WO2012111930A2

WO2012111930A2 - Electrospinning apparatus, and apparatus for manufacturing nanofibers

Info

Publication number: WO2012111930A2
Application number: PCT/KR2012/000847
Authority: WO
Inventors: 이재환
Original assignee: 주식회사 톱텍; 신슈 다이가쿠
Priority date: 2011-02-15
Filing date: 2012-02-06
Publication date: 2012-08-23
Also published as: WO2012111930A3

Abstract

The present invention relates to an electrospinning apparatus and to an apparatus for manufacturing nanofibers. The electrospinning apparatus comprises: a nozzle block (250) in which a plurality of nozzles (240) are two-dimensionally arranged; and a device (400) for supplying polymer solutions. The electrospinning apparatus discharges the polymer solutions onto an elongate sheet so as to deposit the nanofibers. The device (400) for supplying the polymer solutions includes: polymer-solution tanks (411, 412) for storing a plurality of types of polymer solutions that comprise different components therein; and polymer-solution flow pipes (421 to 427) for enabling the plurality of types of polymer solutions to flow therethrough. The nozzle block (250) has tubular bodies (271 to 277), one end of each of which is closed and the other end of each of which serves as a port for supplying the polymer solutions. Each tubular body has a predetermined number of nozzles (240) arranged in the lengthwise direction of each tubular body. Polymer-solution flow pipes (431 to 437) for enabling the polymer solutions to flow therethrough are connected to the respective ports for supplying the polymer solutions of the tubular bodies. Thus, nozzles can be easily managed, and various methods for supplying polymer solutions can be set.

Description

Field Emission Apparatus and Nano Fiber Manufacturing Apparatus

The present invention relates to a field emission device and a nanofiber production device.

DESCRIPTION OF RELATED ART Conventionally, the nanofiber manufacturing apparatus which manufactures a nanofiber by performing electric field spinning with the field emission apparatus provided along the conveyance direction of a long sheet is known (for example, refer patent document 1).

9 is a view illustrating a conventional nanofiber manufacturing apparatus 900. The conventional nanofiber manufacturing apparatus 900 conveys by the conveying apparatus 910 which conveys the elongate sheet W along a predetermined conveyance direction, and the said conveying apparatus 910, as shown in FIG. The electric field radiating device 920 which electric field-spins the long sheet W by discharging a polymer solution to the long sheet W is provided.

The field radiating device 920 is provided at a position opposite to the collector 930 and the collector 930, and a nozzle block in which two or more nozzles 940 for discharging the polymer solution are two-dimensionally arranged at a predetermined arrangement pitch. 950 and a power supply 960 for applying a high voltage between the collector 930 and the nozzle block 950.

In the conventional nanofiber manufacturing apparatus 900, the plurality of nozzles 940 are directly mounted to the nozzle block 950, and the polymer solution stored in the polymer solution tank 970 is stored in the nozzle block 950. After flowing in, it is supplied to each nozzle 940.

In the conventional nanofiber manufacturing apparatus 900, as described above, the plurality of nozzles 940 are directly mounted to the nozzle block 950, and the polymer solution is supplied to each nozzle 940 through the nozzle block 950. It is configured to be.

For this reason, when the nozzle 940 is repaired or replaced, the entire nozzle block 950 may need to be separated from the field radiating device 920 depending on the situation, and the problem may be difficult to manage. In addition, there is also a problem that can not be variously set the supply method of the polymer solution.

Accordingly, an object of the present invention is to provide an electrospinning apparatus and a nanofiber manufacturing apparatus that facilitate the management of the nozzle and enable various methods of supplying a polymer solution.

[1] An electrospinning apparatus of the present invention includes a nozzle block having a collector, a plurality of nozzles disposed at a position opposite to the collector and discharging a polymer solution in two dimensions, and supplying the polymer solution to the nozzle. A polymer solution supply device and a power supply device for applying a high voltage between the collector and the nozzle, and discharging the polymer solution to a long sheet that is conveyed in a predetermined conveying direction between the collector and the nozzle. An electrospinning apparatus for depositing nanofibers, wherein the polymer solution supply device includes a polymer solution tank for storing a plurality of types of polymer solutions having different components, and a plurality of polymers for distributing the plurality of types of polymer solutions for each type of polymer solution. And a nozzle flow pipe formed along the width direction of the long sheet. One end is occluded.

Iv) a plurality of pipes, each of which is a polymer solution supply port, the other end being provided along the conveying direction of the long sheet, wherein the nozzles are provided in the pipes of the pipes in the longitudinal direction of the pipes. And a polymer solution distribution pipe for circulating the polymer solution of the type assigned to the tube so that a polymer solution of the type assigned to the tube is supplied to each polymer solution supply port of each tube. It is characterized by that.

According to the electrospinning apparatus of this invention, it is a structure which attached a nozzle to the some pipe body provided in the inside of a nozzle block. Therefore, when the nozzle is repaired or replaced, the nozzle can be repaired or replaced in a tubular unit, and the nozzle management can be facilitated. Also, for example, the supply of the polymer solution is controlled to control the supply amount of the polymer solution for each nozzle listed along the width direction of the long sheet, or to supply a different type of polymer solution for each nozzle listed along the width direction of the long sheet. You can set various methods.

[2] In the electric field radiating device of the present invention, it is preferable that the respective tube bodies are detachably attached to the nozzle block.

Thereby, each tubular body can be easily taken out from a nozzle block, and when a nozzle is repaired or replaced, a nozzle can be repaired or replaced by a tubular unit easily.

[3] In the electrospinning device of the present invention, it is preferable that a polymer solution supply amount control valve is provided in the polymer solution distribution pipe corresponding to each of the tubes in order to control the supply amount of the polymer solution for each of the tubes.

By having such a structure, it is possible to control the supply amount of the polymer solution for each tube. For example, if the type of polymer solution is assigned to each tube, the supply amount of the polymer solution of the type assigned to each tube can be controlled for each tube, so that the distribution of different types of polymer solutions can be varied. Can be set to In addition, in this invention, "to enable control of the supply amount of a polymer solution" means that the improvement of a polymer solution supply amount control valve can be controlled from zero to the maximum. This makes it possible to arbitrarily control the supply amount of the polymer solution from zero to the maximum value.

[4] In the electrospinning apparatus of the present invention, the polymer solution distribution pipe is preferably provided with a polymer solution supply amount control valve for collectively controlling the supply amount of the polymer solution for each type of the polymer solution.

By having such a structure, since control of supply amount can be collectively performed for every kind of polymer solution, distribution of the polymer solution of a different kind, etc. can be changed easily.

[5] In the field emission device of the present invention, the polymer solution tank is preferably provided separately for each type of the polymer solution.

By setting it as such a structure, a some kind of polymer solution can be stored for every kind of polymer solution.

[6] In the field emission device of the present invention, the polymer solution tank is divided in such a manner that a plurality of polymer solution storage chambers capable of storing the plurality of polymer solutions for each type of the polymer solution are formed. Field radiating device.

By setting it as such a structure, several types of polymer solution can be stored for every kind of polymer solution.

[7] In the field radiating apparatus of the present invention, the nozzles mounted on the respective tubular bodies are formed by the nozzles mounted on the tubular bodies to which the same kind of polymer solution is assigned when the nozzle block is viewed along the conveying direction. It is preferable that the column of a conveyance direction is attached to each said tube body so that it may arrange on the straight line which has the inclination of a predetermined angle with respect to the said conveyance direction on the plane parallel to the surface of the said elongate sheet | seat.

By arranging the nozzles attached to the respective pipe bodies in such an arrangement, the mounting positions of the nozzles in the longitudinal direction (width direction of the long sheet) of the pipe bodies are shifted from each other in the adjacent pipe bodies among the pipe bodies to which the same kind of polymer solution is assigned. Becomes Thereby, the nanofibers which consist of each kind of polymer solution with respect to the elongate sheet conveyed along a conveyance direction can be deposited uniformly, respectively without an imbalance.

[8] In the electric field radiating device of the present invention, the nozzle and each tube are made of a conductive member, one of the positive electrode and the negative electrode of the power supply device is connected to the collector, and the other of the positive and negative electrode of the power supply device. It is preferable that an electrode is connected to each said pipe | tube, and the side of each pipe | tube is made into ground potential.

Thus, since each pipe | tube side is made into a ground potential, the components (for example, a nozzle block, a housing | casing body, including "a polymer solution before discharged from a nozzle" and a polymer solution are electrically connected to each pipe | tube, respectively. Since the entirety of the polymer solution supply device for supplying to " etc. ") becomes the ground potential, it is not necessary to make each of these components a high withstand voltage specification. Therefore, the mechanism of the field emission device is not complicated due to the high voltage specification of each of these components.

In addition, the "polymer solution supply apparatus for supplying a polymer solution to each pipe | tube" includes a polymer solution tank, a polymer solution distribution pipe, a polymer solution supply amount control valve, and the like.

[9] In the electric field radiating device of the present invention, it is preferable to further include a reciprocating drive unit for reciprocating the nozzle block at a predetermined cycle along the width direction of the long sheet.

By providing such a reciprocating drive part, a nozzle block can be reciprocated along the width direction of a long sheet. In this case, by controlling the reciprocating cycle so as to be an appropriate cycle, it is possible to prevent the discharge positions of the nozzles from overlapping with the discharge positions of the other nozzles with respect to the long sheet that is conveyed in the conveying direction. Thereby, the deposition amount of the polymer fiber of the elongate sheet W can be made uniform.

In the electric field radiating device of the present invention, it is preferable to further include a gap adjusting driver for driving the nozzle block so that the gap between the nozzle block and the collector can be adjusted.

By providing such a space | interval adjustment drive part, the space | interval of a nozzle block and a collector can be adjusted. In this case, if the distance between the collector block and the nozzle block is adjusted to the optimum interval before starting the field emission, the field emission can be performed while the distance between the nozzle block and the collector is optimally set. In addition, the distance between the collector and the nozzle block may be determined in consideration of the spinning conditions of the field emission device, the type of the polymer solution, the average diameter of the nanofibers, the thickness of the nanofiber nonwoven fabric, and the like.

[11] The nanofiber manufacturing apparatus of the present invention is a nanofiber manufacturing apparatus including a conveying apparatus for conveying a long sheet in a predetermined conveying direction and an electric field spinning apparatus for electric field spinning of the long sheet conveyed in the predetermined conveying direction. The field radiating device is characterized in that the field radiating device according to any one of [1] to [10].

According to the nanofiber manufacturing apparatus of the present invention, since the field emission device of the present invention is provided, it becomes possible to stably produce nanofibers having desired performance.

[12] In the nanofiber manufacturing apparatus of the present invention, the conveying apparatus conveys the feeding roller for supplying the long sheet and the long sheet at a predetermined conveying speed, and the long sheet in which the nanofibers are deposited in the field spinning device. A winding roller for winding the winding roller, a winding roller driving unit for driving the winding roller, and a first tension provided on the supply roller side and the winding roller side than the field radiating device, respectively, to impart a predetermined tension to the long sheet. It is preferred to have a roller and a second tension roller.

By having such a structure, a long sheet can be conveyed by appropriate tension along a conveyance direction.

[13] In the nanofiber manufacturing apparatus of the present invention, the first tension roller is capable of independently adjusting at least one position in each of the ends in the vertical direction and the horizontal direction of one end portion and the other end portion of the first tension roller. And a first tension roller position adjustment mechanism, wherein the second tension roller is capable of independently adjusting at least one position in each of the vertical and horizontal directions of one end portion and the other end portion of the second tension roller for each end portion. It is desirable to have a second tension roller position adjustment mechanism.

By having such a structure, the error of the conveyance direction of a long sheet can be corrected, and tension adjustment can also be easily performed so that it may become an appropriate tension.

[14] In the nanofiber manufacturing apparatus of the present invention, the conveying apparatus includes: a winding amount measurement information output device for outputting winding amount measurement information indicating a winding amount of a long sheet on which the nanofibers of the winding roller are deposited; It is preferable to further provide a conveyance speed control apparatus which controls the said winding roller drive part based on the winding amount measurement information output from the measurement information output apparatus.

By setting it as such a structure, even if the winding amount of the "long sheet by which the nanofibers were deposited" of the winding roller changes, the conveyance speed of a long sheet can always be kept constant.

[15] In the nanofiber manufacturing apparatus of the present invention, the conveying apparatus is provided at a predetermined position between the field radiating apparatus and the winding roller, and for cutting the long sheet on which the nanofibers are deposited along the width direction of the long sheet. It is preferable to further provide a cutting device.

By having such a structure, when the "long sheet which nanofibers were deposited" was wound by a predetermined amount by the winding roller, the "long sheet which nanofibers were deposited" can be cut at a predetermined position. In this case, a winding roller which does not sense "a long sheet in which nanofibers are deposited" is newly attached, and a tip of a subsequent "long sheet in which nanofibers are deposited" is attached to the winding roller. By repeating such an operation, the "long sheet in which the nanofibers are deposited" can be easily taken out every predetermined winding amount.

Moreover, according to the nanofiber manufacturing apparatus of the present invention, medical products such as high-performance and highly sensitive textiles, beauty-related articles such as health care and skin care, industrial materials such as wiping cloth and filters, separators for secondary batteries, Nanomaterials that can be used for a wide range of applications such as capacitors of capacitors, carriers of various catalysts, electronic and mechanical materials such as various sensor materials, regenerative medical materials, biomedical materials, medical MEMS materials, and biosensor materials. Fibers can be produced.

The present invention provides an electrospinning apparatus and a nanofiber manufacturing apparatus that can easily manage nozzles and can also variously set a method for supplying a polymer solution.

1 is a diagram for explaining the nanofiber production apparatus 1 according to the embodiment.

FIG. 2 is an enlarged view illustrating the field radiating apparatus 200 of FIG. 1 taken out.

3 is a diagram illustrating the nozzle block 250.

4 is a diagram schematically showing the arrangement of the nozzles 240.

5 is a view for explaining the configuration of the main control device 300.

FIG. 6 is a diagram for explaining a first modification of the polymer solution supply device 400.

FIG. 7 is a diagram for explaining a second modification of the polymer solution supply device 400.

FIG. 8 is a diagram for explaining a third modification of the polymer solution supply device 400.

9 is a front view of a conventional nanofiber manufacturing apparatus 900.

EMBODIMENT OF THE INVENTION Hereinafter, the nanofiber manufacturing apparatus of this invention is described based on embodiment shown in drawing.

1.Field emission apparatus and nanofiber production apparatus according to the embodiment

1 is a diagram for explaining the nanofiber production apparatus 1 according to the embodiment. FIG. 1A is a front view of the nanofiber production apparatus 1, and FIG. 1B is a plan view of the nanofiber production apparatus 1. In addition, in FIG. 1, the component required when demonstrating the nanofiber manufacturing apparatus 1 which concerns on embodiment is shown, and illustration of the housing | casing etc. which comprise a nanofiber manufacturing apparatus is abbreviate | omitted. In FIG. 1A, some members are shown in cross-sectional view.

3 is a diagram illustrating the nozzle block 250. FIG. 3A is a perspective view when the lid 251 of the nozzle block 250 is removed, and FIG. 3B is a perspective view when the lid 251 of the nozzle block 250 is mounted. to be. 4 is a diagram schematically showing the arrangement of the nozzles 240. 5 is a diagram illustrating the main control device 300.

As shown in FIG. 1, the nanofiber manufacturing apparatus 1 which concerns on embodiment carries out the conveying apparatus 100 which conveys the elongate sheet W in the predetermined conveyance direction a, and the conveyance direction a. The electric field radiating apparatus 200 which electric-field radiates the elongate sheet W to be conveyed, the main control apparatus which controls each operation part (described below) of the conveying apparatus 100, and each operation part of the electric field radiating apparatus 200 ( 300).

The nanofiber manufacturing apparatus 1 according to the embodiment includes a VOC processing apparatus for burning and removing volatile components generated when the nanofibers are deposited on the long sheet W, in addition to the components described above, and the field radiating apparatus 200. When abnormality is detected, although the inert gas supply apparatus etc. which supply an inert gas to the field emission chamber 212 of the field emission apparatus 200 are included, these illustration is abbreviate | omitted.

As shown in FIG. 1, the conveying apparatus 100 heats the supply roller 101 which supplies the long sheet W before electric field spinning, and the heating device 117 which heats the long sheet W which deposited the nanofiber. And the winding roller 102 which winds the "long sheet W which deposited the nanofiber" heated by the heating apparatus 117. As shown in FIG. In addition, although the heating temperature of the heating apparatus 117 changes with the kind of long sheet W and the nanofiber, for example, "long sheet W" can be heated to the temperature of 50 degreeC-300 degreeC. In addition, what is called a nanofiber nonwoven fabric in the state which heated "the long sheet W which deposited the nanofiber" was heated.

In addition, the conveying apparatus 100 has the

auxiliary rollers

103, 104, 105, 106 provided between the supply roller 101 and the winding roller 102, and the supply roller 101 side and the winding of the electric field radiating device 200. One of the first tension roller 107 and the second tension roller 108, and one of the first tension rollers 107, respectively provided on the roller 102 side to impart a predetermined tension to the long sheet W. It is provided in the end part and the other end part, respectively, and the 1st tension roller

position adjustment mechanism

109a, 109b for performing the position adjustment of the 1st tension roller 107, the one end part of the 2nd tension roller 108, and It is provided in the other edge part, respectively, and is equipped with the 2nd tension roller

position adjustment mechanism

110a, 110b for performing the position adjustment of the 2nd tension roller 108. As shown in FIG.

Moreover, the conveying apparatus 100 measures the winding amount drive which outputs the winding roller drive part 111 which drives the winding roller 102, and the information for measuring the winding amount of the winding roller 102 (referred to winding amount measurement information). The "long sheet W in which nanofibers were deposited", that is, nanofiber nonwoven fabric, installed between the information output device 112 and the heating device 117 and the winding roller 102 and heated by the heating device 117. And a cutting device 114 for cutting the nanofiber nonwoven fabric present on the support 113 along the width direction of the nanofiber nonwoven fabric. .

As the winding amount measurement information output device 112, for example, a laser distance sensor or the like can be used. When using the laser distance sensor as the winding amount measurement information output device 112, the diameter of the nanofiber nonwoven fabric wound on the winding roller 102 by the laser distance sensor is measured, and the measurement result is used as the winding amount measurement information as the main control device. It sends to the conveyance speed control part 310 of 300 (refer FIG. 5). Also, the cutting device 114 cuts the pressing plate 115 for pressing the nanofiber nonwoven fabric on the support 113 when cutting the nanofiber nonwoven fabric, and the cutter 116 for cutting the nanofiber nonwoven fabric in the width direction of the nanofiber nonwoven fabric. Equipped.

The first tension roller

position adjustment mechanisms

109a and 109b are mechanisms for independently adjusting at least one position in each of the ends in the vertical direction and the horizontal direction of one end portion and the other end portion of the first tension roller 107. Equipped with.

The second tension roller

position adjustment mechanisms

110a and 110b are mechanisms for independently adjusting at least one position in each of the ends in the vertical direction and the horizontal direction of one end portion and the other end portion of the second tension roller 108. Equipped with.

Each end of the first tension roller 107 is operated by the first tension roller

position adjustment mechanisms

109a and 109b by operating an operation unit such as a handle provided for one end and the other end of the first tension roller 10. It is possible to move each end in at least one direction of the vertical direction and the horizontal direction independently of each end, and to make it possible to adjust the inclination of the 1st tension roller 107 to a predetermined range accordingly. The 1st tension roller

position adjustment mechanism

109a, 109b can also perform the same operation with respect to the 2nd tension roller 108. FIG.

The first tension roller

position adjustment mechanisms

109a and 109b and the second tension roller

position adjustment mechanisms

110a and 110b are provided in the first tension roller 107 and the second tension roller 108. The tension of the long sheet W passing through the field radiating device 200 can be made an appropriate tension. Moreover, the "error" in the width direction of the long sheet W with respect to the conveyance direction a, ie, the "error" when the long sheet W shift | deviates to the width direction (direction along a y-axis), can be corrected. As a result, the long sheet W can be conveyed in an optimal conveyance state for electric field spinning.

The conveyance speed control part 310 controls the winding roller drive part 111 so that the conveyance speed of the long sheet W may become predetermined speed (constant speed) based on winding amount measurement information. That is, the conveyance speed control part 310 is the winding roller drive part 111 so that the conveyance speed of the elongate sheet W may become a predetermined speed (constant speed) based on the winding amount measurement information sent from the winding amount measurement information output device 112. ).

As shown in FIGS. 1 and 2, the electric field radiating device 200 includes a conductive housing body 210, an auxiliary belt device 220 to assist the long sheet W from being conveyed, and a housing body ( A nozzle block 250 having a collector 230 mounted to the 210 through an insulating member 211, a plurality of nozzles 240 installed at a position opposite to the collector 230 and discharging the polymer solution; A power supply device 260 that applies a high voltage (eg, 10 kV to 80 kV) between the collector 230 and the nozzle 240, and an electric field that defines a predetermined space covering the collector 230 and the nozzle block 250. A radiation chamber 212 is provided.

In addition, although not shown in FIG. 1 and FIG. 2, the field emission device 200 includes a polymer solution supply device 400 for supplying a polymer solution to the nozzle 240 (see FIG. 3).

The insulating member 211 may be, for example, polyamide, polyacetal, polycarbonate, modified polyphenylene ether, polybutylene terephthalate, polyethylene terephthalate, amorphous polyarylate, polysulfone, poly Ethersulfone, polyphenylene sulfide, polyether ether ketone, polyimide, polyetherimide, fluororesin, liquid crystal polymer, polypropylene, high density polyethylene or polyethylene can be preferably used.

As shown in FIGS. 1 and 2, the auxiliary belt device 220 includes an auxiliary belt 221 rotating in synchronization with the conveying speed of the long sheet W, and a driving roller for rotating the auxiliary belt 221. 222 and the driven roller 223 which rotates as the auxiliary belt 221 rotates by the drive roller 222 are provided.

In addition, although the left roller is used as the driving roller 222 and the right roller is the driven roller 223 in FIG. 1 and FIG. 2, if the opposite may be sufficient and rotation of two rollers can be synchronized, both drive. It is good also as a roller.

The auxiliary belt 221 is made of an insulating and porous endless belt. In addition, the auxiliary belt 221 is preferably made of a polymer substrate having a thickness of 0.7mm ~ 10.0mm. Examples of the polymer include polyamides such as polyethylene, polyacetylene, polyurethane, polypropylene, nylon, polyacetal, polycarbonate, modified polyphenylene ether, polybutylene terephthalate, polyethylene terephthalate, amorphous polyarylate, polysulfone, Polyether sulfone, polyphenylene sulfide, polyether ether ketone, polyimide, polyetherimide, fluororesin, liquid crystal polymer and the like can be preferably used.

The auxiliary belt device 220 is provided so that the auxiliary belt 221 surrounds the collector 230. And the long sheet W is folded and conveyed by the drive roller 222 side in the state which contacted the outer peripheral side of the auxiliary belt 221. As shown in FIG.

In this way, since the auxiliary belt 221 is provided between the collector 230 and the long sheet W, the long sheet W is smoothly pulled by the collector 230 to which the high voltages of both sides are applied. Will be returned. In addition, since the auxiliary belt 221 is made of an insulating and porous endless belt, it does not significantly affect the electric field distribution formed between the collector 230 and the nozzle 240.

In addition, the width of the auxiliary belt 221 is wider than the width of the collector 230 is used. As a result, the auxiliary belt 221 is reliably present between the long sheet W and the collector 230, and the long sheet W is pulled by the collector 230, or the conveyance of the long sheet W is smooth. It is possible to surely prevent this from being disturbed.

As shown in Fig. 3, the nozzle block 250 includes a plurality of pipe bodies 271 to 277 having one end thereof as a closed end and the other end as a polymer solution supply port. . As for the tube bodies 271-277, each tube body is provided along the width direction of the elongate sheet W. As shown in FIG. That is, each of the tubes 271 to 277 is provided along the y-y 'direction in FIG. 3. In addition, in each of the tubular bodies 271 to 277, the tubular bodies are freely attached to the nozzle block 250.

In each of the tubes 271 to 277, a predetermined number of nozzles 240 are attached to each tube in predetermined lengths along the longitudinal direction of the tube. In addition, the nozzle 240 and the tubular bodies 271-277 are made of a conductive member such as copper, stainless steel, aluminum, and the like, and the nozzle 240 is electrically connected to the tubular bodies 271-277. It is attached to the tube bodies 271-277.

As shown in Fig. 3, the polymer solution supply device 400 includes two

polymer solution tanks

411 and 412 for storing polymer solutions of plural kinds (having two kinds of types A and B) having different components ( Hereinafter, the first polymer solution tank 411 and the second polymer solution tank 412), the polymer solution of type A and the polymer solution of type B are supplied to each tube 271-277 for each type of these polymer solutions. Seven polymer solution distribution pipes 421-427 made to flow are provided. In addition, a polymer solution supply pump for supplying the polymer solution stored in the first polymer solution tank 411 and the second polymer solution tank 412 with a predetermined pressure applied to each of the tubular bodies 271 to 277. (Not shown) is also provided.

Further, in the field radiating device 200 according to the embodiment, the first polymer solution tank 411 is a polymer solution tank for storing a type A polymer solution, and the second polymer solution tank 412 is for a type B polymer solution. It is set as the storage tank of the polymer solution. The polymer solution distribution pipes 421 to 424 of the polymer solution distribution pipes 421 to 427 are polymer solution distribution pipes for circulating a polymer solution of type A, and the polymer solution distribution pipes 425 to 427 are polymers of type B. It is set as the polymer solution distribution pipe which distributes a solution.

The polymer solution distribution pipes 421 to 424 for circulating the polymer solution of type A are connected to the respective polymer solution supply ports of the

tubes

271, 273, 275, and 277 of the tubes 271 to 277, respectively. The polymer solution distribution pipes 425 to 427 for circulating the polymer solution are connected to respective polymer solution supply ports of the

tubes

272, 274 and 276 in the tubes 271 to 277.

Further, the polymer solution supply pipes 421 to 427 are provided with polymer solution supply amount control valves 431 to 437 for enabling control of the supply amount of the polymer solution. In addition, "to enable the control of the supply amount of the polymer solution" means that the improvement of the polymer solution supply amount control valves 431 to 437 can be controlled from zero to the maximum. This makes it possible to arbitrarily control the supply amount of the polymer solution from zero to the maximum value.

In addition, in FIG. 3, the code | symbol which shows the nozzle 240 is attached only to each one part nozzle for simplicity of drawing.

In addition, when the nozzle 240 is attached to each of the tubes 271 to 277, the nozzle block 250 is viewed along the conveying direction a, each nozzle is attached to each tube to which the same kind of polymer solution is assigned. The column of the conveyance direction by is attached to each pipe | tube so that it may arrange on the straight line which has the inclination of a predetermined angle with respect to the conveyance direction a in the plane parallel to the surface of the elongate sheet W. As shown in FIG.

That is, in the field radiating device 200 according to the embodiment, as shown in FIG. 4, the nozzles 240 mounted on the

respective tubes

271, 273, 275, and 277 to which a polymer solution of type A is assigned are used. Each tubular body 271 so that the column of conveyance direction a may arrange in the straight line L1 which has the inclination of predetermined angle (theta) 1 with respect to conveyance direction a on the plane parallel to the surface of elongate sheet W. , 273, 275, 277, and the heat in the conveying direction a of the nozzle 240 mounted on each of the

tubular bodies

272, 274, 276 to which the polymer solution of type B is assigned is elongated. It is attached to each

tubular body

272, 274, 276 so that it may arrange in a straight line L2 with the inclination of predetermined angle (theta) 2 with respect to the conveyance direction a on the plane parallel to the surface of the sheet | seat W. As shown in FIG.

In Fig. 4, the nozzles 240 mounted on the

tubes

271, 273, 275, and 277 to which the polymer solution of type A is assigned are indicated by white circles, and each tube body to which the polymer solution of type B is assigned. The nozzles 240 mounted on 272, 274, and 276 are shown by gray circles.

By attaching each nozzle 240 to each tube 271 to 277 so that each nozzle 240 is arranged in such a manner, the length of the tube body (long sheet W) to which the same kind of polymer solution is assigned. Since the mounting position of the nozzle 240 of the width direction becomes a mutually shifted position in the adjacent pipe | tube, the nanofiber which consists of a polymer solution of type A with respect to the long sheet W conveyed along the conveyance direction a, and Nanofibers consisting of polymer solutions of type B can each be deposited uniformly without imbalance.

In addition, as shown in FIG. 2, the nozzle block 250 is provided in the field emission chamber 212 of the field emission device 200 so as to discharge the polymer solution upward from the discharge port of each nozzle 240. Then, a predetermined polymer solution is discharged from the discharge port of each nozzle 240 while overflowing the polymer solution from the discharge port of each nozzle 240 to electrospin the long sheet W to deposit nanofibers on the long sheet W. Let's do it.

For this reason, the nozzle block 250 has a container shape capable of storing the overflowed polymer solution, and a polymer solution outlet 253 for discharging the polymer solution on the bottom of the nozzle block 250 (see FIG. 3). Is installed. The polymer solution discharge port 253 is connected with a polymer solution discharge pipe 254. If the polymer solution discharged from the polymer solution outlet is recovered for each type of polymer solution, it is also possible to reuse each kind of polymer solution.

In addition, as shown in FIG. 3B, the nozzle block 250 is used in a state where the upper opening surface is covered by the lid 251. Further, a nozzle through hole 252 for protruding the nozzles 240 upward is provided in the lid 251 corresponding to each nozzle 240.

Further, the nozzle block 250 is capable of reciprocating in the width direction of the long seat W by the reciprocating drive unit 255 (see FIG. 5), and furthermore, by the gap adjusting driver 256 (see FIG. 5). The space | interval of the collector 230 is adjustable. These reciprocating drive unit 255 and the gap adjustment drive unit 256 are controlled by the main control unit 300. In addition, since the mechanism for making the nozzle block 250 reciprocate in the width direction of the elongate sheet W, and the mechanism for adjusting the space | interval of the collector 230 can use a well-known mechanism, the specific structure of each mechanism, etc. Omit illustration and description.

However, although the power supply device 260 imparts a predetermined voltage between the collector 230 and each nozzle 240, the embodiment is for imparting a predetermined voltage between the collector 230 and each nozzle 240. In the field radiating device 200 according to the present invention, one electrode (referred to as an anode) of the power supply device 260 is connected to the collector 230, and the other electrode (required to be a cathode) is not a nozzle 240, but a tube 271. 277). Then, the nozzle 240 side, that is, the tube bodies 271 to 277 side are set to the ground potential.

In addition, when the nozzle block 250 is made of a conductive member, and the nozzle block 250 and the tubular bodies 271 to 277 are in an electrically connected state, the cathode of the power supply device 260 is a nozzle block. The negative electrode of the power supply device 260 may be connected to the housing body 210 when the nozzle block 250 and the housing body 210 are electrically connected to each other. In either case, the nozzle 240 side, that is, the tube bodies 271 to 277 side, the nozzle block 250 side, or the housing body 210 side is set to have a ground potential.

In this way, the nozzle 240 and the pipe bodies 271 to 277 are formed by bringing the nozzle 240 side, that is, the pipe bodies 271 to 277 side, the nozzle block 250 side, or the housing body 210 side to the ground potential. ), The nozzle block 250 and the housing body 210, all of the polymer solution and the polymer solution supply device 400 before being discharged from the nozzle 240 become ground potentials.

Thereby, the safety of the operator who operates the electric field emission apparatus 200 and the nanofiber manufacturing apparatus 1 can be ensured, and the polymer solution supply apparatus 400 does not need to make high withstand voltage specification.

The field radiating device 200 configured as described above is preferably installed in a room adjusted to an atmosphere having a temperature of 20 ° C to 40 ° C and a humidity of 20% to 60%.

The main control device 300 has a function of controlling the electric field radiating device 200 and the conveying device 100. Specifically, as shown in FIG. 5, the transfer speed control unit 310 for controlling the transfer speed based on the winding amount measurement information and the reciprocating drive unit 255 for reciprocating the nozzle block 250 are controlled. The reciprocating motion control part 320 and the space | interval adjustment control part 330 which controls the space | interval adjustment drive part 256 for performing the space | interval adjustment of the nozzle block 250 are provided.

In addition to the above control, the main control device 300 has a function of controlling the power supply device 260 and the auxiliary belt device 220 in the electric field radiating device 200, and the heating device 117 in the conveying device 100. ) To control. In addition, when the whole nanofiber manufacturing apparatus 1 is considered, it has a function which controls a VOC processing apparatus (not shown), an inert gas control apparatus (not shown), etc.

If the first tension roller

position adjusting mechanisms

109a and 109b, the second tension roller

position adjusting mechanisms

110a and 110b and the cutting device 114 are provided with a drive unit such as a motor, the first tension roller 107 and the first It is also possible to control the position control of the two tension roller 108 and the cutting control of the cutting device 114 by the main control device 300. When cutting control of the cutting device 114 is performed, when the winding amount of the nanofiber nonwoven fabric reaches a predetermined amount, the field spinning operation by the field spinning device 200 is stopped, and the nano by the winding roller 102 is further stopped. A signal for operating the press plate 115 and the cutter 116 is output in a state where the conveyance operation of the long sheet W such as winding of the fiber nonwoven fabric is stopped. When cutting the nanofiber nonwoven fabric by the cutter 116, the nanofiber nonwoven fabric is cut by the cutter 116 while pressing the nanofiber nonwoven fabric by the pressing plate 115.

2. Nanofiber production method using nanofiber production apparatus according to the embodiment

Hereinafter, the method of manufacturing a nanofiber nonwoven fabric using the nanofiber manufacturing apparatus 1 which concerns on embodiment comprised as mentioned above is demonstrated.

First, the long sheet W is set in the conveying apparatus 100, and after that, it is conveyed by the winding roller 102, supplying the long sheet W from a supply roller, and it conveys at a predetermined conveyance speed. In the field radiating device 200, nanofibers are sequentially deposited by discharging the polymer solution from the nozzles 240 mounted to the respective tubular bodies 271 to 277 to the long sheet W. FIG.

In addition, before starting such an operation, the space | interval between the collector 230 and the nozzle block 250 can be adjusted by the space | interval adjustment drive part 256 at the optimal space | interval. The distance between the collector 230 and the nozzle block 250 may be determined in consideration of the spinning conditions of the field emission device 200, the type of the polymer solution, the average diameter of the nanofibers, and the thickness of the nonwoven fabric to be manufactured. Thereby, electric field emission can be performed in the state in which the space | interval of the nozzle block 250 and the collector 230 was set optimally.

However, in the nanofiber manufacturing apparatus 1 according to the embodiment, a type A polymer solution is stored in the first polymer solution tank 411, and a type B polymer solution is stored in the second polymer solution tank 412. have. Then, the polymer solution of type A distributes the polymer solution distribution pipes 421 to 424 and is supplied to the

tubular bodies

271, 273, 275, and 277, and the polymer solution of type B passes through the polymer solution distribution pipes 425 to 427. It is distributed and supplied to the

tubes

272, 274, 276.

For this reason, the polymer solution of type A and the polymer solution of type B are discharged alternately from each nozzle 240 of each tubular body 271-277 with respect to the long sheet W conveyed along a conveyance direction a. do. Thereby, the long sheet W can deposit nanofibers in a state in which a polymer solution of type A and a polymer solution of type B are mixed.

Further, when the nanofibers are sequentially deposited on the long sheet W, the long sheet W is reciprocated by the reciprocating drive unit 255 while reciprocating the nozzle block 250 in the width direction of the long sheet W. The operation of discharging the polymer solution is performed. In addition, the reciprocating cycle of the reciprocating drive unit 255 is set based on the arrangement pitch of the nozzle 240 and the conveyance speed of the long sheet W. As shown in FIG. That is, with respect to the long sheet W conveyed in the conveyance direction a, the reciprocating cycle is set so that the discharge position of each nozzle 240 may not overlap with the discharge position of another nozzle as much as possible. Thereby, the deposition amount of the polymer fiber of the elongate sheet W can be made uniform.

After depositing the polymer fibers in the long sheet W in this manner, the nanofiber nonwoven fabric can be produced by heating the "long sheet W in which the nanofibers are deposited" with the heating device 117. In addition, in the nanofiber manufacturing apparatus 1 according to the embodiment, as described above, the long sheet W can deposit nanofibers in a state in which different kinds of polymer solutions are mixed, and are produced by heating them. The nanofiber nonwoven fabric becomes a nanofiber nonwoven fabric of a different quality from the nanofiber nonwoven fabric produced by one kind of polymer solution, and can be used for a wider range of applications.

The nanofiber nonwoven fabric thus produced is wound by a winding roller 102. At this time, the winding amount measurement information output device 112 measures the winding amount of the nanofiber nonwoven fabric wound on the winding roller 102, and uses the measurement result as the winding amount measurement information to convey the speed control unit of the main control device 300 ( Output to 310). The conveyance speed control part 310 controls the winding roller drive part 111 so that the conveyance speed of the elongate sheet | seat W may become a fixed speed based on winding amount measurement information.

In addition, when the winding amount becomes a predetermined amount, the nanofiber nonwoven fabric can be cut by the cutting device 114. When cutting a nanofiber nonwoven fabric by the cutting device 114, it cuts by the cutter 116, holding the nanofiber nonwoven fabric by the press board 115. When cutting the nanofiber nonwoven fabric, the field spinning operation by the field spinning device 200 is stopped, and the conveying operation of the long sheet W such as winding the nanofiber nonwoven fabric by the winding roller 102 is stopped. do.

As a result, a predetermined amount of nanofiber nonwoven fabric is wound around the winding roller 102. And the winding roller 102 which the nanofiber nonwoven fabric is not wound up is set, the front end of the subsequent nanofiber nonwoven fabric is wound up to the winding roller 102, and the nanofiber nonwoven fabric which is manufactured sequentially is wound up. By sequentially performing such an operation, the nanofiber nonwoven fabric wound by a predetermined winding amount can be continuously produced.

In addition, the cutting operation by the cutting device 114 can be automatically cut by the main control device 300. That is, in the main controller 300, when the winding amount of the nanofiber nonwoven fabric reaches a predetermined amount, the field spinning operation by the field radiating device 200 is stopped, and the winding of the nanofiber nonwoven fabric by the winding roller 102 is elongated. A signal for operating the pressing plate 115 and the cutter 116 in a state where the conveyance operation of the sheet W is stopped is output. When cutting the nanofiber nonwoven fabric by the cutter 116, the nanofiber nonwoven fabric is cut by the cutter 116 while pressing the nanofiber nonwoven fabric with the pressing plate 115. Thereby, cutting operation | movement can be performed automatically.

Moreover, when it is necessary to adjust the tension of the elongate sheet W and the position of the width direction of the elongate sheet W during the manufacture of a nanofiber nonwoven fabric, the 1st tension roller

position adjustment mechanism

109a, 109b ) And the second tension roller

position adjustment mechanisms

110a and 110b as appropriate, the long sheet W can be optimally tensioned and the long sheet W in the width direction can be optimally positioned. have.

Here, the spinning conditions of the nanofiber manufacturing method according to the embodiment are exemplarily shown. As the long sheet W, a nonwoven fabric, a woven fabric, a knitted fabric, etc. made of various materials can be used. As for the thickness of the elongate sheet W, the thing of 5 micrometers-500 micrometers can be used, for example.

As a polymer used as a raw material of a nanofiber, for example, polylactic acid (PLA), polypropylene (PP), polyvinyl acetate (PVAc), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), and polyethylene naphthalate (PEN), polyamide (PA), polyurethane (PU), polyvinyl alcohol (PVA), polyacrylonitrile (PAN), polyetherimide (PEI), polycaprolactone (PCL), polylactic acid glycolic acid ( PLGA), polyvinylidene fluoride (PVDF), silk, cellulose, chitosan, and the like.

Examples of the solvent used for the polymer solution include dichloromethane, dimethylformamide, dimethyl sulfoxide, methyl ethyl ketone, chloroform, acetone, water, formic acid, acetic acid, cyclohexane, THF, decahydronaphthalene (Decalin), and dimethylformamide. (DMAc) and the like can be used. You may mix and use multiple types of solvent. The polymer solution may contain additives such as conductivity enhancers.

In addition, the conveyance speed of the elongate sheet W can be set to 5 mm / min-10 m / min, for example. The voltage applied to the nozzle, the collector 230, and the nozzle block 250 may be set to 10 kV to 80 kV.

In addition, the temperature of the field emission chamber 212 of the field emission apparatus 200 can be set to 20 degreeC-40 degreeC, for example. The humidity of the field emission chamber 212 can be set to 20% to 60%, for example.

However, when the field spinning is performed, the polymer solution overflowed from the nozzle 240 is discharged from the polymer solution outlet 253 through the polymer solution discharge pipe 254, but the discharged polymer solution is recovered to recover the nanofibers. When reusing as a raw material, it can reuse by providing the polymer solution collection | recovery apparatus which is not shown in figure.

In this case, it is preferable to recover the polymer solution of type A and the polymer solution of type B separately. Then, the recovered type A polymer solution is transferred to the regeneration tank for type A of the polymer solution recovery device, and the recovered type B polymer solution is transferred to the regeneration tank for type B of the polymer solution recovery device, and then recovered. The composition of each polymer solution of one type A and type B is measured, and the process which adds a solvent and other necessary components to each of the polymer solutions of type A and type B according to the said measurement result is performed, respectively.

The polymer solution of type A and type B recovered by such a treatment is recovered from the original type A and type B polymer solution, that is, the type A polymer solution and the second polymer stored in the first polymer solution tank 411. It is possible to regenerate with a polymer solution having a composition that is the same as or very close to that of the type B polymer solution stored in the solution tank 412.

In order to realize this, the nozzle block 250 divides the inside corresponding to each tube 271-277, forms a polymer solution recovery chamber corresponding to each tube 271-277, and each tube 271-277. The polymer solution outlet 253 is provided in each of the polymer solution recovery chambers. Then, each of the polymer solution discharge ports is connected with a polymer solution discharge pipe 254, and the polymer solution of type A and type B discharged through the polymer solution discharge pipe is supplied to a corresponding type of regeneration tank, respectively. . With such a configuration, the overflowed polymer solution can be recovered for each type and can be reproduced for each type.

3.Effects of the field emission device and the nanofiber production device according to the embodiment

According to the field emission device 200 which concerns on embodiment, each nozzle 240 is not attached directly to the nozzle block 250, but is attached to each tubular body 271-277 by predetermined number. For this reason, when repairing or replacing the nozzle 240, only the tubular body which should be repaired or replaced with the nozzle may be removed from the nozzle block 250. As a result, the nozzle can be repaired or replaced in a tubular unit, and management becomes easy. For example, the supply amount of the polymer solution can be controlled for each tube arranged in the width direction of the long sheet W, or a different kind of polymer solution can be supplied for each tube 271-277.

When controlling the supply amount of the polymer solution for each tube 271-277, the polymer solution supply amount control valves 431-437 provided corresponding to each tube 271-277 can be easily implemented. Moreover, as needed, it is also possible not to supply a polymer solution with respect to any specific pipe | tube.

In addition, as described in the above embodiments, the

tubulars

271, 273, 275, and 277 are supplied with a polymer solution of type A, and the

tubulars

272, 274, and 276 are supplied with a polymer solution of type B to the tubular bodies. It is possible to supply a kind of polymer solution. Thereby, the long sheet W can deposit a composite nanofiber in a state in which a polymer solution of type A and a polymer solution of type B are mixed, and the nanofiber nonwoven fabric produced by heating it is a polymer solution of one kind. It becomes the nanofiber nonwoven fabric of a quality different from the nanofiber nonwoven fabric manufactured by this, and can be used for a wider use.

Thus, according to the field emission device 200 which concerns on embodiment, the supply method of a polymer solution can be set variously.

In addition, since the nozzles 240 are attached to each of the tubes 271 to 277 by a predetermined number, when the nozzles 240 are repaired or replaced, only the tubes to which the nozzles should be repaired or replaced are nozzle blocks. What is necessary is just to isolate | separate from 250, and since a nozzle can be repaired or replaced by a tubular unit, the effect which becomes easy management is also acquired.

Moreover, each nozzle 240 mounted in each tubular body 271-277 is the straight line L1, L2 which has inclination of predetermined angle (theta) 1 and (theta) with respect to the conveyance direction a as shown in FIG. It is attached to each pipe body 271-277 so that it may be arranged. For this reason, since the nozzles 240 are shifted from each other in the longitudinal direction of each of the tubular bodies 271-277, the polymer solution can be discharged to the long sheet W without imbalance, and the nanoparticles of high quality having a uniform thickness are provided. Fibers can be produced.

Moreover, according to the field emission device 200 which concerns on embodiment, since the nozzle 240 side, ie, the tube body 271-277 side, the nozzle block 250 side, or the housing body 210 side is made into ground potential, a nozzle The block 250, the housing body 210, the polymer solution before being discharged from each nozzle 240, and the polymer solution supply device 400 all become ground potentials. For this reason, the safety of the operator who operates the electric field emission apparatus 200 and the nanofiber manufacturing apparatus 1 can be ensured, and it is not necessary to make each of these components into a high withstand voltage specification.

Moreover, according to the field emission apparatus 200 which concerns on embodiment, since the nozzle block 250 can be reciprocated by a predetermined period along the width direction of the long sheet W, the nanofiber of the long sheet W is The deposition amount can be made uniform. Moreover, since the space | interval of the nozzle block 250 and the collector 230 can be adjusted, it becomes possible to perform electric field emission on an optimal condition.

Moreover, according to the nanofiber manufacturing apparatus 1 which concerns on embodiment, since the position of each edge part of the 1st tension roller 107 and the 2nd tension roller 108 can be adjusted, the 1st tension roller 107 and the 1st agent are made. It is not only possible to set the tension of the long sheet W between the two tension rollers 108 to an appropriate tension, but also to easily correct the "error" in the width direction of the long sheet W with respect to the conveying direction a. It can carry out easily, and the long sheet W can always be conveyed in a suitable state. Thereby, a high quality nanofiber nonwoven fabric having a uniform thickness can be produced.

Moreover, according to the nanofiber manufacturing apparatus 1 which concerns on embodiment, since the winding amount of the nanofiber nonwoven fabric wound by the winding roller 102 is measured and a conveyance speed is controlled based on the measured winding amount, the field emission apparatus The conveying speed of the elongate sheet W passing through 200 can be maintained at a constant speed, whereby a high quality nanofiber nonwoven fabric having a uniform thickness can be produced.

Moreover, according to the nanofiber manufacturing apparatus 1 which concerns on embodiment, since the cutting device 114 is provided between the heating apparatus 117 and the winding roller 102, when a predetermined amount of nanofiber nonwoven fabric is wound by a winding roller, The nanofiber nonwoven fabric can be cut. In this case, the winding roller which the nanofiber nonwoven fabric is not wound is attached, and the front-end | tip of the subsequent nanofiber nonwoven fabric is connected to the said winding roller. By repeating such an operation, the nanofiber nonwoven fabric in which the predetermined amount of winding is finished can be easily taken out.

4. Variation of Polymer Solution Supply Device 400

FIG. 6 is a diagram for explaining a first modification of the polymer solution supply device 400. 6 (a) shows a case where the tubes 271 to 277 are divided into two groups, and FIG. 6 (b) shows a case where the tubes 271 to 277 are divided into three groups.

FIG. 7 is a diagram for explaining a second modification of the polymer solution supply device 400. FIG. 8 is a diagram for explaining a third modification of the polymer solution supply device 400.

6 to 8 schematically show the polymer solution supply device 400 and the tubular bodies 271 to 277 in a simplified manner. In addition, each nozzle 240 attached to each tubular body 271-277 has abbreviate | omitted illustration.

[First modification]

In the first modification of the polymer solution supply device 400, as shown in FIG. 6 (a), the tube bodies 271 to 277 have a predetermined number of tubes arranged along the conveying direction a as a group. It is set as the structure which supplies a different kind of polymer solution for each group. In the example shown to (a) of FIG. 6, the tube 271-274 is the 1st group G1 among the tube bodies 271-277, and the tube 275-277 is 2nd among the tube bodies 271-277. As the group G2, the polymer solution of type A is supplied to the tubes 271 to 274 of the first group G1, and the polymer solution of the type B is supplied to the tubes 275 to 277 of the second group G2. I am in a constitution.

In addition, the number of groups and the number of tubes in each group are arbitrary. For example, if the number of pipe bodies is seven (pipe bodies 271 to 277) as in the embodiment, as shown in Fig. 6B, the entire body is divided into three groups G1, G2, and G3. The first group G1 is divided into two (pipe bodies 271 and 272), the second group G2 is divided into three tubes (pipes 273 to 275), and the third group G3 is divided into two. A type A polymer solution is supplied to the first group of

tubulars

271 and 272 as a dog (tube bodies 276 and 277), and a type B polymer solution is supplied to the tubular bodies 273 to 275 of the second group. It is also possible to supply a polymer solution of type A to the

tubular bodies

276 and 277 of the third group.

In addition, if a polymer solution of a type C different from the types A and B can be used, it is also possible to supply a type C polymer solution to the

tubular bodies

276 and 277 of the third group.

According to the first modification, in the nanofiber nonwoven fabric produced by FIG. 6A, nanofibers composed of a polymer solution of type A are deposited on the surface of the elongated sheet W, and a polymer solution of type B is deposited thereon. When the nanofibers formed are deposited, and the nanofiber nonwoven fabric produced by FIG. 6B is added to the polymer solution of type A and type B as a polymer solution, a polymer solution of type C is used. On the surface of (W), nanofibers composed of polymer solution of type A are deposited, nanofibers composed of polymer solution of type B are deposited thereon, and nanofibers composed of polymer solution of type C are deposited thereon.

[Second modification]

As shown in FIG. 7, the second modification of the polymer solution supply device 400 is a polymer solution distribution pipe for circulating a polymer solution of type A connected to each polymer solution supply port of each tube 271 to 277. The polymer solution distribution pipe 420A is a polymer solution distribution pipe 421 to 424 for distributing the 421 to 424 and the type B polymer solutions to each of the polymer solution distribution pipes 420A and 420B. It connects to the 1st polymer solution tank 411, and the said polymer solution flow pipe 420B is connected to the 2nd polymer solution tank 412.

When the polymer solution supply device 400 is configured as shown in FIG. 7, the polymer solution supply amount control valves 431 to 437 (not shown in FIG. 7) correspond to the respective tubular bodies 271 to 277 as in FIG. 3. Although it is a matter of course, it may be provided in the polymer solution distribution pipes 421 to 427, but if it is possible to control the supply amount collectively for each type of polymer solution, as shown in FIG. 7, the polymer solution distribution pipe 420A ) Is provided with a polymer solution supply amount control valve 430A for controlling the supply amount of a type A polymer solution, and the polymer solution distribution pipe 420B has a polymer solution supply amount control valve for controlling the supply amount of a type B polymer solution ( It is also possible to install 430B). By setting it as such a structure, supply amount can be collectively controlled for every kind of polymer solution.

In addition, of course, the structure of the polymer solution distribution pipe shown in the 2nd modification is also applicable to the polymer solution supply apparatus 400 shown in the 1st modification shown in FIG.

[Third modification]

As shown in FIG. 8, the third modified example of the polymer solution supply device 400 is configured to provide a plurality of polymer solution storage chambers by dividing the inside of one tank (referred to as the polymer solution tank 413). will be. That is, in the nanofiber manufacturing apparatus 1 according to the embodiment described above, two types of polymer solutions (type A polymer solution and type B polymer solution) are used. Polymer

solution storage chambers

413A and 413B (hereinafter referred to as first polymer solution storage chamber 413A and second polymer solution storage chamber 413B) are provided. The first polymer solution storage chamber 413A is a polymer solution storage chamber for storing a polymer solution of type A, and the second polymer solution storage chamber 413 B is a polymer solution storage chamber for storing a polymer solution of type B. do.

The piping method of the polymer solution distribution pipes 421 to 427 from the first polymer solution storage chamber 413A and the second polymer solution storage chamber 413B to the respective pipe bodies 271 to 277 is the same as described in the above embodiment (Fig. 3), the polymer solution of type A and the polymer solution of type B may be alternately supplied to each tube 271 to 277, and the first modification (see FIG. 6) or the second modification (see FIG. 7) may be used. The supply method shown may be sufficient.

As mentioned above, although this invention was demonstrated based on the said embodiment, this invention is not limited to the said embodiment, Various deformation | transformation implementation is possible in the range which does not deviate from the summary, For example, the deformation | transformation figure shown below is It is possible.

(1) In the above embodiment, the type of polymer solution has been described in the case of two types (polymer solution of type A and polymer solution of type B), but the type of polymer solution is not limited to two types, good.

(2) In the said embodiment, although the number of pipe bodies was seven pieces (pipe bodies 271-277), it is not limited to seven pieces. In addition, the number of nozzles attached to each tube does not necessarily need to be the same number in each tube.

(3) In the said embodiment, each tubular body 271-277 does not need to be installed so that it may orthogonally cross with respect to a conveyance direction a on the plane parallel to the elongate sheet | seat W, and has a slight inclination with respect to a conveyance direction a. It may be installed with the.

(4) In the said embodiment, although the case where there was one electrospinning apparatus 200 was demonstrated to an example, this invention is not limited to this. For example, two or more field emission devices may be provided.

(5) In the above embodiment, the nanofiber production apparatus of the present invention has been described using the field emission device 200 having the nozzle block 250 in which the nozzle 240 is in an upward direction. It is not limited. For example, the present invention can also be applied to a nanofiber production apparatus having an electric field spinning device having a nozzle block in which the nozzle is in a downward direction or a field spinning device having a nozzle block in which the nozzle is in a horizontal direction.

(6) In the above embodiment, the case where the positive electrode of the power supply device 260 is connected to the collector 230 and the negative electrode of the power supply device 260 is connected to the tubular bodies 271 to 277 has been described by way of example. Is not limited to this. For example, the negative electrode of the power supply device 260 may be connected to the collector 230, and the positive electrode of the power supply device 260 may be connected to the tubular bodies 271 to 277.

(7) Although the above-mentioned embodiment does not mention the countermeasure when the abnormality occurs when performing the field radiation, the abnormality occurred in the field radiation apparatus 200 while continuously operating the field radiating apparatus 200 for a long time. In this case, it is also possible to have a function that makes it possible to detect the abnormality immediately.

For example, the power supply device 260 has a function of measuring the amount of current and transmitting the measured value to the main control device 300, and the main control device 300 has an abnormal amount of current of the power supply device 260. In the case of a value, it is possible to have a function of controlling the power supply 260.

Thereby, when electric field emission is performed in the state which applied the predetermined voltage between the collector 230 and the tube bodies 271-277, the electric current more than an upper limit to the electric field radiator 200 is supplied from the power supply device 260. When detecting that it is being done, the main control device 300 can control the power supply device 260 to stop the current supply. On the contrary, when the electric field radiator 200 detects that the electric current below the lower limit is supplied from the power supply device 260, the main control device 300 controls the power supply device 260 to give a warning signal of abnormality. It is possible.

In addition, when the main controller 300 controls the power supply unit 260 to stop the current supply, the main controller 300 emits inert gas to the field radiating apparatus 200 with respect to the inert gas supply device (not shown). The signal to be supplied to the electric field radiation chamber 212 may be transmitted. This makes it possible to prevent an accident such as a fire in advance and to realize a nanofiber manufacturing apparatus with higher safety.

(8) Although the shape and the like of the nozzle 240 are not mentioned in the above embodiment, it is also possible to use, for example, a nozzle having a shape in which the tip of the nozzle is cut along a plane intersecting obliquely with the central axis of the nozzle 240. It is possible. By setting the nozzle tip in such a shape, the polymer solution which overflows from the nozzle tip flows quickly without remaining in the nozzle tip. For this reason, the amount of solvent volatilized from the polymer solution in the process of electric field spinning can be made very small, and the amount of polymer solidified in the vicinity of the discharge port of the nozzle 240 can be made very small.

(9) In the said embodiment, although the conveyance speed of the elongate sheet W was made constant by controlling the conveyance speed by the winding amount of the nanofiber nonwoven fabric wound by the winding roller 102, conveyance by the winding amount In addition to controlling the speed, for example, the ventilation of the deposited nanofibers or the thickness of the deposited nanofibers can be measured, and the conveyance speed can be appropriately controlled based on the measurement results. In this case, the conveyance speed is controlled such that the air permeability of the deposited nanofibers or the thickness of the deposited nanofibers is as close as possible to a predetermined value. This makes it possible to produce nanofiber nonwoven fabrics having a uniform air permeability or thickness.

In addition, the air permeability of the nanofiber in this case means the air permeability at the time of measuring the air permeability in the state which the nanofiber layer deposited on the elongate sheet W and the elongate sheet W were laminated | stacked. In addition, the thickness of a nanofiber means the thickness at the time of measuring the thickness in the state which the nanofiber layer deposited on the elongate sheet W and the elongate sheet W were laminated | stacked.

(10) Although the above embodiment exemplifies a case in which one nozzle block is provided in one field radiating device 200, the present invention is not limited thereto, and for example, two pieces of one field radiating device 200 are provided. The structure which has more than one nozzle block may be sufficient. In this case, as described in the above embodiments, each nozzle block is arranged with a predetermined number of pipes provided with a predetermined number of nozzles. In addition, it is also possible to adjust the space between the reciprocating motion and the collector 230 for each nozzle block.

In addition, when reciprocating for each nozzle block, each nozzle block may be reciprocated by the same period, and each nozzle block may be reciprocated by another period. In addition, when adjusting the space | interval between the collectors 230 for each nozzle block, each nozzle block may be set to the same space | interval, and each nozzle block may be set to a different space | interval.

(11) The structure of the polymer solution supply apparatus 400 is the structure shown in the said embodiment (refer FIG. 3), the structure shown in 1st modification (refer FIG. 6), and the structure shown in a 2nd modification (refer FIG. 7). It is not limited to this, Various modifications are possible.

(12) Although the case where the heating apparatus 117 is provided in the conveyance apparatus 100 was illustrated in the said embodiment, when it is not necessary to provide a heating apparatus depending on the kind of nanofiber to manufacture, the model of a nanofiber manufacturing apparatus, etc. There is also.

Claims

A nozzle block having a collector, a plurality of nozzles disposed in a position opposite to the collector and discharging a polymer solution in two dimensions, a polymer solution supply device for supplying the polymer solution to the nozzle, the collector and the An electric field radiator comprising: a power supply device for applying a high voltage between nozzles, and depositing the nanofibers by discharging the polymer solution to a long sheet that is conveyed between the collector and the nozzle in a predetermined conveying direction. In

The polymer solution supply device,

A polymer solution tank for storing a plurality of types of polymer solutions having different components, and a plurality of polymer solution distribution pipes for distributing the plurality of types of polymer solutions for each type of polymer solution,

The nozzle block,

It is provided along the width direction of the said elongate sheet, and one end part is obstructed.
Iv) a plurality of pipes, each of which is a polymer solution supply port, the other end being provided along the conveying direction of the long sheet, wherein the nozzles are provided in the pipes of the pipes in the longitudinal direction of the pipes. And a polymer solution distribution pipe for circulating the polymer solution of the type assigned to the tube so that a polymer solution of the type assigned to the tube is supplied to each polymer solution supply port of each tube. The field emission device characterized in that.
The method of claim 1,

Each said tube body is detachably attached to the said nozzle block, The field emission apparatus characterized by the above-mentioned.
The method according to claim 1 or 2,

And said polymer solution supply pipe is provided in said polymer solution distribution pipe corresponding to each of said tubes in order to control the amount of supply of the polymer solution to each of said tubes.
The method according to any one of claims 1 to 3,

And the polymer solution supply amount control valve is provided in the polymer solution distribution pipe so as to collectively control the supply amount of the polymer solution for each type of the polymer solution.
The method according to any one of claims 1 to 4,

And said polymer solution tank is provided separately for each type of said polymer solution.
The method according to any one of claims 1 to 4,

And the polymer solution tank is divided inside such that a plurality of polymer solution storage chambers capable of storing the plurality of polymer solutions for each type of polymer solution are formed.
The method according to any one of claims 1 to 6,

When the nozzles attached to the respective tubular bodies are viewed along the conveying direction, the nozzles mounted on the respective tubular bodies have heat in the conveying direction by the nozzles mounted on the respective tubular bodies to which the same kind of polymer solution is assigned. The field radiating apparatus according to claim 1, wherein the pipes are mounted to the respective tubes so as to be arranged on a straight line having an inclination of a predetermined angle with respect to the conveying direction on a plane parallel to the plane.
The method according to any one of claims 1 to 7,

Each nozzle and each tube is made of a conductive member, one of the positive and negative electrodes of the power supply is connected to the collector, and the other of the positive and negative electrodes of the power supply is connected to the respective tubes, The field radiating apparatus characterized by the above-mentioned side of each tubular body being a ground potential.
The method according to any one of claims 1 to 8,

And a reciprocating drive unit for reciprocating the nozzle block at a predetermined cycle along the width direction of the long sheet.
The method according to any one of claims 1 to 9,

And an interval adjusting driver for driving the nozzle block to adjust the gap between the nozzle block and the collector.
As a nanofiber manufacturing apparatus provided with the conveying apparatus which conveys a long elongate sheet to a predetermined conveyance direction, and the electric field spinning apparatus which electric-field spins the elongate sheet conveyed in the said predetermined conveyance direction,

The field spinning device is a field spinning device according to any one of claims 1 to 10.
The method of claim 11,

The conveying device,

A feed roller for supplying the long sheet,

A winding roller which conveys the long sheet at a predetermined conveying speed and winds the long sheet on which the nanofibers are deposited in the field spinning apparatus;

A winding roller driving unit for driving the winding roller, and

It is provided in the said supply roller side and the said winding roller side rather than the said field radiating apparatus, The nanofiber manufacturing apparatus characterized by including the 1st tension roller and a 2nd tension roller for giving a predetermined tension to the said elongate sheet | seat. .
The method of claim 12,

The first tension roller includes a first tension roller position adjustment mechanism that enables independent adjustment of at least one position in each of the ends in the vertical direction and the horizontal direction of one end portion and the other end portion of the first tension roller. and,

The second tension roller includes a second tension roller position adjustment mechanism that enables independent adjustment of at least one position in each of the vertical and horizontal directions of one end portion and the other end portion of the second tension roller. Nanofiber manufacturing apparatus, characterized in that.
The method according to claim 12 or 13,

The conveying device,

A winding amount measurement information output device for outputting winding amount measurement information indicating a winding amount of the long sheet on which the nanofibers of the winding roller are deposited;

And a conveying speed control device for controlling the winding roller drive unit based on the winding amount measurement information output from the winding amount measurement information output device.
The method according to any one of claims 12 to 14,

The conveying device,

And a cutting device provided at a predetermined position between the electric field radiating device and the winding roller, for cutting the long sheet on which the nanofibers are deposited along the width direction of the long sheet.