Abstract: The present invention relates to a process of preparing a continuous filament composed of a nano fiber, wherein nano fibers are prepared by spinning a polymer spinning dope in a spinning dope main tank (20) onto the surface of water or organic solvent (4a) of a collector (4), which contains water or inorganic solvent (4a) and has a conductive material (5) with a high voltage applied sunken in the water or organic solvent (4a), through nozzles (2) with a high voltage applied, and the nano fibers are pressed, drawn, dried and wound while being pulled by a rotary roller (6) rotating at a constant linear velocity from the location spaced more than 1 cm from one end of a dropping spot. The present invention can prepare a continuous filament composed of a nano fiber by an electrospinning method and a continuous process.

Abstract: An electrospinning apparatus including a spinning dope main tank, a metering pump, a nozzle block, a collector positioned at the lower end of the nozzle block for collecting spun fibers, a voltage generator, a plurality of units for transmitting a voltage generated by the voltage generator to the nozzle block and the collector, said electrospinning apparatus containing: a spinning dope drop device positioned between the metering pump and the nozzle block, the spinning dope drop device having (i) a sealed cylindrical shape, (ii) a spinning dope inducing tube and a gas inlet tube for receiving gas through its lower end and having its gas inlet part connected to a filter aligned, side-by-side, at the upper portion of the spinning dope drop device, (iii) a spinning dope discharge tube extending from the lower portion of the spinning dope drop device, and (iv) a hollow unit for receiving the spinning dope from the spinning dope inducing tube provided at the middle portion of the spinning dope-drop device.

Abstract: An electrospinning apparatus including a spinning dope main tank, a metering pump, a nozzle block, a collector positioned at the lower end of the nozzle block for collecting spun fibers, a voltage generator, a plurality of units for transmitting a voltage generated by the voltage generator to the nozzle block and the collector, said electrospinning apparatus containing: a spinning dope drop device positioned between the metering pump and the nozzle block, the spinning dope drop device having (i) a sealed cylindrical shape, (ii) a spinning dope inducing tube and a gas inletting tube for receiving gas through its lower end and having its gas inletting part connected to a filter aligned side-by-side at the upper portion of the spinning dope drop device, (iii) a spinning dope discharge tube extending from the lower portion of the spinning dope drop device, and (iv) a hollow unit for dropping the spinning dope from the spinning dope inducing tube formed at the middle portion of the spinning dope-drop device.

Abstract: An electrospinning apparatus including a spinning dope main tank, a metering pump, a nozzle block, a collector positioned at the lower end of the nozzle block for collecting spun fibers, a voltage generator, a plurality of units for transmitting a voltage generated by the voltage generator to the nozzle block and the collector, said electrospinning apparatus containing a spinning dope drop device positioned between the metering pump and the nozzle block, the spinning dope drove device having (i) a sealed cylindrical shape, (ii) a spinning dope inducing tube and a gas inletting tube for receiving gas through its lower end and having its gas inletting part connected to a filter aligned side-by-side at the upper portion of the spinning dope drop device, (iii) a spinning dope discharge tube extending from the lower portion of the spinning dope drop device and (iv) a hollow unit for dropping the spinning dope from the spinning dope inducing tube formed at the middle portion of the spinning dope drop device.

Abstract: The present invention relates to a process of preparing a continuous filament composed of a nano fiber, wherein nano fibers are prepared by spinning a polymer spinning dope in a spinning dope main tank (20) onto the surface of water or organic solvent (4a) of a collector (4), which contains water or inorganic solvent (4a) and has a conductive material (5) with a high voltage applied sunken in the water or organic solvent (4a), through nozzles (2) with a high voltage applied, and the nano fibers are pressed, drawn, dried and wound while being pulled by a rotary roller (6) rotating at a constant linear velocity from the location spaced more than 1 cm from one end of a dropping spot. The present invention can prepare a continuous filament composed of a nano fiber by an electrospinning method and a continuous process.

Abstract: The present invention relates to ultra-fine inorganic fibers and a method of producing the same. The method of producing ultra-fine inorganic fibers comprises the steps of: mixing sol or gel containing an inorganic material and thermoplastic resin solution and reacting them to produce a mixture solution thereof; electronically spinning the mixture solution under a high voltage to produce a composite fiber with the inorganic material embedded in the thermoplastic resin; and carbonating the thermoplastic resin in the composite fiber or dissolving the same in a solvent. Thereby an ultra-fine inorganic fiber is prepared which has a length 100 to 10,000 times larger than its diameter and a diameter of 10 to 1,000 nm. The ultra-fine inorganic fiber of the present invention has a very large specific surface area with respect to its volume. Thus it is very useful as catalyst supporting materials, reinforcing materials, coating materials or the like in every field of industry.

Abstract: The present invention relates to ultra-fine inorganic fibers and a method of producing the same. The method of producing ultra-fine inorganic fibers comprises the steps of: mixing sol or gel containing an inorganic material and thermoplastic resin solution and reacting them to produce a mixture solution thereof; electronically spinning the mixture solution under a high voltage to produce a composite fiber with the inorganic material embedded in the thermoplastic resin; and carbonating the thermoplastic resin in the composite fiber or dissolving the same in a solvent. Thereby an ultra-fine inorganic fiber is prepared which has a length 100 to 10,000 times larger than its diameter and a diameter of 10 to 1,000 nm. The ultra-fine inorganic fiber of the present invention has a very large specific surface area with respect to its volume. Thus it is very useful as catalyst supporting materials, reinforcing materials, coating materials or the like in every field of industry.

Abstract: The present invention relates to an electrospinning apparatus including a spinning dope drop device (3) formed between a metering pump (2) and a nozzle block (4), the spinning dope drop device (3) including (i) a sealed cylindrical shape, (ii) a spinning dope inducing tube 3c and a gas inletting tube 3b receiving gas through its lower end and having its gas inletting part connected to a filter 3a being aligned side by side at the upper portion of the spinning dope drop device, (iii) a spinning dope discharge tube 3d being protruded from the lower portion of which, and (iv) a hollow unit for dropping the spinning dope from the spinning dope inducing tube 3c being formed at the middle portion of which. In addition, a method for preparing a non-woven fabric drops flowing of a spinning dope at least once by passing the spinning dope through a spinning dope drop device (3) before supplying the spinning dope to a nozzle block (4) supplied with a voltage in electrospinning.