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WO2011070761A1 - Appareil de production d'une nano-fibre et procédé de production d'une nano-fibre - Google Patents

Appareil de production d'une nano-fibre et procédé de production d'une nano-fibre Download PDF

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Publication number
WO2011070761A1
WO2011070761A1 PCT/JP2010/007087 JP2010007087W WO2011070761A1 WO 2011070761 A1 WO2011070761 A1 WO 2011070761A1 JP 2010007087 W JP2010007087 W JP 2010007087W WO 2011070761 A1 WO2011070761 A1 WO 2011070761A1
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WO
WIPO (PCT)
Prior art keywords
nanofiber
insulating layer
nanofibers
electrode
deposited
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2010/007087
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English (en)
Japanese (ja)
Inventor
和宜 石川
寛人 住田
崇裕 黒川
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Corp
Original Assignee
Panasonic Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Panasonic Corp filed Critical Panasonic Corp
Priority to CN201080055418.2A priority Critical patent/CN102652189B/zh
Priority to US13/514,098 priority patent/US20120242010A1/en
Priority to DE112010004745T priority patent/DE112010004745T5/de
Publication of WO2011070761A1 publication Critical patent/WO2011070761A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
    • D04H1/72—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged
    • D04H1/728—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged by electro-spinning
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D13/00—Complete machines for producing artificial threads
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/0007—Electro-spinning
    • D01D5/0061—Electro-spinning characterised by the electro-spinning apparatus
    • D01D5/0069—Electro-spinning characterised by the electro-spinning apparatus characterised by the spinning section, e.g. capillary tube, protrusion or pin
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/0007—Electro-spinning
    • D01D5/0061—Electro-spinning characterised by the electro-spinning apparatus
    • D01D5/0076—Electro-spinning characterised by the electro-spinning apparatus characterised by the collecting device, e.g. drum, wheel, endless belt, plate or grid

Definitions

  • the present invention relates to a nanofiber manufacturing apparatus and a nanofiber manufacturing method for manufacturing a fiber (nanofiber) having a fineness of submicron order or nano order by an electrostatic stretching phenomenon.
  • This electrostatic stretching phenomenon means that a raw material liquid in which a solute such as a resin is dispersed or dissolved in a solvent is discharged (injected) into the space by a nozzle or the like, and an electric charge is applied to the raw material liquid to charge the space.
  • This is a method of obtaining nanofibers by electrically stretching a raw material liquid in flight.
  • the electrostatic stretching phenomenon is explained as follows. That is, the raw material liquid that has been charged and discharged into the space gradually evaporates the solvent while flying through the space. As a result, the volume of the raw material liquid in flight gradually decreases, but the charge imparted to the raw material liquid remains in the raw material liquid. As a result, the charge density of the raw material liquid in flight through the space gradually increases. Since the solvent continues to evaporate, the charge density of the raw material liquid further increases, and when the repulsive Coulomb force generated in the raw material liquid exceeds the surface tension of the raw material liquid, the raw material liquid explodes. The phenomenon that the film is stretched linearly occurs. This is the electrostatic stretching phenomenon. The electrostatic stretching phenomenon occurs geometrically in succession in the space, and thereby nanofibers made of a resin having a diameter of submicron order or nano order are manufactured.
  • a nozzle that discharges the raw material liquid into the space, and the nozzle are arranged apart from the nozzle. And an electrode to which a high voltage is applied.
  • the nanofibers produced in the space are attracted by the electric field generated between the nozzle and the electrode and are deposited on the electrode.
  • the nanofiber manufacturing apparatus described in Patent Document 1 arranges a plurality of nozzles in a matrix and arranges a control plate or the like between the nozzles in order to suppress electrical influence between the nozzles.
  • the nanofibers are controlled to be deposited uniformly.
  • the inventors of the present application have continued experiments and research in order to improve the uniformity of the nanofiber deposition state.
  • the outflow body such as the nozzle from which the raw material liquid flows out
  • the nanofiber It has been found that the uniformity of the deposited state of the nanofibers is also lost depending on the state of the electrode on which it is deposited. For example, it has been found that when nanofibers are deposited on an insulating member to be deposited disposed on the electrode side, the uniformity of the nanofiber deposition state is lost. And it discovered that this phenomenon originated in the nonuniformity of the charging state of a to-be-deposited member.
  • nanofibers are deposited directly on the electrode without passing through a member to be deposited, nanofibers are gradually deposited on the electrode side and deposited. It has also been found that the uniformity of the deposited state is greatly destroyed as the deposition of nanofibers is repeated, since it affects the nanofibers that have been changed (which causes uneven charging on the electrodes) and accumulates later.
  • the present invention has been made on the basis of the above knowledge, and aims to provide a nanofiber manufacturing apparatus and a nanofiber manufacturing method capable of depositing nanofibers while maintaining high uniformity of the deposition state.
  • a nanofiber production apparatus for producing nanofibers by electrically stretching a raw material liquid for producing nanofibers in a space
  • An outflow body having an outflow hole for allowing the raw material liquid to flow into the space, a charging electrode arranged at a predetermined interval from the outflow body, and charging the outflow body, and a predetermined amount between the outflow body and the charging electrode
  • a charging power source for applying a voltage of 1 and an attracting electrode for generating an electric field for attracting nanofibers produced in space, the attracting electrode having a planar deposition region on the surface for depositing the attracted nanofibers,
  • An attracting power source for applying a predetermined potential to the attracting electrode, and an insulating layer disposed on the entire surface of the attracting electrode and on the deposition region are provided.
  • the nanofiber to be deposited and the attracting electrode since an insulating layer is interposed between the nanofiber to be deposited and the attracting electrode, it is possible to prevent the charge from flowing between the nanofiber and the attracting electrode in a part of the deposition region, and the charge existing in the depositing region. Can be prevented from becoming non-uniform. Accordingly, the density of the charge remaining in the nanofiber is uniform throughout the deposition region, and the nanofiber can be attracted in a uniform state and deposited in a uniform state without disturbing the electric field generated from the attracting electrode.
  • a nanofiber manufacturing method is a nanofiber manufacturing method for manufacturing nanofibers by electrically stretching a raw material liquid for manufacturing nanofibers in a space,
  • the raw material liquid flows out from an effluent having an outflow hole for allowing the raw material liquid to flow out into the space, and is disposed between the effluent and a charging electrode arranged at a predetermined interval and charging the effluent.
  • a predetermined voltage is applied by a power source, a planar deposition region for depositing nanofibers is provided on the surface, and a predetermined potential is applied by an attraction power source to an attracting electrode having an insulating layer disposed over the entire deposition region.
  • the nanofiber to be deposited and the attracting electrode since an insulating layer is interposed between the nanofiber to be deposited and the attracting electrode, it is possible to prevent the charge from flowing between the nanofiber and the attracting electrode in a part of the deposition region, and the charge existing in the depositing region. Can be prevented from becoming non-uniform. Accordingly, the density of the charge remaining in the nanofiber is uniform throughout the deposition region, and the nanofiber can be attracted in a uniform state and deposited in a uniform state without disturbing the electric field generated from the attracting electrode.
  • nanofibers can be further deposited without being significantly affected by the charged state of nanofibers previously deposited on the attracting electrode, and a non-woven fabric of uniform quality can be manufactured over the entire deposition region. Is possible.
  • FIG. 1 is a perspective view showing a nanofiber manufacturing apparatus.
  • FIG. 2 is a side view of the main part of the nanofiber manufacturing apparatus with a part cut away.
  • FIG. 3 is a perspective view showing the outflow body in a cutaway manner.
  • FIG. 4 is a perspective view showing the nanofiber manufacturing apparatus.
  • FIG. 5 is a side view of the main part of the nanofiber manufacturing apparatus with a part cut away.
  • 6A is a perspective view showing another example of the effluent
  • FIG. 6B is a side view showing a part of another example of the effluent.
  • FIG. 7 is a perspective view showing a nanofiber manufacturing apparatus according to another embodiment.
  • FIG. 8 is a perspective view showing a nanofiber manufacturing apparatus according to another embodiment.
  • FIG. 8 is a perspective view showing a nanofiber manufacturing apparatus according to another embodiment.
  • FIG. 9 is a plan view showing one variation of the relationship among the insulating layer, the attracting electrode, and the member to be deposited from the side.
  • FIG. 10 is a plan view showing one variation of the relationship among the insulating layer, the attracting electrode, and the member to be deposited from the side.
  • FIG. 11 is a plan view showing one variation of the relationship among the insulating layer, the attracting electrode, and the member to be deposited from the side.
  • FIG. 12 is a plan view showing one variation of the relationship among the insulating layer, the attracting electrode, and the member to be deposited from the side.
  • FIG. 1 is a perspective view showing a nanofiber manufacturing apparatus.
  • FIG. 2 is a side view of the main part of the nanofiber manufacturing apparatus with a part cut away.
  • the nanofiber manufacturing apparatus 100 is an apparatus that manufactures the nanofiber 301 by electrically stretching the raw material liquid 300 for manufacturing the nanofiber 301 in the space, and the effluent 115.
  • the attracting electrode 121 also functions as the charging electrode 128. That is, one electrode functions as the attracting electrode 121 and also functions as the charging electrode 128. Further, the attracting power source 123 also functions as the charging power source 122. That is, one power source functions as the attracting power source 123 and also functions as the charging power source 122.
  • the raw material liquid 300 and the nanofiber 301 are described separately for convenience, but in the manufacturing process of the nanofiber 301, that is, at the stage where the electrostatic stretching phenomenon occurs, the raw material liquid Since the nanofiber 301 is gradually manufactured from 300, the boundary between the raw material liquid 300 and the nanofiber 301 is not necessarily clear.
  • FIG. 3 is a perspective view showing the spilled body cut away.
  • the outflow body 115 is a member for causing the raw material liquid 300 to flow out into the space by the pressure of the raw material liquid 300 (which may include gravity), and includes an outflow hole 118 and a storage tank 113.
  • the outflow body 115 also functions as an electrode for supplying an electric charge to the raw material liquid 300 that flows out, and at least a part of the portion in contact with the raw material liquid 300 is formed of a conductive member.
  • the entire outflow body 115 is made of metal.
  • Arbitrary materials such as brass and stainless steel, can be selected.
  • the outflow hole 118 is a hole for allowing the raw material liquid 300 to flow out in a certain direction.
  • a plurality of outflow holes 118 are provided in the outflow body 115, and a front end opening 119 at the front end of the outflow hole 118 is arranged side by side on an elongated strip-like surface provided in the outflow body 115. It is provided to be.
  • the outflow hole 118 is provided in the outflow body 115 so that the outflow direction of the raw material liquid 300 flowing out from the outflow hole 118 is the same as the outflow body 115.
  • the hole length and hole diameter of the outflow hole 118 are not particularly limited, and a shape suitable for the viscosity of the raw material liquid 300 may be selected.
  • the hole length is preferably selected from a range of 1 mm or more and 5 mm or less.
  • the hole diameter is preferably selected from a range of 0.1 mm or more and 2 mm or less.
  • the shape of the outflow hole 118 is not limited to a cylindrical shape, and an arbitrary shape can be selected.
  • the shape of the tip opening 119 is not limited to a circular shape, and may be a polygonal shape such as a triangle or a quadrangle, or a shape having a portion protruding inward such as a star shape.
  • the effusing body 115 may move with respect to the charging electrode 128.
  • the nanofiber manufacturing apparatus 100 includes a supply means 107.
  • the supply means 107 is a device that supplies the raw material liquid 300 to the effluent body 115, a container 151 that stores the raw material liquid 300 in a large amount, a pump (not shown) that conveys the raw material liquid 300 at a predetermined pressure, and a raw material And a guide tube 114 for guiding the liquid 300.
  • the attracting electrode 121 is an electrode that generates an electric field that attracts the nanofiber 301 manufactured in the space, and is an electrode having a planar deposition region A on which the attracted nanofiber 301 is deposited.
  • the attracting electrode 121 is disposed at a predetermined interval from the outflow body 115 and also functions as a charging electrode 128 that is a member to which a high voltage is applied between the outflow body 115.
  • the attracting electrode 121 is also a member that collects charges in the outflow body 115 and charges the raw material liquid 300 by a high voltage applied between the outflow body 115 and the attracting electrode 121 functioning as the charging electrode 128.
  • the attracting electrode 121 (charging electrode 128) is a member made of a block-shaped conductor having a curved surface so as to gently protrude toward the outflow body 115 (in the z-axis direction).
  • the charging electrode 128 is grounded.
  • the member 201 (described later) placed on the attracting electrode 121 (charged electrode 128) is also curved so that the portion where the nanofibers 301 are deposited protrudes. Can do.
  • the attracting electrode 121 (charging electrode 128) may have a flat surface as well as a curved shape.
  • the attracting power source 123 is a power source that applies a predetermined potential to the attracting electrode 121.
  • the attraction power source 123 also functions as a charging power source 122 that can apply a high voltage between the effluent body 115 and the attraction electrode 121 (charging electrode 128).
  • the attraction power source 123 (charging power source 122) is a DC power source, and the voltage to be applied is preferably set from a value in the range of 5 kV or more and 100 kV or less.
  • the attracting power source 123 (charging power source 122) is set to the ground potential and the attracting electrode 121 (charging electrode 128) is grounded, a relatively large attracting electrode 121 (charging) The electrode 128) can be grounded, which can contribute to the improvement of safety.
  • the structure of the nanofiber manufacturing apparatus 100 can be simplified by combining the function of the attracting electrode 121 and the function of the charging electrode 128 in one conductive member. As a result, the portion to which the high voltage is applied is simplified, so that safety can be sufficiently maintained even if a simple insulating structure is employed, and the device cost can be reduced.
  • a power source may be connected to the attracting electrode 121 (charged electrode 128) to maintain the attracting electrode 121 (charged electrode 128) at a high voltage, and the effluent 115 may be grounded to apply a charge to the raw material liquid 300. . Further, the attracting electrode 121 (charging electrode 128) and the effluent body 115 may be in a connected state where they are not grounded.
  • the insulating layer 101 (see FIG. 2) is a layer having an insulating property for suppressing variation in resistance value due to the deposited nanofibers 301 in the deposition region A, and is disposed over the entire deposition region A.
  • the insulating layer 101 is a layer that suppresses variations in resistance values generated by the base material layer 200 and the deposited nanofibers 301 and falls within an allowable range, and the attracting electrode 121 (charging electrode 128). ), And is a member disposed over the entire deposition region A.
  • the material which comprises the insulating layer 101 is not specifically limited, It is desirable to comprise with the material whose volume resistivity is 1 * 10 ⁇ 15 (ohm * cm) or more ( ⁇ shows a power). In this manner, when the insulating layer 101 is formed using a substance having a high volume resistivity, the film thickness resistance value, which is the resistance value in the film thickness direction (z-axis direction), can be maintained high even if the insulating layer 101 is thinned. .
  • the nanofiber 301 and the attracting electrode 121 are partially formed in a part of the deposition region of the nanofiber 301 without greatly affecting the electric field generated between the effluent 115 and the attracting electrode 121 (charged electrode 128). 128) and the charge existing in the deposition region of the nanofiber 301 can be prevented from becoming non-uniform.
  • the volume resistivity of the material constituting the insulating layer 101 is preferably 10 times or more the volume resistivity of the material (solute) constituting the nanofiber 301 to be manufactured or the member 201 to be deposited.
  • the volume resistivity of the material constituting the insulating layer 101 is preferably 10 times or more the material (solute) constituting the nanofiber 301 or the volume resistivity of the member 201 to be deposited.
  • the film thickness resistance value which is the resistance value in the film thickness direction (z-axis direction), is preferably 10 times or more the film thickness resistance value of the nanofiber 301 or the member 201 to be deposited. Even under such conditions, it is possible to obtain a non-woven fabric that is a deposit of nanofibers 301 of uniform quality over the entire deposition region A.
  • the material constituting the insulating layer 101 is preferably composed of a material having a dielectric strength of 20 (kV / mm) or more. Since a voltage selected from the range of 5 kV or more and 100 kV or less is applied between the outflow body 115 and the attracting electrode 121 (charging electrode 128), the insulating layer is made of a material having a dielectric strength of less than 20 (kV / mm). This is because the possibility of the occurrence of dielectric breakdown increases and the stability of the quality of the nanofiber 301 in the deposition region A cannot be maintained if the 101 is configured.
  • Examples of preferred materials constituting the insulating layer 101 include polyethylene, polypropylene, PTFE, vinyl chloride, and silicon rubber.
  • silicon rubber is considered to be particularly suitable because it can be easily adjusted to characteristics that meet the above conditions.
  • the base material layer 200 is a layer on which the nanofibers 301 manufactured in the space are deposited, and is a layer disposed on the surface of the insulating layer 101 so as to cover the deposition region A. Therefore, the nanofiber 301 already deposited is also included in the base material layer 200.
  • the base material layer 200 also includes a member to be deposited 201 for collecting the deposited nanofibers 301.
  • the member 201 to be deposited is a sheet-like member having insulating properties, is movable, and is supplied while being wound around the supply roll 127. Further, the member 201 to be deposited can be moved in the direction indicated by the arrow in FIG. Further, the member 201 to be deposited is disposed along the curvature of the attracting electrode 121 (charging electrode 128) and is disposed in the vicinity of both end edges of the attracting electrode 121 (charging electrode 128) so as to be movable. It is pressed from above by a stick-shaped pressing member 125 to be attached.
  • the feeding direction of the deposition target member 201 is described so as to coincide with the arrangement direction of the outflow holes 118 in FIG. 1, the feeding direction of the deposition target member 201 is not limited to this.
  • the deposition direction of the member 201 to be deposited may be along a direction perpendicular to the arrangement direction of the outflow holes 118 (longitudinal direction of the outflow body 115).
  • the insulating layer 101 is preferably a layer that can continue to satisfy the following expression until the deposited thickness of the nanofiber 301 reaches a desired thickness. That is, when the insulating layer 101 and the base material layer 200 are combined, the maximum value in the deposition region A of the resistance value in the thickness direction (hereinafter referred to as “total film thickness resistance value”) is defined as rmax, and the total film thickness resistance.
  • the minimum value in the deposition region A is rmin
  • the average value of the total film thickness resistance value in the deposition region A is R
  • the allowable variation is k
  • the allowable value k of the variation varies depending on required specifications of the nonwoven fabric obtained by depositing the nanofibers 301.
  • the allowable value k is preferably 0.1 or less, and may be 0.3 or less. .
  • the film thickness resistance value of the insulating layer 101 is sufficiently higher than the film thickness resistance value of the deposition target member 201 and the deposited nanofiber 301, and the film thickness resistance value of the insulating layer 101 is sufficiently uniform in the deposition region A. Then, the insulating layer 101 can satisfy the above formula.
  • the raw material liquid 300 is supplied to the effluent 115 by the supply means 107 (supply process). As described above, the raw material liquid 300 is filled in the storage tank 113 of the effluent 115.
  • the resin constituting the nanofiber 301 and the solute dissolved or dispersed in the raw material liquid 300 includes 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 Coalesced, polycarbonate, polyarylate, polyester carbonate, polyamide, aramid, polyimide, polycaprolactone, polylactic acid, polyglycol , Collagen, polyhydroxybutyrate, poly (vinyl acetate), polypeptide or the like and can be exemplified a polyprop
  • Examples of the solvent used for the raw material liquid 300 include volatile organic solvents. Specific examples include 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, benzoate Propyl acid, methyl acetate, ethyl acetate, propyl acetate, dimethyl phthalate, diethyl phthalate, dipropyl phthalate, methyl chloride, ethyl chloride, methylene chloride, chloroform, o-chloroto Ene, p-chlorotoluene, chloroform, carbon tetrachloride, 1,1-dichloroethane, 1,2-dichloroethane, trichloroethane, dichloropropane, dibromoe
  • an inorganic solid material may be added to the raw material liquid 300.
  • the inorganic solid material include oxides, carbides, nitrides, borides, silicides, fluorides, sulfides, and the like. From the viewpoint of heat resistance and workability of the nanofiber 301 to be manufactured. It is preferable to use an oxide.
  • the oxide 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.
  • the mixing ratio of the solvent and the solute in the raw material liquid 300 varies depending on the type of solvent selected and the type of solute, but the amount of solvent is preferably between about 60 wt% and 98 wt%.
  • the solute is preferably 5 to 30% by weight.
  • the outflow body 115 is set to a positive or negative high voltage by the induction power source 123 (charging power source 122).
  • Charging power source 122 Charge concentrates at the tip of the effluent 115 facing the attracting electrode 121 (charged electrode 128) that is grounded, and the charge passes through the outflow hole 118 and is transferred to the raw material liquid 300 that flows out into the space.
  • the liquid 300 is charged (charging process).
  • the charging process and the supplying process are performed at the same time, and the charged raw material liquid 300 flows out from the front end opening 119 of the outflow body 115 (outflow process).
  • the nanofiber 301 is manufactured by the action of the electrostatic stretching phenomenon on the raw material liquid 300 that has flew in the space to some extent (the nanofiber manufacturing process).
  • Nanofiber 301 flies toward the attracting electrode 121 (charged electrode 128) along the electric field generated between the effluent body 115 and the attracting electrode 121 (charged electrode 128). Nanofibers 301 are deposited and collected (deposition process).
  • the collecting means 129 is operated to move the deposition target member 201 and collect the deposited nanofibers 301 together with the deposition target member 201 (recovery step).
  • the thickness of the base layer 200 increases as the nanofibers 301 are deposited. It is possible to prevent the electric charge charged in the fiber 301 from flowing locally to the attracting electrode 121 (charging electrode 128), and to obtain a deposit (nonwoven fabric) of uniform quality in the nanofiber 301. Furthermore, by making the film thickness resistance value of the insulating layer 101 sufficiently high and uniform, the nanofibers 301 can be deposited without being greatly affected by the nanofibers 301 deposited earlier. Even when the fiber 301 is deposited thickly, it is possible to obtain a deposit (nonwoven fabric) of nanofibers 301 of uniform quality in the deposition region A.
  • Nanofiber manufacturing apparatus 100 is an apparatus in which nanofibers 301 are deposited directly on insulating layer 101.
  • the nanofiber manufacturing apparatus 100 includes the attracting electrode 121 and the charging electrode 128 as separate bodies, and the potential applied to the attracting electrode 121 and the charging electrode 128 can be adjusted independently.
  • this Embodiment is only what showed an example of this invention like the said Embodiment 1, and shows one of the variations of the nanofiber manufacturing apparatus 100 which can implement
  • the effluent body 115 in which a plurality of nozzles shown below are arranged in a row is the effluent body 115 described in the first embodiment (a plurality of outflow holes 118 are arranged in a row and connected in common with these outflow holes 118.
  • the storage tank 113 may be replaced. That is, the essence of the present invention is the insulating layer 101 disposed on the surface of the attracting electrode 121, and the difference between the other components does not affect the present invention. Therefore, even in the nanofiber manufacturing apparatus 100 shown in the present embodiment, the attracting electrode 121 may have the function as the charging electrode 128 as shown in the first embodiment.
  • FIG. 4 is a perspective view showing the nanofiber manufacturing apparatus.
  • FIG. 5 is a side view of the nanofiber manufacturing apparatus with a part cut away.
  • the nanofiber manufacturing apparatus 100 includes an outflow body 115 in which a plurality of nozzles are arranged in a row.
  • a round bar-shaped charging electrode 128 is arranged in the vicinity of the tip opening 119 of the nozzles arranged in a row.
  • two charging electrodes 128 are disposed in the vicinity of the tip opening 119 of the outflow hole 118 along the arrangement of the nozzles. As described above, the charging electrode 128 is disposed in the vicinity of the tip opening 119 of the outflow hole 118, so that the voltage applied between the outflow body 115 and the charging electrode 128 can be set to a relatively low value. It becomes.
  • the attracting electrode 121 is a rectangular plate-like conductive member.
  • the insulating layer 101 is provided over the entire surface facing the outflow body 115 on the surface of the attracting electrode 121. Note that the characteristics, such as properties and materials, of the insulating layer 101 in this embodiment are the same as those of the insulating layer 101 in the first embodiment.
  • the attracting power source 123 is a power source that can generate an electric field from the attracting electrode 121 that can attract the nanofiber 301 manufactured in the space to the deposition region A.
  • the attracting electrode 121 that does not substantially contribute to the charging of the raw material liquid 300 and has the insulating layer 101 on the surface of the attracting electrode 121 that attracts the nanofiber 301 manufactured exclusively in the space.
  • the thickness of the base layer 200 increases as the nanofibers 301 are deposited, but the deposited nanofibers 301 are deposited by the insulating layer 101. It is possible to prevent the charged electric charges from flowing locally to the attracting electrode 121, and to obtain a deposit (nonwoven fabric) of uniform quality on the nanofiber 301.
  • the nanofibers 301 can be deposited without being greatly affected by the nanofibers 301 deposited earlier. Even when the fiber 301 is deposited thickly, it is possible to obtain a deposit (nonwoven fabric) of nanofibers 301 of uniform quality in the deposition region A.
  • the potential applied to the attracting electrode 121 can be set to be relatively low as compared with the case of Embodiment 1, the dielectric strength as a material constituting the insulating layer 101 is relatively high. It is possible to adopt a material having a low level. Accordingly, it is possible to widen the selection range of the material constituting the insulating layer 101.
  • the present invention is not limited to the above embodiment.
  • another embodiment realized by arbitrarily combining the components described in this specification may be the present invention.
  • the present invention includes modifications obtained by making various modifications conceivable by those skilled in the art without departing from the gist of the present invention, that is, the meaning described in the claims. It is.
  • the outflow body 115 has a cylindrical shape and is provided with an outflow hole 118 in the peripheral wall.
  • the outflow body 115 is rotated by the rotational driving force of the motor 303.
  • the raw material liquid 300 may be allowed to flow out into the space by centrifugal force.
  • the attracting electrode 121 (charging electrode 128) is not limited to a single one, but may be separated into a plurality as shown in FIG.
  • the insulating layer 101 is a member having a flat plate-like insulating property, and is disposed so as to straddle the entire attracting electrode 121.
  • FIG. 8 is a perspective view showing the nanofiber manufacturing apparatus 100 according to the present embodiment.
  • the nanofiber manufacturing apparatus 100 includes an endless belt-like insulating layer 101, a circulating means 130 that holds the endless belt-like insulating layer 101 so as to be movable in a circulating state, and the manufactured nanofibers include A member 201 to be deposited as a base material layer 200 to be deposited is provided on the surface of the insulating layer 101 so as to cover the deposition region A and moves together with the insulating layer 101.
  • members, devices, and the like having the same functions as those of the first and second embodiments are denoted by the same reference numerals, and description thereof is omitted.
  • the insulating layer 101 is formed by joining the end portions of sheet-like members so as to form an endless belt.
  • a core material that ensures structural strength is preferably coated with a resin having the above insulating performance.
  • the core material is not particularly limited, and examples thereof include polyester fabrics, and examples of the coating material that enhances the insulation performance include silicon rubber, polypropylene, and vinyl chloride. .
  • the circulating means 130 includes two rollers 131 that stretch the insulating layer 101 by applying a certain amount of tension and hold the insulating layer 101 in a direction that can be circulated in the direction of the arrow in the figure.
  • the roller 131 is a free roller that can freely rotate about an axis.
  • the roller 131 may include not only a free roller but also a power source and actively circulate the insulating layer 101. Further, the roller 131 may function as the attracting electrode 121.
  • the base material layer 200 also includes a deposition target member 201 for collecting the deposited nanofibers 301 as in the above-described embodiment.
  • the member 201 to be deposited is supplied in a state of being wound around the supply roll 127 and wound around the collecting means 129 so that it can be moved in the direction indicated by the arrow in the drawing.
  • the attracting electrode 121 is disposed so as to be surrounded by the track of the insulating layer 101, and is disposed at a position where the insulating layer 101 can be sandwiched between the deposition target member 201 and the attracting electrode 121.
  • the attracting electrode 121 is a plurality of cylindrical members and can rotate following the movement of the insulating layer 101.
  • the insulating layer 101 since the insulating layer 101 can move in a circulating manner following the movement of the deposition target member 201, the insulating layer 101 is interposed between the insulating layer 101 and the deposition target member 201 (base material layer 200). Friction strengthened by the generated electric attractive force can be suppressed as much as possible, and damage to the insulating layer 101 and the deposition target member 201 due to friction can be suppressed. Therefore, the wear of the insulating layer 101 can be suppressed, the life of the nanofiber manufacturing apparatus 100 can be improved, and the quality of the recovered nanofiber 301 can be maintained in a high state.
  • the relationship between the insulating layer 101, the attracting electrode 121, and the member 201 to be deposited is not limited to the above, and various variations can be presented.
  • the attracting electrode 121 may be a fixed plate-like member.
  • the nanofiber 301 can be attracted in a wide range.
  • the attracting electrode 121 may be an endless belt made of a flexible sheet-like conductive member, and this may be moved by two rollers in the same manner as the insulating layer 101.
  • the nanofiber 301 can be attracted in a wide range and the friction with the insulating layer 101 can be reduced as in the case shown in FIG.
  • the attracting electrode 121 is a large roller
  • the insulating layer 101 is provided on the surface of the attracting electrode 121, and both the attracting electrode 121 and the insulating layer 101 are rotated in synchronization with the movement of the member 201 to be deposited. It does not matter if you let it.
  • the insulating layer 101 may be provided on the surface of the flexible and conductive endless belt-like attracting electrode 121, and the attracting electrode 121 may be set at a predetermined potential via a roller 131.
  • the present invention can be used for spinning using nanofibers and for producing nonwoven fabrics.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Nonwoven Fabrics (AREA)
  • Artificial Filaments (AREA)

Abstract

La présente invention concerne un appareil de production d'un sédiment de nano-fibre présentant une épaisseur et une qualité uniformes. L'appareil est pourvu : d'un composant d'évacuation (115) présentant une ouverture d'évacuation (118) à travers laquelle une matière première liquide (300) est évacuée dans un espace ; une électrode chargée (128) disposée avec un espace prédéterminé entre l'électrode chargée (128) et le composant d'évacuation (115) ; un approvisionnement en courant de chargement (122) appliquant une tension prédéterminée sur toute l'étendue du composant d'évacuation (115) et de l'électrode chargée (128) ; une électrode d'attraction (121) destinée à produire un champ électrique servant à attirer une nano-fibre (301) fabriquée dans l'espace, l'électrode d'attraction (121) présentant une surface comprenant une zone d'accumulation plate (A) dans laquelle la nano-fibre attirée (301) est accumulée ; un approvisionnement en courant d'attraction (123) appliquant un potentiel prédéterminé sur l'électrode d'attraction (121) ; et une couche isolante (101) disposée au-dessus de toute la zone d'accumulation (A) pour réduire les variations de résistance provoquées par la nano-fibre accumulée dans la zone d'accumulation (A).
PCT/JP2010/007087 2009-12-10 2010-12-06 Appareil de production d'une nano-fibre et procédé de production d'une nano-fibre Ceased WO2011070761A1 (fr)

Priority Applications (3)

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CN201080055418.2A CN102652189B (zh) 2009-12-10 2010-12-06 纳米纤维制造装置以及纳米纤维制造方法
US13/514,098 US20120242010A1 (en) 2009-12-10 2010-12-06 Nanofiber manufacturing apparatus and method of manufacturing nanofibers
DE112010004745T DE112010004745T5 (de) 2009-12-10 2010-12-06 Vorrichtung zur Herstellung von Nanofasern und Verfahren zur Herstellung von Nanofasern

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JP2009-280855 2009-12-10

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DE (1) DE112010004745T5 (fr)
WO (1) WO2011070761A1 (fr)

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US20120242010A1 (en) 2012-09-27
DE112010004745T5 (de) 2013-02-07
CN102652189B (zh) 2016-01-27
CN102652189A (zh) 2012-08-29
JP5437983B2 (ja) 2014-03-12
KR20120095947A (ko) 2012-08-29

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