Production method of cotton spunlace non-woven fabric for supercritical finishing of wormwood

Abstract

A cotton spunlace non-woven fabric production method for supercritical finishing of wormwood comprises the steps that firstly, air-dried wormwood powder is extracted through supercritical CO2 fluid, wormwood extract obtained in the extraction process is dissolved in ultra-critical fluid, after extraction is finished, the ultra-critical fluid is gasified to obtain the wormwood extract, and then the cotton spunlace non-woven fabric is obtained. The preparation method comprises the following steps: preparing a wormwood extract, mixing the wormwood extract with a finishing agent, an ultra-critical fluid and cotton spunlaced cloth to perform mixed finishing on the cotton spunlaced cloth, releasing pressure and gasifying the ultra-critical fluid after the mixed finishing is finished to obtain the cotton spunlaced non-woven fabric with the wormwood subjected to supercritical finishing. According to the design, the wormwood extraction effect is good, the wormwood adding effect is good, the combination effect is high, and washing resistance is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to a functional cotton water-jet non-woven fabric, belonging to the field of non-woven fabrics, in particular to a production method of a cotton water-jet non-woven fabric with supercritical finishing of wormwood. BACKGROUND

[0002] Water-jet non-woven fabric (also known as water-jet non-woven fabric or water-needle non-woven fabric) is a kind of non-woven fabric obtained by pre-wetting, carding, hydrodynamic drafting, webbing and reinforcing treatment of fiber web through high-pressure micro-fine water jet in water medium. This kind of non-woven fabric has the characteristics of fiber web interweaving, stable structure, multi-level, uniform distribution, consistent longitudinal and transverse strength, wear resistance, light weight, flexibility, anti-static, and not easy to tear. Water-jet 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. The characteristic of wormwood is that the stems and leaves are covered with gray-white short down, the leaves are thick and paper-like, with notched serrated teeth, and the edges of the split pieces are finely serrated. Wormwood is a perennial herb, usually flowering in summer, with light yellow or yellow-green flowers. Modern research shows that wormwood has many pharmacological effects, such as antibacterial, anti-inflammatory, antioxidant, antitumor, antiviral, etc. Wormwood contains volatile oil, flavonoids, phenylpropanoids, fatty acids and trace elements, among which volatile oil is one of the main active ingredients.

[0004] Therefore, if the effective components of wormwood can be combined into water-jet non-woven fabric, the pharmacological effect of water-jet non-woven fabric will be improved, and its application effect in sanitary products and medical supplies will be expanded.

[0005] The invention patent application with application number 201910514775.3 and application name "Wormwood antibacterial melt-blown non-woven material and its preparation method" discloses a wormwood antibacterial melt-blown non-woven material and its preparation method. After the wormwood particles and polymer master batch are thoroughly mixed, they are fed into the screw rod for heating and melting, then extruded from the spinneret head through the metering pump, stretched by hot air, and received by the curtain to form a wormwood antibacterial melt-blown non-woven material. Although this product can introduce wormwood particles into melt-blown non-woven material to become a mask material, air filter material or sanitary material, it has the following defects: Firstly, the design adds wormwood particles to the non-woven material, which is a kind of wormwood semi-finished product, and it is difficult to ensure the quality of the effective components of wormwood inside, which may affect the final wormwood adding effect; Secondly, the combination mode of wormwood and non-woven material in the design is wormwood particles and polymer melt granulation, which belongs to a physical mechanical mixing, and is not a true combination of wormwood active ingredients and non-woven material, and the combination effect is weak.

[0006] The information disclosed in this Background section is only for the purpose of increasing the understanding of the general background of the application and should not be taken as an acknowledgement or any form of suggestion that this information forms prior art with regard to the natural technical level of one skilled in the art. SUMMARY

[0007] The purpose of the present application is to overcome the defects and problems of poor wormwood addition effect and weak combination effect in the prior art, and to provide a cotton water-jet non-woven fabric production method for supercritical finishing of wormwood.

[0008] To achieve the above purpose, the technical solution of the present application is: a cotton water-jet non-woven fabric production method for supercritical finishing of wormwood; the production method comprises the following steps: First step: first extract the air-dried wormwood powder with supercritical CO2 fluid, dissolve the wormwood extract obtained in the extraction in the supercritical fluid, and then gasify the supercritical fluid after the extraction is completed, to obtain the wormwood extract; Second step: first mix the above wormwood extract with finishing agent, supercritical fluid and cotton water-jet fabric to mix and finish the cotton water-jet fabric, and then gasify the supercritical fluid after the mixing and finishing is completed; the finishing agent comprises water, cationic modifier and active group; Third step: after the above pressure relief and supercritical fluid gasification is completed, take out the finished cotton water-jet fabric to obtain the cotton water-jet non-woven fabric for supercritical finishing of wormwood.

[0009] In the first step, the control parameters of the supercritical fluid are: temperature 60-80℃, pressure 20-25Mpa; In the second step, the control parameters of the supercritical fluid are: temperature 40-60℃, pressure 15-20Mpa.

[0010] In the first step, the amount of the wormwood powder is 50-150g / L, wherein L represents the volume of the space for the extraction reaction is 1L; the reaction time of the extraction is 1-2h.

[0011] In the second step, the cotton water-jet fabric is a cotton water-jet fabric after bleaching and degumming.

[0012] The water, cationic modifier and active group in the finishing agent are respectively 5-10% of the volume of the space where the mixed finishing reaction is located, 0.2-0.5 mol / L and 5-10 g / L, wherein L represents the volume of the space where the mixed finishing reaction is located is 1 L.

[0013] The cationic modifier in the second step is any one or any mixture of durable press resin CTA-705, high molecular polymer containing cationic groups, chitosan and its derivatives, protein and its hydrolyzed derivatives.

[0014] The active group in the second step is any one of dichlorotriazine, monochlorotriazine, methoxy-monochlorotriazine, nicotinic acid-monochlorotriazine, monofluorotriazine, trichloropyrimidine, methyl sulfone dichloropyrimidine, fluorochloropyrimidine, quinoxaline type, sulfate ethyl sulfone, ethylene sulfone, chloroethyl sulfone, bromoacrylamide, phosphate group, ethylene / ethyl sulfate / chloroethyl amide.

[0015] The finishing agent in the second step further comprises a fiber enzyme, and the amount of the fiber enzyme is 0.1-0.5 g / L.

[0016] The first step, the second step and the third step are specifically as follows: The first step: first, the dried mugwort is crushed into mugwort powder, then the mugwort powder is put into the reaction kettle of the supercritical CO2 fluid device, then the cover of the reaction kettle is covered, then the front-end pipeline of the fluid device and the reaction kettle are connected to introduce the supercritical fluid into the reaction kettle until the reaction kettle is filled, then the front-end pipeline and the reaction kettle are disconnected, then the mugwort powder is extracted by the supercritical fluid, the mugwort extract obtained in the extraction is dissolved in the supercritical fluid, after the extraction is completed, the reaction kettle and the separation kettle are connected to make the supercritical fluid and the mugwort extract dissolved therein flow into the separation kettle together, then the supercritical fluid flowing into the separation kettle is gasified, the mugwort extract is separated in the separation kettle, until all the supercritical fluid is gasified, then the reaction kettle and the separation kettle are disconnected. The second step: first, the cover of the reaction kettle is opened, and the remaining mugwort powder is taken out, then the cotton hydroentangled fabric and the finishing agent are put into the reaction kettle, then the finishing process is carried out, which includes at least one mixed finishing step, the mixed finishing step includes: first, the covers of the reaction kettle and the separation kettle are covered, then the front-end pipeline, the reaction kettle and the separation kettle are connected in sequence to introduce the supercritical fluid into the reaction kettle and the separation kettle in sequence until the reaction kettle and the separation kettle are filled, then the front-end pipeline and the reaction kettle are disconnected, then the cotton hydroentangled fabric is mixed and finished by the supercritical fluid, the finishing agent and the mugwort extract, after the mixed finishing is completed, the cover of the separation kettle is opened until all the supercritical fluid is gasified. The finishing agent comprises water, cationic modifier and active group. Third step: after the above finishing process is finished, the lid of the reaction kettle is opened first, and then the finished cotton spunlace cloth is taken out to obtain the supercritical finished artemisia vagans cotton spunlace non-woven fabric.

[0017] In the second step, the number of mixing finishing steps is 3-5 times, and all the mixing finishing steps are sequentially cycled.

[0018] Compared with the prior art, the beneficial effects of the present application are: 1、In the production method of the supercritical finished artemisia vagans cotton spunlace non-woven fabric, the supercritical CO2 fluid is used to extract the air-dried artemisia vagans powder to obtain artemisia vagans extract, and then the artemisia vagans extract, finishing agent (including water, cationic modifier and active group) and cotton spunlace cloth are mixed in the supercritical fluid to finish the cotton spunlace cloth. After the mixing finishing is finished, the supercritical fluid is released and gasified to obtain the final product, the supercritical finished artemisia vagans cotton spunlace non-woven fabric. The advantages of the design include: Firstly, the hydroxyl group on the cotton fiber in the cotton spunlace cloth has a high negative charge density on the fiber surface, and the cationic modifier can react with the hydroxyl group to reduce the negative charge density on the surface of the cotton fabric, so that the artemisia vagans extract (i.e. artemisia vagans effective component) can approach the cotton fiber to combine with the cotton fiber. At the same time, the amino group in the artemisia vagans extract is first substituted with the active group to obtain active artemisia vagans component, and then the active artemisia vagans component reacts with the remaining hydroxyl group on the cotton fiber to form a covalent bond, so that the artemisia vagans effective component and the cotton spunlace cloth are tightly combined, and the fastness is strong, so that the final cotton fabric has good washing resistance. Secondly, the artemisia vagans extract used in the present application is directly extracted by the supercritical fluid, and the reaction in the subsequent mixing finishing is also carried out in the supercritical fluid. This design not only ensures the quality of the artemisia vagans extract and ensures that it is a true effective component, but also ensures the sufficient dissolution of the artemisia vagans extract in the mixing finishing (the main body environment is the supercritical fluid), which improves the mixing finishing effect.

[0019] Therefore, the present application not only has good artemisia vagans extraction effect and good artemisia vagans addition effect, but also has strong combination effect and good washing resistance.

[0020] 2、In the production method of the supercritical finished artemisia vagans cotton spunlace non-woven fabric, the supercritical fluid is used as the main body environment for the reaction in the artemisia vagans extraction and the mixing finishing process. The advantages of the design include: The first point: the supercritical carbon dioxide fluid has the characteristics of high solubility, high density, high diffusivity, etc.; in the supercritical state, the solubility of carbon dioxide is greatly increased, and the organic matter (the effective components of wormwood mainly include terpenes, monoterpenes and derivatives, sesquiterpenes and derivatives, ketones / aldehydes, alcohols / phenols, acids / esters, alkane / alkene, etc., which can be effectively dissolved in the supercritical fluid to realize good mutual solubility) can be effectively dissolved and extracted; therefore, when the wormwood is extracted by the supercritical carbon dioxide, by controlling the temperature and pressure, a large density difference between the separated substances and the supercritical carbon dioxide fluid can be formed, so that separation and high-quality extraction can be realized, and high-quality wormwood extract can be obtained. The second point: the supercritical fluid can greatly avoid the oxidation and degradation of the effective components of wormwood during the extraction of wormwood due to the antioxidant property of carbon dioxide, so that the purity of the product is higher, and the effect is better. The third point: the high diffusivity of the supercritical fluid not only facilitates the complete reaction of the cationic modifier and the cotton spunlace fabric and the active group and the effective components of wormwood, but also enables the supercritical fluid to rapidly penetrate into the inside of the cotton spunlace fabric to fully contact the effective components of wormwood or active wormwood components carried by the supercritical fluid with the cotton fibers, so as to facilitate the full reaction of the mixing finishing and improve the combination effect of the effective components of wormwood and the cotton fabric. The fourth point: the supercritical fluid is used as the main environment of the extraction reaction and the mixing finishing reaction, so that waterless treatment is realized, which not only saves water resources, but also avoids the generation of sewage.

[0021] Therefore, the extraction and mixing finishing have good effects, the addition effect of wormwood and the combination effect of wormwood and cotton fibers are improved, and the generation of sewage is avoided, so that the environmental protection property is high.

[0022] 3. In the production method of the cotton spunlace nonwoven fabric of the application, the extraction reaction and the mixing finishing reaction are preferably placed in the supercritical CO2 fluid device, such as a reaction kettle and a separation kettle, so that the extraction process and the mixing finishing process can be integrated, the reaction process is shortened, the operation difficulty is reduced, the operation time is saved, all operations can be realized on the same machine, and the reaction cost is saved. Therefore, the operation time is short, and the reaction cost is low.

[0023] 4. In the production method of the cotton spunlace nonwoven fabric of the application, the finishing agent preferably further comprises a fiber enzyme, and the amount of the fiber enzyme is preferably 0.1-0.5 g / L. The advantages of the design include: The first point: the fiber enzyme can improve the affinity between the cotton fabric and the effective components of wormwood, so as to improve the combination effect of wormwood and cotton spunlace fabric. Secondly, the cotton fiber itself has many tiny hairs, and the cellulase has the effect of reducing the amount of finishing, which can reduce the hairs, make the surface of the cotton fiber smooth, and the form is finer, which can not only provide soft hand feeling, but also make the macrostructure of the cotton spunlace fabric more loose, increase the air permeability of the cotton spunlace fabric, and be beneficial to the application in sanitary products and medical products; Therefore, the application not only has the strong combination effect of wormwood and cotton fiber, but also is beneficial to improving the hand feeling and air permeability of the cotton fabric. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is a combination diagram of the active wormwood component and the cotton fiber in the application.

[0025] Figure 2 is a molecular formula of a type of active group in the application.

[0026] Figure 3 is a molecular formula of another type of active group in the application.

[0027] Figure 4 is a schematic diagram of the original form of the cotton fiber involved in the application.

[0028] Figure 5 is a schematic diagram of the form of the cotton fiber treated by cellulase involved in the application. DETAILED DESCRIPTION

[0029] The application is further described in detail in combination with the description of the drawings and the specific implementation.

[0030] Referring to Figure 1 — Figure 5 A production method of supercritical finishing wormwood cotton spunlace nonwoven fabric; the production method comprises the following steps: First step: the dried wormwood powder is extracted by supercritical CO2 fluid, the wormwood extract obtained in the extraction is dissolved in the supercritical fluid, and after the extraction is completed, the supercritical fluid is gasified to obtain the wormwood extract; Second step: the wormwood extract, finishing agent, supercritical fluid and cotton spunlace fabric are mixed together to finish the cotton spunlace fabric, and then the supercritical fluid is gasified after pressure relief; the finishing agent comprises water, cationic modifier and active group; Third step: after the pressure relief and gasification of the supercritical fluid are completed, the finished cotton spunlace fabric is taken out to obtain the supercritical finishing wormwood cotton spunlace nonwoven fabric.

[0031] In the first step, the control parameters of the supercritical fluid are: temperature 60-80 DEG C, pressure 20-25 Mpa; The control parameter of the supercritical fluid in the second step is: temperature 40-60℃, pressure 15-20Mpa.

[0032] In the first step, the dosage of the wormwood powder is 50-150g / L, wherein L refers to the volume of the space where the extraction reaction is carried out as 1L; the reaction time of the extraction is 1-2h.

[0033] In the second step, the cotton hydro-entangled fabric is the cotton hydro-entangled fabric after being desized and bleached.

[0034] In the second step, the dosages of water, cationic modifier and active group in the finishing agent are respectively: 5%-10% of the volume of the space where the mixing finishing reaction is carried out, 0.2-0.5mol / L, 5-10g / L, wherein L refers to the volume of the space where the mixing finishing reaction is carried out as 1L.

[0035] In the second step, the cationic modifier refers to any one or any mixture of durable press resin CTA-705, high molecular polymer containing cationic group, chitosan and its derivatives, protein and its hydrolyzed derivatives.

[0036] In the second step, the active group refers to any one of dichlorotriazine, monochlorotriazine, methoxy-monochlorotriazine, nicotinic acid-monochlorotriazine, monofluorotriazine, trichloropyrimidine, methylsulfonyl dichloropyrimidine, fluorochloropyrimidine, quinoxaline type, sulfate ethyl sulfone, ethylene sulfone, chloroethyl sulfone, bromoacrylamide, phosphate group, ethylene / ethyl sulfate / chloroethyl amide.

[0037] In the second step, the finishing agent further comprises a fibrozyme, and the dosage of the fibrozyme is 0.1-0.5g / L.

[0038] The first step, the second step and the third step are as follows: The first step: the dried wormwood is first crushed into wormwood powder, then the wormwood powder is put into the reaction kettle of the supercritical CO2 fluid device, then the cover of the reaction kettle is covered, then the front end pipeline of the fluid device and the reaction kettle are connected to introduce the supercritical fluid into the reaction kettle until the reaction kettle is filled, then the front end pipeline and the reaction kettle are disconnected, then the wormwood powder is extracted by the supercritical fluid, the wormwood extract obtained in the extraction is dissolved in the supercritical fluid, after the extraction is finished, the reaction kettle and the separation kettle are connected to make the supercritical fluid and the dissolved wormwood extract flow into the separation kettle together, then the supercritical fluid flowing into the separation kettle is gasified, the wormwood extract is separated in the separation kettle, until all the supercritical fluid is gasified, then the reaction kettle and the separation kettle are disconnected. Second step: first open the lid of the reactor, take out the remaining artemisia powder, and then put the cotton spunlace fabric and finishing agent into the reactor, and then perform the finishing process, which includes at least one mixing finishing step, which includes: first cover the lid of the reactor and separation kettle, then sequentially connect the front end pipeline, reactor and separation kettle to sequentially introduce supercritical fluid into the reactor and separation kettle until the reactor and separation kettle are filled, then disconnect the front end pipeline and reactor, and then mix the cotton spunlace fabric with the supercritical fluid, finishing agent and artemisia extract, after the mixing finishing is completed, open the lid of the separation kettle until all the supercritical fluid is gasified. The finishing agent includes water, cationic modifier and active group. Third step: after the above finishing process is completed, first open the lid of the reactor, and then take out the finished cotton spunlace fabric to obtain the supercritical finishing artemisia cotton spunlace non-woven fabric.

[0039] In the second step, the number of mixing finishing steps is 3-5, and all the mixing finishing steps are sequentially cycled.

[0040] The supplementary technical features of the application are as follows: In the application, the finishing agent is limited to include water, cationic modifier and active group because the monomer of cotton fiber is D-glucose, which contains a large number of hydroxyl groups, resulting in a high negative charge density on the surface of cotton fiber, which is not conducive to the entry of negatively charged artemisia effective components to achieve mutual combination, so it is necessary to minimize the repulsive force.

[0041] Therefore, the application introduces a cationic modifier to weaken the negative charge density on the surface of cotton fabric and improve the adsorbability of artemisia effective components, such as natural macromolecular modifiers containing electron-donating groups, such as durable press resin CTA-705 and chitosan, which have the advantages of good biocompatibility, non-toxicity and non-antigenicity.

[0042] After the treatment of the cationic modifier, the high negative charge density of the cotton fiber is reduced, and the negatively charged artemisia effective components no longer repel the entry (such as after the introduction of C=O group, the negative charge density on the surface of the cotton fiber is reduced, and the repulsion of the artemisia extract is reduced), but the entry does not mean that the combination firmness is strong, therefore, the application also introduces an active group to treat the artemisia effective components to obtain active artemisia components, and then combines them with the remaining hydroxyl groups on the cotton fiber, uses the action of covalent bond, and makes the artemisia components combine more tightly on the cotton fabric, which has durability and water resistance.

[0043] For example, see Figure 1 : The amino reactive group in the wormwood component is first substituted with one chlorine atom on the active group (dichloro-s-triazine) to obtain an active wormwood component (monochloro-s-triazine active wormwood component), and then the remaining chlorine atom on the active group (triazine ring) is reacted with the hydroxyl group on the cotton fiber to tightly bind the wormwood component on the cotton fabric by the action of covalent bond.

[0044] The supercritical fluid in the application refers to supercritical carbon dioxide fluid.

[0045] In the supercritical CO2 fluid device in the application, one end of the front-end pipeline is connected with a CO2 gas source outside the device, and the other end of the front-end pipeline is connected with a reaction kettle and a separation kettle, and the reaction kettle and the separation kettle are both provided with lids for sealing. In application, first, the gas source and the front-end pipeline are connected, and then the temperature and the pressure are set, and then when the temperature and the pressure reach the set values, the gaseous carbon dioxide in the front-end pipeline has become supercritical CO2 fluid, and then the gas inlet valve of the reaction kettle is opened to make the supercritical fluid enter the reaction kettle, and at the same time, gaseous carbon dioxide continuously enters the front-end pipeline and continuously converts into supercritical fluid to continuously enter the reaction kettle.

[0046] The high-molecular polymer containing a cationic group in the application is preferably poly(4-vinylpyridine) quaternary ammonium salt, polyethyleneimine or polyamine dendrimer.

[0047] The hydrolytic derivative of the protein in the application is preferably an amino acid.

[0048] Example 1: See Figure 1 — Figure 5 A production method of supercritical wormwood finished cotton hydroentangled nonwoven fabric, comprising the following steps: First step: supercritical CO2 fluid is used to extract the dried wormwood powder, and the wormwood extract obtained in the extraction is dissolved in the supercritical fluid (preferably, the control parameters of the supercritical fluid are: temperature 60-80 DEG C, pressure 20-25 Mpa), and after the extraction is completed, the supercritical fluid is gasified to obtain the wormwood extract; Second step: the wormwood extract, finishing agent, supercritical fluid (preferably, the control parameters of the supercritical fluid are: temperature 40-60 DEG C, pressure 15-20 Mpa) and cotton hydroentangled fabric are mixed together to finish the cotton hydroentangled fabric, and then the supercritical fluid is released and gasified after the finishing is completed; the finishing agent comprises water, cationic modifier and active group; Third step: after the release and gasification of the supercritical fluid are completed, the finished cotton hydroentangled fabric is taken out to obtain the supercritical wormwood finished cotton hydroentangled nonwoven fabric.

[0049] The higher temperature in the extraction reaction is to better extract the effective components of the wormwood from the plant cells, and in the mixing finishing step, the superfluid mainly loads the effective components of the wormwood for mixing finishing, so that a higher temperature is not needed, and a relatively low temperature is adopted to save energy.

[0050] Example 2: The basic content is the same as that in Example 1, except that: The wormwood powder is used in an amount of 50-150 g / L, wherein L refers to the volume of the space where the extraction reaction is located is 1 L; the reaction time of the extraction is 1-2 h.

[0051] The amount of the wormwood in this range can better meet the concentration requirement of the subsequent mixing finishing, if the amount is lower than this range, the finishing effect is poor, if the amount is higher than this range, better effect cannot be achieved, and raw materials are wasted.

[0052] In addition, if the extraction reaction is carried out in the reaction kettle in the superfluid device, the space where the extraction reaction is located is the volume of the reaction kettle.

[0053] Example 3: The basic content is the same as that in Example 1, except that: The reason why the cotton spunlace fabric after bleaching and decontamination is preferred is that the cotton spunlace fabric product containing the effective components of the wormwood is obtained, and the application basis of the cotton spunlace fabric product is that it must have good moisture absorption performance, which can be obtained only by bleaching and decontamination. If it is not bleached and decontaminated, even if the wormwood components are finished, the basic water absorption performance cannot be guaranteed, which hinders the final application of the product.

[0054] In addition, if the cotton spunlace fabric is not bleached and decontaminated, it will contain more pectin and cotton wax, which will hinder the contact between the effective components of the wormwood and the cotton fibers in the later period.

[0055] Example 4: The basic content is the same as that in Example 1, except that: In the second step, the amounts of water, cationic modifier and active group in the finishing agent are respectively: 5%-10% of the volume of the space where the mixing finishing reaction is located, 0.2-0.5 mol / L, and 5-10 g / L, wherein L refers to the volume of the space where the mixing finishing reaction is located is 1 L.

[0056] If the above mixing finishing reaction is carried out in the reaction kettle, the space where the mixing finishing reaction is located is the reaction kettle.

[0057] Example 5: The basic content is the same as that in Example 1, except that: The second step, the active group refers to the nucleophilic substitution reaction type or nucleophilic addition reaction type; The nucleophilic substitution reaction type refers to any one of dichlorotriazine, monochlorotriazine, methoxy monochlorotriazine, nicotinic acid monochlorotriazine, fluorotriazine, trichloropyrimidine, methyl sulfone dichloropyrimidine, fluorochloropyrimidine, quinoline type (see Figure 2 ); The nucleophilic addition reaction type refers to any one of sulfate ethyl sulfone, vinyl sulfone, chloroethyl sulfone, bromoacrylamide, phosphate group, ethylene / ethyl sulfate / chloroethyl amide (see Figure 3 )。

[0058] Example 6: The basic content is the same as that of example 1, except that: A supercritical finishing wormwood cotton spunlace nonwoven fabric production method, comprising the following steps: First step: first, the dried wormwood is broken into wormwood powder, then the wormwood powder is put into the reaction kettle of the supercritical CO2 fluid device, then the cover of the reaction kettle is covered, then the front end pipeline of the fluid device is connected, the reaction kettle is connected, the supercritical fluid is introduced into the reaction kettle, until the reaction kettle is filled, then the front end pipeline and the reaction kettle are disconnected, then the wormwood powder is extracted by the supercritical fluid, the wormwood extract obtained in the extraction is dissolved in the supercritical fluid, after the extraction is finished, the reaction kettle and the separation kettle are connected, so that the supercritical fluid and the dissolved wormwood extract flow into the separation kettle, then the supercritical fluid in the separation kettle is gasified, the wormwood extract is separated in the separation kettle, until all the supercritical fluid is gasified, then the reaction kettle and the separation kettle are disconnected; Second step: first, open the cover of the reaction kettle, take out the remaining wormwood powder, then put the cotton spunlace and finishing agent into the reaction kettle, then perform the finishing process, which includes at least one mixing finishing step, which includes: first, cover the covers of the reaction kettle and the separation kettle, then connect the front end pipeline, the reaction kettle and the separation kettle in turn, so that the supercritical fluid is introduced into the reaction kettle and the separation kettle in turn, until the reaction kettle and the separation kettle are filled, then disconnect the front end pipeline and the reaction kettle, then mix and finish the cotton spunlace with the supercritical fluid, the finishing agent and the wormwood extract, after the mixing and finishing is finished, open the cover of the separation kettle, until all the supercritical fluid is gasified; the finishing agent includes water, cationic modifier and active group; Third step: after the above finishing process is finished, first open the cover of the reaction kettle, then take out the finished cotton spunlace, to obtain the supercritical finishing wormwood cotton spunlace nonwoven fabric.

[0059] Preferably, in the second step, the number of mixing finishing steps is 3-5, and all the mixing finishing steps are performed in turn, and the reaction time of each mixing finishing step is 20-40 min.

[0060] Example 7: The basic content is same as that of Example 1, except that: In the second step, the finishing agent further comprises a fibrozyme, and the amount of the fibrozyme is 0.1-0.5 g / L.

[0061] See Figure 4 It can be seen that the cotton fiber itself has many tiny hairs, which will cause the cloth to have enhanced damping feeling, and the hand feeling is not smooth and soft, and the cellulase can remove the hairs.

[0062] See Figure 5 It can be seen that the cotton fiber treated by the cellulase has smooth surface and thinner fiber, so that the cotton fabric has soft hand feeling in macroscopic view.

[0063] The above only describes the preferred embodiments of the present application, and the protection scope of the present application is not limited to the above embodiments, but any equivalent modification or change made by the ordinary skilled in the art according to the disclosed content of the present application shall be included in the protection scope recorded in the claims.

Claims

1. A method for producing cotton spunlace nonwoven fabric using supercritical finishing of Artemisia argyi, characterized in that: The production method includes the following steps: Step 1: First, the air-dried mugwort powder is extracted with supercritical CO2 fluid. The extracted mugwort extract is dissolved in the supercritical fluid. After the extraction is completed, the supercritical fluid is vaporized to obtain the mugwort extract. Step 2: First, mix the above-mentioned Artemisia argyi extract with the finishing agent, supercritical fluid, and cotton spunlace fabric to perform a mixing and finishing process on the cotton spunlace fabric. After the mixing and finishing process is completed, depressurize and vaporize the supercritical fluid. The finishing agent includes water, cationic modifier, and active group. Step 3: After the above-mentioned depressurization and vaporization of supercritical fluid is completed, the treated cotton spunlace fabric is taken out to obtain the supercritical treated mugwort cotton spunlace nonwoven fabric.

2. The method for producing cotton spunlace nonwoven fabric by supercritical treatment of Artemisia argyi according to claim 1, characterized in that: In the first step, the control parameters for the supercritical fluid are: temperature 60-80℃, pressure 20-25 MPa; In the second step, the control parameters for the supercritical fluid are: temperature 40-60℃, pressure 15-20 MPa.

3. The method for producing cotton spunlace nonwoven fabric by supercritical treatment of Artemisia argyi according to claim 1, characterized in that: In the first step, the amount of Artemisia argyi powder used is 50-150 g / L, where L refers to the volume of the space where the extraction reaction takes place as 1 L; the extraction reaction time is 1-2 h.

4. The method for producing cotton spunlace nonwoven fabric by supercritical treatment of Artemisia argyi according to claim 1, characterized in that: In the second step, the cotton spunlace fabric is the debleached cotton spunlace fabric.

5. The method for producing cotton spunlace nonwoven fabric by supercritical treatment of Artemisia argyi according to claim 1, characterized in that: In the second step, the amounts of water, cationic modifier, and active group in the finishing agent are respectively: 5%-10% of the volume of the space where the finishing reaction is located, 0.2-0.5 mol / L, and 5-10 g / L, where L refers to the volume of the space where the finishing reaction is located as 1 L.

6. The method for producing cotton spunlace nonwoven fabric by supercritical treatment of Artemisia argyi according to claim 1, characterized in that: In the second step, the cationic modifier refers to any one or any mixture of durable press resin CTA-705, high molecular weight polymers containing cationic groups, chitosan and its derivatives, and proteins and their hydrolyzed derivatives.

7. The method for producing cotton spunlace nonwoven fabric by supercritical treatment of Artemisia argyi according to claim 1, characterized in that: In the second step, the active group refers to any one of dichlorotriazine, monochlorotriazine, methoxy-monochlorotriazine, nicotinic acid-monochlorotriazine, monofluorotriazine, trichloropyrimidine, methyl sulfone dichloropyrimidine, fluorochloropyrimidine, quinoxaline type, ethyl sulfone sulfate, vinyl sulfone, chloroethyl sulfone, bromoacrylamide, phosphate ester group, and ethylene / ethyl sulfate / chloroethyl amide.

8. The method for producing cotton spunlace nonwoven fabric by supercritical treatment of Artemisia argyi according to claim 1, characterized in that: In the second step, the finishing agent also includes cellulase, and the amount of cellulase used is 0.1-0.5 g / L.

9. The method for producing cotton spunlace nonwoven fabric by supercritical treatment of Artemisia argyi according to claim 1, characterized in that: The first, second, and third steps are as follows: Step 1: First, crush the dried mugwort into mugwort powder, then put the mugwort powder into the reactor of the supercritical CO2 fluid device, then cover the reactor, and then connect the front end pipe of the fluid device to the reactor to introduce supercritical fluid into the reactor until it is full. Then disconnect the front end pipe and the reactor, and then extract the mugwort powder with the supercritical fluid. The mugwort extract obtained by extraction dissolves in the supercritical fluid. After extraction, connect the reactor and the separation vessel so that the supercritical fluid and the dissolved mugwort extract flow into the separation vessel together. Then, the supercritical fluid flowing into the separation vessel is vaporized, and the mugwort extract is separated in the separation vessel. Continue until all the supercritical fluid is vaporized, and then disconnect the reactor and the separation vessel. Step 2: First, open the lid of the reactor and remove the remaining Artemisia argyi powder. Then, put cotton spunlace fabric and finishing agent into the reactor and proceed with the finishing process. This finishing process includes at least one mixing and finishing step, which includes: first, covering the lids of the reactor and the separation vessel, then sequentially connecting the front-end pipe, the reactor, and the separation vessel to sequentially introduce supercritical fluid into the reactor and the separation vessel until they are full. Then, disconnect the front-end pipe and the reactor, and then mix and finish the cotton spunlace fabric with the supercritical fluid, finishing agent, and Artemisia argyi extract. After the mixing and finishing is completed, open the lid of the separation vessel until all the supercritical fluid is vaporized. The finishing agent includes water, a cationic modifier, and an active group; Step 3: After the above finishing process is completed, first open the lid of the reactor, then take out the finished cotton spunlace nonwoven fabric to obtain the supercritical finished Artemisia argyi cotton spunlace nonwoven fabric.

10. The method for producing cotton spunlace nonwoven fabric by supercritical treatment of Artemisia argyi according to claim 9, characterized in that: In the second step, the mixing and sorting steps are performed 3 to 5 times, and all the mixing and sorting steps are performed in a sequential cycle.

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