JP2009167559A - Device for producing nanofiber and apparatus for producing nonwoven fabric - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device for producing nanofiber in high density in a stable state for a long period. <P>SOLUTION: The device 200 for producing the nanofiber equipped with jetting means 201 having a jetting nozzle 206 for jetting a raw material liquid 300 becoming a raw material for the nanofiber 301 into a space, charging means 202 for charging the raw material liquid 300 by imparting charge, and gas flow-generating means 203 for generating gas flow for changing the flying direction of the jetted raw material liquid 300 or the produced nanofiber 301 has gas flow-controlling means 204 for controlling the gas flow so that the gas flow generated by the gas flow-generating means 203 may not strike the jetting nozzle 206. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a nanofiber manufacturing apparatus that manufactures nanofibers using an electrospinning method (electrostatic explosion), and a non-woven fabric manufacturing apparatus that manufactures nonwoven fabrics by depositing nanofibers manufactured by an electrospinning method. Further, the present invention relates to a nanofiber manufacturing apparatus and a non-woven fabric manufacturing apparatus that can be used for a long-term operation with an extended maintenance interval.

  An electrospinning (charge-induced spinning) method is known as a method for producing a filamentous (fibrous) material (nanofiber) made of a polymer material or the like and having a submicron-scale diameter.

  This electrospinning method is a method in which a raw material liquid in which a polymer substance or the like is dispersed or dissolved in a solvent is ejected (discharged) into the space, and a charge is imparted to the raw material liquid to charge it. In this method, nanofibers are obtained by electrostatic explosion of a liquid.

  More specifically, the volume of the raw material liquid decreases as the solvent evaporates from the particles of the raw material liquid in flight, but the charge imparted to the raw material liquid is maintained. The charge density of the grains increases. Since the solvent continuously evaporates, the charge density of the raw material liquid particles is further increased, and the polymer is rebounded when the repulsive Coulomb force generated in the raw material liquid grains exceeds the surface tension of the raw material liquid. A phenomenon (electrostatic explosion) in which the solution is stretched linearly occurs. This electrostatic explosion is generated in a spiral manner one after another in the space, thereby producing a nanofiber made of a polymer having a submicron diameter (for example, see Patent Document 1).

When nanofibers manufactured by the electrospinning method are used as raw materials for yarns and nonwoven fabrics, it is necessary to collect a large amount of nanofibers at high density. For this purpose, for example, Patent Document 2 describes an invention in which a large number of nanofibers are manufactured at a high density by arranging a large number of nozzles for injecting a raw material liquid toward an electrode for collecting the nanofibers.
Japanese Patent Laying-Open No. 2005-330624 JP 2002-201559 A

  However, when the raw material liquid is sprayed with a large number of nozzles directed toward the collecting electrode, the raw material liquid is charged and spreads while repelling each other, and the density in the space of the manufactured nanofiber is reduced. It is difficult to maintain it in a high state. In addition, it is difficult to make the density of the manufactured nanofibers uniform in space.

  Therefore, the inventors of the present application provide a cylindrical container having a large number of injection ports on the peripheral wall as an injection means for injecting the raw material liquid into the space, with the axis of the container facing the collection electrode, and the axis being the rotation axis. As a result, a structure has been developed in which the raw material liquid is injected by a centrifugal force substantially perpendicular to the direction toward the collecting electrode by rotating the container. Further, the invention for manufacturing nanofibers at high density by forcibly changing the flight direction of the raw material liquid injected substantially parallel to the collecting electrode with a separately generated gas flow and directing the raw material liquid toward the collecting electrode Is filed separately.

  The inventors of the present application have found a new problem at the stage of conducting research on the structure and method. That is, when the nanofiber is manufactured for a long time using the jetting means, the manufacturing efficiency of the nanofiber gradually decreases, and it becomes difficult to maintain the density of the manufactured nanofiber in a high state. .

  In view of the above problems, the present inventors have completed the present invention as a result of intensive experiments and research. That is, the present invention aims to provide a nanofiber manufacturing apparatus that can stably manufacture nanofibers at high density even during long-time operation, and a non-woven fabric manufacturing apparatus that manufactures non-woven fabrics using the nanofiber manufacturing technology. And

  In order to achieve the above object, a nanofiber manufacturing apparatus according to the present invention includes an injection unit having an injection port for injecting a raw material liquid that is a raw material of nanofibers into a space, and charging by applying an electric charge to the raw material liquid. A nanofiber manufacturing apparatus comprising: a charging means for generating a gas flow; and a gas flow generating means for generating a gas flow for changing a flight direction of the jetted raw material liquid or the manufactured nanofiber. And a gas flow control means for controlling the gas flow so that the gas flow does not hit the injection port.

  Thereby, evaporation of the raw material liquid existing in the vicinity of the injection port is hardly promoted by the gas flow, and it is avoided as much as possible that the injection port becomes constricted or blocked by the solute forming the nanofiber. It becomes possible. Accordingly, the raw material liquid can be jetted in a stable state over a long period of time, and the productivity of the nanofiber can be improved.

  Furthermore, it is preferable to provide a heating means for heating the gas constituting the gas flow generated by the gas flow generating means.

  Thereby, since the evaporation of the raw material liquid is promoted except near the injection port, it becomes possible to efficiently manufacture the nanofiber while maintaining the long-term stable injection.

  In addition, the non-woven fabric manufacturing apparatus includes an injection unit including an injection port for injecting a raw material liquid that is a raw material of the nanofiber into the space, a charging unit that applies an electric charge to the raw material liquid and charges, and the injected raw material liquid Alternatively, gas flow generating means for generating a gas flow for changing the flight direction of the manufactured nanofiber, and gas flow control for controlling the gas flow so that the gas flow generated by the gas flow generating means does not hit the injection port Means, a collecting means for collecting the nanofibers manufactured in the space, and a transporting means for transporting the collected nanofibers. A nonwoven fabric can be produced.

  In order to achieve the above object, the nanofiber manufacturing method according to the present invention includes an injection step of injecting a raw material liquid by an injection unit including an injection port for injecting a raw material liquid as a raw material of the nanofiber into the space; A charging step for charging the raw material liquid by charging it, a gas flow generating step for generating a gas flow for changing the flight direction of the injected raw material liquid or the manufactured nanofiber, and injection from the injection port And a gas flow control step of controlling the gas flow so that the raw material liquid hits the gas flow generated by the gas flow generation means after flying a predetermined distance from the injection port.

  Thereby, it is possible to prevent the gas flow from hitting the raw material liquid immediately after injection, and to avoid clogging at the injection port as much as possible.

  Even when the flight direction of the injected raw material liquid is changed by the gas flow, it is possible to maintain high efficiency over a long period of time and to manufacture nanofibers at a high density.

  Next, an embodiment of a nonwoven fabric manufacturing apparatus including a nanofiber manufacturing apparatus according to the present invention will be described with reference to the drawings.

(Embodiment 1)
FIG. 1 is a perspective view schematically showing a non-woven fabric manufacturing apparatus according to the present invention.

  As shown in these drawings, the nonwoven fabric manufacturing apparatus 100 includes a nanofiber manufacturing apparatus 200, a collection unit 101, and a transport unit 102. Further, the nonwoven fabric manufacturing apparatus 100 includes a partition wall 103, a gas supply source 104, and an exhaust device 105. In addition, the figure has shown the nonwoven fabric manufacturing apparatus 100, omitting a part of partition 103, in order to show the inside of the nonwoven fabric manufacturing apparatus 100. FIG.

  The collecting means 101 is a member on which nanofibers manufactured in space are to be deposited, and is a thin and flexible long sheet made of a material that can be easily separated from the deposited nanofibers. The collecting means 101 is supplied from the supply roll 111 in a state of being wound in a roll shape.

  The conveyance means 102 is configured to convey the nanofibers deposited on the collection means 101 by slowly moving the long collection means 101 while winding it. The conveyance means 102 can wind up the nonwoven fabric on which nanofibers are deposited together with the collection means 101.

  The partition wall 103 is a member having no air permeability, and is a member that forms a chamber that covers substantially the entire nonwoven fabric manufacturing apparatus 100. As the partition wall 103, for example, a resin panel can be assembled into a box shape, or a flexible sheet having almost no air permeability can be listed on a metal frame. Note that a floor on which the nonwoven fabric manufacturing apparatus 100 is placed may be used as the partition wall 103.

  Note that the chamber formed by being surrounded by the partition wall 103 can maintain the outdoor and indoors in different atmospheres. Therefore, the chamber can be maintained in a lower oxygen state than the external space by introducing the safety gas from the gas supply source 104.

  The gas supply source 104 is a device that supplies a safety gas to the chamber. Examples of the safety gas supplied from the gas supply source 104 include low oxygen concentration gas obtained by removing oxygen from air to some extent by a resin membrane (hollow fiber membrane), and superheated steam. If the chamber is filled with a safety gas and is in a low oxygen state, explosion can be avoided even if the solvent evaporated from the raw material liquid for producing nanofibers is flammable. Here, the low oxygen concentration means a concentration lower than the oxygen concentration of air. More specifically, it is below the critical oxygen concentration at which the evaporated solvent does not explode. This description does not exclude the use of high-purity gas containing almost no oxygen, but carbon dioxide supplied from high-purity nitrogen or dry ice sealed in a cylinder in a liquid or gas state. Etc. are also available.

  The exhaust device 105 is a device that can exhaust the atmosphere (low oxygen concentration gas or evaporated solvent) existing in the chamber. Further, the exhaust device 105 includes a recovery device that can recover a solvent or the like contained in the exhausted atmosphere.

  The inside of the chamber can be maintained at a positive pressure by the balance between the gas supply amount of the gas supply source 104 and the gas exhaust amount of the exhaust device 105. The positive pressure means a state in which the pressure in the inner space is higher than the pressure in the outer space of the partition wall.

FIG. 2 is a side view schematically showing the nonwoven fabric manufacturing apparatus.
The nanofiber production apparatus 200 is an apparatus for producing a nanofiber 301 by injecting a charged raw material liquid 300 into a space and generating an electrostatic explosion in the space. The injection means 201, the charging means 202, A gas flow generation unit 203, a gas flow control unit 204 (not shown), a heating unit 205 (not shown), a collection electrode 207, and a collection power source 208 are provided. In addition, although the raw material liquid for manufacturing a nanofiber is described as the raw material liquid 300, and the manufactured nanofiber is described as the nanofiber 301, the boundary between the raw material liquid 300 and the nanofiber 301 is ambiguous in manufacturing. It is not something that can be clearly distinguished.

  The collection electrode 207 is a metal electrode to which a potential is applied by the collection power source 208 so that a predetermined potential difference from the ejection unit 201 is generated. The collection electrode 207 is disposed on the opposite side of the ejection unit 201 with respect to the sheet-like collection unit 101 and opposed to the ejection unit 201. In addition, the collection electrode 207 has a function of electrically attracting the charged nanofibers 301 generated and ejected from the ejection unit 201 and depositing the nanofibers 301 on the collection unit 101. In the case of the present embodiment, the collection electrode 207 has a cylindrical shape with a diameter of 50 cm to several meters, and rotates in synchronization with the movement of the collection means 101 arranged along the outer peripheral surface of the collection electrode 207. It is possible to do.

  The collection power source 208 is a power source for setting the collection electrode 207 to a predetermined potential. The potential of the collection electrode 207 is desirably opposite to the polarity of the charging of the nanofiber 301.

FIG. 3 is a cross-sectional view schematically showing an injection unit, a gas flow control unit, and the like.
FIG. 4 is a perspective view schematically showing the appearance of the injection means, the gas flow control means, and the like.

  As shown in the figure, the injection means 201 is a device that injects the raw material liquid 300 into the space, and includes a rotating container 211, a rotating shaft body 212, and a motor 213.

  The rotary container 211 is a container that can temporarily store the raw material liquid 300 and can inject the stored raw material liquid 300 into the space, has a cylindrical shape with one end closed, and has an injection port 206 on the peripheral wall. It has many. The other end portion of the rotating container 211 includes a flange portion 214 that protrudes inward. The flange portion 214 functions as a bank for storing a predetermined amount of the raw material liquid 300 inside the rotary container 211. Further, the rotating container 211 is formed of a conductor in order to give a charge to the stored raw material liquid 300.

  The rotating shaft body 212 is a shaft body for transmitting a driving force for rotating the rotating container 211 and injecting the raw material liquid 300 by centrifugal force, and is inserted into the rotating container 211 from the other end of the rotating container 211. This is a rod-like body in which the closed portion and one end portion of the rotating container 211 are joined. The other end is joined to the rotating shaft of the motor 213.

  The charging unit 202 is a device that charges the raw material liquid 300 by charging it, and includes an induction electrode 221, an induction power source 222, and a grounding unit 223.

  The induction electrode 221 is a member that induces electric charges to the rotating container 211 that is arranged in the vicinity and grounded when the induction electrode 221 has a high voltage with respect to the ground, and is arranged so as to surround the distal end portion of the rotating container 211. It is an annular member.

  The induction power supply 222 is a power supply that can apply a high voltage to the induction electrode 221. The induction power supply 222 may be direct current or alternating current.

  The grounding means 223 is a member that is electrically connected to the rotating container 211 and can maintain the rotating container 211 at the ground potential, and one end of the grounding means 223 has an electrical connection state even when the rotating container 211 is in a rotating state. It functions as a brush so that it can be maintained, and the other end is connected to the ground.

  If an induction method is employed for the charging unit 202 as in the present embodiment, it is possible to apply a charge to the raw material liquid 300 while maintaining the rotating container 211 at the ground potential. If the rotating container 211 is in the ground potential state, it is not necessary to electrically insulate members such as the rotating shaft 212 and the motor 213 connected to the rotating container 211 from the rotating container 211, and the simple structure as the ejection unit 201 is achieved. Can be adopted, which is preferable.

  As a charging means, a power source may be directly connected to the rotating container 211, and the rotating container 211 may be maintained at a high voltage to apply a charge to the raw material liquid 300. In addition, the rotary container 211 is formed of an insulator, and an electrode that directly contacts the raw material liquid 300 stored in the rotary container 211 is disposed inside the rotary container 211, and an electric charge is applied to the raw material liquid 300 using the electrode. It may be a thing.

  This is a device for generating a gas flow for changing the flight direction of the raw material liquid 300 injected from the gas flow generation means 203 and the rotating container 211. In the case of the present embodiment, a blower including an axial flow fan that forcibly blows the surrounding atmosphere (safety gas) is employed as the gas flow generation means 203. The gas flow generation means 203 is provided on the back of the motor 213 and generates a gas flow from the motor 213 toward the tip of the rotating container 211. The gas flow generation means 203 can generate wind power that can be changed in the axial direction until the raw material liquid 300 injected in the radial direction from the rotating container 211 reaches the induction electrode 221 by centrifugal force. ing.

In FIG. 3, the gas flow is indicated by arrows.
Further, the gas flow generation means 203 may be constituted by another blower such as a sirocco fan, or a safe gas flow from the gas supply source 104 may be used as the gas flow. In addition, the gas constituting the gas flow may be air, or an inert gas such as nitrogen may be used.

  The gas flow control means 204 has a function of controlling the gas flow so that the gas flow generated by the gas flow generation means does not hit the injection port. In this embodiment, as the gas flow control means 204, An air passage body that guides the gas flow so as to flow in a predetermined region is employed. The gas flow control unit 204 includes an annular introduction port 241 into which the gas flow generated by the gas flow generation unit 203 is introduced, and the gas flow does not directly hit the injection port 206 and from the rotary container 211. An outlet 242 for deriving a gas flow is provided in a region where the raw material liquid 300 injected in the radial direction can be converted in the axial direction. Further, an air passage 243 connecting the inlet 241 and the outlet 242 is provided. The inlet 241, the outlet 242 and the air passage 243 are formed by a resin air passage body.

  The heating unit 205 is a heating source that heats the gas (safe gas) that constitutes the gas flow generated by the gas flow generation unit 203. In the case of the present embodiment, the heating means 205 is an annular heater disposed in the vicinity of the inlet 241 in the air passage 243 and can heat the gas (safety gas) passing through the heating means 205. It has become.

  By heating the gas flow by the heating means 205, the raw material liquid 300 injected into the space is promoted to evaporate, and nanofibers can be manufactured efficiently.

Next, an outline of a manufacturing method of the nanofiber 301 will be described.
First, a safety gas is supplied into the chamber by the gas supply source 104. On the other hand, the exhaust device 105 sucks the atmosphere in the chamber. As described above, since the atmosphere in the chamber is sucked while the safety gas is supplied into the chamber, the chamber is in an equilibrium state at a predetermined pressure and a predetermined oxygen concentration, and is in an explosion-proof state.

  Next, the raw material liquid 300 is supplied to the rotating container 211. The raw material liquid 300 is separately stored in a tank (not shown), passes through the raw material liquid supply path 106 (see FIG. 3), and is supplied into the rotary container 211 from the other end of the rotary container 211. Next, while supplying electric charge to the raw material liquid 300 stored in the rotary container 211 by the induction power supply 222, the rotary container 211 is rotated by the motor 213, and the charged raw material liquid 300 is injected from the injection port 206 by centrifugal force. .

  Here, as the raw material liquid 300 for manufacturing the nanofiber 301, what melt | dissolves and mixes an organic solvent in an epoxy resin, a polyimide resin, a LCP (liquid crystal polymer) resin, etc. can be illustrated.

  Further, examples of other solute materials include polypropylene, polyethylene, polystyrene, polyethylene oxide, polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, poly-m-phenylene terephthalate, poly-p-phenylene isophthalate, polyvinylidene fluoride, Polyvinylidene fluoride-hexafluoropropylene copolymer, polyvinyl chloride, polyvinylidene chloride-acrylate copolymer, polyacrylonitrile, polyacrylonitrile-methacrylate copolymer, polycarbonate, polyarylate, polyester carbonate, nylon, aramid, polycaprolactone, Examples thereof include polylactic acid, polyglycolic acid, collagen, polyhydroxybutyric acid, polyvinyl acetate, and polypeptide. Moreover, the above-mentioned one type may be used, or a plurality of types may be mixed and used at a predetermined ratio.

Moreover, you may add an inorganic solid material to a raw material liquid. It is possible to change the properties of nanofibers obtained from inorganic solid materials. Examples of inorganic solid materials include metals, oxides, carbides, nitrides, borides, silicides, fluorides, sulfides, and the like. Furthermore, specific examples of the inorganic solid material include Al ₂ O ₃ , SiO ₂ , TiO ₂ , Li ₂ O, Na ₂ O, MgO, CaO, SrO, BaO, B ₂ O ₃ , P ₂ O ₅ , SnO _{2. , ZrO 2, K 2 O,} Cs 2 O, ZnO, Sb 2 O 3, As 2 O 3, CeO 2, V 2 O 5, Cr 2 O 3, MnO, Fe 2 O 3, CoO, NiO, Y 2 O ₃ , Lu ₂ O ₃ , Yb ₂ O ₃ , HfO ₂ , Nb ₂ O _{5 and the} like can be listed. Moreover, the above-mentioned one type may be used, or a plurality of types may be mixed and used at a predetermined ratio.

  As the solvent that can be used for the raw material liquid, a solvent in which the raw material liquid evaporates (volatilizes) while flying in space is preferable. Specific examples include acetonitrile, toluene, dichloromethane, alcohols such as methanol and ethanol, and acetone. Furthermore, methanol, ethanol, 1-propanol, 2-propanol, hexafluoroisopropanol, tetraethylene glycol, triethylene glycol, dibenzyl alcohol, 1,3-dioxolane, 1,4-dioxane, methyl ethyl ketone, methyl isobutyl ketone, methyl -N-hexyl ketone, methyl-n-propyl ketone, diisopropyl ketone, diisobutyl ketone, acetone, hexafluoroacetone, phenol, formic acid, methyl formate, ethyl formate, propyl formate, methyl benzoate, ethyl benzoate, propyl benzoate, Methyl acetate, ethyl acetate, propyl acetate, dimethyl phthalate, diethyl phthalate, dipropyl phthalate, methyl chloride, ethyl chloride, methylene chloride, chloroform, o-chlorotoluene, p Chlorotoluene, chloroform, carbon tetrachloride, 1,1-dichloroethane, 1,2-dichloroethane, trichloroethane, dichloropropane, dibromoethane, dibromopropane, methyl bromide, ethyl bromide, propyl bromide, acetic acid, benzene, toluene, Examples include hexane, cyclohexane, cyclohexanone, cyclopentane, o-xylene, p-xylene, m-xylene, acetonitrile, tetrahydrofuran, N, N-dimethylformamide, pyridine, water and the like. Moreover, the above-mentioned one type may be used, or a plurality of types may be mixed and used at a predetermined ratio.

  The proportion of the solvent in the raw material liquid is preferably about 60% to 98%, and is determined by the fiber material to be used, the type of solvent, the diameter of the fiber to be produced, and the like.

  The direction of flight of the injected raw material liquid 300 is changed by the gas flow. Thereby, the injection ports 206 can be arranged perpendicularly or substantially perpendicular to the deposition surface of the nanofiber 301, and a large amount of the raw material liquid 300 can be injected into a certain space. Further, since the gas flow is heated, the evaporation of the solvent is promoted, the electrostatic explosion is promoted, and the nanofiber 301 can be manufactured efficiently.

  Here, the gas flow that changes the flight direction of the raw material liquid 300 and promotes the evaporation of the solvent is controlled by the gas flow control means 204 so as not to reach the injection port 206 and the vicinity thereof. Accordingly, since the evaporation of the solvent contained in the raw material liquid 300 is hardly promoted near the injection port 206, the injection port 206 is not narrowed or blocked by the solute. Therefore, even if it continues injecting the raw material liquid 300 from the rotation container 211 for a long period, it can suppress as much as possible that the injection quantity falls. That is, it is possible to maintain the concentration of the raw material liquid 300 and the nanofiber 301 in the space for a long period of time.

  The manufactured nanofiber 301 is attracted to the collecting electrode 207, and the nanofiber 301 is deposited on the collecting means 101. The collecting means 101 on which the nanofibers 301 are deposited is moved at a constant moving speed by the winding of the carrying means 102, and the cylindrical collecting electrode 207 is also rotated accordingly.

  The nanofibers 301 deposited on the collecting unit 101 as described above move together with the collecting unit 101 while forming a nonwoven fabric, and are wound around the conveying unit 102.

  As described above, the nonwoven fabric manufacturing apparatus 100 according to the present embodiment maintains the concentration in the space of the raw material liquid 300 and the manufactured nanofiber 301 in a high state and maintains the high concentration state for a long period of time. It becomes possible. Therefore, it becomes possible to continue producing high quality nonwoven fabric stably.

(Embodiment 2)
Next, another embodiment will be described. Note that in this embodiment, description of portions common to the above embodiment is omitted.

FIG. 5 is a cross-sectional view schematically showing an injection unit, a gas flow control unit, and the like.
As shown in the figure, the gas flow generating means 203 is a plurality of fins 231 attached to the peripheral wall of the other end of the rotating container 211, and changes the flight direction of the raw material liquid by rotating together with the rotating container 211. A gas flow is generated.

  The gas flow control means 204 is a flange that protrudes in the radial direction from the outer peripheral wall of the rotating container 211, and has a thin annular shape. Further, the gas flow control means 204 is disposed between the ejection port 206 and the fin 231 and controls the gas flow so that the gas flow generated by the fin 231 does not reach the vicinity of the ejection port 206.

The rotating container 211 is connected to charging means 202 having a charging power source 224.
This makes it possible to achieve the same operations and effects as described above with a simple structure.

(Embodiment 3)
Next, another embodiment will be described. Note that in this embodiment, description of portions common to the above embodiment is omitted.

FIG. 6 is a cross-sectional view schematically showing an injection unit, a gas flow control unit, and the like.
The rotating container 211 has a truncated cone shape with a large diameter on the gas flow generating means 203 side, and the large diameter portion also has a function as the gas flow control means 204 for controlling the gas flow. Therefore, the vicinity of the other end portion of the rotating container 211 prevents the gas flow from reaching the vicinity of the injection port 206.

  The gas flow generation means 203 includes fins 231 arranged in an annular shape, and can generate a gas flow in a cylindrical shape. Therefore, the gas flow generation means 203 can generate a gas flow so that the gas flow does not hit the injection port 206, and also has a function as the gas flow control means 204.

  The diameter of the rotating container 211 is preferably about 10 mm to 100 mm. The rotational speed of the motor 213 is preferably between several hundred rpm and 10,000 rpm. The diameter of the ejection port 206 is preferably about 0.01 mm to 2 mm. The size of the induction electrode 221 needs to be larger than the diameter of the rotating container 211, and the diameter is preferably between 200 mm and 600 mm. The voltages of the power sources of the induction power source 222, the charging power source 224, and the collection power source 208 are preferably set in the range of 10 KV to 200 KV.

  In the above-described embodiment, the description has been made based on the apparatus for injecting the raw material liquid 300 by centrifugal force. However, the present invention is not limited to this. For example, the raw material liquid 300 may be injected by pressure.

  INDUSTRIAL APPLICABILITY The present invention is applicable to a nanofiber manufacturing apparatus, an apparatus for spinning using the manufactured nanofiber, an apparatus for manufacturing a nonwoven fabric using the manufactured nanofiber, and the like.

It is a perspective view showing roughly the nonwoven fabric manufacturing device concerning the present invention. It is a side view which shows a nonwoven fabric manufacturing apparatus typically. It is sectional drawing which shows an injection means, a gas flow control means, etc. roughly. It is a perspective view which shows roughly the external appearances, such as an injection means and a gas flow control means. It is sectional drawing which shows an injection means, a gas flow control means, etc. roughly. It is sectional drawing which shows an injection means, a gas flow control means, etc. roughly.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Nonwoven fabric manufacturing apparatus 101 Collecting means 102 Conveying means 103 Partition wall 104 Gas supply source 105 Exhaust device 106 Raw material liquid supply path 111 Supply roll 200 Nanofiber manufacturing apparatus 201 Injection means 202 Charging means 203 Gas flow generation means 204 Gas flow control means 205 Heating Means 206 Injection port 207 Collection electrode 208 Collection power supply 211 Rotating container 212 Rotating shaft body 213 Motor 214 Flange 221 Induction electrode 222 Induction power supply 223 Grounding means 224 Charging power supply 231 Fin 241 Inlet 242 Outlet 243 Air path 300 Raw material liquid 301 Nano fiber

Claims (6)

An injection means having an injection port for injecting a raw material liquid as a raw material of the nanofiber into the space; a charging means for applying an electric charge to the raw material liquid for charging; and the injected raw material liquid or the manufactured nanofiber A nanofiber manufacturing apparatus comprising a gas flow generating means for generating a gas flow for changing a flight direction,
A nanofiber manufacturing apparatus comprising gas flow control means for controlling the gas flow so that the gas flow generated by the gas flow generation means does not hit the injection port.   2. The nanofiber manufacturing apparatus according to claim 1, wherein the gas flow control means is a windshield disposed upstream of the gas flow with respect to the injection port.   The nanofiber manufacturing apparatus according to claim 1, wherein the gas flow control means is an air passage body that guides the gas flow so as to flow in a predetermined region. further,
The nanofiber manufacturing apparatus according to claim 1, further comprising a heating unit that heats a gas constituting the gas flow generated by the gas flow generation unit. Injecting means comprising an injection port for injecting a raw material liquid as a raw material of nanofibers into the space,
Charging means for charging by charging the raw material liquid;
A gas flow generating means for generating a gas flow for changing a flight direction of the jetted raw material liquid or the manufactured nanofiber; and
Gas flow control means for controlling the gas flow so that the gas flow generated by the gas flow generation means does not hit the injection port;
A collecting means for collecting nanofibers produced in the space;
A non-woven fabric manufacturing apparatus comprising transport means for transporting collected nanofibers. An injection step of injecting the raw material liquid by an injection means including an injection port for injecting a raw material liquid to be a raw material of the nanofiber into the space;
A charging step of charging by charging the raw material liquid; and
A gas flow generating step for generating a gas flow for changing a flight direction of the jetted raw material liquid or the manufactured nanofiber; and
And a gas flow control step of controlling the gas flow so that the raw material liquid injected from the injection port hits the gas flow generated by the gas flow generation means after flying a predetermined distance from the injection port.

Images