Production method of wormwood composite spunlaced non-woven fabric

Abstract

A production method of wormwood composite spunlaced non-woven fabric comprises the steps that firstly, wormwood fibers and cotton fibers are used as raw materials to obtain spunlaced fabric, then the spunlaced fabric is placed in a reaction kettle of a supercritical device, then supercritical carbon dioxide fluid is input into the reaction kettle for a degreasing reaction, after the degreasing reaction is finished, the reaction kettle and a separation kettle are communicated, and the wormwood composite spunlaced non-woven fabric is obtained. The method comprises the following steps: adding a supercritical carbon dioxide fluid into a reaction kettle, enabling the supercritical fluid in the reaction kettle to flow into a separation kettle, gasifying, cutting off the reaction kettle and the separation kettle until all the supercritical fluid flows out of the reaction kettle, inputting the supercritical carbon dioxide fluid into the reaction kettle for finishing reaction, and after finishing reaction is finished, releasing the pressure of the reaction kettle until all the supercritical fluid is gasified, the wormwood composite spunlaced non-woven fabric can be obtained. According to the design, the combination firmness is high, the pharmacological effect is good, the slow release time is long, and the carrying capacity per unit volume is large.

Description

TECHNICAL FIELD

[0001] The present application relates to a composite wormwood non-woven fabric, belonging to the field of non-woven fabrics, in particular to a production method of a wormwood composite spunlace non-woven fabric. BACKGROUND

[0002] Spunlace non-woven fabric (also known as spunlace non-woven fabric or hydroentangled non-woven fabric) is a kind of non-woven fabric obtained by pre-wetting, carding, hydroentangling, webbing and reinforcing treatment of fiber web through high-pressure micro-fine water jet in water medium. Spunlace non-woven fabric has been widely used in many fields, such as sanitary products (such as sanitary napkins and wet wipes), medical supplies (such as surgical gowns and masks), filter materials (such as air filters and liquid filters), packaging materials (such as cushion packaging and food packaging), etc.

[0003] Wormwood, also known as mugwort or sweet wormwood, is a plant with strong aroma, belonging to the genus Artemisia. Modern research shows that wormwood has many pharmacological effects, such as antibacterial, anti-inflammatory, antioxidant, antitumor, antiviral, etc.

[0004] Therefore, if the pharmacological components in wormwood can be combined in spunlace non-woven fabric, the antibacterial property of spunlace non-woven fabric will be enhanced, and the application of spunlace non-woven fabric in the field of sanitary products and medical supplies will be expanded. However, the existing technology is to wrap wormwood powder in textiles or to mix wormwood fibers with other fibers for spinning, which has the following defects: Firstly, it is the wormwood itself that directly plays a role, not the effective components in wormwood, which reduces the pharmacological effect of wormwood; Secondly, the combination of wormwood powder or wormwood fiber is weak, which is not conducive to the long-term exertion of the pharmacological effect of wormwood.

[0005] The information disclosed in this background section is only intended to increase the understanding of the overall background of the present application and should not be considered as acknowledging or implying in any form that this information constitutes prior art known to those skilled in the art. SUMMARY

[0006] The purpose of the present application is to overcome the defects and problems of weak combination and poor pharmacological effect in the prior art, and to provide a production method of wormwood composite spunlace non-woven fabric with strong combination and good pharmacological effect.

[0007] To achieve the above purpose, the technical solution of the present application is as follows: a production method of wormwood composite spunlace non-woven fabric, comprising the following steps: First step: using wormwood fiber and cotton fiber as raw materials, water jet is carried out to obtain spunlace fabric; Step 2: First, put the spunlace fabric into the supercritical reactor, then cover the reactor with the lid, and then introduce supercritical carbon dioxide fluid into the reactor until it is full to carry out the degreasing reaction. After the degreasing reaction is completed, connect the reactor and the separation vessel to allow the supercritical fluid in the reactor to flow into the separation vessel and vaporize. After all the supercritical fluid has flowed out of the reactor, disconnect the reactor and the separation vessel. Step 3: First, introduce supercritical carbon dioxide fluid into the reactor until it is full to carry out the finishing reaction. After the finishing reaction is completed, open the exhaust valve of the reactor to release the pressure until all the supercritical fluid is vaporized. Then open the lid of the reactor to take out the finished spunlace fabric, which is the Artemisia argyi composite spunlace nonwoven fabric.

[0008] In the second step, the operating parameters for the degreasing reaction are: temperature 50-70℃, pressure 8-10 MPa, and time 4-6 hours. In the third step, the operating parameters for the finishing reaction are: temperature 75-85℃, pressure 20-25 MPa, and time 30-60 min.

[0009] In the second step, the degreasing reaction is carried out at a temperature of 60°C; In the third step, the temperature of the finishing reaction is 80°C.

[0010] In the first step, the ratio of the amount of mugwort fiber to cotton fiber is 7-3:3-7.

[0011] In the first step, the ratio of mugwort fiber to cotton fiber is 7:3.

[0012] In the first step, the length of the mugwort fiber is 25-30 mm.

[0013] In the first step, the cotton fiber is a fine cotton fiber with a length of 25-30mm.

[0014] In the first step, the process of using artemisia fiber and cotton fiber as raw materials to perform hydroentangling to obtain spunlace fabric refers to: First, the raw materials of mugwort fiber and cotton fiber are opened into single fibers. Then, the opened mugwort fiber and cotton fiber are mixed to make the mugwort fiber and cotton fiber intertwine. Then, they are combed into a web to obtain an initial fiber web. The initial fiber web is then sent into the hydroentangling zone. The water needles in the hydroentangling zone will pass through the initial fiber web and hydroentangle the mugwort fiber and cotton fiber in the initial fiber web. After entanglement, it is dried to obtain hydroentangled fabric.

[0015] Between the second and third steps, a cleaning step is added, which is repeated 3-5 times. A single cleaning step refers to: First, supercritical carbon dioxide fluid is introduced into the reactor until it is full to carry out a cleaning reaction. The cleaning reaction takes less time than the degreasing reaction. After the cleaning reaction is completed, the reactor and the separation vessel are connected to allow the supercritical fluid in the reactor to flow into the separation vessel until all the supercritical fluid is vaporized. Then, the reactor and the separation vessel are shut off.

[0016] In the second and third steps, the introduction of supercritical carbon dioxide fluid into the reactor refers to: First, gaseous carbon dioxide is introduced into the front-end pipe inside the supercritical device from a carbon dioxide gas source located outside the supercritical device. After the temperature and pressure inside the front-end pipe reach the set reaction parameters, the gaseous carbon dioxide in the front-end pipe has been converted into liquid supercritical fluid. Then, the front-end pipe and the reactor are connected to introduce the supercritical fluid into the reactor. Subsequently, gaseous carbon dioxide is continuously introduced into the front-end pipe, and supercritical fluid is continuously introduced into the reactor.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. In the production method of the Artemisia argyi composite spunlace nonwoven fabric of the present invention, Artemisia argyi fiber and cotton fiber are first used to make spunlace fabric, and then supercritical fluid is used to remove impurities from the cotton fibers in the spunlace fabric, mainly for degreasing. Then, supercritical fluid is used to extract the Artemisia argyi fiber in the spunlace fabric, while the cotton fibers are treated to obtain the Artemisia argyi composite spunlace nonwoven fabric. The advantages of this design include: Firstly, in this design, the active ingredient of Artemisia argyi extracted by supercritical fluid is combined with the cotton fiber, rather than the original Artemisia argyi itself. This results in a stronger pharmacological effect and is more conducive to the exertion of the pharmacological effect of subsequent products. Secondly, in this design, before extracting the mugwort fiber, the cotton fiber is first cleaned with supercritical fluid. This serves several purposes: firstly, it facilitates the subsequent contact between the supercritical fluid and the mugwort fiber, improving the extraction effect; secondly, it expands the space of the cavity in the cotton fiber, allowing the effective components of mugwort to enter the cavity, which not only improves the binding strength but also has a slow-release effect, prolonging the duration of the mugwort's medicinal effects; and thirdly, it removes the impurities that were originally located in the cotton fiber, facilitating the subsequent binding of the effective components of mugwort on the surface of the cotton fiber and increasing the content of effective components of mugwort per unit volume. Thirdly, supercritical fluids possess strong solubility and diffusivity. This characteristic allows them to achieve good impurity removal effects not only during the initial impurity removal of cotton fibers, but also to maximize the extraction of the effective components of Artemisia argyi during subsequent extraction. Furthermore, after extraction, the diffusivity of supercritical fluids is fully utilized to allow the effective components of Artemisia argyi dissolved within them to diffuse fully within the cotton fibers, delivering them to all the cavities of the cotton fibers and other parts of the cotton fiber surface as much as possible (the removal of pectin wax creates tiny grooves on the cotton fiber surface where oils were originally attached, increasing the specific surface area of ​​the cotton fibers, which not only increases the binding sites of Artemisia argyi components, but also attaches the effective components of Artemisia argyi to the surface of the final spunlace fabric, playing a role in timely action). While ensuring strong binding, this maximizes the amount of effective components of Artemisia argyi carried per unit volume, enhancing the pharmacological effect of the final product. Therefore, the present invention not only has strong binding strength and better pharmacological effect, but also has a long sustained release time and a large amount carried per unit volume.

[0018] 2. In the production method of the Artemisia argyi composite spunlace nonwoven fabric of the present invention, during the second step of the degreasing reaction, the operating parameters of the degreasing reaction are limited to a temperature of 50-70℃ and a pressure of 8-10 MPa. At the same time, during the third step of the finishing reaction, the operating parameters of the finishing reaction are limited to a temperature of 75-85℃ and a pressure of 20-25 MPa. This design can ensure that the cotton wax and oil in the cotton fiber are melted during the aforementioned degreasing reaction, thereby increasing the solubility of impurities in the supercritical fluid and enhancing the impurity removal effect. It can also ensure that the effective components in the Artemisia argyi fiber are not extracted by the low pressure and low temperature (of course, some extraction is certain, but even this small amount of extracted Artemisia argyi components can combine with the cotton fiber in the reaction vessel, rather than being completely removed, thereby increasing the surface pharmacological effect of the final spunlace fabric). This allows for the large-scale extraction of the effective components of Artemisia argyi in the third step, which is conducive to the combination with the degreased cotton fiber, improves the bonding strength, and increases the carrying capacity per unit volume. Therefore, the present invention not only has better degreasing and extraction effects, but also has a strong connection between the degreasing and extraction reactions, which is conducive to improving the pharmacological effect.

[0019] 3. In the production method of the Artemisia argyi composite spunlace nonwoven fabric of the present invention, a degreasing followed by extraction and finishing process is adopted, which can save the cotton fiber bleaching process required in the prior art. The reason is that since Artemisia argyi fiber itself has color (mainly natural plant pigments such as chlorophyll, and flavonoids such as kaempferol, cyanidin, and isoesin, among which flavonoids have anti-inflammatory, antioxidant, and anti-tumor pharmacological activities), there is no need to consider bleaching. This not only saves the use of corresponding agents, but also retains the flavonoid components that constitute the pigment of cotton fibers, so as to exert the antibacterial properties of the flavonoid components themselves, thereby improving the overall antibacterial properties of the product. Therefore, the present invention not only saves costs, but also has a strong antibacterial effect.

[0020] 4. In the production method of the mugwort composite spunlace nonwoven fabric of the present invention, when making the spunlace fabric, it is preferable to first open the raw materials of mugwort fiber and cotton fiber into single fibers, then mix the opened mugwort fiber and cotton fiber to make the mugwort fiber and cotton fiber intertwine, and then comb them into a web to obtain an initial fiber web. The initial fiber web is then sent into the spunlace zone, where the water needles in the spunlace zone pass through the initial fiber web and hydroentangle the mugwort fiber and cotton fiber in the initial fiber web. After entanglement, it is dried to obtain the spunlace fabric. The advantages of this design include: Firstly, it strengthens the bond between mugwort fibers and cotton fibers, which helps to improve the bond between the effective components of mugwort and cotton fibers in the future. Secondly, the entanglement of mugwort fibers and cotton fibers makes it easier for the effective components extracted from the mugwort fibers to diffuse efficiently into the adjacent cotton fibers, thus improving the breadth and uniformity of the bond. Thirdly, composite spunlace nonwoven fabrics have a higher overall loft than single-component Artemisia argyi fiber spunlace fabrics due to the natural crimp of cotton fibers, resulting in better breathability and making them more advantageous when used in medical materials. Therefore, this invention not only has a stronger binding force of the effective components of Artemisia argyi and better pharmacological effects, but also better breathability, making it more suitable for application in the medical and health fields. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of cotton fiber in this invention.

[0022] Figure 2 yes Figure 1 A schematic diagram of the cross-section of cotton fiber.

[0023] Figure 3 This is a schematic diagram of the cross-section of cotton fibers after degreasing in this invention. Detailed Implementation

[0024] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] See Figure 1 — Figure 3 A method for producing an artemisia-infused composite spunlace nonwoven fabric includes the following steps: Step 1: Using mugwort fiber and cotton fiber as raw materials, hydroentanglement is carried out to obtain spunlace fabric; Step 2: First, put the spunlace fabric into the supercritical reactor, then cover the reactor with the lid, and then introduce supercritical carbon dioxide fluid into the reactor until it is full to carry out the degreasing reaction. After the degreasing reaction is completed, connect the reactor and the separation vessel to allow the supercritical fluid in the reactor to flow into the separation vessel and vaporize. After all the supercritical fluid has flowed out of the reactor, disconnect the reactor and the separation vessel. Step 3: First, introduce supercritical carbon dioxide fluid into the reactor until it is full to carry out the finishing reaction. After the finishing reaction is completed, open the exhaust valve of the reactor to release the pressure until all the supercritical fluid is vaporized. Then open the lid of the reactor to take out the finished spunlace fabric, which is the Artemisia argyi composite spunlace nonwoven fabric.

[0026] In the second step, the operating parameters for the degreasing reaction are: temperature 50-70℃, pressure 8-10 MPa, and time 4-6 hours. In the third step, the operating parameters for the finishing reaction are: temperature 75-85℃, pressure 20-25 MPa, and time 30-60 min.

[0027] In the second step, the degreasing reaction is carried out at a temperature of 60°C; In the third step, the temperature of the finishing reaction is 80°C.

[0028] In the first step, the ratio of the amount of mugwort fiber to cotton fiber is 7-3:3-7.

[0029] In the first step, the ratio of mugwort fiber to cotton fiber is 7:3.

[0030] In the first step, the length of the mugwort fiber is 25-30 mm.

[0031] In the first step, the cotton fiber is a fine cotton fiber with a length of 25-30mm.

[0032] In the first step, the process of using artemisia fiber and cotton fiber as raw materials to perform hydroentangling to obtain spunlace fabric refers to: First, the raw materials of mugwort fiber and cotton fiber are opened into single fibers. Then, the opened mugwort fiber and cotton fiber are mixed to make the mugwort fiber and cotton fiber intertwine. Then, they are combed into a web to obtain an initial fiber web. The initial fiber web is then sent into the hydroentangling zone. The water needles in the hydroentangling zone will pass through the initial fiber web and hydroentangle the mugwort fiber and cotton fiber in the initial fiber web. After entanglement, it is dried to obtain hydroentangled fabric.

[0033] Between the second and third steps, a cleaning step is added, which is repeated 3-5 times. A single cleaning step refers to: First, supercritical carbon dioxide fluid is introduced into the reactor until it is full to carry out a cleaning reaction. The cleaning reaction takes less time than the degreasing reaction. After the cleaning reaction is completed, the reactor and the separation vessel are connected to allow the supercritical fluid in the reactor to flow into the separation vessel until all the supercritical fluid is vaporized. Then, the reactor and the separation vessel are shut off.

[0034] In the second and third steps, the introduction of supercritical carbon dioxide fluid into the reactor refers to: First, gaseous carbon dioxide is introduced into the front-end pipe inside the supercritical device from a carbon dioxide gas source located outside the supercritical device. After the temperature and pressure inside the front-end pipe reach the set reaction parameters, the gaseous carbon dioxide in the front-end pipe has been converted into liquid supercritical fluid. Then, the front-end pipe and the reactor are connected to introduce the supercritical fluid into the reactor. Subsequently, gaseous carbon dioxide is continuously introduced into the front-end pipe, and supercritical fluid is continuously introduced into the reactor.

[0035] The supplementary technical features of this invention are as follows: The supercritical carbon dioxide fluid in this invention possesses characteristics such as high solubility, high density, and high diffusivity. In the supercritical state, the solubility of carbon dioxide increases significantly, effectively dissolving and extracting organic substances. During supercritical carbon dioxide extraction, the supercritical carbon dioxide fluid comes into contact with the substance to be separated under high pressure. By adjusting the temperature and pressure, a large density difference is created between the substance and the supercritical carbon dioxide fluid, thereby achieving separation. The high diffusivity of the supercritical carbon dioxide fluid allows it to rapidly penetrate into the interior of solid substances, dissolving and carrying away organic matter. Therefore, supercritical carbon dioxide extraction technology is widely used in the extraction and separation processes of natural products, pharmaceuticals, food, and fragrances.

[0036] like Figure 1 , Figure 2As shown, the secondary wall of cotton fibers is very dense. Conventional liquids, such as water, cannot easily penetrate the secondary wall to enter the inner cavity of the cotton fibers. However, supercritical fluids, with their high solubility and diffusivity, can easily penetrate the secondary wall to enter the inner cavity of the cotton fibers, delivering the active ingredients of the mugwort into the cavity, thus ensuring a strong bond between the active ingredients and the cotton fibers. Furthermore, after bonding, due to the effect of the secondary wall, it is not easily washed away by water. Instead, it is slowly released through the self-diffusion of the active ingredients of the mugwort (the secondary wall is a dense crystalline region with a high molecular density and no capillary effect; substances within the cavity surrounded by the secondary wall are not rapidly dissolved and consumed upon contact with the external liquid environment, such as when used in wound dressings; instead, they slowly diffuse to the outer layer of the fibers through molecular motion, thus achieving a more lasting effect), thereby exerting a sustained-release effect.

[0037] like Figure 2 , Figure 3 As shown, cotton fibers naturally have cavities inside, but they may contain impurities such as cotton wax and grease. When cotton fibers are degreased by supercritical fluid, the cavities of the cotton fibers become not only emptier but also wider, which is more conducive to the subsequent entry of the effective components of mugwort.

[0038] In the first step of this invention, the mugwort fiber is preferably mugwort viscose fiber or a natural fiber made from the stems and leaves of mugwort after processing. Mugwort viscose fiber refers to viscose fiber spun by adding mugwort components during the wet spinning process.

[0039] In this invention, the lengths of the mugwort fibers and cotton fibers are similar, preferably with the mugwort fibers being 25-30 mm long and the cotton fibers being fine cotton fibers with a length of 25-30 mm. This similar length design facilitates better mixing and weaving of the mugwort and cotton fibers. If the lengths of the viscose fibers and cotton fibers differ too much, it is not conducive to the composite web formation or the subsequent hydroentangling fabric production.

[0040] Example 1: See Figure 1 — Figure 3 A method for producing an artemisia-infused composite spunlace nonwoven fabric includes the following steps: Step 1: Using mugwort fiber and cotton fiber as raw materials, hydroentanglement is carried out to obtain spunlace fabric; Step 2: First, put the spunlace fabric into the supercritical reactor, then cover the reactor with the lid, and then introduce supercritical carbon dioxide fluid into the reactor until it is full to carry out the degreasing reaction. The preferred operating parameters for the degreasing reaction are: temperature 50-70℃, pressure 8-10 MPa, and time 4-6 hours. After the degreasing reaction is completed, connect the reactor and the separation vessel to allow the supercritical fluid in the reactor to flow into the separation vessel and vaporize. After all the supercritical fluid has flowed out of the reactor, disconnect the reactor and the separation vessel. Step 3: First, introduce supercritical carbon dioxide fluid into the reactor until it is full to carry out the finishing reaction. The preferred operating parameters for the finishing reaction are: temperature 75-85℃, pressure 20-25 MPa, and time 30-60 min. After the finishing reaction is completed, open the exhaust valve of the reactor to release the pressure until all the supercritical fluid is vaporized. Then, open the lid of the reactor to take out the finished spunlace fabric, which is the Artemisia argyi composite spunlace nonwoven fabric.

[0041] Example 2: The basic content is the same as in Example 1, except that: In the second step, the degreasing reaction temperature is preferably 60°C; in the third step, the finishing reaction temperature is preferably 80°C.

[0042] Example 3: The basic content is the same as in Example 1, except that: Preferably, in the first step, the ratio of mugwort fiber to cotton fiber is 7-3:3-7.

[0043] If the proportion of cotton fiber is higher, the composite spunlace nonwoven fabric will have better breathability; if the proportion of artemisia fiber is higher, the composite spunlace nonwoven fabric will have better antibacterial properties.

[0044] However, the optimal ratio is 7:3 between mugwort viscose fiber and cotton fiber, at which point the moisture absorption, breathability, and antibacterial properties are all excellent.

[0045] Example 4: The basic content is the same as in Example 1, except that: Preferably, in the first step, the lengths of the mugwort fiber and the cotton fiber are similar, and more preferably, the length of the mugwort fiber is 25-30mm, and the cotton fiber is fine cotton fiber with a length of 25-30mm.

[0046] Example 5: The basic content is the same as in Example 1, except that: Between the second and third steps, a cleaning step is added, which is repeated 3 to 5 times. A single cleaning step refers to: first, supercritical carbon dioxide fluid is introduced into the reactor until it is full to carry out the cleaning reaction. The cleaning reaction time is less than that of the degreasing reaction. After the cleaning reaction is completed, the reactor and the separation vessel are connected to allow the supercritical fluid in the reactor to flow into the separation vessel until all the supercritical fluid is vaporized. Then the reactor and the separation vessel are shut off.

[0047] The above description is only a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. Any equivalent modifications or changes made by those skilled in the art based on the content disclosed in the present invention should be included within the scope of protection set forth in the claims.

Claims

1. A method for producing a mugwort composite spunlace nonwoven fabric, characterized in that: The production method includes the following steps: Step 1: Using mugwort fiber and cotton fiber as raw materials, hydroentanglement is carried out to obtain spunlace fabric; Step 2: First, put the spunlace fabric into the supercritical reactor, then cover the reactor with the lid, and then introduce supercritical carbon dioxide fluid into the reactor until it is full to carry out the degreasing reaction. After the degreasing reaction is completed, connect the reactor and the separation vessel to allow the supercritical fluid in the reactor to flow into the separation vessel and vaporize. After all the supercritical fluid has flowed out of the reactor, disconnect the reactor and the separation vessel. Step 3: First, introduce supercritical carbon dioxide fluid into the reactor until it is full to carry out the finishing reaction. After the finishing reaction is completed, open the exhaust valve of the reactor to release the pressure until all the supercritical fluid is vaporized. Then open the lid of the reactor to take out the finished spunlace fabric, which is the Artemisia argyi composite spunlace nonwoven fabric.

2. The method for producing a mugwort composite spunlace nonwoven fabric according to claim 1, characterized in that: In the second step, the operating parameters for the degreasing reaction are: temperature 50-70℃, pressure 8-10 MPa, and time 4-6 hours. In the third step, the operating parameters for the finishing reaction are: temperature 75-85℃, pressure 20-25 MPa, and time 30-60 min.

3. The method for producing a mugwort composite spunlace nonwoven fabric according to claim 2, characterized in that: In the second step, the degreasing reaction is carried out at a temperature of 60°C; In the third step, the temperature of the finishing reaction is 80°C.

4. A method for producing an Artemisia argyi composite spunlace nonwoven fabric according to claim 1, 2, or 3, characterized in that: In the first step, the ratio of the amount of mugwort fiber to cotton fiber is 7-3:3-7.

5. The method for producing a mugwort composite spunlace nonwoven fabric according to claim 4, characterized in that: In the first step, the ratio of mugwort fiber to cotton fiber is 7:

3.

6. A method for producing an Artemisia argyi composite spunlace nonwoven fabric according to claim 1, 2, or 3, characterized in that: In the first step, the length of the mugwort fiber is 25-30 mm.

7. The method for producing a mugwort composite spunlace nonwoven fabric according to claim 6, characterized in that: In the first step, the cotton fiber is a fine cotton fiber with a length of 25-30mm.

8. A method for producing an Artemisia argyi composite spunlace nonwoven fabric according to claim 1, 2 or 3, characterized in that: In the first step, the process of using artemisia fiber and cotton fiber as raw materials to perform hydroentangling to obtain spunlace fabric refers to: First, the raw materials of mugwort fiber and cotton fiber are opened into single fibers. Then, the opened mugwort fiber and cotton fiber are mixed to make the mugwort fiber and cotton fiber intertwine. Then, they are combed into a web to obtain an initial fiber web. The initial fiber web is then sent into the hydroentangling zone. The water needles in the hydroentangling zone will pass through the initial fiber web and hydroentangle the mugwort fiber and cotton fiber in the initial fiber web. After entanglement, it is dried to obtain hydroentangled fabric.

9. A method for producing an Artemisia argyi composite spunlace nonwoven fabric according to claim 1, 2 or 3, characterized in that: Between the second and third steps, a cleaning step is added, which is repeated 3-5 times. A single cleaning step refers to: First, supercritical carbon dioxide fluid is introduced into the reactor until it is full to carry out a cleaning reaction. The cleaning reaction takes less time than the degreasing reaction. After the cleaning reaction is completed, the reactor and the separation vessel are connected to allow the supercritical fluid in the reactor to flow into the separation vessel until all the supercritical fluid is vaporized. Then, the reactor and the separation vessel are shut off.

10. A method for producing an Artemisia argyi composite spunlace nonwoven fabric according to claim 1, 2 or 3, characterized in that: In the second and third steps, the introduction of supercritical carbon dioxide fluid into the reactor refers to: First, gaseous carbon dioxide is introduced into the front-end pipe inside the supercritical device from a carbon dioxide gas source located outside the supercritical device. After the temperature and pressure inside the front-end pipe reach the set reaction parameters, the gaseous carbon dioxide in the front-end pipe has been converted into liquid supercritical fluid. Then, the front-end pipe and the reactor are connected to introduce the supercritical fluid into the reactor. Subsequently, gaseous carbon dioxide is continuously introduced into the front-end pipe, and supercritical fluid is continuously introduced into the reactor.

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