JP2005264353A - Method and apparatus for manufacturing fiber assembly - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method and a production apparatus capable of producing a fiber assembly having a uniform fiber amount in the width direction of the fiber assembly.
SOLUTION: A supply means having two or more spinning stock solution supply sections arranged in a straight line, capable of supplying a spinning stock solution, and applying an electric field to the spinning stock solution supplied by the supply means to draw and fiberize the spinning solution. An application means capable of collecting, a collector that can directly collect the fibers, and an insulator that is present outside the two spinning dope supply units located at the extreme ends in the width direction of the collector. It is a manufacturing device. Moreover, it is a manufacturing method of the fiber assembly using this manufacturing apparatus.
[Selection] Figure 1

Description

  The present invention relates to a method and apparatus for manufacturing a fiber assembly.

  If the fiber diameter of the fibers constituting the fiber assembly is small, the fiber assembly is configured because it has excellent performance such as separation performance, liquid retention performance, wiping performance, concealment performance, insulation performance, or flexibility. The fiber diameter of the fiber is preferably small. As a method for producing a fiber aggregate composed of fibers having such a small fiber diameter, the spinning dope is extruded from a nozzle, and an electric field is applied to the extruded spinning dope to stretch the spinning dope to obtain a fiber having a small fiber diameter. A so-called electrostatic spinning method is known in which fibers are directly collected to form a fiber assembly.

  More specifically, “in an apparatus for producing a highly porous polymer web by charge-induced spinning of a polymer material, a barrel in which at least one polymer material in a liquid state is stored; A pump that pressurizes and supplies the stored liquid polymer material; a spinning unit that ejects the liquid polymer material supplied by the pump through at least one charged nozzle; and a nozzle that is discharged through the nozzle of the spinning unit. While laminating a first high voltage generator for supplying a charge for charging a polymer substance to any one polarity and a spinning charged to a polarity different from the charging polarity of the spinning unit and discharged by the nozzle A nozzle for transferring and forming a polymer web, wherein the nozzle is a uni-nozzle or a plurality of needles having a single needle for discharging a liquid polymer material. Polymeric web production apparatus "is disclosed in a multi-nozzle made (Patent Document 1). However, when a polymer web is manufactured using such a manufacturing apparatus, in the width direction of the polymer web (direction perpendicular to the conveying direction by the collector), the amount of fibers at the center is large, and the amount of fibers at both ends. Only a low polymer web could be produced.

JP 2002-201559 A (Claim 1, Claim 4, etc.)

  The present invention has been made for the purpose of solving the above-mentioned problems, and provides a method and an apparatus for manufacturing a polymer web, that is, a fiber assembly having a uniform fiber amount in the width direction of the fiber assembly. For the purpose.

  As a result of diligent research, the present inventors found that the amount of fiber in the width direction of the fiber assembly varies in the conventional manufacturing method is discharged from the nozzles located at both ends in the width direction of the fiber assembly and spun. It was found that the fiber was affected by the electric field formed by the electric charge of the spinning dope discharged from the adjacent nozzle. The present invention has been made based on such knowledge.

  The invention according to claim 1 of the present invention includes: “a step of supplying a spinning solution from two or more spinning solution supply units arranged in a straight line; and applying an electric field to the supplied spinning solution to draw and fiberize A fiber collecting step of directly collecting the collected fibers on the collecting body to form a fiber assembly, and supplying both spinning stock solutions located at the end in the width direction of the collecting body. A method for producing a fiber assembly, wherein the fiber accumulation step is performed in a state where an insulator is present outside the portion. The surface of the insulator thus present is a potential having the same sign as that of the spinning stock solution by the electric field formed by the spinning stock solution supplied from both spinning stock supply units located at the end in the width direction of the collector. The spinning dope supplied from the two spinning dope supply units located at the ends in the width direction of the collection body is spread by the electric repulsion by the insulator surface, that is, the fiber accumulation position. Is prevented from spreading. Therefore, fibers can be accumulated according to the arrangement of the spinning dope supply section, and a fiber assembly having a uniform fiber amount in the width direction can be manufactured.

  The invention according to claim 2 of the present invention is “a supply step of supplying a spinning stock solution from three or more spinning stock supply units arranged in a non-linear manner, and applying an electric field to the supplied spinning stock solution to draw and draw fibers A fiber collecting step of directly collecting the collected fibers on the collecting body to form a fiber assembly, and a fiber assembly manufacturing method, wherein both spinning dope located at the end in the width direction of the collecting body The fiber assembly is characterized in that the fiber accumulation step is performed in a state where an insulator is present outside the supply unit and outside the both spinning stock solution supply units located at the end most in the traveling direction of the collection body. It is a manufacturing method of a body. When three or more spinning stock supply units are arranged in a non-linear manner, not only the influence of the electric field formed by the electric charge of the spinning stock solution discharged from the spinning stock supply unit adjacent in the width direction of the collecting body The fiber assembly is affected by the electric field formed by the electric charge of the spinning dope discharged from the spinning dope supply section adjacent to the traveling direction of the collecting body, and the amount of fibers in the width direction is not uniform due to the synthesizing action of these electric fields. It is easy to become a body. Therefore, in the second aspect, as in the first aspect, the electrical repulsive force of the insulator outside the two spinning stock solution supply portions located at the endmost portions in the width direction of the collector is used, and the collector is used. By utilizing the electric repulsive force of the insulator outside the two spinning stock supply parts located at the extreme ends in the traveling direction, the electric field synthesis action is suppressed and the spinning stock solution spreads, that is, the fiber accumulation position It is possible to suppress the spread and accumulate the fibers according to the arrangement of the spinning dope supply unit to manufacture a fiber assembly having a uniform fiber amount in the width direction.

  The invention according to claim 3 of the present invention is as follows: “Supply means for supplying a spinning stock solution having two or more spinning stock solution supply portions arranged in a straight line, an electric field acting on the spinning stock solution supplied by the supply means” An application means that can be drawn and fiberized, a collector that can directly collect the fibers, and an insulator that is present outside the two spinning dope supply parts located at the extreme ends in the width direction of the collector, and A device for manufacturing a fiber assembly ”characterized by comprising: In this manufacturing apparatus, an insulator is present on the outer side of the two spinning dope supply units located at the end in the width direction of the collector, and this insulator is located at the end in the width direction of the collector. Both spinning dope supply parts located at the end in the width direction of the collector are charged by the electric field formed by the electric charge of the spinning dope supplied from both spinning dope supply parts to the same sign as the spinning dope. Since the spinning stock solution supplied from is able to suppress the spread of the spinning stock solution, that is, the spread of the fiber accumulation position, by the electric repulsive force of the insulator surface, the fibers can be collected according to the arrangement of the spinning stock solution supply unit. A fiber assembly having a uniform fiber amount in the width direction can be produced.

  The invention according to claim 4 of the present invention is as follows: “Supply means for supplying a spinning stock solution having three or more non-linearly arranged spinning stock supply units, an electric field acting on the spinning stock solution supplied by the supply means” And an application means that can be drawn and fiberized, a collector that can directly collect the fibers, an insulator that is present outside the two spinning dope supplies located at the end in the width direction of the collector, and An apparatus for manufacturing a fiber assembly, comprising: an insulator that is present on the outer side of both spinning solution supply units located at the end in the traveling direction of the collector. Since this manufacturing apparatus has an insulator outside the two spinning dope supply parts located at the endmost in the width direction of the collector, the electrical repulsive force of this insulator is used and the traveling direction of the collector Insulators also exist outside the two spinning stock supply units located at the extreme ends in the case, and by using the electrical repulsive force of this insulator, the action of synthesizing the electric field is suppressed and the spinning stock solution is spread. That is, it is possible to suppress the spread of the fiber accumulation position, accumulate the fibers according to the arrangement of the spinning dope supply unit, and manufacture a fiber assembly having a uniform fiber amount in the width direction.

  According to the method and apparatus for manufacturing a fiber assembly of the present invention, a fiber assembly having a uniform fiber amount in the width direction can be manufactured.

The fiber assembly production method and production apparatus according to the present invention will be described with reference to FIG. 1, which is a schematic cross-sectional view of a fiber assembly production apparatus in which four spinning dope supply units are arranged linearly. The fiber assembly manufacturing apparatus of FIG. 1 is a spinning stock solution supply device 1 that can supply a spinning stock solution to nozzles 2 ₁ , 2 ₂ , 2 ₃ , and 2 ₄ that are spinning stock solution supply units, and spinning that is supplied from the spinning stock solution supply device 1. Nozzles 2 ₁ , 2 ₂ , 2 ₃ , 2 ₄ , nozzles 2 ₁ , 2 ₂ , 2 ₃ , 2 ₄ that can discharge the stock solution, voltage application device 3 that can apply voltage to nozzles 2 ₁ , 2 ₂ , 2 ₃ , 2 ₄ , nozzles 2 ₁ , 2 ₂ , 2 ₃ , 2 discharged from the _4, grounded collecting member 4 can collect the fibers drawn by the electric field, the insulator which is located outside the nozzles 2 ₁ and the nozzle 2 ₄ located closest to the end portion in the width direction of the collecting member 4 5a, 5b, the nozzle 2 ₁ , 2 ₂ , 2 ₃ , 2 ₄ and the collector 4, the gas supply device 8 that can supply the desired gas to the spinning vessel 7, and the gas in the spinning vessel 7 An exhaust device 9 capable of exhausting is provided.

  When a fiber assembly is manufactured using such a manufacturing apparatus, first, a spinning dope is prepared. This spinning solution is a solution in which a resin that can be electrospun is dissolved in a solvent. The resin is not particularly limited as long as it can be electrospun, but for example, polyethylene glycol, partially saponified polyvinyl alcohol, fully saponified polyvinyl alcohol, polyvinyl pyrrolidone, polylactic acid, polyglycolic acid, polyacrylonitrile, polymethacrylic acid, polymethacrylic acid. Methyl acid, polycarbonate, polystyrene, polyamide, polyimide, polyethylene, or polypropylene can be used. Resins other than those exemplified above can also be used, and a solution in which two or more resins including those other than those exemplified are dissolved in a solvent (that is, a spinning dope) can also be used.

  The solvent varies depending on the resin, and is not particularly limited. For example, water, acetone, methanol, ethanol, propanol, isopropanol, tetrahydrofuran, dimethyl sulfoxide, 1,4-dioxane, pyridine, N, N -Dimethylformamide, N, N-dimethylacetamide, N-methyl-2-pyrrolidone, acetonitrile, formic acid, toluene, benzene, cyclohexane, cyclohexanone, carbon tetrachloride, methylene chloride, chloroform, trichloroethane, ethylene carbonate, diethyl carbonate, propylene carbonate And so on. One type of solvent may be sufficient and what mixed two or more types of solvents may be used.

The spinning dope of the present invention is obtained by dissolving the resin as described above in a solvent. The concentration varies depending on the resin composition, the resin molecular weight, the solvent, and the like, but is not particularly limited. From the viewpoint of applicability to electrospinning, the concentration is preferably in the range of 10 to 6000 mPa · s, and more preferably in the range of 20 to 5000 mPa · s. This is because if the viscosity is less than 10 mPa · s, the solvent does not evaporate and the fiber tends not to be formed, and if the viscosity exceeds 6000 mPa · s, the spinning dope becomes difficult to be drawn and tends to be a fiber. The “viscosity” refers to a value at a shear rate of 100 s ⁻¹ measured at a temperature of 25 ° C. using a viscosity measuring device.

Such a spinning stock solution is supplied to the nozzles 2 ₁ , 2 ₂ , 2 ₃ , 2 ₄ by the spinning stock solution supply device 1 (supplying step). The supplied spinning dope is discharged from the nozzles 2 ₁ , 2 ₂ , 2 ₃ , 2 ₄ and the nozzles 2 ₁ , 2 ₂ , 2 ₃ , applied by the grounded collector 4 and the voltage applying device ₃ . 2 is subjected to a drawing action by an electric field between the two and ₄ and flies toward the collecting body 4 while being fiberized (so-called electrostatic spinning method). The flying fibers are directly accumulated on the collection body 4 to form a fiber assembly (fiber accumulation step).

In the present invention, the pressure applied to each nozzle 2 ₁ , 2 ₂ , 2 ₃ , 2 ₄ is made the same so that the discharge amount of the spinning dope is made uniform so that a fiber assembly having a uniform fiber amount in the width direction can be produced. Is preferred. Therefore, it is preferable to use, for example, a syringe pump, a tube pump, a dispenser or the like as the spinning dope supply apparatus 1.

Also, the electric field formed by the electric charge of the spinning dope discharged from each nozzle 2 ₁ , 2 ₂ , 2 ₃ , 2 ₄ is made the same, the fiber accumulation position is made uniform, and the fiber amount in the width direction is The pitch of the nozzles 2 ₁ , 2 ₂ , 2 ₃ , 2 ₄ is preferably the same so that they can be the same. In addition, since the pitch of the nozzle changes depending on the resin, solvent, and the like constituting the spinning dope, it is possible to discharge uniformly and determine a pitch with a large total discharge amount by repeating experiments as appropriate. For example, when a spinning stock solution in which polyvinyl alcohol is dissolved in water or a spinning stock solution in which polyacrylonitrile is dissolved in N, N-dimethylformamide is used, when the pitch is 2 to 4 cm, both uniform discharge performance and total discharge amount are obtained. It was confirmed to be excellent.

The pushing direction of the spinning dope from the nozzles 2 ₁ , 2 ₂ , 2 ₃ , 2 ₄ in FIG. 1 is the same as the direction of gravity action. However, the direction of extrusion of the spinning dope from the nozzles 2 ₁ , 2 ₂ , 2 ₃ , 2 ₄ may be different from that in FIG.

The diameters of the nozzles 2 ₁ , 2 ₂ , 2 ₃ , 2 ₄ for extruding the spinning dope are not particularly limited because they vary depending on the fiber diameter of the fiber to be obtained. For example, the fiber diameter of the fiber is 0 when the .7μm below, the nozzle _{2 1,} 2 _2, 2 3, _{2 4} of diameter (inside diameter) is preferably about 0.1 to 2.0 mm. The diameters (inner diameters) of the nozzles 2 ₁ , 2 ₂ , 2 ₃ , 2 ₄ may all be the same, some may be the same, or all may be different.

The nozzles 2 ₁ , 2 ₂ , 2 ₃ , 2 ₄ may be made of metal or non-metal (for example, polytetrafluoroethylene). If the nozzles 2 ₁ , 2 ₂ , 2 ₃ , 2 ₄ are made of metal, the nozzles 2 ₁ , 2 ₂ , 2 ₃ , 2 ₄ are used as one electrode by applying a voltage from the voltage application device 3. If the nozzles 2 ₁ , 2 ₂ , 2 ₃ , 2 ₄ are non-metallic, an electrode is installed inside the nozzles 2 ₁ , 2 ₂ , 2 ₃ , 2 ₄ , and the internal electrodes By applying a voltage from the voltage application device 3, an electric field can be applied to the extruded spinning dope. The materials of the nozzles 2 ₁ , 2 ₂ , 2 ₃ , 2 ₄ may all be the same, some of them may be the same, or all may be different. It is preferable that they are all the same so that the same electric field is easily applied.

1 is the needle-like nozzles 2 ₁ , 2 ₂ , 2 ₃ , 2 _4. However, the present invention is not limited to this mode. For example, a hole is formed in a tube, and this hole is supplied to the spinning stock solution. It can also be used as a part.

In FIG. 1, a voltage is applied to the nozzles 2 ₁ , 2 ₂ , 2 ₃ , 2 ₄ by the voltage application device 3 and an electric field is formed by grounding the collector 4. In addition, the nozzles 2 ₁ , 2 ₂ , 2 ₃ , 2 ₄ may be grounded, and a voltage may be applied to the collector 4 to form an electric field, or the nozzles 2 ₁ , 2 ₂ , 2 ₃ , 2 ₄ and Although a voltage is applied to both of the collectors 4, an electric field may be formed by applying a voltage difference. The electric field varies depending on the fiber diameter, the distance between the nozzles 2 ₁ , 2 ₂ , 2 ₃ , 2 ₄ and the collector 4, the solvent of the spinning dope, the viscosity of the spinning dope, and is not particularly limited. However, it is preferable that it is 0.2-5 kV / cm. When the electric field strength exceeds 5 kV / cm, there is a tendency that dielectric breakdown of air tends to occur. When the electric field strength is less than 0.2 kV / cm, there is a tendency that the spinning dope is not sufficiently stretched and hardly forms a fiber shape.

  The voltage application device 3 is not particularly limited, and for example, a direct current high voltage generator or a Van de Graf generator can be used. The applied voltage is not particularly limited as long as the electric field strength can be set as described above, but is preferably about 5 to 50 KV.

In addition, the polarity of the voltage to be applied may be either positive or negative, but the nozzles 2 ₁ , 2 ₂ , and 2 are used so that the fiber spread is suppressed and the fiber aggregate in which the fibers are uniformly dispersed can be easily manufactured. It is preferable that the 2 ₃ and 2 ₄ sides have a positive potential. In particular, to make it easier to suppress the corona discharge when a voltage is applied, the collecting member 4 and the ground, by applying a nozzle _{2 1,} 2 _2, 2 3, _{2 4} positively, the nozzle _{2 1,} 2 2, _{2 3} preferably 2 ₄ is made to be a positive potential.

In FIG. 1, a single voltage application device 3 is used to apply to the nozzles 2 ₁ , 2 ₂ , 2 ₃ , 2 ₄ , but two or more voltage application devices can also be used. For example, a voltage applying device corresponding to the number of nozzles may be used, and the voltage applying device may be connected to each nozzle for application.

  Although the collection body 4 in FIG. 1 is a flat plate, it should just be a thing which can collect a fiber, and is not specifically limited. For example, a non-woven fabric, a woven fabric, a knitted fabric, a net, a drum, or a belt made of a conductive material such as metal or carbon or a non-conductive material such as an organic polymer can be used as the collecting body 4. In some cases, a liquid such as water or an organic solvent can be used as a collector.

As shown in FIG. 1, when the collector 4 is used as the other electrode, the collector 4 is preferably made of a conductive material (for example, made of metal) having a volume resistivity of 10 ⁹ Ω · cm or less. . On the other hand, when a conductive material is disposed as a counter electrode behind the collector 4 as viewed from the nozzles 2 ₁ , 2 ₂ , 2 ₃ , 2 ₄ side, the collector 4 is necessarily made of a conductive material. There is no. As in the latter case, when the counter electrode is arranged behind the collector 4, the collector 4 and the counter electrode may be in contact with each other or may be separated from each other.

In the manufacturing apparatus of FIG. 1 in which the method for manufacturing a fiber assembly according to the present invention can be carried out, the insulators 5a and 5b are disposed outside the nozzles 2 ₁ and 2 ₄ located at the end portions in the width direction of the collecting body 4. Each exists. Thus the insulating material 5a, 5b are present, by an electric field the surface of the insulator 5a is formed by the charge possessed by the spinning solution supplied from the nozzle 2 _1, charged spinning solution and the same sign of the potential spreads the spinning solution supplied from the nozzle 2 _1, i.e. spread of the fibers are electrically suppressed, similarly, the electric field the surface of the insulator 5b is formed by the charge possessed by the spinning solution supplied from the nozzle 2 ₄ by, charged spinning solution and the same sign of the potential spread of the spinning solution supplied from the nozzle 2 _4, i.e. spread of the fibers are electrically suppressed, the fiber amount in the width direction to produce a uniform fiber aggregate be able to.

The “insulator” in the present invention refers to a material having a volume resistivity value of 10 ¹² Ω · cm or more, and a volume resistivity value of 10 ¹⁴ Ω · cm or more so that the above-described effects can be easily achieved. Is preferred. More specifically, polytetrafluoroethylene, polypropylene, polyethylene, polyester, acrylic, nylon, vinyl chloride and the like can be exemplified.

  In the manufacturing apparatus of FIG. 1, the plate-like insulators 5a and 5b are arranged, but need not be plate-like, and may be a film, a mesh, or a coating film on a spinning vessel 7 or a separately installed support. There may be. In addition, one insulator and the other insulator may be made of the same material or may be made of different materials, so that the degree of charging on the insulator surface is the same, An insulator having the same volume resistivity value is preferable.

  Further, the insulators 5a and 5b in FIG. 1 extend from the collector 4 to the upper end of the nozzle (the end in the direction opposite to the collector 4), but are shorter than the insulators 5a and 5b in FIG. It may be installed from the collector to the lower end of the nozzle (end of the collector 4 side), or may be installed only in the vicinity of the collector. In addition, when installing only in the collector vicinity, it is preferable to arrange | position an insulator outside a collector so that a fiber may not accumulate outside an insulator.

Furthermore, the insulator 5a, although 5b is present, respectively outside the two nozzles ₂ 1, _{2 4,} the distance of the nozzles _{2 1} and the insulator 5a, and the distance of the nozzle _{2 4} and the insulator 5b is It is preferable that the nozzle pitch is equal to 1/3 of the nozzle pitch. By a such distance, the influence of the electric field supplied from the influence of an electric field to provide the nozzle 2 ₂ to the nozzle 2 ₁ insulator 5a to the nozzle 2 ₁ is the same level, to suppress the spreading of the fibers from the nozzle 2 ₁ Cheap. Similarly, the influence of the electric field supplied from the influence of an electric field to provide the nozzle 2 ₃ to the nozzle 2 ₄ insulator 5b to the nozzle 2 ₄ becomes comparable, easily suppressed the spread of the fibers from the nozzle 2 _4.

In FIG. 1 where the manufacturing method of the present invention can be carried out, the nozzles 2 ₁ , 2 ₂ , 2 ₃ , 2 ₄ , the collector 4 and the insulators 5 a and 5 b as described above are accommodated in a spinning container 7, A gas supply device 8 and an exhaust device 9 are connected to the spinning container 7. Therefore, it is easy to set the environment in the spinning container, that is, the spinning space 6 between the nozzles 2 ₁ , 2 ₂ , 2 ₃ , 2 ₄ and the collector 4 to a desired environment. For example, the spinning space 6 can be set to a predetermined relative humidity by supplying a gas having a predetermined relative humidity from the gas supply device 8. By adjusting the relative humidity in this way, the influence of the relative humidity on the spinning dope can be made constant, so that a fiber assembly having a uniform fiber diameter can be manufactured. Examples of the gas supply device 8 include a propeller fan, a sirocco fan, an air compressor, and a blower.

  In the manufacturing apparatus of FIG. 1, the gas in the spinning container 7 can be discharged using the exhaust device 9. When electrostatic spinning is performed, the vapor concentration of the solvent in the spinning vessel 7 becomes higher and higher, the evaporation of the solvent is suppressed, the fiber diameter becomes thin, and the fiber diameter tends to vary. In this case, the vapor concentration of the solvent reaches saturation, making it difficult to perform electrostatic spinning. However, by discharging the gas, the vapor concentration of the solvent in the spinning space 6 is kept constant, and the fiber diameters are uniform. A fiber assembly can be manufactured stably. In addition, although the exhaust apparatus 9 is not specifically limited, For example, it can be a fan installed in the exhaust port. As shown in FIG. 1, when gas is supplied to the spinning container 7 by the gas supply device 8, the same amount of gas as the supply amount can be discharged simply by providing an exhaust port. There is no need to provide it. In addition, when exhausting by the exhaust device 9 as shown in FIG. 1, the exhaust amount is preferably the same as the supply amount. This is because, if the supply amount and the exhaust amount are different, the pressure in the spinning space 6 changes, so that the evaporation rate of the solvent changes and the fiber diameter tends to vary.

Although not shown, in the manufacturing apparatus as shown in FIG. 1, the nozzles 2 ₁ , 2 ₂ , 2 ₃ , 2 ₄ , and the collector are used so that a fiber assembly having a uniform fiber amount in the width direction can be easily manufactured. 4 and / or the insulators 5 a and 5 b are preferably reciprocally swung in the width direction of the collector 4. As described above, the reciprocating swing can be performed using various motors.

Next, FIG. 2, which is a schematic top view of a fiber assembly manufacturing apparatus, for a method and a manufacturing apparatus for manufacturing a fiber assembly by supplying a spinning stock solution from the 16 spinning stock supply units arranged in a non-linear manner. Explained originally. Fiber aggregate production apparatus of FIG. 2, the discharge of the spinning dope nozzle group 2 ₁₁ is a spinning solution supplying _unit, the spinning solution feed device 1 that can be supplied to the ... 2 _44, the spinning solution supplied from the spinning solution supply unit 1 nozzle group ₂ 11 possible, ... _{2 44,} the nozzle groups _211, the voltage applying unit 3 can apply a voltage to the ... _{2 44,} nozzle groups ₂ 11, discharged from ... _{2 44,} the fibers drawn by the electric field The grounded collector 4 that can be collected, and the nozzles 2 ₁₁ , 2 ₂₁ , 2 ₃₁ , 2 ₄₁ , 2 ₁₄ , 2 ₂₄ , 2 ₃₄ , 2 ₄₄ located at the end in the width direction of the collector 4 Insulators 5c ₁₁ , 5c ₂₁ , 5c ₃₁ , 5c ₄₁ , 5c ₁₂ , 5c ₂₂ , 5c ₃₂ , 5c ₄₂ are respectively installed and located at the end in the traveling direction of the collector 4. Nozzle _{2 11-2} 14 _that, 2 _{41-2 44,} insulator _{5 m} 1 on the outside, 5 m ₂ is disposed respectively than spinning container containing the nozzle group _211, and ... _{2 44} and the collecting member 4 7. A gas supply device 8 that can supply a desired gas to the spinning vessel 7 and an exhaust device 9 that can exhaust the gas in the spinning vessel 7 are provided.

This figure in the fiber aggregate production apparatus 2, the spinning solution supplying section 16 places (nozzles) nozzle group 2 ₁₁ disposed in _non-linear, it constitutes a ... 2 _44, and the collecting member Except for the presence of the insulators 5m ₁ and 5m ₂ on the outer side of the two spinning dope supply parts located at the end in the traveling direction, the apparatus is exactly the same as the fiber assembly manufacturing apparatus of FIG.

More specifically, the first nozzle group 2 ₁₁ , 2 ₁₂ , 2 ₁₃ , 2 ₁₄ and the first nozzle group in the direction opposite to the traveling direction of the collector 4 are arranged in a straight line at an equal pitch. The second nozzle groups 2 ₂₁ , 2 ₂₂ , 2 ₂₃ , 2 ₂₄ in the second row arranged in a straight line at equal intervals and in the direction opposite to the traveling direction of the collector 4, The third nozzle groups 2 ₃₁ , 2 ₃₂ , 2 ₃₃ , 2 ₃₄ in the third row arranged in a straight line at a certain distance from the two nozzle groups, and the direction opposite to the traveling direction of the collector 4 Thus, a nozzle group is configured from the fourth nozzle groups 2 ₄₁ , 2 ₄₂ , 2 ₄₃ , 2 ₄₄ in the fourth row arranged in a straight line at an equal pitch with the third nozzle group at a certain interval. Yes. In this nozzle group, when the nozzles of the second nozzle group 2 ₂₁ , 2 ₂₂ , 2 ₂₃ , 2 ₂₄ are translated to the first nozzle group in parallel with the traveling direction of the collector 4, the second nozzle group 2 ₂₁ , _{2 22,} 2 _{23, 2 24} nozzles of the first nozzle group _{2 11,} 2 _12, 2 _13, between _{2 14} nozzles are (preferably middle) is arranged so as to be located, the third nozzle group 2 _{31, 2 32,} 2 _{33, 2 34} nozzles when is moved parallel to parallel to the traveling direction of the collecting member 4 to the second nozzle group, the third nozzle group _{2 31,} 2 _32, 2 _{33, 2 34} nozzles Are arranged between the nozzles of the second nozzle groups 2 ₂₁ , 2 ₂₂ , 2 ₂₃ , 2 ₂₄ (preferably in the middle), and the fourth nozzle groups 2 ₄₁ , 2 ₄₂ , 2 ₄₃ , 2 ₄₄ Collect the nozzles up to the third nozzle group. 4 when parallel moved parallel to the traveling direction of the fourth nozzle groups _{2 41,} 2 _42, 2 _{43, 2 44} nozzles of the third nozzle group _{2 31,} 2 _32, 2 _{33, 2 34} between the nozzle ( Preferably, they are arranged so as to be located in the middle). That is, they are arranged in a staggered manner in the top view as shown in FIG.

In the manufacturing apparatus in FIG. 2, the first left insulator 5c ₁₁ and the first right insulator 5c are respectively located outside 2 ₁₁ and 2 ₁₄ located at the end of the first nozzle group (the width direction of the collector). ₁₂ are arranged, and the second left insulator 5c ₂₁ and the second right insulator 5c ₂₂ are located outside 2 ₂₁ and 2 ₂₄ located at the endmost portion in the second nozzle group (width direction of the collector), respectively. Are arranged, and the third left insulator 5c ₃₁ and the third right insulator 5c ₃₂ are respectively located outside 2 ₃₁ and 2 ₃₄ located at the endmost part in the third nozzle group (width direction of the collector). The fourth left insulator 5c ₄₁ and the fourth right insulator 5c ₄₂ are arranged outside 2 ₄₁ and 2 ₄₄ located at the end of the fourth nozzle group (collector width direction), respectively. Has been. Furthermore, from the first nozzle group _{2 11-2 14} and downstream insulator 5 m ₁ is arranged in the advancing direction of the collecting body, the traveling direction of the collecting member than the fourth nozzle group _{2 41-2 44} An upstream insulator 5m ₂ is disposed on the opposite side.

The first left insulator 5c ₁₁ and the first right insulator 5c ₁₂ exist outside the first nozzle group (in the width direction of the collector) with respect to both the nozzles 2 ₁₁ and 2 ₁₄ , and the downstream insulator 5m. ₁ is present on the outside (the traveling direction of the collecting body) of the first nozzle group _{2 11-2 14,} the traveling direction of the collecting member the second nozzle group _{2 21-2 24} is present in the opposite direction, distance nozzle _{2 11} and the first left insulator _{5c 11,} the distance of the nozzles _{2 14} and the first right-insulator _{5c 12,} the distance between the first nozzle group _{2 11-2 14} between the downstream insulator 5 m _1, The distance between the first nozzle group 2 _{11 to} 2 ₁₄ and the second nozzle group 2 ₂₁ to 2 ₂₄ is the same as the nozzle pitch of the first nozzle group from one third of the nozzle pitch of the first nozzle group. Is preferred. By being present in this way, nozzle _{2 12} of the spinning dope discharged from the nozzle _{2 11,} the nozzle _{2 21,} the electric field received from the nozzles _{2 22,} first left insulator _{5c 11} and the downstream-side insulator 5 m ₁ This is because it is easy to suppress the spread of the fibers by making the action almost equal. Similarly, the spreading of the fiber is made substantially equal by the action of the electric field received from the nozzle 2 ₁₁ , nozzle 2 ₁₃ , nozzle 2 ₂₂ , nozzle 2 ₂₃ , and downstream insulator 5 m _{1 of} the spinning dope discharged from the nozzle 2 _12. It is because it is easy to suppress. The same applies to the nozzle 2 ₁₃ and the nozzle 2 ₁₄ .

For the same reason, the second left insulator 5c ₂₁ and the second right insulator 5c ₂₂ are not less than one third of the nozzle pitch of the second nozzle group than the two nozzles 2 ₂₁ and 2 _{24 of} the second nozzle group. Each of the third left insulator 5c ₃₁ and the third right insulator 5c ₃₂ is present from both nozzles 2 ₃₁ and 2 ₃₄ of the third nozzle group. Are also present on the outer side (in the width direction of the collector) from one third of the nozzle pitch of the third nozzle group to the same nozzle pitch as the third nozzle group, and the fourth left insulator 5c ₄₁ and the fourth right insulator 5c ₄₂ is one-third of the nozzle pitch of the fourth nozzle group from both nozzles 2 ₄₁ and 2 _{44 of} the fourth nozzle group to the outside as much as the nozzle pitch of the fourth nozzle group (in the width direction of the collector). And the upstream insulator 5m ₂ of the fourth nozzle group It is preferable that each of the nozzles is present on the outer side (the traveling direction of the collecting body) as much as one third to the nozzle pitch of the fourth nozzle group.

The insulators 5c _{11 to} 5c ₄₂ and 5m ₁ , 5m ₂ may all be made of the same insulator, or part or all may be made of different insulators.

When the fiber assembly is manufactured using the fiber assembly manufacturing apparatus as shown in FIG. 2, first, fibers derived from the spinning dope from the fourth nozzle groups 2 ₄₁ , 2 ₄₂ , 2 ₄₃ , 2 ₄₄ are the third nozzles. as well as reduce the influence of the electric field due to the spinning solution in the group by the upstream insulator 5 m _2, in particular the nozzle 2 ₄₁ in addition to the influence of the electric field, the fourth left insulator 5c the effect of the electric field due to the spinning dope of the nozzle 2 ₄₂ reduced by _41, the nozzles 2 ₄₄ in addition to the influence of the electric field, the influence of the electric field due to the spinning dope of the nozzle 2 ₄₃ were reduced by the fourth right insulator 5c _42, on the collecting body 4 while suppressing the spread of fiber Accumulate. Next, fibers derived from the spinning dope from the third nozzle group 2 ₃₁ , 2 ₃₂ , 2 ₃₃ , 2 ₃₄ , and fibers derived from the spinning dope from the second nozzle group 2 ₂₁ , 2 ₂₂ , 2 ₂₃ , 2 ₂₄ Similarly, the third left insulator 5c ₃₁ and the third right insulator 5c ₃₂ , the second left insulator 5c ₂₁ and the second right insulator 5c ₂₂ are successively collected while suppressing the spread of the fibers by the action of the third left insulator 5c ₃₁ and the third right insulator 5c ₃₂ 4 is accumulated. And finally, the fibers derived from the spinning stock solution from the first nozzle group 2 ₁₁ , 2 ₁₂ , 2 ₁₃ , 2 ₁₄ reduce the influence of the electric field by the spinning stock solution of the second nozzle group by the downstream insulator 5m ₁ . In addition to the influence of the electric field, in particular, the nozzle 2 ₁₁ reduces the influence of the electric field due to the spinning stock solution of the nozzle 2 ₁₂ by the first left insulator 5c ₁₁ , and the nozzle 2 ₁₄ also reduces the influence of the electric field. The influence of the electric field by the No. ₁₃ spinning stock solution is reduced by the first right insulator 5c _{12 and} is collected on the collector 4 while suppressing the spread of the fibers. In this way, the fibers formed from each nozzle group accumulate while suppressing spread, and accumulate while complementing each other in areas where the amount of fibers tends to decrease, so a fiber aggregate with a uniform amount of fibers in the width direction can be obtained. Can be manufactured.

In the manufacturing apparatus of FIG. 2, the first left insulator 5c ₁₁ , the first right insulator 5c _12, and the fourth left insulator are disposed outside the first nozzle group to the fourth nozzle group (in the width direction of the collector), respectively. 5c _41, is a mode in which the fourth right-insulator 5c ₄₂ disposed, it is not necessary to dispose an insulator in correspondence with the respective nozzle groups. For example, as shown in a schematic top view of the manufacturing apparatus in FIG. 3, only one left insulator 5 c ₁ and one right insulator 5 c ₂ may be arranged for the nozzle groups 2 ₁₁ to 2 ₄₄ .

Moreover, in the manufacturing apparatus of FIG. 2, although it is the aspect which has arrange | positioned the 1st nozzle group-the 4th nozzle group in parallel with the width direction of a collector, it does not need to be parallel. For example, as shown in a schematic top view of the manufacturing apparatus in FIG. 4, the nozzle groups may be arranged so as to form an angle (α) with the width direction of the collector, although they are parallel to each other. When arranged in this way, the nozzle pitch in the width direction of the collector can be narrowed, and it is easy to accumulate while complementing each other in a region where the amount of fibers tends to decrease, so a fiber aggregate with a uniform amount of fibers in the width direction Is easy to manufacture. The manufacturing apparatus of FIG. 4 can be exactly the same as the manufacturing apparatus of FIG. 2 except that the nozzle groups are arranged in this way. Incidentally, when the nozzle as shown in FIG. 4 are arranged, the insulator in the direction of travel of the collecting body may exist outside the nozzle 2 ₄₄ and the nozzle 2 _11, but the first nozzle group 2 ₁₁ - the action of the electric field with respect to 2 ₁₄ and the fourth nozzle group _{2 41-2 44} to make it easier to suppress the spread of the fibers as comparable, the first nozzle group _{2 11-2 14} and a fourth nozzle group _{2 41-2 44} parallel, in particular the downstream insulator 5 m ₁ are present spaced apart by the nozzle pitch from one third of the first nozzle group with a nozzle pitch of the first nozzle group, the upstream-side insulator 5 m ₂ fourth nozzle It is preferable that the nozzle pitch of the fourth nozzle group is separated from one third of the nozzle pitch of the group. In addition, there is an insulator corresponding to each nozzle group so that the effect of the electric field applied to the fibers at both ends of each nozzle group (in the width direction of the collecting body) can be made comparable. It is preferable that the nozzle pitch is separated from one third of the nozzle pitch of each nozzle group by the nozzle pitch of each nozzle group.

  In the manufacturing apparatus of FIG. 2, when the nozzles of the third nozzle group are translated to the first nozzle group in parallel with the traveling direction of the collector, the nozzles of the third nozzle group and the nozzles of the first nozzle group overlap. When the nozzles of the fourth nozzle group are translated to the second nozzle group in parallel with the traveling direction of the collector, the nozzles of the fourth nozzle group and the nozzles of the second nozzle group overlap each other. However, the present invention is not limited to such an embodiment. For example, as shown in a schematic top view of the manufacturing apparatus in FIG. 5, the nozzle groups are parallel, but the nozzles do not overlap regardless of which nozzle group is translated in parallel with the traveling direction of the collector. The aspect arrange | positioned in this way may be sufficient. Even when arranged in this way, the nozzle pitch in the width direction of the collector can be narrowed, and it is easy to accumulate while complementing each other in a region where the amount of fibers tends to be small. There is an effect that it is easy to manufacture the body. The manufacturing apparatus of FIG. 5 can be exactly the same as the manufacturing apparatus of FIG. 2 except that the nozzle groups are arranged in this way.

  As can be seen from the above examples, the “three or more spinning stock supply units arranged in a non-linear manner” in the present invention means that the figure formed by connecting the spinning stock supply units is not a straight line. In the manufacturing apparatus shown in FIGS. 2 to 5, the nozzles that are the spinning dope supply unit are in a state of being provided with a plurality of nozzle groups that form a linear group, but are not necessarily a linear nozzle group. It is not necessary and may be in a randomly arranged state.

Furthermore, the cutting direction schematic diagram of another manufacturing apparatus is shown in FIG. In FIG. 6, the first nozzle group 2a, the second nozzle group 2b, the third nozzle group 2c, and the fourth nozzle group 2d are arranged with sufficient intervals so that there is no influence of the electric field by the adjacent nozzle groups. That the collector 4 is a drum, outside the nozzles located at both ends of the first nozzle group 2a, the second nozzle group 2b, the third nozzle group 2c, and the fourth nozzle group 2d (the collector In the width direction), the first right insulator 5c _12, the first left insulator (not shown), the second right insulator 5c _22, the second left insulator (not shown), and the third right insulator 5c, respectively. ₁₃ and the third left insulator (not shown), the fourth right insulator 5c ₁₄ and the fourth left insulator (not shown), the gas supply unit from the gas supply device 8, and the spinning spaces 6a to 6a. The presence of the porous material 10a with respect to 6d and the exhaust part to the exhaust device 9 2 is exactly the same as the manufacturing apparatus of FIG. 2 except that the porous material 10b exists between the spinning spaces 6a to 6d. In this manufacturing apparatus, since the nozzle groups 2a to 2d are arranged at a sufficient interval from each other, there is no insulator in the traveling direction of the collector 4. Further, since gas can be supplied to the spinning spaces 6a to 6d through the porous material 10a (for example, a metal or resin punching plate, cloth, nonwoven fabric, etc.), the gas supply amount to the spinning spaces 6a to 6d The effect is that it is easy to keep constant. Furthermore, by providing the porous material 10b (for example, a metal or resin punching plate, cloth, non-woven fabric, etc.), no gas is exhausted locally, and the gas is evenly distributed from above to below the spinning vessel 7. This has the effect that the environment in the spinning spaces 6a to 6d can be made constant.

  Examples of the present invention will be described below, but the present invention is not limited to the following examples.

(Example)
(Preparation of spinning dope)
A spinning stock solution (viscosity: 580 mP · s) in which polyacrylonitrile having a weight average molecular weight of 300,000 was dissolved in N, N-dimethylformamide to a concentration of 12 mass% was prepared.

(Preparation of manufacturing equipment)
A manufacturing apparatus as shown in FIG. 6 was prepared. In other words, a polytetrafluoroethylene tube is connected to the syringe (spinning solution supply device 1), and a stainless needle nozzle with an inner diameter of 0.4 mm is attached to the tip of the tube which is further branched into eight tubes. After that, the first nozzle group 2a was produced by arranging in a straight line at a pitch of 3 cm. Similarly, a second nozzle group 2b to a fourth nozzle group 2d in which stainless needle nozzles having an inner diameter of 0.4 mm were arranged in a straight line at a pitch of 3 cm were produced.

  Next, a high voltage power source (voltage applying device 3) is connected to the nozzle groups 2a to 2d, the nozzle groups are directed toward the center of the drum collector 4, and the tip of each nozzle is located 10 cm away from the drum collector 4 It installed so that it might become. The first nozzle group 2a and the second nozzle group 2b, the second nozzle group 2b and the third nozzle group 2c, and the third nozzle group 2c and the fourth nozzle group 2d have a distance between the nozzle groups of 20 cm. The effect of the electric field between the nozzle groups was made sufficiently small. Further, when the first nozzle group 2a is translated up to the second nozzle group 2b in the direction parallel to the rotation direction of the drum collector, the first nozzle group 2a is only 0.75 cm away from the individual nozzles of the second nozzle group 2b. When the second nozzle group 2b is translated in a direction parallel to the rotation direction of the drum collector up to the third nozzle group 2c, the second nozzle group 2b is moved to the individual position of the third nozzle group 2c. Are arranged at a position shifted by 0.75 cm (position shifted in the same direction as the displacement direction of the second nozzle group 2b from the first nozzle group 2a), and the third nozzle group 2c is disposed at the fourth nozzle group. The position where the third nozzle group 2c is displaced from the individual nozzles of the fourth nozzle group 2d by 0.75 cm (the second nozzle of the third nozzle group 2c) when translated in the direction parallel to the rotation direction of the drum collector up to 2d. How to deviate from the nozzle group 2b And it was arranged in a position deviated) in the same direction. Furthermore, the drum collector 4 was a grounded stainless steel plate with a conductive silicon processed surface, and was grounded.

Subsequently, the collectors of the first left insulator 5c ₁₁ , the first right insulator 5c ₁₂ , and the second nozzle group 2b are respectively disposed outside the nozzles at both ends in the width direction of the collector of the first nozzle group 2a by 2 cm. Of the second left insulator 5c ₂₁ , the second right insulator 5c ₂₂ , and the nozzles of the third nozzle group 2c in the width direction on the outside of the nozzles at both ends in the width direction of 2 cm. The third left insulator 5c ₃₁ , the third right insulator 5c ₃₂ , and the fourth nozzle group 2d on the outer side separated from each other by 2 cm away from the nozzles at both ends in the width direction, respectively. The body 5c ₄₁ and the fourth right insulator 5c ₄₂ were disposed. Each of the first left insulator 5c ₁₁ to the fourth right insulator 5c ₄₂ is a substantially rectangular polyethylene terephthalate film (vertical (nozzle direction): 11 cm, width: 6 cm, thickness: 0.5 μm). Then, an acrylic plate (vertically (nozzle direction): 11 cm, width: 6 cm, thickness: 2 mm) was used, and the polyethylene terephthalate film was placed on each nozzle group side.

Further, the first nozzle group 2a~ fourth nozzle groups 2d and the first left insulator 5c 11 _~ fourth right insulator 5c ₄₂ is swung, so it is possible to improve the uniformity of the fiber aggregate, the rack -An electric actuator (LU2B20SA-4, manufactured by Oriental Motor Co., Ltd.) that has a pinion mechanism and can be continuously linearly moved is connected.

Then, the nozzle group 2 a to 2 d, the first left-insulator _{5c 11} ~ fourth right insulator _{5c 42,} and the drum collecting member 4 the stainless steel rectangular spinning vessel 7 (width: 600 mm, height: 600 mm, Depth: 440 mm) at the center. In addition, the rectangular parallelepiped spinning container 7 used was provided with punching plates (porous materials 10a, 10b) both above and below in the height direction.

  A blower (PAU-1400HDR, Apiste Co., Ltd., gas supply device 8) having a temperature / humidity adjusting function is connected to the upper wall surface of the rectangular parallelepiped spinning container 7, and an exhaust fan ( An exhaust device 9) was connected.

(Manufacture of fiber assemblies)
The spinning solution is put into the syringe 1, the spinning solution is supplied to each nozzle using a microfeeder, the spinning solution is discharged from each nozzle (discharge amount: 2.1 g / hour), and the drum collector 4 is While rotating at a constant speed (surface speed: 6.3 cm / min), a voltage of +18 kV is applied from the high voltage power source 3 to each nozzle, and an electric field is applied to the extruded spinning dope to produce fibers, and the drum trapping is performed. A fiber assembly was produced by accumulating on the stainless steel thin plate of the assembly 4.

When manufacturing the fiber assembly, the air supply device 8 supplies humidity-controlled air at a temperature of 25 ° C. and a relative humidity of 30% at 1.5 m ³ / min. 9 exhausted. Further, when manufacturing a fiber aggregate, constant speed (moving the nozzle groups 2a~2d and the first left insulator 5c 11 _~ fourth right insulator 5c _42, by an electric Akucheeta in the width direction of the drum collector body 4 The reciprocating rocking (rocking width: 4.5 cm) was performed at a speed of 2.1 cm / sec.

(Evaluation of fiber assembly)
The fiber assembly manufactured as described above is cut into a rectangle of 5 cm in the traveling direction of the collecting body 4 and 1 cm in the width direction of the collecting body 4, and samples 1 to 31 (with respect to the traveling direction of the collecting body 4). After collecting the sample 1) at the left end, the mass (= fiber mass = weight per unit area) of each sample was measured. The result was as shown in FIG. In the production of the above, and back and forth swinging the nozzle group 2a~2d and the first left insulator _{5c 11} ~ fourth right insulator _{5c 42} with a width of 4.5 cm, the sample 1-5 and sample 27-31 Is a region formed by reciprocating rocking, and therefore the fiber mass fluctuates between 4.2 and 4.3 when the fiber amount in these regions is excluded, and the fiber assembly has a uniform fiber amount in the width direction. It was a body.

(Comparative example)
A fiber assembly was manufactured in the same manner as in the example except that the first left insulator 5c ₁₁ to the fourth right insulator 5c ₄₂ were not arranged. This fiber assembly was evaluated in the same manner as in the examples. The result was as shown in FIG. As with the embodiment, in consideration of the exclusion of the fiber amount in the region formed by the reciprocating rocking nozzle groups 2a~2d and the first left insulator 5c 11 _~ fourth right insulator 5c _42, fiber mass The fiber aggregate varied in the range of 3.3 to 4.2, and the amount of fibers in the width direction was not uniform.

Width direction cut schematic diagram of the fiber assembly manufacturing apparatus of the present invention Schematic top view of another fiber assembly manufacturing apparatus of the present invention Schematic top view of yet another fiber assembly manufacturing apparatus of the present invention Schematic top view of yet another fiber assembly manufacturing apparatus of the present invention Schematic top view of yet another fiber assembly manufacturing apparatus of the present invention Travel direction cutting schematic diagram of still another fiber assembly manufacturing apparatus of the present invention Distribution of fiber amount (weight per unit area) in the width direction of the fiber assembly of the example Distribution of fiber amount (weight per unit area) in the width direction of the fiber assembly of the comparative example

Explanation of symbols

1 spinning solution supplying device ₂₁ to _{24, 2 11-2 44} nozzles 2a~2d nozzle group 3 voltage applying device 4 collecting member 5a, 5b insulator _{5c 1, 5c 2, 5c 11} ~5c 42 ( collecting member widthwise Insulator 5m ₁ , 5m ₂ Insulator 6, 6a, 6b, 6c, 6d Spinning space 7 Spinning container 8 Gas supply device 9 Exhaust device 10a, 10b Porous material

Claims (4)

A supply step of supplying a spinning stock solution from two or more spinning stock supply units arranged in a straight line, and an electric field applied to the supplied spinning stock solution to stretch and fiberize the fibers directly on the collector. In a fiber assembly manufacturing method comprising a fiber accumulation process for forming a fiber assembly, a state in which an insulator is present on the outer side of both spinning stock solution supply portions located at the end portions in the width direction of the collection body A method for producing a fiber assembly, characterized in that a fiber accumulation step is carried out. A supply step of supplying a spinning solution from three or more spinning solution supply units arranged in a non-linear manner, and an electric field applied to the supplied spinning solution to stretch and fiberize the fibers directly on the collector. A fiber assembly step for forming a fiber assembly, and a fiber assembly manufacturing method comprising: a spinning assembly solution supply portion located at the most end in the width direction of the collection body; and a traveling direction of the collection body The fiber assembly manufacturing method is characterized in that the fiber accumulation step is performed in a state where an insulator is present outside the both spinning stock solution supply portions located at the most ends in FIG. A supply means comprising two or more spinning stock solution supply sections arranged in a straight line, capable of supplying a spinning stock solution, an applying means capable of drawing and fiberizing by applying an electric field to the spinning stock solution supplied by the supply means, A fiber assembly comprising: a collector that can directly accumulate the fibers; and an insulator that is present outside the two spinning dope supply units located at the endmost portions in the width direction of the collector. Body manufacturing equipment. A supply means comprising three or more spinning stock solution supply sections arranged in a non-linear manner and capable of supplying a spinning stock solution, and an application means capable of drawing and fiberizing the spinning stock solution supplied by the supplying means by applying an electric field. A collector that can directly accumulate the fibers, an insulator that is present at the outermost side of both spinning stock supply parts located at the end in the width direction of the collector, and an end located at the end in the traveling direction of the collector And an insulator that is present on the outer side of the two spinning dope supply units.

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