US20160060790A1 - Electrospinning apparatus - Google Patents

Electrospinning apparatus Download PDF

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Publication number
US20160060790A1
US20160060790A1 US14/784,752 US201414784752A US2016060790A1 US 20160060790 A1 US20160060790 A1 US 20160060790A1 US 201414784752 A US201414784752 A US 201414784752A US 2016060790 A1 US2016060790 A1 US 2016060790A1
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United States
Prior art keywords
elongated sheet
unit
nozzle block
auxiliary belt
nanofiber
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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.)
Abandoned
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US14/784,752
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English (en)
Inventor
Jong-Chul Park
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.)
Lime Co Ltd
Original Assignee
Finetex Ene Inc
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Filing date
Publication date
Priority claimed from KR1020130042247A external-priority patent/KR101382572B1/ko
Priority claimed from KR1020130042252A external-priority patent/KR101382575B1/ko
Priority claimed from KR1020130042250A external-priority patent/KR101466291B1/ko
Priority claimed from KR20130042253A external-priority patent/KR101479751B1/ko
Priority claimed from KR1020130042248A external-priority patent/KR101517984B1/ko
Application filed by Finetex Ene Inc filed Critical Finetex Ene Inc
Assigned to FINETEX ENE, INC. reassignment FINETEX ENE, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: PARK, JONG-CHUL
Publication of US20160060790A1 publication Critical patent/US20160060790A1/en
Abandoned legal-status Critical Current

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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
    • D01D5/0007—Electro-spinning
    • D01D5/0061—Electro-spinning characterised by the electro-spinning apparatus
    • 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
    • D01D13/00—Complete machines for producing artificial threads

Definitions

  • the present invention relates to electrospinning apparatus capable of: sensing a sagging of an elongated sheet which carries electrospinned polymer spinning solution so as to adjust the carrying speed and time of the elongated sheet, assisting carrying of the sheet, controlling the carrying speed, discharging amount of a nozzle block, and voltage intensity, thereby mass-producing of nanofiber having uniform air permeability and uniform thickness.
  • Nano Fiber refers to a Micro Fiber having an average diameter of tens to hundreds nm
  • products including nanofiber such as non-woven fabric, membrane, and braid are widely used as consumer goods, agricultural, clothing, and industrial ways.
  • nanofiber is used in various fields such as artificial leather, suedette, sanitary pads, clothing, diapers, packing materials, general goods materials, various filter materials, medical use materials in gene transporting, bulletproof jacket, and other national defense use materials.
  • nanofiber is produced by electric field.
  • nanofiber applies polymer substance which is raw material to high voltage electric field occurring electric repulsive force inside polymer substance, so molecular agglomerate, split into nano size thread, and nanofiber is manufactured and produced.
  • polymer substance can be thinly torn, 10 to 1000 nm thickness of nanofiber can be acquired.
  • Nanofiber manufacturing method comprising the structure stated above is disclosed in U.S. Pat. No. 4,044,404. Also, The electrospinning apparatus made up of the structure as described above is illustrated in FIG. 1 , comprising a spinning solution main tank (not shown) filled spinning solution, a metering pump (not shown) which is for the required amount of supply on polymer spinning solution inside the spinning solution main tank, a nozzle block ( 111 ) discharging polymer spinning solution inside the spinning solution main tank, and arranged and installed several nozzles ( 112 ) in pin form, and a collector ( 113 ) located above the nozzle ( 112 ) to integrate jetted polymer spinning solution and has predetermined space separated from the nozzle ( 112 ), and a unit ( 110 ) including a power supply device ( 114 ) generated high voltage at the collector ( 113 ).
  • Nanofiber manufacturing method by the electrospinning apparatus ( 100 ) includes the step of: consecutively supplying the required amount of spinning solution by metering pump from the spinning solution main tank into several nozzles ( 112 ) provided high voltage, forming a nanofiber web by spinning and aggregating the spinning solution supplied through several nozzles ( 112 ) on the collector with high voltage, forming nanofiber web on the elongated sheet ( 115 ) carried through the electrospinning apparatus's ( 100 ) units ( 110 ), the elongated sheet which laminating formed the nanofiber web passes through each unit ( 110 ), repeatedly laminating the nanofiber web and producing non-woven fiber by laminating, embossing, or needle punch.
  • the electrospinning apparatus is divided into a bottom-up electrospinning apparatus, a top-down electrospinning apparatus, and a parallel electrospinning apparatus by the located direction on a collector.
  • the electrospinning apparatus is divided into a bottom-up electrospinning apparatus which includes a collector located over a nozzle and can produce equal and relatively thin nanofiber, a top-down electrospinning apparatus which includes a collector located below the nozzle, produces relatively thick nanofiber, and can increase the production of nanofiber per hour, and a parallel electrospinning apparatus which comprises nozzles and collector arranged in parallel direction.
  • the electrospinning apparatus comprises composition of jetting spinning solution by a nozzle block's nozzle, and jetted spinning solution laminates on upper side or lower side of a member forming a nanofiber web.
  • the electrospinning apparatus inside which one unit jets spinning solution by a nozzle, carrying the elongated sheet which laminating forms a nanofiber web to the inside of a different unit, the elongated sheet which is carried to the inside of a different unit jets spinning solution by the nozzle and again laminating forming a nanofiber web, by repeatedly performing the process produces a nanofiber web.
  • each of the unit in the case carrying speed of the elongated sheet on which a nanofiber web is laminated and formed is different according to each section, there are problems such as the elongated sheet is wrinkled, or slacked, etc.
  • an auxiliary carrying device which comprising an auxiliary belt assisting an elongated sheet carrying between a collector with high voltage and a nozzle block.
  • a driving device which directs the electrospinning apparatus but also separate driving device should be installed in addition. Therefore, there are problems such as the process is complex and the cost is increased.
  • Japanese laid-open Patent Publication No. 2011-33229 discloses a method of assessing slaking of an elongated sheet by sending compressed air to a elongated sheet.
  • air pollutant attaches to an air outlet opening sending compressed air, diameter of a hole is changed, measurement error occurs.
  • Korean laid-open Patent Publication No. 2010-0123820 discloses technology of assessing a sheet slacking by pressing and putting a touch roller on the surface of an elongated sheet, and measuring displacement of a touch roller in order to sense slacking of carrying elongated sheet.
  • an elongated sheet tension is evaluated using a contact roller, there are problems such as pollution and modification of nanofiber property of matter as according to electro spinning direction, spin nanofiber contacts a roller.
  • factors determining nanofiber feature are matter feature such as spinning material concentration, dielectric property, and surface tension, and control parameter such as distance between a nozzle and a collector, voltage between a nozzle and a collector, charge density of electrical field, electrostatic pressure in a nozzle, and injection speed of spinning material.
  • matter feature such as spinning material concentration, dielectric property, and surface tension
  • control parameter such as distance between a nozzle and a collector, voltage between a nozzle and a collector, charge density of electrical field, electrostatic pressure in a nozzle, and injection speed of spinning material.
  • buffer section is formed between the electrospinning apparatus each of the unit.
  • an adjusting roller which is movable between upper and lower side in buffer section, carrying speed and carrying time of an elongated sheet going through each unit could be adjustable according to section, and the crumpling, sagging, snapping, breakage, and damage of the elongated sheet are prevented.
  • electrospinning solve the elongated sheet not smoothly carrying problem occurred due to electrostatic attraction, and allocate device sensing slacking of the elongated sheet near spinning zone.
  • the electrospinning apparatus aims to produce nanofiber with uniform quality.
  • an auxiliary belt assisting carrying of the elongated sheet eliminates separate driving device, and instead supported by a roller having low friction coefficient.
  • the auxiliary belt could be rotated only with driving force of conventionally installed elongated sheet carrying roller, and by solving the elongated sheet carrying problem, mass-producing of nanofiber with uniform quality is possible without auxiliary power.
  • auxiliary carrying device is allocated in spinning zone, and roller with low friction coefficient is used to comprise an auxiliary carrying device, it aims to provide an electrospinning apparatus which can carry an elongated sheet without separate driving device.
  • V carrying speed
  • V carrying speed
  • V carrying speed
  • V carrying speed
  • the electrospinning apparatus which can mass-produce nanofiber with uniform air permeability and thickness by controlling discharge amount jetted from a nozzle block and the number of nozzle.
  • the present invention is the electrospinning apparatus for manufacturing nanofiber by jetting spinning solution on the elongated sheet on the collector in each of the unit through nozzle, comprising one or more in series arranged unit; provided in unit, a case comprising electric conductor or non-conductor; provided in the case, a nozzle block which arranges a plurality of nozzles in pin form; a collector collecting spun and jetted polymer spinning solution which is located and installed over the nozzle block with a predetermined distance apart; a voltage generating device which connects ⁇ terminal to the nozzle block and + (plus) terminal to the collector; an elongated sheet located between the nozzle block and the collector, moves in desired speed, and polymer spinning solution nanofiber discharged from the nozzle block is stacked and laminated on; an auxiliary belt which moves the elongated sheet in desired carrying speed; and an auxiliary belt roller which supports and simultaneously operates the auxiliary belt, and further comprising buffer section formed between each of the unit, a pair of support roller supporting the auxiliary belt, and further compris
  • elongated sheet carrying speed adjusting system further comprises a sensing sensor for sensing carrying speed of the elongated sheet inside each of the unit, and a main control device which controls an adjusting roller movement according to sensed elongated sheet carrying speed in each unit.
  • carrying speed is sensed by the sensing sensor, in the case carrying speed of the elongated sheet located in the unit of front-end is faster than carrying speed of the elongated sheet located in the unit of rear-end of the unit, the main control device moves the adjusting roller provided between a pair of the support roller to lower side, carrying speed of the elongated speed located in the unit of front-end and the carrying speed of the elongated sheet located in the unit of rear-end are modified and controlled to the same level.
  • carrying speed is sensed by the sensing sensor, in the case by the sensing sensor carrying speed of the elongated sheet located in the unit of front-end is slower than carrying speed of the elongated sheet located in the unit of rear-end, the main control device moves the adjusting roller provided between a pair of the support roller to upper side, carrying speed of the elongated speed located in the unit of front-end and the carrying speed of the elongated sheet located in the unit of rear-end are modified and controlled to the same level.
  • the electrospinning apparatus comprising one or more in series arranged unit; provided in unit, a case comprising electric conductor or non-conductor; provided in the case, a nozzle block which arranges a plurality of nozzles in pin form; a collector collecting spun and jetted polymer spinning solution which is located and installed over the nozzle block with a predetermined distance apart; a voltage generating device which connects ⁇ terminal to the nozzle block and + terminal to the collector; an elongated sheet located between the nozzle block and the collector, moves in desired speed, and polymer spinning solution nanofiber discharged from the nozzle block is stacked and laminated on; an auxiliary belt which moves the elongated sheet in desired carrying speed; and an auxiliary belt roller which supports and simultaneously operates the auxiliary belt, the auxiliary belt roller comprises a roller with low friction coefficient, and without separate driving device, assists carrying of the elongated sheet.
  • one or more auxiliary belt roller is provided.
  • the auxiliary belt roller comprises one among low friction coefficient rolling bearing, oil bearing, ball bearing, roller bearing, sliding bearing, sleeve bearing, hydrodynamic journal bearing, hydrostatic journal bearing, pneumatic bearing, air dynamic bearing, air static bearing, or air bearing.
  • the electrospinning apparatus comprising one or more in series arranged unit; provided in unit, a case comprising electric conductor or non-conductor; provided in the case, a nozzle block which arranges a plurality of nozzles in pin form; a collector collecting spun and jetted polymer spinning solution which is located and installed over the nozzle block with a predetermined distance apart; a voltage generating device which connects ⁇ terminal to the nozzle block and + terminal to the collector; an elongated sheet located between the nozzle block and the collector, moves in desired speed, and polymer spinning solution nanofiber discharged from the nozzle block is stacked and laminated; an auxiliary belt which moves the elongated sheet in desired carrying speed; and an auxiliary belt roller which supports and simultaneously operates the auxiliary belt, further comprising a sheet slacking sensing device which senses slacking of the elongated sheet in front and rear side of each unit; and an auxiliary belt driving device which receives signal from the auxiliary belt driving device and controls the speed of the auxiliary belt
  • the sheet slacking sensing device is among one of optic sensor, ultrasonic sensor, image sensor, or tension meter.
  • the auxiliary belt driving device is motor.
  • the electrospinning apparatus comprising one or more in series arranged unit; provided in unit, a case comprising electric conductor or non-conductor; provided in case, a nozzle block which arranges a plurality of nozzles in pin form; a collector collecting spun and jetted polymer spinning solution which is located and installed over the nozzle block with a predetermined distance apart; and spins and jets; a voltage generating device which connects ⁇ terminal to the nozzle block and + terminal to the collector; an elongated sheet located between the nozzle block and the collector, moves in desired speed, and polymer spinning solution nanofiber discharged from the nozzle block is stacked and laminated; an auxiliary belt which moves the elongated sheet in desired carrying speed; and an auxiliary belt roller which supports and simultaneously operates the auxiliary belt, further comprising a sheet slacking sensing device which senses slacking of the elongated sheet in front and rear side of each of the unit.
  • the sheet slacking sensing device is among one of optic sensor, ultrasonic sensor, image sensor, or tension meter.
  • the auxiliary belt driving device is motor.
  • the electrospinning apparatus comprising one or more in series arranged unit; provided in unit, a case comprising electric conductor or non-conductor; provided in the case, a nozzle block which arranges a plurality of nozzles in pin form; a collector collecting spun and jetted polymer spinning solution which is located and installed over the nozzle block with a predetermined distance apart; a voltage generating device which connects ⁇ terminal to the nozzle block and + terminal to the collector; an elongated sheet located between the nozzle block and the collector, moves in desired speed, and polymer spinning solution nanofiber discharged from the nozzle block is stacked and laminated; an auxiliary belt which moves the elongated sheet in desired carrying speed; and an auxiliary belt roller which supports and simultaneously operates the auxiliary belt, further comprising air permeability measuring device for measuring permeability of nanofiber laminating formed on the elongated sheet in each unit, carrying speed of the elongated sheet which nanofiber is laminated and formed is controlled, or the nozzle block discharge amount is controlled,
  • the elongated sheet carrying speed control or the nozzle block discharge amount control or the voltage generating device voltage control is based on deviation between air permeability measured from the permeability measuring device and desired goal permeability
  • the air permeability measuring device measures air permeability of nanofiber laminating forming on the elongated sheet by ultrasonic wave.
  • the electrospinning apparatus comprising one or more in series arranged unit; provided in unit, a case comprising electric conductor or non-conductor; provided in the case, a nozzle block which arranges a plurality of nozzles in pin form; a collector collecting spun and jetted polymer spinning solution which is located and installed over the nozzle block with a predetermined distance apart; a voltage generating device which connects ⁇ terminal to the nozzle block and + terminal to the collector; an elongated sheet located between the nozzle block and the collector, moves in desired speed, and polymer spinning solution nanofiber discharged from the nozzle block is stacked and laminated; an auxiliary belt which moves the elongated sheet in desired carrying speed; and an auxiliary belt roller which supports and simultaneously operates the auxiliary belt, further comprising a thickness measurement device for measuring thickness of nanofiber laminating forming on the elongated sheet in each unit, carrying speed of the elongated sheet laminating forming nanofiber is controlled, or the nozzle block discharge amount is controlled, or voltage from the
  • the elongated sheet carrying speed control or the nozzle block discharge amount control or the voltage generating device voltage control is based on deviation between thickness measured from the thickness measurement device and desired goal thickness.
  • the thickness measurement device measures thickness of nanofiber laminating forming on the elongated sheet by measuring longitudinal wave and transverse wave of ultrasound.
  • the present invention having the structure as explained above, could adjust carrying speed and carrying time of the elongated sheet going through each unit, because of this, it can prevent the crimpling, sagging, snapping, breakage, and damage of the elongated sheet carried from each unit.
  • the carrying speed of the elongated sheet in the unit of front end and that of rear-end unit could respectively be adjusted and controlled, not only variously adjust thickness of the nanofiber web laminated on the elongated sheet but also form uniform distribution of nanofiber web laminated on upper side of the elongated sheet.
  • nanofiber web matter could be improved, device operation convenience and nanofiber web product reliability could be enhanced. Even more, by automatically sensing and solving of the slacking of the elongated sheet, uniformity spinning of nanofiber due to the elongated sheet carrying problem is prevented, and thereby high quality nanofiber with uniform matter can be manufactured.
  • the present invention solves the problem of slowed carry of the elongated sheet caused by attaching to the collector, it prevents lack of uniformity spinning of nanofiber due to the elongated sheet carry imbalance, moves the auxiliary belt in upper and lower direction, adjusts the distance with the spinning nozzle, effectively controls nanofiber stack amount, and manufactures high quality nanofiber with uniform matter. Moreover, based on permeability and thickness measured by the permeability measuring device and the thickness measurement device, enables to control the elongated sheet carrying speed and the nozzle block, and enables mass-producing of nanofiber having uniform permeability and thickness during long time electro spinning.
  • FIG. 1 is a drawing schematically illustrating an electrospinning apparatus according to the related art
  • FIG. 2 is a drawing schematically depicting an elongated sheet carrying speed adjusting system according to the first exemplary embodiment of the present invention
  • FIG. 3 and FIG. 4 are drawings schematically showing the elongated sheet carrying speed adjusting system operation process, in the case carrying speed of the elongated sheet located at the unit of the front end is faster than the elongated sheet located at the unit of the rear end according to the first exemplary embodiment of the present invention
  • FIG. 5 and FIG. 6 are drawings schematically showing the elongated sheet carrying speed adjusting system operation process, in the case carrying speed of the elongated sheet located at the unit of front end is slower than the elongated sheet located at the unit of the rear end according to the first exemplary embodiment of the present invention
  • FIG. 7 is a drawing schematically depicting an auxiliary belt device comprising an auxiliary belt roller with low friction coefficient according to the second exemplary embodiment of the present invention
  • FIG. 8 is a drawing schematically showing three auxiliary belt rollers in an auxiliary belt device comprising an auxiliary belt roller with low friction coefficient according to the second exemplary embodiment of the present invention
  • FIG. 9 is a drawing schematically depicting four auxiliary belt rollers in an auxiliary belt device comprising an auxiliary belt roller with low friction coefficient according to the second exemplary embodiment of the present invention.
  • FIG. 10 is a drawing schematically depicting five auxiliary belt rollers in an auxiliary belt device comprising an auxiliary belt roller with low friction coefficient according to the second exemplary embodiment of the present invention
  • FIG. 11 is a drawing schematically showing bearing included in an auxiliary belt roller with low friction coefficient according to the second exemplary embodiment of the present invention.
  • FIG. 12 is a drawing schematically illustrating an elongated sheet slacking sensing device in an auxiliary belt device having three auxiliary belt rollers according to the third exemplary embodiment of the present invention
  • FIG. 13 is a drawing schematically depicting an elongated sheet slacking sensing device in an auxiliary belt device having five auxiliary belt rollers according to the third exemplary embodiment of the present invention
  • FIG. 14 is a drawing schematically showing the elongated sheet slacking sensing device provided with the electrospinning apparatus according to the third exemplary embodiment of the present invention.
  • FIG. 15 is a process schematic diagram schematically showing the third exemplary embodiment of the present invention.
  • FIG. 16 is a process schematic diagram schematically showing the fourth embodiment of the electrospinning apparatus.
  • FIG. 17 is a schematic diagram schematically illustrating a nozzle block of the electrospinning apparatus according to the fourth embodiment of the electrospinning apparatus.
  • FIG. 18 is a process schematic diagram schematically showing the fifth embodiment of the electrospinning apparatus.
  • FIG. 2 is a drawing schematically depicting an elongated sheet carrying speed adjusting system
  • FIG. 3 and FIG. 4 are drawings schematically showing the elongated sheet carrying speed adjusting system operation process, in the case of carrying speed of the elongated sheet located at the unit of front-end is faster than the elongated sheet located at the unit of rear-end
  • FIG. 5 and FIG. 6 are drawings schematically showing the elongated sheet carrying speed adjusting system operation process, in the case of carrying speed of the elongated sheet located at the unit of front-end is slower than the elongated sheet located at the unit of rear-end
  • FIG. 7 is a drawing schematically depicting an auxiliary belt device comprising an auxiliary belt roller with low friction coefficient
  • FIG. 8 is a drawing schematically showing three auxiliary belt rollers in an auxiliary belt device comprising an auxiliary belt roller with low friction coefficient
  • FIG. 9 is a drawing schematically depicting four auxiliary belt rollers in an auxiliary belt device comprising an auxiliary belt roller with low friction coefficient
  • FIG. 10 is a drawing schematically depicting five auxiliary belt rollers in an auxiliary belt device comprising an auxiliary belt roller with low friction coefficient
  • FIG. 11 is a drawing schematically showing bearing included in an auxiliary belt roller with low friction coefficient
  • FIG. 12 is a drawing schematically illustrating an elongated sheet slacking sensing device in an auxiliary belt device having three auxiliary belt rollers
  • FIG. 13 is a drawing schematically depicting an elongated sheet slacking sensing device in an auxiliary belt device having five auxiliary belt rollers
  • FIG. 14 is a drawing schematically showing the elongated sheet slacking sensing device provided with the electrospinning apparatus
  • FIG. 15 is a process schematic diagram schematically showing the embodiment of the electrospinning apparatus
  • FIG. 16 is a process schematic diagram schematically showing the fourth embodiment of the electrospinning apparatus
  • FIG. 17 is a schematic diagram schematically illustrating a nozzle block of the electrospinning apparatus
  • FIG. 18 is a process schematic diagram schematically showing the fifth embodiment of the electrospinning apparatus.
  • the electrospinning apparatus ( 1 ) according to the present invention of the first embodiment comprises the elongated sheet carrying speed adjusting system ( 30 ) which is installed in the electrospinning apparatus ( 1 ), adjusts and controls the carrying speed and carrying time of the elongated sheet ( 15 , 15 ′) carried from each of the unit ( 10 , 10 ′) according to each of the unit ( 10 , 10 ′)
  • the electrospinning apparatus ( 1 ) comprises a spinning solution main tank (not shown) which fills spinning solution inside, a metering pump (not shown) to supply the required amount of polymer spinning solution filled in the spinning solution main tank, a nozzle block ( 11 ) having plurality of pin type formed nozzles ( 12 ) to discharge polymer spinning solution inside the spinning solution main tank, a collector ( 13 ) which is installed separately in predetermined space from the nozzle ( 12 ) to collect spinning solution jetted from the nozzle bock ( 11 )'s nozzle ( 12 ) and a unit ( 10 ) containing inside a power supply device ( 14 ) which generates voltage to the collector ( 13 ).
  • spinning solution supplied through the nozzle ( 12 ) inside the unit ( 10 ) is composed of solute and solvent, for solute is polymer including siloxane alone or combination of siloxane and selected coupler among monomethacrylate, vinyl, hydride, distearate, bis(1,2-hydroxymethyl), methoxy, ethoxylate, propoxylate, diglycidyl ether, monoglycidyl ether, monohydroxyalkyl, bishydroxyalkyl, chlorine and bis((aminoethyl-aminopropyl)dimethoxysilyl)ether.
  • solute is polymer including siloxane alone or combination of siloxane and selected coupler among monomethacrylate, vinyl, hydride, distearate, bis(1,2-hydroxymethyl), methoxy, ethoxylate, propoxylate, diglycidyl ether, monoglycidyl ether, monohydroxyalkyl, bishydroxyalkyl, chlorine and bis((aminoethyl-amin
  • polyvinylidene fluoride polyvinylidene fluoride-hexafluoropropylene copolymer, composite composition thereof, polyamide, polyimide, polyamideimide, poly(meta-phenylene isophthalamide), meta-aramid, poly Ethylene ChloroTriFluoroEthylene, polyChloroTriFluoroEthylene, Poly(methyl methacrylate), polyacrylonitrile, polyvinylidene chloride-acrylonitrile copolymer and polyacrylamide.
  • Solvent is preferably composed of one or more among phenol, formic acid, sulfuric acid, m-cresol, trifluoroacetic anhydride/dichloromethane, water, N-methylmorpholine N-oxide, chloroform, tetrahydrofuran, and an aliphatic ketone group such as methyl isobutyl ketone and methyl ethyl ketone, an aliphatic hydroxyl group such as m-butyl alcohol, isobutyl alcohol, methyl alcohol and ethanol, an aliphatic compound group such as hexane, tetrachloroethylene and acetone, a glycol group such as propylene glycol, a diethylene glycol and ethylene glycol, a halogen compound group such as trichloroethylene and dichloromethane, an aromatic compound group such as toluene and xylene, an alicyclic compound group such as cyclohexanone, cyclohexane
  • the electrospinning apparatus ( 1 ) by the structure according to the first exemplary embodiment of the present invention, fixed amount of spinning solution filled in the spinning solution main tank inside the unit ( 10 ) is consecutively provided in the several nozzles ( 12 ) provided with high voltage through a metering pump, polymer's spinning solution is provided by the nozzle ( 12 ) spins and collects on the collector ( 13 ) with high voltage flowing through the nozzle ( 12 ) and nanofiber web (not shown) is formed, formed nanofiber web is laminating and produced to non-woven fabric, filter, etc.
  • collector ( 13 ) is provided with the elongated sheet ( 15 ) for preventing sagging and carrying a nanofiber web which is formed on the collector ( 13 ) when jetting spinning solution, the elongated sheet ( 15 ) is wound by the supply roller ( 3 ) which is provided on the one side of an electrospinning apparatus and the winding roller ( 5 ) provided on the other end.
  • polymer spinning solution is jetted on the elongated sheet ( 15 ) located on the collector ( 13 ) through the electrospinning apparatus ( 1 ) nozzle ( 12 ) and comprised forming a nanofiber web
  • seperate supporter (not shown) is supplied on the elongated sheet ( 15 )
  • separate supply roller (not shown) is provided for providing the supporter
  • the nozzle ( 12 ) spinning solution is jetted on the supporter to form a nanofiber web.
  • the supporter laminating polymer spinning solution which is jetted from the electrospinning apparatus ( 1 ) the nozzle ( 12 ) is preferably comprising non-woven fabric or fabric etc, but it is not limited to this.
  • the collector ( 13 ) outer side is provided with the auxiliary belt ( 16 ), the collector ( 13 ) both ends in the direction of length are each provided with a carrying roller ( 17 ), the auxiliary belt ( 16 ) is driven by the carrying roller's ( 17 ) rotation, by driving of the auxiliary belt ( 16 ) the elongated sheet ( 15 ) is carried from the front of the electrospinning apparatus ( 1 ) to the rear.
  • spinning solution filled in the inside of the electrospinning apparatus ( 1 ) unit's spinning solution main tank is jetted on the collector's ( 13 ) elongated sheet ( 15 ) by the nozzle ( 12 ), nanofiber web is formed as spinning solution jetted on the elongated sheet ( 15 ) is laminated, the elongated sheet ( 15 ) is carried by the auxiliary belt ( 16 ) driving by the carrying roller ( 17 ) rotation provided with on both ends of the collector ( 13 ) and located inside another unit ( 10 ′), by repeatedly performing the process a final production is produced.
  • the nozzle block's ( 11 ) nozzle's ( 12 ) outlet is formed in the upward direction
  • the collector ( 13 ) is located in the upper side of the nozzle block ( 11 ) and spins spinning solution in the upward direction.
  • the electrospinning apparatus ( 1 ) is composed of a bottom-up electrospinning apparatus which spins spinning solution in the upward direction, but it is also possible to comprise a top-down electrospinning apparatus which spins spinning solution in the downward direction.
  • the elongated sheet carrying speed adjusting system ( 30 ) comprises a buffer section ( 31 ) formed between each of the unit ( 10 , 10 ′) of the electrospinning apparatus ( 1 ), a pair of support roller ( 33 , 33 ′) which supports the elongated sheet ( 15 ) provided on the buffer section ( 31 ), and an adjusting roller ( 35 ) provided between the pair of the support roller ( 33 , 33 ′)
  • the support roller ( 33 , 33 ′) supports carrying of the elongated sheet ( 15 ) when carrying the elongated sheet ( 15 ) on which a nanofiber web is laminated and formed by nozzle jetted spinning solution in each of the unit ( 10 , 10 ′), each of them is provided in front-end and rear-end of the buffer section ( 31 ) formed between each of the unit ( 10 , 10 ′).
  • the adjusting roller ( 35 ) is provided between a pair of the support roller ( 33 , 33 ′), the elongated sheet ( 15 ) is winding, by the adjusting roller ( 35 ) upper, lower movement, the carrying speed and carrying time of the elongated sheet ( 15 a , 15 b ) according to each of the unit ( 10 , 10 ′) are adjusted.
  • a sensing sensor (not shown) for sensing the elongated sheet ( 15 a , 15 b ) carrying speed in each of the unit ( 10 , 10 ′) is provided, and the main control device ( 50 ) is provided as illustrated in FIG. 16 in order to control the adjusting roller ( 35 ) movement according to carrying speed of the elongated sheet ( 15 a , 15 b ) in each of the unit ( 10 , 10 ′) sensed by the sensing sensor.
  • carrying speed of the elongated sheet ( 15 a , 15 b ) in each of the unit ( 10 , 10 ′) is sensed, according to the sensed carrying speed of the elongated sheet ( 15 a , 15 b ), the main control device ( 50 ) controls the adjusting roller ( 35 ) movement, in order to carry the elongated sheet ( 15 a , 15 b ), an auxiliary belt ( 16 ) provided on one side of the collector ( 13 ), or a carrying roller ( 17 ) for driving the auxiliary belt ( 16 ), or a motor (not shown) driving speed is sensed, and according to this, it is possible to comprise the main control device ( 50 ) controlling the movement of the adjusting roller ( 35 ).
  • the main control device ( 50 ) moves the adjusting roller ( 35 ) provided between a pair of the support roller ( 33 , 33 ′) to lower side, carrying speed of the elongated speed ( 15 a ) located in the unit of front end ( 10 ) and the carrying speed of the elongated sheet ( 15 b ) located in the unit of rear-end ( 10 ′) are modified and controlled to the same level.
  • the adjusting roller ( 35 ), provided between a pair of the support roller ( 33 , 33 ′) and wind the elongated sheet is moved to the lower side, among the elongated sheet ( 15 ) carried from the unit ( 10 ) located in front-end to the unit ( 10 ′) located in rear-end, the elongated sheet ( 15 a ), carried to outer side of the unit ( 10 ) in front-end and excessively carried to the buffer section ( 31 ) located between each of the unit, is pulled, carrying speed of the elongated speed located in front-end of the unit and the carrying speed of the
  • the main control device ( 50 ) moves the adjusting roller ( 35 ) provided between a pair of the support roller ( 33 , 33 ′) to upper side, carrying speed of the elongated sheet ( 15 a ) located in the unit of front-end ( 10 ) and the carrying speed of the elongated sheet ( 15 b ) located in the unit of rear-end ( 10 ′) are modified and controlled to the same level.
  • the adjusting roller ( 35 ), provided between a pair of the support roller ( 33 , 33 ′) and wind the elongated sheet is moved to the upper side, among the elongated sheet ( 15 ) carried from the unit ( 10 ) in front-end to the unit ( 10 ′) in rear-end, the elongated sheet ( 15 a ), carried to outer side of the unit ( 10 ) in front-end and wound in the buffer section ( 31 ) located between each of the unit ( 10 , 10 ′) by the adjusting roller ( 35 ), is fastly provided to the unit ( 10 ′) in rear-side, carrying
  • the elongated sheet ( 15 ) is supplied to the electrospinning apparatus′(1) unit ( 10 ).
  • the elongated sheet ( 15 ) which is supplied to the electrospinning apparatus′(1) unit ( 10 ) through the supply roller ( 3 ) is located on the collector ( 13 ), the voltage generating device's ( 14 ) high voltage is occurred on the collector ( 13 ) through the nozzle ( 12 ), polymer spinning solution filled in spinning solution main tank (not shown) is jetted on the elongated sheet ( 15 ) which is on the collector ( 13 ) occurring high voltage through the nozzle block's ( 11 ) nozzle.
  • spinning solution filled in the spinning solution main tank is consecutively supplied in the required amount in a plurality of nozzles ( 12 ) with high voltage through the metering pump (not shown), spinning solution supplied to each of the nozzle ( 12 ) is spun and line-focused on the collector ( 13 ) applied high voltage through the nozzle ( 12 ), jetted on the elongated sheet ( 15 ) and nanofiber web is laminated and formed.
  • the elongated sheet ( 15 ) carried from the unit ( 10 ) in front-end to the unit in rear-end ( 10 ′) is conveyed through a pair of support roller ( 33 , 33 ′) provided in the buffer section ( 31 ) between each of the unit ( 10 , 10 ′), and simultaneously carried and wound by the adjusting roller ( 35 ) provided between a pair of the support roller ( 33 , 33 ′)
  • carrying speed of the elongated sheet ( 15 ) in each of the unit ( 10 , 10 ′) comprises 0.2 to 100 m/s, in the case of carrying speed of the elongated sheet ( 15 a ) located in the unit of front-side ( 10 ) and carrying speed of the elongated sheet ( 15 b ) located in the unit of rear-side ( 10 ′) are same, it operates well.
  • carrying speed of the elongated sheet ( 15 a ) located in the unit of front-side ( 10 ) and carrying speed of the elongated sheet ( 15 b ) located in the unit of front-side ( 10 ) are different, according to the elongated sheet carrying speed adjusting system ( 30 ) of the present invention, carrying speed of the elongated sheet ( 15 a ) carried from the unit ( 10 ) located in front-end among each of the unit ( 10 , 10 ′) or carrying speed of the elongated sheet ( 15 b ) carried from the unit ( 10 ′) located in rear-end is adjusted, and carrying speed of the elongated sheet ( 15 a , 15 b ) going through each of the unit ( 10 , 10 ′) are modified and controlled to the same level.
  • sensed carrying speed of the elongated sheet ( 15 a ) located in the unit of front side ( 10 ) is slower than carrying speed of the elongated sheet ( 15 b ) located in the unit of rear side ( 10 ′), for example, in the case of the elongated sheet ( 15 a ) in unit ( 10 ) located in front-end among each of the unit is 0.7, and the elongated sheet ( 15 b ) in unit located in rear-end is 1, the adjusting roller ( 35 ) winding the elongated sheet is moved to the lower side, among the elongated sheet ( 15 ) carried from the unit ( 10 ) located in front side to the unit ( 10 ′) located in rear-side, extra elongated sheet ( 15 a ) wound in the adjusting roller ( 35 ) is rapidly supplied to the unit ( 10 ′) in rear end, carrying speed of 0.3 is modified and controlled, carrying speed of the elongated sheet ( 15 a ) located in the unit of front side ( 10 ) and
  • defect-checking of air permeability of produced nanofiber is possible using an air permeability measuring device (not shown), using separate device for other post processing, process is performed, and the final product is manufactured.
  • the electrospinning apparatus ( 1 ) provided with the elongated sheet ( 15 ) going through between nozzle ( 12 ) and nozzle block ( 11 ) connected to minus terminal and collector ( 13 ) connected to plus terminal in desired carrying speed, in order to make it easier to desorption and carry of the elongated sheet ( 15 ) attached to the collector ( 13 ) by electrostatic attraction, auxiliary belt ( 16 ), rotating synchronized with carrying speed of the elongated sheet ( 15 ), and auxiliary carrying device, supporting the auxiliary belt ( 16 ) and comprising the auxiliary belt roller ( 17 ′) to assist rotation, are provided.
  • the auxiliary belt roller ( 17 ′) comprising roller with low friction coefficient, if a roller with low friction coefficient is applied, other various rollers can be applied, and a bearing (not shown) with low friction coefficient can be provided.
  • the nozzle block ( 11 ) comprises a plurality of nozzles, the nozzle block's ( 11 ) polymer solution discharge toward the collector from an outlet as nanofiber, nonofiber stacked on the elongated sheet ( 15 ), the elongated sheet ( 15 ) maintains uniform thickness and moves.
  • average diameter of nanofiber laminating formed on the elongated sheet ( 15 ) is tens to thousands nm
  • synthetic resin possible of electro spinning is not separately limited otherwise, for example, polypropylene (PP), polyethylene terephthalate (PET), polyvinylidene fluoride, nylon, polyvinyl acetate, polymethyl methacrylate, polyacrylonitrile (PAN), polyurethane (PUR), polybutylene terephthalate (PBT), polyvinyl butyral, polyvinyl chloride, polyethyleneimine, polyolefins, poly (lactic acid) (PLA), polyvinyl acetate (PVAc), polyethylene naphthalate (PEN), polyamide (PA), polyvinyl alcohol (PVA), polyethylene imide (PEI), polycaprolactone (PCL), polylactic glycolic acid (PLGA), silk, cellulose, and chitosan, and among them the material of polypropylene (PP), polyethylene terephthalate (PET
  • polymer solution is solution with dissolving polymer which is synthetic resin matter possible of electro spinning dissolved in suitable solvent, also the kind of solvent, as long as it can dissolve the polymer, are not limited, for example, phenol, formic acid, sulfuric acid, m-cresol, trifluorineaceticanhydride/dichloromethane, water, N-methylmorpholine N-oxide, chloroform, tetrahydrofuran and aliphatic ketone group such as methyl isobutyl ketone and methyl ethyl ketone, aliphatic hydroxyl group such as m-butyl alcohol, isobutyl alcohol, isopropyl alcohol, methyl alcohol, ethanol, aliphatic compound group such as haxane, tetrachlorethylene, acetone, glycol group such as propylene glycol, diethylene glycol, ethylene glycol, halogen compound group such as trichloroethylene, dichloromethane, aromatic compound group such as
  • temperature of each unit ( 10 , 10 ′) where polymer spinning solution is jetted through the electrospinning apparatus ( 1 ), for example, could be set to 25° C.
  • humidity of each unit ( 10 . 10 ′) for example, could be set to 30%, but does not limit to this.
  • the auxiliary carrying device (not shown) is additionally provided to each of the unit ( 10 , 10 ′) of the electrospinning apparatus ( 1 ) according to the second embodiment of the present invention, smoothly adjusts the elongated sheet ( 15 ) carrying, the elongated sheet ( 15 ) is attached to the collector ( 13 ), and prevents polymer spinning solution from uneven spinning due to uneven carrying.
  • the auxiliary carrying device has the auxiliary belt ( 16 ) operated by two auxiliary belt roller ( 17 ′) rotation, each of the auxiliary belt roller ( 17 ′) comprises roller with low friction coefficient.
  • the number of the auxiliary carrying device's auxiliary belt roller ( 17 ′) is two, as illustrated in FIG. 8 to FIG. 10 , the number of the auxiliary carrying device's auxiliary belt roller ( 17 ′) can be three, four or five, and the elongated sheet ( 15 ) carrying could be smoothly adjusted.
  • the electrospinning apparatus ( 1 ) auxiliary carrying device not only assists carrying of the elongated sheet ( 15 ) attached to the collector ( 13 ) with electrostatic attraction through the roller with low friction coefficient, but also adjusts stack amount of nanofiber laminated and formed on the elongated sheet ( 15 ) by adjusting the elongated sheet ( 15 ) height upper and lower side.
  • conditions of adjusting stack amount of nanofiber laminated and formed on the elongated sheet ( 15 ) are voltage adjusting, adjustment of polymer solution viscosity, adjustment of polymer solution temperature, adjustment of number of nozzle ( 12 ) which is outlet, and adjustment of distance between the nozzle block ( 11 ) and the elongated sheet ( 15 ) which nanofiber is stacked, and among them the most simple method to adjust stack amount maintaining nanofiber matter is adjusting the distance between the nozzle block ( 11 ) and the elongated sheet ( 15 ).
  • the electrospinning apparatus ( 1 ) of the present invention is for separating the elongated sheet ( 15 ) with the collector ( 13 ) and carrying, the elongated sheet ( 15 ) location can be easily controlled.
  • the elongated sheet ( 15 ) location is changed and nanofiber stack amount is adjusted, by moving location of the auxiliary belt roller ( 17 ′) provided in the auxiliary carrying device, the elongated sheet ( 15 ) height could be adjusted.
  • the auxiliary carrying device of electrospinning apparatus ( 1 ) comprises the auxiliary belt ( 16 ) and the auxiliary belt roller ( 17 ′) with low friction coefficient, as illustrated in FIG. 11 , each of the unit ( 10 , 10 ′) of the electrospinning apparatus ( 1 ) front and rear side is provided the roller ( 17 ′) with low friction coefficient, and enables to assist carrying of the elongated sheet ( 15 ).
  • roller with low friction coefficient a roller comprising ball bearing is shown, if comprising with a roller with low friction coefficient, the form and composition of a roller is not limited, more detail bearing such as rolling bearing, oil bearing, ball bearing, roller bearing, sliding bearing, sleeve bearing, hydrodynamic journal bearing, hydrostatic journal bearing, pneumatic bearing, air dynamic bearing, air static bearing, and air bearing could be comprised, and roller with low friction coefficient including material and additives such as plastic and emulsifier could be comprised.
  • bearing such as rolling bearing, oil bearing, ball bearing, roller bearing, sliding bearing, sleeve bearing, hydrodynamic journal bearing, hydrostatic journal bearing, pneumatic bearing, air dynamic bearing, air static bearing, and air bearing could be comprised, and roller with low friction coefficient including material and additives such as plastic and emulsifier could be comprised.
  • the electrospinning apparatus ( 1 ) has the elongated sheet ( 15 ) carrying in desired speed between the nozzle ( 12 ) and nozzle block ( 11 ) connected to minus terminal and the collector ( 13 ) connected to plus terminal, in order to make easily of desorption and carrying of the elongated sheet ( 15 ) attached to the collector ( 13 ) with electrostatic attraction, auxiliary belt ( 16 ), rotating synchronized with carrying speed of the elongated sheet ( 15 ), and auxiliary belt roller ( 17 ′), supporting the auxiliary belt ( 16 ) and assisting rotation, are provided, the auxiliary belt device (not shown) has the auxiliary belt driving device ( 18 ) as one among the auxiliary belt roller ( 17 ′), among the auxiliary belt device's auxiliary belt roller ( 17 ′) one or two or more auxiliary belt roller ( 17 ′) is driving roller (not shown) and the other auxiliary belt roller ( 17 ′) is preferably comprising driven
  • the sheet slacking sensing device ( 19 a ) which senses sagging of the elongated sheet ( 15 ), controls the speed, and receives signal controlling the speed is additionally connected and provided, controls the elongated sheet ( 15 ) carrying speed, automatically restores sagging of the elongated sheet ( 15 ), and enables mass-producing of nanofiber.
  • the auxiliary belt device provided in each of the unit ( 10 , 10 ′) of the electrospinning apparatus ( 1 ) comprises three auxiliary belt roller ( 17 ′), among three auxiliary belt roller ( 17 ′), one is driving roller comprising the auxiliary belt driving device ( 18 ), the other two auxiliary belt roller ( 17 ′) comprises driven roller, using the sheet slacking sensing device ( 19 a ) provided between each of the unit ( 10 , 10 ′), sagging of the elongated sheet ( 15 ) is sensed, and according to this, signal adjusting speed is transferred to the auxiliary belt driving device ( 18 ).
  • the auxiliary belt driving device ( 18 ) including the auxiliary belt roller ( 17 ′) preferably comprises the auxiliary belt roller ( 17 ′) and the driving device which rotates the auxiliary belt ( 16 ), the auxiliary belt driving device ( 18 ) is preferably operated by a motor.
  • the sheet slacking sensing device preferably comprises contact type or noncontact type of device sensing sagging of the elongated sheet ( 15 ), preferably comprises one among optic sensor, ultrasonic sensor, image sensor, or tension meter, as illustrated in FIG. 14 , more preferably the sheet slacking sensing device ( 19 a ) senses the location of the sheet exactly using ultrasonic sensor.
  • the auxiliary belt device provided in each of the unit ( 10 , 10 ′′) of the electrospinning apparatus ( 1 ) comprises three auxiliary belt roller ( 17 ′), among three auxiliary belt roller ( 17 ′) one is driving roller comprising auxiliary belt driving device ( 18 ), and the other two are driven roller.
  • auxiliary belt device provided in each unit ( 10 , 10 ′, 10 ′′) comprises five auxiliary belt roller ( 17 ′), among five auxiliary belt roller ( 17 ′), one is driving roller comprising auxiliary belt driving device ( 18 ), and the other four could be driven roller.
  • the sheet slacking sensing device ( 19 a ) is provided between each unit ( 10 , 10 ′, 10 ′′, 10 ′′′) arranged in series, where the elongated sheet is carried with desired speed and desired direction, the elongated sheet ( 15 ) supplied from the supply roller ( 3 ) is provided certain height and direction through the auxiliary roller ( 23 ), by the driving roller ( 24 , 25 , 26 , 27 ), maintains desired carrying speed, and moves forward toward the winding roller ( 5 ).
  • the auxiliary belt device comprises the auxiliary belt ( 16 ), the auxiliary belt roller ( 17 ′), and auxiliary belt driving device ( 18 ) provided one among the auxiliary belt roller ( 17 ′), the sheet slacking sensing device senses sagging of the elongated sheet ( 15 ) and adjusts speed of the auxiliary belt device, thereby the elongated sheet ( 15 ) in each of the unit ( 10 , 10 ′, 10 ′′, 10 ′′′) of the electrospinning apparatus ( 1 ) is smoothly carried.
  • heating temperature could be set differently according to the elongated sheet ( 15 ) or type of nanofiber.
  • heating device ( 29 ) it could be heated by heating temperature from 40 to 400° C.
  • the elongated sheet ( 15 ) passes through the heating device ( 29 ), the location of the elongated sheet ( 15 ) is modified in certain direction through the auxiliary roller ( 28 ), wound by the winding roller ( 5 ), nanofiber stacked and laminating on the elongated sheet ( 15 ) is manufactured to nanofiber non-woven fabric.
  • the sheet slacking sensing device ( 19 a ) is provided between each of the unit ( 10 , 10 ′, 10 ′′, 10 ′′′) of the electrospinning apparatus ( 1 ), as illustrated in FIG. 16 , the air permeability measuring device ( 19 b ) could be consecutively arranged and installed between each of the unit ( 10 , 10 ′, 10 ′′, 10 ′′′) of the electrospinning apparatus ( 1 ).
  • the air permeability measuring device ( 19 b ) is each provided between each of the unit ( 10 , 10 ′, 10 ′′, 10 ′′′) of the electrospinning apparatus ( 1 ) according to the fourth embodiment of the present invention.
  • the electrospinning apparatus ( 1 ) comprises bottom-up or top-down electrospinning apparatus, the electrospinning apparatus ( 1 ) provided in each of the unit ( 10 , 10 ′, 10 ′′, 10 ′′′) is installed in the case (not shown) comprising conductor or non-conductor.
  • the auxiliary belt ( 16 ), provided between the collector ( 13 ) and the elongated sheet ( 15 ), and the elongated sheet ( 15 ) on which nanofiber is stacked and formed are carried in horizontal direction
  • the auxiliary belt roller ( 17 ′) is an automatic roller with very low frictional force, by operating the auxiliary belt ( 6 ) provided between the collector ( 13 ) and the elongated sheet ( 15 ), the elongated sheet ( 15 ) is smoothly carried without pulling by the collector ( 13 ) with high voltage.
  • the elongated sheet ( 15 ) carrying speed and the nozzle block ( 11 ) discharging amount are controlled.
  • air permeability value of nanofiber, stacked and formed on the elongated sheet ( 15 ) passing through each of the unit ( 10 , 10 ′, 10 ′′, 10 ′′′) of the electrospinning apparatus ( 1 ) is small, larger air permeability can be attained by decreasing discharged amount of nanofiber per unit area of the elongated sheet ( 15 ) thereby decreasing stacked amount on the elongated sheet ( 15 ).
  • the air permeability measuring device ( 19 b ) is preferably measuring device with ultrasonic method, but it is not limited to this.
  • a plurality of nozzle ( 12 ) is provided, a plurality of tubular body ( 43 ) having the nozzle ( 12 ) for spinning polymer spinning solution upward or downward from the outlet (not shown) is arranged and installed, polymer spinning solution spun from the plurality of nozzle ( 12 ) outlet could be overflow and reused, through the nozzle block discharging amount control device ( 60 ) connected to the tubular body ( 43 ) having the plurality of nozzle ( 12 ) with the nozzle block discharging amount control device connection ( 61 ), polymer spinning solution discharging amount from the polymer solution storage tank ( 44 ) connected to each of the nozzle ( 12 ) with the polymer solution circulation pipe ( 45 ) could be automatically controlled.
  • air permeability of the elongated sheet ( 15 ) on which nanofiber is stacked and formed means air permeability value measured in the state of nanofiber layer laminated and formed on the elongated sheet ( 15 ) on which nanofiber is stacked and formed.
  • the main control device ( 50 ) in the case the nanofiber air permeability deviation is less than a desired value, the main control device ( 50 ) doesn't change carrying speed from initial value, in the case the deviation is more than a desired value, the main control device ( 50 ) could be controlled by changing carrying speed from initial value, and carrying speed control can be simplified.
  • the nozzle block discharging amount control device ( 60 ) doesn't change the nozzle block ( 11 ) discharging amount from initial value, and simultaneously doesn't change voltage intensity from initial value.
  • the nozzle block ( 11 ) discharging amount and voltage intensity could be controlled by changing from initial value, control of the nozzle block ( 11 ) discharging amount and voltage intensity could be simplified.
  • Permeability measuring tester does reciprocating motion in desired cycle according along the elongated sheet ( 15 ) width direction, through an ultrasonic sensor, measures the elongated sheet ( 15 ) air permeability.
  • Air permeability measurement according to the air permeability measuring tester is carried out, for example, every 10 ms.
  • nozzle block discharging amount and voltage are controlled.
  • the elongated sheet ( 15 ) is carried in desired carrying speed from the supply roller ( 3 ) toward the winding roller ( 5 ), laminating nanofiber in order.
  • measuring air permeability of the elongated sheet ( 15 ) laminating formed nanofiber from the unit ( 10 , 10 ′, 10 ′′) of front-end according to the electrospinning apparatus simultaneously based on measured air permeability by the air permeability measuring device ( 19 b ), carrying speed is controlled, after laminating nanofiber on the elongated sheet ( 15 ) consecutively in the unit ( 10 ′, 10 ′′, 10 ′′′) of rear-end, air permeability is measured, repeatedly carrying speed is controlled, and nanofiber is laminated.
  • the elongated sheet ( 15 ) is carried in desired carrying speed from the supply roller ( 3 ) toward the winding roller ( 5 ), laminating nanofiber in order.
  • the elongated sheet ( 15 ) is carried in desired carrying speed from the supply roller ( 11 ) toward the winding roller ( 12 ), laminating nanofiber in order.
  • nanofiber with uniform air permeability could be manufactured.
  • the air permeability measuring device ( 19 b ) is provided between each of the unit ( 10 , 10 ′, 10 ′′, 10 ′′′) of the electrospinning apparatus ( 1 ), as illustrated in FIG. 18 , the thickness measurement device ( 19 c ) could be successively arranged and installed between each of the unit ( 10 , 10 ′, 10 ′′, 10 ′′′) of the electrospinning apparatus ( 1 ).
  • the thickness measurement device ( 19 c ) is each provided between each of the unit ( 10 , 10 ′, 10 ′′, 10 ′′′) of the electrospinning apparatus ( 1 ) according to the fifth embodiment of the present invention.
  • the elongated sheet ( 15 ) carrying speed and the nozzle bock ( 11 ) discharging amount can be controlled.
  • thickness value of nanofiber, stacked and formed on the elongated sheet ( 15 ) passing through each of the unit ( 10 , 10 ′, 10 ′′, 10 ′′′) of the electrospinning apparatus ( 1 ), is measured thicker than deviation
  • thinner thickness value can be attained by decreasing discharged amount of nanofiber per unit area of the elongated sheet ( 15 ) thereby decreasing stacked amount on the elongated sheet ( 15 ).
  • the thickness measurement device ( 19 c ) is arranged in opposite sides between the elongated sheet ( 15 ), using ultrasonic measuring method, thickness measuring tester (not shown), which measures the distance to the elongated sheet ( 15 ) and comprising a pair of ultrasonic, longitudinal wave, and transverse wave measuring method, is provided, based on measured distance according to the thickness measurement device ( 19 c ), the elongated sheet ( 15 ) thickness could be calculated.
  • the thickness measurement device ( 19 c ) uses ultrasonic longitudinal wave and transverse wave to calculate the thickness of a subject.
  • the thickness measurement device ( 19 c ) projects ultrasonic longitudinal wave and transverse wave together on the elongated sheet ( 15 ) laminating nanofiber, after measuring reciprocating motion time of each ultrasonic signal of longitudinal wave and transverse wave from the elongated sheet ( 15 ), in other words, after measuring each propagation time of longitudinal wave and transverse wave, the thickness of a subject can be calculated from predetermined formula using propagation time of measured longitudinal wave and transverse wave, propagation speed of measured longitudinal wave and transverse wave in reference temperature of the elongated sheet ( 15 ) laminating nanofiber, and a temperature constant of propagation speed of longitudinal wave and transverse wave.
  • the thickness of the elongated sheet ( 15 ) laminating nanofiber can be calculated from predetermined formula using propagation time of measured longitudinal wave and transverse wave, propagation speed of measured longitudinal wave and transverse wave in reference temperature of the elongated sheet ( 15 ) laminating nanofiber, and a temperature constant of propagation speed of longitudinal wave and transverse wave.
  • the thickness could be accurately measured even in the state of uneven inner temperature by self compensating error made by change of propagation speed according to change of temperature, thereby the thickness could be accurately measured even though there is temperature distribution in any form inside nanofiber in the thickness measurement device ( 19 c ).
  • a plurality of nozzle ( 12 ) is provided, a plurality of tubular bodies ( 43 ) having the nozzle ( 12 ) for spinning polymer spinning solution upward or downward from the outlet (not shown) is arranged and installed, polymer spinning solution spun from the plurality of nozzle ( 12 ) outlet could be overflow and reused, through the nozzle block discharging amount control device ( 60 ) connected to the tubular body ( 43 ) having the plurality of nozzle ( 12 ) with the nozzle block discharging amount control device connection ( 61 ), polymer spinning solution discharging amount from the polymer solution storage tank ( 44 ) connected to each of the nozzle ( 12 ) with the polymer solution circulation pipe ( 45 ) could be automatically controlled.
  • thickness of the elongated sheet ( 15 ) on which nanofiber is stacked and formed means measured thickness value in state of nanofiber layer laminated and formed on the elongated sheet ( 15 ) on which nanofiber is stacked and formed.
  • the main control device ( 50 ) in the case the nanofiber thickness deviation is less than a desired value, the main control device ( 50 ) doesn't change carrying speed from the initial value, and in the case the thickness deviation is more than a desired value, the main control device ( 50 ) controls to change carrying speed from the initial value, so carrying speed control are simplified.
  • the nozzle block discharging amount control device ( 60 ) doesn't change the nozzle block ( 11 ) discharging amount from the initial value, simultaneously the main control device ( 50 ) doesn't change voltage intensity from the initial value, and in the case of the thickness deviation is more than a desired value, through the nozzle block discharging amount control device ( 60 ) and the main control device ( 50 ), the nozzle block ( 11 ) discharging amount and voltage intensity could be controlled to be changed from the initial value, so the nozzle block ( 11 ) discharging amount and voltage intensity control are simplified.
  • Manufactured nanofiber thickness is set to goal thickeness.
  • the thickness measurement tester does reciprocating motion in desired cycle along the elongated sheet ( 15 ) width direction, through an ultrasonic sensor, measures the elongated sheet ( 5 ) thickness. Thickness measurement using the thickness measurement device is carried, for example, every 10 ms.
  • nozzle block discharging amount and voltage are controlled.
  • the elongated sheet ( 15 ) is carried in desired carrying speed (V) from the supply roller ( 3 ) toward the winding roller ( 5 ), laminating nanofiber in order.
  • measuring thickness of the elongated sheet ( 15 ) on which nanofiber is laminated and formed from the unit of front-end ( 10 , 10 ′, 10 ′′) according to the electrospinning apparatus simultaneously based on measured thickness according to the thickness measurement device ( 19 c ), carrying speed is controlled, after laminating nanofiber on the elongated sheet ( 15 ) consecutively from the unit of rear-end ( 10 , 10 ′, 10 ′′), thickness is measured, repeatedly carrying speed is controlled, and nanofiber is laminated.
  • the elongated sheet ( 15 ) is carried in desired carrying speed (V) from the supply roller ( 3 ) toward the winding roller ( 5 ), laminating nanofiber in order.
  • the elongated sheet ( 15 ) is carried in desired carrying speed from the supply roller ( 11 ) toward the winding roller ( 12 ), laminating nanofiber in order.
  • nanofiber with uniform thickness could be manufactured.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Nonwoven Fabrics (AREA)
US14/784,752 2013-04-17 2014-02-26 Electrospinning apparatus Abandoned US20160060790A1 (en)

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KR1020130042247A KR101382572B1 (ko) 2013-04-17 2013-04-17 속도 제어가 가능한 전기방사장치
KR10-2013-0042252 2013-04-17
KR1020130042252A KR101382575B1 (ko) 2013-04-17 2013-04-17 보조 이송장치를 포함한 전기방사장치
KR10/2013-0042250 2013-04-17
KR1020130042250A KR101466291B1 (ko) 2013-04-17 2013-04-17 제어 시스템이 구비된 전기방사장치
KR10-2013-0042248 2013-04-17
KR20130042253A KR101479751B1 (ko) 2013-04-17 2013-04-17 나노섬유 제조용 전기방사장치
KR10-2013-0042253 2013-04-17
KR10-2013-0042247 2013-04-17
KR1020130042248A KR101517984B1 (ko) 2013-04-17 2013-04-17 제어 시스템이 구비된 전기방사장치
PCT/KR2014/001583 WO2014171624A1 (ko) 2013-04-17 2014-02-26 전기방사장치

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