Preparation method of down-proof fabric

Abstract

The invention discloses a preparation method of a down-proof fabric. The preparation method comprises the following steps: pretreatment of base cloth: coating the front surface of the base cloth with foaming printing paste and drying; blowing and spraying a nanofiber membrane: spinning out nanofibers by a row blowing nozzle, separating out a solvent in a water bath, and solidifying to form a net to obtain the nanofiber membrane; and compounding the nanofiber membrane on the back surface of the base cloth. According to the preparation method of the composite bubble wrinkled down-proof fabric, a wrinkled effect is formed on the surface of the base cloth by utilizing a traditional three-dimensional foaming process, down fibers are reduced from the aspect of penetration from the cloth cover in cooperation with the microstructure of the nanofiber membrane, and the air permeability of the fabric is improved through porous channels while the down-proof effect is achieved.

Description

[0001] This application is a divisional application of the invention patent application with the application number 2022114237286, the application date of November 14, 2022, and the invention name of "a composite bubble-crease anti-piercing down fabric and its preparation method". TECHNICAL FIELD

[0002] The present application relates to the technical field of composite bubble-crease anti-piercing down fabric, in particular to a preparation method of a composite bubble-crease anti-piercing down fabric. BACKGROUND

[0003] Down fiber is one of the most warm and soft materials in the current textile market, its structure is a three-dimensional spherical shape composed of a central down cluster and radial down filaments around it, the hollow structure in a single down filament and the still air contained between multiple down filaments are the reasons why down has excellent warmth retention, but down fiber is small in fineness (5-14 μm) and light, and it is easy to fly out from the seam of the fabric or the gap between the warp and weft during the use of the product due to friction or beating, so it is necessary to treat the down product with anti-piercing down.

[0004] Generally speaking, down fiber is mostly filled in nylon fabric with good wear resistance to enhance the service life of down products, in order to reduce the phenomenon of piercing down, people often increase the warp and weft density of the fabric or directly coat to reduce the gap in the outer fabric, but this way often sacrifices the air permeability and skin-friendliness of the textile, and also increases the thickness of the fabric.

[0005] At present, the hot-selling of light down products inspires people's research on the comfort of anti-drilling fabric. For example, patent CN201810246742.0 proposes a method of filling fiber pores by weft stretching and bending and calendering flat wool to prepare light down fabric. Although this method does not use the traditional coating process and relies on a single layer of fabric, the stretched weft is easy to loosen, and the flattened down will gradually stretch out of the structure after a long time of use, making it difficult to ensure long-term use of the product. For example, patent CN201710209520.7 interweaves polylactic acid fiber and Tencel in a satin weave, with Tencel on the outside of the fabric and polylactic acid on the inside of the fabric, and hot-presses a thin film to prevent down drilling. This method is indeed beneficial to the preparation of light down fabric, but it needs to be improved in terms of air permeability and flexibility. Patent CN202010492283.1 uses multiple finishing agents (including anti-drilling agents) to wash and dry the fabric multiple times, but the interstitial microstructure of the fabric is easily filled with active substances in the finishing process, and the patent does not further explain the reason why the air permeability is not affected. There are also patents that design the microstructure of the fabric, such as patent CN202210747116.6, which designs a down jacket with a double-layer down-locking structure. The application of multiple levels and microstructures enables the fabric to achieve down-locking and air permeability without the need for coating and agent treatment, but this method is not suitable for the design of light down products. Patent CN202210619637.3 further uses a super-thin and super-transparent microporous membrane to coat the base fabric with high precision. This method uses the size of the membrane pores of the microporous membrane to limit the drilling of down, but this method involves the coating of the membrane on the base fabric. If the membrane surface is tightly combined with the base fabric surface, the fabric strength is poor, but the anti-drilling effect is good. If the microporous membrane is tightly coated with the yarn inside the base fabric, the anti-drilling effect is poor due to the small pore size. Patent CN113997660A proposes a method for preparing a functional nanofiber conformable fabric, which uses a nanofiber structure with a high specific surface area to finish the functional fabric with certain comfort performance. In order to integrate multiple functions at once, the nanofibers obtained by electrospinning are cut and mixed before being sprayed onto the fabric. The difference between this method and the conventional coating process is that the former uses shorter nanofibers as the carrier, while the latter uses particulate matter. However, it ignores the stability of the functional substances loaded on the entangled fiber structure. SUMMARY

[0006] Therefore, in order to overcome the defects of the prior art, the purpose of the present application is to provide a preparation method of a composite bubble-crease anti-drilling fabric.

[0007] In order to achieve the above-mentioned purpose, the technical scheme adopted by the present application is as follows:

[0008] A preparation method of a composite bubble-crease anti-drilling fabric, comprising the following steps:

[0009] The base fabric coated with the foaming printing paste on the front side and dried is compounded with the nanofiber membrane; the nanofiber membrane is compounded on the back side of the base fabric;

[0010] The compounding comprises pre-adhesion and post-adhesion; the pre-adhesion is to adsorb the nanofiber membrane to the back side of the base fabric; the post-adhesion is to adhere the nanofiber membrane to the back side of the base fabric under the conditions of heating and pressing by using a pressure roller and a heating roller.

[0011] According to some preferred embodiments of the present application, the deformation degree of the base fabric coated with the foaming printing paste on the front side and dried (the base fabric after foaming) is less than the deformation degree that the blown nanofiber membrane can withstand, so that the blown nanofiber membrane is prevented from being broken internally due to excessive deformation.

[0012] In some embodiments, preferably, the elastic elongation of the base fabric coated with the foaming printing paste on the front side and dried is 10-30%, the elastic elongation of the nanofiber membrane is 20-40%, and the elastic elongation of the prepared composite bubble-crease-proof anti-pile fabric is 10-20%.

[0013] According to some preferred embodiments of the present application, the pore size of the nanofiber membrane is 400-700 nm, and the porosity is 85-93%.

[0014] According to some preferred embodiments of the present application, the nanofiber membrane is prepared by a blowing method: nanofibers are spun from a row of blowing nozzles, and the solvent is precipitated and solidified into a web in a water bath to obtain the nanofiber membrane; the air pressure during blowing spinning is 0.08-0.12 MPa. The water bath generally refers to that the coagulation bath in the water bath receiving pool is one or more of water, ethanol and methanol.

[0015] According to some preferred embodiments of the present application, the material of the nanofiber is polyurethane (PU), the diameter of the nanofiber is 250-500 nm, and the average axial length of a single nanofiber obtained by blowing is 30-100 mm. The working number of the row of blowing nozzles is determined according to the width of the base fabric, one working nozzle is added every 20-30 cm (preferably 25 cm), the distance from the water bath receiving pool surface is 25-50 cm, and the thickness of the obtained nanofiber membrane is 0.3-1.2 μm.

[0016] According to some preferred embodiments of the present application, the pre-adhesion is to arrange an adsorption roller on the front side of the base fabric, the surface of the adsorption roller is distributed with adsorption holes, the diameter of the adsorption holes is 3-6 mm, and the negative air pressure in the adsorption roller is -0.4 to -0.15 MPa. The blown nanofiber membrane combined with functional particles is adsorbed to the back side of the base fabric.

[0017] According to some preferred embodiments of the present application, the surface of the heating roller is smooth, the mesh number is 700-1200 mesh, and the heating temperature is 140-160℃; the pressure between the heating roller and the pressure roller during the compounding is 0.1-0.3MPa. The pressure roller is a calender roller, and the contact surface of the calender roller with the fabric is treated with Teflon anti-sticking agent to avoid the blowing nanofiber membrane from being bonded to the calender roller when heated.

[0018] The inner suction device of the suction roller and the heating roller can preliminarily draw and high-temperature dry the organic solvent and the coagulation bath carried in the nanofiber, which is beneficial to improve the air condition in the production environment and promote the industrial application of the preparation method of the present application.

[0019] According to some preferred embodiments of the present application, the base cloth is a nylon fabric with a yarn density of 330-900T.

[0020] According to some preferred embodiments of the present application, the foaming printing paste comprises the following components by weight: adhesive 40-45%, filler 15-20%, plasticizer 35-38%, stabilizer 2-2.2%, foaming agent 2-2.5%, and adjusting agent 0.5-2%. The drying temperature of the base cloth coated with the foaming printing paste on the front side is 70-80℃.

[0021] According to some preferred embodiments of the present application, the functional particles are arranged on one side of the nanofiber membrane adhered to the base cloth, the functional particles are sprayed onto the surface of the nanofiber membrane by an electrostatic spray gun, and the particle size of the functional particles is 0.8-5μm.

[0022] According to some preferred embodiments of the present application, the number of the electrostatic spray guns in the row is consistent with the number of the working spinning air blowing nozzles, the voltage applied by a single nozzle is 10-12kV, and the flow rate is 0.2-5mL / min.

[0023] According to some preferred embodiments of the present application, the functional particles are one or more of a thermal adhesive, a far-infrared finishing agent, an antibacterial finishing agent, and an ultraviolet-resistant finishing agent, the finishing agent is ultrasonically treated in dimethylformamide (DMF) to prepare a dispersion liquid, and the dispersion liquid is used for electrostatic spraying with a concentration of 7-15%.

[0024] The present application also provides a composite bubble-crepe anti-pilling fabric prepared by the preparation method as described above. The fabric has a double-layer structure, comprising a bubble-crepe base cloth, a blown nanofiber membrane, and preferably functional nanoparticles uniformly distributed between the bubble-crepe base cloth and the blown nanofiber membrane.

[0025] The basic principle of the present application is as follows: the present application uses nanofibers of small scale as a structural layer for finishing of anti-drilling down feather fabric. Since the diameter and pores of the nanofiber membrane are much smaller than the size of the down feather fiber, a multi-layer structure is not needed, and the composite of a single layer of membrane and the polyamide base cloth can prevent the down feather from drilling out without affecting the air permeability and comfort of the fabric. The bubble-crease structure on the surface of the fabric not only gives the product a three-dimensional hand feeling and unique lines, but also improves the air permeability. The elastic nanofiber membrane that is compounded can expand and deform together with the foaming of the base cloth, and the final product has a certain stretchability in the fabric structure, rather than an increase in the space between the fibers, thereby achieving the effect of preventing the down feather from drilling out. In addition, during the blowing and spraying of the nanofiber membrane, in addition to the part that does not solidify in time having a certain viscosity and being able to adhere to the back of the base cloth under negative pressure, it is further softened and bonded under the action of the heating roller, and a certain proportion of functional particles can be stably contained between the double-layer fabric, thereby widening the functional application of the down feather product.

[0026] Due to the adoption of the above technical solutions, compared with the prior art, the present application has the advantages that: the preparation method of the composite bubble-crease anti-drilling down feather fabric of the present application uses the traditional three-dimensional foaming process to form a crease effect on the surface of the base cloth, and cooperates with the microstructure of the nanofiber membrane to reduce the drilling of the down feather from the cloth surface in terms of scale, thereby achieving the effect of preventing the down feather from drilling out, and the porous channel improves the air permeability of the fabric. In addition, the elastic nanofiber membrane combined with the crease deformation of the base cloth not only improves the appearance, but also makes the fabric have a certain stretchability, thereby enhancing the wearing comfort of the down feather product. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the following embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0028] Figure 1 The preparation flow chart of the composite bubble-crease anti-drilling down feather fabric in the preferred embodiment of the present application is shown in the figure.

[0029] Figure 2 The structure schematic diagram of the composite bubble-crease anti-drilling down feather fabric in the preferred embodiment of the present application is shown in the figure, wherein, Figure 2 The left is a schematic diagram of the product in layers, and the middle contains functional particles. Figure 2 The right is a schematic diagram of the surface protrusion after foaming.

[0030] In the drawings, 1, base cloth roller; 2-1, adsorption roller; 2-2, inner suction device; 3-1, blowing nozzle; 3-2, electrostatic spray gun; 3-3, water bath receiving pool; 4, tensioning device; 5, calender roller; 6, heating roller; 7, collecting roller; a, base cloth; b, functional particles; c, nanofiber membrane. DETAILED DESCRIPTION

[0031] In order for those skilled in the art to better understand the technical solutions of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should fall within the scope of protection of the present application.

[0032] The specific conditions not specified in the embodiments are carried out according to the conventional conditions or the conditions recommended by the manufacturer. The reagents or instruments used are not specified by the manufacturer, and are all conventional products that can be purchased on the market.

[0033] Embodiment 1

[0034] As shown in the preparation method of the composite bubble-crease anti-drilling fabric in the present embodiment, the method comprises the following steps: Figure 1

[0035] Step 1, base cloth pretreatment

[0036] A commercially available nylon fabric (brand: CNT248003; Wujiang Fuhua Weaving Co., Ltd.) with a width of 1.5 m is coated with a foaming printing paste by flat screen printing and dried. The drying temperature is 70°C.

[0037] The material ratio of the foaming printing paste by weight parts is as follows: adhesive 40.5%, filler 15%, plasticizer 35%, stabilizer 2%, foaming agent 2%, and adjusting agent 0.5%.

[0038] The elastic elongation rate of the base cloth coated with the foaming printing paste and dried (foamed base cloth) is 20%.

[0039] Step 2, preparation of blown nanofiber membrane

[0040] Blown spinning solution preparation: PU masterbatch (brand: DY-602-5; Dongguan Dayue Plastic Technology Co., Ltd.) is dissolved in DMF at a ratio of 1:6, and a transparent and uniform blown spinning solution is prepared after complete dissolution at 60°C for 5 hours.

[0041] ​Preparation of nanofiber membrane: nanofibers were spun from a row of air blowing nozzles, the solvent was precipitated in a water bath and the nanofiber membrane was formed. Six working nozzles were provided during blowing, the air pressure was 0.1 MPa, the spinning distance was 30 cm, the spinning speed was 5 mL / h, and the coagulation bath was 1:3 ethanol water solution.

[0042] The diameter of the prepared nanofibers was 300 nm, and the average axial length of the single nanofiber obtained by blowing was 50 mm. The pore size of the obtained nanofiber membrane was 550 nm, the porosity was 90%; the thickness was 0.6 μm, and the elastic elongation was 30%.

[0043] Step 3, preparation of electrostatic spraying solution

[0044] The far infrared finishing agent (brand: YT-X620; Suzhou Yatu Textile Auxiliaries Co., Ltd.) was uniformly dispersed in DMF by ultrasonic for 3 hours to prepare an electrostatic spraying solution with a concentration of 1.5 wt%.

[0045] The electrostatic voltage during production was 10 kV, the distance between the end of the spray gun and the water bath receiving pool was 15 cm, the spraying speed was 3 mL / h, and the spraying particle size was 1.5 μm.

[0046] Step 4, fabric compounding

[0047] Pre-adhesion: the nanofiber membrane was adsorbed to the back of the base fabric by the adsorption roller.

[0048] After foaming printing, the base fabric a moves from the base fabric roller 1 to the surface under the adsorption roller 2-1 (hole diameter is 5 mm), and the inner suction device 2-2 in the adsorption roller 2-1 provides a pressure of -0.2 MPa. The blowing nanofiber membrane c sprayed with far infrared functional particles b that passes under the adsorption roller is adsorbed and tightly attached to the reverse side of the base fabric a.

[0049] Post-bonding: the nanofiber membrane is attached to the calendering roller 5, and the front side of the base fabric is attached to the heating roller 6. Under the conditions of heating and pressure, the nanofiber membrane is bonded to the back of the base fabric.

[0050] Subsequently, the base fabric a with the blowing nanofiber membrane c enters between the heating roller 6 and the calendering roller 5 with a surface number of 850 under the clamping of the tension device 4. The surface of the heating roller is smooth, the number is 1000, the heating temperature is 160℃, and the pressure between the heating roller and the pressure roller during compounding is 0.3 MPa. The pressure roller, i.e. the calendering roller, is treated with Teflon anti-sticking on the contact surface with the fabric to avoid the blowing nanofiber membrane from sticking to the calendering roller when heated.

[0051] After foaming and setting, the composite bubble-crease anti-pilling fabric with far infrared performance is collected by the collection roller 7, and the elastic elongation is 20%.

[0052] The inner suction device of the adsorption roller and the heating roller can preliminarily draw and high-temperature dry the organic solvent and the coagulation bath carried in the nanofiber, which is beneficial to improve the air condition in the production environment.

[0053] In this embodiment, the functional particles are anti-ultraviolet finishing agents (brand: Leoshan P, Suzhou Yatu Textile Auxiliaries Co., Ltd.).

[0054] Comparative Example 1

[0055] In this comparative example, the commercially available nylon fabric with a width of 1.5 m is not pretreated, and the final obtained composite fabric has no apparent bubbles and wrinkles.

[0056] Comparative Example 2

[0057] In this comparative example, there is no electrostatic spraying step, i.e., there are no functional particles in the fabric.

[0058] Comparative Example 3: The test object of this comparative example is the commercially available nylon fabric in Example 1.

[0059] Comparative Example 4: The specific steps of this comparative example are similar to those of Example 1, except that the functional particles in this comparative example are thermal bonding powders (brand: Parkw8e3JD, Donglai Home Decoration Building Material Specialty Store).

[0060] Example 4: Composite Bubble Wrinkle Anti-Pilling Fabric

[0061] As shown in Figure 2 , this embodiment provides a composite bubble wrinkle anti-pilling fabric prepared based on the preparation method of Example 1. It has a double-layer structure, including a bubble wrinkle base cloth, a blown nanofiber membrane, and functional nanoparticles uniformly distributed between the bubble wrinkle base cloth and the blown nanofiber membrane.

[0062] In this embodiment, the material of the nanofiber membrane is polyurethane (PU), the pore size of the membrane is 550 nm, the porosity is 90%, and the thickness is 0.6 μm. The base cloth is a nylon fabric. The functional particles of far infrared finishing agent are arranged on one side of the nanofiber membrane adhered to the base cloth, the functional particles are sprayed onto the surface of the nanofiber membrane by an electrostatic spraying gun, and the particle size of the functional particles is 1.5 μm.

[0063] The degree of deformation of the base fabric coated with the foaming printing paste on the front side and dried (foamed base fabric) is less than the degree of deformation that the blown nanofiber membrane can withstand, preventing the blown nanofiber membrane from breaking internally due to excessive deformation. In this embodiment, the elastic elongation of the base fabric coated with the foaming printing paste on the front side and dried (foamed base fabric) is 20%, the elastic elongation of the nanofiber membrane is 30%, and the elastic elongation of the composite bubble-crease-proof down-proof fabric prepared is 20%.

[0064] Test and results

[0065] The fabrics obtained in Examples 1, 2, 3 and Comparative Examples 1, 2, 3 were tested for grammage, tensile strength, air permeability, down-proofness, far infrared and ultraviolet resistance. Among them, the grammage test method refers to GB / T8628-2001; the mechanical test method refers to GB / T 3923.1-2013; the air permeability test method refers to GB / T5453-1997; the down-proofness test method refers to GB / T14272-2021; the washing method is the hotel industrial washing method; the ultraviolet resistance test method refers to GB / T18830-2009; UPF: ultraviolet protection factor; the far infrared test method refers to GB / T 30127-2013; η: far infrared emissivity (not less than 88%); ΔT: temperature rise (not less than 1.4℃). The test results are shown in Table 1:

[0066] Table 1 Test results

[0067]

[0068] From the data in Table 1, it can be seen that the composite fabric obtained in the examples has good air permeability on the basis of excellent down-proofness, and the fabric is light and thin, and the addition of functional particles has little effect on air permeability. This method can reasonably design additional functions of down products, and the addition of thermal adhesive in Comparative Example 4 increases the strength, but the gap between the fabrics is bonded due to heat melting, which has a greater effect on air permeability. In addition, the foaming printing forms a special wrinkling structure on the fabric, which has a more excellent elastic recovery capacity than the comparative example without foaming and wrinkling.

[0069] Bubble wrinkle is a special pattern that uses foaming printing process to finish fabric, so that local fibers are heated and expanded at high temperature to produce pattern wrinkles. Bubble wrinkle not only makes fabric produce three-dimensional beautiful wrinkles, but also can modify part of the fibers in the fabric. The purpose of the present application is to design a light down fabric, combine bubble wrinkle process and nanospinning technology to solve the problem that the existing technology is difficult to balance the three aspects of anti-drilling property, air permeability and comfort, lightness and durability, simple preparation process and product practicability. The traditional three-dimensional foaming process is used to form a wrinkle effect on the surface of the base cloth, and the microstructure of the nanofiber membrane is used to reduce the size of the down fibers from the cloth surface, while realizing the anti-drilling effect, the porous channel improves the air permeability of the fabric. In addition, the elastic nanofiber membrane combined with the wrinkle deformation of the base cloth not only improves the appearance, but also makes the fabric have certain tensile properties, which can enhance the wearing comfort of down products.

[0070] The composite bubble wrinkle anti-drilling fabric of the present application is composed of a nylon base cloth finished by bubble wrinkle and a blown nanofiber membrane, and contains functional particles sprayed by electrostatic spraying between the double-layer fabric. Specifically, when the base cloth a coated with foaming printing paste and dried is conveyed and moved from the base cloth roller 1 to the bottom of the adsorption roller 2, the blown nanofiber membrane c with functional nanoparticles b is adsorbed on the lower surface of the adsorption roller 2-1 due to the negative pressure generated by the internal suction device 2-2 in the adsorption roller 2-1, and is combined with the reverse side of the base cloth a, and then the fabric is tightly attached to the calender roller 5 under the tension of the tensioning device 4, and the front side is pressed by the heating roller 6. After the fabric is foamed and shaped at high temperature, it is wound on the collection roller 7; the blown nanofiber is spun from the row of air blowing nozzles 3-1, and the solvent is precipitated and solidified into a web in the water bath receiving tank 3-3, and then receives functional nanoparticles by the row of electrostatic spraying guns 3-2, and moves to the lower side of the adsorption roller 2-1 under the action of water bath, and the surface pores of the adsorption roller can preliminarily absorb the solvent in the blown nanofiber membrane under the condition of negative pressure.

[0071] The above examples are only for illustrating the technical concept and characteristics of the present application, the purpose is to enable the person skilled in the art to understand the content of the present application and to implement it, and cannot limit the protection scope of the present application. Any equivalent changes or modifications made according to the spirit and essence of the present application shall be covered within the protection scope of the present application.

Claims

1. A method for producing a pilling resistant fabric, characterized by, The method comprises the following steps: Pre-treatment of the base fabric: coating the base fabric with a foaming printing paste on the front side and drying; Blowing and spraying nanofiber membrane: nanofibers are spun by a row of blowing and spraying nozzles, and the solvent is precipitated and solidified into a network in a water bath to obtain the nanofiber membrane; The nanofiber membrane is compounded on the back side of the base fabric.

2. The production method according to claim 1, characterized by, The compounding comprises the following steps: Pre-combination: adsorbing the nanofiber membrane to the back side of the base fabric; Post-bonding: combining the nanofiber membrane with a pressure roller and the front side of the base fabric with a heating roller to bond the nanofiber membrane to the back side of the base fabric.

3. The preparation method according to claim 2, characterized in that, The pre-combination is achieved by arranging an adsorption roller on the front side of the base fabric, the surface of the adsorption roller is provided with adsorption holes, the diameter of the adsorption holes is 3-6 mm, and the negative air pressure in the adsorption roller is -0.4 to -0.15 MPa.

4. The production method according to claim 2, characterized by, The mesh number of the heating roller is 700-1200, the heating temperature is 140-160℃, the pressure between the heating roller and the pressure roller during compounding is 0.1-0.3 MPa.

5. The preparation method according to claim 2, characterized in that, The pressure roller is a calender roller, and the contact surface of the calender roller with the fabric is treated with Teflon anti-sticking agent.

6. The method of claim 1, wherein, The working number of the row of blowing and spraying nozzles during blowing and spraying of the nanofiber membrane is one working nozzle for every 20-30 cm, and the distance between the nozzle and the water bath receiving pool is 25-50 cm; the air pressure during blowing and spraying is 0.08-0.12 MPa.

7. The preparation method according to claim 1, characterized in that, The diameter of the nanofiber is 250-500 nm, and the average axial length of a single nanofiber obtained by blowing and spraying is 30-100 mm.

8. The method of claim 1, wherein, The material of the nanofiber membrane is polyurethane, and the thickness of the nanofiber membrane is 0.3-1.2 μm.

9. The method of claim 1, wherein, The pore size of the nanofiber membrane is 400-700 nm, and the porosity is 85-93%.

10. The method of claim 1, wherein, The step further comprises: spraying an electrostatic spraying solution containing functional particles to the surface of the nanofiber membrane by an electrostatic spraying gun, so that the nanofiber membrane has functional particles on one side of the base fabric, and the particle size of the functional particles is 0.8-5 μm.

11. The method of claim 10, wherein, The number of the electrostatic spraying guns is consistent with the number of the blowing and spraying nozzles for blowing and spraying of the nanofiber membrane, the voltage applied by a single nozzle of the electrostatic spraying gun is 10-12 kV, and the flow rate is 0.2-5 mL / min.

12. The method of claim 10, wherein, The electrostatic spraying solution is prepared by ultrasonicating functional particles in dimethylformamide to prepare a dispersion liquid for electrostatic spraying; the concentration of the dispersion liquid is 7-15%.

13. The method of claim 1, wherein, The foaming printing paste comprises the following components in parts by weight: adhesive 40-45%, filler 15-20%, plasticizer 35-38%, stabilizer 2-2.2%, foaming agent 2-2.5%, and adjusting agent 0.5-2%.

14. The method of claim 1, wherein, The drying temperature of the base fabric coated with the foaming printing paste is 70-80℃.

15. The method of claim 1, wherein, The base fabric is a nylon fabric with a yarn density of 330-900 T.

16. The method of any one of claims 1-15, wherein, The deformation degree of the base fabric coated with the foaming printing paste and dried is less than the deformation degree that the nanofiber membrane can withstand.

17. The method of claim 16, wherein, The elastic elongation rate of the base fabric coated with the foaming printing paste and dried is 10-30%, the elastic elongation rate of the nanofiber membrane is 20-40%, and the elastic elongation rate of the compound bubble wrinkle anti-pilling fabric is 10-20%.

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