KR20210004641A - Nanofiber manufacturing apparatus and nanofiber manufacturing method using the same - Google Patents

Abstract

The present invention relates to a nanofiber manufacturing apparatus and a nanofiber manufacturing method, capable of improving uniformity of a nanofiber web. The nanofiber manufacturing apparatus comprises: a nozzle which spins a solution supplied through a solution supply part to generate fiber yarn; an air moving part which is formed to surround the solution supply part and the nozzle, and which discharges sheath air; and an ion chamber which is connected to the air moving part and which supplies unipolar ions to the air moving part. In the ion chamber, a carbon fiber ionizer is formed, and unipolar ions generated through the carbon fiber ionizer are supplied to the air moving part through the ion chamber so as to be discharged to the outside together with the sheath air.

Description

Nano fiber manufacturing device and method of manufacturing nano fiber {NANOFIBER MANUFACTURING APPARATUS AND NANOFIBER MANUFACTURING METHOD USING THE SAME}

The present invention relates to an apparatus for manufacturing nanofibers and a method for manufacturing nanofibers, and more particularly, to an apparatus and method for manufacturing nanofibers capable of improving the uniformity of a nanofiber web.

Nanofibers are ultrafine fibers with a diameter of tens to hundreds of nanometers, and nanofibers are used in various industrial fields as the industry develops.

As a method of manufacturing such nanofibers, an electric repulsive force is generated inside the raw material by applying a high voltage electric field to the raw material polymer material, so that the molecules aggregate and split into nano-sized yarns, and the electrospinning method, There is a solution blow spinning method in which fibers are formed according to the spinning speed of the polymer solution by spinning the polymer solution and the speed of the sheath air surrounding the solution.

Solution spinning has advantages in that it is inexpensive compared to electrospinning, has a fast production speed, and secures driving safety. However, there is a disadvantage that the size and distribution of the pore size are not uniform because the nanofibers are manufactured only by pneumatic adhesion.

In addition, when a plurality of nozzles are used, the air flow and the resulting turbulent flow may cause fibers to stick to each other and aggregate.

1 is a schematic diagram showing a conventional solution spinning method. Figure 2 is a diagram showing agglomeration between fibers of nanofibers formed by a conventional solution spinning method.

Referring to FIGS. 1 and 2, in the case of a conventional solution spinning method, it can be seen that the sheath air is discharged to the outside of the spun polymer solution, and fibers are generated through the polymer solution by the pneumatic pressure of the sheath air. However, as shown in Fig. 1, there is no other device other than the sheath air discharge through the air moving unit, so there is a limit to rely only on the pneumatic pressure of the sheath air for the generation of fibers. As described above, there is a problem in that a bundle phenomenon may occur in which the produced fibers are bundled together.

An object to be solved of the present invention is to provide a nanofiber manufacturing apparatus and a nanofiber manufacturing method capable of improving the uniformity of a nanofiber web when manufacturing nanofibers through solution spinning.

The problems of the present invention are not limited to the problems mentioned above, and other problems that are not mentioned will be clearly understood by those skilled in the art from the following description.

The nanofiber manufacturing apparatus according to an embodiment of the present invention for realizing the above problem includes a nozzle for generating fiber yarn by spinning a solution supplied through a solution supply unit, the solution supply unit and the nozzle surrounding the nozzle, and An air moving unit that discharges air and an ion chamber connected to the air moving unit and supplying unipolar ions to the air moving unit, wherein a carbon fiber ionizer is formed in the ion chamber, and the carbon fiber ionizer is The unipolar ions generated through the ion chamber are supplied to the air moving unit and are discharged to the outside together with the sheath air.

In addition, the nanofiber manufacturing method according to an embodiment of the present invention for realizing the above object includes the steps of preparing a nozzle for spinning a solution to generate fiber yarn and a solution supply unit for supplying a solution to the nozzle, sheath air and Arranging around the nozzle and the solution supply unit an air cap receiving polar ions and discharging in the radial direction of the nozzle, disposing a spacer detachably between the air cap and the ion chamber, and detaching the spacer And adjusting the contact position of the solution radiated through the nozzle and the unipolar ion by adjusting the position of the air cap through the air cap.

The solution supply unit may be connected coaxially with the nozzle.

The air moving unit includes an air supply unit for supplying sheath air, an air cap for adjusting a discharge position of the supplied sheath air, an air guide unit for guiding the sheath air supplied through the air supply unit to the air cap, and the air It may include an air outlet for discharging the sheath air of the cap to the outside.

The air supply unit may pass through the ion chamber, and the unipolar ions may be supplied to the air supply unit through the ion chamber.

An air cap support part for supporting the air cap from the solution supply part may be further included, and the air cap support part may be located between the air cap and the solution supply part.

An air cap support part for supporting the air cap from the solution supply part may be further included.

The air cap may be formed so as to become closer to the nozzle and decrease in diameter as it goes in the radial direction of the solution.

The air discharge port may be formed at an end of the air cap in a direction that meets the solution radiated from the nozzle.

It may further include a spacer for moving the air cap in the direction of the solution radiation of the nozzle.

The spacer is formed in a ring shape, and may be inserted and coupled to the outer circumference of the air guide part.

The spacer may be inserted between the ion chamber and the air cap to adjust the position of the air cap based on the ion chamber, the solution supply unit coupled thereto, and the nozzle.

By inserting a plurality of spacers, the moving position of the air cap may be adjusted by adjusting the number of insertions of the plurality of spacers.

The spacer is formed to be detachable, so that the position of the air cap can be adjusted.

A nozzle tip for emitting the solution may be formed at an end of the nozzle.

In the step of adjusting the position of the air cap, the position of the air cap may be adjusted by using a plurality of spacers.

In the step of disposing the air cap around the nozzle and the solution supply unit, further comprising: inserting an air cap support portion for supporting the air cap based on the solution supply unit between the air cap and the solution supply unit can do.

In the nanofiber manufacturing apparatus and the nanofiber manufacturing method according to an embodiment of the present invention, a carbon fiber ionizer is connected to an ion chamber formed in the solution supply part, and unipolar ions separately generated through the carbon fiber ionizer pass through the ion chamber. It is supplied to the air moving part through the air moving part and is discharged to the outside together with the sheath air, thereby charging the discharged fibers to a single pole, so that the charged fibers have repulsive forces with each other, thereby suppressing agglomeration between the fibers.

In addition, the nanofiber manufacturing apparatus and the nanofiber manufacturing method according to an embodiment of the present invention are arranged while maintaining repulsive force with each other by unipolar ions in the formation process of the nanofibers, thereby increasing the uniformity of the pore size. Can be improved.

In addition, the nanofiber manufacturing apparatus and the nanofiber manufacturing method according to an embodiment of the present invention, by adjusting the position of the sheath air discharge port with a spacer, the contact position of the solution radiated through the nozzle and the unipolar ions and discharged from the air discharge port. By finely adjusting the air pressure of the sheath air, the elongation and formation of nanofibers can be precisely controlled.

In addition, the nanofiber manufacturing apparatus and the nanofiber manufacturing method according to an embodiment of the present invention do not ionize air through a high voltage near the discharge port, but supply unipolar ions separately produced through a carbon fiber ionizer to the air supply unit. As a supply method, it is possible to prevent fire and ozone generation problems that may occur when a high voltage is applied to the system, and there is an effect of preventing an effect on the discharge fibers due to self-charging of the system near the discharge port.

The effects of the present invention are not limited to the effects mentioned above, and other effects that are not mentioned will be clearly understood by those skilled in the art from the description of the claims.

1 is a schematic diagram showing a conventional solution spinning method.
Figure 2 is a diagram showing agglomeration between fibers of nanofibers formed by a conventional solution spinning method.
3 is a schematic diagram showing a nanofiber manufacturing apparatus according to an embodiment of the present invention.
Figure 4 is a picture showing a nanofiber manufactured according to an embodiment of the present invention.
5 is a view showing a nanofiber manufacturing apparatus according to an embodiment of the present invention.
6 is a cross-sectional view showing a nanofiber manufacturing apparatus according to an embodiment of the present invention.
7 is a cross-sectional view showing a nanofiber manufacturing apparatus in which a plurality of spacers are inserted according to an embodiment of the present invention.
8 is a diagram showing the difference between the nanofibers produced as the number of spacers increases according to an embodiment of the present invention.

The embodiments described below are illustratively shown to aid understanding of the invention, and it should be understood that the present invention may be implemented with various modifications different from the embodiments described herein. However, when it is determined that detailed descriptions of known functions or components related to the present invention may unnecessarily obscure the subject matter of the present invention, detailed descriptions and detailed illustrations thereof will be omitted. In addition, the accompanying drawings are not drawn to scale to aid understanding of the invention, but dimensions of some components may be exaggerated.

The first and second terms used in the present application may be used to describe various elements, but the elements should not be limited by terms. The terms are only used for the purpose of distinguishing one component from another component.

In addition, terms used in the present application are only used to describe specific embodiments, and are not intended to limit the scope of the rights. Singular expressions include plural expressions unless the context clearly indicates otherwise. In the present application, terms such as "comprise", "consist of" or "consist of" are intended to designate the presence of features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, one or It is to be understood that no further features or possibilities of the presence or addition of numbers, steps, actions, components, parts, or combinations thereof are precluded.

Hereinafter, an apparatus for manufacturing nanofibers according to a first embodiment of the present invention will be described.

3 is a schematic diagram showing a nanofiber manufacturing apparatus according to a first embodiment of the present invention. 4 is a diagram showing the nanofibers manufactured according to the first embodiment of the present invention. 5 is a view showing a nanofiber manufacturing apparatus according to an embodiment of the present invention. 6 is a cross-sectional view showing the nanofiber manufacturing apparatus according to the first embodiment of the present invention.

3 to 6, the nanofiber manufacturing apparatus according to the first embodiment of the present invention surrounds the solution supply unit 100 and the solution supply unit 100 for supplying a solution for generating fiber yarn through spinning. Is formed, and is connected to the air moving unit 200 and the air moving unit 200 for discharging the sheath air together with the solution radiated through the solution supply unit 100 by moving the sheath air, and connected to the air moving unit 200 It includes an ion chamber 300 for supplying polar ions to be discharged together with the sheath air.

A nozzle 110 coaxially connected to the solution supply unit 100 is formed at the end of the solution supply unit 100, and the solution supplied from the solution supply unit 100 is radiated to the outside through the nozzle 110. A carbon fiber ionizer 310 is connected to the ion chamber 300, and the unipolar ions generated through the carbon fiber ionizer 310 are supplied to the air moving unit 200 through the ion chamber 300 to provide a cis air. And is discharged to the outside.

In the related art, there is a limit to relying on the pneumatic pressure of the sheath air to generate fibers without any other device other than the sheath air discharge through the air moving part. However, according to an embodiment of the present invention, unipolar ions are discharged together with the sheath air using the sheath air as a carrier gas, thereby charging the fibers spun through the nozzle 110 to a unipolar, and unipolarly charged The fibers have a repulsive force to each other, so that a bundle phenomenon that becomes agglomerated with each other can be suppressed.

In addition, it is possible to increase the uniformity of the pore size as a result of the arrangement of the fibers by maintaining a constant repulsive force during the formation process between the fibers. This makes it possible to obtain higher efficiency and lower differential pressure than nanofiber filters produced by spinning under the same conditions.

The solution supply unit 100 is formed in the shape of a hollow tube, is formed surrounded by the air moving unit 200, and can transfer the solution to the nozzle 110 formed at the end of the solution supply unit 100 through the hollow space.

The solution supplied to the solution supply unit 100 may be a polymer solution capable of forming nanofibers. The polymer solution may be formed of various components depending on the nanofibers to be prepared.

The nozzle 110 is formed at the end of the solution supply unit 100, and may generate fiber yarn by spinning the solution supplied through the solution supply unit 100. A nozzle tip 111 for emitting a solution may be formed at an end of the nozzle 110. The shape of the nozzle tip may be formed in a circular shape, but is not limited thereto, and may be formed in various shapes that are easy to radiate. The diameter of the nozzle tip 111 is significantly smaller than the diameter of the solution supply unit 100 and the nozzle 110, so that nano-scale fibers can be manufactured by spraying the solution through the nozzle tip 111.

Hereinafter, an air moving unit 200 according to an embodiment of the present invention will be described with reference to FIGS. 5 and 6.

The air moving unit 200 includes an air supply unit 210 for supplying sheath air, an air cap 230 for adjusting a discharge position of the supplied sheath air, and the sheath air discharged through the air supply unit 210. It may include an air guide unit 220 that guides to 230 and an air outlet 240 for discharging the sheath air of the air cap 230 to meet the radiated solution.

The air supply unit 210 is formed perpendicular to the direction in which the nozzle 110 radiates the solution, so that sheath air may be supplied in a direction perpendicular to the direction in which the solution radiates the nozzle 110.

When the nozzle 110 and the air supply unit 210 are formed in a parallel direction, and the sheath air is supplied to the air discharge port 240 in the coaxial direction, the unstable flow of the sheath air pressurized by the strong hydraulic pressure from the outside is prevented in the coaxial direction. As it is delivered to the air outlet as it is, it may interfere with the creation of a highly uniform nanofiber web when the solution is produced from the nozzle.

Therefore, as in an embodiment of the present invention, by manufacturing the air supply unit 210 perpendicular to the direction of the solution radiation of the nozzle 110, the sheath air introduced through the air supply unit 210 is once once in the air guide unit 220 After stabilizing, it is guided back to the air cap 230 and the air discharge port 240 to generate a highly uniform nanofiber web.

According to an embodiment of the present invention, the supply path of the air supply unit 210 is formed vertically with the nozzle 110 and the solution supply unit 100, but the supply path of the air supply unit 210 must be formed vertically. In addition, the nozzle 110 and the solution supply unit 100 may be formed to have various angles of supply paths unless they are parallel to or close to the solution moving direction.

The air supply unit 210 is formed to pass through the ion chamber 300. A carbon fiber ionizer 310 is disposed inside the ion chamber 300 so that unipolar ions formed through the carbon fiber ionizer 310 may be supplied to the air supply unit 210 through the ion chamber 300. .

Conventionally, there has also been a method of supplying ionized air by ionizing air introduced from the outside through a corona discharge by applying a high voltage near the nozzle. However, according to an embodiment of the present invention, a carbon fiber ionizer 310 is separately provided, and unipolar ions generated through the carbon fiber ionizer 310 are supplied to the air supply unit 210 in advance, and the sheath air and The pre-supplied unipolar ions are discharged together.

When a high voltage is applied near the nozzle as in the prior art, there is a concern that a fire may occur through the high voltage, which can be directly connected to the safety of the process operator. In addition, ozone may be generated when a high voltage is applied, which may adversely affect the environment through ozone generation.

In addition, if a high voltage is applied near the nozzle, the surroundings of the nozzle may be unintentionally charged. If the charge is self-charged in this way, the total sum of charges becomes zero, and there is a risk that the generation of ions may be inhibited. have. In addition, if a ground is created in an unintended place in the surrounding environment, an electric field is formed between the spinning system and the ground, and as a result, ions may not be supplied to the discharged fiber.

The air guide unit 220 is formed through a space separated from the solution supply unit 100 at the outer periphery of the solution supply unit 100, and can guide the sheath air supplied through the air supply unit 210 to the air cap 230. have. A spacer 400 is inserted outside the air guide unit 220 to adjust the position of the air cap 230 to be described later.

The air cap 230 may be formed in a trapezoidal cone shape, and may be formed to be closer to the nozzle 110 and decrease in diameter as the solution goes in the radial direction.

Therefore, through the shape of the air cap 230, the nozzle tip 111 of the nozzle 110 and the air outlet 240 of the air cap 230 are positioned as close as possible to each other, so that the sheath air discharged through the air cap 230 And the unipolar ions can easily contact the solution radiated from the nozzle to easily charge the solution.

The air cap 230 may be formed as a separate member from the air supply unit 210 and the air guide unit 220 and may be formed to be movable in the direction of the solution radial axis of the nozzle 110. The air cap 230 may move through a spacer 400 to be described later.

The air cap support 231 may be positioned between the air cap 230 and the solution supply unit 100 to fix and support the air cap 230 from the solution supply unit 100. In addition, since the air cap support 231 may be formed on the flow path of the sheath air, the flow of the sheath air may be adjusted according to the shape of the air cap support 231.

The air discharge port 240 may be formed at an end of the air cap 230 and may be formed toward a direction meeting the solution radiated from the nozzle 110. Therefore, the sheath air and unipolar ions discharged through the air discharge port 240 contact the fiber yarn radiated from the nozzle tip 111 of the nozzle 110 and charge the fiber yarn to form a nanofiber web with uniform intervals. have.

The ion chamber 300 is formed outside the solution supply unit 100 and the air supply unit 210, and allows the air supply unit 210 to pass through the ion chamber 300, so that the carbon fiber ionizer inside the ion chamber 300 The unipolar ions generated through 310 may be supplied to the air supply unit.

The carbon fiber ionizer 310 may generate unipolar ions to charge the fiber yarn. Since a large or small number of unipolar ions may be required depending on the components of the solution and the nanofibers to be prepared, the number of unipolar ions generated accordingly by adjusting the number of carbon fiber ionizer 310 is increased or decreased. It is possible to respond to the formation of various types of nanofibers and thus a solution of.

The spacer 400 is inserted between the ion chamber 300 and the air cap 230 in the outer circumferential space of the solution supply unit 100 and the air guide unit 220, and the ion chamber 300 and the air cap 230 By determining the distance therebetween, the position of the air cap 230 may be adjusted based on the ion chamber 300 and the solution supply unit 100 and nozzle 110 coupled thereto.

Further, by adjusting the position of the air discharge port 240 of the air cap 230 with respect to the nozzle tip 111 of the nozzle 110, fibers radiated from the nozzle tip 111 and discharged from the air discharge port 240 It is now possible to control the contact position of the cis air and unipolar ions. As a result, parts that are difficult to finely control the discharged air due to the unstable characteristics of the pressure-fed sheath air can be solved through fine pressure control through the spacer 400 and unipolar ion supply position control.

Also, as the position of the air cap 230 is changed, an angle difference between the inside of the air cap 230 and the nozzle tip 111 occurs, and the air pressure may vary through the difference in angle. Accordingly, it is possible to precisely control the elongation and formation of nanofibers by finely adjusting the micropneumatic and unipolar ion supply positions.

According to an embodiment of the present invention, the spacer 400 may be formed in a ring shape, and may be inserted and coupled around the air guide unit 220. However, the shape of the spacer 400 is not limited to one embodiment of the present invention, and it is sufficient if the position of the air cap 230 can be finely adjusted through various shapes.

The spacer 400 may be formed to be detachable. Therefore, after determining the quality of the fiber yarn formed after inserting the spacer 400, the spacer 400 may be removed if there is an abnormality. In addition, the position of the air cap 230 may be finely adjusted by replacing the spacer with a different thickness.

7 is a cross-sectional view showing a nanofiber manufacturing apparatus in which a plurality of spacers are inserted according to an embodiment of the present invention. 8 is a diagram showing the difference between the nanofibers produced as the number of spacers increases according to an embodiment of the present invention.

Referring to FIG. 7, in the nanofiber manufacturing apparatus according to an embodiment of the present invention, a plurality of spacers 400 are inserted, so that the moving position of the air cap can be adjusted according to the number of insertions of the plurality of spacers 400. . As the number of insertions of the spacer 400 increases, the position of the air cap 230 moves in the direction of the solution radiation from the nozzle 110, and the sheath air and unipolarity discharged through the air outlet 240 as it moves. The ions can meet the spinning fiber at a farther away from the nozzle 110.

8 is an experiment result of increasing the number of spacers to give an effect of relatively slowing ionization in order to focus on the arrangement of beaded fibers. Referring to FIG. 8, as the number of spacers increases in a random state, it can be seen that the fiber yarns formed gradually approach the lattice arrangement.

As disclosed in FIG. 8, by using the spacer 400, by adjusting the supply position of ions to the spun fiber, it is possible to decrease the diameter of the fiber by increasing the elongation, and improve the regularity of the formation by maintaining a constant repulsive force. I can make it. In addition, the number of spacers 400 can be changed according to the desired fiber arrangement and effect, and the number of unipolar ions can be changed by varying the number of carbon fiber ionizers 310 to form fibers in the desired direction by the user. Can be formed.

Hereinafter, a method of manufacturing a nanofiber according to an embodiment of the present invention will be described.

Nanofiber manufacturing method according to an embodiment of the present invention, the step of preparing a nozzle 110 for generating fiber yarn by spinning a solution and a solution supply unit 100 for supplying a solution to the nozzle 110, cis air and Arranging an air cap 230 that receives unipolar ions and discharges it in the radial direction of the nozzle 110 around the nozzle 110 and the solution supply unit 100, and attaches the spacer 400 to the air cap 230 The contact position of the solution radiated through the nozzle 110 and the unipolar ions is adjusted by adjusting the position of the air cap 230 through the step of detachably disposing between the ion chambers 300 and the detachment of the spacer 400 It includes the step of.

In the step of adjusting the position of the air cap 230, the position of the air cap 230 may be adjusted by using a plurality of spacers 400, and the air cap 230 is attached to the nozzle 110 and the solution supply unit 100. In the step of disposing around the circumference, the step of inserting an air cap support part 231 for supporting the air cap 230 based on the solution supply part 100 between the air cap 230 and the solution supply part 100 is further included. can do.

In the above, preferred embodiments of the present invention have been illustrated and described, but the present invention is not limited to the specific embodiments described above, and is generally used in the technical field to which the present invention belongs without departing from the gist of the present invention claimed in the claims. Of course, various modifications may be implemented by those skilled in the art, and these modifications should not be understood individually from the technical spirit or prospect of the present invention.

100: solution supply unit
110: nozzle
111: nozzle tip
200: air moving part
210: air supply
220: air guide
230: air cap
231: air cap support
240: air outlet
300: ion chamber
310: carbon fiber ionizer
400: spacer

Claims (17)

A nozzle for generating fiber yarns by spinning the solution supplied through the solution supply unit;
An air moving unit formed surrounding the solution supply unit and the nozzle and discharging sheath air; And
An ion chamber connected to the air moving part and supplying unipolar ions to the air moving part,
A carbon fiber ionizer is formed in the ion chamber, and unipolar ions generated through the carbon fiber ionizer are supplied to the air moving unit through the ion chamber and discharged to the outside together with the cis air. In claim 1,
The solution supply unit is a nanofiber manufacturing apparatus coaxially connected to the nozzle. In claim 1,
The air moving part,
An air supply unit supplying sheath air;
An air cap for adjusting the discharge position of the supplied sheath air;
An air guide part guiding the sheath air supplied through the air supply part to the air cap; And
Nanofiber manufacturing apparatus comprising an air discharge port for discharging the sheath air of the air cap to the outside. In paragraph 3,
The air supply unit passes through the ion chamber, and the unipolar ions are supplied to the air supply unit through the ion chamber. In paragraph 3,
An apparatus for manufacturing nanofibers, further comprising an air cap support part supporting the air cap from the solution supply part, wherein the air cap support part is located between the air cap and the solution supply part. In paragraph 3,
Nanofiber manufacturing apparatus further comprising an air cap support for supporting the air cap from the solution supply. In paragraph 3,
The air cap is a nanofiber manufacturing apparatus that is formed to be closer to the nozzle and decrease in diameter as the solution goes in the radial direction. In clause 7,
The air discharge port is formed in a direction to meet the solution radiated from the nozzle at the end of the air cap nanofiber manufacturing apparatus. In paragraph 3,
Nanofiber manufacturing apparatus further comprising a spacer for moving the air cap in the direction of spinning the solution of the nozzle. In claim 9,
The spacer is formed in a ring shape, the nanofiber manufacturing apparatus inserted and coupled to the outer circumference of the air guide. In claim 9,
The spacer is inserted between the ion chamber and the air cap to adjust the position of the air cap based on the ion chamber, the solution supply unit coupled thereto, and the nozzle. In clause 11,
Nanofiber manufacturing apparatus for adjusting the moving position of the air cap by inserting a plurality of spacers and adjusting the number of insertions of the plurality of spacers. In clause 11,
The spacer is formed to be detachable, the nanofiber manufacturing apparatus for adjusting the position of the air cap. In claim 1,
A nanofiber manufacturing apparatus in which a nozzle tip for spinning the solution is formed at an end of the nozzle. Preparing a nozzle for spinning a solution to generate a fiber yarn and a solution supply for supplying a solution to the nozzle;
Disposing an air cap for receiving sheath air and unipolar ions and discharging them in a radial direction of the nozzle around the nozzle and the solution supply unit;
Disposing a spacer detachably between the air cap and the ion chamber; And
And adjusting a position of the air cap through detachment of the spacer to adjust a contact position of the solution radiated through the nozzle and the unipolar ions. In paragraph 15,
In the step of adjusting the position of the air cap, a nanofiber manufacturing method of adjusting the position of the air cap by using a plurality of spacers. In paragraph 15,
In the step of disposing the air cap around the nozzle and the solution supply unit, further comprising: inserting an air cap support portion for supporting the air cap based on the solution supply unit between the air cap and the solution supply unit How to make nanofibers.

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