WO2012077873A1 - Procédé et dispositif pour la fabrication de nanofibres - Google Patents

Procédé et dispositif pour la fabrication de nanofibres Download PDF

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Publication number
WO2012077873A1
WO2012077873A1 PCT/KR2011/003065 KR2011003065W WO2012077873A1 WO 2012077873 A1 WO2012077873 A1 WO 2012077873A1 KR 2011003065 W KR2011003065 W KR 2011003065W WO 2012077873 A1 WO2012077873 A1 WO 2012077873A1
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WIPO (PCT)
Prior art keywords
thickness
long sheet
feed rate
thickness measuring
nanofiber
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PCT/KR2011/003065
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English (en)
Korean (ko)
Inventor
이재환
김익수
Original Assignee
주식회사 톱텍
신슈 다이가쿠
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Publication of WO2012077873A1 publication Critical patent/WO2012077873A1/fr

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    • 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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
    • 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
    • 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
    • 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
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
    • D04H3/16—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between thermoplastic filaments produced in association with filament formation, e.g. immediately following extrusion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y40/00—Manufacture or treatment of nanostructures

Definitions

  • FIG. 15 is a diagram for explaining a nanofiber production apparatus 900 using the nanofiber production method described in Patent Document 1.
  • numeral 910 denotes a nozzle block
  • numeral 912 denotes a nozzle
  • numeral 920 denotes a blower
  • numeral 922 denotes a wind direction control plate
  • numeral 924 denotes an edge member
  • numeral 926 denotes a suction device.
  • 928 denotes a fan
  • 950 denotes a collector.
  • the nanofiber manufacturing method of patent document 1 volatilized by forming an airflow in the spinning zone which consists of the blower 920, the two edge members 924, and the suction device 926. By removing a solvent or floating impurities, the spinning conditions in the field spinning process are adjusted.
  • an object of the present invention is to provide a nanofiber manufacturing apparatus and a nanofiber manufacturing method capable of mass-producing a nanofiber nonwoven fabric having a uniform thickness.
  • the nanofiber manufacturing apparatus of the present invention includes a conveying apparatus for conveying a long sheet at a predetermined conveying speed, a spinning apparatus for depositing nanofibers on a long sheet being conveyed by the conveying apparatus, and a nanofiber by the spinning apparatus. And a feed rate control device for controlling the feed rate based on the thickness measured by the thickness measuring device.
  • the feed rate control device controls the feed rate in consideration of the time change rate of the deviation amount.
  • the thickness measuring device is arranged to face each other with the long sheet interposed therebetween, and comprises a pair of laser range measuring devices for measuring the distance to the long sheet by a triangulation method. It is preferable that a thickness measuring part is provided and the thickness of the long sheet is calculated based on the distance measured by the pair of laser range finders.
  • the thickness measuring device includes a thickness measuring roller for guiding the long sheet along the circumferential direction, and an outermost circumferential portion of the long sheet being led by the thickness measuring roller. It is preferable to calculate the thickness of the long sheet by providing a thickness measuring section comprising a camera that enlarges and photographs the long sheet along the conveying direction, and image-processing the image photographed by the camera.
  • the thickness measuring device is a thickness measuring part for measuring the thickness of the long sheet, and includes a plurality of thickness measuring parts disposed at different positions in the width direction of the long sheet. desirable.
  • the feed rate control device controls the feed rate based on an average thickness obtained by averaging the thicknesses measured by the plurality of thickness measuring units.
  • the nanofiber manufacturing apparatus of the present invention it is possible to control the feed rate on the basis of the thickness measured by the thickness measuring device. Accordingly, by appropriately controlling the feed rate, it is possible to stop the variation in thickness in a predetermined range, and as a result, it becomes possible to mass produce a nanofiber nonwoven fabric having a uniform thickness.
  • the thickness is increased by slowing the feed rate to increase the deposition amount of the nanofibers per unit area. It is possible to stop the value in a predetermined range.
  • the thickness is reduced by reducing the deposition amount of the nanofibers per unit area by increasing the feed rate to reduce the thickness value. It becomes possible to stop at the range.
  • the radiation conditions such as “gap between nozzle and collector”, “voltage applied between nozzle and collector”, it is also possible to stop the value of the thickness in a predetermined range.
  • the physical properties of the nanofibers such as the diameter of the nanofibers, the density of the nanofiber layer, and fluctuate, and it is difficult to produce a nanofiber nonwoven fabric having uniform physical properties.
  • the nanofiber manufacturing apparatus of the present invention it becomes possible to mass-produce a nonwoven fabric having a uniform thickness by a simple method of controlling the feed rate based on the thickness measured by the thickness measuring apparatus. Therefore, there is no problem that it takes a certain time to adjust the spinning conditions in accordance with the variation of the thickness, and there is no problem that the physical properties of the nanofibers, such as the diameter of the nanofibers, the density of the nanofiber layer, and the like.
  • a "nano fiber” consists of a polymer and shall be a thing of the fiber of several nm-several thousand nm in average diameter.
  • a "polymer solution” means the thing of the solution which melt
  • the nanofiber manufacturing apparatus of the present invention by considering the "time variation rate of the deviation amount", it becomes possible to control the feeding speed more appropriately than in the case of controlling the feeding speed based only on the deviation amount. For example, in the case where the spinning condition changes abruptly, the rate of change in the amount of deviation is large, so that the control amount (change amount from the initial value) of the feed rate is increased to match it. In addition, when the variation amount of the spinning condition is small, since the rate of change of the variation amount is small, the control amount (change amount from the initial value) of the feed rate is made small to match it.
  • the distance between one side in a long sheet and the laser ranger located in the one side side can be calculated using the distance between the laser ranger located in the center of the laser beam and the laser distance measuring device located therein, so that the thickness of the long sheet can be accurately measured even if the long sheet to be conveyed swings up and down.
  • the thickness of the long sheet can be accurately measured.
  • the thickness can be measured over a wide area in the width direction of the long sheet, and the feed rate can be controlled more appropriately.
  • the thickness can be measured over the wide area of the long sheet in the width direction, and the feed rate can be controlled more appropriately.
  • the feeding speed is controlled more appropriately by controlling the feeding speed based on the average thickness. It becomes possible to control the speed.
  • the nanofiber production apparatus of the present invention since it is possible to completely evaporate a solvent remaining in the nanofiber layer, it is possible to produce a high quality nanofiber nonwoven fabric with a very low residual solvent amount. In addition, since it becomes possible to measure thickness in the state which evaporated the solvent completely, it becomes possible to measure thickness correctly.
  • the nanofiber manufacturing apparatus of the present invention it is possible to sequentially deposit nanofibers on a long sheet in each of a plurality of spinning apparatuses, thereby mass-producing a nanofiber nonwoven fabric having a uniform thickness at a higher productivity. It becomes possible.
  • mass-producing a nanofiber nonwoven fabric in which various kinds of nanofibers are sequentially deposited on a long sheet it is possible to mass-produce a nanofiber nonwoven fabric having a uniform thickness with higher productivity.
  • mass production of nanofiber nonwoven fabrics having a uniform thickness is achieved by simply controlling the feed rate rather than adjusting the spinning conditions in each of the plurality of spinning apparatuses. It becomes possible.
  • nanofiber manufacturing apparatus of the present invention even in a nanofiber manufacturing apparatus having an electric field emission value capable of producing a nanofiber having an extremely thin diameter (a few nm to several thousand nm) as a spinning device, It becomes possible to mass-produce the nanofiber nonwoven fabric which has.
  • nanofiber manufacturing apparatus and nanofiber manufacturing method of the present invention medical products such as high-performance and highly sensitive textiles, cosmetic-related products such as health care, skin care, industrial materials such as wiping cloth, filters, and secondary batteries Medical materials such as electronic and mechanical materials such as separators, separators of capacitors, carriers of various catalysts, various sensor materials, regenerative medical materials, biomedical materials, medical MEMS materials and biosensor materials, and a wide range of other applications. Nanofibers that can be used can be prepared.
  • FIG. 1 is a view for explaining a nanofiber production apparatus according to the first embodiment.
  • Fig. 2 is an enlarged view of the main portion of the field emission device according to the embodiment.
  • 3 is a view for explaining a thickness measuring device.
  • FIG. 4 is a top view for explaining the movement of the thickness measurement unit.
  • FIG. 5 is a flowchart for explaining a method of manufacturing nanofibers.
  • FIG. 6 is a graph showing the time variation of the thickness d, the average thickness ⁇ d>, and the feed rate (V).
  • FIG. 7 is a graph showing the time variation of the thickness d, the average thickness ⁇ d> and the feed rate V in the modification 1.
  • FIG. 8 is a flowchart for explaining a nanofiber manufacturing method in modified example 2.
  • FIG. 9 is a graph showing the time variation of the thickness d, the average thickness ⁇ d> and the feed rate V in the second modification.
  • FIG. 10 is a front view of a nanofiber production apparatus according to Example 2.
  • FIG. 10 is a front view of a nanofiber production apparatus according to Example 2.
  • FIG. 1 It is a figure for demonstrating the thickness measuring apparatus in Example 2.
  • FIG. 1 It is a figure for demonstrating the thickness measuring apparatus in Example 2.
  • 12 is a view for explaining the principle of calculating the thickness of the long sheet W by the thickness measuring unit.
  • FIG. 1 It is a figure for demonstrating the movement of the thickness measurement part in Example 3.
  • FIG. 1 It is a figure for demonstrating the movement of the thickness measurement part in Example 3.
  • the nanofiber manufacturing apparatus 1 which concerns on Example 1 is conveyed by the conveying apparatus 10 which conveys the elongate sheet
  • Thickness measurement for measuring the thickness d of the field radiating device 20 for depositing nanofibers on the long sheet W to be transferred and the long sheet W for depositing nanofibers by the field radiating device 20.
  • a device 40 and a feed rate control device 50 for controlling the feed rate V based on the thickness d measured by the thickness measuring device 40 are provided.
  • the electric field radiating apparatus As the electric field radiating apparatus, four electric field radiating apparatuses 20 arranged in series along a predetermined conveying direction a to which the long sheet W is conveyed are provided. It is provided.
  • the nanofiber manufacturing apparatus 1 according to Example 1 is disposed between the electric field radiating apparatus 20 and the thickness measuring apparatus 40, and a heating apparatus 30 for heating the long sheet W on which the nanofibers are deposited. ), A main control device 60 for controlling the feeding speed of the long sheet, and the like, and a VOC processing device 70 for burning and removing volatile components.
  • the conveying apparatus 10 is located between the feeding roller 11 which throws in the long sheet W, the winding roller 12 which winds the long sheet W, and between the feeding roller 11 and the winding roller 12. Auxiliary rollers 13 and 18 and drive rollers 14, 15, 16 and 17.
  • the input roller 11, the winding roller 12, and the drive rollers 14, 15, 16, and 17 are structured to rotate by a drive motor not shown.
  • the electric field radiating device 20 is mounted to the case 100 via an insulating member 152 and is disposed at one side of the long sheet W at the long side of the collector 150. It is located in the position which faces the collector 150 in the other surface side in the sheet
  • the power supply device 160 for applying a high voltage (for example, 10 kV to 80 kV) between the nozzle block 110, the collector 150, and the nozzle block 110, and the long sheet W are transferred.
  • Auxiliary belt device 170 is provided.
  • the positive electrode of the power supply device 160 is connected to the collector 150, and the negative electrode of the power supply device 160 is connected to the nozzle block 110 through the case 100.
  • the nozzle block 110 has a plurality of nozzles as a plurality of nozzles for discharging the polymer solution upward from the discharge port.
  • the nanofiber manufacturing apparatus 1 discharges the polymer solution from the discharge ports of the plurality of upward nozzles while radiating the polymer solution from the discharge ports of the plurality of upward nozzles, thereby electrospinning the nanofibers, and from the discharge ports of the plurality of upward nozzles. It is comprised so that the overflowed polymer solution can be collect
  • the some upward nozzle 112 is arrange
  • the number of the plurality of upward nozzles 112 is, for example, 36 (6 * 6 when arranged in the same number) and 21904 (148 * 148 when arranged in the same number).
  • the nozzle block having various sizes and various shapes can be used for the field emission device of the present invention, the nozzle block 110 includes, for example, a rectangle (square) of 0.5m to 3m on one side when viewed from the top surface. ) Has a size and shape shown.
  • the auxiliary belt device 170 includes five auxiliary belt rollers that assist the rotation of the auxiliary belt 172 and the auxiliary belt 172 which rotates in synchronization with the feeding speed of the long sheet W.
  • One of the five subbelt rollers 174 or two or more subbelt rollers 174 is a driving roller, and the remaining subbelt rollers are driven rollers. Since the auxiliary belt 172 is disposed between the collector 150 and the long sheet W, the long sheet W is smoothly conveyed without being pulled by the collector 150 to which a positive high voltage is applied. .
  • the heating device 30 is disposed between the field radiating device 20 and the thickness measuring device 40 to heat the long sheet W in which the nanofibers are deposited.
  • the heating temperature varies depending on the type of the long sheet W or the nanofibers, but for example, the long sheet W can be heated to a temperature of 50 ° C to 300 ° C.
  • the thickness measuring device 40 controls the operations of the three thickness measuring units 42 and the three thickness measuring units 42, and simultaneously controls the three thickness measuring units 42.
  • the main body part 41 which has a function which calculates the thickness of a elongate sheet
  • the thickness measuring device 40 transmits the information about the measured thickness to the feed rate control device 50.
  • the feed rate control device 50 controls the feed rate V of the long sheet W when the feed device 10 feeds the long sheet W based on the received information about the corresponding thickness. do.
  • the thickness measuring part 42 is arrange
  • the laser rangefinders 43 and 44 are projected from the laser diode 45, the transmissive lens 46 for transmitting the laser light emitted from the laser diode, and the transmissive lens 46, and the A light receiving lens 47 for receiving the laser light reflected by the surface (one side or the other side), and a light receiving circuit 48 made of a CCD element receiving the laser light received by the light receiving lens 47.
  • the amount of change is changed. by reading it is possible to measure the distance (L 1, L 2).
  • the thickness measuring apparatus 40 is the above-mentioned three thickness measuring parts 42, and is a plurality of different position in the width direction of the long sheet W (in the width direction of a long sheet.
  • the thickness measuring device 40 can transmit the value of the measured thickness d to the feed rate control device 50 as it is, and the average obtained by averaging the thicknesses d measured by the three thickness measuring units 42.
  • the thickness ⁇ d> value can be transmitted to the feed rate control device 50.
  • the feed rate control device 50 is a feed rate V of the long sheet W conveyed by the feed device 10 based on the thickness d or the average thickness ⁇ d> measured by the thickness measuring unit 40. ).
  • the thickness is made thick by increasing the deposition amount of the nanofibers per unit area by slowing the feed rate V. do.
  • the control of the feed rate V can be performed by controlling the rotation speed of the drive rollers 14, 15, 16, 17. FIG.
  • the VOC processing apparatus 70 burns and removes volatile components generated when the nanofibers are deposited on the long sheet.
  • Nanofibers manufacturing method using nanofibers manufacturing apparatus 1 according to Example 1 is described.
  • Example 1 nanofiber manufacturing method concerning Example 1 which manufactures a nanofiber nonwoven fabric using the nanofiber manufacturing apparatus 1 which concerns on Example 1 comprised as mentioned above is demonstrated.
  • FIG. 6 is a graph showing the time variation of the thickness d, the average thickness ⁇ d>, and the feed rate V.
  • FIG. FIG. 6 (a) is a graph showing the time change of the thickness d
  • FIG. 6 (b) is a graph showing the time change of the average thickness ⁇ d>
  • FIG. 6 (c) is the time of the feed rate (V).
  • Figure 6 (a) and 6 (b) wherein reference numeral Do represents a target thickness, and reference numeral D H denotes the thickness of the acceptable upper limit, the reference numeral D L represents the lower limit of acceptable thickness.
  • the code Vo shows the initial value of a feed rate.
  • the nanofiber manufacturing method according to Example 1 is "target thickness setting" "long sheet feeding. Electric field radiation”, “thickness measurement”, “average thickness calculation”, “calculation of deviation ( ⁇ P)” Each process of "feed rate control” is included.
  • the thickness of the nanofiber nonwoven fabric to be produced is set as the target thickness do.
  • Each long electric field W is set in the conveying apparatus 10, and each long electric field W is conveyed from the feeding roller 11 toward the winding roller 12 at the predetermined conveying speed V, In the spinning device 20, nanofibers are sequentially deposited on the elongated sheet (W). Thereafter, the long sheet W having the nanofibers deposited thereon is heated by the heating device 30. As a result, a nanofiber nonwoven fabric made of a long sheet in which nanofibers are deposited is produced.
  • the thickness d of the long sheet W in which the nanofibers were deposited by the electric field radiator 20 was measured and the thickness d measured by the thickness measuring device 40 by the following procedure.
  • the feed rate (V) is controlled based on. In Example 1, as shown in Figs. 6 (a) to 6 (c), the feed rate is not controlled for the period before time t passes, and the period after time t passes. The feed rate is controlled. The same applies to Modifications 1 and 2 described below.
  • the thickness of the elongate sheet W is measured by the three thickness measuring parts 42. As shown in FIG. The thickness measurement by the thickness measurement part 42 is performed every 10 ms, for example. As a result, a graph as shown in Fig. 6A is obtained.
  • the average thickness ⁇ d> is calculated by averaging the thicknesses d measured by the three thickness measuring units 41. As a result, a graph as shown in Fig. 6B is obtained.
  • the feed rate V is controlled based on the deviation amount ⁇ d.
  • the feed rate V is delayed to reduce the nanoparticles per unit area.
  • the thickness is made thicker by increasing the deposition amount of the fiber.
  • the feed rate V is increased to increase the amount of nanofibers deposited per unit area.
  • the thickness is made thin by reducing (see FIG. 6 (c)). Accordingly, after time t passes, the thickness d gradually converges to a predetermined target thickness do value.
  • the long sheet a nonwoven fabric, a woven fabric, a knitted fabric, a film, or the like made of various materials can be used.
  • the thickness of a long sheet the thing of 5um-500um can be used, for example.
  • the length of the long sheet may be, for example, 10 m to 10 km.
  • polylactic acid polypropylene
  • PVAc polyvinyl acetate
  • PET polyethylene terephthalate
  • PBT polyethylene na Phthalate
  • PA Polyamide
  • PUR Polyurethane
  • PVA Polyvinyl Alcohol
  • PAN Polyacrylonitrile
  • PEI Polyethylimide
  • PCL Polycaprolactone
  • PLGA Polylactic acid glyc Rollic acid
  • a solvent used for a polymer solution dichloromethane, dimethylformamide, dimethyl sulfoxide, methyl ethyl ketone, chloroform, acetone, water, formic acid, acetic acid, cyclohexane, THF, etc. can be used, for example. You may mix and use multiple types of solvent.
  • the polymer solution may contain additives such as conductivity improvers.
  • the thickness (d) of the nanofiber nonwoven fabric to be manufactured can be set to 1 micrometer-100 micrometers, for example.
  • the feed speed V can be set, for example, from 0.2 m / min to 100 m / min.
  • the voltage applied to the nozzle, the collector 150, and the nozzle block 110 can be set at 10 kV to 80 kV, and is preferably set at around 50 kV.
  • the temperature of a spinning zone can be set to 25 degreeC, for example.
  • the humidity of the radiation zone can be set to 30%, for example.
  • the thickness measuring apparatus 40 which measures the thickness d of the elongate sheet W which deposited the nanofiber by the spinning apparatus 20, and thickness measurement
  • the thickness d measured by the thickness measuring device 40 is provided by the feed rate control device 50 which controls the feed rate V based on the thickness d measured by the device 40. It becomes possible to control the feed rate V on the basis of. For this reason, even if the radiation conditions fluctuate and the thickness fluctuates during the long-term field emission process, it is possible to stop the variation in the thickness in a predetermined range by appropriately controlling the feed rate accordingly. It becomes possible to mass-produce the nanofiber nonwoven fabric which has.
  • the transfer speed (based on the deviation d? D between the thickness d measured by the thickness measuring device 40 and the predetermined target thickness do)
  • V the transfer speed (based on the deviation d? D between the thickness d measured by the thickness measuring device 40 and the predetermined target thickness do)
  • the control amount change amount from the initial value Vo
  • the deviation amount ⁇ P is increased.
  • the thickness measuring apparatus 40 is three thickness measuring parts arrange
  • the average thickness ⁇ d> obtained by the feed rate control apparatus 50 averages the thickness d measured by the three thickness measuring parts 40. Since it is possible to control the feed rate V on the basis of the above, even if the distribution is in the thickness d in the width direction of the long sheet W, the feed rate (d) is based on the average thickness ⁇ d>. By controlling V), it becomes possible to control the feed rate more appropriately.
  • the heating which arrange
  • the electric field radiating apparatus includes a plurality of electric field radiating apparatuses arranged in series along a predetermined conveying direction a in which the long sheet W is conveyed ( 20), it is possible to sequentially deposit nanofibers on the long sheet W in each of the plurality of electric field radiating devices 20, and further increase the productivity of the nanofiber nonwoven fabric having a uniform thickness. It is possible to mass-produce. Further, even when mass-producing a nanofiber nonwoven fabric in which various kinds of nanofibers are sequentially deposited on the long sheet W, it is possible to mass-produce a nanofiber nonwoven fabric having a uniform thickness with higher productivity.
  • the nanofiber manufacturing apparatus 1 which concerns on Example 1, the nanofiber manufacturing apparatus provided with the field emission value which can manufacture the nanofiber which has extremely thin diameter (a few nm-several thousand nm) as a spinning device. On the other hand, it becomes possible to mass-produce a nanofiber nonwoven fabric having a uniform thickness.
  • the nanofiber is deposited on the elongate sheet W conveyed at the predetermined
  • FIG. 7 is a graph showing the time variation of the thickness d, the average thickness ⁇ d>, and the feed rate V in the modification 1.
  • FIG. 7 (a) is a graph showing the time change of the thickness d
  • FIG. 7 (b) is a graph showing the time change of the average thickness ⁇ d>
  • FIG. 7 (c) is the time of the feed rate (V).
  • Figure 7 (a) and represents a numeral do is the target thickness of the Fig. 7 (b)
  • reference numeral H d denotes a thickness of the acceptable upper limit
  • the code L d represents the lower limit of acceptable thickness.
  • the code Vo shows the initial value of a feed rate.
  • the feed rate V is controlled in a stepped shape.
  • the thickness d and the average thickness ⁇ d are similar to those in the first embodiment. It is possible to converge> to the target thickness do.
  • FIG. 9 is a graph showing the time variation of the thickness d, the average thickness ⁇ d>, and the feed rate V in the second modification.
  • FIG. 9 (a) is a graph showing the time change of the thickness d
  • FIG. 9 (b) is a graph showing the time change of the average thickness ⁇ d>
  • FIG. 9 (c) is the time of the feed rate (V).
  • Graph showing change. 9 (a) and 9 (b) the symbol do indicates the target thickness
  • the symbol d H indicates the upper limit of the allowable thickness
  • the symbol d L indicates the lower limit of the allowable thickness
  • the symbol d H1 indicates the upper side.
  • the control start thickness is shown, and the sign d L1 represents the bottom control start thickness.
  • the symbol Vo represents the initial value of the feed rate.
  • the average thickness ⁇ d> is higher than the upper control start thickness d H1 or lower than the lower control start thickness d L1 .
  • the feed rate V change from the initial value.
  • the thickness d and the average thickness ⁇ d> are set to the target thickness do as in the case of the first embodiment. It is possible to converge.
  • the effect that it becomes possible to reduce the frequency of changing the feed rate V can also be acquired.
  • FIG. 10 is a front view of the nanofiber manufacturing apparatus 2 which concerns on Example 2.
  • FIG. FIG. 11 is a figure for demonstrating the thickness measuring apparatus 40a in Example 2.
  • FIG. 11 (a) is a block diagram showing the relationship between the thickness measuring device 40a, the feed rate control device 50, and the feeding device 10.
  • FIGS. 11 (b) and 11 (c) show the thickness measuring part 42a.
  • 12 is a diagram for explaining an image picked up by the thickness measuring unit 42a.
  • the nanofiber manufacturing method (2) according to Example 2 basically has the same configuration as that of the nanofiber manufacturing apparatus 1 according to Example 1, but the configuration of the thickness measurement apparatus is the nanofiber manufacturing according to Example 1. It is different from the case of the apparatus 1. That is, in the nanofiber manufacturing apparatus 2 which concerns on Example 2, as for thickness measuring apparatus 40a, as shown to FIG. 10 and FIG. 11, the thickness measuring roller along the long sheet W along the circumferential direction Thickness measurement part 42a which consists of a camera which enlarges and photographs the outermost peripheral part of the long sheet W guide
  • the thickness measuring apparatus 40a is a thickness measuring part which measures the thickness d of the long sheet W, and has three different positions (long sheet in the width direction of the long sheet W).
  • the thickness measurement part 42a what combined the digital camera and the high magnification optical microscope can be used.
  • the main body part 41a calculates the thickness d of the long sheet W by image-processing the image image
  • FIG. 12: is a figure for demonstrating the principle which calculates the thickness of the elongate sheet W by the thickness measuring part 42a.
  • 12A is an image when the line S 1 indicating the upper end of the long sheet W is displayed above the target line So
  • FIG. 12B is the upper end of the long sheet W. Is an image in the case where the line S 1 indicating is displayed at the same height position as the target line So, and in FIG. 12C, the line S 1 indicating the upper end of the long sheet W is the target line (S). It is an image when it is displayed below than.
  • the feed rate V is controlled based on the thickness measuring device 40a for measuring the thickness d of the long sheet W on which the fibers are deposited, and the thickness d measured by the thickness measuring device 40a. Since the feed rate control apparatus 50 is provided, it becomes possible to control a feed rate based on the thickness measured by the thickness measuring apparatus. For this reason, as in the case of the nanofiber manufacturing apparatus 1 according to the first embodiment, even if the spinning condition is changed and the thickness is varied in the long-term field spinning process, the amount of variation in the thickness is controlled by controlling the feed rate accordingly. Can be stopped within a predetermined range, and as a result, it becomes possible to mass produce a nanofiber nonwoven fabric having a uniform thickness.
  • the thickness measuring apparatus 40a is three thickness arrange
  • the nanofiber manufacturing apparatus 2 which concerns on Example 2 has a structure similar to the case of the nanofiber manufacturing apparatus 1 which concerns on Example 1 except the structure of the thickness measuring apparatus, it relates to Example 1 It has a corresponding effect among the effects which the nanofiber manufacturing apparatus 1 has.
  • FIG. 13 is a diagram illustrating the operation of the thickness measurement unit 42b in the third embodiment.
  • the curve shown in the sine curve shape in FIG. 13 is a trace which the thickness measurement part 42b encloses the site
  • the nanofiber manufacturing apparatus 3 which concerns on Example 3 has the structure similarly to the nanofiber manufacturing apparatus 1 which concerns on Example 1, the structure of a thickness measuring apparatus is Example 1 It differs from the case of the nanofiber manufacturing apparatus 1 which concerns on this. That is, in the nanofiber manufacturing apparatus 3 which concerns on Example 3, the thickness measuring apparatus 40b (not shown) is the thickness which measures the thickness d of the long sheet W as shown in FIG.
  • the measuring part 42b and the thickness measuring part 42b are provided with the drive part 49 which reciprocates by the predetermined period T along the width direction of the elongate sheet
  • the thickness measuring device 40b measures the thickness d of the long sheet W while reciprocating the thickness measuring unit 42b along the width direction b of the long sheet W.
  • the feed rate control device 50 converts the thickness d measured by the thickness measuring unit 42b into a predetermined period T or a time corresponding to n times the period T (where n is a natural number).
  • the feed rate V is controlled based on the average thickness ⁇ d> obtained by averaging.
  • the nanofiber manufacturing apparatus 3 according to the third embodiment is different from the case of the nanofiber manufacturing apparatus 1 according to the first embodiment, although the configuration of the thickness measuring apparatus is different.
  • the thickness measuring apparatus 40b makes the thickness measuring part 42b reciprocate along the width direction b of the long sheet W, it is long. It becomes possible to measure thickness over the wide area
  • the conveyance speed control apparatus 50 makes the thickness d measured by the thickness measuring part 42 into the predetermined period T or the said period ( Since the feed rate V is controlled on the basis of the average thickness ⁇ d> obtained by averaging for n times of T), the average thickness in any case in the width direction of the long sheet is obtained. By controlling the feed rate on the basis, it becomes possible to control the feed rate more appropriately.
  • the nanofiber manufacturing apparatus 3 which concerns on Example 3 has a structure similar to the case of the nanofiber manufacturing apparatus 1 which concerns on Example 1 except the structure of the thickness measuring apparatus, it relates to the nanofiber which concerns on Example 1 It has a corresponding effect among the effects which the fiber manufacturing apparatus 1 has.
  • the nanofiber production apparatus of the present invention has been described by using a nanofiber production apparatus having four field emission values as an electric field radiator, but the present invention is not limited thereto.
  • the present invention can be applied to a nanofiber manufacturing apparatus having one to three or five or more field emission values.
  • the present invention can be applied to a nanofiber production apparatus using a melt blow spinning device instead of the field spinning value.
  • the nanofiber manufacturing apparatus of the present invention uses a melt blown spinning device, a spanbond spinning device, a needle punch spinning device, and other spinning devices to produce a nonwoven fabric on a long sheet, and further to deposit nanofibers. In the case of controlling the feed rate on the basis of the thickness, it can be suitably used.
  • the nanofiber manufacturing apparatus of this invention was demonstrated using the upward field emission value which has an upward nozzle, this invention is not limited to this.
  • the present invention can be applied to a top-down field emission device having a downward nozzle or a nanofiber production device having a side field emission device having a side nozzle.
  • the positive electrode of the power supply device 160 is connected to the collector 150, and the negative electrode of the power supply device 160 is connected to the nozzle block 110.
  • the nanofiber manufacturing apparatus was demonstrated, this invention is not limited to this.
  • the present invention can be applied to a nanofiber production apparatus having an electric field emission value in which a positive electrode of a power supply device is connected to a nozzle and a negative electrode of the power supply device is connected to a collector.
  • Example 1 Although the nanofiber manufacturing apparatus of this invention was demonstrated using the nanofiber manufacturing apparatus provided with three thickness measuring parts as an example, this invention is not limited to this.
  • the present invention may be applied to a nanofiber manufacturing apparatus having one, two, or four or more thickness measurement units.
  • the nanofiber manufacturing apparatus of the present invention is, of course, mass production of nanofiber nonwoven fabric having a uniform thickness by depositing nanofibers having a uniform thickness on a long sheet having a uniform thickness.
  • nanofibers having a thickness according to the long sheet having a non-uniform thickness it can be suitably used even when mass-producing a nanofiber nonwoven fabric having a uniform thickness as a whole.
  • the present invention has been described using a nanofiber production apparatus in which one nozzle block is disposed in one electric field radiator, but the present invention is not limited thereto.
  • 14 is an enlarged view illustrating main parts of the field radiating device 20a.
  • the present invention may be applied to a nanofiber manufacturing apparatus in which two nozzle blocks 110a1 and 110a2 are disposed in one field radiator 20a, and two or more nozzle blocks.
  • the present invention can also be applied to this excreted nanofiber manufacturing apparatus.
  • the nozzle arrangement pitch may be the same with all nozzle blocks, and the nozzle arrangement pitch may be different with each nozzle block.
  • the height position of the nozzle block may be the same for all the nozzle blocks, or the height position of the nozzle block may be different for each nozzle block.
  • a mechanism for reciprocating the nozzle block at a predetermined reciprocating cycle along the width direction of the long sheet may be provided.
  • the mechanism By using the mechanism, electric field spinning is performed while reciprocating the nozzle block at a predetermined reciprocating cycle, so that the deposition amount of the polymer fibers along the width direction of the long sheet can be made uniform.
  • the reciprocating cycle and the reciprocating distance of the nozzle block may be independently controlled for each field radiating device or for each nozzle block. With such a configuration, it is possible to reciprocate all the nozzle blocks at the same period, and to reciprocate each nozzle block at different periods. Further, the reciprocating distance of the reciprocating motion may be the same with all the nozzle blocks, or the reciprocating distance of the reciprocating motion with each nozzle block may be different.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Nanotechnology (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Manufacturing & Machinery (AREA)
  • Composite Materials (AREA)
  • Materials Engineering (AREA)
  • Nonwoven Fabrics (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)

Abstract

L'invention concerne un dispositif et un procédé pour la fabrication de nanofibres, qui permettent de fabriquer à grande échelle un non-tissé de nanofibres d'épaisseur uniforme. Ce dispositif (1) pour la fabrication de nanofibres comporte: un dispositif de transfert (10), qui sert à transférer une longue feuille (W) à une vitesse de transfert (V) prédéterminée; un dispositif (20) à émission de champ, pour accumuler des nanofibres sur les longues feuilles (W) transférées par le dispositif de transfert (10); un dispositif (40) de mesure de l'épaisseur, pour mesurer l'épaisseur (d) des longues feuilles (W) sur lesquelles le dispositif (20) à émission de champ a accumulé des nanofibres; et un dispositif de commande (50) de la vitesse de transfert, pour régler la vitesse de transfert (V) sur la base de l'épaisseur (d) mesurée par le dispositif (40) de mesure de l'épaisseur.
PCT/KR2011/003065 2010-12-06 2011-04-27 Procédé et dispositif pour la fabrication de nanofibres WO2012077873A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2010-272079 2010-12-06
JP2010272079A JP2012122155A (ja) 2010-12-06 2010-12-06 ナノ繊維製造装置及びナノ繊維製造方法
KR1020110017377A KR101040064B1 (ko) 2010-12-06 2011-02-25 나노섬유 제조장치 및 나노섬유 제조방법
KR10-2011-0017377 2011-02-25

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KR101466291B1 (ko) * 2013-04-17 2014-12-01 (주)에프티이앤이 제어 시스템이 구비된 전기방사장치
JP5938728B2 (ja) * 2013-05-15 2016-06-22 パナソニックＩｐマネジメント株式会社 シート製造装置、目付測定装置、および、目付測定方法
JP5938729B2 (ja) * 2013-05-24 2016-06-22 パナソニックＩｐマネジメント株式会社 シート製造装置、繊維径測定装置、および、繊維径測定方法
KR101635024B1 (ko) * 2014-08-13 2016-06-30 박종철 용매 잔존량이 낮은 나노섬유 및 이의 제조방법
KR101622054B1 (ko) 2014-12-31 2016-05-17 (재)한국섬유기계연구원 전기방사 기법을 활용한 입체형상 나노섬유 제조장치 및 그 방법
NL2016652B1 (en) * 2016-04-21 2017-11-16 Innovative Mechanical Engineering Tech B V Electrospinning device and method.
JP7514085B2 (ja) 2020-02-28 2024-07-10 花王株式会社 繊維シートの製造装置及び製造方法
KR102503345B1 (ko) * 2021-03-10 2023-02-23 부산대학교 산학협력단 두께 균일성 향상을 위한 실시간 평가 수단이 구비된 나노섬유필터 제조 장치

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