol / L.

[0043] In some embodiments of the present invention, after the water electret treatment, the steps of negative pressure treatment and drying are further included.

[0044] In some embodiments of the present invention, the negative pressure treatment includes negative pressure suction.

[0045] In some embodiments of the present invention, the negative pressure treatment time is 1-5 minutes, for example, it can be 1 minute, 2 minutes, 3 minutes, 4 minutes, or 5 minutes.

[0046] In some embodiments of the present invention, the pressure used in the negative pressure treatment is 3-7 bar, for example, 3 bar, 4 bar, 5 bar, 6 bar, or 7 bar.

[0047] In some embodiments of the present invention, the drying method includes oven drying.

[0048] In some embodiments of the present invention, the drying condition is drying at 37-45° C. for 1-3 hours.

[0049] In some embodiments of the present invention, the drying condition is drying at 38-42° C. for 1.5-2.5 hours.

[0050] The method for preparing a charged polylactic acid facial mask provided by the present invention has the following beneficial effects: the preparation method of the present invention, with the advantage of selecting green, environmentally friendly and degradable materials, gives full play to the penetration-promoting effect of the water electret, and enhances the skin's absorption and utilization of the nutrient solution in the mask. The specific steps are to regulate the conductivity of the water electret solution and the pressure of the water electret operation by selecting a water electret aqueous solution (different water electret aqueous solutions have different conductivities), and adopt a negative pressure suction and drying process to obtain the best polylactic acid non-woven fabric charge storage effect, thereby preparing a polylactic acid facial mask with a long-lasting charged electret. Specifically, the advantages of setting each step are as follows:

[0051] Advantages of setting the conductivity of the water electret solution: Conductivity directly affects the efficiency of water electret polarization. Higher conductivity helps form a more uniform and stable electric field, promoting the polarization of water molecules in the polylactic acid (PLA) matrix. This polarization can improve the mechanical strength and ductility of the matrix, making it perform better in subsequent processing and use.

[0052] Advantages of setting the operating pressure of the hydro-electret: Proper adjustment of the operating pressure helps improve the liquid permeability during the hydro-electret process. At higher pressures, the hydro-electret solution can more effectively penetrate deep into the substrate, thereby achieving a more uniform polarization effect. This not only enhances the mechanical properties of the substrate, but also improves its durability in actual use.

[0053] Advantages of the negative pressure suction step: The negative pressure suction process can effectively remove excess moisture from the surface and interior of the substrate, preventing uneven moisture distribution during the subsequent drying process. By combining negative pressure suction, it can promote even moisture distribution while keeping the material moist, further enhancing the strength and ductility of the material. At the same time, while removing excess moisture from the substrate surface, a secondary friction process can be performed on the interior of the substrate.

[0054] Advantages of drying process settings: Temperature and time control during the drying process are crucial to the performance of the final product. Proper drying conditions can ensure that the internal structure of the material remains stable during the drying process after hydrostatic polarization, avoiding deformation or strength loss caused by overheating or overdrying.

[0055] The method of the present invention synergistically improves the mechanical properties and durability of the mask base fabric through each step and the setting of parameters of each step, and also improves the comfort and safety of the mask base fabric during use.

[0056] According to a third aspect of the present invention, the use of charged polylactic acid non-woven fabric in the preparation of facial mask base fabric or facial mask is proposed.

[0057] In some embodiments of the present invention, the facial mask base fabric or facial mask has degradable properties.

[0058] According to a fourth aspect of the present invention, a use of a charged polylactic acid nonwoven fabric in the preparation of products for anti-aging, moisturizing, absorption-promoting and / or penetration-promoting purposes is proposed.

[0059] In some embodiments of the present invention, the product is a skin care product, a cosmetic or a medicine.

[0060] According to a fifth aspect of the present invention, a facial mask base fabric is provided, comprising the above-mentioned charged polylactic acid non-woven fabric.

[0061] According to a sixth aspect of the present invention, a facial mask is provided, comprising the above-mentioned charged polylactic acid non-woven fabric.

[0062] According to some embodiments of the present invention, at least the following beneficial effects are achieved: the charged polylactic acid nonwoven fabric provided by the present invention is made of polylactic acid and is prepared using a water electret process. High-pressure water flows through the surface of the polylactic acid nonwoven fabric to frictionally charge it, forming a stable charged electret and a surface micro-electric field. The fabric exhibits long-lasting charge storage capacity, excellent hydrophilic and moisturizing properties, good mechanical properties, good biocompatibility and biodegradability, and is environmentally friendly, with a simple preparation process and low cost. The resulting charged polylactic acid nonwoven fabric can be used in facial masks to effectively promote cell growth and enhance the skin's absorption and utilization of nutrient solutions, achieving anti-aging effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0064] Figure 1 This is a preparation flow chart of Example 1 of the present invention. DETAILED DESCRIPTION

[0065] The following will clearly and completely describe the concept and technical effects of the present invention in conjunction with the embodiments to fully understand the purpose, features and effects of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without creative work are all within the scope of protection of the present invention.

[0066] If the specific conditions are not specified in the examples, the experiments were carried out under conventional conditions or those recommended by the manufacturer. All reagents or instruments used, if the manufacturer is not specified, are commercially available conventional products.

[0067] In the description of the present invention, if there are descriptions of first, second, third, etc., they are only used to distinguish technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0068] "And / or" is used to indicate that one or both of the stated situations may occur, for example, A and / or B includes (A and B) and (A or B).

[0069] Unless otherwise specified, "normal temperature" in the present invention means (25±5)°C.

[0070] Example 1

[0071] This embodiment provides a polylactic acid nonwoven fabric (mask base fabric) with a persistent charge, and the preparation process is as follows: Figure 1 As shown, the specific process is:

[0072] (1) At room temperature, a polylactic acid (PLA) nonwoven fabric (purchased from Shenzhen Guanghua Weiye Co., Ltd.) was immersed in deionized water for 5 minutes to completely wet it;

[0073] (2) The concentration used is 1×10 -4 mol / L (0.1mmol / L) NaCl salt solution was used as the water electret solution to carry out water electret process modification treatment;

[0074] (3) Water electret process modification treatment: first, pour the prepared water electret solution into the water electret equipment, keep the water droplets of the nozzle perpendicular to the surface of the polylactic acid non-woven fabric, set the high-pressure water flow pressure parameter of the equipment to 5 MPa, and move the polylactic acid non-woven fabric at a uniform speed for friction treatment to obtain the polylactic acid non-woven fabric after electret treatment;

[0075] (4) After the water electret process modification treatment, negative pressure suction is performed, the pressure is set to 4 bar, and the treatment time is 3 minutes; then the sample is placed in an oven and dried at 40°C for 2 hours; the drying is completed.

[0076] Example 2

[0077] This embodiment provides a polylactic acid nonwoven fabric with a persistent charge. The specific process is different from that of Example 1 only in that: a concentration of 1×10 -4 mol / L NaCl salt solution was replaced with deionized water solution and water electret process modification was carried out.

[0078] Example 3

[0079] This embodiment provides a polylactic acid nonwoven fabric with a persistent charge. The specific process is different from that of Example 1 only in that a water electret process modification treatment is performed under a pressure of 3 MPa.

[0080] Example 4

[0081] This embodiment provides a polylactic acid nonwoven fabric with a persistent charge. The specific process is different from that of Example 1 only in that: a water electret process modification treatment is performed under a pressure of 4 MPa.

[0082] Example 5

[0083] This embodiment provides a facial mask containing a nutrient solution and a facial mask base fabric; the facial mask base fabric is the polylactic acid non-woven fabric with a persistent charge prepared in Example 1.

[0084] Example 6

[0085] This embodiment provides a facial mask containing a nutrient solution and a facial mask base fabric; the facial mask base fabric is the polylactic acid non-woven fabric with a persistent charge prepared in Example 2.

[0086] Example 7

[0087] This embodiment provides a facial mask containing a nutrient solution and a facial mask base fabric; the facial mask base fabric is the polylactic acid non-woven fabric with a persistent charge prepared in Example 3.

[0088] Example 8

[0089] This embodiment provides a facial mask containing a nutrient solution and a facial mask base fabric; the facial mask base fabric is the polylactic acid non-woven fabric with a persistent charge prepared in Example 4.

[0090] Test example

[0091] This test example measured the properties of the polylactic acid nonwoven fabrics with persistent charge prepared in Examples 1-4, as follows:

[0092] 1. Surface electrostatic potential measurement

[0093] Experimental method: The surface electrostatic potential of the polylactic acid nonwoven fabrics with persistent charge prepared in Examples 1-4 was measured using a YHT electrostatic tester.

[0094] Table 1

[0095] Test items Example 1 Example 2 Example 3 Example 4 Surface electrostatic potential (v) 730 400 620 680

[0096] The results are shown in Table 1. It can be seen from the table that the surface electrostatic potential of the polylactic acid nonwoven fabric with persistent charge prepared in Example 1 is the best. Therefore, the concentration of 1×10 -4 mol / L NaCl salt solution was used as the water electret solution, and the pressure of the water electret process modification treatment was set to 5 MPa.

[0097] 2. Determination of breaking strength and elongation

[0098] Experimental methods:

[0099] The test equipment is YG026h electronic fabric strength machine.

[0100] Five strips of uniform width, 50 mm wide and 100 mm long, were cut from each of the hydroelectret-treated and untreated PLA nonwoven fabrics. The test type was set to tensile, with a travel speed of 100 mm / min and a clamping distance of 100 mm.

[0101] Start the equipment and test the sample at the set speed. The instrument automatically records the maximum tensile force (breaking strength) and elongation at break of the sample. Test each group of 5 samples in sequence, and take the arithmetic mean of the breaking strength and elongation as the final result.

[0102] Table 2

[0103] Test items As is Example 1 Breaking strength (N) 41.5 40.4 Elongation at break (%) 64.9 71.9

[0104] The results are shown in Table 2. It can be seen from the table that the polylactic acid non-woven fabric (mask base fabric) with persistent charge prepared in Example 1 of the present invention has excellent mechanical properties and durability, and is easy to process and shape. Compared with the original polylactic acid non-woven fabric that has not been modified by the water electret process, the mask base fabric prepared in Example 1 of the present invention shows better ductility after being treated by the water spunlace process. When the user lightly pulls or tears it during use, it will not cause it to break or deform, thereby better maintaining its integrity.

[0105] 3. Liquid holdup determination

[0106] Experimental Method: The polylactic acid nonwoven fabric with a persistent charge prepared in Example 1 was immersed in a nutrient solution (Proya's essence: ingredients include water, methyl gluceth-20, glycerin, PEG / PPG-14 / 7 dimethyl ether, niacinamide, polyethylene glycol-75, bis-PEG-18 methyl ether dimethyl silane, glyceryl glucoside, 1,2-hexanediol, parahydroxyacetophenone, carbomer, madecassoside, tromethamine, trehalose, allantoin, and 1,3-propylene glycol) for 10 minutes at 25°C to measure the liquid holdup. A polylactic acid nonwoven fabric that had not been modified with the water electret process was treated identically as a control group.

[0107] Table 3

[0108] Test items As is Example 1 Liquid holdup (%) 1041.1 1339.8

[0109] The results are shown in Table 3. It can be seen from the table that the liquid holding capacity of the facial mask base cloth treated with water electret technology prepared in Example 1 is 1.3 times the mass of the original facial mask base cloth, and the liquid holding rate is greatly increased compared with the original base cloth. The mass ratio of facial mask base cloth to nutrient solution on the market is currently in the range of 1:10-11. The facial mask base cloth prepared in the embodiment of the present invention fully meets the above requirements.

[0110] 4. Surface potential and surface potential stability test

[0111] (1) Surface potential stability test

[0112] Experimental Method: The polylactic acid nonwoven fabric with a persistent charge, prepared in Example 1, was completely immersed in deionized water and then dried. This process was repeated three times. The surface potential of the dried sample after water electret charging was measured using a YHT electrostatic tester. Each sample was tested six times, and the average value was calculated as the measurement result. This study investigated whether the surface potential of the polylactic acid nonwoven fabric treated with water electret technology could be stored stably after repeated immersion.

[0113] (2) Surface potential stability test

[0114] Experimental Method: The persistently charged polylactic acid (PLA) nonwoven fabric prepared in Example 1 was immersed in deionized water for 140 hours. The changes in the surface zeta potential of the PLA nonwoven fabric were measured at 20-hour intervals using a Sur-PASS solid surface zeta potential meter. Each sample was tested six times, and the average value was calculated as the measurement result. This study investigated the long-term storage of the surface zeta potential of the PLA nonwoven fabric treated with the hydroelectret technique after long-term immersion.

[0115] Table 4

[0116] Repeated dipping times once Secondary three times Surface electrostatic potential (V) 720 690 660

[0117] Table 5

[0118]

[0119] The results are shown in Tables 4-5. It can be seen from the table that the surface potential of the polylactic acid non-woven fabric with persistent charge prepared in Example 1 remains stable after repeated immersion and drying or long-term immersion for 140 hours in deionized water, and the surface Zeta potential is stored for a long time.

[0120] While the embodiments of the present invention have been described in detail above with reference to the accompanying drawings, the present invention is not limited to the embodiments described above. Various modifications may be made within the scope of knowledge possessed by a person skilled in the art without departing from the spirit of the present invention. Furthermore, the embodiments of the present invention and the features thereof may be combined with one another unless there is a conflict.

Claims

1. A charged polylactic acid nonwoven fabric, characterized in that: The polylactic acid nonwoven fabric is prepared by subjecting it to water electret treatment.

2. The charged polylactic acid nonwoven fabric according to claim 1, characterized in that: The surface electrostatic potential of the charged polylactic acid nonwoven fabric is 600-750V; And / or, the surface Zeta potential of the charged polylactic acid non-woven fabric is -18 to -33 mV.

3. The charged polylactic acid nonwoven fabric according to claim 1, characterized in that: The water electret treatment specifically includes the following steps: adding the treatment liquid used for the water electret treatment into a high-pressure water flow treatment device, and then performing the electret treatment on the polylactic acid non-woven fabric through the high-pressure water flow treatment device.

4. The charged polylactic acid nonwoven fabric according to claim 1, characterized in that The pressure used in the water electret treatment is 3-6 MPa; And / or, the treatment solution used in the water electret treatment includes one of a NaCl solution with a concentration of 0.01-0.5 mmol / L and water; And / or, after the water electret treatment, the steps of negative pressure treatment and drying are further included in sequence.

5. A method for preparing a charged polylactic acid nonwoven fabric according to any one of claims 1 to 4, characterized in that: The preparation method comprises the following steps: preparing the polylactic acid non-woven fabric by subjecting it to water electret treatment.

6. The preparation method according to claim 5, characterized in that The water electret treatment specifically includes the following steps: adding the treatment liquid used for the water electret treatment into a high-pressure water flow treatment device, and then performing the electret treatment on the polylactic acid non-woven fabric through the high-pressure water flow treatment device; And / or, the pressure used in the water electret treatment is 3-6 MPa; And / or, the treatment solution used in the water electret treatment includes one of a NaCl solution with a concentration of 0.01-0.5 mmol / L and water; And / or, after the water electret treatment, the steps of negative pressure treatment and drying are further included in sequence.

7. Use of the charged polylactic acid non-woven fabric according to any one of claims 1 to 4 in preparing a facial mask base fabric or a facial mask.

8. Use of the charged polylactic acid nonwoven fabric according to any one of claims 1 to 4 in the preparation of products for anti-aging, moisturizing, absorption-promoting and / or penetration-promoting purposes; Preferably, the product is a skin care product, a cosmetic or a medicine.

9. A facial mask base fabric, characterized in that: The invention comprises the charged polylactic acid nonwoven fabric as described in any one of claims 1 to 4.

10. A facial mask, characterized in that: The invention comprises the charged polylactic acid nonwoven fabric as described in any one of claims 1 to 4.

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