KR101811660B1 - Nanofiber manufacturing apparatus and nanofiber manufacturing method using the same - Google Patents

Abstract

According to a preferred embodiment of the present invention, a top-down electrospinning device for producing a first nanofiber web by electrospinning a polymer spinning solution onto a support, the nozzle being directed from the top to the bottom, And a bottom-up electrospinning device for electrospinning the use solution to laminate the nanofiber webs, wherein the nanofiber manufacturing device comprises a top-down electrospinning device and a bottom-up electrospinning device, And a rotating device for rotating the upper surface of the support body by 180 degrees between the respective electrospinning apparatuses and between the respective electrospinning apparatuses The present invention also provides a nanofiber manufacturing apparatus and a method of manufacturing nanofibers. The present invention relates to a method for manufacturing a nanofiber separation membrane by spinning a support on which a nanofiber web is laminated and continuously producing a nanofiber web by using a top-down and bottom-up electrospinning device on the same surface to simplify the manufacturing process of the nanofiber separation membrane, It is possible to achieve the effect.

Description

TECHNICAL FIELD [0001] The present invention relates to a nanofiber manufacturing apparatus and a 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 an apparatus and a method for disposing a downward electrospinning device and a bottom-up electrospinning device alternately, spraying a spinning solution, 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.

According to a preferred embodiment of the present invention, a top-down electrospinning device for producing a first nanofiber web by electrospinning a polymer spinning solution onto a support, the nozzle being directed from the top to the bottom, And a bottom-up electrospinning device for electrospinning the use solution to laminate the nanofiber webs, wherein the nanofiber manufacturing device comprises a top-down electrospinning device and a bottom-up electrospinning device, And a rotating device for rotating the upper surface of the support body by 180 degrees between the respective electrospinning apparatuses and between the respective electrospinning apparatuses Wherein the nanofibers are fabricated using the nanofibers. The nanofiber manufacturing apparatus is characterized in that the top-down electrospinning apparatus and the bottom-up electrospinning apparatus are continuously arranged in the U-direction with respect to the horizontal direction, the vertical direction, or the horizontal direction, The apparatus further comprises a laminating device for laminating a support on which the first nanofiber web and the second nanofiber web are laminated at the rear end of the device.

The top-down type electrospinning device and the bottom-up type electrospinning device may further include a temperature control device for controlling the temperature of the polymer spinning solution, and each of the electrospinning devices may have the same plane And the basis weight is different.

According to another preferred embodiment of the present invention, there is provided a method for producing a nanofiber web, comprising the steps of preparing a support, electrospinning a polymer spinning solution with a top-down electrospinning device on a top surface of the support, A method of manufacturing a separation membrane including continuously forming a laminate of nanofiber webs by electrospinning a polymer spinning solution with a bottom-up electrospinning device on a web, the method comprising: electrospinning a polymer spinning solution with the top- A step of laminating a fibrous web, and a step of laminating a nanofiber web by electrospunning a polymer spinning solution with a bottom-up electrospinning device, are alternately constituted by three or more steps, and the nanofiber web During the step of forming the laminate, the supporting body passes the rotating device, and the upper face is rotated 180 degrees to the lower face And including the step, the polymer spinning solution to be used in the polymer spinning solution and the bottom-up electrospinning devices which is used in the top-down electrospinning device provides a method for producing nanofibers, characterized in that different types. The support is characterized by being a substrate or a fabric, wherein each of the nanofiber webs has a different basis weight on the same plane in the longitudinal direction or the width direction of the support. The polymer spinning solution is 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, and the nanofiber web is continuously formed on the same surface by the downward and downward electrospinning apparatus, 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 in which the type or basis weight of the polymer spinning solution is different in the CD direction in the nozzle in the 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 a 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 which is one embodiment of a rotating device used in the nanofiber manufacturing apparatus of the present invention, and FIG. 7 is a plan view showing a state in which the tubular body of the nozzle block of the present invention is turned on and off in the CD direction And FIG. 8 is a flowchart illustrating a process of electrospinning in which the type or basis weight of the polymer spinning solution is different in the CD direction according to the operation on the nozzle in the nozzle block shown in FIG. 7 And FIG. 9 is a plan view showing a process of electrospinning in which the type or basis weight of the polymeric spinning solution is different in the MD direction according to the operation on the nozzle in the nozzle block in the nozzle block of the present invention. Fig. 11 is a bird's-eye view schematically showing the arrangement of a case in which the nanofiber manufacturing apparatus of the present invention is arranged in a U-shape with respect to the horizontal direction.

As shown in the figure, the nanofiber manufacturing apparatus 1 according to the present invention comprises a top-down electrospinning apparatus 10, 10 'and a bottom-up electrospinning apparatus 30, 10, 10 'and the bottom-up electrospinning device 30 are arranged at regular intervals.

The top-down electrospinning device 10 and 10 'and the bottom-up electrospinning device 30 are provided with a polymer spinning solution in the spinning solution main tanks 11, 11' and 31, in which a polymer spinning solution (not shown) The nozzles 15, 15 ', and 35 are provided with a plurality of nozzles 15, 15', and 35 in the form of pins, (17, 17 ', 37) spaced apart from the nozzles (15, 15', 35) in order to accumulate the polymer spinning solution to be injected located at the lower end (in the case of the downward type electrospinning device) And a voltage generating device 14 for generating a voltage to the collectors 17, 17 ', and 37. [

According to the structure as described above, the nanofiber manufacturing apparatus 1 according to the present invention is characterized in that the spinning liquid main tanks 11, 11 ', and 31' of the top-down type electrospinning device 10, 10 ' 15 ', and 35 supplied with a high voltage through the metering pump and supplied to the nozzles 15, 15', and 35 are supplied to the nozzles 15, 15 ', and 35 through the nozzles 15, 15', and 35, 17 ', and 37 on the collectors 17, 17', and 37 with high voltage applied thereto through the electrodes 15, 15 ', and 35 to form a nanofiber web, and the formed nanofiber is embossed or needle punched into a nonwoven fabric .

The nozzle blocks 13, 13 ', and 33, in which the nozzles 15, 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 the tubular body of the nozzle block 13, 13 ', 33, which is provided in each of the electrospinning devices 10, 10', 30 and to which the polymer solution is supplied by the plurality of nozzles 15, 15 ' And a temperature control device for controlling the temperature of the polymer spinning solution. Here, the flow of the polymer solution in the nozzle block 13, 13 ', 33 is transmitted from the spinning solution main tanks 11, 11', 31 in which the polymer solution is stored through the spinning solution flow pipe (not shown) And is supplied to the tubular body 112. The polymer spinning solution supplied to each tube is radiated and discharged through a plurality of nozzles 15, 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, 15 ', and 35, which are spaced apart from each other at a predetermined interval in the longitudinal direction, are mounted on the tubular body 112 in a state of being electrically connected and electrically connected. Here, the temperature controller 60 is provided in the shape of a hot line on the inner circumference of the tube to control the temperature control of the polymer solution used for supplying and flowing the tubes. 3 to 5, a temperature regulating device 60 including a heat ray 113 is disposed on the inner circumference of the tube body of the nozzle block 13, 13 ', and 33 in such a manner that the nozzle block 13, 13' 33 formed in a spiral shape on the inner periphery of the tubular body to control the temperature of the polymer spinning solution supplied to and introduced into the tubular body. In the present invention, it is common to emit at room temperature, but it is also possible to emit at a high temperature of preferably 50 to 100 ° C.

In the embodiment of the present invention, a temperature regulating device 60 consisting of hot wire is spirally provided on the inner circumference of the tubular body of the nozzle block 13, 13 ', 33. However, A plurality of thermoforming devices may be provided on the inner peripheral radial direction of the tube to longitudinally adjust the temperature of the polymer solution, and the temperature regulating device 60 may be formed in a substantially C-shaped plate shape , And the temperature of the polymer spinning solution may be adjusted at the inner periphery of the tube.

In the meantime, a top-down type electrospinning device 10 and a bottom-up type electrospinning device 10 'are disposed at the front end of the nanofiber manufacturing apparatus 1, And a feed roller (5) for feeding a supporter (3) on which a nanofiber web is laminated by spraying a polymer spinning liquid from a spinning device, and a feed roller (5) Up rollers 9 for winding the rollers 3 are provided.

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

At this time, the top-down electrospinning apparatus 10, 10 'and the bottom-up electrospinning apparatus 30 are arranged symmetrically with respect to the collectors 17, 17', 37 in the upward and downward directions. That is, the top-down type electrospinning device 10 and 10 'are arranged such that the collectors 17 and 17' are located at the top of the nozzles 15 and 15 ' 35).

On the other hand, conveying rollers 7 are provided at both ends of each of the collectors 17, 17 ', and 37, and are integrated in the collectors 17, 17', and 37 through the respective conveying rollers 7, The support 3 on which the fibers are laminated is transported in the horizontal direction. That is, the polymer spinning solution injected from the nozzle 15 of the top-down electrospinning device 10 located at the front end portion is laminated on the support 3 of the collector 17, The transfer rollers 7 for repeatedly and continuously advancing the above process to the top-down electrospinning apparatus 10 'are horizontally moved on the collectors 37 of the respective collectors 17, 17', and 37, Respectively.

In the present invention, the rotating device 20 is provided between the top-down electrospinning device 10 and the bottom-up electrospinning device 30, and between the bottom-up electrospinning device 30 and the top- . The rotating device 20 is disposed between the electrospinning devices and rotates the supporting body 3 by 180 degrees so as to rotate the upper surface of the supporter to be the lower surface and the lower surface to be the upper surface.

5 and 6 are cross-sectional views schematically showing the flip device 20-1 used as one embodiment of the rotating device 20. As shown in Fig. 5 is a sectional view showing the initial operation of the flip device 20-1, and FIG. 6 is a cross-sectional view showing a process of the latter operation of the flip device 20-1. The flip device 20-1 is formed as a cylindrical body having a hollow inside and has a guide groove for inserting both ends of the support 3 on the inner periphery on both sides in the horizontal direction on both sides in the center thereof. (21, 21 ') 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 top-down type electric device 10 is sprayed onto the support 3 of the collector 17 through the nozzle 15, The supporting body 3 on which nanofibers are laminated after the polymer spinning solution injected on the collector 3 of the collector 17 is integrated is rotated by the rotating device 20 by the top- The upper surface of the laminated support 3 is rotated 180 degrees to the lower surface. And then transferred to the collector 37 of the bottom-up electrospinning device 30 through the conveying roller 7 and to the support 3 on which the nanofibers transferred onto the collector 37 are laminated, The polymer spinning solution filled in the spinning liquid main tank 31 of the spinning solution tank 30 is electrospun through the nozzle 35. Thereafter, the lower surface of the support formed by the rotary device 20 rotates 180 degrees to the upper surface. Is then transferred onto the collector 17 'of the top-down electrospinning apparatus 10' through the transfer roller 7 and again onto the nanofiber web produced by the bottom-up electrospinning apparatus 30 again via the top-down electrospinning apparatus 10 &Quot;) is laminated. The final product is produced while performing the above-described process continuously and repeatedly.

The nanofibers produced by passing through the top-down electrospinning apparatus 10, 10 ', the rotating apparatus 20 and the bottom-up electrospinning apparatus 30 of the nanofiber manufacturing apparatus 1 of the present invention by the above- The polymeric spinning solution is injected into the support 3 through the nozzles 15, 15 ', and 35 of the top-down electrospinning device 10 and 10' and the bottom-up electrospinning device 30 to form the collectors 17 and 17 ' 15 ', 35 of the bottom-up electrospinning device 30 and the top-down electrospinning device 10, 10' such that the nanofiber webs are continuously laminated on one side of the support 3 on the substrate The polymer spinning solution to be injected is laminated, and the nanofiber web is formed into a plurality of layers, whereby the final nanofiber product is manufactured.

In the embodiment of the present invention, the number of the electrospinning apparatuses is limited to three, but it is also possible that four or more top-down electrospinning apparatuses and bottom-up electrospinning apparatuses are alternately arranged. At this time, a rotating device must be provided between each electrospinning device.

In an embodiment of the present invention, the voltage of the top-down electrospinning device is higher than the voltage of the bottom-up electrospinning device so that the diameter of the nanofibrous web produced by the top-down electrospinning device 10, 10 ' It is possible to make the diameter smaller than the diameter of the nanofiber web produced by the spinning device 30. [

In the meantime, it is possible to fill the spinning liquid main tanks 11, 11 ', 31 of the top-down type electrospinning device 10, 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 variously according to the characteristics.

However, the present invention is characterized in that the polymer solution for spraying from the top-down electrospinning device 10, 10 'and the polymer solution for spraying from the bottom-up electrospinning device 30 are different. Specifically, an electrospinning device, for example, a top-down electrospinning device 10 and a bottom-up electrospinning device 30, and a polymeric spinning solution used in a bottom-up electrospinning device 30 and a top- The types of the polymer spinning solution used in the top-down electrospinning device 10 and the top-down electrospinning device 10 'may be the same or different. It is preferable that the kinds of the spinning solution for the adjacent electrospinning devices are different.

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.

In the present invention, the polymeric spinning solution filled in the spinning solution main tanks 11 and 11 'of the top-down type electrospinning device 10 and 10' and the spinning solution main tank 31 of the bottom-up electrospinning device 30 It is characterized in that the kinds of the polymer spinning solution to be filled are different. At this time, the types of the polymer solution for use in the top-down electrospinning device 10 and the top-down electrospinning device 10 'may be the same or different. It is preferable that the kinds of the spinning solution for the adjacent electrospinning devices are different.

Each of the nozzle blocks 13, 13 ', 33 of the present invention includes a tubular body 112a, 112b, 112c, 112d, 112e, 112f, 112g, 112h having a plurality of nozzles 15, 15' 112b, 112c, 112d, 112e, 112f, 112g, 112h, 112i are arranged in the nozzle block in the lengthwise direction or the width direction of the substrate, and the tubes 112a, 112b, , 11 ', 31) to supply the polymer spinning solution filled in the spinning solution main tanks (11, 11', 31).

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

At this time, 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, 11 ' ), And the supply amount regulating means is constituted by a valve.

In this way, valves are provided in the supply piping which is communicated to the tubular bodies 112a, 112b, 112c, 112d, 112e, 112f, 112g, 112h, 112i in the spinning liquid main tanks 11, 11 ' The supply of the polymer solution to be supplied to each of the tubes 112a, 112b, 112c, 112d, 112e, 112f, 112g, 112h, 112i in the waste solution main tanks 11, 11 ' on-off system.

That is, when the polymer solution is supplied to the tubes 112a, 112b, 112c, 112d, 112e, 112f, 112g, 112h, 112i from the spinning liquid main tanks 11, 11 ' The opening and closing of the valve provided in the supply pipe leading to the use liquid main tanks 11, 11 ', 31 and the tubes 112a, 112b, 112c, 112d, 112e, 112f, 112g, 112h, (112b, 112d, 112f, 112g, 112h, 112i) of the tubular body (112a, 112b, 112c, 112d, 112e, 112f, 112g, 112h, 112i) 112b, 112c, 112d in the spinning liquid main tanks 11, 11 ', 13 by opening and closing of the valves 212, 213, 214, 233, , 112e, 112f, 112g, 112h, and 112i of the polymeric spinning solution is controlled and controlled.

By the above structure, the spinning liquid main tanks 11, 11 ', 31 and the tubes 112a, 112b, 112c, 112d, 112e, 112f, 112g, 112h, 112i are provided, A plurality of valves are provided in the supply piping to supply the polymer solution for each of the tubes 112a, 112b, 112c, 112d, 112e, 112f, 112g, 112h, 112i in the spinning liquid main tanks 11, 11 ' 112b, 112c, 112d, 112e, 112f, 112g, 112h, 112i arranged at the nozzle blocks 13, 13 ', 33, 112c and 112e at specific positions in the tubular body arranged in the nozzle blocks 13 and 33 by supplying the polymer solution for only the polymer block 112d, 112f, 112g, 112h and 112i, 112b, 112c, 112d, 112e, 112f, 112g, 112h, 112i in the waste liquid main tanks 11, 11 ', 31 by the opening and closing of the valve, Supplied The supply of the polymer spinning solution is adjusted and controlled.

That is, each of the nozzles 15, 15 ', and 35 provided in the supply pipe and the pipes 112a, 112b, 112c, 112d, 112e, 112f, 112g, 112h, and 112i is addressed, , 15 ', and 35, respectively.

The radiation amount regulating means is constituted by a valve. The supply of the polymer spinning solution supplied to the nozzles 15, 15 ', and 35 from the supply pipe by the opening and closing of the valve is individually controlled by providing the valve as the spinning amount adjusting means, (Not shown). It is preferable that the opening and closing of the valve are 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 supply of the spinning solution to the nozzles (15, 15 ', 35) Structure and means, but is not limited thereto.

In the present invention, a valve is provided in the supply piping so that the tubes 112a, 112b, 112c, 112d, 112e, and 112f of the nozzle blocks 13, 13 ', 33 in the spinning liquid main tanks 11, 11' 112b, 112c, 112d, 112e, 112f, 112g, 112h, 112i, 112g, 112h, 112i, 112b, 112c, 112d, 112e, 112f, 112g, 112h, 112i) supplied to the tubular body (112a, 112b, 112c, 112d, 112e, 112f) The nanofiber webs having different polymer types or basis weights are formed in the width direction or the longitudinal direction of the support 3 by the polymer spinning solution electrospunning from the respective nozzles 15, 15 ', and 35 of the support 3.

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).

FIG. 7 is a plan view showing a state in which the nozzles 15, 15 ', and 35 in the electrospinning apparatus of the present invention are turned on and off in the CD direction, and FIG. As described above, the operation of the nozzle in the electrospinning device is electrically turned on and off so that the nano-sized nanomaterials having a different type or basis weight of the polymer spinning solution in the CD direction A fibrous web can be formed. 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.

Meanwhile, the nanofiber web produced through the top-down electrospinning device 10, 10 'and the bottom-up electrospinning device 30 forming the apparatus for producing nanofibers of the present invention and the laminate for laminating the support 3 The apparatus 50 is further provided and the laminating apparatus 50 is located at the rear end of the apparatus 1 for manufacturing nanofibers according to the present invention to perform a post-process.

The top-down type electrospinning device 10 and the bottom-up type electrospinning device 30 and the top-down type electrospinning device 10 'constituting the nanofiber manufacturing apparatus 1 may be arranged in parallel to one another in the horizontal direction, The radiating devices are arranged in the vertical direction in which the radiating devices are arranged in layers, 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.

Meanwhile, in the embodiment of the present invention, the laminating device 50 is provided at the end of the nanofiber manufacturing apparatus 1 and is manufactured through the top-down type electrospinning device 10, 10 'and the bottom-up electrospinning device 30 (Not shown) for supplying a base material (not shown) to the lower side of the laminating device 50, and a feed roller (not shown) for feeding a base material It is preferable that the nanofiber web is directly electrified by being laminated on the substrate to be laminated, and laminated to the multilayered laminate 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 top-down electrospinning device 10 through the feed roller 5 provided at the front end of the apparatus 1 for manufacturing nanofibers 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 nanofiber web is laminated on the upper surface of the support 3.

As described above, the support 3, on which the nanofibers are stacked, is moved to the rotating device 20 through the top-down electrospinning device 10.

The support 3 on which the nanofiber web is laminated on the upper surface is rotated 180 degrees to the lower surface while passing through the rotating device 20 so that the nanofiber web located on the upper surface of the support 3 is oriented in the lower surface direction .

As described above, the support 3, whose upper surface is rotated to the lower surface through the rotary device 20, is then fed to the bottom-up 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.

As described above, the supporting body 3, on which the nanofibers are stacked, is moved to the rotating device 20 through the bottom-up electrospinning device 30.

The support 3 on which the nanofiber web is laminated on the upper surface is rotated 180 degrees to the upper surface while passing through the rotating device 20 so that the nanofiber web located on the lower surface of the support 3 is oriented in the upper surface direction .

As described above, the support 3 whose lower surface is rotated to the upper surface through the rotary device 20 is then supplied to the top-down type electrospinning device 10 'by the conveying roller 7, The support 3 fed to the collector 10 'is located on the upper surface of the collector 17'.

The high voltage of the voltage generator is generated in the nozzle 15 'and the collector 17', and the polymer spinning solution filled in the spinning liquid main tank 11 'on the collector 17' And is injected through the nozzle 15 'of the nozzle block 13'.

Here, each of the voltage generating devices generates a high voltage in the collectors 17, 17 ', and 37 through the nozzles 15, 15', and 35 in the same structure as a general electrospinning device, It is preferable to apply a voltage of 1 kV or more to the collector located below or above the nozzles 15, 15 ', 35 and the nozzle blocks 13, 13', 33, more preferably, To walk.

On the other hand, the spinning liquid to be filled in the spinning liquid main tank 11 'is continuously and quantitatively supplied in a large number of nozzles 15' to which a high voltage is applied through the metering pump, and the spinning solution supplied from the nozzle 15 ' On a nanofiber web laminated by top-down electrospinning on the top surface of the support 3 while being radiated and focused on a collector 17 'with a high voltage applied by a nozzle 15' A fibrous web is laminated.

At this time, the conveyance of the support 3 to the downward-type electrospinning apparatus 10, the conveyance to the rotary apparatus 20, the conveyance to the bottom-up electrospinning apparatus 30 and the conveyance to the top-down electrospinning apparatus 10 ' 7).

In the present invention, it is preferable that the top-down type electrospinning device 10, 10 'and the bottom-up type electrospinning device 30 are arranged in a straight line in the horizontal direction, but they may be arranged in the vertical direction And each of the electrospinning devices is arranged in the U-direction in the 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.

As described above, the support 3 is transferred to the top-down electrospinning apparatus 10 and the bottom-up electrospinning apparatus 30, and transferred to the top-down electrospinning apparatus 10 ' The nanofibers are laminated on the support 3 in a plurality of layers.

In the present invention, the polymer spinning solution injected from the top-down electrospinning device 10, 10 'and the polymer solution injected from the bottom-up electrospinning device 30 are filled with different types. Specifically, an electrospinning device, for example, a top-down electrospinning device 10 and a bottom-up electrospinning device 30, and a polymeric spinning solution used in a bottom-up electrospinning device 30 and a top- The types of the polymer spinning solution used in the top-down electrospinning device 10 and the top-down electrospinning device 10 'may be the same or different. It is preferable that the kinds of the spinning solution for the adjacent electrospinning devices are different.

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

As described above, the nanofibers are formed in multiple layers on one surface through the nanofiber manufacturing apparatus 1 having the down-type electrospinning apparatus 10, 10 'and the bottom-up electrospinning apparatus 30, which are alternately arranged in succession The support 3 is wound up through a take-up roller 7, and the produced nanofibers are embossed or needle punched into a nonwoven fabric.

Here, the support 3, on which the nanofiber webs produced through the top-down electrospinning device 10, 10 'and the bottom-up electrospinning device 30 are laminated, is laminated with a 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, 10 ': top-down electrospinning device,
11, 11 ': spinning liquid main tank, 13, 13': nozzle block,
14: voltage generating device, 15, 15 ': nozzle,
17, 17 ': collector, 20: rotating device,
20-1: Flip device,
21, 21 ': left and right guide members,
22, 22 ': left and right guide grooves,
30: bottom-up electrospinning device, 31: spinning liquid 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)

A top-down electrospinning device in which the nozzles are directed from the top to the bottom, and a polymeric spinning solution is electrospun on a support to produce a first nanofiber web; And
And a bottom-up electrospinning device for laminating the second nanofiber web by electrospinning the polymer spinning solution with the nozzle directed from the bottom to the top,
The apparatus for manufacturing nanofibers may include at least three down-type electrospinning apparatuses and at least three bottom-up electrospinning apparatuses,
The types of polymer spinning solution used in each adjacent electrospinning device are different,
And a rotating device between the electrospinning devices for rotating the lower surface of the support body 180 degrees to the upper surface,
Wherein each of the electrospinning devices has a basis weight different on the same plane in the longitudinal direction or the width direction of the support.
The method according to claim 1,
Wherein the rotating device rotates the supporting body 180 degrees or vertically rotates in the U-turn direction by the flip device.
The method according to claim 1,
Wherein the apparatus further comprises a laminating device for laminating a support having a first nanofiber web and a second nanofiber web laminated on the rearmost end of the nanofiber manufacturing apparatus.
The method according to claim 1,
Wherein the top-down electrospinning device and the bottom-up electrospinning device each further comprise a temperature regulating device for regulating the temperature of the polymer spinning solution.
delete Preparing a support;
Forming a nanofiber web on the upper surface of the support by electrospinning a polymer spinning solution with a top-down electrospinning device; And
And a step of sequentially laminating a nanofiber web by electrospinning a polymer spinning solution with a bottom-up electrospinning device on the nanofiber web laminated on the support,
The step of electrospinning the polymer spinning solution with the top-down electrospinning device to form a laminate of the nanofiber web, and the step of electrospinning the polymer spinning solution with the bottom-up electrospinning device to laminate the nanofiber web, Respectively,
The step of rotating the lower surface of the support body through 180 degrees to the upper surface while the support body passes through the rotating device between the step of forming the nanofiber web by the respective electrospinning devices,
The polymer spinning solution used in each adjacent electrospinning device is of a different kind,
Wherein each of the nanofiber webs has a different basis weight on the same plane in the longitudinal direction or in the width direction of the support.
The method according to claim 6,
Wherein the support is a substrate or a fabric.
delete The method according to claim 6,
Wherein the polymer spinning solution is electrospun through a temperature controller at a temperature of 50 to 100 ° C.

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