KR101811656B1 - Nanofiber manufacturing apparatus and nanofiber manufacturing method using the same - Google Patents

Abstract

The present invention relates to a nanofiber manufacturing apparatus and a method of manufacturing nanofibers. The present invention relates to a method for manufacturing a nanofiber separation membrane by manufacturing a nanofiber web by rotating a substrate, a base material or a fabric on which a nanofiber web is laminated, by continuously and downwardly and downwardly electrospinning the same surface continuously, Can be saved.

Description

TECHNICAL FIELD [0001] The present invention relates to a nanofiber manufacturing apparatus and nanofiber manufacturing method,

The present invention relates to a nanofiber manufacturing apparatus and a method of manufacturing nanofibers.

In recent years, miniaturization, thinning, light weight, and the like of electronic devices have been made rapidly and rapidly, and batteries that supply electric power in accordance with this tendency are also required to have high performance.

A lithium secondary battery is the battery best suited to such a demand, and the lithium secondary battery comprises an anode, a cathode, an electrolyte, and a separator.

Here, in the anode, the cathode active material is a material capable of occluding and releasing lithium, and a composite metal oxide such as lithium cobalt oxide, lithium manganese oxide, lithium nickel cobalt oxide, and lithium iron phosphate oxide is mainly used.

In the negative electrode, the negative electrode active material is a lithium alloy, carbon, cokes, activated carbon, graphite, silicon (Si), tin (Sn), or the like capable of intercalating and deintercalating lithium Metals and / or alloys are mainly used.

LiCF4, LiCF3SO3, LiAsF6, LiBF4, LiPF6, LiSCN, LiC (CF3SO2) 3, LiBOB and the like are used as the lithium salt. Examples of the organic solvent include ethylene carbonate (EC), propylene carbonate (PC), dimethyl carbonate (DMC), dimethoxyethane (DME), diethoxyethane (DEE), 2- Respectively.

The separation membrane prevents internal short-circuiting caused by the contact between the anode and the cathode of the lithium secondary battery and transmits ions. The separation membrane that is currently used is polyethylene (PE), polypropylene (PP), or polyethylene Polypropylene composite membranes are used, but this can cause stability problems in secondary batteries due to thermal instability.

In recent years, attempts have been made to improve the thermal stability by preparing a separator used for a secondary battery in a multilayer structure. One of them is a porous nanofiber web and a method for manufacturing the same, And a nanofiber web were respectively formed and combined. However, the above-mentioned method has a problem in that the manufacturing process is complicated and the time consumed is long since the electrospinning process is carried out twice in the process of making the two-layered nanofiber web.

In addition, when the nanofibers are manufactured by the conventional bottom-up electrospinning device, there is a problem that the production speed and production amount are lowered according to the bottom-up type.

In addition, in the case of a technique for spinning conventional nanofibers, since it is limited to a small-scale working line focused on a laboratory, there is a demand for a technique of spinning nanofibers by dividing a spinning zone and using a unit concept.

SUMMARY OF THE INVENTION The present invention has been conceived in order to solve the above-mentioned problems, and it is an object of the present invention to provide a spinning device, in which a bottom-up electrospinning device and a top- To provide a nanofiber web manufacturing apparatus capable of continuously stacking nanofiber webs on one side of a bottom-up electrospinning apparatus and capable of mass production of a high-quality nanofiber web production and a bottom- do.

SUMMARY OF THE INVENTION The present invention has been conceived to solve the problems described above, and it is an object of the present invention to provide a bottom-up electrospinning apparatus for producing a first nanofiber web by electrospinning a polymer spinning solution on a support, A rotating device for rotating the rotating member by 180 degrees to the upper surface; And a top-down electrospinning device in which nozzles are directed from the top to the bottom and electroluminescence of a different type of polymer spinning solution used in the bottom-up electrospinning device is applied to the first nanofiber web to laminate the second nanofiber webs; And the top-down electrospinning device, the rotating device, and the top-down electrospinning device are arranged in this order. The apparatus for manufacturing nanofibers is characterized in that a bottom-up electrospinning device and a top-down electrospinning device are continuously arranged in a U-direction with respect to a horizontal direction, a vertical direction, or a horizontal direction, And a laminating device for laminating a support on which the nanofiber web and the second nanofiber web are laminated. The bottom-up electrospinning device and the top-down electrospinning device may further include a temperature control device for controlling the temperature of the polymer spinning solution.

According to another embodiment of the present invention, there is provided a method of preparing a nanofiber, comprising the steps of: preparing a support; electrospinning a first polymer spinning solution with a bottom-up electrospinning device on a lower surface of the support to form a first nanofiber web; The support having the web laminated thereon passes through the rotating device and the lower surface is rotated 180 degrees to the upper surface; a step of electrospinning the second polymer spinning solution with the top-down electrospinning device on the first nanofiber web laminated on the support Continuously forming a second nanofiber web; And a step of winding a support on which the first and second nanofiber webs are successively laminated, wherein the first polymer spinning solution and the second polymer spinning solution are not the same and are different kinds of nanofibers Of the present invention. Wherein the first and second nanofiber webs are different in basis weight on the same plane in the longitudinal direction or the width direction of the support body, Further comprising the step of laminating a support on which the first nanofiber web and the second nanofiber web are laminated after the successive lamination. The first and second polymer spinning solutions may be electrospun through a temperature controller at a temperature of 50 to 100 ° C.

As described above, according to the present invention having the above-described structure, the support on which the nanofiber web is laminated is rotated to continuously produce a nanofiber web by the bottom-up and bottom-down electrospinning apparatus continuously on the same surface, The process can be simplified and the manufacturing time can be reduced.

In addition, since the rotating device for rotating the support is installed between the electrospinning devices, the space utilization of the electrospinning device can be installed in a horizontally or vertically arranged layered structure on the plane, It is easy and at the same time, there is a margin in the installation space. In other words, it is possible to install and operate an electrospinning device in a narrow space, and it is possible to mass-produce nanofiber webs.

1 is a side view schematically showing an apparatus for producing nanofibers according to the present invention,
2 is a plan view schematically showing a nozzle block installed in each electrospinning device of the nanofiber manufacturing apparatus of the present invention,
3 is a front sectional view schematically showing a state in which a heating wire for temperature control is installed in a nozzle block installed in each electrospinning device of the nanofiber manufacturing apparatus of the present invention,
4 is a sectional view taken along the line A-A 'in Fig. 3,
5 and 6 are cross-sectional views schematically showing a flip device used as an embodiment of a rotating device of a nanofiber manufacturing apparatus of the present invention,
7 is a plan view showing a state in which the tube body of the nozzle block of the present invention is turned on and off in the CD direction,
FIG. 8 is a plan view showing a process of electrospinning of a nozzle in a nozzle block, as shown in FIG. 7,
FIG. 9 is a plan view showing a process of electrospinning of a nozzle in a nozzle block in the nozzle block according to an embodiment of the present invention,
10 is a side view schematically showing the arrangement of the apparatus for producing nanofibers of the present invention in the vertical direction,
Fig. 11 is a bird's-eye view schematically showing the arrangement of a case where the apparatus for producing nanofibers of the present invention is arranged in a U-shape with respect to the horizontal direction.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The present invention is not limited to the scope of the present invention, but is merely an example, and various modifications can be made without departing from the technical spirit of the present invention.

2 is a plan view schematically showing a nozzle block installed in each electrospinning apparatus of the nanofiber manufacturing apparatus of the present invention. FIG. 3 is a cross- FIG. 4 is a cross-sectional view taken along the line A-A 'in FIG. 3, and FIGS. 5 and 6 are schematic cross- 6 is a cross-sectional view schematically showing a flip device 20-1, which is one embodiment of a rotating device 20 used in the nanofiber manufacturing apparatus of the present invention, and FIG. 7 is a cross- FIG. 8 is a plan view showing the process of the electrospinning of the nozzles in the nozzle block as shown in FIG. And FIG. 9 is a plan view showing a working process of the electrospinning of the nozzles in the nozzle block in the nozzle block according to the present invention, And FIG. 11 is a bird's-eye view schematically showing a layout of a case where the apparatus for producing nanofibers of the present invention is arranged in a U-shape with respect to the horizontal direction.

As shown in the drawing, an apparatus 1 for manufacturing nanofibers according to the present invention includes a bottom-up electrospinning device 10 and a top-down electrospinning device 30, The top-down electrospinning device 30 is arranged at a predetermined interval.

The bottom-up electrospinning device 10 and the top-down electrospinning device 30 are arranged to discharge the polymer solution in the spinning solution main tanks 11 and 31 filled with a polymer spinning solution (not shown) A nozzle block 13,33 in which a plurality of nozzles 15,35 are arranged and a nozzle block 15,35 positioned in the upper end of the nozzle 15,35 in the case of a bottom-up electrospinning device and the bottom of the nozzle 15,35 in the case of a top- (17, 37) spaced apart from the nozzles (15, 35) in order to accumulate the polymer spinning solution to be injected, and a voltage generating device (14) for generating a voltage in the collectors .

According to the structure as described above, the nanofiber manufacturing apparatus 1 according to the present invention is characterized in that the nanofiber manufacturing apparatus 1 according to the present invention comprises a spinning solution The polymer spinning solution supplied continuously and quantitatively in the plurality of nozzles 15 and 35 to which a high voltage is applied through the metering pump is supplied to the nozzles 15 and 35 through the nozzles 15 and 35, And is then radiated and focused on the collectors 17 and 37 to form a nanofiber web, and the formed nanofiber is embossed or needle punched into a nonwoven fabric.

On the other hand, the nozzle blocks 13 and 33 in which the nozzles 15 and 35 are disposed in the respective electrospinning devices are provided with a temperature control device 60 in each tube 112. That is, in order to adjust the temperature of the polymer spinning solution in the tubular body of the nozzle blocks 13 and 33 provided in the respective electrospinning devices 10 and 30 and supplied with the polymer spinning solution by the plurality of nozzles 15 and 35, A temperature control device is provided. Here, the flow of the polymer spinning solution in the nozzle blocks 13 and 33 is supplied from the spinning liquid main tanks 11 and 31 in which the polymer spinning solution is stored to each tube through a spinning solution flow pipe (not shown). The polymer spinning solution supplied to each tube is radiated and discharged through a plurality of nozzles 15 and 35, and is accumulated on the support 3 in the form of a nanofiber web. At this time, the plurality of nozzles (15, 35), which are spaced apart from each other at a predetermined interval in the longitudinal direction, are mounted on the tubular body in a state of being electrically connected and electrically connected. Here, the temperature controller 60 is provided in the shape of a heat ray 113 on the inner circumference of the tube to control the temperature control of the polymer solution for supplying and flowing into the tubes. 3 to 5, a temperature regulating device 60 composed of a hot wire is formed on the periphery of the inside of the tubular body of the nozzle blocks 13 and 33 in a spiral manner on the inner circumference of the tubular body of the nozzle blocks 13 and 33 Thereby controlling the temperature of the polymer spinning solution supplied and introduced into the tubular body. In the present invention, it is common to spin at room temperature, but it is also possible to spin at a high temperature, preferably 50 to 100 ° C.

In an embodiment of the present invention, a temperature regulating device 60 consisting of a hot line is spirally arranged on the inner circumference of the tubular body of the nozzle blocks 13 and 33. However, the temperature regulating device 60 is formed in a hot line shape, The temperature regulating device 60 may be formed in a substantially C-shaped plate-like shape. The temperature regulating device 60 may be formed in a substantially C-shaped plate shape, To control the temperature of the polymer spinning solution.

Meanwhile, a bottom-up electrospinning device 10 is disposed at a front end of the nanofiber manufacturing apparatus 1, a bottom-down electrospinning device 30 is disposed at a rear end thereof, a polymer spinning solution is injected from each electrospinning device, A winding roller 9 for winding a support 3 on which nanofibers are laminated is provided at the rear end of the nanofiber manufacturing apparatus 1 Respectively.

The support 3 on which the polymer spinning solution of the bottom-up electrospinning device 10 and the top-down electrospinning device 30 are laminated is preferably made of nonwoven fabric or fabric, but not limited thereto, Or it can be used directly as a fabric.

At this time, the bottom-up electrospinning device 10 and the top-down electrospinning device 30 are arranged symmetrically with respect to the collectors 17 and 37 in the upward and downward directions, respectively. That is, in the bottom-up electrospinning device 10, the collector 17 is located at the top of the nozzle 15, and the bottom-up electrospinning device 30 is located at the bottom of the nozzle 35.

On both sides of the collectors 17 and 37, conveying rollers 7 are provided and the nano-fibers are stacked on the respective collectors 17 and 37 via the conveying rollers 7, (3) is transported in the horizontal direction. The nanofibers produced by stacking the polymer spinning solution injected from the nozzles 15 of the bottom-up electrospinning device 10 on the support 3 of the collector 17 are injected into the collector of the top-down electrospinning device 30 (37), and conveying rollers (7) for repeatedly and continuously advancing the above process are provided at both ends of the respective collectors (17, 37).

In the meantime, the present invention is characterized in that a rotating device 20 is provided between the bottom-up electrospinning device 10 and the top-down electrospinning device 30. The rotating device 20 is disposed between the electrospinning devices and rotates the supporting body 3 by 180 degrees so that the upper surface of the support body is rotated to the lower surface and the lower surface is rotated to the upper surface to be.

5 and 6 are cross-sectional views schematically showing a flip device 20-1 used as an embodiment of a rotating device. 5 is a cross-sectional view showing an initial operation of the flip device 20-1, and FIG. 6 is a cross-sectional view showing a process of the flip device 20-1 in the latter stage of operation.

The flip device 20-1 used as an embodiment of the rotating device is formed as a cylindrical body having a hollow inside and is provided at its central portion with both ends of the support 3 inserted in the horizontal both- Left and right guide members 21 and 21 'having guide grooves are formed so as to protrude inwardly. At this time, the left guide member 21 of the left and right guide members 21 and 21 'formed to protrude inwardly from the inner periphery of the flip device 20-1 is formed to extend upward along the inner periphery, And the right guide member 21 'is formed to extend downward along the inner circumference and then to extend upwardly again so as to extend in the direction of the spiral, So as to be positioned at the initial position and direction of the left guide member 21.

One end and the other end of the support inserted into the respective guide grooves 22 and 22 'of the left and right guide members protruding inwardly from the inner periphery of the flip device 20-1 by the above- The upper and lower surfaces of the support body 3 are reversed by rotating the inner circumference of the flip device 20-1 helically while facing the left and right guide members 21 and 21 '

In the present invention, the flip device 20-1 is used as the rotating device 20 for rotating the electrospun nanofibrous web 180 degrees between the electrospinning devices. However, the present invention is not limited to this, It is also possible to use an apparatus which rotates by 90 degrees in the advancing direction of the support by a device or a torsion roller.

The polymer spinning solution filled in the spinning solution main tank 11 of the bottom-up type electric device 10 is sprayed onto the support 3 of the collector 17 through the nozzle 15, The supporting body 3 on which the nanofiber webs are laminated after the polymer spinning solution injected onto the support 3 of the collector 17 is accumulated is formed on the support body 3 of the collector 17 by the rotation device 20, The lower surface of the support 3 on which the web is laminated is rotated 180 degrees to the upper surface. And then transferred onto the collector 37 of the top down electrospinning device 30 through the transport roller 7 and onto the support 3 on which the nanofibers transferred onto the collector 37 are laminated, The polymer spinning liquid filled in the spinning liquid main tank 31 of the spinning apparatus 30 is electrospun through the nozzle 35, and the above-described process is continuously and repeatedly performed to produce the final product.

The nanofibers produced while passing through the bottom-up electrospinning apparatus 10, the rotating apparatus 20 and the top-down electrospinning apparatus 30 of the nanofiber manufacturing apparatus 1 according to the present invention by the above- 3 is sprayed to the polymeric spinning solution through the respective nozzles 15 and 35 of the bottom-up electrospinning device 10 and the top-down electrospinning device 30 to form nano particles on one surface of the support 3 on the collectors 17 and 37 The polymeric spinning solution injected from the nozzles 15 and 35 of the bottom-up electrospinning device 10 and the top-down electrospinning device 30 such as the fiber webs are continuously laminated, and the nanofiber web is formed into a plurality of layers Nanofiber products are manufactured.

According to an embodiment of the present invention, the voltage of the bottom-up electrospinning device is higher than the voltage of the bottom-up electrospinning device so that the diameter of the nanofibrous web produced by the bottom- It is possible to make the nanofibrous web narrower than the diameter of the nanofibrous web produced by the method.

Meanwhile, it is possible to fill the spinning liquid main tanks 11 and 31 of the bottom-up electrospinning device 10 and the bottom-up electrospinning device 30 with the same type of polymer spinning solution, The nanofibers produced through the nanofiber manufacturing apparatus 1 can be manufactured in various ways according to their characteristics.

However, in the present invention, the polymer solution used in the bottom-up electrospinning device 10 and the polymer solution injected in the top-down electrospinning device 30 are made of different types of polymer solution.

Here, the polymer spinning solution is not particularly limited, and examples thereof include polypropylene (PP), polyethylene terephthalate (PET), polyvinylidene fluoride, nylon, polyvinylacetate, polymethylmethacrylate, (PAN), polyurethane (PUR), polybutylene terephthalate (PBT), polyvinyl butyral, polyvinyl chloride, polyethyleneimine, polyolefin, polylactic acid (PLA), polyvinyl acetate (PEN), polyamide (PA), polyvinyl alcohol (PVA), polyethyleneimide (PEI), polycaprolactone (PCL), polylactic acid glyceric acid (PLGA), silk, cellulose and chitosan. (PP) materials and heat-resistant polymer materials such as polyamide, polyimide, polyamideimide, poly (meta-phenylene isophthalamide), polysulfone, polyether ketone, polyether Aromatic polyesters such as polyethylene terephthalate, polyethylene terephthalate and polyethylene naphthalate, polytetrafluoroethylene, polydiphenoxaphospazene, polybis [2- (2-methoxyethoxy) phosphazene] , A polyurethane copolymer including polyurethane and polyether urethane, cellulose acetate, cellulose acetate butyrate, cellulose acetate propionate, and the like, are preferably used in a commercial manner.

The polymer spinning solution is a solution prepared by dissolving a polymer, which is a synthetic resin material capable of electrospinning, in a suitable solvent, and the type of solvent is not limited as long as it can dissolve the polymer. For example, methyl, ethyl, propyl, isopropyl, n-butyl, isobutyl, isopropyl, n-butyl, isobutyl, sec-butyl, Isobutyl alcohol, isopropyl alcohol, methyl alcohol, ethanol, aliphatic compounds such as hexane, tetrachlorethylene, acetone, and glycol groups such as propylene glycol, diethylene glycol, isobutyl ketone, methyl ethyl ketone, aliphatic hydroxyl group, m- Ethylene glycol, and halogen compounds such as trichlorethylene, dichloromethane, aromatic compounds toluene, xylene, alicyclic compounds such as cyclohexanone, cyclohexane and esters such as n-butyl acetate, ethyl acetate, aliphatic ether Butyl cellosolve, acetic acid 2-ethoxy ethanol, 2-ethoxy ethanol, amide dimethyl formamide, dimethylacetamide, etc. And, it is possible to use a mixture of a plurality kinds of solvents. The polymer spinning solution preferably contains, but is not limited to, an additive such as a conductivity improver.

The polymeric spinning solution filled in the spinning liquid main tank 11 of the bottom-up electrospinning device 10 and the polymer spinning solution filled in the spinning solution main tank 31 of the top-down electrospinning device 30 And the types are different from each other.

Each of the nozzle blocks 13 and 33 of the present invention includes a tubular body 112a, 112b, 112c, 112d, 112e, 112f, 112g, 112h and 112i having a plurality of nozzles 15, 112b, 112c, 112d, 112e, 112f, 112g, 112h, 112i are connected to the spinning liquid main tanks 11, 31 And the polymer spinning solution filled in the spinning solution main tanks 11 and 31 is supplied.

Here, the tubes 112a, 112b, 112c, 112d, 112e, 112f, 112g, 112h, 112i are connected to the spinning liquid main tanks 11, 31 by a supply pipe (not shown) Is branched into a plurality of tubes to connect the tubular bodies 112a, 112b, 112c, 112d, 112e, 112f, 112g, 112h, 112i and the spinning liquid main tanks 11,

At this time, a supply pipe adjusting means (not shown) is provided in the supply piping which is communicated to the tubes 112a, 112b, 112c, 112d, 112e, 112f, 112g, 112h, 112i in the spinning liquid main tanks 11, Wherein the supply amount adjusting means is constituted by a valve.

In this way, valves are respectively provided in the supply liquid piping leading to the tubular bodies 112a, 112b, 112c, 112d, 112e, 112f, 112g, 112h, 112i in the spinning liquid main tanks 11, 31, By the on-off system in which supply of the polymer solution to be supplied to the tubes 112a, 112b, 112c, 112d, 112e, 112f, 112g, 112h, 112i in the spinning liquid main tanks 11, Respectively.

That is, when the polymer solution is supplied from the spinning solution main tanks 11 and 31 to the tubes 112a, 112b, 112c, 112d, 112e, 112f, 112g, 112h and 112i through the supply pipe, The nozzle blocks 13 and 33 are opened and closed by the valves provided in the supply pipes for supplying the tubes 11 and 31 and the tubes 112a, 112b, 112c, 112d, 112e, 112f, 112g, 112h and 112i. 112b, 112d, 112f, 112g, 112h, and 112i of the tubular bodies 112a, 112b, 112c, 112d, 112e, 112f, 112g, 112h, 112b, 112c, 112d, 112e, 112f, 112g, 112h, 112i in the spinning liquid main tanks 11, 13 by opening and closing of the valves 212, 213, 214, The supply of the polymer spinning solution to be supplied is controlled and controlled.

By using the structure as described above, the waste liquid main tanks 11 and 31 and the tubes 112a, 112b, 112c, 112d, 112e, 112f, 112g, 112h and 112i are provided, Valves are provided for supplying the polymer solution to the tubes 112a, 112b, 112c, 112d, 112e, 112f, 112g, 112h, 112i in the spinning liquid main tanks 11, 112d, 112f, 112g, 112h, 112i, 112f, 112g, 112h, 112i of the tubes 112a, 112b, 112c, 112d, 112e, 112f, 112g, 112h, 112i arranged in the nozzle blocks 13, The supply of the polymer spinning solution is only supplied to the tubes 112a, 112c and 112e at specific positions in the tubular body arranged in the nozzle blocks 13 and 33 by closing the specific valve, 112b, 112c, 112d, 112e, 112f, 112g, 112h, 112i from the spinning liquid main tanks 11, Is regulated and controlled.

That is, each of the nozzles 15 and 35 provided in the supply pipe and the pipes 112a, 112b, 112c, 112d, 112e, 112f, 112g, 112h and 112i is spoken, As shown in FIG.

The radiation amount regulating means is constituted by a valve. In this way, the supply of the polymer spinning solution supplied to the nozzles 15 and 35 from the supply pipe by the opening and closing of the valve is individually controlled by the valve being provided as the radiation amount adjusting means, Preferably, the opening and closing of the valve is automatically controlled by the control unit, but it is also possible that the opening and closing of the valve are manually controlled according to the situation of the field and the operator's request.

In the present invention, if the amount of the spinning solution of the polymer spinning solution is easily controlled and controlled after the spinning amount control means is provided as a valve but is supplied to the nozzles 15 and 35 in the supply pipe, But is not limited thereto.

In the present invention, a valve is provided in the supply piping so that the tubes 112, 112b, 112c, 112d, 112e, 112f, 112g, 112h, 112i of the nozzle blocks 13, 33 in the spinning liquid main tanks 11, And a valve is provided in the supply pipe to supply a supply amount of the polymer solution for the respective nozzles supplied from the tubes 112a, 112b, 112c, 112d, 112e, 112f, 112g, 112h, 112i, 112b, 112c, 112d, 112e, 112f, 112g, 112h, 112i of the tubular body 112a, 112b, 112c, 112d, 112h, 112i by controlling and controlling the radiation amount of the polymer solution, A nano-fiber web having different polymer types or basis weights is laminated in the width direction or the longitudinal direction of the support 3 by an electrospinning polymer spinning solution.

The nanofiber web produced according to the present invention is characterized in that it has a different basis weight in the width direction, that is, in the CD direction or in the transverse direction, or is electrospun and laminated in the longitudinal direction, that is, in the MD direction. The CD direction is the cross direction, which means the direction perpendicular to the MD direction (Machine Direction). The MD direction is the longitudinal direction / longitudinal direction, and the CD direction is the width direction / transverse direction.

Basis Weight or Grammage, on the other hand, is defined as the mass per unit area, that is, the preferred unit, grams per square meter (g / m 2).

7 is a plan view showing a state in which the nozzles 15 and 35 in the electrospinning apparatus according to the present invention are turned on and off in the CD direction and Fig. 8 is a cross- As described above, the operation of the nozzle in the electrospinning device is electrically turned on and off so that the nanofiber web having a different type or basis weight of the polymer spinning solution in the CD direction . 9 is a plan view showing a state in which the nozzles in each electrospinning apparatus of the present invention are turned on and off in the MD direction. As described above, the operation of the nozzles in the electrospinning apparatus is electrically turned on and off, It is possible to form a nanofiber web different in kind or basis weight.

A laminating apparatus 50 for laminating a nanofiber web and a support 3 made through the bottom-up electrospinning apparatus 10 and the top-down electrospinning apparatus 30 constituting the nanofiber manufacturing apparatus of the present invention, The laminating apparatus 50 is located at the rear end of the apparatus 1 for manufacturing nanofibers according to the present invention and performs post-processing.

The bottom-up electrospinning apparatus 10 and the top-down electrospinning apparatus 30 constituting the nanofiber manufacturing apparatus 1 may be arranged in parallel to one another in the horizontal direction, or may be arranged in a vertical direction Or the respective electrospinning devices are arranged in the U direction in the same layer. The fact that they can be arranged in the vertical direction for each layer or in the U direction in the same layer has the advantage that the productivity can be increased in a limited area.

That is, the rotary device is characterized in that the support rotates 180 degrees or vertically rotates in the U-turn direction by the flip device.

In one embodiment of the present invention, a laminating device 50 is provided at the rear end of the nanofiber manufacturing apparatus 1, and is fabricated through the bottom-up electrospinning device 10 and the top-down electrospinning device 30, (Not shown) for supplying a base material (not shown) to the lower side of the laminating apparatus 50, and a base material (not shown) supplied through the supply roller is provided on the lower side of the laminating apparatus 50. [ The nanofiber web is directly electrified and laminated, and the laminate is laminated in multiple layers through the laminating device 50.

The laminating device 50 is provided with a supply roller for supplying another substrate (not shown) on the upper side of the laminating device 50 to laminate the base material on the support 3 on which the nano- Layer laminate.

Hereinafter, the operation of the apparatus for manufacturing nanofibers according to the present invention will be described.

First, the support 3 is supplied to the bottom-up electrospinning apparatus 10 through the feed roller 5 provided at the tip of the nanofiber manufacturing apparatus 1 according to the present invention. At this time, it is preferable that the support 3 is made of a nonwoven fabric or a fabric, but it is not limited thereto, and it is possible to use the support 3 as a substrate or a fabric.

On the other hand, the support 3 fed to the bottom-up electrospinning apparatus 10 through the feed roller 5 is positioned on the lower surface of the collector 17. At this time, a high voltage of the voltage generator (not shown) is generated on the nozzle 15 and the collector 17, and the polymer spinning solution filled in the spinning liquid main tank 11 on the collector 17 flows into the nozzle block 13 via a nozzle 15.

Here, the spinning liquid to be filled in the spinning liquid main tank 11 is continuously supplied in a constant amount into a plurality of nozzles 15 to which a high voltage is applied through a metering pump (not shown) The spinning solution is radiated and focused on the collector 17 with a high voltage applied thereto through the nozzle 15 and the first nanofiber web is laminated on the lower surface of the support 3.

As described above, the support 3, on which the first nanofiber web is laminated, is moved to the rotating device 20 through the bottom-up electrospinning device 10.

The support 3 having the first nanofiber web laminated on the lower surface thereof passes through the rotating device 20 so that the first nanofiber web 3 located on the lower surface of the support 3, Is reversed in the direction of the top surface.

The supporting member 3 whose lower surface is rotated to the upper surface through the rotary device 20 is supplied to the top-down type electrospinning device 30 by the conveying roller 7, 30 is positioned on the upper surface of the collector 37. The collector 3 is provided on the upper surface of the collector 37,

The high voltage of the voltage generator is generated in the nozzle 35 and the collector 37 and the polymer spinning solution filled in the spinning liquid main tank 31 on the collector 37 generating the high voltage is supplied to the nozzle block 33 Through the nozzle 35 of the spray nozzle.

Each of the voltage generators has a structure similar to that of a general electrospinning device and generates a high voltage in the collectors 17 and 37 through the nozzles 15 and 35 and a nozzle 15 and 35 and the collector located below or above the nozzle blocks 13 and 33, preferably a voltage of 1 kV or more, more preferably 20 kV or more.

On the other hand, the spinning liquid to be filled in the spinning liquid main tank 31 is continuously and constantly supplied in a plurality of nozzles 35 to which a high voltage is applied through the metering pump, and the spinning solution supplied from the nozzle 35 is supplied to the nozzle On a first nanofiber web laminated by top-down electrospinning on the top surface of the support 3 while being radiated and focused on a collector 37 with a high voltage applied by a high-voltage electrospinning device 35, The web is laminated.

At this time, the conveyance of the support 3 to the bottom-up electrospinning apparatus 10, the conveyance to the rotary apparatus 20, and the conveyance to the top-down electrospinning apparatus 30 are performed by the conveying roller 7.

In the present invention, it is preferable that the bottom-up electrospinning device 10 and the top-down electrospinning device 30 are arranged in a straight line in the horizontal direction, but they may be arranged in a vertical direction in which the respective electrospinning devices are positioned in layers, And the electrospinning device is arranged in the U direction. The fact that they can be arranged in the vertical direction for each layer or in the U direction in the same layer has the advantage that the productivity can be increased in a limited area.

That is, the rotary device is characterized in that the support rotates 180 degrees or vertically rotates in the U-turn direction by the flip device.

As described above, by repeating the process of successively laminating the nanofibers on one surface of the support 3 while the support 3 is being transferred to the bottom-up electrospinning device 10 and the top-down electrospinning device 30, The nanofibrous web is laminated in a plurality of layers.

In the present invention, the spinning liquid main tanks 11 and 31 of the bottom-up electrospinning device 10 and the top-down electrospinning device 30 are filled with different kinds of polymer spinning solution.

That is, the polymer spinning solution injected from the bottom-up electrospinning device 10 and the polymer solution injected from the top-down electrospinning device 30 are made of different types of polymer spinning solution.

As described above, the nanofibers are manufactured by the nanofiber manufacturing apparatus 1 having the bottom-up electrospinning apparatus 10 and the top-down electrospinning apparatus 30, which are alternately arranged in succession, Is wound on the take-up roller 7, and the produced nanofiber is embossed or needle-punched to produce a nonwoven fabric.

Here, the support 3, on which the nanofiber webs produced through the bottom-up electrospinning device 10 and the top-down electrospinning device 30 are laminated, is subjected to a post-process by laminating the support 3 with the laminating device 50 .

Also, it is possible to further include an air permeability measuring device 70 for measuring an abnormality such as air permeability of the manufactured nanofiber web, and other process devices for other post-processes.

While the present invention has been particularly shown and described with reference to specific embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims. Anyone with it will know easily.

1: a nanofiber manufacturing apparatus, 3: a support,
5: feed roller, 7: feed roller,
9: take-up roller, 10: bottom-up electrospinning device,
11: tank main tank, 13: nozzle block,
14: voltage generating device, 15: nozzle,
17: collector, 20: rotating device,
20-1: Flip device,
21, 21 ': left and right guide members,
22, 22 ': left and right guide grooves,
30: top-down electrospinning device, 31: spinning fluid main tank,
33: nozzle block, 35: nozzle
37: collector, 50: laminating device,
60: Temperature control device,
70: air permeability measuring device,
112, 112a, 112b, 112c, 112d, 112e, 112f, 112g, 112h, 112i:
113: Heat line.

Claims (9)

delete delete delete delete Preparing a support;
Forming a first nanofiber web on the lower surface of the support by electrospinning the first polymer spinning solution with a bottom-up electrospinning device;
The support having the first nanofiber web laminated thereon passes through the rotating device and the lower surface is rotated 180 degrees to the upper surface;
Forming a second nanofiber web by sequentially electrospinning a second polymer spinning solution with a top-down electrospinning device on a first nanofiber web laminated on the support; And
Winding a support on which the first and second nanofiber webs are continuously laminated;
Lt; / RTI >
Wherein the first polymer solution for spinning and the solution for spinning second polymer are different,
Wherein the first and second nanofiber webs have different basis weights on the same plane in the longitudinal direction or the width direction of the support.
6. The method of claim 5,
Wherein the support is a substrate or a fabric.
delete 6. The method of claim 5,
After the step of successively laminating the second nanofiber webs
Further comprising laminating a support on which the first nanofiber web and the second nanofiber web are laminated. ≪ RTI ID = 0.0 > 21. < / RTI >
6. The method of claim 5,
Wherein the first and second polymer spinning solution is electrospun through a temperature controller at a temperature of 50 to 100 ° C.

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