KR101060918B1 - Electrospinning multi-nozzle spinning pack and electrospinning apparatus comprising the same - Google Patents

Abstract

The present invention is an electrospinning multi-nozzle spinning pack including a plurality of spinning nozzles that are supplied with a polymer spinning liquid and discharged in a filament form, and are provided with a plurality of spinning nozzles, which are installed under each spinning nozzle to maintain a constant temperature in the spinning zone. A plurality of heating units to promote fiberization; A plurality of air guides attached tubularly to the end of the heating unit and guides the filaments coming out of the radiation zone by the air in a direction in which the filaments are discharged, and an air supply for supplying air to the plurality of air guides It relates to an electrospinning multi-nozzle spinning pack and an electrospinning apparatus comprising the same. The spinning pack of the present invention can improve the physical and mechanical properties of the nanofibers are used when manufacturing the nanofibers, and can increase the yield while thinning the thickness of the nanofibers.

Spinning Pack, Multiple Nozzle, Electrospinning Device, Nanofiber, Heating Unit, Air Guide, Air Supply

Description

Spinning Pack with Multiple Nozzle for Electrospinning and Electrospinning Device comprising the same}

The present invention relates to an electrospinning multi-nozzle spinning pack and an electrospinning apparatus comprising the same. More specifically, an electrospinning multi-nozzle spinning pack including a plurality of spinning nozzles, in which a heating unit and an air guide are independently installed for each spinning nozzle, to further reduce the thickness of the fabric to be produced and increase the yield. The present invention relates to an electrospinning multi-nozzle spinning pack and an electrospinning apparatus including the same.

Electrospinning (Electrospinning) is a technique for producing a fine diameter fiber by spinning the fiber raw material solution in a charged state, recently used as a technology for producing nanometer-class fibers, and the research on this is being actively conducted. Fibers produced by electrospinning have a diameter ranging from micrometers to nanometers, which in turn exhibits completely new properties. For example, an increase in the ratio of the surface area to the volume, an improvement in surface functionality, and an improvement in mechanical properties including tension. These superior properties allow nanofibers to be used in many important applications. For example, the web composed of such nanofibers may be applied to various fields such as various filter materials, wound dressings, artificial supports, and the like as a porous membrane material.

Korean Patent Laid-Open Publication No. 2003-0077384, while spraying compressed air to the lower end of the spinning nozzle while discharging the polymer solution through the spinning nozzle is applied with a high voltage to collect the spinning fibers in a web state to the grounded collector at the bottom The manufacturing method of ultra-fine nanofiber web by the electro-blown spinning method is described. However, this method has a problem that the fibers discharged by the high pressure and high speed compressed air collide with the collector and bounce back, contaminating the nozzle. In addition, in the case of solution spinning, there is a high possibility that the fibers are embrittled by the recovery of the solvent, and the discharge amount decreases as the solvent is recovered, thereby reducing the yield.

On the other hand, in the case of molten electrospinning, the solvent is not recovered as compared to the solution electrospinning, and thus the fiber is relatively thick.In addition, due to the strong electric field, agglomerates are formed at the bottom of the spinning nozzle when the solution is discharged, so that the fiber is uniform in diameter. There is a problem that is difficult to manufacture. In particular, when multiple nozzles are configured, a problem may occur in that the stream spreads due to repulsion between charged filaments having the same polarity and may not be properly guided to the collector's accumulation point, and the distance between the nozzles is very short. A problem arises in which the filaments radiated from neighboring nozzles merge with each other.

The present invention has been made to solve the problems of the prior art as described above, an object of the present invention is to enable more and more thin filament can be stably radiated from the spinning nozzle to the collector, while increasing the discharge amount per unit time To provide a multi-nozzle spinning pack.

Another object of the present invention is to provide an electrospinning device capable of producing high quality ultra-fine nanofibers with high productivity.

Other objects, advantages and novel features of the invention will become more apparent from the following detailed description and preferred embodiments in conjunction with the accompanying drawings.

Electrospinning multi-nozzle spinning pack according to an embodiment of the present invention for achieving the above object is an electrospinning comprising a plurality of spinning nozzles are supplied with a high voltage is supplied to the polymer spinning liquid and discharged in the form of filament A multi-nozzle spinning pack, comprising: a plurality of heating units installed directly below each spinning nozzle to maintain a constant temperature of the spinning zone to promote fiberization; A plurality of air guides and a plurality of air guides are attached to each end of each heating unit individually in a tubular manner and guide the filaments coming out of the radiation zone by air in the direction in which the filaments are discharged. It relates to an electrospinning multi-nozzle spinning pack comprising an air supply for supplying.

Another aspect of the present invention for achieving the above object is a polymer supply for supplying a polymer spinning solution, a spin pack for discharging the polymer spinning liquid transported from the polymer supply, a collector for collecting the fibers discharged from the spinning pack, and a spinning pack An electrospinning apparatus comprising a high voltage generator for applying a voltage between a collector and a collector, wherein a spinning pack includes a plurality of spinning nozzles and is installed directly below each spinning nozzle to maintain a constant temperature in the spinning zone to promote fiberization. A plurality of heating units; Air supply for supplying air to a plurality of air guides and a plurality of air guides, which are attached tubularly, one at each end of each heating unit, and pull the filaments out of the radiation zone towards the collector by air in the direction of the collector The present invention relates to an electrospinning apparatus comprising an electrospinning multi-nozzle spinning pack comprising a portion.

In the case of electrospinning the polymer using the spin pack and the electrospinning device of the present invention, a plurality of nozzles can be arranged in the transverse direction or the longitudinal direction of the spin pack in a very narrow space, so that the productivity per unit time can be improved by electrospinning. It is possible to improve significantly, and by stably integrating the filament from the spinning nozzle to the collector, it is possible to prevent interference or fusion between adjacent filaments, thereby improving manufacturing processability. In addition, since the temperature of the spinning zone is kept constant by the heating unit attached to the spinning zone at the end of each spinning nozzle, the physical properties of the electrospun fibers can be controlled by controlling the phase stability of the polymer spinning liquid and the mechanical properties. Can improve.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, a detailed description of known general functions or configurations will be omitted.

The electrospinning multi-nozzle spinning pack according to an embodiment of the present invention is an electrospinning multi-nozzle spinning pack including a plurality of spinning nozzles to which a high voltage is applied to receive a polymer spinning solution and discharge the filament into a filament. A plurality of heating units installed directly below the spinning nozzle to maintain the temperature of the spinning zone to promote fiberization; Air supply for supplying air to a plurality of air guides and a plurality of air guides, which are attached tubularly to each end of each heating unit individually and guide the filament coming out of the radiation zone by air in the direction in which the filament is discharged. Contains wealth.

In the present invention, "directly below the radiation nozzle" does not necessarily mean physically downward, but includes all directions toward the collector, such as directly below, directly upward, horizontally or diagonally, of the spinning nozzle. to be.

Nanofibers that can be produced using the radiation pack of the present invention is a filter material, photochemical sensor material, carbon material such as carbon nanotube, electronic device material, biomedical material, tissue engineering material, drug delivery material, DNA It can be widely applied as a manufacturing base material and cosmetic material. For example, nanofibers have a very large surface area compared to their volume, so they show an excellent effect when applied to filters. When nanoconductive conductive polymers are made of nanofibers and coated on glass, they change the color of windows by detecting the amount of sunlight. can do. When the conductive nanofibers are used as electrolytes for lithium ion batteries, the size and weight of the conductive paper can be greatly reduced while preventing leakage of the electrolyte. In addition, if nanofibers are made of artificial proteins made similar to biological tissues, they can be used in the manufacture of bandages or artificial skins that are directly absorbed into the body as the wound heals.

First, FIG. 1 schematically illustrates an electrospinning multi-nozzle spinning pack according to one embodiment of the invention. The electrospinning multi-nozzle spinning pack according to one embodiment of the present invention is a plurality of spinning nozzles 10, 10 'and 10 ", through which polymer spinning liquid is discharged, directly under each spinning nozzle 10. Heating units 30, 30 'and 30 "installed to maintain a constant temperature in the spinning zone 20 to promote fibrosis, tubularly attached to the bottom of each heating unit 30 and end of each spinning nozzle Air guides 40, 40 'and 40 "for drawing the filaments discharged from the spinning zone of the air in the direction in which the filaments are radiated by the air, and an air supply unit 50 for supplying air to the plurality of air guides. .

The number of spinning nozzles constituting the spinning pack of one embodiment of the present invention may be arbitrarily determined in consideration of the prevention of electric field interference, the prevention of contact between the discharge streams, the available space of the spinning nozzles, and the like. The nozzles may be arranged in a row or in multiple rows of two or more rows. On the other hand, 2-500 mm is preferable and, as for the space | interval between spinning nozzles, 3-300 mm is more preferable.

In the general electrospinning method, fibers are produced by discharging a solution of several grams per hour (g) or less from one or a few nozzles, and in particular, nanofibers are produced by emitting very little spinning solution, so the production rate is very low and economic efficiency is low. There is a problem. However, according to the present invention, the filaments radiated from neighboring radiating nozzles can be stably radiated to the collector without being interfered with each other even if a plurality of radiating nozzles are placed close to each other. Can be.

In the spinning pack of the embodiment of the present invention, the plurality of spinning nozzles may be arranged in the horizontal direction or in the vertical direction, and may further be arranged upward. That is, the radiation pack of the present invention can be applied not only to the top-down radiator but also to the bottom-up or lateral radiator.

Each heating unit 30, 30 ′, 30 ″ is formed around each of the spinning nozzles directly below each of the plurality of spinning nozzles 10, 10 ′, 10 ″, and the filament discharged from the spinning nozzle The temperature of the spinneret is kept constant while it is integrated into the collector, promoting fiberization and stably inducing filaments. Solution electrospinning may have the effect of thinning the fiber as the solvent volatilizes. In the case of melt spinning, the thickness of the fiber can be finely adjusted by controlling the degree of crystallinity of the fiber in the method of controlling the thickness of the fiber. In particular, fast crystallization is difficult to control the thickness of the fiber, there is a problem that can not induce the whipping (whipping) motion. Therefore, maintaining a constant temperature near the melting temperature while integrating into the collector to slow down the crystallization rate and lower the viscosity to induce more whipping motion to make the fiber thinner will promote nanofiberization and improve the distribution of fibers. It is preferable to obtain stably.

The type of such heating units 30, 30 ', 30 "is not particularly limited, but may be rectangular or cylindrical, and electrically heated in a ceramic, tempered glass, or other electrically insulating inorganic housing. It may be implemented in a manner, or a method of heating with hot air in addition to the electrical manner may be employed.

In the present invention, the size of the heating units 30, 30 ', 30 "is not particularly limited, but, for example, the width may be in the range of 1 to 15 cm and the height may be in the range of 5 to 20 cm.

The temperature T _H of the radiation zone 20 maintained by the guide units 30, 30 ′, 30 ″ is within the range of the following equation (1).

T _m -15 ° C ≤ T _H ≤ T _m + 15 ° C

In Equation 1 above,
T _H is the temperature of the spinning zone,

T _m is the melting temperature of the spinning polymer.

The temperature (T _H ) of the spinneret is determined by the characteristics of the polymer to be spun, but when the temperature of the spinneret exceeds T _m + 15 ° C, thermal decomposition of the polymer occurs and the molecular weight decreases, which means This is easy to occur, on the contrary, if the temperature of the radiation zone is less than T _m -15 ° C, the heating unit may not operate properly, which may cause problems as in the prior art. That is, there is a problem that the thickness of the fiber is too thick or uneven and nanofiberization does not occur due to the inability or weakness of the whipping motion, it is difficult to spin in a desired direction, and the thickness of the web to be obtained after spinning is also feared to be manufactured in a thick form. have.

As an example, as shown in FIG. 2, heating units 330, 330 ′, 330 ″ for constantly adjusting the temperature of the spinning zone around each spinning nozzle 310, 310 ′, 310 ″ are provided. As configured independently or alternatively as shown in FIG. 3, the heating units form independent spinning zones around each spinning nozzle and regulate the temperature of such spinning zones, but the heating units themselves are connected to one another. It may be formed integrally.
The air guides 40, 40 ', 40 "can be made of engineering plastics such as fluorine-based polymers, polyether ether ketones, polyamide-based polymers such as nylon. The air guides 40, 40', 40" are spun In the zone 20, the fibers heated by the heating units 30, 30 ′, 30 ″ are pulled down into the desired radial direction by air, flowing smoothly down at the ends of the heating units 30, 30 ′, 30 ″. It may be configured to narrow down to form a gentle slanted slope. At this time, the angle (θ) in which the air guide is bent in the collector direction with respect to the horizontal plane may be in the range of 5 degrees to 80 degrees, and the length of the portion descending along the filament from which the air guide is radiated is in the range of about 0.5 to 7.5 cm. Can be.
The radiation pack of the present invention is a thermostat that regulates the temperature of the radiation zone 20 and the air in the air guides 40, 40 ', 40 "controlled by the heating units 30, 30', 30". It may further include (not shown). Such a thermostat may be installed independently of the heating unit and the air guide, or may be configured to control the temperature of the air in the heating unit and the air guide together when the heating unit is heated by the hot air heating method. Such a thermostat may include a sensor for sensing the temperature of the air and a control board for controlling the temperature of the air according to the sensed temperature. The temperature sensor may use any sensor used in the technical field to which the present invention belongs, such as a voltage meter, an ampere meter and a thermometer.

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The spinning nozzle 10 may be made of a material including a ceramic compound, a metal or a metal alloy, a polymer, a copolymer, or the like, but is not necessarily limited thereto.
The air supply unit 50 is connected to each air guide 30, 30 ′, 30 ″ mounted at the bottom of each heating unit 30, 30 ′, 30 ″ so that air can be delivered to the air guide. Supply the air to be injected. The flow rate of the air injected into the filament radiated by the air guide is 1 to 10,000 m / min, preferably 1 to 3,000 m / min, the temperature of the air is 350 ℃ at room temperature, preferably 150 ℃ at room temperature.

The spinning pack of the present invention can be used for both solution spinning and melt spinning, but in the case of melt spinning can provide a better effect. In general melt electrospinning, there is a limitation that the thickness of the fiber is thick, according to the present invention, the nanofibers can be made even thinner on the scale of several tens of nm to several hundreds nm by the melt electrospinning, and the air guide The amount of discharge can be increased because the filaments which are discharged from the spinning zone by the air injection and are pulled in the direction of the collector to discharge the filaments accumulated in the collector.

The electrospinning multi-nozzle spinning pack of the present invention is not necessarily limited to those applied to the electrospinning apparatus of the present invention, it is understood that it may be applied as a spinning means of a conventional electrospinning apparatus for producing nanofibers in an electrospinning manner. Should be.

Another aspect of the invention relates to an electrospinning apparatus. As shown in FIG. 4, the electrospinning device of the present invention is a polymer supply unit 100 for supplying a polymer spinning liquid, a spinning pack 300 for discharging a polymer spinning liquid transferred from the polymer supplying part, and a discharge from a spinning pack. And a high voltage generator 400 for applying a voltage between the spin pack and the collector. In the present invention, the spinning pack 300 includes a plurality of spinning nozzles (310, 310 ', 310 "), and are installed directly below each spinning nozzle, and the fiberization by maintaining a constant temperature of the spinning zone A plurality of heating units 330, 330 ′, 330 ″ to promote; A plurality of air guides (340, 340 ', 340 ”) and a plurality of air guides attached to the ends of each heating unit individually one by one and guided by pulling the filaments out of the radiation zone towards the collector by air It includes an air supply unit 350 for supplying air to the guides (340, 340 ', 340 ").

The spinning pack 300 includes a plurality of spinning nozzles 310, 310 ′, 310 ″. The number of spinning nozzles 310, 310 ′, 310 ″ constituting the spinning pack 300 or the spinning pack ( The number of 300) may be set in consideration of the size and thickness of the nanofiber web to be manufactured, production speed, and the like. In consideration of preventing electric field interference, preventing contact between discharge streams, available space of the spinning nozzle, and the like, the spacing between the spinning nozzles provided in the spinning pack 300 is preferably 2 to 500 mm, more preferably 3 to 300 mm.

In the electrospinning apparatus of the present invention, the radiation pack may have ten or more spinning nozzles arranged in a row or two or more rows, and a plurality of spinning nozzles may be arranged in a horizontal direction or a vertical direction.

In the present invention, the heating unit and the air guide are installed independently for each spinning nozzle, and can be implemented in various ways. As an example, as shown in FIG. 2, heating units 330, 330 ′, 330 ″ for constantly adjusting the temperature of the spinning zone around each spinning nozzle 310, 310 ′, 310 ″ are provided. As configured independently or alternatively as shown in FIG. 3, the heating units form independent spinning zones around each spinning nozzle and regulate the temperature of such spinning zones, but the heating units themselves are connected to one another. It may be formed integrally.

In the conventional electrospinning, only an electric field is formed between the spinning nozzle and the collector so that the nanofibers are radiated to form a nanofiber web, and thus it is difficult to control the thickness and the size of pores. However, in the present invention, rectangular heating units 330, 330 ′, 330 ″ made of an insulator which does not conduct current between the spinning nozzle and the collector are mounted, and ends of each heating unit 330, 330 ′, 330 ″ are mounted. Is equipped with air guides 340, 340 ', and 340 "for injecting hot air into the nanofibers emitted from the spinning nozzle. Therefore, the nanofibers are formed in the respective heating units 330, 330', and 330". The formed nanofibers may be guided by air flow generated at the ends of the heating units 330, 330 ′, and 330 ″ and collected in the collector 500 without damaging the fibers. In the present invention, the characteristics of the nanofibers can be controlled by adjusting the temperature of the heating unit, the flow rate of air in the air guide, the temperature of the air, and the like.

Each heating unit 330, 330 ′, 330 ″ is a rectangular or cylindrical chamber, and is heated by various methods such as an electrical method to help form nanofibers by maintaining a constant temperature of the spinning zone. The heating units 330, 330 ′, and 330 ″ may be made of a material such as ceramic, tempered glass, and electrically insulating inorganic material.

The air guides 340, 340 ′, and 340 ″ have a conical shape in which air of a predetermined temperature is injected to both sides of the lower ends of the heating units 330, 330 ′, and 330 ″, and the inner diameter of the pipe carrying the air is about 0.5 to about It may be in the range of 4 cm. The width of each heating unit 330, 330 ', 330 "is not particularly limited and can be adjusted according to the radiation conditions, but generally within the range of 1 to 15 cm, heating units 330, 330', 330 ”) is preferably within the range of 5 to 20 cm for stable fiberization.

The flow rate of air injected into the fiber spun by the air guide is 1 to 10,000 m / min, preferably 1 to 3,000 m / min, and the temperature of the air is 350 ° C. at room temperature, preferably 150 ° C. at room temperature. The inner diameter of the tube carrying the air may be in the range of about 0.5 to about 4 cm.

The electrospinning apparatus of the present invention controls the temperature of the radiation zone controlled by the heating units 330, 330 ', 330 "and the temperature of the air in the air guides 340, 340', 340" (not shown). C) may be further included. The thermostat may be installed independently of the heating unit and the air guide, or may be configured to control the temperature of the air in the heating unit and the air guide together when the heating unit is heated by the hot air heating method. Such a thermostat may include a sensor for sensing the temperature of the air and a control board for controlling the temperature of the air according to the sensed temperature. The temperature sensor may use any sensor used in the technical field to which the present invention belongs, such as a voltage meter, an amphere meter, a thermometer, and the like.

The polymer supply part 100 is a part which is supplied with a polymer material, which is a fiber raw material, is dissolved in a solvent or phase-changed into a melt, and is used for quantitatively supplying the spinning solution storage unit 130 and the polymer spinning solution toward the spinning pack 300. It is configured to include a metering pump 150.

The materials of the spinning nozzles 310, 310 'and 310 "include polypropylene, polyethylene, polyvinylidene fluoride, fluorine-based polymers such as polytetrafluoroethylene, polyether ether ketones, and polyamide-based polymers such as nylon. Chemical resistant engineering plastics are employed and alternatively corrosion resistant metals such as stainless steel (SUS) may be employed. Spinning nozzles 310, 310 ′, 310 ″ may be long cones or rods. The diameter of the fiber of the present invention can be adjusted by adjusting various states including the size of the micropores formed in the nozzles 310, 310 ', 310 ".

 Polymeric materials usable in the present invention include polymer solutions, polymer melts, dissolved glass materials, and mixtures thereof. Non-limiting examples of representative polymers usable in the present invention include fluoropolymers, polyolefins, polyimides, polylactides, polyesters, polycaprolactones, polyvinylidene fluorides, polyacrylonitriles, polysulfones, polyimides, polyethylenes Oxides, and these may be used alone or in a mixture of two or more thereof. In addition, in the present invention, other additives may be added to the polymer solution or the molten polymer in order to improve physical properties.

In the present invention, the high voltage generator 400 is installed to be immersed in the polymer spinning liquid to charge the polymer spinning liquid when voltage is applied. Preferably, the voltage applied to the high voltage generator is in the range of 10 to 100 kV, which is suitable for nanometer radiation.

The fibers discharged from the spin pack 300 are collected in the charged collector 500. The collector 500 is grounded, or is applied with a voltage of opposite polarity (or ground) to the polarity of the voltage applied to the radiation pack 300 side, and, for example, of the radiation pack 300 by a conveyor belt through a conveying means such as a roller. It is preferred to configure the feed end continuously. As a material of the collector 500, a metal plate having excellent conductivity is preferably used. In addition, various kinds of conductive materials may be employed.

The distance between the ends of the spinning nozzles 310, 310 ′, 310 ″ and the collector 500 is preferably set to 1 to 25 cm, more preferably 5 to 20 cm, with respect to the collector 500, thereby extending the filament. Make sure that an appropriate electric field is formed.

The electrospinning device of the present invention may be adapted to be suitable for a top-down, bottom-up, or transverse electric system, with bottom-up being more preferable in terms of mass production. As shown in FIG. 5, the electrospinning device of the present invention may be implemented as a lateral electrospinning apparatus in which the spinning nozzle and the collector are disposed in the horizontal direction to radiate in the lateral direction. In the case of the lateral electrospinning apparatus, it is possible to prevent the droplets of the spinning stock solution from contaminating the substrate.

Next, the operation of the electrospinning apparatus according to the present invention configured as described above is as follows. First, when the polymer spinning solution, which is a raw material, is supplied from the polymer supply unit 100 toward the spinning pack 300, the polymer spinning solution is charged through the high voltage generator 400 configured in the spinning pack 300.

The polymer spinning solution of the polymer supply part 100 is discharged through the spinning nozzles 310, 310 ', 310 "of the insulated and high voltage applied spinneret. The spinning nozzles 310, 310', 310" have a polymer on top. The spinning liquid enters and radiates while passing through a capillary formed at the end. Since the plurality of spinning nozzles 310, 310 ′ and 310 ″ are arranged in a row at regular intervals, a plurality of spinning nozzles 310 and 310 are disposed. 310 ") to spin the nanofibers. Charged spinning liquid is discharged toward the collector 500 below in the form of fine filaments while passing through the capillaries of the spinning nozzles 310, 310 ′ and 310 ″.

At this time, due to the strong electric field formed between the collector 500 and the charged filament, the filament is stretched and radiated to a nano-grade diameter. In the present invention, the charged filament discharged from the spinning nozzle passes through the spinning zone in which the temperature is constantly controlled by the heating units 330, 330 ', and 330'. In this process, fiberization is stably achieved. Air is supplied from the air supply unit 350 to the air guides 340, 340 ', and 340 "positioned at the ends of each heating unit 330, 330', and 330". Heating units 330, 330 ', Air at a predetermined temperature and pressure is injected to the filaments passing through the 330 ”through the 330” and stably in the collector 500 while pulling the filament in the direction of the collector. Focus.

Although the above has been described in detail with reference to a preferred embodiment of the present invention, this description is merely to describe and disclose an exemplary embodiment of the present invention. Those skilled in the art will readily recognize that various changes, modifications and variations can be made from the above description and the accompanying drawings without departing from the scope and spirit of the invention.

1 is a schematic cross-sectional view showing an electrospinning multi-nozzle spinning pack according to one embodiment of the invention.

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Figure 2 is a schematic perspective view showing an electrospinning multi-nozzle spinning pack according to one embodiment of the present invention.

Figure 3 is a schematic perspective view showing an electrospinning multi-nozzle spinning pack according to another embodiment of the present invention.

4 is a schematic cross-sectional view showing an electrospinning apparatus including a multi-nozzle spinning pack according to one embodiment of the present invention.

5 is a schematic cross-sectional view showing an electrospinning apparatus including a multi-nozzle spinning pack according to another embodiment of the present invention.

* Description of the symbols for the main parts of the drawings *

10: spinning nozzle 20: spinning zone

30: heating unit 40: air guide

100: polymer supply unit 130: spinning liquid storage unit

150: metering pump 300: spinning pack
310: spinning nozzle 330: heating unit

340: air guide

400: high voltage generator 500: collector

Claims (17)

A molten electrospinning multi-nozzle spinning pack comprising a plurality of spinning nozzles to be supplied with a polymer spinning liquid and discharged in a filament form to which a high voltage is applied, A plurality of insulating heating units installed directly below each spinning nozzle to maintain the temperature T _H of the spinning zone of Equation 1 below to promote fiberization; A plurality of air guides attached tubularly, one at each end of each heating unit, to guide the filaments exiting the radiation zone by air in the direction in which the filaments are discharged; And an air supply for supplying air to the plurality of air guides. Equation 1 T _m -15 ≤ T _H ≤ T _m + 15 In Equation 1 above, T _H is the temperature of the spinning zone, T _m is the melting temperature of the spinning polymer. delete delete delete delete delete delete delete A polymer supply for supplying the polymer spinning solution, a spin pack for discharging the polymer spinning liquid transported from the polymer supply, a collector for collecting the fibers discharged from the spinning pack, and a high voltage generator for applying a voltage between the spin pack and the collector In the electrospinning apparatus, A plurality of insulating heating units including a plurality of spinning nozzles, installed directly under each spinning nozzle to maintain a constant temperature H _T of the spinning zone of Equation 1 below to promote fiberization; A plurality of air guides attached tubularly to the ends of the insulated heating unit and guides the filaments out of the radiation zone by the air and towards the collector in the direction of the collector; An electrospinning apparatus comprising a multi-nozzle spinning pack for molten electrospinning comprising an air supply for supplying air to a plurality of air guides. Equation 1 T _m -15 ≤ T _H ≤ T _m + 15 In Equation 1 above, T _H is the temperature of the spinning zone, T _m is the melting temperature of the spinning polymer. delete delete delete delete delete delete delete delete

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