KR102646713B1 - Nanofiber manufacturing apparatus and nanofiber manufacturing method using the same - Google Patents

Abstract

The present invention relates to a nanofiber manufacturing apparatus and manufacturing method that can improve the uniformity of a nanofiber web, and includes a nozzle for producing fiber yarn by spinning a solution supplied through a solution supply unit, and surrounding the solution supply unit and the nozzle. It is formed and includes an air moving part that discharges sheath air and an ion chamber connected to the air moving part and supplying unipolar ions to the air moving part, wherein a carbon fiber ionizer is formed in the ion chamber, the Unipolar ions generated through the carbon fiber ionizer are supplied to the air moving unit through the ion chamber and discharged to the outside along with the sheath air.

Description

Nanofiber manufacturing device and nanofiber manufacturing method {NANOFIBER MANUFACTURING APPARATUS AND NANOFIBER MANUFACTURING METHOD USING THE SAME}

The present invention relates to a nanofiber manufacturing apparatus and a nanofiber manufacturing method, and more specifically, to a nanofiber manufacturing apparatus and manufacturing method that can improve the uniformity of a nanofiber web.

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

Methods for manufacturing these nanofibers include electrospinning, where a high-voltage electric field is applied to the raw polymer material, causing electrical repulsion within the raw material, causing the molecules to aggregate and split into nano-sized threads; There is a solution blow spinning method in which a polymer solution is spun and fibers are formed according to the spinning speed of the polymer solution and the speed of the sheath air surrounding the solution.

Solution spinning has the advantages of being cheaper, faster production speed, and ensuring safety of operation compared to electrospinning. However, since nanofiber production relies only on pneumatic attachment, there is a disadvantage in that the size and distribution of the pore size between fibers is not uniform.

In addition, when using multiple nozzles, the air flow and resulting turbulence may cause fibers to stick together and clump together.

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

Referring to Figures 1 and 2, it can be seen that in the case of the conventional solution spinning method, sheath air is discharged to the outside of the polymer solution being spun, and fibers are created through the polymer solution by the pneumatic pressure of the sheath air. However, as shown in Figure 1, there is no device other than sheath air discharge through the air moving unit, so there is a limitation in that fiber creation must depend only on the pneumatic pressure of the sheath air. In this case, only the pneumatic pressure of the sheath air is shown in Figure 2. As described above, there is a problem that a bundle phenomenon may occur where the generated fibers clump together.

The problem to be solved by the present invention is to provide a nanofiber manufacturing device and a nanofiber manufacturing method that can improve the uniformity of the 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 not mentioned will be clearly understood by those skilled in the art from the description below.

The nanofiber production device according to an embodiment of the present invention for realizing the above object is formed by surrounding a nozzle that produces fiber yarn by spinning a solution supplied through a solution supply unit, the solution supply unit, and the nozzle, and a sheath. It includes an air moving part that discharges air and an ion chamber connected to the air moving part and supplying unipolar ions to the air moving part, wherein a carbon fiber ionizer is formed in the ion chamber, and the carbon fiber ionizer The unipolar ions generated through the ion chamber are supplied to the air moving unit and discharged to the outside along with the sheath air.

In addition, the nanofiber manufacturing method according to an embodiment of the present invention for realizing the above problem includes preparing a nozzle for spinning a solution to generate fiber yarn and a solution supply unit for supplying the solution to the nozzle, sheath air, and stage Arranging an air cap that receives polar ions and discharges 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 detaching the spacer. It includes adjusting the contact position of the solution radiated through the nozzle and the unipolar ion by adjusting the position of the air cap.

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

The air moving unit includes an air supply unit that supplies sheath air, an air cap that adjusts the discharge position of the supplied sheath air, an air guide unit that guides the sheath air supplied through the air supply unit to the air cap, and the air. It may include an air outlet that discharges 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.

It may further include an air cap support part supporting the air cap from the solution supply part, and the air cap support part may be located between the air cap and the solution supply part.

It may further include an air cap supporter supporting the air cap from the solution supply unit.

The air cap may be formed to become closer to the nozzle and have a diameter that decreases as the solution radiates.

The air outlet may be formed at the end of the air cap in a direction that meets the solution emitted from the nozzle.

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

The spacer is formed in a ring shape and can 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 and the nozzle coupled thereto.

By inserting a plurality of spacers, the moving position of the air cap can 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 that emits the solution may be formed at the end of the nozzle.

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

In the step of arranging the air cap around the nozzle and the solution supply part, the step further includes inserting an air cap supporter for supporting the air cap with respect to the solution supply part between the air cap and the solution supply part. can do.

In the nanofiber manufacturing apparatus and 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 unit, and unipolar ions separately generated through the carbon fiber ionizer are generated in the ion chamber. It is supplied to the air moving unit through the air moving unit and discharged to the outside along with the sheath air, thereby charging the discharged fibers to a unipolar level, so that the charged fibers have a repulsive force against each other, thereby suppressing the agglomeration phenomenon between the fibers.

In addition, the nanofiber manufacturing apparatus and nanofiber manufacturing method according to an embodiment of the present invention are arranged while maintaining mutual repulsion by unipolar ions during the formation process of nanofibers, thereby improving the uniformity of the spacing between fibers (pore size). It can be improved.

In addition, the nanofiber manufacturing apparatus and nanofiber manufacturing method according to an embodiment of the present invention adjust the position of the sheath air outlet with a spacer, so that the contact position between the solution emitted through the nozzle and the unipolar ion and the air discharged from the outlet are determined. By finely controlling the pneumatic pressure of the sheath air, the elongation and formation of nanofibers can be precisely controlled.

In addition, the nanofiber manufacturing apparatus and nanofiber manufacturing method according to an embodiment of the present invention do not ionize the air through high voltage near the discharge port, but instead 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 high voltage is applied to the system, and has the effect of preventing the effect on the discharge fiber due to the system's own charging near the discharge port.

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

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

The embodiments described below are shown as examples to aid understanding of the invention, and it should be understood that the present invention can be implemented with various modifications different from the embodiments described herein. However, when describing the present invention, if it is determined that detailed descriptions of related known functions or components may unnecessarily obscure the gist of the present invention, the detailed descriptions and specific illustrations will be omitted. Additionally, in order to facilitate understanding of the invention, the attached drawings are not drawn to scale and the dimensions of some components may be exaggerated.

The first and second terms used in this application may be used to describe various components, but the components should not be limited by the terms. Terms are used only to distinguish one component from another.

Additionally, the terms used in this application are merely used to describe specific embodiments and are not intended to limit the scope of rights. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, terms such as “comprise,” “consist of,” or “consist of” are intended to designate the presence of features, numbers, steps, operations, components, parts, or a combination thereof described in the specification, but are intended to indicate the presence of one or It should be understood that this does not exclude in advance the presence or addition of other features, numbers, steps, operations, components, parts, or combinations thereof.

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

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

Referring to FIGS. 3 to 6, the nanofiber manufacturing apparatus according to the first embodiment of the present invention includes a solution supply unit 100 that supplies a solution for producing fiber yarn through spinning, and a solution supply unit 100 surrounding the solution supply unit 100. An air moving unit 200 is formed to move the sheath air and discharge the sheath air together with the solution emitted through the solution supply unit 100. It is connected to the air moving unit 200 and is connected to the air moving unit 200. It includes an ion chamber 300 that supplies polar ions and discharges them together with sheath air.

A nozzle 110 is formed at the end of the solution supply unit 100 and is coaxially connected to the solution supply unit 100, and the solution supplied from the solution supply unit 100 is emitted to the outside through the nozzle 110. A carbon fiber ionizer 310 is connected to the ion chamber 300, and unipolar ions generated through the carbon fiber ionizer 310 are supplied to the air moving unit 200 through the ion chamber 300 to produce sheath air. It is discharged to the outside along with

Conventionally, there was a limitation in that fiber creation depended on the pneumatic pressure of sheath air without any other device other than discharging sheath air through an air moving part. However, according to one embodiment of the present invention, unipolar ions are discharged together with sheath air using sheath air as a carrier gas, thereby unipolarly charging the fibers spun through the nozzle 110, and making them unipolarly charged. The fibers have a repulsive force against each other, which can suppress the bundle phenomenon where they clump together.

In addition, during the formation process between fibers, the uniformity of the spacing between fibers (pore size) can be increased as a result of the fibers being arranged while maintaining a constant repulsive force. 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 surrounded by an air moving unit 200, and can transfer the solution through the hollow space to the nozzle 110 formed at the end of the solution supply unit 100.

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 nanofiber to be manufactured.

The nozzle 110 is formed at the end of the solution supply unit 100, and can generate fiber yarn by spinning the solution supplied through the solution supply unit 100. A nozzle tip 111 that emits a solution may be formed at the end of the nozzle 110. The shape of the nozzle tip may be circular, but is not limited to this, and may be formed in various shapes to facilitate radiation. The diameter of the nozzle tip 111 is significantly smaller than the diameters of the solution supply unit 100 and the nozzle 110, so that nanoscale fibers can be manufactured by spraying the solution through the nozzle tip 111.

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

The air moving unit 200 includes an air supply unit 210 that supplies sheath air, an air cap 230 that adjusts the discharge position of the supplied sheath air, and an air cap (210) for sheath air discharged through the air supply unit 210. 230) and may include an air outlet 240 that discharges the sheath air of the air cap 230 to meet the radiated solution.

The air supply unit 210 is formed perpendicular to the solution radiating direction of the nozzle 110 and can supply sheath air in a direction perpendicular to the solution radiating direction of the nozzle 110.

If the nozzle 110 and the air supply unit 210 are formed in a parallel direction and sheath air is supplied coaxially to the air outlet 240, the unstable flow of sheath air pressured from the outside by strong hydraulic pressure flows in the coaxial direction. As it is delivered directly to the air outlet, it can interfere with the creation of a highly uniform nanofiber web when creating fiber yarns from the solution spun from the nozzle.

Therefore, as in one embodiment of the present invention, the air supply unit 210 is manufactured perpendicular to the solution radiation direction of the nozzle 110, and the sheath air flowing in through the air supply unit 210 is directed once at the air guide unit 220. After stabilization, a highly uniform nanofiber web can be created by guiding it back to the air cap 230 and the air outlet 240.

According to one embodiment of the present invention, the supply path of the air supply unit 210 is formed perpendicular to the nozzle 110 and the solution supply unit 100, but the supply path of the air supply unit 210 does not necessarily have to be formed vertically. There is no, and the supply path may be formed at various angles as long as the nozzle 110 and the solution supply unit 100 are not parallel or close to the direction of movement of the solution.

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, and unipolar ions formed through the carbon fiber ionizer 310 can be supplied to the air supply unit 210 through the ion chamber 300. .

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

When high voltage is applied near the nozzle as in the past, there is a risk that a fire may occur due to the high voltage, which may be directly related to the safety of process workers. Additionally, ozone may be generated when high voltage is applied, which may have adverse environmental effects through ozone generation.

In addition, when high voltage is applied near the nozzle, the area around the nozzle may unintentionally become charged. In this way, there is a risk that the total amount of charges may become 0, which may hinder the generation of ions. there is. Additionally, if a ground is created in an unintended location due to the surrounding environment, an electric field is formed between the spinning system and the ground, which may result in ions not being supplied to the discharged fiber.

The air guide part 220 is formed on the outer circumference of the solution supply part 100 through a space separated from the solution supply part 100, and can guide the sheath air supplied through the air supply part 210 to the air cap 230. there is. A spacer 400 is inserted into the outside of the air guide portion 220 to adjust the position of the air cap 230, which will be described later.

The air cap 230 may be formed in a trapezoidal cone shape so that it gets closer to the nozzle 110 and its diameter decreases in the radial direction of the solution.

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

The air cap 230 is 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 can be moved through a spacer 400, which will be described later.

The air cap support part 231 is located between the air cap 230 and the solution supply part 100 and can fix and support the air cap 230 from the solution supply part 100. Additionally, since the air cap support portion 231 may be formed on the sheath air flow path, the flow of sheath air can be adjusted depending on the shape of the air cap support portion 231.

The air outlet 240 is formed at the end of the air cap 230 and may be formed toward a direction in which it meets the solution emitted from the nozzle 110. Therefore, the sheath air and unipolar ions discharged through the air outlet 240 can contact the fiber yarns spun from the nozzle tip 111 of the nozzle 110 and charge the fiber yarns to form a nanofiber web with even spacing. there is.

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 to form a carbon fiber ionizer inside the ion chamber 300. The unipolar ions generated through (310) can be supplied to the air supply unit.

The carbon fiber ionizer 310 can generate unipolar ions to charge the fiber yarn. Depending on the components of the solution and the nanofibers to be manufactured, more or less unipolar ions may be needed, so by adjusting the number of carbon fiber ionizers 310, the number of unipolar ions generated accordingly can be increased or decreased to produce various components. It can respond to solutions and the formation of various types of nanofibers accordingly.

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

Furthermore, by adjusting the position of the air outlet 240 of the air cap 230 based on the nozzle tip 111 of the nozzle 110, the fibers emitted from the nozzle tip 111 and the air discharged from the outlet 240 It became possible to control the contact positions of sheath air and unipolar ions. As a result, the difficulties in fine control of discharge air due to the unstable nature of the pressurized sheath air can be solved through fine pressure control through the spacer 400 and control of the unipolar ion supply position.

Additionally, as the position of the air cap 230 changes, an angle difference occurs between the inside of the air cap 230 and the nozzle tip 111, and the pneumatic pressure may vary through this angle difference. As a result, the elongation and formation of nanofibers can be precisely controlled by finely controlling the position of micropneumatic pressure and unipolar ion supply.

According to one embodiment of the present invention, the spacer 400 is formed in a ring shape and can be inserted and coupled around the air guide portion 220. However, the shape of the spacer 400 is not limited to one embodiment of the present invention, and it is sufficient as long as 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 inserting the spacer 400, the quality of the fiber formed can be determined, and if there is an abnormality, the spacer 400 can be removed. Additionally, the position of the air cap 230 can be finely adjusted by replacing the spacer with a different thickness.

Figure 7 is a cross-sectional view showing a nanofiber manufacturing device into which a plurality of spacers are inserted according to an embodiment of the present invention. Figure 8 is a diagram showing the difference in 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, and the moving position of the air cap can be adjusted depending on the number of inserted spacers 400. . As the number of spacers 400 inserted increases, the position of the air cap 230 moves in the direction of solution radiation from the nozzle 110, and as it moves, the sheath air and unipolar air discharged through the air outlet 240 Ions may encounter the spinning fiber at a greater distance from the nozzle 110.

Figure 8 shows the results of an experiment in which the number of spacers was increased to provide an effect of relatively slowing down ionization in order to focus on the arrangement of beaded fibers. Referring to FIG. 8, it can be seen that as the number of spacers increases in a random state, the fibers formed gradually approach a lattice arrangement.

As shown in FIG. 8, by using the spacer 400, the supply position of ions to the spun fiber can be adjusted to increase the elongation rate, thereby lowering the diameter of the fiber, and improving the regularity of the formation by maintaining a constant repulsive force. You can do it. In addition, the number of spacers 400 can be changed depending on 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 a fiber formation in the direction desired by the user. can be formed.

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

The nanofiber manufacturing method according to an embodiment of the present invention includes preparing a nozzle 110 for spinning a solution to produce fiber yarn and a solution supply unit 100 for supplying a solution to the nozzle 110, sheath air, and Arranging an air cap 230 that receives unipolar ions and discharges them in the radial direction of the nozzle 110 around the nozzle 110 and the solution supply unit 100, connecting the spacer 400 to the air cap 230 Adjusting the position of the air cap 230 by detachably disposing it between the ion chambers 300 and detaching the spacer 400 to adjust the contact position between the solution emitted through the nozzle 110 and the unipolar ion. It includes steps to:

In the step of adjusting the position of the air cap 230, the position of the air cap 230 can be adjusted by using a plurality of spacers 400, and the air cap 230 is connected to the nozzle 110 and the solution supply unit 100. In the step of arranging the circumference, the step of inserting the air cap support part 231 for supporting the air cap 230 with respect to 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 shown and described, but the present invention is not limited to the specific embodiments described above, and may be used in the technical field to which the invention pertains without departing from the gist of the present invention as claimed in the claims. Of course, various modifications can be made by those skilled in the art, and these modifications should not be understood individually from the technical idea or perspective of the present invention.

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

Claims (17)

A nozzle that generates fiber yarn by spinning the solution supplied through the solution supply unit;
an air moving part formed surrounding the solution supply part and the nozzle and discharging sheath air; and
It is connected to the air moving unit and includes an ion chamber that supplies unipolar ions to the air moving unit,
A carbon fiber ionizer is formed in the ion chamber, and unipolar ions separately generated through the carbon fiber ionizer are supplied to the air moving unit through the ion chamber,
A nanofiber manufacturing device in which the unipolar ions are discharged to the outside together with the sheath air and come into contact with the fiber yarns to charge the fiber yarns. In paragraph 1:
The solution supply unit is a nanofiber manufacturing device coaxially connected to the nozzle. In paragraph 1:
The air moving part,
An air supply unit that supplies sheath air;
An air cap that adjusts the discharge position of the supplied sheath air;
an air guide unit that guides the sheath air supplied through the air supply unit to the air cap; and
A nanofiber manufacturing device including an air discharge port that discharges 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,
The nanofiber manufacturing apparatus further includes an air cap support part supporting the air cap from the solution supply part, and the air cap support part is located between the air cap and the solution supply part. In paragraph 3,
A nanofiber manufacturing device further comprising an air cap support portion that supports the air cap from the solution supply portion. In paragraph 3,
The air cap is a nanofiber manufacturing device in which the air cap becomes closer to the nozzle and its diameter decreases as the solution radiates. In paragraph 7:
The air discharge port is a nanofiber manufacturing device formed in a direction where the end of the air cap meets the solution emitted from the nozzle. In paragraph 3,
Nanofiber manufacturing device further comprising a spacer that moves the air cap in the solution radiation direction of the nozzle. In paragraph 9:
The spacer is formed in a ring shape and is inserted and coupled to the outer circumference of the air guide part. In paragraph 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 paragraph 11:
A nanofiber manufacturing device that controls the moving position of the air cap by inserting a plurality of spacers and controlling the number of insertions of the plurality of spacers. In paragraph 11:
A nanofiber manufacturing device in which the spacer is formed to be detachable and controls the position of the air cap. In paragraph 1:
A nanofiber manufacturing device in which a nozzle tip for emitting the solution is formed at the end of the nozzle. Preparing a nozzle for spinning a solution to produce fiber yarn and a solution supply unit for supplying a solution to the nozzle;
Arranging an air cap that receives sheath air and unipolar ions and discharges them in a radial direction of the nozzle around the nozzle and the solution supply unit;
removably disposing a spacer between the air cap and the ion chamber; and
A nanofiber manufacturing method comprising the step of adjusting the contact position of the solution radiated through the nozzle and the unipolar ion by adjusting the position of the air cap in the solution radiating direction of the nozzle through detachment of the spacer. In paragraph 15:
A nanofiber manufacturing method in which, in the step of adjusting the position of the air cap, the position of the air cap is adjusted using a plurality of spacers. In paragraph 15:
In the step of arranging the air cap around the nozzle and the solution supply unit, the step further includes inserting an air cap supporter for supporting the air cap with respect to the solution supply unit between the air cap and the solution supply unit. Nanofiber manufacturing method.