CN108796687B - Continuous preparation device and method for self-twisting nanofiber yarn - Google Patents
Continuous preparation device and method for self-twisting nanofiber yarn Download PDFInfo
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- CN108796687B CN108796687B CN201810487059.6A CN201810487059A CN108796687B CN 108796687 B CN108796687 B CN 108796687B CN 201810487059 A CN201810487059 A CN 201810487059A CN 108796687 B CN108796687 B CN 108796687B
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H4/00—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques
- D01H4/02—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques imparting twist by a fluid, e.g. air vortex
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/0007—Electro-spinning
- D01D5/0015—Electro-spinning characterised by the initial state of the material
- D01D5/003—Electro-spinning characterised by the initial state of the material the material being a polymer solution or dispersion
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/0007—Electro-spinning
- D01D5/0061—Electro-spinning characterised by the electro-spinning apparatus
- D01D5/0069—Electro-spinning characterised by the electro-spinning apparatus characterised by the spinning section, e.g. capillary tube, protrusion or pin
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/0007—Electro-spinning
- D01D5/0061—Electro-spinning characterised by the electro-spinning apparatus
- D01D5/0092—Electro-spinning characterised by the electro-spinning apparatus characterised by the electrical field, e.g. combined with a magnetic fields, using biased or alternating fields
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/18—Formation of filaments, threads, or the like by means of rotating spinnerets
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
- D01H1/08—Spinning or twisting machines in which the product is wound-up continuously cup, pot or disc type, in which annular masses of yarn are formed by centrifugal action
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
Abstract
The invention relates to the technical field of textile processing, and aims to provide a device and a method for continuously preparing self-twisting nanofiber yarns. The method comprises the following steps: comprises a vertically installed motor, a rotating shaft at the bottom of the motor is connected with a spinning nozzle made of metal materials through a coupling; a plurality of spinneret orifices are uniformly arranged along the circumferential direction of the spinneret; the bundling system comprises a funnel-shaped bundling device, a fan and at least two air shower heads; the funnel-shaped buncher is connected to the negative electrode of the electrostatic generator through a cable; a through hole is arranged at the center of the sinking part, and the through hole, the spinneret and the motor rotating shaft are positioned on the same vertical axis; the plane where each spinneret orifice is positioned on the spinneret is arranged in parallel with the plane part of the funnel-shaped buncher; the winding and collecting system comprises a yarn guide roller and a winding roller, wherein the yarn guide roller is positioned below the through hole of the funnel-shaped buncher. According to the invention, the nano-fibers are prepared by adopting electrostatic centrifugal spinning, the production efficiency is high, and the raw materials are soluble and meltable; the nanofiber yarn integrates high orientation degree, good continuity, synchronous twisting and high-efficiency short flow into a whole.
Description
Technical Field
The invention belongs to the technical field of textile processing, and particularly relates to a device and a method for continuously preparing self-twisting nanofiber yarns by using an electrostatic centrifugal spinning technology.
Background
The nanofiber has the characteristics of surface effect, small-size effect, quantum tunneling effect, high surface activity, high porosity and the like, has excellent optical, thermal, electrical and magnetic properties, can be flexibly modified and modified functionally, and has great application potential in the fields of high-efficiency filtration, biomedical treatment, intelligent sensors and the like, so that the nanofiber is widely concerned. If the nano-fiber can be further processed into yarn which can meet the requirements of modern textile processing, various functional fabrics and fabrics can be processed, the performance of the traditional textile can be broken through and the added value of the product can be greatly improved.
Currently, main methods for preparing nanofibers include chemical methods, phase separation methods, self-assembly methods, and spinning processes, which are considered as the most promising processes, and generally include electrostatic spinning, two-component composite spinning, melt blowing, centrifugal spinning, and electrostatic centrifugal spinning. So far, most of the nanofibers prepared by the spinning processing method are collected in the form of non-woven materials, namely non-woven fabrics, and in terms of mechanical properties, the absolute strength of the nanofibers is poor, so that the application occasions under higher mechanical strength cannot be met, and the form and application range of nanofiber products are limited. From the angle of traditional textile processing, the mechanical property of the product can be greatly improved through twisting and fiber bundling of the fibers. Therefore, nanofiber yarns are the most important research development direction in the field of nanofiber applications. At present, the research on the nanofiber yarns is still in the initial stage, the production efficiency of the nanofiber yarns needs to be improved, the stability of continuous production is problematic, the mechanical property of the yarns is poor, and the yarns cannot be equally applied to mature traditional textiles. Therefore, the realization of the efficient production of the nanofibers and the improvement of the mechanical properties of the nanofiber yarn are the final directions in which the nanofibers can be widely applied.
Currently, some nanofiber yarn formation has been reported, and most of these methods are based on electrostatic spinning. Chinese patent CN103088478A discloses a device and a method for continuously preparing oriented electrostatic spinning nanofiber yarns, which realizes fiber orientation and continuous preparation. Dalton PD, Polymer, 2005, 46, 611-614 discloses that the addition of a double circular disc device during electrospinning collected oriented nanofiber yarn, but the yarn length was too short. These technical schemes all achieve certain effects, but because the electrostatic spinning is adopted to prepare the nanofiber essentially, the jet flow splitting and whip instability phenomena in the electrostatic spinning process cannot be avoided, which can cause the yarn forming process to fluctuate, thereby affecting the yarn quality, and meanwhile, objective factors with low yield exist, so that the industrial production cannot be adapted.
Chinese patent CN105887223A discloses a high-speed centrifugal spinning device for preparing nanofiber yarns by one-step molding and a method for preparing nanofiber yarns, which are used to prepare nanofiber yarns with high yield but thick fiber diameter, and due to the adoption of extremely high rotating speed, the airflow field around the spinneret fluctuates violently, the fiber morphology is poor, the yarn quality is also affected, and the yarn forming process is unstable.
Chinese patent CN106868675A discloses a device for continuously preparing nanofiber core-spun yarns, which obtains the nanofiber core-spun yarns with better appearance. Chinese patent CN101418472A discloses a spider silk protein/polylactic acid composite nanofiber yarn and a preparation method thereof, which collects oriented nanofiber yarns by using a static water coagulation bath, but the yarn twisting is not easy to control. In US6106913A, a method is disclosed in which nanofibers are guided onto a filament by an air-jet deposition process and wound to form a nanofiber core spun yarn. These patents achieve certain technical effects, but the essence is to use the core yarn to improve the mechanical strength of the product. From the perspective of product application, the core yarn is also a method for solving the problem of poor strength in practical application of the nanofiber yarn, however, the strength of the nanofiber itself is not increased. How to solve the problem of poor mechanical properties of nanofiber yarns from the point of view of nanofiber yarns is an important research direction.
Chinese patent CN102703998B discloses an air jet spinning yarn device and a preparation method of electrostatic spinning nanofibers, which utilizes rotating air flow to prepare nanofiber yarns with good orientation arrangement, but the twisting effect is poor. Chinese patent CN103603063B discloses a device and a method for continuously preparing oriented nanofiber yarns, which realize the continuous production of nanofiber yarns, and have good fiber orientation arrangement but low twisting degree. Although the technical schemes all obtain the nanofiber yarns with good orientation arrangement, the twisting effect is not ideal, the cohesion of the fibers is poor, and the strength cannot be further improved; or additional twisting equipment and supporting equipment are needed, so that equipment is complicated, the process flow is increased, and the requirements of industrial production cannot be met.
The electrostatic centrifugal spinning combines the advantages of centrifugal spinning and electrostatic spinning, can adopt a solvent method to prepare spinning solution and can also adopt melt spinning, and simultaneously has no high requirement on the conductivity of the spinning solution. Due to the double stretching effect of centrifugal force and electrostatic field force, the molecular chain orientation degree in the fiber is high, the orientation arrangement degree of fiber aggregates is also high, the yield is very high, the fiber quality is also superior to that of pure centrifugal spinning, and the advantage is particularly obvious in electrostatic centrifugal spinning with a nozzle. Chinese patent CN103409861A discloses a high-speed device and process for preparing centrifugal electrospun nano twisted wires, which can prepare nano twisted wires with controllable orientation and high yield, but the embodiment indicates that the voltage is 60kV, i.e. the essence is still electrostatic spinning, the centrifugal rotating umbrella mainly plays a role of feeding at a low rotating speed, the centrifugal action is far less than the action of electrostatic field force, and the melt centrifugal process without nozzle has serious adhesion of jet-flow doubling, insufficient stretching, poor fiber morphology and thick diameter, and there is a great potential safety hazard by using a very high voltage, the twist is provided by a rotating airflow formed by adding a plurality of air pumps, and the equipment is complex.
The invention adopts nozzle solvent type electrostatic centrifugal spinning, the whole process flow selects relatively low rotating speed and lower than the critical voltage of fiber forming in electrostatic spinning, the jet flow is stable, the fiber appearance is uniform, the yarn forming process is stable, and the operation is safe. The self-twisting area is formed by utilizing the airflow constraint jet flow track, the nano fiber yarn is automatically twisted in the fiber forming process and is formed under the airflow traction, higher twist can be obtained without adding twisting equipment, and the technical effect which is not achieved in any other schemes for preparing the nano fiber yarn is achieved.
Disclosure of Invention
The invention aims to solve the technical problem of providing a device and a method for continuously preparing self-twisting nanofiber yarns. The invention can solve the problems of poor stability of nanofiber yarn continuous production, complex twisting process, poor twisting effect, low mechanical strength of yarn and the like in the prior art.
In order to solve the technical problem, the solution of the invention is as follows:
the continuous preparation device of the self-twisting nanofiber yarn comprises a spinning system, a bundling system and a winding and collecting system; the spinning system comprises a vertically installed motor, a rotating shaft at the bottom of the motor is connected with a spinning device made of metal materials through a coupling and can drive the spinning device to rotate around a shaft; a plurality of spinneret orifices are uniformly arranged along the circumferential direction of the spinneret, and an internal cavity of the spinneret is sequentially connected with the peristaltic pump and the storage tank through a feeding pipe; the spinneret is connected to the positive pole of the electrostatic generator through a cable, so that the spinneret and the spinneret holes are conductive (the conductivity is provided by a metal spinneret, a conductive connecting piece or a conductive coating);
the bundling system comprises a funnel-shaped bundling device, a fan and at least two air shower heads, wherein the fan is connected to the air shower heads through air pipes; the air shower heads are uniformly arranged on the circumference taking the rotating shaft of the motor as the central axis and are higher than the spinneret and can rotate inwards to adjust the air outlet direction; the funnel-shaped buncher is a conductive plate, the middle part of which is provided with a funnel-shaped sinking part with an adjustable opening angle, and the conductive plate is connected to the negative pole of the electrostatic generator through a cable; a through hole is arranged at the center of the sinking part, and the through hole, the spinneret and the motor rotating shaft are positioned on the same vertical axis; the plane where each spinneret orifice is positioned on the spinneret is arranged in parallel with the plane part of the funnel-shaped buncher;
the winding and collecting system comprises a yarn guide roller and a winding roller, wherein the yarn guide roller is positioned below the through hole of the funnel-shaped buncher.
In the invention, the opening angle range of the sinking part of the funnel-shaped buncher is 30-90 degrees.
In the invention, the air shower head can rotate inwards by at least 45 degrees.
In the invention, the coupling comprises a cylindrical elastic part and an insulating part; the top of the elastic piece is fixedly arranged at the tail end of the motor rotating shaft, and the bottom of the elastic piece is connected to the top of the insulating piece through a connecting piece; the bottom of the insulator is fixed to the top of the spinneret by a connector.
In the invention, the distance between the opening side of the funnel-shaped buncher and the spinneret can be adjusted within the range of 10-20 cm.
In the invention, the funnel-shaped buncher has a double-layer structure and is respectively an upper insulating layer and a lower conducting layer.
The invention further provides a method for continuously preparing the self-twisting nanofiber yarn by using the device, which comprises the following steps:
(1) continuously injecting the spinning solution into a spinning machine by a peristaltic pump (the liquid level of the spinning solution is lower than the top end of the spinning machine);
(2) starting a static and dynamic generator to form an electrostatic field between the spinneret and the funnel-shaped buncher, wherein the voltage range of the static generator is 0-50 kV;
(3) starting a motor and controlling the rotating speed to be 1000-;
(4) starting a fan, adjusting the internal rotation angle of each air shower head, adjusting the opening angle of the funnel-shaped buncher and constraining the nano-fiber track together; the nanofibers are bundled under the action of air flow restraint and centrifugal rotation, and self-twisting is simultaneously realized to form nanofiber yarns;
(5) the nanometer fiber yarn is drawn out by the yarn guide roller after passing through the through hole of the funnel-shaped buncher under the traction of airflow, and is finally wound into a yarn drum by the winding roller.
Compared with the prior art, the invention has the beneficial effects that:
(1) the invention adopts electrostatic centrifugal spinning to prepare the nano-fiber, and has high production efficiency; the spinnable fiber raw material is soluble and fusible, and has more selection range; the critical voltage lower than the fiber forming voltage in electrostatic spinning is adopted, so that the energy is saved and the safety is improved;
(2) in the invention, no guide yarn or core yarn is additionally added, and no twisting equipment is additionally added, so that the yarn forming process is simpler, the yarn forming process is shortened, and the production efficiency of the nanofiber yarn is further improved;
(3) due to the double stretching action of centrifugal force and electrostatic force, the orientation of the partial molecular chains in the fibers is good, the fibers in the yarn have high orientation arrangement, and meanwhile, due to the self-twisting action in the centrifugal process, the fibers are tightly cohered, and the mechanical property of the yarn is greatly improved;
(4) the nanofiber yarn provided by the invention integrates high orientation degree, good continuity, synchronous twisting and high-efficiency short flow, and provides a new method for preparing the nanofiber yarn.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a front view of the coupling of the present invention;
fig. 3 is a sectional view taken along the line a-a in fig. 2.
Description of reference numerals: the device comprises an electrostatic generator 1, a motor 2, a fan 3, a first air shower head 4, a second air shower head 5, a coupler 6, a spinneret 7, nano fibers 8, a self-twisting area 9, a funnel-shaped buncher 10, a winding roller 11, a yarn guide roller 12, a motor rotating shaft 13, an elastic piece 14 and an insulating piece 15.
Detailed Description
The present invention will be further described with reference to the following specific examples. It should be noted that these examples are only for illustrating the present invention, and are not intended to limit the scope of the present invention, so as to facilitate the further understanding of the technical ideas and features of the present invention by those skilled in the art. It should be noted that various changes and modifications could be made herein by one skilled in the art without departing from the spirit of the invention, and equivalents thereof would fall within the scope of the invention as defined by the appended claims.
As shown in fig. 1 and 2, the self-twisting nanofiber yarn continuous preparation apparatus includes a spinning system, a bundling system, and a winding collection system. The spinning system comprises a vertically installed motor 2, a rotating shaft at the bottom of the motor 2 is connected with a spinning device 7 made of metal materials through a coupling 6, and the spinning device 7 can be driven to rotate around a shaft; the coupling 6 includes a cylindrical elastic member 14 and an insulating member 15; the top of the elastic piece 14 is fixedly arranged at the tail end of the motor rotating shaft 13, and the bottom of the elastic piece is connected to the top of the insulating piece 15 through a connecting piece; the bottom of the insulator 15 is fixed to the top of the spinneret 7 by a connector. A plurality of spinneret orifices are uniformly arranged along the circumferential direction of the spinneret 7, and an internal cavity of the spinneret 7 is sequentially connected with a peristaltic pump and a storage tank through a feeding pipe; the spinneret 7 is connected to the positive pole of the electrostatic generator 1 (the operating voltage range is 2-10kV) through a cable, so that the spinneret 7 and spinneret holes have conductivity;
the bundling system comprises a funnel-shaped bundling device 10, a fan 3, a first air shower head 4 and a second air shower head 5, wherein the fan 3 is connected to the first air shower head 4 and the second air shower head 5 through air pipes; the first air shower head 4 and the second air shower head 5 are arranged on the horizontal planes at two sides of the motor rotating shaft at equal intervals and are higher than the spinneret 7 (if a plurality of air shower heads are arranged, the air shower heads are uniformly arranged on the circumference taking the motor rotating shaft as the central axis), and the first air shower head 4 and the second air shower head 5 can rotate inwards to adjust the air outlet direction to be at least 45 degrees; the funnel-shaped buncher 10 is a conductive plate provided with a funnel-shaped sinking part with an adjustable opening angle in the middle and is connected to the negative electrode of the electrostatic generator 1 through a cable; the opening angle range of the sinking part of the funnel-shaped buncher is 30-90 degrees, a through hole is formed in the center of the sinking part, and the through hole, the spinneret 7 and the motor rotating shaft 13 are located on the same vertical axis; the plane where each spinneret hole on the spinneret 7 is positioned is arranged in parallel with the plane part of the funnel-shaped buncher 10; the distance between the opening side of the funnel-shaped buncher 10 and the spinneret 7 is adjustable, and the adjusting range is 10-20 cm. The funnel-shaped buncher 10 has a double-layer structure, i.e., an upper insulating layer and a lower conductive layer.
The winding collecting system comprises a yarn guide roller 12 and a winding roller 11, wherein the yarn guide roller 12 is positioned below the through hole of the funnel-shaped buncher 10.
The method for continuously preparing the self-twisting nanofiber yarn by using the device comprises the following steps:
(1) continuously injecting the spinning solution into a spinning sprayer 7 by a peristaltic pump;
(2) starting the static and dynamic generator 1 to form an electrostatic field between the spinneret and the funnel-shaped buncher 10, wherein the voltage range of the static generator 1 is 0-50 kV;
(3) starting the motor 2 and controlling the rotating speed to be 1000-;
(4) starting the fan 3, adjusting the internal rotation angles of the first air shower head 4 and the second air shower head 5, adjusting the opening angle of the funnel-shaped buncher 10, and constraining the running track of the nano fibers 8 together, wherein the area where the nano fibers 8 are located is the self-twisting area 9; the nano-fibers 8 are bundled under the action of air flow restraint and centrifugal rotation and simultaneously realize self-twisting to form nano-fiber yarns;
(5) the nanometer fiber yarn passes through the through hole of the funnel-shaped buncher 10 under the traction of airflow, is drawn out by the yarn guide roller 12, and is finally wound into a yarn bobbin by the winding roller 11.
Specific example 1:
spinning is then carried out using a spinning solution prepared from ethyl cellulose and an ethanol/water solution. The spinning solution with the concentration of 20% is injected into a spinneret 7 through a peristaltic pump, the spinneret 7 is connected with the positive electrode of an electrostatic generator 1, the distance between the spinneret 7 and the top end of a funnel-shaped buncher 10 is 10cm, the first 4 air shower head and the second 5 air shower head have the angle of 30 degrees, the opening angle of the funnel-shaped buncher 10 is 60 degrees, the electrostatic generator 1 is opened, the voltage is adjusted to be 6kV, a motor 2 is started, the rotating speed is adjusted to be 2000rpm, when the self-twisting area 9 appears, a winding roller 11 is started, twisted nanofiber yarns are pulled out through a yarn guide roller 12 under the action of air flow traction, the winding motor is started, the rotating speed is set to be 80rpm, and the nanofiber yarns are continuously collected.
Claims (4)
1. A self-twisting nanofiber yarn continuous preparation device comprises a spinning system, a bundling system and a winding and collecting system; the spinning system is characterized by comprising a vertically installed motor, wherein a rotating shaft at the bottom of the motor is connected with a spinning device made of metal materials through a coupling and can drive the spinning device to rotate around a shaft; a plurality of spinneret orifices are uniformly arranged along the circumferential direction of the spinneret, and an internal cavity of the spinneret is sequentially connected with the peristaltic pump and the storage tank through a feeding pipe; the spinneret is connected to the positive pole of the electrostatic generator through a cable, so that the spinneret and the spinneret holes are conductive;
the bundling system comprises a funnel-shaped bundling device, a fan and at least two air shower heads, wherein the fan is connected to the air shower heads through air pipes; the air shower heads are uniformly arranged on the circumference taking the rotating shaft of the motor as the central axis and are higher than the spinneret and can rotate inwards to adjust the air outlet direction; the funnel-shaped buncher is a conductive plate, the middle part of which is provided with a funnel-shaped sinking part with an adjustable opening angle, and the conductive plate is connected to the negative pole of the electrostatic generator through a cable; the funnel-shaped buncher has a double-layer structure and is an upper insulating layer and a lower conducting layer respectively; a through hole is arranged at the center of the sinking part, and the through hole, the spinneret and the motor rotating shaft are positioned on the same vertical axis; the plane where each spinneret orifice is positioned on the spinneret is arranged in parallel with the plane part of the funnel-shaped buncher;
the winding and collecting system comprises a yarn guide roller and a winding roller, and the yarn guide roller is positioned below the through hole of the funnel-shaped buncher; the opening angle range of the sinking part of the funnel-shaped buncher is 30-90 degrees; the air shower head can rotate at least 45 degrees inwards.
2. The apparatus of claim 1, wherein the coupling comprises a cylindrical elastomeric member and an insulator member; the top of the elastic piece is fixedly arranged at the tail end of the motor rotating shaft, and the bottom of the elastic piece is connected to the top of the insulating piece through a connecting piece; the bottom of the insulator is fixed to the top of the spinneret by a connector.
3. The device of claim 1, wherein the distance between the opening side of the funnel-shaped buncher and the spinneret can be adjusted within a range of 10-20 cm.
4. The method for continuously preparing the self-twisted nanofiber yarn by using the device as claimed in claim 1, is characterized by comprising the following steps:
(1) continuously injecting the spinning solution into a spinning device by adopting a peristaltic pump;
(2) starting a static and dynamic generator to form an electrostatic field between the spinneret and the funnel-shaped buncher, wherein the voltage range of the static generator is 0-50 kV;
(3) starting a motor and controlling the rotating speed to be 1000-;
(4) starting a fan, adjusting the internal rotation angle of each air shower head, adjusting the opening angle of the funnel-shaped buncher and constraining the nano-fiber track together; the nanofibers are bundled under the action of air flow restraint and centrifugal rotation, and self-twisting is simultaneously realized to form nanofiber yarns;
(5) the nanometer fiber yarn is drawn out by the yarn guide roller after passing through the through hole of the funnel-shaped buncher under the traction of airflow, and is finally wound into a yarn drum by the winding roller.
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| CN111118678B (en) * | 2020-03-04 | 2021-03-23 | 青岛大学 | Electrostatic spinning nanofiber yarn equipment |
| CN113755951A (en) * | 2021-09-14 | 2021-12-07 | 天津工业大学 | Continuous preparation device and method of self-twisting nanofiber yarn formed in one step |
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